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Linux 2.6.33-rc8
[linux-2.6/lguest.git] / drivers / char / synclinkmp.c
blob2b18adc4ee1930818c856b92672af4b11b68671c
1 /*
2 * $Id: synclinkmp.c,v 4.38 2005/07/15 13:29:44 paulkf Exp $
3 *
4 * Device driver for Microgate SyncLink Multiport
5 * high speed multiprotocol serial adapter.
6 *
7 * written by Paul Fulghum for Microgate Corporation
8 * paulkf@microgate.com
9 *
10 * Microgate and SyncLink are trademarks of Microgate Corporation
11 *
12 * Derived from serial.c written by Theodore Ts'o and Linus Torvalds
13 * This code is released under the GNU General Public License (GPL)
14 *
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
16 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
25 * OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
29 #if defined(__i386__)
30 # define BREAKPOINT() asm(" int $3");
31 #else
32 # define BREAKPOINT() { }
33 #endif
34
35 #define MAX_DEVICES 12
36
37 #include <linux/module.h>
38 #include <linux/errno.h>
39 #include <linux/signal.h>
40 #include <linux/sched.h>
41 #include <linux/timer.h>
42 #include <linux/interrupt.h>
43 #include <linux/pci.h>
44 #include <linux/tty.h>
45 #include <linux/tty_flip.h>
46 #include <linux/serial.h>
47 #include <linux/major.h>
48 #include <linux/string.h>
49 #include <linux/fcntl.h>
50 #include <linux/ptrace.h>
51 #include <linux/ioport.h>
52 #include <linux/mm.h>
53 #include <linux/seq_file.h>
54 #include <linux/slab.h>
55 #include <linux/smp_lock.h>
56 #include <linux/netdevice.h>
57 #include <linux/vmalloc.h>
58 #include <linux/init.h>
59 #include <linux/delay.h>
60 #include <linux/ioctl.h>
61
62 #include <asm/system.h>
63 #include <asm/io.h>
64 #include <asm/irq.h>
65 #include <asm/dma.h>
66 #include <linux/bitops.h>
67 #include <asm/types.h>
68 #include <linux/termios.h>
69 #include <linux/workqueue.h>
70 #include <linux/hdlc.h>
71 #include <linux/synclink.h>
72
73 #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINKMP_MODULE))
74 #define SYNCLINK_GENERIC_HDLC 1
75 #else
76 #define SYNCLINK_GENERIC_HDLC 0
77 #endif
78
79 #define GET_USER(error,value,addr) error = get_user(value,addr)
80 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
81 #define PUT_USER(error,value,addr) error = put_user(value,addr)
82 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
83
84 #include <asm/uaccess.h>
85
86 static MGSL_PARAMS default_params = {
87 MGSL_MODE_HDLC, /* unsigned long mode */
88 0, /* unsigned char loopback; */
89 HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
90 HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
91 0, /* unsigned long clock_speed; */
92 0xff, /* unsigned char addr_filter; */
93 HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
94 HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
95 HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
96 9600, /* unsigned long data_rate; */
97 8, /* unsigned char data_bits; */
98 1, /* unsigned char stop_bits; */
99 ASYNC_PARITY_NONE /* unsigned char parity; */
100 };
101
102 /* size in bytes of DMA data buffers */
103 #define SCABUFSIZE 1024
104 #define SCA_MEM_SIZE 0x40000
105 #define SCA_BASE_SIZE 512
106 #define SCA_REG_SIZE 16
107 #define SCA_MAX_PORTS 4
108 #define SCAMAXDESC 128
109
110 #define BUFFERLISTSIZE 4096
111
112 /* SCA-I style DMA buffer descriptor */
113 typedef struct _SCADESC
114 {
115 u16 next; /* lower l6 bits of next descriptor addr */
116 u16 buf_ptr; /* lower 16 bits of buffer addr */
117 u8 buf_base; /* upper 8 bits of buffer addr */
118 u8 pad1;
119 u16 length; /* length of buffer */
120 u8 status; /* status of buffer */
121 u8 pad2;
122 } SCADESC, *PSCADESC;
123
124 typedef struct _SCADESC_EX
125 {
126 /* device driver bookkeeping section */
127 char *virt_addr; /* virtual address of data buffer */
128 u16 phys_entry; /* lower 16-bits of physical address of this descriptor */
129 } SCADESC_EX, *PSCADESC_EX;
130
131 /* The queue of BH actions to be performed */
132
133 #define BH_RECEIVE 1
134 #define BH_TRANSMIT 2
135 #define BH_STATUS 4
136
137 #define IO_PIN_SHUTDOWN_LIMIT 100
138
139 struct _input_signal_events {
140 int ri_up;
141 int ri_down;
142 int dsr_up;
143 int dsr_down;
144 int dcd_up;
145 int dcd_down;
146 int cts_up;
147 int cts_down;
148 };
149
150 /*
151 * Device instance data structure
152 */
153 typedef struct _synclinkmp_info {
154 void *if_ptr; /* General purpose pointer (used by SPPP) */
155 int magic;
156 struct tty_port port;
157 int line;
158 unsigned short close_delay;
159 unsigned short closing_wait; /* time to wait before closing */
160
161 struct mgsl_icount icount;
162
163 int timeout;
164 int x_char; /* xon/xoff character */
165 u16 read_status_mask1; /* break detection (SR1 indications) */
166 u16 read_status_mask2; /* parity/framing/overun (SR2 indications) */
167 unsigned char ignore_status_mask1; /* break detection (SR1 indications) */
168 unsigned char ignore_status_mask2; /* parity/framing/overun (SR2 indications) */
169 unsigned char *tx_buf;
170 int tx_put;
171 int tx_get;
172 int tx_count;
173
174 wait_queue_head_t status_event_wait_q;
175 wait_queue_head_t event_wait_q;
176 struct timer_list tx_timer; /* HDLC transmit timeout timer */
177 struct _synclinkmp_info *next_device; /* device list link */
178 struct timer_list status_timer; /* input signal status check timer */
179
180 spinlock_t lock; /* spinlock for synchronizing with ISR */
181 struct work_struct task; /* task structure for scheduling bh */
182
183 u32 max_frame_size; /* as set by device config */
184
185 u32 pending_bh;
186
187 bool bh_running; /* Protection from multiple */
188 int isr_overflow;
189 bool bh_requested;
190
191 int dcd_chkcount; /* check counts to prevent */
192 int cts_chkcount; /* too many IRQs if a signal */
193 int dsr_chkcount; /* is floating */
194 int ri_chkcount;
195
196 char *buffer_list; /* virtual address of Rx & Tx buffer lists */
197 unsigned long buffer_list_phys;
198
199 unsigned int rx_buf_count; /* count of total allocated Rx buffers */
200 SCADESC *rx_buf_list; /* list of receive buffer entries */
201 SCADESC_EX rx_buf_list_ex[SCAMAXDESC]; /* list of receive buffer entries */
202 unsigned int current_rx_buf;
203
204 unsigned int tx_buf_count; /* count of total allocated Tx buffers */
205 SCADESC *tx_buf_list; /* list of transmit buffer entries */
206 SCADESC_EX tx_buf_list_ex[SCAMAXDESC]; /* list of transmit buffer entries */
207 unsigned int last_tx_buf;
208
209 unsigned char *tmp_rx_buf;
210 unsigned int tmp_rx_buf_count;
211
212 bool rx_enabled;
213 bool rx_overflow;
214
215 bool tx_enabled;
216 bool tx_active;
217 u32 idle_mode;
218
219 unsigned char ie0_value;
220 unsigned char ie1_value;
221 unsigned char ie2_value;
222 unsigned char ctrlreg_value;
223 unsigned char old_signals;
224
225 char device_name[25]; /* device instance name */
226
227 int port_count;
228 int adapter_num;
229 int port_num;
230
231 struct _synclinkmp_info *port_array[SCA_MAX_PORTS];
232
233 unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */
234
235 unsigned int irq_level; /* interrupt level */
236 unsigned long irq_flags;
237 bool irq_requested; /* true if IRQ requested */
238
239 MGSL_PARAMS params; /* communications parameters */
240
241 unsigned char serial_signals; /* current serial signal states */
242
243 bool irq_occurred; /* for diagnostics use */
244 unsigned int init_error; /* Initialization startup error */
245
246 u32 last_mem_alloc;
247 unsigned char* memory_base; /* shared memory address (PCI only) */
248 u32 phys_memory_base;
249 int shared_mem_requested;
250
251 unsigned char* sca_base; /* HD64570 SCA Memory address */
252 u32 phys_sca_base;
253 u32 sca_offset;
254 bool sca_base_requested;
255
256 unsigned char* lcr_base; /* local config registers (PCI only) */
257 u32 phys_lcr_base;
258 u32 lcr_offset;
259 int lcr_mem_requested;
260
261 unsigned char* statctrl_base; /* status/control register memory */
262 u32 phys_statctrl_base;
263 u32 statctrl_offset;
264 bool sca_statctrl_requested;
265
266 u32 misc_ctrl_value;
267 char flag_buf[MAX_ASYNC_BUFFER_SIZE];
268 char char_buf[MAX_ASYNC_BUFFER_SIZE];
269 bool drop_rts_on_tx_done;
270
271 struct _input_signal_events input_signal_events;
272
273 /* SPPP/Cisco HDLC device parts */
274 int netcount;
275 spinlock_t netlock;
276
277 #if SYNCLINK_GENERIC_HDLC
278 struct net_device *netdev;
279 #endif
280
281 } SLMP_INFO;
282
283 #define MGSL_MAGIC 0x5401
284
285 /*
286 * define serial signal status change macros
287 */
288 #define MISCSTATUS_DCD_LATCHED (SerialSignal_DCD<<8) /* indicates change in DCD */
289 #define MISCSTATUS_RI_LATCHED (SerialSignal_RI<<8) /* indicates change in RI */
290 #define MISCSTATUS_CTS_LATCHED (SerialSignal_CTS<<8) /* indicates change in CTS */
291 #define MISCSTATUS_DSR_LATCHED (SerialSignal_DSR<<8) /* change in DSR */
292
293 /* Common Register macros */
294 #define LPR 0x00
295 #define PABR0 0x02
296 #define PABR1 0x03
297 #define WCRL 0x04
298 #define WCRM 0x05
299 #define WCRH 0x06
300 #define DPCR 0x08
301 #define DMER 0x09
302 #define ISR0 0x10
303 #define ISR1 0x11
304 #define ISR2 0x12
305 #define IER0 0x14
306 #define IER1 0x15
307 #define IER2 0x16
308 #define ITCR 0x18
309 #define INTVR 0x1a
310 #define IMVR 0x1c
311
312 /* MSCI Register macros */
313 #define TRB 0x20
314 #define TRBL 0x20
315 #define TRBH 0x21
316 #define SR0 0x22
317 #define SR1 0x23
318 #define SR2 0x24
319 #define SR3 0x25
320 #define FST 0x26
321 #define IE0 0x28
322 #define IE1 0x29
323 #define IE2 0x2a
324 #define FIE 0x2b
325 #define CMD 0x2c
326 #define MD0 0x2e
327 #define MD1 0x2f
328 #define MD2 0x30
329 #define CTL 0x31
330 #define SA0 0x32
331 #define SA1 0x33
332 #define IDL 0x34
333 #define TMC 0x35
334 #define RXS 0x36
335 #define TXS 0x37
336 #define TRC0 0x38
337 #define TRC1 0x39
338 #define RRC 0x3a
339 #define CST0 0x3c
340 #define CST1 0x3d
341
342 /* Timer Register Macros */
343 #define TCNT 0x60
344 #define TCNTL 0x60
345 #define TCNTH 0x61
346 #define TCONR 0x62
347 #define TCONRL 0x62
348 #define TCONRH 0x63
349 #define TMCS 0x64
350 #define TEPR 0x65
351
352 /* DMA Controller Register macros */
353 #define DARL 0x80
354 #define DARH 0x81
355 #define DARB 0x82
356 #define BAR 0x80
357 #define BARL 0x80
358 #define BARH 0x81
359 #define BARB 0x82
360 #define SAR 0x84
361 #define SARL 0x84
362 #define SARH 0x85
363 #define SARB 0x86
364 #define CPB 0x86
365 #define CDA 0x88
366 #define CDAL 0x88
367 #define CDAH 0x89
368 #define EDA 0x8a
369 #define EDAL 0x8a
370 #define EDAH 0x8b
371 #define BFL 0x8c
372 #define BFLL 0x8c
373 #define BFLH 0x8d
374 #define BCR 0x8e
375 #define BCRL 0x8e
376 #define BCRH 0x8f
377 #define DSR 0x90
378 #define DMR 0x91
379 #define FCT 0x93
380 #define DIR 0x94
381 #define DCMD 0x95
382
383 /* combine with timer or DMA register address */
384 #define TIMER0 0x00
385 #define TIMER1 0x08
386 #define TIMER2 0x10
387 #define TIMER3 0x18
388 #define RXDMA 0x00
389 #define TXDMA 0x20
390
391 /* SCA Command Codes */
392 #define NOOP 0x00
393 #define TXRESET 0x01
394 #define TXENABLE 0x02
395 #define TXDISABLE 0x03
396 #define TXCRCINIT 0x04
397 #define TXCRCEXCL 0x05
398 #define TXEOM 0x06
399 #define TXABORT 0x07
400 #define MPON 0x08
401 #define TXBUFCLR 0x09
402 #define RXRESET 0x11
403 #define RXENABLE 0x12
404 #define RXDISABLE 0x13
405 #define RXCRCINIT 0x14
406 #define RXREJECT 0x15
407 #define SEARCHMP 0x16
408 #define RXCRCEXCL 0x17
409 #define RXCRCCALC 0x18
410 #define CHRESET 0x21
411 #define HUNT 0x31
412
413 /* DMA command codes */
414 #define SWABORT 0x01
415 #define FEICLEAR 0x02
416
417 /* IE0 */
418 #define TXINTE BIT7
419 #define RXINTE BIT6
420 #define TXRDYE BIT1
421 #define RXRDYE BIT0
422
423 /* IE1 & SR1 */
424 #define UDRN BIT7
425 #define IDLE BIT6
426 #define SYNCD BIT4
427 #define FLGD BIT4
428 #define CCTS BIT3
429 #define CDCD BIT2
430 #define BRKD BIT1
431 #define ABTD BIT1
432 #define GAPD BIT1
433 #define BRKE BIT0
434 #define IDLD BIT0
435
436 /* IE2 & SR2 */
437 #define EOM BIT7
438 #define PMP BIT6
439 #define SHRT BIT6
440 #define PE BIT5
441 #define ABT BIT5
442 #define FRME BIT4
443 #define RBIT BIT4
444 #define OVRN BIT3
445 #define CRCE BIT2
446
447
448 /*
449 * Global linked list of SyncLink devices
450 */
451 static SLMP_INFO *synclinkmp_device_list = NULL;
452 static int synclinkmp_adapter_count = -1;
453 static int synclinkmp_device_count = 0;
454
455 /*
456 * Set this param to non-zero to load eax with the
457 * .text section address and breakpoint on module load.
458 * This is useful for use with gdb and add-symbol-file command.
459 */
460 static int break_on_load = 0;
461
462 /*
463 * Driver major number, defaults to zero to get auto
464 * assigned major number. May be forced as module parameter.
465 */
466 static int ttymajor = 0;
467
468 /*
469 * Array of user specified options for ISA adapters.
470 */
471 static int debug_level = 0;
472 static int maxframe[MAX_DEVICES] = {0,};
473
474 module_param(break_on_load, bool, 0);
475 module_param(ttymajor, int, 0);
476 module_param(debug_level, int, 0);
477 module_param_array(maxframe, int, NULL, 0);
478
479 static char *driver_name = "SyncLink MultiPort driver";
480 static char *driver_version = "$Revision: 4.38 $";
481
482 static int synclinkmp_init_one(struct pci_dev *dev,const struct pci_device_id *ent);
483 static void synclinkmp_remove_one(struct pci_dev *dev);
484
485 static struct pci_device_id synclinkmp_pci_tbl[] = {
486 { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_SCA, PCI_ANY_ID, PCI_ANY_ID, },
487 { 0, }, /* terminate list */
488 };
489 MODULE_DEVICE_TABLE(pci, synclinkmp_pci_tbl);
490
491 MODULE_LICENSE("GPL");
492
493 static struct pci_driver synclinkmp_pci_driver = {
494 .name = "synclinkmp",
495 .id_table = synclinkmp_pci_tbl,
496 .probe = synclinkmp_init_one,
497 .remove = __devexit_p(synclinkmp_remove_one),
498 };
499
500
501 static struct tty_driver *serial_driver;
502
503 /* number of characters left in xmit buffer before we ask for more */
504 #define WAKEUP_CHARS 256
505
506
507 /* tty callbacks */
508
509 static int open(struct tty_struct *tty, struct file * filp);
510 static void close(struct tty_struct *tty, struct file * filp);
511 static void hangup(struct tty_struct *tty);
512 static void set_termios(struct tty_struct *tty, struct ktermios *old_termios);
513
514 static int write(struct tty_struct *tty, const unsigned char *buf, int count);
515 static int put_char(struct tty_struct *tty, unsigned char ch);
516 static void send_xchar(struct tty_struct *tty, char ch);
517 static void wait_until_sent(struct tty_struct *tty, int timeout);
518 static int write_room(struct tty_struct *tty);
519 static void flush_chars(struct tty_struct *tty);
520 static void flush_buffer(struct tty_struct *tty);
521 static void tx_hold(struct tty_struct *tty);
522 static void tx_release(struct tty_struct *tty);
523
524 static int ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
525 static int chars_in_buffer(struct tty_struct *tty);
526 static void throttle(struct tty_struct * tty);
527 static void unthrottle(struct tty_struct * tty);
528 static int set_break(struct tty_struct *tty, int break_state);
529
530 #if SYNCLINK_GENERIC_HDLC
531 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
532 static void hdlcdev_tx_done(SLMP_INFO *info);
533 static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size);
534 static int hdlcdev_init(SLMP_INFO *info);
535 static void hdlcdev_exit(SLMP_INFO *info);
536 #endif
537
538 /* ioctl handlers */
539
540 static int get_stats(SLMP_INFO *info, struct mgsl_icount __user *user_icount);
541 static int get_params(SLMP_INFO *info, MGSL_PARAMS __user *params);
542 static int set_params(SLMP_INFO *info, MGSL_PARAMS __user *params);
543 static int get_txidle(SLMP_INFO *info, int __user *idle_mode);
544 static int set_txidle(SLMP_INFO *info, int idle_mode);
545 static int tx_enable(SLMP_INFO *info, int enable);
546 static int tx_abort(SLMP_INFO *info);
547 static int rx_enable(SLMP_INFO *info, int enable);
548 static int modem_input_wait(SLMP_INFO *info,int arg);
549 static int wait_mgsl_event(SLMP_INFO *info, int __user *mask_ptr);
550 static int tiocmget(struct tty_struct *tty, struct file *file);
551 static int tiocmset(struct tty_struct *tty, struct file *file,
552 unsigned int set, unsigned int clear);
553 static int set_break(struct tty_struct *tty, int break_state);
554
555 static void add_device(SLMP_INFO *info);
556 static void device_init(int adapter_num, struct pci_dev *pdev);
557 static int claim_resources(SLMP_INFO *info);
558 static void release_resources(SLMP_INFO *info);
559
560 static int startup(SLMP_INFO *info);
561 static int block_til_ready(struct tty_struct *tty, struct file * filp,SLMP_INFO *info);
562 static int carrier_raised(struct tty_port *port);
563 static void shutdown(SLMP_INFO *info);
564 static void program_hw(SLMP_INFO *info);
565 static void change_params(SLMP_INFO *info);
566
567 static bool init_adapter(SLMP_INFO *info);
568 static bool register_test(SLMP_INFO *info);
569 static bool irq_test(SLMP_INFO *info);
570 static bool loopback_test(SLMP_INFO *info);
571 static int adapter_test(SLMP_INFO *info);
572 static bool memory_test(SLMP_INFO *info);
573
574 static void reset_adapter(SLMP_INFO *info);
575 static void reset_port(SLMP_INFO *info);
576 static void async_mode(SLMP_INFO *info);
577 static void hdlc_mode(SLMP_INFO *info);
578
579 static void rx_stop(SLMP_INFO *info);
580 static void rx_start(SLMP_INFO *info);
581 static void rx_reset_buffers(SLMP_INFO *info);
582 static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last);
583 static bool rx_get_frame(SLMP_INFO *info);
584
585 static void tx_start(SLMP_INFO *info);
586 static void tx_stop(SLMP_INFO *info);
587 static void tx_load_fifo(SLMP_INFO *info);
588 static void tx_set_idle(SLMP_INFO *info);
589 static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count);
590
591 static void get_signals(SLMP_INFO *info);
592 static void set_signals(SLMP_INFO *info);
593 static void enable_loopback(SLMP_INFO *info, int enable);
594 static void set_rate(SLMP_INFO *info, u32 data_rate);
595
596 static int bh_action(SLMP_INFO *info);
597 static void bh_handler(struct work_struct *work);
598 static void bh_receive(SLMP_INFO *info);
599 static void bh_transmit(SLMP_INFO *info);
600 static void bh_status(SLMP_INFO *info);
601 static void isr_timer(SLMP_INFO *info);
602 static void isr_rxint(SLMP_INFO *info);
603 static void isr_rxrdy(SLMP_INFO *info);
604 static void isr_txint(SLMP_INFO *info);
605 static void isr_txrdy(SLMP_INFO *info);
606 static void isr_rxdmaok(SLMP_INFO *info);
607 static void isr_rxdmaerror(SLMP_INFO *info);
608 static void isr_txdmaok(SLMP_INFO *info);
609 static void isr_txdmaerror(SLMP_INFO *info);
610 static void isr_io_pin(SLMP_INFO *info, u16 status);
611
612 static int alloc_dma_bufs(SLMP_INFO *info);
613 static void free_dma_bufs(SLMP_INFO *info);
614 static int alloc_buf_list(SLMP_INFO *info);
615 static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *list, SCADESC_EX *list_ex,int count);
616 static int alloc_tmp_rx_buf(SLMP_INFO *info);
617 static void free_tmp_rx_buf(SLMP_INFO *info);
618
619 static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count);
620 static void trace_block(SLMP_INFO *info, const char* data, int count, int xmit);
621 static void tx_timeout(unsigned long context);
622 static void status_timeout(unsigned long context);
623
624 static unsigned char read_reg(SLMP_INFO *info, unsigned char addr);
625 static void write_reg(SLMP_INFO *info, unsigned char addr, unsigned char val);
626 static u16 read_reg16(SLMP_INFO *info, unsigned char addr);
627 static void write_reg16(SLMP_INFO *info, unsigned char addr, u16 val);
628 static unsigned char read_status_reg(SLMP_INFO * info);
629 static void write_control_reg(SLMP_INFO * info);
630
631
632 static unsigned char rx_active_fifo_level = 16; // rx request FIFO activation level in bytes
633 static unsigned char tx_active_fifo_level = 16; // tx request FIFO activation level in bytes
634 static unsigned char tx_negate_fifo_level = 32; // tx request FIFO negation level in bytes
635
636 static u32 misc_ctrl_value = 0x007e4040;
637 static u32 lcr1_brdr_value = 0x00800028;
638
639 static u32 read_ahead_count = 8;
640
641 /* DPCR, DMA Priority Control
642 *
643 * 07..05 Not used, must be 0
644 * 04 BRC, bus release condition: 0=all transfers complete
645 * 1=release after 1 xfer on all channels
646 * 03 CCC, channel change condition: 0=every cycle
647 * 1=after each channel completes all xfers
648 * 02..00 PR<2..0>, priority 100=round robin
649 *
650 * 00000100 = 0x00
651 */
652 static unsigned char dma_priority = 0x04;
653
654 // Number of bytes that can be written to shared RAM
655 // in a single write operation
656 static u32 sca_pci_load_interval = 64;
657
658 /*
659 * 1st function defined in .text section. Calling this function in
660 * init_module() followed by a breakpoint allows a remote debugger
661 * (gdb) to get the .text address for the add-symbol-file command.
662 * This allows remote debugging of dynamically loadable modules.
663 */
664 static void* synclinkmp_get_text_ptr(void);
665 static void* synclinkmp_get_text_ptr(void) {return synclinkmp_get_text_ptr;}
666
667 static inline int sanity_check(SLMP_INFO *info,
668 char *name, const char *routine)
669 {
670 #ifdef SANITY_CHECK
671 static const char *badmagic =
672 "Warning: bad magic number for synclinkmp_struct (%s) in %s\n";
673 static const char *badinfo =
674 "Warning: null synclinkmp_struct for (%s) in %s\n";
675
676 if (!info) {
677 printk(badinfo, name, routine);
678 return 1;
679 }
680 if (info->magic != MGSL_MAGIC) {
681 printk(badmagic, name, routine);
682 return 1;
683 }
684 #else
685 if (!info)
686 return 1;
687 #endif
688 return 0;
689 }
690
691 /**
692 * line discipline callback wrappers
693 *
694 * The wrappers maintain line discipline references
695 * while calling into the line discipline.
696 *
697 * ldisc_receive_buf - pass receive data to line discipline
698 */
699
700 static void ldisc_receive_buf(struct tty_struct *tty,
701 const __u8 *data, char *flags, int count)
702 {
703 struct tty_ldisc *ld;
704 if (!tty)
705 return;
706 ld = tty_ldisc_ref(tty);
707 if (ld) {
708 if (ld->ops->receive_buf)
709 ld->ops->receive_buf(tty, data, flags, count);
710 tty_ldisc_deref(ld);
711 }
712 }
713
714 /* tty callbacks */
715
716 /* Called when a port is opened. Init and enable port.
717 */
718 static int open(struct tty_struct *tty, struct file *filp)
719 {
720 SLMP_INFO *info;
721 int retval, line;
722 unsigned long flags;
723
724 line = tty->index;
725 if ((line < 0) || (line >= synclinkmp_device_count)) {
726 printk("%s(%d): open with invalid line #%d.\n",
727 __FILE__,__LINE__,line);
728 return -ENODEV;
729 }
730
731 info = synclinkmp_device_list;
732 while(info && info->line != line)
733 info = info->next_device;
734 if (sanity_check(info, tty->name, "open"))
735 return -ENODEV;
736 if ( info->init_error ) {
737 printk("%s(%d):%s device is not allocated, init error=%d\n",
738 __FILE__,__LINE__,info->device_name,info->init_error);
739 return -ENODEV;
740 }
741
742 tty->driver_data = info;
743 info->port.tty = tty;
744
745 if (debug_level >= DEBUG_LEVEL_INFO)
746 printk("%s(%d):%s open(), old ref count = %d\n",
747 __FILE__,__LINE__,tty->driver->name, info->port.count);
748
749 /* If port is closing, signal caller to try again */
750 if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){
751 if (info->port.flags & ASYNC_CLOSING)
752 interruptible_sleep_on(&info->port.close_wait);
753 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
754 -EAGAIN : -ERESTARTSYS);
755 goto cleanup;
756 }
757
758 info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
759
760 spin_lock_irqsave(&info->netlock, flags);
761 if (info->netcount) {
762 retval = -EBUSY;
763 spin_unlock_irqrestore(&info->netlock, flags);
764 goto cleanup;
765 }
766 info->port.count++;
767 spin_unlock_irqrestore(&info->netlock, flags);
768
769 if (info->port.count == 1) {
770 /* 1st open on this device, init hardware */
771 retval = startup(info);
772 if (retval < 0)
773 goto cleanup;
774 }
775
776 retval = block_til_ready(tty, filp, info);
777 if (retval) {
778 if (debug_level >= DEBUG_LEVEL_INFO)
779 printk("%s(%d):%s block_til_ready() returned %d\n",
780 __FILE__,__LINE__, info->device_name, retval);
781 goto cleanup;
782 }
783
784 if (debug_level >= DEBUG_LEVEL_INFO)
785 printk("%s(%d):%s open() success\n",
786 __FILE__,__LINE__, info->device_name);
787 retval = 0;
788
789 cleanup:
790 if (retval) {
791 if (tty->count == 1)
792 info->port.tty = NULL; /* tty layer will release tty struct */
793 if(info->port.count)
794 info->port.count--;
795 }
796
797 return retval;
798 }
799
800 /* Called when port is closed. Wait for remaining data to be
801 * sent. Disable port and free resources.
802 */
803 static void close(struct tty_struct *tty, struct file *filp)
804 {
805 SLMP_INFO * info = tty->driver_data;
806
807 if (sanity_check(info, tty->name, "close"))
808 return;
809
810 if (debug_level >= DEBUG_LEVEL_INFO)
811 printk("%s(%d):%s close() entry, count=%d\n",
812 __FILE__,__LINE__, info->device_name, info->port.count);
813
814 if (tty_port_close_start(&info->port, tty, filp) == 0)
815 goto cleanup;
816
817 if (info->port.flags & ASYNC_INITIALIZED)
818 wait_until_sent(tty, info->timeout);
819
820 flush_buffer(tty);
821 tty_ldisc_flush(tty);
822 shutdown(info);
823
824 tty_port_close_end(&info->port, tty);
825 info->port.tty = NULL;
826 cleanup:
827 if (debug_level >= DEBUG_LEVEL_INFO)
828 printk("%s(%d):%s close() exit, count=%d\n", __FILE__,__LINE__,
829 tty->driver->name, info->port.count);
830 }
831
832 /* Called by tty_hangup() when a hangup is signaled.
833 * This is the same as closing all open descriptors for the port.
834 */
835 static void hangup(struct tty_struct *tty)
836 {
837 SLMP_INFO *info = tty->driver_data;
838
839 if (debug_level >= DEBUG_LEVEL_INFO)
840 printk("%s(%d):%s hangup()\n",
841 __FILE__,__LINE__, info->device_name );
842
843 if (sanity_check(info, tty->name, "hangup"))
844 return;
845
846 flush_buffer(tty);
847 shutdown(info);
848
849 info->port.count = 0;
850 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
851 info->port.tty = NULL;
852
853 wake_up_interruptible(&info->port.open_wait);
854 }
855
856 /* Set new termios settings
857 */
858 static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
859 {
860 SLMP_INFO *info = tty->driver_data;
861 unsigned long flags;
862
863 if (debug_level >= DEBUG_LEVEL_INFO)
864 printk("%s(%d):%s set_termios()\n", __FILE__,__LINE__,
865 tty->driver->name );
866
867 change_params(info);
868
869 /* Handle transition to B0 status */
870 if (old_termios->c_cflag & CBAUD &&
871 !(tty->termios->c_cflag & CBAUD)) {
872 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
873 spin_lock_irqsave(&info->lock,flags);
874 set_signals(info);
875 spin_unlock_irqrestore(&info->lock,flags);
876 }
877
878 /* Handle transition away from B0 status */
879 if (!(old_termios->c_cflag & CBAUD) &&
880 tty->termios->c_cflag & CBAUD) {
881 info->serial_signals |= SerialSignal_DTR;
882 if (!(tty->termios->c_cflag & CRTSCTS) ||
883 !test_bit(TTY_THROTTLED, &tty->flags)) {
884 info->serial_signals |= SerialSignal_RTS;
885 }
886 spin_lock_irqsave(&info->lock,flags);
887 set_signals(info);
888 spin_unlock_irqrestore(&info->lock,flags);
889 }
890
891 /* Handle turning off CRTSCTS */
892 if (old_termios->c_cflag & CRTSCTS &&
893 !(tty->termios->c_cflag & CRTSCTS)) {
894 tty->hw_stopped = 0;
895 tx_release(tty);
896 }
897 }
898
899 /* Send a block of data
900 *
901 * Arguments:
902 *
903 * tty pointer to tty information structure
904 * buf pointer to buffer containing send data
905 * count size of send data in bytes
906 *
907 * Return Value: number of characters written
908 */
909 static int write(struct tty_struct *tty,
910 const unsigned char *buf, int count)
911 {
912 int c, ret = 0;
913 SLMP_INFO *info = tty->driver_data;
914 unsigned long flags;
915
916 if (debug_level >= DEBUG_LEVEL_INFO)
917 printk("%s(%d):%s write() count=%d\n",
918 __FILE__,__LINE__,info->device_name,count);
919
920 if (sanity_check(info, tty->name, "write"))
921 goto cleanup;
922
923 if (!info->tx_buf)
924 goto cleanup;
925
926 if (info->params.mode == MGSL_MODE_HDLC) {
927 if (count > info->max_frame_size) {
928 ret = -EIO;
929 goto cleanup;
930 }
931 if (info->tx_active)
932 goto cleanup;
933 if (info->tx_count) {
934 /* send accumulated data from send_char() calls */
935 /* as frame and wait before accepting more data. */
936 tx_load_dma_buffer(info, info->tx_buf, info->tx_count);
937 goto start;
938 }
939 ret = info->tx_count = count;
940 tx_load_dma_buffer(info, buf, count);
941 goto start;
942 }
943
944 for (;;) {
945 c = min_t(int, count,
946 min(info->max_frame_size - info->tx_count - 1,
947 info->max_frame_size - info->tx_put));
948 if (c <= 0)
949 break;
950
951 memcpy(info->tx_buf + info->tx_put, buf, c);
952
953 spin_lock_irqsave(&info->lock,flags);
954 info->tx_put += c;
955 if (info->tx_put >= info->max_frame_size)
956 info->tx_put -= info->max_frame_size;
957 info->tx_count += c;
958 spin_unlock_irqrestore(&info->lock,flags);
959
960 buf += c;
961 count -= c;
962 ret += c;
963 }
964
965 if (info->params.mode == MGSL_MODE_HDLC) {
966 if (count) {
967 ret = info->tx_count = 0;
968 goto cleanup;
969 }
970 tx_load_dma_buffer(info, info->tx_buf, info->tx_count);
971 }
972 start:
973 if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
974 spin_lock_irqsave(&info->lock,flags);
975 if (!info->tx_active)
976 tx_start(info);
977 spin_unlock_irqrestore(&info->lock,flags);
978 }
979
980 cleanup:
981 if (debug_level >= DEBUG_LEVEL_INFO)
982 printk( "%s(%d):%s write() returning=%d\n",
983 __FILE__,__LINE__,info->device_name,ret);
984 return ret;
985 }
986
987 /* Add a character to the transmit buffer.
988 */
989 static int put_char(struct tty_struct *tty, unsigned char ch)
990 {
991 SLMP_INFO *info = tty->driver_data;
992 unsigned long flags;
993 int ret = 0;
994
995 if ( debug_level >= DEBUG_LEVEL_INFO ) {
996 printk( "%s(%d):%s put_char(%d)\n",
997 __FILE__,__LINE__,info->device_name,ch);
998 }
999
1000 if (sanity_check(info, tty->name, "put_char"))
1001 return 0;
1002
1003 if (!info->tx_buf)
1004 return 0;
1005
1006 spin_lock_irqsave(&info->lock,flags);
1007
1008 if ( (info->params.mode != MGSL_MODE_HDLC) ||
1009 !info->tx_active ) {
1010
1011 if (info->tx_count < info->max_frame_size - 1) {
1012 info->tx_buf[info->tx_put++] = ch;
1013 if (info->tx_put >= info->max_frame_size)
1014 info->tx_put -= info->max_frame_size;
1015 info->tx_count++;
1016 ret = 1;
1017 }
1018 }
1019
1020 spin_unlock_irqrestore(&info->lock,flags);
1021 return ret;
1022 }
1023
1024 /* Send a high-priority XON/XOFF character
1025 */
1026 static void send_xchar(struct tty_struct *tty, char ch)
1027 {
1028 SLMP_INFO *info = tty->driver_data;
1029 unsigned long flags;
1030
1031 if (debug_level >= DEBUG_LEVEL_INFO)
1032 printk("%s(%d):%s send_xchar(%d)\n",
1033 __FILE__,__LINE__, info->device_name, ch );
1034
1035 if (sanity_check(info, tty->name, "send_xchar"))
1036 return;
1037
1038 info->x_char = ch;
1039 if (ch) {
1040 /* Make sure transmit interrupts are on */
1041 spin_lock_irqsave(&info->lock,flags);
1042 if (!info->tx_enabled)
1043 tx_start(info);
1044 spin_unlock_irqrestore(&info->lock,flags);
1045 }
1046 }
1047
1048 /* Wait until the transmitter is empty.
1049 */
1050 static void wait_until_sent(struct tty_struct *tty, int timeout)
1051 {
1052 SLMP_INFO * info = tty->driver_data;
1053 unsigned long orig_jiffies, char_time;
1054
1055 if (!info )
1056 return;
1057
1058 if (debug_level >= DEBUG_LEVEL_INFO)
1059 printk("%s(%d):%s wait_until_sent() entry\n",
1060 __FILE__,__LINE__, info->device_name );
1061
1062 if (sanity_check(info, tty->name, "wait_until_sent"))
1063 return;
1064
1065 lock_kernel();
1066
1067 if (!(info->port.flags & ASYNC_INITIALIZED))
1068 goto exit;
1069
1070 orig_jiffies = jiffies;
1071
1072 /* Set check interval to 1/5 of estimated time to
1073 * send a character, and make it at least 1. The check
1074 * interval should also be less than the timeout.
1075 * Note: use tight timings here to satisfy the NIST-PCTS.
1076 */
1077
1078 if ( info->params.data_rate ) {
1079 char_time = info->timeout/(32 * 5);
1080 if (!char_time)
1081 char_time++;
1082 } else
1083 char_time = 1;
1084
1085 if (timeout)
1086 char_time = min_t(unsigned long, char_time, timeout);
1087
1088 if ( info->params.mode == MGSL_MODE_HDLC ) {
1089 while (info->tx_active) {
1090 msleep_interruptible(jiffies_to_msecs(char_time));
1091 if (signal_pending(current))
1092 break;
1093 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1094 break;
1095 }
1096 } else {
1097 //TODO: determine if there is something similar to USC16C32
1098 // TXSTATUS_ALL_SENT status
1099 while ( info->tx_active && info->tx_enabled) {
1100 msleep_interruptible(jiffies_to_msecs(char_time));
1101 if (signal_pending(current))
1102 break;
1103 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1104 break;
1105 }
1106 }
1107
1108 exit:
1109 unlock_kernel();
1110 if (debug_level >= DEBUG_LEVEL_INFO)
1111 printk("%s(%d):%s wait_until_sent() exit\n",
1112 __FILE__,__LINE__, info->device_name );
1113 }
1114
1115 /* Return the count of free bytes in transmit buffer
1116 */
1117 static int write_room(struct tty_struct *tty)
1118 {
1119 SLMP_INFO *info = tty->driver_data;
1120 int ret;
1121
1122 if (sanity_check(info, tty->name, "write_room"))
1123 return 0;
1124
1125 lock_kernel();
1126 if (info->params.mode == MGSL_MODE_HDLC) {
1127 ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE;
1128 } else {
1129 ret = info->max_frame_size - info->tx_count - 1;
1130 if (ret < 0)
1131 ret = 0;
1132 }
1133 unlock_kernel();
1134
1135 if (debug_level >= DEBUG_LEVEL_INFO)
1136 printk("%s(%d):%s write_room()=%d\n",
1137 __FILE__, __LINE__, info->device_name, ret);
1138
1139 return ret;
1140 }
1141
1142 /* enable transmitter and send remaining buffered characters
1143 */
1144 static void flush_chars(struct tty_struct *tty)
1145 {
1146 SLMP_INFO *info = tty->driver_data;
1147 unsigned long flags;
1148
1149 if ( debug_level >= DEBUG_LEVEL_INFO )
1150 printk( "%s(%d):%s flush_chars() entry tx_count=%d\n",
1151 __FILE__,__LINE__,info->device_name,info->tx_count);
1152
1153 if (sanity_check(info, tty->name, "flush_chars"))
1154 return;
1155
1156 if (info->tx_count <= 0 || tty->stopped || tty->hw_stopped ||
1157 !info->tx_buf)
1158 return;
1159
1160 if ( debug_level >= DEBUG_LEVEL_INFO )
1161 printk( "%s(%d):%s flush_chars() entry, starting transmitter\n",
1162 __FILE__,__LINE__,info->device_name );
1163
1164 spin_lock_irqsave(&info->lock,flags);
1165
1166 if (!info->tx_active) {
1167 if ( (info->params.mode == MGSL_MODE_HDLC) &&
1168 info->tx_count ) {
1169 /* operating in synchronous (frame oriented) mode */
1170 /* copy data from circular tx_buf to */
1171 /* transmit DMA buffer. */
1172 tx_load_dma_buffer(info,
1173 info->tx_buf,info->tx_count);
1174 }
1175 tx_start(info);
1176 }
1177
1178 spin_unlock_irqrestore(&info->lock,flags);
1179 }
1180
1181 /* Discard all data in the send buffer
1182 */
1183 static void flush_buffer(struct tty_struct *tty)
1184 {
1185 SLMP_INFO *info = tty->driver_data;
1186 unsigned long flags;
1187
1188 if (debug_level >= DEBUG_LEVEL_INFO)
1189 printk("%s(%d):%s flush_buffer() entry\n",
1190 __FILE__,__LINE__, info->device_name );
1191
1192 if (sanity_check(info, tty->name, "flush_buffer"))
1193 return;
1194
1195 spin_lock_irqsave(&info->lock,flags);
1196 info->tx_count = info->tx_put = info->tx_get = 0;
1197 del_timer(&info->tx_timer);
1198 spin_unlock_irqrestore(&info->lock,flags);
1199
1200 tty_wakeup(tty);
1201 }
1202
1203 /* throttle (stop) transmitter
1204 */
1205 static void tx_hold(struct tty_struct *tty)
1206 {
1207 SLMP_INFO *info = tty->driver_data;
1208 unsigned long flags;
1209
1210 if (sanity_check(info, tty->name, "tx_hold"))
1211 return;
1212
1213 if ( debug_level >= DEBUG_LEVEL_INFO )
1214 printk("%s(%d):%s tx_hold()\n",
1215 __FILE__,__LINE__,info->device_name);
1216
1217 spin_lock_irqsave(&info->lock,flags);
1218 if (info->tx_enabled)
1219 tx_stop(info);
1220 spin_unlock_irqrestore(&info->lock,flags);
1221 }
1222
1223 /* release (start) transmitter
1224 */
1225 static void tx_release(struct tty_struct *tty)
1226 {
1227 SLMP_INFO *info = tty->driver_data;
1228 unsigned long flags;
1229
1230 if (sanity_check(info, tty->name, "tx_release"))
1231 return;
1232
1233 if ( debug_level >= DEBUG_LEVEL_INFO )
1234 printk("%s(%d):%s tx_release()\n",
1235 __FILE__,__LINE__,info->device_name);
1236
1237 spin_lock_irqsave(&info->lock,flags);
1238 if (!info->tx_enabled)
1239 tx_start(info);
1240 spin_unlock_irqrestore(&info->lock,flags);
1241 }
1242
1243 /* Service an IOCTL request
1244 *
1245 * Arguments:
1246 *
1247 * tty pointer to tty instance data
1248 * file pointer to associated file object for device
1249 * cmd IOCTL command code
1250 * arg command argument/context
1251 *
1252 * Return Value: 0 if success, otherwise error code
1253 */
1254 static int do_ioctl(struct tty_struct *tty, struct file *file,
1255 unsigned int cmd, unsigned long arg)
1256 {
1257 SLMP_INFO *info = tty->driver_data;
1258 int error;
1259 struct mgsl_icount cnow; /* kernel counter temps */
1260 struct serial_icounter_struct __user *p_cuser; /* user space */
1261 unsigned long flags;
1262 void __user *argp = (void __user *)arg;
1263
1264 if (debug_level >= DEBUG_LEVEL_INFO)
1265 printk("%s(%d):%s ioctl() cmd=%08X\n", __FILE__,__LINE__,
1266 info->device_name, cmd );
1267
1268 if (sanity_check(info, tty->name, "ioctl"))
1269 return -ENODEV;
1270
1271 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1272 (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1273 if (tty->flags & (1 << TTY_IO_ERROR))
1274 return -EIO;
1275 }
1276
1277 switch (cmd) {
1278 case MGSL_IOCGPARAMS:
1279 return get_params(info, argp);
1280 case MGSL_IOCSPARAMS:
1281 return set_params(info, argp);
1282 case MGSL_IOCGTXIDLE:
1283 return get_txidle(info, argp);
1284 case MGSL_IOCSTXIDLE:
1285 return set_txidle(info, (int)arg);
1286 case MGSL_IOCTXENABLE:
1287 return tx_enable(info, (int)arg);
1288 case MGSL_IOCRXENABLE:
1289 return rx_enable(info, (int)arg);
1290 case MGSL_IOCTXABORT:
1291 return tx_abort(info);
1292 case MGSL_IOCGSTATS:
1293 return get_stats(info, argp);
1294 case MGSL_IOCWAITEVENT:
1295 return wait_mgsl_event(info, argp);
1296 case MGSL_IOCLOOPTXDONE:
1297 return 0; // TODO: Not supported, need to document
1298 /* Wait for modem input (DCD,RI,DSR,CTS) change
1299 * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS)
1300 */
1301 case TIOCMIWAIT:
1302 return modem_input_wait(info,(int)arg);
1303
1304 /*
1305 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1306 * Return: write counters to the user passed counter struct
1307 * NB: both 1->0 and 0->1 transitions are counted except for
1308 * RI where only 0->1 is counted.
1309 */
1310 case TIOCGICOUNT:
1311 spin_lock_irqsave(&info->lock,flags);
1312 cnow = info->icount;
1313 spin_unlock_irqrestore(&info->lock,flags);
1314 p_cuser = argp;
1315 PUT_USER(error,cnow.cts, &p_cuser->cts);
1316 if (error) return error;
1317 PUT_USER(error,cnow.dsr, &p_cuser->dsr);
1318 if (error) return error;
1319 PUT_USER(error,cnow.rng, &p_cuser->rng);
1320 if (error) return error;
1321 PUT_USER(error,cnow.dcd, &p_cuser->dcd);
1322 if (error) return error;
1323 PUT_USER(error,cnow.rx, &p_cuser->rx);
1324 if (error) return error;
1325 PUT_USER(error,cnow.tx, &p_cuser->tx);
1326 if (error) return error;
1327 PUT_USER(error,cnow.frame, &p_cuser->frame);
1328 if (error) return error;
1329 PUT_USER(error,cnow.overrun, &p_cuser->overrun);
1330 if (error) return error;
1331 PUT_USER(error,cnow.parity, &p_cuser->parity);
1332 if (error) return error;
1333 PUT_USER(error,cnow.brk, &p_cuser->brk);
1334 if (error) return error;
1335 PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun);
1336 if (error) return error;
1337 return 0;
1338 default:
1339 return -ENOIOCTLCMD;
1340 }
1341 return 0;
1342 }
1343
1344 static int ioctl(struct tty_struct *tty, struct file *file,
1345 unsigned int cmd, unsigned long arg)
1346 {
1347 int ret;
1348 lock_kernel();
1349 ret = do_ioctl(tty, file, cmd, arg);
1350 unlock_kernel();
1351 return ret;
1352 }
1353
1354 /*
1355 * /proc fs routines....
1356 */
1357
1358 static inline void line_info(struct seq_file *m, SLMP_INFO *info)
1359 {
1360 char stat_buf[30];
1361 unsigned long flags;
1362
1363 seq_printf(m, "%s: SCABase=%08x Mem=%08X StatusControl=%08x LCR=%08X\n"
1364 "\tIRQ=%d MaxFrameSize=%u\n",
1365 info->device_name,
1366 info->phys_sca_base,
1367 info->phys_memory_base,
1368 info->phys_statctrl_base,
1369 info->phys_lcr_base,
1370 info->irq_level,
1371 info->max_frame_size );
1372
1373 /* output current serial signal states */
1374 spin_lock_irqsave(&info->lock,flags);
1375 get_signals(info);
1376 spin_unlock_irqrestore(&info->lock,flags);
1377
1378 stat_buf[0] = 0;
1379 stat_buf[1] = 0;
1380 if (info->serial_signals & SerialSignal_RTS)
1381 strcat(stat_buf, "|RTS");
1382 if (info->serial_signals & SerialSignal_CTS)
1383 strcat(stat_buf, "|CTS");
1384 if (info->serial_signals & SerialSignal_DTR)
1385 strcat(stat_buf, "|DTR");
1386 if (info->serial_signals & SerialSignal_DSR)
1387 strcat(stat_buf, "|DSR");
1388 if (info->serial_signals & SerialSignal_DCD)
1389 strcat(stat_buf, "|CD");
1390 if (info->serial_signals & SerialSignal_RI)
1391 strcat(stat_buf, "|RI");
1392
1393 if (info->params.mode == MGSL_MODE_HDLC) {
1394 seq_printf(m, "\tHDLC txok:%d rxok:%d",
1395 info->icount.txok, info->icount.rxok);
1396 if (info->icount.txunder)
1397 seq_printf(m, " txunder:%d", info->icount.txunder);
1398 if (info->icount.txabort)
1399 seq_printf(m, " txabort:%d", info->icount.txabort);
1400 if (info->icount.rxshort)
1401 seq_printf(m, " rxshort:%d", info->icount.rxshort);
1402 if (info->icount.rxlong)
1403 seq_printf(m, " rxlong:%d", info->icount.rxlong);
1404 if (info->icount.rxover)
1405 seq_printf(m, " rxover:%d", info->icount.rxover);
1406 if (info->icount.rxcrc)
1407 seq_printf(m, " rxlong:%d", info->icount.rxcrc);
1408 } else {
1409 seq_printf(m, "\tASYNC tx:%d rx:%d",
1410 info->icount.tx, info->icount.rx);
1411 if (info->icount.frame)
1412 seq_printf(m, " fe:%d", info->icount.frame);
1413 if (info->icount.parity)
1414 seq_printf(m, " pe:%d", info->icount.parity);
1415 if (info->icount.brk)
1416 seq_printf(m, " brk:%d", info->icount.brk);
1417 if (info->icount.overrun)
1418 seq_printf(m, " oe:%d", info->icount.overrun);
1419 }
1420
1421 /* Append serial signal status to end */
1422 seq_printf(m, " %s\n", stat_buf+1);
1423
1424 seq_printf(m, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
1425 info->tx_active,info->bh_requested,info->bh_running,
1426 info->pending_bh);
1427 }
1428
1429 /* Called to print information about devices
1430 */
1431 static int synclinkmp_proc_show(struct seq_file *m, void *v)
1432 {
1433 SLMP_INFO *info;
1434
1435 seq_printf(m, "synclinkmp driver:%s\n", driver_version);
1436
1437 info = synclinkmp_device_list;
1438 while( info ) {
1439 line_info(m, info);
1440 info = info->next_device;
1441 }
1442 return 0;
1443 }
1444
1445 static int synclinkmp_proc_open(struct inode *inode, struct file *file)
1446 {
1447 return single_open(file, synclinkmp_proc_show, NULL);
1448 }
1449
1450 static const struct file_operations synclinkmp_proc_fops = {
1451 .owner = THIS_MODULE,
1452 .open = synclinkmp_proc_open,
1453 .read = seq_read,
1454 .llseek = seq_lseek,
1455 .release = single_release,
1456 };
1457
1458 /* Return the count of bytes in transmit buffer
1459 */
1460 static int chars_in_buffer(struct tty_struct *tty)
1461 {
1462 SLMP_INFO *info = tty->driver_data;
1463
1464 if (sanity_check(info, tty->name, "chars_in_buffer"))
1465 return 0;
1466
1467 if (debug_level >= DEBUG_LEVEL_INFO)
1468 printk("%s(%d):%s chars_in_buffer()=%d\n",
1469 __FILE__, __LINE__, info->device_name, info->tx_count);
1470
1471 return info->tx_count;
1472 }
1473
1474 /* Signal remote device to throttle send data (our receive data)
1475 */
1476 static void throttle(struct tty_struct * tty)
1477 {
1478 SLMP_INFO *info = tty->driver_data;
1479 unsigned long flags;
1480
1481 if (debug_level >= DEBUG_LEVEL_INFO)
1482 printk("%s(%d):%s throttle() entry\n",
1483 __FILE__,__LINE__, info->device_name );
1484
1485 if (sanity_check(info, tty->name, "throttle"))
1486 return;
1487
1488 if (I_IXOFF(tty))
1489 send_xchar(tty, STOP_CHAR(tty));
1490
1491 if (tty->termios->c_cflag & CRTSCTS) {
1492 spin_lock_irqsave(&info->lock,flags);
1493 info->serial_signals &= ~SerialSignal_RTS;
1494 set_signals(info);
1495 spin_unlock_irqrestore(&info->lock,flags);
1496 }
1497 }
1498
1499 /* Signal remote device to stop throttling send data (our receive data)
1500 */
1501 static void unthrottle(struct tty_struct * tty)
1502 {
1503 SLMP_INFO *info = tty->driver_data;
1504 unsigned long flags;
1505
1506 if (debug_level >= DEBUG_LEVEL_INFO)
1507 printk("%s(%d):%s unthrottle() entry\n",
1508 __FILE__,__LINE__, info->device_name );
1509
1510 if (sanity_check(info, tty->name, "unthrottle"))
1511 return;
1512
1513 if (I_IXOFF(tty)) {
1514 if (info->x_char)
1515 info->x_char = 0;
1516 else
1517 send_xchar(tty, START_CHAR(tty));
1518 }
1519
1520 if (tty->termios->c_cflag & CRTSCTS) {
1521 spin_lock_irqsave(&info->lock,flags);
1522 info->serial_signals |= SerialSignal_RTS;
1523 set_signals(info);
1524 spin_unlock_irqrestore(&info->lock,flags);
1525 }
1526 }
1527
1528 /* set or clear transmit break condition
1529 * break_state -1=set break condition, 0=clear
1530 */
1531 static int set_break(struct tty_struct *tty, int break_state)
1532 {
1533 unsigned char RegValue;
1534 SLMP_INFO * info = tty->driver_data;
1535 unsigned long flags;
1536
1537 if (debug_level >= DEBUG_LEVEL_INFO)
1538 printk("%s(%d):%s set_break(%d)\n",
1539 __FILE__,__LINE__, info->device_name, break_state);
1540
1541 if (sanity_check(info, tty->name, "set_break"))
1542 return -EINVAL;
1543
1544 spin_lock_irqsave(&info->lock,flags);
1545 RegValue = read_reg(info, CTL);
1546 if (break_state == -1)
1547 RegValue |= BIT3;
1548 else
1549 RegValue &= ~BIT3;
1550 write_reg(info, CTL, RegValue);
1551 spin_unlock_irqrestore(&info->lock,flags);
1552 return 0;
1553 }
1554
1555 #if SYNCLINK_GENERIC_HDLC
1556
1557 /**
1558 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
1559 * set encoding and frame check sequence (FCS) options
1560 *
1561 * dev pointer to network device structure
1562 * encoding serial encoding setting
1563 * parity FCS setting
1564 *
1565 * returns 0 if success, otherwise error code
1566 */
1567 static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
1568 unsigned short parity)
1569 {
1570 SLMP_INFO *info = dev_to_port(dev);
1571 unsigned char new_encoding;
1572 unsigned short new_crctype;
1573
1574 /* return error if TTY interface open */
1575 if (info->port.count)
1576 return -EBUSY;
1577
1578 switch (encoding)
1579 {
1580 case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
1581 case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
1582 case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
1583 case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
1584 case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
1585 default: return -EINVAL;
1586 }
1587
1588 switch (parity)
1589 {
1590 case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
1591 case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
1592 case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
1593 default: return -EINVAL;
1594 }
1595
1596 info->params.encoding = new_encoding;
1597 info->params.crc_type = new_crctype;
1598
1599 /* if network interface up, reprogram hardware */
1600 if (info->netcount)
1601 program_hw(info);
1602
1603 return 0;
1604 }
1605
1606 /**
1607 * called by generic HDLC layer to send frame
1608 *
1609 * skb socket buffer containing HDLC frame
1610 * dev pointer to network device structure
1611 */
1612 static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
1613 struct net_device *dev)
1614 {
1615 SLMP_INFO *info = dev_to_port(dev);
1616 unsigned long flags;
1617
1618 if (debug_level >= DEBUG_LEVEL_INFO)
1619 printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
1620
1621 /* stop sending until this frame completes */
1622 netif_stop_queue(dev);
1623
1624 /* copy data to device buffers */
1625 info->tx_count = skb->len;
1626 tx_load_dma_buffer(info, skb->data, skb->len);
1627
1628 /* update network statistics */
1629 dev->stats.tx_packets++;
1630 dev->stats.tx_bytes += skb->len;
1631
1632 /* done with socket buffer, so free it */
1633 dev_kfree_skb(skb);
1634
1635 /* save start time for transmit timeout detection */
1636 dev->trans_start = jiffies;
1637
1638 /* start hardware transmitter if necessary */
1639 spin_lock_irqsave(&info->lock,flags);
1640 if (!info->tx_active)
1641 tx_start(info);
1642 spin_unlock_irqrestore(&info->lock,flags);
1643
1644 return NETDEV_TX_OK;
1645 }
1646
1647 /**
1648 * called by network layer when interface enabled
1649 * claim resources and initialize hardware
1650 *
1651 * dev pointer to network device structure
1652 *
1653 * returns 0 if success, otherwise error code
1654 */
1655 static int hdlcdev_open(struct net_device *dev)
1656 {
1657 SLMP_INFO *info = dev_to_port(dev);
1658 int rc;
1659 unsigned long flags;
1660
1661 if (debug_level >= DEBUG_LEVEL_INFO)
1662 printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
1663
1664 /* generic HDLC layer open processing */
1665 if ((rc = hdlc_open(dev)))
1666 return rc;
1667
1668 /* arbitrate between network and tty opens */
1669 spin_lock_irqsave(&info->netlock, flags);
1670 if (info->port.count != 0 || info->netcount != 0) {
1671 printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
1672 spin_unlock_irqrestore(&info->netlock, flags);
1673 return -EBUSY;
1674 }
1675 info->netcount=1;
1676 spin_unlock_irqrestore(&info->netlock, flags);
1677
1678 /* claim resources and init adapter */
1679 if ((rc = startup(info)) != 0) {
1680 spin_lock_irqsave(&info->netlock, flags);
1681 info->netcount=0;
1682 spin_unlock_irqrestore(&info->netlock, flags);
1683 return rc;
1684 }
1685
1686 /* assert DTR and RTS, apply hardware settings */
1687 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
1688 program_hw(info);
1689
1690 /* enable network layer transmit */
1691 dev->trans_start = jiffies;
1692 netif_start_queue(dev);
1693
1694 /* inform generic HDLC layer of current DCD status */
1695 spin_lock_irqsave(&info->lock, flags);
1696 get_signals(info);
1697 spin_unlock_irqrestore(&info->lock, flags);
1698 if (info->serial_signals & SerialSignal_DCD)
1699 netif_carrier_on(dev);
1700 else
1701 netif_carrier_off(dev);
1702 return 0;
1703 }
1704
1705 /**
1706 * called by network layer when interface is disabled
1707 * shutdown hardware and release resources
1708 *
1709 * dev pointer to network device structure
1710 *
1711 * returns 0 if success, otherwise error code
1712 */
1713 static int hdlcdev_close(struct net_device *dev)
1714 {
1715 SLMP_INFO *info = dev_to_port(dev);
1716 unsigned long flags;
1717
1718 if (debug_level >= DEBUG_LEVEL_INFO)
1719 printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
1720
1721 netif_stop_queue(dev);
1722
1723 /* shutdown adapter and release resources */
1724 shutdown(info);
1725
1726 hdlc_close(dev);
1727
1728 spin_lock_irqsave(&info->netlock, flags);
1729 info->netcount=0;
1730 spin_unlock_irqrestore(&info->netlock, flags);
1731
1732 return 0;
1733 }
1734
1735 /**
1736 * called by network layer to process IOCTL call to network device
1737 *
1738 * dev pointer to network device structure
1739 * ifr pointer to network interface request structure
1740 * cmd IOCTL command code
1741 *
1742 * returns 0 if success, otherwise error code
1743 */
1744 static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1745 {
1746 const size_t size = sizeof(sync_serial_settings);
1747 sync_serial_settings new_line;
1748 sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
1749 SLMP_INFO *info = dev_to_port(dev);
1750 unsigned int flags;
1751
1752 if (debug_level >= DEBUG_LEVEL_INFO)
1753 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
1754
1755 /* return error if TTY interface open */
1756 if (info->port.count)
1757 return -EBUSY;
1758
1759 if (cmd != SIOCWANDEV)
1760 return hdlc_ioctl(dev, ifr, cmd);
1761
1762 switch(ifr->ifr_settings.type) {
1763 case IF_GET_IFACE: /* return current sync_serial_settings */
1764
1765 ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
1766 if (ifr->ifr_settings.size < size) {
1767 ifr->ifr_settings.size = size; /* data size wanted */
1768 return -ENOBUFS;
1769 }
1770
1771 flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
1772 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
1773 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
1774 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
1775
1776 switch (flags){
1777 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
1778 case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
1779 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
1780 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
1781 default: new_line.clock_type = CLOCK_DEFAULT;
1782 }
1783
1784 new_line.clock_rate = info->params.clock_speed;
1785 new_line.loopback = info->params.loopback ? 1:0;
1786
1787 if (copy_to_user(line, &new_line, size))
1788 return -EFAULT;
1789 return 0;
1790
1791 case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
1792
1793 if(!capable(CAP_NET_ADMIN))
1794 return -EPERM;
1795 if (copy_from_user(&new_line, line, size))
1796 return -EFAULT;
1797
1798 switch (new_line.clock_type)
1799 {
1800 case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
1801 case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
1802 case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
1803 case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
1804 case CLOCK_DEFAULT: flags = info->params.flags &
1805 (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
1806 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
1807 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
1808 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
1809 default: return -EINVAL;
1810 }
1811
1812 if (new_line.loopback != 0 && new_line.loopback != 1)
1813 return -EINVAL;
1814
1815 info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
1816 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
1817 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
1818 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
1819 info->params.flags |= flags;
1820
1821 info->params.loopback = new_line.loopback;
1822
1823 if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
1824 info->params.clock_speed = new_line.clock_rate;
1825 else
1826 info->params.clock_speed = 0;
1827
1828 /* if network interface up, reprogram hardware */
1829 if (info->netcount)
1830 program_hw(info);
1831 return 0;
1832
1833 default:
1834 return hdlc_ioctl(dev, ifr, cmd);
1835 }
1836 }
1837
1838 /**
1839 * called by network layer when transmit timeout is detected
1840 *
1841 * dev pointer to network device structure
1842 */
1843 static void hdlcdev_tx_timeout(struct net_device *dev)
1844 {
1845 SLMP_INFO *info = dev_to_port(dev);
1846 unsigned long flags;
1847
1848 if (debug_level >= DEBUG_LEVEL_INFO)
1849 printk("hdlcdev_tx_timeout(%s)\n",dev->name);
1850
1851 dev->stats.tx_errors++;
1852 dev->stats.tx_aborted_errors++;
1853
1854 spin_lock_irqsave(&info->lock,flags);
1855 tx_stop(info);
1856 spin_unlock_irqrestore(&info->lock,flags);
1857
1858 netif_wake_queue(dev);
1859 }
1860
1861 /**
1862 * called by device driver when transmit completes
1863 * reenable network layer transmit if stopped
1864 *
1865 * info pointer to device instance information
1866 */
1867 static void hdlcdev_tx_done(SLMP_INFO *info)
1868 {
1869 if (netif_queue_stopped(info->netdev))
1870 netif_wake_queue(info->netdev);
1871 }
1872
1873 /**
1874 * called by device driver when frame received
1875 * pass frame to network layer
1876 *
1877 * info pointer to device instance information
1878 * buf pointer to buffer contianing frame data
1879 * size count of data bytes in buf
1880 */
1881 static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size)
1882 {
1883 struct sk_buff *skb = dev_alloc_skb(size);
1884 struct net_device *dev = info->netdev;
1885
1886 if (debug_level >= DEBUG_LEVEL_INFO)
1887 printk("hdlcdev_rx(%s)\n",dev->name);
1888
1889 if (skb == NULL) {
1890 printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n",
1891 dev->name);
1892 dev->stats.rx_dropped++;
1893 return;
1894 }
1895
1896 memcpy(skb_put(skb, size), buf, size);
1897
1898 skb->protocol = hdlc_type_trans(skb, dev);
1899
1900 dev->stats.rx_packets++;
1901 dev->stats.rx_bytes += size;
1902
1903 netif_rx(skb);
1904 }
1905
1906 static const struct net_device_ops hdlcdev_ops = {
1907 .ndo_open = hdlcdev_open,
1908 .ndo_stop = hdlcdev_close,
1909 .ndo_change_mtu = hdlc_change_mtu,
1910 .ndo_start_xmit = hdlc_start_xmit,
1911 .ndo_do_ioctl = hdlcdev_ioctl,
1912 .ndo_tx_timeout = hdlcdev_tx_timeout,
1913 };
1914
1915 /**
1916 * called by device driver when adding device instance
1917 * do generic HDLC initialization
1918 *
1919 * info pointer to device instance information
1920 *
1921 * returns 0 if success, otherwise error code
1922 */
1923 static int hdlcdev_init(SLMP_INFO *info)
1924 {
1925 int rc;
1926 struct net_device *dev;
1927 hdlc_device *hdlc;
1928
1929 /* allocate and initialize network and HDLC layer objects */
1930
1931 if (!(dev = alloc_hdlcdev(info))) {
1932 printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
1933 return -ENOMEM;
1934 }
1935
1936 /* for network layer reporting purposes only */
1937 dev->mem_start = info->phys_sca_base;
1938 dev->mem_end = info->phys_sca_base + SCA_BASE_SIZE - 1;
1939 dev->irq = info->irq_level;
1940
1941 /* network layer callbacks and settings */
1942 dev->netdev_ops = &hdlcdev_ops;
1943 dev->watchdog_timeo = 10 * HZ;
1944 dev->tx_queue_len = 50;
1945
1946 /* generic HDLC layer callbacks and settings */
1947 hdlc = dev_to_hdlc(dev);
1948 hdlc->attach = hdlcdev_attach;
1949 hdlc->xmit = hdlcdev_xmit;
1950
1951 /* register objects with HDLC layer */
1952 if ((rc = register_hdlc_device(dev))) {
1953 printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
1954 free_netdev(dev);
1955 return rc;
1956 }
1957
1958 info->netdev = dev;
1959 return 0;
1960 }
1961
1962 /**
1963 * called by device driver when removing device instance
1964 * do generic HDLC cleanup
1965 *
1966 * info pointer to device instance information
1967 */
1968 static void hdlcdev_exit(SLMP_INFO *info)
1969 {
1970 unregister_hdlc_device(info->netdev);
1971 free_netdev(info->netdev);
1972 info->netdev = NULL;
1973 }
1974
1975 #endif /* CONFIG_HDLC */
1976
1977
1978 /* Return next bottom half action to perform.
1979 * Return Value: BH action code or 0 if nothing to do.
1980 */
1981 static int bh_action(SLMP_INFO *info)
1982 {
1983 unsigned long flags;
1984 int rc = 0;
1985
1986 spin_lock_irqsave(&info->lock,flags);
1987
1988 if (info->pending_bh & BH_RECEIVE) {
1989 info->pending_bh &= ~BH_RECEIVE;
1990 rc = BH_RECEIVE;
1991 } else if (info->pending_bh & BH_TRANSMIT) {
1992 info->pending_bh &= ~BH_TRANSMIT;
1993 rc = BH_TRANSMIT;
1994 } else if (info->pending_bh & BH_STATUS) {
1995 info->pending_bh &= ~BH_STATUS;
1996 rc = BH_STATUS;
1997 }
1998
1999 if (!rc) {
2000 /* Mark BH routine as complete */
2001 info->bh_running = false;
2002 info->bh_requested = false;
2003 }
2004
2005 spin_unlock_irqrestore(&info->lock,flags);
2006
2007 return rc;
2008 }
2009
2010 /* Perform bottom half processing of work items queued by ISR.
2011 */
2012 static void bh_handler(struct work_struct *work)
2013 {
2014 SLMP_INFO *info = container_of(work, SLMP_INFO, task);
2015 int action;
2016
2017 if (!info)
2018 return;
2019
2020 if ( debug_level >= DEBUG_LEVEL_BH )
2021 printk( "%s(%d):%s bh_handler() entry\n",
2022 __FILE__,__LINE__,info->device_name);
2023
2024 info->bh_running = true;
2025
2026 while((action = bh_action(info)) != 0) {
2027
2028 /* Process work item */
2029 if ( debug_level >= DEBUG_LEVEL_BH )
2030 printk( "%s(%d):%s bh_handler() work item action=%d\n",
2031 __FILE__,__LINE__,info->device_name, action);
2032
2033 switch (action) {
2034
2035 case BH_RECEIVE:
2036 bh_receive(info);
2037 break;
2038 case BH_TRANSMIT:
2039 bh_transmit(info);
2040 break;
2041 case BH_STATUS:
2042 bh_status(info);
2043 break;
2044 default:
2045 /* unknown work item ID */
2046 printk("%s(%d):%s Unknown work item ID=%08X!\n",
2047 __FILE__,__LINE__,info->device_name,action);
2048 break;
2049 }
2050 }
2051
2052 if ( debug_level >= DEBUG_LEVEL_BH )
2053 printk( "%s(%d):%s bh_handler() exit\n",
2054 __FILE__,__LINE__,info->device_name);
2055 }
2056
2057 static void bh_receive(SLMP_INFO *info)
2058 {
2059 if ( debug_level >= DEBUG_LEVEL_BH )
2060 printk( "%s(%d):%s bh_receive()\n",
2061 __FILE__,__LINE__,info->device_name);
2062
2063 while( rx_get_frame(info) );
2064 }
2065
2066 static void bh_transmit(SLMP_INFO *info)
2067 {
2068 struct tty_struct *tty = info->port.tty;
2069
2070 if ( debug_level >= DEBUG_LEVEL_BH )
2071 printk( "%s(%d):%s bh_transmit() entry\n",
2072 __FILE__,__LINE__,info->device_name);
2073
2074 if (tty)
2075 tty_wakeup(tty);
2076 }
2077
2078 static void bh_status(SLMP_INFO *info)
2079 {
2080 if ( debug_level >= DEBUG_LEVEL_BH )
2081 printk( "%s(%d):%s bh_status() entry\n",
2082 __FILE__,__LINE__,info->device_name);
2083
2084 info->ri_chkcount = 0;
2085 info->dsr_chkcount = 0;
2086 info->dcd_chkcount = 0;
2087 info->cts_chkcount = 0;
2088 }
2089
2090 static void isr_timer(SLMP_INFO * info)
2091 {
2092 unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0;
2093
2094 /* IER2<7..4> = timer<3..0> interrupt enables (0=disabled) */
2095 write_reg(info, IER2, 0);
2096
2097 /* TMCS, Timer Control/Status Register
2098 *
2099 * 07 CMF, Compare match flag (read only) 1=match
2100 * 06 ECMI, CMF Interrupt Enable: 0=disabled
2101 * 05 Reserved, must be 0
2102 * 04 TME, Timer Enable
2103 * 03..00 Reserved, must be 0
2104 *
2105 * 0000 0000
2106 */
2107 write_reg(info, (unsigned char)(timer + TMCS), 0);
2108
2109 info->irq_occurred = true;
2110
2111 if ( debug_level >= DEBUG_LEVEL_ISR )
2112 printk("%s(%d):%s isr_timer()\n",
2113 __FILE__,__LINE__,info->device_name);
2114 }
2115
2116 static void isr_rxint(SLMP_INFO * info)
2117 {
2118 struct tty_struct *tty = info->port.tty;
2119 struct mgsl_icount *icount = &info->icount;
2120 unsigned char status = read_reg(info, SR1) & info->ie1_value & (FLGD + IDLD + CDCD + BRKD);
2121 unsigned char status2 = read_reg(info, SR2) & info->ie2_value & OVRN;
2122
2123 /* clear status bits */
2124 if (status)
2125 write_reg(info, SR1, status);
2126
2127 if (status2)
2128 write_reg(info, SR2, status2);
2129
2130 if ( debug_level >= DEBUG_LEVEL_ISR )
2131 printk("%s(%d):%s isr_rxint status=%02X %02x\n",
2132 __FILE__,__LINE__,info->device_name,status,status2);
2133
2134 if (info->params.mode == MGSL_MODE_ASYNC) {
2135 if (status & BRKD) {
2136 icount->brk++;
2137
2138 /* process break detection if tty control
2139 * is not set to ignore it
2140 */
2141 if ( tty ) {
2142 if (!(status & info->ignore_status_mask1)) {
2143 if (info->read_status_mask1 & BRKD) {
2144 tty_insert_flip_char(tty, 0, TTY_BREAK);
2145 if (info->port.flags & ASYNC_SAK)
2146 do_SAK(tty);
2147 }
2148 }
2149 }
2150 }
2151 }
2152 else {
2153 if (status & (FLGD|IDLD)) {
2154 if (status & FLGD)
2155 info->icount.exithunt++;
2156 else if (status & IDLD)
2157 info->icount.rxidle++;
2158 wake_up_interruptible(&info->event_wait_q);
2159 }
2160 }
2161
2162 if (status & CDCD) {
2163 /* simulate a common modem status change interrupt
2164 * for our handler
2165 */
2166 get_signals( info );
2167 isr_io_pin(info,
2168 MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD));
2169 }
2170 }
2171
2172 /*
2173 * handle async rx data interrupts
2174 */
2175 static void isr_rxrdy(SLMP_INFO * info)
2176 {
2177 u16 status;
2178 unsigned char DataByte;
2179 struct tty_struct *tty = info->port.tty;
2180 struct mgsl_icount *icount = &info->icount;
2181
2182 if ( debug_level >= DEBUG_LEVEL_ISR )
2183 printk("%s(%d):%s isr_rxrdy\n",
2184 __FILE__,__LINE__,info->device_name);
2185
2186 while((status = read_reg(info,CST0)) & BIT0)
2187 {
2188 int flag = 0;
2189 bool over = false;
2190 DataByte = read_reg(info,TRB);
2191
2192 icount->rx++;
2193
2194 if ( status & (PE + FRME + OVRN) ) {
2195 printk("%s(%d):%s rxerr=%04X\n",
2196 __FILE__,__LINE__,info->device_name,status);
2197
2198 /* update error statistics */
2199 if (status & PE)
2200 icount->parity++;
2201 else if (status & FRME)
2202 icount->frame++;
2203 else if (status & OVRN)
2204 icount->overrun++;
2205
2206 /* discard char if tty control flags say so */
2207 if (status & info->ignore_status_mask2)
2208 continue;
2209
2210 status &= info->read_status_mask2;
2211
2212 if ( tty ) {
2213 if (status & PE)
2214 flag = TTY_PARITY;
2215 else if (status & FRME)
2216 flag = TTY_FRAME;
2217 if (status & OVRN) {
2218 /* Overrun is special, since it's
2219 * reported immediately, and doesn't
2220 * affect the current character
2221 */
2222 over = true;
2223 }
2224 }
2225 } /* end of if (error) */
2226
2227 if ( tty ) {
2228 tty_insert_flip_char(tty, DataByte, flag);
2229 if (over)
2230 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
2231 }
2232 }
2233
2234 if ( debug_level >= DEBUG_LEVEL_ISR ) {
2235 printk("%s(%d):%s rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
2236 __FILE__,__LINE__,info->device_name,
2237 icount->rx,icount->brk,icount->parity,
2238 icount->frame,icount->overrun);
2239 }
2240
2241 if ( tty )
2242 tty_flip_buffer_push(tty);
2243 }
2244
2245 static void isr_txeom(SLMP_INFO * info, unsigned char status)
2246 {
2247 if ( debug_level >= DEBUG_LEVEL_ISR )
2248 printk("%s(%d):%s isr_txeom status=%02x\n",
2249 __FILE__,__LINE__,info->device_name,status);
2250
2251 write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */
2252 write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */
2253 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
2254
2255 if (status & UDRN) {
2256 write_reg(info, CMD, TXRESET);
2257 write_reg(info, CMD, TXENABLE);
2258 } else
2259 write_reg(info, CMD, TXBUFCLR);
2260
2261 /* disable and clear tx interrupts */
2262 info->ie0_value &= ~TXRDYE;
2263 info->ie1_value &= ~(IDLE + UDRN);
2264 write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value));
2265 write_reg(info, SR1, (unsigned char)(UDRN + IDLE));
2266
2267 if ( info->tx_active ) {
2268 if (info->params.mode != MGSL_MODE_ASYNC) {
2269 if (status & UDRN)
2270 info->icount.txunder++;
2271 else if (status & IDLE)
2272 info->icount.txok++;
2273 }
2274
2275 info->tx_active = false;
2276 info->tx_count = info->tx_put = info->tx_get = 0;
2277
2278 del_timer(&info->tx_timer);
2279
2280 if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done ) {
2281 info->serial_signals &= ~SerialSignal_RTS;
2282 info->drop_rts_on_tx_done = false;
2283 set_signals(info);
2284 }
2285
2286 #if SYNCLINK_GENERIC_HDLC
2287 if (info->netcount)
2288 hdlcdev_tx_done(info);
2289 else
2290 #endif
2291 {
2292 if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) {
2293 tx_stop(info);
2294 return;
2295 }
2296 info->pending_bh |= BH_TRANSMIT;
2297 }
2298 }
2299 }
2300
2301
2302 /*
2303 * handle tx status interrupts
2304 */
2305 static void isr_txint(SLMP_INFO * info)
2306 {
2307 unsigned char status = read_reg(info, SR1) & info->ie1_value & (UDRN + IDLE + CCTS);
2308
2309 /* clear status bits */
2310 write_reg(info, SR1, status);
2311
2312 if ( debug_level >= DEBUG_LEVEL_ISR )
2313 printk("%s(%d):%s isr_txint status=%02x\n",
2314 __FILE__,__LINE__,info->device_name,status);
2315
2316 if (status & (UDRN + IDLE))
2317 isr_txeom(info, status);
2318
2319 if (status & CCTS) {
2320 /* simulate a common modem status change interrupt
2321 * for our handler
2322 */
2323 get_signals( info );
2324 isr_io_pin(info,
2325 MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS));
2326
2327 }
2328 }
2329
2330 /*
2331 * handle async tx data interrupts
2332 */
2333 static void isr_txrdy(SLMP_INFO * info)
2334 {
2335 if ( debug_level >= DEBUG_LEVEL_ISR )
2336 printk("%s(%d):%s isr_txrdy() tx_count=%d\n",
2337 __FILE__,__LINE__,info->device_name,info->tx_count);
2338
2339 if (info->params.mode != MGSL_MODE_ASYNC) {
2340 /* disable TXRDY IRQ, enable IDLE IRQ */
2341 info->ie0_value &= ~TXRDYE;
2342 info->ie1_value |= IDLE;
2343 write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value));
2344 return;
2345 }
2346
2347 if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) {
2348 tx_stop(info);
2349 return;
2350 }
2351
2352 if ( info->tx_count )
2353 tx_load_fifo( info );
2354 else {
2355 info->tx_active = false;
2356 info->ie0_value &= ~TXRDYE;
2357 write_reg(info, IE0, info->ie0_value);
2358 }
2359
2360 if (info->tx_count < WAKEUP_CHARS)
2361 info->pending_bh |= BH_TRANSMIT;
2362 }
2363
2364 static void isr_rxdmaok(SLMP_INFO * info)
2365 {
2366 /* BIT7 = EOT (end of transfer)
2367 * BIT6 = EOM (end of message/frame)
2368 */
2369 unsigned char status = read_reg(info,RXDMA + DSR) & 0xc0;
2370
2371 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2372 write_reg(info, RXDMA + DSR, (unsigned char)(status | 1));
2373
2374 if ( debug_level >= DEBUG_LEVEL_ISR )
2375 printk("%s(%d):%s isr_rxdmaok(), status=%02x\n",
2376 __FILE__,__LINE__,info->device_name,status);
2377
2378 info->pending_bh |= BH_RECEIVE;
2379 }
2380
2381 static void isr_rxdmaerror(SLMP_INFO * info)
2382 {
2383 /* BIT5 = BOF (buffer overflow)
2384 * BIT4 = COF (counter overflow)
2385 */
2386 unsigned char status = read_reg(info,RXDMA + DSR) & 0x30;
2387
2388 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2389 write_reg(info, RXDMA + DSR, (unsigned char)(status | 1));
2390
2391 if ( debug_level >= DEBUG_LEVEL_ISR )
2392 printk("%s(%d):%s isr_rxdmaerror(), status=%02x\n",
2393 __FILE__,__LINE__,info->device_name,status);
2394
2395 info->rx_overflow = true;
2396 info->pending_bh |= BH_RECEIVE;
2397 }
2398
2399 static void isr_txdmaok(SLMP_INFO * info)
2400 {
2401 unsigned char status_reg1 = read_reg(info, SR1);
2402
2403 write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */
2404 write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */
2405 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
2406
2407 if ( debug_level >= DEBUG_LEVEL_ISR )
2408 printk("%s(%d):%s isr_txdmaok(), status=%02x\n",
2409 __FILE__,__LINE__,info->device_name,status_reg1);
2410
2411 /* program TXRDY as FIFO empty flag, enable TXRDY IRQ */
2412 write_reg16(info, TRC0, 0);
2413 info->ie0_value |= TXRDYE;
2414 write_reg(info, IE0, info->ie0_value);
2415 }
2416
2417 static void isr_txdmaerror(SLMP_INFO * info)
2418 {
2419 /* BIT5 = BOF (buffer overflow)
2420 * BIT4 = COF (counter overflow)
2421 */
2422 unsigned char status = read_reg(info,TXDMA + DSR) & 0x30;
2423
2424 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2425 write_reg(info, TXDMA + DSR, (unsigned char)(status | 1));
2426
2427 if ( debug_level >= DEBUG_LEVEL_ISR )
2428 printk("%s(%d):%s isr_txdmaerror(), status=%02x\n",
2429 __FILE__,__LINE__,info->device_name,status);
2430 }
2431
2432 /* handle input serial signal changes
2433 */
2434 static void isr_io_pin( SLMP_INFO *info, u16 status )
2435 {
2436 struct mgsl_icount *icount;
2437
2438 if ( debug_level >= DEBUG_LEVEL_ISR )
2439 printk("%s(%d):isr_io_pin status=%04X\n",
2440 __FILE__,__LINE__,status);
2441
2442 if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED |
2443 MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) {
2444 icount = &info->icount;
2445 /* update input line counters */
2446 if (status & MISCSTATUS_RI_LATCHED) {
2447 icount->rng++;
2448 if ( status & SerialSignal_RI )
2449 info->input_signal_events.ri_up++;
2450 else
2451 info->input_signal_events.ri_down++;
2452 }
2453 if (status & MISCSTATUS_DSR_LATCHED) {
2454 icount->dsr++;
2455 if ( status & SerialSignal_DSR )
2456 info->input_signal_events.dsr_up++;
2457 else
2458 info->input_signal_events.dsr_down++;
2459 }
2460 if (status & MISCSTATUS_DCD_LATCHED) {
2461 if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) {
2462 info->ie1_value &= ~CDCD;
2463 write_reg(info, IE1, info->ie1_value);
2464 }
2465 icount->dcd++;
2466 if (status & SerialSignal_DCD) {
2467 info->input_signal_events.dcd_up++;
2468 } else
2469 info->input_signal_events.dcd_down++;
2470 #if SYNCLINK_GENERIC_HDLC
2471 if (info->netcount) {
2472 if (status & SerialSignal_DCD)
2473 netif_carrier_on(info->netdev);
2474 else
2475 netif_carrier_off(info->netdev);
2476 }
2477 #endif
2478 }
2479 if (status & MISCSTATUS_CTS_LATCHED)
2480 {
2481 if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) {
2482 info->ie1_value &= ~CCTS;
2483 write_reg(info, IE1, info->ie1_value);
2484 }
2485 icount->cts++;
2486 if ( status & SerialSignal_CTS )
2487 info->input_signal_events.cts_up++;
2488 else
2489 info->input_signal_events.cts_down++;
2490 }
2491 wake_up_interruptible(&info->status_event_wait_q);
2492 wake_up_interruptible(&info->event_wait_q);
2493
2494 if ( (info->port.flags & ASYNC_CHECK_CD) &&
2495 (status & MISCSTATUS_DCD_LATCHED) ) {
2496 if ( debug_level >= DEBUG_LEVEL_ISR )
2497 printk("%s CD now %s...", info->device_name,
2498 (status & SerialSignal_DCD) ? "on" : "off");
2499 if (status & SerialSignal_DCD)
2500 wake_up_interruptible(&info->port.open_wait);
2501 else {
2502 if ( debug_level >= DEBUG_LEVEL_ISR )
2503 printk("doing serial hangup...");
2504 if (info->port.tty)
2505 tty_hangup(info->port.tty);
2506 }
2507 }
2508
2509 if ( (info->port.flags & ASYNC_CTS_FLOW) &&
2510 (status & MISCSTATUS_CTS_LATCHED) ) {
2511 if ( info->port.tty ) {
2512 if (info->port.tty->hw_stopped) {
2513 if (status & SerialSignal_CTS) {
2514 if ( debug_level >= DEBUG_LEVEL_ISR )
2515 printk("CTS tx start...");
2516 info->port.tty->hw_stopped = 0;
2517 tx_start(info);
2518 info->pending_bh |= BH_TRANSMIT;
2519 return;
2520 }
2521 } else {
2522 if (!(status & SerialSignal_CTS)) {
2523 if ( debug_level >= DEBUG_LEVEL_ISR )
2524 printk("CTS tx stop...");
2525 info->port.tty->hw_stopped = 1;
2526 tx_stop(info);
2527 }
2528 }
2529 }
2530 }
2531 }
2532
2533 info->pending_bh |= BH_STATUS;
2534 }
2535
2536 /* Interrupt service routine entry point.
2537 *
2538 * Arguments:
2539 * irq interrupt number that caused interrupt
2540 * dev_id device ID supplied during interrupt registration
2541 * regs interrupted processor context
2542 */
2543 static irqreturn_t synclinkmp_interrupt(int dummy, void *dev_id)
2544 {
2545 SLMP_INFO *info = dev_id;
2546 unsigned char status, status0, status1=0;
2547 unsigned char dmastatus, dmastatus0, dmastatus1=0;
2548 unsigned char timerstatus0, timerstatus1=0;
2549 unsigned char shift;
2550 unsigned int i;
2551 unsigned short tmp;
2552
2553 if ( debug_level >= DEBUG_LEVEL_ISR )
2554 printk(KERN_DEBUG "%s(%d): synclinkmp_interrupt(%d)entry.\n",
2555 __FILE__, __LINE__, info->irq_level);
2556
2557 spin_lock(&info->lock);
2558
2559 for(;;) {
2560
2561 /* get status for SCA0 (ports 0-1) */
2562 tmp = read_reg16(info, ISR0); /* get ISR0 and ISR1 in one read */
2563 status0 = (unsigned char)tmp;
2564 dmastatus0 = (unsigned char)(tmp>>8);
2565 timerstatus0 = read_reg(info, ISR2);
2566
2567 if ( debug_level >= DEBUG_LEVEL_ISR )
2568 printk(KERN_DEBUG "%s(%d):%s status0=%02x, dmastatus0=%02x, timerstatus0=%02x\n",
2569 __FILE__, __LINE__, info->device_name,
2570 status0, dmastatus0, timerstatus0);
2571
2572 if (info->port_count == 4) {
2573 /* get status for SCA1 (ports 2-3) */
2574 tmp = read_reg16(info->port_array[2], ISR0);
2575 status1 = (unsigned char)tmp;
2576 dmastatus1 = (unsigned char)(tmp>>8);
2577 timerstatus1 = read_reg(info->port_array[2], ISR2);
2578
2579 if ( debug_level >= DEBUG_LEVEL_ISR )
2580 printk("%s(%d):%s status1=%02x, dmastatus1=%02x, timerstatus1=%02x\n",
2581 __FILE__,__LINE__,info->device_name,
2582 status1,dmastatus1,timerstatus1);
2583 }
2584
2585 if (!status0 && !dmastatus0 && !timerstatus0 &&
2586 !status1 && !dmastatus1 && !timerstatus1)
2587 break;
2588
2589 for(i=0; i < info->port_count ; i++) {
2590 if (info->port_array[i] == NULL)
2591 continue;
2592 if (i < 2) {
2593 status = status0;
2594 dmastatus = dmastatus0;
2595 } else {
2596 status = status1;
2597 dmastatus = dmastatus1;
2598 }
2599
2600 shift = i & 1 ? 4 :0;
2601
2602 if (status & BIT0 << shift)
2603 isr_rxrdy(info->port_array[i]);
2604 if (status & BIT1 << shift)
2605 isr_txrdy(info->port_array[i]);
2606 if (status & BIT2 << shift)
2607 isr_rxint(info->port_array[i]);
2608 if (status & BIT3 << shift)
2609 isr_txint(info->port_array[i]);
2610
2611 if (dmastatus & BIT0 << shift)
2612 isr_rxdmaerror(info->port_array[i]);
2613 if (dmastatus & BIT1 << shift)
2614 isr_rxdmaok(info->port_array[i]);
2615 if (dmastatus & BIT2 << shift)
2616 isr_txdmaerror(info->port_array[i]);
2617 if (dmastatus & BIT3 << shift)
2618 isr_txdmaok(info->port_array[i]);
2619 }
2620
2621 if (timerstatus0 & (BIT5 | BIT4))
2622 isr_timer(info->port_array[0]);
2623 if (timerstatus0 & (BIT7 | BIT6))
2624 isr_timer(info->port_array[1]);
2625 if (timerstatus1 & (BIT5 | BIT4))
2626 isr_timer(info->port_array[2]);
2627 if (timerstatus1 & (BIT7 | BIT6))
2628 isr_timer(info->port_array[3]);
2629 }
2630
2631 for(i=0; i < info->port_count ; i++) {
2632 SLMP_INFO * port = info->port_array[i];
2633
2634 /* Request bottom half processing if there's something
2635 * for it to do and the bh is not already running.
2636 *
2637 * Note: startup adapter diags require interrupts.
2638 * do not request bottom half processing if the
2639 * device is not open in a normal mode.
2640 */
2641 if ( port && (port->port.count || port->netcount) &&
2642 port->pending_bh && !port->bh_running &&
2643 !port->bh_requested ) {
2644 if ( debug_level >= DEBUG_LEVEL_ISR )
2645 printk("%s(%d):%s queueing bh task.\n",
2646 __FILE__,__LINE__,port->device_name);
2647 schedule_work(&port->task);
2648 port->bh_requested = true;
2649 }
2650 }
2651
2652 spin_unlock(&info->lock);
2653
2654 if ( debug_level >= DEBUG_LEVEL_ISR )
2655 printk(KERN_DEBUG "%s(%d):synclinkmp_interrupt(%d)exit.\n",
2656 __FILE__, __LINE__, info->irq_level);
2657 return IRQ_HANDLED;
2658 }
2659
2660 /* Initialize and start device.
2661 */
2662 static int startup(SLMP_INFO * info)
2663 {
2664 if ( debug_level >= DEBUG_LEVEL_INFO )
2665 printk("%s(%d):%s tx_releaseup()\n",__FILE__,__LINE__,info->device_name);
2666
2667 if (info->port.flags & ASYNC_INITIALIZED)
2668 return 0;
2669
2670 if (!info->tx_buf) {
2671 info->tx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
2672 if (!info->tx_buf) {
2673 printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
2674 __FILE__,__LINE__,info->device_name);
2675 return -ENOMEM;
2676 }
2677 }
2678
2679 info->pending_bh = 0;
2680
2681 memset(&info->icount, 0, sizeof(info->icount));
2682
2683 /* program hardware for current parameters */
2684 reset_port(info);
2685
2686 change_params(info);
2687
2688 mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10));
2689
2690 if (info->port.tty)
2691 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
2692
2693 info->port.flags |= ASYNC_INITIALIZED;
2694
2695 return 0;
2696 }
2697
2698 /* Called by close() and hangup() to shutdown hardware
2699 */
2700 static void shutdown(SLMP_INFO * info)
2701 {
2702 unsigned long flags;
2703
2704 if (!(info->port.flags & ASYNC_INITIALIZED))
2705 return;
2706
2707 if (debug_level >= DEBUG_LEVEL_INFO)
2708 printk("%s(%d):%s synclinkmp_shutdown()\n",
2709 __FILE__,__LINE__, info->device_name );
2710
2711 /* clear status wait queue because status changes */
2712 /* can't happen after shutting down the hardware */
2713 wake_up_interruptible(&info->status_event_wait_q);
2714 wake_up_interruptible(&info->event_wait_q);
2715
2716 del_timer(&info->tx_timer);
2717 del_timer(&info->status_timer);
2718
2719 kfree(info->tx_buf);
2720 info->tx_buf = NULL;
2721
2722 spin_lock_irqsave(&info->lock,flags);
2723
2724 reset_port(info);
2725
2726 if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) {
2727 info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
2728 set_signals(info);
2729 }
2730
2731 spin_unlock_irqrestore(&info->lock,flags);
2732
2733 if (info->port.tty)
2734 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2735
2736 info->port.flags &= ~ASYNC_INITIALIZED;
2737 }
2738
2739 static void program_hw(SLMP_INFO *info)
2740 {
2741 unsigned long flags;
2742
2743 spin_lock_irqsave(&info->lock,flags);
2744
2745 rx_stop(info);
2746 tx_stop(info);
2747
2748 info->tx_count = info->tx_put = info->tx_get = 0;
2749
2750 if (info->params.mode == MGSL_MODE_HDLC || info->netcount)
2751 hdlc_mode(info);
2752 else
2753 async_mode(info);
2754
2755 set_signals(info);
2756
2757 info->dcd_chkcount = 0;
2758 info->cts_chkcount = 0;
2759 info->ri_chkcount = 0;
2760 info->dsr_chkcount = 0;
2761
2762 info->ie1_value |= (CDCD|CCTS);
2763 write_reg(info, IE1, info->ie1_value);
2764
2765 get_signals(info);
2766
2767 if (info->netcount || (info->port.tty && info->port.tty->termios->c_cflag & CREAD) )
2768 rx_start(info);
2769
2770 spin_unlock_irqrestore(&info->lock,flags);
2771 }
2772
2773 /* Reconfigure adapter based on new parameters
2774 */
2775 static void change_params(SLMP_INFO *info)
2776 {
2777 unsigned cflag;
2778 int bits_per_char;
2779
2780 if (!info->port.tty || !info->port.tty->termios)
2781 return;
2782
2783 if (debug_level >= DEBUG_LEVEL_INFO)
2784 printk("%s(%d):%s change_params()\n",
2785 __FILE__,__LINE__, info->device_name );
2786
2787 cflag = info->port.tty->termios->c_cflag;
2788
2789 /* if B0 rate (hangup) specified then negate DTR and RTS */
2790 /* otherwise assert DTR and RTS */
2791 if (cflag & CBAUD)
2792 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
2793 else
2794 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
2795
2796 /* byte size and parity */
2797
2798 switch (cflag & CSIZE) {
2799 case CS5: info->params.data_bits = 5; break;
2800 case CS6: info->params.data_bits = 6; break;
2801 case CS7: info->params.data_bits = 7; break;
2802 case CS8: info->params.data_bits = 8; break;
2803 /* Never happens, but GCC is too dumb to figure it out */
2804 default: info->params.data_bits = 7; break;
2805 }
2806
2807 if (cflag & CSTOPB)
2808 info->params.stop_bits = 2;
2809 else
2810 info->params.stop_bits = 1;
2811
2812 info->params.parity = ASYNC_PARITY_NONE;
2813 if (cflag & PARENB) {
2814 if (cflag & PARODD)
2815 info->params.parity = ASYNC_PARITY_ODD;
2816 else
2817 info->params.parity = ASYNC_PARITY_EVEN;
2818 #ifdef CMSPAR
2819 if (cflag & CMSPAR)
2820 info->params.parity = ASYNC_PARITY_SPACE;
2821 #endif
2822 }
2823
2824 /* calculate number of jiffies to transmit a full
2825 * FIFO (32 bytes) at specified data rate
2826 */
2827 bits_per_char = info->params.data_bits +
2828 info->params.stop_bits + 1;
2829
2830 /* if port data rate is set to 460800 or less then
2831 * allow tty settings to override, otherwise keep the
2832 * current data rate.
2833 */
2834 if (info->params.data_rate <= 460800) {
2835 info->params.data_rate = tty_get_baud_rate(info->port.tty);
2836 }
2837
2838 if ( info->params.data_rate ) {
2839 info->timeout = (32*HZ*bits_per_char) /
2840 info->params.data_rate;
2841 }
2842 info->timeout += HZ/50; /* Add .02 seconds of slop */
2843
2844 if (cflag & CRTSCTS)
2845 info->port.flags |= ASYNC_CTS_FLOW;
2846 else
2847 info->port.flags &= ~ASYNC_CTS_FLOW;
2848
2849 if (cflag & CLOCAL)
2850 info->port.flags &= ~ASYNC_CHECK_CD;
2851 else
2852 info->port.flags |= ASYNC_CHECK_CD;
2853
2854 /* process tty input control flags */
2855
2856 info->read_status_mask2 = OVRN;
2857 if (I_INPCK(info->port.tty))
2858 info->read_status_mask2 |= PE | FRME;
2859 if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
2860 info->read_status_mask1 |= BRKD;
2861 if (I_IGNPAR(info->port.tty))
2862 info->ignore_status_mask2 |= PE | FRME;
2863 if (I_IGNBRK(info->port.tty)) {
2864 info->ignore_status_mask1 |= BRKD;
2865 /* If ignoring parity and break indicators, ignore
2866 * overruns too. (For real raw support).
2867 */
2868 if (I_IGNPAR(info->port.tty))
2869 info->ignore_status_mask2 |= OVRN;
2870 }
2871
2872 program_hw(info);
2873 }
2874
2875 static int get_stats(SLMP_INFO * info, struct mgsl_icount __user *user_icount)
2876 {
2877 int err;
2878
2879 if (debug_level >= DEBUG_LEVEL_INFO)
2880 printk("%s(%d):%s get_params()\n",
2881 __FILE__,__LINE__, info->device_name);
2882
2883 if (!user_icount) {
2884 memset(&info->icount, 0, sizeof(info->icount));
2885 } else {
2886 COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
2887 if (err)
2888 return -EFAULT;
2889 }
2890
2891 return 0;
2892 }
2893
2894 static int get_params(SLMP_INFO * info, MGSL_PARAMS __user *user_params)
2895 {
2896 int err;
2897 if (debug_level >= DEBUG_LEVEL_INFO)
2898 printk("%s(%d):%s get_params()\n",
2899 __FILE__,__LINE__, info->device_name);
2900
2901 COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
2902 if (err) {
2903 if ( debug_level >= DEBUG_LEVEL_INFO )
2904 printk( "%s(%d):%s get_params() user buffer copy failed\n",
2905 __FILE__,__LINE__,info->device_name);
2906 return -EFAULT;
2907 }
2908
2909 return 0;
2910 }
2911
2912 static int set_params(SLMP_INFO * info, MGSL_PARAMS __user *new_params)
2913 {
2914 unsigned long flags;
2915 MGSL_PARAMS tmp_params;
2916 int err;
2917
2918 if (debug_level >= DEBUG_LEVEL_INFO)
2919 printk("%s(%d):%s set_params\n",
2920 __FILE__,__LINE__,info->device_name );
2921 COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
2922 if (err) {
2923 if ( debug_level >= DEBUG_LEVEL_INFO )
2924 printk( "%s(%d):%s set_params() user buffer copy failed\n",
2925 __FILE__,__LINE__,info->device_name);
2926 return -EFAULT;
2927 }
2928
2929 spin_lock_irqsave(&info->lock,flags);
2930 memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
2931 spin_unlock_irqrestore(&info->lock,flags);
2932
2933 change_params(info);
2934
2935 return 0;
2936 }
2937
2938 static int get_txidle(SLMP_INFO * info, int __user *idle_mode)
2939 {
2940 int err;
2941
2942 if (debug_level >= DEBUG_LEVEL_INFO)
2943 printk("%s(%d):%s get_txidle()=%d\n",
2944 __FILE__,__LINE__, info->device_name, info->idle_mode);
2945
2946 COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
2947 if (err) {
2948 if ( debug_level >= DEBUG_LEVEL_INFO )
2949 printk( "%s(%d):%s get_txidle() user buffer copy failed\n",
2950 __FILE__,__LINE__,info->device_name);
2951 return -EFAULT;
2952 }
2953
2954 return 0;
2955 }
2956
2957 static int set_txidle(SLMP_INFO * info, int idle_mode)
2958 {
2959 unsigned long flags;
2960
2961 if (debug_level >= DEBUG_LEVEL_INFO)
2962 printk("%s(%d):%s set_txidle(%d)\n",
2963 __FILE__,__LINE__,info->device_name, idle_mode );
2964
2965 spin_lock_irqsave(&info->lock,flags);
2966 info->idle_mode = idle_mode;
2967 tx_set_idle( info );
2968 spin_unlock_irqrestore(&info->lock,flags);
2969 return 0;
2970 }
2971
2972 static int tx_enable(SLMP_INFO * info, int enable)
2973 {
2974 unsigned long flags;
2975
2976 if (debug_level >= DEBUG_LEVEL_INFO)
2977 printk("%s(%d):%s tx_enable(%d)\n",
2978 __FILE__,__LINE__,info->device_name, enable);
2979
2980 spin_lock_irqsave(&info->lock,flags);
2981 if ( enable ) {
2982 if ( !info->tx_enabled ) {
2983 tx_start(info);
2984 }
2985 } else {
2986 if ( info->tx_enabled )
2987 tx_stop(info);
2988 }
2989 spin_unlock_irqrestore(&info->lock,flags);
2990 return 0;
2991 }
2992
2993 /* abort send HDLC frame
2994 */
2995 static int tx_abort(SLMP_INFO * info)
2996 {
2997 unsigned long flags;
2998
2999 if (debug_level >= DEBUG_LEVEL_INFO)
3000 printk("%s(%d):%s tx_abort()\n",
3001 __FILE__,__LINE__,info->device_name);
3002
3003 spin_lock_irqsave(&info->lock,flags);
3004 if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC ) {
3005 info->ie1_value &= ~UDRN;
3006 info->ie1_value |= IDLE;
3007 write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */
3008 write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */
3009
3010 write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
3011 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
3012
3013 write_reg(info, CMD, TXABORT);
3014 }
3015 spin_unlock_irqrestore(&info->lock,flags);
3016 return 0;
3017 }
3018
3019 static int rx_enable(SLMP_INFO * info, int enable)
3020 {
3021 unsigned long flags;
3022
3023 if (debug_level >= DEBUG_LEVEL_INFO)
3024 printk("%s(%d):%s rx_enable(%d)\n",
3025 __FILE__,__LINE__,info->device_name,enable);
3026
3027 spin_lock_irqsave(&info->lock,flags);
3028 if ( enable ) {
3029 if ( !info->rx_enabled )
3030 rx_start(info);
3031 } else {
3032 if ( info->rx_enabled )
3033 rx_stop(info);
3034 }
3035 spin_unlock_irqrestore(&info->lock,flags);
3036 return 0;
3037 }
3038
3039 /* wait for specified event to occur
3040 */
3041 static int wait_mgsl_event(SLMP_INFO * info, int __user *mask_ptr)
3042 {
3043 unsigned long flags;
3044 int s;
3045 int rc=0;
3046 struct mgsl_icount cprev, cnow;
3047 int events;
3048 int mask;
3049 struct _input_signal_events oldsigs, newsigs;
3050 DECLARE_WAITQUEUE(wait, current);
3051
3052 COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
3053 if (rc) {
3054 return -EFAULT;
3055 }
3056
3057 if (debug_level >= DEBUG_LEVEL_INFO)
3058 printk("%s(%d):%s wait_mgsl_event(%d)\n",
3059 __FILE__,__LINE__,info->device_name,mask);
3060
3061 spin_lock_irqsave(&info->lock,flags);
3062
3063 /* return immediately if state matches requested events */
3064 get_signals(info);
3065 s = info->serial_signals;
3066
3067 events = mask &
3068 ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
3069 ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
3070 ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
3071 ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
3072 if (events) {
3073 spin_unlock_irqrestore(&info->lock,flags);
3074 goto exit;
3075 }
3076
3077 /* save current irq counts */
3078 cprev = info->icount;
3079 oldsigs = info->input_signal_events;
3080
3081 /* enable hunt and idle irqs if needed */
3082 if (mask & (MgslEvent_ExitHuntMode+MgslEvent_IdleReceived)) {
3083 unsigned char oldval = info->ie1_value;
3084 unsigned char newval = oldval +
3085 (mask & MgslEvent_ExitHuntMode ? FLGD:0) +
3086 (mask & MgslEvent_IdleReceived ? IDLD:0);
3087 if ( oldval != newval ) {
3088 info->ie1_value = newval;
3089 write_reg(info, IE1, info->ie1_value);
3090 }
3091 }
3092
3093 set_current_state(TASK_INTERRUPTIBLE);
3094 add_wait_queue(&info->event_wait_q, &wait);
3095
3096 spin_unlock_irqrestore(&info->lock,flags);
3097
3098 for(;;) {
3099 schedule();
3100 if (signal_pending(current)) {
3101 rc = -ERESTARTSYS;
3102 break;
3103 }
3104
3105 /* get current irq counts */
3106 spin_lock_irqsave(&info->lock,flags);
3107 cnow = info->icount;
3108 newsigs = info->input_signal_events;
3109 set_current_state(TASK_INTERRUPTIBLE);
3110 spin_unlock_irqrestore(&info->lock,flags);
3111
3112 /* if no change, wait aborted for some reason */
3113 if (newsigs.dsr_up == oldsigs.dsr_up &&
3114 newsigs.dsr_down == oldsigs.dsr_down &&
3115 newsigs.dcd_up == oldsigs.dcd_up &&
3116 newsigs.dcd_down == oldsigs.dcd_down &&
3117 newsigs.cts_up == oldsigs.cts_up &&
3118 newsigs.cts_down == oldsigs.cts_down &&
3119 newsigs.ri_up == oldsigs.ri_up &&
3120 newsigs.ri_down == oldsigs.ri_down &&
3121 cnow.exithunt == cprev.exithunt &&
3122 cnow.rxidle == cprev.rxidle) {
3123 rc = -EIO;
3124 break;
3125 }
3126
3127 events = mask &
3128 ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
3129 (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
3130 (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
3131 (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
3132 (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
3133 (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
3134 (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
3135 (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
3136 (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
3137 (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
3138 if (events)
3139 break;
3140
3141 cprev = cnow;
3142 oldsigs = newsigs;
3143 }
3144
3145 remove_wait_queue(&info->event_wait_q, &wait);
3146 set_current_state(TASK_RUNNING);
3147
3148
3149 if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
3150 spin_lock_irqsave(&info->lock,flags);
3151 if (!waitqueue_active(&info->event_wait_q)) {
3152 /* disable enable exit hunt mode/idle rcvd IRQs */
3153 info->ie1_value &= ~(FLGD|IDLD);
3154 write_reg(info, IE1, info->ie1_value);
3155 }
3156 spin_unlock_irqrestore(&info->lock,flags);
3157 }
3158 exit:
3159 if ( rc == 0 )
3160 PUT_USER(rc, events, mask_ptr);
3161
3162 return rc;
3163 }
3164
3165 static int modem_input_wait(SLMP_INFO *info,int arg)
3166 {
3167 unsigned long flags;
3168 int rc;
3169 struct mgsl_icount cprev, cnow;
3170 DECLARE_WAITQUEUE(wait, current);
3171
3172 /* save current irq counts */
3173 spin_lock_irqsave(&info->lock,flags);
3174 cprev = info->icount;
3175 add_wait_queue(&info->status_event_wait_q, &wait);
3176 set_current_state(TASK_INTERRUPTIBLE);
3177 spin_unlock_irqrestore(&info->lock,flags);
3178
3179 for(;;) {
3180 schedule();
3181 if (signal_pending(current)) {
3182 rc = -ERESTARTSYS;
3183 break;
3184 }
3185
3186 /* get new irq counts */
3187 spin_lock_irqsave(&info->lock,flags);
3188 cnow = info->icount;
3189 set_current_state(TASK_INTERRUPTIBLE);
3190 spin_unlock_irqrestore(&info->lock,flags);
3191
3192 /* if no change, wait aborted for some reason */
3193 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
3194 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
3195 rc = -EIO;
3196 break;
3197 }
3198
3199 /* check for change in caller specified modem input */
3200 if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
3201 (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
3202 (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
3203 (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
3204 rc = 0;
3205 break;
3206 }
3207
3208 cprev = cnow;
3209 }
3210 remove_wait_queue(&info->status_event_wait_q, &wait);
3211 set_current_state(TASK_RUNNING);
3212 return rc;
3213 }
3214
3215 /* return the state of the serial control and status signals
3216 */
3217 static int tiocmget(struct tty_struct *tty, struct file *file)
3218 {
3219 SLMP_INFO *info = tty->driver_data;
3220 unsigned int result;
3221 unsigned long flags;
3222
3223 spin_lock_irqsave(&info->lock,flags);
3224 get_signals(info);
3225 spin_unlock_irqrestore(&info->lock,flags);
3226
3227 result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
3228 ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
3229 ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
3230 ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
3231 ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
3232 ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
3233
3234 if (debug_level >= DEBUG_LEVEL_INFO)
3235 printk("%s(%d):%s tiocmget() value=%08X\n",
3236 __FILE__,__LINE__, info->device_name, result );
3237 return result;
3238 }
3239
3240 /* set modem control signals (DTR/RTS)
3241 */
3242 static int tiocmset(struct tty_struct *tty, struct file *file,
3243 unsigned int set, unsigned int clear)
3244 {
3245 SLMP_INFO *info = tty->driver_data;
3246 unsigned long flags;
3247
3248 if (debug_level >= DEBUG_LEVEL_INFO)
3249 printk("%s(%d):%s tiocmset(%x,%x)\n",
3250 __FILE__,__LINE__,info->device_name, set, clear);
3251
3252 if (set & TIOCM_RTS)
3253 info->serial_signals |= SerialSignal_RTS;
3254 if (set & TIOCM_DTR)
3255 info->serial_signals |= SerialSignal_DTR;
3256 if (clear & TIOCM_RTS)
3257 info->serial_signals &= ~SerialSignal_RTS;
3258 if (clear & TIOCM_DTR)
3259 info->serial_signals &= ~SerialSignal_DTR;
3260
3261 spin_lock_irqsave(&info->lock,flags);
3262 set_signals(info);
3263 spin_unlock_irqrestore(&info->lock,flags);
3264
3265 return 0;
3266 }
3267
3268 static int carrier_raised(struct tty_port *port)
3269 {
3270 SLMP_INFO *info = container_of(port, SLMP_INFO, port);
3271 unsigned long flags;
3272
3273 spin_lock_irqsave(&info->lock,flags);
3274 get_signals(info);
3275 spin_unlock_irqrestore(&info->lock,flags);
3276
3277 return (info->serial_signals & SerialSignal_DCD) ? 1 : 0;
3278 }
3279
3280 static void dtr_rts(struct tty_port *port, int on)
3281 {
3282 SLMP_INFO *info = container_of(port, SLMP_INFO, port);
3283 unsigned long flags;
3284
3285 spin_lock_irqsave(&info->lock,flags);
3286 if (on)
3287 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
3288 else
3289 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
3290 set_signals(info);
3291 spin_unlock_irqrestore(&info->lock,flags);
3292 }
3293
3294 /* Block the current process until the specified port is ready to open.
3295 */
3296 static int block_til_ready(struct tty_struct *tty, struct file *filp,
3297 SLMP_INFO *info)
3298 {
3299 DECLARE_WAITQUEUE(wait, current);
3300 int retval;
3301 bool do_clocal = false;
3302 bool extra_count = false;
3303 unsigned long flags;
3304 int cd;
3305 struct tty_port *port = &info->port;
3306
3307 if (debug_level >= DEBUG_LEVEL_INFO)
3308 printk("%s(%d):%s block_til_ready()\n",
3309 __FILE__,__LINE__, tty->driver->name );
3310
3311 if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
3312 /* nonblock mode is set or port is not enabled */
3313 /* just verify that callout device is not active */
3314 port->flags |= ASYNC_NORMAL_ACTIVE;
3315 return 0;
3316 }
3317
3318 if (tty->termios->c_cflag & CLOCAL)
3319 do_clocal = true;
3320
3321 /* Wait for carrier detect and the line to become
3322 * free (i.e., not in use by the callout). While we are in
3323 * this loop, port->count is dropped by one, so that
3324 * close() knows when to free things. We restore it upon
3325 * exit, either normal or abnormal.
3326 */
3327
3328 retval = 0;
3329 add_wait_queue(&port->open_wait, &wait);
3330
3331 if (debug_level >= DEBUG_LEVEL_INFO)
3332 printk("%s(%d):%s block_til_ready() before block, count=%d\n",
3333 __FILE__,__LINE__, tty->driver->name, port->count );
3334
3335 spin_lock_irqsave(&info->lock, flags);
3336 if (!tty_hung_up_p(filp)) {
3337 extra_count = true;
3338 port->count--;
3339 }
3340 spin_unlock_irqrestore(&info->lock, flags);
3341 port->blocked_open++;
3342
3343 while (1) {
3344 if (tty->termios->c_cflag & CBAUD)
3345 tty_port_raise_dtr_rts(port);
3346
3347 set_current_state(TASK_INTERRUPTIBLE);
3348
3349 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){
3350 retval = (port->flags & ASYNC_HUP_NOTIFY) ?
3351 -EAGAIN : -ERESTARTSYS;
3352 break;
3353 }
3354
3355 cd = tty_port_carrier_raised(port);
3356
3357 if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd))
3358 break;
3359
3360 if (signal_pending(current)) {
3361 retval = -ERESTARTSYS;
3362 break;
3363 }
3364
3365 if (debug_level >= DEBUG_LEVEL_INFO)
3366 printk("%s(%d):%s block_til_ready() count=%d\n",
3367 __FILE__,__LINE__, tty->driver->name, port->count );
3368
3369 schedule();
3370 }
3371
3372 set_current_state(TASK_RUNNING);
3373 remove_wait_queue(&port->open_wait, &wait);
3374
3375 if (extra_count)
3376 port->count++;
3377 port->blocked_open--;
3378
3379 if (debug_level >= DEBUG_LEVEL_INFO)
3380 printk("%s(%d):%s block_til_ready() after, count=%d\n",
3381 __FILE__,__LINE__, tty->driver->name, port->count );
3382
3383 if (!retval)
3384 port->flags |= ASYNC_NORMAL_ACTIVE;
3385
3386 return retval;
3387 }
3388
3389 static int alloc_dma_bufs(SLMP_INFO *info)
3390 {
3391 unsigned short BuffersPerFrame;
3392 unsigned short BufferCount;
3393
3394 // Force allocation to start at 64K boundary for each port.
3395 // This is necessary because *all* buffer descriptors for a port
3396 // *must* be in the same 64K block. All descriptors on a port
3397 // share a common 'base' address (upper 8 bits of 24 bits) programmed
3398 // into the CBP register.
3399 info->port_array[0]->last_mem_alloc = (SCA_MEM_SIZE/4) * info->port_num;
3400
3401 /* Calculate the number of DMA buffers necessary to hold the */
3402 /* largest allowable frame size. Note: If the max frame size is */
3403 /* not an even multiple of the DMA buffer size then we need to */
3404 /* round the buffer count per frame up one. */
3405
3406 BuffersPerFrame = (unsigned short)(info->max_frame_size/SCABUFSIZE);
3407 if ( info->max_frame_size % SCABUFSIZE )
3408 BuffersPerFrame++;
3409
3410 /* calculate total number of data buffers (SCABUFSIZE) possible
3411 * in one ports memory (SCA_MEM_SIZE/4) after allocating memory
3412 * for the descriptor list (BUFFERLISTSIZE).
3413 */
3414 BufferCount = (SCA_MEM_SIZE/4 - BUFFERLISTSIZE)/SCABUFSIZE;
3415
3416 /* limit number of buffers to maximum amount of descriptors */
3417 if (BufferCount > BUFFERLISTSIZE/sizeof(SCADESC))
3418 BufferCount = BUFFERLISTSIZE/sizeof(SCADESC);
3419
3420 /* use enough buffers to transmit one max size frame */
3421 info->tx_buf_count = BuffersPerFrame + 1;
3422
3423 /* never use more than half the available buffers for transmit */
3424 if (info->tx_buf_count > (BufferCount/2))
3425 info->tx_buf_count = BufferCount/2;
3426
3427 if (info->tx_buf_count > SCAMAXDESC)
3428 info->tx_buf_count = SCAMAXDESC;
3429
3430 /* use remaining buffers for receive */
3431 info->rx_buf_count = BufferCount - info->tx_buf_count;
3432
3433 if (info->rx_buf_count > SCAMAXDESC)
3434 info->rx_buf_count = SCAMAXDESC;
3435
3436 if ( debug_level >= DEBUG_LEVEL_INFO )
3437 printk("%s(%d):%s Allocating %d TX and %d RX DMA buffers.\n",
3438 __FILE__,__LINE__, info->device_name,
3439 info->tx_buf_count,info->rx_buf_count);
3440
3441 if ( alloc_buf_list( info ) < 0 ||
3442 alloc_frame_bufs(info,
3443 info->rx_buf_list,
3444 info->rx_buf_list_ex,
3445 info->rx_buf_count) < 0 ||
3446 alloc_frame_bufs(info,
3447 info->tx_buf_list,
3448 info->tx_buf_list_ex,
3449 info->tx_buf_count) < 0 ||
3450 alloc_tmp_rx_buf(info) < 0 ) {
3451 printk("%s(%d):%s Can't allocate DMA buffer memory\n",
3452 __FILE__,__LINE__, info->device_name);
3453 return -ENOMEM;
3454 }
3455
3456 rx_reset_buffers( info );
3457
3458 return 0;
3459 }
3460
3461 /* Allocate DMA buffers for the transmit and receive descriptor lists.
3462 */
3463 static int alloc_buf_list(SLMP_INFO *info)
3464 {
3465 unsigned int i;
3466
3467 /* build list in adapter shared memory */
3468 info->buffer_list = info->memory_base + info->port_array[0]->last_mem_alloc;
3469 info->buffer_list_phys = info->port_array[0]->last_mem_alloc;
3470 info->port_array[0]->last_mem_alloc += BUFFERLISTSIZE;
3471
3472 memset(info->buffer_list, 0, BUFFERLISTSIZE);
3473
3474 /* Save virtual address pointers to the receive and */
3475 /* transmit buffer lists. (Receive 1st). These pointers will */
3476 /* be used by the processor to access the lists. */
3477 info->rx_buf_list = (SCADESC *)info->buffer_list;
3478
3479 info->tx_buf_list = (SCADESC *)info->buffer_list;
3480 info->tx_buf_list += info->rx_buf_count;
3481
3482 /* Build links for circular buffer entry lists (tx and rx)
3483 *
3484 * Note: links are physical addresses read by the SCA device
3485 * to determine the next buffer entry to use.
3486 */
3487
3488 for ( i = 0; i < info->rx_buf_count; i++ ) {
3489 /* calculate and store physical address of this buffer entry */
3490 info->rx_buf_list_ex[i].phys_entry =
3491 info->buffer_list_phys + (i * sizeof(SCABUFSIZE));
3492
3493 /* calculate and store physical address of */
3494 /* next entry in cirular list of entries */
3495 info->rx_buf_list[i].next = info->buffer_list_phys;
3496 if ( i < info->rx_buf_count - 1 )
3497 info->rx_buf_list[i].next += (i + 1) * sizeof(SCADESC);
3498
3499 info->rx_buf_list[i].length = SCABUFSIZE;
3500 }
3501
3502 for ( i = 0; i < info->tx_buf_count; i++ ) {
3503 /* calculate and store physical address of this buffer entry */
3504 info->tx_buf_list_ex[i].phys_entry = info->buffer_list_phys +
3505 ((info->rx_buf_count + i) * sizeof(SCADESC));
3506
3507 /* calculate and store physical address of */
3508 /* next entry in cirular list of entries */
3509
3510 info->tx_buf_list[i].next = info->buffer_list_phys +
3511 info->rx_buf_count * sizeof(SCADESC);
3512
3513 if ( i < info->tx_buf_count - 1 )
3514 info->tx_buf_list[i].next += (i + 1) * sizeof(SCADESC);
3515 }
3516
3517 return 0;
3518 }
3519
3520 /* Allocate the frame DMA buffers used by the specified buffer list.
3521 */
3522 static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *buf_list,SCADESC_EX *buf_list_ex,int count)
3523 {
3524 int i;
3525 unsigned long phys_addr;
3526
3527 for ( i = 0; i < count; i++ ) {
3528 buf_list_ex[i].virt_addr = info->memory_base + info->port_array[0]->last_mem_alloc;
3529 phys_addr = info->port_array[0]->last_mem_alloc;
3530 info->port_array[0]->last_mem_alloc += SCABUFSIZE;
3531
3532 buf_list[i].buf_ptr = (unsigned short)phys_addr;
3533 buf_list[i].buf_base = (unsigned char)(phys_addr >> 16);
3534 }
3535
3536 return 0;
3537 }
3538
3539 static void free_dma_bufs(SLMP_INFO *info)
3540 {
3541 info->buffer_list = NULL;
3542 info->rx_buf_list = NULL;
3543 info->tx_buf_list = NULL;
3544 }
3545
3546 /* allocate buffer large enough to hold max_frame_size.
3547 * This buffer is used to pass an assembled frame to the line discipline.
3548 */
3549 static int alloc_tmp_rx_buf(SLMP_INFO *info)
3550 {
3551 info->tmp_rx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
3552 if (info->tmp_rx_buf == NULL)
3553 return -ENOMEM;
3554 return 0;
3555 }
3556
3557 static void free_tmp_rx_buf(SLMP_INFO *info)
3558 {
3559 kfree(info->tmp_rx_buf);
3560 info->tmp_rx_buf = NULL;
3561 }
3562
3563 static int claim_resources(SLMP_INFO *info)
3564 {
3565 if (request_mem_region(info->phys_memory_base,SCA_MEM_SIZE,"synclinkmp") == NULL) {
3566 printk( "%s(%d):%s mem addr conflict, Addr=%08X\n",
3567 __FILE__,__LINE__,info->device_name, info->phys_memory_base);
3568 info->init_error = DiagStatus_AddressConflict;
3569 goto errout;
3570 }
3571 else
3572 info->shared_mem_requested = true;
3573
3574 if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclinkmp") == NULL) {
3575 printk( "%s(%d):%s lcr mem addr conflict, Addr=%08X\n",
3576 __FILE__,__LINE__,info->device_name, info->phys_lcr_base);
3577 info->init_error = DiagStatus_AddressConflict;
3578 goto errout;
3579 }
3580 else
3581 info->lcr_mem_requested = true;
3582
3583 if (request_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE,"synclinkmp") == NULL) {
3584 printk( "%s(%d):%s sca mem addr conflict, Addr=%08X\n",
3585 __FILE__,__LINE__,info->device_name, info->phys_sca_base);
3586 info->init_error = DiagStatus_AddressConflict;
3587 goto errout;
3588 }
3589 else
3590 info->sca_base_requested = true;
3591
3592 if (request_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE,"synclinkmp") == NULL) {
3593 printk( "%s(%d):%s stat/ctrl mem addr conflict, Addr=%08X\n",
3594 __FILE__,__LINE__,info->device_name, info->phys_statctrl_base);
3595 info->init_error = DiagStatus_AddressConflict;
3596 goto errout;
3597 }
3598 else
3599 info->sca_statctrl_requested = true;
3600
3601 info->memory_base = ioremap_nocache(info->phys_memory_base,
3602 SCA_MEM_SIZE);
3603 if (!info->memory_base) {
3604 printk( "%s(%d):%s Cant map shared memory, MemAddr=%08X\n",
3605 __FILE__,__LINE__,info->device_name, info->phys_memory_base );
3606 info->init_error = DiagStatus_CantAssignPciResources;
3607 goto errout;
3608 }
3609
3610 info->lcr_base = ioremap_nocache(info->phys_lcr_base, PAGE_SIZE);
3611 if (!info->lcr_base) {
3612 printk( "%s(%d):%s Cant map LCR memory, MemAddr=%08X\n",
3613 __FILE__,__LINE__,info->device_name, info->phys_lcr_base );
3614 info->init_error = DiagStatus_CantAssignPciResources;
3615 goto errout;
3616 }
3617 info->lcr_base += info->lcr_offset;
3618
3619 info->sca_base = ioremap_nocache(info->phys_sca_base, PAGE_SIZE);
3620 if (!info->sca_base) {
3621 printk( "%s(%d):%s Cant map SCA memory, MemAddr=%08X\n",
3622 __FILE__,__LINE__,info->device_name, info->phys_sca_base );
3623 info->init_error = DiagStatus_CantAssignPciResources;
3624 goto errout;
3625 }
3626 info->sca_base += info->sca_offset;
3627
3628 info->statctrl_base = ioremap_nocache(info->phys_statctrl_base,
3629 PAGE_SIZE);
3630 if (!info->statctrl_base) {
3631 printk( "%s(%d):%s Cant map SCA Status/Control memory, MemAddr=%08X\n",
3632 __FILE__,__LINE__,info->device_name, info->phys_statctrl_base );
3633 info->init_error = DiagStatus_CantAssignPciResources;
3634 goto errout;
3635 }
3636 info->statctrl_base += info->statctrl_offset;
3637
3638 if ( !memory_test(info) ) {
3639 printk( "%s(%d):Shared Memory Test failed for device %s MemAddr=%08X\n",
3640 __FILE__,__LINE__,info->device_name, info->phys_memory_base );
3641 info->init_error = DiagStatus_MemoryError;
3642 goto errout;
3643 }
3644
3645 return 0;
3646
3647 errout:
3648 release_resources( info );
3649 return -ENODEV;
3650 }
3651
3652 static void release_resources(SLMP_INFO *info)
3653 {
3654 if ( debug_level >= DEBUG_LEVEL_INFO )
3655 printk( "%s(%d):%s release_resources() entry\n",
3656 __FILE__,__LINE__,info->device_name );
3657
3658 if ( info->irq_requested ) {
3659 free_irq(info->irq_level, info);
3660 info->irq_requested = false;
3661 }
3662
3663 if ( info->shared_mem_requested ) {
3664 release_mem_region(info->phys_memory_base,SCA_MEM_SIZE);
3665 info->shared_mem_requested = false;
3666 }
3667 if ( info->lcr_mem_requested ) {
3668 release_mem_region(info->phys_lcr_base + info->lcr_offset,128);
3669 info->lcr_mem_requested = false;
3670 }
3671 if ( info->sca_base_requested ) {
3672 release_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE);
3673 info->sca_base_requested = false;
3674 }
3675 if ( info->sca_statctrl_requested ) {
3676 release_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE);
3677 info->sca_statctrl_requested = false;
3678 }
3679
3680 if (info->memory_base){
3681 iounmap(info->memory_base);
3682 info->memory_base = NULL;
3683 }
3684
3685 if (info->sca_base) {
3686 iounmap(info->sca_base - info->sca_offset);
3687 info->sca_base=NULL;
3688 }
3689
3690 if (info->statctrl_base) {
3691 iounmap(info->statctrl_base - info->statctrl_offset);
3692 info->statctrl_base=NULL;
3693 }
3694
3695 if (info->lcr_base){
3696 iounmap(info->lcr_base - info->lcr_offset);
3697 info->lcr_base = NULL;
3698 }
3699
3700 if ( debug_level >= DEBUG_LEVEL_INFO )
3701 printk( "%s(%d):%s release_resources() exit\n",
3702 __FILE__,__LINE__,info->device_name );
3703 }
3704
3705 /* Add the specified device instance data structure to the
3706 * global linked list of devices and increment the device count.
3707 */
3708 static void add_device(SLMP_INFO *info)
3709 {
3710 info->next_device = NULL;
3711 info->line = synclinkmp_device_count;
3712 sprintf(info->device_name,"ttySLM%dp%d",info->adapter_num,info->port_num);
3713
3714 if (info->line < MAX_DEVICES) {
3715 if (maxframe[info->line])
3716 info->max_frame_size = maxframe[info->line];
3717 }
3718
3719 synclinkmp_device_count++;
3720
3721 if ( !synclinkmp_device_list )
3722 synclinkmp_device_list = info;
3723 else {
3724 SLMP_INFO *current_dev = synclinkmp_device_list;
3725 while( current_dev->next_device )
3726 current_dev = current_dev->next_device;
3727 current_dev->next_device = info;
3728 }
3729
3730 if ( info->max_frame_size < 4096 )
3731 info->max_frame_size = 4096;
3732 else if ( info->max_frame_size > 65535 )
3733 info->max_frame_size = 65535;
3734
3735 printk( "SyncLink MultiPort %s: "
3736 "Mem=(%08x %08X %08x %08X) IRQ=%d MaxFrameSize=%u\n",
3737 info->device_name,
3738 info->phys_sca_base,
3739 info->phys_memory_base,
3740 info->phys_statctrl_base,
3741 info->phys_lcr_base,
3742 info->irq_level,
3743 info->max_frame_size );
3744
3745 #if SYNCLINK_GENERIC_HDLC
3746 hdlcdev_init(info);
3747 #endif
3748 }
3749
3750 static const struct tty_port_operations port_ops = {
3751 .carrier_raised = carrier_raised,
3752 .dtr_rts = dtr_rts,
3753 };
3754
3755 /* Allocate and initialize a device instance structure
3756 *
3757 * Return Value: pointer to SLMP_INFO if success, otherwise NULL
3758 */
3759 static SLMP_INFO *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev)
3760 {
3761 SLMP_INFO *info;
3762
3763 info = kzalloc(sizeof(SLMP_INFO),
3764 GFP_KERNEL);
3765
3766 if (!info) {
3767 printk("%s(%d) Error can't allocate device instance data for adapter %d, port %d\n",
3768 __FILE__,__LINE__, adapter_num, port_num);
3769 } else {
3770 tty_port_init(&info->port);
3771 info->port.ops = &port_ops;
3772 info->magic = MGSL_MAGIC;
3773 INIT_WORK(&info->task, bh_handler);
3774 info->max_frame_size = 4096;
3775 info->port.close_delay = 5*HZ/10;
3776 info->port.closing_wait = 30*HZ;
3777 init_waitqueue_head(&info->status_event_wait_q);
3778 init_waitqueue_head(&info->event_wait_q);
3779 spin_lock_init(&info->netlock);
3780 memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
3781 info->idle_mode = HDLC_TXIDLE_FLAGS;
3782 info->adapter_num = adapter_num;
3783 info->port_num = port_num;
3784
3785 /* Copy configuration info to device instance data */
3786 info->irq_level = pdev->irq;
3787 info->phys_lcr_base = pci_resource_start(pdev,0);
3788 info->phys_sca_base = pci_resource_start(pdev,2);
3789 info->phys_memory_base = pci_resource_start(pdev,3);
3790 info->phys_statctrl_base = pci_resource_start(pdev,4);
3791
3792 /* Because veremap only works on page boundaries we must map
3793 * a larger area than is actually implemented for the LCR
3794 * memory range. We map a full page starting at the page boundary.
3795 */
3796 info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1);
3797 info->phys_lcr_base &= ~(PAGE_SIZE-1);
3798
3799 info->sca_offset = info->phys_sca_base & (PAGE_SIZE-1);
3800 info->phys_sca_base &= ~(PAGE_SIZE-1);
3801
3802 info->statctrl_offset = info->phys_statctrl_base & (PAGE_SIZE-1);
3803 info->phys_statctrl_base &= ~(PAGE_SIZE-1);
3804
3805 info->bus_type = MGSL_BUS_TYPE_PCI;
3806 info->irq_flags = IRQF_SHARED;
3807
3808 setup_timer(&info->tx_timer, tx_timeout, (unsigned long)info);
3809 setup_timer(&info->status_timer, status_timeout,
3810 (unsigned long)info);
3811
3812 /* Store the PCI9050 misc control register value because a flaw
3813 * in the PCI9050 prevents LCR registers from being read if
3814 * BIOS assigns an LCR base address with bit 7 set.
3815 *
3816 * Only the misc control register is accessed for which only
3817 * write access is needed, so set an initial value and change
3818 * bits to the device instance data as we write the value
3819 * to the actual misc control register.
3820 */
3821 info->misc_ctrl_value = 0x087e4546;
3822
3823 /* initial port state is unknown - if startup errors
3824 * occur, init_error will be set to indicate the
3825 * problem. Once the port is fully initialized,
3826 * this value will be set to 0 to indicate the
3827 * port is available.
3828 */
3829 info->init_error = -1;
3830 }
3831
3832 return info;
3833 }
3834
3835 static void device_init(int adapter_num, struct pci_dev *pdev)
3836 {
3837 SLMP_INFO *port_array[SCA_MAX_PORTS];
3838 int port;
3839
3840 /* allocate device instances for up to SCA_MAX_PORTS devices */
3841 for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
3842 port_array[port] = alloc_dev(adapter_num,port,pdev);
3843 if( port_array[port] == NULL ) {
3844 for ( --port; port >= 0; --port )
3845 kfree(port_array[port]);
3846 return;
3847 }
3848 }
3849
3850 /* give copy of port_array to all ports and add to device list */
3851 for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
3852 memcpy(port_array[port]->port_array,port_array,sizeof(port_array));
3853 add_device( port_array[port] );
3854 spin_lock_init(&port_array[port]->lock);
3855 }
3856
3857 /* Allocate and claim adapter resources */
3858 if ( !claim_resources(port_array[0]) ) {
3859
3860 alloc_dma_bufs(port_array[0]);
3861
3862 /* copy resource information from first port to others */
3863 for ( port = 1; port < SCA_MAX_PORTS; ++port ) {
3864 port_array[port]->lock = port_array[0]->lock;
3865 port_array[port]->irq_level = port_array[0]->irq_level;
3866 port_array[port]->memory_base = port_array[0]->memory_base;
3867 port_array[port]->sca_base = port_array[0]->sca_base;
3868 port_array[port]->statctrl_base = port_array[0]->statctrl_base;
3869 port_array[port]->lcr_base = port_array[0]->lcr_base;
3870 alloc_dma_bufs(port_array[port]);
3871 }
3872
3873 if ( request_irq(port_array[0]->irq_level,
3874 synclinkmp_interrupt,
3875 port_array[0]->irq_flags,
3876 port_array[0]->device_name,
3877 port_array[0]) < 0 ) {
3878 printk( "%s(%d):%s Cant request interrupt, IRQ=%d\n",
3879 __FILE__,__LINE__,
3880 port_array[0]->device_name,
3881 port_array[0]->irq_level );
3882 }
3883 else {
3884 port_array[0]->irq_requested = true;
3885 adapter_test(port_array[0]);
3886 }
3887 }
3888 }
3889
3890 static const struct tty_operations ops = {
3891 .open = open,
3892 .close = close,
3893 .write = write,
3894 .put_char = put_char,
3895 .flush_chars = flush_chars,
3896 .write_room = write_room,
3897 .chars_in_buffer = chars_in_buffer,
3898 .flush_buffer = flush_buffer,
3899 .ioctl = ioctl,
3900 .throttle = throttle,
3901 .unthrottle = unthrottle,
3902 .send_xchar = send_xchar,
3903 .break_ctl = set_break,
3904 .wait_until_sent = wait_until_sent,
3905 .set_termios = set_termios,
3906 .stop = tx_hold,
3907 .start = tx_release,
3908 .hangup = hangup,
3909 .tiocmget = tiocmget,
3910 .tiocmset = tiocmset,
3911 .proc_fops = &synclinkmp_proc_fops,
3912 };
3913
3914
3915 static void synclinkmp_cleanup(void)
3916 {
3917 int rc;
3918 SLMP_INFO *info;
3919 SLMP_INFO *tmp;
3920
3921 printk("Unloading %s %s\n", driver_name, driver_version);
3922
3923 if (serial_driver) {
3924 if ((rc = tty_unregister_driver(serial_driver)))
3925 printk("%s(%d) failed to unregister tty driver err=%d\n",
3926 __FILE__,__LINE__,rc);
3927 put_tty_driver(serial_driver);
3928 }
3929
3930 /* reset devices */
3931 info = synclinkmp_device_list;
3932 while(info) {
3933 reset_port(info);
3934 info = info->next_device;
3935 }
3936
3937 /* release devices */
3938 info = synclinkmp_device_list;
3939 while(info) {
3940 #if SYNCLINK_GENERIC_HDLC
3941 hdlcdev_exit(info);
3942 #endif
3943 free_dma_bufs(info);
3944 free_tmp_rx_buf(info);
3945 if ( info->port_num == 0 ) {
3946 if (info->sca_base)
3947 write_reg(info, LPR, 1); /* set low power mode */
3948 release_resources(info);
3949 }
3950 tmp = info;
3951 info = info->next_device;
3952 kfree(tmp);
3953 }
3954
3955 pci_unregister_driver(&synclinkmp_pci_driver);
3956 }
3957
3958 /* Driver initialization entry point.
3959 */
3960
3961 static int __init synclinkmp_init(void)
3962 {
3963 int rc;
3964
3965 if (break_on_load) {
3966 synclinkmp_get_text_ptr();
3967 BREAKPOINT();
3968 }
3969
3970 printk("%s %s\n", driver_name, driver_version);
3971
3972 if ((rc = pci_register_driver(&synclinkmp_pci_driver)) < 0) {
3973 printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc);
3974 return rc;
3975 }
3976
3977 serial_driver = alloc_tty_driver(128);
3978 if (!serial_driver) {
3979 rc = -ENOMEM;
3980 goto error;
3981 }
3982
3983 /* Initialize the tty_driver structure */
3984
3985 serial_driver->owner = THIS_MODULE;
3986 serial_driver->driver_name = "synclinkmp";
3987 serial_driver->name = "ttySLM";
3988 serial_driver->major = ttymajor;
3989 serial_driver->minor_start = 64;
3990 serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
3991 serial_driver->subtype = SERIAL_TYPE_NORMAL;
3992 serial_driver->init_termios = tty_std_termios;
3993 serial_driver->init_termios.c_cflag =
3994 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
3995 serial_driver->init_termios.c_ispeed = 9600;
3996 serial_driver->init_termios.c_ospeed = 9600;
3997 serial_driver->flags = TTY_DRIVER_REAL_RAW;
3998 tty_set_operations(serial_driver, &ops);
3999 if ((rc = tty_register_driver(serial_driver)) < 0) {
4000 printk("%s(%d):Couldn't register serial driver\n",
4001 __FILE__,__LINE__);
4002 put_tty_driver(serial_driver);
4003 serial_driver = NULL;
4004 goto error;
4005 }
4006
4007 printk("%s %s, tty major#%d\n",
4008 driver_name, driver_version,
4009 serial_driver->major);
4010
4011 return 0;
4012
4013 error:
4014 synclinkmp_cleanup();
4015 return rc;
4016 }
4017
4018 static void __exit synclinkmp_exit(void)
4019 {
4020 synclinkmp_cleanup();
4021 }
4022
4023 module_init(synclinkmp_init);
4024 module_exit(synclinkmp_exit);
4025
4026 /* Set the port for internal loopback mode.
4027 * The TxCLK and RxCLK signals are generated from the BRG and
4028 * the TxD is looped back to the RxD internally.
4029 */
4030 static void enable_loopback(SLMP_INFO *info, int enable)
4031 {
4032 if (enable) {
4033 /* MD2 (Mode Register 2)
4034 * 01..00 CNCT<1..0> Channel Connection 11=Local Loopback
4035 */
4036 write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) | (BIT1 + BIT0)));
4037
4038 /* degate external TxC clock source */
4039 info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
4040 write_control_reg(info);
4041
4042 /* RXS/TXS (Rx/Tx clock source)
4043 * 07 Reserved, must be 0
4044 * 06..04 Clock Source, 100=BRG
4045 * 03..00 Clock Divisor, 0000=1
4046 */
4047 write_reg(info, RXS, 0x40);
4048 write_reg(info, TXS, 0x40);
4049
4050 } else {
4051 /* MD2 (Mode Register 2)
4052 * 01..00 CNCT<1..0> Channel connection, 0=normal
4053 */
4054 write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) & ~(BIT1 + BIT0)));
4055
4056 /* RXS/TXS (Rx/Tx clock source)
4057 * 07 Reserved, must be 0
4058 * 06..04 Clock Source, 000=RxC/TxC Pin
4059 * 03..00 Clock Divisor, 0000=1
4060 */
4061 write_reg(info, RXS, 0x00);
4062 write_reg(info, TXS, 0x00);
4063 }
4064
4065 /* set LinkSpeed if available, otherwise default to 2Mbps */
4066 if (info->params.clock_speed)
4067 set_rate(info, info->params.clock_speed);
4068 else
4069 set_rate(info, 3686400);
4070 }
4071
4072 /* Set the baud rate register to the desired speed
4073 *
4074 * data_rate data rate of clock in bits per second
4075 * A data rate of 0 disables the AUX clock.
4076 */
4077 static void set_rate( SLMP_INFO *info, u32 data_rate )
4078 {
4079 u32 TMCValue;
4080 unsigned char BRValue;
4081 u32 Divisor=0;
4082
4083 /* fBRG = fCLK/(TMC * 2^BR)
4084 */
4085 if (data_rate != 0) {
4086 Divisor = 14745600/data_rate;
4087 if (!Divisor)
4088 Divisor = 1;
4089
4090 TMCValue = Divisor;
4091
4092 BRValue = 0;
4093 if (TMCValue != 1 && TMCValue != 2) {
4094 /* BRValue of 0 provides 50/50 duty cycle *only* when
4095 * TMCValue is 1 or 2. BRValue of 1 to 9 always provides
4096 * 50/50 duty cycle.
4097 */
4098 BRValue = 1;
4099 TMCValue >>= 1;
4100 }
4101
4102 /* while TMCValue is too big for TMC register, divide
4103 * by 2 and increment BR exponent.
4104 */
4105 for(; TMCValue > 256 && BRValue < 10; BRValue++)
4106 TMCValue >>= 1;
4107
4108 write_reg(info, TXS,
4109 (unsigned char)((read_reg(info, TXS) & 0xf0) | BRValue));
4110 write_reg(info, RXS,
4111 (unsigned char)((read_reg(info, RXS) & 0xf0) | BRValue));
4112 write_reg(info, TMC, (unsigned char)TMCValue);
4113 }
4114 else {
4115 write_reg(info, TXS,0);
4116 write_reg(info, RXS,0);
4117 write_reg(info, TMC, 0);
4118 }
4119 }
4120
4121 /* Disable receiver
4122 */
4123 static void rx_stop(SLMP_INFO *info)
4124 {
4125 if (debug_level >= DEBUG_LEVEL_ISR)
4126 printk("%s(%d):%s rx_stop()\n",
4127 __FILE__,__LINE__, info->device_name );
4128
4129 write_reg(info, CMD, RXRESET);
4130
4131 info->ie0_value &= ~RXRDYE;
4132 write_reg(info, IE0, info->ie0_value); /* disable Rx data interrupts */
4133
4134 write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */
4135 write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */
4136 write_reg(info, RXDMA + DIR, 0); /* disable Rx DMA interrupts */
4137
4138 info->rx_enabled = false;
4139 info->rx_overflow = false;
4140 }
4141
4142 /* enable the receiver
4143 */
4144 static void rx_start(SLMP_INFO *info)
4145 {
4146 int i;
4147
4148 if (debug_level >= DEBUG_LEVEL_ISR)
4149 printk("%s(%d):%s rx_start()\n",
4150 __FILE__,__LINE__, info->device_name );
4151
4152 write_reg(info, CMD, RXRESET);
4153
4154 if ( info->params.mode == MGSL_MODE_HDLC ) {
4155 /* HDLC, disabe IRQ on rxdata */
4156 info->ie0_value &= ~RXRDYE;
4157 write_reg(info, IE0, info->ie0_value);
4158
4159 /* Reset all Rx DMA buffers and program rx dma */
4160 write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */
4161 write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */
4162
4163 for (i = 0; i < info->rx_buf_count; i++) {
4164 info->rx_buf_list[i].status = 0xff;
4165
4166 // throttle to 4 shared memory writes at a time to prevent
4167 // hogging local bus (keep latency time for DMA requests low).
4168 if (!(i % 4))
4169 read_status_reg(info);
4170 }
4171 info->current_rx_buf = 0;
4172
4173 /* set current/1st descriptor address */
4174 write_reg16(info, RXDMA + CDA,
4175 info->rx_buf_list_ex[0].phys_entry);
4176
4177 /* set new last rx descriptor address */
4178 write_reg16(info, RXDMA + EDA,
4179 info->rx_buf_list_ex[info->rx_buf_count - 1].phys_entry);
4180
4181 /* set buffer length (shared by all rx dma data buffers) */
4182 write_reg16(info, RXDMA + BFL, SCABUFSIZE);
4183
4184 write_reg(info, RXDMA + DIR, 0x60); /* enable Rx DMA interrupts (EOM/BOF) */
4185 write_reg(info, RXDMA + DSR, 0xf2); /* clear Rx DMA IRQs, enable Rx DMA */
4186 } else {
4187 /* async, enable IRQ on rxdata */
4188 info->ie0_value |= RXRDYE;
4189 write_reg(info, IE0, info->ie0_value);
4190 }
4191
4192 write_reg(info, CMD, RXENABLE);
4193
4194 info->rx_overflow = false;
4195 info->rx_enabled = true;
4196 }
4197
4198 /* Enable the transmitter and send a transmit frame if
4199 * one is loaded in the DMA buffers.
4200 */
4201 static void tx_start(SLMP_INFO *info)
4202 {
4203 if (debug_level >= DEBUG_LEVEL_ISR)
4204 printk("%s(%d):%s tx_start() tx_count=%d\n",
4205 __FILE__,__LINE__, info->device_name,info->tx_count );
4206
4207 if (!info->tx_enabled ) {
4208 write_reg(info, CMD, TXRESET);
4209 write_reg(info, CMD, TXENABLE);
4210 info->tx_enabled = true;
4211 }
4212
4213 if ( info->tx_count ) {
4214
4215 /* If auto RTS enabled and RTS is inactive, then assert */
4216 /* RTS and set a flag indicating that the driver should */
4217 /* negate RTS when the transmission completes. */
4218
4219 info->drop_rts_on_tx_done = false;
4220
4221 if (info->params.mode != MGSL_MODE_ASYNC) {
4222
4223 if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) {
4224 get_signals( info );
4225 if ( !(info->serial_signals & SerialSignal_RTS) ) {
4226 info->serial_signals |= SerialSignal_RTS;
4227 set_signals( info );
4228 info->drop_rts_on_tx_done = true;
4229 }
4230 }
4231
4232 write_reg16(info, TRC0,
4233 (unsigned short)(((tx_negate_fifo_level-1)<<8) + tx_active_fifo_level));
4234
4235 write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
4236 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
4237
4238 /* set TX CDA (current descriptor address) */
4239 write_reg16(info, TXDMA + CDA,
4240 info->tx_buf_list_ex[0].phys_entry);
4241
4242 /* set TX EDA (last descriptor address) */
4243 write_reg16(info, TXDMA + EDA,
4244 info->tx_buf_list_ex[info->last_tx_buf].phys_entry);
4245
4246 /* enable underrun IRQ */
4247 info->ie1_value &= ~IDLE;
4248 info->ie1_value |= UDRN;
4249 write_reg(info, IE1, info->ie1_value);
4250 write_reg(info, SR1, (unsigned char)(IDLE + UDRN));
4251
4252 write_reg(info, TXDMA + DIR, 0x40); /* enable Tx DMA interrupts (EOM) */
4253 write_reg(info, TXDMA + DSR, 0xf2); /* clear Tx DMA IRQs, enable Tx DMA */
4254
4255 mod_timer(&info->tx_timer, jiffies +
4256 msecs_to_jiffies(5000));
4257 }
4258 else {
4259 tx_load_fifo(info);
4260 /* async, enable IRQ on txdata */
4261 info->ie0_value |= TXRDYE;
4262 write_reg(info, IE0, info->ie0_value);
4263 }
4264
4265 info->tx_active = true;
4266 }
4267 }
4268
4269 /* stop the transmitter and DMA
4270 */
4271 static void tx_stop( SLMP_INFO *info )
4272 {
4273 if (debug_level >= DEBUG_LEVEL_ISR)
4274 printk("%s(%d):%s tx_stop()\n",
4275 __FILE__,__LINE__, info->device_name );
4276
4277 del_timer(&info->tx_timer);
4278
4279 write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
4280 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
4281
4282 write_reg(info, CMD, TXRESET);
4283
4284 info->ie1_value &= ~(UDRN + IDLE);
4285 write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */
4286 write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */
4287
4288 info->ie0_value &= ~TXRDYE;
4289 write_reg(info, IE0, info->ie0_value); /* disable tx data interrupts */
4290
4291 info->tx_enabled = false;
4292 info->tx_active = false;
4293 }
4294
4295 /* Fill the transmit FIFO until the FIFO is full or
4296 * there is no more data to load.
4297 */
4298 static void tx_load_fifo(SLMP_INFO *info)
4299 {
4300 u8 TwoBytes[2];
4301
4302 /* do nothing is now tx data available and no XON/XOFF pending */
4303
4304 if ( !info->tx_count && !info->x_char )
4305 return;
4306
4307 /* load the Transmit FIFO until FIFOs full or all data sent */
4308
4309 while( info->tx_count && (read_reg(info,SR0) & BIT1) ) {
4310
4311 /* there is more space in the transmit FIFO and */
4312 /* there is more data in transmit buffer */
4313
4314 if ( (info->tx_count > 1) && !info->x_char ) {
4315 /* write 16-bits */
4316 TwoBytes[0] = info->tx_buf[info->tx_get++];
4317 if (info->tx_get >= info->max_frame_size)
4318 info->tx_get -= info->max_frame_size;
4319 TwoBytes[1] = info->tx_buf[info->tx_get++];
4320 if (info->tx_get >= info->max_frame_size)
4321 info->tx_get -= info->max_frame_size;
4322
4323 write_reg16(info, TRB, *((u16 *)TwoBytes));
4324
4325 info->tx_count -= 2;
4326 info->icount.tx += 2;
4327 } else {
4328 /* only 1 byte left to transmit or 1 FIFO slot left */
4329
4330 if (info->x_char) {
4331 /* transmit pending high priority char */
4332 write_reg(info, TRB, info->x_char);
4333 info->x_char = 0;
4334 } else {
4335 write_reg(info, TRB, info->tx_buf[info->tx_get++]);
4336 if (info->tx_get >= info->max_frame_size)
4337 info->tx_get -= info->max_frame_size;
4338 info->tx_count--;
4339 }
4340 info->icount.tx++;
4341 }
4342 }
4343 }
4344
4345 /* Reset a port to a known state
4346 */
4347 static void reset_port(SLMP_INFO *info)
4348 {
4349 if (info->sca_base) {
4350
4351 tx_stop(info);
4352 rx_stop(info);
4353
4354 info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
4355 set_signals(info);
4356
4357 /* disable all port interrupts */
4358 info->ie0_value = 0;
4359 info->ie1_value = 0;
4360 info->ie2_value = 0;
4361 write_reg(info, IE0, info->ie0_value);
4362 write_reg(info, IE1, info->ie1_value);
4363 write_reg(info, IE2, info->ie2_value);
4364
4365 write_reg(info, CMD, CHRESET);
4366 }
4367 }
4368
4369 /* Reset all the ports to a known state.
4370 */
4371 static void reset_adapter(SLMP_INFO *info)
4372 {
4373 int i;
4374
4375 for ( i=0; i < SCA_MAX_PORTS; ++i) {
4376 if (info->port_array[i])
4377 reset_port(info->port_array[i]);
4378 }
4379 }
4380
4381 /* Program port for asynchronous communications.
4382 */
4383 static void async_mode(SLMP_INFO *info)
4384 {
4385
4386 unsigned char RegValue;
4387
4388 tx_stop(info);
4389 rx_stop(info);
4390
4391 /* MD0, Mode Register 0
4392 *
4393 * 07..05 PRCTL<2..0>, Protocol Mode, 000=async
4394 * 04 AUTO, Auto-enable (RTS/CTS/DCD)
4395 * 03 Reserved, must be 0
4396 * 02 CRCCC, CRC Calculation, 0=disabled
4397 * 01..00 STOP<1..0> Stop bits (00=1,10=2)
4398 *
4399 * 0000 0000
4400 */
4401 RegValue = 0x00;
4402 if (info->params.stop_bits != 1)
4403 RegValue |= BIT1;
4404 write_reg(info, MD0, RegValue);
4405
4406 /* MD1, Mode Register 1
4407 *
4408 * 07..06 BRATE<1..0>, bit rate, 00=1/1 01=1/16 10=1/32 11=1/64
4409 * 05..04 TXCHR<1..0>, tx char size, 00=8 bits,01=7,10=6,11=5
4410 * 03..02 RXCHR<1..0>, rx char size
4411 * 01..00 PMPM<1..0>, Parity mode, 00=none 10=even 11=odd
4412 *
4413 * 0100 0000
4414 */
4415 RegValue = 0x40;
4416 switch (info->params.data_bits) {
4417 case 7: RegValue |= BIT4 + BIT2; break;
4418 case 6: RegValue |= BIT5 + BIT3; break;
4419 case 5: RegValue |= BIT5 + BIT4 + BIT3 + BIT2; break;
4420 }
4421 if (info->params.parity != ASYNC_PARITY_NONE) {
4422 RegValue |= BIT1;
4423 if (info->params.parity == ASYNC_PARITY_ODD)
4424 RegValue |= BIT0;
4425 }
4426 write_reg(info, MD1, RegValue);
4427
4428 /* MD2, Mode Register 2
4429 *
4430 * 07..02 Reserved, must be 0
4431 * 01..00 CNCT<1..0> Channel connection, 00=normal 11=local loopback
4432 *
4433 * 0000 0000
4434 */
4435 RegValue = 0x00;
4436 if (info->params.loopback)
4437 RegValue |= (BIT1 + BIT0);
4438 write_reg(info, MD2, RegValue);
4439
4440 /* RXS, Receive clock source
4441 *
4442 * 07 Reserved, must be 0
4443 * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
4444 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4445 */
4446 RegValue=BIT6;
4447 write_reg(info, RXS, RegValue);
4448
4449 /* TXS, Transmit clock source
4450 *
4451 * 07 Reserved, must be 0
4452 * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
4453 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4454 */
4455 RegValue=BIT6;
4456 write_reg(info, TXS, RegValue);
4457
4458 /* Control Register
4459 *
4460 * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
4461 */
4462 info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
4463 write_control_reg(info);
4464
4465 tx_set_idle(info);
4466
4467 /* RRC Receive Ready Control 0
4468 *
4469 * 07..05 Reserved, must be 0
4470 * 04..00 RRC<4..0> Rx FIFO trigger active 0x00 = 1 byte
4471 */
4472 write_reg(info, RRC, 0x00);
4473
4474 /* TRC0 Transmit Ready Control 0
4475 *
4476 * 07..05 Reserved, must be 0
4477 * 04..00 TRC<4..0> Tx FIFO trigger active 0x10 = 16 bytes
4478 */
4479 write_reg(info, TRC0, 0x10);
4480
4481 /* TRC1 Transmit Ready Control 1
4482 *
4483 * 07..05 Reserved, must be 0
4484 * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1e = 31 bytes (full-1)
4485 */
4486 write_reg(info, TRC1, 0x1e);
4487
4488 /* CTL, MSCI control register
4489 *
4490 * 07..06 Reserved, set to 0
4491 * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
4492 * 04 IDLC, idle control, 0=mark 1=idle register
4493 * 03 BRK, break, 0=off 1 =on (async)
4494 * 02 SYNCLD, sync char load enable (BSC) 1=enabled
4495 * 01 GOP, go active on poll (LOOP mode) 1=enabled
4496 * 00 RTS, RTS output control, 0=active 1=inactive
4497 *
4498 * 0001 0001
4499 */
4500 RegValue = 0x10;
4501 if (!(info->serial_signals & SerialSignal_RTS))
4502 RegValue |= 0x01;
4503 write_reg(info, CTL, RegValue);
4504
4505 /* enable status interrupts */
4506 info->ie0_value |= TXINTE + RXINTE;
4507 write_reg(info, IE0, info->ie0_value);
4508
4509 /* enable break detect interrupt */
4510 info->ie1_value = BRKD;
4511 write_reg(info, IE1, info->ie1_value);
4512
4513 /* enable rx overrun interrupt */
4514 info->ie2_value = OVRN;
4515 write_reg(info, IE2, info->ie2_value);
4516
4517 set_rate( info, info->params.data_rate * 16 );
4518 }
4519
4520 /* Program the SCA for HDLC communications.
4521 */
4522 static void hdlc_mode(SLMP_INFO *info)
4523 {
4524 unsigned char RegValue;
4525 u32 DpllDivisor;
4526
4527 // Can't use DPLL because SCA outputs recovered clock on RxC when
4528 // DPLL mode selected. This causes output contention with RxC receiver.
4529 // Use of DPLL would require external hardware to disable RxC receiver
4530 // when DPLL mode selected.
4531 info->params.flags &= ~(HDLC_FLAG_TXC_DPLL + HDLC_FLAG_RXC_DPLL);
4532
4533 /* disable DMA interrupts */
4534 write_reg(info, TXDMA + DIR, 0);
4535 write_reg(info, RXDMA + DIR, 0);
4536
4537 /* MD0, Mode Register 0
4538 *
4539 * 07..05 PRCTL<2..0>, Protocol Mode, 100=HDLC
4540 * 04 AUTO, Auto-enable (RTS/CTS/DCD)
4541 * 03 Reserved, must be 0
4542 * 02 CRCCC, CRC Calculation, 1=enabled
4543 * 01 CRC1, CRC selection, 0=CRC-16,1=CRC-CCITT-16
4544 * 00 CRC0, CRC initial value, 1 = all 1s
4545 *
4546 * 1000 0001
4547 */
4548 RegValue = 0x81;
4549 if (info->params.flags & HDLC_FLAG_AUTO_CTS)
4550 RegValue |= BIT4;
4551 if (info->params.flags & HDLC_FLAG_AUTO_DCD)
4552 RegValue |= BIT4;
4553 if (info->params.crc_type == HDLC_CRC_16_CCITT)
4554 RegValue |= BIT2 + BIT1;
4555 write_reg(info, MD0, RegValue);
4556
4557 /* MD1, Mode Register 1
4558 *
4559 * 07..06 ADDRS<1..0>, Address detect, 00=no addr check
4560 * 05..04 TXCHR<1..0>, tx char size, 00=8 bits
4561 * 03..02 RXCHR<1..0>, rx char size, 00=8 bits
4562 * 01..00 PMPM<1..0>, Parity mode, 00=no parity
4563 *
4564 * 0000 0000
4565 */
4566 RegValue = 0x00;
4567 write_reg(info, MD1, RegValue);
4568
4569 /* MD2, Mode Register 2
4570 *
4571 * 07 NRZFM, 0=NRZ, 1=FM
4572 * 06..05 CODE<1..0> Encoding, 00=NRZ
4573 * 04..03 DRATE<1..0> DPLL Divisor, 00=8
4574 * 02 Reserved, must be 0
4575 * 01..00 CNCT<1..0> Channel connection, 0=normal
4576 *
4577 * 0000 0000
4578 */
4579 RegValue = 0x00;
4580 switch(info->params.encoding) {
4581 case HDLC_ENCODING_NRZI: RegValue |= BIT5; break;
4582 case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT7 + BIT5; break; /* aka FM1 */
4583 case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT7 + BIT6; break; /* aka FM0 */
4584 case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT7; break; /* aka Manchester */
4585 #if 0
4586 case HDLC_ENCODING_NRZB: /* not supported */
4587 case HDLC_ENCODING_NRZI_MARK: /* not supported */
4588 case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: /* not supported */
4589 #endif
4590 }
4591 if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) {
4592 DpllDivisor = 16;
4593 RegValue |= BIT3;
4594 } else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) {
4595 DpllDivisor = 8;
4596 } else {
4597 DpllDivisor = 32;
4598 RegValue |= BIT4;
4599 }
4600 write_reg(info, MD2, RegValue);
4601
4602
4603 /* RXS, Receive clock source
4604 *
4605 * 07 Reserved, must be 0
4606 * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
4607 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4608 */
4609 RegValue=0;
4610 if (info->params.flags & HDLC_FLAG_RXC_BRG)
4611 RegValue |= BIT6;
4612 if (info->params.flags & HDLC_FLAG_RXC_DPLL)
4613 RegValue |= BIT6 + BIT5;
4614 write_reg(info, RXS, RegValue);
4615
4616 /* TXS, Transmit clock source
4617 *
4618 * 07 Reserved, must be 0
4619 * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
4620 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4621 */
4622 RegValue=0;
4623 if (info->params.flags & HDLC_FLAG_TXC_BRG)
4624 RegValue |= BIT6;
4625 if (info->params.flags & HDLC_FLAG_TXC_DPLL)
4626 RegValue |= BIT6 + BIT5;
4627 write_reg(info, TXS, RegValue);
4628
4629 if (info->params.flags & HDLC_FLAG_RXC_DPLL)
4630 set_rate(info, info->params.clock_speed * DpllDivisor);
4631 else
4632 set_rate(info, info->params.clock_speed);
4633
4634 /* GPDATA (General Purpose I/O Data Register)
4635 *
4636 * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
4637 */
4638 if (info->params.flags & HDLC_FLAG_TXC_BRG)
4639 info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
4640 else
4641 info->port_array[0]->ctrlreg_value &= ~(BIT0 << (info->port_num * 2));
4642 write_control_reg(info);
4643
4644 /* RRC Receive Ready Control 0
4645 *
4646 * 07..05 Reserved, must be 0
4647 * 04..00 RRC<4..0> Rx FIFO trigger active
4648 */
4649 write_reg(info, RRC, rx_active_fifo_level);
4650
4651 /* TRC0 Transmit Ready Control 0
4652 *
4653 * 07..05 Reserved, must be 0
4654 * 04..00 TRC<4..0> Tx FIFO trigger active
4655 */
4656 write_reg(info, TRC0, tx_active_fifo_level);
4657
4658 /* TRC1 Transmit Ready Control 1
4659 *
4660 * 07..05 Reserved, must be 0
4661 * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1f = 32 bytes (full)
4662 */
4663 write_reg(info, TRC1, (unsigned char)(tx_negate_fifo_level - 1));
4664
4665 /* DMR, DMA Mode Register
4666 *
4667 * 07..05 Reserved, must be 0
4668 * 04 TMOD, Transfer Mode: 1=chained-block
4669 * 03 Reserved, must be 0
4670 * 02 NF, Number of Frames: 1=multi-frame
4671 * 01 CNTE, Frame End IRQ Counter enable: 0=disabled
4672 * 00 Reserved, must be 0
4673 *
4674 * 0001 0100
4675 */
4676 write_reg(info, TXDMA + DMR, 0x14);
4677 write_reg(info, RXDMA + DMR, 0x14);
4678
4679 /* Set chain pointer base (upper 8 bits of 24 bit addr) */
4680 write_reg(info, RXDMA + CPB,
4681 (unsigned char)(info->buffer_list_phys >> 16));
4682
4683 /* Set chain pointer base (upper 8 bits of 24 bit addr) */
4684 write_reg(info, TXDMA + CPB,
4685 (unsigned char)(info->buffer_list_phys >> 16));
4686
4687 /* enable status interrupts. other code enables/disables
4688 * the individual sources for these two interrupt classes.
4689 */
4690 info->ie0_value |= TXINTE + RXINTE;
4691 write_reg(info, IE0, info->ie0_value);
4692
4693 /* CTL, MSCI control register
4694 *
4695 * 07..06 Reserved, set to 0
4696 * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
4697 * 04 IDLC, idle control, 0=mark 1=idle register
4698 * 03 BRK, break, 0=off 1 =on (async)
4699 * 02 SYNCLD, sync char load enable (BSC) 1=enabled
4700 * 01 GOP, go active on poll (LOOP mode) 1=enabled
4701 * 00 RTS, RTS output control, 0=active 1=inactive
4702 *
4703 * 0001 0001
4704 */
4705 RegValue = 0x10;
4706 if (!(info->serial_signals & SerialSignal_RTS))
4707 RegValue |= 0x01;
4708 write_reg(info, CTL, RegValue);
4709
4710 /* preamble not supported ! */
4711
4712 tx_set_idle(info);
4713 tx_stop(info);
4714 rx_stop(info);
4715
4716 set_rate(info, info->params.clock_speed);
4717
4718 if (info->params.loopback)
4719 enable_loopback(info,1);
4720 }
4721
4722 /* Set the transmit HDLC idle mode
4723 */
4724 static void tx_set_idle(SLMP_INFO *info)
4725 {
4726 unsigned char RegValue = 0xff;
4727
4728 /* Map API idle mode to SCA register bits */
4729 switch(info->idle_mode) {
4730 case HDLC_TXIDLE_FLAGS: RegValue = 0x7e; break;
4731 case HDLC_TXIDLE_ALT_ZEROS_ONES: RegValue = 0xaa; break;
4732 case HDLC_TXIDLE_ZEROS: RegValue = 0x00; break;
4733 case HDLC_TXIDLE_ONES: RegValue = 0xff; break;
4734 case HDLC_TXIDLE_ALT_MARK_SPACE: RegValue = 0xaa; break;
4735 case HDLC_TXIDLE_SPACE: RegValue = 0x00; break;
4736 case HDLC_TXIDLE_MARK: RegValue = 0xff; break;
4737 }
4738
4739 write_reg(info, IDL, RegValue);
4740 }
4741
4742 /* Query the adapter for the state of the V24 status (input) signals.
4743 */
4744 static void get_signals(SLMP_INFO *info)
4745 {
4746 u16 status = read_reg(info, SR3);
4747 u16 gpstatus = read_status_reg(info);
4748 u16 testbit;
4749
4750 /* clear all serial signals except DTR and RTS */
4751 info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS;
4752
4753 /* set serial signal bits to reflect MISR */
4754
4755 if (!(status & BIT3))
4756 info->serial_signals |= SerialSignal_CTS;
4757
4758 if ( !(status & BIT2))
4759 info->serial_signals |= SerialSignal_DCD;
4760
4761 testbit = BIT1 << (info->port_num * 2); // Port 0..3 RI is GPDATA<1,3,5,7>
4762 if (!(gpstatus & testbit))
4763 info->serial_signals |= SerialSignal_RI;
4764
4765 testbit = BIT0 << (info->port_num * 2); // Port 0..3 DSR is GPDATA<0,2,4,6>
4766 if (!(gpstatus & testbit))
4767 info->serial_signals |= SerialSignal_DSR;
4768 }
4769
4770 /* Set the state of DTR and RTS based on contents of
4771 * serial_signals member of device context.
4772 */
4773 static void set_signals(SLMP_INFO *info)
4774 {
4775 unsigned char RegValue;
4776 u16 EnableBit;
4777
4778 RegValue = read_reg(info, CTL);
4779 if (info->serial_signals & SerialSignal_RTS)
4780 RegValue &= ~BIT0;
4781 else
4782 RegValue |= BIT0;
4783 write_reg(info, CTL, RegValue);
4784
4785 // Port 0..3 DTR is ctrl reg <1,3,5,7>
4786 EnableBit = BIT1 << (info->port_num*2);
4787 if (info->serial_signals & SerialSignal_DTR)
4788 info->port_array[0]->ctrlreg_value &= ~EnableBit;
4789 else
4790 info->port_array[0]->ctrlreg_value |= EnableBit;
4791 write_control_reg(info);
4792 }
4793
4794 /*******************/
4795 /* DMA Buffer Code */
4796 /*******************/
4797
4798 /* Set the count for all receive buffers to SCABUFSIZE
4799 * and set the current buffer to the first buffer. This effectively
4800 * makes all buffers free and discards any data in buffers.
4801 */
4802 static void rx_reset_buffers(SLMP_INFO *info)
4803 {
4804 rx_free_frame_buffers(info, 0, info->rx_buf_count - 1);
4805 }
4806
4807 /* Free the buffers used by a received frame
4808 *
4809 * info pointer to device instance data
4810 * first index of 1st receive buffer of frame
4811 * last index of last receive buffer of frame
4812 */
4813 static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last)
4814 {
4815 bool done = false;
4816
4817 while(!done) {
4818 /* reset current buffer for reuse */
4819 info->rx_buf_list[first].status = 0xff;
4820
4821 if (first == last) {
4822 done = true;
4823 /* set new last rx descriptor address */
4824 write_reg16(info, RXDMA + EDA, info->rx_buf_list_ex[first].phys_entry);
4825 }
4826
4827 first++;
4828 if (first == info->rx_buf_count)
4829 first = 0;
4830 }
4831
4832 /* set current buffer to next buffer after last buffer of frame */
4833 info->current_rx_buf = first;
4834 }
4835
4836 /* Return a received frame from the receive DMA buffers.
4837 * Only frames received without errors are returned.
4838 *
4839 * Return Value: true if frame returned, otherwise false
4840 */
4841 static bool rx_get_frame(SLMP_INFO *info)
4842 {
4843 unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */
4844 unsigned short status;
4845 unsigned int framesize = 0;
4846 bool ReturnCode = false;
4847 unsigned long flags;
4848 struct tty_struct *tty = info->port.tty;
4849 unsigned char addr_field = 0xff;
4850 SCADESC *desc;
4851 SCADESC_EX *desc_ex;
4852
4853 CheckAgain:
4854 /* assume no frame returned, set zero length */
4855 framesize = 0;
4856 addr_field = 0xff;
4857
4858 /*
4859 * current_rx_buf points to the 1st buffer of the next available
4860 * receive frame. To find the last buffer of the frame look for
4861 * a non-zero status field in the buffer entries. (The status
4862 * field is set by the 16C32 after completing a receive frame.
4863 */
4864 StartIndex = EndIndex = info->current_rx_buf;
4865
4866 for ( ;; ) {
4867 desc = &info->rx_buf_list[EndIndex];
4868 desc_ex = &info->rx_buf_list_ex[EndIndex];
4869
4870 if (desc->status == 0xff)
4871 goto Cleanup; /* current desc still in use, no frames available */
4872
4873 if (framesize == 0 && info->params.addr_filter != 0xff)
4874 addr_field = desc_ex->virt_addr[0];
4875
4876 framesize += desc->length;
4877
4878 /* Status != 0 means last buffer of frame */
4879 if (desc->status)
4880 break;
4881
4882 EndIndex++;
4883 if (EndIndex == info->rx_buf_count)
4884 EndIndex = 0;
4885
4886 if (EndIndex == info->current_rx_buf) {
4887 /* all buffers have been 'used' but none mark */
4888 /* the end of a frame. Reset buffers and receiver. */
4889 if ( info->rx_enabled ){
4890 spin_lock_irqsave(&info->lock,flags);
4891 rx_start(info);
4892 spin_unlock_irqrestore(&info->lock,flags);
4893 }
4894 goto Cleanup;
4895 }
4896
4897 }
4898
4899 /* check status of receive frame */
4900
4901 /* frame status is byte stored after frame data
4902 *
4903 * 7 EOM (end of msg), 1 = last buffer of frame
4904 * 6 Short Frame, 1 = short frame
4905 * 5 Abort, 1 = frame aborted
4906 * 4 Residue, 1 = last byte is partial
4907 * 3 Overrun, 1 = overrun occurred during frame reception
4908 * 2 CRC, 1 = CRC error detected
4909 *
4910 */
4911 status = desc->status;
4912
4913 /* ignore CRC bit if not using CRC (bit is undefined) */
4914 /* Note:CRC is not save to data buffer */
4915 if (info->params.crc_type == HDLC_CRC_NONE)
4916 status &= ~BIT2;
4917
4918 if (framesize == 0 ||
4919 (addr_field != 0xff && addr_field != info->params.addr_filter)) {
4920 /* discard 0 byte frames, this seems to occur sometime
4921 * when remote is idling flags.
4922 */
4923 rx_free_frame_buffers(info, StartIndex, EndIndex);
4924 goto CheckAgain;
4925 }
4926
4927 if (framesize < 2)
4928 status |= BIT6;
4929
4930 if (status & (BIT6+BIT5+BIT3+BIT2)) {
4931 /* received frame has errors,
4932 * update counts and mark frame size as 0
4933 */
4934 if (status & BIT6)
4935 info->icount.rxshort++;
4936 else if (status & BIT5)
4937 info->icount.rxabort++;
4938 else if (status & BIT3)
4939 info->icount.rxover++;
4940 else
4941 info->icount.rxcrc++;
4942
4943 framesize = 0;
4944 #if SYNCLINK_GENERIC_HDLC
4945 {
4946 info->netdev->stats.rx_errors++;
4947 info->netdev->stats.rx_frame_errors++;
4948 }
4949 #endif
4950 }
4951
4952 if ( debug_level >= DEBUG_LEVEL_BH )
4953 printk("%s(%d):%s rx_get_frame() status=%04X size=%d\n",
4954 __FILE__,__LINE__,info->device_name,status,framesize);
4955
4956 if ( debug_level >= DEBUG_LEVEL_DATA )
4957 trace_block(info,info->rx_buf_list_ex[StartIndex].virt_addr,
4958 min_t(int, framesize,SCABUFSIZE),0);
4959
4960 if (framesize) {
4961 if (framesize > info->max_frame_size)
4962 info->icount.rxlong++;
4963 else {
4964 /* copy dma buffer(s) to contiguous intermediate buffer */
4965 int copy_count = framesize;
4966 int index = StartIndex;
4967 unsigned char *ptmp = info->tmp_rx_buf;
4968 info->tmp_rx_buf_count = framesize;
4969
4970 info->icount.rxok++;
4971
4972 while(copy_count) {
4973 int partial_count = min(copy_count,SCABUFSIZE);
4974 memcpy( ptmp,
4975 info->rx_buf_list_ex[index].virt_addr,
4976 partial_count );
4977 ptmp += partial_count;
4978 copy_count -= partial_count;
4979
4980 if ( ++index == info->rx_buf_count )
4981 index = 0;
4982 }
4983
4984 #if SYNCLINK_GENERIC_HDLC
4985 if (info->netcount)
4986 hdlcdev_rx(info,info->tmp_rx_buf,framesize);
4987 else
4988 #endif
4989 ldisc_receive_buf(tty,info->tmp_rx_buf,
4990 info->flag_buf, framesize);
4991 }
4992 }
4993 /* Free the buffers used by this frame. */
4994 rx_free_frame_buffers( info, StartIndex, EndIndex );
4995
4996 ReturnCode = true;
4997
4998 Cleanup:
4999 if ( info->rx_enabled && info->rx_overflow ) {
5000 /* Receiver is enabled, but needs to restarted due to
5001 * rx buffer overflow. If buffers are empty, restart receiver.
5002 */
5003 if (info->rx_buf_list[EndIndex].status == 0xff) {
5004 spin_lock_irqsave(&info->lock,flags);
5005 rx_start(info);
5006 spin_unlock_irqrestore(&info->lock,flags);
5007 }
5008 }
5009
5010 return ReturnCode;
5011 }
5012
5013 /* load the transmit DMA buffer with data
5014 */
5015 static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count)
5016 {
5017 unsigned short copy_count;
5018 unsigned int i = 0;
5019 SCADESC *desc;
5020 SCADESC_EX *desc_ex;
5021
5022 if ( debug_level >= DEBUG_LEVEL_DATA )
5023 trace_block(info,buf, min_t(int, count,SCABUFSIZE), 1);
5024
5025 /* Copy source buffer to one or more DMA buffers, starting with
5026 * the first transmit dma buffer.
5027 */
5028 for(i=0;;)
5029 {
5030 copy_count = min_t(unsigned short,count,SCABUFSIZE);
5031
5032 desc = &info->tx_buf_list[i];
5033 desc_ex = &info->tx_buf_list_ex[i];
5034
5035 load_pci_memory(info, desc_ex->virt_addr,buf,copy_count);
5036
5037 desc->length = copy_count;
5038 desc->status = 0;
5039
5040 buf += copy_count;
5041 count -= copy_count;
5042
5043 if (!count)
5044 break;
5045
5046 i++;
5047 if (i >= info->tx_buf_count)
5048 i = 0;
5049 }
5050
5051 info->tx_buf_list[i].status = 0x81; /* set EOM and EOT status */
5052 info->last_tx_buf = ++i;
5053 }
5054
5055 static bool register_test(SLMP_INFO *info)
5056 {
5057 static unsigned char testval[] = {0x00, 0xff, 0xaa, 0x55, 0x69, 0x96};
5058 static unsigned int count = ARRAY_SIZE(testval);
5059 unsigned int i;
5060 bool rc = true;
5061 unsigned long flags;
5062
5063 spin_lock_irqsave(&info->lock,flags);
5064 reset_port(info);
5065
5066 /* assume failure */
5067 info->init_error = DiagStatus_AddressFailure;
5068
5069 /* Write bit patterns to various registers but do it out of */
5070 /* sync, then read back and verify values. */
5071
5072 for (i = 0 ; i < count ; i++) {
5073 write_reg(info, TMC, testval[i]);
5074 write_reg(info, IDL, testval[(i+1)%count]);
5075 write_reg(info, SA0, testval[(i+2)%count]);
5076 write_reg(info, SA1, testval[(i+3)%count]);
5077
5078 if ( (read_reg(info, TMC) != testval[i]) ||
5079 (read_reg(info, IDL) != testval[(i+1)%count]) ||
5080 (read_reg(info, SA0) != testval[(i+2)%count]) ||
5081 (read_reg(info, SA1) != testval[(i+3)%count]) )
5082 {
5083 rc = false;
5084 break;
5085 }
5086 }
5087
5088 reset_port(info);
5089 spin_unlock_irqrestore(&info->lock,flags);
5090
5091 return rc;
5092 }
5093
5094 static bool irq_test(SLMP_INFO *info)
5095 {
5096 unsigned long timeout;
5097 unsigned long flags;
5098
5099 unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0;
5100
5101 spin_lock_irqsave(&info->lock,flags);
5102 reset_port(info);
5103
5104 /* assume failure */
5105 info->init_error = DiagStatus_IrqFailure;
5106 info->irq_occurred = false;
5107
5108 /* setup timer0 on SCA0 to interrupt */
5109
5110 /* IER2<7..4> = timer<3..0> interrupt enables (1=enabled) */
5111 write_reg(info, IER2, (unsigned char)((info->port_num & 1) ? BIT6 : BIT4));
5112
5113 write_reg(info, (unsigned char)(timer + TEPR), 0); /* timer expand prescale */
5114 write_reg16(info, (unsigned char)(timer + TCONR), 1); /* timer constant */
5115
5116
5117 /* TMCS, Timer Control/Status Register
5118 *
5119 * 07 CMF, Compare match flag (read only) 1=match
5120 * 06 ECMI, CMF Interrupt Enable: 1=enabled
5121 * 05 Reserved, must be 0
5122 * 04 TME, Timer Enable
5123 * 03..00 Reserved, must be 0
5124 *
5125 * 0101 0000
5126 */
5127 write_reg(info, (unsigned char)(timer + TMCS), 0x50);
5128
5129 spin_unlock_irqrestore(&info->lock,flags);
5130
5131 timeout=100;
5132 while( timeout-- && !info->irq_occurred ) {
5133 msleep_interruptible(10);
5134 }
5135
5136 spin_lock_irqsave(&info->lock,flags);
5137 reset_port(info);
5138 spin_unlock_irqrestore(&info->lock,flags);
5139
5140 return info->irq_occurred;
5141 }
5142
5143 /* initialize individual SCA device (2 ports)
5144 */
5145 static bool sca_init(SLMP_INFO *info)
5146 {
5147 /* set wait controller to single mem partition (low), no wait states */
5148 write_reg(info, PABR0, 0); /* wait controller addr boundary 0 */
5149 write_reg(info, PABR1, 0); /* wait controller addr boundary 1 */
5150 write_reg(info, WCRL, 0); /* wait controller low range */
5151 write_reg(info, WCRM, 0); /* wait controller mid range */
5152 write_reg(info, WCRH, 0); /* wait controller high range */
5153
5154 /* DPCR, DMA Priority Control
5155 *
5156 * 07..05 Not used, must be 0
5157 * 04 BRC, bus release condition: 0=all transfers complete
5158 * 03 CCC, channel change condition: 0=every cycle
5159 * 02..00 PR<2..0>, priority 100=round robin
5160 *
5161 * 00000100 = 0x04
5162 */
5163 write_reg(info, DPCR, dma_priority);
5164
5165 /* DMA Master Enable, BIT7: 1=enable all channels */
5166 write_reg(info, DMER, 0x80);
5167
5168 /* enable all interrupt classes */
5169 write_reg(info, IER0, 0xff); /* TxRDY,RxRDY,TxINT,RxINT (ports 0-1) */
5170 write_reg(info, IER1, 0xff); /* DMIB,DMIA (channels 0-3) */
5171 write_reg(info, IER2, 0xf0); /* TIRQ (timers 0-3) */
5172
5173 /* ITCR, interrupt control register
5174 * 07 IPC, interrupt priority, 0=MSCI->DMA
5175 * 06..05 IAK<1..0>, Acknowledge cycle, 00=non-ack cycle
5176 * 04 VOS, Vector Output, 0=unmodified vector
5177 * 03..00 Reserved, must be 0
5178 */
5179 write_reg(info, ITCR, 0);
5180
5181 return true;
5182 }
5183
5184 /* initialize adapter hardware
5185 */
5186 static bool init_adapter(SLMP_INFO *info)
5187 {
5188 int i;
5189
5190 /* Set BIT30 of Local Control Reg 0x50 to reset SCA */
5191 volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50);
5192 u32 readval;
5193
5194 info->misc_ctrl_value |= BIT30;
5195 *MiscCtrl = info->misc_ctrl_value;
5196
5197 /*
5198 * Force at least 170ns delay before clearing
5199 * reset bit. Each read from LCR takes at least
5200 * 30ns so 10 times for 300ns to be safe.
5201 */
5202 for(i=0;i<10;i++)
5203 readval = *MiscCtrl;
5204
5205 info->misc_ctrl_value &= ~BIT30;
5206 *MiscCtrl = info->misc_ctrl_value;
5207
5208 /* init control reg (all DTRs off, all clksel=input) */
5209 info->ctrlreg_value = 0xaa;
5210 write_control_reg(info);
5211
5212 {
5213 volatile u32 *LCR1BRDR = (u32 *)(info->lcr_base + 0x2c);
5214 lcr1_brdr_value &= ~(BIT5 + BIT4 + BIT3);
5215
5216 switch(read_ahead_count)
5217 {
5218 case 16:
5219 lcr1_brdr_value |= BIT5 + BIT4 + BIT3;
5220 break;
5221 case 8:
5222 lcr1_brdr_value |= BIT5 + BIT4;
5223 break;
5224 case 4:
5225 lcr1_brdr_value |= BIT5 + BIT3;
5226 break;
5227 case 0:
5228 lcr1_brdr_value |= BIT5;
5229 break;
5230 }
5231
5232 *LCR1BRDR = lcr1_brdr_value;
5233 *MiscCtrl = misc_ctrl_value;
5234 }
5235
5236 sca_init(info->port_array[0]);
5237 sca_init(info->port_array[2]);
5238
5239 return true;
5240 }
5241
5242 /* Loopback an HDLC frame to test the hardware
5243 * interrupt and DMA functions.
5244 */
5245 static bool loopback_test(SLMP_INFO *info)
5246 {
5247 #define TESTFRAMESIZE 20
5248
5249 unsigned long timeout;
5250 u16 count = TESTFRAMESIZE;
5251 unsigned char buf[TESTFRAMESIZE];
5252 bool rc = false;
5253 unsigned long flags;
5254
5255 struct tty_struct *oldtty = info->port.tty;
5256 u32 speed = info->params.clock_speed;
5257
5258 info->params.clock_speed = 3686400;
5259 info->port.tty = NULL;
5260
5261 /* assume failure */
5262 info->init_error = DiagStatus_DmaFailure;
5263
5264 /* build and send transmit frame */
5265 for (count = 0; count < TESTFRAMESIZE;++count)
5266 buf[count] = (unsigned char)count;
5267
5268 memset(info->tmp_rx_buf,0,TESTFRAMESIZE);
5269
5270 /* program hardware for HDLC and enabled receiver */
5271 spin_lock_irqsave(&info->lock,flags);
5272 hdlc_mode(info);
5273 enable_loopback(info,1);
5274 rx_start(info);
5275 info->tx_count = count;
5276 tx_load_dma_buffer(info,buf,count);
5277 tx_start(info);
5278 spin_unlock_irqrestore(&info->lock,flags);
5279
5280 /* wait for receive complete */
5281 /* Set a timeout for waiting for interrupt. */
5282 for ( timeout = 100; timeout; --timeout ) {
5283 msleep_interruptible(10);
5284
5285 if (rx_get_frame(info)) {
5286 rc = true;
5287 break;
5288 }
5289 }
5290
5291 /* verify received frame length and contents */
5292 if (rc &&
5293 ( info->tmp_rx_buf_count != count ||
5294 memcmp(buf, info->tmp_rx_buf,count))) {
5295 rc = false;
5296 }
5297
5298 spin_lock_irqsave(&info->lock,flags);
5299 reset_adapter(info);
5300 spin_unlock_irqrestore(&info->lock,flags);
5301
5302 info->params.clock_speed = speed;
5303 info->port.tty = oldtty;
5304
5305 return rc;
5306 }
5307
5308 /* Perform diagnostics on hardware
5309 */
5310 static int adapter_test( SLMP_INFO *info )
5311 {
5312 unsigned long flags;
5313 if ( debug_level >= DEBUG_LEVEL_INFO )
5314 printk( "%s(%d):Testing device %s\n",
5315 __FILE__,__LINE__,info->device_name );
5316
5317 spin_lock_irqsave(&info->lock,flags);
5318 init_adapter(info);
5319 spin_unlock_irqrestore(&info->lock,flags);
5320
5321 info->port_array[0]->port_count = 0;
5322
5323 if ( register_test(info->port_array[0]) &&
5324 register_test(info->port_array[1])) {
5325
5326 info->port_array[0]->port_count = 2;
5327
5328 if ( register_test(info->port_array[2]) &&
5329 register_test(info->port_array[3]) )
5330 info->port_array[0]->port_count += 2;
5331 }
5332 else {
5333 printk( "%s(%d):Register test failure for device %s Addr=%08lX\n",
5334 __FILE__,__LINE__,info->device_name, (unsigned long)(info->phys_sca_base));
5335 return -ENODEV;
5336 }
5337
5338 if ( !irq_test(info->port_array[0]) ||
5339 !irq_test(info->port_array[1]) ||
5340 (info->port_count == 4 && !irq_test(info->port_array[2])) ||
5341 (info->port_count == 4 && !irq_test(info->port_array[3]))) {
5342 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
5343 __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
5344 return -ENODEV;
5345 }
5346
5347 if (!loopback_test(info->port_array[0]) ||
5348 !loopback_test(info->port_array[1]) ||
5349 (info->port_count == 4 && !loopback_test(info->port_array[2])) ||
5350 (info->port_count == 4 && !loopback_test(info->port_array[3]))) {
5351 printk( "%s(%d):DMA test failure for device %s\n",
5352 __FILE__,__LINE__,info->device_name);
5353 return -ENODEV;
5354 }
5355
5356 if ( debug_level >= DEBUG_LEVEL_INFO )
5357 printk( "%s(%d):device %s passed diagnostics\n",
5358 __FILE__,__LINE__,info->device_name );
5359
5360 info->port_array[0]->init_error = 0;
5361 info->port_array[1]->init_error = 0;
5362 if ( info->port_count > 2 ) {
5363 info->port_array[2]->init_error = 0;
5364 info->port_array[3]->init_error = 0;
5365 }
5366
5367 return 0;
5368 }
5369
5370 /* Test the shared memory on a PCI adapter.
5371 */
5372 static bool memory_test(SLMP_INFO *info)
5373 {
5374 static unsigned long testval[] = { 0x0, 0x55555555, 0xaaaaaaaa,
5375 0x66666666, 0x99999999, 0xffffffff, 0x12345678 };
5376 unsigned long count = ARRAY_SIZE(testval);
5377 unsigned long i;
5378 unsigned long limit = SCA_MEM_SIZE/sizeof(unsigned long);
5379 unsigned long * addr = (unsigned long *)info->memory_base;
5380
5381 /* Test data lines with test pattern at one location. */
5382
5383 for ( i = 0 ; i < count ; i++ ) {
5384 *addr = testval[i];
5385 if ( *addr != testval[i] )
5386 return false;
5387 }
5388
5389 /* Test address lines with incrementing pattern over */
5390 /* entire address range. */
5391
5392 for ( i = 0 ; i < limit ; i++ ) {
5393 *addr = i * 4;
5394 addr++;
5395 }
5396
5397 addr = (unsigned long *)info->memory_base;
5398
5399 for ( i = 0 ; i < limit ; i++ ) {
5400 if ( *addr != i * 4 )
5401 return false;
5402 addr++;
5403 }
5404
5405 memset( info->memory_base, 0, SCA_MEM_SIZE );
5406 return true;
5407 }
5408
5409 /* Load data into PCI adapter shared memory.
5410 *
5411 * The PCI9050 releases control of the local bus
5412 * after completing the current read or write operation.
5413 *
5414 * While the PCI9050 write FIFO not empty, the
5415 * PCI9050 treats all of the writes as a single transaction
5416 * and does not release the bus. This causes DMA latency problems
5417 * at high speeds when copying large data blocks to the shared memory.
5418 *
5419 * This function breaks a write into multiple transations by
5420 * interleaving a read which flushes the write FIFO and 'completes'
5421 * the write transation. This allows any pending DMA request to gain control
5422 * of the local bus in a timely fasion.
5423 */
5424 static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count)
5425 {
5426 /* A load interval of 16 allows for 4 32-bit writes at */
5427 /* 136ns each for a maximum latency of 542ns on the local bus.*/
5428
5429 unsigned short interval = count / sca_pci_load_interval;
5430 unsigned short i;
5431
5432 for ( i = 0 ; i < interval ; i++ )
5433 {
5434 memcpy(dest, src, sca_pci_load_interval);
5435 read_status_reg(info);
5436 dest += sca_pci_load_interval;
5437 src += sca_pci_load_interval;
5438 }
5439
5440 memcpy(dest, src, count % sca_pci_load_interval);
5441 }
5442
5443 static void trace_block(SLMP_INFO *info,const char* data, int count, int xmit)
5444 {
5445 int i;
5446 int linecount;
5447 if (xmit)
5448 printk("%s tx data:\n",info->device_name);
5449 else
5450 printk("%s rx data:\n",info->device_name);
5451
5452 while(count) {
5453 if (count > 16)
5454 linecount = 16;
5455 else
5456 linecount = count;
5457
5458 for(i=0;i<linecount;i++)
5459 printk("%02X ",(unsigned char)data[i]);
5460 for(;i<17;i++)
5461 printk(" ");
5462 for(i=0;i<linecount;i++) {
5463 if (data[i]>=040 && data[i]<=0176)
5464 printk("%c",data[i]);
5465 else
5466 printk(".");
5467 }
5468 printk("\n");
5469
5470 data += linecount;
5471 count -= linecount;
5472 }
5473 } /* end of trace_block() */
5474
5475 /* called when HDLC frame times out
5476 * update stats and do tx completion processing
5477 */
5478 static void tx_timeout(unsigned long context)
5479 {
5480 SLMP_INFO *info = (SLMP_INFO*)context;
5481 unsigned long flags;
5482
5483 if ( debug_level >= DEBUG_LEVEL_INFO )
5484 printk( "%s(%d):%s tx_timeout()\n",
5485 __FILE__,__LINE__,info->device_name);
5486 if(info->tx_active && info->params.mode == MGSL_MODE_HDLC) {
5487 info->icount.txtimeout++;
5488 }
5489 spin_lock_irqsave(&info->lock,flags);
5490 info->tx_active = false;
5491 info->tx_count = info->tx_put = info->tx_get = 0;
5492
5493 spin_unlock_irqrestore(&info->lock,flags);
5494
5495 #if SYNCLINK_GENERIC_HDLC
5496 if (info->netcount)
5497 hdlcdev_tx_done(info);
5498 else
5499 #endif
5500 bh_transmit(info);
5501 }
5502
5503 /* called to periodically check the DSR/RI modem signal input status
5504 */
5505 static void status_timeout(unsigned long context)
5506 {
5507 u16 status = 0;
5508 SLMP_INFO *info = (SLMP_INFO*)context;
5509 unsigned long flags;
5510 unsigned char delta;
5511
5512
5513 spin_lock_irqsave(&info->lock,flags);
5514 get_signals(info);
5515 spin_unlock_irqrestore(&info->lock,flags);
5516
5517 /* check for DSR/RI state change */
5518
5519 delta = info->old_signals ^ info->serial_signals;
5520 info->old_signals = info->serial_signals;
5521
5522 if (delta & SerialSignal_DSR)
5523 status |= MISCSTATUS_DSR_LATCHED|(info->serial_signals&SerialSignal_DSR);
5524
5525 if (delta & SerialSignal_RI)
5526 status |= MISCSTATUS_RI_LATCHED|(info->serial_signals&SerialSignal_RI);
5527
5528 if (delta & SerialSignal_DCD)
5529 status |= MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD);
5530
5531 if (delta & SerialSignal_CTS)
5532 status |= MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS);
5533
5534 if (status)
5535 isr_io_pin(info,status);
5536
5537 mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10));
5538 }
5539
5540
5541 /* Register Access Routines -
5542 * All registers are memory mapped
5543 */
5544 #define CALC_REGADDR() \
5545 unsigned char * RegAddr = (unsigned char*)(info->sca_base + Addr); \
5546 if (info->port_num > 1) \
5547 RegAddr += 256; /* port 0-1 SCA0, 2-3 SCA1 */ \
5548 if ( info->port_num & 1) { \
5549 if (Addr > 0x7f) \
5550 RegAddr += 0x40; /* DMA access */ \
5551 else if (Addr > 0x1f && Addr < 0x60) \
5552 RegAddr += 0x20; /* MSCI access */ \
5553 }
5554
5555
5556 static unsigned char read_reg(SLMP_INFO * info, unsigned char Addr)
5557 {
5558 CALC_REGADDR();
5559 return *RegAddr;
5560 }
5561 static void write_reg(SLMP_INFO * info, unsigned char Addr, unsigned char Value)
5562 {
5563 CALC_REGADDR();
5564 *RegAddr = Value;
5565 }
5566
5567 static u16 read_reg16(SLMP_INFO * info, unsigned char Addr)
5568 {
5569 CALC_REGADDR();
5570 return *((u16 *)RegAddr);
5571 }
5572
5573 static void write_reg16(SLMP_INFO * info, unsigned char Addr, u16 Value)
5574 {
5575 CALC_REGADDR();
5576 *((u16 *)RegAddr) = Value;
5577 }
5578
5579 static unsigned char read_status_reg(SLMP_INFO * info)
5580 {
5581 unsigned char *RegAddr = (unsigned char *)info->statctrl_base;
5582 return *RegAddr;
5583 }
5584
5585 static void write_control_reg(SLMP_INFO * info)
5586 {
5587 unsigned char *RegAddr = (unsigned char *)info->statctrl_base;
5588 *RegAddr = info->port_array[0]->ctrlreg_value;
5589 }
5590
5591
5592 static int __devinit synclinkmp_init_one (struct pci_dev *dev,
5593 const struct pci_device_id *ent)
5594 {
5595 if (pci_enable_device(dev)) {
5596 printk("error enabling pci device %p\n", dev);
5597 return -EIO;
5598 }
5599 device_init( ++synclinkmp_adapter_count, dev );
5600 return 0;
5601 }
5602
5603 static void __devexit synclinkmp_remove_one (struct pci_dev *dev)
5604 {
5605 }
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