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x86/amd-iommu: Add per IOMMU reference counting
[linux/fpc-iii.git] / drivers / char / cyclades.c
blob4254457d391186429590769d05334d01c459bd75
1 #undef BLOCKMOVE
2 #define Z_WAKE
3 #undef Z_EXT_CHARS_IN_BUFFER
4
5 /*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
13 *
14 * Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com>
15 *
16 * Much of the design and some of the code came from serial.c
17 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
18 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
19 * and then fixed as suggested by Michael K. Johnson 12/12/92.
20 * Converted to pci probing and cleaned up by Jiri Slaby.
21 *
22 */
23
24 #define CY_VERSION "2.6"
25
26 /* If you need to install more boards than NR_CARDS, change the constant
27 in the definition below. No other change is necessary to support up to
28 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
29
30 #define NR_CARDS 4
31
32 /*
33 If the total number of ports is larger than NR_PORTS, change this
34 constant in the definition below. No other change is necessary to
35 support more boards/ports. */
36
37 #define NR_PORTS 256
38
39 #define ZO_V1 0
40 #define ZO_V2 1
41 #define ZE_V1 2
42
43 #define SERIAL_PARANOIA_CHECK
44 #undef CY_DEBUG_OPEN
45 #undef CY_DEBUG_THROTTLE
46 #undef CY_DEBUG_OTHER
47 #undef CY_DEBUG_IO
48 #undef CY_DEBUG_COUNT
49 #undef CY_DEBUG_DTR
50 #undef CY_DEBUG_WAIT_UNTIL_SENT
51 #undef CY_DEBUG_INTERRUPTS
52 #undef CY_16Y_HACK
53 #undef CY_ENABLE_MONITORING
54 #undef CY_PCI_DEBUG
55
56 /*
57 * Include section
58 */
59 #include <linux/module.h>
60 #include <linux/errno.h>
61 #include <linux/signal.h>
62 #include <linux/sched.h>
63 #include <linux/timer.h>
64 #include <linux/interrupt.h>
65 #include <linux/tty.h>
66 #include <linux/tty_flip.h>
67 #include <linux/serial.h>
68 #include <linux/smp_lock.h>
69 #include <linux/major.h>
70 #include <linux/string.h>
71 #include <linux/fcntl.h>
72 #include <linux/ptrace.h>
73 #include <linux/cyclades.h>
74 #include <linux/mm.h>
75 #include <linux/ioport.h>
76 #include <linux/init.h>
77 #include <linux/delay.h>
78 #include <linux/spinlock.h>
79 #include <linux/bitops.h>
80 #include <linux/firmware.h>
81 #include <linux/device.h>
82
83 #include <linux/io.h>
84 #include <linux/uaccess.h>
85
86 #include <linux/kernel.h>
87 #include <linux/pci.h>
88
89 #include <linux/stat.h>
90 #include <linux/proc_fs.h>
91 #include <linux/seq_file.h>
92
93 static void cy_send_xchar(struct tty_struct *tty, char ch);
94
95 #ifndef SERIAL_XMIT_SIZE
96 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
97 #endif
98
99 #define STD_COM_FLAGS (0)
100
101 /* firmware stuff */
102 #define ZL_MAX_BLOCKS 16
103 #define DRIVER_VERSION 0x02010203
104 #define RAM_SIZE 0x80000
105
106 enum zblock_type {
107 ZBLOCK_PRG = 0,
108 ZBLOCK_FPGA = 1
109 };
110
111 struct zfile_header {
112 char name[64];
113 char date[32];
114 char aux[32];
115 u32 n_config;
116 u32 config_offset;
117 u32 n_blocks;
118 u32 block_offset;
119 u32 reserved[9];
120 } __attribute__ ((packed));
121
122 struct zfile_config {
123 char name[64];
124 u32 mailbox;
125 u32 function;
126 u32 n_blocks;
127 u32 block_list[ZL_MAX_BLOCKS];
128 } __attribute__ ((packed));
129
130 struct zfile_block {
131 u32 type;
132 u32 file_offset;
133 u32 ram_offset;
134 u32 size;
135 } __attribute__ ((packed));
136
137 static struct tty_driver *cy_serial_driver;
138
139 #ifdef CONFIG_ISA
140 /* This is the address lookup table. The driver will probe for
141 Cyclom-Y/ISA boards at all addresses in here. If you want the
142 driver to probe addresses at a different address, add it to
143 this table. If the driver is probing some other board and
144 causing problems, remove the offending address from this table.
145 */
146
147 static unsigned int cy_isa_addresses[] = {
148 0xD0000,
149 0xD2000,
150 0xD4000,
151 0xD6000,
152 0xD8000,
153 0xDA000,
154 0xDC000,
155 0xDE000,
156 0, 0, 0, 0, 0, 0, 0, 0
157 };
158
159 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
160
161 #ifdef MODULE
162 static long maddr[NR_CARDS];
163 static int irq[NR_CARDS];
164
165 module_param_array(maddr, long, NULL, 0);
166 module_param_array(irq, int, NULL, 0);
167 #endif
168
169 #endif /* CONFIG_ISA */
170
171 /* This is the per-card data structure containing address, irq, number of
172 channels, etc. This driver supports a maximum of NR_CARDS cards.
173 */
174 static struct cyclades_card cy_card[NR_CARDS];
175
176 static int cy_next_channel; /* next minor available */
177
178 /*
179 * This is used to look up the divisor speeds and the timeouts
180 * We're normally limited to 15 distinct baud rates. The extra
181 * are accessed via settings in info->port.flags.
182 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
183 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
184 * HI VHI
185 * 20
186 */
187 static const int baud_table[] = {
188 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
189 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
190 230400, 0
191 };
192
193 static const char baud_co_25[] = { /* 25 MHz clock option table */
194 /* value => 00 01 02 03 04 */
195 /* divide by 8 32 128 512 2048 */
196 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
197 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
198 };
199
200 static const char baud_bpr_25[] = { /* 25 MHz baud rate period table */
201 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
202 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
203 };
204
205 static const char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
206 /* value => 00 01 02 03 04 */
207 /* divide by 8 32 128 512 2048 */
208 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
209 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
210 0x00
211 };
212
213 static const char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
214 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
215 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
216 0x21
217 };
218
219 static const char baud_cor3[] = { /* receive threshold */
220 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
221 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
222 0x07
223 };
224
225 /*
226 * The Cyclades driver implements HW flow control as any serial driver.
227 * The cyclades_port structure member rflow and the vector rflow_thr
228 * allows us to take advantage of a special feature in the CD1400 to avoid
229 * data loss even when the system interrupt latency is too high. These flags
230 * are to be used only with very special applications. Setting these flags
231 * requires the use of a special cable (DTR and RTS reversed). In the new
232 * CD1400-based boards (rev. 6.00 or later), there is no need for special
233 * cables.
234 */
235
236 static const char rflow_thr[] = { /* rflow threshold */
237 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
238 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
239 0x0a
240 };
241
242 /* The Cyclom-Ye has placed the sequential chips in non-sequential
243 * address order. This look-up table overcomes that problem.
244 */
245 static const unsigned int cy_chip_offset[] = { 0x0000,
246 0x0400,
247 0x0800,
248 0x0C00,
249 0x0200,
250 0x0600,
251 0x0A00,
252 0x0E00
253 };
254
255 /* PCI related definitions */
256
257 #ifdef CONFIG_PCI
258 static const struct pci_device_id cy_pci_dev_id[] = {
259 /* PCI < 1Mb */
260 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
261 /* PCI > 1Mb */
262 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
263 /* 4Y PCI < 1Mb */
264 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
265 /* 4Y PCI > 1Mb */
266 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
267 /* 8Y PCI < 1Mb */
268 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
269 /* 8Y PCI > 1Mb */
270 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
271 /* Z PCI < 1Mb */
272 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
273 /* Z PCI > 1Mb */
274 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
275 { } /* end of table */
276 };
277 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
278 #endif
279
280 static void cy_start(struct tty_struct *);
281 static void cy_set_line_char(struct cyclades_port *, struct tty_struct *);
282 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
283 #ifdef CONFIG_ISA
284 static unsigned detect_isa_irq(void __iomem *);
285 #endif /* CONFIG_ISA */
286
287 #ifndef CONFIG_CYZ_INTR
288 static void cyz_poll(unsigned long);
289
290 /* The Cyclades-Z polling cycle is defined by this variable */
291 static long cyz_polling_cycle = CZ_DEF_POLL;
292
293 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
294
295 #else /* CONFIG_CYZ_INTR */
296 static void cyz_rx_restart(unsigned long);
297 static struct timer_list cyz_rx_full_timer[NR_PORTS];
298 #endif /* CONFIG_CYZ_INTR */
299
300 static inline void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
301 {
302 struct cyclades_card *card = port->card;
303
304 cy_writeb(port->u.cyy.base_addr + (reg << card->bus_index), val);
305 }
306
307 static inline u8 cyy_readb(struct cyclades_port *port, u32 reg)
308 {
309 struct cyclades_card *card = port->card;
310
311 return readb(port->u.cyy.base_addr + (reg << card->bus_index));
312 }
313
314 static inline bool cy_is_Z(struct cyclades_card *card)
315 {
316 return card->num_chips == (unsigned int)-1;
317 }
318
319 static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
320 {
321 return readl(&ctl_addr->init_ctrl) & (1 << 17);
322 }
323
324 static inline bool cyz_fpga_loaded(struct cyclades_card *card)
325 {
326 return __cyz_fpga_loaded(card->ctl_addr.p9060);
327 }
328
329 static inline bool cyz_is_loaded(struct cyclades_card *card)
330 {
331 struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
332
333 return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
334 readl(&fw_id->signature) == ZFIRM_ID;
335 }
336
337 static inline int serial_paranoia_check(struct cyclades_port *info,
338 const char *name, const char *routine)
339 {
340 #ifdef SERIAL_PARANOIA_CHECK
341 if (!info) {
342 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
343 "in %s\n", name, routine);
344 return 1;
345 }
346
347 if (info->magic != CYCLADES_MAGIC) {
348 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
349 "struct (%s) in %s\n", name, routine);
350 return 1;
351 }
352 #endif
353 return 0;
354 }
355
356 /***********************************************************/
357 /********* Start of block of Cyclom-Y specific code ********/
358
359 /* This routine waits up to 1000 micro-seconds for the previous
360 command to the Cirrus chip to complete and then issues the
361 new command. An error is returned if the previous command
362 didn't finish within the time limit.
363
364 This function is only called from inside spinlock-protected code.
365 */
366 static int __cyy_issue_cmd(void __iomem *base_addr, u8 cmd, int index)
367 {
368 void __iomem *ccr = base_addr + (CyCCR << index);
369 unsigned int i;
370
371 /* Check to see that the previous command has completed */
372 for (i = 0; i < 100; i++) {
373 if (readb(ccr) == 0)
374 break;
375 udelay(10L);
376 }
377 /* if the CCR never cleared, the previous command
378 didn't finish within the "reasonable time" */
379 if (i == 100)
380 return -1;
381
382 /* Issue the new command */
383 cy_writeb(ccr, cmd);
384
385 return 0;
386 }
387
388 static inline int cyy_issue_cmd(struct cyclades_port *port, u8 cmd)
389 {
390 return __cyy_issue_cmd(port->u.cyy.base_addr, cmd,
391 port->card->bus_index);
392 }
393
394 #ifdef CONFIG_ISA
395 /* ISA interrupt detection code */
396 static unsigned detect_isa_irq(void __iomem *address)
397 {
398 int irq;
399 unsigned long irqs, flags;
400 int save_xir, save_car;
401 int index = 0; /* IRQ probing is only for ISA */
402
403 /* forget possible initially masked and pending IRQ */
404 irq = probe_irq_off(probe_irq_on());
405
406 /* Clear interrupts on the board first */
407 cy_writeb(address + (Cy_ClrIntr << index), 0);
408 /* Cy_ClrIntr is 0x1800 */
409
410 irqs = probe_irq_on();
411 /* Wait ... */
412 msleep(5);
413
414 /* Enable the Tx interrupts on the CD1400 */
415 local_irq_save(flags);
416 cy_writeb(address + (CyCAR << index), 0);
417 __cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
418
419 cy_writeb(address + (CyCAR << index), 0);
420 cy_writeb(address + (CySRER << index),
421 readb(address + (CySRER << index)) | CyTxRdy);
422 local_irq_restore(flags);
423
424 /* Wait ... */
425 msleep(5);
426
427 /* Check which interrupt is in use */
428 irq = probe_irq_off(irqs);
429
430 /* Clean up */
431 save_xir = (u_char) readb(address + (CyTIR << index));
432 save_car = readb(address + (CyCAR << index));
433 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
434 cy_writeb(address + (CySRER << index),
435 readb(address + (CySRER << index)) & ~CyTxRdy);
436 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
437 cy_writeb(address + (CyCAR << index), (save_car));
438 cy_writeb(address + (Cy_ClrIntr << index), 0);
439 /* Cy_ClrIntr is 0x1800 */
440
441 return (irq > 0) ? irq : 0;
442 }
443 #endif /* CONFIG_ISA */
444
445 static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
446 void __iomem *base_addr)
447 {
448 struct cyclades_port *info;
449 struct tty_struct *tty;
450 int len, index = cinfo->bus_index;
451 u8 ivr, save_xir, channel, save_car, data, char_count;
452
453 #ifdef CY_DEBUG_INTERRUPTS
454 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
455 #endif
456 /* determine the channel & change to that context */
457 save_xir = readb(base_addr + (CyRIR << index));
458 channel = save_xir & CyIRChannel;
459 info = &cinfo->ports[channel + chip * 4];
460 save_car = cyy_readb(info, CyCAR);
461 cyy_writeb(info, CyCAR, save_xir);
462 ivr = cyy_readb(info, CyRIVR) & CyIVRMask;
463
464 tty = tty_port_tty_get(&info->port);
465 /* if there is nowhere to put the data, discard it */
466 if (tty == NULL) {
467 if (ivr == CyIVRRxEx) { /* exception */
468 data = cyy_readb(info, CyRDSR);
469 } else { /* normal character reception */
470 char_count = cyy_readb(info, CyRDCR);
471 while (char_count--)
472 data = cyy_readb(info, CyRDSR);
473 }
474 goto end;
475 }
476 /* there is an open port for this data */
477 if (ivr == CyIVRRxEx) { /* exception */
478 data = cyy_readb(info, CyRDSR);
479
480 /* For statistics only */
481 if (data & CyBREAK)
482 info->icount.brk++;
483 else if (data & CyFRAME)
484 info->icount.frame++;
485 else if (data & CyPARITY)
486 info->icount.parity++;
487 else if (data & CyOVERRUN)
488 info->icount.overrun++;
489
490 if (data & info->ignore_status_mask) {
491 info->icount.rx++;
492 tty_kref_put(tty);
493 return;
494 }
495 if (tty_buffer_request_room(tty, 1)) {
496 if (data & info->read_status_mask) {
497 if (data & CyBREAK) {
498 tty_insert_flip_char(tty,
499 cyy_readb(info, CyRDSR),
500 TTY_BREAK);
501 info->icount.rx++;
502 if (info->port.flags & ASYNC_SAK)
503 do_SAK(tty);
504 } else if (data & CyFRAME) {
505 tty_insert_flip_char(tty,
506 cyy_readb(info, CyRDSR),
507 TTY_FRAME);
508 info->icount.rx++;
509 info->idle_stats.frame_errs++;
510 } else if (data & CyPARITY) {
511 /* Pieces of seven... */
512 tty_insert_flip_char(tty,
513 cyy_readb(info, CyRDSR),
514 TTY_PARITY);
515 info->icount.rx++;
516 info->idle_stats.parity_errs++;
517 } else if (data & CyOVERRUN) {
518 tty_insert_flip_char(tty, 0,
519 TTY_OVERRUN);
520 info->icount.rx++;
521 /* If the flip buffer itself is
522 overflowing, we still lose
523 the next incoming character.
524 */
525 tty_insert_flip_char(tty,
526 cyy_readb(info, CyRDSR),
527 TTY_FRAME);
528 info->icount.rx++;
529 info->idle_stats.overruns++;
530 /* These two conditions may imply */
531 /* a normal read should be done. */
532 /* } else if(data & CyTIMEOUT) { */
533 /* } else if(data & CySPECHAR) { */
534 } else {
535 tty_insert_flip_char(tty, 0,
536 TTY_NORMAL);
537 info->icount.rx++;
538 }
539 } else {
540 tty_insert_flip_char(tty, 0, TTY_NORMAL);
541 info->icount.rx++;
542 }
543 } else {
544 /* there was a software buffer overrun and nothing
545 * could be done about it!!! */
546 info->icount.buf_overrun++;
547 info->idle_stats.overruns++;
548 }
549 } else { /* normal character reception */
550 /* load # chars available from the chip */
551 char_count = cyy_readb(info, CyRDCR);
552
553 #ifdef CY_ENABLE_MONITORING
554 ++info->mon.int_count;
555 info->mon.char_count += char_count;
556 if (char_count > info->mon.char_max)
557 info->mon.char_max = char_count;
558 info->mon.char_last = char_count;
559 #endif
560 len = tty_buffer_request_room(tty, char_count);
561 while (len--) {
562 data = cyy_readb(info, CyRDSR);
563 tty_insert_flip_char(tty, data, TTY_NORMAL);
564 info->idle_stats.recv_bytes++;
565 info->icount.rx++;
566 #ifdef CY_16Y_HACK
567 udelay(10L);
568 #endif
569 }
570 info->idle_stats.recv_idle = jiffies;
571 }
572 tty_schedule_flip(tty);
573 tty_kref_put(tty);
574 end:
575 /* end of service */
576 cyy_writeb(info, CyRIR, save_xir & 0x3f);
577 cyy_writeb(info, CyCAR, save_car);
578 }
579
580 static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
581 void __iomem *base_addr)
582 {
583 struct cyclades_port *info;
584 struct tty_struct *tty;
585 int char_count, index = cinfo->bus_index;
586 u8 save_xir, channel, save_car, outch;
587
588 /* Since we only get here when the transmit buffer
589 is empty, we know we can always stuff a dozen
590 characters. */
591 #ifdef CY_DEBUG_INTERRUPTS
592 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
593 #endif
594
595 /* determine the channel & change to that context */
596 save_xir = readb(base_addr + (CyTIR << index));
597 channel = save_xir & CyIRChannel;
598 save_car = readb(base_addr + (CyCAR << index));
599 cy_writeb(base_addr + (CyCAR << index), save_xir);
600
601 /* validate the port# (as configured and open) */
602 if (channel + chip * 4 >= cinfo->nports) {
603 cy_writeb(base_addr + (CySRER << index),
604 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
605 goto end;
606 }
607 info = &cinfo->ports[channel + chip * 4];
608 tty = tty_port_tty_get(&info->port);
609 if (tty == NULL) {
610 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
611 goto end;
612 }
613
614 /* load the on-chip space for outbound data */
615 char_count = info->xmit_fifo_size;
616
617 if (info->x_char) { /* send special char */
618 outch = info->x_char;
619 cyy_writeb(info, CyTDR, outch);
620 char_count--;
621 info->icount.tx++;
622 info->x_char = 0;
623 }
624
625 if (info->breakon || info->breakoff) {
626 if (info->breakon) {
627 cyy_writeb(info, CyTDR, 0);
628 cyy_writeb(info, CyTDR, 0x81);
629 info->breakon = 0;
630 char_count -= 2;
631 }
632 if (info->breakoff) {
633 cyy_writeb(info, CyTDR, 0);
634 cyy_writeb(info, CyTDR, 0x83);
635 info->breakoff = 0;
636 char_count -= 2;
637 }
638 }
639
640 while (char_count-- > 0) {
641 if (!info->xmit_cnt) {
642 if (cyy_readb(info, CySRER) & CyTxMpty) {
643 cyy_writeb(info, CySRER,
644 cyy_readb(info, CySRER) & ~CyTxMpty);
645 } else {
646 cyy_writeb(info, CySRER, CyTxMpty |
647 (cyy_readb(info, CySRER) & ~CyTxRdy));
648 }
649 goto done;
650 }
651 if (info->port.xmit_buf == NULL) {
652 cyy_writeb(info, CySRER,
653 cyy_readb(info, CySRER) & ~CyTxRdy);
654 goto done;
655 }
656 if (tty->stopped || tty->hw_stopped) {
657 cyy_writeb(info, CySRER,
658 cyy_readb(info, CySRER) & ~CyTxRdy);
659 goto done;
660 }
661 /* Because the Embedded Transmit Commands have been enabled,
662 * we must check to see if the escape character, NULL, is being
663 * sent. If it is, we must ensure that there is room for it to
664 * be doubled in the output stream. Therefore we no longer
665 * advance the pointer when the character is fetched, but
666 * rather wait until after the check for a NULL output
667 * character. This is necessary because there may not be room
668 * for the two chars needed to send a NULL.)
669 */
670 outch = info->port.xmit_buf[info->xmit_tail];
671 if (outch) {
672 info->xmit_cnt--;
673 info->xmit_tail = (info->xmit_tail + 1) &
674 (SERIAL_XMIT_SIZE - 1);
675 cyy_writeb(info, CyTDR, outch);
676 info->icount.tx++;
677 } else {
678 if (char_count > 1) {
679 info->xmit_cnt--;
680 info->xmit_tail = (info->xmit_tail + 1) &
681 (SERIAL_XMIT_SIZE - 1);
682 cyy_writeb(info, CyTDR, outch);
683 cyy_writeb(info, CyTDR, 0);
684 info->icount.tx++;
685 char_count--;
686 }
687 }
688 }
689
690 done:
691 tty_wakeup(tty);
692 tty_kref_put(tty);
693 end:
694 /* end of service */
695 cyy_writeb(info, CyTIR, save_xir & 0x3f);
696 cyy_writeb(info, CyCAR, save_car);
697 }
698
699 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
700 void __iomem *base_addr)
701 {
702 struct cyclades_port *info;
703 struct tty_struct *tty;
704 int index = cinfo->bus_index;
705 u8 save_xir, channel, save_car, mdm_change, mdm_status;
706
707 /* determine the channel & change to that context */
708 save_xir = readb(base_addr + (CyMIR << index));
709 channel = save_xir & CyIRChannel;
710 info = &cinfo->ports[channel + chip * 4];
711 save_car = cyy_readb(info, CyCAR);
712 cyy_writeb(info, CyCAR, save_xir);
713
714 mdm_change = cyy_readb(info, CyMISR);
715 mdm_status = cyy_readb(info, CyMSVR1);
716
717 tty = tty_port_tty_get(&info->port);
718 if (!tty)
719 goto end;
720
721 if (mdm_change & CyANY_DELTA) {
722 /* For statistics only */
723 if (mdm_change & CyDCD)
724 info->icount.dcd++;
725 if (mdm_change & CyCTS)
726 info->icount.cts++;
727 if (mdm_change & CyDSR)
728 info->icount.dsr++;
729 if (mdm_change & CyRI)
730 info->icount.rng++;
731
732 wake_up_interruptible(&info->port.delta_msr_wait);
733 }
734
735 if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
736 if (mdm_status & CyDCD)
737 wake_up_interruptible(&info->port.open_wait);
738 else
739 tty_hangup(tty);
740 }
741 if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
742 if (tty->hw_stopped) {
743 if (mdm_status & CyCTS) {
744 /* cy_start isn't used
745 because... !!! */
746 tty->hw_stopped = 0;
747 cyy_writeb(info, CySRER,
748 cyy_readb(info, CySRER) | CyTxRdy);
749 tty_wakeup(tty);
750 }
751 } else {
752 if (!(mdm_status & CyCTS)) {
753 /* cy_stop isn't used
754 because ... !!! */
755 tty->hw_stopped = 1;
756 cyy_writeb(info, CySRER,
757 cyy_readb(info, CySRER) & ~CyTxRdy);
758 }
759 }
760 }
761 /* if (mdm_change & CyDSR) {
762 }
763 if (mdm_change & CyRI) {
764 }*/
765 tty_kref_put(tty);
766 end:
767 /* end of service */
768 cyy_writeb(info, CyMIR, save_xir & 0x3f);
769 cyy_writeb(info, CyCAR, save_car);
770 }
771
772 /* The real interrupt service routine is called
773 whenever the card wants its hand held--chars
774 received, out buffer empty, modem change, etc.
775 */
776 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
777 {
778 int status;
779 struct cyclades_card *cinfo = dev_id;
780 void __iomem *base_addr, *card_base_addr;
781 unsigned int chip, too_many, had_work;
782 int index;
783
784 if (unlikely(cinfo == NULL)) {
785 #ifdef CY_DEBUG_INTERRUPTS
786 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
787 irq);
788 #endif
789 return IRQ_NONE; /* spurious interrupt */
790 }
791
792 card_base_addr = cinfo->base_addr;
793 index = cinfo->bus_index;
794
795 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
796 if (unlikely(card_base_addr == NULL))
797 return IRQ_HANDLED;
798
799 /* This loop checks all chips in the card. Make a note whenever
800 _any_ chip had some work to do, as this is considered an
801 indication that there will be more to do. Only when no chip
802 has any work does this outermost loop exit.
803 */
804 do {
805 had_work = 0;
806 for (chip = 0; chip < cinfo->num_chips; chip++) {
807 base_addr = cinfo->base_addr +
808 (cy_chip_offset[chip] << index);
809 too_many = 0;
810 while ((status = readb(base_addr +
811 (CySVRR << index))) != 0x00) {
812 had_work++;
813 /* The purpose of the following test is to ensure that
814 no chip can monopolize the driver. This forces the
815 chips to be checked in a round-robin fashion (after
816 draining each of a bunch (1000) of characters).
817 */
818 if (1000 < too_many++)
819 break;
820 spin_lock(&cinfo->card_lock);
821 if (status & CySRReceive) /* rx intr */
822 cyy_chip_rx(cinfo, chip, base_addr);
823 if (status & CySRTransmit) /* tx intr */
824 cyy_chip_tx(cinfo, chip, base_addr);
825 if (status & CySRModem) /* modem intr */
826 cyy_chip_modem(cinfo, chip, base_addr);
827 spin_unlock(&cinfo->card_lock);
828 }
829 }
830 } while (had_work);
831
832 /* clear interrupts */
833 spin_lock(&cinfo->card_lock);
834 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
835 /* Cy_ClrIntr is 0x1800 */
836 spin_unlock(&cinfo->card_lock);
837 return IRQ_HANDLED;
838 } /* cyy_interrupt */
839
840 static void cyy_change_rts_dtr(struct cyclades_port *info, unsigned int set,
841 unsigned int clear)
842 {
843 struct cyclades_card *card = info->card;
844 int channel = info->line - card->first_line;
845 u32 rts, dtr, msvrr, msvrd;
846
847 channel &= 0x03;
848
849 if (info->rtsdtr_inv) {
850 msvrr = CyMSVR2;
851 msvrd = CyMSVR1;
852 rts = CyDTR;
853 dtr = CyRTS;
854 } else {
855 msvrr = CyMSVR1;
856 msvrd = CyMSVR2;
857 rts = CyRTS;
858 dtr = CyDTR;
859 }
860 if (set & TIOCM_RTS) {
861 cyy_writeb(info, CyCAR, channel);
862 cyy_writeb(info, msvrr, rts);
863 }
864 if (clear & TIOCM_RTS) {
865 cyy_writeb(info, CyCAR, channel);
866 cyy_writeb(info, msvrr, ~rts);
867 }
868 if (set & TIOCM_DTR) {
869 cyy_writeb(info, CyCAR, channel);
870 cyy_writeb(info, msvrd, dtr);
871 #ifdef CY_DEBUG_DTR
872 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
873 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
874 cyy_readb(info, CyMSVR1),
875 cyy_readb(info, CyMSVR2));
876 #endif
877 }
878 if (clear & TIOCM_DTR) {
879 cyy_writeb(info, CyCAR, channel);
880 cyy_writeb(info, msvrd, ~dtr);
881 #ifdef CY_DEBUG_DTR
882 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
883 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
884 cyy_readb(info, CyMSVR1),
885 cyy_readb(info, CyMSVR2));
886 #endif
887 }
888 }
889
890 /***********************************************************/
891 /********* End of block of Cyclom-Y specific code **********/
892 /******** Start of block of Cyclades-Z specific code *******/
893 /***********************************************************/
894
895 static int
896 cyz_fetch_msg(struct cyclades_card *cinfo,
897 __u32 *channel, __u8 *cmd, __u32 *param)
898 {
899 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
900 unsigned long loc_doorbell;
901
902 loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
903 if (loc_doorbell) {
904 *cmd = (char)(0xff & loc_doorbell);
905 *channel = readl(&board_ctrl->fwcmd_channel);
906 *param = (__u32) readl(&board_ctrl->fwcmd_param);
907 cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
908 return 1;
909 }
910 return 0;
911 } /* cyz_fetch_msg */
912
913 static int
914 cyz_issue_cmd(struct cyclades_card *cinfo,
915 __u32 channel, __u8 cmd, __u32 param)
916 {
917 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
918 __u32 __iomem *pci_doorbell;
919 unsigned int index;
920
921 if (!cyz_is_loaded(cinfo))
922 return -1;
923
924 index = 0;
925 pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
926 while ((readl(pci_doorbell) & 0xff) != 0) {
927 if (index++ == 1000)
928 return (int)(readl(pci_doorbell) & 0xff);
929 udelay(50L);
930 }
931 cy_writel(&board_ctrl->hcmd_channel, channel);
932 cy_writel(&board_ctrl->hcmd_param, param);
933 cy_writel(pci_doorbell, (long)cmd);
934
935 return 0;
936 } /* cyz_issue_cmd */
937
938 static void cyz_handle_rx(struct cyclades_port *info, struct tty_struct *tty)
939 {
940 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
941 struct cyclades_card *cinfo = info->card;
942 unsigned int char_count;
943 int len;
944 #ifdef BLOCKMOVE
945 unsigned char *buf;
946 #else
947 char data;
948 #endif
949 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
950
951 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
952 rx_put = readl(&buf_ctrl->rx_put);
953 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
954 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
955 if (rx_put >= rx_get)
956 char_count = rx_put - rx_get;
957 else
958 char_count = rx_put - rx_get + rx_bufsize;
959
960 if (char_count) {
961 #ifdef CY_ENABLE_MONITORING
962 info->mon.int_count++;
963 info->mon.char_count += char_count;
964 if (char_count > info->mon.char_max)
965 info->mon.char_max = char_count;
966 info->mon.char_last = char_count;
967 #endif
968 if (tty == NULL) {
969 /* flush received characters */
970 new_rx_get = (new_rx_get + char_count) &
971 (rx_bufsize - 1);
972 info->rflush_count++;
973 } else {
974 #ifdef BLOCKMOVE
975 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
976 for performance, but because of buffer boundaries, there
977 may be several steps to the operation */
978 while (1) {
979 len = tty_prepare_flip_string(tty, &buf,
980 char_count);
981 if (!len)
982 break;
983
984 len = min_t(unsigned int, min(len, char_count),
985 rx_bufsize - new_rx_get);
986
987 memcpy_fromio(buf, cinfo->base_addr +
988 rx_bufaddr + new_rx_get, len);
989
990 new_rx_get = (new_rx_get + len) &
991 (rx_bufsize - 1);
992 char_count -= len;
993 info->icount.rx += len;
994 info->idle_stats.recv_bytes += len;
995 }
996 #else
997 len = tty_buffer_request_room(tty, char_count);
998 while (len--) {
999 data = readb(cinfo->base_addr + rx_bufaddr +
1000 new_rx_get);
1001 new_rx_get = (new_rx_get + 1) &
1002 (rx_bufsize - 1);
1003 tty_insert_flip_char(tty, data, TTY_NORMAL);
1004 info->idle_stats.recv_bytes++;
1005 info->icount.rx++;
1006 }
1007 #endif
1008 #ifdef CONFIG_CYZ_INTR
1009 /* Recalculate the number of chars in the RX buffer and issue
1010 a cmd in case it's higher than the RX high water mark */
1011 rx_put = readl(&buf_ctrl->rx_put);
1012 if (rx_put >= rx_get)
1013 char_count = rx_put - rx_get;
1014 else
1015 char_count = rx_put - rx_get + rx_bufsize;
1016 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
1017 !timer_pending(&cyz_rx_full_timer[
1018 info->line]))
1019 mod_timer(&cyz_rx_full_timer[info->line],
1020 jiffies + 1);
1021 #endif
1022 info->idle_stats.recv_idle = jiffies;
1023 tty_schedule_flip(tty);
1024 }
1025 /* Update rx_get */
1026 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1027 }
1028 }
1029
1030 static void cyz_handle_tx(struct cyclades_port *info, struct tty_struct *tty)
1031 {
1032 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
1033 struct cyclades_card *cinfo = info->card;
1034 u8 data;
1035 unsigned int char_count;
1036 #ifdef BLOCKMOVE
1037 int small_count;
1038 #endif
1039 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1040
1041 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1042 return;
1043
1044 tx_get = readl(&buf_ctrl->tx_get);
1045 tx_put = readl(&buf_ctrl->tx_put);
1046 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1047 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1048 if (tx_put >= tx_get)
1049 char_count = tx_get - tx_put - 1 + tx_bufsize;
1050 else
1051 char_count = tx_get - tx_put - 1;
1052
1053 if (char_count) {
1054
1055 if (tty == NULL)
1056 goto ztxdone;
1057
1058 if (info->x_char) { /* send special char */
1059 data = info->x_char;
1060
1061 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1062 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1063 info->x_char = 0;
1064 char_count--;
1065 info->icount.tx++;
1066 }
1067 #ifdef BLOCKMOVE
1068 while (0 < (small_count = min_t(unsigned int,
1069 tx_bufsize - tx_put, min_t(unsigned int,
1070 (SERIAL_XMIT_SIZE - info->xmit_tail),
1071 min_t(unsigned int, info->xmit_cnt,
1072 char_count))))) {
1073
1074 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1075 tx_put),
1076 &info->port.xmit_buf[info->xmit_tail],
1077 small_count);
1078
1079 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1080 char_count -= small_count;
1081 info->icount.tx += small_count;
1082 info->xmit_cnt -= small_count;
1083 info->xmit_tail = (info->xmit_tail + small_count) &
1084 (SERIAL_XMIT_SIZE - 1);
1085 }
1086 #else
1087 while (info->xmit_cnt && char_count) {
1088 data = info->port.xmit_buf[info->xmit_tail];
1089 info->xmit_cnt--;
1090 info->xmit_tail = (info->xmit_tail + 1) &
1091 (SERIAL_XMIT_SIZE - 1);
1092
1093 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1094 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1095 char_count--;
1096 info->icount.tx++;
1097 }
1098 #endif
1099 tty_wakeup(tty);
1100 ztxdone:
1101 /* Update tx_put */
1102 cy_writel(&buf_ctrl->tx_put, tx_put);
1103 }
1104 }
1105
1106 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1107 {
1108 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
1109 struct tty_struct *tty;
1110 struct cyclades_port *info;
1111 __u32 channel, param, fw_ver;
1112 __u8 cmd;
1113 int special_count;
1114 int delta_count;
1115
1116 fw_ver = readl(&board_ctrl->fw_version);
1117
1118 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1119 special_count = 0;
1120 delta_count = 0;
1121 info = &cinfo->ports[channel];
1122 tty = tty_port_tty_get(&info->port);
1123 if (tty == NULL)
1124 continue;
1125
1126 switch (cmd) {
1127 case C_CM_PR_ERROR:
1128 tty_insert_flip_char(tty, 0, TTY_PARITY);
1129 info->icount.rx++;
1130 special_count++;
1131 break;
1132 case C_CM_FR_ERROR:
1133 tty_insert_flip_char(tty, 0, TTY_FRAME);
1134 info->icount.rx++;
1135 special_count++;
1136 break;
1137 case C_CM_RXBRK:
1138 tty_insert_flip_char(tty, 0, TTY_BREAK);
1139 info->icount.rx++;
1140 special_count++;
1141 break;
1142 case C_CM_MDCD:
1143 info->icount.dcd++;
1144 delta_count++;
1145 if (info->port.flags & ASYNC_CHECK_CD) {
1146 u32 dcd = fw_ver > 241 ? param :
1147 readl(&info->u.cyz.ch_ctrl->rs_status);
1148 if (dcd & C_RS_DCD)
1149 wake_up_interruptible(&info->port.open_wait);
1150 else
1151 tty_hangup(tty);
1152 }
1153 break;
1154 case C_CM_MCTS:
1155 info->icount.cts++;
1156 delta_count++;
1157 break;
1158 case C_CM_MRI:
1159 info->icount.rng++;
1160 delta_count++;
1161 break;
1162 case C_CM_MDSR:
1163 info->icount.dsr++;
1164 delta_count++;
1165 break;
1166 #ifdef Z_WAKE
1167 case C_CM_IOCTLW:
1168 complete(&info->shutdown_wait);
1169 break;
1170 #endif
1171 #ifdef CONFIG_CYZ_INTR
1172 case C_CM_RXHIWM:
1173 case C_CM_RXNNDT:
1174 case C_CM_INTBACK2:
1175 /* Reception Interrupt */
1176 #ifdef CY_DEBUG_INTERRUPTS
1177 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1178 "port %ld\n", info->card, channel);
1179 #endif
1180 cyz_handle_rx(info, tty);
1181 break;
1182 case C_CM_TXBEMPTY:
1183 case C_CM_TXLOWWM:
1184 case C_CM_INTBACK:
1185 /* Transmission Interrupt */
1186 #ifdef CY_DEBUG_INTERRUPTS
1187 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1188 "port %ld\n", info->card, channel);
1189 #endif
1190 cyz_handle_tx(info, tty);
1191 break;
1192 #endif /* CONFIG_CYZ_INTR */
1193 case C_CM_FATAL:
1194 /* should do something with this !!! */
1195 break;
1196 default:
1197 break;
1198 }
1199 if (delta_count)
1200 wake_up_interruptible(&info->port.delta_msr_wait);
1201 if (special_count)
1202 tty_schedule_flip(tty);
1203 tty_kref_put(tty);
1204 }
1205 }
1206
1207 #ifdef CONFIG_CYZ_INTR
1208 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1209 {
1210 struct cyclades_card *cinfo = dev_id;
1211
1212 if (unlikely(!cyz_is_loaded(cinfo))) {
1213 #ifdef CY_DEBUG_INTERRUPTS
1214 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1215 "(IRQ%d).\n", irq);
1216 #endif
1217 return IRQ_NONE;
1218 }
1219
1220 /* Handle the interrupts */
1221 cyz_handle_cmd(cinfo);
1222
1223 return IRQ_HANDLED;
1224 } /* cyz_interrupt */
1225
1226 static void cyz_rx_restart(unsigned long arg)
1227 {
1228 struct cyclades_port *info = (struct cyclades_port *)arg;
1229 struct cyclades_card *card = info->card;
1230 int retval;
1231 __u32 channel = info->line - card->first_line;
1232 unsigned long flags;
1233
1234 spin_lock_irqsave(&card->card_lock, flags);
1235 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1236 if (retval != 0) {
1237 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1238 info->line, retval);
1239 }
1240 spin_unlock_irqrestore(&card->card_lock, flags);
1241 }
1242
1243 #else /* CONFIG_CYZ_INTR */
1244
1245 static void cyz_poll(unsigned long arg)
1246 {
1247 struct cyclades_card *cinfo;
1248 struct cyclades_port *info;
1249 unsigned long expires = jiffies + HZ;
1250 unsigned int port, card;
1251
1252 for (card = 0; card < NR_CARDS; card++) {
1253 cinfo = &cy_card[card];
1254
1255 if (!cy_is_Z(cinfo))
1256 continue;
1257 if (!cyz_is_loaded(cinfo))
1258 continue;
1259
1260 /* Skip first polling cycle to avoid racing conditions with the FW */
1261 if (!cinfo->intr_enabled) {
1262 cinfo->intr_enabled = 1;
1263 continue;
1264 }
1265
1266 cyz_handle_cmd(cinfo);
1267
1268 for (port = 0; port < cinfo->nports; port++) {
1269 struct tty_struct *tty;
1270
1271 info = &cinfo->ports[port];
1272 tty = tty_port_tty_get(&info->port);
1273 /* OK to pass NULL to the handle functions below.
1274 They need to drop the data in that case. */
1275
1276 if (!info->throttle)
1277 cyz_handle_rx(info, tty);
1278 cyz_handle_tx(info, tty);
1279 tty_kref_put(tty);
1280 }
1281 /* poll every 'cyz_polling_cycle' period */
1282 expires = jiffies + cyz_polling_cycle;
1283 }
1284 mod_timer(&cyz_timerlist, expires);
1285 } /* cyz_poll */
1286
1287 #endif /* CONFIG_CYZ_INTR */
1288
1289 /********** End of block of Cyclades-Z specific code *********/
1290 /***********************************************************/
1291
1292 /* This is called whenever a port becomes active;
1293 interrupts are enabled and DTR & RTS are turned on.
1294 */
1295 static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
1296 {
1297 struct cyclades_card *card;
1298 unsigned long flags;
1299 int retval = 0;
1300 int channel;
1301 unsigned long page;
1302
1303 card = info->card;
1304 channel = info->line - card->first_line;
1305
1306 page = get_zeroed_page(GFP_KERNEL);
1307 if (!page)
1308 return -ENOMEM;
1309
1310 spin_lock_irqsave(&card->card_lock, flags);
1311
1312 if (info->port.flags & ASYNC_INITIALIZED)
1313 goto errout;
1314
1315 if (!info->type) {
1316 set_bit(TTY_IO_ERROR, &tty->flags);
1317 goto errout;
1318 }
1319
1320 if (info->port.xmit_buf)
1321 free_page(page);
1322 else
1323 info->port.xmit_buf = (unsigned char *)page;
1324
1325 spin_unlock_irqrestore(&card->card_lock, flags);
1326
1327 cy_set_line_char(info, tty);
1328
1329 if (!cy_is_Z(card)) {
1330 channel &= 0x03;
1331
1332 spin_lock_irqsave(&card->card_lock, flags);
1333
1334 cyy_writeb(info, CyCAR, channel);
1335
1336 cyy_writeb(info, CyRTPR,
1337 (info->default_timeout ? info->default_timeout : 0x02));
1338 /* 10ms rx timeout */
1339
1340 cyy_issue_cmd(info, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR);
1341
1342 cyy_change_rts_dtr(info, TIOCM_RTS | TIOCM_DTR, 0);
1343
1344 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyRxData);
1345 } else {
1346 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
1347
1348 if (!cyz_is_loaded(card))
1349 return -ENODEV;
1350
1351 #ifdef CY_DEBUG_OPEN
1352 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1353 "base_addr %p\n", card, channel, card->base_addr);
1354 #endif
1355 spin_lock_irqsave(&card->card_lock, flags);
1356
1357 cy_writel(&ch_ctrl->op_mode, C_CH_ENABLE);
1358 #ifdef Z_WAKE
1359 #ifdef CONFIG_CYZ_INTR
1360 cy_writel(&ch_ctrl->intr_enable,
1361 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1362 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1363 #else
1364 cy_writel(&ch_ctrl->intr_enable,
1365 C_IN_IOCTLW | C_IN_MDCD);
1366 #endif /* CONFIG_CYZ_INTR */
1367 #else
1368 #ifdef CONFIG_CYZ_INTR
1369 cy_writel(&ch_ctrl->intr_enable,
1370 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1371 C_IN_RXNNDT | C_IN_MDCD);
1372 #else
1373 cy_writel(&ch_ctrl->intr_enable, C_IN_MDCD);
1374 #endif /* CONFIG_CYZ_INTR */
1375 #endif /* Z_WAKE */
1376
1377 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1378 if (retval != 0) {
1379 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1380 "%x\n", info->line, retval);
1381 }
1382
1383 /* Flush RX buffers before raising DTR and RTS */
1384 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1385 if (retval != 0) {
1386 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1387 "%x\n", info->line, retval);
1388 }
1389
1390 /* set timeout !!! */
1391 /* set RTS and DTR !!! */
1392 tty_port_raise_dtr_rts(&info->port);
1393
1394 /* enable send, recv, modem !!! */
1395 }
1396
1397 info->port.flags |= ASYNC_INITIALIZED;
1398
1399 clear_bit(TTY_IO_ERROR, &tty->flags);
1400 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1401 info->breakon = info->breakoff = 0;
1402 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1403 info->idle_stats.in_use =
1404 info->idle_stats.recv_idle =
1405 info->idle_stats.xmit_idle = jiffies;
1406
1407 spin_unlock_irqrestore(&card->card_lock, flags);
1408
1409 #ifdef CY_DEBUG_OPEN
1410 printk(KERN_DEBUG "cyc startup done\n");
1411 #endif
1412 return 0;
1413
1414 errout:
1415 spin_unlock_irqrestore(&card->card_lock, flags);
1416 free_page(page);
1417 return retval;
1418 } /* startup */
1419
1420 static void start_xmit(struct cyclades_port *info)
1421 {
1422 struct cyclades_card *card = info->card;
1423 unsigned long flags;
1424 int channel = info->line - card->first_line;
1425
1426 if (!cy_is_Z(card)) {
1427 spin_lock_irqsave(&card->card_lock, flags);
1428 cyy_writeb(info, CyCAR, channel & 0x03);
1429 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
1430 spin_unlock_irqrestore(&card->card_lock, flags);
1431 } else {
1432 #ifdef CONFIG_CYZ_INTR
1433 int retval;
1434
1435 spin_lock_irqsave(&card->card_lock, flags);
1436 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
1437 if (retval != 0) {
1438 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
1439 "%x\n", info->line, retval);
1440 }
1441 spin_unlock_irqrestore(&card->card_lock, flags);
1442 #else /* CONFIG_CYZ_INTR */
1443 /* Don't have to do anything at this time */
1444 #endif /* CONFIG_CYZ_INTR */
1445 }
1446 } /* start_xmit */
1447
1448 /*
1449 * This routine shuts down a serial port; interrupts are disabled,
1450 * and DTR is dropped if the hangup on close termio flag is on.
1451 */
1452 static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
1453 {
1454 struct cyclades_card *card;
1455 unsigned long flags;
1456 int channel;
1457
1458 if (!(info->port.flags & ASYNC_INITIALIZED))
1459 return;
1460
1461 card = info->card;
1462 channel = info->line - card->first_line;
1463 if (!cy_is_Z(card)) {
1464 spin_lock_irqsave(&card->card_lock, flags);
1465
1466 /* Clear delta_msr_wait queue to avoid mem leaks. */
1467 wake_up_interruptible(&info->port.delta_msr_wait);
1468
1469 if (info->port.xmit_buf) {
1470 unsigned char *temp;
1471 temp = info->port.xmit_buf;
1472 info->port.xmit_buf = NULL;
1473 free_page((unsigned long)temp);
1474 }
1475 if (tty->termios->c_cflag & HUPCL)
1476 cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR);
1477
1478 cyy_issue_cmd(info, CyCHAN_CTL | CyDIS_RCVR);
1479 /* it may be appropriate to clear _XMIT at
1480 some later date (after testing)!!! */
1481
1482 set_bit(TTY_IO_ERROR, &tty->flags);
1483 info->port.flags &= ~ASYNC_INITIALIZED;
1484 spin_unlock_irqrestore(&card->card_lock, flags);
1485 } else {
1486 #ifdef CY_DEBUG_OPEN
1487 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
1488 "base_addr %p\n", card, channel, card->base_addr);
1489 #endif
1490
1491 if (!cyz_is_loaded(card))
1492 return;
1493
1494 spin_lock_irqsave(&card->card_lock, flags);
1495
1496 if (info->port.xmit_buf) {
1497 unsigned char *temp;
1498 temp = info->port.xmit_buf;
1499 info->port.xmit_buf = NULL;
1500 free_page((unsigned long)temp);
1501 }
1502
1503 if (tty->termios->c_cflag & HUPCL)
1504 tty_port_lower_dtr_rts(&info->port);
1505
1506 set_bit(TTY_IO_ERROR, &tty->flags);
1507 info->port.flags &= ~ASYNC_INITIALIZED;
1508
1509 spin_unlock_irqrestore(&card->card_lock, flags);
1510 }
1511
1512 #ifdef CY_DEBUG_OPEN
1513 printk(KERN_DEBUG "cyc shutdown done\n");
1514 #endif
1515 } /* shutdown */
1516
1517 /*
1518 * ------------------------------------------------------------
1519 * cy_open() and friends
1520 * ------------------------------------------------------------
1521 */
1522
1523 /*
1524 * This routine is called whenever a serial port is opened. It
1525 * performs the serial-specific initialization for the tty structure.
1526 */
1527 static int cy_open(struct tty_struct *tty, struct file *filp)
1528 {
1529 struct cyclades_port *info;
1530 unsigned int i, line;
1531 int retval;
1532
1533 line = tty->index;
1534 if (tty->index < 0 || NR_PORTS <= line)
1535 return -ENODEV;
1536
1537 for (i = 0; i < NR_CARDS; i++)
1538 if (line < cy_card[i].first_line + cy_card[i].nports &&
1539 line >= cy_card[i].first_line)
1540 break;
1541 if (i >= NR_CARDS)
1542 return -ENODEV;
1543 info = &cy_card[i].ports[line - cy_card[i].first_line];
1544 if (info->line < 0)
1545 return -ENODEV;
1546
1547 /* If the card's firmware hasn't been loaded,
1548 treat it as absent from the system. This
1549 will make the user pay attention.
1550 */
1551 if (cy_is_Z(info->card)) {
1552 struct cyclades_card *cinfo = info->card;
1553 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
1554
1555 if (!cyz_is_loaded(cinfo)) {
1556 if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
1557 readl(&firm_id->signature) ==
1558 ZFIRM_HLT) {
1559 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
1560 "need an external power supply for "
1561 "this number of ports.\nFirmware "
1562 "halted.\n");
1563 } else {
1564 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
1565 "yet loaded\n");
1566 }
1567 return -ENODEV;
1568 }
1569 #ifdef CONFIG_CYZ_INTR
1570 else {
1571 /* In case this Z board is operating in interrupt mode, its
1572 interrupts should be enabled as soon as the first open
1573 happens to one of its ports. */
1574 if (!cinfo->intr_enabled) {
1575 u16 intr;
1576
1577 /* Enable interrupts on the PLX chip */
1578 intr = readw(&cinfo->ctl_addr.p9060->
1579 intr_ctrl_stat) | 0x0900;
1580 cy_writew(&cinfo->ctl_addr.p9060->
1581 intr_ctrl_stat, intr);
1582 /* Enable interrupts on the FW */
1583 retval = cyz_issue_cmd(cinfo, 0,
1584 C_CM_IRQ_ENBL, 0L);
1585 if (retval != 0) {
1586 printk(KERN_ERR "cyc:IRQ enable retval "
1587 "was %x\n", retval);
1588 }
1589 cinfo->intr_enabled = 1;
1590 }
1591 }
1592 #endif /* CONFIG_CYZ_INTR */
1593 /* Make sure this Z port really exists in hardware */
1594 if (info->line > (cinfo->first_line + cinfo->nports - 1))
1595 return -ENODEV;
1596 }
1597 #ifdef CY_DEBUG_OTHER
1598 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
1599 #endif
1600 tty->driver_data = info;
1601 if (serial_paranoia_check(info, tty->name, "cy_open"))
1602 return -ENODEV;
1603
1604 #ifdef CY_DEBUG_OPEN
1605 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
1606 info->port.count);
1607 #endif
1608 info->port.count++;
1609 #ifdef CY_DEBUG_COUNT
1610 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
1611 current->pid, info->port.count);
1612 #endif
1613
1614 /*
1615 * If the port is the middle of closing, bail out now
1616 */
1617 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
1618 wait_event_interruptible(info->port.close_wait,
1619 !(info->port.flags & ASYNC_CLOSING));
1620 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
1621 }
1622
1623 /*
1624 * Start up serial port
1625 */
1626 retval = cy_startup(info, tty);
1627 if (retval)
1628 return retval;
1629
1630 retval = tty_port_block_til_ready(&info->port, tty, filp);
1631 if (retval) {
1632 #ifdef CY_DEBUG_OPEN
1633 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
1634 "with %d\n", retval);
1635 #endif
1636 return retval;
1637 }
1638
1639 info->throttle = 0;
1640 tty_port_tty_set(&info->port, tty);
1641
1642 #ifdef CY_DEBUG_OPEN
1643 printk(KERN_DEBUG "cyc:cy_open done\n");
1644 #endif
1645 return 0;
1646 } /* cy_open */
1647
1648 /*
1649 * cy_wait_until_sent() --- wait until the transmitter is empty
1650 */
1651 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1652 {
1653 struct cyclades_card *card;
1654 struct cyclades_port *info = tty->driver_data;
1655 unsigned long orig_jiffies;
1656 int char_time;
1657
1658 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
1659 return;
1660
1661 if (info->xmit_fifo_size == 0)
1662 return; /* Just in case.... */
1663
1664 orig_jiffies = jiffies;
1665 lock_kernel();
1666 /*
1667 * Set the check interval to be 1/5 of the estimated time to
1668 * send a single character, and make it at least 1. The check
1669 * interval should also be less than the timeout.
1670 *
1671 * Note: we have to use pretty tight timings here to satisfy
1672 * the NIST-PCTS.
1673 */
1674 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1675 char_time = char_time / 5;
1676 if (char_time <= 0)
1677 char_time = 1;
1678 if (timeout < 0)
1679 timeout = 0;
1680 if (timeout)
1681 char_time = min(char_time, timeout);
1682 /*
1683 * If the transmitter hasn't cleared in twice the approximate
1684 * amount of time to send the entire FIFO, it probably won't
1685 * ever clear. This assumes the UART isn't doing flow
1686 * control, which is currently the case. Hence, if it ever
1687 * takes longer than info->timeout, this is probably due to a
1688 * UART bug of some kind. So, we clamp the timeout parameter at
1689 * 2*info->timeout.
1690 */
1691 if (!timeout || timeout > 2 * info->timeout)
1692 timeout = 2 * info->timeout;
1693 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
1694 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
1695 timeout, char_time, jiffies);
1696 #endif
1697 card = info->card;
1698 if (!cy_is_Z(card)) {
1699 while (cyy_readb(info, CySRER) & CyTxRdy) {
1700 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
1701 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
1702 #endif
1703 if (msleep_interruptible(jiffies_to_msecs(char_time)))
1704 break;
1705 if (timeout && time_after(jiffies, orig_jiffies +
1706 timeout))
1707 break;
1708 }
1709 }
1710 /* Run one more char cycle */
1711 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1712 unlock_kernel();
1713 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
1714 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
1715 #endif
1716 }
1717
1718 static void cy_flush_buffer(struct tty_struct *tty)
1719 {
1720 struct cyclades_port *info = tty->driver_data;
1721 struct cyclades_card *card;
1722 int channel, retval;
1723 unsigned long flags;
1724
1725 #ifdef CY_DEBUG_IO
1726 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
1727 #endif
1728
1729 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
1730 return;
1731
1732 card = info->card;
1733 channel = info->line - card->first_line;
1734
1735 spin_lock_irqsave(&card->card_lock, flags);
1736 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1737 spin_unlock_irqrestore(&card->card_lock, flags);
1738
1739 if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
1740 buffers as well */
1741 spin_lock_irqsave(&card->card_lock, flags);
1742 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
1743 if (retval != 0) {
1744 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
1745 "was %x\n", info->line, retval);
1746 }
1747 spin_unlock_irqrestore(&card->card_lock, flags);
1748 }
1749 tty_wakeup(tty);
1750 } /* cy_flush_buffer */
1751
1752
1753 static void cy_do_close(struct tty_port *port)
1754 {
1755 struct cyclades_port *info = container_of(port, struct cyclades_port,
1756 port);
1757 struct cyclades_card *card;
1758 unsigned long flags;
1759 int channel;
1760
1761 card = info->card;
1762 channel = info->line - card->first_line;
1763 spin_lock_irqsave(&card->card_lock, flags);
1764
1765 if (!cy_is_Z(card)) {
1766 /* Stop accepting input */
1767 cyy_writeb(info, CyCAR, channel & 0x03);
1768 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyRxData);
1769 if (info->port.flags & ASYNC_INITIALIZED) {
1770 /* Waiting for on-board buffers to be empty before
1771 closing the port */
1772 spin_unlock_irqrestore(&card->card_lock, flags);
1773 cy_wait_until_sent(port->tty, info->timeout);
1774 spin_lock_irqsave(&card->card_lock, flags);
1775 }
1776 } else {
1777 #ifdef Z_WAKE
1778 /* Waiting for on-board buffers to be empty before closing
1779 the port */
1780 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
1781 int retval;
1782
1783 if (readl(&ch_ctrl->flow_status) != C_FS_TXIDLE) {
1784 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
1785 if (retval != 0) {
1786 printk(KERN_DEBUG "cyc:cy_close retval on "
1787 "ttyC%d was %x\n", info->line, retval);
1788 }
1789 spin_unlock_irqrestore(&card->card_lock, flags);
1790 wait_for_completion_interruptible(&info->shutdown_wait);
1791 spin_lock_irqsave(&card->card_lock, flags);
1792 }
1793 #endif
1794 }
1795 spin_unlock_irqrestore(&card->card_lock, flags);
1796 cy_shutdown(info, port->tty);
1797 }
1798
1799 /*
1800 * This routine is called when a particular tty device is closed.
1801 */
1802 static void cy_close(struct tty_struct *tty, struct file *filp)
1803 {
1804 struct cyclades_port *info = tty->driver_data;
1805 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
1806 return;
1807 tty_port_close(&info->port, tty, filp);
1808 } /* cy_close */
1809
1810 /* This routine gets called when tty_write has put something into
1811 * the write_queue. The characters may come from user space or
1812 * kernel space.
1813 *
1814 * This routine will return the number of characters actually
1815 * accepted for writing.
1816 *
1817 * If the port is not already transmitting stuff, start it off by
1818 * enabling interrupts. The interrupt service routine will then
1819 * ensure that the characters are sent.
1820 * If the port is already active, there is no need to kick it.
1821 *
1822 */
1823 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1824 {
1825 struct cyclades_port *info = tty->driver_data;
1826 unsigned long flags;
1827 int c, ret = 0;
1828
1829 #ifdef CY_DEBUG_IO
1830 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
1831 #endif
1832
1833 if (serial_paranoia_check(info, tty->name, "cy_write"))
1834 return 0;
1835
1836 if (!info->port.xmit_buf)
1837 return 0;
1838
1839 spin_lock_irqsave(&info->card->card_lock, flags);
1840 while (1) {
1841 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
1842 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
1843
1844 if (c <= 0)
1845 break;
1846
1847 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1848 info->xmit_head = (info->xmit_head + c) &
1849 (SERIAL_XMIT_SIZE - 1);
1850 info->xmit_cnt += c;
1851 buf += c;
1852 count -= c;
1853 ret += c;
1854 }
1855 spin_unlock_irqrestore(&info->card->card_lock, flags);
1856
1857 info->idle_stats.xmit_bytes += ret;
1858 info->idle_stats.xmit_idle = jiffies;
1859
1860 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1861 start_xmit(info);
1862
1863 return ret;
1864 } /* cy_write */
1865
1866 /*
1867 * This routine is called by the kernel to write a single
1868 * character to the tty device. If the kernel uses this routine,
1869 * it must call the flush_chars() routine (if defined) when it is
1870 * done stuffing characters into the driver. If there is no room
1871 * in the queue, the character is ignored.
1872 */
1873 static int cy_put_char(struct tty_struct *tty, unsigned char ch)
1874 {
1875 struct cyclades_port *info = tty->driver_data;
1876 unsigned long flags;
1877
1878 #ifdef CY_DEBUG_IO
1879 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
1880 #endif
1881
1882 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
1883 return 0;
1884
1885 if (!info->port.xmit_buf)
1886 return 0;
1887
1888 spin_lock_irqsave(&info->card->card_lock, flags);
1889 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
1890 spin_unlock_irqrestore(&info->card->card_lock, flags);
1891 return 0;
1892 }
1893
1894 info->port.xmit_buf[info->xmit_head++] = ch;
1895 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1896 info->xmit_cnt++;
1897 info->idle_stats.xmit_bytes++;
1898 info->idle_stats.xmit_idle = jiffies;
1899 spin_unlock_irqrestore(&info->card->card_lock, flags);
1900 return 1;
1901 } /* cy_put_char */
1902
1903 /*
1904 * This routine is called by the kernel after it has written a
1905 * series of characters to the tty device using put_char().
1906 */
1907 static void cy_flush_chars(struct tty_struct *tty)
1908 {
1909 struct cyclades_port *info = tty->driver_data;
1910
1911 #ifdef CY_DEBUG_IO
1912 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
1913 #endif
1914
1915 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
1916 return;
1917
1918 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1919 !info->port.xmit_buf)
1920 return;
1921
1922 start_xmit(info);
1923 } /* cy_flush_chars */
1924
1925 /*
1926 * This routine returns the numbers of characters the tty driver
1927 * will accept for queuing to be written. This number is subject
1928 * to change as output buffers get emptied, or if the output flow
1929 * control is activated.
1930 */
1931 static int cy_write_room(struct tty_struct *tty)
1932 {
1933 struct cyclades_port *info = tty->driver_data;
1934 int ret;
1935
1936 #ifdef CY_DEBUG_IO
1937 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
1938 #endif
1939
1940 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
1941 return 0;
1942 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1943 if (ret < 0)
1944 ret = 0;
1945 return ret;
1946 } /* cy_write_room */
1947
1948 static int cy_chars_in_buffer(struct tty_struct *tty)
1949 {
1950 struct cyclades_port *info = tty->driver_data;
1951
1952 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
1953 return 0;
1954
1955 #ifdef Z_EXT_CHARS_IN_BUFFER
1956 if (!cy_is_Z(info->card)) {
1957 #endif /* Z_EXT_CHARS_IN_BUFFER */
1958 #ifdef CY_DEBUG_IO
1959 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
1960 info->line, info->xmit_cnt);
1961 #endif
1962 return info->xmit_cnt;
1963 #ifdef Z_EXT_CHARS_IN_BUFFER
1964 } else {
1965 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
1966 int char_count;
1967 __u32 tx_put, tx_get, tx_bufsize;
1968
1969 lock_kernel();
1970 tx_get = readl(&buf_ctrl->tx_get);
1971 tx_put = readl(&buf_ctrl->tx_put);
1972 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1973 if (tx_put >= tx_get)
1974 char_count = tx_put - tx_get;
1975 else
1976 char_count = tx_put - tx_get + tx_bufsize;
1977 #ifdef CY_DEBUG_IO
1978 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
1979 info->line, info->xmit_cnt + char_count);
1980 #endif
1981 unlock_kernel();
1982 return info->xmit_cnt + char_count;
1983 }
1984 #endif /* Z_EXT_CHARS_IN_BUFFER */
1985 } /* cy_chars_in_buffer */
1986
1987 /*
1988 * ------------------------------------------------------------
1989 * cy_ioctl() and friends
1990 * ------------------------------------------------------------
1991 */
1992
1993 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1994 {
1995 int co, co_val, bpr;
1996 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
1997 25000000);
1998
1999 if (baud == 0) {
2000 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2001 return;
2002 }
2003
2004 /* determine which prescaler to use */
2005 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2006 if (cy_clock / co_val / baud > 63)
2007 break;
2008 }
2009
2010 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2011 if (bpr > 255)
2012 bpr = 255;
2013
2014 info->tbpr = info->rbpr = bpr;
2015 info->tco = info->rco = co;
2016 }
2017
2018 /*
2019 * This routine finds or computes the various line characteristics.
2020 * It used to be called config_setup
2021 */
2022 static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
2023 {
2024 struct cyclades_card *card;
2025 unsigned long flags;
2026 int channel;
2027 unsigned cflag, iflag;
2028 int baud, baud_rate = 0;
2029 int i;
2030
2031 if (!tty->termios) /* XXX can this happen at all? */
2032 return;
2033
2034 if (info->line == -1)
2035 return;
2036
2037 cflag = tty->termios->c_cflag;
2038 iflag = tty->termios->c_iflag;
2039
2040 /*
2041 * Set up the tty->alt_speed kludge
2042 */
2043 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2044 tty->alt_speed = 57600;
2045 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2046 tty->alt_speed = 115200;
2047 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2048 tty->alt_speed = 230400;
2049 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2050 tty->alt_speed = 460800;
2051
2052 card = info->card;
2053 channel = info->line - card->first_line;
2054
2055 if (!cy_is_Z(card)) {
2056 u32 cflags;
2057
2058 /* baud rate */
2059 baud = tty_get_baud_rate(tty);
2060 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2061 ASYNC_SPD_CUST) {
2062 if (info->custom_divisor)
2063 baud_rate = info->baud / info->custom_divisor;
2064 else
2065 baud_rate = info->baud;
2066 } else if (baud > CD1400_MAX_SPEED) {
2067 baud = CD1400_MAX_SPEED;
2068 }
2069 /* find the baud index */
2070 for (i = 0; i < 20; i++) {
2071 if (baud == baud_table[i])
2072 break;
2073 }
2074 if (i == 20)
2075 i = 19; /* CD1400_MAX_SPEED */
2076
2077 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2078 ASYNC_SPD_CUST) {
2079 cyy_baud_calc(info, baud_rate);
2080 } else {
2081 if (info->chip_rev >= CD1400_REV_J) {
2082 /* It is a CD1400 rev. J or later */
2083 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
2084 info->tco = baud_co_60[i]; /* Tx CO */
2085 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
2086 info->rco = baud_co_60[i]; /* Rx CO */
2087 } else {
2088 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
2089 info->tco = baud_co_25[i]; /* Tx CO */
2090 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
2091 info->rco = baud_co_25[i]; /* Rx CO */
2092 }
2093 }
2094 if (baud_table[i] == 134) {
2095 /* get it right for 134.5 baud */
2096 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
2097 2;
2098 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2099 ASYNC_SPD_CUST) {
2100 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2101 baud_rate) + 2;
2102 } else if (baud_table[i]) {
2103 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2104 baud_table[i]) + 2;
2105 /* this needs to be propagated into the card info */
2106 } else {
2107 info->timeout = 0;
2108 }
2109 /* By tradition (is it a standard?) a baud rate of zero
2110 implies the line should be/has been closed. A bit
2111 later in this routine such a test is performed. */
2112
2113 /* byte size and parity */
2114 info->cor5 = 0;
2115 info->cor4 = 0;
2116 /* receive threshold */
2117 info->cor3 = (info->default_threshold ?
2118 info->default_threshold : baud_cor3[i]);
2119 info->cor2 = CyETC;
2120 switch (cflag & CSIZE) {
2121 case CS5:
2122 info->cor1 = Cy_5_BITS;
2123 break;
2124 case CS6:
2125 info->cor1 = Cy_6_BITS;
2126 break;
2127 case CS7:
2128 info->cor1 = Cy_7_BITS;
2129 break;
2130 case CS8:
2131 info->cor1 = Cy_8_BITS;
2132 break;
2133 }
2134 if (cflag & CSTOPB)
2135 info->cor1 |= Cy_2_STOP;
2136
2137 if (cflag & PARENB) {
2138 if (cflag & PARODD)
2139 info->cor1 |= CyPARITY_O;
2140 else
2141 info->cor1 |= CyPARITY_E;
2142 } else
2143 info->cor1 |= CyPARITY_NONE;
2144
2145 /* CTS flow control flag */
2146 if (cflag & CRTSCTS) {
2147 info->port.flags |= ASYNC_CTS_FLOW;
2148 info->cor2 |= CyCtsAE;
2149 } else {
2150 info->port.flags &= ~ASYNC_CTS_FLOW;
2151 info->cor2 &= ~CyCtsAE;
2152 }
2153 if (cflag & CLOCAL)
2154 info->port.flags &= ~ASYNC_CHECK_CD;
2155 else
2156 info->port.flags |= ASYNC_CHECK_CD;
2157
2158 /***********************************************
2159 The hardware option, CyRtsAO, presents RTS when
2160 the chip has characters to send. Since most modems
2161 use RTS as reverse (inbound) flow control, this
2162 option is not used. If inbound flow control is
2163 necessary, DTR can be programmed to provide the
2164 appropriate signals for use with a non-standard
2165 cable. Contact Marcio Saito for details.
2166 ***********************************************/
2167
2168 channel &= 0x03;
2169
2170 spin_lock_irqsave(&card->card_lock, flags);
2171 cyy_writeb(info, CyCAR, channel);
2172
2173 /* tx and rx baud rate */
2174
2175 cyy_writeb(info, CyTCOR, info->tco);
2176 cyy_writeb(info, CyTBPR, info->tbpr);
2177 cyy_writeb(info, CyRCOR, info->rco);
2178 cyy_writeb(info, CyRBPR, info->rbpr);
2179
2180 /* set line characteristics according configuration */
2181
2182 cyy_writeb(info, CySCHR1, START_CHAR(tty));
2183 cyy_writeb(info, CySCHR2, STOP_CHAR(tty));
2184 cyy_writeb(info, CyCOR1, info->cor1);
2185 cyy_writeb(info, CyCOR2, info->cor2);
2186 cyy_writeb(info, CyCOR3, info->cor3);
2187 cyy_writeb(info, CyCOR4, info->cor4);
2188 cyy_writeb(info, CyCOR5, info->cor5);
2189
2190 cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
2191 CyCOR3ch);
2192
2193 /* !!! Is this needed? */
2194 cyy_writeb(info, CyCAR, channel);
2195 cyy_writeb(info, CyRTPR,
2196 (info->default_timeout ? info->default_timeout : 0x02));
2197 /* 10ms rx timeout */
2198
2199 cflags = CyCTS;
2200 if (!C_CLOCAL(tty))
2201 cflags |= CyDSR | CyRI | CyDCD;
2202 /* without modem intr */
2203 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyMdmCh);
2204 /* act on 1->0 modem transitions */
2205 if ((cflag & CRTSCTS) && info->rflow)
2206 cyy_writeb(info, CyMCOR1, cflags | rflow_thr[i]);
2207 else
2208 cyy_writeb(info, CyMCOR1, cflags);
2209 /* act on 0->1 modem transitions */
2210 cyy_writeb(info, CyMCOR2, cflags);
2211
2212 if (i == 0) /* baud rate is zero, turn off line */
2213 cyy_change_rts_dtr(info, 0, TIOCM_DTR);
2214 else
2215 cyy_change_rts_dtr(info, TIOCM_DTR, 0);
2216
2217 clear_bit(TTY_IO_ERROR, &tty->flags);
2218 spin_unlock_irqrestore(&card->card_lock, flags);
2219
2220 } else {
2221 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
2222 __u32 sw_flow;
2223 int retval;
2224
2225 if (!cyz_is_loaded(card))
2226 return;
2227
2228 /* baud rate */
2229 baud = tty_get_baud_rate(tty);
2230 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2231 ASYNC_SPD_CUST) {
2232 if (info->custom_divisor)
2233 baud_rate = info->baud / info->custom_divisor;
2234 else
2235 baud_rate = info->baud;
2236 } else if (baud > CYZ_MAX_SPEED) {
2237 baud = CYZ_MAX_SPEED;
2238 }
2239 cy_writel(&ch_ctrl->comm_baud, baud);
2240
2241 if (baud == 134) {
2242 /* get it right for 134.5 baud */
2243 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
2244 2;
2245 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2246 ASYNC_SPD_CUST) {
2247 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2248 baud_rate) + 2;
2249 } else if (baud) {
2250 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2251 baud) + 2;
2252 /* this needs to be propagated into the card info */
2253 } else {
2254 info->timeout = 0;
2255 }
2256
2257 /* byte size and parity */
2258 switch (cflag & CSIZE) {
2259 case CS5:
2260 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
2261 break;
2262 case CS6:
2263 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
2264 break;
2265 case CS7:
2266 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
2267 break;
2268 case CS8:
2269 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
2270 break;
2271 }
2272 if (cflag & CSTOPB) {
2273 cy_writel(&ch_ctrl->comm_data_l,
2274 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
2275 } else {
2276 cy_writel(&ch_ctrl->comm_data_l,
2277 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
2278 }
2279 if (cflag & PARENB) {
2280 if (cflag & PARODD)
2281 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
2282 else
2283 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
2284 } else
2285 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
2286
2287 /* CTS flow control flag */
2288 if (cflag & CRTSCTS) {
2289 cy_writel(&ch_ctrl->hw_flow,
2290 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
2291 } else {
2292 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
2293 ~(C_RS_CTS | C_RS_RTS));
2294 }
2295 /* As the HW flow control is done in firmware, the driver
2296 doesn't need to care about it */
2297 info->port.flags &= ~ASYNC_CTS_FLOW;
2298
2299 /* XON/XOFF/XANY flow control flags */
2300 sw_flow = 0;
2301 if (iflag & IXON) {
2302 sw_flow |= C_FL_OXX;
2303 if (iflag & IXANY)
2304 sw_flow |= C_FL_OIXANY;
2305 }
2306 cy_writel(&ch_ctrl->sw_flow, sw_flow);
2307
2308 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2309 if (retval != 0) {
2310 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
2311 "was %x\n", info->line, retval);
2312 }
2313
2314 /* CD sensitivity */
2315 if (cflag & CLOCAL)
2316 info->port.flags &= ~ASYNC_CHECK_CD;
2317 else
2318 info->port.flags |= ASYNC_CHECK_CD;
2319
2320 if (baud == 0) { /* baud rate is zero, turn off line */
2321 cy_writel(&ch_ctrl->rs_control,
2322 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
2323 #ifdef CY_DEBUG_DTR
2324 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
2325 #endif
2326 } else {
2327 cy_writel(&ch_ctrl->rs_control,
2328 readl(&ch_ctrl->rs_control) | C_RS_DTR);
2329 #ifdef CY_DEBUG_DTR
2330 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
2331 #endif
2332 }
2333
2334 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2335 if (retval != 0) {
2336 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
2337 "was %x\n", info->line, retval);
2338 }
2339
2340 clear_bit(TTY_IO_ERROR, &tty->flags);
2341 }
2342 } /* set_line_char */
2343
2344 static int cy_get_serial_info(struct cyclades_port *info,
2345 struct serial_struct __user *retinfo)
2346 {
2347 struct cyclades_card *cinfo = info->card;
2348 struct serial_struct tmp = {
2349 .type = info->type,
2350 .line = info->line,
2351 .port = (info->card - cy_card) * 0x100 + info->line -
2352 cinfo->first_line,
2353 .irq = cinfo->irq,
2354 .flags = info->port.flags,
2355 .close_delay = info->port.close_delay,
2356 .closing_wait = info->port.closing_wait,
2357 .baud_base = info->baud,
2358 .custom_divisor = info->custom_divisor,
2359 .hub6 = 0, /*!!! */
2360 };
2361 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
2362 }
2363
2364 static int
2365 cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
2366 struct serial_struct __user *new_info)
2367 {
2368 struct serial_struct new_serial;
2369
2370 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2371 return -EFAULT;
2372
2373 if (!capable(CAP_SYS_ADMIN)) {
2374 if (new_serial.close_delay != info->port.close_delay ||
2375 new_serial.baud_base != info->baud ||
2376 (new_serial.flags & ASYNC_FLAGS &
2377 ~ASYNC_USR_MASK) !=
2378 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
2379 return -EPERM;
2380 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
2381 (new_serial.flags & ASYNC_USR_MASK);
2382 info->baud = new_serial.baud_base;
2383 info->custom_divisor = new_serial.custom_divisor;
2384 goto check_and_exit;
2385 }
2386
2387 /*
2388 * OK, past this point, all the error checking has been done.
2389 * At this point, we start making changes.....
2390 */
2391
2392 info->baud = new_serial.baud_base;
2393 info->custom_divisor = new_serial.custom_divisor;
2394 info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
2395 (new_serial.flags & ASYNC_FLAGS);
2396 info->port.close_delay = new_serial.close_delay * HZ / 100;
2397 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
2398
2399 check_and_exit:
2400 if (info->port.flags & ASYNC_INITIALIZED) {
2401 cy_set_line_char(info, tty);
2402 return 0;
2403 } else {
2404 return cy_startup(info, tty);
2405 }
2406 } /* set_serial_info */
2407
2408 /*
2409 * get_lsr_info - get line status register info
2410 *
2411 * Purpose: Let user call ioctl() to get info when the UART physically
2412 * is emptied. On bus types like RS485, the transmitter must
2413 * release the bus after transmitting. This must be done when
2414 * the transmit shift register is empty, not be done when the
2415 * transmit holding register is empty. This functionality
2416 * allows an RS485 driver to be written in user space.
2417 */
2418 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
2419 {
2420 struct cyclades_card *card = info->card;
2421 unsigned int result;
2422 unsigned long flags;
2423 u8 status;
2424
2425 if (!cy_is_Z(card)) {
2426 spin_lock_irqsave(&card->card_lock, flags);
2427 status = cyy_readb(info, CySRER) & (CyTxRdy | CyTxMpty);
2428 spin_unlock_irqrestore(&card->card_lock, flags);
2429 result = (status ? 0 : TIOCSER_TEMT);
2430 } else {
2431 /* Not supported yet */
2432 return -EINVAL;
2433 }
2434 return put_user(result, (unsigned long __user *)value);
2435 }
2436
2437 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
2438 {
2439 struct cyclades_port *info = tty->driver_data;
2440 struct cyclades_card *card;
2441 int result;
2442
2443 if (serial_paranoia_check(info, tty->name, __func__))
2444 return -ENODEV;
2445
2446 card = info->card;
2447
2448 lock_kernel();
2449 if (!cy_is_Z(card)) {
2450 unsigned long flags;
2451 int channel = info->line - card->first_line;
2452 u8 status;
2453
2454 spin_lock_irqsave(&card->card_lock, flags);
2455 cyy_writeb(info, CyCAR, channel & 0x03);
2456 status = cyy_readb(info, CyMSVR1);
2457 status |= cyy_readb(info, CyMSVR2);
2458 spin_unlock_irqrestore(&card->card_lock, flags);
2459
2460 if (info->rtsdtr_inv) {
2461 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
2462 ((status & CyDTR) ? TIOCM_RTS : 0);
2463 } else {
2464 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
2465 ((status & CyDTR) ? TIOCM_DTR : 0);
2466 }
2467 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
2468 ((status & CyRI) ? TIOCM_RNG : 0) |
2469 ((status & CyDSR) ? TIOCM_DSR : 0) |
2470 ((status & CyCTS) ? TIOCM_CTS : 0);
2471 } else {
2472 u32 lstatus;
2473
2474 if (!cyz_is_loaded(card)) {
2475 result = -ENODEV;
2476 goto end;
2477 }
2478
2479 lstatus = readl(&info->u.cyz.ch_ctrl->rs_status);
2480 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
2481 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
2482 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
2483 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
2484 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
2485 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
2486 }
2487 end:
2488 unlock_kernel();
2489 return result;
2490 } /* cy_tiomget */
2491
2492 static int
2493 cy_tiocmset(struct tty_struct *tty, struct file *file,
2494 unsigned int set, unsigned int clear)
2495 {
2496 struct cyclades_port *info = tty->driver_data;
2497 struct cyclades_card *card;
2498 unsigned long flags;
2499
2500 if (serial_paranoia_check(info, tty->name, __func__))
2501 return -ENODEV;
2502
2503 card = info->card;
2504 if (!cy_is_Z(card)) {
2505 spin_lock_irqsave(&card->card_lock, flags);
2506 cyy_change_rts_dtr(info, set, clear);
2507 spin_unlock_irqrestore(&card->card_lock, flags);
2508 } else {
2509 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
2510 int retval, channel = info->line - card->first_line;
2511 u32 rs;
2512
2513 if (!cyz_is_loaded(card))
2514 return -ENODEV;
2515
2516 spin_lock_irqsave(&card->card_lock, flags);
2517 rs = readl(&ch_ctrl->rs_control);
2518 if (set & TIOCM_RTS)
2519 rs |= C_RS_RTS;
2520 if (clear & TIOCM_RTS)
2521 rs &= ~C_RS_RTS;
2522 if (set & TIOCM_DTR) {
2523 rs |= C_RS_DTR;
2524 #ifdef CY_DEBUG_DTR
2525 printk(KERN_DEBUG "cyc:set_modem_info raising Z DTR\n");
2526 #endif
2527 }
2528 if (clear & TIOCM_DTR) {
2529 rs &= ~C_RS_DTR;
2530 #ifdef CY_DEBUG_DTR
2531 printk(KERN_DEBUG "cyc:set_modem_info clearing "
2532 "Z DTR\n");
2533 #endif
2534 }
2535 cy_writel(&ch_ctrl->rs_control, rs);
2536 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2537 spin_unlock_irqrestore(&card->card_lock, flags);
2538 if (retval != 0) {
2539 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
2540 "was %x\n", info->line, retval);
2541 }
2542 }
2543 return 0;
2544 }
2545
2546 /*
2547 * cy_break() --- routine which turns the break handling on or off
2548 */
2549 static int cy_break(struct tty_struct *tty, int break_state)
2550 {
2551 struct cyclades_port *info = tty->driver_data;
2552 struct cyclades_card *card;
2553 unsigned long flags;
2554 int retval = 0;
2555
2556 if (serial_paranoia_check(info, tty->name, "cy_break"))
2557 return -EINVAL;
2558
2559 card = info->card;
2560
2561 spin_lock_irqsave(&card->card_lock, flags);
2562 if (!cy_is_Z(card)) {
2563 /* Let the transmit ISR take care of this (since it
2564 requires stuffing characters into the output stream).
2565 */
2566 if (break_state == -1) {
2567 if (!info->breakon) {
2568 info->breakon = 1;
2569 if (!info->xmit_cnt) {
2570 spin_unlock_irqrestore(&card->card_lock, flags);
2571 start_xmit(info);
2572 spin_lock_irqsave(&card->card_lock, flags);
2573 }
2574 }
2575 } else {
2576 if (!info->breakoff) {
2577 info->breakoff = 1;
2578 if (!info->xmit_cnt) {
2579 spin_unlock_irqrestore(&card->card_lock, flags);
2580 start_xmit(info);
2581 spin_lock_irqsave(&card->card_lock, flags);
2582 }
2583 }
2584 }
2585 } else {
2586 if (break_state == -1) {
2587 retval = cyz_issue_cmd(card,
2588 info->line - card->first_line,
2589 C_CM_SET_BREAK, 0L);
2590 if (retval != 0) {
2591 printk(KERN_ERR "cyc:cy_break (set) retval on "
2592 "ttyC%d was %x\n", info->line, retval);
2593 }
2594 } else {
2595 retval = cyz_issue_cmd(card,
2596 info->line - card->first_line,
2597 C_CM_CLR_BREAK, 0L);
2598 if (retval != 0) {
2599 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
2600 "on ttyC%d was %x\n", info->line,
2601 retval);
2602 }
2603 }
2604 }
2605 spin_unlock_irqrestore(&card->card_lock, flags);
2606 return retval;
2607 } /* cy_break */
2608
2609 static int set_threshold(struct cyclades_port *info, unsigned long value)
2610 {
2611 struct cyclades_card *card = info->card;
2612 unsigned long flags;
2613
2614 if (!cy_is_Z(card)) {
2615 info->cor3 &= ~CyREC_FIFO;
2616 info->cor3 |= value & CyREC_FIFO;
2617
2618 spin_lock_irqsave(&card->card_lock, flags);
2619 cyy_writeb(info, CyCOR3, info->cor3);
2620 cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR3ch);
2621 spin_unlock_irqrestore(&card->card_lock, flags);
2622 }
2623 return 0;
2624 } /* set_threshold */
2625
2626 static int get_threshold(struct cyclades_port *info,
2627 unsigned long __user *value)
2628 {
2629 struct cyclades_card *card = info->card;
2630
2631 if (!cy_is_Z(card)) {
2632 u8 tmp = cyy_readb(info, CyCOR3) & CyREC_FIFO;
2633 return put_user(tmp, value);
2634 }
2635 return 0;
2636 } /* get_threshold */
2637
2638 static int set_timeout(struct cyclades_port *info, unsigned long value)
2639 {
2640 struct cyclades_card *card = info->card;
2641 unsigned long flags;
2642
2643 if (!cy_is_Z(card)) {
2644 spin_lock_irqsave(&card->card_lock, flags);
2645 cyy_writeb(info, CyRTPR, value & 0xff);
2646 spin_unlock_irqrestore(&card->card_lock, flags);
2647 }
2648 return 0;
2649 } /* set_timeout */
2650
2651 static int get_timeout(struct cyclades_port *info,
2652 unsigned long __user *value)
2653 {
2654 struct cyclades_card *card = info->card;
2655
2656 if (!cy_is_Z(card)) {
2657 u8 tmp = cyy_readb(info, CyRTPR);
2658 return put_user(tmp, value);
2659 }
2660 return 0;
2661 } /* get_timeout */
2662
2663 static int cy_cflags_changed(struct cyclades_port *info, unsigned long arg,
2664 struct cyclades_icount *cprev)
2665 {
2666 struct cyclades_icount cnow;
2667 unsigned long flags;
2668 int ret;
2669
2670 spin_lock_irqsave(&info->card->card_lock, flags);
2671 cnow = info->icount; /* atomic copy */
2672 spin_unlock_irqrestore(&info->card->card_lock, flags);
2673
2674 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
2675 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
2676 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
2677 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
2678
2679 *cprev = cnow;
2680
2681 return ret;
2682 }
2683
2684 /*
2685 * This routine allows the tty driver to implement device-
2686 * specific ioctl's. If the ioctl number passed in cmd is
2687 * not recognized by the driver, it should return ENOIOCTLCMD.
2688 */
2689 static int
2690 cy_ioctl(struct tty_struct *tty, struct file *file,
2691 unsigned int cmd, unsigned long arg)
2692 {
2693 struct cyclades_port *info = tty->driver_data;
2694 struct cyclades_icount cnow; /* kernel counter temps */
2695 int ret_val = 0;
2696 unsigned long flags;
2697 void __user *argp = (void __user *)arg;
2698
2699 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
2700 return -ENODEV;
2701
2702 #ifdef CY_DEBUG_OTHER
2703 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
2704 info->line, cmd, arg);
2705 #endif
2706 lock_kernel();
2707
2708 switch (cmd) {
2709 case CYGETMON:
2710 if (copy_to_user(argp, &info->mon, sizeof(info->mon))) {
2711 ret_val = -EFAULT;
2712 break;
2713 }
2714 memset(&info->mon, 0, sizeof(info->mon));
2715 break;
2716 case CYGETTHRESH:
2717 ret_val = get_threshold(info, argp);
2718 break;
2719 case CYSETTHRESH:
2720 ret_val = set_threshold(info, arg);
2721 break;
2722 case CYGETDEFTHRESH:
2723 ret_val = put_user(info->default_threshold,
2724 (unsigned long __user *)argp);
2725 break;
2726 case CYSETDEFTHRESH:
2727 info->default_threshold = arg & 0x0f;
2728 break;
2729 case CYGETTIMEOUT:
2730 ret_val = get_timeout(info, argp);
2731 break;
2732 case CYSETTIMEOUT:
2733 ret_val = set_timeout(info, arg);
2734 break;
2735 case CYGETDEFTIMEOUT:
2736 ret_val = put_user(info->default_timeout,
2737 (unsigned long __user *)argp);
2738 break;
2739 case CYSETDEFTIMEOUT:
2740 info->default_timeout = arg & 0xff;
2741 break;
2742 case CYSETRFLOW:
2743 info->rflow = (int)arg;
2744 break;
2745 case CYGETRFLOW:
2746 ret_val = info->rflow;
2747 break;
2748 case CYSETRTSDTR_INV:
2749 info->rtsdtr_inv = (int)arg;
2750 break;
2751 case CYGETRTSDTR_INV:
2752 ret_val = info->rtsdtr_inv;
2753 break;
2754 case CYGETCD1400VER:
2755 ret_val = info->chip_rev;
2756 break;
2757 #ifndef CONFIG_CYZ_INTR
2758 case CYZSETPOLLCYCLE:
2759 cyz_polling_cycle = (arg * HZ) / 1000;
2760 break;
2761 case CYZGETPOLLCYCLE:
2762 ret_val = (cyz_polling_cycle * 1000) / HZ;
2763 break;
2764 #endif /* CONFIG_CYZ_INTR */
2765 case CYSETWAIT:
2766 info->port.closing_wait = (unsigned short)arg * HZ / 100;
2767 break;
2768 case CYGETWAIT:
2769 ret_val = info->port.closing_wait / (HZ / 100);
2770 break;
2771 case TIOCGSERIAL:
2772 ret_val = cy_get_serial_info(info, argp);
2773 break;
2774 case TIOCSSERIAL:
2775 ret_val = cy_set_serial_info(info, tty, argp);
2776 break;
2777 case TIOCSERGETLSR: /* Get line status register */
2778 ret_val = get_lsr_info(info, argp);
2779 break;
2780 /*
2781 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
2782 * - mask passed in arg for lines of interest
2783 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
2784 * Caller should use TIOCGICOUNT to see which one it was
2785 */
2786 case TIOCMIWAIT:
2787 spin_lock_irqsave(&info->card->card_lock, flags);
2788 /* note the counters on entry */
2789 cnow = info->icount;
2790 spin_unlock_irqrestore(&info->card->card_lock, flags);
2791 ret_val = wait_event_interruptible(info->port.delta_msr_wait,
2792 cy_cflags_changed(info, arg, &cnow));
2793 break;
2794
2795 /*
2796 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
2797 * Return: write counters to the user passed counter struct
2798 * NB: both 1->0 and 0->1 transitions are counted except for
2799 * RI where only 0->1 is counted.
2800 */
2801 case TIOCGICOUNT: {
2802 struct serial_icounter_struct sic = { };
2803
2804 spin_lock_irqsave(&info->card->card_lock, flags);
2805 cnow = info->icount;
2806 spin_unlock_irqrestore(&info->card->card_lock, flags);
2807
2808 sic.cts = cnow.cts;
2809 sic.dsr = cnow.dsr;
2810 sic.rng = cnow.rng;
2811 sic.dcd = cnow.dcd;
2812 sic.rx = cnow.rx;
2813 sic.tx = cnow.tx;
2814 sic.frame = cnow.frame;
2815 sic.overrun = cnow.overrun;
2816 sic.parity = cnow.parity;
2817 sic.brk = cnow.brk;
2818 sic.buf_overrun = cnow.buf_overrun;
2819
2820 if (copy_to_user(argp, &sic, sizeof(sic)))
2821 ret_val = -EFAULT;
2822 break;
2823 }
2824 default:
2825 ret_val = -ENOIOCTLCMD;
2826 }
2827 unlock_kernel();
2828
2829 #ifdef CY_DEBUG_OTHER
2830 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
2831 #endif
2832 return ret_val;
2833 } /* cy_ioctl */
2834
2835 /*
2836 * This routine allows the tty driver to be notified when
2837 * device's termios settings have changed. Note that a
2838 * well-designed tty driver should be prepared to accept the case
2839 * where old == NULL, and try to do something rational.
2840 */
2841 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
2842 {
2843 struct cyclades_port *info = tty->driver_data;
2844
2845 #ifdef CY_DEBUG_OTHER
2846 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
2847 #endif
2848
2849 cy_set_line_char(info, tty);
2850
2851 if ((old_termios->c_cflag & CRTSCTS) &&
2852 !(tty->termios->c_cflag & CRTSCTS)) {
2853 tty->hw_stopped = 0;
2854 cy_start(tty);
2855 }
2856 #if 0
2857 /*
2858 * No need to wake up processes in open wait, since they
2859 * sample the CLOCAL flag once, and don't recheck it.
2860 * XXX It's not clear whether the current behavior is correct
2861 * or not. Hence, this may change.....
2862 */
2863 if (!(old_termios->c_cflag & CLOCAL) &&
2864 (tty->termios->c_cflag & CLOCAL))
2865 wake_up_interruptible(&info->port.open_wait);
2866 #endif
2867 } /* cy_set_termios */
2868
2869 /* This function is used to send a high-priority XON/XOFF character to
2870 the device.
2871 */
2872 static void cy_send_xchar(struct tty_struct *tty, char ch)
2873 {
2874 struct cyclades_port *info = tty->driver_data;
2875 struct cyclades_card *card;
2876 int channel;
2877
2878 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
2879 return;
2880
2881 info->x_char = ch;
2882
2883 if (ch)
2884 cy_start(tty);
2885
2886 card = info->card;
2887 channel = info->line - card->first_line;
2888
2889 if (cy_is_Z(card)) {
2890 if (ch == STOP_CHAR(tty))
2891 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
2892 else if (ch == START_CHAR(tty))
2893 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
2894 }
2895 }
2896
2897 /* This routine is called by the upper-layer tty layer to signal
2898 that incoming characters should be throttled because the input
2899 buffers are close to full.
2900 */
2901 static void cy_throttle(struct tty_struct *tty)
2902 {
2903 struct cyclades_port *info = tty->driver_data;
2904 struct cyclades_card *card;
2905 unsigned long flags;
2906
2907 #ifdef CY_DEBUG_THROTTLE
2908 char buf[64];
2909
2910 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
2911 tty->ldisc.chars_in_buffer(tty), info->line);
2912 #endif
2913
2914 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
2915 return;
2916
2917 card = info->card;
2918
2919 if (I_IXOFF(tty)) {
2920 if (!cy_is_Z(card))
2921 cy_send_xchar(tty, STOP_CHAR(tty));
2922 else
2923 info->throttle = 1;
2924 }
2925
2926 if (tty->termios->c_cflag & CRTSCTS) {
2927 if (!cy_is_Z(card)) {
2928 spin_lock_irqsave(&card->card_lock, flags);
2929 cyy_change_rts_dtr(info, 0, TIOCM_RTS);
2930 spin_unlock_irqrestore(&card->card_lock, flags);
2931 } else {
2932 info->throttle = 1;
2933 }
2934 }
2935 } /* cy_throttle */
2936
2937 /*
2938 * This routine notifies the tty driver that it should signal
2939 * that characters can now be sent to the tty without fear of
2940 * overrunning the input buffers of the line disciplines.
2941 */
2942 static void cy_unthrottle(struct tty_struct *tty)
2943 {
2944 struct cyclades_port *info = tty->driver_data;
2945 struct cyclades_card *card;
2946 unsigned long flags;
2947
2948 #ifdef CY_DEBUG_THROTTLE
2949 char buf[64];
2950
2951 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
2952 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
2953 #endif
2954
2955 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
2956 return;
2957
2958 if (I_IXOFF(tty)) {
2959 if (info->x_char)
2960 info->x_char = 0;
2961 else
2962 cy_send_xchar(tty, START_CHAR(tty));
2963 }
2964
2965 if (tty->termios->c_cflag & CRTSCTS) {
2966 card = info->card;
2967 if (!cy_is_Z(card)) {
2968 spin_lock_irqsave(&card->card_lock, flags);
2969 cyy_change_rts_dtr(info, TIOCM_RTS, 0);
2970 spin_unlock_irqrestore(&card->card_lock, flags);
2971 } else {
2972 info->throttle = 0;
2973 }
2974 }
2975 } /* cy_unthrottle */
2976
2977 /* cy_start and cy_stop provide software output flow control as a
2978 function of XON/XOFF, software CTS, and other such stuff.
2979 */
2980 static void cy_stop(struct tty_struct *tty)
2981 {
2982 struct cyclades_card *cinfo;
2983 struct cyclades_port *info = tty->driver_data;
2984 int channel;
2985 unsigned long flags;
2986
2987 #ifdef CY_DEBUG_OTHER
2988 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
2989 #endif
2990
2991 if (serial_paranoia_check(info, tty->name, "cy_stop"))
2992 return;
2993
2994 cinfo = info->card;
2995 channel = info->line - cinfo->first_line;
2996 if (!cy_is_Z(cinfo)) {
2997 spin_lock_irqsave(&cinfo->card_lock, flags);
2998 cyy_writeb(info, CyCAR, channel & 0x03);
2999 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
3000 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3001 }
3002 } /* cy_stop */
3003
3004 static void cy_start(struct tty_struct *tty)
3005 {
3006 struct cyclades_card *cinfo;
3007 struct cyclades_port *info = tty->driver_data;
3008 int channel;
3009 unsigned long flags;
3010
3011 #ifdef CY_DEBUG_OTHER
3012 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
3013 #endif
3014
3015 if (serial_paranoia_check(info, tty->name, "cy_start"))
3016 return;
3017
3018 cinfo = info->card;
3019 channel = info->line - cinfo->first_line;
3020 if (!cy_is_Z(cinfo)) {
3021 spin_lock_irqsave(&cinfo->card_lock, flags);
3022 cyy_writeb(info, CyCAR, channel & 0x03);
3023 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
3024 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3025 }
3026 } /* cy_start */
3027
3028 /*
3029 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
3030 */
3031 static void cy_hangup(struct tty_struct *tty)
3032 {
3033 struct cyclades_port *info = tty->driver_data;
3034
3035 #ifdef CY_DEBUG_OTHER
3036 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
3037 #endif
3038
3039 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
3040 return;
3041
3042 cy_flush_buffer(tty);
3043 cy_shutdown(info, tty);
3044 tty_port_hangup(&info->port);
3045 } /* cy_hangup */
3046
3047 static int cyy_carrier_raised(struct tty_port *port)
3048 {
3049 struct cyclades_port *info = container_of(port, struct cyclades_port,
3050 port);
3051 struct cyclades_card *cinfo = info->card;
3052 unsigned long flags;
3053 int channel = info->line - cinfo->first_line;
3054 u32 cd;
3055
3056 spin_lock_irqsave(&cinfo->card_lock, flags);
3057 cyy_writeb(info, CyCAR, channel & 0x03);
3058 cd = cyy_readb(info, CyMSVR1) & CyDCD;
3059 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3060
3061 return cd;
3062 }
3063
3064 static void cyy_dtr_rts(struct tty_port *port, int raise)
3065 {
3066 struct cyclades_port *info = container_of(port, struct cyclades_port,
3067 port);
3068 struct cyclades_card *cinfo = info->card;
3069 unsigned long flags;
3070
3071 spin_lock_irqsave(&cinfo->card_lock, flags);
3072 cyy_change_rts_dtr(info, raise ? TIOCM_RTS | TIOCM_DTR : 0,
3073 raise ? 0 : TIOCM_RTS | TIOCM_DTR);
3074 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3075 }
3076
3077 static int cyz_carrier_raised(struct tty_port *port)
3078 {
3079 struct cyclades_port *info = container_of(port, struct cyclades_port,
3080 port);
3081
3082 return readl(&info->u.cyz.ch_ctrl->rs_status) & C_RS_DCD;
3083 }
3084
3085 static void cyz_dtr_rts(struct tty_port *port, int raise)
3086 {
3087 struct cyclades_port *info = container_of(port, struct cyclades_port,
3088 port);
3089 struct cyclades_card *cinfo = info->card;
3090 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
3091 int ret, channel = info->line - cinfo->first_line;
3092 u32 rs;
3093
3094 rs = readl(&ch_ctrl->rs_control);
3095 if (raise)
3096 rs |= C_RS_RTS | C_RS_DTR;
3097 else
3098 rs &= ~(C_RS_RTS | C_RS_DTR);
3099 cy_writel(&ch_ctrl->rs_control, rs);
3100 ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L);
3101 if (ret != 0)
3102 printk(KERN_ERR "%s: retval on ttyC%d was %x\n",
3103 __func__, info->line, ret);
3104 #ifdef CY_DEBUG_DTR
3105 printk(KERN_DEBUG "%s: raising Z DTR\n", __func__);
3106 #endif
3107 }
3108
3109 static const struct tty_port_operations cyy_port_ops = {
3110 .carrier_raised = cyy_carrier_raised,
3111 .dtr_rts = cyy_dtr_rts,
3112 .shutdown = cy_do_close,
3113 };
3114
3115 static const struct tty_port_operations cyz_port_ops = {
3116 .carrier_raised = cyz_carrier_raised,
3117 .dtr_rts = cyz_dtr_rts,
3118 .shutdown = cy_do_close,
3119 };
3120
3121 /*
3122 * ---------------------------------------------------------------------
3123 * cy_init() and friends
3124 *
3125 * cy_init() is called at boot-time to initialize the serial driver.
3126 * ---------------------------------------------------------------------
3127 */
3128
3129 static int __devinit cy_init_card(struct cyclades_card *cinfo)
3130 {
3131 struct cyclades_port *info;
3132 unsigned int channel, port;
3133
3134 spin_lock_init(&cinfo->card_lock);
3135 cinfo->intr_enabled = 0;
3136
3137 cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
3138 GFP_KERNEL);
3139 if (cinfo->ports == NULL) {
3140 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
3141 return -ENOMEM;
3142 }
3143
3144 for (channel = 0, port = cinfo->first_line; channel < cinfo->nports;
3145 channel++, port++) {
3146 info = &cinfo->ports[channel];
3147 tty_port_init(&info->port);
3148 info->magic = CYCLADES_MAGIC;
3149 info->card = cinfo;
3150 info->line = port;
3151
3152 info->port.closing_wait = CLOSING_WAIT_DELAY;
3153 info->port.close_delay = 5 * HZ / 10;
3154 info->port.flags = STD_COM_FLAGS;
3155 init_completion(&info->shutdown_wait);
3156
3157 if (cy_is_Z(cinfo)) {
3158 struct FIRM_ID *firm_id = cinfo->base_addr + ID_ADDRESS;
3159 struct ZFW_CTRL *zfw_ctrl;
3160
3161 info->port.ops = &cyz_port_ops;
3162 info->type = PORT_STARTECH;
3163
3164 zfw_ctrl = cinfo->base_addr +
3165 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3166 info->u.cyz.ch_ctrl = &zfw_ctrl->ch_ctrl[channel];
3167 info->u.cyz.buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3168
3169 if (cinfo->hw_ver == ZO_V1)
3170 info->xmit_fifo_size = CYZ_FIFO_SIZE;
3171 else
3172 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
3173 #ifdef CONFIG_CYZ_INTR
3174 setup_timer(&cyz_rx_full_timer[port],
3175 cyz_rx_restart, (unsigned long)info);
3176 #endif
3177 } else {
3178 unsigned short chip_number;
3179 int index = cinfo->bus_index;
3180
3181 info->port.ops = &cyy_port_ops;
3182 info->type = PORT_CIRRUS;
3183 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
3184 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
3185 info->cor2 = CyETC;
3186 info->cor3 = 0x08; /* _very_ small rcv threshold */
3187
3188 chip_number = channel / CyPORTS_PER_CHIP;
3189 info->u.cyy.base_addr = cinfo->base_addr +
3190 (cy_chip_offset[chip_number] << index);
3191 info->chip_rev = cyy_readb(info, CyGFRCR);
3192
3193 if (info->chip_rev >= CD1400_REV_J) {
3194 /* It is a CD1400 rev. J or later */
3195 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
3196 info->tco = baud_co_60[13]; /* Tx CO */
3197 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
3198 info->rco = baud_co_60[13]; /* Rx CO */
3199 info->rtsdtr_inv = 1;
3200 } else {
3201 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
3202 info->tco = baud_co_25[13]; /* Tx CO */
3203 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
3204 info->rco = baud_co_25[13]; /* Rx CO */
3205 info->rtsdtr_inv = 0;
3206 }
3207 info->read_status_mask = CyTIMEOUT | CySPECHAR |
3208 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
3209 }
3210
3211 }
3212
3213 #ifndef CONFIG_CYZ_INTR
3214 if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
3215 mod_timer(&cyz_timerlist, jiffies + 1);
3216 #ifdef CY_PCI_DEBUG
3217 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
3218 #endif
3219 }
3220 #endif
3221 return 0;
3222 }
3223
3224 /* initialize chips on Cyclom-Y card -- return number of valid
3225 chips (which is number of ports/4) */
3226 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
3227 int index)
3228 {
3229 unsigned int chip_number;
3230 void __iomem *base_addr;
3231
3232 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
3233 /* Cy_HwReset is 0x1400 */
3234 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
3235 /* Cy_ClrIntr is 0x1800 */
3236 udelay(500L);
3237
3238 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
3239 chip_number++) {
3240 base_addr =
3241 true_base_addr + (cy_chip_offset[chip_number] << index);
3242 mdelay(1);
3243 if (readb(base_addr + (CyCCR << index)) != 0x00) {
3244 /*************
3245 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
3246 chip_number, (unsigned long)base_addr);
3247 *************/
3248 return chip_number;
3249 }
3250
3251 cy_writeb(base_addr + (CyGFRCR << index), 0);
3252 udelay(10L);
3253
3254 /* The Cyclom-16Y does not decode address bit 9 and therefore
3255 cannot distinguish between references to chip 0 and a non-
3256 existent chip 4. If the preceding clearing of the supposed
3257 chip 4 GFRCR register appears at chip 0, there is no chip 4
3258 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
3259 */
3260 if (chip_number == 4 && readb(true_base_addr +
3261 (cy_chip_offset[0] << index) +
3262 (CyGFRCR << index)) == 0) {
3263 return chip_number;
3264 }
3265
3266 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
3267 mdelay(1);
3268
3269 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
3270 /*
3271 printk(" chip #%d at %#6lx is not responding ",
3272 chip_number, (unsigned long)base_addr);
3273 printk("(GFRCR stayed 0)\n",
3274 */
3275 return chip_number;
3276 }
3277 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
3278 0x40) {
3279 /*
3280 printk(" chip #%d at %#6lx is not valid (GFRCR == "
3281 "%#2x)\n",
3282 chip_number, (unsigned long)base_addr,
3283 base_addr[CyGFRCR<<index]);
3284 */
3285 return chip_number;
3286 }
3287 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
3288 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
3289 /* It is a CD1400 rev. J or later */
3290 /* Impossible to reach 5ms with this chip.
3291 Changed to 2ms instead (f = 500 Hz). */
3292 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
3293 } else {
3294 /* f = 200 Hz */
3295 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
3296 }
3297
3298 /*
3299 printk(" chip #%d at %#6lx is rev 0x%2x\n",
3300 chip_number, (unsigned long)base_addr,
3301 readb(base_addr+(CyGFRCR<<index)));
3302 */
3303 }
3304 return chip_number;
3305 } /* cyy_init_card */
3306
3307 /*
3308 * ---------------------------------------------------------------------
3309 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
3310 * sets global variables and return the number of ISA boards found.
3311 * ---------------------------------------------------------------------
3312 */
3313 static int __init cy_detect_isa(void)
3314 {
3315 #ifdef CONFIG_ISA
3316 unsigned short cy_isa_irq, nboard;
3317 void __iomem *cy_isa_address;
3318 unsigned short i, j, cy_isa_nchan;
3319 #ifdef MODULE
3320 int isparam = 0;
3321 #endif
3322
3323 nboard = 0;
3324
3325 #ifdef MODULE
3326 /* Check for module parameters */
3327 for (i = 0; i < NR_CARDS; i++) {
3328 if (maddr[i] || i) {
3329 isparam = 1;
3330 cy_isa_addresses[i] = maddr[i];
3331 }
3332 if (!maddr[i])
3333 break;
3334 }
3335 #endif
3336
3337 /* scan the address table probing for Cyclom-Y/ISA boards */
3338 for (i = 0; i < NR_ISA_ADDRS; i++) {
3339 unsigned int isa_address = cy_isa_addresses[i];
3340 if (isa_address == 0x0000)
3341 return nboard;
3342
3343 /* probe for CD1400... */
3344 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
3345 if (cy_isa_address == NULL) {
3346 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
3347 "address\n");
3348 continue;
3349 }
3350 cy_isa_nchan = CyPORTS_PER_CHIP *
3351 cyy_init_card(cy_isa_address, 0);
3352 if (cy_isa_nchan == 0) {
3353 iounmap(cy_isa_address);
3354 continue;
3355 }
3356 #ifdef MODULE
3357 if (isparam && i < NR_CARDS && irq[i])
3358 cy_isa_irq = irq[i];
3359 else
3360 #endif
3361 /* find out the board's irq by probing */
3362 cy_isa_irq = detect_isa_irq(cy_isa_address);
3363 if (cy_isa_irq == 0) {
3364 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
3365 "IRQ could not be detected.\n",
3366 (unsigned long)cy_isa_address);
3367 iounmap(cy_isa_address);
3368 continue;
3369 }
3370
3371 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
3372 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
3373 "more channels are available. Change NR_PORTS "
3374 "in cyclades.c and recompile kernel.\n",
3375 (unsigned long)cy_isa_address);
3376 iounmap(cy_isa_address);
3377 return nboard;
3378 }
3379 /* fill the next cy_card structure available */
3380 for (j = 0; j < NR_CARDS; j++) {
3381 if (cy_card[j].base_addr == NULL)
3382 break;
3383 }
3384 if (j == NR_CARDS) { /* no more cy_cards available */
3385 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
3386 "more cards can be used. Change NR_CARDS in "
3387 "cyclades.c and recompile kernel.\n",
3388 (unsigned long)cy_isa_address);
3389 iounmap(cy_isa_address);
3390 return nboard;
3391 }
3392
3393 /* allocate IRQ */
3394 if (request_irq(cy_isa_irq, cyy_interrupt,
3395 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
3396 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
3397 "could not allocate IRQ#%d.\n",
3398 (unsigned long)cy_isa_address, cy_isa_irq);
3399 iounmap(cy_isa_address);
3400 return nboard;
3401 }
3402
3403 /* set cy_card */
3404 cy_card[j].base_addr = cy_isa_address;
3405 cy_card[j].ctl_addr.p9050 = NULL;
3406 cy_card[j].irq = (int)cy_isa_irq;
3407 cy_card[j].bus_index = 0;
3408 cy_card[j].first_line = cy_next_channel;
3409 cy_card[j].num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
3410 cy_card[j].nports = cy_isa_nchan;
3411 if (cy_init_card(&cy_card[j])) {
3412 cy_card[j].base_addr = NULL;
3413 free_irq(cy_isa_irq, &cy_card[j]);
3414 iounmap(cy_isa_address);
3415 continue;
3416 }
3417 nboard++;
3418
3419 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
3420 "%d channels starting from port %d\n",
3421 j + 1, (unsigned long)cy_isa_address,
3422 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
3423 cy_isa_irq, cy_isa_nchan, cy_next_channel);
3424
3425 for (j = cy_next_channel;
3426 j < cy_next_channel + cy_isa_nchan; j++)
3427 tty_register_device(cy_serial_driver, j, NULL);
3428 cy_next_channel += cy_isa_nchan;
3429 }
3430 return nboard;
3431 #else
3432 return 0;
3433 #endif /* CONFIG_ISA */
3434 } /* cy_detect_isa */
3435
3436 #ifdef CONFIG_PCI
3437 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
3438 {
3439 unsigned int a;
3440
3441 for (a = 0; a < size && *str; a++, str++)
3442 if (*str & 0x80)
3443 return -EINVAL;
3444
3445 for (; a < size; a++, str++)
3446 if (*str)
3447 return -EINVAL;
3448
3449 return 0;
3450 }
3451
3452 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
3453 unsigned int size)
3454 {
3455 for (; size > 0; size--) {
3456 cy_writel(fpga, *data++);
3457 udelay(10);
3458 }
3459 }
3460
3461 static void __devinit plx_init(struct pci_dev *pdev, int irq,
3462 struct RUNTIME_9060 __iomem *addr)
3463 {
3464 /* Reset PLX */
3465 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
3466 udelay(100L);
3467 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
3468
3469 /* Reload Config. Registers from EEPROM */
3470 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
3471 udelay(100L);
3472 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
3473
3474 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
3475 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
3476 * registers. This will remain here until we find a permanent fix.
3477 */
3478 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
3479 }
3480
3481 static int __devinit __cyz_load_fw(const struct firmware *fw,
3482 const char *name, const u32 mailbox, void __iomem *base,
3483 void __iomem *fpga)
3484 {
3485 const void *ptr = fw->data;
3486 const struct zfile_header *h = ptr;
3487 const struct zfile_config *c, *cs;
3488 const struct zfile_block *b, *bs;
3489 unsigned int a, tmp, len = fw->size;
3490 #define BAD_FW KERN_ERR "Bad firmware: "
3491 if (len < sizeof(*h)) {
3492 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
3493 return -EINVAL;
3494 }
3495
3496 cs = ptr + h->config_offset;
3497 bs = ptr + h->block_offset;
3498
3499 if ((void *)(cs + h->n_config) > ptr + len ||
3500 (void *)(bs + h->n_blocks) > ptr + len) {
3501 printk(BAD_FW "too short");
3502 return -EINVAL;
3503 }
3504
3505 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
3506 cyc_isfwstr(h->date, sizeof(h->date))) {
3507 printk(BAD_FW "bad formatted header string\n");
3508 return -EINVAL;
3509 }
3510
3511 if (strncmp(name, h->name, sizeof(h->name))) {
3512 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
3513 return -EINVAL;
3514 }
3515
3516 tmp = 0;
3517 for (c = cs; c < cs + h->n_config; c++) {
3518 for (a = 0; a < c->n_blocks; a++)
3519 if (c->block_list[a] > h->n_blocks) {
3520 printk(BAD_FW "bad block ref number in cfgs\n");
3521 return -EINVAL;
3522 }
3523 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
3524 tmp++;
3525 }
3526 if (!tmp) {
3527 printk(BAD_FW "nothing appropriate\n");
3528 return -EINVAL;
3529 }
3530
3531 for (b = bs; b < bs + h->n_blocks; b++)
3532 if (b->file_offset + b->size > len) {
3533 printk(BAD_FW "bad block data offset\n");
3534 return -EINVAL;
3535 }
3536
3537 /* everything is OK, let's seek'n'load it */
3538 for (c = cs; c < cs + h->n_config; c++)
3539 if (c->mailbox == mailbox && c->function == 0)
3540 break;
3541
3542 for (a = 0; a < c->n_blocks; a++) {
3543 b = &bs[c->block_list[a]];
3544 if (b->type == ZBLOCK_FPGA) {
3545 if (fpga != NULL)
3546 cyz_fpga_copy(fpga, ptr + b->file_offset,
3547 b->size);
3548 } else {
3549 if (base != NULL)
3550 memcpy_toio(base + b->ram_offset,
3551 ptr + b->file_offset, b->size);
3552 }
3553 }
3554 #undef BAD_FW
3555 return 0;
3556 }
3557
3558 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
3559 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
3560 {
3561 const struct firmware *fw;
3562 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
3563 struct CUSTOM_REG __iomem *cust = base_addr;
3564 struct ZFW_CTRL __iomem *pt_zfwctrl;
3565 void __iomem *tmp;
3566 u32 mailbox, status, nchan;
3567 unsigned int i;
3568 int retval;
3569
3570 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
3571 if (retval) {
3572 dev_err(&pdev->dev, "can't get firmware\n");
3573 goto err;
3574 }
3575
3576 /* Check whether the firmware is already loaded and running. If
3577 positive, skip this board */
3578 if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
3579 u32 cntval = readl(base_addr + 0x190);
3580
3581 udelay(100);
3582 if (cntval != readl(base_addr + 0x190)) {
3583 /* FW counter is working, FW is running */
3584 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
3585 "Skipping board.\n");
3586 retval = 0;
3587 goto err_rel;
3588 }
3589 }
3590
3591 /* start boot */
3592 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
3593 ~0x00030800UL);
3594
3595 mailbox = readl(&ctl_addr->mail_box_0);
3596
3597 if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
3598 /* stops CPU and set window to beginning of RAM */
3599 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3600 cy_writel(&cust->cpu_stop, 0);
3601 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3602 udelay(100);
3603 }
3604
3605 plx_init(pdev, irq, ctl_addr);
3606
3607 if (mailbox != 0) {
3608 /* load FPGA */
3609 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
3610 base_addr);
3611 if (retval)
3612 goto err_rel;
3613 if (!__cyz_fpga_loaded(ctl_addr)) {
3614 dev_err(&pdev->dev, "fw upload successful, but fw is "
3615 "not loaded\n");
3616 goto err_rel;
3617 }
3618 }
3619
3620 /* stops CPU and set window to beginning of RAM */
3621 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3622 cy_writel(&cust->cpu_stop, 0);
3623 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3624 udelay(100);
3625
3626 /* clear memory */
3627 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
3628 cy_writeb(tmp, 255);
3629 if (mailbox != 0) {
3630 /* set window to last 512K of RAM */
3631 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
3632 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
3633 cy_writeb(tmp, 255);
3634 /* set window to beginning of RAM */
3635 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3636 }
3637
3638 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
3639 release_firmware(fw);
3640 if (retval)
3641 goto err;
3642
3643 /* finish boot and start boards */
3644 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3645 cy_writel(&cust->cpu_start, 0);
3646 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3647 i = 0;
3648 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
3649 msleep(100);
3650 if (status != ZFIRM_ID) {
3651 if (status == ZFIRM_HLT) {
3652 dev_err(&pdev->dev, "you need an external power supply "
3653 "for this number of ports. Firmware halted and "
3654 "board reset.\n");
3655 retval = -EIO;
3656 goto err;
3657 }
3658 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
3659 "some more time\n", status);
3660 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
3661 i++ < 200)
3662 msleep(100);
3663 if (status != ZFIRM_ID) {
3664 dev_err(&pdev->dev, "Board not started in 20 seconds! "
3665 "Giving up. (fid->signature = 0x%x)\n",
3666 status);
3667 dev_info(&pdev->dev, "*** Warning ***: if you are "
3668 "upgrading the FW, please power cycle the "
3669 "system before loading the new FW to the "
3670 "Cyclades-Z.\n");
3671
3672 if (__cyz_fpga_loaded(ctl_addr))
3673 plx_init(pdev, irq, ctl_addr);
3674
3675 retval = -EIO;
3676 goto err;
3677 }
3678 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
3679 i / 10);
3680 }
3681 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
3682
3683 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
3684 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
3685 base_addr + readl(&fid->zfwctrl_addr));
3686
3687 nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
3688 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
3689 readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
3690
3691 if (nchan == 0) {
3692 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
3693 "check the connection between the Z host card and the "
3694 "serial expanders.\n");
3695
3696 if (__cyz_fpga_loaded(ctl_addr))
3697 plx_init(pdev, irq, ctl_addr);
3698
3699 dev_info(&pdev->dev, "Null number of ports detected. Board "
3700 "reset.\n");
3701 retval = 0;
3702 goto err;
3703 }
3704
3705 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
3706 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
3707
3708 /*
3709 Early firmware failed to start looking for commands.
3710 This enables firmware interrupts for those commands.
3711 */
3712 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
3713 (1 << 17));
3714 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
3715 0x00030800UL);
3716
3717 return nchan;
3718 err_rel:
3719 release_firmware(fw);
3720 err:
3721 return retval;
3722 }
3723
3724 static int __devinit cy_pci_probe(struct pci_dev *pdev,
3725 const struct pci_device_id *ent)
3726 {
3727 void __iomem *addr0 = NULL, *addr2 = NULL;
3728 char *card_name = NULL;
3729 u32 uninitialized_var(mailbox);
3730 unsigned int device_id, nchan = 0, card_no, i;
3731 unsigned char plx_ver;
3732 int retval, irq;
3733
3734 retval = pci_enable_device(pdev);
3735 if (retval) {
3736 dev_err(&pdev->dev, "cannot enable device\n");
3737 goto err;
3738 }
3739
3740 /* read PCI configuration area */
3741 irq = pdev->irq;
3742 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
3743
3744 #if defined(__alpha__)
3745 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
3746 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
3747 "addresses on Alpha systems.\n");
3748 retval = -EIO;
3749 goto err_dis;
3750 }
3751 #endif
3752 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
3753 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
3754 "addresses\n");
3755 retval = -EIO;
3756 goto err_dis;
3757 }
3758
3759 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
3760 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
3761 "it...\n");
3762 pdev->resource[2].flags &= ~IORESOURCE_IO;
3763 }
3764
3765 retval = pci_request_regions(pdev, "cyclades");
3766 if (retval) {
3767 dev_err(&pdev->dev, "failed to reserve resources\n");
3768 goto err_dis;
3769 }
3770
3771 retval = -EIO;
3772 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3773 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3774 card_name = "Cyclom-Y";
3775
3776 addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
3777 CyPCI_Yctl);
3778 if (addr0 == NULL) {
3779 dev_err(&pdev->dev, "can't remap ctl region\n");
3780 goto err_reg;
3781 }
3782 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
3783 CyPCI_Ywin);
3784 if (addr2 == NULL) {
3785 dev_err(&pdev->dev, "can't remap base region\n");
3786 goto err_unmap;
3787 }
3788
3789 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
3790 if (nchan == 0) {
3791 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
3792 "Serial-Modules\n");
3793 goto err_unmap;
3794 }
3795 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
3796 struct RUNTIME_9060 __iomem *ctl_addr;
3797
3798 ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
3799 CyPCI_Zctl);
3800 if (addr0 == NULL) {
3801 dev_err(&pdev->dev, "can't remap ctl region\n");
3802 goto err_reg;
3803 }
3804
3805 /* Disable interrupts on the PLX before resetting it */
3806 cy_writew(&ctl_addr->intr_ctrl_stat,
3807 readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
3808
3809 plx_init(pdev, irq, addr0);
3810
3811 mailbox = readl(&ctl_addr->mail_box_0);
3812
3813 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
3814 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
3815 if (addr2 == NULL) {
3816 dev_err(&pdev->dev, "can't remap base region\n");
3817 goto err_unmap;
3818 }
3819
3820 if (mailbox == ZE_V1) {
3821 card_name = "Cyclades-Ze";
3822 } else {
3823 card_name = "Cyclades-8Zo";
3824 #ifdef CY_PCI_DEBUG
3825 if (mailbox == ZO_V1) {
3826 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3827 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
3828 "id %lx, ver %lx\n", (ulong)(0xff &
3829 readl(&((struct CUSTOM_REG *)addr2)->
3830 fpga_id)), (ulong)(0xff &
3831 readl(&((struct CUSTOM_REG *)addr2)->
3832 fpga_version)));
3833 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3834 } else {
3835 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
3836 "Cyclades-Z board. FPGA not loaded\n");
3837 }
3838 #endif
3839 /* The following clears the firmware id word. This
3840 ensures that the driver will not attempt to talk to
3841 the board until it has been properly initialized.
3842 */
3843 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
3844 cy_writel(addr2 + ID_ADDRESS, 0L);
3845 }
3846
3847 retval = cyz_load_fw(pdev, addr2, addr0, irq);
3848 if (retval <= 0)
3849 goto err_unmap;
3850 nchan = retval;
3851 }
3852
3853 if ((cy_next_channel + nchan) > NR_PORTS) {
3854 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
3855 "channels are available. Change NR_PORTS in "
3856 "cyclades.c and recompile kernel.\n");
3857 goto err_unmap;
3858 }
3859 /* fill the next cy_card structure available */
3860 for (card_no = 0; card_no < NR_CARDS; card_no++) {
3861 if (cy_card[card_no].base_addr == NULL)
3862 break;
3863 }
3864 if (card_no == NR_CARDS) { /* no more cy_cards available */
3865 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
3866 "more cards can be used. Change NR_CARDS in "
3867 "cyclades.c and recompile kernel.\n");
3868 goto err_unmap;
3869 }
3870
3871 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3872 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3873 /* allocate IRQ */
3874 retval = request_irq(irq, cyy_interrupt,
3875 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
3876 if (retval) {
3877 dev_err(&pdev->dev, "could not allocate IRQ\n");
3878 goto err_unmap;
3879 }
3880 cy_card[card_no].num_chips = nchan / CyPORTS_PER_CHIP;
3881 } else {
3882 struct FIRM_ID __iomem *firm_id = addr2 + ID_ADDRESS;
3883 struct ZFW_CTRL __iomem *zfw_ctrl;
3884
3885 zfw_ctrl = addr2 + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3886
3887 cy_card[card_no].hw_ver = mailbox;
3888 cy_card[card_no].num_chips = (unsigned int)-1;
3889 cy_card[card_no].board_ctrl = &zfw_ctrl->board_ctrl;
3890 #ifdef CONFIG_CYZ_INTR
3891 /* allocate IRQ only if board has an IRQ */
3892 if (irq != 0 && irq != 255) {
3893 retval = request_irq(irq, cyz_interrupt,
3894 IRQF_SHARED, "Cyclades-Z",
3895 &cy_card[card_no]);
3896 if (retval) {
3897 dev_err(&pdev->dev, "could not allocate IRQ\n");
3898 goto err_unmap;
3899 }
3900 }
3901 #endif /* CONFIG_CYZ_INTR */
3902 }
3903
3904 /* set cy_card */
3905 cy_card[card_no].base_addr = addr2;
3906 cy_card[card_no].ctl_addr.p9050 = addr0;
3907 cy_card[card_no].irq = irq;
3908 cy_card[card_no].bus_index = 1;
3909 cy_card[card_no].first_line = cy_next_channel;
3910 cy_card[card_no].nports = nchan;
3911 retval = cy_init_card(&cy_card[card_no]);
3912 if (retval)
3913 goto err_null;
3914
3915 pci_set_drvdata(pdev, &cy_card[card_no]);
3916
3917 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3918 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3919 /* enable interrupts in the PCI interface */
3920 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
3921 switch (plx_ver) {
3922 case PLX_9050:
3923 cy_writeb(addr0 + 0x4c, 0x43);
3924 break;
3925
3926 case PLX_9060:
3927 case PLX_9080:
3928 default: /* Old boards, use PLX_9060 */
3929 {
3930 struct RUNTIME_9060 __iomem *ctl_addr = addr0;
3931 plx_init(pdev, irq, ctl_addr);
3932 cy_writew(&ctl_addr->intr_ctrl_stat,
3933 readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
3934 break;
3935 }
3936 }
3937 }
3938
3939 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
3940 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
3941 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
3942 tty_register_device(cy_serial_driver, i, &pdev->dev);
3943 cy_next_channel += nchan;
3944
3945 return 0;
3946 err_null:
3947 cy_card[card_no].base_addr = NULL;
3948 free_irq(irq, &cy_card[card_no]);
3949 err_unmap:
3950 iounmap(addr0);
3951 if (addr2)
3952 iounmap(addr2);
3953 err_reg:
3954 pci_release_regions(pdev);
3955 err_dis:
3956 pci_disable_device(pdev);
3957 err:
3958 return retval;
3959 }
3960
3961 static void __devexit cy_pci_remove(struct pci_dev *pdev)
3962 {
3963 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
3964 unsigned int i;
3965
3966 /* non-Z with old PLX */
3967 if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
3968 PLX_9050)
3969 cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
3970 else
3971 #ifndef CONFIG_CYZ_INTR
3972 if (!cy_is_Z(cinfo))
3973 #endif
3974 cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
3975 readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
3976 ~0x0900);
3977
3978 iounmap(cinfo->base_addr);
3979 if (cinfo->ctl_addr.p9050)
3980 iounmap(cinfo->ctl_addr.p9050);
3981 if (cinfo->irq
3982 #ifndef CONFIG_CYZ_INTR
3983 && !cy_is_Z(cinfo)
3984 #endif /* CONFIG_CYZ_INTR */
3985 )
3986 free_irq(cinfo->irq, cinfo);
3987 pci_release_regions(pdev);
3988
3989 cinfo->base_addr = NULL;
3990 for (i = cinfo->first_line; i < cinfo->first_line +
3991 cinfo->nports; i++)
3992 tty_unregister_device(cy_serial_driver, i);
3993 cinfo->nports = 0;
3994 kfree(cinfo->ports);
3995 }
3996
3997 static struct pci_driver cy_pci_driver = {
3998 .name = "cyclades",
3999 .id_table = cy_pci_dev_id,
4000 .probe = cy_pci_probe,
4001 .remove = __devexit_p(cy_pci_remove)
4002 };
4003 #endif
4004
4005 static int cyclades_proc_show(struct seq_file *m, void *v)
4006 {
4007 struct cyclades_port *info;
4008 unsigned int i, j;
4009 __u32 cur_jifs = jiffies;
4010
4011 seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
4012 "IdleIn Overruns Ldisc\n");
4013
4014 /* Output one line for each known port */
4015 for (i = 0; i < NR_CARDS; i++)
4016 for (j = 0; j < cy_card[i].nports; j++) {
4017 info = &cy_card[i].ports[j];
4018
4019 if (info->port.count) {
4020 /* XXX is the ldisc num worth this? */
4021 struct tty_struct *tty;
4022 struct tty_ldisc *ld;
4023 int num = 0;
4024 tty = tty_port_tty_get(&info->port);
4025 if (tty) {
4026 ld = tty_ldisc_ref(tty);
4027 if (ld) {
4028 num = ld->ops->num;
4029 tty_ldisc_deref(ld);
4030 }
4031 tty_kref_put(tty);
4032 }
4033 seq_printf(m, "%3d %8lu %10lu %8lu "
4034 "%10lu %8lu %9lu %6d\n", info->line,
4035 (cur_jifs - info->idle_stats.in_use) /
4036 HZ, info->idle_stats.xmit_bytes,
4037 (cur_jifs - info->idle_stats.xmit_idle)/
4038 HZ, info->idle_stats.recv_bytes,
4039 (cur_jifs - info->idle_stats.recv_idle)/
4040 HZ, info->idle_stats.overruns,
4041 num);
4042 } else
4043 seq_printf(m, "%3d %8lu %10lu %8lu "
4044 "%10lu %8lu %9lu %6ld\n",
4045 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
4046 }
4047 return 0;
4048 }
4049
4050 static int cyclades_proc_open(struct inode *inode, struct file *file)
4051 {
4052 return single_open(file, cyclades_proc_show, NULL);
4053 }
4054
4055 static const struct file_operations cyclades_proc_fops = {
4056 .owner = THIS_MODULE,
4057 .open = cyclades_proc_open,
4058 .read = seq_read,
4059 .llseek = seq_lseek,
4060 .release = single_release,
4061 };
4062
4063 /* The serial driver boot-time initialization code!
4064 Hardware I/O ports are mapped to character special devices on a
4065 first found, first allocated manner. That is, this code searches
4066 for Cyclom cards in the system. As each is found, it is probed
4067 to discover how many chips (and thus how many ports) are present.
4068 These ports are mapped to the tty ports 32 and upward in monotonic
4069 fashion. If an 8-port card is replaced with a 16-port card, the
4070 port mapping on a following card will shift.
4071
4072 This approach is different from what is used in the other serial
4073 device driver because the Cyclom is more properly a multiplexer,
4074 not just an aggregation of serial ports on one card.
4075
4076 If there are more cards with more ports than have been
4077 statically allocated above, a warning is printed and the
4078 extra ports are ignored.
4079 */
4080
4081 static const struct tty_operations cy_ops = {
4082 .open = cy_open,
4083 .close = cy_close,
4084 .write = cy_write,
4085 .put_char = cy_put_char,
4086 .flush_chars = cy_flush_chars,
4087 .write_room = cy_write_room,
4088 .chars_in_buffer = cy_chars_in_buffer,
4089 .flush_buffer = cy_flush_buffer,
4090 .ioctl = cy_ioctl,
4091 .throttle = cy_throttle,
4092 .unthrottle = cy_unthrottle,
4093 .set_termios = cy_set_termios,
4094 .stop = cy_stop,
4095 .start = cy_start,
4096 .hangup = cy_hangup,
4097 .break_ctl = cy_break,
4098 .wait_until_sent = cy_wait_until_sent,
4099 .tiocmget = cy_tiocmget,
4100 .tiocmset = cy_tiocmset,
4101 .proc_fops = &cyclades_proc_fops,
4102 };
4103
4104 static int __init cy_init(void)
4105 {
4106 unsigned int nboards;
4107 int retval = -ENOMEM;
4108
4109 cy_serial_driver = alloc_tty_driver(NR_PORTS);
4110 if (!cy_serial_driver)
4111 goto err;
4112
4113 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
4114 __DATE__, __TIME__);
4115
4116 /* Initialize the tty_driver structure */
4117
4118 cy_serial_driver->owner = THIS_MODULE;
4119 cy_serial_driver->driver_name = "cyclades";
4120 cy_serial_driver->name = "ttyC";
4121 cy_serial_driver->major = CYCLADES_MAJOR;
4122 cy_serial_driver->minor_start = 0;
4123 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
4124 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
4125 cy_serial_driver->init_termios = tty_std_termios;
4126 cy_serial_driver->init_termios.c_cflag =
4127 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
4128 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4129 tty_set_operations(cy_serial_driver, &cy_ops);
4130
4131 retval = tty_register_driver(cy_serial_driver);
4132 if (retval) {
4133 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
4134 goto err_frtty;
4135 }
4136
4137 /* the code below is responsible to find the boards. Each different
4138 type of board has its own detection routine. If a board is found,
4139 the next cy_card structure available is set by the detection
4140 routine. These functions are responsible for checking the
4141 availability of cy_card and cy_port data structures and updating
4142 the cy_next_channel. */
4143
4144 /* look for isa boards */
4145 nboards = cy_detect_isa();
4146
4147 #ifdef CONFIG_PCI
4148 /* look for pci boards */
4149 retval = pci_register_driver(&cy_pci_driver);
4150 if (retval && !nboards) {
4151 tty_unregister_driver(cy_serial_driver);
4152 goto err_frtty;
4153 }
4154 #endif
4155
4156 return 0;
4157 err_frtty:
4158 put_tty_driver(cy_serial_driver);
4159 err:
4160 return retval;
4161 } /* cy_init */
4162
4163 static void __exit cy_cleanup_module(void)
4164 {
4165 struct cyclades_card *card;
4166 unsigned int i, e1;
4167
4168 #ifndef CONFIG_CYZ_INTR
4169 del_timer_sync(&cyz_timerlist);
4170 #endif /* CONFIG_CYZ_INTR */
4171
4172 e1 = tty_unregister_driver(cy_serial_driver);
4173 if (e1)
4174 printk(KERN_ERR "failed to unregister Cyclades serial "
4175 "driver(%d)\n", e1);
4176
4177 #ifdef CONFIG_PCI
4178 pci_unregister_driver(&cy_pci_driver);
4179 #endif
4180
4181 for (i = 0; i < NR_CARDS; i++) {
4182 card = &cy_card[i];
4183 if (card->base_addr) {
4184 /* clear interrupt */
4185 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
4186 iounmap(card->base_addr);
4187 if (card->ctl_addr.p9050)
4188 iounmap(card->ctl_addr.p9050);
4189 if (card->irq
4190 #ifndef CONFIG_CYZ_INTR
4191 && !cy_is_Z(card)
4192 #endif /* CONFIG_CYZ_INTR */
4193 )
4194 free_irq(card->irq, card);
4195 for (e1 = card->first_line; e1 < card->first_line +
4196 card->nports; e1++)
4197 tty_unregister_device(cy_serial_driver, e1);
4198 kfree(card->ports);
4199 }
4200 }
4201
4202 put_tty_driver(cy_serial_driver);
4203 } /* cy_cleanup_module */
4204
4205 module_init(cy_init);
4206 module_exit(cy_cleanup_module);
4207
4208 MODULE_LICENSE("GPL");
4209 MODULE_VERSION(CY_VERSION);
4210 MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);
Linux with added FPC-III support