3 #undef Z_EXT_CHARS_IN_BUFFER
6 * linux/drivers/char/cyclades.c
8 * This file contains the driver for the Cyclades async multiport
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
14 * Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com>
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.
24 #define CY_VERSION "2.6"
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. */
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. */
43 #define SERIAL_PARANOIA_CHECK
45 #undef CY_DEBUG_THROTTLE
50 #undef CY_DEBUG_WAIT_UNTIL_SENT
51 #undef CY_DEBUG_INTERRUPTS
53 #undef CY_ENABLE_MONITORING
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>
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>
84 #include <linux/uaccess.h>
86 #include <linux/kernel.h>
87 #include <linux/pci.h>
89 #include <linux/stat.h>
90 #include <linux/proc_fs.h>
91 #include <linux/seq_file.h>
93 static void cy_send_xchar(struct tty_struct
*tty
, char ch
);
95 #ifndef SERIAL_XMIT_SIZE
96 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
99 #define STD_COM_FLAGS (0)
102 #define ZL_MAX_BLOCKS 16
103 #define DRIVER_VERSION 0x02010203
104 #define RAM_SIZE 0x80000
111 struct zfile_header
{
120 } __attribute__ ((packed
));
122 struct zfile_config
{
127 u32 block_list
[ZL_MAX_BLOCKS
];
128 } __attribute__ ((packed
));
135 } __attribute__ ((packed
));
137 static struct tty_driver
*cy_serial_driver
;
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.
147 static unsigned int cy_isa_addresses
[] = {
156 0, 0, 0, 0, 0, 0, 0, 0
159 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
161 static long maddr
[NR_CARDS
];
162 static int irq
[NR_CARDS
];
164 module_param_array(maddr
, long, NULL
, 0);
165 module_param_array(irq
, int, NULL
, 0);
167 #endif /* CONFIG_ISA */
169 /* This is the per-card data structure containing address, irq, number of
170 channels, etc. This driver supports a maximum of NR_CARDS cards.
172 static struct cyclades_card cy_card
[NR_CARDS
];
174 static int cy_next_channel
; /* next minor available */
177 * This is used to look up the divisor speeds and the timeouts
178 * We're normally limited to 15 distinct baud rates. The extra
179 * are accessed via settings in info->port.flags.
180 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
181 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
185 static const int baud_table
[] = {
186 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
187 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
191 static const char baud_co_25
[] = { /* 25 MHz clock option table */
192 /* value => 00 01 02 03 04 */
193 /* divide by 8 32 128 512 2048 */
194 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
195 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
198 static const char baud_bpr_25
[] = { /* 25 MHz baud rate period table */
199 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
200 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
203 static const char baud_co_60
[] = { /* 60 MHz clock option table (CD1400 J) */
204 /* value => 00 01 02 03 04 */
205 /* divide by 8 32 128 512 2048 */
206 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
207 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
211 static const char baud_bpr_60
[] = { /* 60 MHz baud rate period table (CD1400 J) */
212 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
213 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
217 static const char baud_cor3
[] = { /* receive threshold */
218 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
219 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
224 * The Cyclades driver implements HW flow control as any serial driver.
225 * The cyclades_port structure member rflow and the vector rflow_thr
226 * allows us to take advantage of a special feature in the CD1400 to avoid
227 * data loss even when the system interrupt latency is too high. These flags
228 * are to be used only with very special applications. Setting these flags
229 * requires the use of a special cable (DTR and RTS reversed). In the new
230 * CD1400-based boards (rev. 6.00 or later), there is no need for special
234 static const char rflow_thr
[] = { /* rflow threshold */
235 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
236 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
240 /* The Cyclom-Ye has placed the sequential chips in non-sequential
241 * address order. This look-up table overcomes that problem.
243 static const unsigned int cy_chip_offset
[] = { 0x0000,
253 /* PCI related definitions */
256 static const struct pci_device_id cy_pci_dev_id
[] = {
258 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_Y_Lo
) },
260 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_Y_Hi
) },
262 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_4Y_Lo
) },
264 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_4Y_Hi
) },
266 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_8Y_Lo
) },
268 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_8Y_Hi
) },
270 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_Z_Lo
) },
272 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES
, PCI_DEVICE_ID_CYCLOM_Z_Hi
) },
273 { } /* end of table */
275 MODULE_DEVICE_TABLE(pci
, cy_pci_dev_id
);
278 static void cy_start(struct tty_struct
*);
279 static void cy_set_line_char(struct cyclades_port
*, struct tty_struct
*);
280 static int cyz_issue_cmd(struct cyclades_card
*, __u32
, __u8
, __u32
);
282 static unsigned detect_isa_irq(void __iomem
*);
283 #endif /* CONFIG_ISA */
285 #ifndef CONFIG_CYZ_INTR
286 static void cyz_poll(unsigned long);
288 /* The Cyclades-Z polling cycle is defined by this variable */
289 static long cyz_polling_cycle
= CZ_DEF_POLL
;
291 static DEFINE_TIMER(cyz_timerlist
, cyz_poll
, 0, 0);
293 #else /* CONFIG_CYZ_INTR */
294 static void cyz_rx_restart(unsigned long);
295 static struct timer_list cyz_rx_full_timer
[NR_PORTS
];
296 #endif /* CONFIG_CYZ_INTR */
298 static inline void cyy_writeb(struct cyclades_port
*port
, u32 reg
, u8 val
)
300 struct cyclades_card
*card
= port
->card
;
302 cy_writeb(port
->u
.cyy
.base_addr
+ (reg
<< card
->bus_index
), val
);
305 static inline u8
cyy_readb(struct cyclades_port
*port
, u32 reg
)
307 struct cyclades_card
*card
= port
->card
;
309 return readb(port
->u
.cyy
.base_addr
+ (reg
<< card
->bus_index
));
312 static inline bool cy_is_Z(struct cyclades_card
*card
)
314 return card
->num_chips
== (unsigned int)-1;
317 static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem
*ctl_addr
)
319 return readl(&ctl_addr
->init_ctrl
) & (1 << 17);
322 static inline bool cyz_fpga_loaded(struct cyclades_card
*card
)
324 return __cyz_fpga_loaded(card
->ctl_addr
.p9060
);
327 static inline bool cyz_is_loaded(struct cyclades_card
*card
)
329 struct FIRM_ID __iomem
*fw_id
= card
->base_addr
+ ID_ADDRESS
;
331 return (card
->hw_ver
== ZO_V1
|| cyz_fpga_loaded(card
)) &&
332 readl(&fw_id
->signature
) == ZFIRM_ID
;
335 static inline int serial_paranoia_check(struct cyclades_port
*info
,
336 const char *name
, const char *routine
)
338 #ifdef SERIAL_PARANOIA_CHECK
340 printk(KERN_WARNING
"cyc Warning: null cyclades_port for (%s) "
341 "in %s\n", name
, routine
);
345 if (info
->magic
!= CYCLADES_MAGIC
) {
346 printk(KERN_WARNING
"cyc Warning: bad magic number for serial "
347 "struct (%s) in %s\n", name
, routine
);
354 /***********************************************************/
355 /********* Start of block of Cyclom-Y specific code ********/
357 /* This routine waits up to 1000 micro-seconds for the previous
358 command to the Cirrus chip to complete and then issues the
359 new command. An error is returned if the previous command
360 didn't finish within the time limit.
362 This function is only called from inside spinlock-protected code.
364 static int __cyy_issue_cmd(void __iomem
*base_addr
, u8 cmd
, int index
)
366 void __iomem
*ccr
= base_addr
+ (CyCCR
<< index
);
369 /* Check to see that the previous command has completed */
370 for (i
= 0; i
< 100; i
++) {
375 /* if the CCR never cleared, the previous command
376 didn't finish within the "reasonable time" */
380 /* Issue the new command */
386 static inline int cyy_issue_cmd(struct cyclades_port
*port
, u8 cmd
)
388 return __cyy_issue_cmd(port
->u
.cyy
.base_addr
, cmd
,
389 port
->card
->bus_index
);
393 /* ISA interrupt detection code */
394 static unsigned detect_isa_irq(void __iomem
*address
)
397 unsigned long irqs
, flags
;
398 int save_xir
, save_car
;
399 int index
= 0; /* IRQ probing is only for ISA */
401 /* forget possible initially masked and pending IRQ */
402 irq
= probe_irq_off(probe_irq_on());
404 /* Clear interrupts on the board first */
405 cy_writeb(address
+ (Cy_ClrIntr
<< index
), 0);
406 /* Cy_ClrIntr is 0x1800 */
408 irqs
= probe_irq_on();
412 /* Enable the Tx interrupts on the CD1400 */
413 local_irq_save(flags
);
414 cy_writeb(address
+ (CyCAR
<< index
), 0);
415 __cyy_issue_cmd(address
, CyCHAN_CTL
| CyENB_XMTR
, index
);
417 cy_writeb(address
+ (CyCAR
<< index
), 0);
418 cy_writeb(address
+ (CySRER
<< index
),
419 readb(address
+ (CySRER
<< index
)) | CyTxRdy
);
420 local_irq_restore(flags
);
425 /* Check which interrupt is in use */
426 irq
= probe_irq_off(irqs
);
429 save_xir
= (u_char
) readb(address
+ (CyTIR
<< index
));
430 save_car
= readb(address
+ (CyCAR
<< index
));
431 cy_writeb(address
+ (CyCAR
<< index
), (save_xir
& 0x3));
432 cy_writeb(address
+ (CySRER
<< index
),
433 readb(address
+ (CySRER
<< index
)) & ~CyTxRdy
);
434 cy_writeb(address
+ (CyTIR
<< index
), (save_xir
& 0x3f));
435 cy_writeb(address
+ (CyCAR
<< index
), (save_car
));
436 cy_writeb(address
+ (Cy_ClrIntr
<< index
), 0);
437 /* Cy_ClrIntr is 0x1800 */
439 return (irq
> 0) ? irq
: 0;
441 #endif /* CONFIG_ISA */
443 static void cyy_chip_rx(struct cyclades_card
*cinfo
, int chip
,
444 void __iomem
*base_addr
)
446 struct cyclades_port
*info
;
447 struct tty_struct
*tty
;
448 int len
, index
= cinfo
->bus_index
;
449 u8 ivr
, save_xir
, channel
, save_car
, data
, char_count
;
451 #ifdef CY_DEBUG_INTERRUPTS
452 printk(KERN_DEBUG
"cyy_interrupt: rcvd intr, chip %d\n", chip
);
454 /* determine the channel & change to that context */
455 save_xir
= readb(base_addr
+ (CyRIR
<< index
));
456 channel
= save_xir
& CyIRChannel
;
457 info
= &cinfo
->ports
[channel
+ chip
* 4];
458 save_car
= cyy_readb(info
, CyCAR
);
459 cyy_writeb(info
, CyCAR
, save_xir
);
460 ivr
= cyy_readb(info
, CyRIVR
) & CyIVRMask
;
462 tty
= tty_port_tty_get(&info
->port
);
463 /* if there is nowhere to put the data, discard it */
465 if (ivr
== CyIVRRxEx
) { /* exception */
466 data
= cyy_readb(info
, CyRDSR
);
467 } else { /* normal character reception */
468 char_count
= cyy_readb(info
, CyRDCR
);
470 data
= cyy_readb(info
, CyRDSR
);
474 /* there is an open port for this data */
475 if (ivr
== CyIVRRxEx
) { /* exception */
476 data
= cyy_readb(info
, CyRDSR
);
478 /* For statistics only */
481 else if (data
& CyFRAME
)
482 info
->icount
.frame
++;
483 else if (data
& CyPARITY
)
484 info
->icount
.parity
++;
485 else if (data
& CyOVERRUN
)
486 info
->icount
.overrun
++;
488 if (data
& info
->ignore_status_mask
) {
493 if (tty_buffer_request_room(tty
, 1)) {
494 if (data
& info
->read_status_mask
) {
495 if (data
& CyBREAK
) {
496 tty_insert_flip_char(tty
,
497 cyy_readb(info
, CyRDSR
),
500 if (info
->port
.flags
& ASYNC_SAK
)
502 } else if (data
& CyFRAME
) {
503 tty_insert_flip_char(tty
,
504 cyy_readb(info
, CyRDSR
),
507 info
->idle_stats
.frame_errs
++;
508 } else if (data
& CyPARITY
) {
509 /* Pieces of seven... */
510 tty_insert_flip_char(tty
,
511 cyy_readb(info
, CyRDSR
),
514 info
->idle_stats
.parity_errs
++;
515 } else if (data
& CyOVERRUN
) {
516 tty_insert_flip_char(tty
, 0,
519 /* If the flip buffer itself is
520 overflowing, we still lose
521 the next incoming character.
523 tty_insert_flip_char(tty
,
524 cyy_readb(info
, CyRDSR
),
527 info
->idle_stats
.overruns
++;
528 /* These two conditions may imply */
529 /* a normal read should be done. */
530 /* } else if(data & CyTIMEOUT) { */
531 /* } else if(data & CySPECHAR) { */
533 tty_insert_flip_char(tty
, 0,
538 tty_insert_flip_char(tty
, 0, TTY_NORMAL
);
542 /* there was a software buffer overrun and nothing
543 * could be done about it!!! */
544 info
->icount
.buf_overrun
++;
545 info
->idle_stats
.overruns
++;
547 } else { /* normal character reception */
548 /* load # chars available from the chip */
549 char_count
= cyy_readb(info
, CyRDCR
);
551 #ifdef CY_ENABLE_MONITORING
552 ++info
->mon
.int_count
;
553 info
->mon
.char_count
+= char_count
;
554 if (char_count
> info
->mon
.char_max
)
555 info
->mon
.char_max
= char_count
;
556 info
->mon
.char_last
= char_count
;
558 len
= tty_buffer_request_room(tty
, char_count
);
560 data
= cyy_readb(info
, CyRDSR
);
561 tty_insert_flip_char(tty
, data
, TTY_NORMAL
);
562 info
->idle_stats
.recv_bytes
++;
568 info
->idle_stats
.recv_idle
= jiffies
;
570 tty_schedule_flip(tty
);
574 cyy_writeb(info
, CyRIR
, save_xir
& 0x3f);
575 cyy_writeb(info
, CyCAR
, save_car
);
578 static void cyy_chip_tx(struct cyclades_card
*cinfo
, unsigned int chip
,
579 void __iomem
*base_addr
)
581 struct cyclades_port
*info
;
582 struct tty_struct
*tty
;
583 int char_count
, index
= cinfo
->bus_index
;
584 u8 save_xir
, channel
, save_car
, outch
;
586 /* Since we only get here when the transmit buffer
587 is empty, we know we can always stuff a dozen
589 #ifdef CY_DEBUG_INTERRUPTS
590 printk(KERN_DEBUG
"cyy_interrupt: xmit intr, chip %d\n", chip
);
593 /* determine the channel & change to that context */
594 save_xir
= readb(base_addr
+ (CyTIR
<< index
));
595 channel
= save_xir
& CyIRChannel
;
596 save_car
= readb(base_addr
+ (CyCAR
<< index
));
597 cy_writeb(base_addr
+ (CyCAR
<< index
), save_xir
);
599 info
= &cinfo
->ports
[channel
+ chip
* 4];
600 tty
= tty_port_tty_get(&info
->port
);
602 cyy_writeb(info
, CySRER
, cyy_readb(info
, CySRER
) & ~CyTxRdy
);
606 /* load the on-chip space for outbound data */
607 char_count
= info
->xmit_fifo_size
;
609 if (info
->x_char
) { /* send special char */
610 outch
= info
->x_char
;
611 cyy_writeb(info
, CyTDR
, outch
);
617 if (info
->breakon
|| info
->breakoff
) {
619 cyy_writeb(info
, CyTDR
, 0);
620 cyy_writeb(info
, CyTDR
, 0x81);
624 if (info
->breakoff
) {
625 cyy_writeb(info
, CyTDR
, 0);
626 cyy_writeb(info
, CyTDR
, 0x83);
632 while (char_count
-- > 0) {
633 if (!info
->xmit_cnt
) {
634 if (cyy_readb(info
, CySRER
) & CyTxMpty
) {
635 cyy_writeb(info
, CySRER
,
636 cyy_readb(info
, CySRER
) & ~CyTxMpty
);
638 cyy_writeb(info
, CySRER
, CyTxMpty
|
639 (cyy_readb(info
, CySRER
) & ~CyTxRdy
));
643 if (info
->port
.xmit_buf
== NULL
) {
644 cyy_writeb(info
, CySRER
,
645 cyy_readb(info
, CySRER
) & ~CyTxRdy
);
648 if (tty
->stopped
|| tty
->hw_stopped
) {
649 cyy_writeb(info
, CySRER
,
650 cyy_readb(info
, CySRER
) & ~CyTxRdy
);
653 /* Because the Embedded Transmit Commands have been enabled,
654 * we must check to see if the escape character, NULL, is being
655 * sent. If it is, we must ensure that there is room for it to
656 * be doubled in the output stream. Therefore we no longer
657 * advance the pointer when the character is fetched, but
658 * rather wait until after the check for a NULL output
659 * character. This is necessary because there may not be room
660 * for the two chars needed to send a NULL.)
662 outch
= info
->port
.xmit_buf
[info
->xmit_tail
];
665 info
->xmit_tail
= (info
->xmit_tail
+ 1) &
666 (SERIAL_XMIT_SIZE
- 1);
667 cyy_writeb(info
, CyTDR
, outch
);
670 if (char_count
> 1) {
672 info
->xmit_tail
= (info
->xmit_tail
+ 1) &
673 (SERIAL_XMIT_SIZE
- 1);
674 cyy_writeb(info
, CyTDR
, outch
);
675 cyy_writeb(info
, CyTDR
, 0);
687 cyy_writeb(info
, CyTIR
, save_xir
& 0x3f);
688 cyy_writeb(info
, CyCAR
, save_car
);
691 static void cyy_chip_modem(struct cyclades_card
*cinfo
, int chip
,
692 void __iomem
*base_addr
)
694 struct cyclades_port
*info
;
695 struct tty_struct
*tty
;
696 int index
= cinfo
->bus_index
;
697 u8 save_xir
, channel
, save_car
, mdm_change
, mdm_status
;
699 /* determine the channel & change to that context */
700 save_xir
= readb(base_addr
+ (CyMIR
<< index
));
701 channel
= save_xir
& CyIRChannel
;
702 info
= &cinfo
->ports
[channel
+ chip
* 4];
703 save_car
= cyy_readb(info
, CyCAR
);
704 cyy_writeb(info
, CyCAR
, save_xir
);
706 mdm_change
= cyy_readb(info
, CyMISR
);
707 mdm_status
= cyy_readb(info
, CyMSVR1
);
709 tty
= tty_port_tty_get(&info
->port
);
713 if (mdm_change
& CyANY_DELTA
) {
714 /* For statistics only */
715 if (mdm_change
& CyDCD
)
717 if (mdm_change
& CyCTS
)
719 if (mdm_change
& CyDSR
)
721 if (mdm_change
& CyRI
)
724 wake_up_interruptible(&info
->port
.delta_msr_wait
);
727 if ((mdm_change
& CyDCD
) && (info
->port
.flags
& ASYNC_CHECK_CD
)) {
728 if (mdm_status
& CyDCD
)
729 wake_up_interruptible(&info
->port
.open_wait
);
733 if ((mdm_change
& CyCTS
) && (info
->port
.flags
& ASYNC_CTS_FLOW
)) {
734 if (tty
->hw_stopped
) {
735 if (mdm_status
& CyCTS
) {
736 /* cy_start isn't used
739 cyy_writeb(info
, CySRER
,
740 cyy_readb(info
, CySRER
) | CyTxRdy
);
744 if (!(mdm_status
& CyCTS
)) {
745 /* cy_stop isn't used
748 cyy_writeb(info
, CySRER
,
749 cyy_readb(info
, CySRER
) & ~CyTxRdy
);
753 /* if (mdm_change & CyDSR) {
755 if (mdm_change & CyRI) {
760 cyy_writeb(info
, CyMIR
, save_xir
& 0x3f);
761 cyy_writeb(info
, CyCAR
, save_car
);
764 /* The real interrupt service routine is called
765 whenever the card wants its hand held--chars
766 received, out buffer empty, modem change, etc.
768 static irqreturn_t
cyy_interrupt(int irq
, void *dev_id
)
771 struct cyclades_card
*cinfo
= dev_id
;
772 void __iomem
*base_addr
, *card_base_addr
;
773 unsigned int chip
, too_many
, had_work
;
776 if (unlikely(cinfo
== NULL
)) {
777 #ifdef CY_DEBUG_INTERRUPTS
778 printk(KERN_DEBUG
"cyy_interrupt: spurious interrupt %d\n",
781 return IRQ_NONE
; /* spurious interrupt */
784 card_base_addr
= cinfo
->base_addr
;
785 index
= cinfo
->bus_index
;
787 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
788 if (unlikely(card_base_addr
== NULL
))
791 /* This loop checks all chips in the card. Make a note whenever
792 _any_ chip had some work to do, as this is considered an
793 indication that there will be more to do. Only when no chip
794 has any work does this outermost loop exit.
798 for (chip
= 0; chip
< cinfo
->num_chips
; chip
++) {
799 base_addr
= cinfo
->base_addr
+
800 (cy_chip_offset
[chip
] << index
);
802 while ((status
= readb(base_addr
+
803 (CySVRR
<< index
))) != 0x00) {
805 /* The purpose of the following test is to ensure that
806 no chip can monopolize the driver. This forces the
807 chips to be checked in a round-robin fashion (after
808 draining each of a bunch (1000) of characters).
810 if (1000 < too_many
++)
812 spin_lock(&cinfo
->card_lock
);
813 if (status
& CySRReceive
) /* rx intr */
814 cyy_chip_rx(cinfo
, chip
, base_addr
);
815 if (status
& CySRTransmit
) /* tx intr */
816 cyy_chip_tx(cinfo
, chip
, base_addr
);
817 if (status
& CySRModem
) /* modem intr */
818 cyy_chip_modem(cinfo
, chip
, base_addr
);
819 spin_unlock(&cinfo
->card_lock
);
824 /* clear interrupts */
825 spin_lock(&cinfo
->card_lock
);
826 cy_writeb(card_base_addr
+ (Cy_ClrIntr
<< index
), 0);
827 /* Cy_ClrIntr is 0x1800 */
828 spin_unlock(&cinfo
->card_lock
);
830 } /* cyy_interrupt */
832 static void cyy_change_rts_dtr(struct cyclades_port
*info
, unsigned int set
,
835 struct cyclades_card
*card
= info
->card
;
836 int channel
= info
->line
- card
->first_line
;
837 u32 rts
, dtr
, msvrr
, msvrd
;
841 if (info
->rtsdtr_inv
) {
852 if (set
& TIOCM_RTS
) {
853 cyy_writeb(info
, CyCAR
, channel
);
854 cyy_writeb(info
, msvrr
, rts
);
856 if (clear
& TIOCM_RTS
) {
857 cyy_writeb(info
, CyCAR
, channel
);
858 cyy_writeb(info
, msvrr
, ~rts
);
860 if (set
& TIOCM_DTR
) {
861 cyy_writeb(info
, CyCAR
, channel
);
862 cyy_writeb(info
, msvrd
, dtr
);
864 printk(KERN_DEBUG
"cyc:set_modem_info raising DTR\n");
865 printk(KERN_DEBUG
" status: 0x%x, 0x%x\n",
866 cyy_readb(info
, CyMSVR1
),
867 cyy_readb(info
, CyMSVR2
));
870 if (clear
& TIOCM_DTR
) {
871 cyy_writeb(info
, CyCAR
, channel
);
872 cyy_writeb(info
, msvrd
, ~dtr
);
874 printk(KERN_DEBUG
"cyc:set_modem_info dropping DTR\n");
875 printk(KERN_DEBUG
" status: 0x%x, 0x%x\n",
876 cyy_readb(info
, CyMSVR1
),
877 cyy_readb(info
, CyMSVR2
));
882 /***********************************************************/
883 /********* End of block of Cyclom-Y specific code **********/
884 /******** Start of block of Cyclades-Z specific code *******/
885 /***********************************************************/
888 cyz_fetch_msg(struct cyclades_card
*cinfo
,
889 __u32
*channel
, __u8
*cmd
, __u32
*param
)
891 struct BOARD_CTRL __iomem
*board_ctrl
= cinfo
->board_ctrl
;
892 unsigned long loc_doorbell
;
894 loc_doorbell
= readl(&cinfo
->ctl_addr
.p9060
->loc_doorbell
);
896 *cmd
= (char)(0xff & loc_doorbell
);
897 *channel
= readl(&board_ctrl
->fwcmd_channel
);
898 *param
= (__u32
) readl(&board_ctrl
->fwcmd_param
);
899 cy_writel(&cinfo
->ctl_addr
.p9060
->loc_doorbell
, 0xffffffff);
903 } /* cyz_fetch_msg */
906 cyz_issue_cmd(struct cyclades_card
*cinfo
,
907 __u32 channel
, __u8 cmd
, __u32 param
)
909 struct BOARD_CTRL __iomem
*board_ctrl
= cinfo
->board_ctrl
;
910 __u32 __iomem
*pci_doorbell
;
913 if (!cyz_is_loaded(cinfo
))
917 pci_doorbell
= &cinfo
->ctl_addr
.p9060
->pci_doorbell
;
918 while ((readl(pci_doorbell
) & 0xff) != 0) {
920 return (int)(readl(pci_doorbell
) & 0xff);
923 cy_writel(&board_ctrl
->hcmd_channel
, channel
);
924 cy_writel(&board_ctrl
->hcmd_param
, param
);
925 cy_writel(pci_doorbell
, (long)cmd
);
928 } /* cyz_issue_cmd */
930 static void cyz_handle_rx(struct cyclades_port
*info
, struct tty_struct
*tty
)
932 struct BUF_CTRL __iomem
*buf_ctrl
= info
->u
.cyz
.buf_ctrl
;
933 struct cyclades_card
*cinfo
= info
->card
;
934 unsigned int char_count
;
941 __u32 rx_put
, rx_get
, new_rx_get
, rx_bufsize
, rx_bufaddr
;
943 rx_get
= new_rx_get
= readl(&buf_ctrl
->rx_get
);
944 rx_put
= readl(&buf_ctrl
->rx_put
);
945 rx_bufsize
= readl(&buf_ctrl
->rx_bufsize
);
946 rx_bufaddr
= readl(&buf_ctrl
->rx_bufaddr
);
947 if (rx_put
>= rx_get
)
948 char_count
= rx_put
- rx_get
;
950 char_count
= rx_put
- rx_get
+ rx_bufsize
;
953 #ifdef CY_ENABLE_MONITORING
954 info
->mon
.int_count
++;
955 info
->mon
.char_count
+= char_count
;
956 if (char_count
> info
->mon
.char_max
)
957 info
->mon
.char_max
= char_count
;
958 info
->mon
.char_last
= char_count
;
961 /* flush received characters */
962 new_rx_get
= (new_rx_get
+ char_count
) &
964 info
->rflush_count
++;
967 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
968 for performance, but because of buffer boundaries, there
969 may be several steps to the operation */
971 len
= tty_prepare_flip_string(tty
, &buf
,
976 len
= min_t(unsigned int, min(len
, char_count
),
977 rx_bufsize
- new_rx_get
);
979 memcpy_fromio(buf
, cinfo
->base_addr
+
980 rx_bufaddr
+ new_rx_get
, len
);
982 new_rx_get
= (new_rx_get
+ len
) &
985 info
->icount
.rx
+= len
;
986 info
->idle_stats
.recv_bytes
+= len
;
989 len
= tty_buffer_request_room(tty
, char_count
);
991 data
= readb(cinfo
->base_addr
+ rx_bufaddr
+
993 new_rx_get
= (new_rx_get
+ 1) &
995 tty_insert_flip_char(tty
, data
, TTY_NORMAL
);
996 info
->idle_stats
.recv_bytes
++;
1000 #ifdef CONFIG_CYZ_INTR
1001 /* Recalculate the number of chars in the RX buffer and issue
1002 a cmd in case it's higher than the RX high water mark */
1003 rx_put
= readl(&buf_ctrl
->rx_put
);
1004 if (rx_put
>= rx_get
)
1005 char_count
= rx_put
- rx_get
;
1007 char_count
= rx_put
- rx_get
+ rx_bufsize
;
1008 if (char_count
>= readl(&buf_ctrl
->rx_threshold
) &&
1009 !timer_pending(&cyz_rx_full_timer
[
1011 mod_timer(&cyz_rx_full_timer
[info
->line
],
1014 info
->idle_stats
.recv_idle
= jiffies
;
1015 tty_schedule_flip(tty
);
1018 cy_writel(&buf_ctrl
->rx_get
, new_rx_get
);
1022 static void cyz_handle_tx(struct cyclades_port
*info
, struct tty_struct
*tty
)
1024 struct BUF_CTRL __iomem
*buf_ctrl
= info
->u
.cyz
.buf_ctrl
;
1025 struct cyclades_card
*cinfo
= info
->card
;
1027 unsigned int char_count
;
1031 __u32 tx_put
, tx_get
, tx_bufsize
, tx_bufaddr
;
1033 if (info
->xmit_cnt
<= 0) /* Nothing to transmit */
1036 tx_get
= readl(&buf_ctrl
->tx_get
);
1037 tx_put
= readl(&buf_ctrl
->tx_put
);
1038 tx_bufsize
= readl(&buf_ctrl
->tx_bufsize
);
1039 tx_bufaddr
= readl(&buf_ctrl
->tx_bufaddr
);
1040 if (tx_put
>= tx_get
)
1041 char_count
= tx_get
- tx_put
- 1 + tx_bufsize
;
1043 char_count
= tx_get
- tx_put
- 1;
1050 if (info
->x_char
) { /* send special char */
1051 data
= info
->x_char
;
1053 cy_writeb(cinfo
->base_addr
+ tx_bufaddr
+ tx_put
, data
);
1054 tx_put
= (tx_put
+ 1) & (tx_bufsize
- 1);
1060 while (0 < (small_count
= min_t(unsigned int,
1061 tx_bufsize
- tx_put
, min_t(unsigned int,
1062 (SERIAL_XMIT_SIZE
- info
->xmit_tail
),
1063 min_t(unsigned int, info
->xmit_cnt
,
1066 memcpy_toio((char *)(cinfo
->base_addr
+ tx_bufaddr
+
1068 &info
->port
.xmit_buf
[info
->xmit_tail
],
1071 tx_put
= (tx_put
+ small_count
) & (tx_bufsize
- 1);
1072 char_count
-= small_count
;
1073 info
->icount
.tx
+= small_count
;
1074 info
->xmit_cnt
-= small_count
;
1075 info
->xmit_tail
= (info
->xmit_tail
+ small_count
) &
1076 (SERIAL_XMIT_SIZE
- 1);
1079 while (info
->xmit_cnt
&& char_count
) {
1080 data
= info
->port
.xmit_buf
[info
->xmit_tail
];
1082 info
->xmit_tail
= (info
->xmit_tail
+ 1) &
1083 (SERIAL_XMIT_SIZE
- 1);
1085 cy_writeb(cinfo
->base_addr
+ tx_bufaddr
+ tx_put
, data
);
1086 tx_put
= (tx_put
+ 1) & (tx_bufsize
- 1);
1094 cy_writel(&buf_ctrl
->tx_put
, tx_put
);
1098 static void cyz_handle_cmd(struct cyclades_card
*cinfo
)
1100 struct BOARD_CTRL __iomem
*board_ctrl
= cinfo
->board_ctrl
;
1101 struct tty_struct
*tty
;
1102 struct cyclades_port
*info
;
1103 __u32 channel
, param
, fw_ver
;
1108 fw_ver
= readl(&board_ctrl
->fw_version
);
1110 while (cyz_fetch_msg(cinfo
, &channel
, &cmd
, ¶m
) == 1) {
1113 info
= &cinfo
->ports
[channel
];
1114 tty
= tty_port_tty_get(&info
->port
);
1120 tty_insert_flip_char(tty
, 0, TTY_PARITY
);
1125 tty_insert_flip_char(tty
, 0, TTY_FRAME
);
1130 tty_insert_flip_char(tty
, 0, TTY_BREAK
);
1137 if (info
->port
.flags
& ASYNC_CHECK_CD
) {
1138 u32 dcd
= fw_ver
> 241 ? param
:
1139 readl(&info
->u
.cyz
.ch_ctrl
->rs_status
);
1141 wake_up_interruptible(&info
->port
.open_wait
);
1160 complete(&info
->shutdown_wait
);
1163 #ifdef CONFIG_CYZ_INTR
1167 /* Reception Interrupt */
1168 #ifdef CY_DEBUG_INTERRUPTS
1169 printk(KERN_DEBUG
"cyz_interrupt: rcvd intr, card %d, "
1170 "port %ld\n", info
->card
, channel
);
1172 cyz_handle_rx(info
, tty
);
1177 /* Transmission Interrupt */
1178 #ifdef CY_DEBUG_INTERRUPTS
1179 printk(KERN_DEBUG
"cyz_interrupt: xmit intr, card %d, "
1180 "port %ld\n", info
->card
, channel
);
1182 cyz_handle_tx(info
, tty
);
1184 #endif /* CONFIG_CYZ_INTR */
1186 /* should do something with this !!! */
1192 wake_up_interruptible(&info
->port
.delta_msr_wait
);
1194 tty_schedule_flip(tty
);
1199 #ifdef CONFIG_CYZ_INTR
1200 static irqreturn_t
cyz_interrupt(int irq
, void *dev_id
)
1202 struct cyclades_card
*cinfo
= dev_id
;
1204 if (unlikely(!cyz_is_loaded(cinfo
))) {
1205 #ifdef CY_DEBUG_INTERRUPTS
1206 printk(KERN_DEBUG
"cyz_interrupt: board not yet loaded "
1212 /* Handle the interrupts */
1213 cyz_handle_cmd(cinfo
);
1216 } /* cyz_interrupt */
1218 static void cyz_rx_restart(unsigned long arg
)
1220 struct cyclades_port
*info
= (struct cyclades_port
*)arg
;
1221 struct cyclades_card
*card
= info
->card
;
1223 __u32 channel
= info
->line
- card
->first_line
;
1224 unsigned long flags
;
1226 spin_lock_irqsave(&card
->card_lock
, flags
);
1227 retval
= cyz_issue_cmd(card
, channel
, C_CM_INTBACK2
, 0L);
1229 printk(KERN_ERR
"cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1230 info
->line
, retval
);
1232 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1235 #else /* CONFIG_CYZ_INTR */
1237 static void cyz_poll(unsigned long arg
)
1239 struct cyclades_card
*cinfo
;
1240 struct cyclades_port
*info
;
1241 unsigned long expires
= jiffies
+ HZ
;
1242 unsigned int port
, card
;
1244 for (card
= 0; card
< NR_CARDS
; card
++) {
1245 cinfo
= &cy_card
[card
];
1247 if (!cy_is_Z(cinfo
))
1249 if (!cyz_is_loaded(cinfo
))
1252 /* Skip first polling cycle to avoid racing conditions with the FW */
1253 if (!cinfo
->intr_enabled
) {
1254 cinfo
->intr_enabled
= 1;
1258 cyz_handle_cmd(cinfo
);
1260 for (port
= 0; port
< cinfo
->nports
; port
++) {
1261 struct tty_struct
*tty
;
1263 info
= &cinfo
->ports
[port
];
1264 tty
= tty_port_tty_get(&info
->port
);
1265 /* OK to pass NULL to the handle functions below.
1266 They need to drop the data in that case. */
1268 if (!info
->throttle
)
1269 cyz_handle_rx(info
, tty
);
1270 cyz_handle_tx(info
, tty
);
1273 /* poll every 'cyz_polling_cycle' period */
1274 expires
= jiffies
+ cyz_polling_cycle
;
1276 mod_timer(&cyz_timerlist
, expires
);
1279 #endif /* CONFIG_CYZ_INTR */
1281 /********** End of block of Cyclades-Z specific code *********/
1282 /***********************************************************/
1284 /* This is called whenever a port becomes active;
1285 interrupts are enabled and DTR & RTS are turned on.
1287 static int cy_startup(struct cyclades_port
*info
, struct tty_struct
*tty
)
1289 struct cyclades_card
*card
;
1290 unsigned long flags
;
1296 channel
= info
->line
- card
->first_line
;
1298 page
= get_zeroed_page(GFP_KERNEL
);
1302 spin_lock_irqsave(&card
->card_lock
, flags
);
1304 if (info
->port
.flags
& ASYNC_INITIALIZED
)
1308 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1312 if (info
->port
.xmit_buf
)
1315 info
->port
.xmit_buf
= (unsigned char *)page
;
1317 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1319 cy_set_line_char(info
, tty
);
1321 if (!cy_is_Z(card
)) {
1324 spin_lock_irqsave(&card
->card_lock
, flags
);
1326 cyy_writeb(info
, CyCAR
, channel
);
1328 cyy_writeb(info
, CyRTPR
,
1329 (info
->default_timeout
? info
->default_timeout
: 0x02));
1330 /* 10ms rx timeout */
1332 cyy_issue_cmd(info
, CyCHAN_CTL
| CyENB_RCVR
| CyENB_XMTR
);
1334 cyy_change_rts_dtr(info
, TIOCM_RTS
| TIOCM_DTR
, 0);
1336 cyy_writeb(info
, CySRER
, cyy_readb(info
, CySRER
) | CyRxData
);
1338 struct CH_CTRL __iomem
*ch_ctrl
= info
->u
.cyz
.ch_ctrl
;
1340 if (!cyz_is_loaded(card
))
1343 #ifdef CY_DEBUG_OPEN
1344 printk(KERN_DEBUG
"cyc startup Z card %d, channel %d, "
1345 "base_addr %p\n", card
, channel
, card
->base_addr
);
1347 spin_lock_irqsave(&card
->card_lock
, flags
);
1349 cy_writel(&ch_ctrl
->op_mode
, C_CH_ENABLE
);
1351 #ifdef CONFIG_CYZ_INTR
1352 cy_writel(&ch_ctrl
->intr_enable
,
1353 C_IN_TXBEMPTY
| C_IN_TXLOWWM
| C_IN_RXHIWM
|
1354 C_IN_RXNNDT
| C_IN_IOCTLW
| C_IN_MDCD
);
1356 cy_writel(&ch_ctrl
->intr_enable
,
1357 C_IN_IOCTLW
| C_IN_MDCD
);
1358 #endif /* CONFIG_CYZ_INTR */
1360 #ifdef CONFIG_CYZ_INTR
1361 cy_writel(&ch_ctrl
->intr_enable
,
1362 C_IN_TXBEMPTY
| C_IN_TXLOWWM
| C_IN_RXHIWM
|
1363 C_IN_RXNNDT
| C_IN_MDCD
);
1365 cy_writel(&ch_ctrl
->intr_enable
, C_IN_MDCD
);
1366 #endif /* CONFIG_CYZ_INTR */
1369 retval
= cyz_issue_cmd(card
, channel
, C_CM_IOCTL
, 0L);
1371 printk(KERN_ERR
"cyc:startup(1) retval on ttyC%d was "
1372 "%x\n", info
->line
, retval
);
1375 /* Flush RX buffers before raising DTR and RTS */
1376 retval
= cyz_issue_cmd(card
, channel
, C_CM_FLUSH_RX
, 0L);
1378 printk(KERN_ERR
"cyc:startup(2) retval on ttyC%d was "
1379 "%x\n", info
->line
, retval
);
1382 /* set timeout !!! */
1383 /* set RTS and DTR !!! */
1384 tty_port_raise_dtr_rts(&info
->port
);
1386 /* enable send, recv, modem !!! */
1389 info
->port
.flags
|= ASYNC_INITIALIZED
;
1391 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
1392 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1393 info
->breakon
= info
->breakoff
= 0;
1394 memset((char *)&info
->idle_stats
, 0, sizeof(info
->idle_stats
));
1395 info
->idle_stats
.in_use
=
1396 info
->idle_stats
.recv_idle
=
1397 info
->idle_stats
.xmit_idle
= jiffies
;
1399 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1401 #ifdef CY_DEBUG_OPEN
1402 printk(KERN_DEBUG
"cyc startup done\n");
1407 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1412 static void start_xmit(struct cyclades_port
*info
)
1414 struct cyclades_card
*card
= info
->card
;
1415 unsigned long flags
;
1416 int channel
= info
->line
- card
->first_line
;
1418 if (!cy_is_Z(card
)) {
1419 spin_lock_irqsave(&card
->card_lock
, flags
);
1420 cyy_writeb(info
, CyCAR
, channel
& 0x03);
1421 cyy_writeb(info
, CySRER
, cyy_readb(info
, CySRER
) | CyTxRdy
);
1422 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1424 #ifdef CONFIG_CYZ_INTR
1427 spin_lock_irqsave(&card
->card_lock
, flags
);
1428 retval
= cyz_issue_cmd(card
, channel
, C_CM_INTBACK
, 0L);
1430 printk(KERN_ERR
"cyc:start_xmit retval on ttyC%d was "
1431 "%x\n", info
->line
, retval
);
1433 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1434 #else /* CONFIG_CYZ_INTR */
1435 /* Don't have to do anything at this time */
1436 #endif /* CONFIG_CYZ_INTR */
1441 * This routine shuts down a serial port; interrupts are disabled,
1442 * and DTR is dropped if the hangup on close termio flag is on.
1444 static void cy_shutdown(struct cyclades_port
*info
, struct tty_struct
*tty
)
1446 struct cyclades_card
*card
;
1447 unsigned long flags
;
1450 if (!(info
->port
.flags
& ASYNC_INITIALIZED
))
1454 channel
= info
->line
- card
->first_line
;
1455 if (!cy_is_Z(card
)) {
1456 spin_lock_irqsave(&card
->card_lock
, flags
);
1458 /* Clear delta_msr_wait queue to avoid mem leaks. */
1459 wake_up_interruptible(&info
->port
.delta_msr_wait
);
1461 if (info
->port
.xmit_buf
) {
1462 unsigned char *temp
;
1463 temp
= info
->port
.xmit_buf
;
1464 info
->port
.xmit_buf
= NULL
;
1465 free_page((unsigned long)temp
);
1467 if (tty
->termios
->c_cflag
& HUPCL
)
1468 cyy_change_rts_dtr(info
, 0, TIOCM_RTS
| TIOCM_DTR
);
1470 cyy_issue_cmd(info
, CyCHAN_CTL
| CyDIS_RCVR
);
1471 /* it may be appropriate to clear _XMIT at
1472 some later date (after testing)!!! */
1474 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1475 info
->port
.flags
&= ~ASYNC_INITIALIZED
;
1476 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1478 #ifdef CY_DEBUG_OPEN
1479 printk(KERN_DEBUG
"cyc shutdown Z card %d, channel %d, "
1480 "base_addr %p\n", card
, channel
, card
->base_addr
);
1483 if (!cyz_is_loaded(card
))
1486 spin_lock_irqsave(&card
->card_lock
, flags
);
1488 if (info
->port
.xmit_buf
) {
1489 unsigned char *temp
;
1490 temp
= info
->port
.xmit_buf
;
1491 info
->port
.xmit_buf
= NULL
;
1492 free_page((unsigned long)temp
);
1495 if (tty
->termios
->c_cflag
& HUPCL
)
1496 tty_port_lower_dtr_rts(&info
->port
);
1498 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1499 info
->port
.flags
&= ~ASYNC_INITIALIZED
;
1501 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1504 #ifdef CY_DEBUG_OPEN
1505 printk(KERN_DEBUG
"cyc shutdown done\n");
1510 * ------------------------------------------------------------
1511 * cy_open() and friends
1512 * ------------------------------------------------------------
1516 * This routine is called whenever a serial port is opened. It
1517 * performs the serial-specific initialization for the tty structure.
1519 static int cy_open(struct tty_struct
*tty
, struct file
*filp
)
1521 struct cyclades_port
*info
;
1522 unsigned int i
, line
;
1526 if (tty
->index
< 0 || NR_PORTS
<= line
)
1529 for (i
= 0; i
< NR_CARDS
; i
++)
1530 if (line
< cy_card
[i
].first_line
+ cy_card
[i
].nports
&&
1531 line
>= cy_card
[i
].first_line
)
1535 info
= &cy_card
[i
].ports
[line
- cy_card
[i
].first_line
];
1539 /* If the card's firmware hasn't been loaded,
1540 treat it as absent from the system. This
1541 will make the user pay attention.
1543 if (cy_is_Z(info
->card
)) {
1544 struct cyclades_card
*cinfo
= info
->card
;
1545 struct FIRM_ID __iomem
*firm_id
= cinfo
->base_addr
+ ID_ADDRESS
;
1547 if (!cyz_is_loaded(cinfo
)) {
1548 if (cinfo
->hw_ver
== ZE_V1
&& cyz_fpga_loaded(cinfo
) &&
1549 readl(&firm_id
->signature
) ==
1551 printk(KERN_ERR
"cyc:Cyclades-Z Error: you "
1552 "need an external power supply for "
1553 "this number of ports.\nFirmware "
1556 printk(KERN_ERR
"cyc:Cyclades-Z firmware not "
1561 #ifdef CONFIG_CYZ_INTR
1563 /* In case this Z board is operating in interrupt mode, its
1564 interrupts should be enabled as soon as the first open
1565 happens to one of its ports. */
1566 if (!cinfo
->intr_enabled
) {
1569 /* Enable interrupts on the PLX chip */
1570 intr
= readw(&cinfo
->ctl_addr
.p9060
->
1571 intr_ctrl_stat
) | 0x0900;
1572 cy_writew(&cinfo
->ctl_addr
.p9060
->
1573 intr_ctrl_stat
, intr
);
1574 /* Enable interrupts on the FW */
1575 retval
= cyz_issue_cmd(cinfo
, 0,
1578 printk(KERN_ERR
"cyc:IRQ enable retval "
1579 "was %x\n", retval
);
1581 cinfo
->intr_enabled
= 1;
1584 #endif /* CONFIG_CYZ_INTR */
1585 /* Make sure this Z port really exists in hardware */
1586 if (info
->line
> (cinfo
->first_line
+ cinfo
->nports
- 1))
1589 #ifdef CY_DEBUG_OTHER
1590 printk(KERN_DEBUG
"cyc:cy_open ttyC%d\n", info
->line
);
1592 tty
->driver_data
= info
;
1593 if (serial_paranoia_check(info
, tty
->name
, "cy_open"))
1596 #ifdef CY_DEBUG_OPEN
1597 printk(KERN_DEBUG
"cyc:cy_open ttyC%d, count = %d\n", info
->line
,
1601 #ifdef CY_DEBUG_COUNT
1602 printk(KERN_DEBUG
"cyc:cy_open (%d): incrementing count to %d\n",
1603 current
->pid
, info
->port
.count
);
1607 * If the port is the middle of closing, bail out now
1609 if (tty_hung_up_p(filp
) || (info
->port
.flags
& ASYNC_CLOSING
)) {
1610 wait_event_interruptible(info
->port
.close_wait
,
1611 !(info
->port
.flags
& ASYNC_CLOSING
));
1612 return (info
->port
.flags
& ASYNC_HUP_NOTIFY
) ? -EAGAIN
: -ERESTARTSYS
;
1616 * Start up serial port
1618 retval
= cy_startup(info
, tty
);
1622 retval
= tty_port_block_til_ready(&info
->port
, tty
, filp
);
1624 #ifdef CY_DEBUG_OPEN
1625 printk(KERN_DEBUG
"cyc:cy_open returning after block_til_ready "
1626 "with %d\n", retval
);
1632 tty_port_tty_set(&info
->port
, tty
);
1634 #ifdef CY_DEBUG_OPEN
1635 printk(KERN_DEBUG
"cyc:cy_open done\n");
1641 * cy_wait_until_sent() --- wait until the transmitter is empty
1643 static void cy_wait_until_sent(struct tty_struct
*tty
, int timeout
)
1645 struct cyclades_card
*card
;
1646 struct cyclades_port
*info
= tty
->driver_data
;
1647 unsigned long orig_jiffies
;
1650 if (serial_paranoia_check(info
, tty
->name
, "cy_wait_until_sent"))
1653 if (info
->xmit_fifo_size
== 0)
1654 return; /* Just in case.... */
1656 orig_jiffies
= jiffies
;
1659 * Set the check interval to be 1/5 of the estimated time to
1660 * send a single character, and make it at least 1. The check
1661 * interval should also be less than the timeout.
1663 * Note: we have to use pretty tight timings here to satisfy
1666 char_time
= (info
->timeout
- HZ
/ 50) / info
->xmit_fifo_size
;
1667 char_time
= char_time
/ 5;
1673 char_time
= min(char_time
, timeout
);
1675 * If the transmitter hasn't cleared in twice the approximate
1676 * amount of time to send the entire FIFO, it probably won't
1677 * ever clear. This assumes the UART isn't doing flow
1678 * control, which is currently the case. Hence, if it ever
1679 * takes longer than info->timeout, this is probably due to a
1680 * UART bug of some kind. So, we clamp the timeout parameter at
1683 if (!timeout
|| timeout
> 2 * info
->timeout
)
1684 timeout
= 2 * info
->timeout
;
1685 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
1686 printk(KERN_DEBUG
"In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
1687 timeout
, char_time
, jiffies
);
1690 if (!cy_is_Z(card
)) {
1691 while (cyy_readb(info
, CySRER
) & CyTxRdy
) {
1692 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
1693 printk(KERN_DEBUG
"Not clean (jiff=%lu)...", jiffies
);
1695 if (msleep_interruptible(jiffies_to_msecs(char_time
)))
1697 if (timeout
&& time_after(jiffies
, orig_jiffies
+
1702 /* Run one more char cycle */
1703 msleep_interruptible(jiffies_to_msecs(char_time
* 5));
1705 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
1706 printk(KERN_DEBUG
"Clean (jiff=%lu)...done\n", jiffies
);
1710 static void cy_flush_buffer(struct tty_struct
*tty
)
1712 struct cyclades_port
*info
= tty
->driver_data
;
1713 struct cyclades_card
*card
;
1714 int channel
, retval
;
1715 unsigned long flags
;
1718 printk(KERN_DEBUG
"cyc:cy_flush_buffer ttyC%d\n", info
->line
);
1721 if (serial_paranoia_check(info
, tty
->name
, "cy_flush_buffer"))
1725 channel
= info
->line
- card
->first_line
;
1727 spin_lock_irqsave(&card
->card_lock
, flags
);
1728 info
->xmit_cnt
= info
->xmit_head
= info
->xmit_tail
= 0;
1729 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1731 if (cy_is_Z(card
)) { /* If it is a Z card, flush the on-board
1733 spin_lock_irqsave(&card
->card_lock
, flags
);
1734 retval
= cyz_issue_cmd(card
, channel
, C_CM_FLUSH_TX
, 0L);
1736 printk(KERN_ERR
"cyc: flush_buffer retval on ttyC%d "
1737 "was %x\n", info
->line
, retval
);
1739 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1742 } /* cy_flush_buffer */
1745 static void cy_do_close(struct tty_port
*port
)
1747 struct cyclades_port
*info
= container_of(port
, struct cyclades_port
,
1749 struct cyclades_card
*card
;
1750 unsigned long flags
;
1754 channel
= info
->line
- card
->first_line
;
1755 spin_lock_irqsave(&card
->card_lock
, flags
);
1757 if (!cy_is_Z(card
)) {
1758 /* Stop accepting input */
1759 cyy_writeb(info
, CyCAR
, channel
& 0x03);
1760 cyy_writeb(info
, CySRER
, cyy_readb(info
, CySRER
) & ~CyRxData
);
1761 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
1762 /* Waiting for on-board buffers to be empty before
1764 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1765 cy_wait_until_sent(port
->tty
, info
->timeout
);
1766 spin_lock_irqsave(&card
->card_lock
, flags
);
1770 /* Waiting for on-board buffers to be empty before closing
1772 struct CH_CTRL __iomem
*ch_ctrl
= info
->u
.cyz
.ch_ctrl
;
1775 if (readl(&ch_ctrl
->flow_status
) != C_FS_TXIDLE
) {
1776 retval
= cyz_issue_cmd(card
, channel
, C_CM_IOCTLW
, 0L);
1778 printk(KERN_DEBUG
"cyc:cy_close retval on "
1779 "ttyC%d was %x\n", info
->line
, retval
);
1781 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1782 wait_for_completion_interruptible(&info
->shutdown_wait
);
1783 spin_lock_irqsave(&card
->card_lock
, flags
);
1787 spin_unlock_irqrestore(&card
->card_lock
, flags
);
1788 cy_shutdown(info
, port
->tty
);
1792 * This routine is called when a particular tty device is closed.
1794 static void cy_close(struct tty_struct
*tty
, struct file
*filp
)
1796 struct cyclades_port
*info
= tty
->driver_data
;
1797 if (!info
|| serial_paranoia_check(info
, tty
->name
, "cy_close"))
1799 tty_port_close(&info
->port
, tty
, filp
);
1802 /* This routine gets called when tty_write has put something into
1803 * the write_queue. The characters may come from user space or
1806 * This routine will return the number of characters actually
1807 * accepted for writing.
1809 * If the port is not already transmitting stuff, start it off by
1810 * enabling interrupts. The interrupt service routine will then
1811 * ensure that the characters are sent.
1812 * If the port is already active, there is no need to kick it.
1815 static int cy_write(struct tty_struct
*tty
, const unsigned char *buf
, int count
)
1817 struct cyclades_port
*info
= tty
->driver_data
;
1818 unsigned long flags
;
1822 printk(KERN_DEBUG
"cyc:cy_write ttyC%d\n", info
->line
);
1825 if (serial_paranoia_check(info
, tty
->name
, "cy_write"))
1828 if (!info
->port
.xmit_buf
)
1831 spin_lock_irqsave(&info
->card
->card_lock
, flags
);
1833 c
= min(count
, (int)(SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1));
1834 c
= min(c
, (int)(SERIAL_XMIT_SIZE
- info
->xmit_head
));
1839 memcpy(info
->port
.xmit_buf
+ info
->xmit_head
, buf
, c
);
1840 info
->xmit_head
= (info
->xmit_head
+ c
) &
1841 (SERIAL_XMIT_SIZE
- 1);
1842 info
->xmit_cnt
+= c
;
1847 spin_unlock_irqrestore(&info
->card
->card_lock
, flags
);
1849 info
->idle_stats
.xmit_bytes
+= ret
;
1850 info
->idle_stats
.xmit_idle
= jiffies
;
1852 if (info
->xmit_cnt
&& !tty
->stopped
&& !tty
->hw_stopped
)
1859 * This routine is called by the kernel to write a single
1860 * character to the tty device. If the kernel uses this routine,
1861 * it must call the flush_chars() routine (if defined) when it is
1862 * done stuffing characters into the driver. If there is no room
1863 * in the queue, the character is ignored.
1865 static int cy_put_char(struct tty_struct
*tty
, unsigned char ch
)
1867 struct cyclades_port
*info
= tty
->driver_data
;
1868 unsigned long flags
;
1871 printk(KERN_DEBUG
"cyc:cy_put_char ttyC%d\n", info
->line
);
1874 if (serial_paranoia_check(info
, tty
->name
, "cy_put_char"))
1877 if (!info
->port
.xmit_buf
)
1880 spin_lock_irqsave(&info
->card
->card_lock
, flags
);
1881 if (info
->xmit_cnt
>= (int)(SERIAL_XMIT_SIZE
- 1)) {
1882 spin_unlock_irqrestore(&info
->card
->card_lock
, flags
);
1886 info
->port
.xmit_buf
[info
->xmit_head
++] = ch
;
1887 info
->xmit_head
&= SERIAL_XMIT_SIZE
- 1;
1889 info
->idle_stats
.xmit_bytes
++;
1890 info
->idle_stats
.xmit_idle
= jiffies
;
1891 spin_unlock_irqrestore(&info
->card
->card_lock
, flags
);
1896 * This routine is called by the kernel after it has written a
1897 * series of characters to the tty device using put_char().
1899 static void cy_flush_chars(struct tty_struct
*tty
)
1901 struct cyclades_port
*info
= tty
->driver_data
;
1904 printk(KERN_DEBUG
"cyc:cy_flush_chars ttyC%d\n", info
->line
);
1907 if (serial_paranoia_check(info
, tty
->name
, "cy_flush_chars"))
1910 if (info
->xmit_cnt
<= 0 || tty
->stopped
|| tty
->hw_stopped
||
1911 !info
->port
.xmit_buf
)
1915 } /* cy_flush_chars */
1918 * This routine returns the numbers of characters the tty driver
1919 * will accept for queuing to be written. This number is subject
1920 * to change as output buffers get emptied, or if the output flow
1921 * control is activated.
1923 static int cy_write_room(struct tty_struct
*tty
)
1925 struct cyclades_port
*info
= tty
->driver_data
;
1929 printk(KERN_DEBUG
"cyc:cy_write_room ttyC%d\n", info
->line
);
1932 if (serial_paranoia_check(info
, tty
->name
, "cy_write_room"))
1934 ret
= SERIAL_XMIT_SIZE
- info
->xmit_cnt
- 1;
1938 } /* cy_write_room */
1940 static int cy_chars_in_buffer(struct tty_struct
*tty
)
1942 struct cyclades_port
*info
= tty
->driver_data
;
1944 if (serial_paranoia_check(info
, tty
->name
, "cy_chars_in_buffer"))
1947 #ifdef Z_EXT_CHARS_IN_BUFFER
1948 if (!cy_is_Z(info
->card
)) {
1949 #endif /* Z_EXT_CHARS_IN_BUFFER */
1951 printk(KERN_DEBUG
"cyc:cy_chars_in_buffer ttyC%d %d\n",
1952 info
->line
, info
->xmit_cnt
);
1954 return info
->xmit_cnt
;
1955 #ifdef Z_EXT_CHARS_IN_BUFFER
1957 struct BUF_CTRL __iomem
*buf_ctrl
= info
->u
.cyz
.buf_ctrl
;
1959 __u32 tx_put
, tx_get
, tx_bufsize
;
1962 tx_get
= readl(&buf_ctrl
->tx_get
);
1963 tx_put
= readl(&buf_ctrl
->tx_put
);
1964 tx_bufsize
= readl(&buf_ctrl
->tx_bufsize
);
1965 if (tx_put
>= tx_get
)
1966 char_count
= tx_put
- tx_get
;
1968 char_count
= tx_put
- tx_get
+ tx_bufsize
;
1970 printk(KERN_DEBUG
"cyc:cy_chars_in_buffer ttyC%d %d\n",
1971 info
->line
, info
->xmit_cnt
+ char_count
);
1974 return info
->xmit_cnt
+ char_count
;
1976 #endif /* Z_EXT_CHARS_IN_BUFFER */
1977 } /* cy_chars_in_buffer */
1980 * ------------------------------------------------------------
1981 * cy_ioctl() and friends
1982 * ------------------------------------------------------------
1985 static void cyy_baud_calc(struct cyclades_port
*info
, __u32 baud
)
1987 int co
, co_val
, bpr
;
1988 __u32 cy_clock
= ((info
->chip_rev
>= CD1400_REV_J
) ? 60000000 :
1992 info
->tbpr
= info
->tco
= info
->rbpr
= info
->rco
= 0;
1996 /* determine which prescaler to use */
1997 for (co
= 4, co_val
= 2048; co
; co
--, co_val
>>= 2) {
1998 if (cy_clock
/ co_val
/ baud
> 63)
2002 bpr
= (cy_clock
/ co_val
* 2 / baud
+ 1) / 2;
2006 info
->tbpr
= info
->rbpr
= bpr
;
2007 info
->tco
= info
->rco
= co
;
2011 * This routine finds or computes the various line characteristics.
2012 * It used to be called config_setup
2014 static void cy_set_line_char(struct cyclades_port
*info
, struct tty_struct
*tty
)
2016 struct cyclades_card
*card
;
2017 unsigned long flags
;
2019 unsigned cflag
, iflag
;
2020 int baud
, baud_rate
= 0;
2023 if (!tty
->termios
) /* XXX can this happen at all? */
2026 if (info
->line
== -1)
2029 cflag
= tty
->termios
->c_cflag
;
2030 iflag
= tty
->termios
->c_iflag
;
2033 * Set up the tty->alt_speed kludge
2035 if ((info
->port
.flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_HI
)
2036 tty
->alt_speed
= 57600;
2037 if ((info
->port
.flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_VHI
)
2038 tty
->alt_speed
= 115200;
2039 if ((info
->port
.flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_SHI
)
2040 tty
->alt_speed
= 230400;
2041 if ((info
->port
.flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_WARP
)
2042 tty
->alt_speed
= 460800;
2045 channel
= info
->line
- card
->first_line
;
2047 if (!cy_is_Z(card
)) {
2051 baud
= tty_get_baud_rate(tty
);
2052 if (baud
== 38400 && (info
->port
.flags
& ASYNC_SPD_MASK
) ==
2054 if (info
->custom_divisor
)
2055 baud_rate
= info
->baud
/ info
->custom_divisor
;
2057 baud_rate
= info
->baud
;
2058 } else if (baud
> CD1400_MAX_SPEED
) {
2059 baud
= CD1400_MAX_SPEED
;
2061 /* find the baud index */
2062 for (i
= 0; i
< 20; i
++) {
2063 if (baud
== baud_table
[i
])
2067 i
= 19; /* CD1400_MAX_SPEED */
2069 if (baud
== 38400 && (info
->port
.flags
& ASYNC_SPD_MASK
) ==
2071 cyy_baud_calc(info
, baud_rate
);
2073 if (info
->chip_rev
>= CD1400_REV_J
) {
2074 /* It is a CD1400 rev. J or later */
2075 info
->tbpr
= baud_bpr_60
[i
]; /* Tx BPR */
2076 info
->tco
= baud_co_60
[i
]; /* Tx CO */
2077 info
->rbpr
= baud_bpr_60
[i
]; /* Rx BPR */
2078 info
->rco
= baud_co_60
[i
]; /* Rx CO */
2080 info
->tbpr
= baud_bpr_25
[i
]; /* Tx BPR */
2081 info
->tco
= baud_co_25
[i
]; /* Tx CO */
2082 info
->rbpr
= baud_bpr_25
[i
]; /* Rx BPR */
2083 info
->rco
= baud_co_25
[i
]; /* Rx CO */
2086 if (baud_table
[i
] == 134) {
2087 /* get it right for 134.5 baud */
2088 info
->timeout
= (info
->xmit_fifo_size
* HZ
* 30 / 269) +
2090 } else if (baud
== 38400 && (info
->port
.flags
& ASYNC_SPD_MASK
) ==
2092 info
->timeout
= (info
->xmit_fifo_size
* HZ
* 15 /
2094 } else if (baud_table
[i
]) {
2095 info
->timeout
= (info
->xmit_fifo_size
* HZ
* 15 /
2097 /* this needs to be propagated into the card info */
2101 /* By tradition (is it a standard?) a baud rate of zero
2102 implies the line should be/has been closed. A bit
2103 later in this routine such a test is performed. */
2105 /* byte size and parity */
2108 /* receive threshold */
2109 info
->cor3
= (info
->default_threshold
?
2110 info
->default_threshold
: baud_cor3
[i
]);
2112 switch (cflag
& CSIZE
) {
2114 info
->cor1
= Cy_5_BITS
;
2117 info
->cor1
= Cy_6_BITS
;
2120 info
->cor1
= Cy_7_BITS
;
2123 info
->cor1
= Cy_8_BITS
;
2127 info
->cor1
|= Cy_2_STOP
;
2129 if (cflag
& PARENB
) {
2131 info
->cor1
|= CyPARITY_O
;
2133 info
->cor1
|= CyPARITY_E
;
2135 info
->cor1
|= CyPARITY_NONE
;
2137 /* CTS flow control flag */
2138 if (cflag
& CRTSCTS
) {
2139 info
->port
.flags
|= ASYNC_CTS_FLOW
;
2140 info
->cor2
|= CyCtsAE
;
2142 info
->port
.flags
&= ~ASYNC_CTS_FLOW
;
2143 info
->cor2
&= ~CyCtsAE
;
2146 info
->port
.flags
&= ~ASYNC_CHECK_CD
;
2148 info
->port
.flags
|= ASYNC_CHECK_CD
;
2150 /***********************************************
2151 The hardware option, CyRtsAO, presents RTS when
2152 the chip has characters to send. Since most modems
2153 use RTS as reverse (inbound) flow control, this
2154 option is not used. If inbound flow control is
2155 necessary, DTR can be programmed to provide the
2156 appropriate signals for use with a non-standard
2157 cable. Contact Marcio Saito for details.
2158 ***********************************************/
2162 spin_lock_irqsave(&card
->card_lock
, flags
);
2163 cyy_writeb(info
, CyCAR
, channel
);
2165 /* tx and rx baud rate */
2167 cyy_writeb(info
, CyTCOR
, info
->tco
);
2168 cyy_writeb(info
, CyTBPR
, info
->tbpr
);
2169 cyy_writeb(info
, CyRCOR
, info
->rco
);
2170 cyy_writeb(info
, CyRBPR
, info
->rbpr
);
2172 /* set line characteristics according configuration */
2174 cyy_writeb(info
, CySCHR1
, START_CHAR(tty
));
2175 cyy_writeb(info
, CySCHR2
, STOP_CHAR(tty
));
2176 cyy_writeb(info
, CyCOR1
, info
->cor1
);
2177 cyy_writeb(info
, CyCOR2
, info
->cor2
);
2178 cyy_writeb(info
, CyCOR3
, info
->cor3
);
2179 cyy_writeb(info
, CyCOR4
, info
->cor4
);
2180 cyy_writeb(info
, CyCOR5
, info
->cor5
);
2182 cyy_issue_cmd(info
, CyCOR_CHANGE
| CyCOR1ch
| CyCOR2ch
|
2185 /* !!! Is this needed? */
2186 cyy_writeb(info
, CyCAR
, channel
);
2187 cyy_writeb(info
, CyRTPR
,
2188 (info
->default_timeout
? info
->default_timeout
: 0x02));
2189 /* 10ms rx timeout */
2193 cflags
|= CyDSR
| CyRI
| CyDCD
;
2194 /* without modem intr */
2195 cyy_writeb(info
, CySRER
, cyy_readb(info
, CySRER
) | CyMdmCh
);
2196 /* act on 1->0 modem transitions */
2197 if ((cflag
& CRTSCTS
) && info
->rflow
)
2198 cyy_writeb(info
, CyMCOR1
, cflags
| rflow_thr
[i
]);
2200 cyy_writeb(info
, CyMCOR1
, cflags
);
2201 /* act on 0->1 modem transitions */
2202 cyy_writeb(info
, CyMCOR2
, cflags
);
2204 if (i
== 0) /* baud rate is zero, turn off line */
2205 cyy_change_rts_dtr(info
, 0, TIOCM_DTR
);
2207 cyy_change_rts_dtr(info
, TIOCM_DTR
, 0);
2209 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
2210 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2213 struct CH_CTRL __iomem
*ch_ctrl
= info
->u
.cyz
.ch_ctrl
;
2217 if (!cyz_is_loaded(card
))
2221 baud
= tty_get_baud_rate(tty
);
2222 if (baud
== 38400 && (info
->port
.flags
& ASYNC_SPD_MASK
) ==
2224 if (info
->custom_divisor
)
2225 baud_rate
= info
->baud
/ info
->custom_divisor
;
2227 baud_rate
= info
->baud
;
2228 } else if (baud
> CYZ_MAX_SPEED
) {
2229 baud
= CYZ_MAX_SPEED
;
2231 cy_writel(&ch_ctrl
->comm_baud
, baud
);
2234 /* get it right for 134.5 baud */
2235 info
->timeout
= (info
->xmit_fifo_size
* HZ
* 30 / 269) +
2237 } else if (baud
== 38400 && (info
->port
.flags
& ASYNC_SPD_MASK
) ==
2239 info
->timeout
= (info
->xmit_fifo_size
* HZ
* 15 /
2242 info
->timeout
= (info
->xmit_fifo_size
* HZ
* 15 /
2244 /* this needs to be propagated into the card info */
2249 /* byte size and parity */
2250 switch (cflag
& CSIZE
) {
2252 cy_writel(&ch_ctrl
->comm_data_l
, C_DL_CS5
);
2255 cy_writel(&ch_ctrl
->comm_data_l
, C_DL_CS6
);
2258 cy_writel(&ch_ctrl
->comm_data_l
, C_DL_CS7
);
2261 cy_writel(&ch_ctrl
->comm_data_l
, C_DL_CS8
);
2264 if (cflag
& CSTOPB
) {
2265 cy_writel(&ch_ctrl
->comm_data_l
,
2266 readl(&ch_ctrl
->comm_data_l
) | C_DL_2STOP
);
2268 cy_writel(&ch_ctrl
->comm_data_l
,
2269 readl(&ch_ctrl
->comm_data_l
) | C_DL_1STOP
);
2271 if (cflag
& PARENB
) {
2273 cy_writel(&ch_ctrl
->comm_parity
, C_PR_ODD
);
2275 cy_writel(&ch_ctrl
->comm_parity
, C_PR_EVEN
);
2277 cy_writel(&ch_ctrl
->comm_parity
, C_PR_NONE
);
2279 /* CTS flow control flag */
2280 if (cflag
& CRTSCTS
) {
2281 cy_writel(&ch_ctrl
->hw_flow
,
2282 readl(&ch_ctrl
->hw_flow
) | C_RS_CTS
| C_RS_RTS
);
2284 cy_writel(&ch_ctrl
->hw_flow
, readl(&ch_ctrl
->hw_flow
) &
2285 ~(C_RS_CTS
| C_RS_RTS
));
2287 /* As the HW flow control is done in firmware, the driver
2288 doesn't need to care about it */
2289 info
->port
.flags
&= ~ASYNC_CTS_FLOW
;
2291 /* XON/XOFF/XANY flow control flags */
2294 sw_flow
|= C_FL_OXX
;
2296 sw_flow
|= C_FL_OIXANY
;
2298 cy_writel(&ch_ctrl
->sw_flow
, sw_flow
);
2300 retval
= cyz_issue_cmd(card
, channel
, C_CM_IOCTL
, 0L);
2302 printk(KERN_ERR
"cyc:set_line_char retval on ttyC%d "
2303 "was %x\n", info
->line
, retval
);
2306 /* CD sensitivity */
2308 info
->port
.flags
&= ~ASYNC_CHECK_CD
;
2310 info
->port
.flags
|= ASYNC_CHECK_CD
;
2312 if (baud
== 0) { /* baud rate is zero, turn off line */
2313 cy_writel(&ch_ctrl
->rs_control
,
2314 readl(&ch_ctrl
->rs_control
) & ~C_RS_DTR
);
2316 printk(KERN_DEBUG
"cyc:set_line_char dropping Z DTR\n");
2319 cy_writel(&ch_ctrl
->rs_control
,
2320 readl(&ch_ctrl
->rs_control
) | C_RS_DTR
);
2322 printk(KERN_DEBUG
"cyc:set_line_char raising Z DTR\n");
2326 retval
= cyz_issue_cmd(card
, channel
, C_CM_IOCTLM
, 0L);
2328 printk(KERN_ERR
"cyc:set_line_char(2) retval on ttyC%d "
2329 "was %x\n", info
->line
, retval
);
2332 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
2334 } /* set_line_char */
2336 static int cy_get_serial_info(struct cyclades_port
*info
,
2337 struct serial_struct __user
*retinfo
)
2339 struct cyclades_card
*cinfo
= info
->card
;
2340 struct serial_struct tmp
= {
2343 .port
= (info
->card
- cy_card
) * 0x100 + info
->line
-
2346 .flags
= info
->port
.flags
,
2347 .close_delay
= info
->port
.close_delay
,
2348 .closing_wait
= info
->port
.closing_wait
,
2349 .baud_base
= info
->baud
,
2350 .custom_divisor
= info
->custom_divisor
,
2353 return copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)) ? -EFAULT
: 0;
2357 cy_set_serial_info(struct cyclades_port
*info
, struct tty_struct
*tty
,
2358 struct serial_struct __user
*new_info
)
2360 struct serial_struct new_serial
;
2362 if (copy_from_user(&new_serial
, new_info
, sizeof(new_serial
)))
2365 if (!capable(CAP_SYS_ADMIN
)) {
2366 if (new_serial
.close_delay
!= info
->port
.close_delay
||
2367 new_serial
.baud_base
!= info
->baud
||
2368 (new_serial
.flags
& ASYNC_FLAGS
&
2370 (info
->port
.flags
& ASYNC_FLAGS
& ~ASYNC_USR_MASK
))
2372 info
->port
.flags
= (info
->port
.flags
& ~ASYNC_USR_MASK
) |
2373 (new_serial
.flags
& ASYNC_USR_MASK
);
2374 info
->baud
= new_serial
.baud_base
;
2375 info
->custom_divisor
= new_serial
.custom_divisor
;
2376 goto check_and_exit
;
2380 * OK, past this point, all the error checking has been done.
2381 * At this point, we start making changes.....
2384 info
->baud
= new_serial
.baud_base
;
2385 info
->custom_divisor
= new_serial
.custom_divisor
;
2386 info
->port
.flags
= (info
->port
.flags
& ~ASYNC_FLAGS
) |
2387 (new_serial
.flags
& ASYNC_FLAGS
);
2388 info
->port
.close_delay
= new_serial
.close_delay
* HZ
/ 100;
2389 info
->port
.closing_wait
= new_serial
.closing_wait
* HZ
/ 100;
2392 if (info
->port
.flags
& ASYNC_INITIALIZED
) {
2393 cy_set_line_char(info
, tty
);
2396 return cy_startup(info
, tty
);
2398 } /* set_serial_info */
2401 * get_lsr_info - get line status register info
2403 * Purpose: Let user call ioctl() to get info when the UART physically
2404 * is emptied. On bus types like RS485, the transmitter must
2405 * release the bus after transmitting. This must be done when
2406 * the transmit shift register is empty, not be done when the
2407 * transmit holding register is empty. This functionality
2408 * allows an RS485 driver to be written in user space.
2410 static int get_lsr_info(struct cyclades_port
*info
, unsigned int __user
*value
)
2412 struct cyclades_card
*card
= info
->card
;
2413 unsigned int result
;
2414 unsigned long flags
;
2417 if (!cy_is_Z(card
)) {
2418 spin_lock_irqsave(&card
->card_lock
, flags
);
2419 status
= cyy_readb(info
, CySRER
) & (CyTxRdy
| CyTxMpty
);
2420 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2421 result
= (status
? 0 : TIOCSER_TEMT
);
2423 /* Not supported yet */
2426 return put_user(result
, (unsigned long __user
*)value
);
2429 static int cy_tiocmget(struct tty_struct
*tty
, struct file
*file
)
2431 struct cyclades_port
*info
= tty
->driver_data
;
2432 struct cyclades_card
*card
;
2435 if (serial_paranoia_check(info
, tty
->name
, __func__
))
2441 if (!cy_is_Z(card
)) {
2442 unsigned long flags
;
2443 int channel
= info
->line
- card
->first_line
;
2446 spin_lock_irqsave(&card
->card_lock
, flags
);
2447 cyy_writeb(info
, CyCAR
, channel
& 0x03);
2448 status
= cyy_readb(info
, CyMSVR1
);
2449 status
|= cyy_readb(info
, CyMSVR2
);
2450 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2452 if (info
->rtsdtr_inv
) {
2453 result
= ((status
& CyRTS
) ? TIOCM_DTR
: 0) |
2454 ((status
& CyDTR
) ? TIOCM_RTS
: 0);
2456 result
= ((status
& CyRTS
) ? TIOCM_RTS
: 0) |
2457 ((status
& CyDTR
) ? TIOCM_DTR
: 0);
2459 result
|= ((status
& CyDCD
) ? TIOCM_CAR
: 0) |
2460 ((status
& CyRI
) ? TIOCM_RNG
: 0) |
2461 ((status
& CyDSR
) ? TIOCM_DSR
: 0) |
2462 ((status
& CyCTS
) ? TIOCM_CTS
: 0);
2466 if (!cyz_is_loaded(card
)) {
2471 lstatus
= readl(&info
->u
.cyz
.ch_ctrl
->rs_status
);
2472 result
= ((lstatus
& C_RS_RTS
) ? TIOCM_RTS
: 0) |
2473 ((lstatus
& C_RS_DTR
) ? TIOCM_DTR
: 0) |
2474 ((lstatus
& C_RS_DCD
) ? TIOCM_CAR
: 0) |
2475 ((lstatus
& C_RS_RI
) ? TIOCM_RNG
: 0) |
2476 ((lstatus
& C_RS_DSR
) ? TIOCM_DSR
: 0) |
2477 ((lstatus
& C_RS_CTS
) ? TIOCM_CTS
: 0);
2485 cy_tiocmset(struct tty_struct
*tty
, struct file
*file
,
2486 unsigned int set
, unsigned int clear
)
2488 struct cyclades_port
*info
= tty
->driver_data
;
2489 struct cyclades_card
*card
;
2490 unsigned long flags
;
2492 if (serial_paranoia_check(info
, tty
->name
, __func__
))
2496 if (!cy_is_Z(card
)) {
2497 spin_lock_irqsave(&card
->card_lock
, flags
);
2498 cyy_change_rts_dtr(info
, set
, clear
);
2499 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2501 struct CH_CTRL __iomem
*ch_ctrl
= info
->u
.cyz
.ch_ctrl
;
2502 int retval
, channel
= info
->line
- card
->first_line
;
2505 if (!cyz_is_loaded(card
))
2508 spin_lock_irqsave(&card
->card_lock
, flags
);
2509 rs
= readl(&ch_ctrl
->rs_control
);
2510 if (set
& TIOCM_RTS
)
2512 if (clear
& TIOCM_RTS
)
2514 if (set
& TIOCM_DTR
) {
2517 printk(KERN_DEBUG
"cyc:set_modem_info raising Z DTR\n");
2520 if (clear
& TIOCM_DTR
) {
2523 printk(KERN_DEBUG
"cyc:set_modem_info clearing "
2527 cy_writel(&ch_ctrl
->rs_control
, rs
);
2528 retval
= cyz_issue_cmd(card
, channel
, C_CM_IOCTLM
, 0L);
2529 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2531 printk(KERN_ERR
"cyc:set_modem_info retval on ttyC%d "
2532 "was %x\n", info
->line
, retval
);
2539 * cy_break() --- routine which turns the break handling on or off
2541 static int cy_break(struct tty_struct
*tty
, int break_state
)
2543 struct cyclades_port
*info
= tty
->driver_data
;
2544 struct cyclades_card
*card
;
2545 unsigned long flags
;
2548 if (serial_paranoia_check(info
, tty
->name
, "cy_break"))
2553 spin_lock_irqsave(&card
->card_lock
, flags
);
2554 if (!cy_is_Z(card
)) {
2555 /* Let the transmit ISR take care of this (since it
2556 requires stuffing characters into the output stream).
2558 if (break_state
== -1) {
2559 if (!info
->breakon
) {
2561 if (!info
->xmit_cnt
) {
2562 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2564 spin_lock_irqsave(&card
->card_lock
, flags
);
2568 if (!info
->breakoff
) {
2570 if (!info
->xmit_cnt
) {
2571 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2573 spin_lock_irqsave(&card
->card_lock
, flags
);
2578 if (break_state
== -1) {
2579 retval
= cyz_issue_cmd(card
,
2580 info
->line
- card
->first_line
,
2581 C_CM_SET_BREAK
, 0L);
2583 printk(KERN_ERR
"cyc:cy_break (set) retval on "
2584 "ttyC%d was %x\n", info
->line
, retval
);
2587 retval
= cyz_issue_cmd(card
,
2588 info
->line
- card
->first_line
,
2589 C_CM_CLR_BREAK
, 0L);
2591 printk(KERN_DEBUG
"cyc:cy_break (clr) retval "
2592 "on ttyC%d was %x\n", info
->line
,
2597 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2601 static int set_threshold(struct cyclades_port
*info
, unsigned long value
)
2603 struct cyclades_card
*card
= info
->card
;
2604 unsigned long flags
;
2606 if (!cy_is_Z(card
)) {
2607 info
->cor3
&= ~CyREC_FIFO
;
2608 info
->cor3
|= value
& CyREC_FIFO
;
2610 spin_lock_irqsave(&card
->card_lock
, flags
);
2611 cyy_writeb(info
, CyCOR3
, info
->cor3
);
2612 cyy_issue_cmd(info
, CyCOR_CHANGE
| CyCOR3ch
);
2613 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2616 } /* set_threshold */
2618 static int get_threshold(struct cyclades_port
*info
,
2619 unsigned long __user
*value
)
2621 struct cyclades_card
*card
= info
->card
;
2623 if (!cy_is_Z(card
)) {
2624 u8 tmp
= cyy_readb(info
, CyCOR3
) & CyREC_FIFO
;
2625 return put_user(tmp
, value
);
2628 } /* get_threshold */
2630 static int set_timeout(struct cyclades_port
*info
, unsigned long value
)
2632 struct cyclades_card
*card
= info
->card
;
2633 unsigned long flags
;
2635 if (!cy_is_Z(card
)) {
2636 spin_lock_irqsave(&card
->card_lock
, flags
);
2637 cyy_writeb(info
, CyRTPR
, value
& 0xff);
2638 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2643 static int get_timeout(struct cyclades_port
*info
,
2644 unsigned long __user
*value
)
2646 struct cyclades_card
*card
= info
->card
;
2648 if (!cy_is_Z(card
)) {
2649 u8 tmp
= cyy_readb(info
, CyRTPR
);
2650 return put_user(tmp
, value
);
2655 static int cy_cflags_changed(struct cyclades_port
*info
, unsigned long arg
,
2656 struct cyclades_icount
*cprev
)
2658 struct cyclades_icount cnow
;
2659 unsigned long flags
;
2662 spin_lock_irqsave(&info
->card
->card_lock
, flags
);
2663 cnow
= info
->icount
; /* atomic copy */
2664 spin_unlock_irqrestore(&info
->card
->card_lock
, flags
);
2666 ret
= ((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
->rng
)) ||
2667 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
->dsr
)) ||
2668 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
->dcd
)) ||
2669 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
->cts
));
2677 * This routine allows the tty driver to implement device-
2678 * specific ioctl's. If the ioctl number passed in cmd is
2679 * not recognized by the driver, it should return ENOIOCTLCMD.
2682 cy_ioctl(struct tty_struct
*tty
, struct file
*file
,
2683 unsigned int cmd
, unsigned long arg
)
2685 struct cyclades_port
*info
= tty
->driver_data
;
2686 struct cyclades_icount cnow
; /* kernel counter temps */
2688 unsigned long flags
;
2689 void __user
*argp
= (void __user
*)arg
;
2691 if (serial_paranoia_check(info
, tty
->name
, "cy_ioctl"))
2694 #ifdef CY_DEBUG_OTHER
2695 printk(KERN_DEBUG
"cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
2696 info
->line
, cmd
, arg
);
2702 if (copy_to_user(argp
, &info
->mon
, sizeof(info
->mon
))) {
2706 memset(&info
->mon
, 0, sizeof(info
->mon
));
2709 ret_val
= get_threshold(info
, argp
);
2712 ret_val
= set_threshold(info
, arg
);
2714 case CYGETDEFTHRESH
:
2715 ret_val
= put_user(info
->default_threshold
,
2716 (unsigned long __user
*)argp
);
2718 case CYSETDEFTHRESH
:
2719 info
->default_threshold
= arg
& 0x0f;
2722 ret_val
= get_timeout(info
, argp
);
2725 ret_val
= set_timeout(info
, arg
);
2727 case CYGETDEFTIMEOUT
:
2728 ret_val
= put_user(info
->default_timeout
,
2729 (unsigned long __user
*)argp
);
2731 case CYSETDEFTIMEOUT
:
2732 info
->default_timeout
= arg
& 0xff;
2735 info
->rflow
= (int)arg
;
2738 ret_val
= info
->rflow
;
2740 case CYSETRTSDTR_INV
:
2741 info
->rtsdtr_inv
= (int)arg
;
2743 case CYGETRTSDTR_INV
:
2744 ret_val
= info
->rtsdtr_inv
;
2746 case CYGETCD1400VER
:
2747 ret_val
= info
->chip_rev
;
2749 #ifndef CONFIG_CYZ_INTR
2750 case CYZSETPOLLCYCLE
:
2751 cyz_polling_cycle
= (arg
* HZ
) / 1000;
2753 case CYZGETPOLLCYCLE
:
2754 ret_val
= (cyz_polling_cycle
* 1000) / HZ
;
2756 #endif /* CONFIG_CYZ_INTR */
2758 info
->port
.closing_wait
= (unsigned short)arg
* HZ
/ 100;
2761 ret_val
= info
->port
.closing_wait
/ (HZ
/ 100);
2764 ret_val
= cy_get_serial_info(info
, argp
);
2767 ret_val
= cy_set_serial_info(info
, tty
, argp
);
2769 case TIOCSERGETLSR
: /* Get line status register */
2770 ret_val
= get_lsr_info(info
, argp
);
2773 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
2774 * - mask passed in arg for lines of interest
2775 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
2776 * Caller should use TIOCGICOUNT to see which one it was
2779 spin_lock_irqsave(&info
->card
->card_lock
, flags
);
2780 /* note the counters on entry */
2781 cnow
= info
->icount
;
2782 spin_unlock_irqrestore(&info
->card
->card_lock
, flags
);
2783 ret_val
= wait_event_interruptible(info
->port
.delta_msr_wait
,
2784 cy_cflags_changed(info
, arg
, &cnow
));
2788 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
2789 * Return: write counters to the user passed counter struct
2790 * NB: both 1->0 and 0->1 transitions are counted except for
2791 * RI where only 0->1 is counted.
2794 struct serial_icounter_struct sic
= { };
2796 spin_lock_irqsave(&info
->card
->card_lock
, flags
);
2797 cnow
= info
->icount
;
2798 spin_unlock_irqrestore(&info
->card
->card_lock
, flags
);
2806 sic
.frame
= cnow
.frame
;
2807 sic
.overrun
= cnow
.overrun
;
2808 sic
.parity
= cnow
.parity
;
2810 sic
.buf_overrun
= cnow
.buf_overrun
;
2812 if (copy_to_user(argp
, &sic
, sizeof(sic
)))
2817 ret_val
= -ENOIOCTLCMD
;
2821 #ifdef CY_DEBUG_OTHER
2822 printk(KERN_DEBUG
"cyc:cy_ioctl done\n");
2828 * This routine allows the tty driver to be notified when
2829 * device's termios settings have changed. Note that a
2830 * well-designed tty driver should be prepared to accept the case
2831 * where old == NULL, and try to do something rational.
2833 static void cy_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
2835 struct cyclades_port
*info
= tty
->driver_data
;
2837 #ifdef CY_DEBUG_OTHER
2838 printk(KERN_DEBUG
"cyc:cy_set_termios ttyC%d\n", info
->line
);
2841 cy_set_line_char(info
, tty
);
2843 if ((old_termios
->c_cflag
& CRTSCTS
) &&
2844 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
2845 tty
->hw_stopped
= 0;
2850 * No need to wake up processes in open wait, since they
2851 * sample the CLOCAL flag once, and don't recheck it.
2852 * XXX It's not clear whether the current behavior is correct
2853 * or not. Hence, this may change.....
2855 if (!(old_termios
->c_cflag
& CLOCAL
) &&
2856 (tty
->termios
->c_cflag
& CLOCAL
))
2857 wake_up_interruptible(&info
->port
.open_wait
);
2859 } /* cy_set_termios */
2861 /* This function is used to send a high-priority XON/XOFF character to
2864 static void cy_send_xchar(struct tty_struct
*tty
, char ch
)
2866 struct cyclades_port
*info
= tty
->driver_data
;
2867 struct cyclades_card
*card
;
2870 if (serial_paranoia_check(info
, tty
->name
, "cy_send_xchar"))
2879 channel
= info
->line
- card
->first_line
;
2881 if (cy_is_Z(card
)) {
2882 if (ch
== STOP_CHAR(tty
))
2883 cyz_issue_cmd(card
, channel
, C_CM_SENDXOFF
, 0L);
2884 else if (ch
== START_CHAR(tty
))
2885 cyz_issue_cmd(card
, channel
, C_CM_SENDXON
, 0L);
2889 /* This routine is called by the upper-layer tty layer to signal
2890 that incoming characters should be throttled because the input
2891 buffers are close to full.
2893 static void cy_throttle(struct tty_struct
*tty
)
2895 struct cyclades_port
*info
= tty
->driver_data
;
2896 struct cyclades_card
*card
;
2897 unsigned long flags
;
2899 #ifdef CY_DEBUG_THROTTLE
2902 printk(KERN_DEBUG
"cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty
, buf
),
2903 tty
->ldisc
.chars_in_buffer(tty
), info
->line
);
2906 if (serial_paranoia_check(info
, tty
->name
, "cy_throttle"))
2913 cy_send_xchar(tty
, STOP_CHAR(tty
));
2918 if (tty
->termios
->c_cflag
& CRTSCTS
) {
2919 if (!cy_is_Z(card
)) {
2920 spin_lock_irqsave(&card
->card_lock
, flags
);
2921 cyy_change_rts_dtr(info
, 0, TIOCM_RTS
);
2922 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2930 * This routine notifies the tty driver that it should signal
2931 * that characters can now be sent to the tty without fear of
2932 * overrunning the input buffers of the line disciplines.
2934 static void cy_unthrottle(struct tty_struct
*tty
)
2936 struct cyclades_port
*info
= tty
->driver_data
;
2937 struct cyclades_card
*card
;
2938 unsigned long flags
;
2940 #ifdef CY_DEBUG_THROTTLE
2943 printk(KERN_DEBUG
"cyc:unthrottle %s: %ld...ttyC%d\n",
2944 tty_name(tty
, buf
), tty_chars_in_buffer(tty
), info
->line
);
2947 if (serial_paranoia_check(info
, tty
->name
, "cy_unthrottle"))
2954 cy_send_xchar(tty
, START_CHAR(tty
));
2957 if (tty
->termios
->c_cflag
& CRTSCTS
) {
2959 if (!cy_is_Z(card
)) {
2960 spin_lock_irqsave(&card
->card_lock
, flags
);
2961 cyy_change_rts_dtr(info
, TIOCM_RTS
, 0);
2962 spin_unlock_irqrestore(&card
->card_lock
, flags
);
2967 } /* cy_unthrottle */
2969 /* cy_start and cy_stop provide software output flow control as a
2970 function of XON/XOFF, software CTS, and other such stuff.
2972 static void cy_stop(struct tty_struct
*tty
)
2974 struct cyclades_card
*cinfo
;
2975 struct cyclades_port
*info
= tty
->driver_data
;
2977 unsigned long flags
;
2979 #ifdef CY_DEBUG_OTHER
2980 printk(KERN_DEBUG
"cyc:cy_stop ttyC%d\n", info
->line
);
2983 if (serial_paranoia_check(info
, tty
->name
, "cy_stop"))
2987 channel
= info
->line
- cinfo
->first_line
;
2988 if (!cy_is_Z(cinfo
)) {
2989 spin_lock_irqsave(&cinfo
->card_lock
, flags
);
2990 cyy_writeb(info
, CyCAR
, channel
& 0x03);
2991 cyy_writeb(info
, CySRER
, cyy_readb(info
, CySRER
) & ~CyTxRdy
);
2992 spin_unlock_irqrestore(&cinfo
->card_lock
, flags
);
2996 static void cy_start(struct tty_struct
*tty
)
2998 struct cyclades_card
*cinfo
;
2999 struct cyclades_port
*info
= tty
->driver_data
;
3001 unsigned long flags
;
3003 #ifdef CY_DEBUG_OTHER
3004 printk(KERN_DEBUG
"cyc:cy_start ttyC%d\n", info
->line
);
3007 if (serial_paranoia_check(info
, tty
->name
, "cy_start"))
3011 channel
= info
->line
- cinfo
->first_line
;
3012 if (!cy_is_Z(cinfo
)) {
3013 spin_lock_irqsave(&cinfo
->card_lock
, flags
);
3014 cyy_writeb(info
, CyCAR
, channel
& 0x03);
3015 cyy_writeb(info
, CySRER
, cyy_readb(info
, CySRER
) | CyTxRdy
);
3016 spin_unlock_irqrestore(&cinfo
->card_lock
, flags
);
3021 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
3023 static void cy_hangup(struct tty_struct
*tty
)
3025 struct cyclades_port
*info
= tty
->driver_data
;
3027 #ifdef CY_DEBUG_OTHER
3028 printk(KERN_DEBUG
"cyc:cy_hangup ttyC%d\n", info
->line
);
3031 if (serial_paranoia_check(info
, tty
->name
, "cy_hangup"))
3034 cy_flush_buffer(tty
);
3035 cy_shutdown(info
, tty
);
3036 tty_port_hangup(&info
->port
);
3039 static int cyy_carrier_raised(struct tty_port
*port
)
3041 struct cyclades_port
*info
= container_of(port
, struct cyclades_port
,
3043 struct cyclades_card
*cinfo
= info
->card
;
3044 unsigned long flags
;
3045 int channel
= info
->line
- cinfo
->first_line
;
3048 spin_lock_irqsave(&cinfo
->card_lock
, flags
);
3049 cyy_writeb(info
, CyCAR
, channel
& 0x03);
3050 cd
= cyy_readb(info
, CyMSVR1
) & CyDCD
;
3051 spin_unlock_irqrestore(&cinfo
->card_lock
, flags
);
3056 static void cyy_dtr_rts(struct tty_port
*port
, int raise
)
3058 struct cyclades_port
*info
= container_of(port
, struct cyclades_port
,
3060 struct cyclades_card
*cinfo
= info
->card
;
3061 unsigned long flags
;
3063 spin_lock_irqsave(&cinfo
->card_lock
, flags
);
3064 cyy_change_rts_dtr(info
, raise
? TIOCM_RTS
| TIOCM_DTR
: 0,
3065 raise
? 0 : TIOCM_RTS
| TIOCM_DTR
);
3066 spin_unlock_irqrestore(&cinfo
->card_lock
, flags
);
3069 static int cyz_carrier_raised(struct tty_port
*port
)
3071 struct cyclades_port
*info
= container_of(port
, struct cyclades_port
,
3074 return readl(&info
->u
.cyz
.ch_ctrl
->rs_status
) & C_RS_DCD
;
3077 static void cyz_dtr_rts(struct tty_port
*port
, int raise
)
3079 struct cyclades_port
*info
= container_of(port
, struct cyclades_port
,
3081 struct cyclades_card
*cinfo
= info
->card
;
3082 struct CH_CTRL __iomem
*ch_ctrl
= info
->u
.cyz
.ch_ctrl
;
3083 int ret
, channel
= info
->line
- cinfo
->first_line
;
3086 rs
= readl(&ch_ctrl
->rs_control
);
3088 rs
|= C_RS_RTS
| C_RS_DTR
;
3090 rs
&= ~(C_RS_RTS
| C_RS_DTR
);
3091 cy_writel(&ch_ctrl
->rs_control
, rs
);
3092 ret
= cyz_issue_cmd(cinfo
, channel
, C_CM_IOCTLM
, 0L);
3094 printk(KERN_ERR
"%s: retval on ttyC%d was %x\n",
3095 __func__
, info
->line
, ret
);
3097 printk(KERN_DEBUG
"%s: raising Z DTR\n", __func__
);
3101 static const struct tty_port_operations cyy_port_ops
= {
3102 .carrier_raised
= cyy_carrier_raised
,
3103 .dtr_rts
= cyy_dtr_rts
,
3104 .shutdown
= cy_do_close
,
3107 static const struct tty_port_operations cyz_port_ops
= {
3108 .carrier_raised
= cyz_carrier_raised
,
3109 .dtr_rts
= cyz_dtr_rts
,
3110 .shutdown
= cy_do_close
,
3114 * ---------------------------------------------------------------------
3115 * cy_init() and friends
3117 * cy_init() is called at boot-time to initialize the serial driver.
3118 * ---------------------------------------------------------------------
3121 static int __devinit
cy_init_card(struct cyclades_card
*cinfo
)
3123 struct cyclades_port
*info
;
3124 unsigned int channel
, port
;
3126 spin_lock_init(&cinfo
->card_lock
);
3127 cinfo
->intr_enabled
= 0;
3129 cinfo
->ports
= kcalloc(cinfo
->nports
, sizeof(*cinfo
->ports
),
3131 if (cinfo
->ports
== NULL
) {
3132 printk(KERN_ERR
"Cyclades: cannot allocate ports\n");
3136 for (channel
= 0, port
= cinfo
->first_line
; channel
< cinfo
->nports
;
3137 channel
++, port
++) {
3138 info
= &cinfo
->ports
[channel
];
3139 tty_port_init(&info
->port
);
3140 info
->magic
= CYCLADES_MAGIC
;
3144 info
->port
.closing_wait
= CLOSING_WAIT_DELAY
;
3145 info
->port
.close_delay
= 5 * HZ
/ 10;
3146 info
->port
.flags
= STD_COM_FLAGS
;
3147 init_completion(&info
->shutdown_wait
);
3149 if (cy_is_Z(cinfo
)) {
3150 struct FIRM_ID
*firm_id
= cinfo
->base_addr
+ ID_ADDRESS
;
3151 struct ZFW_CTRL
*zfw_ctrl
;
3153 info
->port
.ops
= &cyz_port_ops
;
3154 info
->type
= PORT_STARTECH
;
3156 zfw_ctrl
= cinfo
->base_addr
+
3157 (readl(&firm_id
->zfwctrl_addr
) & 0xfffff);
3158 info
->u
.cyz
.ch_ctrl
= &zfw_ctrl
->ch_ctrl
[channel
];
3159 info
->u
.cyz
.buf_ctrl
= &zfw_ctrl
->buf_ctrl
[channel
];
3161 if (cinfo
->hw_ver
== ZO_V1
)
3162 info
->xmit_fifo_size
= CYZ_FIFO_SIZE
;
3164 info
->xmit_fifo_size
= 4 * CYZ_FIFO_SIZE
;
3165 #ifdef CONFIG_CYZ_INTR
3166 setup_timer(&cyz_rx_full_timer
[port
],
3167 cyz_rx_restart
, (unsigned long)info
);
3170 unsigned short chip_number
;
3171 int index
= cinfo
->bus_index
;
3173 info
->port
.ops
= &cyy_port_ops
;
3174 info
->type
= PORT_CIRRUS
;
3175 info
->xmit_fifo_size
= CyMAX_CHAR_FIFO
;
3176 info
->cor1
= CyPARITY_NONE
| Cy_1_STOP
| Cy_8_BITS
;
3178 info
->cor3
= 0x08; /* _very_ small rcv threshold */
3180 chip_number
= channel
/ CyPORTS_PER_CHIP
;
3181 info
->u
.cyy
.base_addr
= cinfo
->base_addr
+
3182 (cy_chip_offset
[chip_number
] << index
);
3183 info
->chip_rev
= cyy_readb(info
, CyGFRCR
);
3185 if (info
->chip_rev
>= CD1400_REV_J
) {
3186 /* It is a CD1400 rev. J or later */
3187 info
->tbpr
= baud_bpr_60
[13]; /* Tx BPR */
3188 info
->tco
= baud_co_60
[13]; /* Tx CO */
3189 info
->rbpr
= baud_bpr_60
[13]; /* Rx BPR */
3190 info
->rco
= baud_co_60
[13]; /* Rx CO */
3191 info
->rtsdtr_inv
= 1;
3193 info
->tbpr
= baud_bpr_25
[13]; /* Tx BPR */
3194 info
->tco
= baud_co_25
[13]; /* Tx CO */
3195 info
->rbpr
= baud_bpr_25
[13]; /* Rx BPR */
3196 info
->rco
= baud_co_25
[13]; /* Rx CO */
3197 info
->rtsdtr_inv
= 0;
3199 info
->read_status_mask
= CyTIMEOUT
| CySPECHAR
|
3200 CyBREAK
| CyPARITY
| CyFRAME
| CyOVERRUN
;
3205 #ifndef CONFIG_CYZ_INTR
3206 if (cy_is_Z(cinfo
) && !timer_pending(&cyz_timerlist
)) {
3207 mod_timer(&cyz_timerlist
, jiffies
+ 1);
3209 printk(KERN_DEBUG
"Cyclades-Z polling initialized\n");
3216 /* initialize chips on Cyclom-Y card -- return number of valid
3217 chips (which is number of ports/4) */
3218 static unsigned short __devinit
cyy_init_card(void __iomem
*true_base_addr
,
3221 unsigned int chip_number
;
3222 void __iomem
*base_addr
;
3224 cy_writeb(true_base_addr
+ (Cy_HwReset
<< index
), 0);
3225 /* Cy_HwReset is 0x1400 */
3226 cy_writeb(true_base_addr
+ (Cy_ClrIntr
<< index
), 0);
3227 /* Cy_ClrIntr is 0x1800 */
3230 for (chip_number
= 0; chip_number
< CyMAX_CHIPS_PER_CARD
;
3233 true_base_addr
+ (cy_chip_offset
[chip_number
] << index
);
3235 if (readb(base_addr
+ (CyCCR
<< index
)) != 0x00) {
3237 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
3238 chip_number, (unsigned long)base_addr);
3243 cy_writeb(base_addr
+ (CyGFRCR
<< index
), 0);
3246 /* The Cyclom-16Y does not decode address bit 9 and therefore
3247 cannot distinguish between references to chip 0 and a non-
3248 existent chip 4. If the preceding clearing of the supposed
3249 chip 4 GFRCR register appears at chip 0, there is no chip 4
3250 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
3252 if (chip_number
== 4 && readb(true_base_addr
+
3253 (cy_chip_offset
[0] << index
) +
3254 (CyGFRCR
<< index
)) == 0) {
3258 cy_writeb(base_addr
+ (CyCCR
<< index
), CyCHIP_RESET
);
3261 if (readb(base_addr
+ (CyGFRCR
<< index
)) == 0x00) {
3263 printk(" chip #%d at %#6lx is not responding ",
3264 chip_number, (unsigned long)base_addr);
3265 printk("(GFRCR stayed 0)\n",
3269 if ((0xf0 & (readb(base_addr
+ (CyGFRCR
<< index
)))) !=
3272 printk(" chip #%d at %#6lx is not valid (GFRCR == "
3274 chip_number, (unsigned long)base_addr,
3275 base_addr[CyGFRCR<<index]);
3279 cy_writeb(base_addr
+ (CyGCR
<< index
), CyCH0_SERIAL
);
3280 if (readb(base_addr
+ (CyGFRCR
<< index
)) >= CD1400_REV_J
) {
3281 /* It is a CD1400 rev. J or later */
3282 /* Impossible to reach 5ms with this chip.
3283 Changed to 2ms instead (f = 500 Hz). */
3284 cy_writeb(base_addr
+ (CyPPR
<< index
), CyCLOCK_60_2MS
);
3287 cy_writeb(base_addr
+ (CyPPR
<< index
), CyCLOCK_25_5MS
);
3291 printk(" chip #%d at %#6lx is rev 0x%2x\n",
3292 chip_number, (unsigned long)base_addr,
3293 readb(base_addr+(CyGFRCR<<index)));
3297 } /* cyy_init_card */
3300 * ---------------------------------------------------------------------
3301 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
3302 * sets global variables and return the number of ISA boards found.
3303 * ---------------------------------------------------------------------
3305 static int __init
cy_detect_isa(void)
3308 unsigned short cy_isa_irq
, nboard
;
3309 void __iomem
*cy_isa_address
;
3310 unsigned short i
, j
, cy_isa_nchan
;
3315 /* Check for module parameters */
3316 for (i
= 0; i
< NR_CARDS
; i
++) {
3317 if (maddr
[i
] || i
) {
3319 cy_isa_addresses
[i
] = maddr
[i
];
3325 /* scan the address table probing for Cyclom-Y/ISA boards */
3326 for (i
= 0; i
< NR_ISA_ADDRS
; i
++) {
3327 unsigned int isa_address
= cy_isa_addresses
[i
];
3328 if (isa_address
== 0x0000)
3331 /* probe for CD1400... */
3332 cy_isa_address
= ioremap_nocache(isa_address
, CyISA_Ywin
);
3333 if (cy_isa_address
== NULL
) {
3334 printk(KERN_ERR
"Cyclom-Y/ISA: can't remap base "
3338 cy_isa_nchan
= CyPORTS_PER_CHIP
*
3339 cyy_init_card(cy_isa_address
, 0);
3340 if (cy_isa_nchan
== 0) {
3341 iounmap(cy_isa_address
);
3345 if (isparam
&& i
< NR_CARDS
&& irq
[i
])
3346 cy_isa_irq
= irq
[i
];
3348 /* find out the board's irq by probing */
3349 cy_isa_irq
= detect_isa_irq(cy_isa_address
);
3350 if (cy_isa_irq
== 0) {
3351 printk(KERN_ERR
"Cyclom-Y/ISA found at 0x%lx, but the "
3352 "IRQ could not be detected.\n",
3353 (unsigned long)cy_isa_address
);
3354 iounmap(cy_isa_address
);
3358 if ((cy_next_channel
+ cy_isa_nchan
) > NR_PORTS
) {
3359 printk(KERN_ERR
"Cyclom-Y/ISA found at 0x%lx, but no "
3360 "more channels are available. Change NR_PORTS "
3361 "in cyclades.c and recompile kernel.\n",
3362 (unsigned long)cy_isa_address
);
3363 iounmap(cy_isa_address
);
3366 /* fill the next cy_card structure available */
3367 for (j
= 0; j
< NR_CARDS
; j
++) {
3368 if (cy_card
[j
].base_addr
== NULL
)
3371 if (j
== NR_CARDS
) { /* no more cy_cards available */
3372 printk(KERN_ERR
"Cyclom-Y/ISA found at 0x%lx, but no "
3373 "more cards can be used. Change NR_CARDS in "
3374 "cyclades.c and recompile kernel.\n",
3375 (unsigned long)cy_isa_address
);
3376 iounmap(cy_isa_address
);
3381 if (request_irq(cy_isa_irq
, cyy_interrupt
,
3382 IRQF_DISABLED
, "Cyclom-Y", &cy_card
[j
])) {
3383 printk(KERN_ERR
"Cyclom-Y/ISA found at 0x%lx, but "
3384 "could not allocate IRQ#%d.\n",
3385 (unsigned long)cy_isa_address
, cy_isa_irq
);
3386 iounmap(cy_isa_address
);
3391 cy_card
[j
].base_addr
= cy_isa_address
;
3392 cy_card
[j
].ctl_addr
.p9050
= NULL
;
3393 cy_card
[j
].irq
= (int)cy_isa_irq
;
3394 cy_card
[j
].bus_index
= 0;
3395 cy_card
[j
].first_line
= cy_next_channel
;
3396 cy_card
[j
].num_chips
= cy_isa_nchan
/ CyPORTS_PER_CHIP
;
3397 cy_card
[j
].nports
= cy_isa_nchan
;
3398 if (cy_init_card(&cy_card
[j
])) {
3399 cy_card
[j
].base_addr
= NULL
;
3400 free_irq(cy_isa_irq
, &cy_card
[j
]);
3401 iounmap(cy_isa_address
);
3406 printk(KERN_INFO
"Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
3407 "%d channels starting from port %d\n",
3408 j
+ 1, (unsigned long)cy_isa_address
,
3409 (unsigned long)(cy_isa_address
+ (CyISA_Ywin
- 1)),
3410 cy_isa_irq
, cy_isa_nchan
, cy_next_channel
);
3412 for (j
= cy_next_channel
;
3413 j
< cy_next_channel
+ cy_isa_nchan
; j
++)
3414 tty_register_device(cy_serial_driver
, j
, NULL
);
3415 cy_next_channel
+= cy_isa_nchan
;
3420 #endif /* CONFIG_ISA */
3421 } /* cy_detect_isa */
3424 static inline int __devinit
cyc_isfwstr(const char *str
, unsigned int size
)
3428 for (a
= 0; a
< size
&& *str
; a
++, str
++)
3432 for (; a
< size
; a
++, str
++)
3439 static inline void __devinit
cyz_fpga_copy(void __iomem
*fpga
, const u8
*data
,
3442 for (; size
> 0; size
--) {
3443 cy_writel(fpga
, *data
++);
3448 static void __devinit
plx_init(struct pci_dev
*pdev
, int irq
,
3449 struct RUNTIME_9060 __iomem
*addr
)
3452 cy_writel(&addr
->init_ctrl
, readl(&addr
->init_ctrl
) | 0x40000000);
3454 cy_writel(&addr
->init_ctrl
, readl(&addr
->init_ctrl
) & ~0x40000000);
3456 /* Reload Config. Registers from EEPROM */
3457 cy_writel(&addr
->init_ctrl
, readl(&addr
->init_ctrl
) | 0x20000000);
3459 cy_writel(&addr
->init_ctrl
, readl(&addr
->init_ctrl
) & ~0x20000000);
3461 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
3462 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
3463 * registers. This will remain here until we find a permanent fix.
3465 pci_write_config_byte(pdev
, PCI_INTERRUPT_LINE
, irq
);
3468 static int __devinit
__cyz_load_fw(const struct firmware
*fw
,
3469 const char *name
, const u32 mailbox
, void __iomem
*base
,
3472 const void *ptr
= fw
->data
;
3473 const struct zfile_header
*h
= ptr
;
3474 const struct zfile_config
*c
, *cs
;
3475 const struct zfile_block
*b
, *bs
;
3476 unsigned int a
, tmp
, len
= fw
->size
;
3477 #define BAD_FW KERN_ERR "Bad firmware: "
3478 if (len
< sizeof(*h
)) {
3479 printk(BAD_FW
"too short: %u<%zu\n", len
, sizeof(*h
));
3483 cs
= ptr
+ h
->config_offset
;
3484 bs
= ptr
+ h
->block_offset
;
3486 if ((void *)(cs
+ h
->n_config
) > ptr
+ len
||
3487 (void *)(bs
+ h
->n_blocks
) > ptr
+ len
) {
3488 printk(BAD_FW
"too short");
3492 if (cyc_isfwstr(h
->name
, sizeof(h
->name
)) ||
3493 cyc_isfwstr(h
->date
, sizeof(h
->date
))) {
3494 printk(BAD_FW
"bad formatted header string\n");
3498 if (strncmp(name
, h
->name
, sizeof(h
->name
))) {
3499 printk(BAD_FW
"bad name '%s' (expected '%s')\n", h
->name
, name
);
3504 for (c
= cs
; c
< cs
+ h
->n_config
; c
++) {
3505 for (a
= 0; a
< c
->n_blocks
; a
++)
3506 if (c
->block_list
[a
] > h
->n_blocks
) {
3507 printk(BAD_FW
"bad block ref number in cfgs\n");
3510 if (c
->mailbox
== mailbox
&& c
->function
== 0) /* 0 is normal */
3514 printk(BAD_FW
"nothing appropriate\n");
3518 for (b
= bs
; b
< bs
+ h
->n_blocks
; b
++)
3519 if (b
->file_offset
+ b
->size
> len
) {
3520 printk(BAD_FW
"bad block data offset\n");
3524 /* everything is OK, let's seek'n'load it */
3525 for (c
= cs
; c
< cs
+ h
->n_config
; c
++)
3526 if (c
->mailbox
== mailbox
&& c
->function
== 0)
3529 for (a
= 0; a
< c
->n_blocks
; a
++) {
3530 b
= &bs
[c
->block_list
[a
]];
3531 if (b
->type
== ZBLOCK_FPGA
) {
3533 cyz_fpga_copy(fpga
, ptr
+ b
->file_offset
,
3537 memcpy_toio(base
+ b
->ram_offset
,
3538 ptr
+ b
->file_offset
, b
->size
);
3545 static int __devinit
cyz_load_fw(struct pci_dev
*pdev
, void __iomem
*base_addr
,
3546 struct RUNTIME_9060 __iomem
*ctl_addr
, int irq
)
3548 const struct firmware
*fw
;
3549 struct FIRM_ID __iomem
*fid
= base_addr
+ ID_ADDRESS
;
3550 struct CUSTOM_REG __iomem
*cust
= base_addr
;
3551 struct ZFW_CTRL __iomem
*pt_zfwctrl
;
3553 u32 mailbox
, status
, nchan
;
3557 retval
= request_firmware(&fw
, "cyzfirm.bin", &pdev
->dev
);
3559 dev_err(&pdev
->dev
, "can't get firmware\n");
3563 /* Check whether the firmware is already loaded and running. If
3564 positive, skip this board */
3565 if (__cyz_fpga_loaded(ctl_addr
) && readl(&fid
->signature
) == ZFIRM_ID
) {
3566 u32 cntval
= readl(base_addr
+ 0x190);
3569 if (cntval
!= readl(base_addr
+ 0x190)) {
3570 /* FW counter is working, FW is running */
3571 dev_dbg(&pdev
->dev
, "Cyclades-Z FW already loaded. "
3572 "Skipping board.\n");
3579 cy_writel(&ctl_addr
->intr_ctrl_stat
, readl(&ctl_addr
->intr_ctrl_stat
) &
3582 mailbox
= readl(&ctl_addr
->mail_box_0
);
3584 if (mailbox
== 0 || __cyz_fpga_loaded(ctl_addr
)) {
3585 /* stops CPU and set window to beginning of RAM */
3586 cy_writel(&ctl_addr
->loc_addr_base
, WIN_CREG
);
3587 cy_writel(&cust
->cpu_stop
, 0);
3588 cy_writel(&ctl_addr
->loc_addr_base
, WIN_RAM
);
3592 plx_init(pdev
, irq
, ctl_addr
);
3596 retval
= __cyz_load_fw(fw
, "Cyclom-Z", mailbox
, NULL
,
3600 if (!__cyz_fpga_loaded(ctl_addr
)) {
3601 dev_err(&pdev
->dev
, "fw upload successful, but fw is "
3607 /* stops CPU and set window to beginning of RAM */
3608 cy_writel(&ctl_addr
->loc_addr_base
, WIN_CREG
);
3609 cy_writel(&cust
->cpu_stop
, 0);
3610 cy_writel(&ctl_addr
->loc_addr_base
, WIN_RAM
);
3614 for (tmp
= base_addr
; tmp
< base_addr
+ RAM_SIZE
; tmp
++)
3615 cy_writeb(tmp
, 255);
3617 /* set window to last 512K of RAM */
3618 cy_writel(&ctl_addr
->loc_addr_base
, WIN_RAM
+ RAM_SIZE
);
3619 for (tmp
= base_addr
; tmp
< base_addr
+ RAM_SIZE
; tmp
++)
3620 cy_writeb(tmp
, 255);
3621 /* set window to beginning of RAM */
3622 cy_writel(&ctl_addr
->loc_addr_base
, WIN_RAM
);
3625 retval
= __cyz_load_fw(fw
, "Cyclom-Z", mailbox
, base_addr
, NULL
);
3626 release_firmware(fw
);
3630 /* finish boot and start boards */
3631 cy_writel(&ctl_addr
->loc_addr_base
, WIN_CREG
);
3632 cy_writel(&cust
->cpu_start
, 0);
3633 cy_writel(&ctl_addr
->loc_addr_base
, WIN_RAM
);
3635 while ((status
= readl(&fid
->signature
)) != ZFIRM_ID
&& i
++ < 40)
3637 if (status
!= ZFIRM_ID
) {
3638 if (status
== ZFIRM_HLT
) {
3639 dev_err(&pdev
->dev
, "you need an external power supply "
3640 "for this number of ports. Firmware halted and "
3645 dev_warn(&pdev
->dev
, "fid->signature = 0x%x... Waiting "
3646 "some more time\n", status
);
3647 while ((status
= readl(&fid
->signature
)) != ZFIRM_ID
&&
3650 if (status
!= ZFIRM_ID
) {
3651 dev_err(&pdev
->dev
, "Board not started in 20 seconds! "
3652 "Giving up. (fid->signature = 0x%x)\n",
3654 dev_info(&pdev
->dev
, "*** Warning ***: if you are "
3655 "upgrading the FW, please power cycle the "
3656 "system before loading the new FW to the "
3659 if (__cyz_fpga_loaded(ctl_addr
))
3660 plx_init(pdev
, irq
, ctl_addr
);
3665 dev_dbg(&pdev
->dev
, "Firmware started after %d seconds.\n",
3668 pt_zfwctrl
= base_addr
+ readl(&fid
->zfwctrl_addr
);
3670 dev_dbg(&pdev
->dev
, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
3671 base_addr
+ ID_ADDRESS
, readl(&fid
->zfwctrl_addr
),
3672 base_addr
+ readl(&fid
->zfwctrl_addr
));
3674 nchan
= readl(&pt_zfwctrl
->board_ctrl
.n_channel
);
3675 dev_info(&pdev
->dev
, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
3676 readl(&pt_zfwctrl
->board_ctrl
.fw_version
), nchan
);
3679 dev_warn(&pdev
->dev
, "no Cyclades-Z ports were found. Please "
3680 "check the connection between the Z host card and the "
3681 "serial expanders.\n");
3683 if (__cyz_fpga_loaded(ctl_addr
))
3684 plx_init(pdev
, irq
, ctl_addr
);
3686 dev_info(&pdev
->dev
, "Null number of ports detected. Board "
3692 cy_writel(&pt_zfwctrl
->board_ctrl
.op_system
, C_OS_LINUX
);
3693 cy_writel(&pt_zfwctrl
->board_ctrl
.dr_version
, DRIVER_VERSION
);
3696 Early firmware failed to start looking for commands.
3697 This enables firmware interrupts for those commands.
3699 cy_writel(&ctl_addr
->intr_ctrl_stat
, readl(&ctl_addr
->intr_ctrl_stat
) |
3701 cy_writel(&ctl_addr
->intr_ctrl_stat
, readl(&ctl_addr
->intr_ctrl_stat
) |
3706 release_firmware(fw
);
3711 static int __devinit
cy_pci_probe(struct pci_dev
*pdev
,
3712 const struct pci_device_id
*ent
)
3714 void __iomem
*addr0
= NULL
, *addr2
= NULL
;
3715 char *card_name
= NULL
;
3716 u32
uninitialized_var(mailbox
);
3717 unsigned int device_id
, nchan
= 0, card_no
, i
;
3718 unsigned char plx_ver
;
3721 retval
= pci_enable_device(pdev
);
3723 dev_err(&pdev
->dev
, "cannot enable device\n");
3727 /* read PCI configuration area */
3729 device_id
= pdev
->device
& ~PCI_DEVICE_ID_MASK
;
3731 #if defined(__alpha__)
3732 if (device_id
== PCI_DEVICE_ID_CYCLOM_Y_Lo
) { /* below 1M? */
3733 dev_err(&pdev
->dev
, "Cyclom-Y/PCI not supported for low "
3734 "addresses on Alpha systems.\n");
3739 if (device_id
== PCI_DEVICE_ID_CYCLOM_Z_Lo
) {
3740 dev_err(&pdev
->dev
, "Cyclades-Z/PCI not supported for low "
3746 if (pci_resource_flags(pdev
, 2) & IORESOURCE_IO
) {
3747 dev_warn(&pdev
->dev
, "PCI I/O bit incorrectly set. Ignoring "
3749 pdev
->resource
[2].flags
&= ~IORESOURCE_IO
;
3752 retval
= pci_request_regions(pdev
, "cyclades");
3754 dev_err(&pdev
->dev
, "failed to reserve resources\n");
3759 if (device_id
== PCI_DEVICE_ID_CYCLOM_Y_Lo
||
3760 device_id
== PCI_DEVICE_ID_CYCLOM_Y_Hi
) {
3761 card_name
= "Cyclom-Y";
3763 addr0
= ioremap_nocache(pci_resource_start(pdev
, 0),
3765 if (addr0
== NULL
) {
3766 dev_err(&pdev
->dev
, "can't remap ctl region\n");
3769 addr2
= ioremap_nocache(pci_resource_start(pdev
, 2),
3771 if (addr2
== NULL
) {
3772 dev_err(&pdev
->dev
, "can't remap base region\n");
3776 nchan
= CyPORTS_PER_CHIP
* cyy_init_card(addr2
, 1);
3778 dev_err(&pdev
->dev
, "Cyclom-Y PCI host card with no "
3779 "Serial-Modules\n");
3782 } else if (device_id
== PCI_DEVICE_ID_CYCLOM_Z_Hi
) {
3783 struct RUNTIME_9060 __iomem
*ctl_addr
;
3785 ctl_addr
= addr0
= ioremap_nocache(pci_resource_start(pdev
, 0),
3787 if (addr0
== NULL
) {
3788 dev_err(&pdev
->dev
, "can't remap ctl region\n");
3792 /* Disable interrupts on the PLX before resetting it */
3793 cy_writew(&ctl_addr
->intr_ctrl_stat
,
3794 readw(&ctl_addr
->intr_ctrl_stat
) & ~0x0900);
3796 plx_init(pdev
, irq
, addr0
);
3798 mailbox
= readl(&ctl_addr
->mail_box_0
);
3800 addr2
= ioremap_nocache(pci_resource_start(pdev
, 2),
3801 mailbox
== ZE_V1
? CyPCI_Ze_win
: CyPCI_Zwin
);
3802 if (addr2
== NULL
) {
3803 dev_err(&pdev
->dev
, "can't remap base region\n");
3807 if (mailbox
== ZE_V1
) {
3808 card_name
= "Cyclades-Ze";
3810 card_name
= "Cyclades-8Zo";
3812 if (mailbox
== ZO_V1
) {
3813 cy_writel(&ctl_addr
->loc_addr_base
, WIN_CREG
);
3814 dev_info(&pdev
->dev
, "Cyclades-8Zo/PCI: FPGA "
3815 "id %lx, ver %lx\n", (ulong
)(0xff &
3816 readl(&((struct CUSTOM_REG
*)addr2
)->
3817 fpga_id
)), (ulong
)(0xff &
3818 readl(&((struct CUSTOM_REG
*)addr2
)->
3820 cy_writel(&ctl_addr
->loc_addr_base
, WIN_RAM
);
3822 dev_info(&pdev
->dev
, "Cyclades-Z/PCI: New "
3823 "Cyclades-Z board. FPGA not loaded\n");
3826 /* The following clears the firmware id word. This
3827 ensures that the driver will not attempt to talk to
3828 the board until it has been properly initialized.
3830 if ((mailbox
== ZO_V1
) || (mailbox
== ZO_V2
))
3831 cy_writel(addr2
+ ID_ADDRESS
, 0L);
3834 retval
= cyz_load_fw(pdev
, addr2
, addr0
, irq
);
3840 if ((cy_next_channel
+ nchan
) > NR_PORTS
) {
3841 dev_err(&pdev
->dev
, "Cyclades-8Zo/PCI found, but no "
3842 "channels are available. Change NR_PORTS in "
3843 "cyclades.c and recompile kernel.\n");
3846 /* fill the next cy_card structure available */
3847 for (card_no
= 0; card_no
< NR_CARDS
; card_no
++) {
3848 if (cy_card
[card_no
].base_addr
== NULL
)
3851 if (card_no
== NR_CARDS
) { /* no more cy_cards available */
3852 dev_err(&pdev
->dev
, "Cyclades-8Zo/PCI found, but no "
3853 "more cards can be used. Change NR_CARDS in "
3854 "cyclades.c and recompile kernel.\n");
3858 if (device_id
== PCI_DEVICE_ID_CYCLOM_Y_Lo
||
3859 device_id
== PCI_DEVICE_ID_CYCLOM_Y_Hi
) {
3861 retval
= request_irq(irq
, cyy_interrupt
,
3862 IRQF_SHARED
, "Cyclom-Y", &cy_card
[card_no
]);
3864 dev_err(&pdev
->dev
, "could not allocate IRQ\n");
3867 cy_card
[card_no
].num_chips
= nchan
/ CyPORTS_PER_CHIP
;
3869 struct FIRM_ID __iomem
*firm_id
= addr2
+ ID_ADDRESS
;
3870 struct ZFW_CTRL __iomem
*zfw_ctrl
;
3872 zfw_ctrl
= addr2
+ (readl(&firm_id
->zfwctrl_addr
) & 0xfffff);
3874 cy_card
[card_no
].hw_ver
= mailbox
;
3875 cy_card
[card_no
].num_chips
= (unsigned int)-1;
3876 cy_card
[card_no
].board_ctrl
= &zfw_ctrl
->board_ctrl
;
3877 #ifdef CONFIG_CYZ_INTR
3878 /* allocate IRQ only if board has an IRQ */
3879 if (irq
!= 0 && irq
!= 255) {
3880 retval
= request_irq(irq
, cyz_interrupt
,
3881 IRQF_SHARED
, "Cyclades-Z",
3884 dev_err(&pdev
->dev
, "could not allocate IRQ\n");
3888 #endif /* CONFIG_CYZ_INTR */
3892 cy_card
[card_no
].base_addr
= addr2
;
3893 cy_card
[card_no
].ctl_addr
.p9050
= addr0
;
3894 cy_card
[card_no
].irq
= irq
;
3895 cy_card
[card_no
].bus_index
= 1;
3896 cy_card
[card_no
].first_line
= cy_next_channel
;
3897 cy_card
[card_no
].nports
= nchan
;
3898 retval
= cy_init_card(&cy_card
[card_no
]);
3902 pci_set_drvdata(pdev
, &cy_card
[card_no
]);
3904 if (device_id
== PCI_DEVICE_ID_CYCLOM_Y_Lo
||
3905 device_id
== PCI_DEVICE_ID_CYCLOM_Y_Hi
) {
3906 /* enable interrupts in the PCI interface */
3907 plx_ver
= readb(addr2
+ CyPLX_VER
) & 0x0f;
3910 cy_writeb(addr0
+ 0x4c, 0x43);
3915 default: /* Old boards, use PLX_9060 */
3917 struct RUNTIME_9060 __iomem
*ctl_addr
= addr0
;
3918 plx_init(pdev
, irq
, ctl_addr
);
3919 cy_writew(&ctl_addr
->intr_ctrl_stat
,
3920 readw(&ctl_addr
->intr_ctrl_stat
) | 0x0900);
3926 dev_info(&pdev
->dev
, "%s/PCI #%d found: %d channels starting from "
3927 "port %d.\n", card_name
, card_no
+ 1, nchan
, cy_next_channel
);
3928 for (i
= cy_next_channel
; i
< cy_next_channel
+ nchan
; i
++)
3929 tty_register_device(cy_serial_driver
, i
, &pdev
->dev
);
3930 cy_next_channel
+= nchan
;
3934 cy_card
[card_no
].base_addr
= NULL
;
3935 free_irq(irq
, &cy_card
[card_no
]);
3941 pci_release_regions(pdev
);
3943 pci_disable_device(pdev
);
3948 static void __devexit
cy_pci_remove(struct pci_dev
*pdev
)
3950 struct cyclades_card
*cinfo
= pci_get_drvdata(pdev
);
3953 /* non-Z with old PLX */
3954 if (!cy_is_Z(cinfo
) && (readb(cinfo
->base_addr
+ CyPLX_VER
) & 0x0f) ==
3956 cy_writeb(cinfo
->ctl_addr
.p9050
+ 0x4c, 0);
3958 #ifndef CONFIG_CYZ_INTR
3959 if (!cy_is_Z(cinfo
))
3961 cy_writew(&cinfo
->ctl_addr
.p9060
->intr_ctrl_stat
,
3962 readw(&cinfo
->ctl_addr
.p9060
->intr_ctrl_stat
) &
3965 iounmap(cinfo
->base_addr
);
3966 if (cinfo
->ctl_addr
.p9050
)
3967 iounmap(cinfo
->ctl_addr
.p9050
);
3969 #ifndef CONFIG_CYZ_INTR
3971 #endif /* CONFIG_CYZ_INTR */
3973 free_irq(cinfo
->irq
, cinfo
);
3974 pci_release_regions(pdev
);
3976 cinfo
->base_addr
= NULL
;
3977 for (i
= cinfo
->first_line
; i
< cinfo
->first_line
+
3979 tty_unregister_device(cy_serial_driver
, i
);
3981 kfree(cinfo
->ports
);
3984 static struct pci_driver cy_pci_driver
= {
3986 .id_table
= cy_pci_dev_id
,
3987 .probe
= cy_pci_probe
,
3988 .remove
= __devexit_p(cy_pci_remove
)
3992 static int cyclades_proc_show(struct seq_file
*m
, void *v
)
3994 struct cyclades_port
*info
;
3996 __u32 cur_jifs
= jiffies
;
3998 seq_puts(m
, "Dev TimeOpen BytesOut IdleOut BytesIn "
3999 "IdleIn Overruns Ldisc\n");
4001 /* Output one line for each known port */
4002 for (i
= 0; i
< NR_CARDS
; i
++)
4003 for (j
= 0; j
< cy_card
[i
].nports
; j
++) {
4004 info
= &cy_card
[i
].ports
[j
];
4006 if (info
->port
.count
) {
4007 /* XXX is the ldisc num worth this? */
4008 struct tty_struct
*tty
;
4009 struct tty_ldisc
*ld
;
4011 tty
= tty_port_tty_get(&info
->port
);
4013 ld
= tty_ldisc_ref(tty
);
4016 tty_ldisc_deref(ld
);
4020 seq_printf(m
, "%3d %8lu %10lu %8lu "
4021 "%10lu %8lu %9lu %6d\n", info
->line
,
4022 (cur_jifs
- info
->idle_stats
.in_use
) /
4023 HZ
, info
->idle_stats
.xmit_bytes
,
4024 (cur_jifs
- info
->idle_stats
.xmit_idle
)/
4025 HZ
, info
->idle_stats
.recv_bytes
,
4026 (cur_jifs
- info
->idle_stats
.recv_idle
)/
4027 HZ
, info
->idle_stats
.overruns
,
4030 seq_printf(m
, "%3d %8lu %10lu %8lu "
4031 "%10lu %8lu %9lu %6ld\n",
4032 info
->line
, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
4037 static int cyclades_proc_open(struct inode
*inode
, struct file
*file
)
4039 return single_open(file
, cyclades_proc_show
, NULL
);
4042 static const struct file_operations cyclades_proc_fops
= {
4043 .owner
= THIS_MODULE
,
4044 .open
= cyclades_proc_open
,
4046 .llseek
= seq_lseek
,
4047 .release
= single_release
,
4050 /* The serial driver boot-time initialization code!
4051 Hardware I/O ports are mapped to character special devices on a
4052 first found, first allocated manner. That is, this code searches
4053 for Cyclom cards in the system. As each is found, it is probed
4054 to discover how many chips (and thus how many ports) are present.
4055 These ports are mapped to the tty ports 32 and upward in monotonic
4056 fashion. If an 8-port card is replaced with a 16-port card, the
4057 port mapping on a following card will shift.
4059 This approach is different from what is used in the other serial
4060 device driver because the Cyclom is more properly a multiplexer,
4061 not just an aggregation of serial ports on one card.
4063 If there are more cards with more ports than have been
4064 statically allocated above, a warning is printed and the
4065 extra ports are ignored.
4068 static const struct tty_operations cy_ops
= {
4072 .put_char
= cy_put_char
,
4073 .flush_chars
= cy_flush_chars
,
4074 .write_room
= cy_write_room
,
4075 .chars_in_buffer
= cy_chars_in_buffer
,
4076 .flush_buffer
= cy_flush_buffer
,
4078 .throttle
= cy_throttle
,
4079 .unthrottle
= cy_unthrottle
,
4080 .set_termios
= cy_set_termios
,
4083 .hangup
= cy_hangup
,
4084 .break_ctl
= cy_break
,
4085 .wait_until_sent
= cy_wait_until_sent
,
4086 .tiocmget
= cy_tiocmget
,
4087 .tiocmset
= cy_tiocmset
,
4088 .proc_fops
= &cyclades_proc_fops
,
4091 static int __init
cy_init(void)
4093 unsigned int nboards
;
4094 int retval
= -ENOMEM
;
4096 cy_serial_driver
= alloc_tty_driver(NR_PORTS
);
4097 if (!cy_serial_driver
)
4100 printk(KERN_INFO
"Cyclades driver " CY_VERSION
" (built %s %s)\n",
4101 __DATE__
, __TIME__
);
4103 /* Initialize the tty_driver structure */
4105 cy_serial_driver
->owner
= THIS_MODULE
;
4106 cy_serial_driver
->driver_name
= "cyclades";
4107 cy_serial_driver
->name
= "ttyC";
4108 cy_serial_driver
->major
= CYCLADES_MAJOR
;
4109 cy_serial_driver
->minor_start
= 0;
4110 cy_serial_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
4111 cy_serial_driver
->subtype
= SERIAL_TYPE_NORMAL
;
4112 cy_serial_driver
->init_termios
= tty_std_termios
;
4113 cy_serial_driver
->init_termios
.c_cflag
=
4114 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
4115 cy_serial_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_DYNAMIC_DEV
;
4116 tty_set_operations(cy_serial_driver
, &cy_ops
);
4118 retval
= tty_register_driver(cy_serial_driver
);
4120 printk(KERN_ERR
"Couldn't register Cyclades serial driver\n");
4124 /* the code below is responsible to find the boards. Each different
4125 type of board has its own detection routine. If a board is found,
4126 the next cy_card structure available is set by the detection
4127 routine. These functions are responsible for checking the
4128 availability of cy_card and cy_port data structures and updating
4129 the cy_next_channel. */
4131 /* look for isa boards */
4132 nboards
= cy_detect_isa();
4135 /* look for pci boards */
4136 retval
= pci_register_driver(&cy_pci_driver
);
4137 if (retval
&& !nboards
) {
4138 tty_unregister_driver(cy_serial_driver
);
4145 put_tty_driver(cy_serial_driver
);
4150 static void __exit
cy_cleanup_module(void)
4152 struct cyclades_card
*card
;
4155 #ifndef CONFIG_CYZ_INTR
4156 del_timer_sync(&cyz_timerlist
);
4157 #endif /* CONFIG_CYZ_INTR */
4159 e1
= tty_unregister_driver(cy_serial_driver
);
4161 printk(KERN_ERR
"failed to unregister Cyclades serial "
4162 "driver(%d)\n", e1
);
4165 pci_unregister_driver(&cy_pci_driver
);
4168 for (i
= 0; i
< NR_CARDS
; i
++) {
4170 if (card
->base_addr
) {
4171 /* clear interrupt */
4172 cy_writeb(card
->base_addr
+ Cy_ClrIntr
, 0);
4173 iounmap(card
->base_addr
);
4174 if (card
->ctl_addr
.p9050
)
4175 iounmap(card
->ctl_addr
.p9050
);
4177 #ifndef CONFIG_CYZ_INTR
4179 #endif /* CONFIG_CYZ_INTR */
4181 free_irq(card
->irq
, card
);
4182 for (e1
= card
->first_line
; e1
< card
->first_line
+
4184 tty_unregister_device(cy_serial_driver
, e1
);
4189 put_tty_driver(cy_serial_driver
);
4190 } /* cy_cleanup_module */
4192 module_init(cy_init
);
4193 module_exit(cy_cleanup_module
);
4195 MODULE_LICENSE("GPL");
4196 MODULE_VERSION(CY_VERSION
);
4197 MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR
);
4198 MODULE_FIRMWARE("cyzfirm.bin");