1 // SPDX-License-Identifier: GPL-2.0
2 #undef BLOCKMOVE
3 #define Z_WAKE
4 #undef Z_EXT_CHARS_IN_BUFFER
5
6 /*
7 * This file contains the driver for the Cyclades async multiport
8 * serial boards.
9 *
10 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
11 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
12 *
13 * Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com>
14 *
15 * Much of the design and some of the code came from serial.c
16 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
17 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
18 * and then fixed as suggested by Michael K. Johnson 12/12/92.
19 * Converted to pci probing and cleaned up by Jiri Slaby.
20 *
21 */
22
23 #define CY_VERSION "2.6"
24
25 /* If you need to install more boards than NR_CARDS, change the constant
26 in the definition below. No other change is necessary to support up to
27 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
28
29 #define NR_CARDS 4
30
31 /*
32 If the total number of ports is larger than NR_PORTS, change this
33 constant in the definition below. No other change is necessary to
34 support more boards/ports. */
35
36 #define NR_PORTS 256
37
38 #define ZO_V1 0
39 #define ZO_V2 1
40 #define ZE_V1 2
41
42 #define SERIAL_PARANOIA_CHECK
43 #undef CY_DEBUG_OPEN
44 #undef CY_DEBUG_THROTTLE
45 #undef CY_DEBUG_OTHER
46 #undef CY_DEBUG_IO
47 #undef CY_DEBUG_COUNT
48 #undef CY_DEBUG_DTR
49 #undef CY_DEBUG_INTERRUPTS
50 #undef CY_16Y_HACK
51 #undef CY_ENABLE_MONITORING
52 #undef CY_PCI_DEBUG
53
54 /*
55 * Include section
56 */
57 #include <linux/module.h>
58 #include <linux/errno.h>
59 #include <linux/signal.h>
60 #include <linux/sched.h>
61 #include <linux/timer.h>
62 #include <linux/interrupt.h>
63 #include <linux/tty.h>
64 #include <linux/tty_flip.h>
65 #include <linux/serial.h>
66 #include <linux/major.h>
67 #include <linux/string.h>
68 #include <linux/fcntl.h>
69 #include <linux/ptrace.h>
70 #include <linux/cyclades.h>
71 #include <linux/mm.h>
72 #include <linux/ioport.h>
73 #include <linux/init.h>
74 #include <linux/delay.h>
75 #include <linux/spinlock.h>
76 #include <linux/bitops.h>
77 #include <linux/firmware.h>
78 #include <linux/device.h>
79 #include <linux/slab.h>
80
81 #include <linux/io.h>
82 #include <linux/uaccess.h>
83
84 #include <linux/kernel.h>
85 #include <linux/pci.h>
86
87 #include <linux/stat.h>
88 #include <linux/proc_fs.h>
89 #include <linux/seq_file.h>
90
91 static void cy_send_xchar(struct tty_struct *tty, char ch);
92
93 #ifndef SERIAL_XMIT_SIZE
94 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
95 #endif
96
97 /* firmware stuff */
98 #define ZL_MAX_BLOCKS 16
99 #define DRIVER_VERSION 0x02010203
100 #define RAM_SIZE 0x80000
101
102 enum zblock_type {
103 ZBLOCK_PRG = 0,
104 ZBLOCK_FPGA = 1
105 };
106
107 struct zfile_header {
108 char name[64];
109 char date[32];
110 char aux[32];
111 u32 n_config;
112 u32 config_offset;
113 u32 n_blocks;
114 u32 block_offset;
115 u32 reserved[9];
116 } __attribute__ ((packed));
117
118 struct zfile_config {
119 char name[64];
120 u32 mailbox;
121 u32 function;
122 u32 n_blocks;
123 u32 block_list[ZL_MAX_BLOCKS];
124 } __attribute__ ((packed));
125
126 struct zfile_block {
127 u32 type;
128 u32 file_offset;
129 u32 ram_offset;
130 u32 size;
131 } __attribute__ ((packed));
132
133 static struct tty_driver *cy_serial_driver;
134
135 #ifdef CONFIG_ISA
136 /* This is the address lookup table. The driver will probe for
137 Cyclom-Y/ISA boards at all addresses in here. If you want the
138 driver to probe addresses at a different address, add it to
139 this table. If the driver is probing some other board and
140 causing problems, remove the offending address from this table.
141 */
142
143 static unsigned int cy_isa_addresses[] = {
144 0xD0000,
145 0xD2000,
146 0xD4000,
147 0xD6000,
148 0xD8000,
149 0xDA000,
150 0xDC000,
151 0xDE000,
152 0, 0, 0, 0, 0, 0, 0, 0
153 };
154
155 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
156
157 static long maddr[NR_CARDS];
158 static int irq[NR_CARDS];
159
160 module_param_hw_array(maddr, long, iomem, NULL, 0);
161 module_param_hw_array(irq, int, irq, NULL, 0);
162
163 #endif /* CONFIG_ISA */
164
165 /* This is the per-card data structure containing address, irq, number of
166 channels, etc. This driver supports a maximum of NR_CARDS cards.
167 */
168 static struct cyclades_card cy_card[NR_CARDS];
169
170 static int cy_next_channel; /* next minor available */
171
172 /*
173 * This is used to look up the divisor speeds and the timeouts
174 * We're normally limited to 15 distinct baud rates. The extra
175 * are accessed via settings in info->port.flags.
176 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
177 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
178 * HI VHI
179 * 20
180 */
181 static const int baud_table[] = {
182 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
183 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
184 230400, 0
185 };
186
187 static const char baud_co_25[] = { /* 25 MHz clock option table */
188 /* value => 00 01 02 03 04 */
189 /* divide by 8 32 128 512 2048 */
190 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
191 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
192 };
193
194 static const char baud_bpr_25[] = { /* 25 MHz baud rate period table */
195 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
196 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
197 };
198
199 static const char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
200 /* value => 00 01 02 03 04 */
201 /* divide by 8 32 128 512 2048 */
202 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
203 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
204 0x00
205 };
206
207 static const char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
208 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
209 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
210 0x21
211 };
212
213 static const char baud_cor3[] = { /* receive threshold */
214 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
215 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
216 0x07
217 };
218
219 /*
220 * The Cyclades driver implements HW flow control as any serial driver.
221 * The cyclades_port structure member rflow and the vector rflow_thr
222 * allows us to take advantage of a special feature in the CD1400 to avoid
223 * data loss even when the system interrupt latency is too high. These flags
224 * are to be used only with very special applications. Setting these flags
225 * requires the use of a special cable (DTR and RTS reversed). In the new
226 * CD1400-based boards (rev. 6.00 or later), there is no need for special
227 * cables.
228 */
229
230 static const char rflow_thr[] = { /* rflow threshold */
231 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
232 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
233 0x0a
234 };
235
236 /* The Cyclom-Ye has placed the sequential chips in non-sequential
237 * address order. This look-up table overcomes that problem.
238 */
239 static const unsigned int cy_chip_offset[] = { 0x0000,
240 0x0400,
241 0x0800,
242 0x0C00,
243 0x0200,
244 0x0600,
245 0x0A00,
246 0x0E00
247 };
248
249 /* PCI related definitions */
250
251 #ifdef CONFIG_PCI
252 static const struct pci_device_id cy_pci_dev_id[] = {
253 /* PCI < 1Mb */
254 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
255 /* PCI > 1Mb */
256 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
257 /* 4Y PCI < 1Mb */
258 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
259 /* 4Y PCI > 1Mb */
260 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
261 /* 8Y PCI < 1Mb */
262 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
263 /* 8Y PCI > 1Mb */
264 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
265 /* Z PCI < 1Mb */
266 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
267 /* Z PCI > 1Mb */
268 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
269 { } /* end of table */
270 };
271 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
272 #endif
273
274 static void cy_start(struct tty_struct *);
275 static void cy_set_line_char(struct cyclades_port *, struct tty_struct *);
276 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
277 #ifdef CONFIG_ISA
278 static unsigned detect_isa_irq(void __iomem *);
279 #endif /* CONFIG_ISA */
280
281 #ifndef CONFIG_CYZ_INTR
282 static void cyz_poll(struct timer_list *);
283
284 /* The Cyclades-Z polling cycle is defined by this variable */
285 static long cyz_polling_cycle = CZ_DEF_POLL;
286
287 static DEFINE_TIMER(cyz_timerlist, cyz_poll);
288
289 #else /* CONFIG_CYZ_INTR */
290 static void cyz_rx_restart(struct timer_list *);
291 #endif /* CONFIG_CYZ_INTR */
292
cyy_writeb(struct cyclades_port * port,u32 reg,u8 val)293 static void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
294 {
295 struct cyclades_card *card = port->card;
296
297 cy_writeb(port->u.cyy.base_addr + (reg << card->bus_index), val);
298 }
299
cyy_readb(struct cyclades_port * port,u32 reg)300 static u8 cyy_readb(struct cyclades_port *port, u32 reg)
301 {
302 struct cyclades_card *card = port->card;
303
304 return readb(port->u.cyy.base_addr + (reg << card->bus_index));
305 }
306
cy_is_Z(struct cyclades_card * card)307 static inline bool cy_is_Z(struct cyclades_card *card)
308 {
309 return card->num_chips == (unsigned int)-1;
310 }
311
__cyz_fpga_loaded(struct RUNTIME_9060 __iomem * ctl_addr)312 static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
313 {
314 return readl(&ctl_addr->init_ctrl) & (1 << 17);
315 }
316
cyz_fpga_loaded(struct cyclades_card * card)317 static inline bool cyz_fpga_loaded(struct cyclades_card *card)
318 {
319 return __cyz_fpga_loaded(card->ctl_addr.p9060);
320 }
321
cyz_is_loaded(struct cyclades_card * card)322 static bool cyz_is_loaded(struct cyclades_card *card)
323 {
324 struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
325
326 return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
327 readl(&fw_id->signature) == ZFIRM_ID;
328 }
329
serial_paranoia_check(struct cyclades_port * info,const char * name,const char * routine)330 static int serial_paranoia_check(struct cyclades_port *info,
331 const char *name, const char *routine)
332 {
333 #ifdef SERIAL_PARANOIA_CHECK
334 if (!info) {
335 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
336 "in %s\n", name, routine);
337 return 1;
338 }
339
340 if (info->magic != CYCLADES_MAGIC) {
341 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
342 "struct (%s) in %s\n", name, routine);
343 return 1;
344 }
345 #endif
346 return 0;
347 }
348
349 /***********************************************************/
350 /********* Start of block of Cyclom-Y specific code ********/
351
352 /* This routine waits up to 1000 micro-seconds for the previous
353 command to the Cirrus chip to complete and then issues the
354 new command. An error is returned if the previous command
355 didn't finish within the time limit.
356
357 This function is only called from inside spinlock-protected code.
358 */
__cyy_issue_cmd(void __iomem * base_addr,u8 cmd,int index)359 static int __cyy_issue_cmd(void __iomem *base_addr, u8 cmd, int index)
360 {
361 void __iomem *ccr = base_addr + (CyCCR << index);
362 unsigned int i;
363
364 /* Check to see that the previous command has completed */
365 for (i = 0; i < 100; i++) {
366 if (readb(ccr) == 0)
367 break;
368 udelay(10L);
369 }
370 /* if the CCR never cleared, the previous command
371 didn't finish within the "reasonable time" */
372 if (i == 100)
373 return -1;
374
375 /* Issue the new command */
376 cy_writeb(ccr, cmd);
377
378 return 0;
379 }
380
cyy_issue_cmd(struct cyclades_port * port,u8 cmd)381 static inline int cyy_issue_cmd(struct cyclades_port *port, u8 cmd)
382 {
383 return __cyy_issue_cmd(port->u.cyy.base_addr, cmd,
384 port->card->bus_index);
385 }
386
387 #ifdef CONFIG_ISA
388 /* ISA interrupt detection code */
detect_isa_irq(void __iomem * address)389 static unsigned detect_isa_irq(void __iomem *address)
390 {
391 int irq;
392 unsigned long irqs, flags;
393 int save_xir, save_car;
394 int index = 0; /* IRQ probing is only for ISA */
395
396 /* forget possible initially masked and pending IRQ */
397 irq = probe_irq_off(probe_irq_on());
398
399 /* Clear interrupts on the board first */
400 cy_writeb(address + (Cy_ClrIntr << index), 0);
401 /* Cy_ClrIntr is 0x1800 */
402
403 irqs = probe_irq_on();
404 /* Wait ... */
405 msleep(5);
406
407 /* Enable the Tx interrupts on the CD1400 */
408 local_irq_save(flags);
409 cy_writeb(address + (CyCAR << index), 0);
410 __cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
411
412 cy_writeb(address + (CyCAR << index), 0);
413 cy_writeb(address + (CySRER << index),
414 readb(address + (CySRER << index)) | CyTxRdy);
415 local_irq_restore(flags);
416
417 /* Wait ... */
418 msleep(5);
419
420 /* Check which interrupt is in use */
421 irq = probe_irq_off(irqs);
422
423 /* Clean up */
424 save_xir = (u_char) readb(address + (CyTIR << index));
425 save_car = readb(address + (CyCAR << index));
426 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
427 cy_writeb(address + (CySRER << index),
428 readb(address + (CySRER << index)) & ~CyTxRdy);
429 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
430 cy_writeb(address + (CyCAR << index), (save_car));
431 cy_writeb(address + (Cy_ClrIntr << index), 0);
432 /* Cy_ClrIntr is 0x1800 */
433
434 return (irq > 0) ? irq : 0;
435 }
436 #endif /* CONFIG_ISA */
437
cyy_chip_rx(struct cyclades_card * cinfo,int chip,void __iomem * base_addr)438 static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
439 void __iomem *base_addr)
440 {
441 struct cyclades_port *info;
442 struct tty_port *port;
443 int len, index = cinfo->bus_index;
444 u8 ivr, save_xir, channel, save_car, data, char_count;
445
446 #ifdef CY_DEBUG_INTERRUPTS
447 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
448 #endif
449 /* determine the channel & change to that context */
450 save_xir = readb(base_addr + (CyRIR << index));
451 channel = save_xir & CyIRChannel;
452 info = &cinfo->ports[channel + chip * 4];
453 port = &info->port;
454 save_car = cyy_readb(info, CyCAR);
455 cyy_writeb(info, CyCAR, save_xir);
456 ivr = cyy_readb(info, CyRIVR) & CyIVRMask;
457
458 /* there is an open port for this data */
459 if (ivr == CyIVRRxEx) { /* exception */
460 data = cyy_readb(info, CyRDSR);
461
462 /* For statistics only */
463 if (data & CyBREAK)
464 info->icount.brk++;
465 else if (data & CyFRAME)
466 info->icount.frame++;
467 else if (data & CyPARITY)
468 info->icount.parity++;
469 else if (data & CyOVERRUN)
470 info->icount.overrun++;
471
472 if (data & info->ignore_status_mask) {
473 info->icount.rx++;
474 return;
475 }
476 if (tty_buffer_request_room(port, 1)) {
477 if (data & info->read_status_mask) {
478 if (data & CyBREAK) {
479 tty_insert_flip_char(port,
480 cyy_readb(info, CyRDSR),
481 TTY_BREAK);
482 info->icount.rx++;
483 if (port->flags & ASYNC_SAK) {
484 struct tty_struct *tty =
485 tty_port_tty_get(port);
486 if (tty) {
487 do_SAK(tty);
488 tty_kref_put(tty);
489 }
490 }
491 } else if (data & CyFRAME) {
492 tty_insert_flip_char(port,
493 cyy_readb(info, CyRDSR),
494 TTY_FRAME);
495 info->icount.rx++;
496 info->idle_stats.frame_errs++;
497 } else if (data & CyPARITY) {
498 /* Pieces of seven... */
499 tty_insert_flip_char(port,
500 cyy_readb(info, CyRDSR),
501 TTY_PARITY);
502 info->icount.rx++;
503 info->idle_stats.parity_errs++;
504 } else if (data & CyOVERRUN) {
505 tty_insert_flip_char(port, 0,
506 TTY_OVERRUN);
507 info->icount.rx++;
508 /* If the flip buffer itself is
509 overflowing, we still lose
510 the next incoming character.
511 */
512 tty_insert_flip_char(port,
513 cyy_readb(info, CyRDSR),
514 TTY_FRAME);
515 info->icount.rx++;
516 info->idle_stats.overruns++;
517 /* These two conditions may imply */
518 /* a normal read should be done. */
519 /* } else if(data & CyTIMEOUT) { */
520 /* } else if(data & CySPECHAR) { */
521 } else {
522 tty_insert_flip_char(port, 0,
523 TTY_NORMAL);
524 info->icount.rx++;
525 }
526 } else {
527 tty_insert_flip_char(port, 0, TTY_NORMAL);
528 info->icount.rx++;
529 }
530 } else {
531 /* there was a software buffer overrun and nothing
532 * could be done about it!!! */
533 info->icount.buf_overrun++;
534 info->idle_stats.overruns++;
535 }
536 } else { /* normal character reception */
537 /* load # chars available from the chip */
538 char_count = cyy_readb(info, CyRDCR);
539
540 #ifdef CY_ENABLE_MONITORING
541 ++info->mon.int_count;
542 info->mon.char_count += char_count;
543 if (char_count > info->mon.char_max)
544 info->mon.char_max = char_count;
545 info->mon.char_last = char_count;
546 #endif
547 len = tty_buffer_request_room(port, char_count);
548 while (len--) {
549 data = cyy_readb(info, CyRDSR);
550 tty_insert_flip_char(port, data, TTY_NORMAL);
551 info->idle_stats.recv_bytes++;
552 info->icount.rx++;
553 #ifdef CY_16Y_HACK
554 udelay(10L);
555 #endif
556 }
557 info->idle_stats.recv_idle = jiffies;
558 }
559 tty_schedule_flip(port);
560
561 /* end of service */
562 cyy_writeb(info, CyRIR, save_xir & 0x3f);
563 cyy_writeb(info, CyCAR, save_car);
564 }
565
cyy_chip_tx(struct cyclades_card * cinfo,unsigned int chip,void __iomem * base_addr)566 static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
567 void __iomem *base_addr)
568 {
569 struct cyclades_port *info;
570 struct tty_struct *tty;
571 int char_count, index = cinfo->bus_index;
572 u8 save_xir, channel, save_car, outch;
573
574 /* Since we only get here when the transmit buffer
575 is empty, we know we can always stuff a dozen
576 characters. */
577 #ifdef CY_DEBUG_INTERRUPTS
578 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
579 #endif
580
581 /* determine the channel & change to that context */
582 save_xir = readb(base_addr + (CyTIR << index));
583 channel = save_xir & CyIRChannel;
584 save_car = readb(base_addr + (CyCAR << index));
585 cy_writeb(base_addr + (CyCAR << index), save_xir);
586
587 info = &cinfo->ports[channel + chip * 4];
588 tty = tty_port_tty_get(&info->port);
589 if (tty == NULL) {
590 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
591 goto end;
592 }
593
594 /* load the on-chip space for outbound data */
595 char_count = info->xmit_fifo_size;
596
597 if (info->x_char) { /* send special char */
598 outch = info->x_char;
599 cyy_writeb(info, CyTDR, outch);
600 char_count--;
601 info->icount.tx++;
602 info->x_char = 0;
603 }
604
605 if (info->breakon || info->breakoff) {
606 if (info->breakon) {
607 cyy_writeb(info, CyTDR, 0);
608 cyy_writeb(info, CyTDR, 0x81);
609 info->breakon = 0;
610 char_count -= 2;
611 }
612 if (info->breakoff) {
613 cyy_writeb(info, CyTDR, 0);
614 cyy_writeb(info, CyTDR, 0x83);
615 info->breakoff = 0;
616 char_count -= 2;
617 }
618 }
619
620 while (char_count-- > 0) {
621 if (!info->xmit_cnt) {
622 if (cyy_readb(info, CySRER) & CyTxMpty) {
623 cyy_writeb(info, CySRER,
624 cyy_readb(info, CySRER) & ~CyTxMpty);
625 } else {
626 cyy_writeb(info, CySRER, CyTxMpty |
627 (cyy_readb(info, CySRER) & ~CyTxRdy));
628 }
629 goto done;
630 }
631 if (info->port.xmit_buf == NULL) {
632 cyy_writeb(info, CySRER,
633 cyy_readb(info, CySRER) & ~CyTxRdy);
634 goto done;
635 }
636 if (tty->stopped || tty->hw_stopped) {
637 cyy_writeb(info, CySRER,
638 cyy_readb(info, CySRER) & ~CyTxRdy);
639 goto done;
640 }
641 /* Because the Embedded Transmit Commands have been enabled,
642 * we must check to see if the escape character, NULL, is being
643 * sent. If it is, we must ensure that there is room for it to
644 * be doubled in the output stream. Therefore we no longer
645 * advance the pointer when the character is fetched, but
646 * rather wait until after the check for a NULL output
647 * character. This is necessary because there may not be room
648 * for the two chars needed to send a NULL.)
649 */
650 outch = info->port.xmit_buf[info->xmit_tail];
651 if (outch) {
652 info->xmit_cnt--;
653 info->xmit_tail = (info->xmit_tail + 1) &
654 (SERIAL_XMIT_SIZE - 1);
655 cyy_writeb(info, CyTDR, outch);
656 info->icount.tx++;
657 } else {
658 if (char_count > 1) {
659 info->xmit_cnt--;
660 info->xmit_tail = (info->xmit_tail + 1) &
661 (SERIAL_XMIT_SIZE - 1);
662 cyy_writeb(info, CyTDR, outch);
663 cyy_writeb(info, CyTDR, 0);
664 info->icount.tx++;
665 char_count--;
666 }
667 }
668 }
669
670 done:
671 tty_wakeup(tty);
672 tty_kref_put(tty);
673 end:
674 /* end of service */
675 cyy_writeb(info, CyTIR, save_xir & 0x3f);
676 cyy_writeb(info, CyCAR, save_car);
677 }
678
cyy_chip_modem(struct cyclades_card * cinfo,int chip,void __iomem * base_addr)679 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
680 void __iomem *base_addr)
681 {
682 struct cyclades_port *info;
683 struct tty_struct *tty;
684 int index = cinfo->bus_index;
685 u8 save_xir, channel, save_car, mdm_change, mdm_status;
686
687 /* determine the channel & change to that context */
688 save_xir = readb(base_addr + (CyMIR << index));
689 channel = save_xir & CyIRChannel;
690 info = &cinfo->ports[channel + chip * 4];
691 save_car = cyy_readb(info, CyCAR);
692 cyy_writeb(info, CyCAR, save_xir);
693
694 mdm_change = cyy_readb(info, CyMISR);
695 mdm_status = cyy_readb(info, CyMSVR1);
696
697 tty = tty_port_tty_get(&info->port);
698 if (!tty)
699 goto end;
700
701 if (mdm_change & CyANY_DELTA) {
702 /* For statistics only */
703 if (mdm_change & CyDCD)
704 info->icount.dcd++;
705 if (mdm_change & CyCTS)
706 info->icount.cts++;
707 if (mdm_change & CyDSR)
708 info->icount.dsr++;
709 if (mdm_change & CyRI)
710 info->icount.rng++;
711
712 wake_up_interruptible(&info->port.delta_msr_wait);
713 }
714
715 if ((mdm_change & CyDCD) && tty_port_check_carrier(&info->port)) {
716 if (mdm_status & CyDCD)
717 wake_up_interruptible(&info->port.open_wait);
718 else
719 tty_hangup(tty);
720 }
721 if ((mdm_change & CyCTS) && tty_port_cts_enabled(&info->port)) {
722 if (tty->hw_stopped) {
723 if (mdm_status & CyCTS) {
724 /* cy_start isn't used
725 because... !!! */
726 tty->hw_stopped = 0;
727 cyy_writeb(info, CySRER,
728 cyy_readb(info, CySRER) | CyTxRdy);
729 tty_wakeup(tty);
730 }
731 } else {
732 if (!(mdm_status & CyCTS)) {
733 /* cy_stop isn't used
734 because ... !!! */
735 tty->hw_stopped = 1;
736 cyy_writeb(info, CySRER,
737 cyy_readb(info, CySRER) & ~CyTxRdy);
738 }
739 }
740 }
741 /* if (mdm_change & CyDSR) {
742 }
743 if (mdm_change & CyRI) {
744 }*/
745 tty_kref_put(tty);
746 end:
747 /* end of service */
748 cyy_writeb(info, CyMIR, save_xir & 0x3f);
749 cyy_writeb(info, CyCAR, save_car);
750 }
751
752 /* The real interrupt service routine is called
753 whenever the card wants its hand held--chars
754 received, out buffer empty, modem change, etc.
755 */
cyy_interrupt(int irq,void * dev_id)756 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
757 {
758 int status;
759 struct cyclades_card *cinfo = dev_id;
760 void __iomem *base_addr, *card_base_addr;
761 unsigned int chip, too_many, had_work;
762 int index;
763
764 if (unlikely(cinfo == NULL)) {
765 #ifdef CY_DEBUG_INTERRUPTS
766 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
767 irq);
768 #endif
769 return IRQ_NONE; /* spurious interrupt */
770 }
771
772 card_base_addr = cinfo->base_addr;
773 index = cinfo->bus_index;
774
775 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
776 if (unlikely(card_base_addr == NULL))
777 return IRQ_HANDLED;
778
779 /* This loop checks all chips in the card. Make a note whenever
780 _any_ chip had some work to do, as this is considered an
781 indication that there will be more to do. Only when no chip
782 has any work does this outermost loop exit.
783 */
784 do {
785 had_work = 0;
786 for (chip = 0; chip < cinfo->num_chips; chip++) {
787 base_addr = cinfo->base_addr +
788 (cy_chip_offset[chip] << index);
789 too_many = 0;
790 while ((status = readb(base_addr +
791 (CySVRR << index))) != 0x00) {
792 had_work++;
793 /* The purpose of the following test is to ensure that
794 no chip can monopolize the driver. This forces the
795 chips to be checked in a round-robin fashion (after
796 draining each of a bunch (1000) of characters).
797 */
798 if (1000 < too_many++)
799 break;
800 spin_lock(&cinfo->card_lock);
801 if (status & CySRReceive) /* rx intr */
802 cyy_chip_rx(cinfo, chip, base_addr);
803 if (status & CySRTransmit) /* tx intr */
804 cyy_chip_tx(cinfo, chip, base_addr);
805 if (status & CySRModem) /* modem intr */
806 cyy_chip_modem(cinfo, chip, base_addr);
807 spin_unlock(&cinfo->card_lock);
808 }
809 }
810 } while (had_work);
811
812 /* clear interrupts */
813 spin_lock(&cinfo->card_lock);
814 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
815 /* Cy_ClrIntr is 0x1800 */
816 spin_unlock(&cinfo->card_lock);
817 return IRQ_HANDLED;
818 } /* cyy_interrupt */
819
cyy_change_rts_dtr(struct cyclades_port * info,unsigned int set,unsigned int clear)820 static void cyy_change_rts_dtr(struct cyclades_port *info, unsigned int set,
821 unsigned int clear)
822 {
823 struct cyclades_card *card = info->card;
824 int channel = info->line - card->first_line;
825 u32 rts, dtr, msvrr, msvrd;
826
827 channel &= 0x03;
828
829 if (info->rtsdtr_inv) {
830 msvrr = CyMSVR2;
831 msvrd = CyMSVR1;
832 rts = CyDTR;
833 dtr = CyRTS;
834 } else {
835 msvrr = CyMSVR1;
836 msvrd = CyMSVR2;
837 rts = CyRTS;
838 dtr = CyDTR;
839 }
840 if (set & TIOCM_RTS) {
841 cyy_writeb(info, CyCAR, channel);
842 cyy_writeb(info, msvrr, rts);
843 }
844 if (clear & TIOCM_RTS) {
845 cyy_writeb(info, CyCAR, channel);
846 cyy_writeb(info, msvrr, ~rts);
847 }
848 if (set & TIOCM_DTR) {
849 cyy_writeb(info, CyCAR, channel);
850 cyy_writeb(info, msvrd, dtr);
851 #ifdef CY_DEBUG_DTR
852 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
853 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
854 cyy_readb(info, CyMSVR1),
855 cyy_readb(info, CyMSVR2));
856 #endif
857 }
858 if (clear & TIOCM_DTR) {
859 cyy_writeb(info, CyCAR, channel);
860 cyy_writeb(info, msvrd, ~dtr);
861 #ifdef CY_DEBUG_DTR
862 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
863 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
864 cyy_readb(info, CyMSVR1),
865 cyy_readb(info, CyMSVR2));
866 #endif
867 }
868 }
869
870 /***********************************************************/
871 /********* End of block of Cyclom-Y specific code **********/
872 /******** Start of block of Cyclades-Z specific code *******/
873 /***********************************************************/
874
875 static int
cyz_fetch_msg(struct cyclades_card * cinfo,__u32 * channel,__u8 * cmd,__u32 * param)876 cyz_fetch_msg(struct cyclades_card *cinfo,
877 __u32 *channel, __u8 *cmd, __u32 *param)
878 {
879 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
880 unsigned long loc_doorbell;
881
882 loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
883 if (loc_doorbell) {
884 *cmd = (char)(0xff & loc_doorbell);
885 *channel = readl(&board_ctrl->fwcmd_channel);
886 *param = (__u32) readl(&board_ctrl->fwcmd_param);
887 cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
888 return 1;
889 }
890 return 0;
891 } /* cyz_fetch_msg */
892
893 static int
cyz_issue_cmd(struct cyclades_card * cinfo,__u32 channel,__u8 cmd,__u32 param)894 cyz_issue_cmd(struct cyclades_card *cinfo,
895 __u32 channel, __u8 cmd, __u32 param)
896 {
897 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
898 __u32 __iomem *pci_doorbell;
899 unsigned int index;
900
901 if (!cyz_is_loaded(cinfo))
902 return -1;
903
904 index = 0;
905 pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
906 while ((readl(pci_doorbell) & 0xff) != 0) {
907 if (index++ == 1000)
908 return (int)(readl(pci_doorbell) & 0xff);
909 udelay(50L);
910 }
911 cy_writel(&board_ctrl->hcmd_channel, channel);
912 cy_writel(&board_ctrl->hcmd_param, param);
913 cy_writel(pci_doorbell, (long)cmd);
914
915 return 0;
916 } /* cyz_issue_cmd */
917
cyz_handle_rx(struct cyclades_port * info)918 static void cyz_handle_rx(struct cyclades_port *info)
919 {
920 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
921 struct cyclades_card *cinfo = info->card;
922 struct tty_port *port = &info->port;
923 unsigned int char_count;
924 int len;
925 #ifdef BLOCKMOVE
926 unsigned char *buf;
927 #else
928 char data;
929 #endif
930 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
931
932 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
933 rx_put = readl(&buf_ctrl->rx_put);
934 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
935 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
936 if (rx_put >= rx_get)
937 char_count = rx_put - rx_get;
938 else
939 char_count = rx_put - rx_get + rx_bufsize;
940
941 if (!char_count)
942 return;
943
944 #ifdef CY_ENABLE_MONITORING
945 info->mon.int_count++;
946 info->mon.char_count += char_count;
947 if (char_count > info->mon.char_max)
948 info->mon.char_max = char_count;
949 info->mon.char_last = char_count;
950 #endif
951
952 #ifdef BLOCKMOVE
953 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
954 for performance, but because of buffer boundaries, there
955 may be several steps to the operation */
956 while (1) {
957 len = tty_prepare_flip_string(port, &buf,
958 char_count);
959 if (!len)
960 break;
961
962 len = min_t(unsigned int, min(len, char_count),
963 rx_bufsize - new_rx_get);
964
965 memcpy_fromio(buf, cinfo->base_addr +
966 rx_bufaddr + new_rx_get, len);
967
968 new_rx_get = (new_rx_get + len) &
969 (rx_bufsize - 1);
970 char_count -= len;
971 info->icount.rx += len;
972 info->idle_stats.recv_bytes += len;
973 }
974 #else
975 len = tty_buffer_request_room(port, char_count);
976 while (len--) {
977 data = readb(cinfo->base_addr + rx_bufaddr +
978 new_rx_get);
979 new_rx_get = (new_rx_get + 1) &
980 (rx_bufsize - 1);
981 tty_insert_flip_char(port, data, TTY_NORMAL);
982 info->idle_stats.recv_bytes++;
983 info->icount.rx++;
984 }
985 #endif
986 #ifdef CONFIG_CYZ_INTR
987 /* Recalculate the number of chars in the RX buffer and issue
988 a cmd in case it's higher than the RX high water mark */
989 rx_put = readl(&buf_ctrl->rx_put);
990 if (rx_put >= rx_get)
991 char_count = rx_put - rx_get;
992 else
993 char_count = rx_put - rx_get + rx_bufsize;
994 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
995 !timer_pending(&info->rx_full_timer))
996 mod_timer(&info->rx_full_timer, jiffies + 1);
997 #endif
998 info->idle_stats.recv_idle = jiffies;
999 tty_schedule_flip(&info->port);
1000
1001 /* Update rx_get */
1002 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1003 }
1004
cyz_handle_tx(struct cyclades_port * info)1005 static void cyz_handle_tx(struct cyclades_port *info)
1006 {
1007 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
1008 struct cyclades_card *cinfo = info->card;
1009 struct tty_struct *tty;
1010 u8 data;
1011 unsigned int char_count;
1012 #ifdef BLOCKMOVE
1013 int small_count;
1014 #endif
1015 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1016
1017 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1018 return;
1019
1020 tx_get = readl(&buf_ctrl->tx_get);
1021 tx_put = readl(&buf_ctrl->tx_put);
1022 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1023 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1024 if (tx_put >= tx_get)
1025 char_count = tx_get - tx_put - 1 + tx_bufsize;
1026 else
1027 char_count = tx_get - tx_put - 1;
1028
1029 if (!char_count)
1030 return;
1031
1032 tty = tty_port_tty_get(&info->port);
1033 if (tty == NULL)
1034 goto ztxdone;
1035
1036 if (info->x_char) { /* send special char */
1037 data = info->x_char;
1038
1039 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1040 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1041 info->x_char = 0;
1042 char_count--;
1043 info->icount.tx++;
1044 }
1045 #ifdef BLOCKMOVE
1046 while (0 < (small_count = min_t(unsigned int,
1047 tx_bufsize - tx_put, min_t(unsigned int,
1048 (SERIAL_XMIT_SIZE - info->xmit_tail),
1049 min_t(unsigned int, info->xmit_cnt,
1050 char_count))))) {
1051
1052 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + tx_put),
1053 &info->port.xmit_buf[info->xmit_tail],
1054 small_count);
1055
1056 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1057 char_count -= small_count;
1058 info->icount.tx += small_count;
1059 info->xmit_cnt -= small_count;
1060 info->xmit_tail = (info->xmit_tail + small_count) &
1061 (SERIAL_XMIT_SIZE - 1);
1062 }
1063 #else
1064 while (info->xmit_cnt && char_count) {
1065 data = info->port.xmit_buf[info->xmit_tail];
1066 info->xmit_cnt--;
1067 info->xmit_tail = (info->xmit_tail + 1) &
1068 (SERIAL_XMIT_SIZE - 1);
1069
1070 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1071 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1072 char_count--;
1073 info->icount.tx++;
1074 }
1075 #endif
1076 tty_wakeup(tty);
1077 tty_kref_put(tty);
1078 ztxdone:
1079 /* Update tx_put */
1080 cy_writel(&buf_ctrl->tx_put, tx_put);
1081 }
1082
cyz_handle_cmd(struct cyclades_card * cinfo)1083 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1084 {
1085 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
1086 struct cyclades_port *info;
1087 __u32 channel, param, fw_ver;
1088 __u8 cmd;
1089 int special_count;
1090 int delta_count;
1091
1092 fw_ver = readl(&board_ctrl->fw_version);
1093
1094 while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
1095 special_count = 0;
1096 delta_count = 0;
1097 info = &cinfo->ports[channel];
1098
1099 switch (cmd) {
1100 case C_CM_PR_ERROR:
1101 tty_insert_flip_char(&info->port, 0, TTY_PARITY);
1102 info->icount.rx++;
1103 special_count++;
1104 break;
1105 case C_CM_FR_ERROR:
1106 tty_insert_flip_char(&info->port, 0, TTY_FRAME);
1107 info->icount.rx++;
1108 special_count++;
1109 break;
1110 case C_CM_RXBRK:
1111 tty_insert_flip_char(&info->port, 0, TTY_BREAK);
1112 info->icount.rx++;
1113 special_count++;
1114 break;
1115 case C_CM_MDCD:
1116 info->icount.dcd++;
1117 delta_count++;
1118 if (tty_port_check_carrier(&info->port)) {
1119 u32 dcd = fw_ver > 241 ? param :
1120 readl(&info->u.cyz.ch_ctrl->rs_status);
1121 if (dcd & C_RS_DCD)
1122 wake_up_interruptible(&info->port.open_wait);
1123 else
1124 tty_port_tty_hangup(&info->port, false);
1125 }
1126 break;
1127 case C_CM_MCTS:
1128 info->icount.cts++;
1129 delta_count++;
1130 break;
1131 case C_CM_MRI:
1132 info->icount.rng++;
1133 delta_count++;
1134 break;
1135 case C_CM_MDSR:
1136 info->icount.dsr++;
1137 delta_count++;
1138 break;
1139 #ifdef Z_WAKE
1140 case C_CM_IOCTLW:
1141 complete(&info->shutdown_wait);
1142 break;
1143 #endif
1144 #ifdef CONFIG_CYZ_INTR
1145 case C_CM_RXHIWM:
1146 case C_CM_RXNNDT:
1147 case C_CM_INTBACK2:
1148 /* Reception Interrupt */
1149 #ifdef CY_DEBUG_INTERRUPTS
1150 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1151 "port %ld\n", info->card, channel);
1152 #endif
1153 cyz_handle_rx(info);
1154 break;
1155 case C_CM_TXBEMPTY:
1156 case C_CM_TXLOWWM:
1157 case C_CM_INTBACK:
1158 /* Transmission Interrupt */
1159 #ifdef CY_DEBUG_INTERRUPTS
1160 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1161 "port %ld\n", info->card, channel);
1162 #endif
1163 cyz_handle_tx(info);
1164 break;
1165 #endif /* CONFIG_CYZ_INTR */
1166 case C_CM_FATAL:
1167 /* should do something with this !!! */
1168 break;
1169 default:
1170 break;
1171 }
1172 if (delta_count)
1173 wake_up_interruptible(&info->port.delta_msr_wait);
1174 if (special_count)
1175 tty_schedule_flip(&info->port);
1176 }
1177 }
1178
1179 #ifdef CONFIG_CYZ_INTR
cyz_interrupt(int irq,void * dev_id)1180 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1181 {
1182 struct cyclades_card *cinfo = dev_id;
1183
1184 if (unlikely(!cyz_is_loaded(cinfo))) {
1185 #ifdef CY_DEBUG_INTERRUPTS
1186 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1187 "(IRQ%d).\n", irq);
1188 #endif
1189 return IRQ_NONE;
1190 }
1191
1192 /* Handle the interrupts */
1193 cyz_handle_cmd(cinfo);
1194
1195 return IRQ_HANDLED;
1196 } /* cyz_interrupt */
1197
cyz_rx_restart(struct timer_list * t)1198 static void cyz_rx_restart(struct timer_list *t)
1199 {
1200 struct cyclades_port *info = from_timer(info, t, rx_full_timer);
1201 struct cyclades_card *card = info->card;
1202 int retval;
1203 __u32 channel = info->line - card->first_line;
1204 unsigned long flags;
1205
1206 spin_lock_irqsave(&card->card_lock, flags);
1207 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1208 if (retval != 0) {
1209 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1210 info->line, retval);
1211 }
1212 spin_unlock_irqrestore(&card->card_lock, flags);
1213 }
1214
1215 #else /* CONFIG_CYZ_INTR */
1216
cyz_poll(struct timer_list * unused)1217 static void cyz_poll(struct timer_list *unused)
1218 {
1219 struct cyclades_card *cinfo;
1220 struct cyclades_port *info;
1221 unsigned long expires = jiffies + HZ;
1222 unsigned int port, card;
1223
1224 for (card = 0; card < NR_CARDS; card++) {
1225 cinfo = &cy_card[card];
1226
1227 if (!cy_is_Z(cinfo))
1228 continue;
1229 if (!cyz_is_loaded(cinfo))
1230 continue;
1231
1232 /* Skip first polling cycle to avoid racing conditions with the FW */
1233 if (!cinfo->intr_enabled) {
1234 cinfo->intr_enabled = 1;
1235 continue;
1236 }
1237
1238 cyz_handle_cmd(cinfo);
1239
1240 for (port = 0; port < cinfo->nports; port++) {
1241 info = &cinfo->ports[port];
1242
1243 if (!info->throttle)
1244 cyz_handle_rx(info);
1245 cyz_handle_tx(info);
1246 }
1247 /* poll every 'cyz_polling_cycle' period */
1248 expires = jiffies + cyz_polling_cycle;
1249 }
1250 mod_timer(&cyz_timerlist, expires);
1251 } /* cyz_poll */
1252
1253 #endif /* CONFIG_CYZ_INTR */
1254
1255 /********** End of block of Cyclades-Z specific code *********/
1256 /***********************************************************/
1257
1258 /* This is called whenever a port becomes active;
1259 interrupts are enabled and DTR & RTS are turned on.
1260 */
cy_startup(struct cyclades_port * info,struct tty_struct * tty)1261 static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
1262 {
1263 struct cyclades_card *card;
1264 unsigned long flags;
1265 int retval = 0;
1266 int channel;
1267 unsigned long page;
1268
1269 card = info->card;
1270 channel = info->line - card->first_line;
1271
1272 page = get_zeroed_page(GFP_KERNEL);
1273 if (!page)
1274 return -ENOMEM;
1275
1276 spin_lock_irqsave(&card->card_lock, flags);
1277
1278 if (tty_port_initialized(&info->port))
1279 goto errout;
1280
1281 if (!info->type) {
1282 set_bit(TTY_IO_ERROR, &tty->flags);
1283 goto errout;
1284 }
1285
1286 if (info->port.xmit_buf)
1287 free_page(page);
1288 else
1289 info->port.xmit_buf = (unsigned char *)page;
1290
1291 spin_unlock_irqrestore(&card->card_lock, flags);
1292
1293 cy_set_line_char(info, tty);
1294
1295 if (!cy_is_Z(card)) {
1296 channel &= 0x03;
1297
1298 spin_lock_irqsave(&card->card_lock, flags);
1299
1300 cyy_writeb(info, CyCAR, channel);
1301
1302 cyy_writeb(info, CyRTPR,
1303 (info->default_timeout ? info->default_timeout : 0x02));
1304 /* 10ms rx timeout */
1305
1306 cyy_issue_cmd(info, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR);
1307
1308 cyy_change_rts_dtr(info, TIOCM_RTS | TIOCM_DTR, 0);
1309
1310 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyRxData);
1311 } else {
1312 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
1313
1314 if (!cyz_is_loaded(card))
1315 return -ENODEV;
1316
1317 #ifdef CY_DEBUG_OPEN
1318 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1319 "base_addr %p\n", card, channel, card->base_addr);
1320 #endif
1321 spin_lock_irqsave(&card->card_lock, flags);
1322
1323 cy_writel(&ch_ctrl->op_mode, C_CH_ENABLE);
1324 #ifdef Z_WAKE
1325 #ifdef CONFIG_CYZ_INTR
1326 cy_writel(&ch_ctrl->intr_enable,
1327 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1328 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1329 #else
1330 cy_writel(&ch_ctrl->intr_enable,
1331 C_IN_IOCTLW | C_IN_MDCD);
1332 #endif /* CONFIG_CYZ_INTR */
1333 #else
1334 #ifdef CONFIG_CYZ_INTR
1335 cy_writel(&ch_ctrl->intr_enable,
1336 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1337 C_IN_RXNNDT | C_IN_MDCD);
1338 #else
1339 cy_writel(&ch_ctrl->intr_enable, C_IN_MDCD);
1340 #endif /* CONFIG_CYZ_INTR */
1341 #endif /* Z_WAKE */
1342
1343 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1344 if (retval != 0) {
1345 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1346 "%x\n", info->line, retval);
1347 }
1348
1349 /* Flush RX buffers before raising DTR and RTS */
1350 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1351 if (retval != 0) {
1352 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1353 "%x\n", info->line, retval);
1354 }
1355
1356 /* set timeout !!! */
1357 /* set RTS and DTR !!! */
1358 tty_port_raise_dtr_rts(&info->port);
1359
1360 /* enable send, recv, modem !!! */
1361 }
1362
1363 tty_port_set_initialized(&info->port, 1);
1364
1365 clear_bit(TTY_IO_ERROR, &tty->flags);
1366 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1367 info->breakon = info->breakoff = 0;
1368 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1369 info->idle_stats.in_use =
1370 info->idle_stats.recv_idle =
1371 info->idle_stats.xmit_idle = jiffies;
1372
1373 spin_unlock_irqrestore(&card->card_lock, flags);
1374
1375 #ifdef CY_DEBUG_OPEN
1376 printk(KERN_DEBUG "cyc startup done\n");
1377 #endif
1378 return 0;
1379
1380 errout:
1381 spin_unlock_irqrestore(&card->card_lock, flags);
1382 free_page(page);
1383 return retval;
1384 } /* startup */
1385
start_xmit(struct cyclades_port * info)1386 static void start_xmit(struct cyclades_port *info)
1387 {
1388 struct cyclades_card *card = info->card;
1389 unsigned long flags;
1390 int channel = info->line - card->first_line;
1391
1392 if (!cy_is_Z(card)) {
1393 spin_lock_irqsave(&card->card_lock, flags);
1394 cyy_writeb(info, CyCAR, channel & 0x03);
1395 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
1396 spin_unlock_irqrestore(&card->card_lock, flags);
1397 } else {
1398 #ifdef CONFIG_CYZ_INTR
1399 int retval;
1400
1401 spin_lock_irqsave(&card->card_lock, flags);
1402 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
1403 if (retval != 0) {
1404 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
1405 "%x\n", info->line, retval);
1406 }
1407 spin_unlock_irqrestore(&card->card_lock, flags);
1408 #else /* CONFIG_CYZ_INTR */
1409 /* Don't have to do anything at this time */
1410 #endif /* CONFIG_CYZ_INTR */
1411 }
1412 } /* start_xmit */
1413
1414 /*
1415 * This routine shuts down a serial port; interrupts are disabled,
1416 * and DTR is dropped if the hangup on close termio flag is on.
1417 */
cy_shutdown(struct cyclades_port * info,struct tty_struct * tty)1418 static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
1419 {
1420 struct cyclades_card *card;
1421 unsigned long flags;
1422
1423 if (!tty_port_initialized(&info->port))
1424 return;
1425
1426 card = info->card;
1427 if (!cy_is_Z(card)) {
1428 spin_lock_irqsave(&card->card_lock, flags);
1429
1430 /* Clear delta_msr_wait queue to avoid mem leaks. */
1431 wake_up_interruptible(&info->port.delta_msr_wait);
1432
1433 if (info->port.xmit_buf) {
1434 unsigned char *temp;
1435 temp = info->port.xmit_buf;
1436 info->port.xmit_buf = NULL;
1437 free_page((unsigned long)temp);
1438 }
1439 if (C_HUPCL(tty))
1440 cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR);
1441
1442 cyy_issue_cmd(info, CyCHAN_CTL | CyDIS_RCVR);
1443 /* it may be appropriate to clear _XMIT at
1444 some later date (after testing)!!! */
1445
1446 set_bit(TTY_IO_ERROR, &tty->flags);
1447 tty_port_set_initialized(&info->port, 0);
1448 spin_unlock_irqrestore(&card->card_lock, flags);
1449 } else {
1450 #ifdef CY_DEBUG_OPEN
1451 int channel = info->line - card->first_line;
1452 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
1453 "base_addr %p\n", card, channel, card->base_addr);
1454 #endif
1455
1456 if (!cyz_is_loaded(card))
1457 return;
1458
1459 spin_lock_irqsave(&card->card_lock, flags);
1460
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);
1466 }
1467
1468 if (C_HUPCL(tty))
1469 tty_port_lower_dtr_rts(&info->port);
1470
1471 set_bit(TTY_IO_ERROR, &tty->flags);
1472 tty_port_set_initialized(&info->port, 0);
1473
1474 spin_unlock_irqrestore(&card->card_lock, flags);
1475 }
1476
1477 #ifdef CY_DEBUG_OPEN
1478 printk(KERN_DEBUG "cyc shutdown done\n");
1479 #endif
1480 } /* shutdown */
1481
1482 /*
1483 * ------------------------------------------------------------
1484 * cy_open() and friends
1485 * ------------------------------------------------------------
1486 */
1487
1488 /*
1489 * This routine is called whenever a serial port is opened. It
1490 * performs the serial-specific initialization for the tty structure.
1491 */
cy_open(struct tty_struct * tty,struct file * filp)1492 static int cy_open(struct tty_struct *tty, struct file *filp)
1493 {
1494 struct cyclades_port *info;
1495 unsigned int i, line = tty->index;
1496 int retval;
1497
1498 for (i = 0; i < NR_CARDS; i++)
1499 if (line < cy_card[i].first_line + cy_card[i].nports &&
1500 line >= cy_card[i].first_line)
1501 break;
1502 if (i >= NR_CARDS)
1503 return -ENODEV;
1504 info = &cy_card[i].ports[line - cy_card[i].first_line];
1505 if (info->line < 0)
1506 return -ENODEV;
1507
1508 /* If the card's firmware hasn't been loaded,
1509 treat it as absent from the system. This
1510 will make the user pay attention.
1511 */
1512 if (cy_is_Z(info->card)) {
1513 struct cyclades_card *cinfo = info->card;
1514 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
1515
1516 if (!cyz_is_loaded(cinfo)) {
1517 if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
1518 readl(&firm_id->signature) ==
1519 ZFIRM_HLT) {
1520 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
1521 "need an external power supply for "
1522 "this number of ports.\nFirmware "
1523 "halted.\n");
1524 } else {
1525 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
1526 "yet loaded\n");
1527 }
1528 return -ENODEV;
1529 }
1530 #ifdef CONFIG_CYZ_INTR
1531 else {
1532 /* In case this Z board is operating in interrupt mode, its
1533 interrupts should be enabled as soon as the first open
1534 happens to one of its ports. */
1535 if (!cinfo->intr_enabled) {
1536 u16 intr;
1537
1538 /* Enable interrupts on the PLX chip */
1539 intr = readw(&cinfo->ctl_addr.p9060->
1540 intr_ctrl_stat) | 0x0900;
1541 cy_writew(&cinfo->ctl_addr.p9060->
1542 intr_ctrl_stat, intr);
1543 /* Enable interrupts on the FW */
1544 retval = cyz_issue_cmd(cinfo, 0,
1545 C_CM_IRQ_ENBL, 0L);
1546 if (retval != 0) {
1547 printk(KERN_ERR "cyc:IRQ enable retval "
1548 "was %x\n", retval);
1549 }
1550 cinfo->intr_enabled = 1;
1551 }
1552 }
1553 #endif /* CONFIG_CYZ_INTR */
1554 /* Make sure this Z port really exists in hardware */
1555 if (info->line > (cinfo->first_line + cinfo->nports - 1))
1556 return -ENODEV;
1557 }
1558 #ifdef CY_DEBUG_OTHER
1559 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
1560 #endif
1561 tty->driver_data = info;
1562 if (serial_paranoia_check(info, tty->name, "cy_open"))
1563 return -ENODEV;
1564
1565 #ifdef CY_DEBUG_OPEN
1566 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
1567 info->port.count);
1568 #endif
1569 info->port.count++;
1570 #ifdef CY_DEBUG_COUNT
1571 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
1572 current->pid, info->port.count);
1573 #endif
1574
1575 /*
1576 * Start up serial port
1577 */
1578 retval = cy_startup(info, tty);
1579 if (retval)
1580 return retval;
1581
1582 retval = tty_port_block_til_ready(&info->port, tty, filp);
1583 if (retval) {
1584 #ifdef CY_DEBUG_OPEN
1585 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
1586 "with %d\n", retval);
1587 #endif
1588 return retval;
1589 }
1590
1591 info->throttle = 0;
1592 tty_port_tty_set(&info->port, tty);
1593
1594 #ifdef CY_DEBUG_OPEN
1595 printk(KERN_DEBUG "cyc:cy_open done\n");
1596 #endif
1597 return 0;
1598 } /* cy_open */
1599
1600 /*
1601 * cy_wait_until_sent() --- wait until the transmitter is empty
1602 */
cy_wait_until_sent(struct tty_struct * tty,int timeout)1603 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1604 {
1605 struct cyclades_card *card;
1606 struct cyclades_port *info = tty->driver_data;
1607 unsigned long orig_jiffies;
1608 int char_time;
1609
1610 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
1611 return;
1612
1613 if (info->xmit_fifo_size == 0)
1614 return; /* Just in case.... */
1615
1616 orig_jiffies = jiffies;
1617 /*
1618 * Set the check interval to be 1/5 of the estimated time to
1619 * send a single character, and make it at least 1. The check
1620 * interval should also be less than the timeout.
1621 *
1622 * Note: we have to use pretty tight timings here to satisfy
1623 * the NIST-PCTS.
1624 */
1625 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1626 char_time = char_time / 5;
1627 if (char_time <= 0)
1628 char_time = 1;
1629 if (timeout < 0)
1630 timeout = 0;
1631 if (timeout)
1632 char_time = min(char_time, timeout);
1633 /*
1634 * If the transmitter hasn't cleared in twice the approximate
1635 * amount of time to send the entire FIFO, it probably won't
1636 * ever clear. This assumes the UART isn't doing flow
1637 * control, which is currently the case. Hence, if it ever
1638 * takes longer than info->timeout, this is probably due to a
1639 * UART bug of some kind. So, we clamp the timeout parameter at
1640 * 2*info->timeout.
1641 */
1642 if (!timeout || timeout > 2 * info->timeout)
1643 timeout = 2 * info->timeout;
1644
1645 card = info->card;
1646 if (!cy_is_Z(card)) {
1647 while (cyy_readb(info, CySRER) & CyTxRdy) {
1648 if (msleep_interruptible(jiffies_to_msecs(char_time)))
1649 break;
1650 if (timeout && time_after(jiffies, orig_jiffies +
1651 timeout))
1652 break;
1653 }
1654 }
1655 /* Run one more char cycle */
1656 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1657 }
1658
cy_flush_buffer(struct tty_struct * tty)1659 static void cy_flush_buffer(struct tty_struct *tty)
1660 {
1661 struct cyclades_port *info = tty->driver_data;
1662 struct cyclades_card *card;
1663 int channel, retval;
1664 unsigned long flags;
1665
1666 #ifdef CY_DEBUG_IO
1667 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
1668 #endif
1669
1670 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
1671 return;
1672
1673 card = info->card;
1674 channel = info->line - card->first_line;
1675
1676 spin_lock_irqsave(&card->card_lock, flags);
1677 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1678 spin_unlock_irqrestore(&card->card_lock, flags);
1679
1680 if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
1681 buffers as well */
1682 spin_lock_irqsave(&card->card_lock, flags);
1683 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
1684 if (retval != 0) {
1685 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
1686 "was %x\n", info->line, retval);
1687 }
1688 spin_unlock_irqrestore(&card->card_lock, flags);
1689 }
1690 tty_wakeup(tty);
1691 } /* cy_flush_buffer */
1692
1693
cy_do_close(struct tty_port * port)1694 static void cy_do_close(struct tty_port *port)
1695 {
1696 struct cyclades_port *info = container_of(port, struct cyclades_port,
1697 port);
1698 struct cyclades_card *card;
1699 unsigned long flags;
1700 int channel;
1701
1702 card = info->card;
1703 channel = info->line - card->first_line;
1704 spin_lock_irqsave(&card->card_lock, flags);
1705
1706 if (!cy_is_Z(card)) {
1707 /* Stop accepting input */
1708 cyy_writeb(info, CyCAR, channel & 0x03);
1709 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyRxData);
1710 if (tty_port_initialized(&info->port)) {
1711 /* Waiting for on-board buffers to be empty before
1712 closing the port */
1713 spin_unlock_irqrestore(&card->card_lock, flags);
1714 cy_wait_until_sent(port->tty, info->timeout);
1715 spin_lock_irqsave(&card->card_lock, flags);
1716 }
1717 } else {
1718 #ifdef Z_WAKE
1719 /* Waiting for on-board buffers to be empty before closing
1720 the port */
1721 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
1722 int retval;
1723
1724 if (readl(&ch_ctrl->flow_status) != C_FS_TXIDLE) {
1725 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
1726 if (retval != 0) {
1727 printk(KERN_DEBUG "cyc:cy_close retval on "
1728 "ttyC%d was %x\n", info->line, retval);
1729 }
1730 spin_unlock_irqrestore(&card->card_lock, flags);
1731 wait_for_completion_interruptible(&info->shutdown_wait);
1732 spin_lock_irqsave(&card->card_lock, flags);
1733 }
1734 #endif
1735 }
1736 spin_unlock_irqrestore(&card->card_lock, flags);
1737 cy_shutdown(info, port->tty);
1738 }
1739
1740 /*
1741 * This routine is called when a particular tty device is closed.
1742 */
cy_close(struct tty_struct * tty,struct file * filp)1743 static void cy_close(struct tty_struct *tty, struct file *filp)
1744 {
1745 struct cyclades_port *info = tty->driver_data;
1746 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
1747 return;
1748 tty_port_close(&info->port, tty, filp);
1749 } /* cy_close */
1750
1751 /* This routine gets called when tty_write has put something into
1752 * the write_queue. The characters may come from user space or
1753 * kernel space.
1754 *
1755 * This routine will return the number of characters actually
1756 * accepted for writing.
1757 *
1758 * If the port is not already transmitting stuff, start it off by
1759 * enabling interrupts. The interrupt service routine will then
1760 * ensure that the characters are sent.
1761 * If the port is already active, there is no need to kick it.
1762 *
1763 */
cy_write(struct tty_struct * tty,const unsigned char * buf,int count)1764 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1765 {
1766 struct cyclades_port *info = tty->driver_data;
1767 unsigned long flags;
1768 int c, ret = 0;
1769
1770 #ifdef CY_DEBUG_IO
1771 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
1772 #endif
1773
1774 if (serial_paranoia_check(info, tty->name, "cy_write"))
1775 return 0;
1776
1777 if (!info->port.xmit_buf)
1778 return 0;
1779
1780 spin_lock_irqsave(&info->card->card_lock, flags);
1781 while (1) {
1782 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
1783 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
1784
1785 if (c <= 0)
1786 break;
1787
1788 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1789 info->xmit_head = (info->xmit_head + c) &
1790 (SERIAL_XMIT_SIZE - 1);
1791 info->xmit_cnt += c;
1792 buf += c;
1793 count -= c;
1794 ret += c;
1795 }
1796 spin_unlock_irqrestore(&info->card->card_lock, flags);
1797
1798 info->idle_stats.xmit_bytes += ret;
1799 info->idle_stats.xmit_idle = jiffies;
1800
1801 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1802 start_xmit(info);
1803
1804 return ret;
1805 } /* cy_write */
1806
1807 /*
1808 * This routine is called by the kernel to write a single
1809 * character to the tty device. If the kernel uses this routine,
1810 * it must call the flush_chars() routine (if defined) when it is
1811 * done stuffing characters into the driver. If there is no room
1812 * in the queue, the character is ignored.
1813 */
cy_put_char(struct tty_struct * tty,unsigned char ch)1814 static int cy_put_char(struct tty_struct *tty, unsigned char ch)
1815 {
1816 struct cyclades_port *info = tty->driver_data;
1817 unsigned long flags;
1818
1819 #ifdef CY_DEBUG_IO
1820 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
1821 #endif
1822
1823 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
1824 return 0;
1825
1826 if (!info->port.xmit_buf)
1827 return 0;
1828
1829 spin_lock_irqsave(&info->card->card_lock, flags);
1830 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
1831 spin_unlock_irqrestore(&info->card->card_lock, flags);
1832 return 0;
1833 }
1834
1835 info->port.xmit_buf[info->xmit_head++] = ch;
1836 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1837 info->xmit_cnt++;
1838 info->idle_stats.xmit_bytes++;
1839 info->idle_stats.xmit_idle = jiffies;
1840 spin_unlock_irqrestore(&info->card->card_lock, flags);
1841 return 1;
1842 } /* cy_put_char */
1843
1844 /*
1845 * This routine is called by the kernel after it has written a
1846 * series of characters to the tty device using put_char().
1847 */
cy_flush_chars(struct tty_struct * tty)1848 static void cy_flush_chars(struct tty_struct *tty)
1849 {
1850 struct cyclades_port *info = tty->driver_data;
1851
1852 #ifdef CY_DEBUG_IO
1853 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
1854 #endif
1855
1856 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
1857 return;
1858
1859 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1860 !info->port.xmit_buf)
1861 return;
1862
1863 start_xmit(info);
1864 } /* cy_flush_chars */
1865
1866 /*
1867 * This routine returns the numbers of characters the tty driver
1868 * will accept for queuing to be written. This number is subject
1869 * to change as output buffers get emptied, or if the output flow
1870 * control is activated.
1871 */
cy_write_room(struct tty_struct * tty)1872 static int cy_write_room(struct tty_struct *tty)
1873 {
1874 struct cyclades_port *info = tty->driver_data;
1875 int ret;
1876
1877 #ifdef CY_DEBUG_IO
1878 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
1879 #endif
1880
1881 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
1882 return 0;
1883 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1884 if (ret < 0)
1885 ret = 0;
1886 return ret;
1887 } /* cy_write_room */
1888
cy_chars_in_buffer(struct tty_struct * tty)1889 static int cy_chars_in_buffer(struct tty_struct *tty)
1890 {
1891 struct cyclades_port *info = tty->driver_data;
1892
1893 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
1894 return 0;
1895
1896 #ifdef Z_EXT_CHARS_IN_BUFFER
1897 if (!cy_is_Z(info->card)) {
1898 #endif /* Z_EXT_CHARS_IN_BUFFER */
1899 #ifdef CY_DEBUG_IO
1900 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
1901 info->line, info->xmit_cnt);
1902 #endif
1903 return info->xmit_cnt;
1904 #ifdef Z_EXT_CHARS_IN_BUFFER
1905 } else {
1906 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
1907 int char_count;
1908 __u32 tx_put, tx_get, tx_bufsize;
1909
1910 tx_get = readl(&buf_ctrl->tx_get);
1911 tx_put = readl(&buf_ctrl->tx_put);
1912 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1913 if (tx_put >= tx_get)
1914 char_count = tx_put - tx_get;
1915 else
1916 char_count = tx_put - tx_get + tx_bufsize;
1917 #ifdef CY_DEBUG_IO
1918 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
1919 info->line, info->xmit_cnt + char_count);
1920 #endif
1921 return info->xmit_cnt + char_count;
1922 }
1923 #endif /* Z_EXT_CHARS_IN_BUFFER */
1924 } /* cy_chars_in_buffer */
1925
1926 /*
1927 * ------------------------------------------------------------
1928 * cy_ioctl() and friends
1929 * ------------------------------------------------------------
1930 */
1931
cyy_baud_calc(struct cyclades_port * info,__u32 baud)1932 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1933 {
1934 int co, co_val, bpr;
1935 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
1936 25000000);
1937
1938 if (baud == 0) {
1939 info->tbpr = info->tco = info->rbpr = info->rco = 0;
1940 return;
1941 }
1942
1943 /* determine which prescaler to use */
1944 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
1945 if (cy_clock / co_val / baud > 63)
1946 break;
1947 }
1948
1949 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
1950 if (bpr > 255)
1951 bpr = 255;
1952
1953 info->tbpr = info->rbpr = bpr;
1954 info->tco = info->rco = co;
1955 }
1956
1957 /*
1958 * This routine finds or computes the various line characteristics.
1959 * It used to be called config_setup
1960 */
cy_set_line_char(struct cyclades_port * info,struct tty_struct * tty)1961 static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
1962 {
1963 struct cyclades_card *card;
1964 unsigned long flags;
1965 int channel;
1966 unsigned cflag, iflag;
1967 int baud, baud_rate = 0;
1968 int i;
1969
1970 if (info->line == -1)
1971 return;
1972
1973 cflag = tty->termios.c_cflag;
1974 iflag = tty->termios.c_iflag;
1975
1976 card = info->card;
1977 channel = info->line - card->first_line;
1978
1979 if (!cy_is_Z(card)) {
1980 u32 cflags;
1981
1982 /* baud rate */
1983 baud = tty_get_baud_rate(tty);
1984 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
1985 ASYNC_SPD_CUST) {
1986 if (info->custom_divisor)
1987 baud_rate = info->baud / info->custom_divisor;
1988 else
1989 baud_rate = info->baud;
1990 } else if (baud > CD1400_MAX_SPEED) {
1991 baud = CD1400_MAX_SPEED;
1992 }
1993 /* find the baud index */
1994 for (i = 0; i < 20; i++) {
1995 if (baud == baud_table[i])
1996 break;
1997 }
1998 if (i == 20)
1999 i = 19; /* CD1400_MAX_SPEED */
2000
2001 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2002 ASYNC_SPD_CUST) {
2003 cyy_baud_calc(info, baud_rate);
2004 } else {
2005 if (info->chip_rev >= CD1400_REV_J) {
2006 /* It is a CD1400 rev. J or later */
2007 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
2008 info->tco = baud_co_60[i]; /* Tx CO */
2009 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
2010 info->rco = baud_co_60[i]; /* Rx CO */
2011 } else {
2012 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
2013 info->tco = baud_co_25[i]; /* Tx CO */
2014 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
2015 info->rco = baud_co_25[i]; /* Rx CO */
2016 }
2017 }
2018 if (baud_table[i] == 134) {
2019 /* get it right for 134.5 baud */
2020 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
2021 2;
2022 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2023 ASYNC_SPD_CUST) {
2024 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2025 baud_rate) + 2;
2026 } else if (baud_table[i]) {
2027 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2028 baud_table[i]) + 2;
2029 /* this needs to be propagated into the card info */
2030 } else {
2031 info->timeout = 0;
2032 }
2033 /* By tradition (is it a standard?) a baud rate of zero
2034 implies the line should be/has been closed. A bit
2035 later in this routine such a test is performed. */
2036
2037 /* byte size and parity */
2038 info->cor5 = 0;
2039 info->cor4 = 0;
2040 /* receive threshold */
2041 info->cor3 = (info->default_threshold ?
2042 info->default_threshold : baud_cor3[i]);
2043 info->cor2 = CyETC;
2044 switch (cflag & CSIZE) {
2045 case CS5:
2046 info->cor1 = Cy_5_BITS;
2047 break;
2048 case CS6:
2049 info->cor1 = Cy_6_BITS;
2050 break;
2051 case CS7:
2052 info->cor1 = Cy_7_BITS;
2053 break;
2054 case CS8:
2055 info->cor1 = Cy_8_BITS;
2056 break;
2057 }
2058 if (cflag & CSTOPB)
2059 info->cor1 |= Cy_2_STOP;
2060
2061 if (cflag & PARENB) {
2062 if (cflag & PARODD)
2063 info->cor1 |= CyPARITY_O;
2064 else
2065 info->cor1 |= CyPARITY_E;
2066 } else
2067 info->cor1 |= CyPARITY_NONE;
2068
2069 /* CTS flow control flag */
2070 tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
2071 if (cflag & CRTSCTS)
2072 info->cor2 |= CyCtsAE;
2073 else
2074 info->cor2 &= ~CyCtsAE;
2075 tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
2076
2077 /***********************************************
2078 The hardware option, CyRtsAO, presents RTS when
2079 the chip has characters to send. Since most modems
2080 use RTS as reverse (inbound) flow control, this
2081 option is not used. If inbound flow control is
2082 necessary, DTR can be programmed to provide the
2083 appropriate signals for use with a non-standard
2084 cable. Contact Marcio Saito for details.
2085 ***********************************************/
2086
2087 channel &= 0x03;
2088
2089 spin_lock_irqsave(&card->card_lock, flags);
2090 cyy_writeb(info, CyCAR, channel);
2091
2092 /* tx and rx baud rate */
2093
2094 cyy_writeb(info, CyTCOR, info->tco);
2095 cyy_writeb(info, CyTBPR, info->tbpr);
2096 cyy_writeb(info, CyRCOR, info->rco);
2097 cyy_writeb(info, CyRBPR, info->rbpr);
2098
2099 /* set line characteristics according configuration */
2100
2101 cyy_writeb(info, CySCHR1, START_CHAR(tty));
2102 cyy_writeb(info, CySCHR2, STOP_CHAR(tty));
2103 cyy_writeb(info, CyCOR1, info->cor1);
2104 cyy_writeb(info, CyCOR2, info->cor2);
2105 cyy_writeb(info, CyCOR3, info->cor3);
2106 cyy_writeb(info, CyCOR4, info->cor4);
2107 cyy_writeb(info, CyCOR5, info->cor5);
2108
2109 cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
2110 CyCOR3ch);
2111
2112 /* !!! Is this needed? */
2113 cyy_writeb(info, CyCAR, channel);
2114 cyy_writeb(info, CyRTPR,
2115 (info->default_timeout ? info->default_timeout : 0x02));
2116 /* 10ms rx timeout */
2117
2118 cflags = CyCTS;
2119 if (!C_CLOCAL(tty))
2120 cflags |= CyDSR | CyRI | CyDCD;
2121 /* without modem intr */
2122 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyMdmCh);
2123 /* act on 1->0 modem transitions */
2124 if ((cflag & CRTSCTS) && info->rflow)
2125 cyy_writeb(info, CyMCOR1, cflags | rflow_thr[i]);
2126 else
2127 cyy_writeb(info, CyMCOR1, cflags);
2128 /* act on 0->1 modem transitions */
2129 cyy_writeb(info, CyMCOR2, cflags);
2130
2131 if (i == 0) /* baud rate is zero, turn off line */
2132 cyy_change_rts_dtr(info, 0, TIOCM_DTR);
2133 else
2134 cyy_change_rts_dtr(info, TIOCM_DTR, 0);
2135
2136 clear_bit(TTY_IO_ERROR, &tty->flags);
2137 spin_unlock_irqrestore(&card->card_lock, flags);
2138
2139 } else {
2140 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
2141 __u32 sw_flow;
2142 int retval;
2143
2144 if (!cyz_is_loaded(card))
2145 return;
2146
2147 /* baud rate */
2148 baud = tty_get_baud_rate(tty);
2149 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2150 ASYNC_SPD_CUST) {
2151 if (info->custom_divisor)
2152 baud_rate = info->baud / info->custom_divisor;
2153 else
2154 baud_rate = info->baud;
2155 } else if (baud > CYZ_MAX_SPEED) {
2156 baud = CYZ_MAX_SPEED;
2157 }
2158 cy_writel(&ch_ctrl->comm_baud, baud);
2159
2160 if (baud == 134) {
2161 /* get it right for 134.5 baud */
2162 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
2163 2;
2164 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2165 ASYNC_SPD_CUST) {
2166 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2167 baud_rate) + 2;
2168 } else if (baud) {
2169 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2170 baud) + 2;
2171 /* this needs to be propagated into the card info */
2172 } else {
2173 info->timeout = 0;
2174 }
2175
2176 /* byte size and parity */
2177 switch (cflag & CSIZE) {
2178 case CS5:
2179 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
2180 break;
2181 case CS6:
2182 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
2183 break;
2184 case CS7:
2185 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
2186 break;
2187 case CS8:
2188 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
2189 break;
2190 }
2191 if (cflag & CSTOPB) {
2192 cy_writel(&ch_ctrl->comm_data_l,
2193 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
2194 } else {
2195 cy_writel(&ch_ctrl->comm_data_l,
2196 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
2197 }
2198 if (cflag & PARENB) {
2199 if (cflag & PARODD)
2200 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
2201 else
2202 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
2203 } else
2204 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
2205
2206 /* CTS flow control flag */
2207 if (cflag & CRTSCTS) {
2208 cy_writel(&ch_ctrl->hw_flow,
2209 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
2210 } else {
2211 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
2212 ~(C_RS_CTS | C_RS_RTS));
2213 }
2214 /* As the HW flow control is done in firmware, the driver
2215 doesn't need to care about it */
2216 tty_port_set_cts_flow(&info->port, 0);
2217
2218 /* XON/XOFF/XANY flow control flags */
2219 sw_flow = 0;
2220 if (iflag & IXON) {
2221 sw_flow |= C_FL_OXX;
2222 if (iflag & IXANY)
2223 sw_flow |= C_FL_OIXANY;
2224 }
2225 cy_writel(&ch_ctrl->sw_flow, sw_flow);
2226
2227 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2228 if (retval != 0) {
2229 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
2230 "was %x\n", info->line, retval);
2231 }
2232
2233 /* CD sensitivity */
2234 tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
2235
2236 if (baud == 0) { /* baud rate is zero, turn off line */
2237 cy_writel(&ch_ctrl->rs_control,
2238 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
2239 #ifdef CY_DEBUG_DTR
2240 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
2241 #endif
2242 } else {
2243 cy_writel(&ch_ctrl->rs_control,
2244 readl(&ch_ctrl->rs_control) | C_RS_DTR);
2245 #ifdef CY_DEBUG_DTR
2246 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
2247 #endif
2248 }
2249
2250 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2251 if (retval != 0) {
2252 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
2253 "was %x\n", info->line, retval);
2254 }
2255
2256 clear_bit(TTY_IO_ERROR, &tty->flags);
2257 }
2258 } /* set_line_char */
2259
cy_get_serial_info(struct cyclades_port * info,struct serial_struct __user * retinfo)2260 static int cy_get_serial_info(struct cyclades_port *info,
2261 struct serial_struct __user *retinfo)
2262 {
2263 struct cyclades_card *cinfo = info->card;
2264 struct serial_struct tmp = {
2265 .type = info->type,
2266 .line = info->line,
2267 .port = (info->card - cy_card) * 0x100 + info->line -
2268 cinfo->first_line,
2269 .irq = cinfo->irq,
2270 .flags = info->port.flags,
2271 .close_delay = info->port.close_delay,
2272 .closing_wait = info->port.closing_wait,
2273 .baud_base = info->baud,
2274 .custom_divisor = info->custom_divisor,
2275 };
2276 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
2277 }
2278
2279 static int
cy_set_serial_info(struct cyclades_port * info,struct tty_struct * tty,struct serial_struct __user * new_info)2280 cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
2281 struct serial_struct __user *new_info)
2282 {
2283 struct serial_struct new_serial;
2284 int old_flags;
2285 int ret;
2286
2287 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2288 return -EFAULT;
2289
2290 mutex_lock(&info->port.mutex);
2291
2292 old_flags = info->port.flags;
2293
2294 if (!capable(CAP_SYS_ADMIN)) {
2295 if (new_serial.close_delay != info->port.close_delay ||
2296 new_serial.baud_base != info->baud ||
2297 (new_serial.flags & ASYNC_FLAGS &
2298 ~ASYNC_USR_MASK) !=
2299 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
2300 {
2301 mutex_unlock(&info->port.mutex);
2302 return -EPERM;
2303 }
2304 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
2305 (new_serial.flags & ASYNC_USR_MASK);
2306 info->baud = new_serial.baud_base;
2307 info->custom_divisor = new_serial.custom_divisor;
2308 goto check_and_exit;
2309 }
2310
2311 /*
2312 * OK, past this point, all the error checking has been done.
2313 * At this point, we start making changes.....
2314 */
2315
2316 info->baud = new_serial.baud_base;
2317 info->custom_divisor = new_serial.custom_divisor;
2318 info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
2319 (new_serial.flags & ASYNC_FLAGS);
2320 info->port.close_delay = new_serial.close_delay * HZ / 100;
2321 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
2322
2323 check_and_exit:
2324 if (tty_port_initialized(&info->port)) {
2325 if ((new_serial.flags ^ old_flags) & ASYNC_SPD_MASK) {
2326 /* warn about deprecation unless clearing */
2327 if (new_serial.flags & ASYNC_SPD_MASK)
2328 dev_warn_ratelimited(tty->dev, "use of SPD flags is deprecated\n");
2329 }
2330 cy_set_line_char(info, tty);
2331 ret = 0;
2332 } else {
2333 ret = cy_startup(info, tty);
2334 }
2335 mutex_unlock(&info->port.mutex);
2336 return ret;
2337 } /* set_serial_info */
2338
2339 /*
2340 * get_lsr_info - get line status register info
2341 *
2342 * Purpose: Let user call ioctl() to get info when the UART physically
2343 * is emptied. On bus types like RS485, the transmitter must
2344 * release the bus after transmitting. This must be done when
2345 * the transmit shift register is empty, not be done when the
2346 * transmit holding register is empty. This functionality
2347 * allows an RS485 driver to be written in user space.
2348 */
get_lsr_info(struct cyclades_port * info,unsigned int __user * value)2349 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
2350 {
2351 struct cyclades_card *card = info->card;
2352 unsigned int result;
2353 unsigned long flags;
2354 u8 status;
2355
2356 if (!cy_is_Z(card)) {
2357 spin_lock_irqsave(&card->card_lock, flags);
2358 status = cyy_readb(info, CySRER) & (CyTxRdy | CyTxMpty);
2359 spin_unlock_irqrestore(&card->card_lock, flags);
2360 result = (status ? 0 : TIOCSER_TEMT);
2361 } else {
2362 /* Not supported yet */
2363 return -EINVAL;
2364 }
2365 return put_user(result, value);
2366 }
2367
cy_tiocmget(struct tty_struct * tty)2368 static int cy_tiocmget(struct tty_struct *tty)
2369 {
2370 struct cyclades_port *info = tty->driver_data;
2371 struct cyclades_card *card;
2372 int result;
2373
2374 if (serial_paranoia_check(info, tty->name, __func__))
2375 return -ENODEV;
2376
2377 card = info->card;
2378
2379 if (!cy_is_Z(card)) {
2380 unsigned long flags;
2381 int channel = info->line - card->first_line;
2382 u8 status;
2383
2384 spin_lock_irqsave(&card->card_lock, flags);
2385 cyy_writeb(info, CyCAR, channel & 0x03);
2386 status = cyy_readb(info, CyMSVR1);
2387 status |= cyy_readb(info, CyMSVR2);
2388 spin_unlock_irqrestore(&card->card_lock, flags);
2389
2390 if (info->rtsdtr_inv) {
2391 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
2392 ((status & CyDTR) ? TIOCM_RTS : 0);
2393 } else {
2394 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
2395 ((status & CyDTR) ? TIOCM_DTR : 0);
2396 }
2397 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
2398 ((status & CyRI) ? TIOCM_RNG : 0) |
2399 ((status & CyDSR) ? TIOCM_DSR : 0) |
2400 ((status & CyCTS) ? TIOCM_CTS : 0);
2401 } else {
2402 u32 lstatus;
2403
2404 if (!cyz_is_loaded(card)) {
2405 result = -ENODEV;
2406 goto end;
2407 }
2408
2409 lstatus = readl(&info->u.cyz.ch_ctrl->rs_status);
2410 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
2411 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
2412 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
2413 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
2414 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
2415 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
2416 }
2417 end:
2418 return result;
2419 } /* cy_tiomget */
2420
2421 static int
cy_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)2422 cy_tiocmset(struct tty_struct *tty,
2423 unsigned int set, unsigned int clear)
2424 {
2425 struct cyclades_port *info = tty->driver_data;
2426 struct cyclades_card *card;
2427 unsigned long flags;
2428
2429 if (serial_paranoia_check(info, tty->name, __func__))
2430 return -ENODEV;
2431
2432 card = info->card;
2433 if (!cy_is_Z(card)) {
2434 spin_lock_irqsave(&card->card_lock, flags);
2435 cyy_change_rts_dtr(info, set, clear);
2436 spin_unlock_irqrestore(&card->card_lock, flags);
2437 } else {
2438 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
2439 int retval, channel = info->line - card->first_line;
2440 u32 rs;
2441
2442 if (!cyz_is_loaded(card))
2443 return -ENODEV;
2444
2445 spin_lock_irqsave(&card->card_lock, flags);
2446 rs = readl(&ch_ctrl->rs_control);
2447 if (set & TIOCM_RTS)
2448 rs |= C_RS_RTS;
2449 if (clear & TIOCM_RTS)
2450 rs &= ~C_RS_RTS;
2451 if (set & TIOCM_DTR) {
2452 rs |= C_RS_DTR;
2453 #ifdef CY_DEBUG_DTR
2454 printk(KERN_DEBUG "cyc:set_modem_info raising Z DTR\n");
2455 #endif
2456 }
2457 if (clear & TIOCM_DTR) {
2458 rs &= ~C_RS_DTR;
2459 #ifdef CY_DEBUG_DTR
2460 printk(KERN_DEBUG "cyc:set_modem_info clearing "
2461 "Z DTR\n");
2462 #endif
2463 }
2464 cy_writel(&ch_ctrl->rs_control, rs);
2465 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2466 spin_unlock_irqrestore(&card->card_lock, flags);
2467 if (retval != 0) {
2468 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
2469 "was %x\n", info->line, retval);
2470 }
2471 }
2472 return 0;
2473 }
2474
2475 /*
2476 * cy_break() --- routine which turns the break handling on or off
2477 */
cy_break(struct tty_struct * tty,int break_state)2478 static int cy_break(struct tty_struct *tty, int break_state)
2479 {
2480 struct cyclades_port *info = tty->driver_data;
2481 struct cyclades_card *card;
2482 unsigned long flags;
2483 int retval = 0;
2484
2485 if (serial_paranoia_check(info, tty->name, "cy_break"))
2486 return -EINVAL;
2487
2488 card = info->card;
2489
2490 spin_lock_irqsave(&card->card_lock, flags);
2491 if (!cy_is_Z(card)) {
2492 /* Let the transmit ISR take care of this (since it
2493 requires stuffing characters into the output stream).
2494 */
2495 if (break_state == -1) {
2496 if (!info->breakon) {
2497 info->breakon = 1;
2498 if (!info->xmit_cnt) {
2499 spin_unlock_irqrestore(&card->card_lock, flags);
2500 start_xmit(info);
2501 spin_lock_irqsave(&card->card_lock, flags);
2502 }
2503 }
2504 } else {
2505 if (!info->breakoff) {
2506 info->breakoff = 1;
2507 if (!info->xmit_cnt) {
2508 spin_unlock_irqrestore(&card->card_lock, flags);
2509 start_xmit(info);
2510 spin_lock_irqsave(&card->card_lock, flags);
2511 }
2512 }
2513 }
2514 } else {
2515 if (break_state == -1) {
2516 retval = cyz_issue_cmd(card,
2517 info->line - card->first_line,
2518 C_CM_SET_BREAK, 0L);
2519 if (retval != 0) {
2520 printk(KERN_ERR "cyc:cy_break (set) retval on "
2521 "ttyC%d was %x\n", info->line, retval);
2522 }
2523 } else {
2524 retval = cyz_issue_cmd(card,
2525 info->line - card->first_line,
2526 C_CM_CLR_BREAK, 0L);
2527 if (retval != 0) {
2528 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
2529 "on ttyC%d was %x\n", info->line,
2530 retval);
2531 }
2532 }
2533 }
2534 spin_unlock_irqrestore(&card->card_lock, flags);
2535 return retval;
2536 } /* cy_break */
2537
set_threshold(struct cyclades_port * info,unsigned long value)2538 static int set_threshold(struct cyclades_port *info, unsigned long value)
2539 {
2540 struct cyclades_card *card = info->card;
2541 unsigned long flags;
2542
2543 if (!cy_is_Z(card)) {
2544 info->cor3 &= ~CyREC_FIFO;
2545 info->cor3 |= value & CyREC_FIFO;
2546
2547 spin_lock_irqsave(&card->card_lock, flags);
2548 cyy_writeb(info, CyCOR3, info->cor3);
2549 cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR3ch);
2550 spin_unlock_irqrestore(&card->card_lock, flags);
2551 }
2552 return 0;
2553 } /* set_threshold */
2554
get_threshold(struct cyclades_port * info,unsigned long __user * value)2555 static int get_threshold(struct cyclades_port *info,
2556 unsigned long __user *value)
2557 {
2558 struct cyclades_card *card = info->card;
2559
2560 if (!cy_is_Z(card)) {
2561 u8 tmp = cyy_readb(info, CyCOR3) & CyREC_FIFO;
2562 return put_user(tmp, value);
2563 }
2564 return 0;
2565 } /* get_threshold */
2566
set_timeout(struct cyclades_port * info,unsigned long value)2567 static int set_timeout(struct cyclades_port *info, unsigned long value)
2568 {
2569 struct cyclades_card *card = info->card;
2570 unsigned long flags;
2571
2572 if (!cy_is_Z(card)) {
2573 spin_lock_irqsave(&card->card_lock, flags);
2574 cyy_writeb(info, CyRTPR, value & 0xff);
2575 spin_unlock_irqrestore(&card->card_lock, flags);
2576 }
2577 return 0;
2578 } /* set_timeout */
2579
get_timeout(struct cyclades_port * info,unsigned long __user * value)2580 static int get_timeout(struct cyclades_port *info,
2581 unsigned long __user *value)
2582 {
2583 struct cyclades_card *card = info->card;
2584
2585 if (!cy_is_Z(card)) {
2586 u8 tmp = cyy_readb(info, CyRTPR);
2587 return put_user(tmp, value);
2588 }
2589 return 0;
2590 } /* get_timeout */
2591
cy_cflags_changed(struct cyclades_port * info,unsigned long arg,struct cyclades_icount * cprev)2592 static int cy_cflags_changed(struct cyclades_port *info, unsigned long arg,
2593 struct cyclades_icount *cprev)
2594 {
2595 struct cyclades_icount cnow;
2596 unsigned long flags;
2597 int ret;
2598
2599 spin_lock_irqsave(&info->card->card_lock, flags);
2600 cnow = info->icount; /* atomic copy */
2601 spin_unlock_irqrestore(&info->card->card_lock, flags);
2602
2603 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
2604 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
2605 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
2606 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
2607
2608 *cprev = cnow;
2609
2610 return ret;
2611 }
2612
2613 /*
2614 * This routine allows the tty driver to implement device-
2615 * specific ioctl's. If the ioctl number passed in cmd is
2616 * not recognized by the driver, it should return ENOIOCTLCMD.
2617 */
2618 static int
cy_ioctl(struct tty_struct * tty,unsigned int cmd,unsigned long arg)2619 cy_ioctl(struct tty_struct *tty,
2620 unsigned int cmd, unsigned long arg)
2621 {
2622 struct cyclades_port *info = tty->driver_data;
2623 struct cyclades_icount cnow; /* kernel counter temps */
2624 int ret_val = 0;
2625 unsigned long flags;
2626 void __user *argp = (void __user *)arg;
2627
2628 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
2629 return -ENODEV;
2630
2631 #ifdef CY_DEBUG_OTHER
2632 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
2633 info->line, cmd, arg);
2634 #endif
2635
2636 switch (cmd) {
2637 case CYGETMON:
2638 if (copy_to_user(argp, &info->mon, sizeof(info->mon))) {
2639 ret_val = -EFAULT;
2640 break;
2641 }
2642 memset(&info->mon, 0, sizeof(info->mon));
2643 break;
2644 case CYGETTHRESH:
2645 ret_val = get_threshold(info, argp);
2646 break;
2647 case CYSETTHRESH:
2648 ret_val = set_threshold(info, arg);
2649 break;
2650 case CYGETDEFTHRESH:
2651 ret_val = put_user(info->default_threshold,
2652 (unsigned long __user *)argp);
2653 break;
2654 case CYSETDEFTHRESH:
2655 info->default_threshold = arg & 0x0f;
2656 break;
2657 case CYGETTIMEOUT:
2658 ret_val = get_timeout(info, argp);
2659 break;
2660 case CYSETTIMEOUT:
2661 ret_val = set_timeout(info, arg);
2662 break;
2663 case CYGETDEFTIMEOUT:
2664 ret_val = put_user(info->default_timeout,
2665 (unsigned long __user *)argp);
2666 break;
2667 case CYSETDEFTIMEOUT:
2668 info->default_timeout = arg & 0xff;
2669 break;
2670 case CYSETRFLOW:
2671 info->rflow = (int)arg;
2672 break;
2673 case CYGETRFLOW:
2674 ret_val = info->rflow;
2675 break;
2676 case CYSETRTSDTR_INV:
2677 info->rtsdtr_inv = (int)arg;
2678 break;
2679 case CYGETRTSDTR_INV:
2680 ret_val = info->rtsdtr_inv;
2681 break;
2682 case CYGETCD1400VER:
2683 ret_val = info->chip_rev;
2684 break;
2685 #ifndef CONFIG_CYZ_INTR
2686 case CYZSETPOLLCYCLE:
2687 if (arg > LONG_MAX / HZ)
2688 return -ENODEV;
2689 cyz_polling_cycle = (arg * HZ) / 1000;
2690 break;
2691 case CYZGETPOLLCYCLE:
2692 ret_val = (cyz_polling_cycle * 1000) / HZ;
2693 break;
2694 #endif /* CONFIG_CYZ_INTR */
2695 case CYSETWAIT:
2696 info->port.closing_wait = (unsigned short)arg * HZ / 100;
2697 break;
2698 case CYGETWAIT:
2699 ret_val = info->port.closing_wait / (HZ / 100);
2700 break;
2701 case TIOCGSERIAL:
2702 ret_val = cy_get_serial_info(info, argp);
2703 break;
2704 case TIOCSSERIAL:
2705 ret_val = cy_set_serial_info(info, tty, argp);
2706 break;
2707 case TIOCSERGETLSR: /* Get line status register */
2708 ret_val = get_lsr_info(info, argp);
2709 break;
2710 /*
2711 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
2712 * - mask passed in arg for lines of interest
2713 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
2714 * Caller should use TIOCGICOUNT to see which one it was
2715 */
2716 case TIOCMIWAIT:
2717 spin_lock_irqsave(&info->card->card_lock, flags);
2718 /* note the counters on entry */
2719 cnow = info->icount;
2720 spin_unlock_irqrestore(&info->card->card_lock, flags);
2721 ret_val = wait_event_interruptible(info->port.delta_msr_wait,
2722 cy_cflags_changed(info, arg, &cnow));
2723 break;
2724
2725 /*
2726 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
2727 * Return: write counters to the user passed counter struct
2728 * NB: both 1->0 and 0->1 transitions are counted except for
2729 * RI where only 0->1 is counted.
2730 */
2731 default:
2732 ret_val = -ENOIOCTLCMD;
2733 }
2734
2735 #ifdef CY_DEBUG_OTHER
2736 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
2737 #endif
2738 return ret_val;
2739 } /* cy_ioctl */
2740
cy_get_icount(struct tty_struct * tty,struct serial_icounter_struct * sic)2741 static int cy_get_icount(struct tty_struct *tty,
2742 struct serial_icounter_struct *sic)
2743 {
2744 struct cyclades_port *info = tty->driver_data;
2745 struct cyclades_icount cnow; /* Used to snapshot */
2746 unsigned long flags;
2747
2748 spin_lock_irqsave(&info->card->card_lock, flags);
2749 cnow = info->icount;
2750 spin_unlock_irqrestore(&info->card->card_lock, flags);
2751
2752 sic->cts = cnow.cts;
2753 sic->dsr = cnow.dsr;
2754 sic->rng = cnow.rng;
2755 sic->dcd = cnow.dcd;
2756 sic->rx = cnow.rx;
2757 sic->tx = cnow.tx;
2758 sic->frame = cnow.frame;
2759 sic->overrun = cnow.overrun;
2760 sic->parity = cnow.parity;
2761 sic->brk = cnow.brk;
2762 sic->buf_overrun = cnow.buf_overrun;
2763 return 0;
2764 }
2765
2766 /*
2767 * This routine allows the tty driver to be notified when
2768 * device's termios settings have changed. Note that a
2769 * well-designed tty driver should be prepared to accept the case
2770 * where old == NULL, and try to do something rational.
2771 */
cy_set_termios(struct tty_struct * tty,struct ktermios * old_termios)2772 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
2773 {
2774 struct cyclades_port *info = tty->driver_data;
2775
2776 #ifdef CY_DEBUG_OTHER
2777 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
2778 #endif
2779
2780 cy_set_line_char(info, tty);
2781
2782 if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
2783 tty->hw_stopped = 0;
2784 cy_start(tty);
2785 }
2786 #if 0
2787 /*
2788 * No need to wake up processes in open wait, since they
2789 * sample the CLOCAL flag once, and don't recheck it.
2790 * XXX It's not clear whether the current behavior is correct
2791 * or not. Hence, this may change.....
2792 */
2793 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
2794 wake_up_interruptible(&info->port.open_wait);
2795 #endif
2796 } /* cy_set_termios */
2797
2798 /* This function is used to send a high-priority XON/XOFF character to
2799 the device.
2800 */
cy_send_xchar(struct tty_struct * tty,char ch)2801 static void cy_send_xchar(struct tty_struct *tty, char ch)
2802 {
2803 struct cyclades_port *info = tty->driver_data;
2804 struct cyclades_card *card;
2805 int channel;
2806
2807 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
2808 return;
2809
2810 info->x_char = ch;
2811
2812 if (ch)
2813 cy_start(tty);
2814
2815 card = info->card;
2816 channel = info->line - card->first_line;
2817
2818 if (cy_is_Z(card)) {
2819 if (ch == STOP_CHAR(tty))
2820 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
2821 else if (ch == START_CHAR(tty))
2822 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
2823 }
2824 }
2825
2826 /* This routine is called by the upper-layer tty layer to signal
2827 that incoming characters should be throttled because the input
2828 buffers are close to full.
2829 */
cy_throttle(struct tty_struct * tty)2830 static void cy_throttle(struct tty_struct *tty)
2831 {
2832 struct cyclades_port *info = tty->driver_data;
2833 struct cyclades_card *card;
2834 unsigned long flags;
2835
2836 #ifdef CY_DEBUG_THROTTLE
2837 printk(KERN_DEBUG "cyc:throttle %s ...ttyC%d\n", tty_name(tty),
2838 info->line);
2839 #endif
2840
2841 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
2842 return;
2843
2844 card = info->card;
2845
2846 if (I_IXOFF(tty)) {
2847 if (!cy_is_Z(card))
2848 cy_send_xchar(tty, STOP_CHAR(tty));
2849 else
2850 info->throttle = 1;
2851 }
2852
2853 if (C_CRTSCTS(tty)) {
2854 if (!cy_is_Z(card)) {
2855 spin_lock_irqsave(&card->card_lock, flags);
2856 cyy_change_rts_dtr(info, 0, TIOCM_RTS);
2857 spin_unlock_irqrestore(&card->card_lock, flags);
2858 } else {
2859 info->throttle = 1;
2860 }
2861 }
2862 } /* cy_throttle */
2863
2864 /*
2865 * This routine notifies the tty driver that it should signal
2866 * that characters can now be sent to the tty without fear of
2867 * overrunning the input buffers of the line disciplines.
2868 */
cy_unthrottle(struct tty_struct * tty)2869 static void cy_unthrottle(struct tty_struct *tty)
2870 {
2871 struct cyclades_port *info = tty->driver_data;
2872 struct cyclades_card *card;
2873 unsigned long flags;
2874
2875 #ifdef CY_DEBUG_THROTTLE
2876 printk(KERN_DEBUG "cyc:unthrottle %s ...ttyC%d\n",
2877 tty_name(tty), info->line);
2878 #endif
2879
2880 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
2881 return;
2882
2883 if (I_IXOFF(tty)) {
2884 if (info->x_char)
2885 info->x_char = 0;
2886 else
2887 cy_send_xchar(tty, START_CHAR(tty));
2888 }
2889
2890 if (C_CRTSCTS(tty)) {
2891 card = info->card;
2892 if (!cy_is_Z(card)) {
2893 spin_lock_irqsave(&card->card_lock, flags);
2894 cyy_change_rts_dtr(info, TIOCM_RTS, 0);
2895 spin_unlock_irqrestore(&card->card_lock, flags);
2896 } else {
2897 info->throttle = 0;
2898 }
2899 }
2900 } /* cy_unthrottle */
2901
2902 /* cy_start and cy_stop provide software output flow control as a
2903 function of XON/XOFF, software CTS, and other such stuff.
2904 */
cy_stop(struct tty_struct * tty)2905 static void cy_stop(struct tty_struct *tty)
2906 {
2907 struct cyclades_card *cinfo;
2908 struct cyclades_port *info = tty->driver_data;
2909 int channel;
2910 unsigned long flags;
2911
2912 #ifdef CY_DEBUG_OTHER
2913 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
2914 #endif
2915
2916 if (serial_paranoia_check(info, tty->name, "cy_stop"))
2917 return;
2918
2919 cinfo = info->card;
2920 channel = info->line - cinfo->first_line;
2921 if (!cy_is_Z(cinfo)) {
2922 spin_lock_irqsave(&cinfo->card_lock, flags);
2923 cyy_writeb(info, CyCAR, channel & 0x03);
2924 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
2925 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2926 }
2927 } /* cy_stop */
2928
cy_start(struct tty_struct * tty)2929 static void cy_start(struct tty_struct *tty)
2930 {
2931 struct cyclades_card *cinfo;
2932 struct cyclades_port *info = tty->driver_data;
2933 int channel;
2934 unsigned long flags;
2935
2936 #ifdef CY_DEBUG_OTHER
2937 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
2938 #endif
2939
2940 if (serial_paranoia_check(info, tty->name, "cy_start"))
2941 return;
2942
2943 cinfo = info->card;
2944 channel = info->line - cinfo->first_line;
2945 if (!cy_is_Z(cinfo)) {
2946 spin_lock_irqsave(&cinfo->card_lock, flags);
2947 cyy_writeb(info, CyCAR, channel & 0x03);
2948 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
2949 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2950 }
2951 } /* cy_start */
2952
2953 /*
2954 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
2955 */
cy_hangup(struct tty_struct * tty)2956 static void cy_hangup(struct tty_struct *tty)
2957 {
2958 struct cyclades_port *info = tty->driver_data;
2959
2960 #ifdef CY_DEBUG_OTHER
2961 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
2962 #endif
2963
2964 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
2965 return;
2966
2967 cy_flush_buffer(tty);
2968 cy_shutdown(info, tty);
2969 tty_port_hangup(&info->port);
2970 } /* cy_hangup */
2971
cyy_carrier_raised(struct tty_port * port)2972 static int cyy_carrier_raised(struct tty_port *port)
2973 {
2974 struct cyclades_port *info = container_of(port, struct cyclades_port,
2975 port);
2976 struct cyclades_card *cinfo = info->card;
2977 unsigned long flags;
2978 int channel = info->line - cinfo->first_line;
2979 u32 cd;
2980
2981 spin_lock_irqsave(&cinfo->card_lock, flags);
2982 cyy_writeb(info, CyCAR, channel & 0x03);
2983 cd = cyy_readb(info, CyMSVR1) & CyDCD;
2984 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2985
2986 return cd;
2987 }
2988
cyy_dtr_rts(struct tty_port * port,int raise)2989 static void cyy_dtr_rts(struct tty_port *port, int raise)
2990 {
2991 struct cyclades_port *info = container_of(port, struct cyclades_port,
2992 port);
2993 struct cyclades_card *cinfo = info->card;
2994 unsigned long flags;
2995
2996 spin_lock_irqsave(&cinfo->card_lock, flags);
2997 cyy_change_rts_dtr(info, raise ? TIOCM_RTS | TIOCM_DTR : 0,
2998 raise ? 0 : TIOCM_RTS | TIOCM_DTR);
2999 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3000 }
3001
cyz_carrier_raised(struct tty_port * port)3002 static int cyz_carrier_raised(struct tty_port *port)
3003 {
3004 struct cyclades_port *info = container_of(port, struct cyclades_port,
3005 port);
3006
3007 return readl(&info->u.cyz.ch_ctrl->rs_status) & C_RS_DCD;
3008 }
3009
cyz_dtr_rts(struct tty_port * port,int raise)3010 static void cyz_dtr_rts(struct tty_port *port, int raise)
3011 {
3012 struct cyclades_port *info = container_of(port, struct cyclades_port,
3013 port);
3014 struct cyclades_card *cinfo = info->card;
3015 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
3016 int ret, channel = info->line - cinfo->first_line;
3017 u32 rs;
3018
3019 rs = readl(&ch_ctrl->rs_control);
3020 if (raise)
3021 rs |= C_RS_RTS | C_RS_DTR;
3022 else
3023 rs &= ~(C_RS_RTS | C_RS_DTR);
3024 cy_writel(&ch_ctrl->rs_control, rs);
3025 ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L);
3026 if (ret != 0)
3027 printk(KERN_ERR "%s: retval on ttyC%d was %x\n",
3028 __func__, info->line, ret);
3029 #ifdef CY_DEBUG_DTR
3030 printk(KERN_DEBUG "%s: raising Z DTR\n", __func__);
3031 #endif
3032 }
3033
3034 static const struct tty_port_operations cyy_port_ops = {
3035 .carrier_raised = cyy_carrier_raised,
3036 .dtr_rts = cyy_dtr_rts,
3037 .shutdown = cy_do_close,
3038 };
3039
3040 static const struct tty_port_operations cyz_port_ops = {
3041 .carrier_raised = cyz_carrier_raised,
3042 .dtr_rts = cyz_dtr_rts,
3043 .shutdown = cy_do_close,
3044 };
3045
3046 /*
3047 * ---------------------------------------------------------------------
3048 * cy_init() and friends
3049 *
3050 * cy_init() is called at boot-time to initialize the serial driver.
3051 * ---------------------------------------------------------------------
3052 */
3053
cy_init_card(struct cyclades_card * cinfo)3054 static int cy_init_card(struct cyclades_card *cinfo)
3055 {
3056 struct cyclades_port *info;
3057 unsigned int channel, port;
3058
3059 spin_lock_init(&cinfo->card_lock);
3060 cinfo->intr_enabled = 0;
3061
3062 cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
3063 GFP_KERNEL);
3064 if (cinfo->ports == NULL) {
3065 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
3066 return -ENOMEM;
3067 }
3068
3069 for (channel = 0, port = cinfo->first_line; channel < cinfo->nports;
3070 channel++, port++) {
3071 info = &cinfo->ports[channel];
3072 tty_port_init(&info->port);
3073 info->magic = CYCLADES_MAGIC;
3074 info->card = cinfo;
3075 info->line = port;
3076
3077 info->port.closing_wait = CLOSING_WAIT_DELAY;
3078 info->port.close_delay = 5 * HZ / 10;
3079 init_completion(&info->shutdown_wait);
3080
3081 if (cy_is_Z(cinfo)) {
3082 struct FIRM_ID *firm_id = cinfo->base_addr + ID_ADDRESS;
3083 struct ZFW_CTRL *zfw_ctrl;
3084
3085 info->port.ops = &cyz_port_ops;
3086 info->type = PORT_STARTECH;
3087
3088 zfw_ctrl = cinfo->base_addr +
3089 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3090 info->u.cyz.ch_ctrl = &zfw_ctrl->ch_ctrl[channel];
3091 info->u.cyz.buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3092
3093 if (cinfo->hw_ver == ZO_V1)
3094 info->xmit_fifo_size = CYZ_FIFO_SIZE;
3095 else
3096 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
3097 #ifdef CONFIG_CYZ_INTR
3098 timer_setup(&info->rx_full_timer, cyz_rx_restart, 0);
3099 #endif
3100 } else {
3101 unsigned short chip_number;
3102 int index = cinfo->bus_index;
3103
3104 info->port.ops = &cyy_port_ops;
3105 info->type = PORT_CIRRUS;
3106 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
3107 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
3108 info->cor2 = CyETC;
3109 info->cor3 = 0x08; /* _very_ small rcv threshold */
3110
3111 chip_number = channel / CyPORTS_PER_CHIP;
3112 info->u.cyy.base_addr = cinfo->base_addr +
3113 (cy_chip_offset[chip_number] << index);
3114 info->chip_rev = cyy_readb(info, CyGFRCR);
3115
3116 if (info->chip_rev >= CD1400_REV_J) {
3117 /* It is a CD1400 rev. J or later */
3118 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
3119 info->tco = baud_co_60[13]; /* Tx CO */
3120 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
3121 info->rco = baud_co_60[13]; /* Rx CO */
3122 info->rtsdtr_inv = 1;
3123 } else {
3124 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
3125 info->tco = baud_co_25[13]; /* Tx CO */
3126 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
3127 info->rco = baud_co_25[13]; /* Rx CO */
3128 info->rtsdtr_inv = 0;
3129 }
3130 info->read_status_mask = CyTIMEOUT | CySPECHAR |
3131 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
3132 }
3133
3134 }
3135
3136 #ifndef CONFIG_CYZ_INTR
3137 if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
3138 mod_timer(&cyz_timerlist, jiffies + 1);
3139 #ifdef CY_PCI_DEBUG
3140 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
3141 #endif
3142 }
3143 #endif
3144 return 0;
3145 }
3146
3147 /* initialize chips on Cyclom-Y card -- return number of valid
3148 chips (which is number of ports/4) */
cyy_init_card(void __iomem * true_base_addr,int index)3149 static unsigned short cyy_init_card(void __iomem *true_base_addr,
3150 int index)
3151 {
3152 unsigned int chip_number;
3153 void __iomem *base_addr;
3154
3155 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
3156 /* Cy_HwReset is 0x1400 */
3157 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
3158 /* Cy_ClrIntr is 0x1800 */
3159 udelay(500L);
3160
3161 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
3162 chip_number++) {
3163 base_addr =
3164 true_base_addr + (cy_chip_offset[chip_number] << index);
3165 mdelay(1);
3166 if (readb(base_addr + (CyCCR << index)) != 0x00) {
3167 /*************
3168 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
3169 chip_number, (unsigned long)base_addr);
3170 *************/
3171 return chip_number;
3172 }
3173
3174 cy_writeb(base_addr + (CyGFRCR << index), 0);
3175 udelay(10L);
3176
3177 /* The Cyclom-16Y does not decode address bit 9 and therefore
3178 cannot distinguish between references to chip 0 and a non-
3179 existent chip 4. If the preceding clearing of the supposed
3180 chip 4 GFRCR register appears at chip 0, there is no chip 4
3181 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
3182 */
3183 if (chip_number == 4 && readb(true_base_addr +
3184 (cy_chip_offset[0] << index) +
3185 (CyGFRCR << index)) == 0) {
3186 return chip_number;
3187 }
3188
3189 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
3190 mdelay(1);
3191
3192 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
3193 /*
3194 printk(" chip #%d at %#6lx is not responding ",
3195 chip_number, (unsigned long)base_addr);
3196 printk("(GFRCR stayed 0)\n",
3197 */
3198 return chip_number;
3199 }
3200 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
3201 0x40) {
3202 /*
3203 printk(" chip #%d at %#6lx is not valid (GFRCR == "
3204 "%#2x)\n",
3205 chip_number, (unsigned long)base_addr,
3206 base_addr[CyGFRCR<<index]);
3207 */
3208 return chip_number;
3209 }
3210 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
3211 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
3212 /* It is a CD1400 rev. J or later */
3213 /* Impossible to reach 5ms with this chip.
3214 Changed to 2ms instead (f = 500 Hz). */
3215 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
3216 } else {
3217 /* f = 200 Hz */
3218 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
3219 }
3220
3221 /*
3222 printk(" chip #%d at %#6lx is rev 0x%2x\n",
3223 chip_number, (unsigned long)base_addr,
3224 readb(base_addr+(CyGFRCR<<index)));
3225 */
3226 }
3227 return chip_number;
3228 } /* cyy_init_card */
3229
3230 /*
3231 * ---------------------------------------------------------------------
3232 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
3233 * sets global variables and return the number of ISA boards found.
3234 * ---------------------------------------------------------------------
3235 */
cy_detect_isa(void)3236 static int __init cy_detect_isa(void)
3237 {
3238 #ifdef CONFIG_ISA
3239 struct cyclades_card *card;
3240 unsigned short cy_isa_irq, nboard;
3241 void __iomem *cy_isa_address;
3242 unsigned short i, j, k, cy_isa_nchan;
3243 int isparam = 0;
3244
3245 nboard = 0;
3246
3247 /* Check for module parameters */
3248 for (i = 0; i < NR_CARDS; i++) {
3249 if (maddr[i] || i) {
3250 isparam = 1;
3251 cy_isa_addresses[i] = maddr[i];
3252 }
3253 if (!maddr[i])
3254 break;
3255 }
3256
3257 /* scan the address table probing for Cyclom-Y/ISA boards */
3258 for (i = 0; i < NR_ISA_ADDRS; i++) {
3259 unsigned int isa_address = cy_isa_addresses[i];
3260 if (isa_address == 0x0000)
3261 return nboard;
3262
3263 /* probe for CD1400... */
3264 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
3265 if (cy_isa_address == NULL) {
3266 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
3267 "address\n");
3268 continue;
3269 }
3270 cy_isa_nchan = CyPORTS_PER_CHIP *
3271 cyy_init_card(cy_isa_address, 0);
3272 if (cy_isa_nchan == 0) {
3273 iounmap(cy_isa_address);
3274 continue;
3275 }
3276
3277 if (isparam && i < NR_CARDS && irq[i])
3278 cy_isa_irq = irq[i];
3279 else
3280 /* find out the board's irq by probing */
3281 cy_isa_irq = detect_isa_irq(cy_isa_address);
3282 if (cy_isa_irq == 0) {
3283 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
3284 "IRQ could not be detected.\n",
3285 (unsigned long)cy_isa_address);
3286 iounmap(cy_isa_address);
3287 continue;
3288 }
3289
3290 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
3291 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
3292 "more channels are available. Change NR_PORTS "
3293 "in cyclades.c and recompile kernel.\n",
3294 (unsigned long)cy_isa_address);
3295 iounmap(cy_isa_address);
3296 return nboard;
3297 }
3298 /* fill the next cy_card structure available */
3299 for (j = 0; j < NR_CARDS; j++) {
3300 card = &cy_card[j];
3301 if (card->base_addr == NULL)
3302 break;
3303 }
3304 if (j == NR_CARDS) { /* no more cy_cards available */
3305 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
3306 "more cards can be used. Change NR_CARDS in "
3307 "cyclades.c and recompile kernel.\n",
3308 (unsigned long)cy_isa_address);
3309 iounmap(cy_isa_address);
3310 return nboard;
3311 }
3312
3313 /* allocate IRQ */
3314 if (request_irq(cy_isa_irq, cyy_interrupt,
3315 0, "Cyclom-Y", card)) {
3316 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
3317 "could not allocate IRQ#%d.\n",
3318 (unsigned long)cy_isa_address, cy_isa_irq);
3319 iounmap(cy_isa_address);
3320 return nboard;
3321 }
3322
3323 /* set cy_card */
3324 card->base_addr = cy_isa_address;
3325 card->ctl_addr.p9050 = NULL;
3326 card->irq = (int)cy_isa_irq;
3327 card->bus_index = 0;
3328 card->first_line = cy_next_channel;
3329 card->num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
3330 card->nports = cy_isa_nchan;
3331 if (cy_init_card(card)) {
3332 card->base_addr = NULL;
3333 free_irq(cy_isa_irq, card);
3334 iounmap(cy_isa_address);
3335 continue;
3336 }
3337 nboard++;
3338
3339 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
3340 "%d channels starting from port %d\n",
3341 j + 1, (unsigned long)cy_isa_address,
3342 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
3343 cy_isa_irq, cy_isa_nchan, cy_next_channel);
3344
3345 for (k = 0, j = cy_next_channel;
3346 j < cy_next_channel + cy_isa_nchan; j++, k++)
3347 tty_port_register_device(&card->ports[k].port,
3348 cy_serial_driver, j, NULL);
3349 cy_next_channel += cy_isa_nchan;
3350 }
3351 return nboard;
3352 #else
3353 return 0;
3354 #endif /* CONFIG_ISA */
3355 } /* cy_detect_isa */
3356
3357 #ifdef CONFIG_PCI
cyc_isfwstr(const char * str,unsigned int size)3358 static inline int cyc_isfwstr(const char *str, unsigned int size)
3359 {
3360 unsigned int a;
3361
3362 for (a = 0; a < size && *str; a++, str++)
3363 if (*str & 0x80)
3364 return -EINVAL;
3365
3366 for (; a < size; a++, str++)
3367 if (*str)
3368 return -EINVAL;
3369
3370 return 0;
3371 }
3372
cyz_fpga_copy(void __iomem * fpga,const u8 * data,unsigned int size)3373 static inline void cyz_fpga_copy(void __iomem *fpga, const u8 *data,
3374 unsigned int size)
3375 {
3376 for (; size > 0; size--) {
3377 cy_writel(fpga, *data++);
3378 udelay(10);
3379 }
3380 }
3381
plx_init(struct pci_dev * pdev,int irq,struct RUNTIME_9060 __iomem * addr)3382 static void plx_init(struct pci_dev *pdev, int irq,
3383 struct RUNTIME_9060 __iomem *addr)
3384 {
3385 /* Reset PLX */
3386 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
3387 udelay(100L);
3388 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
3389
3390 /* Reload Config. Registers from EEPROM */
3391 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
3392 udelay(100L);
3393 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
3394
3395 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
3396 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
3397 * registers. This will remain here until we find a permanent fix.
3398 */
3399 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
3400 }
3401
__cyz_load_fw(const struct firmware * fw,const char * name,const u32 mailbox,void __iomem * base,void __iomem * fpga)3402 static int __cyz_load_fw(const struct firmware *fw,
3403 const char *name, const u32 mailbox, void __iomem *base,
3404 void __iomem *fpga)
3405 {
3406 const void *ptr = fw->data;
3407 const struct zfile_header *h = ptr;
3408 const struct zfile_config *c, *cs;
3409 const struct zfile_block *b, *bs;
3410 unsigned int a, tmp, len = fw->size;
3411 #define BAD_FW KERN_ERR "Bad firmware: "
3412 if (len < sizeof(*h)) {
3413 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
3414 return -EINVAL;
3415 }
3416
3417 cs = ptr + h->config_offset;
3418 bs = ptr + h->block_offset;
3419
3420 if ((void *)(cs + h->n_config) > ptr + len ||
3421 (void *)(bs + h->n_blocks) > ptr + len) {
3422 printk(BAD_FW "too short");
3423 return -EINVAL;
3424 }
3425
3426 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
3427 cyc_isfwstr(h->date, sizeof(h->date))) {
3428 printk(BAD_FW "bad formatted header string\n");
3429 return -EINVAL;
3430 }
3431
3432 if (strncmp(name, h->name, sizeof(h->name))) {
3433 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
3434 return -EINVAL;
3435 }
3436
3437 tmp = 0;
3438 for (c = cs; c < cs + h->n_config; c++) {
3439 for (a = 0; a < c->n_blocks; a++)
3440 if (c->block_list[a] > h->n_blocks) {
3441 printk(BAD_FW "bad block ref number in cfgs\n");
3442 return -EINVAL;
3443 }
3444 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
3445 tmp++;
3446 }
3447 if (!tmp) {
3448 printk(BAD_FW "nothing appropriate\n");
3449 return -EINVAL;
3450 }
3451
3452 for (b = bs; b < bs + h->n_blocks; b++)
3453 if (b->file_offset + b->size > len) {
3454 printk(BAD_FW "bad block data offset\n");
3455 return -EINVAL;
3456 }
3457
3458 /* everything is OK, let's seek'n'load it */
3459 for (c = cs; c < cs + h->n_config; c++)
3460 if (c->mailbox == mailbox && c->function == 0)
3461 break;
3462
3463 for (a = 0; a < c->n_blocks; a++) {
3464 b = &bs[c->block_list[a]];
3465 if (b->type == ZBLOCK_FPGA) {
3466 if (fpga != NULL)
3467 cyz_fpga_copy(fpga, ptr + b->file_offset,
3468 b->size);
3469 } else {
3470 if (base != NULL)
3471 memcpy_toio(base + b->ram_offset,
3472 ptr + b->file_offset, b->size);
3473 }
3474 }
3475 #undef BAD_FW
3476 return 0;
3477 }
3478
cyz_load_fw(struct pci_dev * pdev,void __iomem * base_addr,struct RUNTIME_9060 __iomem * ctl_addr,int irq)3479 static int cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
3480 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
3481 {
3482 const struct firmware *fw;
3483 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
3484 struct CUSTOM_REG __iomem *cust = base_addr;
3485 struct ZFW_CTRL __iomem *pt_zfwctrl;
3486 void __iomem *tmp;
3487 u32 mailbox, status, nchan;
3488 unsigned int i;
3489 int retval;
3490
3491 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
3492 if (retval) {
3493 dev_err(&pdev->dev, "can't get firmware\n");
3494 goto err;
3495 }
3496
3497 /* Check whether the firmware is already loaded and running. If
3498 positive, skip this board */
3499 if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
3500 u32 cntval = readl(base_addr + 0x190);
3501
3502 udelay(100);
3503 if (cntval != readl(base_addr + 0x190)) {
3504 /* FW counter is working, FW is running */
3505 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
3506 "Skipping board.\n");
3507 retval = 0;
3508 goto err_rel;
3509 }
3510 }
3511
3512 /* start boot */
3513 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
3514 ~0x00030800UL);
3515
3516 mailbox = readl(&ctl_addr->mail_box_0);
3517
3518 if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
3519 /* stops CPU and set window to beginning of RAM */
3520 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3521 cy_writel(&cust->cpu_stop, 0);
3522 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3523 udelay(100);
3524 }
3525
3526 plx_init(pdev, irq, ctl_addr);
3527
3528 if (mailbox != 0) {
3529 /* load FPGA */
3530 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
3531 base_addr);
3532 if (retval)
3533 goto err_rel;
3534 if (!__cyz_fpga_loaded(ctl_addr)) {
3535 dev_err(&pdev->dev, "fw upload successful, but fw is "
3536 "not loaded\n");
3537 goto err_rel;
3538 }
3539 }
3540
3541 /* stops CPU and set window to beginning of RAM */
3542 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3543 cy_writel(&cust->cpu_stop, 0);
3544 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3545 udelay(100);
3546
3547 /* clear memory */
3548 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
3549 cy_writeb(tmp, 255);
3550 if (mailbox != 0) {
3551 /* set window to last 512K of RAM */
3552 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
3553 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
3554 cy_writeb(tmp, 255);
3555 /* set window to beginning of RAM */
3556 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3557 }
3558
3559 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
3560 release_firmware(fw);
3561 if (retval)
3562 goto err;
3563
3564 /* finish boot and start boards */
3565 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3566 cy_writel(&cust->cpu_start, 0);
3567 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3568 i = 0;
3569 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
3570 msleep(100);
3571 if (status != ZFIRM_ID) {
3572 if (status == ZFIRM_HLT) {
3573 dev_err(&pdev->dev, "you need an external power supply "
3574 "for this number of ports. Firmware halted and "
3575 "board reset.\n");
3576 retval = -EIO;
3577 goto err;
3578 }
3579 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
3580 "some more time\n", status);
3581 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
3582 i++ < 200)
3583 msleep(100);
3584 if (status != ZFIRM_ID) {
3585 dev_err(&pdev->dev, "Board not started in 20 seconds! "
3586 "Giving up. (fid->signature = 0x%x)\n",
3587 status);
3588 dev_info(&pdev->dev, "*** Warning ***: if you are "
3589 "upgrading the FW, please power cycle the "
3590 "system before loading the new FW to the "
3591 "Cyclades-Z.\n");
3592
3593 if (__cyz_fpga_loaded(ctl_addr))
3594 plx_init(pdev, irq, ctl_addr);
3595
3596 retval = -EIO;
3597 goto err;
3598 }
3599 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
3600 i / 10);
3601 }
3602 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
3603
3604 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
3605 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
3606 base_addr + readl(&fid->zfwctrl_addr));
3607
3608 nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
3609 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
3610 readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
3611
3612 if (nchan == 0) {
3613 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
3614 "check the connection between the Z host card and the "
3615 "serial expanders.\n");
3616
3617 if (__cyz_fpga_loaded(ctl_addr))
3618 plx_init(pdev, irq, ctl_addr);
3619
3620 dev_info(&pdev->dev, "Null number of ports detected. Board "
3621 "reset.\n");
3622 retval = 0;
3623 goto err;
3624 }
3625
3626 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
3627 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
3628
3629 /*
3630 Early firmware failed to start looking for commands.
3631 This enables firmware interrupts for those commands.
3632 */
3633 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
3634 (1 << 17));
3635 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
3636 0x00030800UL);
3637
3638 return nchan;
3639 err_rel:
3640 release_firmware(fw);
3641 err:
3642 return retval;
3643 }
3644
cy_pci_probe(struct pci_dev * pdev,const struct pci_device_id * ent)3645 static int cy_pci_probe(struct pci_dev *pdev,
3646 const struct pci_device_id *ent)
3647 {
3648 struct cyclades_card *card;
3649 void __iomem *addr0 = NULL, *addr2 = NULL;
3650 char *card_name = NULL;
3651 u32 uninitialized_var(mailbox);
3652 unsigned int device_id, nchan = 0, card_no, i, j;
3653 unsigned char plx_ver;
3654 int retval, irq;
3655
3656 retval = pci_enable_device(pdev);
3657 if (retval) {
3658 dev_err(&pdev->dev, "cannot enable device\n");
3659 goto err;
3660 }
3661
3662 /* read PCI configuration area */
3663 irq = pdev->irq;
3664 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
3665
3666 #if defined(__alpha__)
3667 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
3668 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
3669 "addresses on Alpha systems.\n");
3670 retval = -EIO;
3671 goto err_dis;
3672 }
3673 #endif
3674 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
3675 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
3676 "addresses\n");
3677 retval = -EIO;
3678 goto err_dis;
3679 }
3680
3681 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
3682 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
3683 "it...\n");
3684 pdev->resource[2].flags &= ~IORESOURCE_IO;
3685 }
3686
3687 retval = pci_request_regions(pdev, "cyclades");
3688 if (retval) {
3689 dev_err(&pdev->dev, "failed to reserve resources\n");
3690 goto err_dis;
3691 }
3692
3693 retval = -EIO;
3694 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3695 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3696 card_name = "Cyclom-Y";
3697
3698 addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
3699 CyPCI_Yctl);
3700 if (addr0 == NULL) {
3701 dev_err(&pdev->dev, "can't remap ctl region\n");
3702 goto err_reg;
3703 }
3704 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
3705 CyPCI_Ywin);
3706 if (addr2 == NULL) {
3707 dev_err(&pdev->dev, "can't remap base region\n");
3708 goto err_unmap;
3709 }
3710
3711 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
3712 if (nchan == 0) {
3713 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
3714 "Serial-Modules\n");
3715 goto err_unmap;
3716 }
3717 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
3718 struct RUNTIME_9060 __iomem *ctl_addr;
3719
3720 ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
3721 CyPCI_Zctl);
3722 if (addr0 == NULL) {
3723 dev_err(&pdev->dev, "can't remap ctl region\n");
3724 goto err_reg;
3725 }
3726
3727 /* Disable interrupts on the PLX before resetting it */
3728 cy_writew(&ctl_addr->intr_ctrl_stat,
3729 readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
3730
3731 plx_init(pdev, irq, addr0);
3732
3733 mailbox = readl(&ctl_addr->mail_box_0);
3734
3735 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
3736 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
3737 if (addr2 == NULL) {
3738 dev_err(&pdev->dev, "can't remap base region\n");
3739 goto err_unmap;
3740 }
3741
3742 if (mailbox == ZE_V1) {
3743 card_name = "Cyclades-Ze";
3744 } else {
3745 card_name = "Cyclades-8Zo";
3746 #ifdef CY_PCI_DEBUG
3747 if (mailbox == ZO_V1) {
3748 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3749 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
3750 "id %lx, ver %lx\n", (ulong)(0xff &
3751 readl(&((struct CUSTOM_REG *)addr2)->
3752 fpga_id)), (ulong)(0xff &
3753 readl(&((struct CUSTOM_REG *)addr2)->
3754 fpga_version)));
3755 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3756 } else {
3757 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
3758 "Cyclades-Z board. FPGA not loaded\n");
3759 }
3760 #endif
3761 /* The following clears the firmware id word. This
3762 ensures that the driver will not attempt to talk to
3763 the board until it has been properly initialized.
3764 */
3765 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
3766 cy_writel(addr2 + ID_ADDRESS, 0L);
3767 }
3768
3769 retval = cyz_load_fw(pdev, addr2, addr0, irq);
3770 if (retval <= 0)
3771 goto err_unmap;
3772 nchan = retval;
3773 }
3774
3775 if ((cy_next_channel + nchan) > NR_PORTS) {
3776 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
3777 "channels are available. Change NR_PORTS in "
3778 "cyclades.c and recompile kernel.\n");
3779 goto err_unmap;
3780 }
3781 /* fill the next cy_card structure available */
3782 for (card_no = 0; card_no < NR_CARDS; card_no++) {
3783 card = &cy_card[card_no];
3784 if (card->base_addr == NULL)
3785 break;
3786 }
3787 if (card_no == NR_CARDS) { /* no more cy_cards available */
3788 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
3789 "more cards can be used. Change NR_CARDS in "
3790 "cyclades.c and recompile kernel.\n");
3791 goto err_unmap;
3792 }
3793
3794 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3795 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3796 /* allocate IRQ */
3797 retval = request_irq(irq, cyy_interrupt,
3798 IRQF_SHARED, "Cyclom-Y", card);
3799 if (retval) {
3800 dev_err(&pdev->dev, "could not allocate IRQ\n");
3801 goto err_unmap;
3802 }
3803 card->num_chips = nchan / CyPORTS_PER_CHIP;
3804 } else {
3805 struct FIRM_ID __iomem *firm_id = addr2 + ID_ADDRESS;
3806 struct ZFW_CTRL __iomem *zfw_ctrl;
3807
3808 zfw_ctrl = addr2 + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3809
3810 card->hw_ver = mailbox;
3811 card->num_chips = (unsigned int)-1;
3812 card->board_ctrl = &zfw_ctrl->board_ctrl;
3813 #ifdef CONFIG_CYZ_INTR
3814 /* allocate IRQ only if board has an IRQ */
3815 if (irq != 0 && irq != 255) {
3816 retval = request_irq(irq, cyz_interrupt,
3817 IRQF_SHARED, "Cyclades-Z", card);
3818 if (retval) {
3819 dev_err(&pdev->dev, "could not allocate IRQ\n");
3820 goto err_unmap;
3821 }
3822 }
3823 #endif /* CONFIG_CYZ_INTR */
3824 }
3825
3826 /* set cy_card */
3827 card->base_addr = addr2;
3828 card->ctl_addr.p9050 = addr0;
3829 card->irq = irq;
3830 card->bus_index = 1;
3831 card->first_line = cy_next_channel;
3832 card->nports = nchan;
3833 retval = cy_init_card(card);
3834 if (retval)
3835 goto err_null;
3836
3837 pci_set_drvdata(pdev, card);
3838
3839 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3840 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3841 /* enable interrupts in the PCI interface */
3842 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
3843 switch (plx_ver) {
3844 case PLX_9050:
3845 cy_writeb(addr0 + 0x4c, 0x43);
3846 break;
3847
3848 case PLX_9060:
3849 case PLX_9080:
3850 default: /* Old boards, use PLX_9060 */
3851 {
3852 struct RUNTIME_9060 __iomem *ctl_addr = addr0;
3853 plx_init(pdev, irq, ctl_addr);
3854 cy_writew(&ctl_addr->intr_ctrl_stat,
3855 readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
3856 break;
3857 }
3858 }
3859 }
3860
3861 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
3862 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
3863 for (j = 0, i = cy_next_channel; i < cy_next_channel + nchan; i++, j++)
3864 tty_port_register_device(&card->ports[j].port,
3865 cy_serial_driver, i, &pdev->dev);
3866 cy_next_channel += nchan;
3867
3868 return 0;
3869 err_null:
3870 card->base_addr = NULL;
3871 free_irq(irq, card);
3872 err_unmap:
3873 iounmap(addr0);
3874 if (addr2)
3875 iounmap(addr2);
3876 err_reg:
3877 pci_release_regions(pdev);
3878 err_dis:
3879 pci_disable_device(pdev);
3880 err:
3881 return retval;
3882 }
3883
cy_pci_remove(struct pci_dev * pdev)3884 static void cy_pci_remove(struct pci_dev *pdev)
3885 {
3886 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
3887 unsigned int i, channel;
3888
3889 /* non-Z with old PLX */
3890 if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
3891 PLX_9050)
3892 cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
3893 else
3894 #ifndef CONFIG_CYZ_INTR
3895 if (!cy_is_Z(cinfo))
3896 #endif
3897 cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
3898 readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
3899 ~0x0900);
3900
3901 iounmap(cinfo->base_addr);
3902 if (cinfo->ctl_addr.p9050)
3903 iounmap(cinfo->ctl_addr.p9050);
3904 if (cinfo->irq
3905 #ifndef CONFIG_CYZ_INTR
3906 && !cy_is_Z(cinfo)
3907 #endif /* CONFIG_CYZ_INTR */
3908 )
3909 free_irq(cinfo->irq, cinfo);
3910 pci_release_regions(pdev);
3911
3912 cinfo->base_addr = NULL;
3913 for (channel = 0, i = cinfo->first_line; i < cinfo->first_line +
3914 cinfo->nports; i++, channel++) {
3915 tty_unregister_device(cy_serial_driver, i);
3916 tty_port_destroy(&cinfo->ports[channel].port);
3917 }
3918 cinfo->nports = 0;
3919 kfree(cinfo->ports);
3920 }
3921
3922 static struct pci_driver cy_pci_driver = {
3923 .name = "cyclades",
3924 .id_table = cy_pci_dev_id,
3925 .probe = cy_pci_probe,
3926 .remove = cy_pci_remove
3927 };
3928 #endif
3929
cyclades_proc_show(struct seq_file * m,void * v)3930 static int cyclades_proc_show(struct seq_file *m, void *v)
3931 {
3932 struct cyclades_port *info;
3933 unsigned int i, j;
3934 __u32 cur_jifs = jiffies;
3935
3936 seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
3937 "IdleIn Overruns Ldisc\n");
3938
3939 /* Output one line for each known port */
3940 for (i = 0; i < NR_CARDS; i++)
3941 for (j = 0; j < cy_card[i].nports; j++) {
3942 info = &cy_card[i].ports[j];
3943
3944 if (info->port.count) {
3945 /* XXX is the ldisc num worth this? */
3946 struct tty_struct *tty;
3947 struct tty_ldisc *ld;
3948 int num = 0;
3949 tty = tty_port_tty_get(&info->port);
3950 if (tty) {
3951 ld = tty_ldisc_ref(tty);
3952 if (ld) {
3953 num = ld->ops->num;
3954 tty_ldisc_deref(ld);
3955 }
3956 tty_kref_put(tty);
3957 }
3958 seq_printf(m, "%3d %8lu %10lu %8lu "
3959 "%10lu %8lu %9lu %6d\n", info->line,
3960 (cur_jifs - info->idle_stats.in_use) /
3961 HZ, info->idle_stats.xmit_bytes,
3962 (cur_jifs - info->idle_stats.xmit_idle)/
3963 HZ, info->idle_stats.recv_bytes,
3964 (cur_jifs - info->idle_stats.recv_idle)/
3965 HZ, info->idle_stats.overruns,
3966 num);
3967 } else
3968 seq_printf(m, "%3d %8lu %10lu %8lu "
3969 "%10lu %8lu %9lu %6ld\n",
3970 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
3971 }
3972 return 0;
3973 }
3974
3975 /* The serial driver boot-time initialization code!
3976 Hardware I/O ports are mapped to character special devices on a
3977 first found, first allocated manner. That is, this code searches
3978 for Cyclom cards in the system. As each is found, it is probed
3979 to discover how many chips (and thus how many ports) are present.
3980 These ports are mapped to the tty ports 32 and upward in monotonic
3981 fashion. If an 8-port card is replaced with a 16-port card, the
3982 port mapping on a following card will shift.
3983
3984 This approach is different from what is used in the other serial
3985 device driver because the Cyclom is more properly a multiplexer,
3986 not just an aggregation of serial ports on one card.
3987
3988 If there are more cards with more ports than have been
3989 statically allocated above, a warning is printed and the
3990 extra ports are ignored.
3991 */
3992
3993 static const struct tty_operations cy_ops = {
3994 .open = cy_open,
3995 .close = cy_close,
3996 .write = cy_write,
3997 .put_char = cy_put_char,
3998 .flush_chars = cy_flush_chars,
3999 .write_room = cy_write_room,
4000 .chars_in_buffer = cy_chars_in_buffer,
4001 .flush_buffer = cy_flush_buffer,
4002 .ioctl = cy_ioctl,
4003 .throttle = cy_throttle,
4004 .unthrottle = cy_unthrottle,
4005 .set_termios = cy_set_termios,
4006 .stop = cy_stop,
4007 .start = cy_start,
4008 .hangup = cy_hangup,
4009 .break_ctl = cy_break,
4010 .wait_until_sent = cy_wait_until_sent,
4011 .tiocmget = cy_tiocmget,
4012 .tiocmset = cy_tiocmset,
4013 .get_icount = cy_get_icount,
4014 .proc_show = cyclades_proc_show,
4015 };
4016
cy_init(void)4017 static int __init cy_init(void)
4018 {
4019 unsigned int nboards;
4020 int retval = -ENOMEM;
4021
4022 cy_serial_driver = alloc_tty_driver(NR_PORTS);
4023 if (!cy_serial_driver)
4024 goto err;
4025
4026 printk(KERN_INFO "Cyclades driver " CY_VERSION "\n");
4027
4028 /* Initialize the tty_driver structure */
4029
4030 cy_serial_driver->driver_name = "cyclades";
4031 cy_serial_driver->name = "ttyC";
4032 cy_serial_driver->major = CYCLADES_MAJOR;
4033 cy_serial_driver->minor_start = 0;
4034 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
4035 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
4036 cy_serial_driver->init_termios = tty_std_termios;
4037 cy_serial_driver->init_termios.c_cflag =
4038 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
4039 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4040 tty_set_operations(cy_serial_driver, &cy_ops);
4041
4042 retval = tty_register_driver(cy_serial_driver);
4043 if (retval) {
4044 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
4045 goto err_frtty;
4046 }
4047
4048 /* the code below is responsible to find the boards. Each different
4049 type of board has its own detection routine. If a board is found,
4050 the next cy_card structure available is set by the detection
4051 routine. These functions are responsible for checking the
4052 availability of cy_card and cy_port data structures and updating
4053 the cy_next_channel. */
4054
4055 /* look for isa boards */
4056 nboards = cy_detect_isa();
4057
4058 #ifdef CONFIG_PCI
4059 /* look for pci boards */
4060 retval = pci_register_driver(&cy_pci_driver);
4061 if (retval && !nboards) {
4062 tty_unregister_driver(cy_serial_driver);
4063 goto err_frtty;
4064 }
4065 #endif
4066
4067 return 0;
4068 err_frtty:
4069 put_tty_driver(cy_serial_driver);
4070 err:
4071 return retval;
4072 } /* cy_init */
4073
cy_cleanup_module(void)4074 static void __exit cy_cleanup_module(void)
4075 {
4076 struct cyclades_card *card;
4077 unsigned int i, e1;
4078
4079 #ifndef CONFIG_CYZ_INTR
4080 del_timer_sync(&cyz_timerlist);
4081 #endif /* CONFIG_CYZ_INTR */
4082
4083 e1 = tty_unregister_driver(cy_serial_driver);
4084 if (e1)
4085 printk(KERN_ERR "failed to unregister Cyclades serial "
4086 "driver(%d)\n", e1);
4087
4088 #ifdef CONFIG_PCI
4089 pci_unregister_driver(&cy_pci_driver);
4090 #endif
4091
4092 for (i = 0; i < NR_CARDS; i++) {
4093 card = &cy_card[i];
4094 if (card->base_addr) {
4095 /* clear interrupt */
4096 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
4097 iounmap(card->base_addr);
4098 if (card->ctl_addr.p9050)
4099 iounmap(card->ctl_addr.p9050);
4100 if (card->irq
4101 #ifndef CONFIG_CYZ_INTR
4102 && !cy_is_Z(card)
4103 #endif /* CONFIG_CYZ_INTR */
4104 )
4105 free_irq(card->irq, card);
4106 for (e1 = card->first_line; e1 < card->first_line +
4107 card->nports; e1++)
4108 tty_unregister_device(cy_serial_driver, e1);
4109 kfree(card->ports);
4110 }
4111 }
4112
4113 put_tty_driver(cy_serial_driver);
4114 } /* cy_cleanup_module */
4115
4116 module_init(cy_init);
4117 module_exit(cy_cleanup_module);
4118
4119 MODULE_LICENSE("GPL");
4120 MODULE_VERSION(CY_VERSION);
4121 MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);
4122 MODULE_FIRMWARE("cyzfirm.bin");
4123
