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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / serial / icom.c
blob53a46822705621ec0f776340381d94c672655e69
1 /*
2 * icom.c
3 *
4 * Copyright (C) 2001 IBM Corporation. All rights reserved.
5 *
6 * Serial device driver.
7 *
8 * Based on code from serial.c
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25 #define SERIAL_DO_RESTART
26 #include <linux/module.h>
27 #include <linux/kernel.h>
28 #include <linux/errno.h>
29 #include <linux/signal.h>
30 #include <linux/timer.h>
31 #include <linux/interrupt.h>
32 #include <linux/tty.h>
33 #include <linux/termios.h>
34 #include <linux/fs.h>
35 #include <linux/tty_flip.h>
36 #include <linux/serial.h>
37 #include <linux/serial_reg.h>
38 #include <linux/major.h>
39 #include <linux/string.h>
40 #include <linux/fcntl.h>
41 #include <linux/ptrace.h>
42 #include <linux/ioport.h>
43 #include <linux/mm.h>
44 #include <linux/slab.h>
45 #include <linux/init.h>
46 #include <linux/delay.h>
47 #include <linux/pci.h>
48 #include <linux/vmalloc.h>
49 #include <linux/smp.h>
50 #include <linux/spinlock.h>
51 #include <linux/kref.h>
52 #include <linux/firmware.h>
53 #include <linux/bitops.h>
54
55 #include <asm/system.h>
56 #include <asm/io.h>
57 #include <asm/irq.h>
58 #include <asm/uaccess.h>
59
60 #include "icom.h"
61
62 /*#define ICOM_TRACE enable port trace capabilities */
63
64 #define ICOM_DRIVER_NAME "icom"
65 #define ICOM_VERSION_STR "1.3.1"
66 #define NR_PORTS 128
67 #define ICOM_PORT ((struct icom_port *)port)
68 #define to_icom_adapter(d) container_of(d, struct icom_adapter, kref)
69
70 static const struct pci_device_id icom_pci_table[] = {
71 {
72 .vendor = PCI_VENDOR_ID_IBM,
73 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_1,
74 .subvendor = PCI_ANY_ID,
75 .subdevice = PCI_ANY_ID,
76 .driver_data = ADAPTER_V1,
77 },
78 {
79 .vendor = PCI_VENDOR_ID_IBM,
80 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
81 .subvendor = PCI_VENDOR_ID_IBM,
82 .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_TWO_PORTS_RVX,
83 .driver_data = ADAPTER_V2,
84 },
85 {
86 .vendor = PCI_VENDOR_ID_IBM,
87 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
88 .subvendor = PCI_VENDOR_ID_IBM,
89 .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM,
90 .driver_data = ADAPTER_V2,
91 },
92 {
93 .vendor = PCI_VENDOR_ID_IBM,
94 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
95 .subvendor = PCI_VENDOR_ID_IBM,
96 .subdevice = PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL,
97 .driver_data = ADAPTER_V2,
98 },
99 {
100 .vendor = PCI_VENDOR_ID_IBM,
101 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
102 .subvendor = PCI_VENDOR_ID_IBM,
103 .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM_PCIE,
104 .driver_data = ADAPTER_V2,
105 },
106 {}
107 };
108
109 struct lookup_proc_table start_proc[4] = {
110 {NULL, ICOM_CONTROL_START_A},
111 {NULL, ICOM_CONTROL_START_B},
112 {NULL, ICOM_CONTROL_START_C},
113 {NULL, ICOM_CONTROL_START_D}
114 };
115
116
117 struct lookup_proc_table stop_proc[4] = {
118 {NULL, ICOM_CONTROL_STOP_A},
119 {NULL, ICOM_CONTROL_STOP_B},
120 {NULL, ICOM_CONTROL_STOP_C},
121 {NULL, ICOM_CONTROL_STOP_D}
122 };
123
124 struct lookup_int_table int_mask_tbl[4] = {
125 {NULL, ICOM_INT_MASK_PRC_A},
126 {NULL, ICOM_INT_MASK_PRC_B},
127 {NULL, ICOM_INT_MASK_PRC_C},
128 {NULL, ICOM_INT_MASK_PRC_D},
129 };
130
131
132 MODULE_DEVICE_TABLE(pci, icom_pci_table);
133
134 static LIST_HEAD(icom_adapter_head);
135
136 /* spinlock for adapter initialization and changing adapter operations */
137 static spinlock_t icom_lock;
138
139 #ifdef ICOM_TRACE
140 static inline void trace(struct icom_port *icom_port, char *trace_pt,
141 unsigned long trace_data)
142 {
143 dev_info(&icom_port->adapter->pci_dev->dev, ":%d:%s - %lx\n",
144 icom_port->port, trace_pt, trace_data);
145 }
146 #else
147 static inline void trace(struct icom_port *icom_port, char *trace_pt, unsigned long trace_data) {};
148 #endif
149 static void icom_kref_release(struct kref *kref);
150
151 static void free_port_memory(struct icom_port *icom_port)
152 {
153 struct pci_dev *dev = icom_port->adapter->pci_dev;
154
155 trace(icom_port, "RET_PORT_MEM", 0);
156 if (icom_port->recv_buf) {
157 pci_free_consistent(dev, 4096, icom_port->recv_buf,
158 icom_port->recv_buf_pci);
159 icom_port->recv_buf = NULL;
160 }
161 if (icom_port->xmit_buf) {
162 pci_free_consistent(dev, 4096, icom_port->xmit_buf,
163 icom_port->xmit_buf_pci);
164 icom_port->xmit_buf = NULL;
165 }
166 if (icom_port->statStg) {
167 pci_free_consistent(dev, 4096, icom_port->statStg,
168 icom_port->statStg_pci);
169 icom_port->statStg = NULL;
170 }
171
172 if (icom_port->xmitRestart) {
173 pci_free_consistent(dev, 4096, icom_port->xmitRestart,
174 icom_port->xmitRestart_pci);
175 icom_port->xmitRestart = NULL;
176 }
177 }
178
179 static int __devinit get_port_memory(struct icom_port *icom_port)
180 {
181 int index;
182 unsigned long stgAddr;
183 unsigned long startStgAddr;
184 unsigned long offset;
185 struct pci_dev *dev = icom_port->adapter->pci_dev;
186
187 icom_port->xmit_buf =
188 pci_alloc_consistent(dev, 4096, &icom_port->xmit_buf_pci);
189 if (!icom_port->xmit_buf) {
190 dev_err(&dev->dev, "Can not allocate Transmit buffer\n");
191 return -ENOMEM;
192 }
193
194 trace(icom_port, "GET_PORT_MEM",
195 (unsigned long) icom_port->xmit_buf);
196
197 icom_port->recv_buf =
198 pci_alloc_consistent(dev, 4096, &icom_port->recv_buf_pci);
199 if (!icom_port->recv_buf) {
200 dev_err(&dev->dev, "Can not allocate Receive buffer\n");
201 free_port_memory(icom_port);
202 return -ENOMEM;
203 }
204 trace(icom_port, "GET_PORT_MEM",
205 (unsigned long) icom_port->recv_buf);
206
207 icom_port->statStg =
208 pci_alloc_consistent(dev, 4096, &icom_port->statStg_pci);
209 if (!icom_port->statStg) {
210 dev_err(&dev->dev, "Can not allocate Status buffer\n");
211 free_port_memory(icom_port);
212 return -ENOMEM;
213 }
214 trace(icom_port, "GET_PORT_MEM",
215 (unsigned long) icom_port->statStg);
216
217 icom_port->xmitRestart =
218 pci_alloc_consistent(dev, 4096, &icom_port->xmitRestart_pci);
219 if (!icom_port->xmitRestart) {
220 dev_err(&dev->dev,
221 "Can not allocate xmit Restart buffer\n");
222 free_port_memory(icom_port);
223 return -ENOMEM;
224 }
225
226 memset(icom_port->statStg, 0, 4096);
227
228 /* FODs: Frame Out Descriptor Queue, this is a FIFO queue that
229 indicates that frames are to be transmitted
230 */
231
232 stgAddr = (unsigned long) icom_port->statStg;
233 for (index = 0; index < NUM_XBUFFS; index++) {
234 trace(icom_port, "FOD_ADDR", stgAddr);
235 stgAddr = stgAddr + sizeof(icom_port->statStg->xmit[0]);
236 if (index < (NUM_XBUFFS - 1)) {
237 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
238 icom_port->statStg->xmit[index].leLengthASD =
239 (unsigned short int) cpu_to_le16(XMIT_BUFF_SZ);
240 trace(icom_port, "FOD_ADDR", stgAddr);
241 trace(icom_port, "FOD_XBUFF",
242 (unsigned long) icom_port->xmit_buf);
243 icom_port->statStg->xmit[index].leBuffer =
244 cpu_to_le32(icom_port->xmit_buf_pci);
245 } else if (index == (NUM_XBUFFS - 1)) {
246 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
247 icom_port->statStg->xmit[index].leLengthASD =
248 (unsigned short int) cpu_to_le16(XMIT_BUFF_SZ);
249 trace(icom_port, "FOD_XBUFF",
250 (unsigned long) icom_port->xmit_buf);
251 icom_port->statStg->xmit[index].leBuffer =
252 cpu_to_le32(icom_port->xmit_buf_pci);
253 } else {
254 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
255 }
256 }
257 /* FIDs */
258 startStgAddr = stgAddr;
259
260 /* fill in every entry, even if no buffer */
261 for (index = 0; index < NUM_RBUFFS; index++) {
262 trace(icom_port, "FID_ADDR", stgAddr);
263 stgAddr = stgAddr + sizeof(icom_port->statStg->rcv[0]);
264 icom_port->statStg->rcv[index].leLength = 0;
265 icom_port->statStg->rcv[index].WorkingLength =
266 (unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
267 if (index < (NUM_RBUFFS - 1) ) {
268 offset = stgAddr - (unsigned long) icom_port->statStg;
269 icom_port->statStg->rcv[index].leNext =
270 cpu_to_le32(icom_port-> statStg_pci + offset);
271 trace(icom_port, "FID_RBUFF",
272 (unsigned long) icom_port->recv_buf);
273 icom_port->statStg->rcv[index].leBuffer =
274 cpu_to_le32(icom_port->recv_buf_pci);
275 } else if (index == (NUM_RBUFFS -1) ) {
276 offset = startStgAddr - (unsigned long) icom_port->statStg;
277 icom_port->statStg->rcv[index].leNext =
278 cpu_to_le32(icom_port-> statStg_pci + offset);
279 trace(icom_port, "FID_RBUFF",
280 (unsigned long) icom_port->recv_buf + 2048);
281 icom_port->statStg->rcv[index].leBuffer =
282 cpu_to_le32(icom_port->recv_buf_pci + 2048);
283 } else {
284 icom_port->statStg->rcv[index].leNext = 0;
285 icom_port->statStg->rcv[index].leBuffer = 0;
286 }
287 }
288
289 return 0;
290 }
291
292 static void stop_processor(struct icom_port *icom_port)
293 {
294 unsigned long temp;
295 unsigned long flags;
296 int port;
297
298 spin_lock_irqsave(&icom_lock, flags);
299
300 port = icom_port->port;
301 if (port == 0 || port == 1)
302 stop_proc[port].global_control_reg = &icom_port->global_reg->control;
303 else
304 stop_proc[port].global_control_reg = &icom_port->global_reg->control_2;
305
306
307 if (port < 4) {
308 temp = readl(stop_proc[port].global_control_reg);
309 temp =
310 (temp & ~start_proc[port].processor_id) | stop_proc[port].processor_id;
311 writel(temp, stop_proc[port].global_control_reg);
312
313 /* write flush */
314 readl(stop_proc[port].global_control_reg);
315 } else {
316 dev_err(&icom_port->adapter->pci_dev->dev,
317 "Invalid port assignment\n");
318 }
319
320 spin_unlock_irqrestore(&icom_lock, flags);
321 }
322
323 static void start_processor(struct icom_port *icom_port)
324 {
325 unsigned long temp;
326 unsigned long flags;
327 int port;
328
329 spin_lock_irqsave(&icom_lock, flags);
330
331 port = icom_port->port;
332 if (port == 0 || port == 1)
333 start_proc[port].global_control_reg = &icom_port->global_reg->control;
334 else
335 start_proc[port].global_control_reg = &icom_port->global_reg->control_2;
336 if (port < 4) {
337 temp = readl(start_proc[port].global_control_reg);
338 temp =
339 (temp & ~stop_proc[port].processor_id) | start_proc[port].processor_id;
340 writel(temp, start_proc[port].global_control_reg);
341
342 /* write flush */
343 readl(start_proc[port].global_control_reg);
344 } else {
345 dev_err(&icom_port->adapter->pci_dev->dev,
346 "Invalid port assignment\n");
347 }
348
349 spin_unlock_irqrestore(&icom_lock, flags);
350 }
351
352 static void load_code(struct icom_port *icom_port)
353 {
354 const struct firmware *fw;
355 char __iomem *iram_ptr;
356 int index;
357 int status = 0;
358 void __iomem *dram_ptr = icom_port->dram;
359 dma_addr_t temp_pci;
360 unsigned char *new_page = NULL;
361 unsigned char cable_id = NO_CABLE;
362 struct pci_dev *dev = icom_port->adapter->pci_dev;
363
364 /* Clear out any pending interrupts */
365 writew(0x3FFF, icom_port->int_reg);
366
367 trace(icom_port, "CLEAR_INTERRUPTS", 0);
368
369 /* Stop processor */
370 stop_processor(icom_port);
371
372 /* Zero out DRAM */
373 memset_io(dram_ptr, 0, 512);
374
375 /* Load Call Setup into Adapter */
376 if (request_firmware(&fw, "icom_call_setup.bin", &dev->dev) < 0) {
377 dev_err(&dev->dev,"Unable to load icom_call_setup.bin firmware image\n");
378 status = -1;
379 goto load_code_exit;
380 }
381
382 if (fw->size > ICOM_DCE_IRAM_OFFSET) {
383 dev_err(&dev->dev, "Invalid firmware image for icom_call_setup.bin found.\n");
384 release_firmware(fw);
385 status = -1;
386 goto load_code_exit;
387 }
388
389 iram_ptr = (char __iomem *)icom_port->dram + ICOM_IRAM_OFFSET;
390 for (index = 0; index < fw->size; index++)
391 writeb(fw->data[index], &iram_ptr[index]);
392
393 release_firmware(fw);
394
395 /* Load Resident DCE portion of Adapter */
396 if (request_firmware(&fw, "icom_res_dce.bin", &dev->dev) < 0) {
397 dev_err(&dev->dev,"Unable to load icom_res_dce.bin firmware image\n");
398 status = -1;
399 goto load_code_exit;
400 }
401
402 if (fw->size > ICOM_IRAM_SIZE) {
403 dev_err(&dev->dev, "Invalid firmware image for icom_res_dce.bin found.\n");
404 release_firmware(fw);
405 status = -1;
406 goto load_code_exit;
407 }
408
409 iram_ptr = (char __iomem *) icom_port->dram + ICOM_IRAM_OFFSET;
410 for (index = ICOM_DCE_IRAM_OFFSET; index < fw->size; index++)
411 writeb(fw->data[index], &iram_ptr[index]);
412
413 release_firmware(fw);
414
415 /* Set Hardware level */
416 if (icom_port->adapter->version == ADAPTER_V2)
417 writeb(V2_HARDWARE, &(icom_port->dram->misc_flags));
418
419 /* Start the processor in Adapter */
420 start_processor(icom_port);
421
422 writeb((HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL),
423 &(icom_port->dram->HDLCConfigReg));
424 writeb(0x04, &(icom_port->dram->FlagFillIdleTimer)); /* 0.5 seconds */
425 writeb(0x00, &(icom_port->dram->CmdReg));
426 writeb(0x10, &(icom_port->dram->async_config3));
427 writeb((ICOM_ACFG_DRIVE1 | ICOM_ACFG_NO_PARITY | ICOM_ACFG_8BPC |
428 ICOM_ACFG_1STOP_BIT), &(icom_port->dram->async_config2));
429
430 /*Set up data in icom DRAM to indicate where personality
431 *code is located and its length.
432 */
433 new_page = pci_alloc_consistent(dev, 4096, &temp_pci);
434
435 if (!new_page) {
436 dev_err(&dev->dev, "Can not allocate DMA buffer\n");
437 status = -1;
438 goto load_code_exit;
439 }
440
441 if (request_firmware(&fw, "icom_asc.bin", &dev->dev) < 0) {
442 dev_err(&dev->dev,"Unable to load icom_asc.bin firmware image\n");
443 status = -1;
444 goto load_code_exit;
445 }
446
447 if (fw->size > ICOM_DCE_IRAM_OFFSET) {
448 dev_err(&dev->dev, "Invalid firmware image for icom_asc.bin found.\n");
449 release_firmware(fw);
450 status = -1;
451 goto load_code_exit;
452 }
453
454 for (index = 0; index < fw->size; index++)
455 new_page[index] = fw->data[index];
456
457 release_firmware(fw);
458
459 writeb((char) ((fw->size + 16)/16), &icom_port->dram->mac_length);
460 writel(temp_pci, &icom_port->dram->mac_load_addr);
461
462 /*Setting the syncReg to 0x80 causes adapter to start downloading
463 the personality code into adapter instruction RAM.
464 Once code is loaded, it will begin executing and, based on
465 information provided above, will start DMAing data from
466 shared memory to adapter DRAM.
467 */
468 /* the wait loop below verifies this write operation has been done
469 and processed
470 */
471 writeb(START_DOWNLOAD, &icom_port->dram->sync);
472
473 /* Wait max 1 Sec for data download and processor to start */
474 for (index = 0; index < 10; index++) {
475 msleep(100);
476 if (readb(&icom_port->dram->misc_flags) & ICOM_HDW_ACTIVE)
477 break;
478 }
479
480 if (index == 10)
481 status = -1;
482
483 /*
484 * check Cable ID
485 */
486 cable_id = readb(&icom_port->dram->cable_id);
487
488 if (cable_id & ICOM_CABLE_ID_VALID) {
489 /* Get cable ID into the lower 4 bits (standard form) */
490 cable_id = (cable_id & ICOM_CABLE_ID_MASK) >> 4;
491 icom_port->cable_id = cable_id;
492 } else {
493 dev_err(&dev->dev,"Invalid or no cable attached\n");
494 icom_port->cable_id = NO_CABLE;
495 }
496
497 load_code_exit:
498
499 if (status != 0) {
500 /* Clear out any pending interrupts */
501 writew(0x3FFF, icom_port->int_reg);
502
503 /* Turn off port */
504 writeb(ICOM_DISABLE, &(icom_port->dram->disable));
505
506 /* Stop processor */
507 stop_processor(icom_port);
508
509 dev_err(&icom_port->adapter->pci_dev->dev,"Port not opertional\n");
510 }
511
512 if (new_page != NULL)
513 pci_free_consistent(dev, 4096, new_page, temp_pci);
514 }
515
516 static int startup(struct icom_port *icom_port)
517 {
518 unsigned long temp;
519 unsigned char cable_id, raw_cable_id;
520 unsigned long flags;
521 int port;
522
523 trace(icom_port, "STARTUP", 0);
524
525 if (!icom_port->dram) {
526 /* should NEVER be NULL */
527 dev_err(&icom_port->adapter->pci_dev->dev,
528 "Unusable Port, port configuration missing\n");
529 return -ENODEV;
530 }
531
532 /*
533 * check Cable ID
534 */
535 raw_cable_id = readb(&icom_port->dram->cable_id);
536 trace(icom_port, "CABLE_ID", raw_cable_id);
537
538 /* Get cable ID into the lower 4 bits (standard form) */
539 cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4;
540
541 /* Check for valid Cable ID */
542 if (!(raw_cable_id & ICOM_CABLE_ID_VALID) ||
543 (cable_id != icom_port->cable_id)) {
544
545 /* reload adapter code, pick up any potential changes in cable id */
546 load_code(icom_port);
547
548 /* still no sign of cable, error out */
549 raw_cable_id = readb(&icom_port->dram->cable_id);
550 cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4;
551 if (!(raw_cable_id & ICOM_CABLE_ID_VALID) ||
552 (icom_port->cable_id == NO_CABLE))
553 return -EIO;
554 }
555
556 /*
557 * Finally, clear and enable interrupts
558 */
559 spin_lock_irqsave(&icom_lock, flags);
560 port = icom_port->port;
561 if (port == 0 || port == 1)
562 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask;
563 else
564 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2;
565
566 if (port == 0 || port == 2)
567 writew(0x00FF, icom_port->int_reg);
568 else
569 writew(0x3F00, icom_port->int_reg);
570 if (port < 4) {
571 temp = readl(int_mask_tbl[port].global_int_mask);
572 writel(temp & ~int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask);
573
574 /* write flush */
575 readl(int_mask_tbl[port].global_int_mask);
576 } else {
577 dev_err(&icom_port->adapter->pci_dev->dev,
578 "Invalid port assignment\n");
579 }
580
581 spin_unlock_irqrestore(&icom_lock, flags);
582 return 0;
583 }
584
585 static void shutdown(struct icom_port *icom_port)
586 {
587 unsigned long temp;
588 unsigned char cmdReg;
589 unsigned long flags;
590 int port;
591
592 spin_lock_irqsave(&icom_lock, flags);
593 trace(icom_port, "SHUTDOWN", 0);
594
595 /*
596 * disable all interrupts
597 */
598 port = icom_port->port;
599 if (port == 0 || port == 1)
600 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask;
601 else
602 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2;
603
604 if (port < 4) {
605 temp = readl(int_mask_tbl[port].global_int_mask);
606 writel(temp | int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask);
607
608 /* write flush */
609 readl(int_mask_tbl[port].global_int_mask);
610 } else {
611 dev_err(&icom_port->adapter->pci_dev->dev,
612 "Invalid port assignment\n");
613 }
614 spin_unlock_irqrestore(&icom_lock, flags);
615
616 /*
617 * disable break condition
618 */
619 cmdReg = readb(&icom_port->dram->CmdReg);
620 if (cmdReg & CMD_SND_BREAK) {
621 writeb(cmdReg & ~CMD_SND_BREAK, &icom_port->dram->CmdReg);
622 }
623 }
624
625 static int icom_write(struct uart_port *port)
626 {
627 unsigned long data_count;
628 unsigned char cmdReg;
629 unsigned long offset;
630 int temp_tail = port->state->xmit.tail;
631
632 trace(ICOM_PORT, "WRITE", 0);
633
634 if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) &
635 SA_FLAGS_READY_TO_XMIT) {
636 trace(ICOM_PORT, "WRITE_FULL", 0);
637 return 0;
638 }
639
640 data_count = 0;
641 while ((port->state->xmit.head != temp_tail) &&
642 (data_count <= XMIT_BUFF_SZ)) {
643
644 ICOM_PORT->xmit_buf[data_count++] =
645 port->state->xmit.buf[temp_tail];
646
647 temp_tail++;
648 temp_tail &= (UART_XMIT_SIZE - 1);
649 }
650
651 if (data_count) {
652 ICOM_PORT->statStg->xmit[0].flags =
653 cpu_to_le16(SA_FLAGS_READY_TO_XMIT);
654 ICOM_PORT->statStg->xmit[0].leLength =
655 cpu_to_le16(data_count);
656 offset =
657 (unsigned long) &ICOM_PORT->statStg->xmit[0] -
658 (unsigned long) ICOM_PORT->statStg;
659 *ICOM_PORT->xmitRestart =
660 cpu_to_le32(ICOM_PORT->statStg_pci + offset);
661 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
662 writeb(cmdReg | CMD_XMIT_RCV_ENABLE,
663 &ICOM_PORT->dram->CmdReg);
664 writeb(START_XMIT, &ICOM_PORT->dram->StartXmitCmd);
665 trace(ICOM_PORT, "WRITE_START", data_count);
666 /* write flush */
667 readb(&ICOM_PORT->dram->StartXmitCmd);
668 }
669
670 return data_count;
671 }
672
673 static inline void check_modem_status(struct icom_port *icom_port)
674 {
675 static char old_status = 0;
676 char delta_status;
677 unsigned char status;
678
679 spin_lock(&icom_port->uart_port.lock);
680
681 /*modem input register */
682 status = readb(&icom_port->dram->isr);
683 trace(icom_port, "CHECK_MODEM", status);
684 delta_status = status ^ old_status;
685 if (delta_status) {
686 if (delta_status & ICOM_RI)
687 icom_port->uart_port.icount.rng++;
688 if (delta_status & ICOM_DSR)
689 icom_port->uart_port.icount.dsr++;
690 if (delta_status & ICOM_DCD)
691 uart_handle_dcd_change(&icom_port->uart_port,
692 delta_status & ICOM_DCD);
693 if (delta_status & ICOM_CTS)
694 uart_handle_cts_change(&icom_port->uart_port,
695 delta_status & ICOM_CTS);
696
697 wake_up_interruptible(&icom_port->uart_port.state->
698 port.delta_msr_wait);
699 old_status = status;
700 }
701 spin_unlock(&icom_port->uart_port.lock);
702 }
703
704 static void xmit_interrupt(u16 port_int_reg, struct icom_port *icom_port)
705 {
706 unsigned short int count;
707 int i;
708
709 if (port_int_reg & (INT_XMIT_COMPLETED)) {
710 trace(icom_port, "XMIT_COMPLETE", 0);
711
712 /* clear buffer in use bit */
713 icom_port->statStg->xmit[0].flags &=
714 cpu_to_le16(~SA_FLAGS_READY_TO_XMIT);
715
716 count = (unsigned short int)
717 cpu_to_le16(icom_port->statStg->xmit[0].leLength);
718 icom_port->uart_port.icount.tx += count;
719
720 for (i=0; i<count &&
721 !uart_circ_empty(&icom_port->uart_port.state->xmit); i++) {
722
723 icom_port->uart_port.state->xmit.tail++;
724 icom_port->uart_port.state->xmit.tail &=
725 (UART_XMIT_SIZE - 1);
726 }
727
728 if (!icom_write(&icom_port->uart_port))
729 /* activate write queue */
730 uart_write_wakeup(&icom_port->uart_port);
731 } else
732 trace(icom_port, "XMIT_DISABLED", 0);
733 }
734
735 static void recv_interrupt(u16 port_int_reg, struct icom_port *icom_port)
736 {
737 short int count, rcv_buff;
738 struct tty_struct *tty = icom_port->uart_port.state->port.tty;
739 unsigned short int status;
740 struct uart_icount *icount;
741 unsigned long offset;
742 unsigned char flag;
743
744 trace(icom_port, "RCV_COMPLETE", 0);
745 rcv_buff = icom_port->next_rcv;
746
747 status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags);
748 while (status & SA_FL_RCV_DONE) {
749 int first = -1;
750
751 trace(icom_port, "FID_STATUS", status);
752 count = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].leLength);
753
754 trace(icom_port, "RCV_COUNT", count);
755
756 trace(icom_port, "REAL_COUNT", count);
757
758 offset =
759 cpu_to_le32(icom_port->statStg->rcv[rcv_buff].leBuffer) -
760 icom_port->recv_buf_pci;
761
762 /* Block copy all but the last byte as this may have status */
763 if (count > 0) {
764 first = icom_port->recv_buf[offset];
765 tty_insert_flip_string(tty, icom_port->recv_buf + offset, count - 1);
766 }
767
768 icount = &icom_port->uart_port.icount;
769 icount->rx += count;
770
771 /* Break detect logic */
772 if ((status & SA_FLAGS_FRAME_ERROR)
773 && first == 0) {
774 status &= ~SA_FLAGS_FRAME_ERROR;
775 status |= SA_FLAGS_BREAK_DET;
776 trace(icom_port, "BREAK_DET", 0);
777 }
778
779 flag = TTY_NORMAL;
780
781 if (status &
782 (SA_FLAGS_BREAK_DET | SA_FLAGS_PARITY_ERROR |
783 SA_FLAGS_FRAME_ERROR | SA_FLAGS_OVERRUN)) {
784
785 if (status & SA_FLAGS_BREAK_DET)
786 icount->brk++;
787 if (status & SA_FLAGS_PARITY_ERROR)
788 icount->parity++;
789 if (status & SA_FLAGS_FRAME_ERROR)
790 icount->frame++;
791 if (status & SA_FLAGS_OVERRUN)
792 icount->overrun++;
793
794 /*
795 * Now check to see if character should be
796 * ignored, and mask off conditions which
797 * should be ignored.
798 */
799 if (status & icom_port->ignore_status_mask) {
800 trace(icom_port, "IGNORE_CHAR", 0);
801 goto ignore_char;
802 }
803
804 status &= icom_port->read_status_mask;
805
806 if (status & SA_FLAGS_BREAK_DET) {
807 flag = TTY_BREAK;
808 } else if (status & SA_FLAGS_PARITY_ERROR) {
809 trace(icom_port, "PARITY_ERROR", 0);
810 flag = TTY_PARITY;
811 } else if (status & SA_FLAGS_FRAME_ERROR)
812 flag = TTY_FRAME;
813
814 }
815
816 tty_insert_flip_char(tty, *(icom_port->recv_buf + offset + count - 1), flag);
817
818 if (status & SA_FLAGS_OVERRUN)
819 /*
820 * Overrun is special, since it's
821 * reported immediately, and doesn't
822 * affect the current character
823 */
824 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
825 ignore_char:
826 icom_port->statStg->rcv[rcv_buff].flags = 0;
827 icom_port->statStg->rcv[rcv_buff].leLength = 0;
828 icom_port->statStg->rcv[rcv_buff].WorkingLength =
829 (unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
830
831 rcv_buff++;
832 if (rcv_buff == NUM_RBUFFS)
833 rcv_buff = 0;
834
835 status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags);
836 }
837 icom_port->next_rcv = rcv_buff;
838 tty_flip_buffer_push(tty);
839 }
840
841 static void process_interrupt(u16 port_int_reg,
842 struct icom_port *icom_port)
843 {
844
845 spin_lock(&icom_port->uart_port.lock);
846 trace(icom_port, "INTERRUPT", port_int_reg);
847
848 if (port_int_reg & (INT_XMIT_COMPLETED | INT_XMIT_DISABLED))
849 xmit_interrupt(port_int_reg, icom_port);
850
851 if (port_int_reg & INT_RCV_COMPLETED)
852 recv_interrupt(port_int_reg, icom_port);
853
854 spin_unlock(&icom_port->uart_port.lock);
855 }
856
857 static irqreturn_t icom_interrupt(int irq, void *dev_id)
858 {
859 void __iomem * int_reg;
860 u32 adapter_interrupts;
861 u16 port_int_reg;
862 struct icom_adapter *icom_adapter;
863 struct icom_port *icom_port;
864
865 /* find icom_port for this interrupt */
866 icom_adapter = (struct icom_adapter *) dev_id;
867
868 if (icom_adapter->version == ADAPTER_V2) {
869 int_reg = icom_adapter->base_addr + 0x8024;
870
871 adapter_interrupts = readl(int_reg);
872
873 if (adapter_interrupts & 0x00003FFF) {
874 /* port 2 interrupt, NOTE: for all ADAPTER_V2, port 2 will be active */
875 icom_port = &icom_adapter->port_info[2];
876 port_int_reg = (u16) adapter_interrupts;
877 process_interrupt(port_int_reg, icom_port);
878 check_modem_status(icom_port);
879 }
880 if (adapter_interrupts & 0x3FFF0000) {
881 /* port 3 interrupt */
882 icom_port = &icom_adapter->port_info[3];
883 if (icom_port->status == ICOM_PORT_ACTIVE) {
884 port_int_reg =
885 (u16) (adapter_interrupts >> 16);
886 process_interrupt(port_int_reg, icom_port);
887 check_modem_status(icom_port);
888 }
889 }
890
891 /* Clear out any pending interrupts */
892 writel(adapter_interrupts, int_reg);
893
894 int_reg = icom_adapter->base_addr + 0x8004;
895 } else {
896 int_reg = icom_adapter->base_addr + 0x4004;
897 }
898
899 adapter_interrupts = readl(int_reg);
900
901 if (adapter_interrupts & 0x00003FFF) {
902 /* port 0 interrupt, NOTE: for all adapters, port 0 will be active */
903 icom_port = &icom_adapter->port_info[0];
904 port_int_reg = (u16) adapter_interrupts;
905 process_interrupt(port_int_reg, icom_port);
906 check_modem_status(icom_port);
907 }
908 if (adapter_interrupts & 0x3FFF0000) {
909 /* port 1 interrupt */
910 icom_port = &icom_adapter->port_info[1];
911 if (icom_port->status == ICOM_PORT_ACTIVE) {
912 port_int_reg = (u16) (adapter_interrupts >> 16);
913 process_interrupt(port_int_reg, icom_port);
914 check_modem_status(icom_port);
915 }
916 }
917
918 /* Clear out any pending interrupts */
919 writel(adapter_interrupts, int_reg);
920
921 /* flush the write */
922 adapter_interrupts = readl(int_reg);
923
924 return IRQ_HANDLED;
925 }
926
927 /*
928 * ------------------------------------------------------------------
929 * Begin serial-core API
930 * ------------------------------------------------------------------
931 */
932 static unsigned int icom_tx_empty(struct uart_port *port)
933 {
934 int ret;
935 unsigned long flags;
936
937 spin_lock_irqsave(&port->lock, flags);
938 if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) &
939 SA_FLAGS_READY_TO_XMIT)
940 ret = TIOCSER_TEMT;
941 else
942 ret = 0;
943
944 spin_unlock_irqrestore(&port->lock, flags);
945 return ret;
946 }
947
948 static void icom_set_mctrl(struct uart_port *port, unsigned int mctrl)
949 {
950 unsigned char local_osr;
951
952 trace(ICOM_PORT, "SET_MODEM", 0);
953 local_osr = readb(&ICOM_PORT->dram->osr);
954
955 if (mctrl & TIOCM_RTS) {
956 trace(ICOM_PORT, "RAISE_RTS", 0);
957 local_osr |= ICOM_RTS;
958 } else {
959 trace(ICOM_PORT, "LOWER_RTS", 0);
960 local_osr &= ~ICOM_RTS;
961 }
962
963 if (mctrl & TIOCM_DTR) {
964 trace(ICOM_PORT, "RAISE_DTR", 0);
965 local_osr |= ICOM_DTR;
966 } else {
967 trace(ICOM_PORT, "LOWER_DTR", 0);
968 local_osr &= ~ICOM_DTR;
969 }
970
971 writeb(local_osr, &ICOM_PORT->dram->osr);
972 }
973
974 static unsigned int icom_get_mctrl(struct uart_port *port)
975 {
976 unsigned char status;
977 unsigned int result;
978
979 trace(ICOM_PORT, "GET_MODEM", 0);
980
981 status = readb(&ICOM_PORT->dram->isr);
982
983 result = ((status & ICOM_DCD) ? TIOCM_CAR : 0)
984 | ((status & ICOM_RI) ? TIOCM_RNG : 0)
985 | ((status & ICOM_DSR) ? TIOCM_DSR : 0)
986 | ((status & ICOM_CTS) ? TIOCM_CTS : 0);
987 return result;
988 }
989
990 static void icom_stop_tx(struct uart_port *port)
991 {
992 unsigned char cmdReg;
993
994 trace(ICOM_PORT, "STOP", 0);
995 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
996 writeb(cmdReg | CMD_HOLD_XMIT, &ICOM_PORT->dram->CmdReg);
997 }
998
999 static void icom_start_tx(struct uart_port *port)
1000 {
1001 unsigned char cmdReg;
1002
1003 trace(ICOM_PORT, "START", 0);
1004 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1005 if ((cmdReg & CMD_HOLD_XMIT) == CMD_HOLD_XMIT)
1006 writeb(cmdReg & ~CMD_HOLD_XMIT,
1007 &ICOM_PORT->dram->CmdReg);
1008
1009 icom_write(port);
1010 }
1011
1012 static void icom_send_xchar(struct uart_port *port, char ch)
1013 {
1014 unsigned char xdata;
1015 int index;
1016 unsigned long flags;
1017
1018 trace(ICOM_PORT, "SEND_XCHAR", ch);
1019
1020 /* wait .1 sec to send char */
1021 for (index = 0; index < 10; index++) {
1022 spin_lock_irqsave(&port->lock, flags);
1023 xdata = readb(&ICOM_PORT->dram->xchar);
1024 if (xdata == 0x00) {
1025 trace(ICOM_PORT, "QUICK_WRITE", 0);
1026 writeb(ch, &ICOM_PORT->dram->xchar);
1027
1028 /* flush write operation */
1029 xdata = readb(&ICOM_PORT->dram->xchar);
1030 spin_unlock_irqrestore(&port->lock, flags);
1031 break;
1032 }
1033 spin_unlock_irqrestore(&port->lock, flags);
1034 msleep(10);
1035 }
1036 }
1037
1038 static void icom_stop_rx(struct uart_port *port)
1039 {
1040 unsigned char cmdReg;
1041
1042 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1043 writeb(cmdReg & ~CMD_RCV_ENABLE, &ICOM_PORT->dram->CmdReg);
1044 }
1045
1046 static void icom_enable_ms(struct uart_port *port)
1047 {
1048 /* no-op */
1049 }
1050
1051 static void icom_break(struct uart_port *port, int break_state)
1052 {
1053 unsigned char cmdReg;
1054 unsigned long flags;
1055
1056 spin_lock_irqsave(&port->lock, flags);
1057 trace(ICOM_PORT, "BREAK", 0);
1058 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1059 if (break_state == -1) {
1060 writeb(cmdReg | CMD_SND_BREAK, &ICOM_PORT->dram->CmdReg);
1061 } else {
1062 writeb(cmdReg & ~CMD_SND_BREAK, &ICOM_PORT->dram->CmdReg);
1063 }
1064 spin_unlock_irqrestore(&port->lock, flags);
1065 }
1066
1067 static int icom_open(struct uart_port *port)
1068 {
1069 int retval;
1070
1071 kref_get(&ICOM_PORT->adapter->kref);
1072 retval = startup(ICOM_PORT);
1073
1074 if (retval) {
1075 kref_put(&ICOM_PORT->adapter->kref, icom_kref_release);
1076 trace(ICOM_PORT, "STARTUP_ERROR", 0);
1077 return retval;
1078 }
1079
1080 return 0;
1081 }
1082
1083 static void icom_close(struct uart_port *port)
1084 {
1085 unsigned char cmdReg;
1086
1087 trace(ICOM_PORT, "CLOSE", 0);
1088
1089 /* stop receiver */
1090 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1091 writeb(cmdReg & (unsigned char) ~CMD_RCV_ENABLE,
1092 &ICOM_PORT->dram->CmdReg);
1093
1094 shutdown(ICOM_PORT);
1095
1096 kref_put(&ICOM_PORT->adapter->kref, icom_kref_release);
1097 }
1098
1099 static void icom_set_termios(struct uart_port *port,
1100 struct ktermios *termios,
1101 struct ktermios *old_termios)
1102 {
1103 int baud;
1104 unsigned cflag, iflag;
1105 char new_config2;
1106 char new_config3 = 0;
1107 char tmp_byte;
1108 int index;
1109 int rcv_buff, xmit_buff;
1110 unsigned long offset;
1111 unsigned long flags;
1112
1113 spin_lock_irqsave(&port->lock, flags);
1114 trace(ICOM_PORT, "CHANGE_SPEED", 0);
1115
1116 cflag = termios->c_cflag;
1117 iflag = termios->c_iflag;
1118
1119 new_config2 = ICOM_ACFG_DRIVE1;
1120
1121 /* byte size and parity */
1122 switch (cflag & CSIZE) {
1123 case CS5: /* 5 bits/char */
1124 new_config2 |= ICOM_ACFG_5BPC;
1125 break;
1126 case CS6: /* 6 bits/char */
1127 new_config2 |= ICOM_ACFG_6BPC;
1128 break;
1129 case CS7: /* 7 bits/char */
1130 new_config2 |= ICOM_ACFG_7BPC;
1131 break;
1132 case CS8: /* 8 bits/char */
1133 new_config2 |= ICOM_ACFG_8BPC;
1134 break;
1135 default:
1136 break;
1137 }
1138 if (cflag & CSTOPB) {
1139 /* 2 stop bits */
1140 new_config2 |= ICOM_ACFG_2STOP_BIT;
1141 }
1142 if (cflag & PARENB) {
1143 /* parity bit enabled */
1144 new_config2 |= ICOM_ACFG_PARITY_ENAB;
1145 trace(ICOM_PORT, "PARENB", 0);
1146 }
1147 if (cflag & PARODD) {
1148 /* odd parity */
1149 new_config2 |= ICOM_ACFG_PARITY_ODD;
1150 trace(ICOM_PORT, "PARODD", 0);
1151 }
1152
1153 /* Determine divisor based on baud rate */
1154 baud = uart_get_baud_rate(port, termios, old_termios,
1155 icom_acfg_baud[0],
1156 icom_acfg_baud[BAUD_TABLE_LIMIT]);
1157 if (!baud)
1158 baud = 9600; /* B0 transition handled in rs_set_termios */
1159
1160 for (index = 0; index < BAUD_TABLE_LIMIT; index++) {
1161 if (icom_acfg_baud[index] == baud) {
1162 new_config3 = index;
1163 break;
1164 }
1165 }
1166
1167 uart_update_timeout(port, cflag, baud);
1168
1169 /* CTS flow control flag and modem status interrupts */
1170 tmp_byte = readb(&(ICOM_PORT->dram->HDLCConfigReg));
1171 if (cflag & CRTSCTS)
1172 tmp_byte |= HDLC_HDW_FLOW;
1173 else
1174 tmp_byte &= ~HDLC_HDW_FLOW;
1175 writeb(tmp_byte, &(ICOM_PORT->dram->HDLCConfigReg));
1176
1177 /*
1178 * Set up parity check flag
1179 */
1180 ICOM_PORT->read_status_mask = SA_FLAGS_OVERRUN | SA_FL_RCV_DONE;
1181 if (iflag & INPCK)
1182 ICOM_PORT->read_status_mask |=
1183 SA_FLAGS_FRAME_ERROR | SA_FLAGS_PARITY_ERROR;
1184
1185 if ((iflag & BRKINT) || (iflag & PARMRK))
1186 ICOM_PORT->read_status_mask |= SA_FLAGS_BREAK_DET;
1187
1188 /*
1189 * Characters to ignore
1190 */
1191 ICOM_PORT->ignore_status_mask = 0;
1192 if (iflag & IGNPAR)
1193 ICOM_PORT->ignore_status_mask |=
1194 SA_FLAGS_PARITY_ERROR | SA_FLAGS_FRAME_ERROR;
1195 if (iflag & IGNBRK) {
1196 ICOM_PORT->ignore_status_mask |= SA_FLAGS_BREAK_DET;
1197 /*
1198 * If we're ignore parity and break indicators, ignore
1199 * overruns too. (For real raw support).
1200 */
1201 if (iflag & IGNPAR)
1202 ICOM_PORT->ignore_status_mask |= SA_FLAGS_OVERRUN;
1203 }
1204
1205 /*
1206 * !!! ignore all characters if CREAD is not set
1207 */
1208 if ((cflag & CREAD) == 0)
1209 ICOM_PORT->ignore_status_mask |= SA_FL_RCV_DONE;
1210
1211 /* Turn off Receiver to prepare for reset */
1212 writeb(CMD_RCV_DISABLE, &ICOM_PORT->dram->CmdReg);
1213
1214 for (index = 0; index < 10; index++) {
1215 if (readb(&ICOM_PORT->dram->PrevCmdReg) == 0x00) {
1216 break;
1217 }
1218 }
1219
1220 /* clear all current buffers of data */
1221 for (rcv_buff = 0; rcv_buff < NUM_RBUFFS; rcv_buff++) {
1222 ICOM_PORT->statStg->rcv[rcv_buff].flags = 0;
1223 ICOM_PORT->statStg->rcv[rcv_buff].leLength = 0;
1224 ICOM_PORT->statStg->rcv[rcv_buff].WorkingLength =
1225 (unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
1226 }
1227
1228 for (xmit_buff = 0; xmit_buff < NUM_XBUFFS; xmit_buff++) {
1229 ICOM_PORT->statStg->xmit[xmit_buff].flags = 0;
1230 }
1231
1232 /* activate changes and start xmit and receiver here */
1233 /* Enable the receiver */
1234 writeb(new_config3, &(ICOM_PORT->dram->async_config3));
1235 writeb(new_config2, &(ICOM_PORT->dram->async_config2));
1236 tmp_byte = readb(&(ICOM_PORT->dram->HDLCConfigReg));
1237 tmp_byte |= HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL;
1238 writeb(tmp_byte, &(ICOM_PORT->dram->HDLCConfigReg));
1239 writeb(0x04, &(ICOM_PORT->dram->FlagFillIdleTimer)); /* 0.5 seconds */
1240 writeb(0xFF, &(ICOM_PORT->dram->ier)); /* enable modem signal interrupts */
1241
1242 /* reset processor */
1243 writeb(CMD_RESTART, &ICOM_PORT->dram->CmdReg);
1244
1245 for (index = 0; index < 10; index++) {
1246 if (readb(&ICOM_PORT->dram->CmdReg) == 0x00) {
1247 break;
1248 }
1249 }
1250
1251 /* Enable Transmitter and Reciever */
1252 offset =
1253 (unsigned long) &ICOM_PORT->statStg->rcv[0] -
1254 (unsigned long) ICOM_PORT->statStg;
1255 writel(ICOM_PORT->statStg_pci + offset,
1256 &ICOM_PORT->dram->RcvStatusAddr);
1257 ICOM_PORT->next_rcv = 0;
1258 ICOM_PORT->put_length = 0;
1259 *ICOM_PORT->xmitRestart = 0;
1260 writel(ICOM_PORT->xmitRestart_pci,
1261 &ICOM_PORT->dram->XmitStatusAddr);
1262 trace(ICOM_PORT, "XR_ENAB", 0);
1263 writeb(CMD_XMIT_RCV_ENABLE, &ICOM_PORT->dram->CmdReg);
1264
1265 spin_unlock_irqrestore(&port->lock, flags);
1266 }
1267
1268 static const char *icom_type(struct uart_port *port)
1269 {
1270 return "icom";
1271 }
1272
1273 static void icom_release_port(struct uart_port *port)
1274 {
1275 }
1276
1277 static int icom_request_port(struct uart_port *port)
1278 {
1279 return 0;
1280 }
1281
1282 static void icom_config_port(struct uart_port *port, int flags)
1283 {
1284 port->type = PORT_ICOM;
1285 }
1286
1287 static struct uart_ops icom_ops = {
1288 .tx_empty = icom_tx_empty,
1289 .set_mctrl = icom_set_mctrl,
1290 .get_mctrl = icom_get_mctrl,
1291 .stop_tx = icom_stop_tx,
1292 .start_tx = icom_start_tx,
1293 .send_xchar = icom_send_xchar,
1294 .stop_rx = icom_stop_rx,
1295 .enable_ms = icom_enable_ms,
1296 .break_ctl = icom_break,
1297 .startup = icom_open,
1298 .shutdown = icom_close,
1299 .set_termios = icom_set_termios,
1300 .type = icom_type,
1301 .release_port = icom_release_port,
1302 .request_port = icom_request_port,
1303 .config_port = icom_config_port,
1304 };
1305
1306 #define ICOM_CONSOLE NULL
1307
1308 static struct uart_driver icom_uart_driver = {
1309 .owner = THIS_MODULE,
1310 .driver_name = ICOM_DRIVER_NAME,
1311 .dev_name = "ttyA",
1312 .major = ICOM_MAJOR,
1313 .minor = ICOM_MINOR_START,
1314 .nr = NR_PORTS,
1315 .cons = ICOM_CONSOLE,
1316 };
1317
1318 static int __devinit icom_init_ports(struct icom_adapter *icom_adapter)
1319 {
1320 u32 subsystem_id = icom_adapter->subsystem_id;
1321 int i;
1322 struct icom_port *icom_port;
1323
1324 if (icom_adapter->version == ADAPTER_V1) {
1325 icom_adapter->numb_ports = 2;
1326
1327 for (i = 0; i < 2; i++) {
1328 icom_port = &icom_adapter->port_info[i];
1329 icom_port->port = i;
1330 icom_port->status = ICOM_PORT_ACTIVE;
1331 icom_port->imbed_modem = ICOM_UNKNOWN;
1332 }
1333 } else {
1334 if (subsystem_id == PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL) {
1335 icom_adapter->numb_ports = 4;
1336
1337 for (i = 0; i < 4; i++) {
1338 icom_port = &icom_adapter->port_info[i];
1339
1340 icom_port->port = i;
1341 icom_port->status = ICOM_PORT_ACTIVE;
1342 icom_port->imbed_modem = ICOM_IMBED_MODEM;
1343 }
1344 } else {
1345 icom_adapter->numb_ports = 4;
1346
1347 icom_adapter->port_info[0].port = 0;
1348 icom_adapter->port_info[0].status = ICOM_PORT_ACTIVE;
1349
1350 if (subsystem_id ==
1351 PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM) {
1352 icom_adapter->port_info[0].imbed_modem = ICOM_IMBED_MODEM;
1353 } else {
1354 icom_adapter->port_info[0].imbed_modem = ICOM_RVX;
1355 }
1356
1357 icom_adapter->port_info[1].status = ICOM_PORT_OFF;
1358
1359 icom_adapter->port_info[2].port = 2;
1360 icom_adapter->port_info[2].status = ICOM_PORT_ACTIVE;
1361 icom_adapter->port_info[2].imbed_modem = ICOM_RVX;
1362 icom_adapter->port_info[3].status = ICOM_PORT_OFF;
1363 }
1364 }
1365
1366 return 0;
1367 }
1368
1369 static void icom_port_active(struct icom_port *icom_port, struct icom_adapter *icom_adapter, int port_num)
1370 {
1371 if (icom_adapter->version == ADAPTER_V1) {
1372 icom_port->global_reg = icom_adapter->base_addr + 0x4000;
1373 icom_port->int_reg = icom_adapter->base_addr +
1374 0x4004 + 2 - 2 * port_num;
1375 } else {
1376 icom_port->global_reg = icom_adapter->base_addr + 0x8000;
1377 if (icom_port->port < 2)
1378 icom_port->int_reg = icom_adapter->base_addr +
1379 0x8004 + 2 - 2 * icom_port->port;
1380 else
1381 icom_port->int_reg = icom_adapter->base_addr +
1382 0x8024 + 2 - 2 * (icom_port->port - 2);
1383 }
1384 }
1385 static int __devinit icom_load_ports(struct icom_adapter *icom_adapter)
1386 {
1387 struct icom_port *icom_port;
1388 int port_num;
1389
1390 for (port_num = 0; port_num < icom_adapter->numb_ports; port_num++) {
1391
1392 icom_port = &icom_adapter->port_info[port_num];
1393
1394 if (icom_port->status == ICOM_PORT_ACTIVE) {
1395 icom_port_active(icom_port, icom_adapter, port_num);
1396 icom_port->dram = icom_adapter->base_addr +
1397 0x2000 * icom_port->port;
1398
1399 icom_port->adapter = icom_adapter;
1400
1401 /* get port memory */
1402 if (get_port_memory(icom_port) != 0) {
1403 dev_err(&icom_port->adapter->pci_dev->dev,
1404 "Memory allocation for port FAILED\n");
1405 }
1406 }
1407 }
1408 return 0;
1409 }
1410
1411 static int __devinit icom_alloc_adapter(struct icom_adapter
1412 **icom_adapter_ref)
1413 {
1414 int adapter_count = 0;
1415 struct icom_adapter *icom_adapter;
1416 struct icom_adapter *cur_adapter_entry;
1417 struct list_head *tmp;
1418
1419 icom_adapter = (struct icom_adapter *)
1420 kzalloc(sizeof(struct icom_adapter), GFP_KERNEL);
1421
1422 if (!icom_adapter) {
1423 return -ENOMEM;
1424 }
1425
1426 list_for_each(tmp, &icom_adapter_head) {
1427 cur_adapter_entry =
1428 list_entry(tmp, struct icom_adapter,
1429 icom_adapter_entry);
1430 if (cur_adapter_entry->index != adapter_count) {
1431 break;
1432 }
1433 adapter_count++;
1434 }
1435
1436 icom_adapter->index = adapter_count;
1437 list_add_tail(&icom_adapter->icom_adapter_entry, tmp);
1438
1439 *icom_adapter_ref = icom_adapter;
1440 return 0;
1441 }
1442
1443 static void icom_free_adapter(struct icom_adapter *icom_adapter)
1444 {
1445 list_del(&icom_adapter->icom_adapter_entry);
1446 kfree(icom_adapter);
1447 }
1448
1449 static void icom_remove_adapter(struct icom_adapter *icom_adapter)
1450 {
1451 struct icom_port *icom_port;
1452 int index;
1453
1454 for (index = 0; index < icom_adapter->numb_ports; index++) {
1455 icom_port = &icom_adapter->port_info[index];
1456
1457 if (icom_port->status == ICOM_PORT_ACTIVE) {
1458 dev_info(&icom_adapter->pci_dev->dev,
1459 "Device removed\n");
1460
1461 uart_remove_one_port(&icom_uart_driver,
1462 &icom_port->uart_port);
1463
1464 /* be sure that DTR and RTS are dropped */
1465 writeb(0x00, &icom_port->dram->osr);
1466
1467 /* Wait 0.1 Sec for simple Init to complete */
1468 msleep(100);
1469
1470 /* Stop proccessor */
1471 stop_processor(icom_port);
1472
1473 free_port_memory(icom_port);
1474 }
1475 }
1476
1477 free_irq(icom_adapter->pci_dev->irq, (void *) icom_adapter);
1478 iounmap(icom_adapter->base_addr);
1479 pci_release_regions(icom_adapter->pci_dev);
1480 icom_free_adapter(icom_adapter);
1481 }
1482
1483 static void icom_kref_release(struct kref *kref)
1484 {
1485 struct icom_adapter *icom_adapter;
1486
1487 icom_adapter = to_icom_adapter(kref);
1488 icom_remove_adapter(icom_adapter);
1489 }
1490
1491 static int __devinit icom_probe(struct pci_dev *dev,
1492 const struct pci_device_id *ent)
1493 {
1494 int index;
1495 unsigned int command_reg;
1496 int retval;
1497 struct icom_adapter *icom_adapter;
1498 struct icom_port *icom_port;
1499
1500 retval = pci_enable_device(dev);
1501 if (retval) {
1502 dev_err(&dev->dev, "Device enable FAILED\n");
1503 return retval;
1504 }
1505
1506 if ( (retval = pci_request_regions(dev, "icom"))) {
1507 dev_err(&dev->dev, "pci_request_regions FAILED\n");
1508 pci_disable_device(dev);
1509 return retval;
1510 }
1511
1512 pci_set_master(dev);
1513
1514 if ( (retval = pci_read_config_dword(dev, PCI_COMMAND, &command_reg))) {
1515 dev_err(&dev->dev, "PCI Config read FAILED\n");
1516 return retval;
1517 }
1518
1519 pci_write_config_dword(dev, PCI_COMMAND,
1520 command_reg | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
1521 | PCI_COMMAND_PARITY | PCI_COMMAND_SERR);
1522
1523 if (ent->driver_data == ADAPTER_V1) {
1524 pci_write_config_dword(dev, 0x44, 0x8300830A);
1525 } else {
1526 pci_write_config_dword(dev, 0x44, 0x42004200);
1527 pci_write_config_dword(dev, 0x48, 0x42004200);
1528 }
1529
1530
1531 retval = icom_alloc_adapter(&icom_adapter);
1532 if (retval) {
1533 dev_err(&dev->dev, "icom_alloc_adapter FAILED\n");
1534 retval = -EIO;
1535 goto probe_exit0;
1536 }
1537
1538 icom_adapter->base_addr_pci = pci_resource_start(dev, 0);
1539 icom_adapter->pci_dev = dev;
1540 icom_adapter->version = ent->driver_data;
1541 icom_adapter->subsystem_id = ent->subdevice;
1542
1543
1544 retval = icom_init_ports(icom_adapter);
1545 if (retval) {
1546 dev_err(&dev->dev, "Port configuration failed\n");
1547 goto probe_exit1;
1548 }
1549
1550 icom_adapter->base_addr = pci_ioremap_bar(dev, 0);
1551
1552 if (!icom_adapter->base_addr)
1553 goto probe_exit1;
1554
1555 /* save off irq and request irq line */
1556 if ( (retval = request_irq(dev->irq, icom_interrupt,
1557 IRQF_DISABLED | IRQF_SHARED, ICOM_DRIVER_NAME,
1558 (void *) icom_adapter))) {
1559 goto probe_exit2;
1560 }
1561
1562 retval = icom_load_ports(icom_adapter);
1563
1564 for (index = 0; index < icom_adapter->numb_ports; index++) {
1565 icom_port = &icom_adapter->port_info[index];
1566
1567 if (icom_port->status == ICOM_PORT_ACTIVE) {
1568 icom_port->uart_port.irq = icom_port->adapter->pci_dev->irq;
1569 icom_port->uart_port.type = PORT_ICOM;
1570 icom_port->uart_port.iotype = UPIO_MEM;
1571 icom_port->uart_port.membase =
1572 (char *) icom_adapter->base_addr_pci;
1573 icom_port->uart_port.fifosize = 16;
1574 icom_port->uart_port.ops = &icom_ops;
1575 icom_port->uart_port.line =
1576 icom_port->port + icom_adapter->index * 4;
1577 if (uart_add_one_port (&icom_uart_driver, &icom_port->uart_port)) {
1578 icom_port->status = ICOM_PORT_OFF;
1579 dev_err(&dev->dev, "Device add failed\n");
1580 } else
1581 dev_info(&dev->dev, "Device added\n");
1582 }
1583 }
1584
1585 kref_init(&icom_adapter->kref);
1586 return 0;
1587
1588 probe_exit2:
1589 iounmap(icom_adapter->base_addr);
1590 probe_exit1:
1591 icom_free_adapter(icom_adapter);
1592
1593 probe_exit0:
1594 pci_release_regions(dev);
1595 pci_disable_device(dev);
1596
1597 return retval;
1598 }
1599
1600 static void __devexit icom_remove(struct pci_dev *dev)
1601 {
1602 struct icom_adapter *icom_adapter;
1603 struct list_head *tmp;
1604
1605 list_for_each(tmp, &icom_adapter_head) {
1606 icom_adapter = list_entry(tmp, struct icom_adapter,
1607 icom_adapter_entry);
1608 if (icom_adapter->pci_dev == dev) {
1609 kref_put(&icom_adapter->kref, icom_kref_release);
1610 return;
1611 }
1612 }
1613
1614 dev_err(&dev->dev, "Unable to find device to remove\n");
1615 }
1616
1617 static struct pci_driver icom_pci_driver = {
1618 .name = ICOM_DRIVER_NAME,
1619 .id_table = icom_pci_table,
1620 .probe = icom_probe,
1621 .remove = __devexit_p(icom_remove),
1622 };
1623
1624 static int __init icom_init(void)
1625 {
1626 int ret;
1627
1628 spin_lock_init(&icom_lock);
1629
1630 ret = uart_register_driver(&icom_uart_driver);
1631 if (ret)
1632 return ret;
1633
1634 ret = pci_register_driver(&icom_pci_driver);
1635
1636 if (ret < 0)
1637 uart_unregister_driver(&icom_uart_driver);
1638
1639 return ret;
1640 }
1641
1642 static void __exit icom_exit(void)
1643 {
1644 pci_unregister_driver(&icom_pci_driver);
1645 uart_unregister_driver(&icom_uart_driver);
1646 }
1647
1648 module_init(icom_init);
1649 module_exit(icom_exit);
1650
1651 MODULE_AUTHOR("Michael Anderson <mjanders@us.ibm.com>");
1652 MODULE_DESCRIPTION("IBM iSeries Serial IOA driver");
1653 MODULE_SUPPORTED_DEVICE
1654 ("IBM iSeries 2745, 2771, 2772, 2742, 2793 and 2805 Communications adapters");
1655 MODULE_LICENSE("GPL");
1656 MODULE_FIRMWARE("icom_call_setup.bin");
1657 MODULE_FIRMWARE("icom_res_dce.bin");
1658 MODULE_FIRMWARE("icom_asc.bin");