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Fix gcc 4.5.1 miscompiling drivers/char/i8k.c (again)
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / serial / icom.c
blob0028b6f89ce6aa7b48755e19c092e14b182da96e
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 count = tty_buffer_request_room(tty, count);
755 trace(icom_port, "RCV_COUNT", count);
756
757 trace(icom_port, "REAL_COUNT", count);
758
759 offset =
760 cpu_to_le32(icom_port->statStg->rcv[rcv_buff].leBuffer) -
761 icom_port->recv_buf_pci;
762
763 /* Block copy all but the last byte as this may have status */
764 if (count > 0) {
765 first = icom_port->recv_buf[offset];
766 tty_insert_flip_string(tty, icom_port->recv_buf + offset, count - 1);
767 }
768
769 icount = &icom_port->uart_port.icount;
770 icount->rx += count;
771
772 /* Break detect logic */
773 if ((status & SA_FLAGS_FRAME_ERROR)
774 && first == 0) {
775 status &= ~SA_FLAGS_FRAME_ERROR;
776 status |= SA_FLAGS_BREAK_DET;
777 trace(icom_port, "BREAK_DET", 0);
778 }
779
780 flag = TTY_NORMAL;
781
782 if (status &
783 (SA_FLAGS_BREAK_DET | SA_FLAGS_PARITY_ERROR |
784 SA_FLAGS_FRAME_ERROR | SA_FLAGS_OVERRUN)) {
785
786 if (status & SA_FLAGS_BREAK_DET)
787 icount->brk++;
788 if (status & SA_FLAGS_PARITY_ERROR)
789 icount->parity++;
790 if (status & SA_FLAGS_FRAME_ERROR)
791 icount->frame++;
792 if (status & SA_FLAGS_OVERRUN)
793 icount->overrun++;
794
795 /*
796 * Now check to see if character should be
797 * ignored, and mask off conditions which
798 * should be ignored.
799 */
800 if (status & icom_port->ignore_status_mask) {
801 trace(icom_port, "IGNORE_CHAR", 0);
802 goto ignore_char;
803 }
804
805 status &= icom_port->read_status_mask;
806
807 if (status & SA_FLAGS_BREAK_DET) {
808 flag = TTY_BREAK;
809 } else if (status & SA_FLAGS_PARITY_ERROR) {
810 trace(icom_port, "PARITY_ERROR", 0);
811 flag = TTY_PARITY;
812 } else if (status & SA_FLAGS_FRAME_ERROR)
813 flag = TTY_FRAME;
814
815 }
816
817 tty_insert_flip_char(tty, *(icom_port->recv_buf + offset + count - 1), flag);
818
819 if (status & SA_FLAGS_OVERRUN)
820 /*
821 * Overrun is special, since it's
822 * reported immediately, and doesn't
823 * affect the current character
824 */
825 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
826 ignore_char:
827 icom_port->statStg->rcv[rcv_buff].flags = 0;
828 icom_port->statStg->rcv[rcv_buff].leLength = 0;
829 icom_port->statStg->rcv[rcv_buff].WorkingLength =
830 (unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
831
832 rcv_buff++;
833 if (rcv_buff == NUM_RBUFFS)
834 rcv_buff = 0;
835
836 status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags);
837 }
838 icom_port->next_rcv = rcv_buff;
839 tty_flip_buffer_push(tty);
840 }
841
842 static void process_interrupt(u16 port_int_reg,
843 struct icom_port *icom_port)
844 {
845
846 spin_lock(&icom_port->uart_port.lock);
847 trace(icom_port, "INTERRUPT", port_int_reg);
848
849 if (port_int_reg & (INT_XMIT_COMPLETED | INT_XMIT_DISABLED))
850 xmit_interrupt(port_int_reg, icom_port);
851
852 if (port_int_reg & INT_RCV_COMPLETED)
853 recv_interrupt(port_int_reg, icom_port);
854
855 spin_unlock(&icom_port->uart_port.lock);
856 }
857
858 static irqreturn_t icom_interrupt(int irq, void *dev_id)
859 {
860 void __iomem * int_reg;
861 u32 adapter_interrupts;
862 u16 port_int_reg;
863 struct icom_adapter *icom_adapter;
864 struct icom_port *icom_port;
865
866 /* find icom_port for this interrupt */
867 icom_adapter = (struct icom_adapter *) dev_id;
868
869 if (icom_adapter->version == ADAPTER_V2) {
870 int_reg = icom_adapter->base_addr + 0x8024;
871
872 adapter_interrupts = readl(int_reg);
873
874 if (adapter_interrupts & 0x00003FFF) {
875 /* port 2 interrupt, NOTE: for all ADAPTER_V2, port 2 will be active */
876 icom_port = &icom_adapter->port_info[2];
877 port_int_reg = (u16) adapter_interrupts;
878 process_interrupt(port_int_reg, icom_port);
879 check_modem_status(icom_port);
880 }
881 if (adapter_interrupts & 0x3FFF0000) {
882 /* port 3 interrupt */
883 icom_port = &icom_adapter->port_info[3];
884 if (icom_port->status == ICOM_PORT_ACTIVE) {
885 port_int_reg =
886 (u16) (adapter_interrupts >> 16);
887 process_interrupt(port_int_reg, icom_port);
888 check_modem_status(icom_port);
889 }
890 }
891
892 /* Clear out any pending interrupts */
893 writel(adapter_interrupts, int_reg);
894
895 int_reg = icom_adapter->base_addr + 0x8004;
896 } else {
897 int_reg = icom_adapter->base_addr + 0x4004;
898 }
899
900 adapter_interrupts = readl(int_reg);
901
902 if (adapter_interrupts & 0x00003FFF) {
903 /* port 0 interrupt, NOTE: for all adapters, port 0 will be active */
904 icom_port = &icom_adapter->port_info[0];
905 port_int_reg = (u16) adapter_interrupts;
906 process_interrupt(port_int_reg, icom_port);
907 check_modem_status(icom_port);
908 }
909 if (adapter_interrupts & 0x3FFF0000) {
910 /* port 1 interrupt */
911 icom_port = &icom_adapter->port_info[1];
912 if (icom_port->status == ICOM_PORT_ACTIVE) {
913 port_int_reg = (u16) (adapter_interrupts >> 16);
914 process_interrupt(port_int_reg, icom_port);
915 check_modem_status(icom_port);
916 }
917 }
918
919 /* Clear out any pending interrupts */
920 writel(adapter_interrupts, int_reg);
921
922 /* flush the write */
923 adapter_interrupts = readl(int_reg);
924
925 return IRQ_HANDLED;
926 }
927
928 /*
929 * ------------------------------------------------------------------
930 * Begin serial-core API
931 * ------------------------------------------------------------------
932 */
933 static unsigned int icom_tx_empty(struct uart_port *port)
934 {
935 int ret;
936 unsigned long flags;
937
938 spin_lock_irqsave(&port->lock, flags);
939 if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) &
940 SA_FLAGS_READY_TO_XMIT)
941 ret = TIOCSER_TEMT;
942 else
943 ret = 0;
944
945 spin_unlock_irqrestore(&port->lock, flags);
946 return ret;
947 }
948
949 static void icom_set_mctrl(struct uart_port *port, unsigned int mctrl)
950 {
951 unsigned char local_osr;
952
953 trace(ICOM_PORT, "SET_MODEM", 0);
954 local_osr = readb(&ICOM_PORT->dram->osr);
955
956 if (mctrl & TIOCM_RTS) {
957 trace(ICOM_PORT, "RAISE_RTS", 0);
958 local_osr |= ICOM_RTS;
959 } else {
960 trace(ICOM_PORT, "LOWER_RTS", 0);
961 local_osr &= ~ICOM_RTS;
962 }
963
964 if (mctrl & TIOCM_DTR) {
965 trace(ICOM_PORT, "RAISE_DTR", 0);
966 local_osr |= ICOM_DTR;
967 } else {
968 trace(ICOM_PORT, "LOWER_DTR", 0);
969 local_osr &= ~ICOM_DTR;
970 }
971
972 writeb(local_osr, &ICOM_PORT->dram->osr);
973 }
974
975 static unsigned int icom_get_mctrl(struct uart_port *port)
976 {
977 unsigned char status;
978 unsigned int result;
979
980 trace(ICOM_PORT, "GET_MODEM", 0);
981
982 status = readb(&ICOM_PORT->dram->isr);
983
984 result = ((status & ICOM_DCD) ? TIOCM_CAR : 0)
985 | ((status & ICOM_RI) ? TIOCM_RNG : 0)
986 | ((status & ICOM_DSR) ? TIOCM_DSR : 0)
987 | ((status & ICOM_CTS) ? TIOCM_CTS : 0);
988 return result;
989 }
990
991 static void icom_stop_tx(struct uart_port *port)
992 {
993 unsigned char cmdReg;
994
995 trace(ICOM_PORT, "STOP", 0);
996 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
997 writeb(cmdReg | CMD_HOLD_XMIT, &ICOM_PORT->dram->CmdReg);
998 }
999
1000 static void icom_start_tx(struct uart_port *port)
1001 {
1002 unsigned char cmdReg;
1003
1004 trace(ICOM_PORT, "START", 0);
1005 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1006 if ((cmdReg & CMD_HOLD_XMIT) == CMD_HOLD_XMIT)
1007 writeb(cmdReg & ~CMD_HOLD_XMIT,
1008 &ICOM_PORT->dram->CmdReg);
1009
1010 icom_write(port);
1011 }
1012
1013 static void icom_send_xchar(struct uart_port *port, char ch)
1014 {
1015 unsigned char xdata;
1016 int index;
1017 unsigned long flags;
1018
1019 trace(ICOM_PORT, "SEND_XCHAR", ch);
1020
1021 /* wait .1 sec to send char */
1022 for (index = 0; index < 10; index++) {
1023 spin_lock_irqsave(&port->lock, flags);
1024 xdata = readb(&ICOM_PORT->dram->xchar);
1025 if (xdata == 0x00) {
1026 trace(ICOM_PORT, "QUICK_WRITE", 0);
1027 writeb(ch, &ICOM_PORT->dram->xchar);
1028
1029 /* flush write operation */
1030 xdata = readb(&ICOM_PORT->dram->xchar);
1031 spin_unlock_irqrestore(&port->lock, flags);
1032 break;
1033 }
1034 spin_unlock_irqrestore(&port->lock, flags);
1035 msleep(10);
1036 }
1037 }
1038
1039 static void icom_stop_rx(struct uart_port *port)
1040 {
1041 unsigned char cmdReg;
1042
1043 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1044 writeb(cmdReg & ~CMD_RCV_ENABLE, &ICOM_PORT->dram->CmdReg);
1045 }
1046
1047 static void icom_enable_ms(struct uart_port *port)
1048 {
1049 /* no-op */
1050 }
1051
1052 static void icom_break(struct uart_port *port, int break_state)
1053 {
1054 unsigned char cmdReg;
1055 unsigned long flags;
1056
1057 spin_lock_irqsave(&port->lock, flags);
1058 trace(ICOM_PORT, "BREAK", 0);
1059 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1060 if (break_state == -1) {
1061 writeb(cmdReg | CMD_SND_BREAK, &ICOM_PORT->dram->CmdReg);
1062 } else {
1063 writeb(cmdReg & ~CMD_SND_BREAK, &ICOM_PORT->dram->CmdReg);
1064 }
1065 spin_unlock_irqrestore(&port->lock, flags);
1066 }
1067
1068 static int icom_open(struct uart_port *port)
1069 {
1070 int retval;
1071
1072 kref_get(&ICOM_PORT->adapter->kref);
1073 retval = startup(ICOM_PORT);
1074
1075 if (retval) {
1076 kref_put(&ICOM_PORT->adapter->kref, icom_kref_release);
1077 trace(ICOM_PORT, "STARTUP_ERROR", 0);
1078 return retval;
1079 }
1080
1081 return 0;
1082 }
1083
1084 static void icom_close(struct uart_port *port)
1085 {
1086 unsigned char cmdReg;
1087
1088 trace(ICOM_PORT, "CLOSE", 0);
1089
1090 /* stop receiver */
1091 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1092 writeb(cmdReg & (unsigned char) ~CMD_RCV_ENABLE,
1093 &ICOM_PORT->dram->CmdReg);
1094
1095 shutdown(ICOM_PORT);
1096
1097 kref_put(&ICOM_PORT->adapter->kref, icom_kref_release);
1098 }
1099
1100 static void icom_set_termios(struct uart_port *port,
1101 struct ktermios *termios,
1102 struct ktermios *old_termios)
1103 {
1104 int baud;
1105 unsigned cflag, iflag;
1106 char new_config2;
1107 char new_config3 = 0;
1108 char tmp_byte;
1109 int index;
1110 int rcv_buff, xmit_buff;
1111 unsigned long offset;
1112 unsigned long flags;
1113
1114 spin_lock_irqsave(&port->lock, flags);
1115 trace(ICOM_PORT, "CHANGE_SPEED", 0);
1116
1117 cflag = termios->c_cflag;
1118 iflag = termios->c_iflag;
1119
1120 new_config2 = ICOM_ACFG_DRIVE1;
1121
1122 /* byte size and parity */
1123 switch (cflag & CSIZE) {
1124 case CS5: /* 5 bits/char */
1125 new_config2 |= ICOM_ACFG_5BPC;
1126 break;
1127 case CS6: /* 6 bits/char */
1128 new_config2 |= ICOM_ACFG_6BPC;
1129 break;
1130 case CS7: /* 7 bits/char */
1131 new_config2 |= ICOM_ACFG_7BPC;
1132 break;
1133 case CS8: /* 8 bits/char */
1134 new_config2 |= ICOM_ACFG_8BPC;
1135 break;
1136 default:
1137 break;
1138 }
1139 if (cflag & CSTOPB) {
1140 /* 2 stop bits */
1141 new_config2 |= ICOM_ACFG_2STOP_BIT;
1142 }
1143 if (cflag & PARENB) {
1144 /* parity bit enabled */
1145 new_config2 |= ICOM_ACFG_PARITY_ENAB;
1146 trace(ICOM_PORT, "PARENB", 0);
1147 }
1148 if (cflag & PARODD) {
1149 /* odd parity */
1150 new_config2 |= ICOM_ACFG_PARITY_ODD;
1151 trace(ICOM_PORT, "PARODD", 0);
1152 }
1153
1154 /* Determine divisor based on baud rate */
1155 baud = uart_get_baud_rate(port, termios, old_termios,
1156 icom_acfg_baud[0],
1157 icom_acfg_baud[BAUD_TABLE_LIMIT]);
1158 if (!baud)
1159 baud = 9600; /* B0 transition handled in rs_set_termios */
1160
1161 for (index = 0; index < BAUD_TABLE_LIMIT; index++) {
1162 if (icom_acfg_baud[index] == baud) {
1163 new_config3 = index;
1164 break;
1165 }
1166 }
1167
1168 uart_update_timeout(port, cflag, baud);
1169
1170 /* CTS flow control flag and modem status interrupts */
1171 tmp_byte = readb(&(ICOM_PORT->dram->HDLCConfigReg));
1172 if (cflag & CRTSCTS)
1173 tmp_byte |= HDLC_HDW_FLOW;
1174 else
1175 tmp_byte &= ~HDLC_HDW_FLOW;
1176 writeb(tmp_byte, &(ICOM_PORT->dram->HDLCConfigReg));
1177
1178 /*
1179 * Set up parity check flag
1180 */
1181 ICOM_PORT->read_status_mask = SA_FLAGS_OVERRUN | SA_FL_RCV_DONE;
1182 if (iflag & INPCK)
1183 ICOM_PORT->read_status_mask |=
1184 SA_FLAGS_FRAME_ERROR | SA_FLAGS_PARITY_ERROR;
1185
1186 if ((iflag & BRKINT) || (iflag & PARMRK))
1187 ICOM_PORT->read_status_mask |= SA_FLAGS_BREAK_DET;
1188
1189 /*
1190 * Characters to ignore
1191 */
1192 ICOM_PORT->ignore_status_mask = 0;
1193 if (iflag & IGNPAR)
1194 ICOM_PORT->ignore_status_mask |=
1195 SA_FLAGS_PARITY_ERROR | SA_FLAGS_FRAME_ERROR;
1196 if (iflag & IGNBRK) {
1197 ICOM_PORT->ignore_status_mask |= SA_FLAGS_BREAK_DET;
1198 /*
1199 * If we're ignore parity and break indicators, ignore
1200 * overruns too. (For real raw support).
1201 */
1202 if (iflag & IGNPAR)
1203 ICOM_PORT->ignore_status_mask |= SA_FLAGS_OVERRUN;
1204 }
1205
1206 /*
1207 * !!! ignore all characters if CREAD is not set
1208 */
1209 if ((cflag & CREAD) == 0)
1210 ICOM_PORT->ignore_status_mask |= SA_FL_RCV_DONE;
1211
1212 /* Turn off Receiver to prepare for reset */
1213 writeb(CMD_RCV_DISABLE, &ICOM_PORT->dram->CmdReg);
1214
1215 for (index = 0; index < 10; index++) {
1216 if (readb(&ICOM_PORT->dram->PrevCmdReg) == 0x00) {
1217 break;
1218 }
1219 }
1220
1221 /* clear all current buffers of data */
1222 for (rcv_buff = 0; rcv_buff < NUM_RBUFFS; rcv_buff++) {
1223 ICOM_PORT->statStg->rcv[rcv_buff].flags = 0;
1224 ICOM_PORT->statStg->rcv[rcv_buff].leLength = 0;
1225 ICOM_PORT->statStg->rcv[rcv_buff].WorkingLength =
1226 (unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
1227 }
1228
1229 for (xmit_buff = 0; xmit_buff < NUM_XBUFFS; xmit_buff++) {
1230 ICOM_PORT->statStg->xmit[xmit_buff].flags = 0;
1231 }
1232
1233 /* activate changes and start xmit and receiver here */
1234 /* Enable the receiver */
1235 writeb(new_config3, &(ICOM_PORT->dram->async_config3));
1236 writeb(new_config2, &(ICOM_PORT->dram->async_config2));
1237 tmp_byte = readb(&(ICOM_PORT->dram->HDLCConfigReg));
1238 tmp_byte |= HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL;
1239 writeb(tmp_byte, &(ICOM_PORT->dram->HDLCConfigReg));
1240 writeb(0x04, &(ICOM_PORT->dram->FlagFillIdleTimer)); /* 0.5 seconds */
1241 writeb(0xFF, &(ICOM_PORT->dram->ier)); /* enable modem signal interrupts */
1242
1243 /* reset processor */
1244 writeb(CMD_RESTART, &ICOM_PORT->dram->CmdReg);
1245
1246 for (index = 0; index < 10; index++) {
1247 if (readb(&ICOM_PORT->dram->CmdReg) == 0x00) {
1248 break;
1249 }
1250 }
1251
1252 /* Enable Transmitter and Reciever */
1253 offset =
1254 (unsigned long) &ICOM_PORT->statStg->rcv[0] -
1255 (unsigned long) ICOM_PORT->statStg;
1256 writel(ICOM_PORT->statStg_pci + offset,
1257 &ICOM_PORT->dram->RcvStatusAddr);
1258 ICOM_PORT->next_rcv = 0;
1259 ICOM_PORT->put_length = 0;
1260 *ICOM_PORT->xmitRestart = 0;
1261 writel(ICOM_PORT->xmitRestart_pci,
1262 &ICOM_PORT->dram->XmitStatusAddr);
1263 trace(ICOM_PORT, "XR_ENAB", 0);
1264 writeb(CMD_XMIT_RCV_ENABLE, &ICOM_PORT->dram->CmdReg);
1265
1266 spin_unlock_irqrestore(&port->lock, flags);
1267 }
1268
1269 static const char *icom_type(struct uart_port *port)
1270 {
1271 return "icom";
1272 }
1273
1274 static void icom_release_port(struct uart_port *port)
1275 {
1276 }
1277
1278 static int icom_request_port(struct uart_port *port)
1279 {
1280 return 0;
1281 }
1282
1283 static void icom_config_port(struct uart_port *port, int flags)
1284 {
1285 port->type = PORT_ICOM;
1286 }
1287
1288 static struct uart_ops icom_ops = {
1289 .tx_empty = icom_tx_empty,
1290 .set_mctrl = icom_set_mctrl,
1291 .get_mctrl = icom_get_mctrl,
1292 .stop_tx = icom_stop_tx,
1293 .start_tx = icom_start_tx,
1294 .send_xchar = icom_send_xchar,
1295 .stop_rx = icom_stop_rx,
1296 .enable_ms = icom_enable_ms,
1297 .break_ctl = icom_break,
1298 .startup = icom_open,
1299 .shutdown = icom_close,
1300 .set_termios = icom_set_termios,
1301 .type = icom_type,
1302 .release_port = icom_release_port,
1303 .request_port = icom_request_port,
1304 .config_port = icom_config_port,
1305 };
1306
1307 #define ICOM_CONSOLE NULL
1308
1309 static struct uart_driver icom_uart_driver = {
1310 .owner = THIS_MODULE,
1311 .driver_name = ICOM_DRIVER_NAME,
1312 .dev_name = "ttyA",
1313 .major = ICOM_MAJOR,
1314 .minor = ICOM_MINOR_START,
1315 .nr = NR_PORTS,
1316 .cons = ICOM_CONSOLE,
1317 };
1318
1319 static int __devinit icom_init_ports(struct icom_adapter *icom_adapter)
1320 {
1321 u32 subsystem_id = icom_adapter->subsystem_id;
1322 int i;
1323 struct icom_port *icom_port;
1324
1325 if (icom_adapter->version == ADAPTER_V1) {
1326 icom_adapter->numb_ports = 2;
1327
1328 for (i = 0; i < 2; i++) {
1329 icom_port = &icom_adapter->port_info[i];
1330 icom_port->port = i;
1331 icom_port->status = ICOM_PORT_ACTIVE;
1332 icom_port->imbed_modem = ICOM_UNKNOWN;
1333 }
1334 } else {
1335 if (subsystem_id == PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL) {
1336 icom_adapter->numb_ports = 4;
1337
1338 for (i = 0; i < 4; i++) {
1339 icom_port = &icom_adapter->port_info[i];
1340
1341 icom_port->port = i;
1342 icom_port->status = ICOM_PORT_ACTIVE;
1343 icom_port->imbed_modem = ICOM_IMBED_MODEM;
1344 }
1345 } else {
1346 icom_adapter->numb_ports = 4;
1347
1348 icom_adapter->port_info[0].port = 0;
1349 icom_adapter->port_info[0].status = ICOM_PORT_ACTIVE;
1350
1351 if (subsystem_id ==
1352 PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM) {
1353 icom_adapter->port_info[0].imbed_modem = ICOM_IMBED_MODEM;
1354 } else {
1355 icom_adapter->port_info[0].imbed_modem = ICOM_RVX;
1356 }
1357
1358 icom_adapter->port_info[1].status = ICOM_PORT_OFF;
1359
1360 icom_adapter->port_info[2].port = 2;
1361 icom_adapter->port_info[2].status = ICOM_PORT_ACTIVE;
1362 icom_adapter->port_info[2].imbed_modem = ICOM_RVX;
1363 icom_adapter->port_info[3].status = ICOM_PORT_OFF;
1364 }
1365 }
1366
1367 return 0;
1368 }
1369
1370 static void icom_port_active(struct icom_port *icom_port, struct icom_adapter *icom_adapter, int port_num)
1371 {
1372 if (icom_adapter->version == ADAPTER_V1) {
1373 icom_port->global_reg = icom_adapter->base_addr + 0x4000;
1374 icom_port->int_reg = icom_adapter->base_addr +
1375 0x4004 + 2 - 2 * port_num;
1376 } else {
1377 icom_port->global_reg = icom_adapter->base_addr + 0x8000;
1378 if (icom_port->port < 2)
1379 icom_port->int_reg = icom_adapter->base_addr +
1380 0x8004 + 2 - 2 * icom_port->port;
1381 else
1382 icom_port->int_reg = icom_adapter->base_addr +
1383 0x8024 + 2 - 2 * (icom_port->port - 2);
1384 }
1385 }
1386 static int __devinit icom_load_ports(struct icom_adapter *icom_adapter)
1387 {
1388 struct icom_port *icom_port;
1389 int port_num;
1390
1391 for (port_num = 0; port_num < icom_adapter->numb_ports; port_num++) {
1392
1393 icom_port = &icom_adapter->port_info[port_num];
1394
1395 if (icom_port->status == ICOM_PORT_ACTIVE) {
1396 icom_port_active(icom_port, icom_adapter, port_num);
1397 icom_port->dram = icom_adapter->base_addr +
1398 0x2000 * icom_port->port;
1399
1400 icom_port->adapter = icom_adapter;
1401
1402 /* get port memory */
1403 if (get_port_memory(icom_port) != 0) {
1404 dev_err(&icom_port->adapter->pci_dev->dev,
1405 "Memory allocation for port FAILED\n");
1406 }
1407 }
1408 }
1409 return 0;
1410 }
1411
1412 static int __devinit icom_alloc_adapter(struct icom_adapter
1413 **icom_adapter_ref)
1414 {
1415 int adapter_count = 0;
1416 struct icom_adapter *icom_adapter;
1417 struct icom_adapter *cur_adapter_entry;
1418 struct list_head *tmp;
1419
1420 icom_adapter = (struct icom_adapter *)
1421 kzalloc(sizeof(struct icom_adapter), GFP_KERNEL);
1422
1423 if (!icom_adapter) {
1424 return -ENOMEM;
1425 }
1426
1427 list_for_each(tmp, &icom_adapter_head) {
1428 cur_adapter_entry =
1429 list_entry(tmp, struct icom_adapter,
1430 icom_adapter_entry);
1431 if (cur_adapter_entry->index != adapter_count) {
1432 break;
1433 }
1434 adapter_count++;
1435 }
1436
1437 icom_adapter->index = adapter_count;
1438 list_add_tail(&icom_adapter->icom_adapter_entry, tmp);
1439
1440 *icom_adapter_ref = icom_adapter;
1441 return 0;
1442 }
1443
1444 static void icom_free_adapter(struct icom_adapter *icom_adapter)
1445 {
1446 list_del(&icom_adapter->icom_adapter_entry);
1447 kfree(icom_adapter);
1448 }
1449
1450 static void icom_remove_adapter(struct icom_adapter *icom_adapter)
1451 {
1452 struct icom_port *icom_port;
1453 int index;
1454
1455 for (index = 0; index < icom_adapter->numb_ports; index++) {
1456 icom_port = &icom_adapter->port_info[index];
1457
1458 if (icom_port->status == ICOM_PORT_ACTIVE) {
1459 dev_info(&icom_adapter->pci_dev->dev,
1460 "Device removed\n");
1461
1462 uart_remove_one_port(&icom_uart_driver,
1463 &icom_port->uart_port);
1464
1465 /* be sure that DTR and RTS are dropped */
1466 writeb(0x00, &icom_port->dram->osr);
1467
1468 /* Wait 0.1 Sec for simple Init to complete */
1469 msleep(100);
1470
1471 /* Stop proccessor */
1472 stop_processor(icom_port);
1473
1474 free_port_memory(icom_port);
1475 }
1476 }
1477
1478 free_irq(icom_adapter->pci_dev->irq, (void *) icom_adapter);
1479 iounmap(icom_adapter->base_addr);
1480 pci_release_regions(icom_adapter->pci_dev);
1481 icom_free_adapter(icom_adapter);
1482 }
1483
1484 static void icom_kref_release(struct kref *kref)
1485 {
1486 struct icom_adapter *icom_adapter;
1487
1488 icom_adapter = to_icom_adapter(kref);
1489 icom_remove_adapter(icom_adapter);
1490 }
1491
1492 static int __devinit icom_probe(struct pci_dev *dev,
1493 const struct pci_device_id *ent)
1494 {
1495 int index;
1496 unsigned int command_reg;
1497 int retval;
1498 struct icom_adapter *icom_adapter;
1499 struct icom_port *icom_port;
1500
1501 retval = pci_enable_device(dev);
1502 if (retval) {
1503 dev_err(&dev->dev, "Device enable FAILED\n");
1504 return retval;
1505 }
1506
1507 if ( (retval = pci_request_regions(dev, "icom"))) {
1508 dev_err(&dev->dev, "pci_request_regions FAILED\n");
1509 pci_disable_device(dev);
1510 return retval;
1511 }
1512
1513 pci_set_master(dev);
1514
1515 if ( (retval = pci_read_config_dword(dev, PCI_COMMAND, &command_reg))) {
1516 dev_err(&dev->dev, "PCI Config read FAILED\n");
1517 return retval;
1518 }
1519
1520 pci_write_config_dword(dev, PCI_COMMAND,
1521 command_reg | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
1522 | PCI_COMMAND_PARITY | PCI_COMMAND_SERR);
1523
1524 if (ent->driver_data == ADAPTER_V1) {
1525 pci_write_config_dword(dev, 0x44, 0x8300830A);
1526 } else {
1527 pci_write_config_dword(dev, 0x44, 0x42004200);
1528 pci_write_config_dword(dev, 0x48, 0x42004200);
1529 }
1530
1531
1532 retval = icom_alloc_adapter(&icom_adapter);
1533 if (retval) {
1534 dev_err(&dev->dev, "icom_alloc_adapter FAILED\n");
1535 retval = -EIO;
1536 goto probe_exit0;
1537 }
1538
1539 icom_adapter->base_addr_pci = pci_resource_start(dev, 0);
1540 icom_adapter->pci_dev = dev;
1541 icom_adapter->version = ent->driver_data;
1542 icom_adapter->subsystem_id = ent->subdevice;
1543
1544
1545 retval = icom_init_ports(icom_adapter);
1546 if (retval) {
1547 dev_err(&dev->dev, "Port configuration failed\n");
1548 goto probe_exit1;
1549 }
1550
1551 icom_adapter->base_addr = pci_ioremap_bar(dev, 0);
1552
1553 if (!icom_adapter->base_addr)
1554 goto probe_exit1;
1555
1556 /* save off irq and request irq line */
1557 if ( (retval = request_irq(dev->irq, icom_interrupt,
1558 IRQF_DISABLED | IRQF_SHARED, ICOM_DRIVER_NAME,
1559 (void *) icom_adapter))) {
1560 goto probe_exit2;
1561 }
1562
1563 retval = icom_load_ports(icom_adapter);
1564
1565 for (index = 0; index < icom_adapter->numb_ports; index++) {
1566 icom_port = &icom_adapter->port_info[index];
1567
1568 if (icom_port->status == ICOM_PORT_ACTIVE) {
1569 icom_port->uart_port.irq = icom_port->adapter->pci_dev->irq;
1570 icom_port->uart_port.type = PORT_ICOM;
1571 icom_port->uart_port.iotype = UPIO_MEM;
1572 icom_port->uart_port.membase =
1573 (char *) icom_adapter->base_addr_pci;
1574 icom_port->uart_port.fifosize = 16;
1575 icom_port->uart_port.ops = &icom_ops;
1576 icom_port->uart_port.line =
1577 icom_port->port + icom_adapter->index * 4;
1578 if (uart_add_one_port (&icom_uart_driver, &icom_port->uart_port)) {
1579 icom_port->status = ICOM_PORT_OFF;
1580 dev_err(&dev->dev, "Device add failed\n");
1581 } else
1582 dev_info(&dev->dev, "Device added\n");
1583 }
1584 }
1585
1586 kref_init(&icom_adapter->kref);
1587 return 0;
1588
1589 probe_exit2:
1590 iounmap(icom_adapter->base_addr);
1591 probe_exit1:
1592 icom_free_adapter(icom_adapter);
1593
1594 probe_exit0:
1595 pci_release_regions(dev);
1596 pci_disable_device(dev);
1597
1598 return retval;
1599 }
1600
1601 static void __devexit icom_remove(struct pci_dev *dev)
1602 {
1603 struct icom_adapter *icom_adapter;
1604 struct list_head *tmp;
1605
1606 list_for_each(tmp, &icom_adapter_head) {
1607 icom_adapter = list_entry(tmp, struct icom_adapter,
1608 icom_adapter_entry);
1609 if (icom_adapter->pci_dev == dev) {
1610 kref_put(&icom_adapter->kref, icom_kref_release);
1611 return;
1612 }
1613 }
1614
1615 dev_err(&dev->dev, "Unable to find device to remove\n");
1616 }
1617
1618 static struct pci_driver icom_pci_driver = {
1619 .name = ICOM_DRIVER_NAME,
1620 .id_table = icom_pci_table,
1621 .probe = icom_probe,
1622 .remove = __devexit_p(icom_remove),
1623 };
1624
1625 static int __init icom_init(void)
1626 {
1627 int ret;
1628
1629 spin_lock_init(&icom_lock);
1630
1631 ret = uart_register_driver(&icom_uart_driver);
1632 if (ret)
1633 return ret;
1634
1635 ret = pci_register_driver(&icom_pci_driver);
1636
1637 if (ret < 0)
1638 uart_unregister_driver(&icom_uart_driver);
1639
1640 return ret;
1641 }
1642
1643 static void __exit icom_exit(void)
1644 {
1645 pci_unregister_driver(&icom_pci_driver);
1646 uart_unregister_driver(&icom_uart_driver);
1647 }
1648
1649 module_init(icom_init);
1650 module_exit(icom_exit);
1651
1652 MODULE_AUTHOR("Michael Anderson <mjanders@us.ibm.com>");
1653 MODULE_DESCRIPTION("IBM iSeries Serial IOA driver");
1654 MODULE_SUPPORTED_DEVICE
1655 ("IBM iSeries 2745, 2771, 2772, 2742, 2793 and 2805 Communications adapters");
1656 MODULE_LICENSE("GPL");
1657
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