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Linux 3.11-rc3
[cris-mirror.git] / drivers / tty / serial / icom.c
blob18ed5aebb166da78f9f10e8f163191e9f97bbc49
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/io.h>
56 #include <asm/irq.h>
57 #include <asm/uaccess.h>
58
59 #include "icom.h"
60
61 /*#define ICOM_TRACE enable port trace capabilities */
62
63 #define ICOM_DRIVER_NAME "icom"
64 #define ICOM_VERSION_STR "1.3.1"
65 #define NR_PORTS 128
66 #define ICOM_PORT ((struct icom_port *)port)
67 #define to_icom_adapter(d) container_of(d, struct icom_adapter, kref)
68
69 static const struct pci_device_id icom_pci_table[] = {
70 {
71 .vendor = PCI_VENDOR_ID_IBM,
72 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_1,
73 .subvendor = PCI_ANY_ID,
74 .subdevice = PCI_ANY_ID,
75 .driver_data = ADAPTER_V1,
76 },
77 {
78 .vendor = PCI_VENDOR_ID_IBM,
79 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
80 .subvendor = PCI_VENDOR_ID_IBM,
81 .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_TWO_PORTS_RVX,
82 .driver_data = ADAPTER_V2,
83 },
84 {
85 .vendor = PCI_VENDOR_ID_IBM,
86 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
87 .subvendor = PCI_VENDOR_ID_IBM,
88 .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM,
89 .driver_data = ADAPTER_V2,
90 },
91 {
92 .vendor = PCI_VENDOR_ID_IBM,
93 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
94 .subvendor = PCI_VENDOR_ID_IBM,
95 .subdevice = PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL,
96 .driver_data = ADAPTER_V2,
97 },
98 {
99 .vendor = PCI_VENDOR_ID_IBM,
100 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
101 .subvendor = PCI_VENDOR_ID_IBM,
102 .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM_PCIE,
103 .driver_data = ADAPTER_V2,
104 },
105 {}
106 };
107
108 struct lookup_proc_table start_proc[4] = {
109 {NULL, ICOM_CONTROL_START_A},
110 {NULL, ICOM_CONTROL_START_B},
111 {NULL, ICOM_CONTROL_START_C},
112 {NULL, ICOM_CONTROL_START_D}
113 };
114
115
116 struct lookup_proc_table stop_proc[4] = {
117 {NULL, ICOM_CONTROL_STOP_A},
118 {NULL, ICOM_CONTROL_STOP_B},
119 {NULL, ICOM_CONTROL_STOP_C},
120 {NULL, ICOM_CONTROL_STOP_D}
121 };
122
123 struct lookup_int_table int_mask_tbl[4] = {
124 {NULL, ICOM_INT_MASK_PRC_A},
125 {NULL, ICOM_INT_MASK_PRC_B},
126 {NULL, ICOM_INT_MASK_PRC_C},
127 {NULL, ICOM_INT_MASK_PRC_D},
128 };
129
130
131 MODULE_DEVICE_TABLE(pci, icom_pci_table);
132
133 static LIST_HEAD(icom_adapter_head);
134
135 /* spinlock for adapter initialization and changing adapter operations */
136 static spinlock_t icom_lock;
137
138 #ifdef ICOM_TRACE
139 static inline void trace(struct icom_port *icom_port, char *trace_pt,
140 unsigned long trace_data)
141 {
142 dev_info(&icom_port->adapter->pci_dev->dev, ":%d:%s - %lx\n",
143 icom_port->port, trace_pt, trace_data);
144 }
145 #else
146 static inline void trace(struct icom_port *icom_port, char *trace_pt, unsigned long trace_data) {};
147 #endif
148 static void icom_kref_release(struct kref *kref);
149
150 static void free_port_memory(struct icom_port *icom_port)
151 {
152 struct pci_dev *dev = icom_port->adapter->pci_dev;
153
154 trace(icom_port, "RET_PORT_MEM", 0);
155 if (icom_port->recv_buf) {
156 pci_free_consistent(dev, 4096, icom_port->recv_buf,
157 icom_port->recv_buf_pci);
158 icom_port->recv_buf = NULL;
159 }
160 if (icom_port->xmit_buf) {
161 pci_free_consistent(dev, 4096, icom_port->xmit_buf,
162 icom_port->xmit_buf_pci);
163 icom_port->xmit_buf = NULL;
164 }
165 if (icom_port->statStg) {
166 pci_free_consistent(dev, 4096, icom_port->statStg,
167 icom_port->statStg_pci);
168 icom_port->statStg = NULL;
169 }
170
171 if (icom_port->xmitRestart) {
172 pci_free_consistent(dev, 4096, icom_port->xmitRestart,
173 icom_port->xmitRestart_pci);
174 icom_port->xmitRestart = NULL;
175 }
176 }
177
178 static int get_port_memory(struct icom_port *icom_port)
179 {
180 int index;
181 unsigned long stgAddr;
182 unsigned long startStgAddr;
183 unsigned long offset;
184 struct pci_dev *dev = icom_port->adapter->pci_dev;
185
186 icom_port->xmit_buf =
187 pci_alloc_consistent(dev, 4096, &icom_port->xmit_buf_pci);
188 if (!icom_port->xmit_buf) {
189 dev_err(&dev->dev, "Can not allocate Transmit buffer\n");
190 return -ENOMEM;
191 }
192
193 trace(icom_port, "GET_PORT_MEM",
194 (unsigned long) icom_port->xmit_buf);
195
196 icom_port->recv_buf =
197 pci_alloc_consistent(dev, 4096, &icom_port->recv_buf_pci);
198 if (!icom_port->recv_buf) {
199 dev_err(&dev->dev, "Can not allocate Receive buffer\n");
200 free_port_memory(icom_port);
201 return -ENOMEM;
202 }
203 trace(icom_port, "GET_PORT_MEM",
204 (unsigned long) icom_port->recv_buf);
205
206 icom_port->statStg =
207 pci_alloc_consistent(dev, 4096, &icom_port->statStg_pci);
208 if (!icom_port->statStg) {
209 dev_err(&dev->dev, "Can not allocate Status buffer\n");
210 free_port_memory(icom_port);
211 return -ENOMEM;
212 }
213 trace(icom_port, "GET_PORT_MEM",
214 (unsigned long) icom_port->statStg);
215
216 icom_port->xmitRestart =
217 pci_alloc_consistent(dev, 4096, &icom_port->xmitRestart_pci);
218 if (!icom_port->xmitRestart) {
219 dev_err(&dev->dev,
220 "Can not allocate xmit Restart buffer\n");
221 free_port_memory(icom_port);
222 return -ENOMEM;
223 }
224
225 memset(icom_port->statStg, 0, 4096);
226
227 /* FODs: Frame Out Descriptor Queue, this is a FIFO queue that
228 indicates that frames are to be transmitted
229 */
230
231 stgAddr = (unsigned long) icom_port->statStg;
232 for (index = 0; index < NUM_XBUFFS; index++) {
233 trace(icom_port, "FOD_ADDR", stgAddr);
234 stgAddr = stgAddr + sizeof(icom_port->statStg->xmit[0]);
235 if (index < (NUM_XBUFFS - 1)) {
236 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
237 icom_port->statStg->xmit[index].leLengthASD =
238 (unsigned short int) cpu_to_le16(XMIT_BUFF_SZ);
239 trace(icom_port, "FOD_ADDR", stgAddr);
240 trace(icom_port, "FOD_XBUFF",
241 (unsigned long) icom_port->xmit_buf);
242 icom_port->statStg->xmit[index].leBuffer =
243 cpu_to_le32(icom_port->xmit_buf_pci);
244 } else if (index == (NUM_XBUFFS - 1)) {
245 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
246 icom_port->statStg->xmit[index].leLengthASD =
247 (unsigned short int) cpu_to_le16(XMIT_BUFF_SZ);
248 trace(icom_port, "FOD_XBUFF",
249 (unsigned long) icom_port->xmit_buf);
250 icom_port->statStg->xmit[index].leBuffer =
251 cpu_to_le32(icom_port->xmit_buf_pci);
252 } else {
253 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
254 }
255 }
256 /* FIDs */
257 startStgAddr = stgAddr;
258
259 /* fill in every entry, even if no buffer */
260 for (index = 0; index < NUM_RBUFFS; index++) {
261 trace(icom_port, "FID_ADDR", stgAddr);
262 stgAddr = stgAddr + sizeof(icom_port->statStg->rcv[0]);
263 icom_port->statStg->rcv[index].leLength = 0;
264 icom_port->statStg->rcv[index].WorkingLength =
265 (unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
266 if (index < (NUM_RBUFFS - 1) ) {
267 offset = stgAddr - (unsigned long) icom_port->statStg;
268 icom_port->statStg->rcv[index].leNext =
269 cpu_to_le32(icom_port-> statStg_pci + offset);
270 trace(icom_port, "FID_RBUFF",
271 (unsigned long) icom_port->recv_buf);
272 icom_port->statStg->rcv[index].leBuffer =
273 cpu_to_le32(icom_port->recv_buf_pci);
274 } else if (index == (NUM_RBUFFS -1) ) {
275 offset = startStgAddr - (unsigned long) icom_port->statStg;
276 icom_port->statStg->rcv[index].leNext =
277 cpu_to_le32(icom_port-> statStg_pci + offset);
278 trace(icom_port, "FID_RBUFF",
279 (unsigned long) icom_port->recv_buf + 2048);
280 icom_port->statStg->rcv[index].leBuffer =
281 cpu_to_le32(icom_port->recv_buf_pci + 2048);
282 } else {
283 icom_port->statStg->rcv[index].leNext = 0;
284 icom_port->statStg->rcv[index].leBuffer = 0;
285 }
286 }
287
288 return 0;
289 }
290
291 static void stop_processor(struct icom_port *icom_port)
292 {
293 unsigned long temp;
294 unsigned long flags;
295 int port;
296
297 spin_lock_irqsave(&icom_lock, flags);
298
299 port = icom_port->port;
300 if (port == 0 || port == 1)
301 stop_proc[port].global_control_reg = &icom_port->global_reg->control;
302 else
303 stop_proc[port].global_control_reg = &icom_port->global_reg->control_2;
304
305
306 if (port < 4) {
307 temp = readl(stop_proc[port].global_control_reg);
308 temp =
309 (temp & ~start_proc[port].processor_id) | stop_proc[port].processor_id;
310 writel(temp, stop_proc[port].global_control_reg);
311
312 /* write flush */
313 readl(stop_proc[port].global_control_reg);
314 } else {
315 dev_err(&icom_port->adapter->pci_dev->dev,
316 "Invalid port assignment\n");
317 }
318
319 spin_unlock_irqrestore(&icom_lock, flags);
320 }
321
322 static void start_processor(struct icom_port *icom_port)
323 {
324 unsigned long temp;
325 unsigned long flags;
326 int port;
327
328 spin_lock_irqsave(&icom_lock, flags);
329
330 port = icom_port->port;
331 if (port == 0 || port == 1)
332 start_proc[port].global_control_reg = &icom_port->global_reg->control;
333 else
334 start_proc[port].global_control_reg = &icom_port->global_reg->control_2;
335 if (port < 4) {
336 temp = readl(start_proc[port].global_control_reg);
337 temp =
338 (temp & ~stop_proc[port].processor_id) | start_proc[port].processor_id;
339 writel(temp, start_proc[port].global_control_reg);
340
341 /* write flush */
342 readl(start_proc[port].global_control_reg);
343 } else {
344 dev_err(&icom_port->adapter->pci_dev->dev,
345 "Invalid port assignment\n");
346 }
347
348 spin_unlock_irqrestore(&icom_lock, flags);
349 }
350
351 static void load_code(struct icom_port *icom_port)
352 {
353 const struct firmware *fw;
354 char __iomem *iram_ptr;
355 int index;
356 int status = 0;
357 void __iomem *dram_ptr = icom_port->dram;
358 dma_addr_t temp_pci;
359 unsigned char *new_page = NULL;
360 unsigned char cable_id = NO_CABLE;
361 struct pci_dev *dev = icom_port->adapter->pci_dev;
362
363 /* Clear out any pending interrupts */
364 writew(0x3FFF, icom_port->int_reg);
365
366 trace(icom_port, "CLEAR_INTERRUPTS", 0);
367
368 /* Stop processor */
369 stop_processor(icom_port);
370
371 /* Zero out DRAM */
372 memset_io(dram_ptr, 0, 512);
373
374 /* Load Call Setup into Adapter */
375 if (request_firmware(&fw, "icom_call_setup.bin", &dev->dev) < 0) {
376 dev_err(&dev->dev,"Unable to load icom_call_setup.bin firmware image\n");
377 status = -1;
378 goto load_code_exit;
379 }
380
381 if (fw->size > ICOM_DCE_IRAM_OFFSET) {
382 dev_err(&dev->dev, "Invalid firmware image for icom_call_setup.bin found.\n");
383 release_firmware(fw);
384 status = -1;
385 goto load_code_exit;
386 }
387
388 iram_ptr = (char __iomem *)icom_port->dram + ICOM_IRAM_OFFSET;
389 for (index = 0; index < fw->size; index++)
390 writeb(fw->data[index], &iram_ptr[index]);
391
392 release_firmware(fw);
393
394 /* Load Resident DCE portion of Adapter */
395 if (request_firmware(&fw, "icom_res_dce.bin", &dev->dev) < 0) {
396 dev_err(&dev->dev,"Unable to load icom_res_dce.bin firmware image\n");
397 status = -1;
398 goto load_code_exit;
399 }
400
401 if (fw->size > ICOM_IRAM_SIZE) {
402 dev_err(&dev->dev, "Invalid firmware image for icom_res_dce.bin found.\n");
403 release_firmware(fw);
404 status = -1;
405 goto load_code_exit;
406 }
407
408 iram_ptr = (char __iomem *) icom_port->dram + ICOM_IRAM_OFFSET;
409 for (index = ICOM_DCE_IRAM_OFFSET; index < fw->size; index++)
410 writeb(fw->data[index], &iram_ptr[index]);
411
412 release_firmware(fw);
413
414 /* Set Hardware level */
415 if (icom_port->adapter->version == ADAPTER_V2)
416 writeb(V2_HARDWARE, &(icom_port->dram->misc_flags));
417
418 /* Start the processor in Adapter */
419 start_processor(icom_port);
420
421 writeb((HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL),
422 &(icom_port->dram->HDLCConfigReg));
423 writeb(0x04, &(icom_port->dram->FlagFillIdleTimer)); /* 0.5 seconds */
424 writeb(0x00, &(icom_port->dram->CmdReg));
425 writeb(0x10, &(icom_port->dram->async_config3));
426 writeb((ICOM_ACFG_DRIVE1 | ICOM_ACFG_NO_PARITY | ICOM_ACFG_8BPC |
427 ICOM_ACFG_1STOP_BIT), &(icom_port->dram->async_config2));
428
429 /*Set up data in icom DRAM to indicate where personality
430 *code is located and its length.
431 */
432 new_page = pci_alloc_consistent(dev, 4096, &temp_pci);
433
434 if (!new_page) {
435 dev_err(&dev->dev, "Can not allocate DMA buffer\n");
436 status = -1;
437 goto load_code_exit;
438 }
439
440 if (request_firmware(&fw, "icom_asc.bin", &dev->dev) < 0) {
441 dev_err(&dev->dev,"Unable to load icom_asc.bin firmware image\n");
442 status = -1;
443 goto load_code_exit;
444 }
445
446 if (fw->size > ICOM_DCE_IRAM_OFFSET) {
447 dev_err(&dev->dev, "Invalid firmware image for icom_asc.bin found.\n");
448 release_firmware(fw);
449 status = -1;
450 goto load_code_exit;
451 }
452
453 for (index = 0; index < fw->size; index++)
454 new_page[index] = fw->data[index];
455
456 release_firmware(fw);
457
458 writeb((char) ((fw->size + 16)/16), &icom_port->dram->mac_length);
459 writel(temp_pci, &icom_port->dram->mac_load_addr);
460
461 /*Setting the syncReg to 0x80 causes adapter to start downloading
462 the personality code into adapter instruction RAM.
463 Once code is loaded, it will begin executing and, based on
464 information provided above, will start DMAing data from
465 shared memory to adapter DRAM.
466 */
467 /* the wait loop below verifies this write operation has been done
468 and processed
469 */
470 writeb(START_DOWNLOAD, &icom_port->dram->sync);
471
472 /* Wait max 1 Sec for data download and processor to start */
473 for (index = 0; index < 10; index++) {
474 msleep(100);
475 if (readb(&icom_port->dram->misc_flags) & ICOM_HDW_ACTIVE)
476 break;
477 }
478
479 if (index == 10)
480 status = -1;
481
482 /*
483 * check Cable ID
484 */
485 cable_id = readb(&icom_port->dram->cable_id);
486
487 if (cable_id & ICOM_CABLE_ID_VALID) {
488 /* Get cable ID into the lower 4 bits (standard form) */
489 cable_id = (cable_id & ICOM_CABLE_ID_MASK) >> 4;
490 icom_port->cable_id = cable_id;
491 } else {
492 dev_err(&dev->dev,"Invalid or no cable attached\n");
493 icom_port->cable_id = NO_CABLE;
494 }
495
496 load_code_exit:
497
498 if (status != 0) {
499 /* Clear out any pending interrupts */
500 writew(0x3FFF, icom_port->int_reg);
501
502 /* Turn off port */
503 writeb(ICOM_DISABLE, &(icom_port->dram->disable));
504
505 /* Stop processor */
506 stop_processor(icom_port);
507
508 dev_err(&icom_port->adapter->pci_dev->dev,"Port not operational\n");
509 }
510
511 if (new_page != NULL)
512 pci_free_consistent(dev, 4096, new_page, temp_pci);
513 }
514
515 static int startup(struct icom_port *icom_port)
516 {
517 unsigned long temp;
518 unsigned char cable_id, raw_cable_id;
519 unsigned long flags;
520 int port;
521
522 trace(icom_port, "STARTUP", 0);
523
524 if (!icom_port->dram) {
525 /* should NEVER be NULL */
526 dev_err(&icom_port->adapter->pci_dev->dev,
527 "Unusable Port, port configuration missing\n");
528 return -ENODEV;
529 }
530
531 /*
532 * check Cable ID
533 */
534 raw_cable_id = readb(&icom_port->dram->cable_id);
535 trace(icom_port, "CABLE_ID", raw_cable_id);
536
537 /* Get cable ID into the lower 4 bits (standard form) */
538 cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4;
539
540 /* Check for valid Cable ID */
541 if (!(raw_cable_id & ICOM_CABLE_ID_VALID) ||
542 (cable_id != icom_port->cable_id)) {
543
544 /* reload adapter code, pick up any potential changes in cable id */
545 load_code(icom_port);
546
547 /* still no sign of cable, error out */
548 raw_cable_id = readb(&icom_port->dram->cable_id);
549 cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4;
550 if (!(raw_cable_id & ICOM_CABLE_ID_VALID) ||
551 (icom_port->cable_id == NO_CABLE))
552 return -EIO;
553 }
554
555 /*
556 * Finally, clear and enable interrupts
557 */
558 spin_lock_irqsave(&icom_lock, flags);
559 port = icom_port->port;
560 if (port == 0 || port == 1)
561 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask;
562 else
563 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2;
564
565 if (port == 0 || port == 2)
566 writew(0x00FF, icom_port->int_reg);
567 else
568 writew(0x3F00, icom_port->int_reg);
569 if (port < 4) {
570 temp = readl(int_mask_tbl[port].global_int_mask);
571 writel(temp & ~int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask);
572
573 /* write flush */
574 readl(int_mask_tbl[port].global_int_mask);
575 } else {
576 dev_err(&icom_port->adapter->pci_dev->dev,
577 "Invalid port assignment\n");
578 }
579
580 spin_unlock_irqrestore(&icom_lock, flags);
581 return 0;
582 }
583
584 static void shutdown(struct icom_port *icom_port)
585 {
586 unsigned long temp;
587 unsigned char cmdReg;
588 unsigned long flags;
589 int port;
590
591 spin_lock_irqsave(&icom_lock, flags);
592 trace(icom_port, "SHUTDOWN", 0);
593
594 /*
595 * disable all interrupts
596 */
597 port = icom_port->port;
598 if (port == 0 || port == 1)
599 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask;
600 else
601 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2;
602
603 if (port < 4) {
604 temp = readl(int_mask_tbl[port].global_int_mask);
605 writel(temp | int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask);
606
607 /* write flush */
608 readl(int_mask_tbl[port].global_int_mask);
609 } else {
610 dev_err(&icom_port->adapter->pci_dev->dev,
611 "Invalid port assignment\n");
612 }
613 spin_unlock_irqrestore(&icom_lock, flags);
614
615 /*
616 * disable break condition
617 */
618 cmdReg = readb(&icom_port->dram->CmdReg);
619 if (cmdReg & CMD_SND_BREAK) {
620 writeb(cmdReg & ~CMD_SND_BREAK, &icom_port->dram->CmdReg);
621 }
622 }
623
624 static int icom_write(struct uart_port *port)
625 {
626 unsigned long data_count;
627 unsigned char cmdReg;
628 unsigned long offset;
629 int temp_tail = port->state->xmit.tail;
630
631 trace(ICOM_PORT, "WRITE", 0);
632
633 if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) &
634 SA_FLAGS_READY_TO_XMIT) {
635 trace(ICOM_PORT, "WRITE_FULL", 0);
636 return 0;
637 }
638
639 data_count = 0;
640 while ((port->state->xmit.head != temp_tail) &&
641 (data_count <= XMIT_BUFF_SZ)) {
642
643 ICOM_PORT->xmit_buf[data_count++] =
644 port->state->xmit.buf[temp_tail];
645
646 temp_tail++;
647 temp_tail &= (UART_XMIT_SIZE - 1);
648 }
649
650 if (data_count) {
651 ICOM_PORT->statStg->xmit[0].flags =
652 cpu_to_le16(SA_FLAGS_READY_TO_XMIT);
653 ICOM_PORT->statStg->xmit[0].leLength =
654 cpu_to_le16(data_count);
655 offset =
656 (unsigned long) &ICOM_PORT->statStg->xmit[0] -
657 (unsigned long) ICOM_PORT->statStg;
658 *ICOM_PORT->xmitRestart =
659 cpu_to_le32(ICOM_PORT->statStg_pci + offset);
660 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
661 writeb(cmdReg | CMD_XMIT_RCV_ENABLE,
662 &ICOM_PORT->dram->CmdReg);
663 writeb(START_XMIT, &ICOM_PORT->dram->StartXmitCmd);
664 trace(ICOM_PORT, "WRITE_START", data_count);
665 /* write flush */
666 readb(&ICOM_PORT->dram->StartXmitCmd);
667 }
668
669 return data_count;
670 }
671
672 static inline void check_modem_status(struct icom_port *icom_port)
673 {
674 static char old_status = 0;
675 char delta_status;
676 unsigned char status;
677
678 spin_lock(&icom_port->uart_port.lock);
679
680 /*modem input register */
681 status = readb(&icom_port->dram->isr);
682 trace(icom_port, "CHECK_MODEM", status);
683 delta_status = status ^ old_status;
684 if (delta_status) {
685 if (delta_status & ICOM_RI)
686 icom_port->uart_port.icount.rng++;
687 if (delta_status & ICOM_DSR)
688 icom_port->uart_port.icount.dsr++;
689 if (delta_status & ICOM_DCD)
690 uart_handle_dcd_change(&icom_port->uart_port,
691 delta_status & ICOM_DCD);
692 if (delta_status & ICOM_CTS)
693 uart_handle_cts_change(&icom_port->uart_port,
694 delta_status & ICOM_CTS);
695
696 wake_up_interruptible(&icom_port->uart_port.state->
697 port.delta_msr_wait);
698 old_status = status;
699 }
700 spin_unlock(&icom_port->uart_port.lock);
701 }
702
703 static void xmit_interrupt(u16 port_int_reg, struct icom_port *icom_port)
704 {
705 unsigned short int count;
706 int i;
707
708 if (port_int_reg & (INT_XMIT_COMPLETED)) {
709 trace(icom_port, "XMIT_COMPLETE", 0);
710
711 /* clear buffer in use bit */
712 icom_port->statStg->xmit[0].flags &=
713 cpu_to_le16(~SA_FLAGS_READY_TO_XMIT);
714
715 count = (unsigned short int)
716 cpu_to_le16(icom_port->statStg->xmit[0].leLength);
717 icom_port->uart_port.icount.tx += count;
718
719 for (i=0; i<count &&
720 !uart_circ_empty(&icom_port->uart_port.state->xmit); i++) {
721
722 icom_port->uart_port.state->xmit.tail++;
723 icom_port->uart_port.state->xmit.tail &=
724 (UART_XMIT_SIZE - 1);
725 }
726
727 if (!icom_write(&icom_port->uart_port))
728 /* activate write queue */
729 uart_write_wakeup(&icom_port->uart_port);
730 } else
731 trace(icom_port, "XMIT_DISABLED", 0);
732 }
733
734 static void recv_interrupt(u16 port_int_reg, struct icom_port *icom_port)
735 {
736 short int count, rcv_buff;
737 struct tty_port *port = &icom_port->uart_port.state->port;
738 unsigned short int status;
739 struct uart_icount *icount;
740 unsigned long offset;
741 unsigned char flag;
742
743 trace(icom_port, "RCV_COMPLETE", 0);
744 rcv_buff = icom_port->next_rcv;
745
746 status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags);
747 while (status & SA_FL_RCV_DONE) {
748 int first = -1;
749
750 trace(icom_port, "FID_STATUS", status);
751 count = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].leLength);
752
753 trace(icom_port, "RCV_COUNT", count);
754
755 trace(icom_port, "REAL_COUNT", count);
756
757 offset =
758 cpu_to_le32(icom_port->statStg->rcv[rcv_buff].leBuffer) -
759 icom_port->recv_buf_pci;
760
761 /* Block copy all but the last byte as this may have status */
762 if (count > 0) {
763 first = icom_port->recv_buf[offset];
764 tty_insert_flip_string(port, icom_port->recv_buf + offset, count - 1);
765 }
766
767 icount = &icom_port->uart_port.icount;
768 icount->rx += count;
769
770 /* Break detect logic */
771 if ((status & SA_FLAGS_FRAME_ERROR)
772 && first == 0) {
773 status &= ~SA_FLAGS_FRAME_ERROR;
774 status |= SA_FLAGS_BREAK_DET;
775 trace(icom_port, "BREAK_DET", 0);
776 }
777
778 flag = TTY_NORMAL;
779
780 if (status &
781 (SA_FLAGS_BREAK_DET | SA_FLAGS_PARITY_ERROR |
782 SA_FLAGS_FRAME_ERROR | SA_FLAGS_OVERRUN)) {
783
784 if (status & SA_FLAGS_BREAK_DET)
785 icount->brk++;
786 if (status & SA_FLAGS_PARITY_ERROR)
787 icount->parity++;
788 if (status & SA_FLAGS_FRAME_ERROR)
789 icount->frame++;
790 if (status & SA_FLAGS_OVERRUN)
791 icount->overrun++;
792
793 /*
794 * Now check to see if character should be
795 * ignored, and mask off conditions which
796 * should be ignored.
797 */
798 if (status & icom_port->ignore_status_mask) {
799 trace(icom_port, "IGNORE_CHAR", 0);
800 goto ignore_char;
801 }
802
803 status &= icom_port->read_status_mask;
804
805 if (status & SA_FLAGS_BREAK_DET) {
806 flag = TTY_BREAK;
807 } else if (status & SA_FLAGS_PARITY_ERROR) {
808 trace(icom_port, "PARITY_ERROR", 0);
809 flag = TTY_PARITY;
810 } else if (status & SA_FLAGS_FRAME_ERROR)
811 flag = TTY_FRAME;
812
813 }
814
815 tty_insert_flip_char(port, *(icom_port->recv_buf + offset + count - 1), flag);
816
817 if (status & SA_FLAGS_OVERRUN)
818 /*
819 * Overrun is special, since it's
820 * reported immediately, and doesn't
821 * affect the current character
822 */
823 tty_insert_flip_char(port, 0, TTY_OVERRUN);
824 ignore_char:
825 icom_port->statStg->rcv[rcv_buff].flags = 0;
826 icom_port->statStg->rcv[rcv_buff].leLength = 0;
827 icom_port->statStg->rcv[rcv_buff].WorkingLength =
828 (unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
829
830 rcv_buff++;
831 if (rcv_buff == NUM_RBUFFS)
832 rcv_buff = 0;
833
834 status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags);
835 }
836 icom_port->next_rcv = rcv_buff;
837 tty_flip_buffer_push(port);
838 }
839
840 static void process_interrupt(u16 port_int_reg,
841 struct icom_port *icom_port)
842 {
843
844 spin_lock(&icom_port->uart_port.lock);
845 trace(icom_port, "INTERRUPT", port_int_reg);
846
847 if (port_int_reg & (INT_XMIT_COMPLETED | INT_XMIT_DISABLED))
848 xmit_interrupt(port_int_reg, icom_port);
849
850 if (port_int_reg & INT_RCV_COMPLETED)
851 recv_interrupt(port_int_reg, icom_port);
852
853 spin_unlock(&icom_port->uart_port.lock);
854 }
855
856 static irqreturn_t icom_interrupt(int irq, void *dev_id)
857 {
858 void __iomem * int_reg;
859 u32 adapter_interrupts;
860 u16 port_int_reg;
861 struct icom_adapter *icom_adapter;
862 struct icom_port *icom_port;
863
864 /* find icom_port for this interrupt */
865 icom_adapter = (struct icom_adapter *) dev_id;
866
867 if (icom_adapter->version == ADAPTER_V2) {
868 int_reg = icom_adapter->base_addr + 0x8024;
869
870 adapter_interrupts = readl(int_reg);
871
872 if (adapter_interrupts & 0x00003FFF) {
873 /* port 2 interrupt, NOTE: for all ADAPTER_V2, port 2 will be active */
874 icom_port = &icom_adapter->port_info[2];
875 port_int_reg = (u16) adapter_interrupts;
876 process_interrupt(port_int_reg, icom_port);
877 check_modem_status(icom_port);
878 }
879 if (adapter_interrupts & 0x3FFF0000) {
880 /* port 3 interrupt */
881 icom_port = &icom_adapter->port_info[3];
882 if (icom_port->status == ICOM_PORT_ACTIVE) {
883 port_int_reg =
884 (u16) (adapter_interrupts >> 16);
885 process_interrupt(port_int_reg, icom_port);
886 check_modem_status(icom_port);
887 }
888 }
889
890 /* Clear out any pending interrupts */
891 writel(adapter_interrupts, int_reg);
892
893 int_reg = icom_adapter->base_addr + 0x8004;
894 } else {
895 int_reg = icom_adapter->base_addr + 0x4004;
896 }
897
898 adapter_interrupts = readl(int_reg);
899
900 if (adapter_interrupts & 0x00003FFF) {
901 /* port 0 interrupt, NOTE: for all adapters, port 0 will be active */
902 icom_port = &icom_adapter->port_info[0];
903 port_int_reg = (u16) adapter_interrupts;
904 process_interrupt(port_int_reg, icom_port);
905 check_modem_status(icom_port);
906 }
907 if (adapter_interrupts & 0x3FFF0000) {
908 /* port 1 interrupt */
909 icom_port = &icom_adapter->port_info[1];
910 if (icom_port->status == ICOM_PORT_ACTIVE) {
911 port_int_reg = (u16) (adapter_interrupts >> 16);
912 process_interrupt(port_int_reg, icom_port);
913 check_modem_status(icom_port);
914 }
915 }
916
917 /* Clear out any pending interrupts */
918 writel(adapter_interrupts, int_reg);
919
920 /* flush the write */
921 adapter_interrupts = readl(int_reg);
922
923 return IRQ_HANDLED;
924 }
925
926 /*
927 * ------------------------------------------------------------------
928 * Begin serial-core API
929 * ------------------------------------------------------------------
930 */
931 static unsigned int icom_tx_empty(struct uart_port *port)
932 {
933 int ret;
934 unsigned long flags;
935
936 spin_lock_irqsave(&port->lock, flags);
937 if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) &
938 SA_FLAGS_READY_TO_XMIT)
939 ret = TIOCSER_TEMT;
940 else
941 ret = 0;
942
943 spin_unlock_irqrestore(&port->lock, flags);
944 return ret;
945 }
946
947 static void icom_set_mctrl(struct uart_port *port, unsigned int mctrl)
948 {
949 unsigned char local_osr;
950
951 trace(ICOM_PORT, "SET_MODEM", 0);
952 local_osr = readb(&ICOM_PORT->dram->osr);
953
954 if (mctrl & TIOCM_RTS) {
955 trace(ICOM_PORT, "RAISE_RTS", 0);
956 local_osr |= ICOM_RTS;
957 } else {
958 trace(ICOM_PORT, "LOWER_RTS", 0);
959 local_osr &= ~ICOM_RTS;
960 }
961
962 if (mctrl & TIOCM_DTR) {
963 trace(ICOM_PORT, "RAISE_DTR", 0);
964 local_osr |= ICOM_DTR;
965 } else {
966 trace(ICOM_PORT, "LOWER_DTR", 0);
967 local_osr &= ~ICOM_DTR;
968 }
969
970 writeb(local_osr, &ICOM_PORT->dram->osr);
971 }
972
973 static unsigned int icom_get_mctrl(struct uart_port *port)
974 {
975 unsigned char status;
976 unsigned int result;
977
978 trace(ICOM_PORT, "GET_MODEM", 0);
979
980 status = readb(&ICOM_PORT->dram->isr);
981
982 result = ((status & ICOM_DCD) ? TIOCM_CAR : 0)
983 | ((status & ICOM_RI) ? TIOCM_RNG : 0)
984 | ((status & ICOM_DSR) ? TIOCM_DSR : 0)
985 | ((status & ICOM_CTS) ? TIOCM_CTS : 0);
986 return result;
987 }
988
989 static void icom_stop_tx(struct uart_port *port)
990 {
991 unsigned char cmdReg;
992
993 trace(ICOM_PORT, "STOP", 0);
994 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
995 writeb(cmdReg | CMD_HOLD_XMIT, &ICOM_PORT->dram->CmdReg);
996 }
997
998 static void icom_start_tx(struct uart_port *port)
999 {
1000 unsigned char cmdReg;
1001
1002 trace(ICOM_PORT, "START", 0);
1003 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1004 if ((cmdReg & CMD_HOLD_XMIT) == CMD_HOLD_XMIT)
1005 writeb(cmdReg & ~CMD_HOLD_XMIT,
1006 &ICOM_PORT->dram->CmdReg);
1007
1008 icom_write(port);
1009 }
1010
1011 static void icom_send_xchar(struct uart_port *port, char ch)
1012 {
1013 unsigned char xdata;
1014 int index;
1015 unsigned long flags;
1016
1017 trace(ICOM_PORT, "SEND_XCHAR", ch);
1018
1019 /* wait .1 sec to send char */
1020 for (index = 0; index < 10; index++) {
1021 spin_lock_irqsave(&port->lock, flags);
1022 xdata = readb(&ICOM_PORT->dram->xchar);
1023 if (xdata == 0x00) {
1024 trace(ICOM_PORT, "QUICK_WRITE", 0);
1025 writeb(ch, &ICOM_PORT->dram->xchar);
1026
1027 /* flush write operation */
1028 xdata = readb(&ICOM_PORT->dram->xchar);
1029 spin_unlock_irqrestore(&port->lock, flags);
1030 break;
1031 }
1032 spin_unlock_irqrestore(&port->lock, flags);
1033 msleep(10);
1034 }
1035 }
1036
1037 static void icom_stop_rx(struct uart_port *port)
1038 {
1039 unsigned char cmdReg;
1040
1041 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1042 writeb(cmdReg & ~CMD_RCV_ENABLE, &ICOM_PORT->dram->CmdReg);
1043 }
1044
1045 static void icom_enable_ms(struct uart_port *port)
1046 {
1047 /* no-op */
1048 }
1049
1050 static void icom_break(struct uart_port *port, int break_state)
1051 {
1052 unsigned char cmdReg;
1053 unsigned long flags;
1054
1055 spin_lock_irqsave(&port->lock, flags);
1056 trace(ICOM_PORT, "BREAK", 0);
1057 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1058 if (break_state == -1) {
1059 writeb(cmdReg | CMD_SND_BREAK, &ICOM_PORT->dram->CmdReg);
1060 } else {
1061 writeb(cmdReg & ~CMD_SND_BREAK, &ICOM_PORT->dram->CmdReg);
1062 }
1063 spin_unlock_irqrestore(&port->lock, flags);
1064 }
1065
1066 static int icom_open(struct uart_port *port)
1067 {
1068 int retval;
1069
1070 kref_get(&ICOM_PORT->adapter->kref);
1071 retval = startup(ICOM_PORT);
1072
1073 if (retval) {
1074 kref_put(&ICOM_PORT->adapter->kref, icom_kref_release);
1075 trace(ICOM_PORT, "STARTUP_ERROR", 0);
1076 return retval;
1077 }
1078
1079 return 0;
1080 }
1081
1082 static void icom_close(struct uart_port *port)
1083 {
1084 unsigned char cmdReg;
1085
1086 trace(ICOM_PORT, "CLOSE", 0);
1087
1088 /* stop receiver */
1089 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1090 writeb(cmdReg & (unsigned char) ~CMD_RCV_ENABLE,
1091 &ICOM_PORT->dram->CmdReg);
1092
1093 shutdown(ICOM_PORT);
1094
1095 kref_put(&ICOM_PORT->adapter->kref, icom_kref_release);
1096 }
1097
1098 static void icom_set_termios(struct uart_port *port,
1099 struct ktermios *termios,
1100 struct ktermios *old_termios)
1101 {
1102 int baud;
1103 unsigned cflag, iflag;
1104 char new_config2;
1105 char new_config3 = 0;
1106 char tmp_byte;
1107 int index;
1108 int rcv_buff, xmit_buff;
1109 unsigned long offset;
1110 unsigned long flags;
1111
1112 spin_lock_irqsave(&port->lock, flags);
1113 trace(ICOM_PORT, "CHANGE_SPEED", 0);
1114
1115 cflag = termios->c_cflag;
1116 iflag = termios->c_iflag;
1117
1118 new_config2 = ICOM_ACFG_DRIVE1;
1119
1120 /* byte size and parity */
1121 switch (cflag & CSIZE) {
1122 case CS5: /* 5 bits/char */
1123 new_config2 |= ICOM_ACFG_5BPC;
1124 break;
1125 case CS6: /* 6 bits/char */
1126 new_config2 |= ICOM_ACFG_6BPC;
1127 break;
1128 case CS7: /* 7 bits/char */
1129 new_config2 |= ICOM_ACFG_7BPC;
1130 break;
1131 case CS8: /* 8 bits/char */
1132 new_config2 |= ICOM_ACFG_8BPC;
1133 break;
1134 default:
1135 break;
1136 }
1137 if (cflag & CSTOPB) {
1138 /* 2 stop bits */
1139 new_config2 |= ICOM_ACFG_2STOP_BIT;
1140 }
1141 if (cflag & PARENB) {
1142 /* parity bit enabled */
1143 new_config2 |= ICOM_ACFG_PARITY_ENAB;
1144 trace(ICOM_PORT, "PARENB", 0);
1145 }
1146 if (cflag & PARODD) {
1147 /* odd parity */
1148 new_config2 |= ICOM_ACFG_PARITY_ODD;
1149 trace(ICOM_PORT, "PARODD", 0);
1150 }
1151
1152 /* Determine divisor based on baud rate */
1153 baud = uart_get_baud_rate(port, termios, old_termios,
1154 icom_acfg_baud[0],
1155 icom_acfg_baud[BAUD_TABLE_LIMIT]);
1156 if (!baud)
1157 baud = 9600; /* B0 transition handled in rs_set_termios */
1158
1159 for (index = 0; index < BAUD_TABLE_LIMIT; index++) {
1160 if (icom_acfg_baud[index] == baud) {
1161 new_config3 = index;
1162 break;
1163 }
1164 }
1165
1166 uart_update_timeout(port, cflag, baud);
1167
1168 /* CTS flow control flag and modem status interrupts */
1169 tmp_byte = readb(&(ICOM_PORT->dram->HDLCConfigReg));
1170 if (cflag & CRTSCTS)
1171 tmp_byte |= HDLC_HDW_FLOW;
1172 else
1173 tmp_byte &= ~HDLC_HDW_FLOW;
1174 writeb(tmp_byte, &(ICOM_PORT->dram->HDLCConfigReg));
1175
1176 /*
1177 * Set up parity check flag
1178 */
1179 ICOM_PORT->read_status_mask = SA_FLAGS_OVERRUN | SA_FL_RCV_DONE;
1180 if (iflag & INPCK)
1181 ICOM_PORT->read_status_mask |=
1182 SA_FLAGS_FRAME_ERROR | SA_FLAGS_PARITY_ERROR;
1183
1184 if ((iflag & BRKINT) || (iflag & PARMRK))
1185 ICOM_PORT->read_status_mask |= SA_FLAGS_BREAK_DET;
1186
1187 /*
1188 * Characters to ignore
1189 */
1190 ICOM_PORT->ignore_status_mask = 0;
1191 if (iflag & IGNPAR)
1192 ICOM_PORT->ignore_status_mask |=
1193 SA_FLAGS_PARITY_ERROR | SA_FLAGS_FRAME_ERROR;
1194 if (iflag & IGNBRK) {
1195 ICOM_PORT->ignore_status_mask |= SA_FLAGS_BREAK_DET;
1196 /*
1197 * If we're ignore parity and break indicators, ignore
1198 * overruns too. (For real raw support).
1199 */
1200 if (iflag & IGNPAR)
1201 ICOM_PORT->ignore_status_mask |= SA_FLAGS_OVERRUN;
1202 }
1203
1204 /*
1205 * !!! ignore all characters if CREAD is not set
1206 */
1207 if ((cflag & CREAD) == 0)
1208 ICOM_PORT->ignore_status_mask |= SA_FL_RCV_DONE;
1209
1210 /* Turn off Receiver to prepare for reset */
1211 writeb(CMD_RCV_DISABLE, &ICOM_PORT->dram->CmdReg);
1212
1213 for (index = 0; index < 10; index++) {
1214 if (readb(&ICOM_PORT->dram->PrevCmdReg) == 0x00) {
1215 break;
1216 }
1217 }
1218
1219 /* clear all current buffers of data */
1220 for (rcv_buff = 0; rcv_buff < NUM_RBUFFS; rcv_buff++) {
1221 ICOM_PORT->statStg->rcv[rcv_buff].flags = 0;
1222 ICOM_PORT->statStg->rcv[rcv_buff].leLength = 0;
1223 ICOM_PORT->statStg->rcv[rcv_buff].WorkingLength =
1224 (unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
1225 }
1226
1227 for (xmit_buff = 0; xmit_buff < NUM_XBUFFS; xmit_buff++) {
1228 ICOM_PORT->statStg->xmit[xmit_buff].flags = 0;
1229 }
1230
1231 /* activate changes and start xmit and receiver here */
1232 /* Enable the receiver */
1233 writeb(new_config3, &(ICOM_PORT->dram->async_config3));
1234 writeb(new_config2, &(ICOM_PORT->dram->async_config2));
1235 tmp_byte = readb(&(ICOM_PORT->dram->HDLCConfigReg));
1236 tmp_byte |= HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL;
1237 writeb(tmp_byte, &(ICOM_PORT->dram->HDLCConfigReg));
1238 writeb(0x04, &(ICOM_PORT->dram->FlagFillIdleTimer)); /* 0.5 seconds */
1239 writeb(0xFF, &(ICOM_PORT->dram->ier)); /* enable modem signal interrupts */
1240
1241 /* reset processor */
1242 writeb(CMD_RESTART, &ICOM_PORT->dram->CmdReg);
1243
1244 for (index = 0; index < 10; index++) {
1245 if (readb(&ICOM_PORT->dram->CmdReg) == 0x00) {
1246 break;
1247 }
1248 }
1249
1250 /* Enable Transmitter and Receiver */
1251 offset =
1252 (unsigned long) &ICOM_PORT->statStg->rcv[0] -
1253 (unsigned long) ICOM_PORT->statStg;
1254 writel(ICOM_PORT->statStg_pci + offset,
1255 &ICOM_PORT->dram->RcvStatusAddr);
1256 ICOM_PORT->next_rcv = 0;
1257 ICOM_PORT->put_length = 0;
1258 *ICOM_PORT->xmitRestart = 0;
1259 writel(ICOM_PORT->xmitRestart_pci,
1260 &ICOM_PORT->dram->XmitStatusAddr);
1261 trace(ICOM_PORT, "XR_ENAB", 0);
1262 writeb(CMD_XMIT_RCV_ENABLE, &ICOM_PORT->dram->CmdReg);
1263
1264 spin_unlock_irqrestore(&port->lock, flags);
1265 }
1266
1267 static const char *icom_type(struct uart_port *port)
1268 {
1269 return "icom";
1270 }
1271
1272 static void icom_release_port(struct uart_port *port)
1273 {
1274 }
1275
1276 static int icom_request_port(struct uart_port *port)
1277 {
1278 return 0;
1279 }
1280
1281 static void icom_config_port(struct uart_port *port, int flags)
1282 {
1283 port->type = PORT_ICOM;
1284 }
1285
1286 static struct uart_ops icom_ops = {
1287 .tx_empty = icom_tx_empty,
1288 .set_mctrl = icom_set_mctrl,
1289 .get_mctrl = icom_get_mctrl,
1290 .stop_tx = icom_stop_tx,
1291 .start_tx = icom_start_tx,
1292 .send_xchar = icom_send_xchar,
1293 .stop_rx = icom_stop_rx,
1294 .enable_ms = icom_enable_ms,
1295 .break_ctl = icom_break,
1296 .startup = icom_open,
1297 .shutdown = icom_close,
1298 .set_termios = icom_set_termios,
1299 .type = icom_type,
1300 .release_port = icom_release_port,
1301 .request_port = icom_request_port,
1302 .config_port = icom_config_port,
1303 };
1304
1305 #define ICOM_CONSOLE NULL
1306
1307 static struct uart_driver icom_uart_driver = {
1308 .owner = THIS_MODULE,
1309 .driver_name = ICOM_DRIVER_NAME,
1310 .dev_name = "ttyA",
1311 .major = ICOM_MAJOR,
1312 .minor = ICOM_MINOR_START,
1313 .nr = NR_PORTS,
1314 .cons = ICOM_CONSOLE,
1315 };
1316
1317 static int icom_init_ports(struct icom_adapter *icom_adapter)
1318 {
1319 u32 subsystem_id = icom_adapter->subsystem_id;
1320 int i;
1321 struct icom_port *icom_port;
1322
1323 if (icom_adapter->version == ADAPTER_V1) {
1324 icom_adapter->numb_ports = 2;
1325
1326 for (i = 0; i < 2; i++) {
1327 icom_port = &icom_adapter->port_info[i];
1328 icom_port->port = i;
1329 icom_port->status = ICOM_PORT_ACTIVE;
1330 icom_port->imbed_modem = ICOM_UNKNOWN;
1331 }
1332 } else {
1333 if (subsystem_id == PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL) {
1334 icom_adapter->numb_ports = 4;
1335
1336 for (i = 0; i < 4; i++) {
1337 icom_port = &icom_adapter->port_info[i];
1338
1339 icom_port->port = i;
1340 icom_port->status = ICOM_PORT_ACTIVE;
1341 icom_port->imbed_modem = ICOM_IMBED_MODEM;
1342 }
1343 } else {
1344 icom_adapter->numb_ports = 4;
1345
1346 icom_adapter->port_info[0].port = 0;
1347 icom_adapter->port_info[0].status = ICOM_PORT_ACTIVE;
1348
1349 if (subsystem_id ==
1350 PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM) {
1351 icom_adapter->port_info[0].imbed_modem = ICOM_IMBED_MODEM;
1352 } else {
1353 icom_adapter->port_info[0].imbed_modem = ICOM_RVX;
1354 }
1355
1356 icom_adapter->port_info[1].status = ICOM_PORT_OFF;
1357
1358 icom_adapter->port_info[2].port = 2;
1359 icom_adapter->port_info[2].status = ICOM_PORT_ACTIVE;
1360 icom_adapter->port_info[2].imbed_modem = ICOM_RVX;
1361 icom_adapter->port_info[3].status = ICOM_PORT_OFF;
1362 }
1363 }
1364
1365 return 0;
1366 }
1367
1368 static void icom_port_active(struct icom_port *icom_port, struct icom_adapter *icom_adapter, int port_num)
1369 {
1370 if (icom_adapter->version == ADAPTER_V1) {
1371 icom_port->global_reg = icom_adapter->base_addr + 0x4000;
1372 icom_port->int_reg = icom_adapter->base_addr +
1373 0x4004 + 2 - 2 * port_num;
1374 } else {
1375 icom_port->global_reg = icom_adapter->base_addr + 0x8000;
1376 if (icom_port->port < 2)
1377 icom_port->int_reg = icom_adapter->base_addr +
1378 0x8004 + 2 - 2 * icom_port->port;
1379 else
1380 icom_port->int_reg = icom_adapter->base_addr +
1381 0x8024 + 2 - 2 * (icom_port->port - 2);
1382 }
1383 }
1384 static int icom_load_ports(struct icom_adapter *icom_adapter)
1385 {
1386 struct icom_port *icom_port;
1387 int port_num;
1388
1389 for (port_num = 0; port_num < icom_adapter->numb_ports; port_num++) {
1390
1391 icom_port = &icom_adapter->port_info[port_num];
1392
1393 if (icom_port->status == ICOM_PORT_ACTIVE) {
1394 icom_port_active(icom_port, icom_adapter, port_num);
1395 icom_port->dram = icom_adapter->base_addr +
1396 0x2000 * icom_port->port;
1397
1398 icom_port->adapter = icom_adapter;
1399
1400 /* get port memory */
1401 if (get_port_memory(icom_port) != 0) {
1402 dev_err(&icom_port->adapter->pci_dev->dev,
1403 "Memory allocation for port FAILED\n");
1404 }
1405 }
1406 }
1407 return 0;
1408 }
1409
1410 static int icom_alloc_adapter(struct icom_adapter
1411 **icom_adapter_ref)
1412 {
1413 int adapter_count = 0;
1414 struct icom_adapter *icom_adapter;
1415 struct icom_adapter *cur_adapter_entry;
1416 struct list_head *tmp;
1417
1418 icom_adapter = kzalloc(sizeof(struct icom_adapter), GFP_KERNEL);
1419
1420 if (!icom_adapter) {
1421 return -ENOMEM;
1422 }
1423
1424 list_for_each(tmp, &icom_adapter_head) {
1425 cur_adapter_entry =
1426 list_entry(tmp, struct icom_adapter,
1427 icom_adapter_entry);
1428 if (cur_adapter_entry->index != adapter_count) {
1429 break;
1430 }
1431 adapter_count++;
1432 }
1433
1434 icom_adapter->index = adapter_count;
1435 list_add_tail(&icom_adapter->icom_adapter_entry, tmp);
1436
1437 *icom_adapter_ref = icom_adapter;
1438 return 0;
1439 }
1440
1441 static void icom_free_adapter(struct icom_adapter *icom_adapter)
1442 {
1443 list_del(&icom_adapter->icom_adapter_entry);
1444 kfree(icom_adapter);
1445 }
1446
1447 static void icom_remove_adapter(struct icom_adapter *icom_adapter)
1448 {
1449 struct icom_port *icom_port;
1450 int index;
1451
1452 for (index = 0; index < icom_adapter->numb_ports; index++) {
1453 icom_port = &icom_adapter->port_info[index];
1454
1455 if (icom_port->status == ICOM_PORT_ACTIVE) {
1456 dev_info(&icom_adapter->pci_dev->dev,
1457 "Device removed\n");
1458
1459 uart_remove_one_port(&icom_uart_driver,
1460 &icom_port->uart_port);
1461
1462 /* be sure that DTR and RTS are dropped */
1463 writeb(0x00, &icom_port->dram->osr);
1464
1465 /* Wait 0.1 Sec for simple Init to complete */
1466 msleep(100);
1467
1468 /* Stop proccessor */
1469 stop_processor(icom_port);
1470
1471 free_port_memory(icom_port);
1472 }
1473 }
1474
1475 free_irq(icom_adapter->pci_dev->irq, (void *) icom_adapter);
1476 iounmap(icom_adapter->base_addr);
1477 pci_release_regions(icom_adapter->pci_dev);
1478 icom_free_adapter(icom_adapter);
1479 }
1480
1481 static void icom_kref_release(struct kref *kref)
1482 {
1483 struct icom_adapter *icom_adapter;
1484
1485 icom_adapter = to_icom_adapter(kref);
1486 icom_remove_adapter(icom_adapter);
1487 }
1488
1489 static int icom_probe(struct pci_dev *dev,
1490 const struct pci_device_id *ent)
1491 {
1492 int index;
1493 unsigned int command_reg;
1494 int retval;
1495 struct icom_adapter *icom_adapter;
1496 struct icom_port *icom_port;
1497
1498 retval = pci_enable_device(dev);
1499 if (retval) {
1500 dev_err(&dev->dev, "Device enable FAILED\n");
1501 return retval;
1502 }
1503
1504 if ( (retval = pci_request_regions(dev, "icom"))) {
1505 dev_err(&dev->dev, "pci_request_regions FAILED\n");
1506 pci_disable_device(dev);
1507 return retval;
1508 }
1509
1510 pci_set_master(dev);
1511
1512 if ( (retval = pci_read_config_dword(dev, PCI_COMMAND, &command_reg))) {
1513 dev_err(&dev->dev, "PCI Config read FAILED\n");
1514 return retval;
1515 }
1516
1517 pci_write_config_dword(dev, PCI_COMMAND,
1518 command_reg | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
1519 | PCI_COMMAND_PARITY | PCI_COMMAND_SERR);
1520
1521 if (ent->driver_data == ADAPTER_V1) {
1522 pci_write_config_dword(dev, 0x44, 0x8300830A);
1523 } else {
1524 pci_write_config_dword(dev, 0x44, 0x42004200);
1525 pci_write_config_dword(dev, 0x48, 0x42004200);
1526 }
1527
1528
1529 retval = icom_alloc_adapter(&icom_adapter);
1530 if (retval) {
1531 dev_err(&dev->dev, "icom_alloc_adapter FAILED\n");
1532 retval = -EIO;
1533 goto probe_exit0;
1534 }
1535
1536 icom_adapter->base_addr_pci = pci_resource_start(dev, 0);
1537 icom_adapter->pci_dev = dev;
1538 icom_adapter->version = ent->driver_data;
1539 icom_adapter->subsystem_id = ent->subdevice;
1540
1541
1542 retval = icom_init_ports(icom_adapter);
1543 if (retval) {
1544 dev_err(&dev->dev, "Port configuration failed\n");
1545 goto probe_exit1;
1546 }
1547
1548 icom_adapter->base_addr = pci_ioremap_bar(dev, 0);
1549
1550 if (!icom_adapter->base_addr)
1551 goto probe_exit1;
1552
1553 /* save off irq and request irq line */
1554 if ( (retval = request_irq(dev->irq, icom_interrupt,
1555 IRQF_SHARED, ICOM_DRIVER_NAME,
1556 (void *) icom_adapter))) {
1557 goto probe_exit2;
1558 }
1559
1560 retval = icom_load_ports(icom_adapter);
1561
1562 for (index = 0; index < icom_adapter->numb_ports; index++) {
1563 icom_port = &icom_adapter->port_info[index];
1564
1565 if (icom_port->status == ICOM_PORT_ACTIVE) {
1566 icom_port->uart_port.irq = icom_port->adapter->pci_dev->irq;
1567 icom_port->uart_port.type = PORT_ICOM;
1568 icom_port->uart_port.iotype = UPIO_MEM;
1569 icom_port->uart_port.membase =
1570 (char *) icom_adapter->base_addr_pci;
1571 icom_port->uart_port.fifosize = 16;
1572 icom_port->uart_port.ops = &icom_ops;
1573 icom_port->uart_port.line =
1574 icom_port->port + icom_adapter->index * 4;
1575 if (uart_add_one_port (&icom_uart_driver, &icom_port->uart_port)) {
1576 icom_port->status = ICOM_PORT_OFF;
1577 dev_err(&dev->dev, "Device add failed\n");
1578 } else
1579 dev_info(&dev->dev, "Device added\n");
1580 }
1581 }
1582
1583 kref_init(&icom_adapter->kref);
1584 return 0;
1585
1586 probe_exit2:
1587 iounmap(icom_adapter->base_addr);
1588 probe_exit1:
1589 icom_free_adapter(icom_adapter);
1590
1591 probe_exit0:
1592 pci_release_regions(dev);
1593 pci_disable_device(dev);
1594
1595 return retval;
1596 }
1597
1598 static void icom_remove(struct pci_dev *dev)
1599 {
1600 struct icom_adapter *icom_adapter;
1601 struct list_head *tmp;
1602
1603 list_for_each(tmp, &icom_adapter_head) {
1604 icom_adapter = list_entry(tmp, struct icom_adapter,
1605 icom_adapter_entry);
1606 if (icom_adapter->pci_dev == dev) {
1607 kref_put(&icom_adapter->kref, icom_kref_release);
1608 return;
1609 }
1610 }
1611
1612 dev_err(&dev->dev, "Unable to find device to remove\n");
1613 }
1614
1615 static struct pci_driver icom_pci_driver = {
1616 .name = ICOM_DRIVER_NAME,
1617 .id_table = icom_pci_table,
1618 .probe = icom_probe,
1619 .remove = icom_remove,
1620 };
1621
1622 static int __init icom_init(void)
1623 {
1624 int ret;
1625
1626 spin_lock_init(&icom_lock);
1627
1628 ret = uart_register_driver(&icom_uart_driver);
1629 if (ret)
1630 return ret;
1631
1632 ret = pci_register_driver(&icom_pci_driver);
1633
1634 if (ret < 0)
1635 uart_unregister_driver(&icom_uart_driver);
1636
1637 return ret;
1638 }
1639
1640 static void __exit icom_exit(void)
1641 {
1642 pci_unregister_driver(&icom_pci_driver);
1643 uart_unregister_driver(&icom_uart_driver);
1644 }
1645
1646 module_init(icom_init);
1647 module_exit(icom_exit);
1648
1649 MODULE_AUTHOR("Michael Anderson <mjanders@us.ibm.com>");
1650 MODULE_DESCRIPTION("IBM iSeries Serial IOA driver");
1651 MODULE_SUPPORTED_DEVICE
1652 ("IBM iSeries 2745, 2771, 2772, 2742, 2793 and 2805 Communications adapters");
1653 MODULE_LICENSE("GPL");
1654 MODULE_FIRMWARE("icom_call_setup.bin");
1655 MODULE_FIRMWARE("icom_res_dce.bin");
1656 MODULE_FIRMWARE("icom_asc.bin");
CRIS linux kernel tree