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IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
[mirror_ubuntu-jammy-kernel.git] / drivers / serial / icom.c
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1da177e4
LT		 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>
1da177e4
LT		 27#include <linux/kernel.h>
28#include <linux/errno.h>
29#include <linux/signal.h>
30#include <linux/sched.h>
31#include <linux/timer.h>
32#include <linux/interrupt.h>
33#include <linux/tty.h>
34#include <linux/termios.h>
35#include <linux/fs.h>
36#include <linux/tty_flip.h>
37#include <linux/serial.h>
38#include <linux/serial_reg.h>
39#include <linux/major.h>
40#include <linux/string.h>
41#include <linux/fcntl.h>
42#include <linux/ptrace.h>
43#include <linux/ioport.h>
44#include <linux/mm.h>
45#include <linux/slab.h>
46#include <linux/init.h>
47#include <linux/delay.h>
48#include <linux/pci.h>
49#include <linux/vmalloc.h>
50#include <linux/smp.h>
51#include <linux/smp_lock.h>
52#include <linux/spinlock.h>
53#include <linux/kobject.h>
54#include <linux/firmware.h>
55#include <linux/bitops.h>
56
57#include <asm/system.h>
1da177e4
LT		 58#include <asm/io.h>
59#include <asm/irq.h>
60#include <asm/uaccess.h>
61
62#include "icom.h"
63
64/*#define ICOM_TRACE enable port trace capabilities */
65
66#define ICOM_DRIVER_NAME "icom"
67#define ICOM_VERSION_STR "1.3.1"
68#define NR_PORTS 128
69#define ICOM_PORT ((struct icom_port *)port)
70#define to_icom_adapter(d) container_of(d, struct icom_adapter, kobj)
71
72static const struct pci_device_id icom_pci_table[] = {
73 {
74 .vendor = PCI_VENDOR_ID_IBM,
75 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_1,
76 .subvendor = PCI_ANY_ID,
77 .subdevice = PCI_ANY_ID,
78 .driver_data = ADAPTER_V1,
79 },
80 {
81 .vendor = PCI_VENDOR_ID_IBM,
82 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
83 .subvendor = PCI_VENDOR_ID_IBM,
84 .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_TWO_PORTS_RVX,
85 .driver_data = ADAPTER_V2,
86 },
87 {
88 .vendor = PCI_VENDOR_ID_IBM,
89 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
90 .subvendor = PCI_VENDOR_ID_IBM,
91 .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM,
92 .driver_data = ADAPTER_V2,
93 },
94 {
95 .vendor = PCI_VENDOR_ID_IBM,
96 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
97 .subvendor = PCI_VENDOR_ID_IBM,
98 .subdevice = PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL,
99 .driver_data = ADAPTER_V2,
100 },
101 {}
102};
103
104struct lookup_proc_table start_proc[4] = {
105 {NULL, ICOM_CONTROL_START_A},
106 {NULL, ICOM_CONTROL_START_B},
107 {NULL, ICOM_CONTROL_START_C},
108 {NULL, ICOM_CONTROL_START_D}
109};
110
111
112struct lookup_proc_table stop_proc[4] = {
113 {NULL, ICOM_CONTROL_STOP_A},
114 {NULL, ICOM_CONTROL_STOP_B},
115 {NULL, ICOM_CONTROL_STOP_C},
116 {NULL, ICOM_CONTROL_STOP_D}
117};
118
119struct lookup_int_table int_mask_tbl[4] = {
120 {NULL, ICOM_INT_MASK_PRC_A},
121 {NULL, ICOM_INT_MASK_PRC_B},
122 {NULL, ICOM_INT_MASK_PRC_C},
123 {NULL, ICOM_INT_MASK_PRC_D},
124};
125
126
127MODULE_DEVICE_TABLE(pci, icom_pci_table);
128
129static LIST_HEAD(icom_adapter_head);
130
131/* spinlock for adapter initialization and changing adapter operations */
132static spinlock_t icom_lock;
133
134#ifdef ICOM_TRACE
135static inline void trace(struct icom_port *, char *, unsigned long) {};
136#else
137static inline void trace(struct icom_port *icom_port, char *trace_pt, unsigned long trace_data) {};
138#endif
139
140static void free_port_memory(struct icom_port *icom_port)
141{
142 struct pci_dev *dev = icom_port->adapter->pci_dev;
143
144 trace(icom_port, "RET_PORT_MEM", 0);
145 if (icom_port->recv_buf) {
146 pci_free_consistent(dev, 4096, icom_port->recv_buf,
147 icom_port->recv_buf_pci);
148 icom_port->recv_buf = NULL;
149 }
150 if (icom_port->xmit_buf) {
151 pci_free_consistent(dev, 4096, icom_port->xmit_buf,
152 icom_port->xmit_buf_pci);
153 icom_port->xmit_buf = NULL;
154 }
155 if (icom_port->statStg) {
156 pci_free_consistent(dev, 4096, icom_port->statStg,
157 icom_port->statStg_pci);
158 icom_port->statStg = NULL;
159 }
160
161 if (icom_port->xmitRestart) {
162 pci_free_consistent(dev, 4096, icom_port->xmitRestart,
163 icom_port->xmitRestart_pci);
164 icom_port->xmitRestart = NULL;
165 }
166}
167
168static int __init get_port_memory(struct icom_port *icom_port)
169{
170 int index;
171 unsigned long stgAddr;
172 unsigned long startStgAddr;
173 unsigned long offset;
174 struct pci_dev *dev = icom_port->adapter->pci_dev;
175
176 icom_port->xmit_buf =
177 pci_alloc_consistent(dev, 4096, &icom_port->xmit_buf_pci);
178 if (!icom_port->xmit_buf) {
179 dev_err(&dev->dev, "Can not allocate Transmit buffer\n");
180 return -ENOMEM;
181 }
182
183 trace(icom_port, "GET_PORT_MEM",
184 (unsigned long) icom_port->xmit_buf);
185
186 icom_port->recv_buf =
187 pci_alloc_consistent(dev, 4096, &icom_port->recv_buf_pci);
188 if (!icom_port->recv_buf) {
189 dev_err(&dev->dev, "Can not allocate Receive buffer\n");
190 free_port_memory(icom_port);
191 return -ENOMEM;
192 }
193 trace(icom_port, "GET_PORT_MEM",
194 (unsigned long) icom_port->recv_buf);
195
196 icom_port->statStg =
197 pci_alloc_consistent(dev, 4096, &icom_port->statStg_pci);
198 if (!icom_port->statStg) {
199 dev_err(&dev->dev, "Can not allocate Status buffer\n");
200 free_port_memory(icom_port);
201 return -ENOMEM;
202 }
203 trace(icom_port, "GET_PORT_MEM",
204 (unsigned long) icom_port->statStg);
205
206 icom_port->xmitRestart =
207 pci_alloc_consistent(dev, 4096, &icom_port->xmitRestart_pci);
208 if (!icom_port->xmitRestart) {
209 dev_err(&dev->dev,
210 "Can not allocate xmit Restart buffer\n");
211 free_port_memory(icom_port);
212 return -ENOMEM;
213 }
214
215 memset(icom_port->statStg, 0, 4096);
216
217 /* FODs: Frame Out Descriptor Queue, this is a FIFO queue that
218 indicates that frames are to be transmitted
219 */
220
221 stgAddr = (unsigned long) icom_port->statStg;
222 for (index = 0; index < NUM_XBUFFS; index++) {
223 trace(icom_port, "FOD_ADDR", stgAddr);
224 stgAddr = stgAddr + sizeof(icom_port->statStg->xmit[0]);
225 if (index < (NUM_XBUFFS - 1)) {
226 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
227 icom_port->statStg->xmit[index].leLengthASD =
228 (unsigned short int) cpu_to_le16(XMIT_BUFF_SZ);
229 trace(icom_port, "FOD_ADDR", stgAddr);
230 trace(icom_port, "FOD_XBUFF",
231 (unsigned long) icom_port->xmit_buf);
232 icom_port->statStg->xmit[index].leBuffer =
233 cpu_to_le32(icom_port->xmit_buf_pci);
234 } else if (index == (NUM_XBUFFS - 1)) {
235 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
236 icom_port->statStg->xmit[index].leLengthASD =
237 (unsigned short int) cpu_to_le16(XMIT_BUFF_SZ);
238 trace(icom_port, "FOD_XBUFF",
239 (unsigned long) icom_port->xmit_buf);
240 icom_port->statStg->xmit[index].leBuffer =
241 cpu_to_le32(icom_port->xmit_buf_pci);
242 } else {
243 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
244 }
245 }
246 /* FIDs */
247 startStgAddr = stgAddr;
248
249 /* fill in every entry, even if no buffer */
250 for (index = 0; index < NUM_RBUFFS; index++) {
251 trace(icom_port, "FID_ADDR", stgAddr);
252 stgAddr = stgAddr + sizeof(icom_port->statStg->rcv[0]);
253 icom_port->statStg->rcv[index].leLength = 0;
254 icom_port->statStg->rcv[index].WorkingLength =
255 (unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
256 if (index < (NUM_RBUFFS - 1) ) {
257 offset = stgAddr - (unsigned long) icom_port->statStg;
258 icom_port->statStg->rcv[index].leNext =
259 cpu_to_le32(icom_port-> statStg_pci + offset);
260 trace(icom_port, "FID_RBUFF",
261 (unsigned long) icom_port->recv_buf);
262 icom_port->statStg->rcv[index].leBuffer =
263 cpu_to_le32(icom_port->recv_buf_pci);
264 } else if (index == (NUM_RBUFFS -1) ) {
265 offset = startStgAddr - (unsigned long) icom_port->statStg;
266 icom_port->statStg->rcv[index].leNext =
267 cpu_to_le32(icom_port-> statStg_pci + offset);
268 trace(icom_port, "FID_RBUFF",
269 (unsigned long) icom_port->recv_buf + 2048);
270 icom_port->statStg->rcv[index].leBuffer =
271 cpu_to_le32(icom_port->recv_buf_pci + 2048);
272 } else {
273 icom_port->statStg->rcv[index].leNext = 0;
274 icom_port->statStg->rcv[index].leBuffer = 0;
275 }
276 }
277
278 return 0;
279}
280
281static void stop_processor(struct icom_port *icom_port)
282{
283 unsigned long temp;
284 unsigned long flags;
285 int port;
286
287 spin_lock_irqsave(&icom_lock, flags);
288
289 port = icom_port->port;
290 if (port == 0 || port == 1)
291 stop_proc[port].global_control_reg = &icom_port->global_reg->control;
292 else
293 stop_proc[port].global_control_reg = &icom_port->global_reg->control_2;
294
295
296 if (port < 4) {
297 temp = readl(stop_proc[port].global_control_reg);
298 temp =
299 (temp & ~start_proc[port].processor_id) | stop_proc[port].processor_id;
300 writel(temp, stop_proc[port].global_control_reg);
301
302 /* write flush */
303 readl(stop_proc[port].global_control_reg);
304 } else {
305 dev_err(&icom_port->adapter->pci_dev->dev,
306 "Invalid port assignment\n");
307 }
308
309 spin_unlock_irqrestore(&icom_lock, flags);
310}
311
312static void start_processor(struct icom_port *icom_port)
313{
314 unsigned long temp;
315 unsigned long flags;
316 int port;
317
318 spin_lock_irqsave(&icom_lock, flags);
319
320 port = icom_port->port;
321 if (port == 0 || port == 1)
322 start_proc[port].global_control_reg = &icom_port->global_reg->control;
323 else
324 start_proc[port].global_control_reg = &icom_port->global_reg->control_2;
325 if (port < 4) {
326 temp = readl(start_proc[port].global_control_reg);
327 temp =
328 (temp & ~stop_proc[port].processor_id) | start_proc[port].processor_id;
329 writel(temp, start_proc[port].global_control_reg);
330
331 /* write flush */
332 readl(start_proc[port].global_control_reg);
333 } else {
334 dev_err(&icom_port->adapter->pci_dev->dev,
335 "Invalid port assignment\n");
336 }
337
338 spin_unlock_irqrestore(&icom_lock, flags);
339}
340
341static void load_code(struct icom_port *icom_port)
342{
343 const struct firmware *fw;
344 char __iomem *iram_ptr;
345 int index;
346 int status = 0;
347 void __iomem *dram_ptr = icom_port->dram;
348 dma_addr_t temp_pci;
349 unsigned char *new_page = NULL;
350 unsigned char cable_id = NO_CABLE;
351 struct pci_dev *dev = icom_port->adapter->pci_dev;
352
353 /* Clear out any pending interrupts */
354 writew(0x3FFF, icom_port->int_reg);
355
356 trace(icom_port, "CLEAR_INTERRUPTS", 0);
357
358 /* Stop processor */
359 stop_processor(icom_port);
360
361 /* Zero out DRAM */
362 memset_io(dram_ptr, 0, 512);
363
364 /* Load Call Setup into Adapter */
365 if (request_firmware(&fw, "icom_call_setup.bin", &dev->dev) < 0) {
366 dev_err(&dev->dev,"Unable to load icom_call_setup.bin firmware image\n");
367 status = -1;
368 goto load_code_exit;
369 }
370
371 if (fw->size > ICOM_DCE_IRAM_OFFSET) {
372 dev_err(&dev->dev, "Invalid firmware image for icom_call_setup.bin found.\n");
373 release_firmware(fw);
374 status = -1;
375 goto load_code_exit;
376 }
377
378 iram_ptr = (char __iomem *)icom_port->dram + ICOM_IRAM_OFFSET;
379 for (index = 0; index < fw->size; index++)
380 writeb(fw->data[index], &iram_ptr[index]);
381
382 release_firmware(fw);
383
384 /* Load Resident DCE portion of Adapter */
385 if (request_firmware(&fw, "icom_res_dce.bin", &dev->dev) < 0) {
386 dev_err(&dev->dev,"Unable to load icom_res_dce.bin firmware image\n");
387 status = -1;
388 goto load_code_exit;
389 }
390
391 if (fw->size > ICOM_IRAM_SIZE) {
392 dev_err(&dev->dev, "Invalid firmware image for icom_res_dce.bin found.\n");
393 release_firmware(fw);
394 status = -1;
395 goto load_code_exit;
396 }
397
398 iram_ptr = (char __iomem *) icom_port->dram + ICOM_IRAM_OFFSET;
399 for (index = ICOM_DCE_IRAM_OFFSET; index < fw->size; index++)
400 writeb(fw->data[index], &iram_ptr[index]);
401
402 release_firmware(fw);
403
404 /* Set Hardware level */
405 if ((icom_port->adapter->version | ADAPTER_V2) == ADAPTER_V2)
406 writeb(V2_HARDWARE, &(icom_port->dram->misc_flags));
407
408 /* Start the processor in Adapter */
409 start_processor(icom_port);
410
411 writeb((HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL),
412 &(icom_port->dram->HDLCConfigReg));
413 writeb(0x04, &(icom_port->dram->FlagFillIdleTimer)); /* 0.5 seconds */
414 writeb(0x00, &(icom_port->dram->CmdReg));
415 writeb(0x10, &(icom_port->dram->async_config3));
416 writeb((ICOM_ACFG_DRIVE1 | ICOM_ACFG_NO_PARITY | ICOM_ACFG_8BPC |
417 ICOM_ACFG_1STOP_BIT), &(icom_port->dram->async_config2));
418
419 /*Set up data in icom DRAM to indicate where personality
420 *code is located and its length.
421 */
422 new_page = pci_alloc_consistent(dev, 4096, &temp_pci);
423
424 if (!new_page) {
425 dev_err(&dev->dev, "Can not allocate DMA buffer\n");
426 status = -1;
427 goto load_code_exit;
428 }
429
430 if (request_firmware(&fw, "icom_asc.bin", &dev->dev) < 0) {
431 dev_err(&dev->dev,"Unable to load icom_asc.bin firmware image\n");
432 status = -1;
433 goto load_code_exit;
434 }
435
436 if (fw->size > ICOM_DCE_IRAM_OFFSET) {
437 dev_err(&dev->dev, "Invalid firmware image for icom_asc.bin found.\n");
438 release_firmware(fw);
439 status = -1;
440 goto load_code_exit;
441 }
442
443 for (index = 0; index < fw->size; index++)
444 new_page[index] = fw->data[index];
445
446 release_firmware(fw);
447
448 writeb((char) ((fw->size + 16)/16), &icom_port->dram->mac_length);
449 writel(temp_pci, &icom_port->dram->mac_load_addr);
450
451 /*Setting the syncReg to 0x80 causes adapter to start downloading
452 the personality code into adapter instruction RAM.
453 Once code is loaded, it will begin executing and, based on
454 information provided above, will start DMAing data from
455 shared memory to adapter DRAM.
456 */
457 /* the wait loop below verifies this write operation has been done
458 and processed
459 */
460 writeb(START_DOWNLOAD, &icom_port->dram->sync);
461
462 /* Wait max 1 Sec for data download and processor to start */
463 for (index = 0; index < 10; index++) {
464 msleep(100);
465 if (readb(&icom_port->dram->misc_flags) & ICOM_HDW_ACTIVE)
466 break;
467 }
468
469 if (index == 10)
470 status = -1;
471
472 /*
473 * check Cable ID
474 */
475 cable_id = readb(&icom_port->dram->cable_id);
476
477 if (cable_id & ICOM_CABLE_ID_VALID) {
478 /* Get cable ID into the lower 4 bits (standard form) */
479 cable_id = (cable_id & ICOM_CABLE_ID_MASK) >> 4;
480 icom_port->cable_id = cable_id;
481 } else {
482 dev_err(&dev->dev,"Invalid or no cable attached\n");
483 icom_port->cable_id = NO_CABLE;
484 }
485
486 load_code_exit:
487
488 if (status != 0) {
489 /* Clear out any pending interrupts */
490 writew(0x3FFF, icom_port->int_reg);
491
492 /* Turn off port */
493 writeb(ICOM_DISABLE, &(icom_port->dram->disable));
494
495 /* Stop processor */
496 stop_processor(icom_port);
497
498 dev_err(&icom_port->adapter->pci_dev->dev,"Port not opertional\n");
499 }
500
501 if (new_page != NULL)
502 pci_free_consistent(dev, 4096, new_page, temp_pci);
503}
504
505static int startup(struct icom_port *icom_port)
506{
507 unsigned long temp;
508 unsigned char cable_id, raw_cable_id;
509 unsigned long flags;
510 int port;
511
512 trace(icom_port, "STARTUP", 0);
513
514 if (!icom_port->dram) {
515 /* should NEVER be NULL */
516 dev_err(&icom_port->adapter->pci_dev->dev,
517 "Unusable Port, port configuration missing\n");
518 return -ENODEV;
519 }
520
521 /*
522 * check Cable ID
523 */
524 raw_cable_id = readb(&icom_port->dram->cable_id);
525 trace(icom_port, "CABLE_ID", raw_cable_id);
526
527 /* Get cable ID into the lower 4 bits (standard form) */
528 cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4;
529
530 /* Check for valid Cable ID */
531 if (!(raw_cable_id & ICOM_CABLE_ID_VALID) ||
532 (cable_id != icom_port->cable_id)) {
533
534 /* reload adapter code, pick up any potential changes in cable id */
535 load_code(icom_port);
536
537 /* still no sign of cable, error out */
538 raw_cable_id = readb(&icom_port->dram->cable_id);
539 cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4;
540 if (!(raw_cable_id & ICOM_CABLE_ID_VALID) ||
541 (icom_port->cable_id == NO_CABLE))
542 return -EIO;
543 }
544
545 /*
546 * Finally, clear and enable interrupts
547 */
548 spin_lock_irqsave(&icom_lock, flags);
549 port = icom_port->port;
550 if (port == 0 || port == 1)
551 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask;
552 else
553 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2;
554
555 if (port == 0 || port == 2)
556 writew(0x00FF, icom_port->int_reg);
557 else
558 writew(0x3F00, icom_port->int_reg);
559 if (port < 4) {
560 temp = readl(int_mask_tbl[port].global_int_mask);
561 writel(temp & ~int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask);
562
563 /* write flush */
564 readl(int_mask_tbl[port].global_int_mask);
565 } else {
566 dev_err(&icom_port->adapter->pci_dev->dev,
567 "Invalid port assignment\n");
568 }
569
570 spin_unlock_irqrestore(&icom_lock, flags);
571 return 0;
572}
573
574static void shutdown(struct icom_port *icom_port)
575{
576 unsigned long temp;
577 unsigned char cmdReg;
578 unsigned long flags;
579 int port;
580
581 spin_lock_irqsave(&icom_lock, flags);
582 trace(icom_port, "SHUTDOWN", 0);
583
584 /*
585 * disable all interrupts
586 */
587 port = icom_port->port;
588 if (port == 0 || port == 1)
589 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask;
590 else
591 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2;
592
593 if (port < 4) {
594 temp = readl(int_mask_tbl[port].global_int_mask);
595 writel(temp | int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask);
596
597 /* write flush */
598 readl(int_mask_tbl[port].global_int_mask);
599 } else {
600 dev_err(&icom_port->adapter->pci_dev->dev,
601 "Invalid port assignment\n");
602 }
603 spin_unlock_irqrestore(&icom_lock, flags);
604
605 /*
606 * disable break condition
607 */
608 cmdReg = readb(&icom_port->dram->CmdReg);
609 if ((cmdReg | CMD_SND_BREAK) == CMD_SND_BREAK) {
610 writeb(cmdReg & ~CMD_SND_BREAK, &icom_port->dram->CmdReg);
611 }
612}
613
614static int icom_write(struct uart_port *port)
615{
616 unsigned long data_count;
617 unsigned char cmdReg;
618 unsigned long offset;
619 int temp_tail = port->info->xmit.tail;
620
621 trace(ICOM_PORT, "WRITE", 0);
622
623 if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) &
624 SA_FLAGS_READY_TO_XMIT) {
625 trace(ICOM_PORT, "WRITE_FULL", 0);
626 return 0;
627 }
628
629 data_count = 0;
630 while ((port->info->xmit.head != temp_tail) &&
631 (data_count <= XMIT_BUFF_SZ)) {
632
633 ICOM_PORT->xmit_buf[data_count++] =
634 port->info->xmit.buf[temp_tail];
635
636 temp_tail++;
637 temp_tail &= (UART_XMIT_SIZE - 1);
638 }
639
640 if (data_count) {
641 ICOM_PORT->statStg->xmit[0].flags =
642 cpu_to_le16(SA_FLAGS_READY_TO_XMIT);
643 ICOM_PORT->statStg->xmit[0].leLength =
644 cpu_to_le16(data_count);
645 offset =
646 (unsigned long) &ICOM_PORT->statStg->xmit[0] -
647 (unsigned long) ICOM_PORT->statStg;
648 *ICOM_PORT->xmitRestart =
649 cpu_to_le32(ICOM_PORT->statStg_pci + offset);
650 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
651 writeb(cmdReg | CMD_XMIT_RCV_ENABLE,
652 &ICOM_PORT->dram->CmdReg);
653 writeb(START_XMIT, &ICOM_PORT->dram->StartXmitCmd);
654 trace(ICOM_PORT, "WRITE_START", data_count);
655 /* write flush */
656 readb(&ICOM_PORT->dram->StartXmitCmd);
657 }
658
659 return data_count;
660}
661
662static inline void check_modem_status(struct icom_port *icom_port)
663{
664 static char old_status = 0;
665 char delta_status;
666 unsigned char status;
667
668 spin_lock(&icom_port->uart_port.lock);
669
670 /*modem input register */
671 status = readb(&icom_port->dram->isr);
672 trace(icom_port, "CHECK_MODEM", status);
673 delta_status = status ^ old_status;
674 if (delta_status) {
675 if (delta_status & ICOM_RI)
676 icom_port->uart_port.icount.rng++;
677 if (delta_status & ICOM_DSR)
678 icom_port->uart_port.icount.dsr++;
679 if (delta_status & ICOM_DCD)
680 uart_handle_dcd_change(&icom_port->uart_port,
681 delta_status & ICOM_DCD);
682 if (delta_status & ICOM_CTS)
683 uart_handle_cts_change(&icom_port->uart_port,
684 delta_status & ICOM_CTS);
685
686 wake_up_interruptible(&icom_port->uart_port.info->
687 delta_msr_wait);
688 old_status = status;
689 }
690 spin_unlock(&icom_port->uart_port.lock);
691}
692
693static void xmit_interrupt(u16 port_int_reg, struct icom_port *icom_port)
694{
695 unsigned short int count;
696 int i;
697
698 if (port_int_reg & (INT_XMIT_COMPLETED)) {
699 trace(icom_port, "XMIT_COMPLETE", 0);
700
701 /* clear buffer in use bit */
702 icom_port->statStg->xmit[0].flags &=
703 cpu_to_le16(~SA_FLAGS_READY_TO_XMIT);
704
705 count = (unsigned short int)
706 cpu_to_le16(icom_port->statStg->xmit[0].leLength);
707 icom_port->uart_port.icount.tx += count;
708
709 for (i=0; i<count &&
710 !uart_circ_empty(&icom_port->uart_port.info->xmit); i++) {
711
712 icom_port->uart_port.info->xmit.tail++;
713 icom_port->uart_port.info->xmit.tail &=
714 (UART_XMIT_SIZE - 1);
715 }
716
717 if (!icom_write(&icom_port->uart_port))
718 /* activate write queue */
719 uart_write_wakeup(&icom_port->uart_port);
720 } else
721 trace(icom_port, "XMIT_DISABLED", 0);
722}
723
724static void recv_interrupt(u16 port_int_reg, struct icom_port *icom_port)
725{
726 short int count, rcv_buff;
727 struct tty_struct *tty = icom_port->uart_port.info->tty;
728 unsigned short int status;
729 struct uart_icount *icount;
730 unsigned long offset;
33f0f88f 731 unsigned char flag;
1da177e4
LT		 732
733 trace(icom_port, "RCV_COMPLETE", 0);
734 rcv_buff = icom_port->next_rcv;
735
736 status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags);
737 while (status & SA_FL_RCV_DONE) {
33f0f88f 738 int first = -1;
1da177e4
LT		 739
740 trace(icom_port, "FID_STATUS", status);
741 count = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].leLength);
742
33f0f88f 743 count = tty_buffer_request_room(tty, count);
1da177e4 744 trace(icom_port, "RCV_COUNT", count);
1da177e4
LT		 745
746 trace(icom_port, "REAL_COUNT", count);
747
748 offset =
749 cpu_to_le32(icom_port->statStg->rcv[rcv_buff].leBuffer) -
750 icom_port->recv_buf_pci;
751
33f0f88f 752 /* Block copy all but the last byte as this may have status */
1da177e4 753 if (count > 0) {
33f0f88f
AC		 754 first = icom_port->recv_buf[offset];
755 tty_insert_flip_string(tty, icom_port->recv_buf + offset, count - 1);
1da177e4
LT		 756 }
757
758 icount = &icom_port->uart_port.icount;
759 icount->rx += count;
760
761 /* Break detect logic */
762 if ((status & SA_FLAGS_FRAME_ERROR)
33f0f88f 763 && first == 0) {
1da177e4
LT		 764 status &= ~SA_FLAGS_FRAME_ERROR;
765 status |= SA_FLAGS_BREAK_DET;
766 trace(icom_port, "BREAK_DET", 0);
767 }
768
33f0f88f
AC		 769 flag = TTY_NORMAL;
770
1da177e4
LT		 771 if (status &
772 (SA_FLAGS_BREAK_DET | SA_FLAGS_PARITY_ERROR |
773 SA_FLAGS_FRAME_ERROR | SA_FLAGS_OVERRUN)) {
774
775 if (status & SA_FLAGS_BREAK_DET)
776 icount->brk++;
777 if (status & SA_FLAGS_PARITY_ERROR)
778 icount->parity++;
779 if (status & SA_FLAGS_FRAME_ERROR)
780 icount->frame++;
781 if (status & SA_FLAGS_OVERRUN)
782 icount->overrun++;
783
784 /*
785 * Now check to see if character should be
786 * ignored, and mask off conditions which
787 * should be ignored.
788 */
789 if (status & icom_port->ignore_status_mask) {
790 trace(icom_port, "IGNORE_CHAR", 0);
791 goto ignore_char;
792 }
793
794 status &= icom_port->read_status_mask;
795
796 if (status & SA_FLAGS_BREAK_DET) {
33f0f88f 797 flag = TTY_BREAK;
1da177e4
LT		 798 } else if (status & SA_FLAGS_PARITY_ERROR) {
799 trace(icom_port, "PARITY_ERROR", 0);
33f0f88f 800 flag = TTY_PARITY;
1da177e4 801 } else if (status & SA_FLAGS_FRAME_ERROR)
33f0f88f
AC		 802 flag = TTY_FRAME;
803
1da177e4
LT		 804 }
805
33f0f88f
AC		 806 tty_insert_flip_char(tty, *(icom_port->recv_buf + offset + count - 1), flag);
807
808 if (status & SA_FLAGS_OVERRUN)
809 /*
810 * Overrun is special, since it's
811 * reported immediately, and doesn't
812 * affect the current character
813 */
814 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
815ignore_char:
816 icom_port->statStg->rcv[rcv_buff].flags = 0;
1da177e4
LT		 817 icom_port->statStg->rcv[rcv_buff].leLength = 0;
818 icom_port->statStg->rcv[rcv_buff].WorkingLength =
819 (unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
820
821 rcv_buff++;
822 if (rcv_buff == NUM_RBUFFS)
823 rcv_buff = 0;
824
825 status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags);
826 }
827 icom_port->next_rcv = rcv_buff;
828 tty_flip_buffer_push(tty);
829}
830
831static void process_interrupt(u16 port_int_reg,
832 struct icom_port *icom_port)
833{
834
835 spin_lock(&icom_port->uart_port.lock);
836 trace(icom_port, "INTERRUPT", port_int_reg);
837
838 if (port_int_reg & (INT_XMIT_COMPLETED | INT_XMIT_DISABLED))
839 xmit_interrupt(port_int_reg, icom_port);
840
841 if (port_int_reg & INT_RCV_COMPLETED)
842 recv_interrupt(port_int_reg, icom_port);
843
844 spin_unlock(&icom_port->uart_port.lock);
845}
846
7d12e780 847static irqreturn_t icom_interrupt(int irq, void *dev_id)
1da177e4
LT		 848{
849 void __iomem * int_reg;
850 u32 adapter_interrupts;
851 u16 port_int_reg;
852 struct icom_adapter *icom_adapter;
853 struct icom_port *icom_port;
854
855 /* find icom_port for this interrupt */
856 icom_adapter = (struct icom_adapter *) dev_id;
857
858 if ((icom_adapter->version | ADAPTER_V2) == ADAPTER_V2) {
859 int_reg = icom_adapter->base_addr + 0x8024;
860
861 adapter_interrupts = readl(int_reg);
862
863 if (adapter_interrupts & 0x00003FFF) {
864 /* port 2 interrupt, NOTE: for all ADAPTER_V2, port 2 will be active */
865 icom_port = &icom_adapter->port_info[2];
866 port_int_reg = (u16) adapter_interrupts;
867 process_interrupt(port_int_reg, icom_port);
868 check_modem_status(icom_port);
869 }
870 if (adapter_interrupts & 0x3FFF0000) {
871 /* port 3 interrupt */
872 icom_port = &icom_adapter->port_info[3];
873 if (icom_port->status == ICOM_PORT_ACTIVE) {
874 port_int_reg =
875 (u16) (adapter_interrupts >> 16);
876 process_interrupt(port_int_reg, icom_port);
877 check_modem_status(icom_port);
878 }
879 }
880
881 /* Clear out any pending interrupts */
882 writel(adapter_interrupts, int_reg);
883
884 int_reg = icom_adapter->base_addr + 0x8004;
885 } else {
886 int_reg = icom_adapter->base_addr + 0x4004;
887 }
888
889 adapter_interrupts = readl(int_reg);
890
891 if (adapter_interrupts & 0x00003FFF) {
892 /* port 0 interrupt, NOTE: for all adapters, port 0 will be active */
893 icom_port = &icom_adapter->port_info[0];
894 port_int_reg = (u16) adapter_interrupts;
895 process_interrupt(port_int_reg, icom_port);
896 check_modem_status(icom_port);
897 }
898 if (adapter_interrupts & 0x3FFF0000) {
899 /* port 1 interrupt */
900 icom_port = &icom_adapter->port_info[1];
901 if (icom_port->status == ICOM_PORT_ACTIVE) {
902 port_int_reg = (u16) (adapter_interrupts >> 16);
903 process_interrupt(port_int_reg, icom_port);
904 check_modem_status(icom_port);
905 }
906 }
907
908 /* Clear out any pending interrupts */
909 writel(adapter_interrupts, int_reg);
910
911 /* flush the write */
912 adapter_interrupts = readl(int_reg);
913
914 return IRQ_HANDLED;
915}
916
917/*
918 * ------------------------------------------------------------------
919 * Begin serial-core API
920 * ------------------------------------------------------------------
921 */
922static unsigned int icom_tx_empty(struct uart_port *port)
923{
924 int ret;
925 unsigned long flags;
926
927 spin_lock_irqsave(&port->lock, flags);
928 if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) &
929 SA_FLAGS_READY_TO_XMIT)
930 ret = TIOCSER_TEMT;
931 else
932 ret = 0;
933
934 spin_unlock_irqrestore(&port->lock, flags);
935 return ret;
936}
937
938static void icom_set_mctrl(struct uart_port *port, unsigned int mctrl)
939{
940 unsigned char local_osr;
941
942 trace(ICOM_PORT, "SET_MODEM", 0);
943 local_osr = readb(&ICOM_PORT->dram->osr);
944
945 if (mctrl & TIOCM_RTS) {
946 trace(ICOM_PORT, "RAISE_RTS", 0);
947 local_osr |= ICOM_RTS;
948 } else {
949 trace(ICOM_PORT, "LOWER_RTS", 0);
950 local_osr &= ~ICOM_RTS;
951 }
952
953 if (mctrl & TIOCM_DTR) {
954 trace(ICOM_PORT, "RAISE_DTR", 0);
955 local_osr |= ICOM_DTR;
956 } else {
957 trace(ICOM_PORT, "LOWER_DTR", 0);
958 local_osr &= ~ICOM_DTR;
959 }
960
961 writeb(local_osr, &ICOM_PORT->dram->osr);
962}
963
964static unsigned int icom_get_mctrl(struct uart_port *port)
965{
966 unsigned char status;
967 unsigned int result;
968
969 trace(ICOM_PORT, "GET_MODEM", 0);
970
971 status = readb(&ICOM_PORT->dram->isr);
972
973 result = ((status & ICOM_DCD) ? TIOCM_CAR : 0)
974 | ((status & ICOM_RI) ? TIOCM_RNG : 0)
975 | ((status & ICOM_DSR) ? TIOCM_DSR : 0)
976 | ((status & ICOM_CTS) ? TIOCM_CTS : 0);
977 return result;
978}
979
b129a8cc 980static void icom_stop_tx(struct uart_port *port)
1da177e4
LT		 981{
982 unsigned char cmdReg;
983
b129a8cc
RK		 984 trace(ICOM_PORT, "STOP", 0);
985 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
986 writeb(cmdReg | CMD_HOLD_XMIT, &ICOM_PORT->dram->CmdReg);
1da177e4
LT		 987}
988
b129a8cc 989static void icom_start_tx(struct uart_port *port)
1da177e4
LT		 990{
991 unsigned char cmdReg;
992
993 trace(ICOM_PORT, "START", 0);
994 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
995 if ((cmdReg & CMD_HOLD_XMIT) == CMD_HOLD_XMIT)
996 writeb(cmdReg & ~CMD_HOLD_XMIT,
997 &ICOM_PORT->dram->CmdReg);
998
999 icom_write(port);
1000}
1001
1002static void icom_send_xchar(struct uart_port *port, char ch)
1003{
1004 unsigned char xdata;
1005 int index;
1006 unsigned long flags;
1007
1008 trace(ICOM_PORT, "SEND_XCHAR", ch);
1009
1010 /* wait .1 sec to send char */
1011 for (index = 0; index < 10; index++) {
1012 spin_lock_irqsave(&port->lock, flags);
1013 xdata = readb(&ICOM_PORT->dram->xchar);
1014 if (xdata == 0x00) {
1015 trace(ICOM_PORT, "QUICK_WRITE", 0);
1016 writeb(ch, &ICOM_PORT->dram->xchar);
1017
1018 /* flush write operation */
1019 xdata = readb(&ICOM_PORT->dram->xchar);
1020 spin_unlock_irqrestore(&port->lock, flags);
1021 break;
1022 }
1023 spin_unlock_irqrestore(&port->lock, flags);
1024 msleep(10);
1025 }
1026}
1027
1028static void icom_stop_rx(struct uart_port *port)
1029{
1030 unsigned char cmdReg;
1031
1032 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1033 writeb(cmdReg & ~CMD_RCV_ENABLE, &ICOM_PORT->dram->CmdReg);
1034}
1035
1036static void icom_enable_ms(struct uart_port *port)
1037{
1038 /* no-op */
1039}
1040
1041static void icom_break(struct uart_port *port, int break_state)
1042{
1043 unsigned char cmdReg;
1044 unsigned long flags;
1045
1046 spin_lock_irqsave(&port->lock, flags);
1047 trace(ICOM_PORT, "BREAK", 0);
1048 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1049 if (break_state == -1) {
1050 writeb(cmdReg | CMD_SND_BREAK, &ICOM_PORT->dram->CmdReg);
1051 } else {
1052 writeb(cmdReg & ~CMD_SND_BREAK, &ICOM_PORT->dram->CmdReg);
1053 }
1054 spin_unlock_irqrestore(&port->lock, flags);
1055}
1056
1057static int icom_open(struct uart_port *port)
1058{
1059 int retval;
1060
1061 kobject_get(&ICOM_PORT->adapter->kobj);
1062 retval = startup(ICOM_PORT);
1063
1064 if (retval) {
1065 kobject_put(&ICOM_PORT->adapter->kobj);
1066 trace(ICOM_PORT, "STARTUP_ERROR", 0);
1067 return retval;
1068 }
1069
1070 return 0;
1071}
1072
1073static void icom_close(struct uart_port *port)
1074{
1075 unsigned char cmdReg;
1076
1077 trace(ICOM_PORT, "CLOSE", 0);
1078
1079 /* stop receiver */
1080 cmdReg = readb(&ICOM_PORT->dram->CmdReg);
1081 writeb(cmdReg & (unsigned char) ~CMD_RCV_ENABLE,
1082 &ICOM_PORT->dram->CmdReg);
1083
1084 shutdown(ICOM_PORT);
1085
1086 kobject_put(&ICOM_PORT->adapter->kobj);
1087}
1088
1089static void icom_set_termios(struct uart_port *port,
1090 struct termios *termios,
1091 struct termios *old_termios)
1092{
1093 int baud;
1094 unsigned cflag, iflag;
1095 int bits;
1096 char new_config2;
1097 char new_config3 = 0;
1098 char tmp_byte;
1099 int index;
1100 int rcv_buff, xmit_buff;
1101 unsigned long offset;
1102 unsigned long flags;
1103
1104 spin_lock_irqsave(&port->lock, flags);
1105 trace(ICOM_PORT, "CHANGE_SPEED", 0);
1106
1107 cflag = termios->c_cflag;
1108 iflag = termios->c_iflag;
1109
1110 new_config2 = ICOM_ACFG_DRIVE1;
1111
1112 /* byte size and parity */
1113 switch (cflag & CSIZE) {
1114 case CS5: /* 5 bits/char */
1115 new_config2 |= ICOM_ACFG_5BPC;
1116 bits = 7;
1117 break;
1118 case CS6: /* 6 bits/char */
1119 new_config2 |= ICOM_ACFG_6BPC;
1120 bits = 8;
1121 break;
1122 case CS7: /* 7 bits/char */
1123 new_config2 |= ICOM_ACFG_7BPC;
1124 bits = 9;
1125 break;
1126 case CS8: /* 8 bits/char */
1127 new_config2 |= ICOM_ACFG_8BPC;
1128 bits = 10;
1129 break;
1130 default:
1131 bits = 10;
1132 break;
1133 }
1134 if (cflag & CSTOPB) {
1135 /* 2 stop bits */
1136 new_config2 |= ICOM_ACFG_2STOP_BIT;
1137 bits++;
1138 }
1139 if (cflag & PARENB) {
1140 /* parity bit enabled */
1141 new_config2 |= ICOM_ACFG_PARITY_ENAB;
1142 trace(ICOM_PORT, "PARENB", 0);
1143 bits++;
1144 }
1145 if (cflag & PARODD) {
1146 /* odd parity */
1147 new_config2 |= ICOM_ACFG_PARITY_ODD;
1148 trace(ICOM_PORT, "PARODD", 0);
1149 }
1150
1151 /* Determine divisor based on baud rate */
1152 baud = uart_get_baud_rate(port, termios, old_termios,
1153 icom_acfg_baud[0],
1154 icom_acfg_baud[BAUD_TABLE_LIMIT]);
1155 if (!baud)
1156 baud = 9600; /* B0 transition handled in rs_set_termios */
1157
1158 for (index = 0; index < BAUD_TABLE_LIMIT; index++) {
1159 if (icom_acfg_baud[index] == baud) {
1160 new_config3 = index;
1161 break;
1162 }
1163 }
1164
1165 uart_update_timeout(port, cflag, baud);
1166
1167 /* CTS flow control flag and modem status interrupts */
1168 tmp_byte = readb(&(ICOM_PORT->dram->HDLCConfigReg));
1169 if (cflag & CRTSCTS)
1170 tmp_byte |= HDLC_HDW_FLOW;
1171 else
1172 tmp_byte &= ~HDLC_HDW_FLOW;
1173 writeb(tmp_byte, &(ICOM_PORT->dram->HDLCConfigReg));
1174
1175 /*
1176 * Set up parity check flag
1177 */
1178 ICOM_PORT->read_status_mask = SA_FLAGS_OVERRUN | SA_FL_RCV_DONE;
1179 if (iflag & INPCK)
1180 ICOM_PORT->read_status_mask |=
1181 SA_FLAGS_FRAME_ERROR | SA_FLAGS_PARITY_ERROR;
1182
1183 if ((iflag & BRKINT) || (iflag & PARMRK))
1184 ICOM_PORT->read_status_mask |= SA_FLAGS_BREAK_DET;
1185
1186 /*
1187 * Characters to ignore
1188 */
1189 ICOM_PORT->ignore_status_mask = 0;
1190 if (iflag & IGNPAR)
1191 ICOM_PORT->ignore_status_mask |=
1192 SA_FLAGS_PARITY_ERROR | SA_FLAGS_FRAME_ERROR;
1193 if (iflag & IGNBRK) {
1194 ICOM_PORT->ignore_status_mask |= SA_FLAGS_BREAK_DET;
1195 /*
1196 * If we're ignore parity and break indicators, ignore
1197 * overruns too. (For real raw support).
1198 */
1199 if (iflag & IGNPAR)
1200 ICOM_PORT->ignore_status_mask |= SA_FLAGS_OVERRUN;
1201 }
1202
1203 /*
1204 * !!! ignore all characters if CREAD is not set
1205 */
1206 if ((cflag & CREAD) == 0)
1207 ICOM_PORT->ignore_status_mask |= SA_FL_RCV_DONE;
1208
1209 /* Turn off Receiver to prepare for reset */
1210 writeb(CMD_RCV_DISABLE, &ICOM_PORT->dram->CmdReg);
1211
1212 for (index = 0; index < 10; index++) {
1213 if (readb(&ICOM_PORT->dram->PrevCmdReg) == 0x00) {
1214 break;
1215 }
1216 }
1217
1218 /* clear all current buffers of data */
1219 for (rcv_buff = 0; rcv_buff < NUM_RBUFFS; rcv_buff++) {
1220 ICOM_PORT->statStg->rcv[rcv_buff].flags = 0;
1221 ICOM_PORT->statStg->rcv[rcv_buff].leLength = 0;
1222 ICOM_PORT->statStg->rcv[rcv_buff].WorkingLength =
1223 (unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
1224 }
1225
1226 for (xmit_buff = 0; xmit_buff < NUM_XBUFFS; xmit_buff++) {
1227 ICOM_PORT->statStg->xmit[xmit_buff].flags = 0;
1228 }
1229
1230 /* activate changes and start xmit and receiver here */
1231 /* Enable the receiver */
1232 writeb(new_config3, &(ICOM_PORT->dram->async_config3));
1233 writeb(new_config2, &(ICOM_PORT->dram->async_config2));
1234 tmp_byte = readb(&(ICOM_PORT->dram->HDLCConfigReg));
1235 tmp_byte |= HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL;
1236 writeb(tmp_byte, &(ICOM_PORT->dram->HDLCConfigReg));
1237 writeb(0x04, &(ICOM_PORT->dram->FlagFillIdleTimer)); /* 0.5 seconds */
1238 writeb(0xFF, &(ICOM_PORT->dram->ier)); /* enable modem signal interrupts */
1239
1240 /* reset processor */
1241 writeb(CMD_RESTART, &ICOM_PORT->dram->CmdReg);
1242
1243 for (index = 0; index < 10; index++) {
1244 if (readb(&ICOM_PORT->dram->CmdReg) == 0x00) {
1245 break;
1246 }
1247 }
1248
1249 /* Enable Transmitter and Reciever */
1250 offset =
1251 (unsigned long) &ICOM_PORT->statStg->rcv[0] -
1252 (unsigned long) ICOM_PORT->statStg;
1253 writel(ICOM_PORT->statStg_pci + offset,
1254 &ICOM_PORT->dram->RcvStatusAddr);
1255 ICOM_PORT->next_rcv = 0;
1256 ICOM_PORT->put_length = 0;
1257 *ICOM_PORT->xmitRestart = 0;
1258 writel(ICOM_PORT->xmitRestart_pci,
1259 &ICOM_PORT->dram->XmitStatusAddr);
1260 trace(ICOM_PORT, "XR_ENAB", 0);
1261 writeb(CMD_XMIT_RCV_ENABLE, &ICOM_PORT->dram->CmdReg);
1262
1263 spin_unlock_irqrestore(&port->lock, flags);
1264}
1265
1266static const char *icom_type(struct uart_port *port)
1267{
1268 return "icom";
1269}
1270
1271static void icom_release_port(struct uart_port *port)
1272{
1273}
1274
1275static int icom_request_port(struct uart_port *port)
1276{
1277 return 0;
1278}
1279
1280static void icom_config_port(struct uart_port *port, int flags)
1281{
1282 port->type = PORT_ICOM;
1283}
1284
1285static struct uart_ops icom_ops = {
1286 .tx_empty = icom_tx_empty,
1287 .set_mctrl = icom_set_mctrl,
1288 .get_mctrl = icom_get_mctrl,
1289 .stop_tx = icom_stop_tx,
1290 .start_tx = icom_start_tx,
1291 .send_xchar = icom_send_xchar,
1292 .stop_rx = icom_stop_rx,
1293 .enable_ms = icom_enable_ms,
1294 .break_ctl = icom_break,
1295 .startup = icom_open,
1296 .shutdown = icom_close,
1297 .set_termios = icom_set_termios,
1298 .type = icom_type,
1299 .release_port = icom_release_port,
1300 .request_port = icom_request_port,
1301 .config_port = icom_config_port,
1302};
1303
1304#define ICOM_CONSOLE NULL
1305
1306static struct uart_driver icom_uart_driver = {
1307 .owner = THIS_MODULE,
1308 .driver_name = ICOM_DRIVER_NAME,
1309 .dev_name = "ttyA",
1310 .major = ICOM_MAJOR,
1311 .minor = ICOM_MINOR_START,
1312 .nr = NR_PORTS,
1313 .cons = ICOM_CONSOLE,
1314};
1315
1316static int __devinit icom_init_ports(struct icom_adapter *icom_adapter)
1317{
1318 u32 subsystem_id = icom_adapter->subsystem_id;
1319 int retval = 0;
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 retval;
1366}
1367
1368static 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}
1384static int __init icom_load_ports(struct icom_adapter *icom_adapter)
1385{
1386 struct icom_port *icom_port;
1387 int port_num;
1388 int retval;
1389
1390 for (port_num = 0; port_num < icom_adapter->numb_ports; port_num++) {
1391
1392 icom_port = &icom_adapter->port_info[port_num];
1393
1394 if (icom_port->status == ICOM_PORT_ACTIVE) {
1395 icom_port_active(icom_port, icom_adapter, port_num);
1396 icom_port->dram = icom_adapter->base_addr +
1397 0x2000 * icom_port->port;
1398
1399 icom_port->adapter = icom_adapter;
1400
1401 /* get port memory */
1402 if ((retval = get_port_memory(icom_port)) != 0) {
1403 dev_err(&icom_port->adapter->pci_dev->dev,
1404 "Memory allocation for port FAILED\n");
1405 }
1406 }
1407 }
1408 return 0;
1409}
1410
1411static int __devinit icom_alloc_adapter(struct icom_adapter
1412 **icom_adapter_ref)
1413{
1414 int adapter_count = 0;
1415 struct icom_adapter *icom_adapter;
1416 struct icom_adapter *cur_adapter_entry;
1417 struct list_head *tmp;
1418
1419 icom_adapter = (struct icom_adapter *)
1420 kmalloc(sizeof(struct icom_adapter), GFP_KERNEL);
1421
1422 if (!icom_adapter) {
1423 return -ENOMEM;
1424 }
1425
1426 memset(icom_adapter, 0, sizeof(struct icom_adapter));
1427
1428 list_for_each(tmp, &icom_adapter_head) {
1429 cur_adapter_entry =
1430 list_entry(tmp, struct icom_adapter,
1431 icom_adapter_entry);
1432 if (cur_adapter_entry->index != adapter_count) {
1433 break;
1434 }
1435 adapter_count++;
1436 }
1437
1438 icom_adapter->index = adapter_count;
1439 list_add_tail(&icom_adapter->icom_adapter_entry, tmp);
1440
1441 *icom_adapter_ref = icom_adapter;
1442 return 0;
1443}
1444
1445static void icom_free_adapter(struct icom_adapter *icom_adapter)
1446{
1447 list_del(&icom_adapter->icom_adapter_entry);
1448 kfree(icom_adapter);
1449}
1450
1451static void icom_remove_adapter(struct icom_adapter *icom_adapter)
1452{
1453 struct icom_port *icom_port;
1454 int index;
1455
1456 for (index = 0; index < icom_adapter->numb_ports; index++) {
1457 icom_port = &icom_adapter->port_info[index];
1458
1459 if (icom_port->status == ICOM_PORT_ACTIVE) {
1460 dev_info(&icom_adapter->pci_dev->dev,
1461 "Device removed\n");
1462
1463 uart_remove_one_port(&icom_uart_driver,
1464 &icom_port->uart_port);
1465
1466 /* be sure that DTR and RTS are dropped */
1467 writeb(0x00, &icom_port->dram->osr);
1468
1469 /* Wait 0.1 Sec for simple Init to complete */
1470 msleep(100);
1471
1472 /* Stop proccessor */
1473 stop_processor(icom_port);
1474
1475 free_port_memory(icom_port);
1476 }
1477 }
1478
1479 free_irq(icom_adapter->irq_number, (void *) icom_adapter);
1480 iounmap(icom_adapter->base_addr);
1481 icom_free_adapter(icom_adapter);
1482 pci_release_regions(icom_adapter->pci_dev);
1483}
1484
1485static void icom_kobj_release(struct kobject *kobj)
1486{
1487 struct icom_adapter *icom_adapter;
1488
1489 icom_adapter = to_icom_adapter(kobj);
1490 icom_remove_adapter(icom_adapter);
1491}
1492
1493static struct kobj_type icom_kobj_type = {
1494 .release = icom_kobj_release,
1495};
1496
1497static int __devinit icom_probe(struct pci_dev *dev,
1498 const struct pci_device_id *ent)
1499{
1500 int index;
1501 unsigned int command_reg;
1502 int retval;
1503 struct icom_adapter *icom_adapter;
1504 struct icom_port *icom_port;
1505
1506 retval = pci_enable_device(dev);
1507 if (retval) {
1508 dev_err(&dev->dev, "Device enable FAILED\n");
1509 return retval;
1510 }
1511
1512 if ( (retval = pci_request_regions(dev, "icom"))) {
1513 dev_err(&dev->dev, "pci_request_region FAILED\n");
1514 pci_disable_device(dev);
1515 return retval;
1516 }
1517
1518 pci_set_master(dev);
1519
1520 if ( (retval = pci_read_config_dword(dev, PCI_COMMAND, &command_reg))) {
1521 dev_err(&dev->dev, "PCI Config read FAILED\n");
1522 return retval;
1523 }
1524
1525 pci_write_config_dword(dev, PCI_COMMAND,
1526 command_reg | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
1527 | PCI_COMMAND_PARITY | PCI_COMMAND_SERR);
1528
1529 if (ent->driver_data == ADAPTER_V1) {
1530 pci_write_config_dword(dev, 0x44, 0x8300830A);
1531 } else {
1532 pci_write_config_dword(dev, 0x44, 0x42004200);
1533 pci_write_config_dword(dev, 0x48, 0x42004200);
1534 }
1535
1536
1537 retval = icom_alloc_adapter(&icom_adapter);
1538 if (retval) {
1539 dev_err(&dev->dev, "icom_alloc_adapter FAILED\n");
1540 retval = -EIO;
1541 goto probe_exit0;
1542 }
1543
1544 icom_adapter->base_addr_pci = pci_resource_start(dev, 0);
1545 icom_adapter->irq_number = dev->irq;
1546 icom_adapter->pci_dev = dev;
1547 icom_adapter->version = ent->driver_data;
1548 icom_adapter->subsystem_id = ent->subdevice;
1549
1550
1551 retval = icom_init_ports(icom_adapter);
1552 if (retval) {
1553 dev_err(&dev->dev, "Port configuration failed\n");
1554 goto probe_exit1;
1555 }
1556
1557 icom_adapter->base_addr = ioremap(icom_adapter->base_addr_pci,
1558 pci_resource_len(dev, 0));
1559
1560 if (!icom_adapter->base_addr)
1561 goto probe_exit1;
1562
1563 /* save off irq and request irq line */
1564 if ( (retval = request_irq(dev->irq, icom_interrupt,
40663cc7 1565 IRQF_DISABLED | IRQF_SHARED, ICOM_DRIVER_NAME,
1da177e4
LT		 1566 (void *) icom_adapter))) {
1567 goto probe_exit2;
1568 }
1569
1570 retval = icom_load_ports(icom_adapter);
1571
1572 for (index = 0; index < icom_adapter->numb_ports; index++) {
1573 icom_port = &icom_adapter->port_info[index];
1574
1575 if (icom_port->status == ICOM_PORT_ACTIVE) {
1576 icom_port->uart_port.irq = icom_port->adapter->irq_number;
1577 icom_port->uart_port.type = PORT_ICOM;
1578 icom_port->uart_port.iotype = UPIO_MEM;
1579 icom_port->uart_port.membase =
1580 (char *) icom_adapter->base_addr_pci;
1581 icom_port->uart_port.fifosize = 16;
1582 icom_port->uart_port.ops = &icom_ops;
1583 icom_port->uart_port.line =
1584 icom_port->port + icom_adapter->index * 4;
1585 if (uart_add_one_port (&icom_uart_driver, &icom_port->uart_port)) {
1586 icom_port->status = ICOM_PORT_OFF;
1587 dev_err(&dev->dev, "Device add failed\n");
1588 } else
1589 dev_info(&dev->dev, "Device added\n");
1590 }
1591 }
1592
1593 kobject_init(&icom_adapter->kobj);
1594 icom_adapter->kobj.ktype = &icom_kobj_type;
1595 return 0;
1596
1597probe_exit2:
1598 iounmap(icom_adapter->base_addr);
1599probe_exit1:
1600 icom_free_adapter(icom_adapter);
1601
1602probe_exit0:
1603 pci_release_regions(dev);
1604 pci_disable_device(dev);
1605
1606 return retval;
1607
1608
1609}
1610
1611static void __devexit icom_remove(struct pci_dev *dev)
1612{
1613 struct icom_adapter *icom_adapter;
1614 struct list_head *tmp;
1615
1616 list_for_each(tmp, &icom_adapter_head) {
1617 icom_adapter = list_entry(tmp, struct icom_adapter,
1618 icom_adapter_entry);
1619 if (icom_adapter->pci_dev == dev) {
1620 kobject_put(&icom_adapter->kobj);
1621 return;
1622 }
1623 }
1624
1625 dev_err(&dev->dev, "Unable to find device to remove\n");
1626}
1627
1628static struct pci_driver icom_pci_driver = {
1629 .name = ICOM_DRIVER_NAME,
1630 .id_table = icom_pci_table,
1631 .probe = icom_probe,
1632 .remove = __devexit_p(icom_remove),
1633};
1634
1635static int __init icom_init(void)
1636{
1637 int ret;
1638
1639 spin_lock_init(&icom_lock);
1640
1641 ret = uart_register_driver(&icom_uart_driver);
1642 if (ret)
1643 return ret;
1644
1645 ret = pci_register_driver(&icom_pci_driver);
1646
1647 if (ret < 0)
1648 uart_unregister_driver(&icom_uart_driver);
1649
1650 return ret;
1651}
1652
1653static void __exit icom_exit(void)
1654{
1655 pci_unregister_driver(&icom_pci_driver);
1656 uart_unregister_driver(&icom_uart_driver);
1657}
1658
1659module_init(icom_init);
1660module_exit(icom_exit);
1661
1662#ifdef ICOM_TRACE
1663static inline void trace(struct icom_port *icom_port, char *trace_pt,
1664 unsigned long trace_data)
1665{
1666 dev_info(&icom_port->adapter->pci_dev->dev, ":%d:%s - %lx\n",
1667 icom_port->port, trace_pt, trace_data);
1668}
1669#endif
1670
1671MODULE_AUTHOR("Michael Anderson <mjanders@us.ibm.com>");
1672MODULE_DESCRIPTION("IBM iSeries Serial IOA driver");
1673MODULE_SUPPORTED_DEVICE
1674 ("IBM iSeries 2745, 2771, 2772, 2742, 2793 and 2805 Communications adapters");
1675MODULE_LICENSE("GPL");
1676
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