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staging: usbip: bugfix for isochronous packets and optimization
[zen-stable.git] / drivers / scsi / pcmcia / sym53c500_cs.c
blob8552296edaa1e8062504e4b8ee63d46cc19694e2
1 /*
2 * sym53c500_cs.c Bob Tracy (rct@frus.com)
3 *
4 * A rewrite of the pcmcia-cs add-on driver for newer (circa 1997)
5 * New Media Bus Toaster PCMCIA SCSI cards using the Symbios Logic
6 * 53c500 controller: intended for use with 2.6 and later kernels.
7 * The pcmcia-cs add-on version of this driver is not supported
8 * beyond 2.4. It consisted of three files with history/copyright
9 * information as follows:
10 *
11 * SYM53C500.h
12 * Bob Tracy (rct@frus.com)
13 * Original by Tom Corner (tcorner@via.at).
14 * Adapted from NCR53c406a.h which is Copyrighted (C) 1994
15 * Normunds Saumanis (normunds@rx.tech.swh.lv)
16 *
17 * SYM53C500.c
18 * Bob Tracy (rct@frus.com)
19 * Original driver by Tom Corner (tcorner@via.at) was adapted
20 * from NCR53c406a.c which is Copyrighted (C) 1994, 1995, 1996
21 * Normunds Saumanis (normunds@fi.ibm.com)
22 *
23 * sym53c500.c
24 * Bob Tracy (rct@frus.com)
25 * Original by Tom Corner (tcorner@via.at) was adapted from a
26 * driver for the Qlogic SCSI card written by
27 * David Hinds (dhinds@allegro.stanford.edu).
28 *
29 * This program is free software; you can redistribute it and/or modify it
30 * under the terms of the GNU General Public License as published by the
31 * Free Software Foundation; either version 2, or (at your option) any
32 * later version.
33 *
34 * This program is distributed in the hope that it will be useful, but
35 * WITHOUT ANY WARRANTY; without even the implied warranty of
36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
37 * General Public License for more details.
38 */
39
40 #define SYM53C500_DEBUG 0
41 #define VERBOSE_SYM53C500_DEBUG 0
42
43 /*
44 * Set this to 0 if you encounter kernel lockups while transferring
45 * data in PIO mode. Note this can be changed via "sysfs".
46 */
47 #define USE_FAST_PIO 1
48
49 /* =============== End of user configurable parameters ============== */
50
51 #include <linux/module.h>
52 #include <linux/moduleparam.h>
53 #include <linux/errno.h>
54 #include <linux/init.h>
55 #include <linux/interrupt.h>
56 #include <linux/kernel.h>
57 #include <linux/slab.h>
58 #include <linux/string.h>
59 #include <linux/ioport.h>
60 #include <linux/blkdev.h>
61 #include <linux/spinlock.h>
62 #include <linux/bitops.h>
63
64 #include <asm/io.h>
65 #include <asm/dma.h>
66 #include <asm/irq.h>
67
68 #include <scsi/scsi_ioctl.h>
69 #include <scsi/scsi_cmnd.h>
70 #include <scsi/scsi_device.h>
71 #include <scsi/scsi.h>
72 #include <scsi/scsi_host.h>
73
74 #include <pcmcia/cistpl.h>
75 #include <pcmcia/ds.h>
76 #include <pcmcia/ciscode.h>
77
78
79 /* ================================================================== */
80
81 #define SYNC_MODE 0 /* Synchronous transfer mode */
82
83 /* Default configuration */
84 #define C1_IMG 0x07 /* ID=7 */
85 #define C2_IMG 0x48 /* FE SCSI2 */
86 #define C3_IMG 0x20 /* CDB */
87 #define C4_IMG 0x04 /* ANE */
88 #define C5_IMG 0xa4 /* ? changed from b6= AA PI SIE POL */
89 #define C7_IMG 0x80 /* added for SYM53C500 t. corner */
90
91 /* Hardware Registers: offsets from io_port (base) */
92
93 /* Control Register Set 0 */
94 #define TC_LSB 0x00 /* transfer counter lsb */
95 #define TC_MSB 0x01 /* transfer counter msb */
96 #define SCSI_FIFO 0x02 /* scsi fifo register */
97 #define CMD_REG 0x03 /* command register */
98 #define STAT_REG 0x04 /* status register */
99 #define DEST_ID 0x04 /* selection/reselection bus id */
100 #define INT_REG 0x05 /* interrupt status register */
101 #define SRTIMOUT 0x05 /* select/reselect timeout reg */
102 #define SEQ_REG 0x06 /* sequence step register */
103 #define SYNCPRD 0x06 /* synchronous transfer period */
104 #define FIFO_FLAGS 0x07 /* indicates # of bytes in fifo */
105 #define SYNCOFF 0x07 /* synchronous offset register */
106 #define CONFIG1 0x08 /* configuration register */
107 #define CLKCONV 0x09 /* clock conversion register */
108 /* #define TESTREG 0x0A */ /* test mode register */
109 #define CONFIG2 0x0B /* configuration 2 register */
110 #define CONFIG3 0x0C /* configuration 3 register */
111 #define CONFIG4 0x0D /* configuration 4 register */
112 #define TC_HIGH 0x0E /* transfer counter high */
113 /* #define FIFO_BOTTOM 0x0F */ /* reserve FIFO byte register */
114
115 /* Control Register Set 1 */
116 /* #define JUMPER_SENSE 0x00 */ /* jumper sense port reg (r/w) */
117 /* #define SRAM_PTR 0x01 */ /* SRAM address pointer reg (r/w) */
118 /* #define SRAM_DATA 0x02 */ /* SRAM data register (r/w) */
119 #define PIO_FIFO 0x04 /* PIO FIFO registers (r/w) */
120 /* #define PIO_FIFO1 0x05 */ /* */
121 /* #define PIO_FIFO2 0x06 */ /* */
122 /* #define PIO_FIFO3 0x07 */ /* */
123 #define PIO_STATUS 0x08 /* PIO status (r/w) */
124 /* #define ATA_CMD 0x09 */ /* ATA command/status reg (r/w) */
125 /* #define ATA_ERR 0x0A */ /* ATA features/error reg (r/w) */
126 #define PIO_FLAG 0x0B /* PIO flag interrupt enable (r/w) */
127 #define CONFIG5 0x09 /* configuration 5 register */
128 /* #define SIGNATURE 0x0E */ /* signature register (r) */
129 /* #define CONFIG6 0x0F */ /* configuration 6 register (r) */
130 #define CONFIG7 0x0d
131
132 /* select register set 0 */
133 #define REG0(x) (outb(C4_IMG, (x) + CONFIG4))
134 /* select register set 1 */
135 #define REG1(x) outb(C7_IMG, (x) + CONFIG7); outb(C5_IMG, (x) + CONFIG5)
136
137 #if SYM53C500_DEBUG
138 #define DEB(x) x
139 #else
140 #define DEB(x)
141 #endif
142
143 #if VERBOSE_SYM53C500_DEBUG
144 #define VDEB(x) x
145 #else
146 #define VDEB(x)
147 #endif
148
149 #define LOAD_DMA_COUNT(x, count) \
150 outb(count & 0xff, (x) + TC_LSB); \
151 outb((count >> 8) & 0xff, (x) + TC_MSB); \
152 outb((count >> 16) & 0xff, (x) + TC_HIGH);
153
154 /* Chip commands */
155 #define DMA_OP 0x80
156
157 #define SCSI_NOP 0x00
158 #define FLUSH_FIFO 0x01
159 #define CHIP_RESET 0x02
160 #define SCSI_RESET 0x03
161 #define RESELECT 0x40
162 #define SELECT_NO_ATN 0x41
163 #define SELECT_ATN 0x42
164 #define SELECT_ATN_STOP 0x43
165 #define ENABLE_SEL 0x44
166 #define DISABLE_SEL 0x45
167 #define SELECT_ATN3 0x46
168 #define RESELECT3 0x47
169 #define TRANSFER_INFO 0x10
170 #define INIT_CMD_COMPLETE 0x11
171 #define MSG_ACCEPT 0x12
172 #define TRANSFER_PAD 0x18
173 #define SET_ATN 0x1a
174 #define RESET_ATN 0x1b
175 #define SEND_MSG 0x20
176 #define SEND_STATUS 0x21
177 #define SEND_DATA 0x22
178 #define DISCONN_SEQ 0x23
179 #define TERMINATE_SEQ 0x24
180 #define TARG_CMD_COMPLETE 0x25
181 #define DISCONN 0x27
182 #define RECV_MSG 0x28
183 #define RECV_CMD 0x29
184 #define RECV_DATA 0x2a
185 #define RECV_CMD_SEQ 0x2b
186 #define TARGET_ABORT_DMA 0x04
187
188 /* ================================================================== */
189
190 struct scsi_info_t {
191 struct pcmcia_device *p_dev;
192 struct Scsi_Host *host;
193 unsigned short manf_id;
194 };
195
196 /*
197 * Repository for per-instance host data.
198 */
199 struct sym53c500_data {
200 struct scsi_cmnd *current_SC;
201 int fast_pio;
202 };
203
204 enum Phase {
205 idle,
206 data_out,
207 data_in,
208 command_ph,
209 status_ph,
210 message_out,
211 message_in
212 };
213
214 /* ================================================================== */
215
216 static void
217 chip_init(int io_port)
218 {
219 REG1(io_port);
220 outb(0x01, io_port + PIO_STATUS);
221 outb(0x00, io_port + PIO_FLAG);
222
223 outb(C4_IMG, io_port + CONFIG4); /* REG0(io_port); */
224 outb(C3_IMG, io_port + CONFIG3);
225 outb(C2_IMG, io_port + CONFIG2);
226 outb(C1_IMG, io_port + CONFIG1);
227
228 outb(0x05, io_port + CLKCONV); /* clock conversion factor */
229 outb(0x9C, io_port + SRTIMOUT); /* Selection timeout */
230 outb(0x05, io_port + SYNCPRD); /* Synchronous transfer period */
231 outb(SYNC_MODE, io_port + SYNCOFF); /* synchronous mode */
232 }
233
234 static void
235 SYM53C500_int_host_reset(int io_port)
236 {
237 outb(C4_IMG, io_port + CONFIG4); /* REG0(io_port); */
238 outb(CHIP_RESET, io_port + CMD_REG);
239 outb(SCSI_NOP, io_port + CMD_REG); /* required after reset */
240 outb(SCSI_RESET, io_port + CMD_REG);
241 chip_init(io_port);
242 }
243
244 static __inline__ int
245 SYM53C500_pio_read(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
246 {
247 int i;
248 int len; /* current scsi fifo size */
249
250 REG1(base);
251 while (reqlen) {
252 i = inb(base + PIO_STATUS);
253 /* VDEB(printk("pio_status=%x\n", i)); */
254 if (i & 0x80)
255 return 0;
256
257 switch (i & 0x1e) {
258 default:
259 case 0x10: /* fifo empty */
260 len = 0;
261 break;
262 case 0x0:
263 len = 1;
264 break;
265 case 0x8: /* fifo 1/3 full */
266 len = 42;
267 break;
268 case 0xc: /* fifo 2/3 full */
269 len = 84;
270 break;
271 case 0xe: /* fifo full */
272 len = 128;
273 break;
274 }
275
276 if ((i & 0x40) && len == 0) { /* fifo empty and interrupt occurred */
277 return 0;
278 }
279
280 if (len) {
281 if (len > reqlen)
282 len = reqlen;
283
284 if (fast_pio && len > 3) {
285 insl(base + PIO_FIFO, request, len >> 2);
286 request += len & 0xfc;
287 reqlen -= len & 0xfc;
288 } else {
289 while (len--) {
290 *request++ = inb(base + PIO_FIFO);
291 reqlen--;
292 }
293 }
294 }
295 }
296 return 0;
297 }
298
299 static __inline__ int
300 SYM53C500_pio_write(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
301 {
302 int i = 0;
303 int len; /* current scsi fifo size */
304
305 REG1(base);
306 while (reqlen && !(i & 0x40)) {
307 i = inb(base + PIO_STATUS);
308 /* VDEB(printk("pio_status=%x\n", i)); */
309 if (i & 0x80) /* error */
310 return 0;
311
312 switch (i & 0x1e) {
313 case 0x10:
314 len = 128;
315 break;
316 case 0x0:
317 len = 84;
318 break;
319 case 0x8:
320 len = 42;
321 break;
322 case 0xc:
323 len = 1;
324 break;
325 default:
326 case 0xe:
327 len = 0;
328 break;
329 }
330
331 if (len) {
332 if (len > reqlen)
333 len = reqlen;
334
335 if (fast_pio && len > 3) {
336 outsl(base + PIO_FIFO, request, len >> 2);
337 request += len & 0xfc;
338 reqlen -= len & 0xfc;
339 } else {
340 while (len--) {
341 outb(*request++, base + PIO_FIFO);
342 reqlen--;
343 }
344 }
345 }
346 }
347 return 0;
348 }
349
350 static irqreturn_t
351 SYM53C500_intr(int irq, void *dev_id)
352 {
353 unsigned long flags;
354 struct Scsi_Host *dev = dev_id;
355 DEB(unsigned char fifo_size;)
356 DEB(unsigned char seq_reg;)
357 unsigned char status, int_reg;
358 unsigned char pio_status;
359 int port_base = dev->io_port;
360 struct sym53c500_data *data =
361 (struct sym53c500_data *)dev->hostdata;
362 struct scsi_cmnd *curSC = data->current_SC;
363 int fast_pio = data->fast_pio;
364
365 spin_lock_irqsave(dev->host_lock, flags);
366
367 VDEB(printk("SYM53C500_intr called\n"));
368
369 REG1(port_base);
370 pio_status = inb(port_base + PIO_STATUS);
371 REG0(port_base);
372 status = inb(port_base + STAT_REG);
373 DEB(seq_reg = inb(port_base + SEQ_REG));
374 int_reg = inb(port_base + INT_REG);
375 DEB(fifo_size = inb(port_base + FIFO_FLAGS) & 0x1f);
376
377 #if SYM53C500_DEBUG
378 printk("status=%02x, seq_reg=%02x, int_reg=%02x, fifo_size=%02x",
379 status, seq_reg, int_reg, fifo_size);
380 printk(", pio=%02x\n", pio_status);
381 #endif /* SYM53C500_DEBUG */
382
383 if (int_reg & 0x80) { /* SCSI reset intr */
384 DEB(printk("SYM53C500: reset intr received\n"));
385 curSC->result = DID_RESET << 16;
386 goto idle_out;
387 }
388
389 if (pio_status & 0x80) {
390 printk("SYM53C500: Warning: PIO error!\n");
391 curSC->result = DID_ERROR << 16;
392 goto idle_out;
393 }
394
395 if (status & 0x20) { /* Parity error */
396 printk("SYM53C500: Warning: parity error!\n");
397 curSC->result = DID_PARITY << 16;
398 goto idle_out;
399 }
400
401 if (status & 0x40) { /* Gross error */
402 printk("SYM53C500: Warning: gross error!\n");
403 curSC->result = DID_ERROR << 16;
404 goto idle_out;
405 }
406
407 if (int_reg & 0x20) { /* Disconnect */
408 DEB(printk("SYM53C500: disconnect intr received\n"));
409 if (curSC->SCp.phase != message_in) { /* Unexpected disconnect */
410 curSC->result = DID_NO_CONNECT << 16;
411 } else { /* Command complete, return status and message */
412 curSC->result = (curSC->SCp.Status & 0xff)
413 | ((curSC->SCp.Message & 0xff) << 8) | (DID_OK << 16);
414 }
415 goto idle_out;
416 }
417
418 switch (status & 0x07) { /* scsi phase */
419 case 0x00: /* DATA-OUT */
420 if (int_reg & 0x10) { /* Target requesting info transfer */
421 struct scatterlist *sg;
422 int i;
423
424 curSC->SCp.phase = data_out;
425 VDEB(printk("SYM53C500: Data-Out phase\n"));
426 outb(FLUSH_FIFO, port_base + CMD_REG);
427 LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
428 outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
429
430 scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
431 SYM53C500_pio_write(fast_pio, port_base,
432 sg_virt(sg), sg->length);
433 }
434 REG0(port_base);
435 }
436 break;
437
438 case 0x01: /* DATA-IN */
439 if (int_reg & 0x10) { /* Target requesting info transfer */
440 struct scatterlist *sg;
441 int i;
442
443 curSC->SCp.phase = data_in;
444 VDEB(printk("SYM53C500: Data-In phase\n"));
445 outb(FLUSH_FIFO, port_base + CMD_REG);
446 LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
447 outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
448
449 scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
450 SYM53C500_pio_read(fast_pio, port_base,
451 sg_virt(sg), sg->length);
452 }
453 REG0(port_base);
454 }
455 break;
456
457 case 0x02: /* COMMAND */
458 curSC->SCp.phase = command_ph;
459 printk("SYM53C500: Warning: Unknown interrupt occurred in command phase!\n");
460 break;
461
462 case 0x03: /* STATUS */
463 curSC->SCp.phase = status_ph;
464 VDEB(printk("SYM53C500: Status phase\n"));
465 outb(FLUSH_FIFO, port_base + CMD_REG);
466 outb(INIT_CMD_COMPLETE, port_base + CMD_REG);
467 break;
468
469 case 0x04: /* Reserved */
470 case 0x05: /* Reserved */
471 printk("SYM53C500: WARNING: Reserved phase!!!\n");
472 break;
473
474 case 0x06: /* MESSAGE-OUT */
475 DEB(printk("SYM53C500: Message-Out phase\n"));
476 curSC->SCp.phase = message_out;
477 outb(SET_ATN, port_base + CMD_REG); /* Reject the message */
478 outb(MSG_ACCEPT, port_base + CMD_REG);
479 break;
480
481 case 0x07: /* MESSAGE-IN */
482 VDEB(printk("SYM53C500: Message-In phase\n"));
483 curSC->SCp.phase = message_in;
484
485 curSC->SCp.Status = inb(port_base + SCSI_FIFO);
486 curSC->SCp.Message = inb(port_base + SCSI_FIFO);
487
488 VDEB(printk("SCSI FIFO size=%d\n", inb(port_base + FIFO_FLAGS) & 0x1f));
489 DEB(printk("Status = %02x Message = %02x\n", curSC->SCp.Status, curSC->SCp.Message));
490
491 if (curSC->SCp.Message == SAVE_POINTERS || curSC->SCp.Message == DISCONNECT) {
492 outb(SET_ATN, port_base + CMD_REG); /* Reject message */
493 DEB(printk("Discarding SAVE_POINTERS message\n"));
494 }
495 outb(MSG_ACCEPT, port_base + CMD_REG);
496 break;
497 }
498 out:
499 spin_unlock_irqrestore(dev->host_lock, flags);
500 return IRQ_HANDLED;
501
502 idle_out:
503 curSC->SCp.phase = idle;
504 curSC->scsi_done(curSC);
505 goto out;
506 }
507
508 static void
509 SYM53C500_release(struct pcmcia_device *link)
510 {
511 struct scsi_info_t *info = link->priv;
512 struct Scsi_Host *shost = info->host;
513
514 dev_dbg(&link->dev, "SYM53C500_release\n");
515
516 /*
517 * Do this before releasing/freeing resources.
518 */
519 scsi_remove_host(shost);
520
521 /*
522 * Interrupts getting hosed on card removal. Try
523 * the following code, mostly from qlogicfas.c.
524 */
525 if (shost->irq)
526 free_irq(shost->irq, shost);
527 if (shost->io_port && shost->n_io_port)
528 release_region(shost->io_port, shost->n_io_port);
529
530 pcmcia_disable_device(link);
531
532 scsi_host_put(shost);
533 } /* SYM53C500_release */
534
535 static const char*
536 SYM53C500_info(struct Scsi_Host *SChost)
537 {
538 static char info_msg[256];
539 struct sym53c500_data *data =
540 (struct sym53c500_data *)SChost->hostdata;
541
542 DEB(printk("SYM53C500_info called\n"));
543 (void)snprintf(info_msg, sizeof(info_msg),
544 "SYM53C500 at 0x%lx, IRQ %d, %s PIO mode.",
545 SChost->io_port, SChost->irq, data->fast_pio ? "fast" : "slow");
546 return (info_msg);
547 }
548
549 static int
550 SYM53C500_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
551 {
552 int i;
553 int port_base = SCpnt->device->host->io_port;
554 struct sym53c500_data *data =
555 (struct sym53c500_data *)SCpnt->device->host->hostdata;
556
557 VDEB(printk("SYM53C500_queue called\n"));
558
559 DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%d\n",
560 SCpnt->cmnd[0], SCpnt->cmd_len, SCpnt->device->id,
561 SCpnt->device->lun, scsi_bufflen(SCpnt)));
562
563 VDEB(for (i = 0; i < SCpnt->cmd_len; i++)
564 printk("cmd[%d]=%02x ", i, SCpnt->cmnd[i]));
565 VDEB(printk("\n"));
566
567 data->current_SC = SCpnt;
568 data->current_SC->scsi_done = done;
569 data->current_SC->SCp.phase = command_ph;
570 data->current_SC->SCp.Status = 0;
571 data->current_SC->SCp.Message = 0;
572
573 /* We are locked here already by the mid layer */
574 REG0(port_base);
575 outb(scmd_id(SCpnt), port_base + DEST_ID); /* set destination */
576 outb(FLUSH_FIFO, port_base + CMD_REG); /* reset the fifos */
577
578 for (i = 0; i < SCpnt->cmd_len; i++) {
579 outb(SCpnt->cmnd[i], port_base + SCSI_FIFO);
580 }
581 outb(SELECT_NO_ATN, port_base + CMD_REG);
582
583 return 0;
584 }
585
586 static DEF_SCSI_QCMD(SYM53C500_queue)
587
588 static int
589 SYM53C500_host_reset(struct scsi_cmnd *SCpnt)
590 {
591 int port_base = SCpnt->device->host->io_port;
592
593 DEB(printk("SYM53C500_host_reset called\n"));
594 spin_lock_irq(SCpnt->device->host->host_lock);
595 SYM53C500_int_host_reset(port_base);
596 spin_unlock_irq(SCpnt->device->host->host_lock);
597
598 return SUCCESS;
599 }
600
601 static int
602 SYM53C500_biosparm(struct scsi_device *disk,
603 struct block_device *dev,
604 sector_t capacity, int *info_array)
605 {
606 int size;
607
608 DEB(printk("SYM53C500_biosparm called\n"));
609
610 size = capacity;
611 info_array[0] = 64; /* heads */
612 info_array[1] = 32; /* sectors */
613 info_array[2] = size >> 11; /* cylinders */
614 if (info_array[2] > 1024) { /* big disk */
615 info_array[0] = 255;
616 info_array[1] = 63;
617 info_array[2] = size / (255 * 63);
618 }
619 return 0;
620 }
621
622 static ssize_t
623 SYM53C500_show_pio(struct device *dev, struct device_attribute *attr,
624 char *buf)
625 {
626 struct Scsi_Host *SHp = class_to_shost(dev);
627 struct sym53c500_data *data =
628 (struct sym53c500_data *)SHp->hostdata;
629
630 return snprintf(buf, 4, "%d\n", data->fast_pio);
631 }
632
633 static ssize_t
634 SYM53C500_store_pio(struct device *dev, struct device_attribute *attr,
635 const char *buf, size_t count)
636 {
637 int pio;
638 struct Scsi_Host *SHp = class_to_shost(dev);
639 struct sym53c500_data *data =
640 (struct sym53c500_data *)SHp->hostdata;
641
642 pio = simple_strtoul(buf, NULL, 0);
643 if (pio == 0 || pio == 1) {
644 data->fast_pio = pio;
645 return count;
646 }
647 else
648 return -EINVAL;
649 }
650
651 /*
652 * SCSI HBA device attributes we want to
653 * make available via sysfs.
654 */
655 static struct device_attribute SYM53C500_pio_attr = {
656 .attr = {
657 .name = "fast_pio",
658 .mode = (S_IRUGO | S_IWUSR),
659 },
660 .show = SYM53C500_show_pio,
661 .store = SYM53C500_store_pio,
662 };
663
664 static struct device_attribute *SYM53C500_shost_attrs[] = {
665 &SYM53C500_pio_attr,
666 NULL,
667 };
668
669 /*
670 * scsi_host_template initializer
671 */
672 static struct scsi_host_template sym53c500_driver_template = {
673 .module = THIS_MODULE,
674 .name = "SYM53C500",
675 .info = SYM53C500_info,
676 .queuecommand = SYM53C500_queue,
677 .eh_host_reset_handler = SYM53C500_host_reset,
678 .bios_param = SYM53C500_biosparm,
679 .proc_name = "SYM53C500",
680 .can_queue = 1,
681 .this_id = 7,
682 .sg_tablesize = 32,
683 .cmd_per_lun = 1,
684 .use_clustering = ENABLE_CLUSTERING,
685 .shost_attrs = SYM53C500_shost_attrs
686 };
687
688 static int SYM53C500_config_check(struct pcmcia_device *p_dev, void *priv_data)
689 {
690 p_dev->io_lines = 10;
691 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
692 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
693
694 if (p_dev->resource[0]->start == 0)
695 return -ENODEV;
696
697 return pcmcia_request_io(p_dev);
698 }
699
700 static int
701 SYM53C500_config(struct pcmcia_device *link)
702 {
703 struct scsi_info_t *info = link->priv;
704 int ret;
705 int irq_level, port_base;
706 struct Scsi_Host *host;
707 struct scsi_host_template *tpnt = &sym53c500_driver_template;
708 struct sym53c500_data *data;
709
710 dev_dbg(&link->dev, "SYM53C500_config\n");
711
712 info->manf_id = link->manf_id;
713
714 ret = pcmcia_loop_config(link, SYM53C500_config_check, NULL);
715 if (ret)
716 goto failed;
717
718 if (!link->irq)
719 goto failed;
720
721 ret = pcmcia_enable_device(link);
722 if (ret)
723 goto failed;
724
725 /*
726 * That's the trouble with copying liberally from another driver.
727 * Some things probably aren't relevant, and I suspect this entire
728 * section dealing with manufacturer IDs can be scrapped. --rct
729 */
730 if ((info->manf_id == MANFID_MACNICA) ||
731 (info->manf_id == MANFID_PIONEER) ||
732 (info->manf_id == 0x0098)) {
733 /* set ATAcmd */
734 outb(0xb4, link->resource[0]->start + 0xd);
735 outb(0x24, link->resource[0]->start + 0x9);
736 outb(0x04, link->resource[0]->start + 0xd);
737 }
738
739 /*
740 * irq_level == 0 implies tpnt->can_queue == 0, which
741 * is not supported in 2.6. Thus, only irq_level > 0
742 * will be allowed.
743 *
744 * Possible port_base values are as follows:
745 *
746 * 0x130, 0x230, 0x280, 0x290,
747 * 0x320, 0x330, 0x340, 0x350
748 */
749 port_base = link->resource[0]->start;
750 irq_level = link->irq;
751
752 DEB(printk("SYM53C500: port_base=0x%x, irq=%d, fast_pio=%d\n",
753 port_base, irq_level, USE_FAST_PIO);)
754
755 chip_init(port_base);
756
757 host = scsi_host_alloc(tpnt, sizeof(struct sym53c500_data));
758 if (!host) {
759 printk("SYM53C500: Unable to register host, giving up.\n");
760 goto err_release;
761 }
762
763 data = (struct sym53c500_data *)host->hostdata;
764
765 if (irq_level > 0) {
766 if (request_irq(irq_level, SYM53C500_intr, IRQF_SHARED, "SYM53C500", host)) {
767 printk("SYM53C500: unable to allocate IRQ %d\n", irq_level);
768 goto err_free_scsi;
769 }
770 DEB(printk("SYM53C500: allocated IRQ %d\n", irq_level));
771 } else if (irq_level == 0) {
772 DEB(printk("SYM53C500: No interrupts detected\n"));
773 goto err_free_scsi;
774 } else {
775 DEB(printk("SYM53C500: Shouldn't get here!\n"));
776 goto err_free_scsi;
777 }
778
779 host->unique_id = port_base;
780 host->irq = irq_level;
781 host->io_port = port_base;
782 host->n_io_port = 0x10;
783 host->dma_channel = -1;
784
785 /*
786 * Note fast_pio is set to USE_FAST_PIO by
787 * default, but can be changed via "sysfs".
788 */
789 data->fast_pio = USE_FAST_PIO;
790
791 info->host = host;
792
793 if (scsi_add_host(host, NULL))
794 goto err_free_irq;
795
796 scsi_scan_host(host);
797
798 return 0;
799
800 err_free_irq:
801 free_irq(irq_level, host);
802 err_free_scsi:
803 scsi_host_put(host);
804 err_release:
805 release_region(port_base, 0x10);
806 printk(KERN_INFO "sym53c500_cs: no SCSI devices found\n");
807 return -ENODEV;
808
809 failed:
810 SYM53C500_release(link);
811 return -ENODEV;
812 } /* SYM53C500_config */
813
814 static int sym53c500_resume(struct pcmcia_device *link)
815 {
816 struct scsi_info_t *info = link->priv;
817
818 /* See earlier comment about manufacturer IDs. */
819 if ((info->manf_id == MANFID_MACNICA) ||
820 (info->manf_id == MANFID_PIONEER) ||
821 (info->manf_id == 0x0098)) {
822 outb(0x80, link->resource[0]->start + 0xd);
823 outb(0x24, link->resource[0]->start + 0x9);
824 outb(0x04, link->resource[0]->start + 0xd);
825 }
826 /*
827 * If things don't work after a "resume",
828 * this is a good place to start looking.
829 */
830 SYM53C500_int_host_reset(link->resource[0]->start);
831
832 return 0;
833 }
834
835 static void
836 SYM53C500_detach(struct pcmcia_device *link)
837 {
838 dev_dbg(&link->dev, "SYM53C500_detach\n");
839
840 SYM53C500_release(link);
841
842 kfree(link->priv);
843 link->priv = NULL;
844 } /* SYM53C500_detach */
845
846 static int
847 SYM53C500_probe(struct pcmcia_device *link)
848 {
849 struct scsi_info_t *info;
850
851 dev_dbg(&link->dev, "SYM53C500_attach()\n");
852
853 /* Create new SCSI device */
854 info = kzalloc(sizeof(*info), GFP_KERNEL);
855 if (!info)
856 return -ENOMEM;
857 info->p_dev = link;
858 link->priv = info;
859 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
860
861 return SYM53C500_config(link);
862 } /* SYM53C500_attach */
863
864 MODULE_AUTHOR("Bob Tracy <rct@frus.com>");
865 MODULE_DESCRIPTION("SYM53C500 PCMCIA SCSI driver");
866 MODULE_LICENSE("GPL");
867
868 static struct pcmcia_device_id sym53c500_ids[] = {
869 PCMCIA_DEVICE_PROD_ID12("BASICS by New Media Corporation", "SCSI Sym53C500", 0x23c78a9d, 0x0099e7f7),
870 PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "SCSI Bus Toaster Sym53C500", 0x085a850b, 0x45432eb8),
871 PCMCIA_DEVICE_PROD_ID2("SCSI9000", 0x21648f44),
872 PCMCIA_DEVICE_NULL,
873 };
874 MODULE_DEVICE_TABLE(pcmcia, sym53c500_ids);
875
876 static struct pcmcia_driver sym53c500_cs_driver = {
877 .owner = THIS_MODULE,
878 .name = "sym53c500_cs",
879 .probe = SYM53C500_probe,
880 .remove = SYM53C500_detach,
881 .id_table = sym53c500_ids,
882 .resume = sym53c500_resume,
883 };
884
885 static int __init
886 init_sym53c500_cs(void)
887 {
888 return pcmcia_register_driver(&sym53c500_cs_driver);
889 }
890
891 static void __exit
892 exit_sym53c500_cs(void)
893 {
894 pcmcia_unregister_driver(&sym53c500_cs_driver);
895 }
896
897 module_init(init_sym53c500_cs);
898 module_exit(exit_sym53c500_cs);