1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * sym53c500_cs.c Bob Tracy (rct@frus.com)
4 *
5 * A rewrite of the pcmcia-cs add-on driver for newer (circa 1997)
6 * New Media Bus Toaster PCMCIA SCSI cards using the Symbios Logic
7 * 53c500 controller: intended for use with 2.6 and later kernels.
8 * The pcmcia-cs add-on version of this driver is not supported
9 * beyond 2.4. It consisted of three files with history/copyright
10 * information as follows:
11 *
12 * SYM53C500.h
13 * Bob Tracy (rct@frus.com)
14 * Original by Tom Corner (tcorner@via.at).
15 * Adapted from NCR53c406a.h which is Copyrighted (C) 1994
16 * Normunds Saumanis (normunds@rx.tech.swh.lv)
17 *
18 * SYM53C500.c
19 * Bob Tracy (rct@frus.com)
20 * Original driver by Tom Corner (tcorner@via.at) was adapted
21 * from NCR53c406a.c which is Copyrighted (C) 1994, 1995, 1996
22 * Normunds Saumanis (normunds@fi.ibm.com)
23 *
24 * sym53c500.c
25 * Bob Tracy (rct@frus.com)
26 * Original by Tom Corner (tcorner@via.at) was adapted from a
27 * driver for the Qlogic SCSI card written by
28 * David Hinds (dhinds@allegro.stanford.edu).
29 */
30
31 #define SYM53C500_DEBUG 0
32 #define VERBOSE_SYM53C500_DEBUG 0
33
34 /*
35 * Set this to 0 if you encounter kernel lockups while transferring
36 * data in PIO mode. Note this can be changed via "sysfs".
37 */
38 #define USE_FAST_PIO 1
39
40 /* =============== End of user configurable parameters ============== */
41
42 #include <linux/module.h>
43 #include <linux/moduleparam.h>
44 #include <linux/errno.h>
45 #include <linux/init.h>
46 #include <linux/interrupt.h>
47 #include <linux/kernel.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/ioport.h>
51 #include <linux/blkdev.h>
52 #include <linux/spinlock.h>
53 #include <linux/bitops.h>
54
55 #include <asm/io.h>
56 #include <asm/dma.h>
57 #include <asm/irq.h>
58
59 #include <scsi/scsi_ioctl.h>
60 #include <scsi/scsi_cmnd.h>
61 #include <scsi/scsi_device.h>
62 #include <scsi/scsi.h>
63 #include <scsi/scsi_host.h>
64
65 #include <pcmcia/cistpl.h>
66 #include <pcmcia/ds.h>
67 #include <pcmcia/ciscode.h>
68
69
70 /* ================================================================== */
71
72 #define SYNC_MODE 0 /* Synchronous transfer mode */
73
74 /* Default configuration */
75 #define C1_IMG 0x07 /* ID=7 */
76 #define C2_IMG 0x48 /* FE SCSI2 */
77 #define C3_IMG 0x20 /* CDB */
78 #define C4_IMG 0x04 /* ANE */
79 #define C5_IMG 0xa4 /* ? changed from b6= AA PI SIE POL */
80 #define C7_IMG 0x80 /* added for SYM53C500 t. corner */
81
82 /* Hardware Registers: offsets from io_port (base) */
83
84 /* Control Register Set 0 */
85 #define TC_LSB 0x00 /* transfer counter lsb */
86 #define TC_MSB 0x01 /* transfer counter msb */
87 #define SCSI_FIFO 0x02 /* scsi fifo register */
88 #define CMD_REG 0x03 /* command register */
89 #define STAT_REG 0x04 /* status register */
90 #define DEST_ID 0x04 /* selection/reselection bus id */
91 #define INT_REG 0x05 /* interrupt status register */
92 #define SRTIMOUT 0x05 /* select/reselect timeout reg */
93 #define SEQ_REG 0x06 /* sequence step register */
94 #define SYNCPRD 0x06 /* synchronous transfer period */
95 #define FIFO_FLAGS 0x07 /* indicates # of bytes in fifo */
96 #define SYNCOFF 0x07 /* synchronous offset register */
97 #define CONFIG1 0x08 /* configuration register */
98 #define CLKCONV 0x09 /* clock conversion register */
99 /* #define TESTREG 0x0A */ /* test mode register */
100 #define CONFIG2 0x0B /* configuration 2 register */
101 #define CONFIG3 0x0C /* configuration 3 register */
102 #define CONFIG4 0x0D /* configuration 4 register */
103 #define TC_HIGH 0x0E /* transfer counter high */
104 /* #define FIFO_BOTTOM 0x0F */ /* reserve FIFO byte register */
105
106 /* Control Register Set 1 */
107 /* #define JUMPER_SENSE 0x00 */ /* jumper sense port reg (r/w) */
108 /* #define SRAM_PTR 0x01 */ /* SRAM address pointer reg (r/w) */
109 /* #define SRAM_DATA 0x02 */ /* SRAM data register (r/w) */
110 #define PIO_FIFO 0x04 /* PIO FIFO registers (r/w) */
111 /* #define PIO_FIFO1 0x05 */ /* */
112 /* #define PIO_FIFO2 0x06 */ /* */
113 /* #define PIO_FIFO3 0x07 */ /* */
114 #define PIO_STATUS 0x08 /* PIO status (r/w) */
115 /* #define ATA_CMD 0x09 */ /* ATA command/status reg (r/w) */
116 /* #define ATA_ERR 0x0A */ /* ATA features/error reg (r/w) */
117 #define PIO_FLAG 0x0B /* PIO flag interrupt enable (r/w) */
118 #define CONFIG5 0x09 /* configuration 5 register */
119 /* #define SIGNATURE 0x0E */ /* signature register (r) */
120 /* #define CONFIG6 0x0F */ /* configuration 6 register (r) */
121 #define CONFIG7 0x0d
122
123 /* select register set 0 */
124 #define REG0(x) (outb(C4_IMG, (x) + CONFIG4))
125 /* select register set 1 */
126 #define REG1(x) outb(C7_IMG, (x) + CONFIG7); outb(C5_IMG, (x) + CONFIG5)
127
128 #if SYM53C500_DEBUG
129 #define DEB(x) x
130 #else
131 #define DEB(x)
132 #endif
133
134 #if VERBOSE_SYM53C500_DEBUG
135 #define VDEB(x) x
136 #else
137 #define VDEB(x)
138 #endif
139
140 #define LOAD_DMA_COUNT(x, count) \
141 outb(count & 0xff, (x) + TC_LSB); \
142 outb((count >> 8) & 0xff, (x) + TC_MSB); \
143 outb((count >> 16) & 0xff, (x) + TC_HIGH);
144
145 /* Chip commands */
146 #define DMA_OP 0x80
147
148 #define SCSI_NOP 0x00
149 #define FLUSH_FIFO 0x01
150 #define CHIP_RESET 0x02
151 #define SCSI_RESET 0x03
152 #define RESELECT 0x40
153 #define SELECT_NO_ATN 0x41
154 #define SELECT_ATN 0x42
155 #define SELECT_ATN_STOP 0x43
156 #define ENABLE_SEL 0x44
157 #define DISABLE_SEL 0x45
158 #define SELECT_ATN3 0x46
159 #define RESELECT3 0x47
160 #define TRANSFER_INFO 0x10
161 #define INIT_CMD_COMPLETE 0x11
162 #define MSG_ACCEPT 0x12
163 #define TRANSFER_PAD 0x18
164 #define SET_ATN 0x1a
165 #define RESET_ATN 0x1b
166 #define SEND_MSG 0x20
167 #define SEND_STATUS 0x21
168 #define SEND_DATA 0x22
169 #define DISCONN_SEQ 0x23
170 #define TERMINATE_SEQ 0x24
171 #define TARG_CMD_COMPLETE 0x25
172 #define DISCONN 0x27
173 #define RECV_MSG 0x28
174 #define RECV_CMD 0x29
175 #define RECV_DATA 0x2a
176 #define RECV_CMD_SEQ 0x2b
177 #define TARGET_ABORT_DMA 0x04
178
179 /* ================================================================== */
180
181 struct scsi_info_t {
182 struct pcmcia_device *p_dev;
183 struct Scsi_Host *host;
184 unsigned short manf_id;
185 };
186
187 /*
188 * Repository for per-instance host data.
189 */
190 struct sym53c500_data {
191 struct scsi_cmnd *current_SC;
192 int fast_pio;
193 };
194
195 enum Phase {
196 idle,
197 data_out,
198 data_in,
199 command_ph,
200 status_ph,
201 message_out,
202 message_in
203 };
204
205 /* ================================================================== */
206
207 static void
chip_init(int io_port)208 chip_init(int io_port)
209 {
210 REG1(io_port);
211 outb(0x01, io_port + PIO_STATUS);
212 outb(0x00, io_port + PIO_FLAG);
213
214 outb(C4_IMG, io_port + CONFIG4); /* REG0(io_port); */
215 outb(C3_IMG, io_port + CONFIG3);
216 outb(C2_IMG, io_port + CONFIG2);
217 outb(C1_IMG, io_port + CONFIG1);
218
219 outb(0x05, io_port + CLKCONV); /* clock conversion factor */
220 outb(0x9C, io_port + SRTIMOUT); /* Selection timeout */
221 outb(0x05, io_port + SYNCPRD); /* Synchronous transfer period */
222 outb(SYNC_MODE, io_port + SYNCOFF); /* synchronous mode */
223 }
224
225 static void
SYM53C500_int_host_reset(int io_port)226 SYM53C500_int_host_reset(int io_port)
227 {
228 outb(C4_IMG, io_port + CONFIG4); /* REG0(io_port); */
229 outb(CHIP_RESET, io_port + CMD_REG);
230 outb(SCSI_NOP, io_port + CMD_REG); /* required after reset */
231 outb(SCSI_RESET, io_port + CMD_REG);
232 chip_init(io_port);
233 }
234
235 static __inline__ int
SYM53C500_pio_read(int fast_pio,int base,unsigned char * request,unsigned int reqlen)236 SYM53C500_pio_read(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
237 {
238 int i;
239 int len; /* current scsi fifo size */
240
241 REG1(base);
242 while (reqlen) {
243 i = inb(base + PIO_STATUS);
244 /* VDEB(printk("pio_status=%x\n", i)); */
245 if (i & 0x80)
246 return 0;
247
248 switch (i & 0x1e) {
249 default:
250 case 0x10: /* fifo empty */
251 len = 0;
252 break;
253 case 0x0:
254 len = 1;
255 break;
256 case 0x8: /* fifo 1/3 full */
257 len = 42;
258 break;
259 case 0xc: /* fifo 2/3 full */
260 len = 84;
261 break;
262 case 0xe: /* fifo full */
263 len = 128;
264 break;
265 }
266
267 if ((i & 0x40) && len == 0) { /* fifo empty and interrupt occurred */
268 return 0;
269 }
270
271 if (len) {
272 if (len > reqlen)
273 len = reqlen;
274
275 if (fast_pio && len > 3) {
276 insl(base + PIO_FIFO, request, len >> 2);
277 request += len & 0xfc;
278 reqlen -= len & 0xfc;
279 } else {
280 while (len--) {
281 *request++ = inb(base + PIO_FIFO);
282 reqlen--;
283 }
284 }
285 }
286 }
287 return 0;
288 }
289
290 static __inline__ int
SYM53C500_pio_write(int fast_pio,int base,unsigned char * request,unsigned int reqlen)291 SYM53C500_pio_write(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
292 {
293 int i = 0;
294 int len; /* current scsi fifo size */
295
296 REG1(base);
297 while (reqlen && !(i & 0x40)) {
298 i = inb(base + PIO_STATUS);
299 /* VDEB(printk("pio_status=%x\n", i)); */
300 if (i & 0x80) /* error */
301 return 0;
302
303 switch (i & 0x1e) {
304 case 0x10:
305 len = 128;
306 break;
307 case 0x0:
308 len = 84;
309 break;
310 case 0x8:
311 len = 42;
312 break;
313 case 0xc:
314 len = 1;
315 break;
316 default:
317 case 0xe:
318 len = 0;
319 break;
320 }
321
322 if (len) {
323 if (len > reqlen)
324 len = reqlen;
325
326 if (fast_pio && len > 3) {
327 outsl(base + PIO_FIFO, request, len >> 2);
328 request += len & 0xfc;
329 reqlen -= len & 0xfc;
330 } else {
331 while (len--) {
332 outb(*request++, base + PIO_FIFO);
333 reqlen--;
334 }
335 }
336 }
337 }
338 return 0;
339 }
340
341 static irqreturn_t
SYM53C500_intr(int irq,void * dev_id)342 SYM53C500_intr(int irq, void *dev_id)
343 {
344 unsigned long flags;
345 struct Scsi_Host *dev = dev_id;
346 DEB(unsigned char fifo_size;)
347 DEB(unsigned char seq_reg;)
348 unsigned char status, int_reg;
349 unsigned char pio_status;
350 int port_base = dev->io_port;
351 struct sym53c500_data *data =
352 (struct sym53c500_data *)dev->hostdata;
353 struct scsi_cmnd *curSC = data->current_SC;
354 int fast_pio = data->fast_pio;
355
356 spin_lock_irqsave(dev->host_lock, flags);
357
358 VDEB(printk("SYM53C500_intr called\n"));
359
360 REG1(port_base);
361 pio_status = inb(port_base + PIO_STATUS);
362 REG0(port_base);
363 status = inb(port_base + STAT_REG);
364 DEB(seq_reg = inb(port_base + SEQ_REG));
365 int_reg = inb(port_base + INT_REG);
366 DEB(fifo_size = inb(port_base + FIFO_FLAGS) & 0x1f);
367
368 #if SYM53C500_DEBUG
369 printk("status=%02x, seq_reg=%02x, int_reg=%02x, fifo_size=%02x",
370 status, seq_reg, int_reg, fifo_size);
371 printk(", pio=%02x\n", pio_status);
372 #endif /* SYM53C500_DEBUG */
373
374 if (int_reg & 0x80) { /* SCSI reset intr */
375 DEB(printk("SYM53C500: reset intr received\n"));
376 curSC->result = DID_RESET << 16;
377 goto idle_out;
378 }
379
380 if (pio_status & 0x80) {
381 printk("SYM53C500: Warning: PIO error!\n");
382 curSC->result = DID_ERROR << 16;
383 goto idle_out;
384 }
385
386 if (status & 0x20) { /* Parity error */
387 printk("SYM53C500: Warning: parity error!\n");
388 curSC->result = DID_PARITY << 16;
389 goto idle_out;
390 }
391
392 if (status & 0x40) { /* Gross error */
393 printk("SYM53C500: Warning: gross error!\n");
394 curSC->result = DID_ERROR << 16;
395 goto idle_out;
396 }
397
398 if (int_reg & 0x20) { /* Disconnect */
399 DEB(printk("SYM53C500: disconnect intr received\n"));
400 if (curSC->SCp.phase != message_in) { /* Unexpected disconnect */
401 curSC->result = DID_NO_CONNECT << 16;
402 } else { /* Command complete, return status and message */
403 curSC->result = (curSC->SCp.Status & 0xff)
404 | ((curSC->SCp.Message & 0xff) << 8) | (DID_OK << 16);
405 }
406 goto idle_out;
407 }
408
409 switch (status & 0x07) { /* scsi phase */
410 case 0x00: /* DATA-OUT */
411 if (int_reg & 0x10) { /* Target requesting info transfer */
412 struct scatterlist *sg;
413 int i;
414
415 curSC->SCp.phase = data_out;
416 VDEB(printk("SYM53C500: Data-Out phase\n"));
417 outb(FLUSH_FIFO, port_base + CMD_REG);
418 LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
419 outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
420
421 scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
422 SYM53C500_pio_write(fast_pio, port_base,
423 sg_virt(sg), sg->length);
424 }
425 REG0(port_base);
426 }
427 break;
428
429 case 0x01: /* DATA-IN */
430 if (int_reg & 0x10) { /* Target requesting info transfer */
431 struct scatterlist *sg;
432 int i;
433
434 curSC->SCp.phase = data_in;
435 VDEB(printk("SYM53C500: Data-In phase\n"));
436 outb(FLUSH_FIFO, port_base + CMD_REG);
437 LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
438 outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
439
440 scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
441 SYM53C500_pio_read(fast_pio, port_base,
442 sg_virt(sg), sg->length);
443 }
444 REG0(port_base);
445 }
446 break;
447
448 case 0x02: /* COMMAND */
449 curSC->SCp.phase = command_ph;
450 printk("SYM53C500: Warning: Unknown interrupt occurred in command phase!\n");
451 break;
452
453 case 0x03: /* STATUS */
454 curSC->SCp.phase = status_ph;
455 VDEB(printk("SYM53C500: Status phase\n"));
456 outb(FLUSH_FIFO, port_base + CMD_REG);
457 outb(INIT_CMD_COMPLETE, port_base + CMD_REG);
458 break;
459
460 case 0x04: /* Reserved */
461 case 0x05: /* Reserved */
462 printk("SYM53C500: WARNING: Reserved phase!!!\n");
463 break;
464
465 case 0x06: /* MESSAGE-OUT */
466 DEB(printk("SYM53C500: Message-Out phase\n"));
467 curSC->SCp.phase = message_out;
468 outb(SET_ATN, port_base + CMD_REG); /* Reject the message */
469 outb(MSG_ACCEPT, port_base + CMD_REG);
470 break;
471
472 case 0x07: /* MESSAGE-IN */
473 VDEB(printk("SYM53C500: Message-In phase\n"));
474 curSC->SCp.phase = message_in;
475
476 curSC->SCp.Status = inb(port_base + SCSI_FIFO);
477 curSC->SCp.Message = inb(port_base + SCSI_FIFO);
478
479 VDEB(printk("SCSI FIFO size=%d\n", inb(port_base + FIFO_FLAGS) & 0x1f));
480 DEB(printk("Status = %02x Message = %02x\n", curSC->SCp.Status, curSC->SCp.Message));
481
482 if (curSC->SCp.Message == SAVE_POINTERS || curSC->SCp.Message == DISCONNECT) {
483 outb(SET_ATN, port_base + CMD_REG); /* Reject message */
484 DEB(printk("Discarding SAVE_POINTERS message\n"));
485 }
486 outb(MSG_ACCEPT, port_base + CMD_REG);
487 break;
488 }
489 out:
490 spin_unlock_irqrestore(dev->host_lock, flags);
491 return IRQ_HANDLED;
492
493 idle_out:
494 curSC->SCp.phase = idle;
495 curSC->scsi_done(curSC);
496 goto out;
497 }
498
499 static void
SYM53C500_release(struct pcmcia_device * link)500 SYM53C500_release(struct pcmcia_device *link)
501 {
502 struct scsi_info_t *info = link->priv;
503 struct Scsi_Host *shost = info->host;
504
505 dev_dbg(&link->dev, "SYM53C500_release\n");
506
507 /*
508 * Do this before releasing/freeing resources.
509 */
510 scsi_remove_host(shost);
511
512 /*
513 * Interrupts getting hosed on card removal. Try
514 * the following code, mostly from qlogicfas.c.
515 */
516 if (shost->irq)
517 free_irq(shost->irq, shost);
518 if (shost->io_port && shost->n_io_port)
519 release_region(shost->io_port, shost->n_io_port);
520
521 pcmcia_disable_device(link);
522
523 scsi_host_put(shost);
524 } /* SYM53C500_release */
525
526 static const char*
SYM53C500_info(struct Scsi_Host * SChost)527 SYM53C500_info(struct Scsi_Host *SChost)
528 {
529 static char info_msg[256];
530 struct sym53c500_data *data =
531 (struct sym53c500_data *)SChost->hostdata;
532
533 DEB(printk("SYM53C500_info called\n"));
534 (void)snprintf(info_msg, sizeof(info_msg),
535 "SYM53C500 at 0x%lx, IRQ %d, %s PIO mode.",
536 SChost->io_port, SChost->irq, data->fast_pio ? "fast" : "slow");
537 return (info_msg);
538 }
539
540 static int
SYM53C500_queue_lck(struct scsi_cmnd * SCpnt,void (* done)(struct scsi_cmnd *))541 SYM53C500_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
542 {
543 int i;
544 int port_base = SCpnt->device->host->io_port;
545 struct sym53c500_data *data =
546 (struct sym53c500_data *)SCpnt->device->host->hostdata;
547
548 VDEB(printk("SYM53C500_queue called\n"));
549
550 DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%d\n",
551 SCpnt->cmnd[0], SCpnt->cmd_len, SCpnt->device->id,
552 (u8)SCpnt->device->lun, scsi_bufflen(SCpnt)));
553
554 VDEB(for (i = 0; i < SCpnt->cmd_len; i++)
555 printk("cmd[%d]=%02x ", i, SCpnt->cmnd[i]));
556 VDEB(printk("\n"));
557
558 data->current_SC = SCpnt;
559 data->current_SC->scsi_done = done;
560 data->current_SC->SCp.phase = command_ph;
561 data->current_SC->SCp.Status = 0;
562 data->current_SC->SCp.Message = 0;
563
564 /* We are locked here already by the mid layer */
565 REG0(port_base);
566 outb(scmd_id(SCpnt), port_base + DEST_ID); /* set destination */
567 outb(FLUSH_FIFO, port_base + CMD_REG); /* reset the fifos */
568
569 for (i = 0; i < SCpnt->cmd_len; i++) {
570 outb(SCpnt->cmnd[i], port_base + SCSI_FIFO);
571 }
572 outb(SELECT_NO_ATN, port_base + CMD_REG);
573
574 return 0;
575 }
576
DEF_SCSI_QCMD(SYM53C500_queue)577 static DEF_SCSI_QCMD(SYM53C500_queue)
578
579 static int
580 SYM53C500_host_reset(struct scsi_cmnd *SCpnt)
581 {
582 int port_base = SCpnt->device->host->io_port;
583
584 DEB(printk("SYM53C500_host_reset called\n"));
585 spin_lock_irq(SCpnt->device->host->host_lock);
586 SYM53C500_int_host_reset(port_base);
587 spin_unlock_irq(SCpnt->device->host->host_lock);
588
589 return SUCCESS;
590 }
591
592 static int
SYM53C500_biosparm(struct scsi_device * disk,struct block_device * dev,sector_t capacity,int * info_array)593 SYM53C500_biosparm(struct scsi_device *disk,
594 struct block_device *dev,
595 sector_t capacity, int *info_array)
596 {
597 int size;
598
599 DEB(printk("SYM53C500_biosparm called\n"));
600
601 size = capacity;
602 info_array[0] = 64; /* heads */
603 info_array[1] = 32; /* sectors */
604 info_array[2] = size >> 11; /* cylinders */
605 if (info_array[2] > 1024) { /* big disk */
606 info_array[0] = 255;
607 info_array[1] = 63;
608 info_array[2] = size / (255 * 63);
609 }
610 return 0;
611 }
612
613 static ssize_t
SYM53C500_show_pio(struct device * dev,struct device_attribute * attr,char * buf)614 SYM53C500_show_pio(struct device *dev, struct device_attribute *attr,
615 char *buf)
616 {
617 struct Scsi_Host *SHp = class_to_shost(dev);
618 struct sym53c500_data *data =
619 (struct sym53c500_data *)SHp->hostdata;
620
621 return snprintf(buf, 4, "%d\n", data->fast_pio);
622 }
623
624 static ssize_t
SYM53C500_store_pio(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)625 SYM53C500_store_pio(struct device *dev, struct device_attribute *attr,
626 const char *buf, size_t count)
627 {
628 int pio;
629 struct Scsi_Host *SHp = class_to_shost(dev);
630 struct sym53c500_data *data =
631 (struct sym53c500_data *)SHp->hostdata;
632
633 pio = simple_strtoul(buf, NULL, 0);
634 if (pio == 0 || pio == 1) {
635 data->fast_pio = pio;
636 return count;
637 }
638 else
639 return -EINVAL;
640 }
641
642 /*
643 * SCSI HBA device attributes we want to
644 * make available via sysfs.
645 */
646 static struct device_attribute SYM53C500_pio_attr = {
647 .attr = {
648 .name = "fast_pio",
649 .mode = (S_IRUGO | S_IWUSR),
650 },
651 .show = SYM53C500_show_pio,
652 .store = SYM53C500_store_pio,
653 };
654
655 static struct device_attribute *SYM53C500_shost_attrs[] = {
656 &SYM53C500_pio_attr,
657 NULL,
658 };
659
660 /*
661 * scsi_host_template initializer
662 */
663 static struct scsi_host_template sym53c500_driver_template = {
664 .module = THIS_MODULE,
665 .name = "SYM53C500",
666 .info = SYM53C500_info,
667 .queuecommand = SYM53C500_queue,
668 .eh_host_reset_handler = SYM53C500_host_reset,
669 .bios_param = SYM53C500_biosparm,
670 .proc_name = "SYM53C500",
671 .can_queue = 1,
672 .this_id = 7,
673 .sg_tablesize = 32,
674 .shost_attrs = SYM53C500_shost_attrs
675 };
676
SYM53C500_config_check(struct pcmcia_device * p_dev,void * priv_data)677 static int SYM53C500_config_check(struct pcmcia_device *p_dev, void *priv_data)
678 {
679 p_dev->io_lines = 10;
680 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
681 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
682
683 if (p_dev->resource[0]->start == 0)
684 return -ENODEV;
685
686 return pcmcia_request_io(p_dev);
687 }
688
689 static int
SYM53C500_config(struct pcmcia_device * link)690 SYM53C500_config(struct pcmcia_device *link)
691 {
692 struct scsi_info_t *info = link->priv;
693 int ret;
694 int irq_level, port_base;
695 struct Scsi_Host *host;
696 struct scsi_host_template *tpnt = &sym53c500_driver_template;
697 struct sym53c500_data *data;
698
699 dev_dbg(&link->dev, "SYM53C500_config\n");
700
701 info->manf_id = link->manf_id;
702
703 ret = pcmcia_loop_config(link, SYM53C500_config_check, NULL);
704 if (ret)
705 goto failed;
706
707 if (!link->irq)
708 goto failed;
709
710 ret = pcmcia_enable_device(link);
711 if (ret)
712 goto failed;
713
714 /*
715 * That's the trouble with copying liberally from another driver.
716 * Some things probably aren't relevant, and I suspect this entire
717 * section dealing with manufacturer IDs can be scrapped. --rct
718 */
719 if ((info->manf_id == MANFID_MACNICA) ||
720 (info->manf_id == MANFID_PIONEER) ||
721 (info->manf_id == 0x0098)) {
722 /* set ATAcmd */
723 outb(0xb4, link->resource[0]->start + 0xd);
724 outb(0x24, link->resource[0]->start + 0x9);
725 outb(0x04, link->resource[0]->start + 0xd);
726 }
727
728 /*
729 * irq_level == 0 implies tpnt->can_queue == 0, which
730 * is not supported in 2.6. Thus, only irq_level > 0
731 * will be allowed.
732 *
733 * Possible port_base values are as follows:
734 *
735 * 0x130, 0x230, 0x280, 0x290,
736 * 0x320, 0x330, 0x340, 0x350
737 */
738 port_base = link->resource[0]->start;
739 irq_level = link->irq;
740
741 DEB(printk("SYM53C500: port_base=0x%x, irq=%d, fast_pio=%d\n",
742 port_base, irq_level, USE_FAST_PIO);)
743
744 chip_init(port_base);
745
746 host = scsi_host_alloc(tpnt, sizeof(struct sym53c500_data));
747 if (!host) {
748 printk("SYM53C500: Unable to register host, giving up.\n");
749 goto err_release;
750 }
751
752 data = (struct sym53c500_data *)host->hostdata;
753
754 if (irq_level > 0) {
755 if (request_irq(irq_level, SYM53C500_intr, IRQF_SHARED, "SYM53C500", host)) {
756 printk("SYM53C500: unable to allocate IRQ %d\n", irq_level);
757 goto err_free_scsi;
758 }
759 DEB(printk("SYM53C500: allocated IRQ %d\n", irq_level));
760 } else if (irq_level == 0) {
761 DEB(printk("SYM53C500: No interrupts detected\n"));
762 goto err_free_scsi;
763 } else {
764 DEB(printk("SYM53C500: Shouldn't get here!\n"));
765 goto err_free_scsi;
766 }
767
768 host->unique_id = port_base;
769 host->irq = irq_level;
770 host->io_port = port_base;
771 host->n_io_port = 0x10;
772 host->dma_channel = -1;
773
774 /*
775 * Note fast_pio is set to USE_FAST_PIO by
776 * default, but can be changed via "sysfs".
777 */
778 data->fast_pio = USE_FAST_PIO;
779
780 info->host = host;
781
782 if (scsi_add_host(host, NULL))
783 goto err_free_irq;
784
785 scsi_scan_host(host);
786
787 return 0;
788
789 err_free_irq:
790 free_irq(irq_level, host);
791 err_free_scsi:
792 scsi_host_put(host);
793 err_release:
794 release_region(port_base, 0x10);
795 printk(KERN_INFO "sym53c500_cs: no SCSI devices found\n");
796 return -ENODEV;
797
798 failed:
799 SYM53C500_release(link);
800 return -ENODEV;
801 } /* SYM53C500_config */
802
sym53c500_resume(struct pcmcia_device * link)803 static int sym53c500_resume(struct pcmcia_device *link)
804 {
805 struct scsi_info_t *info = link->priv;
806
807 /* See earlier comment about manufacturer IDs. */
808 if ((info->manf_id == MANFID_MACNICA) ||
809 (info->manf_id == MANFID_PIONEER) ||
810 (info->manf_id == 0x0098)) {
811 outb(0x80, link->resource[0]->start + 0xd);
812 outb(0x24, link->resource[0]->start + 0x9);
813 outb(0x04, link->resource[0]->start + 0xd);
814 }
815 /*
816 * If things don't work after a "resume",
817 * this is a good place to start looking.
818 */
819 SYM53C500_int_host_reset(link->resource[0]->start);
820
821 return 0;
822 }
823
824 static void
SYM53C500_detach(struct pcmcia_device * link)825 SYM53C500_detach(struct pcmcia_device *link)
826 {
827 dev_dbg(&link->dev, "SYM53C500_detach\n");
828
829 SYM53C500_release(link);
830
831 kfree(link->priv);
832 link->priv = NULL;
833 } /* SYM53C500_detach */
834
835 static int
SYM53C500_probe(struct pcmcia_device * link)836 SYM53C500_probe(struct pcmcia_device *link)
837 {
838 struct scsi_info_t *info;
839
840 dev_dbg(&link->dev, "SYM53C500_attach()\n");
841
842 /* Create new SCSI device */
843 info = kzalloc(sizeof(*info), GFP_KERNEL);
844 if (!info)
845 return -ENOMEM;
846 info->p_dev = link;
847 link->priv = info;
848 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
849
850 return SYM53C500_config(link);
851 } /* SYM53C500_attach */
852
853 MODULE_AUTHOR("Bob Tracy <rct@frus.com>");
854 MODULE_DESCRIPTION("SYM53C500 PCMCIA SCSI driver");
855 MODULE_LICENSE("GPL");
856
857 static const struct pcmcia_device_id sym53c500_ids[] = {
858 PCMCIA_DEVICE_PROD_ID12("BASICS by New Media Corporation", "SCSI Sym53C500", 0x23c78a9d, 0x0099e7f7),
859 PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "SCSI Bus Toaster Sym53C500", 0x085a850b, 0x45432eb8),
860 PCMCIA_DEVICE_PROD_ID2("SCSI9000", 0x21648f44),
861 PCMCIA_DEVICE_NULL,
862 };
863 MODULE_DEVICE_TABLE(pcmcia, sym53c500_ids);
864
865 static struct pcmcia_driver sym53c500_cs_driver = {
866 .owner = THIS_MODULE,
867 .name = "sym53c500_cs",
868 .probe = SYM53C500_probe,
869 .remove = SYM53C500_detach,
870 .id_table = sym53c500_ids,
871 .resume = sym53c500_resume,
872 };
873 module_pcmcia_driver(sym53c500_cs_driver);
874
