File: /usr/src/linux/drivers/scsi/sym53c416.c
1 /*
2 * sym53c416.c
3 * Low-level SCSI driver for sym53c416 chip.
4 * Copyright (C) 1998 Lieven Willems (lw_linux@hotmail.com)
5 *
6 * Changes :
7 *
8 * Marcelo Tosatti <marcelo@conectiva.com.br> : Added io_request_lock locking
9 * Alan Cox <alan@redhat.com> : Cleaned up code formatting
10 * Fixed an irq locking bug
11 * Added ISAPnP support
12 *
13 * LILO command line usage: sym53c416=<PORTBASE>[,<IRQ>]
14 *
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2, or (at your option) any
18 * later version.
19 *
20 * This program is distributed in the hope that it will be useful, but
21 * WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 * General Public License for more details.
24 *
25 */
26
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/types.h>
30 #include <linux/string.h>
31 #include <linux/ioport.h>
32 #include <linux/sched.h>
33 #include <linux/interrupt.h>
34 #include <linux/delay.h>
35 #include <linux/proc_fs.h>
36 #include <linux/spinlock.h>
37 #include <asm/dma.h>
38 #include <asm/system.h>
39 #include <asm/io.h>
40 #include <linux/blk.h>
41 #include <linux/version.h>
42 #include <linux/isapnp.h>
43 #include "scsi.h"
44 #include "hosts.h"
45 #include "sd.h"
46 #include "sym53c416.h"
47
48 #define VERSION_STRING "Version 1.0.0-ac"
49
50 #define TC_LOW 0x00 /* Transfer counter low */
51 #define TC_MID 0x01 /* Transfer counter mid */
52 #define SCSI_FIFO 0x02 /* SCSI FIFO register */
53 #define COMMAND_REG 0x03 /* Command Register */
54 #define STATUS_REG 0x04 /* Status Register (READ) */
55 #define DEST_BUS_ID 0x04 /* Destination Bus ID (WRITE) */
56 #define INT_REG 0x05 /* Interrupt Register (READ) */
57 #define TOM 0x05 /* Time out multiplier (WRITE) */
58 #define STP 0x06 /* Synchronous Transfer period */
59 #define SYNC_OFFSET 0x07 /* Synchronous Offset */
60 #define CONF_REG_1 0x08 /* Configuration register 1 */
61 #define CONF_REG_2 0x0B /* Configuration register 2 */
62 #define CONF_REG_3 0x0C /* Configuration register 3 */
63 #define CONF_REG_4 0x0D /* Configuration register 4 */
64 #define TC_HIGH 0x0E /* Transfer counter high */
65 #define PIO_FIFO_1 0x10 /* PIO FIFO register 1 */
66 #define PIO_FIFO_2 0x11 /* PIO FIFO register 2 */
67 #define PIO_FIFO_3 0x12 /* PIO FIFO register 3 */
68 #define PIO_FIFO_4 0x13 /* PIO FIFO register 4 */
69 #define PIO_FIFO_CNT 0x14 /* PIO FIFO count */
70 #define PIO_INT_REG 0x15 /* PIO interrupt register */
71 #define CONF_REG_5 0x16 /* Configuration register 5 */
72 #define FEATURE_EN 0x1D /* Feature Enable register */
73
74 /* Configuration register 1 entries: */
75 /* Bits 2-0: SCSI ID of host adapter */
76 #define SCM 0x80 /* Slow Cable Mode */
77 #define SRID 0x40 /* SCSI Reset Interrupt Disable */
78 #define PTM 0x20 /* Parity Test Mode */
79 #define EPC 0x10 /* Enable Parity Checking */
80 #define CTME 0x08 /* Special Test Mode */
81
82 /* Configuration register 2 entries: */
83 #define FE 0x40 /* Features Enable */
84 #define SCSI2 0x08 /* SCSI 2 Enable */
85 #define TBPA 0x04 /* Target Bad Parity Abort */
86
87 /* Configuration register 3 entries: */
88 #define IDMRC 0x80 /* ID Message Reserved Check */
89 #define QTE 0x40 /* Queue Tag Enable */
90 #define CDB10 0x20 /* Command Descriptor Block 10 */
91 #define FSCSI 0x10 /* FastSCSI */
92 #define FCLK 0x08 /* FastClock */
93
94 /* Configuration register 4 entries: */
95 #define RBS 0x08 /* Register bank select */
96 #define EAN 0x04 /* Enable Active Negotiation */
97
98 /* Configuration register 5 entries: */
99 #define LPSR 0x80 /* Lower Power SCSI Reset */
100 #define IE 0x20 /* Interrupt Enable */
101 #define LPM 0x02 /* Low Power Mode */
102 #define WSE0 0x01 /* 0WS Enable */
103
104 /* Interrupt register entries: */
105 #define SRST 0x80 /* SCSI Reset */
106 #define ILCMD 0x40 /* Illegal Command */
107 #define DIS 0x20 /* Disconnect */
108 #define BS 0x10 /* Bus Service */
109 #define FC 0x08 /* Function Complete */
110 #define RESEL 0x04 /* Reselected */
111 #define SI 0x03 /* Selection Interrupt */
112
113 /* Status Register Entries: */
114 #define SCI 0x80 /* SCSI Core Int */
115 #define GE 0x40 /* Gross Error */
116 #define PE 0x20 /* Parity Error */
117 #define TC 0x10 /* Terminal Count */
118 #define VGC 0x08 /* Valid Group Code */
119 #define PHBITS 0x07 /* Phase bits */
120
121 /* PIO Interrupt Register Entries: */
122 #define SCI 0x80 /* SCSI Core Int */
123 #define PFI 0x40 /* PIO FIFO Interrupt */
124 #define FULL 0x20 /* PIO FIFO Full */
125 #define EMPTY 0x10 /* PIO FIFO Empty */
126 #define CE 0x08 /* Collision Error */
127 #define OUE 0x04 /* Overflow / Underflow error */
128 #define FIE 0x02 /* Full Interrupt Enable */
129 #define EIE 0x01 /* Empty Interrupt Enable */
130
131 /* SYM53C416 SCSI phases (lower 3 bits of SYM53C416_STATUS_REG) */
132 #define PHASE_DATA_OUT 0x00
133 #define PHASE_DATA_IN 0x01
134 #define PHASE_COMMAND 0x02
135 #define PHASE_STATUS 0x03
136 #define PHASE_RESERVED_1 0x04
137 #define PHASE_RESERVED_2 0x05
138 #define PHASE_MESSAGE_OUT 0x06
139 #define PHASE_MESSAGE_IN 0x07
140
141 /* SYM53C416 core commands */
142 #define NOOP 0x00
143 #define FLUSH_FIFO 0x01
144 #define RESET_CHIP 0x02
145 #define RESET_SCSI_BUS 0x03
146 #define DISABLE_SEL_RESEL 0x45
147 #define RESEL_SEQ 0x40
148 #define SEL_WITHOUT_ATN_SEQ 0x41
149 #define SEL_WITH_ATN_SEQ 0x42
150 #define SEL_WITH_ATN_AND_STOP_SEQ 0x43
151 #define ENABLE_SEL_RESEL 0x44
152 #define SEL_WITH_ATN3_SEQ 0x46
153 #define RESEL3_SEQ 0x47
154 #define SND_MSG 0x20
155 #define SND_STAT 0x21
156 #define SND_DATA 0x22
157 #define DISCONNECT_SEQ 0x23
158 #define TERMINATE_SEQ 0x24
159 #define TARGET_COMM_COMPLETE_SEQ 0x25
160 #define DISCONN 0x27
161 #define RECV_MSG_SEQ 0x28
162 #define RECV_CMD 0x29
163 #define RECV_DATA 0x2A
164 #define RECV_CMD_SEQ 0x2B
165 #define TARGET_ABORT_PIO 0x04
166 #define TRANSFER_INFORMATION 0x10
167 #define INIT_COMM_COMPLETE_SEQ 0x11
168 #define MSG_ACCEPTED 0x12
169 #define TRANSFER_PAD 0x18
170 #define SET_ATN 0x1A
171 #define RESET_ATN 0x1B
172 #define ILLEGAL 0xFF
173
174 #define PIO_MODE 0x80
175
176 #define IO_RANGE 0x20 /* 0x00 - 0x1F */
177 #define ID "sym53c416" /* Attention: copied to the sym53c416.h */
178 #define PIO_SIZE 128 /* Size of PIO fifo is 128 bytes */
179
180 #define READ_TIMEOUT 150
181 #define WRITE_TIMEOUT 150
182
183 #ifdef MODULE
184
185 #define sym53c416_base sym53c416
186 #define sym53c416_base_1 sym53c416_1
187 #define sym53c416_base_2 sym53c416_2
188 #define sym53c416_base_3 sym53c416_3
189
190 static unsigned int sym53c416_base[2] = {0,0};
191 static unsigned int sym53c416_base_1[2] = {0,0};
192 static unsigned int sym53c416_base_2[2] = {0,0};
193 static unsigned int sym53c416_base_3[2] = {0,0};
194
195 #endif
196
197 /* #define DEBUG */
198
199 /* Macro for debugging purposes */
200
201 #ifdef DEBUG
202 #define DEB(x) x
203 #else
204 #define DEB(x)
205 #endif
206
207 #define MAXHOSTS 4
208
209 enum phases
210 {
211 idle,
212 data_out,
213 data_in,
214 command_ph,
215 status_ph,
216 message_out,
217 message_in
218 };
219
220 typedef struct
221 {
222 int base;
223 int irq;
224 int scsi_id;
225 } host;
226
227 static host hosts[MAXHOSTS] = {
228 {0, 0, SYM53C416_SCSI_ID},
229 {0, 0, SYM53C416_SCSI_ID},
230 {0, 0, SYM53C416_SCSI_ID},
231 {0, 0, SYM53C416_SCSI_ID}
232 };
233
234 static int host_index = 0;
235 static char info[120];
236 static Scsi_Cmnd *current_command = NULL;
237 static int fastpio = 1;
238
239 static int probeaddrs[] = {0x200, 0x220, 0x240, 0};
240
241 static void sym53c416_set_transfer_counter(int base, unsigned int len)
242 {
243 /* Program Transfer Counter */
244 outb(len & 0x0000FF, base + TC_LOW);
245 outb((len & 0x00FF00) >> 8, base + TC_MID);
246 outb((len & 0xFF0000) >> 16, base + TC_HIGH);
247 }
248
249 /* Returns the number of bytes read */
250 static __inline__ unsigned int sym53c416_read(int base, unsigned char *buffer, unsigned int len)
251 {
252 unsigned int orig_len = len;
253 unsigned long flags = 0;
254 unsigned int bytes_left;
255 int i;
256 int timeout = READ_TIMEOUT;
257
258 /* Do transfer */
259 save_flags(flags);
260 cli();
261 while(len && timeout)
262 {
263 bytes_left = inb(base + PIO_FIFO_CNT); /* Number of bytes in the PIO FIFO */
264 if(fastpio && bytes_left > 3)
265 {
266 insl(base + PIO_FIFO_1, buffer, bytes_left >> 2);
267 buffer += bytes_left & 0xFC;
268 len -= bytes_left & 0xFC;
269 }
270 else if(bytes_left > 0)
271 {
272 len -= bytes_left;
273 for(; bytes_left > 0; bytes_left--)
274 *(buffer++) = inb(base + PIO_FIFO_1);
275 }
276 else
277 {
278 i = jiffies + timeout;
279 restore_flags(flags);
280 while(jiffies < i && (inb(base + PIO_INT_REG) & EMPTY) && timeout)
281 if(inb(base + PIO_INT_REG) & SCI)
282 timeout = 0;
283 save_flags(flags);
284 cli();
285 if(inb(base + PIO_INT_REG) & EMPTY)
286 timeout = 0;
287 }
288 }
289 restore_flags(flags);
290 return orig_len - len;
291 }
292
293 /* Returns the number of bytes written */
294 static __inline__ unsigned int sym53c416_write(int base, unsigned char *buffer, unsigned int len)
295 {
296 unsigned int orig_len = len;
297 unsigned long flags = 0;
298 unsigned int bufferfree;
299 unsigned int i;
300 unsigned int timeout = WRITE_TIMEOUT;
301
302 /* Do transfer */
303 save_flags(flags);
304 cli();
305 while(len && timeout)
306 {
307 bufferfree = PIO_SIZE - inb(base + PIO_FIFO_CNT);
308 if(bufferfree > len)
309 bufferfree = len;
310 if(fastpio && bufferfree > 3)
311 {
312 outsl(base + PIO_FIFO_1, buffer, bufferfree >> 2);
313 buffer += bufferfree & 0xFC;
314 len -= bufferfree & 0xFC;
315 }
316 else if(bufferfree > 0)
317 {
318 len -= bufferfree;
319 for(; bufferfree > 0; bufferfree--)
320 outb(*(buffer++), base + PIO_FIFO_1);
321 }
322 else
323 {
324 i = jiffies + timeout;
325 restore_flags(flags);
326 while(jiffies < i && (inb(base + PIO_INT_REG) & FULL) && timeout)
327 ;
328 save_flags(flags);
329 cli();
330 if(inb(base + PIO_INT_REG) & FULL)
331 timeout = 0;
332 }
333 }
334 restore_flags(flags);
335 return orig_len - len;
336 }
337
338 static void sym53c416_intr_handle(int irq, void *dev_id, struct pt_regs *regs)
339 {
340 int base = 0;
341 int i;
342 unsigned long flags = 0;
343 unsigned char status_reg, pio_int_reg, int_reg;
344 struct scatterlist *sglist;
345 unsigned int sgcount;
346 unsigned int tot_trans = 0;
347
348 /* We search the base address of the host adapter which caused the interrupt */
349 /* FIXME: should pass dev_id sensibly as hosts[i] */
350 for(i = 0; i < host_index && !base; i++)
351 if(irq == hosts[i].irq)
352 base = hosts[i].base;
353 /* If no adapter found, we cannot handle the interrupt. Leave a message */
354 /* and continue. This should never happen... */
355 if(!base)
356 {
357 printk(KERN_ERR "sym53c416: No host adapter defined for interrupt %d\n", irq);
358 return;
359 }
360 /* Now we have the base address and we can start handling the interrupt */
361
362 spin_lock_irqsave(&io_request_lock,flags);
363 status_reg = inb(base + STATUS_REG);
364 pio_int_reg = inb(base + PIO_INT_REG);
365 int_reg = inb(base + INT_REG);
366 spin_unlock_irqrestore(&io_request_lock, flags);
367
368 /* First, we handle error conditions */
369 if(int_reg & SCI) /* SCSI Reset */
370 {
371 printk(KERN_DEBUG "sym53c416: Reset received\n");
372 current_command->SCp.phase = idle;
373 current_command->result = DID_RESET << 16;
374 spin_lock_irqsave(&io_request_lock, flags);
375 current_command->scsi_done(current_command);
376 spin_unlock_irqrestore(&io_request_lock, flags);
377 return;
378 }
379 if(int_reg & ILCMD) /* Illegal Command */
380 {
381 printk(KERN_WARNING "sym53c416: Illegal Command: 0x%02x.\n", inb(base + COMMAND_REG));
382 current_command->SCp.phase = idle;
383 current_command->result = DID_ERROR << 16;
384 spin_lock_irqsave(&io_request_lock, flags);
385 current_command->scsi_done(current_command);
386 spin_unlock_irqrestore(&io_request_lock, flags);
387 return;
388 }
389 if(status_reg & GE) /* Gross Error */
390 {
391 printk(KERN_WARNING "sym53c416: Controller reports gross error.\n");
392 current_command->SCp.phase = idle;
393 current_command->result = DID_ERROR << 16;
394 spin_lock_irqsave(&io_request_lock, flags);
395 current_command->scsi_done(current_command);
396 spin_unlock_irqrestore(&io_request_lock, flags);
397 return;
398 }
399 if(status_reg & PE) /* Parity Error */
400 {
401 printk(KERN_WARNING "sym53c416:SCSI parity error.\n");
402 current_command->SCp.phase = idle;
403 current_command->result = DID_PARITY << 16;
404 spin_lock_irqsave(&io_request_lock, flags);
405 current_command->scsi_done(current_command);
406 spin_unlock_irqrestore(&io_request_lock, flags);
407 return;
408 }
409 if(pio_int_reg & (CE | OUE))
410 {
411 printk(KERN_WARNING "sym53c416: PIO interrupt error.\n");
412 current_command->SCp.phase = idle;
413 current_command->result = DID_ERROR << 16;
414 spin_lock_irqsave(&io_request_lock, flags);
415 current_command->scsi_done(current_command);
416 spin_unlock_irqrestore(&io_request_lock, flags);
417 return;
418 }
419 if(int_reg & DIS) /* Disconnect */
420 {
421 if(current_command->SCp.phase != message_in)
422 current_command->result = DID_NO_CONNECT << 16;
423 else
424 current_command->result = (current_command->SCp.Status & 0xFF) | ((current_command->SCp.Message & 0xFF) << 8) | (DID_OK << 16);
425 current_command->SCp.phase = idle;
426 spin_lock_irqsave(&io_request_lock, flags);
427 current_command->scsi_done(current_command);
428 spin_unlock_irqrestore(&io_request_lock, flags);
429 return;
430 }
431 /* Now we handle SCSI phases */
432
433 switch(status_reg & PHBITS) /* Filter SCSI phase out of status reg */
434 {
435 case PHASE_DATA_OUT:
436 {
437 if(int_reg & BS)
438 {
439 current_command->SCp.phase = data_out;
440 outb(FLUSH_FIFO, base + COMMAND_REG);
441 sym53c416_set_transfer_counter(base, current_command->request_bufflen);
442 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
443 if(!current_command->use_sg)
444 tot_trans = sym53c416_write(base, current_command->request_buffer, current_command->request_bufflen);
445 else
446 {
447 sgcount = current_command->use_sg;
448 sglist = current_command->request_buffer;
449 while(sgcount--)
450 {
451 tot_trans += sym53c416_write(base, sglist->address, sglist->length);
452 sglist++;
453 }
454 }
455 if(tot_trans < current_command->underflow)
456 printk(KERN_WARNING "sym53c416: Underflow, wrote %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
457 }
458 break;
459 }
460
461 case PHASE_DATA_IN:
462 {
463 if(int_reg & BS)
464 {
465 current_command->SCp.phase = data_in;
466 outb(FLUSH_FIFO, base + COMMAND_REG);
467 sym53c416_set_transfer_counter(base, current_command->request_bufflen);
468 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
469 if(!current_command->use_sg)
470 tot_trans = sym53c416_read(base, current_command->request_buffer, current_command->request_bufflen);
471 else
472 {
473 sgcount = current_command->use_sg;
474 sglist = current_command->request_buffer;
475 while(sgcount--)
476 {
477 tot_trans += sym53c416_read(base, sglist->address, sglist->length);
478 sglist++;
479 }
480 }
481 if(tot_trans < current_command->underflow)
482 printk(KERN_WARNING "sym53c416: Underflow, read %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
483 }
484 break;
485 }
486
487 case PHASE_COMMAND:
488 {
489 current_command->SCp.phase = command_ph;
490 printk(KERN_ERR "sym53c416: Unknown interrupt in command phase.\n");
491 break;
492 }
493
494 case PHASE_STATUS:
495 {
496 current_command->SCp.phase = status_ph;
497 outb(FLUSH_FIFO, base + COMMAND_REG);
498 outb(INIT_COMM_COMPLETE_SEQ, base + COMMAND_REG);
499 break;
500 }
501
502 case PHASE_RESERVED_1:
503 case PHASE_RESERVED_2:
504 {
505 printk(KERN_ERR "sym53c416: Reserved phase occurred.\n");
506 break;
507 }
508
509 case PHASE_MESSAGE_OUT:
510 {
511 current_command->SCp.phase = message_out;
512 outb(SET_ATN, base + COMMAND_REG);
513 outb(MSG_ACCEPTED, base + COMMAND_REG);
514 break;
515 }
516
517 case PHASE_MESSAGE_IN:
518 {
519 current_command->SCp.phase = message_in;
520 current_command->SCp.Status = inb(base + SCSI_FIFO);
521 current_command->SCp.Message = inb(base + SCSI_FIFO);
522 if(current_command->SCp.Message == SAVE_POINTERS || current_command->SCp.Message == DISCONNECT)
523 outb(SET_ATN, base + COMMAND_REG);
524 outb(MSG_ACCEPTED, base + COMMAND_REG);
525 break;
526 }
527 }
528 }
529
530 static void sym53c416_init(int base, int scsi_id)
531 {
532 outb(RESET_CHIP, base + COMMAND_REG);
533 outb(NOOP, base + COMMAND_REG);
534 outb(0x99, base + TOM); /* Time out of 250 ms */
535 outb(0x05, base + STP);
536 outb(0x00, base + SYNC_OFFSET);
537 outb(EPC | scsi_id, base + CONF_REG_1);
538 outb(FE | SCSI2 | TBPA, base + CONF_REG_2);
539 outb(IDMRC | QTE | CDB10 | FSCSI | FCLK, base + CONF_REG_3);
540 outb(0x83 | EAN, base + CONF_REG_4);
541 outb(IE | WSE0, base + CONF_REG_5);
542 outb(0, base + FEATURE_EN);
543 }
544
545 static int sym53c416_probeirq(int base, int scsi_id)
546 {
547 int irq, irqs, i;
548
549 /* Clear interrupt register */
550 inb(base + INT_REG);
551 /* Start probing for irq's */
552 irqs = probe_irq_on();
553 /* Reinit chip */
554 sym53c416_init(base, scsi_id);
555 /* Cause interrupt */
556 outb(NOOP, base + COMMAND_REG);
557 outb(ILLEGAL, base + COMMAND_REG);
558 outb(0x07, base + DEST_BUS_ID);
559 outb(0x00, base + DEST_BUS_ID);
560 /* Wait for interrupt to occur */
561 i = jiffies + 20;
562 while(i > jiffies && !(inb(base + STATUS_REG) & SCI))
563 barrier();
564 if(i <= jiffies) /* timed out */
565 return 0;
566 /* Get occurred irq */
567 irq = probe_irq_off(irqs);
568 sym53c416_init(base, scsi_id);
569 return irq;
570 }
571
572 /* Setup: sym53c416=base,irq */
573 void sym53c416_setup(char *str, int *ints)
574 {
575 int i;
576
577 if(host_index >= MAXHOSTS)
578 {
579 printk(KERN_WARNING "sym53c416: Too many hosts defined\n");
580 return;
581 }
582 if(ints[0] < 1 || ints[0] > 2)
583 {
584 printk(KERN_ERR "sym53c416: Wrong number of parameters:\n");
585 printk(KERN_ERR "sym53c416: usage: sym53c416=<base>[,<irq>]\n");
586 return;
587 }
588 for(i = 0; i < host_index && i >= 0; i++)
589 if(hosts[i].base == ints[1])
590 i = -2;
591 if(i >= 0)
592 {
593 hosts[host_index].base = ints[1];
594 hosts[host_index].irq = (ints[0] == 2)? ints[2] : 0;
595 host_index++;
596 }
597 }
598
599 static int sym53c416_test(int base)
600 {
601 outb(RESET_CHIP, base + COMMAND_REG);
602 outb(NOOP, base + COMMAND_REG);
603 if(inb(base + COMMAND_REG) != NOOP)
604 return 0;
605 if(!inb(base + TC_HIGH) || inb(base + TC_HIGH) == 0xFF)
606 return 0;
607 if((inb(base + PIO_INT_REG) & (FULL | EMPTY | CE | OUE | FIE | EIE)) != EMPTY)
608 return 0;
609 return 1;
610 }
611
612
613 static struct isapnp_device_id id_table[] = {
614 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
615 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4163), 0 },
616 {0}
617 };
618
619 MODULE_DEVICE_TABLE(isapnp, id_table);
620
621 void sym53c416_probe(void)
622 {
623 int *base = probeaddrs;
624 int ints[2];
625
626 ints[0] = 1;
627 for(; *base; base++)
628 {
629 if(!check_region(*base, IO_RANGE) && sym53c416_test(*base))
630 {
631 ints[1] = *base;
632 sym53c416_setup(NULL, ints);
633 }
634 }
635 }
636
637 int sym53c416_detect(Scsi_Host_Template *tpnt)
638 {
639 unsigned long flags;
640 struct Scsi_Host * shpnt = NULL;
641 int i;
642 int count;
643 struct pci_dev *idev = NULL;
644
645 #ifdef MODULE
646 int ints[3];
647
648 ints[0] = 2;
649 if(sym53c416_base)
650 {
651 ints[1] = sym53c416_base[0];
652 ints[2] = sym53c416_base[1];
653 sym53c416_setup(NULL, ints);
654 }
655 if(sym53c416_base_1)
656 {
657 ints[1] = sym53c416_base_1[0];
658 ints[2] = sym53c416_base_1[1];
659 sym53c416_setup(NULL, ints);
660 }
661 if(sym53c416_base_2)
662 {
663 ints[1] = sym53c416_base_2[0];
664 ints[2] = sym53c416_base_2[1];
665 sym53c416_setup(NULL, ints);
666 }
667 if(sym53c416_base_3)
668 {
669 ints[1] = sym53c416_base_3[0];
670 ints[2] = sym53c416_base_3[1];
671 sym53c416_setup(NULL, ints);
672 }
673 #endif
674 printk(KERN_INFO "sym53c416.c: %s\n", VERSION_STRING);
675
676 while((idev=isapnp_find_dev(NULL, ISAPNP_VENDOR('S','L','I'),
677 ISAPNP_FUNCTION(0x4163), idev))!=NULL)
678 {
679 int i[3];
680
681 if(idev->prepare(idev)<0)
682 {
683 printk(KERN_WARNING "sym53c416: unable to prepare PnP card.\n");
684 continue;
685 }
686 if(idev->activate(idev)<0)
687 {
688 printk(KERN_WARNING "sym53c416: unable to activate PnP card.\n");
689 continue;
690 }
691
692 i[0] = 2;
693 i[1] = idev->resource[0].start;
694 i[2] = idev->irq_resource[0].start;
695
696 printk(KERN_INFO "sym53c416: ISAPnP card found and configured at 0x%X, IRQ %d.\n",
697 i[1], i[2]);
698 sym53c416_setup(NULL, i);
699 }
700 sym53c416_probe();
701
702 /* Now we register and set up each host adapter found... */
703 for(count = 0, i = 0; i < host_index; i++)
704 {
705 if(!sym53c416_test(hosts[i].base))
706 printk(KERN_WARNING "No sym53c416 found at address 0x%03x\n", hosts[i].base);
707 else
708 {
709 if(hosts[i].irq == 0)
710 /* We don't have an irq yet, so we should probe for one */
711 if((hosts[i].irq = sym53c416_probeirq(hosts[i].base, hosts[i].scsi_id)) == 0)
712 printk(KERN_WARNING "IRQ autoprobing failed for sym53c416 at address 0x%03x\n", hosts[i].base);
713 if(hosts[i].irq && !check_region(hosts[i].base, IO_RANGE))
714 {
715 shpnt = scsi_register(tpnt, 0);
716 if(shpnt==NULL)
717 continue;
718 save_flags(flags);
719 cli();
720 /* FIXME: Request_irq with CLI is not safe */
721 /* Request for specified IRQ */
722 if(request_irq(hosts[i].irq, sym53c416_intr_handle, 0, ID, NULL))
723 {
724 restore_flags(flags);
725 printk(KERN_ERR "sym53c416: Unable to assign IRQ %d\n", hosts[i].irq);
726 scsi_unregister(shpnt);
727 }
728 else
729 {
730 /* Inform the kernel of our IO range */
731 request_region(hosts[i].base, IO_RANGE, ID);
732 shpnt->unique_id = hosts[i].base;
733 shpnt->io_port = hosts[i].base;
734 shpnt->n_io_port = IO_RANGE;
735 shpnt->irq = hosts[i].irq;
736 shpnt->this_id = hosts[i].scsi_id;
737 sym53c416_init(hosts[i].base, hosts[i].scsi_id);
738 count++;
739 restore_flags(flags);
740 }
741 }
742 }
743 }
744 return count;
745 }
746
747 const char *sym53c416_info(struct Scsi_Host *SChost)
748 {
749 int i;
750 int base = SChost->io_port;
751 int irq = SChost->irq;
752 int scsi_id = 0;
753 int rev = inb(base + TC_HIGH);
754
755 for(i = 0; i < host_index; i++)
756 if(hosts[i].base == base)
757 scsi_id = hosts[i].scsi_id;
758 sprintf(info, "Symbios Logic 53c416 (rev. %d) at 0x%03x, irq %d, SCSI-ID %d, %s pio", rev, base, irq, scsi_id, (fastpio)? "fast" : "slow");
759 return info;
760 }
761
762 int sym53c416_queuecommand(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
763 {
764 int base;
765 unsigned long flags = 0;
766 int i;
767
768 /* Store base register as we can have more than one controller in the system */
769 base = SCpnt->host->io_port;
770 current_command = SCpnt; /* set current command */
771 current_command->scsi_done = done; /* set ptr to done function */
772 current_command->SCp.phase = command_ph; /* currect phase is the command phase */
773 current_command->SCp.Status = 0;
774 current_command->SCp.Message = 0;
775
776 save_flags(flags);
777 cli();
778 outb(SCpnt->target, base + DEST_BUS_ID); /* Set scsi id target */
779 outb(FLUSH_FIFO, base + COMMAND_REG); /* Flush SCSI and PIO FIFO's */
780 /* Write SCSI command into the SCSI fifo */
781 for(i = 0; i < SCpnt->cmd_len; i++)
782 outb(SCpnt->cmnd[i], base + SCSI_FIFO);
783 /* Start selection sequence */
784 outb(SEL_WITHOUT_ATN_SEQ, base + COMMAND_REG);
785 /* Now an interrupt will be generated which we will catch in out interrupt routine */
786 restore_flags(flags);
787 return 0;
788 }
789
790 static void internal_done(Scsi_Cmnd *SCpnt)
791 {
792 SCpnt->SCp.Status++;
793 }
794
795 static int sym53c416_command(Scsi_Cmnd *SCpnt)
796 {
797 sym53c416_queuecommand(SCpnt, internal_done);
798 SCpnt->SCp.Status = 0;
799 while(!SCpnt->SCp.Status)
800 barrier();
801 return SCpnt->result;
802 }
803
804 static int sym53c416_abort(Scsi_Cmnd *SCpnt)
805 {
806 //printk("sym53c416_abort\n");
807 /* We don't know how to abort for the moment */
808 return SCSI_ABORT_SNOOZE;
809 }
810
811 static int sym53c416_reset(Scsi_Cmnd *SCpnt, unsigned int reset_flags)
812 {
813 int base;
814 int scsi_id = -1;
815 int i;
816
817 //printk("sym53c416_reset\n");
818 base = SCpnt->host->io_port;
819 /* search scsi_id */
820 for(i = 0; i < host_index && scsi_id != -1; i++)
821 if(hosts[i].base == base)
822 scsi_id = hosts[i].scsi_id;
823 outb(RESET_CHIP, base + COMMAND_REG);
824 outb(NOOP | PIO_MODE, base + COMMAND_REG);
825 outb(RESET_SCSI_BUS, base + COMMAND_REG);
826 sym53c416_init(base, scsi_id);
827 return SCSI_RESET_PENDING;
828 }
829
830 static int sym53c416_bios_param(Disk *disk, kdev_t dev, int *ip)
831 {
832 int size;
833
834 size = disk->capacity;
835 ip[0] = 64; /* heads */
836 ip[1] = 32; /* sectors */
837 if((ip[2] = size >> 11) > 1024) /* cylinders, test for big disk */
838 {
839 ip[0] = 255; /* heads */
840 ip[1] = 63; /* sectors */
841 ip[2] = size / (255 * 63); /* cylinders */
842 }
843 return 0;
844 }
845
846 /* Loadable module support */
847 #ifdef MODULE
848
849 MODULE_AUTHOR("Lieven Willems");
850 MODULE_PARM(sym53c416, "1-2i");
851 MODULE_PARM(sym53c416_1, "1-2i");
852 MODULE_PARM(sym53c416_2, "1-2i");
853 MODULE_PARM(sym53c416_3, "1-2i");
854
855 #endif
856
857 static Scsi_Host_Template driver_template = SYM53C416;
858
859 #include "scsi_module.c"
860