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[TCP]: Fix bug #5070: kernel BUG at net/ipv4/tcp_output.c:864
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / sym53c416.c
blobef19adc67efff419565306323aa017500438bca4
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 * Bjoern A. Zeeb <bzeeb@zabbadoz.net> : Initial irq locking updates
13 * Added another card with ISAPnP support
14 *
15 * LILO command line usage: sym53c416=<PORTBASE>[,<IRQ>]
16 *
17 * This program is free software; you can redistribute it and/or modify it
18 * under the terms of the GNU General Public License as published by the
19 * Free Software Foundation; either version 2, or (at your option) any
20 * later version.
21 *
22 * This program is distributed in the hope that it will be useful, but
23 * WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
25 * General Public License for more details.
26 *
27 */
28
29 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/types.h>
32 #include <linux/init.h>
33 #include <linux/string.h>
34 #include <linux/ioport.h>
35 #include <linux/sched.h>
36 #include <linux/interrupt.h>
37 #include <linux/delay.h>
38 #include <linux/proc_fs.h>
39 #include <linux/spinlock.h>
40 #include <asm/dma.h>
41 #include <asm/system.h>
42 #include <asm/io.h>
43 #include <linux/blkdev.h>
44 #include <linux/isapnp.h>
45 #include "scsi.h"
46 #include <scsi/scsi_host.h>
47 #include "sym53c416.h"
48
49 #define VERSION_STRING "Version 1.0.0-ac"
50
51 #define TC_LOW 0x00 /* Transfer counter low */
52 #define TC_MID 0x01 /* Transfer counter mid */
53 #define SCSI_FIFO 0x02 /* SCSI FIFO register */
54 #define COMMAND_REG 0x03 /* Command Register */
55 #define STATUS_REG 0x04 /* Status Register (READ) */
56 #define DEST_BUS_ID 0x04 /* Destination Bus ID (WRITE) */
57 #define INT_REG 0x05 /* Interrupt Register (READ) */
58 #define TOM 0x05 /* Time out multiplier (WRITE) */
59 #define STP 0x06 /* Synchronous Transfer period */
60 #define SYNC_OFFSET 0x07 /* Synchronous Offset */
61 #define CONF_REG_1 0x08 /* Configuration register 1 */
62 #define CONF_REG_2 0x0B /* Configuration register 2 */
63 #define CONF_REG_3 0x0C /* Configuration register 3 */
64 #define CONF_REG_4 0x0D /* Configuration register 4 */
65 #define TC_HIGH 0x0E /* Transfer counter high */
66 #define PIO_FIFO_1 0x10 /* PIO FIFO register 1 */
67 #define PIO_FIFO_2 0x11 /* PIO FIFO register 2 */
68 #define PIO_FIFO_3 0x12 /* PIO FIFO register 3 */
69 #define PIO_FIFO_4 0x13 /* PIO FIFO register 4 */
70 #define PIO_FIFO_CNT 0x14 /* PIO FIFO count */
71 #define PIO_INT_REG 0x15 /* PIO interrupt register */
72 #define CONF_REG_5 0x16 /* Configuration register 5 */
73 #define FEATURE_EN 0x1D /* Feature Enable register */
74
75 /* Configuration register 1 entries: */
76 /* Bits 2-0: SCSI ID of host adapter */
77 #define SCM 0x80 /* Slow Cable Mode */
78 #define SRID 0x40 /* SCSI Reset Interrupt Disable */
79 #define PTM 0x20 /* Parity Test Mode */
80 #define EPC 0x10 /* Enable Parity Checking */
81 #define CTME 0x08 /* Special Test Mode */
82
83 /* Configuration register 2 entries: */
84 #define FE 0x40 /* Features Enable */
85 #define SCSI2 0x08 /* SCSI 2 Enable */
86 #define TBPA 0x04 /* Target Bad Parity Abort */
87
88 /* Configuration register 3 entries: */
89 #define IDMRC 0x80 /* ID Message Reserved Check */
90 #define QTE 0x40 /* Queue Tag Enable */
91 #define CDB10 0x20 /* Command Descriptor Block 10 */
92 #define FSCSI 0x10 /* FastSCSI */
93 #define FCLK 0x08 /* FastClock */
94
95 /* Configuration register 4 entries: */
96 #define RBS 0x08 /* Register bank select */
97 #define EAN 0x04 /* Enable Active Negotiation */
98
99 /* Configuration register 5 entries: */
100 #define LPSR 0x80 /* Lower Power SCSI Reset */
101 #define IE 0x20 /* Interrupt Enable */
102 #define LPM 0x02 /* Low Power Mode */
103 #define WSE0 0x01 /* 0WS Enable */
104
105 /* Interrupt register entries: */
106 #define SRST 0x80 /* SCSI Reset */
107 #define ILCMD 0x40 /* Illegal Command */
108 #define DIS 0x20 /* Disconnect */
109 #define BS 0x10 /* Bus Service */
110 #define FC 0x08 /* Function Complete */
111 #define RESEL 0x04 /* Reselected */
112 #define SI 0x03 /* Selection Interrupt */
113
114 /* Status Register Entries: */
115 #define SCI 0x80 /* SCSI Core Int */
116 #define GE 0x40 /* Gross Error */
117 #define PE 0x20 /* Parity Error */
118 #define TC 0x10 /* Terminal Count */
119 #define VGC 0x08 /* Valid Group Code */
120 #define PHBITS 0x07 /* Phase bits */
121
122 /* PIO Interrupt Register Entries: */
123 #define SCI 0x80 /* SCSI Core Int */
124 #define PFI 0x40 /* PIO FIFO Interrupt */
125 #define FULL 0x20 /* PIO FIFO Full */
126 #define EMPTY 0x10 /* PIO FIFO Empty */
127 #define CE 0x08 /* Collision Error */
128 #define OUE 0x04 /* Overflow / Underflow error */
129 #define FIE 0x02 /* Full Interrupt Enable */
130 #define EIE 0x01 /* Empty Interrupt Enable */
131
132 /* SYM53C416 SCSI phases (lower 3 bits of SYM53C416_STATUS_REG) */
133 #define PHASE_DATA_OUT 0x00
134 #define PHASE_DATA_IN 0x01
135 #define PHASE_COMMAND 0x02
136 #define PHASE_STATUS 0x03
137 #define PHASE_RESERVED_1 0x04
138 #define PHASE_RESERVED_2 0x05
139 #define PHASE_MESSAGE_OUT 0x06
140 #define PHASE_MESSAGE_IN 0x07
141
142 /* SYM53C416 core commands */
143 #define NOOP 0x00
144 #define FLUSH_FIFO 0x01
145 #define RESET_CHIP 0x02
146 #define RESET_SCSI_BUS 0x03
147 #define DISABLE_SEL_RESEL 0x45
148 #define RESEL_SEQ 0x40
149 #define SEL_WITHOUT_ATN_SEQ 0x41
150 #define SEL_WITH_ATN_SEQ 0x42
151 #define SEL_WITH_ATN_AND_STOP_SEQ 0x43
152 #define ENABLE_SEL_RESEL 0x44
153 #define SEL_WITH_ATN3_SEQ 0x46
154 #define RESEL3_SEQ 0x47
155 #define SND_MSG 0x20
156 #define SND_STAT 0x21
157 #define SND_DATA 0x22
158 #define DISCONNECT_SEQ 0x23
159 #define TERMINATE_SEQ 0x24
160 #define TARGET_COMM_COMPLETE_SEQ 0x25
161 #define DISCONN 0x27
162 #define RECV_MSG_SEQ 0x28
163 #define RECV_CMD 0x29
164 #define RECV_DATA 0x2A
165 #define RECV_CMD_SEQ 0x2B
166 #define TARGET_ABORT_PIO 0x04
167 #define TRANSFER_INFORMATION 0x10
168 #define INIT_COMM_COMPLETE_SEQ 0x11
169 #define MSG_ACCEPTED 0x12
170 #define TRANSFER_PAD 0x18
171 #define SET_ATN 0x1A
172 #define RESET_ATN 0x1B
173 #define ILLEGAL 0xFF
174
175 #define PIO_MODE 0x80
176
177 #define IO_RANGE 0x20 /* 0x00 - 0x1F */
178 #define ID "sym53c416" /* Attention: copied to the sym53c416.h */
179 #define PIO_SIZE 128 /* Size of PIO fifo is 128 bytes */
180
181 #define READ_TIMEOUT 150
182 #define WRITE_TIMEOUT 150
183
184 #ifdef MODULE
185
186 #define sym53c416_base sym53c416
187 #define sym53c416_base_1 sym53c416_1
188 #define sym53c416_base_2 sym53c416_2
189 #define sym53c416_base_3 sym53c416_3
190
191 static unsigned int sym53c416_base[2] = {0,0};
192 static unsigned int sym53c416_base_1[2] = {0,0};
193 static unsigned int sym53c416_base_2[2] = {0,0};
194 static unsigned int sym53c416_base_3[2] = {0,0};
195
196 #endif
197
198 #define MAXHOSTS 4
199
200 #define SG_ADDRESS(buffer) ((char *) (page_address((buffer)->page)+(buffer)->offset))
201
202 enum phases
203 {
204 idle,
205 data_out,
206 data_in,
207 command_ph,
208 status_ph,
209 message_out,
210 message_in
211 };
212
213 typedef struct
214 {
215 int base;
216 int irq;
217 int scsi_id;
218 } host;
219
220 static host hosts[MAXHOSTS] = {
221 {0, 0, SYM53C416_SCSI_ID},
222 {0, 0, SYM53C416_SCSI_ID},
223 {0, 0, SYM53C416_SCSI_ID},
224 {0, 0, SYM53C416_SCSI_ID}
225 };
226
227 static int host_index = 0;
228 static char info[120];
229 static Scsi_Cmnd *current_command = NULL;
230 static int fastpio = 1;
231
232 static int probeaddrs[] = {0x200, 0x220, 0x240, 0};
233
234 static void sym53c416_set_transfer_counter(int base, unsigned int len)
235 {
236 /* Program Transfer Counter */
237 outb(len & 0x0000FF, base + TC_LOW);
238 outb((len & 0x00FF00) >> 8, base + TC_MID);
239 outb((len & 0xFF0000) >> 16, base + TC_HIGH);
240 }
241
242 static DEFINE_SPINLOCK(sym53c416_lock);
243
244 /* Returns the number of bytes read */
245 static __inline__ unsigned int sym53c416_read(int base, unsigned char *buffer, unsigned int len)
246 {
247 unsigned int orig_len = len;
248 unsigned long flags = 0;
249 unsigned int bytes_left;
250 unsigned long i;
251 int timeout = READ_TIMEOUT;
252
253 /* Do transfer */
254 spin_lock_irqsave(&sym53c416_lock, flags);
255 while(len && timeout)
256 {
257 bytes_left = inb(base + PIO_FIFO_CNT); /* Number of bytes in the PIO FIFO */
258 if(fastpio && bytes_left > 3)
259 {
260 insl(base + PIO_FIFO_1, buffer, bytes_left >> 2);
261 buffer += bytes_left & 0xFC;
262 len -= bytes_left & 0xFC;
263 }
264 else if(bytes_left > 0)
265 {
266 len -= bytes_left;
267 for(; bytes_left > 0; bytes_left--)
268 *(buffer++) = inb(base + PIO_FIFO_1);
269 }
270 else
271 {
272 i = jiffies + timeout;
273 spin_unlock_irqrestore(&sym53c416_lock, flags);
274 while(time_before(jiffies, i) && (inb(base + PIO_INT_REG) & EMPTY) && timeout)
275 if(inb(base + PIO_INT_REG) & SCI)
276 timeout = 0;
277 spin_lock_irqsave(&sym53c416_lock, flags);
278 if(inb(base + PIO_INT_REG) & EMPTY)
279 timeout = 0;
280 }
281 }
282 spin_unlock_irqrestore(&sym53c416_lock, flags);
283 return orig_len - len;
284 }
285
286 /* Returns the number of bytes written */
287 static __inline__ unsigned int sym53c416_write(int base, unsigned char *buffer, unsigned int len)
288 {
289 unsigned int orig_len = len;
290 unsigned long flags = 0;
291 unsigned int bufferfree;
292 unsigned long i;
293 unsigned int timeout = WRITE_TIMEOUT;
294
295 /* Do transfer */
296 spin_lock_irqsave(&sym53c416_lock, flags);
297 while(len && timeout)
298 {
299 bufferfree = PIO_SIZE - inb(base + PIO_FIFO_CNT);
300 if(bufferfree > len)
301 bufferfree = len;
302 if(fastpio && bufferfree > 3)
303 {
304 outsl(base + PIO_FIFO_1, buffer, bufferfree >> 2);
305 buffer += bufferfree & 0xFC;
306 len -= bufferfree & 0xFC;
307 }
308 else if(bufferfree > 0)
309 {
310 len -= bufferfree;
311 for(; bufferfree > 0; bufferfree--)
312 outb(*(buffer++), base + PIO_FIFO_1);
313 }
314 else
315 {
316 i = jiffies + timeout;
317 spin_unlock_irqrestore(&sym53c416_lock, flags);
318 while(time_before(jiffies, i) && (inb(base + PIO_INT_REG) & FULL) && timeout)
319 ;
320 spin_lock_irqsave(&sym53c416_lock, flags);
321 if(inb(base + PIO_INT_REG) & FULL)
322 timeout = 0;
323 }
324 }
325 spin_unlock_irqrestore(&sym53c416_lock, flags);
326 return orig_len - len;
327 }
328
329 static irqreturn_t sym53c416_intr_handle(int irq, void *dev_id,
330 struct pt_regs *regs)
331 {
332 struct Scsi_Host *dev = dev_id;
333 int base = 0;
334 int i;
335 unsigned long flags = 0;
336 unsigned char status_reg, pio_int_reg, int_reg;
337 struct scatterlist *sglist;
338 unsigned int sgcount;
339 unsigned int tot_trans = 0;
340
341 /* We search the base address of the host adapter which caused the interrupt */
342 /* FIXME: should pass dev_id sensibly as hosts[i] */
343 for(i = 0; i < host_index && !base; i++)
344 if(irq == hosts[i].irq)
345 base = hosts[i].base;
346 /* If no adapter found, we cannot handle the interrupt. Leave a message */
347 /* and continue. This should never happen... */
348 if(!base)
349 {
350 printk(KERN_ERR "sym53c416: No host adapter defined for interrupt %d\n", irq);
351 return IRQ_NONE;
352 }
353 /* Now we have the base address and we can start handling the interrupt */
354
355 spin_lock_irqsave(dev->host_lock,flags);
356 status_reg = inb(base + STATUS_REG);
357 pio_int_reg = inb(base + PIO_INT_REG);
358 int_reg = inb(base + INT_REG);
359 spin_unlock_irqrestore(dev->host_lock, flags);
360
361 /* First, we handle error conditions */
362 if(int_reg & SCI) /* SCSI Reset */
363 {
364 printk(KERN_DEBUG "sym53c416: Reset received\n");
365 current_command->SCp.phase = idle;
366 current_command->result = DID_RESET << 16;
367 spin_lock_irqsave(dev->host_lock, flags);
368 current_command->scsi_done(current_command);
369 spin_unlock_irqrestore(dev->host_lock, flags);
370 goto out;
371 }
372 if(int_reg & ILCMD) /* Illegal Command */
373 {
374 printk(KERN_WARNING "sym53c416: Illegal Command: 0x%02x.\n", inb(base + COMMAND_REG));
375 current_command->SCp.phase = idle;
376 current_command->result = DID_ERROR << 16;
377 spin_lock_irqsave(dev->host_lock, flags);
378 current_command->scsi_done(current_command);
379 spin_unlock_irqrestore(dev->host_lock, flags);
380 goto out;
381 }
382 if(status_reg & GE) /* Gross Error */
383 {
384 printk(KERN_WARNING "sym53c416: Controller reports gross error.\n");
385 current_command->SCp.phase = idle;
386 current_command->result = DID_ERROR << 16;
387 spin_lock_irqsave(dev->host_lock, flags);
388 current_command->scsi_done(current_command);
389 spin_unlock_irqrestore(dev->host_lock, flags);
390 goto out;
391 }
392 if(status_reg & PE) /* Parity Error */
393 {
394 printk(KERN_WARNING "sym53c416:SCSI parity error.\n");
395 current_command->SCp.phase = idle;
396 current_command->result = DID_PARITY << 16;
397 spin_lock_irqsave(dev->host_lock, flags);
398 current_command->scsi_done(current_command);
399 spin_unlock_irqrestore(dev->host_lock, flags);
400 goto out;
401 }
402 if(pio_int_reg & (CE | OUE))
403 {
404 printk(KERN_WARNING "sym53c416: PIO interrupt error.\n");
405 current_command->SCp.phase = idle;
406 current_command->result = DID_ERROR << 16;
407 spin_lock_irqsave(dev->host_lock, flags);
408 current_command->scsi_done(current_command);
409 spin_unlock_irqrestore(dev->host_lock, flags);
410 goto out;
411 }
412 if(int_reg & DIS) /* Disconnect */
413 {
414 if(current_command->SCp.phase != message_in)
415 current_command->result = DID_NO_CONNECT << 16;
416 else
417 current_command->result = (current_command->SCp.Status & 0xFF) | ((current_command->SCp.Message & 0xFF) << 8) | (DID_OK << 16);
418 current_command->SCp.phase = idle;
419 spin_lock_irqsave(dev->host_lock, flags);
420 current_command->scsi_done(current_command);
421 spin_unlock_irqrestore(dev->host_lock, flags);
422 goto out;
423 }
424 /* Now we handle SCSI phases */
425
426 switch(status_reg & PHBITS) /* Filter SCSI phase out of status reg */
427 {
428 case PHASE_DATA_OUT:
429 {
430 if(int_reg & BS)
431 {
432 current_command->SCp.phase = data_out;
433 outb(FLUSH_FIFO, base + COMMAND_REG);
434 sym53c416_set_transfer_counter(base, current_command->request_bufflen);
435 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
436 if(!current_command->use_sg)
437 tot_trans = sym53c416_write(base, current_command->request_buffer, current_command->request_bufflen);
438 else
439 {
440 sgcount = current_command->use_sg;
441 sglist = current_command->request_buffer;
442 while(sgcount--)
443 {
444 tot_trans += sym53c416_write(base, SG_ADDRESS(sglist), sglist->length);
445 sglist++;
446 }
447 }
448 if(tot_trans < current_command->underflow)
449 printk(KERN_WARNING "sym53c416: Underflow, wrote %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
450 }
451 break;
452 }
453
454 case PHASE_DATA_IN:
455 {
456 if(int_reg & BS)
457 {
458 current_command->SCp.phase = data_in;
459 outb(FLUSH_FIFO, base + COMMAND_REG);
460 sym53c416_set_transfer_counter(base, current_command->request_bufflen);
461 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
462 if(!current_command->use_sg)
463 tot_trans = sym53c416_read(base, current_command->request_buffer, current_command->request_bufflen);
464 else
465 {
466 sgcount = current_command->use_sg;
467 sglist = current_command->request_buffer;
468 while(sgcount--)
469 {
470 tot_trans += sym53c416_read(base, SG_ADDRESS(sglist), sglist->length);
471 sglist++;
472 }
473 }
474 if(tot_trans < current_command->underflow)
475 printk(KERN_WARNING "sym53c416: Underflow, read %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
476 }
477 break;
478 }
479
480 case PHASE_COMMAND:
481 {
482 current_command->SCp.phase = command_ph;
483 printk(KERN_ERR "sym53c416: Unknown interrupt in command phase.\n");
484 break;
485 }
486
487 case PHASE_STATUS:
488 {
489 current_command->SCp.phase = status_ph;
490 outb(FLUSH_FIFO, base + COMMAND_REG);
491 outb(INIT_COMM_COMPLETE_SEQ, base + COMMAND_REG);
492 break;
493 }
494
495 case PHASE_RESERVED_1:
496 case PHASE_RESERVED_2:
497 {
498 printk(KERN_ERR "sym53c416: Reserved phase occurred.\n");
499 break;
500 }
501
502 case PHASE_MESSAGE_OUT:
503 {
504 current_command->SCp.phase = message_out;
505 outb(SET_ATN, base + COMMAND_REG);
506 outb(MSG_ACCEPTED, base + COMMAND_REG);
507 break;
508 }
509
510 case PHASE_MESSAGE_IN:
511 {
512 current_command->SCp.phase = message_in;
513 current_command->SCp.Status = inb(base + SCSI_FIFO);
514 current_command->SCp.Message = inb(base + SCSI_FIFO);
515 if(current_command->SCp.Message == SAVE_POINTERS || current_command->SCp.Message == DISCONNECT)
516 outb(SET_ATN, base + COMMAND_REG);
517 outb(MSG_ACCEPTED, base + COMMAND_REG);
518 break;
519 }
520 }
521 out:
522 return IRQ_HANDLED;
523 }
524
525 static void sym53c416_init(int base, int scsi_id)
526 {
527 outb(RESET_CHIP, base + COMMAND_REG);
528 outb(NOOP, base + COMMAND_REG);
529 outb(0x99, base + TOM); /* Time out of 250 ms */
530 outb(0x05, base + STP);
531 outb(0x00, base + SYNC_OFFSET);
532 outb(EPC | scsi_id, base + CONF_REG_1);
533 outb(FE | SCSI2 | TBPA, base + CONF_REG_2);
534 outb(IDMRC | QTE | CDB10 | FSCSI | FCLK, base + CONF_REG_3);
535 outb(0x83 | EAN, base + CONF_REG_4);
536 outb(IE | WSE0, base + CONF_REG_5);
537 outb(0, base + FEATURE_EN);
538 }
539
540 static int sym53c416_probeirq(int base, int scsi_id)
541 {
542 int irq, irqs;
543 unsigned long i;
544
545 /* Clear interrupt register */
546 inb(base + INT_REG);
547 /* Start probing for irq's */
548 irqs = probe_irq_on();
549 /* Reinit chip */
550 sym53c416_init(base, scsi_id);
551 /* Cause interrupt */
552 outb(NOOP, base + COMMAND_REG);
553 outb(ILLEGAL, base + COMMAND_REG);
554 outb(0x07, base + DEST_BUS_ID);
555 outb(0x00, base + DEST_BUS_ID);
556 /* Wait for interrupt to occur */
557 i = jiffies + 20;
558 while(time_before(jiffies, i) && !(inb(base + STATUS_REG) & SCI))
559 barrier();
560 if(time_before_eq(i, jiffies)) /* timed out */
561 return 0;
562 /* Get occurred irq */
563 irq = probe_irq_off(irqs);
564 sym53c416_init(base, scsi_id);
565 return irq;
566 }
567
568 /* Setup: sym53c416=base,irq */
569 void sym53c416_setup(char *str, int *ints)
570 {
571 int i;
572
573 if(host_index >= MAXHOSTS)
574 {
575 printk(KERN_WARNING "sym53c416: Too many hosts defined\n");
576 return;
577 }
578 if(ints[0] < 1 || ints[0] > 2)
579 {
580 printk(KERN_ERR "sym53c416: Wrong number of parameters:\n");
581 printk(KERN_ERR "sym53c416: usage: sym53c416=<base>[,<irq>]\n");
582 return;
583 }
584 for(i = 0; i < host_index && i >= 0; i++)
585 if(hosts[i].base == ints[1])
586 i = -2;
587 if(i >= 0)
588 {
589 hosts[host_index].base = ints[1];
590 hosts[host_index].irq = (ints[0] == 2)? ints[2] : 0;
591 host_index++;
592 }
593 }
594
595 static int sym53c416_test(int base)
596 {
597 outb(RESET_CHIP, base + COMMAND_REG);
598 outb(NOOP, base + COMMAND_REG);
599 if(inb(base + COMMAND_REG) != NOOP)
600 return 0;
601 if(!inb(base + TC_HIGH) || inb(base + TC_HIGH) == 0xFF)
602 return 0;
603 if((inb(base + PIO_INT_REG) & (FULL | EMPTY | CE | OUE | FIE | EIE)) != EMPTY)
604 return 0;
605 return 1;
606 }
607
608
609 static struct isapnp_device_id id_table[] __devinitdata = {
610 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
611 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4161), 0 },
612 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
613 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4163), 0 },
614 { ISAPNP_DEVICE_SINGLE_END }
615 };
616
617 MODULE_DEVICE_TABLE(isapnp, id_table);
618
619 static void sym53c416_probe(void)
620 {
621 int *base = probeaddrs;
622 int ints[2];
623
624 ints[0] = 1;
625 for(; *base; base++) {
626 if (request_region(*base, IO_RANGE, ID)) {
627 if (sym53c416_test(*base)) {
628 ints[1] = *base;
629 sym53c416_setup(NULL, ints);
630 }
631 release_region(*base, IO_RANGE);
632 }
633 }
634 }
635
636 int __init sym53c416_detect(Scsi_Host_Template *tpnt)
637 {
638 unsigned long flags;
639 struct Scsi_Host * shpnt = NULL;
640 int i;
641 int count;
642 struct pnp_dev *idev = NULL;
643
644 #ifdef MODULE
645 int ints[3];
646
647 ints[0] = 2;
648 if(sym53c416_base)
649 {
650 ints[1] = sym53c416_base[0];
651 ints[2] = sym53c416_base[1];
652 sym53c416_setup(NULL, ints);
653 }
654 if(sym53c416_base_1)
655 {
656 ints[1] = sym53c416_base_1[0];
657 ints[2] = sym53c416_base_1[1];
658 sym53c416_setup(NULL, ints);
659 }
660 if(sym53c416_base_2)
661 {
662 ints[1] = sym53c416_base_2[0];
663 ints[2] = sym53c416_base_2[1];
664 sym53c416_setup(NULL, ints);
665 }
666 if(sym53c416_base_3)
667 {
668 ints[1] = sym53c416_base_3[0];
669 ints[2] = sym53c416_base_3[1];
670 sym53c416_setup(NULL, ints);
671 }
672 #endif
673 printk(KERN_INFO "sym53c416.c: %s\n", VERSION_STRING);
674
675 for (i=0; id_table[i].vendor != 0; i++) {
676 while((idev=pnp_find_dev(NULL, id_table[i].vendor,
677 id_table[i].function, idev))!=NULL)
678 {
679 int i[3];
680
681 if(pnp_device_attach(idev)<0)
682 {
683 printk(KERN_WARNING "sym53c416: unable to attach PnP device.\n");
684 continue;
685 }
686 if(pnp_activate_dev(idev) < 0)
687 {
688 printk(KERN_WARNING "sym53c416: unable to activate PnP device.\n");
689 pnp_device_detach(idev);
690 continue;
691
692 }
693
694 i[0] = 2;
695 i[1] = pnp_port_start(idev, 0);
696 i[2] = pnp_irq(idev, 0);
697
698 printk(KERN_INFO "sym53c416: ISAPnP card found and configured at 0x%X, IRQ %d.\n",
699 i[1], i[2]);
700 sym53c416_setup(NULL, i);
701 }
702 }
703 sym53c416_probe();
704
705 /* Now we register and set up each host adapter found... */
706 for(count = 0, i = 0; i < host_index; i++) {
707 if (!request_region(hosts[i].base, IO_RANGE, ID))
708 continue;
709 if (!sym53c416_test(hosts[i].base)) {
710 printk(KERN_WARNING "No sym53c416 found at address 0x%03x\n", hosts[i].base);
711 goto fail_release_region;
712 }
713
714 /* We don't have an irq yet, so we should probe for one */
715 if (!hosts[i].irq)
716 hosts[i].irq = sym53c416_probeirq(hosts[i].base, hosts[i].scsi_id);
717 if (!hosts[i].irq)
718 goto fail_release_region;
719
720 shpnt = scsi_register(tpnt, 0);
721 if (!shpnt)
722 goto fail_release_region;
723 /* Request for specified IRQ */
724 if (request_irq(hosts[i].irq, sym53c416_intr_handle, 0, ID, shpnt))
725 goto fail_free_host;
726
727 spin_lock_irqsave(&sym53c416_lock, flags);
728 shpnt->unique_id = hosts[i].base;
729 shpnt->io_port = hosts[i].base;
730 shpnt->n_io_port = IO_RANGE;
731 shpnt->irq = hosts[i].irq;
732 shpnt->this_id = hosts[i].scsi_id;
733 sym53c416_init(hosts[i].base, hosts[i].scsi_id);
734 count++;
735 spin_unlock_irqrestore(&sym53c416_lock, flags);
736 continue;
737
738 fail_free_host:
739 scsi_unregister(shpnt);
740 fail_release_region:
741 release_region(hosts[i].base, IO_RANGE);
742 }
743 return count;
744 }
745
746 const char *sym53c416_info(struct Scsi_Host *SChost)
747 {
748 int i;
749 int base = SChost->io_port;
750 int irq = SChost->irq;
751 int scsi_id = 0;
752 int rev = inb(base + TC_HIGH);
753
754 for(i = 0; i < host_index; i++)
755 if(hosts[i].base == base)
756 scsi_id = hosts[i].scsi_id;
757 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");
758 return info;
759 }
760
761 int sym53c416_queuecommand(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
762 {
763 int base;
764 unsigned long flags = 0;
765 int i;
766
767 /* Store base register as we can have more than one controller in the system */
768 base = SCpnt->device->host->io_port;
769 current_command = SCpnt; /* set current command */
770 current_command->scsi_done = done; /* set ptr to done function */
771 current_command->SCp.phase = command_ph; /* currect phase is the command phase */
772 current_command->SCp.Status = 0;
773 current_command->SCp.Message = 0;
774
775 spin_lock_irqsave(&sym53c416_lock, flags);
776 outb(SCpnt->device->id, base + DEST_BUS_ID); /* Set scsi id target */
777 outb(FLUSH_FIFO, base + COMMAND_REG); /* Flush SCSI and PIO FIFO's */
778 /* Write SCSI command into the SCSI fifo */
779 for(i = 0; i < SCpnt->cmd_len; i++)
780 outb(SCpnt->cmnd[i], base + SCSI_FIFO);
781 /* Start selection sequence */
782 outb(SEL_WITHOUT_ATN_SEQ, base + COMMAND_REG);
783 /* Now an interrupt will be generated which we will catch in out interrupt routine */
784 spin_unlock_irqrestore(&sym53c416_lock, flags);
785 return 0;
786 }
787
788 static int sym53c416_host_reset(Scsi_Cmnd *SCpnt)
789 {
790 int base;
791 int scsi_id = -1;
792 int i;
793 unsigned long flags;
794
795 spin_lock_irqsave(&sym53c416_lock, flags);
796
797 /* printk("sym53c416_reset\n"); */
798 base = SCpnt->device->host->io_port;
799 /* search scsi_id - fixme, we shouldnt need to iterate for this! */
800 for(i = 0; i < host_index && scsi_id == -1; i++)
801 if(hosts[i].base == base)
802 scsi_id = hosts[i].scsi_id;
803 outb(RESET_CHIP, base + COMMAND_REG);
804 outb(NOOP | PIO_MODE, base + COMMAND_REG);
805 outb(RESET_SCSI_BUS, base + COMMAND_REG);
806 sym53c416_init(base, scsi_id);
807
808 spin_unlock_irqrestore(&sym53c416_lock, flags);
809 return SUCCESS;
810 }
811
812 static int sym53c416_release(struct Scsi_Host *shost)
813 {
814 if (shost->irq)
815 free_irq(shost->irq, shost);
816 if (shost->io_port && shost->n_io_port)
817 release_region(shost->io_port, shost->n_io_port);
818 return 0;
819 }
820
821 static int sym53c416_bios_param(struct scsi_device *sdev,
822 struct block_device *dev,
823 sector_t capacity, int *ip)
824 {
825 int size;
826
827 size = capacity;
828 ip[0] = 64; /* heads */
829 ip[1] = 32; /* sectors */
830 if((ip[2] = size >> 11) > 1024) /* cylinders, test for big disk */
831 {
832 ip[0] = 255; /* heads */
833 ip[1] = 63; /* sectors */
834 ip[2] = size / (255 * 63); /* cylinders */
835 }
836 return 0;
837 }
838
839 /* Loadable module support */
840 #ifdef MODULE
841
842 MODULE_AUTHOR("Lieven Willems");
843 MODULE_LICENSE("GPL");
844
845 module_param_array(sym53c416, uint, NULL, 0);
846 module_param_array(sym53c416_1, uint, NULL, 0);
847 module_param_array(sym53c416_2, uint, NULL, 0);
848 module_param_array(sym53c416_3, uint, NULL, 0);
849
850 #endif
851
852 static Scsi_Host_Template driver_template = {
853 .proc_name = "sym53c416",
854 .name = "Symbios Logic 53c416",
855 .detect = sym53c416_detect,
856 .info = sym53c416_info,
857 .queuecommand = sym53c416_queuecommand,
858 .eh_host_reset_handler =sym53c416_host_reset,
859 .release = sym53c416_release,
860 .bios_param = sym53c416_bios_param,
861 .can_queue = 1,
862 .this_id = SYM53C416_SCSI_ID,
863 .sg_tablesize = 32,
864 .cmd_per_lun = 1,
865 .unchecked_isa_dma = 1,
866 .use_clustering = ENABLE_CLUSTERING,
867 };
868 #include "scsi_module.c"
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree