pasemi_mac: clear out old errors on interface open
[linux-2.6] / 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  *  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/interrupt.h>
36 #include <linux/delay.h>
37 #include <linux/proc_fs.h>
38 #include <linux/spinlock.h>
39 #include <asm/dma.h>
40 #include <asm/system.h>
41 #include <asm/io.h>
42 #include <linux/blkdev.h>
43 #include <linux/isapnp.h>
44 #include "scsi.h"
45 #include <scsi/scsi_host.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 MAXHOSTS 4
198
199 #define SG_ADDRESS(buffer)     ((char *) (page_address((buffer)->page)+(buffer)->offset))
200
201 enum phases
202 {
203         idle,
204         data_out,
205         data_in,
206         command_ph,
207         status_ph,
208         message_out,
209         message_in
210 };
211
212 typedef struct
213 {
214         int base;
215         int irq;
216         int scsi_id;
217 } host;
218
219 static host hosts[MAXHOSTS] = {
220                        {0, 0, SYM53C416_SCSI_ID},
221                        {0, 0, SYM53C416_SCSI_ID},
222                        {0, 0, SYM53C416_SCSI_ID},
223                        {0, 0, SYM53C416_SCSI_ID}
224                        };
225
226 static int host_index = 0;
227 static char info[120];
228 static Scsi_Cmnd *current_command = NULL;
229 static int fastpio = 1;
230
231 static int probeaddrs[] = {0x200, 0x220, 0x240, 0};
232
233 static void sym53c416_set_transfer_counter(int base, unsigned int len)
234 {
235         /* Program Transfer Counter */
236         outb(len & 0x0000FF, base + TC_LOW);
237         outb((len & 0x00FF00) >> 8, base + TC_MID);
238         outb((len & 0xFF0000) >> 16, base + TC_HIGH);
239 }
240
241 static DEFINE_SPINLOCK(sym53c416_lock);
242
243 /* Returns the number of bytes read */
244 static __inline__ unsigned int sym53c416_read(int base, unsigned char *buffer, unsigned int len)
245 {
246         unsigned int orig_len = len;
247         unsigned long flags = 0;
248         unsigned int bytes_left;
249         unsigned long i;
250         int timeout = READ_TIMEOUT;
251
252         /* Do transfer */
253         spin_lock_irqsave(&sym53c416_lock, flags);
254         while(len && timeout)
255         {
256                 bytes_left = inb(base + PIO_FIFO_CNT); /* Number of bytes in the PIO FIFO */
257                 if(fastpio && bytes_left > 3)
258                 {
259                         insl(base + PIO_FIFO_1, buffer, bytes_left >> 2);
260                         buffer += bytes_left & 0xFC;
261                         len -= bytes_left & 0xFC;
262                 }
263                 else if(bytes_left > 0)
264                 {
265                         len -= bytes_left;
266                         for(; bytes_left > 0; bytes_left--)
267                                 *(buffer++) = inb(base + PIO_FIFO_1);
268                 }
269                 else
270                 {
271                         i = jiffies + timeout;
272                         spin_unlock_irqrestore(&sym53c416_lock, flags);
273                         while(time_before(jiffies, i) && (inb(base + PIO_INT_REG) & EMPTY) && timeout)
274                                 if(inb(base + PIO_INT_REG) & SCI)
275                                         timeout = 0;
276                         spin_lock_irqsave(&sym53c416_lock, flags);
277                         if(inb(base + PIO_INT_REG) & EMPTY)
278                                 timeout = 0;
279                 }
280         }
281         spin_unlock_irqrestore(&sym53c416_lock, flags);
282         return orig_len - len;
283 }
284
285 /* Returns the number of bytes written */
286 static __inline__ unsigned int sym53c416_write(int base, unsigned char *buffer, unsigned int len)
287 {
288         unsigned int orig_len = len;
289         unsigned long flags = 0;
290         unsigned int bufferfree;
291         unsigned long i;
292         unsigned int timeout = WRITE_TIMEOUT;
293
294         /* Do transfer */
295         spin_lock_irqsave(&sym53c416_lock, flags);
296         while(len && timeout)
297         {
298                 bufferfree = PIO_SIZE - inb(base + PIO_FIFO_CNT);
299                 if(bufferfree > len)
300                         bufferfree = len;
301                 if(fastpio && bufferfree > 3)
302                 {
303                         outsl(base + PIO_FIFO_1, buffer, bufferfree >> 2);
304                         buffer += bufferfree & 0xFC;
305                         len -= bufferfree & 0xFC;
306                 }
307                 else if(bufferfree > 0)
308                 {
309                         len -= bufferfree;
310                         for(; bufferfree > 0; bufferfree--)
311                                 outb(*(buffer++), base + PIO_FIFO_1);
312                 }
313                 else
314                 {
315                         i = jiffies + timeout;
316                         spin_unlock_irqrestore(&sym53c416_lock, flags);
317                         while(time_before(jiffies, i) && (inb(base + PIO_INT_REG) & FULL) && timeout)
318                                 ;
319                         spin_lock_irqsave(&sym53c416_lock, flags);
320                         if(inb(base + PIO_INT_REG) & FULL)
321                                 timeout = 0;
322                 }
323         }
324         spin_unlock_irqrestore(&sym53c416_lock, flags);
325         return orig_len - len;
326 }
327
328 static irqreturn_t sym53c416_intr_handle(int irq, void *dev_id)
329 {
330         struct Scsi_Host *dev = dev_id;
331         int base = 0;
332         int i;
333         unsigned long flags = 0;
334         unsigned char status_reg, pio_int_reg, int_reg;
335         struct scatterlist *sg;
336         unsigned int tot_trans = 0;
337
338         /* We search the base address of the host adapter which caused the interrupt */
339         /* FIXME: should pass dev_id sensibly as hosts[i] */
340         for(i = 0; i < host_index && !base; i++)
341                 if(irq == hosts[i].irq)
342                         base = hosts[i].base;
343         /* If no adapter found, we cannot handle the interrupt. Leave a message */
344         /* and continue. This should never happen...                            */
345         if(!base)
346         {
347                 printk(KERN_ERR "sym53c416: No host adapter defined for interrupt %d\n", irq);
348                 return IRQ_NONE;
349         }
350         /* Now we have the base address and we can start handling the interrupt */
351
352         spin_lock_irqsave(dev->host_lock,flags);
353         status_reg = inb(base + STATUS_REG);
354         pio_int_reg = inb(base + PIO_INT_REG);
355         int_reg = inb(base + INT_REG);
356         spin_unlock_irqrestore(dev->host_lock, flags);
357
358         /* First, we handle error conditions */
359         if(int_reg & SCI)         /* SCSI Reset */
360         {
361                 printk(KERN_DEBUG "sym53c416: Reset received\n");
362                 current_command->SCp.phase = idle;
363                 current_command->result = DID_RESET << 16;
364                 spin_lock_irqsave(dev->host_lock, flags);
365                 current_command->scsi_done(current_command);
366                 spin_unlock_irqrestore(dev->host_lock, flags);
367                 goto out;
368         }
369         if(int_reg & ILCMD)       /* Illegal Command */
370         {
371                 printk(KERN_WARNING "sym53c416: Illegal Command: 0x%02x.\n", inb(base + COMMAND_REG));
372                 current_command->SCp.phase = idle;
373                 current_command->result = DID_ERROR << 16;
374                 spin_lock_irqsave(dev->host_lock, flags);
375                 current_command->scsi_done(current_command);
376                 spin_unlock_irqrestore(dev->host_lock, flags);
377                 goto out;
378         }
379         if(status_reg & GE)         /* Gross Error */
380         {
381                 printk(KERN_WARNING "sym53c416: Controller reports gross error.\n");
382                 current_command->SCp.phase = idle;
383                 current_command->result = DID_ERROR << 16;
384                 spin_lock_irqsave(dev->host_lock, flags);
385                 current_command->scsi_done(current_command);
386                 spin_unlock_irqrestore(dev->host_lock, flags);
387                 goto out;
388         }
389         if(status_reg & PE)         /* Parity Error */
390         {
391                 printk(KERN_WARNING "sym53c416:SCSI parity error.\n");
392                 current_command->SCp.phase = idle;
393                 current_command->result = DID_PARITY << 16;
394                 spin_lock_irqsave(dev->host_lock, flags);
395                 current_command->scsi_done(current_command);
396                 spin_unlock_irqrestore(dev->host_lock, flags);
397                 goto out;
398         }
399         if(pio_int_reg & (CE | OUE))
400         {
401                 printk(KERN_WARNING "sym53c416: PIO interrupt error.\n");
402                 current_command->SCp.phase = idle;
403                 current_command->result = DID_ERROR << 16;
404                 spin_lock_irqsave(dev->host_lock, flags);
405                 current_command->scsi_done(current_command);
406                 spin_unlock_irqrestore(dev->host_lock, flags);
407                 goto out;
408         }
409         if(int_reg & DIS)           /* Disconnect */
410         {
411                 if(current_command->SCp.phase != message_in)
412                         current_command->result = DID_NO_CONNECT << 16;
413                 else
414                         current_command->result = (current_command->SCp.Status & 0xFF) | ((current_command->SCp.Message & 0xFF) << 8) | (DID_OK << 16);
415                 current_command->SCp.phase = idle;
416                 spin_lock_irqsave(dev->host_lock, flags);
417                 current_command->scsi_done(current_command);
418                 spin_unlock_irqrestore(dev->host_lock, flags);
419                 goto out;
420         }
421         /* Now we handle SCSI phases         */
422
423         switch(status_reg & PHBITS)       /* Filter SCSI phase out of status reg */
424         {
425                 case PHASE_DATA_OUT:
426                 {
427                         if(int_reg & BS)
428                         {
429                                 current_command->SCp.phase = data_out;
430                                 outb(FLUSH_FIFO, base + COMMAND_REG);
431                                 sym53c416_set_transfer_counter(base,
432                                                                scsi_bufflen(current_command));
433                                 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
434
435                                 scsi_for_each_sg(current_command,
436                                                  sg, scsi_sg_count(current_command), i) {
437                                         tot_trans += sym53c416_write(base,
438                                                                      SG_ADDRESS(sg),
439                                                                      sg->length);
440                                 }
441                                 if(tot_trans < current_command->underflow)
442                                         printk(KERN_WARNING "sym53c416: Underflow, wrote %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
443                         }
444                         break;
445                 }
446
447                 case PHASE_DATA_IN:
448                 {
449                         if(int_reg & BS)
450                         {
451                                 current_command->SCp.phase = data_in;
452                                 outb(FLUSH_FIFO, base + COMMAND_REG);
453                                 sym53c416_set_transfer_counter(base,
454                                                                scsi_bufflen(current_command));
455
456                                 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
457
458                                 scsi_for_each_sg(current_command,
459                                                  sg, scsi_sg_count(current_command), i) {
460                                         tot_trans += sym53c416_read(base,
461                                                                     SG_ADDRESS(sg),
462                                                                     sg->length);
463                                 }
464                                 if(tot_trans < current_command->underflow)
465                                         printk(KERN_WARNING "sym53c416: Underflow, read %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
466                         }
467                         break;
468                 }
469
470                 case PHASE_COMMAND:
471                 {
472                         current_command->SCp.phase = command_ph;
473                         printk(KERN_ERR "sym53c416: Unknown interrupt in command phase.\n");
474                         break;
475                 }
476
477                 case PHASE_STATUS:
478                 {
479                         current_command->SCp.phase = status_ph;
480                         outb(FLUSH_FIFO, base + COMMAND_REG);
481                         outb(INIT_COMM_COMPLETE_SEQ, base + COMMAND_REG);
482                         break;
483                 }
484                 
485                 case PHASE_RESERVED_1:
486                 case PHASE_RESERVED_2:
487                 {
488                         printk(KERN_ERR "sym53c416: Reserved phase occurred.\n");
489                         break;
490                 }
491
492                 case PHASE_MESSAGE_OUT:
493                 {
494                         current_command->SCp.phase = message_out;
495                         outb(SET_ATN, base + COMMAND_REG);
496                         outb(MSG_ACCEPTED, base + COMMAND_REG);
497                         break;
498                 }
499
500                 case PHASE_MESSAGE_IN:
501                 {
502                         current_command->SCp.phase = message_in;
503                         current_command->SCp.Status = inb(base + SCSI_FIFO);
504                         current_command->SCp.Message = inb(base + SCSI_FIFO);
505                         if(current_command->SCp.Message == SAVE_POINTERS || current_command->SCp.Message == DISCONNECT)
506                                 outb(SET_ATN, base + COMMAND_REG);
507                         outb(MSG_ACCEPTED, base + COMMAND_REG);
508                         break;
509                 }
510         }
511 out:
512         return IRQ_HANDLED;
513 }
514
515 static void sym53c416_init(int base, int scsi_id)
516 {
517         outb(RESET_CHIP, base + COMMAND_REG);
518         outb(NOOP, base + COMMAND_REG);
519         outb(0x99, base + TOM); /* Time out of 250 ms */
520         outb(0x05, base + STP);
521         outb(0x00, base + SYNC_OFFSET);
522         outb(EPC | scsi_id, base + CONF_REG_1);
523         outb(FE | SCSI2 | TBPA, base + CONF_REG_2);
524         outb(IDMRC | QTE | CDB10 | FSCSI | FCLK, base + CONF_REG_3);
525         outb(0x83 | EAN, base + CONF_REG_4);
526         outb(IE | WSE0, base + CONF_REG_5);
527         outb(0, base + FEATURE_EN);
528 }
529
530 static int sym53c416_probeirq(int base, int scsi_id)
531 {
532         int irq, irqs;
533         unsigned long i;
534
535         /* Clear interrupt register */
536         inb(base + INT_REG);
537         /* Start probing for irq's */
538         irqs = probe_irq_on();
539         /* Reinit chip */
540         sym53c416_init(base, scsi_id);
541         /* Cause interrupt */
542         outb(NOOP, base + COMMAND_REG);
543         outb(ILLEGAL, base + COMMAND_REG);
544         outb(0x07, base + DEST_BUS_ID);
545         outb(0x00, base + DEST_BUS_ID);
546         /* Wait for interrupt to occur */
547         i = jiffies + 20;
548         while(time_before(jiffies, i) && !(inb(base + STATUS_REG) & SCI))
549                 barrier();
550         if(time_before_eq(i, jiffies))  /* timed out */
551                 return 0;
552         /* Get occurred irq */
553         irq = probe_irq_off(irqs);
554         sym53c416_init(base, scsi_id);
555         return irq;
556 }
557
558 /* Setup: sym53c416=base,irq */
559 void sym53c416_setup(char *str, int *ints)
560 {
561         int i;
562
563         if(host_index >= MAXHOSTS)
564         {
565                 printk(KERN_WARNING "sym53c416: Too many hosts defined\n");
566                 return;
567         }
568         if(ints[0] < 1 || ints[0] > 2)
569         {
570                 printk(KERN_ERR "sym53c416: Wrong number of parameters:\n");
571                 printk(KERN_ERR "sym53c416: usage: sym53c416=<base>[,<irq>]\n");
572                 return;
573         }
574         for(i = 0; i < host_index && i >= 0; i++)
575                 if(hosts[i].base == ints[1])
576                         i = -2;
577         if(i >= 0)
578         {
579                 hosts[host_index].base = ints[1];
580                 hosts[host_index].irq = (ints[0] == 2)? ints[2] : 0;
581                 host_index++;
582         }
583 }
584
585 static int sym53c416_test(int base)
586 {
587         outb(RESET_CHIP, base + COMMAND_REG);
588         outb(NOOP, base + COMMAND_REG);
589         if(inb(base + COMMAND_REG) != NOOP)
590                 return 0;
591         if(!inb(base + TC_HIGH) || inb(base + TC_HIGH) == 0xFF)
592                 return 0;
593         if((inb(base + PIO_INT_REG) & (FULL | EMPTY | CE | OUE | FIE | EIE)) != EMPTY)
594                 return 0;
595         return 1;
596 }
597
598
599 static struct isapnp_device_id id_table[] __devinitdata = {
600         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
601                 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4161), 0 },
602         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
603                 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4163), 0 },
604         {       ISAPNP_DEVICE_SINGLE_END }
605 };
606
607 MODULE_DEVICE_TABLE(isapnp, id_table);
608
609 static void sym53c416_probe(void)
610 {
611         int *base = probeaddrs;
612         int ints[2];
613
614         ints[0] = 1;
615         for(; *base; base++) {
616                 if (request_region(*base, IO_RANGE, ID)) {
617                         if (sym53c416_test(*base)) {
618                                 ints[1] = *base;
619                                 sym53c416_setup(NULL, ints);
620                         }
621                         release_region(*base, IO_RANGE);
622                 }
623         }
624 }
625
626 int __init sym53c416_detect(struct scsi_host_template *tpnt)
627 {
628         unsigned long flags;
629         struct Scsi_Host * shpnt = NULL;
630         int i;
631         int count;
632         struct pnp_dev *idev = NULL;
633         
634 #ifdef MODULE
635         int ints[3];
636
637         ints[0] = 2;
638         if(sym53c416_base)
639         {
640                 ints[1] = sym53c416_base[0];
641                 ints[2] = sym53c416_base[1];
642                 sym53c416_setup(NULL, ints);
643         }
644         if(sym53c416_base_1)
645         {
646                 ints[1] = sym53c416_base_1[0];
647                 ints[2] = sym53c416_base_1[1];
648                 sym53c416_setup(NULL, ints);
649         }
650         if(sym53c416_base_2)
651         {
652                 ints[1] = sym53c416_base_2[0];
653                 ints[2] = sym53c416_base_2[1];
654                 sym53c416_setup(NULL, ints);
655         }
656         if(sym53c416_base_3)
657         {
658                 ints[1] = sym53c416_base_3[0];
659                 ints[2] = sym53c416_base_3[1];
660                 sym53c416_setup(NULL, ints);
661         }
662 #endif
663         printk(KERN_INFO "sym53c416.c: %s\n", VERSION_STRING);
664
665         for (i=0; id_table[i].vendor != 0; i++) {
666                 while((idev=pnp_find_dev(NULL, id_table[i].vendor,
667                                         id_table[i].function, idev))!=NULL)
668                 {
669                         int i[3];
670
671                         if(pnp_device_attach(idev)<0)
672                         {
673                                 printk(KERN_WARNING "sym53c416: unable to attach PnP device.\n");
674                                 continue;
675                         }
676                         if(pnp_activate_dev(idev) < 0)
677                         {
678                                 printk(KERN_WARNING "sym53c416: unable to activate PnP device.\n");
679                                 pnp_device_detach(idev);
680                                 continue;
681                         
682                         }
683
684                         i[0] = 2;
685                         i[1] = pnp_port_start(idev, 0);
686                         i[2] = pnp_irq(idev, 0);
687
688                         printk(KERN_INFO "sym53c416: ISAPnP card found and configured at 0x%X, IRQ %d.\n",
689                                 i[1], i[2]);
690                         sym53c416_setup(NULL, i);
691                 }
692         }
693         sym53c416_probe();
694
695         /* Now we register and set up each host adapter found... */
696         for(count = 0, i = 0; i < host_index; i++) {
697                 if (!request_region(hosts[i].base, IO_RANGE, ID))
698                         continue;
699                 if (!sym53c416_test(hosts[i].base)) {
700                         printk(KERN_WARNING "No sym53c416 found at address 0x%03x\n", hosts[i].base);
701                         goto fail_release_region;
702                 }
703
704                 /* We don't have an irq yet, so we should probe for one */
705                 if (!hosts[i].irq)
706                         hosts[i].irq = sym53c416_probeirq(hosts[i].base, hosts[i].scsi_id);
707                 if (!hosts[i].irq)
708                         goto fail_release_region;
709         
710                 shpnt = scsi_register(tpnt, 0);
711                 if (!shpnt)
712                         goto fail_release_region;
713                 /* Request for specified IRQ */
714                 if (request_irq(hosts[i].irq, sym53c416_intr_handle, 0, ID, shpnt))
715                         goto fail_free_host;
716
717                 spin_lock_irqsave(&sym53c416_lock, flags);
718                 shpnt->unique_id = hosts[i].base;
719                 shpnt->io_port = hosts[i].base;
720                 shpnt->n_io_port = IO_RANGE;
721                 shpnt->irq = hosts[i].irq;
722                 shpnt->this_id = hosts[i].scsi_id;
723                 sym53c416_init(hosts[i].base, hosts[i].scsi_id);
724                 count++;
725                 spin_unlock_irqrestore(&sym53c416_lock, flags);
726                 continue;
727
728  fail_free_host:
729                 scsi_unregister(shpnt);
730  fail_release_region:
731                 release_region(hosts[i].base, IO_RANGE);
732         }
733         return count;
734 }
735
736 const char *sym53c416_info(struct Scsi_Host *SChost)
737 {
738         int i;
739         int base = SChost->io_port;
740         int irq = SChost->irq;
741         int scsi_id = 0;
742         int rev = inb(base + TC_HIGH);
743
744         for(i = 0; i < host_index; i++)
745                 if(hosts[i].base == base)
746                         scsi_id = hosts[i].scsi_id;
747         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");
748         return info;
749 }
750
751 int sym53c416_queuecommand(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
752 {
753         int base;
754         unsigned long flags = 0;
755         int i;
756
757         /* Store base register as we can have more than one controller in the system */
758         base = SCpnt->device->host->io_port;
759         current_command = SCpnt;                  /* set current command                */
760         current_command->scsi_done = done;        /* set ptr to done function           */
761         current_command->SCp.phase = command_ph;  /* currect phase is the command phase */
762         current_command->SCp.Status = 0;
763         current_command->SCp.Message = 0;
764
765         spin_lock_irqsave(&sym53c416_lock, flags);
766         outb(scmd_id(SCpnt), base + DEST_BUS_ID); /* Set scsi id target        */
767         outb(FLUSH_FIFO, base + COMMAND_REG);    /* Flush SCSI and PIO FIFO's */
768         /* Write SCSI command into the SCSI fifo */
769         for(i = 0; i < SCpnt->cmd_len; i++)
770                 outb(SCpnt->cmnd[i], base + SCSI_FIFO);
771         /* Start selection sequence */
772         outb(SEL_WITHOUT_ATN_SEQ, base + COMMAND_REG);
773         /* Now an interrupt will be generated which we will catch in out interrupt routine */
774         spin_unlock_irqrestore(&sym53c416_lock, flags);
775         return 0;
776 }
777
778 static int sym53c416_host_reset(Scsi_Cmnd *SCpnt)
779 {
780         int base;
781         int scsi_id = -1;       
782         int i;
783         unsigned long flags;
784
785         spin_lock_irqsave(&sym53c416_lock, flags);
786
787         /* printk("sym53c416_reset\n"); */
788         base = SCpnt->device->host->io_port;
789         /* search scsi_id - fixme, we shouldnt need to iterate for this! */
790         for(i = 0; i < host_index && scsi_id == -1; i++)
791                 if(hosts[i].base == base)
792                         scsi_id = hosts[i].scsi_id;
793         outb(RESET_CHIP, base + COMMAND_REG);
794         outb(NOOP | PIO_MODE, base + COMMAND_REG);
795         outb(RESET_SCSI_BUS, base + COMMAND_REG);
796         sym53c416_init(base, scsi_id);
797
798         spin_unlock_irqrestore(&sym53c416_lock, flags);
799         return SUCCESS;
800 }
801
802 static int sym53c416_release(struct Scsi_Host *shost)
803 {
804         if (shost->irq)
805                 free_irq(shost->irq, shost);
806         if (shost->io_port && shost->n_io_port)
807                 release_region(shost->io_port, shost->n_io_port);
808         return 0;
809 }
810
811 static int sym53c416_bios_param(struct scsi_device *sdev,
812                 struct block_device *dev,
813                 sector_t capacity, int *ip)
814 {
815         int size;
816
817         size = capacity;
818         ip[0] = 64;                             /* heads                        */
819         ip[1] = 32;                             /* sectors                      */
820         if((ip[2] = size >> 11) > 1024)         /* cylinders, test for big disk */
821         {
822                 ip[0] = 255;                    /* heads                        */
823                 ip[1] = 63;                     /* sectors                      */
824                 ip[2] = size / (255 * 63);      /* cylinders                    */
825         }
826         return 0;
827 }
828
829 /* Loadable module support */
830 #ifdef MODULE
831
832 MODULE_AUTHOR("Lieven Willems");
833 MODULE_LICENSE("GPL");
834
835 module_param_array(sym53c416, uint, NULL, 0);
836 module_param_array(sym53c416_1, uint, NULL, 0);
837 module_param_array(sym53c416_2, uint, NULL, 0);
838 module_param_array(sym53c416_3, uint, NULL, 0);
839
840 #endif
841
842 static struct scsi_host_template driver_template = {
843         .proc_name =            "sym53c416",
844         .name =                 "Symbios Logic 53c416",
845         .detect =               sym53c416_detect,
846         .info =                 sym53c416_info, 
847         .queuecommand =         sym53c416_queuecommand,
848         .eh_host_reset_handler =sym53c416_host_reset,
849         .release =              sym53c416_release,
850         .bios_param =           sym53c416_bios_param,
851         .can_queue =            1,
852         .this_id =              SYM53C416_SCSI_ID,
853         .sg_tablesize =         32,
854         .cmd_per_lun =          1,
855         .unchecked_isa_dma =    1,
856         .use_clustering =       ENABLE_CLUSTERING,
857 };
858 #include "scsi_module.c"