Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[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/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 {
331         struct Scsi_Host *dev = dev_id;
332         int base = 0;
333         int i;
334         unsigned long flags = 0;
335         unsigned char status_reg, pio_int_reg, int_reg;
336         struct scatterlist *sglist;
337         unsigned int sgcount;
338         unsigned int tot_trans = 0;
339
340         /* We search the base address of the host adapter which caused the interrupt */
341         /* FIXME: should pass dev_id sensibly as hosts[i] */
342         for(i = 0; i < host_index && !base; i++)
343                 if(irq == hosts[i].irq)
344                         base = hosts[i].base;
345         /* If no adapter found, we cannot handle the interrupt. Leave a message */
346         /* and continue. This should never happen...                            */
347         if(!base)
348         {
349                 printk(KERN_ERR "sym53c416: No host adapter defined for interrupt %d\n", irq);
350                 return IRQ_NONE;
351         }
352         /* Now we have the base address and we can start handling the interrupt */
353
354         spin_lock_irqsave(dev->host_lock,flags);
355         status_reg = inb(base + STATUS_REG);
356         pio_int_reg = inb(base + PIO_INT_REG);
357         int_reg = inb(base + INT_REG);
358         spin_unlock_irqrestore(dev->host_lock, flags);
359
360         /* First, we handle error conditions */
361         if(int_reg & SCI)         /* SCSI Reset */
362         {
363                 printk(KERN_DEBUG "sym53c416: Reset received\n");
364                 current_command->SCp.phase = idle;
365                 current_command->result = DID_RESET << 16;
366                 spin_lock_irqsave(dev->host_lock, flags);
367                 current_command->scsi_done(current_command);
368                 spin_unlock_irqrestore(dev->host_lock, flags);
369                 goto out;
370         }
371         if(int_reg & ILCMD)       /* Illegal Command */
372         {
373                 printk(KERN_WARNING "sym53c416: Illegal Command: 0x%02x.\n", inb(base + COMMAND_REG));
374                 current_command->SCp.phase = idle;
375                 current_command->result = DID_ERROR << 16;
376                 spin_lock_irqsave(dev->host_lock, flags);
377                 current_command->scsi_done(current_command);
378                 spin_unlock_irqrestore(dev->host_lock, flags);
379                 goto out;
380         }
381         if(status_reg & GE)         /* Gross Error */
382         {
383                 printk(KERN_WARNING "sym53c416: Controller reports gross error.\n");
384                 current_command->SCp.phase = idle;
385                 current_command->result = DID_ERROR << 16;
386                 spin_lock_irqsave(dev->host_lock, flags);
387                 current_command->scsi_done(current_command);
388                 spin_unlock_irqrestore(dev->host_lock, flags);
389                 goto out;
390         }
391         if(status_reg & PE)         /* Parity Error */
392         {
393                 printk(KERN_WARNING "sym53c416:SCSI parity error.\n");
394                 current_command->SCp.phase = idle;
395                 current_command->result = DID_PARITY << 16;
396                 spin_lock_irqsave(dev->host_lock, flags);
397                 current_command->scsi_done(current_command);
398                 spin_unlock_irqrestore(dev->host_lock, flags);
399                 goto out;
400         }
401         if(pio_int_reg & (CE | OUE))
402         {
403                 printk(KERN_WARNING "sym53c416: PIO interrupt error.\n");
404                 current_command->SCp.phase = idle;
405                 current_command->result = DID_ERROR << 16;
406                 spin_lock_irqsave(dev->host_lock, flags);
407                 current_command->scsi_done(current_command);
408                 spin_unlock_irqrestore(dev->host_lock, flags);
409                 goto out;
410         }
411         if(int_reg & DIS)           /* Disconnect */
412         {
413                 if(current_command->SCp.phase != message_in)
414                         current_command->result = DID_NO_CONNECT << 16;
415                 else
416                         current_command->result = (current_command->SCp.Status & 0xFF) | ((current_command->SCp.Message & 0xFF) << 8) | (DID_OK << 16);
417                 current_command->SCp.phase = idle;
418                 spin_lock_irqsave(dev->host_lock, flags);
419                 current_command->scsi_done(current_command);
420                 spin_unlock_irqrestore(dev->host_lock, flags);
421                 goto out;
422         }
423         /* Now we handle SCSI phases         */
424
425         switch(status_reg & PHBITS)       /* Filter SCSI phase out of status reg */
426         {
427                 case PHASE_DATA_OUT:
428                 {
429                         if(int_reg & BS)
430                         {
431                                 current_command->SCp.phase = data_out;
432                                 outb(FLUSH_FIFO, base + COMMAND_REG);
433                                 sym53c416_set_transfer_counter(base, current_command->request_bufflen);
434                                 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
435                                 if(!current_command->use_sg)
436                                         tot_trans = sym53c416_write(base, current_command->request_buffer, current_command->request_bufflen);
437                                 else
438                                 {
439                                         sgcount = current_command->use_sg;
440                                         sglist = current_command->request_buffer;
441                                         while(sgcount--)
442                                         {
443                                                 tot_trans += sym53c416_write(base, SG_ADDRESS(sglist), sglist->length);
444                                                 sglist++;
445                                         }
446                                 }
447                                 if(tot_trans < current_command->underflow)
448                                         printk(KERN_WARNING "sym53c416: Underflow, wrote %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
449                         }
450                         break;
451                 }
452
453                 case PHASE_DATA_IN:
454                 {
455                         if(int_reg & BS)
456                         {
457                                 current_command->SCp.phase = data_in;
458                                 outb(FLUSH_FIFO, base + COMMAND_REG);
459                                 sym53c416_set_transfer_counter(base, current_command->request_bufflen);
460                                 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
461                                 if(!current_command->use_sg)
462                                         tot_trans = sym53c416_read(base, current_command->request_buffer, current_command->request_bufflen);
463                                 else
464                                 {
465                                         sgcount = current_command->use_sg;
466                                         sglist = current_command->request_buffer;
467                                         while(sgcount--)
468                                         {
469                                                 tot_trans += sym53c416_read(base, SG_ADDRESS(sglist), sglist->length);
470                                                 sglist++;
471                                         }
472                                 }
473                                 if(tot_trans < current_command->underflow)
474                                         printk(KERN_WARNING "sym53c416: Underflow, read %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
475                         }
476                         break;
477                 }
478
479                 case PHASE_COMMAND:
480                 {
481                         current_command->SCp.phase = command_ph;
482                         printk(KERN_ERR "sym53c416: Unknown interrupt in command phase.\n");
483                         break;
484                 }
485
486                 case PHASE_STATUS:
487                 {
488                         current_command->SCp.phase = status_ph;
489                         outb(FLUSH_FIFO, base + COMMAND_REG);
490                         outb(INIT_COMM_COMPLETE_SEQ, base + COMMAND_REG);
491                         break;
492                 }
493                 
494                 case PHASE_RESERVED_1:
495                 case PHASE_RESERVED_2:
496                 {
497                         printk(KERN_ERR "sym53c416: Reserved phase occurred.\n");
498                         break;
499                 }
500
501                 case PHASE_MESSAGE_OUT:
502                 {
503                         current_command->SCp.phase = message_out;
504                         outb(SET_ATN, base + COMMAND_REG);
505                         outb(MSG_ACCEPTED, base + COMMAND_REG);
506                         break;
507                 }
508
509                 case PHASE_MESSAGE_IN:
510                 {
511                         current_command->SCp.phase = message_in;
512                         current_command->SCp.Status = inb(base + SCSI_FIFO);
513                         current_command->SCp.Message = inb(base + SCSI_FIFO);
514                         if(current_command->SCp.Message == SAVE_POINTERS || current_command->SCp.Message == DISCONNECT)
515                                 outb(SET_ATN, base + COMMAND_REG);
516                         outb(MSG_ACCEPTED, base + COMMAND_REG);
517                         break;
518                 }
519         }
520 out:
521         return IRQ_HANDLED;
522 }
523
524 static void sym53c416_init(int base, int scsi_id)
525 {
526         outb(RESET_CHIP, base + COMMAND_REG);
527         outb(NOOP, base + COMMAND_REG);
528         outb(0x99, base + TOM); /* Time out of 250 ms */
529         outb(0x05, base + STP);
530         outb(0x00, base + SYNC_OFFSET);
531         outb(EPC | scsi_id, base + CONF_REG_1);
532         outb(FE | SCSI2 | TBPA, base + CONF_REG_2);
533         outb(IDMRC | QTE | CDB10 | FSCSI | FCLK, base + CONF_REG_3);
534         outb(0x83 | EAN, base + CONF_REG_4);
535         outb(IE | WSE0, base + CONF_REG_5);
536         outb(0, base + FEATURE_EN);
537 }
538
539 static int sym53c416_probeirq(int base, int scsi_id)
540 {
541         int irq, irqs;
542         unsigned long i;
543
544         /* Clear interrupt register */
545         inb(base + INT_REG);
546         /* Start probing for irq's */
547         irqs = probe_irq_on();
548         /* Reinit chip */
549         sym53c416_init(base, scsi_id);
550         /* Cause interrupt */
551         outb(NOOP, base + COMMAND_REG);
552         outb(ILLEGAL, base + COMMAND_REG);
553         outb(0x07, base + DEST_BUS_ID);
554         outb(0x00, base + DEST_BUS_ID);
555         /* Wait for interrupt to occur */
556         i = jiffies + 20;
557         while(time_before(jiffies, i) && !(inb(base + STATUS_REG) & SCI))
558                 barrier();
559         if(time_before_eq(i, jiffies))  /* timed out */
560                 return 0;
561         /* Get occurred irq */
562         irq = probe_irq_off(irqs);
563         sym53c416_init(base, scsi_id);
564         return irq;
565 }
566
567 /* Setup: sym53c416=base,irq */
568 void sym53c416_setup(char *str, int *ints)
569 {
570         int i;
571
572         if(host_index >= MAXHOSTS)
573         {
574                 printk(KERN_WARNING "sym53c416: Too many hosts defined\n");
575                 return;
576         }
577         if(ints[0] < 1 || ints[0] > 2)
578         {
579                 printk(KERN_ERR "sym53c416: Wrong number of parameters:\n");
580                 printk(KERN_ERR "sym53c416: usage: sym53c416=<base>[,<irq>]\n");
581                 return;
582         }
583         for(i = 0; i < host_index && i >= 0; i++)
584                 if(hosts[i].base == ints[1])
585                         i = -2;
586         if(i >= 0)
587         {
588                 hosts[host_index].base = ints[1];
589                 hosts[host_index].irq = (ints[0] == 2)? ints[2] : 0;
590                 host_index++;
591         }
592 }
593
594 static int sym53c416_test(int base)
595 {
596         outb(RESET_CHIP, base + COMMAND_REG);
597         outb(NOOP, base + COMMAND_REG);
598         if(inb(base + COMMAND_REG) != NOOP)
599                 return 0;
600         if(!inb(base + TC_HIGH) || inb(base + TC_HIGH) == 0xFF)
601                 return 0;
602         if((inb(base + PIO_INT_REG) & (FULL | EMPTY | CE | OUE | FIE | EIE)) != EMPTY)
603                 return 0;
604         return 1;
605 }
606
607
608 static struct isapnp_device_id id_table[] __devinitdata = {
609         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
610                 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4161), 0 },
611         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
612                 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4163), 0 },
613         {       ISAPNP_DEVICE_SINGLE_END }
614 };
615
616 MODULE_DEVICE_TABLE(isapnp, id_table);
617
618 static void sym53c416_probe(void)
619 {
620         int *base = probeaddrs;
621         int ints[2];
622
623         ints[0] = 1;
624         for(; *base; base++) {
625                 if (request_region(*base, IO_RANGE, ID)) {
626                         if (sym53c416_test(*base)) {
627                                 ints[1] = *base;
628                                 sym53c416_setup(NULL, ints);
629                         }
630                         release_region(*base, IO_RANGE);
631                 }
632         }
633 }
634
635 int __init sym53c416_detect(struct scsi_host_template *tpnt)
636 {
637         unsigned long flags;
638         struct Scsi_Host * shpnt = NULL;
639         int i;
640         int count;
641         struct pnp_dev *idev = NULL;
642         
643 #ifdef MODULE
644         int ints[3];
645
646         ints[0] = 2;
647         if(sym53c416_base)
648         {
649                 ints[1] = sym53c416_base[0];
650                 ints[2] = sym53c416_base[1];
651                 sym53c416_setup(NULL, ints);
652         }
653         if(sym53c416_base_1)
654         {
655                 ints[1] = sym53c416_base_1[0];
656                 ints[2] = sym53c416_base_1[1];
657                 sym53c416_setup(NULL, ints);
658         }
659         if(sym53c416_base_2)
660         {
661                 ints[1] = sym53c416_base_2[0];
662                 ints[2] = sym53c416_base_2[1];
663                 sym53c416_setup(NULL, ints);
664         }
665         if(sym53c416_base_3)
666         {
667                 ints[1] = sym53c416_base_3[0];
668                 ints[2] = sym53c416_base_3[1];
669                 sym53c416_setup(NULL, ints);
670         }
671 #endif
672         printk(KERN_INFO "sym53c416.c: %s\n", VERSION_STRING);
673
674         for (i=0; id_table[i].vendor != 0; i++) {
675                 while((idev=pnp_find_dev(NULL, id_table[i].vendor,
676                                         id_table[i].function, idev))!=NULL)
677                 {
678                         int i[3];
679
680                         if(pnp_device_attach(idev)<0)
681                         {
682                                 printk(KERN_WARNING "sym53c416: unable to attach PnP device.\n");
683                                 continue;
684                         }
685                         if(pnp_activate_dev(idev) < 0)
686                         {
687                                 printk(KERN_WARNING "sym53c416: unable to activate PnP device.\n");
688                                 pnp_device_detach(idev);
689                                 continue;
690                         
691                         }
692
693                         i[0] = 2;
694                         i[1] = pnp_port_start(idev, 0);
695                         i[2] = pnp_irq(idev, 0);
696
697                         printk(KERN_INFO "sym53c416: ISAPnP card found and configured at 0x%X, IRQ %d.\n",
698                                 i[1], i[2]);
699                         sym53c416_setup(NULL, i);
700                 }
701         }
702         sym53c416_probe();
703
704         /* Now we register and set up each host adapter found... */
705         for(count = 0, i = 0; i < host_index; i++) {
706                 if (!request_region(hosts[i].base, IO_RANGE, ID))
707                         continue;
708                 if (!sym53c416_test(hosts[i].base)) {
709                         printk(KERN_WARNING "No sym53c416 found at address 0x%03x\n", hosts[i].base);
710                         goto fail_release_region;
711                 }
712
713                 /* We don't have an irq yet, so we should probe for one */
714                 if (!hosts[i].irq)
715                         hosts[i].irq = sym53c416_probeirq(hosts[i].base, hosts[i].scsi_id);
716                 if (!hosts[i].irq)
717                         goto fail_release_region;
718         
719                 shpnt = scsi_register(tpnt, 0);
720                 if (!shpnt)
721                         goto fail_release_region;
722                 /* Request for specified IRQ */
723                 if (request_irq(hosts[i].irq, sym53c416_intr_handle, 0, ID, shpnt))
724                         goto fail_free_host;
725
726                 spin_lock_irqsave(&sym53c416_lock, flags);
727                 shpnt->unique_id = hosts[i].base;
728                 shpnt->io_port = hosts[i].base;
729                 shpnt->n_io_port = IO_RANGE;
730                 shpnt->irq = hosts[i].irq;
731                 shpnt->this_id = hosts[i].scsi_id;
732                 sym53c416_init(hosts[i].base, hosts[i].scsi_id);
733                 count++;
734                 spin_unlock_irqrestore(&sym53c416_lock, flags);
735                 continue;
736
737  fail_free_host:
738                 scsi_unregister(shpnt);
739  fail_release_region:
740                 release_region(hosts[i].base, IO_RANGE);
741         }
742         return count;
743 }
744
745 const char *sym53c416_info(struct Scsi_Host *SChost)
746 {
747         int i;
748         int base = SChost->io_port;
749         int irq = SChost->irq;
750         int scsi_id = 0;
751         int rev = inb(base + TC_HIGH);
752
753         for(i = 0; i < host_index; i++)
754                 if(hosts[i].base == base)
755                         scsi_id = hosts[i].scsi_id;
756         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");
757         return info;
758 }
759
760 int sym53c416_queuecommand(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
761 {
762         int base;
763         unsigned long flags = 0;
764         int i;
765
766         /* Store base register as we can have more than one controller in the system */
767         base = SCpnt->device->host->io_port;
768         current_command = SCpnt;                  /* set current command                */
769         current_command->scsi_done = done;        /* set ptr to done function           */
770         current_command->SCp.phase = command_ph;  /* currect phase is the command phase */
771         current_command->SCp.Status = 0;
772         current_command->SCp.Message = 0;
773
774         spin_lock_irqsave(&sym53c416_lock, flags);
775         outb(scmd_id(SCpnt), base + DEST_BUS_ID); /* Set scsi id target        */
776         outb(FLUSH_FIFO, base + COMMAND_REG);    /* Flush SCSI and PIO FIFO's */
777         /* Write SCSI command into the SCSI fifo */
778         for(i = 0; i < SCpnt->cmd_len; i++)
779                 outb(SCpnt->cmnd[i], base + SCSI_FIFO);
780         /* Start selection sequence */
781         outb(SEL_WITHOUT_ATN_SEQ, base + COMMAND_REG);
782         /* Now an interrupt will be generated which we will catch in out interrupt routine */
783         spin_unlock_irqrestore(&sym53c416_lock, flags);
784         return 0;
785 }
786
787 static int sym53c416_host_reset(Scsi_Cmnd *SCpnt)
788 {
789         int base;
790         int scsi_id = -1;       
791         int i;
792         unsigned long flags;
793
794         spin_lock_irqsave(&sym53c416_lock, flags);
795
796         /* printk("sym53c416_reset\n"); */
797         base = SCpnt->device->host->io_port;
798         /* search scsi_id - fixme, we shouldnt need to iterate for this! */
799         for(i = 0; i < host_index && scsi_id == -1; i++)
800                 if(hosts[i].base == base)
801                         scsi_id = hosts[i].scsi_id;
802         outb(RESET_CHIP, base + COMMAND_REG);
803         outb(NOOP | PIO_MODE, base + COMMAND_REG);
804         outb(RESET_SCSI_BUS, base + COMMAND_REG);
805         sym53c416_init(base, scsi_id);
806
807         spin_unlock_irqrestore(&sym53c416_lock, flags);
808         return SUCCESS;
809 }
810
811 static int sym53c416_release(struct Scsi_Host *shost)
812 {
813         if (shost->irq)
814                 free_irq(shost->irq, shost);
815         if (shost->io_port && shost->n_io_port)
816                 release_region(shost->io_port, shost->n_io_port);
817         return 0;
818 }
819
820 static int sym53c416_bios_param(struct scsi_device *sdev,
821                 struct block_device *dev,
822                 sector_t capacity, int *ip)
823 {
824         int size;
825
826         size = capacity;
827         ip[0] = 64;                             /* heads                        */
828         ip[1] = 32;                             /* sectors                      */
829         if((ip[2] = size >> 11) > 1024)         /* cylinders, test for big disk */
830         {
831                 ip[0] = 255;                    /* heads                        */
832                 ip[1] = 63;                     /* sectors                      */
833                 ip[2] = size / (255 * 63);      /* cylinders                    */
834         }
835         return 0;
836 }
837
838 /* Loadable module support */
839 #ifdef MODULE
840
841 MODULE_AUTHOR("Lieven Willems");
842 MODULE_LICENSE("GPL");
843
844 module_param_array(sym53c416, uint, NULL, 0);
845 module_param_array(sym53c416_1, uint, NULL, 0);
846 module_param_array(sym53c416_2, uint, NULL, 0);
847 module_param_array(sym53c416_3, uint, NULL, 0);
848
849 #endif
850
851 static struct scsi_host_template driver_template = {
852         .proc_name =            "sym53c416",
853         .name =                 "Symbios Logic 53c416",
854         .detect =               sym53c416_detect,
855         .info =                 sym53c416_info, 
856         .queuecommand =         sym53c416_queuecommand,
857         .eh_host_reset_handler =sym53c416_host_reset,
858         .release =              sym53c416_release,
859         .bios_param =           sym53c416_bios_param,
860         .can_queue =            1,
861         .this_id =              SYM53C416_SCSI_ID,
862         .sg_tablesize =         32,
863         .cmd_per_lun =          1,
864         .unchecked_isa_dma =    1,
865         .use_clustering =       ENABLE_CLUSTERING,
866 };
867 #include "scsi_module.c"