[SCSI] megaraid_sas: Fix FastPath I/O to work on degraded raid 1
[linux-2.6.git] / 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@lxorguk.ukuu.org.uk> : 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];
191 static unsigned int sym53c416_base_1[2];
192 static unsigned int sym53c416_base_2[2];
193 static unsigned int sym53c416_base_3[2];
194
195 #endif
196
197 #define MAXHOSTS 4
198
199 #define SG_ADDRESS(buffer)     ((char *) sg_virt((buffer)))
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 = dev->io_port;
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         spin_lock_irqsave(dev->host_lock,flags);
339         status_reg = inb(base + STATUS_REG);
340         pio_int_reg = inb(base + PIO_INT_REG);
341         int_reg = inb(base + INT_REG);
342         spin_unlock_irqrestore(dev->host_lock, flags);
343
344         /* First, we handle error conditions */
345         if(int_reg & SCI)         /* SCSI Reset */
346         {
347                 printk(KERN_DEBUG "sym53c416: Reset received\n");
348                 current_command->SCp.phase = idle;
349                 current_command->result = DID_RESET << 16;
350                 spin_lock_irqsave(dev->host_lock, flags);
351                 current_command->scsi_done(current_command);
352                 spin_unlock_irqrestore(dev->host_lock, flags);
353                 goto out;
354         }
355         if(int_reg & ILCMD)       /* Illegal Command */
356         {
357                 printk(KERN_WARNING "sym53c416: Illegal Command: 0x%02x.\n", inb(base + COMMAND_REG));
358                 current_command->SCp.phase = idle;
359                 current_command->result = DID_ERROR << 16;
360                 spin_lock_irqsave(dev->host_lock, flags);
361                 current_command->scsi_done(current_command);
362                 spin_unlock_irqrestore(dev->host_lock, flags);
363                 goto out;
364         }
365         if(status_reg & GE)         /* Gross Error */
366         {
367                 printk(KERN_WARNING "sym53c416: Controller reports gross error.\n");
368                 current_command->SCp.phase = idle;
369                 current_command->result = DID_ERROR << 16;
370                 spin_lock_irqsave(dev->host_lock, flags);
371                 current_command->scsi_done(current_command);
372                 spin_unlock_irqrestore(dev->host_lock, flags);
373                 goto out;
374         }
375         if(status_reg & PE)         /* Parity Error */
376         {
377                 printk(KERN_WARNING "sym53c416:SCSI parity error.\n");
378                 current_command->SCp.phase = idle;
379                 current_command->result = DID_PARITY << 16;
380                 spin_lock_irqsave(dev->host_lock, flags);
381                 current_command->scsi_done(current_command);
382                 spin_unlock_irqrestore(dev->host_lock, flags);
383                 goto out;
384         }
385         if(pio_int_reg & (CE | OUE))
386         {
387                 printk(KERN_WARNING "sym53c416: PIO interrupt error.\n");
388                 current_command->SCp.phase = idle;
389                 current_command->result = DID_ERROR << 16;
390                 spin_lock_irqsave(dev->host_lock, flags);
391                 current_command->scsi_done(current_command);
392                 spin_unlock_irqrestore(dev->host_lock, flags);
393                 goto out;
394         }
395         if(int_reg & DIS)           /* Disconnect */
396         {
397                 if(current_command->SCp.phase != message_in)
398                         current_command->result = DID_NO_CONNECT << 16;
399                 else
400                         current_command->result = (current_command->SCp.Status & 0xFF) | ((current_command->SCp.Message & 0xFF) << 8) | (DID_OK << 16);
401                 current_command->SCp.phase = idle;
402                 spin_lock_irqsave(dev->host_lock, flags);
403                 current_command->scsi_done(current_command);
404                 spin_unlock_irqrestore(dev->host_lock, flags);
405                 goto out;
406         }
407         /* Now we handle SCSI phases         */
408
409         switch(status_reg & PHBITS)       /* Filter SCSI phase out of status reg */
410         {
411                 case PHASE_DATA_OUT:
412                 {
413                         if(int_reg & BS)
414                         {
415                                 current_command->SCp.phase = data_out;
416                                 outb(FLUSH_FIFO, base + COMMAND_REG);
417                                 sym53c416_set_transfer_counter(base,
418                                                                scsi_bufflen(current_command));
419                                 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
420
421                                 scsi_for_each_sg(current_command,
422                                                  sg, scsi_sg_count(current_command), i) {
423                                         tot_trans += sym53c416_write(base,
424                                                                      SG_ADDRESS(sg),
425                                                                      sg->length);
426                                 }
427                                 if(tot_trans < current_command->underflow)
428                                         printk(KERN_WARNING "sym53c416: Underflow, wrote %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
429                         }
430                         break;
431                 }
432
433                 case PHASE_DATA_IN:
434                 {
435                         if(int_reg & BS)
436                         {
437                                 current_command->SCp.phase = data_in;
438                                 outb(FLUSH_FIFO, base + COMMAND_REG);
439                                 sym53c416_set_transfer_counter(base,
440                                                                scsi_bufflen(current_command));
441
442                                 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
443
444                                 scsi_for_each_sg(current_command,
445                                                  sg, scsi_sg_count(current_command), i) {
446                                         tot_trans += sym53c416_read(base,
447                                                                     SG_ADDRESS(sg),
448                                                                     sg->length);
449                                 }
450                                 if(tot_trans < current_command->underflow)
451                                         printk(KERN_WARNING "sym53c416: Underflow, read %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
452                         }
453                         break;
454                 }
455
456                 case PHASE_COMMAND:
457                 {
458                         current_command->SCp.phase = command_ph;
459                         printk(KERN_ERR "sym53c416: Unknown interrupt in command phase.\n");
460                         break;
461                 }
462
463                 case PHASE_STATUS:
464                 {
465                         current_command->SCp.phase = status_ph;
466                         outb(FLUSH_FIFO, base + COMMAND_REG);
467                         outb(INIT_COMM_COMPLETE_SEQ, base + COMMAND_REG);
468                         break;
469                 }
470                 
471                 case PHASE_RESERVED_1:
472                 case PHASE_RESERVED_2:
473                 {
474                         printk(KERN_ERR "sym53c416: Reserved phase occurred.\n");
475                         break;
476                 }
477
478                 case PHASE_MESSAGE_OUT:
479                 {
480                         current_command->SCp.phase = message_out;
481                         outb(SET_ATN, base + COMMAND_REG);
482                         outb(MSG_ACCEPTED, base + COMMAND_REG);
483                         break;
484                 }
485
486                 case PHASE_MESSAGE_IN:
487                 {
488                         current_command->SCp.phase = message_in;
489                         current_command->SCp.Status = inb(base + SCSI_FIFO);
490                         current_command->SCp.Message = inb(base + SCSI_FIFO);
491                         if(current_command->SCp.Message == SAVE_POINTERS || current_command->SCp.Message == DISCONNECT)
492                                 outb(SET_ATN, base + COMMAND_REG);
493                         outb(MSG_ACCEPTED, base + COMMAND_REG);
494                         break;
495                 }
496         }
497 out:
498         return IRQ_HANDLED;
499 }
500
501 static void sym53c416_init(int base, int scsi_id)
502 {
503         outb(RESET_CHIP, base + COMMAND_REG);
504         outb(NOOP, base + COMMAND_REG);
505         outb(0x99, base + TOM); /* Time out of 250 ms */
506         outb(0x05, base + STP);
507         outb(0x00, base + SYNC_OFFSET);
508         outb(EPC | scsi_id, base + CONF_REG_1);
509         outb(FE | SCSI2 | TBPA, base + CONF_REG_2);
510         outb(IDMRC | QTE | CDB10 | FSCSI | FCLK, base + CONF_REG_3);
511         outb(0x83 | EAN, base + CONF_REG_4);
512         outb(IE | WSE0, base + CONF_REG_5);
513         outb(0, base + FEATURE_EN);
514 }
515
516 static int sym53c416_probeirq(int base, int scsi_id)
517 {
518         int irq, irqs;
519         unsigned long i;
520
521         /* Clear interrupt register */
522         inb(base + INT_REG);
523         /* Start probing for irq's */
524         irqs = probe_irq_on();
525         /* Reinit chip */
526         sym53c416_init(base, scsi_id);
527         /* Cause interrupt */
528         outb(NOOP, base + COMMAND_REG);
529         outb(ILLEGAL, base + COMMAND_REG);
530         outb(0x07, base + DEST_BUS_ID);
531         outb(0x00, base + DEST_BUS_ID);
532         /* Wait for interrupt to occur */
533         i = jiffies + 20;
534         while(time_before(jiffies, i) && !(inb(base + STATUS_REG) & SCI))
535                 barrier();
536         if(time_before_eq(i, jiffies))  /* timed out */
537                 return 0;
538         /* Get occurred irq */
539         irq = probe_irq_off(irqs);
540         sym53c416_init(base, scsi_id);
541         return irq;
542 }
543
544 /* Setup: sym53c416=base,irq */
545 void sym53c416_setup(char *str, int *ints)
546 {
547         int i;
548
549         if(host_index >= MAXHOSTS)
550         {
551                 printk(KERN_WARNING "sym53c416: Too many hosts defined\n");
552                 return;
553         }
554         if(ints[0] < 1 || ints[0] > 2)
555         {
556                 printk(KERN_ERR "sym53c416: Wrong number of parameters:\n");
557                 printk(KERN_ERR "sym53c416: usage: sym53c416=<base>[,<irq>]\n");
558                 return;
559         }
560         for(i = 0; i < host_index && i >= 0; i++)
561                 if(hosts[i].base == ints[1])
562                         i = -2;
563         if(i >= 0)
564         {
565                 hosts[host_index].base = ints[1];
566                 hosts[host_index].irq = (ints[0] == 2)? ints[2] : 0;
567                 host_index++;
568         }
569 }
570
571 static int sym53c416_test(int base)
572 {
573         outb(RESET_CHIP, base + COMMAND_REG);
574         outb(NOOP, base + COMMAND_REG);
575         if(inb(base + COMMAND_REG) != NOOP)
576                 return 0;
577         if(!inb(base + TC_HIGH) || inb(base + TC_HIGH) == 0xFF)
578                 return 0;
579         if((inb(base + PIO_INT_REG) & (FULL | EMPTY | CE | OUE | FIE | EIE)) != EMPTY)
580                 return 0;
581         return 1;
582 }
583
584
585 static struct isapnp_device_id id_table[] __devinitdata = {
586         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
587                 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4161), 0 },
588         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
589                 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4163), 0 },
590         {       ISAPNP_DEVICE_SINGLE_END }
591 };
592
593 MODULE_DEVICE_TABLE(isapnp, id_table);
594
595 static void sym53c416_probe(void)
596 {
597         int *base = probeaddrs;
598         int ints[2];
599
600         ints[0] = 1;
601         for(; *base; base++) {
602                 if (request_region(*base, IO_RANGE, ID)) {
603                         if (sym53c416_test(*base)) {
604                                 ints[1] = *base;
605                                 sym53c416_setup(NULL, ints);
606                         }
607                         release_region(*base, IO_RANGE);
608                 }
609         }
610 }
611
612 int __init sym53c416_detect(struct scsi_host_template *tpnt)
613 {
614         unsigned long flags;
615         struct Scsi_Host * shpnt = NULL;
616         int i;
617         int count;
618         struct pnp_dev *idev = NULL;
619         
620 #ifdef MODULE
621         int ints[3];
622
623         ints[0] = 2;
624         if(sym53c416_base[0])
625         {
626                 ints[1] = sym53c416_base[0];
627                 ints[2] = sym53c416_base[1];
628                 sym53c416_setup(NULL, ints);
629         }
630         if(sym53c416_base_1[0])
631         {
632                 ints[1] = sym53c416_base_1[0];
633                 ints[2] = sym53c416_base_1[1];
634                 sym53c416_setup(NULL, ints);
635         }
636         if(sym53c416_base_2[0])
637         {
638                 ints[1] = sym53c416_base_2[0];
639                 ints[2] = sym53c416_base_2[1];
640                 sym53c416_setup(NULL, ints);
641         }
642         if(sym53c416_base_3[0])
643         {
644                 ints[1] = sym53c416_base_3[0];
645                 ints[2] = sym53c416_base_3[1];
646                 sym53c416_setup(NULL, ints);
647         }
648 #endif
649         printk(KERN_INFO "sym53c416.c: %s\n", VERSION_STRING);
650
651         for (i=0; id_table[i].vendor != 0; i++) {
652                 while((idev=pnp_find_dev(NULL, id_table[i].vendor,
653                                         id_table[i].function, idev))!=NULL)
654                 {
655                         int i[3];
656
657                         if(pnp_device_attach(idev)<0)
658                         {
659                                 printk(KERN_WARNING "sym53c416: unable to attach PnP device.\n");
660                                 continue;
661                         }
662                         if(pnp_activate_dev(idev) < 0)
663                         {
664                                 printk(KERN_WARNING "sym53c416: unable to activate PnP device.\n");
665                                 pnp_device_detach(idev);
666                                 continue;
667                         
668                         }
669
670                         i[0] = 2;
671                         i[1] = pnp_port_start(idev, 0);
672                         i[2] = pnp_irq(idev, 0);
673
674                         printk(KERN_INFO "sym53c416: ISAPnP card found and configured at 0x%X, IRQ %d.\n",
675                                 i[1], i[2]);
676                         sym53c416_setup(NULL, i);
677                 }
678         }
679         sym53c416_probe();
680
681         /* Now we register and set up each host adapter found... */
682         for(count = 0, i = 0; i < host_index; i++) {
683                 if (!request_region(hosts[i].base, IO_RANGE, ID))
684                         continue;
685                 if (!sym53c416_test(hosts[i].base)) {
686                         printk(KERN_WARNING "No sym53c416 found at address 0x%03x\n", hosts[i].base);
687                         goto fail_release_region;
688                 }
689
690                 /* We don't have an irq yet, so we should probe for one */
691                 if (!hosts[i].irq)
692                         hosts[i].irq = sym53c416_probeirq(hosts[i].base, hosts[i].scsi_id);
693                 if (!hosts[i].irq)
694                         goto fail_release_region;
695         
696                 shpnt = scsi_register(tpnt, 0);
697                 if (!shpnt)
698                         goto fail_release_region;
699                 /* Request for specified IRQ */
700                 if (request_irq(hosts[i].irq, sym53c416_intr_handle, 0, ID, shpnt))
701                         goto fail_free_host;
702
703                 spin_lock_irqsave(&sym53c416_lock, flags);
704                 shpnt->unique_id = hosts[i].base;
705                 shpnt->io_port = hosts[i].base;
706                 shpnt->n_io_port = IO_RANGE;
707                 shpnt->irq = hosts[i].irq;
708                 shpnt->this_id = hosts[i].scsi_id;
709                 sym53c416_init(hosts[i].base, hosts[i].scsi_id);
710                 count++;
711                 spin_unlock_irqrestore(&sym53c416_lock, flags);
712                 continue;
713
714  fail_free_host:
715                 scsi_unregister(shpnt);
716  fail_release_region:
717                 release_region(hosts[i].base, IO_RANGE);
718         }
719         return count;
720 }
721
722 const char *sym53c416_info(struct Scsi_Host *SChost)
723 {
724         int i;
725         int base = SChost->io_port;
726         int irq = SChost->irq;
727         int scsi_id = 0;
728         int rev = inb(base + TC_HIGH);
729
730         for(i = 0; i < host_index; i++)
731                 if(hosts[i].base == base)
732                         scsi_id = hosts[i].scsi_id;
733         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");
734         return info;
735 }
736
737 static int sym53c416_queuecommand_lck(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
738 {
739         int base;
740         unsigned long flags = 0;
741         int i;
742
743         /* Store base register as we can have more than one controller in the system */
744         base = SCpnt->device->host->io_port;
745         current_command = SCpnt;                  /* set current command                */
746         current_command->scsi_done = done;        /* set ptr to done function           */
747         current_command->SCp.phase = command_ph;  /* currect phase is the command phase */
748         current_command->SCp.Status = 0;
749         current_command->SCp.Message = 0;
750
751         spin_lock_irqsave(&sym53c416_lock, flags);
752         outb(scmd_id(SCpnt), base + DEST_BUS_ID); /* Set scsi id target        */
753         outb(FLUSH_FIFO, base + COMMAND_REG);    /* Flush SCSI and PIO FIFO's */
754         /* Write SCSI command into the SCSI fifo */
755         for(i = 0; i < SCpnt->cmd_len; i++)
756                 outb(SCpnt->cmnd[i], base + SCSI_FIFO);
757         /* Start selection sequence */
758         outb(SEL_WITHOUT_ATN_SEQ, base + COMMAND_REG);
759         /* Now an interrupt will be generated which we will catch in out interrupt routine */
760         spin_unlock_irqrestore(&sym53c416_lock, flags);
761         return 0;
762 }
763
764 DEF_SCSI_QCMD(sym53c416_queuecommand)
765
766 static int sym53c416_host_reset(Scsi_Cmnd *SCpnt)
767 {
768         int base;
769         int scsi_id = -1;       
770         int i;
771         unsigned long flags;
772
773         spin_lock_irqsave(&sym53c416_lock, flags);
774
775         /* printk("sym53c416_reset\n"); */
776         base = SCpnt->device->host->io_port;
777         /* search scsi_id - fixme, we shouldn't need to iterate for this! */
778         for(i = 0; i < host_index && scsi_id == -1; i++)
779                 if(hosts[i].base == base)
780                         scsi_id = hosts[i].scsi_id;
781         outb(RESET_CHIP, base + COMMAND_REG);
782         outb(NOOP | PIO_MODE, base + COMMAND_REG);
783         outb(RESET_SCSI_BUS, base + COMMAND_REG);
784         sym53c416_init(base, scsi_id);
785
786         spin_unlock_irqrestore(&sym53c416_lock, flags);
787         return SUCCESS;
788 }
789
790 static int sym53c416_release(struct Scsi_Host *shost)
791 {
792         if (shost->irq)
793                 free_irq(shost->irq, shost);
794         if (shost->io_port && shost->n_io_port)
795                 release_region(shost->io_port, shost->n_io_port);
796         return 0;
797 }
798
799 static int sym53c416_bios_param(struct scsi_device *sdev,
800                 struct block_device *dev,
801                 sector_t capacity, int *ip)
802 {
803         int size;
804
805         size = capacity;
806         ip[0] = 64;                             /* heads                        */
807         ip[1] = 32;                             /* sectors                      */
808         if((ip[2] = size >> 11) > 1024)         /* cylinders, test for big disk */
809         {
810                 ip[0] = 255;                    /* heads                        */
811                 ip[1] = 63;                     /* sectors                      */
812                 ip[2] = size / (255 * 63);      /* cylinders                    */
813         }
814         return 0;
815 }
816
817 /* Loadable module support */
818 #ifdef MODULE
819
820 MODULE_AUTHOR("Lieven Willems");
821 MODULE_LICENSE("GPL");
822
823 module_param_array(sym53c416, uint, NULL, 0);
824 module_param_array(sym53c416_1, uint, NULL, 0);
825 module_param_array(sym53c416_2, uint, NULL, 0);
826 module_param_array(sym53c416_3, uint, NULL, 0);
827
828 #endif
829
830 static struct scsi_host_template driver_template = {
831         .proc_name =            "sym53c416",
832         .name =                 "Symbios Logic 53c416",
833         .detect =               sym53c416_detect,
834         .info =                 sym53c416_info, 
835         .queuecommand =         sym53c416_queuecommand,
836         .eh_host_reset_handler =sym53c416_host_reset,
837         .release =              sym53c416_release,
838         .bios_param =           sym53c416_bios_param,
839         .can_queue =            1,
840         .this_id =              SYM53C416_SCSI_ID,
841         .sg_tablesize =         32,
842         .cmd_per_lun =          1,
843         .unchecked_isa_dma =    1,
844         .use_clustering =       ENABLE_CLUSTERING,
845 };
846 #include "scsi_module.c"