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Linux/drivers/scsi/pcmcia/sym53c500_cs.c

  1 /*
  2 *  sym53c500_cs.c       Bob Tracy (rct@frus.com)
  3 *
  4 *  A rewrite of the pcmcia-cs add-on driver for newer (circa 1997)
  5 *  New Media Bus Toaster PCMCIA SCSI cards using the Symbios Logic
  6 *  53c500 controller: intended for use with 2.6 and later kernels.
  7 *  The pcmcia-cs add-on version of this driver is not supported
  8 *  beyond 2.4.  It consisted of three files with history/copyright
  9 *  information as follows:
 10 *
 11 *  SYM53C500.h
 12 *       Bob Tracy (rct@frus.com)
 13 *       Original by Tom Corner (tcorner@via.at).
 14 *       Adapted from NCR53c406a.h which is Copyrighted (C) 1994
 15 *       Normunds Saumanis (normunds@rx.tech.swh.lv)
 16 *
 17 *  SYM53C500.c
 18 *       Bob Tracy (rct@frus.com)
 19 *       Original driver by Tom Corner (tcorner@via.at) was adapted
 20 *       from NCR53c406a.c which is Copyrighted (C) 1994, 1995, 1996 
 21 *       Normunds Saumanis (normunds@fi.ibm.com)
 22 *
 23 *  sym53c500.c
 24 *       Bob Tracy (rct@frus.com)
 25 *       Original by Tom Corner (tcorner@via.at) was adapted from a
 26 *       driver for the Qlogic SCSI card written by
 27 *       David Hinds (dhinds@allegro.stanford.edu).
 28 * 
 29 *  This program is free software; you can redistribute it and/or modify it
 30 *  under the terms of the GNU General Public License as published by the
 31 *  Free Software Foundation; either version 2, or (at your option) any
 32 *  later version.
 33 *
 34 *  This program is distributed in the hope that it will be useful, but
 35 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 36 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 37 *  General Public License for more details.
 38 */
 39 
 40 #define SYM53C500_DEBUG 0
 41 #define VERBOSE_SYM53C500_DEBUG 0
 42 
 43 /*
 44 *  Set this to 0 if you encounter kernel lockups while transferring 
 45 *  data in PIO mode.  Note this can be changed via "sysfs".
 46 */
 47 #define USE_FAST_PIO 1
 48 
 49 /* =============== End of user configurable parameters ============== */
 50 
 51 #include <linux/module.h>
 52 #include <linux/moduleparam.h>
 53 #include <linux/errno.h>
 54 #include <linux/init.h>
 55 #include <linux/interrupt.h>
 56 #include <linux/kernel.h>
 57 #include <linux/slab.h>
 58 #include <linux/string.h>
 59 #include <linux/ioport.h>
 60 #include <linux/blkdev.h>
 61 #include <linux/spinlock.h>
 62 #include <linux/bitops.h>
 63 
 64 #include <asm/io.h>
 65 #include <asm/dma.h>
 66 #include <asm/irq.h>
 67 
 68 #include <scsi/scsi_ioctl.h>
 69 #include <scsi/scsi_cmnd.h>
 70 #include <scsi/scsi_device.h>
 71 #include <scsi/scsi.h>
 72 #include <scsi/scsi_host.h>
 73 
 74 #include <pcmcia/cistpl.h>
 75 #include <pcmcia/ds.h>
 76 #include <pcmcia/ciscode.h>
 77 
 78 
 79 /* ================================================================== */
 80 
 81 #define SYNC_MODE 0             /* Synchronous transfer mode */
 82 
 83 /* Default configuration */
 84 #define C1_IMG   0x07           /* ID=7 */
 85 #define C2_IMG   0x48           /* FE SCSI2 */
 86 #define C3_IMG   0x20           /* CDB */
 87 #define C4_IMG   0x04           /* ANE */
 88 #define C5_IMG   0xa4           /* ? changed from b6= AA PI SIE POL */
 89 #define C7_IMG   0x80           /* added for SYM53C500 t. corner */
 90 
 91 /* Hardware Registers: offsets from io_port (base) */
 92 
 93 /* Control Register Set 0 */
 94 #define TC_LSB          0x00            /* transfer counter lsb */
 95 #define TC_MSB          0x01            /* transfer counter msb */
 96 #define SCSI_FIFO       0x02            /* scsi fifo register */
 97 #define CMD_REG         0x03            /* command register */
 98 #define STAT_REG        0x04            /* status register */
 99 #define DEST_ID         0x04            /* selection/reselection bus id */
100 #define INT_REG         0x05            /* interrupt status register */
101 #define SRTIMOUT        0x05            /* select/reselect timeout reg */
102 #define SEQ_REG         0x06            /* sequence step register */
103 #define SYNCPRD         0x06            /* synchronous transfer period */
104 #define FIFO_FLAGS      0x07            /* indicates # of bytes in fifo */
105 #define SYNCOFF         0x07            /* synchronous offset register */
106 #define CONFIG1         0x08            /* configuration register */
107 #define CLKCONV         0x09            /* clock conversion register */
108 /* #define TESTREG      0x0A */         /* test mode register */
109 #define CONFIG2         0x0B            /* configuration 2 register */
110 #define CONFIG3         0x0C            /* configuration 3 register */
111 #define CONFIG4         0x0D            /* configuration 4 register */
112 #define TC_HIGH         0x0E            /* transfer counter high */
113 /* #define FIFO_BOTTOM  0x0F */         /* reserve FIFO byte register */
114 
115 /* Control Register Set 1 */
116 /* #define JUMPER_SENSE 0x00 */         /* jumper sense port reg (r/w) */
117 /* #define SRAM_PTR     0x01 */         /* SRAM address pointer reg (r/w) */
118 /* #define SRAM_DATA    0x02 */         /* SRAM data register (r/w) */
119 #define PIO_FIFO        0x04            /* PIO FIFO registers (r/w) */
120 /* #define PIO_FIFO1    0x05 */         /*  */
121 /* #define PIO_FIFO2    0x06 */         /*  */
122 /* #define PIO_FIFO3    0x07 */         /*  */
123 #define PIO_STATUS      0x08            /* PIO status (r/w) */
124 /* #define ATA_CMD      0x09 */         /* ATA command/status reg (r/w) */
125 /* #define ATA_ERR      0x0A */         /* ATA features/error reg (r/w) */
126 #define PIO_FLAG        0x0B            /* PIO flag interrupt enable (r/w) */
127 #define CONFIG5         0x09            /* configuration 5 register */
128 /* #define SIGNATURE    0x0E */         /* signature register (r) */
129 /* #define CONFIG6      0x0F */         /* configuration 6 register (r) */
130 #define CONFIG7         0x0d
131 
132 /* select register set 0 */
133 #define REG0(x)         (outb(C4_IMG, (x) + CONFIG4))
134 /* select register set 1 */
135 #define REG1(x)         outb(C7_IMG, (x) + CONFIG7); outb(C5_IMG, (x) + CONFIG5)
136 
137 #if SYM53C500_DEBUG
138 #define DEB(x) x
139 #else
140 #define DEB(x)
141 #endif
142 
143 #if VERBOSE_SYM53C500_DEBUG
144 #define VDEB(x) x
145 #else
146 #define VDEB(x)
147 #endif
148 
149 #define LOAD_DMA_COUNT(x, count) \
150   outb(count & 0xff, (x) + TC_LSB); \
151   outb((count >> 8) & 0xff, (x) + TC_MSB); \
152   outb((count >> 16) & 0xff, (x) + TC_HIGH);
153 
154 /* Chip commands */
155 #define DMA_OP               0x80
156 
157 #define SCSI_NOP             0x00
158 #define FLUSH_FIFO           0x01
159 #define CHIP_RESET           0x02
160 #define SCSI_RESET           0x03
161 #define RESELECT             0x40
162 #define SELECT_NO_ATN        0x41
163 #define SELECT_ATN           0x42
164 #define SELECT_ATN_STOP      0x43
165 #define ENABLE_SEL           0x44
166 #define DISABLE_SEL          0x45
167 #define SELECT_ATN3          0x46
168 #define RESELECT3            0x47
169 #define TRANSFER_INFO        0x10
170 #define INIT_CMD_COMPLETE    0x11
171 #define MSG_ACCEPT           0x12
172 #define TRANSFER_PAD         0x18
173 #define SET_ATN              0x1a
174 #define RESET_ATN            0x1b
175 #define SEND_MSG             0x20
176 #define SEND_STATUS          0x21
177 #define SEND_DATA            0x22
178 #define DISCONN_SEQ          0x23
179 #define TERMINATE_SEQ        0x24
180 #define TARG_CMD_COMPLETE    0x25
181 #define DISCONN              0x27
182 #define RECV_MSG             0x28
183 #define RECV_CMD             0x29
184 #define RECV_DATA            0x2a
185 #define RECV_CMD_SEQ         0x2b
186 #define TARGET_ABORT_DMA     0x04
187 
188 /* ================================================================== */
189 
190 struct scsi_info_t {
191         struct pcmcia_device    *p_dev;
192         struct Scsi_Host *host;
193         unsigned short manf_id;
194 };
195 
196 /*
197 *  Repository for per-instance host data.
198 */
199 struct sym53c500_data {
200         struct scsi_cmnd *current_SC;
201         int fast_pio;
202 };
203 
204 enum Phase {
205     idle,
206     data_out,
207     data_in,
208     command_ph,
209     status_ph,
210     message_out,
211     message_in
212 };
213 
214 /* ================================================================== */
215 
216 static void
217 chip_init(int io_port)
218 {
219         REG1(io_port);
220         outb(0x01, io_port + PIO_STATUS);
221         outb(0x00, io_port + PIO_FLAG);
222 
223         outb(C4_IMG, io_port + CONFIG4);        /* REG0(io_port); */
224         outb(C3_IMG, io_port + CONFIG3);
225         outb(C2_IMG, io_port + CONFIG2);
226         outb(C1_IMG, io_port + CONFIG1);
227 
228         outb(0x05, io_port + CLKCONV);  /* clock conversion factor */
229         outb(0x9C, io_port + SRTIMOUT); /* Selection timeout */
230         outb(0x05, io_port + SYNCPRD);  /* Synchronous transfer period */
231         outb(SYNC_MODE, io_port + SYNCOFF);     /* synchronous mode */  
232 }
233 
234 static void
235 SYM53C500_int_host_reset(int io_port)
236 {
237         outb(C4_IMG, io_port + CONFIG4);        /* REG0(io_port); */
238         outb(CHIP_RESET, io_port + CMD_REG);
239         outb(SCSI_NOP, io_port + CMD_REG);      /* required after reset */
240         outb(SCSI_RESET, io_port + CMD_REG);
241         chip_init(io_port);
242 }
243 
244 static __inline__ int
245 SYM53C500_pio_read(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
246 {
247         int i;
248         int len;        /* current scsi fifo size */
249 
250         REG1(base);
251         while (reqlen) {
252                 i = inb(base + PIO_STATUS);
253                 /* VDEB(printk("pio_status=%x\n", i)); */
254                 if (i & 0x80) 
255                         return 0;
256 
257                 switch (i & 0x1e) {
258                 default:
259                 case 0x10:      /* fifo empty */
260                         len = 0;
261                         break;
262                 case 0x0:
263                         len = 1;
264                         break; 
265                 case 0x8:       /* fifo 1/3 full */
266                         len = 42;
267                         break;
268                 case 0xc:       /* fifo 2/3 full */
269                         len = 84;
270                         break;
271                 case 0xe:       /* fifo full */
272                         len = 128;
273                         break;
274                 }
275 
276                 if ((i & 0x40) && len == 0) { /* fifo empty and interrupt occurred */
277                         return 0;
278                 }
279 
280                 if (len) {
281                         if (len > reqlen) 
282                                 len = reqlen;
283 
284                         if (fast_pio && len > 3) {
285                                 insl(base + PIO_FIFO, request, len >> 2);
286                                 request += len & 0xfc; 
287                                 reqlen -= len & 0xfc; 
288                         } else {
289                                 while (len--) {
290                                         *request++ = inb(base + PIO_FIFO);
291                                         reqlen--;
292                                 }
293                         } 
294                 }
295         }
296         return 0;
297 }
298 
299 static __inline__ int
300 SYM53C500_pio_write(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
301 {
302         int i = 0;
303         int len;        /* current scsi fifo size */
304 
305         REG1(base);
306         while (reqlen && !(i & 0x40)) {
307                 i = inb(base + PIO_STATUS);
308                 /* VDEB(printk("pio_status=%x\n", i)); */
309                 if (i & 0x80)   /* error */
310                         return 0;
311 
312                 switch (i & 0x1e) {
313                 case 0x10:
314                         len = 128;
315                         break;
316                 case 0x0:
317                         len = 84;
318                         break;
319                 case 0x8:
320                         len = 42;
321                         break;
322                 case 0xc:
323                         len = 1;
324                         break;
325                 default:
326                 case 0xe:
327                         len = 0;
328                         break;
329                 }
330 
331                 if (len) {
332                         if (len > reqlen)
333                                 len = reqlen;
334 
335                         if (fast_pio && len > 3) {
336                                 outsl(base + PIO_FIFO, request, len >> 2);
337                                 request += len & 0xfc;
338                                 reqlen -= len & 0xfc;
339                         } else {
340                                 while (len--) {
341                                         outb(*request++, base + PIO_FIFO);
342                                         reqlen--;
343                                 }
344                         }
345                 }
346         }
347         return 0;
348 }
349 
350 static irqreturn_t
351 SYM53C500_intr(int irq, void *dev_id)
352 {
353         unsigned long flags;
354         struct Scsi_Host *dev = dev_id;
355         DEB(unsigned char fifo_size;)
356         DEB(unsigned char seq_reg;)
357         unsigned char status, int_reg;
358         unsigned char pio_status;
359         int port_base = dev->io_port;
360         struct sym53c500_data *data =
361             (struct sym53c500_data *)dev->hostdata;
362         struct scsi_cmnd *curSC = data->current_SC;
363         int fast_pio = data->fast_pio;
364 
365         spin_lock_irqsave(dev->host_lock, flags);
366 
367         VDEB(printk("SYM53C500_intr called\n"));
368 
369         REG1(port_base);
370         pio_status = inb(port_base + PIO_STATUS);
371         REG0(port_base);
372         status = inb(port_base + STAT_REG);
373         DEB(seq_reg = inb(port_base + SEQ_REG));
374         int_reg = inb(port_base + INT_REG);
375         DEB(fifo_size = inb(port_base + FIFO_FLAGS) & 0x1f);
376 
377 #if SYM53C500_DEBUG
378         printk("status=%02x, seq_reg=%02x, int_reg=%02x, fifo_size=%02x", 
379             status, seq_reg, int_reg, fifo_size);
380         printk(", pio=%02x\n", pio_status);
381 #endif /* SYM53C500_DEBUG */
382 
383         if (int_reg & 0x80) {   /* SCSI reset intr */
384                 DEB(printk("SYM53C500: reset intr received\n"));
385                 curSC->result = DID_RESET << 16;
386                 goto idle_out;
387         }
388 
389         if (pio_status & 0x80) {
390                 printk("SYM53C500: Warning: PIO error!\n");
391                 curSC->result = DID_ERROR << 16;
392                 goto idle_out;
393         }
394 
395         if (status & 0x20) {            /* Parity error */
396                 printk("SYM53C500: Warning: parity error!\n");
397                 curSC->result = DID_PARITY << 16;
398                 goto idle_out;
399         }
400 
401         if (status & 0x40) {            /* Gross error */
402                 printk("SYM53C500: Warning: gross error!\n");
403                 curSC->result = DID_ERROR << 16;
404                 goto idle_out;
405         }
406 
407         if (int_reg & 0x20) {           /* Disconnect */
408                 DEB(printk("SYM53C500: disconnect intr received\n"));
409                 if (curSC->SCp.phase != message_in) {   /* Unexpected disconnect */
410                         curSC->result = DID_NO_CONNECT << 16;
411                 } else {        /* Command complete, return status and message */
412                         curSC->result = (curSC->SCp.Status & 0xff)
413                             | ((curSC->SCp.Message & 0xff) << 8) | (DID_OK << 16);
414                 }
415                 goto idle_out;
416         }
417 
418         switch (status & 0x07) {        /* scsi phase */
419         case 0x00:                      /* DATA-OUT */
420                 if (int_reg & 0x10) {   /* Target requesting info transfer */
421                         struct scatterlist *sg;
422                         int i;
423 
424                         curSC->SCp.phase = data_out;
425                         VDEB(printk("SYM53C500: Data-Out phase\n"));
426                         outb(FLUSH_FIFO, port_base + CMD_REG);
427                         LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
428                         outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
429 
430                         scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
431                                 SYM53C500_pio_write(fast_pio, port_base,
432                                     sg_virt(sg), sg->length);
433                         }
434                         REG0(port_base);
435                 }
436                 break;
437 
438         case 0x01:              /* DATA-IN */
439                 if (int_reg & 0x10) {   /* Target requesting info transfer */
440                         struct scatterlist *sg;
441                         int i;
442 
443                         curSC->SCp.phase = data_in;
444                         VDEB(printk("SYM53C500: Data-In phase\n"));
445                         outb(FLUSH_FIFO, port_base + CMD_REG);
446                         LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
447                         outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
448 
449                         scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
450                                 SYM53C500_pio_read(fast_pio, port_base,
451                                         sg_virt(sg), sg->length);
452                         }
453                         REG0(port_base);
454                 }
455                 break;
456 
457         case 0x02:              /* COMMAND */
458                 curSC->SCp.phase = command_ph;
459                 printk("SYM53C500: Warning: Unknown interrupt occurred in command phase!\n");
460                 break;
461 
462         case 0x03:              /* STATUS */
463                 curSC->SCp.phase = status_ph;
464                 VDEB(printk("SYM53C500: Status phase\n"));
465                 outb(FLUSH_FIFO, port_base + CMD_REG);
466                 outb(INIT_CMD_COMPLETE, port_base + CMD_REG);
467                 break;
468 
469         case 0x04:              /* Reserved */
470         case 0x05:              /* Reserved */
471                 printk("SYM53C500: WARNING: Reserved phase!!!\n");
472                 break;
473 
474         case 0x06:              /* MESSAGE-OUT */
475                 DEB(printk("SYM53C500: Message-Out phase\n"));
476                 curSC->SCp.phase = message_out;
477                 outb(SET_ATN, port_base + CMD_REG);     /* Reject the message */
478                 outb(MSG_ACCEPT, port_base + CMD_REG);
479                 break;
480 
481         case 0x07:              /* MESSAGE-IN */
482                 VDEB(printk("SYM53C500: Message-In phase\n"));
483                 curSC->SCp.phase = message_in;
484 
485                 curSC->SCp.Status = inb(port_base + SCSI_FIFO);
486                 curSC->SCp.Message = inb(port_base + SCSI_FIFO);
487 
488                 VDEB(printk("SCSI FIFO size=%d\n", inb(port_base + FIFO_FLAGS) & 0x1f));
489                 DEB(printk("Status = %02x  Message = %02x\n", curSC->SCp.Status, curSC->SCp.Message));
490 
491                 if (curSC->SCp.Message == SAVE_POINTERS || curSC->SCp.Message == DISCONNECT) {
492                         outb(SET_ATN, port_base + CMD_REG);     /* Reject message */
493                         DEB(printk("Discarding SAVE_POINTERS message\n"));
494                 }
495                 outb(MSG_ACCEPT, port_base + CMD_REG);
496                 break;
497         }
498 out:
499         spin_unlock_irqrestore(dev->host_lock, flags);
500         return IRQ_HANDLED;
501 
502 idle_out:
503         curSC->SCp.phase = idle;
504         curSC->scsi_done(curSC);
505         goto out;
506 }
507 
508 static void
509 SYM53C500_release(struct pcmcia_device *link)
510 {
511         struct scsi_info_t *info = link->priv;
512         struct Scsi_Host *shost = info->host;
513 
514         dev_dbg(&link->dev, "SYM53C500_release\n");
515 
516         /*
517         *  Do this before releasing/freeing resources.
518         */
519         scsi_remove_host(shost);
520 
521         /*
522         *  Interrupts getting hosed on card removal.  Try
523         *  the following code, mostly from qlogicfas.c.
524         */
525         if (shost->irq)
526                 free_irq(shost->irq, shost);
527         if (shost->io_port && shost->n_io_port)
528                 release_region(shost->io_port, shost->n_io_port);
529 
530         pcmcia_disable_device(link);
531 
532         scsi_host_put(shost);
533 } /* SYM53C500_release */
534 
535 static const char*
536 SYM53C500_info(struct Scsi_Host *SChost)
537 {
538         static char info_msg[256];
539         struct sym53c500_data *data =
540             (struct sym53c500_data *)SChost->hostdata;
541 
542         DEB(printk("SYM53C500_info called\n"));
543         (void)snprintf(info_msg, sizeof(info_msg),
544             "SYM53C500 at 0x%lx, IRQ %d, %s PIO mode.", 
545             SChost->io_port, SChost->irq, data->fast_pio ? "fast" : "slow");
546         return (info_msg);
547 }
548 
549 static int 
550 SYM53C500_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
551 {
552         int i;
553         int port_base = SCpnt->device->host->io_port;
554         struct sym53c500_data *data =
555             (struct sym53c500_data *)SCpnt->device->host->hostdata;
556 
557         VDEB(printk("SYM53C500_queue called\n"));
558 
559         DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%d\n", 
560             SCpnt->cmnd[0], SCpnt->cmd_len, SCpnt->device->id, 
561             SCpnt->device->lun,  scsi_bufflen(SCpnt)));
562 
563         VDEB(for (i = 0; i < SCpnt->cmd_len; i++)
564             printk("cmd[%d]=%02x  ", i, SCpnt->cmnd[i]));
565         VDEB(printk("\n"));
566 
567         data->current_SC = SCpnt;
568         data->current_SC->scsi_done = done;
569         data->current_SC->SCp.phase = command_ph;
570         data->current_SC->SCp.Status = 0;
571         data->current_SC->SCp.Message = 0;
572 
573         /* We are locked here already by the mid layer */
574         REG0(port_base);
575         outb(scmd_id(SCpnt), port_base + DEST_ID);      /* set destination */
576         outb(FLUSH_FIFO, port_base + CMD_REG);  /* reset the fifos */
577 
578         for (i = 0; i < SCpnt->cmd_len; i++) {
579                 outb(SCpnt->cmnd[i], port_base + SCSI_FIFO);
580         }
581         outb(SELECT_NO_ATN, port_base + CMD_REG);
582 
583         return 0;
584 }
585 
586 static DEF_SCSI_QCMD(SYM53C500_queue)
587 
588 static int 
589 SYM53C500_host_reset(struct scsi_cmnd *SCpnt)
590 {
591         int port_base = SCpnt->device->host->io_port;
592 
593         DEB(printk("SYM53C500_host_reset called\n"));
594         spin_lock_irq(SCpnt->device->host->host_lock);
595         SYM53C500_int_host_reset(port_base);
596         spin_unlock_irq(SCpnt->device->host->host_lock);
597 
598         return SUCCESS;
599 }
600 
601 static int 
602 SYM53C500_biosparm(struct scsi_device *disk,
603     struct block_device *dev,
604     sector_t capacity, int *info_array)
605 {
606         int size;
607 
608         DEB(printk("SYM53C500_biosparm called\n"));
609 
610         size = capacity;
611         info_array[0] = 64;             /* heads */
612         info_array[1] = 32;             /* sectors */
613         info_array[2] = size >> 11;     /* cylinders */
614         if (info_array[2] > 1024) {     /* big disk */
615                 info_array[0] = 255;
616                 info_array[1] = 63;
617                 info_array[2] = size / (255 * 63);
618         }
619         return 0;
620 }
621 
622 static ssize_t
623 SYM53C500_show_pio(struct device *dev, struct device_attribute *attr,
624                    char *buf)
625 {
626         struct Scsi_Host *SHp = class_to_shost(dev);
627         struct sym53c500_data *data =
628             (struct sym53c500_data *)SHp->hostdata;
629 
630         return snprintf(buf, 4, "%d\n", data->fast_pio);
631 }
632 
633 static ssize_t
634 SYM53C500_store_pio(struct device *dev, struct device_attribute *attr,
635                     const char *buf, size_t count)
636 {
637         int pio;
638         struct Scsi_Host *SHp = class_to_shost(dev);
639         struct sym53c500_data *data =
640             (struct sym53c500_data *)SHp->hostdata;
641 
642         pio = simple_strtoul(buf, NULL, 0);
643         if (pio == 0 || pio == 1) {
644                 data->fast_pio = pio;
645                 return count;
646         }
647         else
648                 return -EINVAL;
649 }
650 
651 /*
652 *  SCSI HBA device attributes we want to
653 *  make available via sysfs.
654 */
655 static struct device_attribute SYM53C500_pio_attr = {
656         .attr = {
657                 .name = "fast_pio",
658                 .mode = (S_IRUGO | S_IWUSR),
659         },
660         .show = SYM53C500_show_pio,
661         .store = SYM53C500_store_pio,
662 };
663 
664 static struct device_attribute *SYM53C500_shost_attrs[] = {
665         &SYM53C500_pio_attr,
666         NULL,
667 };
668 
669 /*
670 *  scsi_host_template initializer
671 */
672 static struct scsi_host_template sym53c500_driver_template = {
673      .module                    = THIS_MODULE,
674      .name                      = "SYM53C500",
675      .info                      = SYM53C500_info,
676      .queuecommand              = SYM53C500_queue,
677      .eh_host_reset_handler     = SYM53C500_host_reset,
678      .bios_param                = SYM53C500_biosparm,
679      .proc_name                 = "SYM53C500",
680      .can_queue                 = 1,
681      .this_id                   = 7,
682      .sg_tablesize              = 32,
683      .cmd_per_lun               = 1,
684      .use_clustering            = ENABLE_CLUSTERING,
685      .shost_attrs               = SYM53C500_shost_attrs
686 };
687 
688 static int SYM53C500_config_check(struct pcmcia_device *p_dev, void *priv_data)
689 {
690         p_dev->io_lines = 10;
691         p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
692         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
693 
694         if (p_dev->resource[0]->start == 0)
695                 return -ENODEV;
696 
697         return pcmcia_request_io(p_dev);
698 }
699 
700 static int
701 SYM53C500_config(struct pcmcia_device *link)
702 {
703         struct scsi_info_t *info = link->priv;
704         int ret;
705         int irq_level, port_base;
706         struct Scsi_Host *host;
707         struct scsi_host_template *tpnt = &sym53c500_driver_template;
708         struct sym53c500_data *data;
709 
710         dev_dbg(&link->dev, "SYM53C500_config\n");
711 
712         info->manf_id = link->manf_id;
713 
714         ret = pcmcia_loop_config(link, SYM53C500_config_check, NULL);
715         if (ret)
716                 goto failed;
717 
718         if (!link->irq)
719                 goto failed;
720 
721         ret = pcmcia_enable_device(link);
722         if (ret)
723                 goto failed;
724 
725         /*
726         *  That's the trouble with copying liberally from another driver.
727         *  Some things probably aren't relevant, and I suspect this entire
728         *  section dealing with manufacturer IDs can be scrapped.       --rct
729         */
730         if ((info->manf_id == MANFID_MACNICA) ||
731             (info->manf_id == MANFID_PIONEER) ||
732             (info->manf_id == 0x0098)) {
733                 /* set ATAcmd */
734                 outb(0xb4, link->resource[0]->start + 0xd);
735                 outb(0x24, link->resource[0]->start + 0x9);
736                 outb(0x04, link->resource[0]->start + 0xd);
737         }
738 
739         /*
740         *  irq_level == 0 implies tpnt->can_queue == 0, which
741         *  is not supported in 2.6.  Thus, only irq_level > 0
742         *  will be allowed.
743         *
744         *  Possible port_base values are as follows:
745         *
746         *       0x130, 0x230, 0x280, 0x290,
747         *       0x320, 0x330, 0x340, 0x350
748         */
749         port_base = link->resource[0]->start;
750         irq_level = link->irq;
751 
752         DEB(printk("SYM53C500: port_base=0x%x, irq=%d, fast_pio=%d\n",
753             port_base, irq_level, USE_FAST_PIO);)
754 
755         chip_init(port_base);
756 
757         host = scsi_host_alloc(tpnt, sizeof(struct sym53c500_data));
758         if (!host) {
759                 printk("SYM53C500: Unable to register host, giving up.\n");
760                 goto err_release;
761         }
762 
763         data = (struct sym53c500_data *)host->hostdata;
764 
765         if (irq_level > 0) {
766                 if (request_irq(irq_level, SYM53C500_intr, IRQF_SHARED, "SYM53C500", host)) {
767                         printk("SYM53C500: unable to allocate IRQ %d\n", irq_level);
768                         goto err_free_scsi;
769                 }
770                 DEB(printk("SYM53C500: allocated IRQ %d\n", irq_level));
771         } else if (irq_level == 0) {
772                 DEB(printk("SYM53C500: No interrupts detected\n"));
773                 goto err_free_scsi;
774         } else {
775                 DEB(printk("SYM53C500: Shouldn't get here!\n"));
776                 goto err_free_scsi;
777         }
778 
779         host->unique_id = port_base;
780         host->irq = irq_level;
781         host->io_port = port_base;
782         host->n_io_port = 0x10;
783         host->dma_channel = -1;
784 
785         /*
786         *  Note fast_pio is set to USE_FAST_PIO by
787         *  default, but can be changed via "sysfs".
788         */
789         data->fast_pio = USE_FAST_PIO;
790 
791         info->host = host;
792 
793         if (scsi_add_host(host, NULL))
794                 goto err_free_irq;
795 
796         scsi_scan_host(host);
797 
798         return 0;
799 
800 err_free_irq:
801         free_irq(irq_level, host);
802 err_free_scsi:
803         scsi_host_put(host);
804 err_release:
805         release_region(port_base, 0x10);
806         printk(KERN_INFO "sym53c500_cs: no SCSI devices found\n");
807         return -ENODEV;
808 
809 failed:
810         SYM53C500_release(link);
811         return -ENODEV;
812 } /* SYM53C500_config */
813 
814 static int sym53c500_resume(struct pcmcia_device *link)
815 {
816         struct scsi_info_t *info = link->priv;
817 
818         /* See earlier comment about manufacturer IDs. */
819         if ((info->manf_id == MANFID_MACNICA) ||
820             (info->manf_id == MANFID_PIONEER) ||
821             (info->manf_id == 0x0098)) {
822                 outb(0x80, link->resource[0]->start + 0xd);
823                 outb(0x24, link->resource[0]->start + 0x9);
824                 outb(0x04, link->resource[0]->start + 0xd);
825         }
826         /*
827          *  If things don't work after a "resume",
828          *  this is a good place to start looking.
829          */
830         SYM53C500_int_host_reset(link->resource[0]->start);
831 
832         return 0;
833 }
834 
835 static void
836 SYM53C500_detach(struct pcmcia_device *link)
837 {
838         dev_dbg(&link->dev, "SYM53C500_detach\n");
839 
840         SYM53C500_release(link);
841 
842         kfree(link->priv);
843         link->priv = NULL;
844 } /* SYM53C500_detach */
845 
846 static int
847 SYM53C500_probe(struct pcmcia_device *link)
848 {
849         struct scsi_info_t *info;
850 
851         dev_dbg(&link->dev, "SYM53C500_attach()\n");
852 
853         /* Create new SCSI device */
854         info = kzalloc(sizeof(*info), GFP_KERNEL);
855         if (!info)
856                 return -ENOMEM;
857         info->p_dev = link;
858         link->priv = info;
859         link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
860 
861         return SYM53C500_config(link);
862 } /* SYM53C500_attach */
863 
864 MODULE_AUTHOR("Bob Tracy <rct@frus.com>");
865 MODULE_DESCRIPTION("SYM53C500 PCMCIA SCSI driver");
866 MODULE_LICENSE("GPL");
867 
868 static const struct pcmcia_device_id sym53c500_ids[] = {
869         PCMCIA_DEVICE_PROD_ID12("BASICS by New Media Corporation", "SCSI Sym53C500", 0x23c78a9d, 0x0099e7f7),
870         PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "SCSI Bus Toaster Sym53C500", 0x085a850b, 0x45432eb8),
871         PCMCIA_DEVICE_PROD_ID2("SCSI9000", 0x21648f44),
872         PCMCIA_DEVICE_NULL,
873 };
874 MODULE_DEVICE_TABLE(pcmcia, sym53c500_ids);
875 
876 static struct pcmcia_driver sym53c500_cs_driver = {
877         .owner          = THIS_MODULE,
878         .name           = "sym53c500_cs",
879         .probe          = SYM53C500_probe,
880         .remove         = SYM53C500_detach,
881         .id_table       = sym53c500_ids,
882         .resume         = sym53c500_resume,
883 };
884 
885 static int __init
886 init_sym53c500_cs(void)
887 {
888         return pcmcia_register_driver(&sym53c500_cs_driver);
889 }
890 
891 static void __exit
892 exit_sym53c500_cs(void)
893 {
894         pcmcia_unregister_driver(&sym53c500_cs_driver);
895 }
896 
897 module_init(init_sym53c500_cs);
898 module_exit(exit_sym53c500_cs);
899 

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