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11#include <linux/init.h>
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/blkdev.h>
15#include <linux/parport.h>
16#include <linux/workqueue.h>
17#include <linux/delay.h>
18#include <asm/io.h>
19
20#include <scsi/scsi.h>
21#include <scsi/scsi_cmnd.h>
22#include <scsi/scsi_device.h>
23#include <scsi/scsi_host.h>
24
25
26#define IMM_PROBE_SPP 0x0001
27#define IMM_PROBE_PS2 0x0002
28#define IMM_PROBE_ECR 0x0010
29#define IMM_PROBE_EPP17 0x0100
30#define IMM_PROBE_EPP19 0x0200
31
32
33typedef struct {
34 struct pardevice *dev;
35 int base;
36 int base_hi;
37 int mode;
38 struct scsi_cmnd *cur_cmd;
39 struct delayed_work imm_tq;
40 unsigned long jstart;
41 unsigned failed:1;
42 unsigned dp:1;
43 unsigned rd:1;
44 unsigned wanted:1;
45 wait_queue_head_t *waiting;
46 struct Scsi_Host *host;
47 struct list_head list;
48} imm_struct;
49
50static void imm_reset_pulse(unsigned int base);
51static int device_check(imm_struct *dev);
52
53#include "imm.h"
54
55static inline imm_struct *imm_dev(struct Scsi_Host *host)
56{
57 return *(imm_struct **)&host->hostdata;
58}
59
60static DEFINE_SPINLOCK(arbitration_lock);
61
62static void got_it(imm_struct *dev)
63{
64 dev->base = dev->dev->port->base;
65 if (dev->cur_cmd)
66 dev->cur_cmd->SCp.phase = 1;
67 else
68 wake_up(dev->waiting);
69}
70
71static void imm_wakeup(void *ref)
72{
73 imm_struct *dev = (imm_struct *) ref;
74 unsigned long flags;
75
76 spin_lock_irqsave(&arbitration_lock, flags);
77 if (dev->wanted) {
78 parport_claim(dev->dev);
79 got_it(dev);
80 dev->wanted = 0;
81 }
82 spin_unlock_irqrestore(&arbitration_lock, flags);
83}
84
85static int imm_pb_claim(imm_struct *dev)
86{
87 unsigned long flags;
88 int res = 1;
89 spin_lock_irqsave(&arbitration_lock, flags);
90 if (parport_claim(dev->dev) == 0) {
91 got_it(dev);
92 res = 0;
93 }
94 dev->wanted = res;
95 spin_unlock_irqrestore(&arbitration_lock, flags);
96 return res;
97}
98
99static void imm_pb_dismiss(imm_struct *dev)
100{
101 unsigned long flags;
102 int wanted;
103 spin_lock_irqsave(&arbitration_lock, flags);
104 wanted = dev->wanted;
105 dev->wanted = 0;
106 spin_unlock_irqrestore(&arbitration_lock, flags);
107 if (!wanted)
108 parport_release(dev->dev);
109}
110
111static inline void imm_pb_release(imm_struct *dev)
112{
113 parport_release(dev->dev);
114}
115
116
117
118
119
120
121
122
123static inline int imm_proc_write(imm_struct *dev, char *buffer, int length)
124{
125 unsigned long x;
126
127 if ((length > 5) && (strncmp(buffer, "mode=", 5) == 0)) {
128 x = simple_strtoul(buffer + 5, NULL, 0);
129 dev->mode = x;
130 return length;
131 }
132 printk("imm /proc: invalid variable\n");
133 return (-EINVAL);
134}
135
136static int imm_proc_info(struct Scsi_Host *host, char *buffer, char **start,
137 off_t offset, int length, int inout)
138{
139 imm_struct *dev = imm_dev(host);
140 int len = 0;
141
142 if (inout)
143 return imm_proc_write(dev, buffer, length);
144
145 len += sprintf(buffer + len, "Version : %s\n", IMM_VERSION);
146 len +=
147 sprintf(buffer + len, "Parport : %s\n",
148 dev->dev->port->name);
149 len +=
150 sprintf(buffer + len, "Mode : %s\n",
151 IMM_MODE_STRING[dev->mode]);
152
153
154 if (offset > len)
155 return 0;
156
157 *start = buffer + offset;
158 len -= offset;
159 if (len > length)
160 len = length;
161 return len;
162}
163
164#if IMM_DEBUG > 0
165#define imm_fail(x,y) printk("imm: imm_fail(%i) from %s at line %d\n",\
166 y, __func__, __LINE__); imm_fail_func(x,y);
167static inline void
168imm_fail_func(imm_struct *dev, int error_code)
169#else
170static inline void
171imm_fail(imm_struct *dev, int error_code)
172#endif
173{
174
175 if (dev->cur_cmd) {
176 dev->cur_cmd->result = error_code << 16;
177 dev->failed = 1;
178 }
179}
180
181
182
183
184
185
186
187
188static unsigned char imm_wait(imm_struct *dev)
189{
190 int k;
191 unsigned short ppb = dev->base;
192 unsigned char r;
193
194 w_ctr(ppb, 0x0c);
195
196 k = IMM_SPIN_TMO;
197 do {
198 r = r_str(ppb);
199 k--;
200 udelay(1);
201 }
202 while (!(r & 0x80) && (k));
203
204
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219
220
221
222
223 w_ctr(ppb, 0x04);
224 if (k)
225 return (r & 0xb8);
226
227
228 imm_fail(dev, DID_TIME_OUT);
229 printk("imm timeout in imm_wait\n");
230 return 0;
231}
232
233static int imm_negotiate(imm_struct * tmp)
234{
235
236
237
238
239
240
241
242
243
244
245
246
247 unsigned short base = tmp->base;
248 unsigned char a, mode;
249
250 switch (tmp->mode) {
251 case IMM_NIBBLE:
252 mode = 0x00;
253 break;
254 case IMM_PS2:
255 mode = 0x01;
256 break;
257 default:
258 return 0;
259 }
260
261 w_ctr(base, 0x04);
262 udelay(5);
263 w_dtr(base, mode);
264 udelay(100);
265 w_ctr(base, 0x06);
266 udelay(5);
267 a = (r_str(base) & 0x20) ? 0 : 1;
268 udelay(5);
269 w_ctr(base, 0x07);
270 udelay(5);
271 w_ctr(base, 0x06);
272
273 if (a) {
274 printk
275 ("IMM: IEEE1284 negotiate indicates no data available.\n");
276 imm_fail(tmp, DID_ERROR);
277 }
278 return a;
279}
280
281
282
283
284static inline void epp_reset(unsigned short ppb)
285{
286 int i;
287
288 i = r_str(ppb);
289 w_str(ppb, i);
290 w_str(ppb, i & 0xfe);
291}
292
293
294
295
296static inline void ecp_sync(imm_struct *dev)
297{
298 int i, ppb_hi = dev->base_hi;
299
300 if (ppb_hi == 0)
301 return;
302
303 if ((r_ecr(ppb_hi) & 0xe0) == 0x60) {
304 for (i = 0; i < 100; i++) {
305 if (r_ecr(ppb_hi) & 0x01)
306 return;
307 udelay(5);
308 }
309 printk("imm: ECP sync failed as data still present in FIFO.\n");
310 }
311}
312
313static int imm_byte_out(unsigned short base, const char *buffer, int len)
314{
315 int i;
316
317 w_ctr(base, 0x4);
318 for (i = len >> 1; i; i--) {
319 w_dtr(base, *buffer++);
320 w_ctr(base, 0x5);
321 w_dtr(base, *buffer++);
322 w_ctr(base, 0x0);
323 }
324 w_ctr(base, 0x4);
325 return 1;
326}
327
328static int imm_nibble_in(unsigned short base, char *buffer, int len)
329{
330 unsigned char l;
331 int i;
332
333
334
335
336 w_ctr(base, 0x4);
337 for (i = len; i; i--) {
338 w_ctr(base, 0x6);
339 l = (r_str(base) & 0xf0) >> 4;
340 w_ctr(base, 0x5);
341 *buffer++ = (r_str(base) & 0xf0) | l;
342 w_ctr(base, 0x4);
343 }
344 return 1;
345}
346
347static int imm_byte_in(unsigned short base, char *buffer, int len)
348{
349 int i;
350
351
352
353
354 w_ctr(base, 0x4);
355 for (i = len; i; i--) {
356 w_ctr(base, 0x26);
357 *buffer++ = r_dtr(base);
358 w_ctr(base, 0x25);
359 }
360 return 1;
361}
362
363static int imm_out(imm_struct *dev, char *buffer, int len)
364{
365 unsigned short ppb = dev->base;
366 int r = imm_wait(dev);
367
368
369
370
371
372
373 if ((r & 0x18) != 0x08) {
374 imm_fail(dev, DID_ERROR);
375 printk("IMM: returned SCSI status %2x\n", r);
376 return 0;
377 }
378 switch (dev->mode) {
379 case IMM_EPP_32:
380 case IMM_EPP_16:
381 case IMM_EPP_8:
382 epp_reset(ppb);
383 w_ctr(ppb, 0x4);
384#ifdef CONFIG_SCSI_IZIP_EPP16
385 if (!(((long) buffer | len) & 0x01))
386 outsw(ppb + 4, buffer, len >> 1);
387#else
388 if (!(((long) buffer | len) & 0x03))
389 outsl(ppb + 4, buffer, len >> 2);
390#endif
391 else
392 outsb(ppb + 4, buffer, len);
393 w_ctr(ppb, 0xc);
394 r = !(r_str(ppb) & 0x01);
395 w_ctr(ppb, 0xc);
396 ecp_sync(dev);
397 break;
398
399 case IMM_NIBBLE:
400 case IMM_PS2:
401
402 r = imm_byte_out(ppb, buffer, len);
403 break;
404
405 default:
406 printk("IMM: bug in imm_out()\n");
407 r = 0;
408 }
409 return r;
410}
411
412static int imm_in(imm_struct *dev, char *buffer, int len)
413{
414 unsigned short ppb = dev->base;
415 int r = imm_wait(dev);
416
417
418
419
420
421
422 if ((r & 0x18) != 0x18) {
423 imm_fail(dev, DID_ERROR);
424 return 0;
425 }
426 switch (dev->mode) {
427 case IMM_NIBBLE:
428
429 r = imm_nibble_in(ppb, buffer, len);
430 w_ctr(ppb, 0xc);
431 break;
432
433 case IMM_PS2:
434
435 r = imm_byte_in(ppb, buffer, len);
436 w_ctr(ppb, 0xc);
437 break;
438
439 case IMM_EPP_32:
440 case IMM_EPP_16:
441 case IMM_EPP_8:
442 epp_reset(ppb);
443 w_ctr(ppb, 0x24);
444#ifdef CONFIG_SCSI_IZIP_EPP16
445 if (!(((long) buffer | len) & 0x01))
446 insw(ppb + 4, buffer, len >> 1);
447#else
448 if (!(((long) buffer | len) & 0x03))
449 insl(ppb + 4, buffer, len >> 2);
450#endif
451 else
452 insb(ppb + 4, buffer, len);
453 w_ctr(ppb, 0x2c);
454 r = !(r_str(ppb) & 0x01);
455 w_ctr(ppb, 0x2c);
456 ecp_sync(dev);
457 break;
458
459 default:
460 printk("IMM: bug in imm_ins()\n");
461 r = 0;
462 break;
463 }
464 return r;
465}
466
467static int imm_cpp(unsigned short ppb, unsigned char b)
468{
469
470
471
472
473
474 unsigned char s1, s2, s3;
475 w_ctr(ppb, 0x0c);
476 udelay(2);
477 w_dtr(ppb, 0xaa);
478 udelay(10);
479 w_dtr(ppb, 0x55);
480 udelay(10);
481 w_dtr(ppb, 0x00);
482 udelay(10);
483 w_dtr(ppb, 0xff);
484 udelay(10);
485 s1 = r_str(ppb) & 0xb8;
486 w_dtr(ppb, 0x87);
487 udelay(10);
488 s2 = r_str(ppb) & 0xb8;
489 w_dtr(ppb, 0x78);
490 udelay(10);
491 s3 = r_str(ppb) & 0x38;
492
493
494
495
496
497
498
499
500
501
502 w_dtr(ppb, b);
503 udelay(2);
504 w_ctr(ppb, 0x0c);
505 udelay(10);
506 w_ctr(ppb, 0x0d);
507 udelay(2);
508 w_ctr(ppb, 0x0c);
509 udelay(10);
510 w_dtr(ppb, 0xff);
511 udelay(10);
512
513
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515
516
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519
520
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522
523
524
525
526
527
528
529 if ((s1 == 0xb8) && (s2 == 0x18) && (s3 == 0x30))
530 return 1;
531 if ((s1 == 0xb8) && (s2 == 0x18) && (s3 == 0x38))
532 return 0;
533
534 return -1;
535}
536
537static inline int imm_connect(imm_struct *dev, int flag)
538{
539 unsigned short ppb = dev->base;
540
541 imm_cpp(ppb, 0xe0);
542 imm_cpp(ppb, 0x30);
543
544 if ((dev->mode == IMM_EPP_8) ||
545 (dev->mode == IMM_EPP_16) ||
546 (dev->mode == IMM_EPP_32))
547 return imm_cpp(ppb, 0x28);
548 return imm_cpp(ppb, 0xe0);
549}
550
551static void imm_disconnect(imm_struct *dev)
552{
553 imm_cpp(dev->base, 0x30);
554}
555
556static int imm_select(imm_struct *dev, int target)
557{
558 int k;
559 unsigned short ppb = dev->base;
560
561
562
563
564
565 w_ctr(ppb, 0xc);
566
567 k = IMM_SELECT_TMO;
568 do {
569 k--;
570 } while ((r_str(ppb) & 0x08) && (k));
571
572 if (!k)
573 return 0;
574
575
576
577
578 w_ctr(ppb, 0x4);
579 w_dtr(ppb, 0x80 | (1 << target));
580 udelay(1);
581
582
583
584
585 w_ctr(ppb, 0xc);
586 w_ctr(ppb, 0xd);
587
588
589
590
591
592 k = IMM_SELECT_TMO;
593 do {
594 k--;
595 }
596 while (!(r_str(ppb) & 0x08) && (k));
597
598
599
600
601 w_ctr(ppb, 0xc);
602 return (k) ? 1 : 0;
603}
604
605static int imm_init(imm_struct *dev)
606{
607 if (imm_connect(dev, 0) != 1)
608 return -EIO;
609 imm_reset_pulse(dev->base);
610 mdelay(1);
611 imm_disconnect(dev);
612 mdelay(1);
613 return device_check(dev);
614}
615
616static inline int imm_send_command(struct scsi_cmnd *cmd)
617{
618 imm_struct *dev = imm_dev(cmd->device->host);
619 int k;
620
621
622 for (k = 0; k < cmd->cmd_len; k += 2)
623 if (!imm_out(dev, &cmd->cmnd[k], 2))
624 return 0;
625 return 1;
626}
627
628
629
630
631
632
633
634
635
636static int imm_completion(struct scsi_cmnd *cmd)
637{
638
639
640
641
642
643 imm_struct *dev = imm_dev(cmd->device->host);
644 unsigned short ppb = dev->base;
645 unsigned long start_jiffies = jiffies;
646
647 unsigned char r, v;
648 int fast, bulk, status;
649
650 v = cmd->cmnd[0];
651 bulk = ((v == READ_6) ||
652 (v == READ_10) || (v == WRITE_6) || (v == WRITE_10));
653
654
655
656
657
658 w_ctr(ppb, 0x0c);
659 r = (r_str(ppb) & 0xb8);
660
661
662
663
664
665 while (r != (unsigned char) 0xb8) {
666
667
668
669
670 if (time_after(jiffies, start_jiffies + 1))
671 return 0;
672
673
674
675
676
677
678 if (((r & 0x88) != 0x88) || (cmd->SCp.this_residual <= 0)) {
679 imm_fail(dev, DID_ERROR);
680 return -1;
681 }
682
683 if (dev->rd == 0) {
684 fast = (bulk
685 && (cmd->SCp.this_residual >=
686 IMM_BURST_SIZE)) ? IMM_BURST_SIZE : 2;
687 status = imm_out(dev, cmd->SCp.ptr, fast);
688 } else {
689 fast = (bulk
690 && (cmd->SCp.this_residual >=
691 IMM_BURST_SIZE)) ? IMM_BURST_SIZE : 1;
692 status = imm_in(dev, cmd->SCp.ptr, fast);
693 }
694
695 cmd->SCp.ptr += fast;
696 cmd->SCp.this_residual -= fast;
697
698 if (!status) {
699 imm_fail(dev, DID_BUS_BUSY);
700 return -1;
701 }
702 if (cmd->SCp.buffer && !cmd->SCp.this_residual) {
703
704 if (cmd->SCp.buffers_residual--) {
705 cmd->SCp.buffer++;
706 cmd->SCp.this_residual =
707 cmd->SCp.buffer->length;
708 cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
709
710
711
712
713
714 if (cmd->SCp.this_residual & 0x01)
715 cmd->SCp.this_residual++;
716 }
717 }
718
719 w_ctr(ppb, 0x0c);
720 r = (r_str(ppb) & 0xb8);
721
722
723 if (!(r & 0x80))
724 return 0;
725 }
726 return 1;
727}
728
729
730
731
732
733
734static void imm_interrupt(struct work_struct *work)
735{
736 imm_struct *dev = container_of(work, imm_struct, imm_tq.work);
737 struct scsi_cmnd *cmd = dev->cur_cmd;
738 struct Scsi_Host *host = cmd->device->host;
739 unsigned long flags;
740
741 if (imm_engine(dev, cmd)) {
742 schedule_delayed_work(&dev->imm_tq, 1);
743 return;
744 }
745
746#if IMM_DEBUG > 0
747 switch ((cmd->result >> 16) & 0xff) {
748 case DID_OK:
749 break;
750 case DID_NO_CONNECT:
751 printk("imm: no device at SCSI ID %i\n", cmd->device->id);
752 break;
753 case DID_BUS_BUSY:
754 printk("imm: BUS BUSY - EPP timeout detected\n");
755 break;
756 case DID_TIME_OUT:
757 printk("imm: unknown timeout\n");
758 break;
759 case DID_ABORT:
760 printk("imm: told to abort\n");
761 break;
762 case DID_PARITY:
763 printk("imm: parity error (???)\n");
764 break;
765 case DID_ERROR:
766 printk("imm: internal driver error\n");
767 break;
768 case DID_RESET:
769 printk("imm: told to reset device\n");
770 break;
771 case DID_BAD_INTR:
772 printk("imm: bad interrupt (???)\n");
773 break;
774 default:
775 printk("imm: bad return code (%02x)\n",
776 (cmd->result >> 16) & 0xff);
777 }
778#endif
779
780 if (cmd->SCp.phase > 1)
781 imm_disconnect(dev);
782
783 imm_pb_dismiss(dev);
784
785 spin_lock_irqsave(host->host_lock, flags);
786 dev->cur_cmd = NULL;
787 cmd->scsi_done(cmd);
788 spin_unlock_irqrestore(host->host_lock, flags);
789 return;
790}
791
792static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd)
793{
794 unsigned short ppb = dev->base;
795 unsigned char l = 0, h = 0;
796 int retv, x;
797
798
799
800
801 if (dev->failed)
802 return 0;
803
804 switch (cmd->SCp.phase) {
805 case 0:
806 if (time_after(jiffies, dev->jstart + HZ)) {
807
808
809
810
811 imm_fail(dev, DID_BUS_BUSY);
812 return 0;
813 }
814 return 1;
815
816 case 1:
817 imm_connect(dev, CONNECT_EPP_MAYBE);
818 cmd->SCp.phase++;
819
820
821 case 2:
822 if (!imm_select(dev, scmd_id(cmd))) {
823 imm_fail(dev, DID_NO_CONNECT);
824 return 0;
825 }
826 cmd->SCp.phase++;
827
828
829 case 3:
830 w_ctr(ppb, 0x0c);
831 if (!(r_str(ppb) & 0x80))
832 return 1;
833
834 if (!imm_send_command(cmd))
835 return 0;
836 cmd->SCp.phase++;
837
838
839 case 4:
840 if (scsi_bufflen(cmd)) {
841 cmd->SCp.buffer = scsi_sglist(cmd);
842 cmd->SCp.this_residual = cmd->SCp.buffer->length;
843 cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
844 } else {
845 cmd->SCp.buffer = NULL;
846 cmd->SCp.this_residual = 0;
847 cmd->SCp.ptr = NULL;
848 }
849 cmd->SCp.buffers_residual = scsi_sg_count(cmd) - 1;
850 cmd->SCp.phase++;
851 if (cmd->SCp.this_residual & 0x01)
852 cmd->SCp.this_residual++;
853
854 case 5:
855
856 w_ctr(ppb, 0x0c);
857 if (!(r_str(ppb) & 0x80))
858 return 1;
859
860
861 x = (r_str(ppb) & 0xb8);
862 dev->rd = (x & 0x10) ? 1 : 0;
863 dev->dp = (x & 0x20) ? 0 : 1;
864
865 if ((dev->dp) && (dev->rd))
866 if (imm_negotiate(dev))
867 return 0;
868 cmd->SCp.phase++;
869
870
871 case 6:
872
873 w_ctr(ppb, 0x0c);
874 if (!(r_str(ppb) & 0x80))
875 return 1;
876
877 if (dev->dp) {
878 retv = imm_completion(cmd);
879 if (retv == -1)
880 return 0;
881 if (retv == 0)
882 return 1;
883 }
884 cmd->SCp.phase++;
885
886
887 case 7:
888 if ((dev->dp) && (dev->rd)) {
889 if ((dev->mode == IMM_NIBBLE) || (dev->mode == IMM_PS2)) {
890 w_ctr(ppb, 0x4);
891 w_ctr(ppb, 0xc);
892 w_ctr(ppb, 0xe);
893 w_ctr(ppb, 0x4);
894 }
895 }
896 cmd->SCp.phase++;
897
898
899 case 8:
900
901 if (imm_wait(dev) != (unsigned char) 0xb8) {
902 imm_fail(dev, DID_ERROR);
903 return 0;
904 }
905 if (imm_negotiate(dev))
906 return 0;
907 if (imm_in(dev, &l, 1)) {
908
909 if (imm_wait(dev) == (unsigned char) 0xb8)
910 imm_in(dev, &h, 1);
911 cmd->result = (DID_OK << 16) + (l & STATUS_MASK);
912 }
913 if ((dev->mode == IMM_NIBBLE) || (dev->mode == IMM_PS2)) {
914 w_ctr(ppb, 0x4);
915 w_ctr(ppb, 0xc);
916 w_ctr(ppb, 0xe);
917 w_ctr(ppb, 0x4);
918 }
919 return 0;
920 break;
921
922 default:
923 printk("imm: Invalid scsi phase\n");
924 }
925 return 0;
926}
927
928static int imm_queuecommand(struct scsi_cmnd *cmd,
929 void (*done)(struct scsi_cmnd *))
930{
931 imm_struct *dev = imm_dev(cmd->device->host);
932
933 if (dev->cur_cmd) {
934 printk("IMM: bug in imm_queuecommand\n");
935 return 0;
936 }
937 dev->failed = 0;
938 dev->jstart = jiffies;
939 dev->cur_cmd = cmd;
940 cmd->scsi_done = done;
941 cmd->result = DID_ERROR << 16;
942 cmd->SCp.phase = 0;
943
944 schedule_delayed_work(&dev->imm_tq, 0);
945
946 imm_pb_claim(dev);
947
948 return 0;
949}
950
951
952
953
954
955
956
957static int imm_biosparam(struct scsi_device *sdev, struct block_device *dev,
958 sector_t capacity, int ip[])
959{
960 ip[0] = 0x40;
961 ip[1] = 0x20;
962 ip[2] = ((unsigned long) capacity + 1) / (ip[0] * ip[1]);
963 if (ip[2] > 1024) {
964 ip[0] = 0xff;
965 ip[1] = 0x3f;
966 ip[2] = ((unsigned long) capacity + 1) / (ip[0] * ip[1]);
967 }
968 return 0;
969}
970
971static int imm_abort(struct scsi_cmnd *cmd)
972{
973 imm_struct *dev = imm_dev(cmd->device->host);
974
975
976
977
978
979 switch (cmd->SCp.phase) {
980 case 0:
981 case 1:
982 dev->cur_cmd = NULL;
983 return SUCCESS;
984 break;
985 default:
986 return FAILED;
987 break;
988 }
989}
990
991static void imm_reset_pulse(unsigned int base)
992{
993 w_ctr(base, 0x04);
994 w_dtr(base, 0x40);
995 udelay(1);
996 w_ctr(base, 0x0c);
997 w_ctr(base, 0x0d);
998 udelay(50);
999 w_ctr(base, 0x0c);
1000 w_ctr(base, 0x04);
1001}
1002
1003static int imm_reset(struct scsi_cmnd *cmd)
1004{
1005 imm_struct *dev = imm_dev(cmd->device->host);
1006
1007 if (cmd->SCp.phase)
1008 imm_disconnect(dev);
1009 dev->cur_cmd = NULL;
1010
1011 imm_connect(dev, CONNECT_NORMAL);
1012 imm_reset_pulse(dev->base);
1013 mdelay(1);
1014 imm_disconnect(dev);
1015 mdelay(1);
1016 return SUCCESS;
1017}
1018
1019static int device_check(imm_struct *dev)
1020{
1021
1022
1023
1024 static char cmd[6] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
1025 int loop, old_mode, status, k, ppb = dev->base;
1026 unsigned char l;
1027
1028 old_mode = dev->mode;
1029 for (loop = 0; loop < 8; loop++) {
1030
1031 if ((ppb & 0x0007) == 0x0000)
1032 dev->mode = IMM_EPP_32;
1033
1034 second_pass:
1035 imm_connect(dev, CONNECT_EPP_MAYBE);
1036
1037 if (!imm_select(dev, loop)) {
1038 imm_disconnect(dev);
1039 continue;
1040 }
1041 printk("imm: Found device at ID %i, Attempting to use %s\n",
1042 loop, IMM_MODE_STRING[dev->mode]);
1043
1044
1045 status = 1;
1046 w_ctr(ppb, 0x0c);
1047 for (l = 0; (l < 3) && (status); l++)
1048 status = imm_out(dev, &cmd[l << 1], 2);
1049
1050 if (!status) {
1051 imm_disconnect(dev);
1052 imm_connect(dev, CONNECT_EPP_MAYBE);
1053 imm_reset_pulse(dev->base);
1054 udelay(1000);
1055 imm_disconnect(dev);
1056 udelay(1000);
1057 if (dev->mode == IMM_EPP_32) {
1058 dev->mode = old_mode;
1059 goto second_pass;
1060 }
1061 printk("imm: Unable to establish communication\n");
1062 return -EIO;
1063 }
1064 w_ctr(ppb, 0x0c);
1065
1066 k = 1000000;
1067 do {
1068 l = r_str(ppb);
1069 k--;
1070 udelay(1);
1071 } while (!(l & 0x80) && (k));
1072
1073 l &= 0xb8;
1074
1075 if (l != 0xb8) {
1076 imm_disconnect(dev);
1077 imm_connect(dev, CONNECT_EPP_MAYBE);
1078 imm_reset_pulse(dev->base);
1079 udelay(1000);
1080 imm_disconnect(dev);
1081 udelay(1000);
1082 if (dev->mode == IMM_EPP_32) {
1083 dev->mode = old_mode;
1084 goto second_pass;
1085 }
1086 printk
1087 ("imm: Unable to establish communication\n");
1088 return -EIO;
1089 }
1090 imm_disconnect(dev);
1091 printk
1092 ("imm: Communication established at 0x%x with ID %i using %s\n",
1093 ppb, loop, IMM_MODE_STRING[dev->mode]);
1094 imm_connect(dev, CONNECT_EPP_MAYBE);
1095 imm_reset_pulse(dev->base);
1096 udelay(1000);
1097 imm_disconnect(dev);
1098 udelay(1000);
1099 return 0;
1100 }
1101 printk("imm: No devices found\n");
1102 return -ENODEV;
1103}
1104
1105
1106
1107
1108
1109static int imm_adjust_queue(struct scsi_device *device)
1110{
1111 blk_queue_bounce_limit(device->request_queue, BLK_BOUNCE_HIGH);
1112 return 0;
1113}
1114
1115static struct scsi_host_template imm_template = {
1116 .module = THIS_MODULE,
1117 .proc_name = "imm",
1118 .proc_info = imm_proc_info,
1119 .name = "Iomega VPI2 (imm) interface",
1120 .queuecommand = imm_queuecommand,
1121 .eh_abort_handler = imm_abort,
1122 .eh_bus_reset_handler = imm_reset,
1123 .eh_host_reset_handler = imm_reset,
1124 .bios_param = imm_biosparam,
1125 .this_id = 7,
1126 .sg_tablesize = SG_ALL,
1127 .cmd_per_lun = 1,
1128 .use_clustering = ENABLE_CLUSTERING,
1129 .can_queue = 1,
1130 .slave_alloc = imm_adjust_queue,
1131};
1132
1133
1134
1135
1136
1137static LIST_HEAD(imm_hosts);
1138
1139static int __imm_attach(struct parport *pb)
1140{
1141 struct Scsi_Host *host;
1142 imm_struct *dev;
1143 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waiting);
1144 DEFINE_WAIT(wait);
1145 int ports;
1146 int modes, ppb;
1147 int err = -ENOMEM;
1148
1149 init_waitqueue_head(&waiting);
1150
1151 dev = kzalloc(sizeof(imm_struct), GFP_KERNEL);
1152 if (!dev)
1153 return -ENOMEM;
1154
1155
1156 dev->base = -1;
1157 dev->mode = IMM_AUTODETECT;
1158 INIT_LIST_HEAD(&dev->list);
1159
1160 dev->dev = parport_register_device(pb, "imm", NULL, imm_wakeup,
1161 NULL, 0, dev);
1162
1163 if (!dev->dev)
1164 goto out;
1165
1166
1167
1168
1169
1170 err = -EBUSY;
1171 dev->waiting = &waiting;
1172 prepare_to_wait(&waiting, &wait, TASK_UNINTERRUPTIBLE);
1173 if (imm_pb_claim(dev))
1174 schedule_timeout(3 * HZ);
1175 if (dev->wanted) {
1176 printk(KERN_ERR "imm%d: failed to claim parport because "
1177 "a pardevice is owning the port for too long "
1178 "time!\n", pb->number);
1179 imm_pb_dismiss(dev);
1180 dev->waiting = NULL;
1181 finish_wait(&waiting, &wait);
1182 goto out1;
1183 }
1184 dev->waiting = NULL;
1185 finish_wait(&waiting, &wait);
1186 ppb = dev->base = dev->dev->port->base;
1187 dev->base_hi = dev->dev->port->base_hi;
1188 w_ctr(ppb, 0x0c);
1189 modes = dev->dev->port->modes;
1190
1191
1192
1193
1194 dev->mode = IMM_NIBBLE;
1195
1196 if (modes & PARPORT_MODE_TRISTATE)
1197 dev->mode = IMM_PS2;
1198
1199
1200
1201 err = imm_init(dev);
1202
1203 imm_pb_release(dev);
1204
1205 if (err)
1206 goto out1;
1207
1208
1209 if (dev->mode == IMM_NIBBLE || dev->mode == IMM_PS2)
1210 ports = 3;
1211 else
1212 ports = 8;
1213
1214 INIT_DELAYED_WORK(&dev->imm_tq, imm_interrupt);
1215
1216 err = -ENOMEM;
1217 host = scsi_host_alloc(&imm_template, sizeof(imm_struct *));
1218 if (!host)
1219 goto out1;
1220 host->io_port = pb->base;
1221 host->n_io_port = ports;
1222 host->dma_channel = -1;
1223 host->unique_id = pb->number;
1224 *(imm_struct **)&host->hostdata = dev;
1225 dev->host = host;
1226 list_add_tail(&dev->list, &imm_hosts);
1227 err = scsi_add_host(host, NULL);
1228 if (err)
1229 goto out2;
1230 scsi_scan_host(host);
1231 return 0;
1232
1233out2:
1234 list_del_init(&dev->list);
1235 scsi_host_put(host);
1236out1:
1237 parport_unregister_device(dev->dev);
1238out:
1239 kfree(dev);
1240 return err;
1241}
1242
1243static void imm_attach(struct parport *pb)
1244{
1245 __imm_attach(pb);
1246}
1247
1248static void imm_detach(struct parport *pb)
1249{
1250 imm_struct *dev;
1251 list_for_each_entry(dev, &imm_hosts, list) {
1252 if (dev->dev->port == pb) {
1253 list_del_init(&dev->list);
1254 scsi_remove_host(dev->host);
1255 scsi_host_put(dev->host);
1256 parport_unregister_device(dev->dev);
1257 kfree(dev);
1258 break;
1259 }
1260 }
1261}
1262
1263static struct parport_driver imm_driver = {
1264 .name = "imm",
1265 .attach = imm_attach,
1266 .detach = imm_detach,
1267};
1268
1269static int __init imm_driver_init(void)
1270{
1271 printk("imm: Version %s\n", IMM_VERSION);
1272 return parport_register_driver(&imm_driver);
1273}
1274
1275static void __exit imm_driver_exit(void)
1276{
1277 parport_unregister_driver(&imm_driver);
1278}
1279
1280module_init(imm_driver_init);
1281module_exit(imm_driver_exit);
1282
1283MODULE_LICENSE("GPL");
1284