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-rw-r--r--drivers/scsi/mac_esp.c751
1 files changed, 0 insertions, 751 deletions
diff --git a/drivers/scsi/mac_esp.c b/drivers/scsi/mac_esp.c
deleted file mode 100644
index bcb49021b7e2..000000000000
--- a/drivers/scsi/mac_esp.c
+++ /dev/null
@@ -1,751 +0,0 @@
1/*
2 * 68k mac 53c9[46] scsi driver
3 *
4 * copyright (c) 1998, David Weis weisd3458@uni.edu
5 *
6 * debugging on Quadra 800 and 660AV Michael Schmitz, Dave Kilzer 7/98
7 *
8 * based loosely on cyber_esp.c
9 */
10
11/* these are unused for now */
12#define myreadl(addr) (*(volatile unsigned int *) (addr))
13#define mywritel(b, addr) ((*(volatile unsigned int *) (addr)) = (b))
14
15
16#include <linux/kernel.h>
17#include <linux/delay.h>
18#include <linux/types.h>
19#include <linux/ctype.h>
20#include <linux/string.h>
21#include <linux/slab.h>
22#include <linux/blkdev.h>
23#include <linux/proc_fs.h>
24#include <linux/stat.h>
25#include <linux/init.h>
26#include <linux/interrupt.h>
27
28#include "scsi.h"
29#include <scsi/scsi_host.h>
30#include "NCR53C9x.h"
31
32#include <asm/io.h>
33
34#include <asm/setup.h>
35#include <asm/irq.h>
36#include <asm/macints.h>
37#include <asm/machw.h>
38#include <asm/mac_via.h>
39
40#include <asm/pgtable.h>
41
42#include <asm/macintosh.h>
43
44/* #define DEBUG_MAC_ESP */
45
46extern void esp_handle(struct NCR_ESP *esp);
47extern void mac_esp_intr(int irq, void *dev_id);
48
49static int dma_bytes_sent(struct NCR_ESP * esp, int fifo_count);
50static int dma_can_transfer(struct NCR_ESP * esp, Scsi_Cmnd *sp);
51static void dma_dump_state(struct NCR_ESP * esp);
52static void dma_init_read(struct NCR_ESP * esp, char * vaddress, int length);
53static void dma_init_write(struct NCR_ESP * esp, char * vaddress, int length);
54static void dma_ints_off(struct NCR_ESP * esp);
55static void dma_ints_on(struct NCR_ESP * esp);
56static int dma_irq_p(struct NCR_ESP * esp);
57static int dma_irq_p_quick(struct NCR_ESP * esp);
58static void dma_led_off(struct NCR_ESP * esp);
59static void dma_led_on(struct NCR_ESP *esp);
60static int dma_ports_p(struct NCR_ESP *esp);
61static void dma_setup(struct NCR_ESP * esp, __u32 addr, int count, int write);
62static void dma_setup_quick(struct NCR_ESP * esp, __u32 addr, int count, int write);
63
64static int esp_dafb_dma_irq_p(struct NCR_ESP * espdev);
65static int esp_iosb_dma_irq_p(struct NCR_ESP * espdev);
66
67static volatile unsigned char cmd_buffer[16];
68 /* This is where all commands are put
69 * before they are transferred to the ESP chip
70 * via PIO.
71 */
72
73static int esp_initialized = 0;
74
75static int setup_num_esps = -1;
76static int setup_disconnect = -1;
77static int setup_nosync = -1;
78static int setup_can_queue = -1;
79static int setup_cmd_per_lun = -1;
80static int setup_sg_tablesize = -1;
81#ifdef SUPPORT_TAGS
82static int setup_use_tagged_queuing = -1;
83#endif
84static int setup_hostid = -1;
85
86/*
87 * Experimental ESP inthandler; check macints.c to make sure dev_id is
88 * set up properly!
89 */
90
91void mac_esp_intr(int irq, void *dev_id)
92{
93 struct NCR_ESP *esp = (struct NCR_ESP *) dev_id;
94 int irq_p = 0;
95
96 /* Handle the one ESP interrupt showing at this IRQ level. */
97 if(((esp)->irq & 0xff) == irq) {
98 /*
99 * Debug ..
100 */
101 irq_p = esp->dma_irq_p(esp);
102 printk("mac_esp: irq_p %x current %p disconnected %p\n",
103 irq_p, esp->current_SC, esp->disconnected_SC);
104
105 /*
106 * Mac: if we're here, it's an ESP interrupt for sure!
107 */
108 if((esp->current_SC || esp->disconnected_SC)) {
109 esp->dma_ints_off(esp);
110
111 ESPIRQ(("I%d(", esp->esp_id));
112 esp_handle(esp);
113 ESPIRQ((")"));
114
115 esp->dma_ints_on(esp);
116 }
117 }
118}
119
120/*
121 * Debug hooks; use for playing with the interrupt flag testing and interrupt
122 * acknowledge on the various machines
123 */
124
125void scsi_esp_polled(int irq, void *dev_id)
126{
127 if (esp_initialized == 0)
128 return;
129
130 mac_esp_intr(irq, dev_id);
131}
132
133void fake_intr(int irq, void *dev_id)
134{
135#ifdef DEBUG_MAC_ESP
136 printk("mac_esp: got irq\n");
137#endif
138
139 mac_esp_intr(irq, dev_id);
140}
141
142irqreturn_t fake_drq(int irq, void *dev_id)
143{
144 printk("mac_esp: got drq\n");
145 return IRQ_HANDLED;
146}
147
148#define DRIVER_SETUP
149
150/*
151 * Function : mac_esp_setup(char *str)
152 *
153 * Purpose : booter command line initialization of the overrides array,
154 *
155 * Inputs : str - parameters, separated by commas.
156 *
157 * Currently unused in the new driver; need to add settable parameters to the
158 * detect function.
159 *
160 */
161
162static int __init mac_esp_setup(char *str) {
163#ifdef DRIVER_SETUP
164 /* Format of mac53c9x parameter is:
165 * mac53c9x=<num_esps>,<disconnect>,<nosync>,<can_queue>,<cmd_per_lun>,<sg_tablesize>,<hostid>,<use_tags>
166 * Negative values mean don't change.
167 */
168
169 char *this_opt;
170 long opt;
171
172 this_opt = strsep (&str, ",");
173 if(this_opt) {
174 opt = simple_strtol( this_opt, NULL, 0 );
175
176 if (opt >= 0 && opt <= 2)
177 setup_num_esps = opt;
178 else if (opt > 2)
179 printk( "mac_esp_setup: invalid number of hosts %ld !\n", opt );
180
181 this_opt = strsep (&str, ",");
182 }
183 if(this_opt) {
184 opt = simple_strtol( this_opt, NULL, 0 );
185
186 if (opt > 0)
187 setup_disconnect = opt;
188
189 this_opt = strsep (&str, ",");
190 }
191 if(this_opt) {
192 opt = simple_strtol( this_opt, NULL, 0 );
193
194 if (opt >= 0)
195 setup_nosync = opt;
196
197 this_opt = strsep (&str, ",");
198 }
199 if(this_opt) {
200 opt = simple_strtol( this_opt, NULL, 0 );
201
202 if (opt > 0)
203 setup_can_queue = opt;
204
205 this_opt = strsep (&str, ",");
206 }
207 if(this_opt) {
208 opt = simple_strtol( this_opt, NULL, 0 );
209
210 if (opt > 0)
211 setup_cmd_per_lun = opt;
212
213 this_opt = strsep (&str, ",");
214 }
215 if(this_opt) {
216 opt = simple_strtol( this_opt, NULL, 0 );
217
218 if (opt >= 0) {
219 setup_sg_tablesize = opt;
220 /* Must be <= SG_ALL (255) */
221 if (setup_sg_tablesize > SG_ALL)
222 setup_sg_tablesize = SG_ALL;
223 }
224
225 this_opt = strsep (&str, ",");
226 }
227 if(this_opt) {
228 opt = simple_strtol( this_opt, NULL, 0 );
229
230 /* Must be between 0 and 7 */
231 if (opt >= 0 && opt <= 7)
232 setup_hostid = opt;
233 else if (opt > 7)
234 printk( "mac_esp_setup: invalid host ID %ld !\n", opt);
235
236 this_opt = strsep (&str, ",");
237 }
238#ifdef SUPPORT_TAGS
239 if(this_opt) {
240 opt = simple_strtol( this_opt, NULL, 0 );
241 if (opt >= 0)
242 setup_use_tagged_queuing = !!opt;
243 }
244#endif
245#endif
246 return 1;
247}
248
249__setup("mac53c9x=", mac_esp_setup);
250
251
252/*
253 * ESP address 'detection'
254 */
255
256unsigned long get_base(int chip_num)
257{
258 /*
259 * using the chip_num and mac model, figure out where the
260 * chips are mapped
261 */
262
263 unsigned long io_base = 0x50f00000;
264 unsigned int second_offset = 0x402;
265 unsigned long scsi_loc = 0;
266
267 switch (macintosh_config->scsi_type) {
268
269 /* 950, 900, 700 */
270 case MAC_SCSI_QUADRA2:
271 scsi_loc = io_base + 0xf000 + ((chip_num == 0) ? 0 : second_offset);
272 break;
273
274 /* av's */
275 case MAC_SCSI_QUADRA3:
276 scsi_loc = io_base + 0x18000 + ((chip_num == 0) ? 0 : second_offset);
277 break;
278
279 /* most quadra/centris models are like this */
280 case MAC_SCSI_QUADRA:
281 scsi_loc = io_base + 0x10000;
282 break;
283
284 default:
285 printk("mac_esp: get_base: hit default!\n");
286 scsi_loc = io_base + 0x10000;
287 break;
288
289 } /* switch */
290
291 printk("mac_esp: io base at 0x%lx\n", scsi_loc);
292
293 return scsi_loc;
294}
295
296/*
297 * Model dependent ESP setup
298 */
299
300int mac_esp_detect(struct scsi_host_template * tpnt)
301{
302 int quick = 0;
303 int chipnum, chipspresent = 0;
304#if 0
305 unsigned long timeout;
306#endif
307
308 if (esp_initialized > 0)
309 return -ENODEV;
310
311 /* what do we have in this machine... */
312 if (MACHW_PRESENT(MAC_SCSI_96)) {
313 chipspresent ++;
314 }
315
316 if (MACHW_PRESENT(MAC_SCSI_96_2)) {
317 chipspresent ++;
318 }
319
320 /* number of ESPs present ? */
321 if (setup_num_esps >= 0) {
322 if (chipspresent >= setup_num_esps)
323 chipspresent = setup_num_esps;
324 else
325 printk("mac_esp_detect: num_hosts detected %d setup %d \n",
326 chipspresent, setup_num_esps);
327 }
328
329 /* TODO: add disconnect / nosync flags */
330
331 /* setup variables */
332 tpnt->can_queue =
333 (setup_can_queue > 0) ? setup_can_queue : 7;
334 tpnt->cmd_per_lun =
335 (setup_cmd_per_lun > 0) ? setup_cmd_per_lun : 1;
336 tpnt->sg_tablesize =
337 (setup_sg_tablesize >= 0) ? setup_sg_tablesize : SG_ALL;
338
339 if (setup_hostid >= 0)
340 tpnt->this_id = setup_hostid;
341 else {
342 /* use 7 as default */
343 tpnt->this_id = 7;
344 }
345
346#ifdef SUPPORT_TAGS
347 if (setup_use_tagged_queuing < 0)
348 setup_use_tagged_queuing = DEFAULT_USE_TAGGED_QUEUING;
349#endif
350
351 for (chipnum = 0; chipnum < chipspresent; chipnum ++) {
352 struct NCR_ESP * esp;
353
354 esp = esp_allocate(tpnt, NULL, 0);
355 esp->eregs = (struct ESP_regs *) get_base(chipnum);
356
357 esp->dma_irq_p = &esp_dafb_dma_irq_p;
358 if (chipnum == 0) {
359
360 if (macintosh_config->scsi_type == MAC_SCSI_QUADRA) {
361 /* most machines except those below :-) */
362 quick = 1;
363 esp->dma_irq_p = &esp_iosb_dma_irq_p;
364 } else if (macintosh_config->scsi_type == MAC_SCSI_QUADRA3) {
365 /* mostly av's */
366 quick = 0;
367 } else {
368 /* q950, 900, 700 */
369 quick = 1;
370 out_be32(0xf9800024, 0x1d1);
371 esp->dregs = (void *) 0xf9800024;
372 }
373
374 } else { /* chipnum */
375
376 quick = 1;
377 out_be32(0xf9800028, 0x1d1);
378 esp->dregs = (void *) 0xf9800028;
379
380 } /* chipnum == 0 */
381
382 /* use pio for command bytes; pio for message/data: TBI */
383 esp->do_pio_cmds = 1;
384
385 /* Set the command buffer */
386 esp->esp_command = (volatile unsigned char*) cmd_buffer;
387 esp->esp_command_dvma = (__u32) cmd_buffer;
388
389 /* various functions */
390 esp->dma_bytes_sent = &dma_bytes_sent;
391 esp->dma_can_transfer = &dma_can_transfer;
392 esp->dma_dump_state = &dma_dump_state;
393 esp->dma_init_read = NULL;
394 esp->dma_init_write = NULL;
395 esp->dma_ints_off = &dma_ints_off;
396 esp->dma_ints_on = &dma_ints_on;
397
398 esp->dma_ports_p = &dma_ports_p;
399
400
401 /* Optional functions */
402 esp->dma_barrier = NULL;
403 esp->dma_drain = NULL;
404 esp->dma_invalidate = NULL;
405 esp->dma_irq_entry = NULL;
406 esp->dma_irq_exit = NULL;
407 esp->dma_led_on = NULL;
408 esp->dma_led_off = NULL;
409 esp->dma_poll = NULL;
410 esp->dma_reset = NULL;
411
412 /* SCSI chip speed */
413 /* below esp->cfreq = 40000000; */
414
415
416 if (quick) {
417 /* 'quick' means there's handshake glue logic like in the 5380 case */
418 esp->dma_setup = &dma_setup_quick;
419 } else {
420 esp->dma_setup = &dma_setup;
421 }
422
423 if (chipnum == 0) {
424
425 esp->irq = IRQ_MAC_SCSI;
426
427 request_irq(IRQ_MAC_SCSI, esp_intr, 0, "Mac ESP SCSI", esp->ehost);
428#if 0 /* conflicts with IOP ADB */
429 request_irq(IRQ_MAC_SCSIDRQ, fake_drq, 0, "Mac ESP DRQ", esp->ehost);
430#endif
431
432 if (macintosh_config->scsi_type == MAC_SCSI_QUADRA) {
433 esp->cfreq = 16500000;
434 } else {
435 esp->cfreq = 25000000;
436 }
437
438
439 } else { /* chipnum == 1 */
440
441 esp->irq = IRQ_MAC_SCSIDRQ;
442#if 0 /* conflicts with IOP ADB */
443 request_irq(IRQ_MAC_SCSIDRQ, esp_intr, 0, "Mac ESP SCSI 2", esp->ehost);
444#endif
445
446 esp->cfreq = 25000000;
447
448 }
449
450 if (quick) {
451 printk("esp: using quick version\n");
452 }
453
454 printk("esp: addr at 0x%p\n", esp->eregs);
455
456 esp->scsi_id = 7;
457 esp->diff = 0;
458
459 esp_initialize(esp);
460
461 } /* for chipnum */
462
463 if (chipspresent)
464 printk("\nmac_esp: %d esp controllers found\n", chipspresent);
465
466 esp_initialized = chipspresent;
467
468 return chipspresent;
469}
470
471static int mac_esp_release(struct Scsi_Host *shost)
472{
473 if (shost->irq)
474 free_irq(shost->irq, NULL);
475 if (shost->io_port && shost->n_io_port)
476 release_region(shost->io_port, shost->n_io_port);
477 scsi_unregister(shost);
478 return 0;
479}
480
481/*
482 * I've been wondering what this is supposed to do, for some time. Talking
483 * to Allen Briggs: These machines have an extra register someplace where the
484 * DRQ pin of the ESP can be monitored. That isn't useful for determining
485 * anything else (such as reselect interrupt or other magic) though.
486 * Maybe make the semantics should be changed like
487 * if (esp->current_SC)
488 * ... check DRQ flag ...
489 * else
490 * ... disconnected, check pending VIA interrupt ...
491 *
492 * There's a problem with using the dabf flag or mac_irq_pending() here: both
493 * seem to return 1 even though no interrupt is currently pending, resulting
494 * in esp_exec_cmd() holding off the next command, and possibly infinite loops
495 * in esp_intr().
496 * Short term fix: just use esp_status & ESP_STAT_INTR here, as long as we
497 * use simple PIO. The DRQ status will be important when implementing pseudo
498 * DMA mode (set up ESP transfer count, return, do a batch of bytes in PIO or
499 * 'hardware handshake' mode upon DRQ).
500 * If you plan on changing this (i.e. to save the esp_status register access in
501 * favor of a VIA register access or a shadow register for the IFR), make sure
502 * to try a debug version of this first to monitor what registers would be a good
503 * indicator of the ESP interrupt.
504 */
505
506static int esp_dafb_dma_irq_p(struct NCR_ESP * esp)
507{
508 unsigned int ret;
509 int sreg = esp_read(esp->eregs->esp_status);
510
511#ifdef DEBUG_MAC_ESP
512 printk("mac_esp: esp_dafb_dma_irq_p dafb %d irq %d\n",
513 readl(esp->dregs), mac_irq_pending(IRQ_MAC_SCSI));
514#endif
515
516 sreg &= ESP_STAT_INTR;
517
518 /*
519 * maybe working; this is essentially what's used for iosb_dma_irq_p
520 */
521 if (sreg)
522 return 1;
523 else
524 return 0;
525
526 /*
527 * didn't work ...
528 */
529#if 0
530 if (esp->current_SC)
531 ret = readl(esp->dregs) & 0x200;
532 else if (esp->disconnected_SC)
533 ret = 1; /* sreg ?? */
534 else
535 ret = mac_irq_pending(IRQ_MAC_SCSI);
536
537 return(ret);
538#endif
539
540}
541
542/*
543 * See above: testing mac_irq_pending always returned 8 (SCSI IRQ) regardless
544 * of the actual ESP status.
545 */
546
547static int esp_iosb_dma_irq_p(struct NCR_ESP * esp)
548{
549 int ret = mac_irq_pending(IRQ_MAC_SCSI) || mac_irq_pending(IRQ_MAC_SCSIDRQ);
550 int sreg = esp_read(esp->eregs->esp_status);
551
552#ifdef DEBUG_MAC_ESP
553 printk("mac_esp: dma_irq_p drq %d irq %d sreg %x curr %p disc %p\n",
554 mac_irq_pending(IRQ_MAC_SCSIDRQ), mac_irq_pending(IRQ_MAC_SCSI),
555 sreg, esp->current_SC, esp->disconnected_SC);
556#endif
557
558 sreg &= ESP_STAT_INTR;
559
560 if (sreg)
561 return (sreg);
562 else
563 return 0;
564}
565
566/*
567 * This seems to be OK for PIO at least ... usually 0 after PIO.
568 */
569
570static int dma_bytes_sent(struct NCR_ESP * esp, int fifo_count)
571{
572
573#ifdef DEBUG_MAC_ESP
574 printk("mac_esp: dma bytes sent = %x\n", fifo_count);
575#endif
576
577 return fifo_count;
578}
579
580/*
581 * dma_can_transfer is used to switch between DMA and PIO, if DMA (pseudo)
582 * is ever implemented. Returning 0 here will use PIO.
583 */
584
585static int dma_can_transfer(struct NCR_ESP * esp, Scsi_Cmnd * sp)
586{
587 unsigned long sz = sp->SCp.this_residual;
588#if 0 /* no DMA yet; make conditional */
589 if (sz > 0x10000000) {
590 sz = 0x10000000;
591 }
592 printk("mac_esp: dma can transfer = 0lx%x\n", sz);
593#else
594
595#ifdef DEBUG_MAC_ESP
596 printk("mac_esp: pio to transfer = %ld\n", sz);
597#endif
598
599 sz = 0;
600#endif
601 return sz;
602}
603
604/*
605 * Not yet ...
606 */
607
608static void dma_dump_state(struct NCR_ESP * esp)
609{
610#ifdef DEBUG_MAC_ESP
611 printk("mac_esp: dma_dump_state: called\n");
612#endif
613#if 0
614 ESPLOG(("esp%d: dma -- cond_reg<%02x>\n",
615 esp->esp_id, ((struct mac_dma_registers *)
616 (esp->dregs))->cond_reg));
617#endif
618}
619
620/*
621 * DMA setup: should be used to set up the ESP transfer count for pseudo
622 * DMA transfers; need a DRQ transfer function to do the actual transfer
623 */
624
625static void dma_init_read(struct NCR_ESP * esp, char * vaddress, int length)
626{
627 printk("mac_esp: dma_init_read\n");
628}
629
630
631static void dma_init_write(struct NCR_ESP * esp, char * vaddress, int length)
632{
633 printk("mac_esp: dma_init_write\n");
634}
635
636
637static void dma_ints_off(struct NCR_ESP * esp)
638{
639 disable_irq(esp->irq);
640}
641
642
643static void dma_ints_on(struct NCR_ESP * esp)
644{
645 enable_irq(esp->irq);
646}
647
648/*
649 * generic dma_irq_p(), unused
650 */
651
652static int dma_irq_p(struct NCR_ESP * esp)
653{
654 int i = esp_read(esp->eregs->esp_status);
655
656#ifdef DEBUG_MAC_ESP
657 printk("mac_esp: dma_irq_p status %d\n", i);
658#endif
659
660 return (i & ESP_STAT_INTR);
661}
662
663static int dma_irq_p_quick(struct NCR_ESP * esp)
664{
665 /*
666 * Copied from iosb_dma_irq_p()
667 */
668 int ret = mac_irq_pending(IRQ_MAC_SCSI) || mac_irq_pending(IRQ_MAC_SCSIDRQ);
669 int sreg = esp_read(esp->eregs->esp_status);
670
671#ifdef DEBUG_MAC_ESP
672 printk("mac_esp: dma_irq_p drq %d irq %d sreg %x curr %p disc %p\n",
673 mac_irq_pending(IRQ_MAC_SCSIDRQ), mac_irq_pending(IRQ_MAC_SCSI),
674 sreg, esp->current_SC, esp->disconnected_SC);
675#endif
676
677 sreg &= ESP_STAT_INTR;
678
679 if (sreg)
680 return (sreg);
681 else
682 return 0;
683
684}
685
686static void dma_led_off(struct NCR_ESP * esp)
687{
688#ifdef DEBUG_MAC_ESP
689 printk("mac_esp: dma_led_off: called\n");
690#endif
691}
692
693
694static void dma_led_on(struct NCR_ESP * esp)
695{
696#ifdef DEBUG_MAC_ESP
697 printk("mac_esp: dma_led_on: called\n");
698#endif
699}
700
701
702static int dma_ports_p(struct NCR_ESP * esp)
703{
704 return 0;
705}
706
707
708static void dma_setup(struct NCR_ESP * esp, __u32 addr, int count, int write)
709{
710
711#ifdef DEBUG_MAC_ESP
712 printk("mac_esp: dma_setup\n");
713#endif
714
715 if (write) {
716 dma_init_read(esp, (char *) addr, count);
717 } else {
718 dma_init_write(esp, (char *) addr, count);
719 }
720}
721
722
723static void dma_setup_quick(struct NCR_ESP * esp, __u32 addr, int count, int write)
724{
725#ifdef DEBUG_MAC_ESP
726 printk("mac_esp: dma_setup_quick\n");
727#endif
728}
729
730static struct scsi_host_template driver_template = {
731 .proc_name = "mac_esp",
732 .name = "Mac 53C9x SCSI",
733 .detect = mac_esp_detect,
734 .slave_alloc = esp_slave_alloc,
735 .slave_destroy = esp_slave_destroy,
736 .release = mac_esp_release,
737 .info = esp_info,
738 .queuecommand = esp_queue,
739 .eh_abort_handler = esp_abort,
740 .eh_bus_reset_handler = esp_reset,
741 .can_queue = 7,
742 .this_id = 7,
743 .sg_tablesize = SG_ALL,
744 .cmd_per_lun = 1,
745 .use_clustering = DISABLE_CLUSTERING
746};
747
748
749#include "scsi_module.c"
750
751MODULE_LICENSE("GPL");
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