diff options
author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-01-03 13:27:16 -0500 |
---|---|---|
committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-02-07 19:02:42 -0500 |
commit | 642978beb48331db1bafde0262eee33f658cfc39 (patch) | |
tree | 92305bcbd3aabce5d314bb0621ca602979965b42 /drivers/scsi/mac_esp.c | |
parent | da19d2f53269210adfa9aa5a163a9fad8dc63d27 (diff) |
[SCSI] remove m68k NCR53C9x based drivers
These drivers depend on the deprecated NCR53C9X core and need to be converted
to the esp_scsi core.
Acked-by: Boaz Harrosh <bharrosh@panasas.com>
Cc: Linux/m68k <linux-m68k@vger.kernel.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/mac_esp.c')
-rw-r--r-- | drivers/scsi/mac_esp.c | 751 |
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 | |||
46 | extern void esp_handle(struct NCR_ESP *esp); | ||
47 | extern void mac_esp_intr(int irq, void *dev_id); | ||
48 | |||
49 | static int dma_bytes_sent(struct NCR_ESP * esp, int fifo_count); | ||
50 | static int dma_can_transfer(struct NCR_ESP * esp, Scsi_Cmnd *sp); | ||
51 | static void dma_dump_state(struct NCR_ESP * esp); | ||
52 | static void dma_init_read(struct NCR_ESP * esp, char * vaddress, int length); | ||
53 | static void dma_init_write(struct NCR_ESP * esp, char * vaddress, int length); | ||
54 | static void dma_ints_off(struct NCR_ESP * esp); | ||
55 | static void dma_ints_on(struct NCR_ESP * esp); | ||
56 | static int dma_irq_p(struct NCR_ESP * esp); | ||
57 | static int dma_irq_p_quick(struct NCR_ESP * esp); | ||
58 | static void dma_led_off(struct NCR_ESP * esp); | ||
59 | static void dma_led_on(struct NCR_ESP *esp); | ||
60 | static int dma_ports_p(struct NCR_ESP *esp); | ||
61 | static void dma_setup(struct NCR_ESP * esp, __u32 addr, int count, int write); | ||
62 | static void dma_setup_quick(struct NCR_ESP * esp, __u32 addr, int count, int write); | ||
63 | |||
64 | static int esp_dafb_dma_irq_p(struct NCR_ESP * espdev); | ||
65 | static int esp_iosb_dma_irq_p(struct NCR_ESP * espdev); | ||
66 | |||
67 | static 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 | |||
73 | static int esp_initialized = 0; | ||
74 | |||
75 | static int setup_num_esps = -1; | ||
76 | static int setup_disconnect = -1; | ||
77 | static int setup_nosync = -1; | ||
78 | static int setup_can_queue = -1; | ||
79 | static int setup_cmd_per_lun = -1; | ||
80 | static int setup_sg_tablesize = -1; | ||
81 | #ifdef SUPPORT_TAGS | ||
82 | static int setup_use_tagged_queuing = -1; | ||
83 | #endif | ||
84 | static 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 | |||
91 | void 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 | |||
125 | void 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 | |||
133 | void 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 | |||
142 | irqreturn_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 | |||
162 | static 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 | |||
256 | unsigned 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 | |||
300 | int 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 | |||
471 | static 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 | |||
506 | static 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 | |||
547 | static 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 | |||
570 | static 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 | |||
585 | static 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 | |||
608 | static 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 | |||
625 | static void dma_init_read(struct NCR_ESP * esp, char * vaddress, int length) | ||
626 | { | ||
627 | printk("mac_esp: dma_init_read\n"); | ||
628 | } | ||
629 | |||
630 | |||
631 | static void dma_init_write(struct NCR_ESP * esp, char * vaddress, int length) | ||
632 | { | ||
633 | printk("mac_esp: dma_init_write\n"); | ||
634 | } | ||
635 | |||
636 | |||
637 | static void dma_ints_off(struct NCR_ESP * esp) | ||
638 | { | ||
639 | disable_irq(esp->irq); | ||
640 | } | ||
641 | |||
642 | |||
643 | static 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 | |||
652 | static 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 | |||
663 | static 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 | |||
686 | static 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 | |||
694 | static 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 | |||
702 | static int dma_ports_p(struct NCR_ESP * esp) | ||
703 | { | ||
704 | return 0; | ||
705 | } | ||
706 | |||
707 | |||
708 | static 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 | |||
723 | static 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 | |||
730 | static 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 | |||
751 | MODULE_LICENSE("GPL"); | ||