Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Generic Macintosh NCR5380 driver | |
3 | * | |
4 | * Copyright 1998, Michael Schmitz <mschmitz@lbl.gov> | |
5 | * | |
6 | * derived in part from: | |
7 | */ | |
8 | /* | |
9 | * Generic Generic NCR5380 driver | |
10 | * | |
11 | * Copyright 1995, Russell King | |
1da177e4 LT |
12 | */ |
13 | ||
1da177e4 | 14 | #include <linux/types.h> |
1da177e4 | 15 | #include <linux/module.h> |
1da177e4 LT |
16 | #include <linux/ioport.h> |
17 | #include <linux/init.h> | |
18 | #include <linux/blkdev.h> | |
19 | #include <linux/interrupt.h> | |
cbad48de | 20 | #include <linux/platform_device.h> |
1da177e4 | 21 | |
cbad48de | 22 | #include <asm/hwtest.h> |
1da177e4 | 23 | #include <asm/io.h> |
1da177e4 | 24 | #include <asm/macints.h> |
cbad48de | 25 | #include <asm/setup.h> |
1da177e4 | 26 | |
1da177e4 | 27 | #include <scsi/scsi_host.h> |
92de3831 FT |
28 | |
29 | /* Definitions for the core NCR5380 driver. */ | |
e744fdea | 30 | |
e744fdea BH |
31 | #define PSEUDO_DMA |
32 | ||
cbad48de | 33 | #define NCR5380_implementation_fields unsigned char *pdma_base |
92de3831 | 34 | |
54d8fe44 FT |
35 | #define NCR5380_read(reg) macscsi_read(instance, reg) |
36 | #define NCR5380_write(reg, value) macscsi_write(instance, reg, value) | |
92de3831 FT |
37 | |
38 | #define NCR5380_pread macscsi_pread | |
39 | #define NCR5380_pwrite macscsi_pwrite | |
ff3d4578 | 40 | #define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize) |
92de3831 FT |
41 | |
42 | #define NCR5380_intr macscsi_intr | |
43 | #define NCR5380_queue_command macscsi_queue_command | |
44 | #define NCR5380_abort macscsi_abort | |
45 | #define NCR5380_bus_reset macscsi_bus_reset | |
46 | #define NCR5380_info macscsi_info | |
47 | #define NCR5380_show_info macscsi_show_info | |
48 | #define NCR5380_write_info macscsi_write_info | |
49 | ||
1da177e4 LT |
50 | #include "NCR5380.h" |
51 | ||
1da177e4 | 52 | static int setup_can_queue = -1; |
6e9ae6d5 | 53 | module_param(setup_can_queue, int, 0); |
1da177e4 | 54 | static int setup_cmd_per_lun = -1; |
6e9ae6d5 | 55 | module_param(setup_cmd_per_lun, int, 0); |
1da177e4 | 56 | static int setup_sg_tablesize = -1; |
6e9ae6d5 | 57 | module_param(setup_sg_tablesize, int, 0); |
1da177e4 | 58 | static int setup_use_pdma = -1; |
6e9ae6d5 | 59 | module_param(setup_use_pdma, int, 0); |
1da177e4 | 60 | static int setup_use_tagged_queuing = -1; |
6e9ae6d5 | 61 | module_param(setup_use_tagged_queuing, int, 0); |
1da177e4 | 62 | static int setup_hostid = -1; |
6e9ae6d5 | 63 | module_param(setup_hostid, int, 0); |
9c3f0e2b FT |
64 | static int setup_toshiba_delay = -1; |
65 | module_param(setup_toshiba_delay, int, 0); | |
1da177e4 | 66 | |
1da177e4 LT |
67 | /* |
68 | * NCR 5380 register access functions | |
69 | */ | |
70 | ||
cbad48de | 71 | static inline char macscsi_read(struct Scsi_Host *instance, int reg) |
1da177e4 | 72 | { |
cbad48de | 73 | return in_8(instance->base + (reg << 4)); |
1da177e4 LT |
74 | } |
75 | ||
cbad48de | 76 | static inline void macscsi_write(struct Scsi_Host *instance, int reg, int value) |
1da177e4 | 77 | { |
cbad48de | 78 | out_8(instance->base + (reg << 4), value); |
1da177e4 | 79 | } |
1da177e4 | 80 | |
6e9ae6d5 FT |
81 | #ifndef MODULE |
82 | static int __init mac_scsi_setup(char *str) | |
83 | { | |
9c3f0e2b | 84 | int ints[8]; |
6e9ae6d5 FT |
85 | |
86 | (void)get_options(str, ARRAY_SIZE(ints), ints); | |
87 | ||
9c3f0e2b FT |
88 | if (ints[0] < 1) { |
89 | pr_err("Usage: mac5380=<can_queue>[,<cmd_per_lun>[,<sg_tablesize>[,<hostid>[,<use_tags>[,<use_pdma>[,<toshiba_delay>]]]]]]\n"); | |
6e9ae6d5 | 90 | return 0; |
1da177e4 | 91 | } |
6e9ae6d5 FT |
92 | if (ints[0] >= 1) |
93 | setup_can_queue = ints[1]; | |
94 | if (ints[0] >= 2) | |
95 | setup_cmd_per_lun = ints[2]; | |
96 | if (ints[0] >= 3) | |
97 | setup_sg_tablesize = ints[3]; | |
98 | if (ints[0] >= 4) | |
99 | setup_hostid = ints[4]; | |
100 | if (ints[0] >= 5) | |
101 | setup_use_tagged_queuing = ints[5]; | |
102 | if (ints[0] >= 6) | |
1da177e4 | 103 | setup_use_pdma = ints[6]; |
9c3f0e2b FT |
104 | if (ints[0] >= 7) |
105 | setup_toshiba_delay = ints[7]; | |
1da177e4 LT |
106 | return 1; |
107 | } | |
108 | ||
109 | __setup("mac5380=", mac_scsi_setup); | |
6e9ae6d5 | 110 | #endif /* !MODULE */ |
1da177e4 | 111 | |
ffdede67 | 112 | #ifdef PSEUDO_DMA |
1da177e4 LT |
113 | /* |
114 | Pseudo-DMA: (Ove Edlund) | |
115 | The code attempts to catch bus errors that occur if one for example | |
116 | "trips over the cable". | |
117 | XXX: Since bus errors in the PDMA routines never happen on my | |
118 | computer, the bus error code is untested. | |
119 | If the code works as intended, a bus error results in Pseudo-DMA | |
542cb459 | 120 | being disabled, meaning that the driver switches to slow handshake. |
1da177e4 LT |
121 | If bus errors are NOT extremely rare, this has to be changed. |
122 | */ | |
123 | ||
124 | #define CP_IO_TO_MEM(s,d,len) \ | |
125 | __asm__ __volatile__ \ | |
126 | (" cmp.w #4,%2\n" \ | |
127 | " bls 8f\n" \ | |
128 | " move.w %1,%%d0\n" \ | |
129 | " neg.b %%d0\n" \ | |
130 | " and.w #3,%%d0\n" \ | |
131 | " sub.w %%d0,%2\n" \ | |
132 | " bra 2f\n" \ | |
133 | " 1: move.b (%0),(%1)+\n" \ | |
134 | " 2: dbf %%d0,1b\n" \ | |
135 | " move.w %2,%%d0\n" \ | |
136 | " lsr.w #5,%%d0\n" \ | |
137 | " bra 4f\n" \ | |
138 | " 3: move.l (%0),(%1)+\n" \ | |
139 | "31: move.l (%0),(%1)+\n" \ | |
140 | "32: move.l (%0),(%1)+\n" \ | |
141 | "33: move.l (%0),(%1)+\n" \ | |
142 | "34: move.l (%0),(%1)+\n" \ | |
143 | "35: move.l (%0),(%1)+\n" \ | |
144 | "36: move.l (%0),(%1)+\n" \ | |
145 | "37: move.l (%0),(%1)+\n" \ | |
146 | " 4: dbf %%d0,3b\n" \ | |
147 | " move.w %2,%%d0\n" \ | |
148 | " lsr.w #2,%%d0\n" \ | |
149 | " and.w #7,%%d0\n" \ | |
150 | " bra 6f\n" \ | |
151 | " 5: move.l (%0),(%1)+\n" \ | |
152 | " 6: dbf %%d0,5b\n" \ | |
153 | " and.w #3,%2\n" \ | |
154 | " bra 8f\n" \ | |
155 | " 7: move.b (%0),(%1)+\n" \ | |
156 | " 8: dbf %2,7b\n" \ | |
157 | " moveq.l #0, %2\n" \ | |
158 | " 9: \n" \ | |
159 | ".section .fixup,\"ax\"\n" \ | |
160 | " .even\n" \ | |
161 | "90: moveq.l #1, %2\n" \ | |
162 | " jra 9b\n" \ | |
163 | ".previous\n" \ | |
164 | ".section __ex_table,\"a\"\n" \ | |
165 | " .align 4\n" \ | |
166 | " .long 1b,90b\n" \ | |
167 | " .long 3b,90b\n" \ | |
168 | " .long 31b,90b\n" \ | |
169 | " .long 32b,90b\n" \ | |
170 | " .long 33b,90b\n" \ | |
171 | " .long 34b,90b\n" \ | |
172 | " .long 35b,90b\n" \ | |
173 | " .long 36b,90b\n" \ | |
174 | " .long 37b,90b\n" \ | |
175 | " .long 5b,90b\n" \ | |
176 | " .long 7b,90b\n" \ | |
177 | ".previous" \ | |
178 | : "=a"(s), "=a"(d), "=d"(len) \ | |
179 | : "0"(s), "1"(d), "2"(len) \ | |
180 | : "d0") | |
181 | ||
ffdede67 FT |
182 | static int macscsi_pread(struct Scsi_Host *instance, |
183 | unsigned char *dst, int len) | |
1da177e4 | 184 | { |
cbad48de | 185 | struct NCR5380_hostdata *hostdata = shost_priv(instance); |
ffdede67 FT |
186 | unsigned char *d; |
187 | unsigned char *s; | |
188 | ||
cbad48de | 189 | s = hostdata->pdma_base + (INPUT_DATA_REG << 4); |
ffdede67 FT |
190 | d = dst; |
191 | ||
192 | /* These conditions are derived from MacOS */ | |
193 | ||
194 | while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) && | |
195 | !(NCR5380_read(STATUS_REG) & SR_REQ)) | |
196 | ; | |
197 | ||
198 | if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) && | |
199 | (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) { | |
200 | pr_err("Error in macscsi_pread\n"); | |
201 | return -1; | |
202 | } | |
203 | ||
204 | CP_IO_TO_MEM(s, d, len); | |
205 | ||
206 | if (len != 0) { | |
207 | pr_notice("Bus error in macscsi_pread\n"); | |
208 | return -1; | |
209 | } | |
210 | ||
211 | return 0; | |
1da177e4 LT |
212 | } |
213 | ||
214 | ||
215 | #define CP_MEM_TO_IO(s,d,len) \ | |
216 | __asm__ __volatile__ \ | |
217 | (" cmp.w #4,%2\n" \ | |
218 | " bls 8f\n" \ | |
219 | " move.w %0,%%d0\n" \ | |
220 | " neg.b %%d0\n" \ | |
221 | " and.w #3,%%d0\n" \ | |
222 | " sub.w %%d0,%2\n" \ | |
223 | " bra 2f\n" \ | |
224 | " 1: move.b (%0)+,(%1)\n" \ | |
225 | " 2: dbf %%d0,1b\n" \ | |
226 | " move.w %2,%%d0\n" \ | |
227 | " lsr.w #5,%%d0\n" \ | |
228 | " bra 4f\n" \ | |
229 | " 3: move.l (%0)+,(%1)\n" \ | |
230 | "31: move.l (%0)+,(%1)\n" \ | |
231 | "32: move.l (%0)+,(%1)\n" \ | |
232 | "33: move.l (%0)+,(%1)\n" \ | |
233 | "34: move.l (%0)+,(%1)\n" \ | |
234 | "35: move.l (%0)+,(%1)\n" \ | |
235 | "36: move.l (%0)+,(%1)\n" \ | |
236 | "37: move.l (%0)+,(%1)\n" \ | |
237 | " 4: dbf %%d0,3b\n" \ | |
238 | " move.w %2,%%d0\n" \ | |
239 | " lsr.w #2,%%d0\n" \ | |
240 | " and.w #7,%%d0\n" \ | |
241 | " bra 6f\n" \ | |
242 | " 5: move.l (%0)+,(%1)\n" \ | |
243 | " 6: dbf %%d0,5b\n" \ | |
244 | " and.w #3,%2\n" \ | |
245 | " bra 8f\n" \ | |
246 | " 7: move.b (%0)+,(%1)\n" \ | |
247 | " 8: dbf %2,7b\n" \ | |
248 | " moveq.l #0, %2\n" \ | |
249 | " 9: \n" \ | |
250 | ".section .fixup,\"ax\"\n" \ | |
251 | " .even\n" \ | |
252 | "90: moveq.l #1, %2\n" \ | |
253 | " jra 9b\n" \ | |
254 | ".previous\n" \ | |
255 | ".section __ex_table,\"a\"\n" \ | |
256 | " .align 4\n" \ | |
257 | " .long 1b,90b\n" \ | |
258 | " .long 3b,90b\n" \ | |
259 | " .long 31b,90b\n" \ | |
260 | " .long 32b,90b\n" \ | |
261 | " .long 33b,90b\n" \ | |
262 | " .long 34b,90b\n" \ | |
263 | " .long 35b,90b\n" \ | |
264 | " .long 36b,90b\n" \ | |
265 | " .long 37b,90b\n" \ | |
266 | " .long 5b,90b\n" \ | |
267 | " .long 7b,90b\n" \ | |
268 | ".previous" \ | |
269 | : "=a"(s), "=a"(d), "=d"(len) \ | |
270 | : "0"(s), "1"(d), "2"(len) \ | |
271 | : "d0") | |
272 | ||
ffdede67 FT |
273 | static int macscsi_pwrite(struct Scsi_Host *instance, |
274 | unsigned char *src, int len) | |
1da177e4 | 275 | { |
cbad48de | 276 | struct NCR5380_hostdata *hostdata = shost_priv(instance); |
ffdede67 FT |
277 | unsigned char *s; |
278 | unsigned char *d; | |
1da177e4 | 279 | |
ffdede67 | 280 | s = src; |
cbad48de | 281 | d = hostdata->pdma_base + (OUTPUT_DATA_REG << 4); |
ffdede67 FT |
282 | |
283 | /* These conditions are derived from MacOS */ | |
284 | ||
285 | while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) && | |
286 | (!(NCR5380_read(STATUS_REG) & SR_REQ) || | |
287 | (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH))) | |
288 | ; | |
289 | ||
290 | if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ)) { | |
291 | pr_err("Error in macscsi_pwrite\n"); | |
292 | return -1; | |
293 | } | |
294 | ||
295 | CP_MEM_TO_IO(s, d, len); | |
296 | ||
297 | if (len != 0) { | |
298 | pr_notice("Bus error in macscsi_pwrite\n"); | |
299 | return -1; | |
300 | } | |
301 | ||
302 | return 0; | |
303 | } | |
304 | #endif | |
1da177e4 | 305 | |
1da177e4 LT |
306 | #include "NCR5380.c" |
307 | ||
cbad48de FT |
308 | #define DRV_MODULE_NAME "mac_scsi" |
309 | #define PFX DRV_MODULE_NAME ": " | |
310 | ||
311 | static struct scsi_host_template mac_scsi_template = { | |
aa2e2cb1 FT |
312 | .module = THIS_MODULE, |
313 | .proc_name = DRV_MODULE_NAME, | |
314 | .show_info = macscsi_show_info, | |
315 | .write_info = macscsi_write_info, | |
316 | .name = "Macintosh NCR5380 SCSI", | |
317 | .info = macscsi_info, | |
318 | .queuecommand = macscsi_queue_command, | |
319 | .eh_abort_handler = macscsi_abort, | |
320 | .eh_bus_reset_handler = macscsi_bus_reset, | |
321 | .can_queue = 16, | |
322 | .this_id = 7, | |
323 | .sg_tablesize = SG_ALL, | |
324 | .cmd_per_lun = 2, | |
325 | .use_clustering = DISABLE_CLUSTERING, | |
1da177e4 LT |
326 | }; |
327 | ||
cbad48de FT |
328 | static int __init mac_scsi_probe(struct platform_device *pdev) |
329 | { | |
330 | struct Scsi_Host *instance; | |
331 | int error; | |
332 | int host_flags = 0; | |
333 | struct resource *irq, *pio_mem, *pdma_mem = NULL; | |
334 | ||
335 | pio_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
336 | if (!pio_mem) | |
337 | return -ENODEV; | |
338 | ||
339 | #ifdef PSEUDO_DMA | |
340 | pdma_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
341 | #endif | |
342 | ||
343 | irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
344 | ||
345 | if (!hwreg_present((unsigned char *)pio_mem->start + | |
346 | (STATUS_REG << 4))) { | |
347 | pr_info(PFX "no device detected at %pap\n", &pio_mem->start); | |
348 | return -ENODEV; | |
349 | } | |
350 | ||
351 | if (setup_can_queue > 0) | |
352 | mac_scsi_template.can_queue = setup_can_queue; | |
353 | if (setup_cmd_per_lun > 0) | |
354 | mac_scsi_template.cmd_per_lun = setup_cmd_per_lun; | |
355 | if (setup_sg_tablesize >= 0) | |
356 | mac_scsi_template.sg_tablesize = setup_sg_tablesize; | |
357 | if (setup_hostid >= 0) | |
358 | mac_scsi_template.this_id = setup_hostid & 7; | |
cbad48de FT |
359 | if (setup_use_pdma < 0) |
360 | setup_use_pdma = 0; | |
361 | ||
362 | instance = scsi_host_alloc(&mac_scsi_template, | |
363 | sizeof(struct NCR5380_hostdata)); | |
364 | if (!instance) | |
365 | return -ENOMEM; | |
366 | ||
367 | instance->base = pio_mem->start; | |
368 | if (irq) | |
369 | instance->irq = irq->start; | |
370 | else | |
371 | instance->irq = NO_IRQ; | |
372 | ||
373 | if (pdma_mem && setup_use_pdma) { | |
374 | struct NCR5380_hostdata *hostdata = shost_priv(instance); | |
375 | ||
376 | hostdata->pdma_base = (unsigned char *)pdma_mem->start; | |
377 | } else | |
378 | host_flags |= FLAG_NO_PSEUDO_DMA; | |
379 | ||
ca513fc9 FT |
380 | #ifdef SUPPORT_TAGS |
381 | host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0; | |
382 | #endif | |
9c3f0e2b | 383 | host_flags |= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0; |
ca513fc9 | 384 | |
0ad0eff9 FT |
385 | error = NCR5380_init(instance, host_flags); |
386 | if (error) | |
387 | goto fail_init; | |
cbad48de FT |
388 | |
389 | if (instance->irq != NO_IRQ) { | |
390 | error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED, | |
391 | "NCR5380", instance); | |
392 | if (error) | |
393 | goto fail_irq; | |
394 | } | |
395 | ||
9c3f0e2b FT |
396 | NCR5380_maybe_reset_bus(instance); |
397 | ||
cbad48de FT |
398 | error = scsi_add_host(instance, NULL); |
399 | if (error) | |
400 | goto fail_host; | |
401 | ||
402 | platform_set_drvdata(pdev, instance); | |
403 | ||
404 | scsi_scan_host(instance); | |
405 | return 0; | |
406 | ||
407 | fail_host: | |
408 | if (instance->irq != NO_IRQ) | |
409 | free_irq(instance->irq, instance); | |
410 | fail_irq: | |
411 | NCR5380_exit(instance); | |
0ad0eff9 | 412 | fail_init: |
cbad48de FT |
413 | scsi_host_put(instance); |
414 | return error; | |
415 | } | |
416 | ||
417 | static int __exit mac_scsi_remove(struct platform_device *pdev) | |
418 | { | |
419 | struct Scsi_Host *instance = platform_get_drvdata(pdev); | |
420 | ||
421 | scsi_remove_host(instance); | |
422 | if (instance->irq != NO_IRQ) | |
423 | free_irq(instance->irq, instance); | |
424 | NCR5380_exit(instance); | |
425 | scsi_host_put(instance); | |
426 | return 0; | |
427 | } | |
428 | ||
429 | static struct platform_driver mac_scsi_driver = { | |
430 | .remove = __exit_p(mac_scsi_remove), | |
431 | .driver = { | |
432 | .name = DRV_MODULE_NAME, | |
cbad48de FT |
433 | }, |
434 | }; | |
1da177e4 | 435 | |
cbad48de | 436 | module_platform_driver_probe(mac_scsi_driver, mac_scsi_probe); |
6e9ae6d5 | 437 | |
cbad48de | 438 | MODULE_ALIAS("platform:" DRV_MODULE_NAME); |
6e9ae6d5 | 439 | MODULE_LICENSE("GPL"); |