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Commit | Line | Data |
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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 | |
cbad48de | 31 | #define NCR5380_implementation_fields unsigned char *pdma_base |
92de3831 | 32 | |
54d8fe44 FT |
33 | #define NCR5380_read(reg) macscsi_read(instance, reg) |
34 | #define NCR5380_write(reg, value) macscsi_write(instance, reg, value) | |
92de3831 | 35 | |
7e9ec8d9 FT |
36 | #define NCR5380_dma_xfer_len(instance, cmd, phase) \ |
37 | macscsi_dma_xfer_len(instance, cmd) | |
6c4b88ca FT |
38 | #define NCR5380_dma_recv_setup macscsi_pread |
39 | #define NCR5380_dma_send_setup macscsi_pwrite | |
8053b0ee | 40 | #define NCR5380_dma_residual(instance) (0) |
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 | |
92de3831 | 47 | |
1da177e4 LT |
48 | #include "NCR5380.h" |
49 | ||
1da177e4 | 50 | static int setup_can_queue = -1; |
6e9ae6d5 | 51 | module_param(setup_can_queue, int, 0); |
1da177e4 | 52 | static int setup_cmd_per_lun = -1; |
6e9ae6d5 | 53 | module_param(setup_cmd_per_lun, int, 0); |
1da177e4 | 54 | static int setup_sg_tablesize = -1; |
6e9ae6d5 | 55 | module_param(setup_sg_tablesize, int, 0); |
1da177e4 | 56 | static int setup_use_pdma = -1; |
6e9ae6d5 | 57 | module_param(setup_use_pdma, int, 0); |
1da177e4 | 58 | static int setup_hostid = -1; |
6e9ae6d5 | 59 | module_param(setup_hostid, int, 0); |
9c3f0e2b FT |
60 | static int setup_toshiba_delay = -1; |
61 | module_param(setup_toshiba_delay, int, 0); | |
1da177e4 | 62 | |
1da177e4 LT |
63 | /* |
64 | * NCR 5380 register access functions | |
65 | */ | |
66 | ||
cbad48de | 67 | static inline char macscsi_read(struct Scsi_Host *instance, int reg) |
1da177e4 | 68 | { |
cbad48de | 69 | return in_8(instance->base + (reg << 4)); |
1da177e4 LT |
70 | } |
71 | ||
cbad48de | 72 | static inline void macscsi_write(struct Scsi_Host *instance, int reg, int value) |
1da177e4 | 73 | { |
cbad48de | 74 | out_8(instance->base + (reg << 4), value); |
1da177e4 | 75 | } |
1da177e4 | 76 | |
6e9ae6d5 FT |
77 | #ifndef MODULE |
78 | static int __init mac_scsi_setup(char *str) | |
79 | { | |
9c3f0e2b | 80 | int ints[8]; |
6e9ae6d5 FT |
81 | |
82 | (void)get_options(str, ARRAY_SIZE(ints), ints); | |
83 | ||
9c3f0e2b FT |
84 | if (ints[0] < 1) { |
85 | pr_err("Usage: mac5380=<can_queue>[,<cmd_per_lun>[,<sg_tablesize>[,<hostid>[,<use_tags>[,<use_pdma>[,<toshiba_delay>]]]]]]\n"); | |
6e9ae6d5 | 86 | return 0; |
1da177e4 | 87 | } |
6e9ae6d5 FT |
88 | if (ints[0] >= 1) |
89 | setup_can_queue = ints[1]; | |
90 | if (ints[0] >= 2) | |
91 | setup_cmd_per_lun = ints[2]; | |
92 | if (ints[0] >= 3) | |
93 | setup_sg_tablesize = ints[3]; | |
94 | if (ints[0] >= 4) | |
95 | setup_hostid = ints[4]; | |
c4ec6f92 | 96 | /* ints[5] (use_tagged_queuing) is ignored */ |
6e9ae6d5 | 97 | if (ints[0] >= 6) |
1da177e4 | 98 | setup_use_pdma = ints[6]; |
9c3f0e2b FT |
99 | if (ints[0] >= 7) |
100 | setup_toshiba_delay = ints[7]; | |
1da177e4 LT |
101 | return 1; |
102 | } | |
103 | ||
104 | __setup("mac5380=", mac_scsi_setup); | |
6e9ae6d5 | 105 | #endif /* !MODULE */ |
1da177e4 | 106 | |
1da177e4 LT |
107 | /* |
108 | Pseudo-DMA: (Ove Edlund) | |
109 | The code attempts to catch bus errors that occur if one for example | |
110 | "trips over the cable". | |
111 | XXX: Since bus errors in the PDMA routines never happen on my | |
112 | computer, the bus error code is untested. | |
113 | If the code works as intended, a bus error results in Pseudo-DMA | |
542cb459 | 114 | being disabled, meaning that the driver switches to slow handshake. |
1da177e4 LT |
115 | If bus errors are NOT extremely rare, this has to be changed. |
116 | */ | |
117 | ||
118 | #define CP_IO_TO_MEM(s,d,len) \ | |
119 | __asm__ __volatile__ \ | |
120 | (" cmp.w #4,%2\n" \ | |
121 | " bls 8f\n" \ | |
122 | " move.w %1,%%d0\n" \ | |
123 | " neg.b %%d0\n" \ | |
124 | " and.w #3,%%d0\n" \ | |
125 | " sub.w %%d0,%2\n" \ | |
126 | " bra 2f\n" \ | |
127 | " 1: move.b (%0),(%1)+\n" \ | |
128 | " 2: dbf %%d0,1b\n" \ | |
129 | " move.w %2,%%d0\n" \ | |
130 | " lsr.w #5,%%d0\n" \ | |
131 | " bra 4f\n" \ | |
132 | " 3: move.l (%0),(%1)+\n" \ | |
133 | "31: move.l (%0),(%1)+\n" \ | |
134 | "32: move.l (%0),(%1)+\n" \ | |
135 | "33: move.l (%0),(%1)+\n" \ | |
136 | "34: move.l (%0),(%1)+\n" \ | |
137 | "35: move.l (%0),(%1)+\n" \ | |
138 | "36: move.l (%0),(%1)+\n" \ | |
139 | "37: move.l (%0),(%1)+\n" \ | |
140 | " 4: dbf %%d0,3b\n" \ | |
141 | " move.w %2,%%d0\n" \ | |
142 | " lsr.w #2,%%d0\n" \ | |
143 | " and.w #7,%%d0\n" \ | |
144 | " bra 6f\n" \ | |
145 | " 5: move.l (%0),(%1)+\n" \ | |
146 | " 6: dbf %%d0,5b\n" \ | |
147 | " and.w #3,%2\n" \ | |
148 | " bra 8f\n" \ | |
149 | " 7: move.b (%0),(%1)+\n" \ | |
150 | " 8: dbf %2,7b\n" \ | |
151 | " moveq.l #0, %2\n" \ | |
152 | " 9: \n" \ | |
153 | ".section .fixup,\"ax\"\n" \ | |
154 | " .even\n" \ | |
155 | "90: moveq.l #1, %2\n" \ | |
156 | " jra 9b\n" \ | |
157 | ".previous\n" \ | |
158 | ".section __ex_table,\"a\"\n" \ | |
159 | " .align 4\n" \ | |
160 | " .long 1b,90b\n" \ | |
161 | " .long 3b,90b\n" \ | |
162 | " .long 31b,90b\n" \ | |
163 | " .long 32b,90b\n" \ | |
164 | " .long 33b,90b\n" \ | |
165 | " .long 34b,90b\n" \ | |
166 | " .long 35b,90b\n" \ | |
167 | " .long 36b,90b\n" \ | |
168 | " .long 37b,90b\n" \ | |
169 | " .long 5b,90b\n" \ | |
170 | " .long 7b,90b\n" \ | |
171 | ".previous" \ | |
172 | : "=a"(s), "=a"(d), "=d"(len) \ | |
173 | : "0"(s), "1"(d), "2"(len) \ | |
174 | : "d0") | |
175 | ||
ffdede67 FT |
176 | static int macscsi_pread(struct Scsi_Host *instance, |
177 | unsigned char *dst, int len) | |
1da177e4 | 178 | { |
cbad48de | 179 | struct NCR5380_hostdata *hostdata = shost_priv(instance); |
ffdede67 FT |
180 | unsigned char *d; |
181 | unsigned char *s; | |
182 | ||
cbad48de | 183 | s = hostdata->pdma_base + (INPUT_DATA_REG << 4); |
ffdede67 FT |
184 | d = dst; |
185 | ||
186 | /* These conditions are derived from MacOS */ | |
187 | ||
188 | while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) && | |
189 | !(NCR5380_read(STATUS_REG) & SR_REQ)) | |
190 | ; | |
191 | ||
192 | if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) && | |
193 | (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) { | |
194 | pr_err("Error in macscsi_pread\n"); | |
195 | return -1; | |
196 | } | |
197 | ||
198 | CP_IO_TO_MEM(s, d, len); | |
199 | ||
200 | if (len != 0) { | |
201 | pr_notice("Bus error in macscsi_pread\n"); | |
202 | return -1; | |
203 | } | |
204 | ||
205 | return 0; | |
1da177e4 LT |
206 | } |
207 | ||
208 | ||
209 | #define CP_MEM_TO_IO(s,d,len) \ | |
210 | __asm__ __volatile__ \ | |
211 | (" cmp.w #4,%2\n" \ | |
212 | " bls 8f\n" \ | |
213 | " move.w %0,%%d0\n" \ | |
214 | " neg.b %%d0\n" \ | |
215 | " and.w #3,%%d0\n" \ | |
216 | " sub.w %%d0,%2\n" \ | |
217 | " bra 2f\n" \ | |
218 | " 1: move.b (%0)+,(%1)\n" \ | |
219 | " 2: dbf %%d0,1b\n" \ | |
220 | " move.w %2,%%d0\n" \ | |
221 | " lsr.w #5,%%d0\n" \ | |
222 | " bra 4f\n" \ | |
223 | " 3: move.l (%0)+,(%1)\n" \ | |
224 | "31: move.l (%0)+,(%1)\n" \ | |
225 | "32: move.l (%0)+,(%1)\n" \ | |
226 | "33: move.l (%0)+,(%1)\n" \ | |
227 | "34: move.l (%0)+,(%1)\n" \ | |
228 | "35: move.l (%0)+,(%1)\n" \ | |
229 | "36: move.l (%0)+,(%1)\n" \ | |
230 | "37: move.l (%0)+,(%1)\n" \ | |
231 | " 4: dbf %%d0,3b\n" \ | |
232 | " move.w %2,%%d0\n" \ | |
233 | " lsr.w #2,%%d0\n" \ | |
234 | " and.w #7,%%d0\n" \ | |
235 | " bra 6f\n" \ | |
236 | " 5: move.l (%0)+,(%1)\n" \ | |
237 | " 6: dbf %%d0,5b\n" \ | |
238 | " and.w #3,%2\n" \ | |
239 | " bra 8f\n" \ | |
240 | " 7: move.b (%0)+,(%1)\n" \ | |
241 | " 8: dbf %2,7b\n" \ | |
242 | " moveq.l #0, %2\n" \ | |
243 | " 9: \n" \ | |
244 | ".section .fixup,\"ax\"\n" \ | |
245 | " .even\n" \ | |
246 | "90: moveq.l #1, %2\n" \ | |
247 | " jra 9b\n" \ | |
248 | ".previous\n" \ | |
249 | ".section __ex_table,\"a\"\n" \ | |
250 | " .align 4\n" \ | |
251 | " .long 1b,90b\n" \ | |
252 | " .long 3b,90b\n" \ | |
253 | " .long 31b,90b\n" \ | |
254 | " .long 32b,90b\n" \ | |
255 | " .long 33b,90b\n" \ | |
256 | " .long 34b,90b\n" \ | |
257 | " .long 35b,90b\n" \ | |
258 | " .long 36b,90b\n" \ | |
259 | " .long 37b,90b\n" \ | |
260 | " .long 5b,90b\n" \ | |
261 | " .long 7b,90b\n" \ | |
262 | ".previous" \ | |
263 | : "=a"(s), "=a"(d), "=d"(len) \ | |
264 | : "0"(s), "1"(d), "2"(len) \ | |
265 | : "d0") | |
266 | ||
ffdede67 FT |
267 | static int macscsi_pwrite(struct Scsi_Host *instance, |
268 | unsigned char *src, int len) | |
1da177e4 | 269 | { |
cbad48de | 270 | struct NCR5380_hostdata *hostdata = shost_priv(instance); |
ffdede67 FT |
271 | unsigned char *s; |
272 | unsigned char *d; | |
1da177e4 | 273 | |
ffdede67 | 274 | s = src; |
cbad48de | 275 | d = hostdata->pdma_base + (OUTPUT_DATA_REG << 4); |
ffdede67 FT |
276 | |
277 | /* These conditions are derived from MacOS */ | |
278 | ||
279 | while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) && | |
280 | (!(NCR5380_read(STATUS_REG) & SR_REQ) || | |
281 | (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH))) | |
282 | ; | |
283 | ||
284 | if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ)) { | |
285 | pr_err("Error in macscsi_pwrite\n"); | |
286 | return -1; | |
287 | } | |
288 | ||
289 | CP_MEM_TO_IO(s, d, len); | |
290 | ||
291 | if (len != 0) { | |
292 | pr_notice("Bus error in macscsi_pwrite\n"); | |
293 | return -1; | |
294 | } | |
295 | ||
296 | return 0; | |
297 | } | |
1da177e4 | 298 | |
7e9ec8d9 FT |
299 | static int macscsi_dma_xfer_len(struct Scsi_Host *instance, |
300 | struct scsi_cmnd *cmd) | |
301 | { | |
302 | struct NCR5380_hostdata *hostdata = shost_priv(instance); | |
303 | ||
304 | if (hostdata->flags & FLAG_NO_PSEUDO_DMA) | |
305 | return 0; | |
306 | ||
307 | return cmd->transfersize; | |
308 | } | |
309 | ||
1da177e4 LT |
310 | #include "NCR5380.c" |
311 | ||
cbad48de FT |
312 | #define DRV_MODULE_NAME "mac_scsi" |
313 | #define PFX DRV_MODULE_NAME ": " | |
314 | ||
315 | static struct scsi_host_template mac_scsi_template = { | |
aa2e2cb1 FT |
316 | .module = THIS_MODULE, |
317 | .proc_name = DRV_MODULE_NAME, | |
aa2e2cb1 FT |
318 | .name = "Macintosh NCR5380 SCSI", |
319 | .info = macscsi_info, | |
320 | .queuecommand = macscsi_queue_command, | |
321 | .eh_abort_handler = macscsi_abort, | |
322 | .eh_bus_reset_handler = macscsi_bus_reset, | |
323 | .can_queue = 16, | |
324 | .this_id = 7, | |
325 | .sg_tablesize = SG_ALL, | |
326 | .cmd_per_lun = 2, | |
327 | .use_clustering = DISABLE_CLUSTERING, | |
32b26a10 | 328 | .cmd_size = NCR5380_CMD_SIZE, |
0a4e3612 | 329 | .max_sectors = 128, |
1da177e4 LT |
330 | }; |
331 | ||
cbad48de FT |
332 | static int __init mac_scsi_probe(struct platform_device *pdev) |
333 | { | |
334 | struct Scsi_Host *instance; | |
335 | int error; | |
336 | int host_flags = 0; | |
337 | struct resource *irq, *pio_mem, *pdma_mem = NULL; | |
338 | ||
339 | pio_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
340 | if (!pio_mem) | |
341 | return -ENODEV; | |
342 | ||
cbad48de | 343 | pdma_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
cbad48de FT |
344 | |
345 | irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
346 | ||
347 | if (!hwreg_present((unsigned char *)pio_mem->start + | |
348 | (STATUS_REG << 4))) { | |
349 | pr_info(PFX "no device detected at %pap\n", &pio_mem->start); | |
350 | return -ENODEV; | |
351 | } | |
352 | ||
353 | if (setup_can_queue > 0) | |
354 | mac_scsi_template.can_queue = setup_can_queue; | |
355 | if (setup_cmd_per_lun > 0) | |
356 | mac_scsi_template.cmd_per_lun = setup_cmd_per_lun; | |
357 | if (setup_sg_tablesize >= 0) | |
358 | mac_scsi_template.sg_tablesize = setup_sg_tablesize; | |
359 | if (setup_hostid >= 0) | |
360 | mac_scsi_template.this_id = setup_hostid & 7; | |
cbad48de FT |
361 | if (setup_use_pdma < 0) |
362 | setup_use_pdma = 0; | |
363 | ||
364 | instance = scsi_host_alloc(&mac_scsi_template, | |
365 | sizeof(struct NCR5380_hostdata)); | |
366 | if (!instance) | |
367 | return -ENOMEM; | |
368 | ||
369 | instance->base = pio_mem->start; | |
370 | if (irq) | |
371 | instance->irq = irq->start; | |
372 | else | |
373 | instance->irq = NO_IRQ; | |
374 | ||
375 | if (pdma_mem && setup_use_pdma) { | |
376 | struct NCR5380_hostdata *hostdata = shost_priv(instance); | |
377 | ||
378 | hostdata->pdma_base = (unsigned char *)pdma_mem->start; | |
379 | } else | |
380 | host_flags |= FLAG_NO_PSEUDO_DMA; | |
381 | ||
9c3f0e2b | 382 | host_flags |= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0; |
ca513fc9 | 383 | |
8053b0ee | 384 | error = NCR5380_init(instance, host_flags | FLAG_LATE_DMA_SETUP); |
0ad0eff9 FT |
385 | if (error) |
386 | goto fail_init; | |
cbad48de FT |
387 | |
388 | if (instance->irq != NO_IRQ) { | |
389 | error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED, | |
390 | "NCR5380", instance); | |
391 | if (error) | |
392 | goto fail_irq; | |
393 | } | |
394 | ||
9c3f0e2b FT |
395 | NCR5380_maybe_reset_bus(instance); |
396 | ||
cbad48de FT |
397 | error = scsi_add_host(instance, NULL); |
398 | if (error) | |
399 | goto fail_host; | |
400 | ||
401 | platform_set_drvdata(pdev, instance); | |
402 | ||
403 | scsi_scan_host(instance); | |
404 | return 0; | |
405 | ||
406 | fail_host: | |
407 | if (instance->irq != NO_IRQ) | |
408 | free_irq(instance->irq, instance); | |
409 | fail_irq: | |
410 | NCR5380_exit(instance); | |
0ad0eff9 | 411 | fail_init: |
cbad48de FT |
412 | scsi_host_put(instance); |
413 | return error; | |
414 | } | |
415 | ||
416 | static int __exit mac_scsi_remove(struct platform_device *pdev) | |
417 | { | |
418 | struct Scsi_Host *instance = platform_get_drvdata(pdev); | |
419 | ||
420 | scsi_remove_host(instance); | |
421 | if (instance->irq != NO_IRQ) | |
422 | free_irq(instance->irq, instance); | |
423 | NCR5380_exit(instance); | |
424 | scsi_host_put(instance); | |
425 | return 0; | |
426 | } | |
427 | ||
428 | static struct platform_driver mac_scsi_driver = { | |
429 | .remove = __exit_p(mac_scsi_remove), | |
430 | .driver = { | |
431 | .name = DRV_MODULE_NAME, | |
cbad48de FT |
432 | }, |
433 | }; | |
1da177e4 | 434 | |
cbad48de | 435 | module_platform_driver_probe(mac_scsi_driver, mac_scsi_probe); |
6e9ae6d5 | 436 | |
cbad48de | 437 | MODULE_ALIAS("platform:" DRV_MODULE_NAME); |
6e9ae6d5 | 438 | MODULE_LICENSE("GPL"); |