1
2
3
4
5
6
7
8
9
10
11
12
13
14#include <linux/types.h>
15#include <linux/module.h>
16#include <linux/ioport.h>
17#include <linux/init.h>
18#include <linux/blkdev.h>
19#include <linux/interrupt.h>
20#include <linux/platform_device.h>
21
22#include <asm/hwtest.h>
23#include <asm/io.h>
24#include <asm/macints.h>
25#include <asm/setup.h>
26
27#include <scsi/scsi_host.h>
28
29
30
31#define PSEUDO_DMA
32
33#define NCR5380_implementation_fields unsigned char *pdma_base
34
35#define NCR5380_read(reg) macscsi_read(instance, reg)
36#define NCR5380_write(reg, value) macscsi_write(instance, reg, value)
37
38#define NCR5380_pread macscsi_pread
39#define NCR5380_pwrite macscsi_pwrite
40#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
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
50#include "NCR5380.h"
51
52static int setup_can_queue = -1;
53module_param(setup_can_queue, int, 0);
54static int setup_cmd_per_lun = -1;
55module_param(setup_cmd_per_lun, int, 0);
56static int setup_sg_tablesize = -1;
57module_param(setup_sg_tablesize, int, 0);
58static int setup_use_pdma = -1;
59module_param(setup_use_pdma, int, 0);
60static int setup_use_tagged_queuing = -1;
61module_param(setup_use_tagged_queuing, int, 0);
62static int setup_hostid = -1;
63module_param(setup_hostid, int, 0);
64static int setup_toshiba_delay = -1;
65module_param(setup_toshiba_delay, int, 0);
66
67
68
69
70
71static inline char macscsi_read(struct Scsi_Host *instance, int reg)
72{
73 return in_8(instance->base + (reg << 4));
74}
75
76static inline void macscsi_write(struct Scsi_Host *instance, int reg, int value)
77{
78 out_8(instance->base + (reg << 4), value);
79}
80
81#ifndef MODULE
82static int __init mac_scsi_setup(char *str)
83{
84 int ints[8];
85
86 (void)get_options(str, ARRAY_SIZE(ints), ints);
87
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");
90 return 0;
91 }
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)
103 setup_use_pdma = ints[6];
104 if (ints[0] >= 7)
105 setup_toshiba_delay = ints[7];
106 return 1;
107}
108
109__setup("mac5380=", mac_scsi_setup);
110#endif
111
112#ifdef PSEUDO_DMA
113
114
115
116
117
118
119
120
121
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
182static int macscsi_pread(struct Scsi_Host *instance,
183 unsigned char *dst, int len)
184{
185 struct NCR5380_hostdata *hostdata = shost_priv(instance);
186 unsigned char *d;
187 unsigned char *s;
188
189 s = hostdata->pdma_base + (INPUT_DATA_REG << 4);
190 d = dst;
191
192
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;
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
273static int macscsi_pwrite(struct Scsi_Host *instance,
274 unsigned char *src, int len)
275{
276 struct NCR5380_hostdata *hostdata = shost_priv(instance);
277 unsigned char *s;
278 unsigned char *d;
279
280 s = src;
281 d = hostdata->pdma_base + (OUTPUT_DATA_REG << 4);
282
283
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
305
306#include "NCR5380.c"
307
308#define DRV_MODULE_NAME "mac_scsi"
309#define PFX DRV_MODULE_NAME ": "
310
311static struct scsi_host_template mac_scsi_template = {
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,
326 .cmd_size = NCR5380_CMD_SIZE,
327 .max_sectors = 128,
328};
329
330static int __init mac_scsi_probe(struct platform_device *pdev)
331{
332 struct Scsi_Host *instance;
333 int error;
334 int host_flags = 0;
335 struct resource *irq, *pio_mem, *pdma_mem = NULL;
336
337 pio_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
338 if (!pio_mem)
339 return -ENODEV;
340
341#ifdef PSEUDO_DMA
342 pdma_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
343#endif
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;
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
382#ifdef SUPPORT_TAGS
383 host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0;
384#endif
385 host_flags |= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0;
386
387 error = NCR5380_init(instance, host_flags);
388 if (error)
389 goto fail_init;
390
391 if (instance->irq != NO_IRQ) {
392 error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED,
393 "NCR5380", instance);
394 if (error)
395 goto fail_irq;
396 }
397
398 NCR5380_maybe_reset_bus(instance);
399
400 error = scsi_add_host(instance, NULL);
401 if (error)
402 goto fail_host;
403
404 platform_set_drvdata(pdev, instance);
405
406 scsi_scan_host(instance);
407 return 0;
408
409fail_host:
410 if (instance->irq != NO_IRQ)
411 free_irq(instance->irq, instance);
412fail_irq:
413 NCR5380_exit(instance);
414fail_init:
415 scsi_host_put(instance);
416 return error;
417}
418
419static int __exit mac_scsi_remove(struct platform_device *pdev)
420{
421 struct Scsi_Host *instance = platform_get_drvdata(pdev);
422
423 scsi_remove_host(instance);
424 if (instance->irq != NO_IRQ)
425 free_irq(instance->irq, instance);
426 NCR5380_exit(instance);
427 scsi_host_put(instance);
428 return 0;
429}
430
431static struct platform_driver mac_scsi_driver = {
432 .remove = __exit_p(mac_scsi_remove),
433 .driver = {
434 .name = DRV_MODULE_NAME,
435 },
436};
437
438module_platform_driver_probe(mac_scsi_driver, mac_scsi_probe);
439
440MODULE_ALIAS("platform:" DRV_MODULE_NAME);
441MODULE_LICENSE("GPL");
442
