]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - drivers/scsi/mac_scsi.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
scsi: ncr5380: Use correct types for device register accessors
[mirror_ubuntu-bionic-kernel.git] / drivers / scsi / mac_scsi.c
CommitLineData
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
820682b1 31#define NCR5380_implementation_fields int pdma_residual
92de3831 32
61e1ce58
FT		 33#define NCR5380_read(reg) in_8(hostdata->io + ((reg) << 4))
34#define NCR5380_write(reg, value) out_8(hostdata->io + ((reg) << 4), 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
3a0f64bf 40#define NCR5380_dma_residual(instance) (hostdata->pdma_residual)
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 50static int setup_can_queue = -1;
6e9ae6d5 51module_param(setup_can_queue, int, 0);
1da177e4 52static int setup_cmd_per_lun = -1;
6e9ae6d5 53module_param(setup_cmd_per_lun, int, 0);
1da177e4 54static int setup_sg_tablesize = -1;
6e9ae6d5 55module_param(setup_sg_tablesize, int, 0);
1da177e4 56static int setup_use_pdma = -1;
6e9ae6d5 57module_param(setup_use_pdma, int, 0);
1da177e4 58static int setup_hostid = -1;
6e9ae6d5 59module_param(setup_hostid, int, 0);
9c3f0e2b
FT		 60static int setup_toshiba_delay = -1;
61module_param(setup_toshiba_delay, int, 0);
1da177e4 62
6e9ae6d5
FT		 63#ifndef MODULE
64static int __init mac_scsi_setup(char *str)
65{
9c3f0e2b 66 int ints[8];
6e9ae6d5
FT		 67
68 (void)get_options(str, ARRAY_SIZE(ints), ints);
69
9c3f0e2b
FT		 70 if (ints[0] < 1) {
71 pr_err("Usage: mac5380=<can_queue>[,<cmd_per_lun>[,<sg_tablesize>[,<hostid>[,<use_tags>[,<use_pdma>[,<toshiba_delay>]]]]]]\n");
6e9ae6d5 72 return 0;
1da177e4 73 }
6e9ae6d5
FT		 74 if (ints[0] >= 1)
75 setup_can_queue = ints[1];
76 if (ints[0] >= 2)
77 setup_cmd_per_lun = ints[2];
78 if (ints[0] >= 3)
79 setup_sg_tablesize = ints[3];
80 if (ints[0] >= 4)
81 setup_hostid = ints[4];
c4ec6f92 82 /* ints[5] (use_tagged_queuing) is ignored */
6e9ae6d5 83 if (ints[0] >= 6)
1da177e4 84 setup_use_pdma = ints[6];
9c3f0e2b
FT		 85 if (ints[0] >= 7)
86 setup_toshiba_delay = ints[7];
1da177e4
LT		 87 return 1;
88}
89
90__setup("mac5380=", mac_scsi_setup);
6e9ae6d5 91#endif /* !MODULE */
1da177e4 92
3a0f64bf
FT		 93/* Pseudo DMA asm originally by Ove Edlund */
94
95#define CP_IO_TO_MEM(s,d,n) \
1da177e4
LT		 96__asm__ __volatile__ \
97 (" cmp.w #4,%2\n" \
98 " bls 8f\n" \
99 " move.w %1,%%d0\n" \
100 " neg.b %%d0\n" \
101 " and.w #3,%%d0\n" \
102 " sub.w %%d0,%2\n" \
103 " bra 2f\n" \
104 " 1: move.b (%0),(%1)+\n" \
105 " 2: dbf %%d0,1b\n" \
106 " move.w %2,%%d0\n" \
107 " lsr.w #5,%%d0\n" \
108 " bra 4f\n" \
109 " 3: move.l (%0),(%1)+\n" \
110 "31: move.l (%0),(%1)+\n" \
111 "32: move.l (%0),(%1)+\n" \
112 "33: move.l (%0),(%1)+\n" \
113 "34: move.l (%0),(%1)+\n" \
114 "35: move.l (%0),(%1)+\n" \
115 "36: move.l (%0),(%1)+\n" \
116 "37: move.l (%0),(%1)+\n" \
117 " 4: dbf %%d0,3b\n" \
118 " move.w %2,%%d0\n" \
119 " lsr.w #2,%%d0\n" \
120 " and.w #7,%%d0\n" \
121 " bra 6f\n" \
122 " 5: move.l (%0),(%1)+\n" \
123 " 6: dbf %%d0,5b\n" \
124 " and.w #3,%2\n" \
125 " bra 8f\n" \
126 " 7: move.b (%0),(%1)+\n" \
127 " 8: dbf %2,7b\n" \
128 " moveq.l #0, %2\n" \
129 " 9: \n" \
130 ".section .fixup,\"ax\"\n" \
131 " .even\n" \
3a0f64bf
FT		 132 "91: moveq.l #1, %2\n" \
133 " jra 9b\n" \
134 "94: moveq.l #4, %2\n" \
1da177e4
LT		 135 " jra 9b\n" \
136 ".previous\n" \
137 ".section __ex_table,\"a\"\n" \
138 " .align 4\n" \
3a0f64bf
FT		 139 " .long 1b,91b\n" \
140 " .long 3b,94b\n" \
141 " .long 31b,94b\n" \
142 " .long 32b,94b\n" \
143 " .long 33b,94b\n" \
144 " .long 34b,94b\n" \
145 " .long 35b,94b\n" \
146 " .long 36b,94b\n" \
147 " .long 37b,94b\n" \
148 " .long 5b,94b\n" \
149 " .long 7b,91b\n" \
1da177e4 150 ".previous" \
3a0f64bf
FT		 151 : "=a"(s), "=a"(d), "=d"(n) \
152 : "0"(s), "1"(d), "2"(n) \
1da177e4
LT		 153 : "d0")
154
ffdede67
FT		 155static int macscsi_pread(struct Scsi_Host *instance,
156 unsigned char *dst, int len)
1da177e4 157{
cbad48de 158 struct NCR5380_hostdata *hostdata = shost_priv(instance);
820682b1 159 unsigned char *s = hostdata->pdma_io + (INPUT_DATA_REG << 4);
3a0f64bf
FT		 160 unsigned char *d = dst;
161 int n = len;
162 int transferred;
163
164 while (!NCR5380_poll_politely(instance, BUS_AND_STATUS_REG,
165 BASR_DRQ | BASR_PHASE_MATCH,
166 BASR_DRQ | BASR_PHASE_MATCH, HZ / 64)) {
167 CP_IO_TO_MEM(s, d, n);
168
169 transferred = d - dst - n;
170 hostdata->pdma_residual = len - transferred;
171
172 /* No bus error. */
173 if (n == 0)
174 return 0;
175
176 /* Target changed phase early? */
177 if (NCR5380_poll_politely2(instance, STATUS_REG, SR_REQ, SR_REQ,
178 BUS_AND_STATUS_REG, BASR_ACK, BASR_ACK, HZ / 64) < 0)
179 scmd_printk(KERN_ERR, hostdata->connected,
180 "%s: !REQ and !ACK\n", __func__);
181 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH))
182 return 0;
183
184 dsprintk(NDEBUG_PSEUDO_DMA, instance,
185 "%s: bus error (%d/%d)\n", __func__, transferred, len);
186 NCR5380_dprint(NDEBUG_PSEUDO_DMA, instance);
187 d = dst + transferred;
188 n = len - transferred;
ffdede67
FT		 189 }
190
3a0f64bf
FT		 191 scmd_printk(KERN_ERR, hostdata->connected,
192 "%s: phase mismatch or !DRQ\n", __func__);
193 NCR5380_dprint(NDEBUG_PSEUDO_DMA, instance);
194 return -1;
1da177e4
LT		 195}
196
197
3a0f64bf 198#define CP_MEM_TO_IO(s,d,n) \
1da177e4
LT		 199__asm__ __volatile__ \
200 (" cmp.w #4,%2\n" \
201 " bls 8f\n" \
202 " move.w %0,%%d0\n" \
203 " neg.b %%d0\n" \
204 " and.w #3,%%d0\n" \
205 " sub.w %%d0,%2\n" \
206 " bra 2f\n" \
207 " 1: move.b (%0)+,(%1)\n" \
208 " 2: dbf %%d0,1b\n" \
209 " move.w %2,%%d0\n" \
210 " lsr.w #5,%%d0\n" \
211 " bra 4f\n" \
212 " 3: move.l (%0)+,(%1)\n" \
213 "31: move.l (%0)+,(%1)\n" \
214 "32: move.l (%0)+,(%1)\n" \
215 "33: move.l (%0)+,(%1)\n" \
216 "34: move.l (%0)+,(%1)\n" \
217 "35: move.l (%0)+,(%1)\n" \
218 "36: move.l (%0)+,(%1)\n" \
219 "37: move.l (%0)+,(%1)\n" \
220 " 4: dbf %%d0,3b\n" \
221 " move.w %2,%%d0\n" \
222 " lsr.w #2,%%d0\n" \
223 " and.w #7,%%d0\n" \
224 " bra 6f\n" \
225 " 5: move.l (%0)+,(%1)\n" \
226 " 6: dbf %%d0,5b\n" \
227 " and.w #3,%2\n" \
228 " bra 8f\n" \
229 " 7: move.b (%0)+,(%1)\n" \
230 " 8: dbf %2,7b\n" \
231 " moveq.l #0, %2\n" \
232 " 9: \n" \
233 ".section .fixup,\"ax\"\n" \
234 " .even\n" \
3a0f64bf
FT		 235 "91: moveq.l #1, %2\n" \
236 " jra 9b\n" \
237 "94: moveq.l #4, %2\n" \
1da177e4
LT		 238 " jra 9b\n" \
239 ".previous\n" \
240 ".section __ex_table,\"a\"\n" \
241 " .align 4\n" \
3a0f64bf
FT		 242 " .long 1b,91b\n" \
243 " .long 3b,94b\n" \
244 " .long 31b,94b\n" \
245 " .long 32b,94b\n" \
246 " .long 33b,94b\n" \
247 " .long 34b,94b\n" \
248 " .long 35b,94b\n" \
249 " .long 36b,94b\n" \
250 " .long 37b,94b\n" \
251 " .long 5b,94b\n" \
252 " .long 7b,91b\n" \
1da177e4 253 ".previous" \
3a0f64bf
FT		 254 : "=a"(s), "=a"(d), "=d"(n) \
255 : "0"(s), "1"(d), "2"(n) \
1da177e4
LT		 256 : "d0")
257
ffdede67
FT		 258static int macscsi_pwrite(struct Scsi_Host *instance,
259 unsigned char *src, int len)
1da177e4 260{
cbad48de 261 struct NCR5380_hostdata *hostdata = shost_priv(instance);
3a0f64bf 262 unsigned char *s = src;
820682b1 263 unsigned char *d = hostdata->pdma_io + (OUTPUT_DATA_REG << 4);
3a0f64bf
FT		 264 int n = len;
265 int transferred;
266
267 while (!NCR5380_poll_politely(instance, BUS_AND_STATUS_REG,
268 BASR_DRQ | BASR_PHASE_MATCH,
269 BASR_DRQ | BASR_PHASE_MATCH, HZ / 64)) {
270 CP_MEM_TO_IO(s, d, n);
271
272 transferred = s - src - n;
273 hostdata->pdma_residual = len - transferred;
274
275 /* Target changed phase early? */
276 if (NCR5380_poll_politely2(instance, STATUS_REG, SR_REQ, SR_REQ,
277 BUS_AND_STATUS_REG, BASR_ACK, BASR_ACK, HZ / 64) < 0)
278 scmd_printk(KERN_ERR, hostdata->connected,
279 "%s: !REQ and !ACK\n", __func__);
280 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH))
281 return 0;
282
283 /* No bus error. */
284 if (n == 0) {
285 if (NCR5380_poll_politely(instance, TARGET_COMMAND_REG,
286 TCR_LAST_BYTE_SENT,
287 TCR_LAST_BYTE_SENT, HZ / 64) < 0)
288 scmd_printk(KERN_ERR, hostdata->connected,
289 "%s: Last Byte Sent timeout\n", __func__);
290 return 0;
291 }
292
293 dsprintk(NDEBUG_PSEUDO_DMA, instance,
294 "%s: bus error (%d/%d)\n", __func__, transferred, len);
295 NCR5380_dprint(NDEBUG_PSEUDO_DMA, instance);
296 s = src + transferred;
297 n = len - transferred;
ffdede67
FT		 298 }
299
3a0f64bf
FT		 300 scmd_printk(KERN_ERR, hostdata->connected,
301 "%s: phase mismatch or !DRQ\n", __func__);
302 NCR5380_dprint(NDEBUG_PSEUDO_DMA, instance);
ffdede67 303
3a0f64bf 304 return -1;
ffdede67 305}
1da177e4 306
7e9ec8d9
FT		 307static int macscsi_dma_xfer_len(struct Scsi_Host *instance,
308 struct scsi_cmnd *cmd)
309{
310 struct NCR5380_hostdata *hostdata = shost_priv(instance);
311
3a0f64bf
FT		 312 if (hostdata->flags & FLAG_NO_PSEUDO_DMA ||
313 cmd->SCp.this_residual < 16)
7e9ec8d9
FT		 314 return 0;
315
3a0f64bf 316 return cmd->SCp.this_residual;
7e9ec8d9
FT		 317}
318
1da177e4
LT		 319#include "NCR5380.c"
320
cbad48de
FT		 321#define DRV_MODULE_NAME "mac_scsi"
322#define PFX DRV_MODULE_NAME ": "
323
324static struct scsi_host_template mac_scsi_template = {
aa2e2cb1
FT		 325 .module = THIS_MODULE,
326 .proc_name = DRV_MODULE_NAME,
aa2e2cb1
FT		 327 .name = "Macintosh NCR5380 SCSI",
328 .info = macscsi_info,
329 .queuecommand = macscsi_queue_command,
330 .eh_abort_handler = macscsi_abort,
331 .eh_bus_reset_handler = macscsi_bus_reset,
332 .can_queue = 16,
333 .this_id = 7,
3a0f64bf 334 .sg_tablesize = 1,
aa2e2cb1
FT		 335 .cmd_per_lun = 2,
336 .use_clustering = DISABLE_CLUSTERING,
32b26a10 337 .cmd_size = NCR5380_CMD_SIZE,
0a4e3612 338 .max_sectors = 128,
1da177e4
LT		 339};
340
cbad48de
FT		 341static int __init mac_scsi_probe(struct platform_device *pdev)
342{
343 struct Scsi_Host *instance;
820682b1 344 struct NCR5380_hostdata *hostdata;
cbad48de
FT		 345 int error;
346 int host_flags = 0;
347 struct resource *irq, *pio_mem, *pdma_mem = NULL;
348
349 pio_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
350 if (!pio_mem)
351 return -ENODEV;
352
cbad48de 353 pdma_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
cbad48de
FT		 354
355 irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
356
357 if (!hwreg_present((unsigned char *)pio_mem->start +
358 (STATUS_REG << 4))) {
359 pr_info(PFX "no device detected at %pap\n", &pio_mem->start);
360 return -ENODEV;
361 }
362
363 if (setup_can_queue > 0)
364 mac_scsi_template.can_queue = setup_can_queue;
365 if (setup_cmd_per_lun > 0)
366 mac_scsi_template.cmd_per_lun = setup_cmd_per_lun;
367 if (setup_sg_tablesize >= 0)
368 mac_scsi_template.sg_tablesize = setup_sg_tablesize;
369 if (setup_hostid >= 0)
370 mac_scsi_template.this_id = setup_hostid & 7;
cbad48de
FT		 371
372 instance = scsi_host_alloc(&mac_scsi_template,
373 sizeof(struct NCR5380_hostdata));
374 if (!instance)
375 return -ENOMEM;
376
cbad48de
FT		 377 if (irq)
378 instance->irq = irq->start;
379 else
380 instance->irq = NO_IRQ;
381
820682b1
FT		 382 hostdata = shost_priv(instance);
383 hostdata->base = pio_mem->start;
384 hostdata->io = (void *)pio_mem->start;
cbad48de 385
820682b1
FT		 386 if (pdma_mem && setup_use_pdma)
387 hostdata->pdma_io = (void *)pdma_mem->start;
388 else
cbad48de
FT		 389 host_flags |= FLAG_NO_PSEUDO_DMA;
390
9c3f0e2b 391 host_flags |= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0;
ca513fc9 392
8053b0ee 393 error = NCR5380_init(instance, host_flags | FLAG_LATE_DMA_SETUP);
0ad0eff9
FT		 394 if (error)
395 goto fail_init;
cbad48de
FT		 396
397 if (instance->irq != NO_IRQ) {
398 error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED,
399 "NCR5380", instance);
400 if (error)
401 goto fail_irq;
402 }
403
9c3f0e2b
FT		 404 NCR5380_maybe_reset_bus(instance);
405
cbad48de
FT		 406 error = scsi_add_host(instance, NULL);
407 if (error)
408 goto fail_host;
409
410 platform_set_drvdata(pdev, instance);
411
412 scsi_scan_host(instance);
413 return 0;
414
415fail_host:
416 if (instance->irq != NO_IRQ)
417 free_irq(instance->irq, instance);
418fail_irq:
419 NCR5380_exit(instance);
0ad0eff9 420fail_init:
cbad48de
FT		 421 scsi_host_put(instance);
422 return error;
423}
424
425static int __exit mac_scsi_remove(struct platform_device *pdev)
426{
427 struct Scsi_Host *instance = platform_get_drvdata(pdev);
428
429 scsi_remove_host(instance);
430 if (instance->irq != NO_IRQ)
431 free_irq(instance->irq, instance);
432 NCR5380_exit(instance);
433 scsi_host_put(instance);
434 return 0;
435}
436
437static struct platform_driver mac_scsi_driver = {
438 .remove = __exit_p(mac_scsi_remove),
439 .driver = {
440 .name = DRV_MODULE_NAME,
cbad48de
FT		 441 },
442};
1da177e4 443
cbad48de 444module_platform_driver_probe(mac_scsi_driver, mac_scsi_probe);
6e9ae6d5 445
cbad48de 446MODULE_ALIAS("platform:" DRV_MODULE_NAME);
6e9ae6d5 447MODULE_LICENSE("GPL");
ubuntu-bionic-kernel mirror