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16#include <linux/module.h>
17#include <linux/blkdev.h>
18#include <linux/kernel.h>
19#include <linux/string.h>
20#include <linux/ioport.h>
21#include <linux/proc_fs.h>
22#include <linux/delay.h>
23#include <linux/interrupt.h>
24#include <linux/init.h>
25#include <linux/dma-mapping.h>
26#include <linux/pgtable.h>
27
28#include <asm/dma.h>
29#include <asm/ecard.h>
30#include <asm/io.h>
31
32#include <scsi/scsi.h>
33#include <scsi/scsi_cmnd.h>
34#include <scsi/scsi_device.h>
35#include <scsi/scsi_eh.h>
36#include <scsi/scsi_host.h>
37#include <scsi/scsi_tcq.h>
38#include "fas216.h"
39#include "arm_scsi.h"
40
41#include <scsi/scsicam.h>
42
43#define CUMANASCSI2_STATUS (0x0000)
44#define STATUS_INT (1 << 0)
45#define STATUS_DRQ (1 << 1)
46#define STATUS_LATCHED (1 << 3)
47
48#define CUMANASCSI2_ALATCH (0x0014)
49#define ALATCH_ENA_INT (3)
50#define ALATCH_DIS_INT (2)
51#define ALATCH_ENA_TERM (5)
52#define ALATCH_DIS_TERM (4)
53#define ALATCH_ENA_BIT32 (11)
54#define ALATCH_DIS_BIT32 (10)
55#define ALATCH_ENA_DMA (13)
56#define ALATCH_DIS_DMA (12)
57#define ALATCH_DMA_OUT (15)
58#define ALATCH_DMA_IN (14)
59
60#define CUMANASCSI2_PSEUDODMA (0x0200)
61
62#define CUMANASCSI2_FAS216_OFFSET (0x0300)
63#define CUMANASCSI2_FAS216_SHIFT 2
64
65
66
67
68#define VERSION "1.00 (13/11/2002 2.5.47)"
69
70
71
72
73static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 };
74
75#define NR_SG 256
76
77struct cumanascsi2_info {
78 FAS216_Info info;
79 struct expansion_card *ec;
80 void __iomem *base;
81 unsigned int terms;
82 struct scatterlist sg[NR_SG];
83};
84
85#define CSTATUS_IRQ (1 << 0)
86#define CSTATUS_DRQ (1 << 1)
87
88
89
90
91
92
93static void
94cumanascsi_2_irqenable(struct expansion_card *ec, int irqnr)
95{
96 struct cumanascsi2_info *info = ec->irq_data;
97 writeb(ALATCH_ENA_INT, info->base + CUMANASCSI2_ALATCH);
98}
99
100
101
102
103
104
105static void
106cumanascsi_2_irqdisable(struct expansion_card *ec, int irqnr)
107{
108 struct cumanascsi2_info *info = ec->irq_data;
109 writeb(ALATCH_DIS_INT, info->base + CUMANASCSI2_ALATCH);
110}
111
112static const expansioncard_ops_t cumanascsi_2_ops = {
113 .irqenable = cumanascsi_2_irqenable,
114 .irqdisable = cumanascsi_2_irqdisable,
115};
116
117
118
119
120
121
122static void
123cumanascsi_2_terminator_ctl(struct Scsi_Host *host, int on_off)
124{
125 struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
126
127 if (on_off) {
128 info->terms = 1;
129 writeb(ALATCH_ENA_TERM, info->base + CUMANASCSI2_ALATCH);
130 } else {
131 info->terms = 0;
132 writeb(ALATCH_DIS_TERM, info->base + CUMANASCSI2_ALATCH);
133 }
134}
135
136
137
138
139
140
141static irqreturn_t
142cumanascsi_2_intr(int irq, void *dev_id)
143{
144 struct cumanascsi2_info *info = dev_id;
145
146 return fas216_intr(&info->info);
147}
148
149
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151
152
153
154
155
156
157static fasdmatype_t
158cumanascsi_2_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
159 fasdmadir_t direction, fasdmatype_t min_type)
160{
161 struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
162 struct device *dev = scsi_get_device(host);
163 int dmach = info->info.scsi.dma;
164
165 writeb(ALATCH_DIS_DMA, info->base + CUMANASCSI2_ALATCH);
166
167 if (dmach != NO_DMA &&
168 (min_type == fasdma_real_all || SCp->this_residual >= 512)) {
169 int bufs, map_dir, dma_dir, alatch_dir;
170
171 bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG);
172
173 if (direction == DMA_OUT) {
174 map_dir = DMA_TO_DEVICE;
175 dma_dir = DMA_MODE_WRITE;
176 alatch_dir = ALATCH_DMA_OUT;
177 } else {
178 map_dir = DMA_FROM_DEVICE;
179 dma_dir = DMA_MODE_READ;
180 alatch_dir = ALATCH_DMA_IN;
181 }
182
183 dma_map_sg(dev, info->sg, bufs, map_dir);
184
185 disable_dma(dmach);
186 set_dma_sg(dmach, info->sg, bufs);
187 writeb(alatch_dir, info->base + CUMANASCSI2_ALATCH);
188 set_dma_mode(dmach, dma_dir);
189 enable_dma(dmach);
190 writeb(ALATCH_ENA_DMA, info->base + CUMANASCSI2_ALATCH);
191 writeb(ALATCH_DIS_BIT32, info->base + CUMANASCSI2_ALATCH);
192 return fasdma_real_all;
193 }
194
195
196
197
198
199 return fasdma_pio;
200}
201
202
203
204
205
206
207
208
209
210static void
211cumanascsi_2_dma_pseudo(struct Scsi_Host *host, struct scsi_pointer *SCp,
212 fasdmadir_t direction, int transfer)
213{
214 struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
215 unsigned int length;
216 unsigned char *addr;
217
218 length = SCp->this_residual;
219 addr = SCp->ptr;
220
221 if (direction == DMA_OUT)
222#if 0
223 while (length > 1) {
224 unsigned long word;
225 unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
226
227 if (status & STATUS_INT)
228 goto end;
229
230 if (!(status & STATUS_DRQ))
231 continue;
232
233 word = *addr | *(addr + 1) << 8;
234 writew(word, info->base + CUMANASCSI2_PSEUDODMA);
235 addr += 2;
236 length -= 2;
237 }
238#else
239 printk ("PSEUDO_OUT???\n");
240#endif
241 else {
242 if (transfer && (transfer & 255)) {
243 while (length >= 256) {
244 unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
245
246 if (status & STATUS_INT)
247 return;
248
249 if (!(status & STATUS_DRQ))
250 continue;
251
252 readsw(info->base + CUMANASCSI2_PSEUDODMA,
253 addr, 256 >> 1);
254 addr += 256;
255 length -= 256;
256 }
257 }
258
259 while (length > 0) {
260 unsigned long word;
261 unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
262
263 if (status & STATUS_INT)
264 return;
265
266 if (!(status & STATUS_DRQ))
267 continue;
268
269 word = readw(info->base + CUMANASCSI2_PSEUDODMA);
270 *addr++ = word;
271 if (--length > 0) {
272 *addr++ = word >> 8;
273 length --;
274 }
275 }
276 }
277}
278
279
280
281
282
283
284static void
285cumanascsi_2_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp)
286{
287 struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
288 if (info->info.scsi.dma != NO_DMA) {
289 writeb(ALATCH_DIS_DMA, info->base + CUMANASCSI2_ALATCH);
290 disable_dma(info->info.scsi.dma);
291 }
292}
293
294
295
296
297
298
299const char *cumanascsi_2_info(struct Scsi_Host *host)
300{
301 struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
302 static char string[150];
303
304 sprintf(string, "%s (%s) in slot %d v%s terminators o%s",
305 host->hostt->name, info->info.scsi.type, info->ec->slot_no,
306 VERSION, info->terms ? "n" : "ff");
307
308 return string;
309}
310
311
312
313
314
315
316
317
318static int
319cumanascsi_2_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
320{
321 int ret = length;
322
323 if (length >= 11 && strncmp(buffer, "CUMANASCSI2", 11) == 0) {
324 buffer += 11;
325 length -= 11;
326
327 if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
328 if (buffer[5] == '1')
329 cumanascsi_2_terminator_ctl(host, 1);
330 else if (buffer[5] == '0')
331 cumanascsi_2_terminator_ctl(host, 0);
332 else
333 ret = -EINVAL;
334 } else {
335 ret = -EINVAL;
336 }
337 } else {
338 ret = -EINVAL;
339 }
340
341 return ret;
342}
343
344static int cumanascsi_2_show_info(struct seq_file *m, struct Scsi_Host *host)
345{
346 struct cumanascsi2_info *info;
347 info = (struct cumanascsi2_info *)host->hostdata;
348
349 seq_printf(m, "Cumana SCSI II driver v%s\n", VERSION);
350 fas216_print_host(&info->info, m);
351 seq_printf(m, "Term : o%s\n",
352 info->terms ? "n" : "ff");
353
354 fas216_print_stats(&info->info, m);
355 fas216_print_devices(&info->info, m);
356 return 0;
357}
358
359static struct scsi_host_template cumanascsi2_template = {
360 .module = THIS_MODULE,
361 .show_info = cumanascsi_2_show_info,
362 .write_info = cumanascsi_2_set_proc_info,
363 .name = "Cumana SCSI II",
364 .info = cumanascsi_2_info,
365 .queuecommand = fas216_queue_command,
366 .eh_host_reset_handler = fas216_eh_host_reset,
367 .eh_bus_reset_handler = fas216_eh_bus_reset,
368 .eh_device_reset_handler = fas216_eh_device_reset,
369 .eh_abort_handler = fas216_eh_abort,
370 .cmd_size = sizeof(struct fas216_cmd_priv),
371 .can_queue = 1,
372 .this_id = 7,
373 .sg_tablesize = SG_MAX_SEGMENTS,
374 .dma_boundary = IOMD_DMA_BOUNDARY,
375 .proc_name = "cumanascsi2",
376};
377
378static int cumanascsi2_probe(struct expansion_card *ec,
379 const struct ecard_id *id)
380{
381 struct Scsi_Host *host;
382 struct cumanascsi2_info *info;
383 void __iomem *base;
384 int ret;
385
386 ret = ecard_request_resources(ec);
387 if (ret)
388 goto out;
389
390 base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
391 if (!base) {
392 ret = -ENOMEM;
393 goto out_region;
394 }
395
396 host = scsi_host_alloc(&cumanascsi2_template,
397 sizeof(struct cumanascsi2_info));
398 if (!host) {
399 ret = -ENOMEM;
400 goto out_region;
401 }
402
403 ecard_set_drvdata(ec, host);
404
405 info = (struct cumanascsi2_info *)host->hostdata;
406 info->ec = ec;
407 info->base = base;
408
409 cumanascsi_2_terminator_ctl(host, term[ec->slot_no]);
410
411 info->info.scsi.io_base = base + CUMANASCSI2_FAS216_OFFSET;
412 info->info.scsi.io_shift = CUMANASCSI2_FAS216_SHIFT;
413 info->info.scsi.irq = ec->irq;
414 info->info.scsi.dma = ec->dma;
415 info->info.ifcfg.clockrate = 40;
416 info->info.ifcfg.select_timeout = 255;
417 info->info.ifcfg.asyncperiod = 200;
418 info->info.ifcfg.sync_max_depth = 7;
419 info->info.ifcfg.cntl3 = CNTL3_BS8 | CNTL3_FASTSCSI | CNTL3_FASTCLK;
420 info->info.ifcfg.disconnect_ok = 1;
421 info->info.ifcfg.wide_max_size = 0;
422 info->info.ifcfg.capabilities = FASCAP_PSEUDODMA;
423 info->info.dma.setup = cumanascsi_2_dma_setup;
424 info->info.dma.pseudo = cumanascsi_2_dma_pseudo;
425 info->info.dma.stop = cumanascsi_2_dma_stop;
426
427 ec->irqaddr = info->base + CUMANASCSI2_STATUS;
428 ec->irqmask = STATUS_INT;
429
430 ecard_setirq(ec, &cumanascsi_2_ops, info);
431
432 ret = fas216_init(host);
433 if (ret)
434 goto out_free;
435
436 ret = request_irq(ec->irq, cumanascsi_2_intr,
437 0, "cumanascsi2", info);
438 if (ret) {
439 printk("scsi%d: IRQ%d not free: %d\n",
440 host->host_no, ec->irq, ret);
441 goto out_release;
442 }
443
444 if (info->info.scsi.dma != NO_DMA) {
445 if (request_dma(info->info.scsi.dma, "cumanascsi2")) {
446 printk("scsi%d: DMA%d not free, using PIO\n",
447 host->host_no, info->info.scsi.dma);
448 info->info.scsi.dma = NO_DMA;
449 } else {
450 set_dma_speed(info->info.scsi.dma, 180);
451 info->info.ifcfg.capabilities |= FASCAP_DMA;
452 }
453 }
454
455 ret = fas216_add(host, &ec->dev);
456 if (ret == 0)
457 goto out;
458
459 if (info->info.scsi.dma != NO_DMA)
460 free_dma(info->info.scsi.dma);
461 free_irq(ec->irq, info);
462
463 out_release:
464 fas216_release(host);
465
466 out_free:
467 scsi_host_put(host);
468
469 out_region:
470 ecard_release_resources(ec);
471
472 out:
473 return ret;
474}
475
476static void cumanascsi2_remove(struct expansion_card *ec)
477{
478 struct Scsi_Host *host = ecard_get_drvdata(ec);
479 struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
480
481 ecard_set_drvdata(ec, NULL);
482 fas216_remove(host);
483
484 if (info->info.scsi.dma != NO_DMA)
485 free_dma(info->info.scsi.dma);
486 free_irq(ec->irq, info);
487
488 fas216_release(host);
489 scsi_host_put(host);
490 ecard_release_resources(ec);
491}
492
493static const struct ecard_id cumanascsi2_cids[] = {
494 { MANU_CUMANA, PROD_CUMANA_SCSI_2 },
495 { 0xffff, 0xffff },
496};
497
498static struct ecard_driver cumanascsi2_driver = {
499 .probe = cumanascsi2_probe,
500 .remove = cumanascsi2_remove,
501 .id_table = cumanascsi2_cids,
502 .drv = {
503 .name = "cumanascsi2",
504 },
505};
506
507static int __init cumanascsi2_init(void)
508{
509 return ecard_register_driver(&cumanascsi2_driver);
510}
511
512static void __exit cumanascsi2_exit(void)
513{
514 ecard_remove_driver(&cumanascsi2_driver);
515}
516
517module_init(cumanascsi2_init);
518module_exit(cumanascsi2_exit);
519
520MODULE_AUTHOR("Russell King");
521MODULE_DESCRIPTION("Cumana SCSI-2 driver for Acorn machines");
522module_param_array(term, int, NULL, 0);
523MODULE_PARM_DESC(term, "SCSI bus termination");
524MODULE_LICENSE("GPL");
525
