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MOXA linux-2.6.x / linux-2.6.9-uc0 from sdlinux-moxaart.tgz
[linux-2.6.9-moxart.git] / drivers / ide / arm / icside.c
blobedc9de780165121cdfc4613bb19d7f03e990faaf
1 /*
2 * linux/drivers/ide/arm/icside.c
3 *
4 * Copyright (c) 1996-2003 Russell King.
5 */
6
7 #include <linux/config.h>
8 #include <linux/string.h>
9 #include <linux/module.h>
10 #include <linux/ioport.h>
11 #include <linux/slab.h>
12 #include <linux/blkdev.h>
13 #include <linux/errno.h>
14 #include <linux/hdreg.h>
15 #include <linux/ide.h>
16 #include <linux/dma-mapping.h>
17 #include <linux/device.h>
18 #include <linux/init.h>
19
20 #include <asm/dma.h>
21 #include <asm/ecard.h>
22 #include <asm/io.h>
23
24 #define ICS_IDENT_OFFSET 0x2280
25
26 #define ICS_ARCIN_V5_INTRSTAT 0x000
27 #define ICS_ARCIN_V5_INTROFFSET 0x001
28 #define ICS_ARCIN_V5_IDEOFFSET 0xa00
29 #define ICS_ARCIN_V5_IDEALTOFFSET 0xae0
30 #define ICS_ARCIN_V5_IDESTEPPING 4
31
32 #define ICS_ARCIN_V6_IDEOFFSET_1 0x800
33 #define ICS_ARCIN_V6_INTROFFSET_1 0x880
34 #define ICS_ARCIN_V6_INTRSTAT_1 0x8a4
35 #define ICS_ARCIN_V6_IDEALTOFFSET_1 0x8e0
36 #define ICS_ARCIN_V6_IDEOFFSET_2 0xc00
37 #define ICS_ARCIN_V6_INTROFFSET_2 0xc80
38 #define ICS_ARCIN_V6_INTRSTAT_2 0xca4
39 #define ICS_ARCIN_V6_IDEALTOFFSET_2 0xce0
40 #define ICS_ARCIN_V6_IDESTEPPING 4
41
42 struct cardinfo {
43 unsigned int dataoffset;
44 unsigned int ctrloffset;
45 unsigned int stepping;
46 };
47
48 static struct cardinfo icside_cardinfo_v5 = {
49 ICS_ARCIN_V5_IDEOFFSET,
50 ICS_ARCIN_V5_IDEALTOFFSET,
51 ICS_ARCIN_V5_IDESTEPPING
52 };
53
54 static struct cardinfo icside_cardinfo_v6_1 = {
55 ICS_ARCIN_V6_IDEOFFSET_1,
56 ICS_ARCIN_V6_IDEALTOFFSET_1,
57 ICS_ARCIN_V6_IDESTEPPING
58 };
59
60 static struct cardinfo icside_cardinfo_v6_2 = {
61 ICS_ARCIN_V6_IDEOFFSET_2,
62 ICS_ARCIN_V6_IDEALTOFFSET_2,
63 ICS_ARCIN_V6_IDESTEPPING
64 };
65
66 struct icside_state {
67 unsigned int channel;
68 unsigned int enabled;
69 unsigned long irq_port;
70 unsigned long slot_port;
71 unsigned int type;
72 /* parent device... until the IDE core gets one of its own */
73 struct device *dev;
74 ide_hwif_t *hwif[2];
75 };
76
77 #define ICS_TYPE_A3IN 0
78 #define ICS_TYPE_A3USER 1
79 #define ICS_TYPE_V6 3
80 #define ICS_TYPE_V5 15
81 #define ICS_TYPE_NOTYPE ((unsigned int)-1)
82
83 /* ---------------- Version 5 PCB Support Functions --------------------- */
84 /* Prototype: icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
85 * Purpose : enable interrupts from card
86 */
87 static void icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
88 {
89 struct icside_state *state = ec->irq_data;
90 unsigned int base = state->irq_port;
91
92 outb(0, base + ICS_ARCIN_V5_INTROFFSET);
93 }
94
95 /* Prototype: icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
96 * Purpose : disable interrupts from card
97 */
98 static void icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
99 {
100 struct icside_state *state = ec->irq_data;
101 unsigned int base = state->irq_port;
102
103 inb(base + ICS_ARCIN_V5_INTROFFSET);
104 }
105
106 static const expansioncard_ops_t icside_ops_arcin_v5 = {
107 .irqenable = icside_irqenable_arcin_v5,
108 .irqdisable = icside_irqdisable_arcin_v5,
109 };
110
111
112 /* ---------------- Version 6 PCB Support Functions --------------------- */
113 /* Prototype: icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
114 * Purpose : enable interrupts from card
115 */
116 static void icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
117 {
118 struct icside_state *state = ec->irq_data;
119 unsigned int base = state->irq_port;
120
121 state->enabled = 1;
122
123 switch (state->channel) {
124 case 0:
125 outb(0, base + ICS_ARCIN_V6_INTROFFSET_1);
126 inb(base + ICS_ARCIN_V6_INTROFFSET_2);
127 break;
128 case 1:
129 outb(0, base + ICS_ARCIN_V6_INTROFFSET_2);
130 inb(base + ICS_ARCIN_V6_INTROFFSET_1);
131 break;
132 }
133 }
134
135 /* Prototype: icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
136 * Purpose : disable interrupts from card
137 */
138 static void icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
139 {
140 struct icside_state *state = ec->irq_data;
141
142 state->enabled = 0;
143
144 inb (state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
145 inb (state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
146 }
147
148 /* Prototype: icside_irqprobe(struct expansion_card *ec)
149 * Purpose : detect an active interrupt from card
150 */
151 static int icside_irqpending_arcin_v6(struct expansion_card *ec)
152 {
153 struct icside_state *state = ec->irq_data;
154
155 return inb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_1) & 1 ||
156 inb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_2) & 1;
157 }
158
159 static const expansioncard_ops_t icside_ops_arcin_v6 = {
160 .irqenable = icside_irqenable_arcin_v6,
161 .irqdisable = icside_irqdisable_arcin_v6,
162 .irqpending = icside_irqpending_arcin_v6,
163 };
164
165 /*
166 * Handle routing of interrupts. This is called before
167 * we write the command to the drive.
168 */
169 static void icside_maskproc(ide_drive_t *drive, int mask)
170 {
171 ide_hwif_t *hwif = HWIF(drive);
172 struct icside_state *state = hwif->hwif_data;
173 unsigned long flags;
174
175 local_irq_save(flags);
176
177 state->channel = hwif->channel;
178
179 if (state->enabled && !mask) {
180 switch (hwif->channel) {
181 case 0:
182 outb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
183 inb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
184 break;
185 case 1:
186 outb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
187 inb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
188 break;
189 }
190 } else {
191 inb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
192 inb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
193 }
194
195 local_irq_restore(flags);
196 }
197
198 #ifdef CONFIG_BLK_DEV_IDEDMA_ICS
199 /*
200 * SG-DMA support.
201 *
202 * Similar to the BM-DMA, but we use the RiscPCs IOMD DMA controllers.
203 * There is only one DMA controller per card, which means that only
204 * one drive can be accessed at one time. NOTE! We do not enforce that
205 * here, but we rely on the main IDE driver spotting that both
206 * interfaces use the same IRQ, which should guarantee this.
207 */
208 #define NR_ENTRIES 256
209 #define TABLE_SIZE (NR_ENTRIES * 8)
210
211 static void icside_build_sglist(ide_drive_t *drive, struct request *rq)
212 {
213 ide_hwif_t *hwif = drive->hwif;
214 struct icside_state *state = hwif->hwif_data;
215 struct scatterlist *sg = hwif->sg_table;
216 int nents;
217
218 if (rq->flags & REQ_DRIVE_TASKFILE) {
219 ide_task_t *args = rq->special;
220
221 if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
222 hwif->sg_dma_direction = DMA_TO_DEVICE;
223 else
224 hwif->sg_dma_direction = DMA_FROM_DEVICE;
225
226 memset(sg, 0, sizeof(*sg));
227 sg->page = virt_to_page(rq->buffer);
228 sg->offset = offset_in_page(rq->buffer);
229 sg->length = rq->nr_sectors * SECTOR_SIZE;
230 nents = 1;
231 } else {
232 nents = blk_rq_map_sg(drive->queue, rq, sg);
233
234 if (rq_data_dir(rq) == READ)
235 hwif->sg_dma_direction = DMA_FROM_DEVICE;
236 else
237 hwif->sg_dma_direction = DMA_TO_DEVICE;
238 }
239
240 nents = dma_map_sg(state->dev, sg, nents, hwif->sg_dma_direction);
241
242 hwif->sg_nents = nents;
243 }
244
245
246 /*
247 * Configure the IOMD to give the appropriate timings for the transfer
248 * mode being requested. We take the advice of the ATA standards, and
249 * calculate the cycle time based on the transfer mode, and the EIDE
250 * MW DMA specs that the drive provides in the IDENTIFY command.
251 *
252 * We have the following IOMD DMA modes to choose from:
253 *
254 * Type Active Recovery Cycle
255 * A 250 (250) 312 (550) 562 (800)
256 * B 187 250 437
257 * C 125 (125) 125 (375) 250 (500)
258 * D 62 125 187
259 *
260 * (figures in brackets are actual measured timings)
261 *
262 * However, we also need to take care of the read/write active and
263 * recovery timings:
264 *
265 * Read Write
266 * Mode Active -- Recovery -- Cycle IOMD type
267 * MW0 215 50 215 480 A
268 * MW1 80 50 50 150 C
269 * MW2 70 25 25 120 C
270 */
271 static int icside_set_speed(ide_drive_t *drive, u8 xfer_mode)
272 {
273 int on = 0, cycle_time = 0, use_dma_info = 0;
274
275 /*
276 * Limit the transfer speed to MW_DMA_2.
277 */
278 if (xfer_mode > XFER_MW_DMA_2)
279 xfer_mode = XFER_MW_DMA_2;
280
281 switch (xfer_mode) {
282 case XFER_MW_DMA_2:
283 cycle_time = 250;
284 use_dma_info = 1;
285 break;
286
287 case XFER_MW_DMA_1:
288 cycle_time = 250;
289 use_dma_info = 1;
290 break;
291
292 case XFER_MW_DMA_0:
293 cycle_time = 480;
294 break;
295
296 case XFER_SW_DMA_2:
297 case XFER_SW_DMA_1:
298 case XFER_SW_DMA_0:
299 cycle_time = 480;
300 break;
301 }
302
303 /*
304 * If we're going to be doing MW_DMA_1 or MW_DMA_2, we should
305 * take care to note the values in the ID...
306 */
307 if (use_dma_info && drive->id->eide_dma_time > cycle_time)
308 cycle_time = drive->id->eide_dma_time;
309
310 drive->drive_data = cycle_time;
311
312 if (cycle_time && ide_config_drive_speed(drive, xfer_mode) == 0)
313 on = 1;
314 else
315 drive->drive_data = 480;
316
317 printk("%s: %s selected (peak %dMB/s)\n", drive->name,
318 ide_xfer_verbose(xfer_mode), 2000 / drive->drive_data);
319
320 drive->current_speed = xfer_mode;
321
322 return on;
323 }
324
325 static int icside_dma_host_off(ide_drive_t *drive)
326 {
327 return 0;
328 }
329
330 static int icside_dma_off_quietly(ide_drive_t *drive)
331 {
332 drive->using_dma = 0;
333 return icside_dma_host_off(drive);
334 }
335
336 static int icside_dma_host_on(ide_drive_t *drive)
337 {
338 return 0;
339 }
340
341 static int icside_dma_on(ide_drive_t *drive)
342 {
343 drive->using_dma = 1;
344 return icside_dma_host_on(drive);
345 }
346
347 static int icside_dma_check(ide_drive_t *drive)
348 {
349 struct hd_driveid *id = drive->id;
350 ide_hwif_t *hwif = HWIF(drive);
351 int xfer_mode = XFER_PIO_2;
352 int on;
353
354 if (!(id->capability & 1) || !hwif->autodma)
355 goto out;
356
357 /*
358 * Consult the list of known "bad" drives
359 */
360 if (__ide_dma_bad_drive(drive))
361 goto out;
362
363 /*
364 * Enable DMA on any drive that has multiword DMA
365 */
366 if (id->field_valid & 2) {
367 xfer_mode = ide_dma_speed(drive, 0);
368 goto out;
369 }
370
371 /*
372 * Consult the list of known "good" drives
373 */
374 if (__ide_dma_good_drive(drive)) {
375 if (id->eide_dma_time > 150)
376 goto out;
377 xfer_mode = XFER_MW_DMA_1;
378 }
379
380 out:
381 on = icside_set_speed(drive, xfer_mode);
382
383 if (on)
384 return icside_dma_on(drive);
385 else
386 return icside_dma_off_quietly(drive);
387 }
388
389 static int icside_dma_end(ide_drive_t *drive)
390 {
391 ide_hwif_t *hwif = HWIF(drive);
392 struct icside_state *state = hwif->hwif_data;
393
394 drive->waiting_for_dma = 0;
395
396 disable_dma(hwif->hw.dma);
397
398 /* Teardown mappings after DMA has completed. */
399 dma_unmap_sg(state->dev, hwif->sg_table, hwif->sg_nents,
400 hwif->sg_dma_direction);
401
402 return get_dma_residue(hwif->hw.dma) != 0;
403 }
404
405 static int icside_dma_begin(ide_drive_t *drive)
406 {
407 ide_hwif_t *hwif = HWIF(drive);
408
409 /* We can not enable DMA on both channels simultaneously. */
410 BUG_ON(dma_channel_active(hwif->hw.dma));
411 enable_dma(hwif->hw.dma);
412 return 0;
413 }
414
415 /*
416 * dma_intr() is the handler for disk read/write DMA interrupts
417 */
418 static ide_startstop_t icside_dmaintr(ide_drive_t *drive)
419 {
420 unsigned int stat;
421 int dma_stat;
422
423 dma_stat = icside_dma_end(drive);
424 stat = HWIF(drive)->INB(IDE_STATUS_REG);
425 if (OK_STAT(stat, DRIVE_READY, drive->bad_wstat | DRQ_STAT)) {
426 if (!dma_stat) {
427 struct request *rq = HWGROUP(drive)->rq;
428 int i;
429
430 for (i = rq->nr_sectors; i > 0; ) {
431 i -= rq->current_nr_sectors;
432 DRIVER(drive)->end_request(drive, 1, rq->nr_sectors);
433 }
434
435 return ide_stopped;
436 }
437 printk(KERN_ERR "%s: bad DMA status (dma_stat=%x)\n",
438 drive->name, dma_stat);
439 }
440
441 return DRIVER(drive)->error(drive, __FUNCTION__, stat);
442 }
443
444 static int
445 icside_dma_common(ide_drive_t *drive, struct request *rq,
446 unsigned int dma_mode)
447 {
448 ide_hwif_t *hwif = HWIF(drive);
449
450 /*
451 * We can not enable DMA on both channels.
452 */
453 BUG_ON(dma_channel_active(hwif->hw.dma));
454
455 icside_build_sglist(drive, rq);
456
457 /*
458 * Ensure that we have the right interrupt routed.
459 */
460 icside_maskproc(drive, 0);
461
462 /*
463 * Route the DMA signals to the correct interface.
464 */
465 outb(hwif->select_data, hwif->config_data);
466
467 /*
468 * Select the correct timing for this drive.
469 */
470 set_dma_speed(hwif->hw.dma, drive->drive_data);
471
472 /*
473 * Tell the DMA engine about the SG table and
474 * data direction.
475 */
476 set_dma_sg(hwif->hw.dma, hwif->sg_table, hwif->sg_nents);
477 set_dma_mode(hwif->hw.dma, dma_mode);
478
479 drive->waiting_for_dma = 1;
480
481 return 0;
482 }
483
484 static int icside_dma_read(ide_drive_t *drive)
485 {
486 struct request *rq = HWGROUP(drive)->rq;
487 task_ioreg_t cmd;
488
489 if (icside_dma_common(drive, rq, DMA_MODE_READ))
490 return 1;
491
492 if (drive->media != ide_disk)
493 return 0;
494
495 BUG_ON(HWGROUP(drive)->handler != NULL);
496
497 /*
498 * FIX ME to use only ACB ide_task_t args Struct
499 */
500 #if 0
501 {
502 ide_task_t *args = rq->special;
503 cmd = args->tfRegister[IDE_COMMAND_OFFSET];
504 }
505 #else
506 if (rq->flags & REQ_DRIVE_TASKFILE) {
507 ide_task_t *args = rq->special;
508 cmd = args->tfRegister[IDE_COMMAND_OFFSET];
509 } else if (drive->addressing == 1) {
510 cmd = WIN_READDMA_EXT;
511 } else {
512 cmd = WIN_READDMA;
513 }
514 #endif
515 /* issue cmd to drive */
516 ide_execute_command(drive, cmd, icside_dmaintr, 2*WAIT_CMD, NULL);
517
518 return icside_dma_begin(drive);
519 }
520
521 static int icside_dma_write(ide_drive_t *drive)
522 {
523 struct request *rq = HWGROUP(drive)->rq;
524 task_ioreg_t cmd;
525
526 if (icside_dma_common(drive, rq, DMA_MODE_WRITE))
527 return 1;
528
529 if (drive->media != ide_disk)
530 return 0;
531
532 BUG_ON(HWGROUP(drive)->handler != NULL);
533
534 /*
535 * FIX ME to use only ACB ide_task_t args Struct
536 */
537 #if 0
538 {
539 ide_task_t *args = rq->special;
540 cmd = args->tfRegister[IDE_COMMAND_OFFSET];
541 }
542 #else
543 if (rq->flags & REQ_DRIVE_TASKFILE) {
544 ide_task_t *args = rq->special;
545 cmd = args->tfRegister[IDE_COMMAND_OFFSET];
546 } else if (drive->addressing == 1) {
547 cmd = WIN_WRITEDMA_EXT;
548 } else {
549 cmd = WIN_WRITEDMA;
550 }
551 #endif
552
553 /* issue cmd to drive */
554 ide_execute_command(drive, cmd, icside_dmaintr, 2*WAIT_CMD, NULL);
555
556 return icside_dma_begin(drive);
557 }
558
559 static int icside_dma_test_irq(ide_drive_t *drive)
560 {
561 ide_hwif_t *hwif = HWIF(drive);
562 struct icside_state *state = hwif->hwif_data;
563
564 return inb(state->irq_port +
565 (hwif->channel ?
566 ICS_ARCIN_V6_INTRSTAT_2 :
567 ICS_ARCIN_V6_INTRSTAT_1)) & 1;
568 }
569
570 static int icside_dma_verbose(ide_drive_t *drive)
571 {
572 printk(", %s (peak %dMB/s)",
573 ide_xfer_verbose(drive->current_speed),
574 2000 / drive->drive_data);
575 return 1;
576 }
577
578 static int icside_dma_timeout(ide_drive_t *drive)
579 {
580 printk(KERN_ERR "%s: DMA timeout occurred: ", drive->name);
581
582 if (icside_dma_test_irq(drive))
583 return 0;
584
585 ide_dump_status(drive, "DMA timeout",
586 HWIF(drive)->INB(IDE_STATUS_REG));
587
588 return icside_dma_end(drive);
589 }
590
591 static int icside_dma_lostirq(ide_drive_t *drive)
592 {
593 printk(KERN_ERR "%s: IRQ lost\n", drive->name);
594 return 1;
595 }
596
597 static int icside_dma_init(ide_hwif_t *hwif)
598 {
599 int autodma = 0;
600
601 #ifdef CONFIG_IDEDMA_ICS_AUTO
602 autodma = 1;
603 #endif
604
605 printk(" %s: SG-DMA", hwif->name);
606
607 hwif->sg_table = kmalloc(sizeof(struct scatterlist) * NR_ENTRIES,
608 GFP_KERNEL);
609 if (!hwif->sg_table)
610 goto failed;
611
612 hwif->atapi_dma = 1;
613 hwif->mwdma_mask = 7; /* MW0..2 */
614 hwif->swdma_mask = 7; /* SW0..2 */
615
616 hwif->dmatable_cpu = NULL;
617 hwif->dmatable_dma = 0;
618 hwif->speedproc = icside_set_speed;
619 hwif->autodma = autodma;
620
621 hwif->ide_dma_check = icside_dma_check;
622 hwif->ide_dma_host_off = icside_dma_host_off;
623 hwif->ide_dma_off_quietly = icside_dma_off_quietly;
624 hwif->ide_dma_host_on = icside_dma_host_on;
625 hwif->ide_dma_on = icside_dma_on;
626 hwif->ide_dma_read = icside_dma_read;
627 hwif->ide_dma_write = icside_dma_write;
628 hwif->ide_dma_begin = icside_dma_begin;
629 hwif->ide_dma_end = icside_dma_end;
630 hwif->ide_dma_test_irq = icside_dma_test_irq;
631 hwif->ide_dma_verbose = icside_dma_verbose;
632 hwif->ide_dma_timeout = icside_dma_timeout;
633 hwif->ide_dma_lostirq = icside_dma_lostirq;
634
635 hwif->drives[0].autodma = hwif->autodma;
636 hwif->drives[1].autodma = hwif->autodma;
637
638 printk(" capable%s\n", hwif->autodma ? ", auto-enable" : "");
639
640 return 1;
641
642 failed:
643 printk(" disabled, unable to allocate DMA table\n");
644 return 0;
645 }
646
647 static void icside_dma_exit(ide_hwif_t *hwif)
648 {
649 if (hwif->sg_table) {
650 kfree(hwif->sg_table);
651 hwif->sg_table = NULL;
652 }
653 }
654 #else
655 #define icside_dma_init(hwif) (0)
656 #define icside_dma_exit(hwif) do { } while (0)
657 #endif
658
659 static ide_hwif_t *icside_find_hwif(unsigned long dataport)
660 {
661 ide_hwif_t *hwif;
662 int index;
663
664 for (index = 0; index < MAX_HWIFS; ++index) {
665 hwif = &ide_hwifs[index];
666 if (hwif->io_ports[IDE_DATA_OFFSET] == dataport)
667 goto found;
668 }
669
670 for (index = 0; index < MAX_HWIFS; ++index) {
671 hwif = &ide_hwifs[index];
672 if (!hwif->io_ports[IDE_DATA_OFFSET])
673 goto found;
674 }
675
676 hwif = NULL;
677 found:
678 return hwif;
679 }
680
681 static ide_hwif_t *
682 icside_setup(unsigned long base, struct cardinfo *info, struct expansion_card *ec)
683 {
684 unsigned long port = base + info->dataoffset;
685 ide_hwif_t *hwif;
686
687 hwif = icside_find_hwif(base);
688 if (hwif) {
689 int i;
690
691 memset(&hwif->hw, 0, sizeof(hw_regs_t));
692
693 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
694 hwif->hw.io_ports[i] = port;
695 hwif->io_ports[i] = port;
696 port += 1 << info->stepping;
697 }
698 hwif->hw.io_ports[IDE_CONTROL_OFFSET] = base + info->ctrloffset;
699 hwif->io_ports[IDE_CONTROL_OFFSET] = base + info->ctrloffset;
700 hwif->hw.irq = ec->irq;
701 hwif->irq = ec->irq;
702 hwif->noprobe = 0;
703 hwif->chipset = ide_acorn;
704 hwif->gendev.parent = &ec->dev;
705 }
706
707 return hwif;
708 }
709
710 static int __init
711 icside_register_v5(struct icside_state *state, struct expansion_card *ec)
712 {
713 unsigned long slot_port;
714 ide_hwif_t *hwif;
715
716 slot_port = ecard_address(ec, ECARD_MEMC, 0);
717
718 state->irq_port = slot_port;
719
720 ec->irqaddr = (unsigned char *)ioaddr(slot_port + ICS_ARCIN_V5_INTRSTAT);
721 ec->irqmask = 1;
722 ec->irq_data = state;
723 ec->ops = &icside_ops_arcin_v5;
724
725 /*
726 * Be on the safe side - disable interrupts
727 */
728 inb(slot_port + ICS_ARCIN_V5_INTROFFSET);
729
730 hwif = icside_setup(slot_port, &icside_cardinfo_v5, ec);
731
732 state->hwif[0] = hwif;
733
734 return hwif ? 0 : -ENODEV;
735 }
736
737 static int __init
738 icside_register_v6(struct icside_state *state, struct expansion_card *ec)
739 {
740 unsigned long slot_port, port;
741 ide_hwif_t *hwif, *mate;
742 unsigned int sel = 0;
743
744 slot_port = ecard_address(ec, ECARD_IOC, ECARD_FAST);
745 port = ecard_address(ec, ECARD_EASI, ECARD_FAST);
746
747 if (port == 0)
748 port = slot_port;
749 else
750 sel = 1 << 5;
751
752 outb(sel, slot_port);
753
754 /*
755 * Be on the safe side - disable interrupts
756 */
757 inb(port + ICS_ARCIN_V6_INTROFFSET_1);
758 inb(port + ICS_ARCIN_V6_INTROFFSET_2);
759
760 /*
761 * Find and register the interfaces.
762 */
763 hwif = icside_setup(port, &icside_cardinfo_v6_1, ec);
764 mate = icside_setup(port, &icside_cardinfo_v6_2, ec);
765
766 if (!hwif || !mate)
767 return -ENODEV;
768
769 state->irq_port = port;
770 state->slot_port = slot_port;
771 state->hwif[0] = hwif;
772 state->hwif[1] = mate;
773
774 ec->irq_data = state;
775 ec->ops = &icside_ops_arcin_v6;
776
777 hwif->maskproc = icside_maskproc;
778 hwif->channel = 0;
779 hwif->hwif_data = state;
780 hwif->mate = mate;
781 hwif->serialized = 1;
782 hwif->config_data = slot_port;
783 hwif->select_data = sel;
784 hwif->hw.dma = ec->dma;
785
786 mate->maskproc = icside_maskproc;
787 mate->channel = 1;
788 mate->hwif_data = state;
789 mate->mate = hwif;
790 mate->serialized = 1;
791 mate->config_data = slot_port;
792 mate->select_data = sel | 1;
793 mate->hw.dma = ec->dma;
794
795 if (ec->dma != NO_DMA && !request_dma(ec->dma, hwif->name)) {
796 icside_dma_init(hwif);
797 icside_dma_init(mate);
798 }
799
800 return 0;
801 }
802
803 static int __devinit
804 icside_probe(struct expansion_card *ec, const struct ecard_id *id)
805 {
806 struct icside_state *state;
807 void *idmem;
808 int ret;
809
810 state = kmalloc(sizeof(struct icside_state), GFP_KERNEL);
811 if (!state) {
812 ret = -ENOMEM;
813 goto out;
814 }
815
816 memset(state, 0, sizeof(state));
817 state->type = ICS_TYPE_NOTYPE;
818 state->dev = &ec->dev;
819
820 idmem = ioremap(ecard_resource_start(ec, ECARD_RES_IOCFAST),
821 ecard_resource_len(ec, ECARD_RES_IOCFAST));
822 if (idmem) {
823 unsigned int type;
824
825 type = readb(idmem + ICS_IDENT_OFFSET) & 1;
826 type |= (readb(idmem + ICS_IDENT_OFFSET + 4) & 1) << 1;
827 type |= (readb(idmem + ICS_IDENT_OFFSET + 8) & 1) << 2;
828 type |= (readb(idmem + ICS_IDENT_OFFSET + 12) & 1) << 3;
829 iounmap(idmem);
830
831 state->type = type;
832 }
833
834 switch (state->type) {
835 case ICS_TYPE_A3IN:
836 printk(KERN_WARNING "icside: A3IN unsupported\n");
837 ret = -ENODEV;
838 break;
839
840 case ICS_TYPE_A3USER:
841 printk(KERN_WARNING "icside: A3USER unsupported\n");
842 ret = -ENODEV;
843 break;
844
845 case ICS_TYPE_V5:
846 ret = icside_register_v5(state, ec);
847 break;
848
849 case ICS_TYPE_V6:
850 ret = icside_register_v6(state, ec);
851 break;
852
853 default:
854 printk(KERN_WARNING "icside: unknown interface type\n");
855 ret = -ENODEV;
856 break;
857 }
858
859 if (ret == 0)
860 ecard_set_drvdata(ec, state);
861 else
862 kfree(state);
863 out:
864 return ret;
865 }
866
867 static void __devexit icside_remove(struct expansion_card *ec)
868 {
869 struct icside_state *state = ecard_get_drvdata(ec);
870
871 switch (state->type) {
872 case ICS_TYPE_V5:
873 /* FIXME: tell IDE to stop using the interface */
874
875 /* Disable interrupts */
876 inb(state->slot_port + ICS_ARCIN_V5_INTROFFSET);
877 break;
878
879 case ICS_TYPE_V6:
880 /* FIXME: tell IDE to stop using the interface */
881 icside_dma_exit(state->hwif[1]);
882 icside_dma_exit(state->hwif[0]);
883
884 if (ec->dma != NO_DMA)
885 free_dma(ec->dma);
886
887 /* Disable interrupts */
888 inb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
889 inb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
890
891 /* Reset the ROM pointer/EASI selection */
892 outb(0, state->slot_port);
893 break;
894 }
895
896 ecard_set_drvdata(ec, NULL);
897 ec->ops = NULL;
898 ec->irq_data = NULL;
899
900 kfree(state);
901 }
902
903 static void icside_shutdown(struct expansion_card *ec)
904 {
905 struct icside_state *state = ecard_get_drvdata(ec);
906
907 switch (state->type) {
908 case ICS_TYPE_V5:
909 /* Disable interrupts */
910 inb(state->slot_port + ICS_ARCIN_V5_INTROFFSET);
911 break;
912
913 case ICS_TYPE_V6:
914 /* Disable interrupts */
915 inb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
916 inb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
917
918 /* Reset the ROM pointer/EASI selection */
919 outb(0, state->slot_port);
920 break;
921 }
922 }
923
924 static const struct ecard_id icside_ids[] = {
925 { MANU_ICS, PROD_ICS_IDE },
926 { MANU_ICS2, PROD_ICS2_IDE },
927 { 0xffff, 0xffff }
928 };
929
930 static struct ecard_driver icside_driver = {
931 .probe = icside_probe,
932 .remove = __devexit_p(icside_remove),
933 .shutdown = icside_shutdown,
934 .id_table = icside_ids,
935 .drv = {
936 .name = "icside",
937 },
938 };
939
940 static int __init icside_init(void)
941 {
942 return ecard_register_driver(&icside_driver);
943 }
944
945 MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
946 MODULE_LICENSE("GPL");
947 MODULE_DESCRIPTION("ICS IDE driver");
948
949 module_init(icside_init);
MOXA 2.6.9 from sdlinux-moxaart.tgz