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Linux-2.6.12-rc2
[thirdparty/kernel/stable.git] / drivers / ide / arm / icside.c
1 /*
2 * linux/drivers/ide/arm/icside.c
3 *
4 * Copyright (c) 1996-2004 Russell King.
5 *
6 * Please note that this platform does not support 32-bit IDE IO.
7 */
8
9 #include <linux/config.h>
10 #include <linux/string.h>
11 #include <linux/module.h>
12 #include <linux/ioport.h>
13 #include <linux/slab.h>
14 #include <linux/blkdev.h>
15 #include <linux/errno.h>
16 #include <linux/hdreg.h>
17 #include <linux/ide.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/device.h>
20 #include <linux/init.h>
21 #include <linux/scatterlist.h>
22
23 #include <asm/dma.h>
24 #include <asm/ecard.h>
25 #include <asm/io.h>
26
27 #define ICS_IDENT_OFFSET 0x2280
28
29 #define ICS_ARCIN_V5_INTRSTAT 0x0000
30 #define ICS_ARCIN_V5_INTROFFSET 0x0004
31 #define ICS_ARCIN_V5_IDEOFFSET 0x2800
32 #define ICS_ARCIN_V5_IDEALTOFFSET 0x2b80
33 #define ICS_ARCIN_V5_IDESTEPPING 6
34
35 #define ICS_ARCIN_V6_IDEOFFSET_1 0x2000
36 #define ICS_ARCIN_V6_INTROFFSET_1 0x2200
37 #define ICS_ARCIN_V6_INTRSTAT_1 0x2290
38 #define ICS_ARCIN_V6_IDEALTOFFSET_1 0x2380
39 #define ICS_ARCIN_V6_IDEOFFSET_2 0x3000
40 #define ICS_ARCIN_V6_INTROFFSET_2 0x3200
41 #define ICS_ARCIN_V6_INTRSTAT_2 0x3290
42 #define ICS_ARCIN_V6_IDEALTOFFSET_2 0x3380
43 #define ICS_ARCIN_V6_IDESTEPPING 6
44
45 struct cardinfo {
46 unsigned int dataoffset;
47 unsigned int ctrloffset;
48 unsigned int stepping;
49 };
50
51 static struct cardinfo icside_cardinfo_v5 = {
52 .dataoffset = ICS_ARCIN_V5_IDEOFFSET,
53 .ctrloffset = ICS_ARCIN_V5_IDEALTOFFSET,
54 .stepping = ICS_ARCIN_V5_IDESTEPPING,
55 };
56
57 static struct cardinfo icside_cardinfo_v6_1 = {
58 .dataoffset = ICS_ARCIN_V6_IDEOFFSET_1,
59 .ctrloffset = ICS_ARCIN_V6_IDEALTOFFSET_1,
60 .stepping = ICS_ARCIN_V6_IDESTEPPING,
61 };
62
63 static struct cardinfo icside_cardinfo_v6_2 = {
64 .dataoffset = ICS_ARCIN_V6_IDEOFFSET_2,
65 .ctrloffset = ICS_ARCIN_V6_IDEALTOFFSET_2,
66 .stepping = ICS_ARCIN_V6_IDESTEPPING,
67 };
68
69 struct icside_state {
70 unsigned int channel;
71 unsigned int enabled;
72 void __iomem *irq_port;
73 void __iomem *ioc_base;
74 unsigned int type;
75 /* parent device... until the IDE core gets one of its own */
76 struct device *dev;
77 ide_hwif_t *hwif[2];
78 };
79
80 #define ICS_TYPE_A3IN 0
81 #define ICS_TYPE_A3USER 1
82 #define ICS_TYPE_V6 3
83 #define ICS_TYPE_V5 15
84 #define ICS_TYPE_NOTYPE ((unsigned int)-1)
85
86 /* ---------------- Version 5 PCB Support Functions --------------------- */
87 /* Prototype: icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
88 * Purpose : enable interrupts from card
89 */
90 static void icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
91 {
92 struct icside_state *state = ec->irq_data;
93
94 writeb(0, state->irq_port + ICS_ARCIN_V5_INTROFFSET);
95 }
96
97 /* Prototype: icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
98 * Purpose : disable interrupts from card
99 */
100 static void icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
101 {
102 struct icside_state *state = ec->irq_data;
103
104 readb(state->irq_port + ICS_ARCIN_V5_INTROFFSET);
105 }
106
107 static const expansioncard_ops_t icside_ops_arcin_v5 = {
108 .irqenable = icside_irqenable_arcin_v5,
109 .irqdisable = icside_irqdisable_arcin_v5,
110 };
111
112
113 /* ---------------- Version 6 PCB Support Functions --------------------- */
114 /* Prototype: icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
115 * Purpose : enable interrupts from card
116 */
117 static void icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
118 {
119 struct icside_state *state = ec->irq_data;
120 void __iomem *base = state->irq_port;
121
122 state->enabled = 1;
123
124 switch (state->channel) {
125 case 0:
126 writeb(0, base + ICS_ARCIN_V6_INTROFFSET_1);
127 readb(base + ICS_ARCIN_V6_INTROFFSET_2);
128 break;
129 case 1:
130 writeb(0, base + ICS_ARCIN_V6_INTROFFSET_2);
131 readb(base + ICS_ARCIN_V6_INTROFFSET_1);
132 break;
133 }
134 }
135
136 /* Prototype: icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
137 * Purpose : disable interrupts from card
138 */
139 static void icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
140 {
141 struct icside_state *state = ec->irq_data;
142
143 state->enabled = 0;
144
145 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
146 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
147 }
148
149 /* Prototype: icside_irqprobe(struct expansion_card *ec)
150 * Purpose : detect an active interrupt from card
151 */
152 static int icside_irqpending_arcin_v6(struct expansion_card *ec)
153 {
154 struct icside_state *state = ec->irq_data;
155
156 return readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_1) & 1 ||
157 readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_2) & 1;
158 }
159
160 static const expansioncard_ops_t icside_ops_arcin_v6 = {
161 .irqenable = icside_irqenable_arcin_v6,
162 .irqdisable = icside_irqdisable_arcin_v6,
163 .irqpending = icside_irqpending_arcin_v6,
164 };
165
166 /*
167 * Handle routing of interrupts. This is called before
168 * we write the command to the drive.
169 */
170 static void icside_maskproc(ide_drive_t *drive, int mask)
171 {
172 ide_hwif_t *hwif = HWIF(drive);
173 struct icside_state *state = hwif->hwif_data;
174 unsigned long flags;
175
176 local_irq_save(flags);
177
178 state->channel = hwif->channel;
179
180 if (state->enabled && !mask) {
181 switch (hwif->channel) {
182 case 0:
183 writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
184 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
185 break;
186 case 1:
187 writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
188 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
189 break;
190 }
191 } else {
192 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
193 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
194 }
195
196 local_irq_restore(flags);
197 }
198
199 #ifdef CONFIG_BLK_DEV_IDEDMA_ICS
200
201 #ifndef CONFIG_IDEDMA_ICS_AUTO
202 #warning CONFIG_IDEDMA_ICS_AUTO=n support is obsolete, and will be removed soon.
203 #endif
204
205 /*
206 * SG-DMA support.
207 *
208 * Similar to the BM-DMA, but we use the RiscPCs IOMD DMA controllers.
209 * There is only one DMA controller per card, which means that only
210 * one drive can be accessed at one time. NOTE! We do not enforce that
211 * here, but we rely on the main IDE driver spotting that both
212 * interfaces use the same IRQ, which should guarantee this.
213 */
214
215 static void icside_build_sglist(ide_drive_t *drive, struct request *rq)
216 {
217 ide_hwif_t *hwif = drive->hwif;
218 struct icside_state *state = hwif->hwif_data;
219 struct scatterlist *sg = hwif->sg_table;
220
221 ide_map_sg(drive, rq);
222
223 if (rq_data_dir(rq) == READ)
224 hwif->sg_dma_direction = DMA_FROM_DEVICE;
225 else
226 hwif->sg_dma_direction = DMA_TO_DEVICE;
227
228 hwif->sg_nents = dma_map_sg(state->dev, sg, hwif->sg_nents,
229 hwif->sg_dma_direction);
230 }
231
232 /*
233 * Configure the IOMD to give the appropriate timings for the transfer
234 * mode being requested. We take the advice of the ATA standards, and
235 * calculate the cycle time based on the transfer mode, and the EIDE
236 * MW DMA specs that the drive provides in the IDENTIFY command.
237 *
238 * We have the following IOMD DMA modes to choose from:
239 *
240 * Type Active Recovery Cycle
241 * A 250 (250) 312 (550) 562 (800)
242 * B 187 250 437
243 * C 125 (125) 125 (375) 250 (500)
244 * D 62 125 187
245 *
246 * (figures in brackets are actual measured timings)
247 *
248 * However, we also need to take care of the read/write active and
249 * recovery timings:
250 *
251 * Read Write
252 * Mode Active -- Recovery -- Cycle IOMD type
253 * MW0 215 50 215 480 A
254 * MW1 80 50 50 150 C
255 * MW2 70 25 25 120 C
256 */
257 static int icside_set_speed(ide_drive_t *drive, u8 xfer_mode)
258 {
259 int on = 0, cycle_time = 0, use_dma_info = 0;
260
261 /*
262 * Limit the transfer speed to MW_DMA_2.
263 */
264 if (xfer_mode > XFER_MW_DMA_2)
265 xfer_mode = XFER_MW_DMA_2;
266
267 switch (xfer_mode) {
268 case XFER_MW_DMA_2:
269 cycle_time = 250;
270 use_dma_info = 1;
271 break;
272
273 case XFER_MW_DMA_1:
274 cycle_time = 250;
275 use_dma_info = 1;
276 break;
277
278 case XFER_MW_DMA_0:
279 cycle_time = 480;
280 break;
281
282 case XFER_SW_DMA_2:
283 case XFER_SW_DMA_1:
284 case XFER_SW_DMA_0:
285 cycle_time = 480;
286 break;
287 }
288
289 /*
290 * If we're going to be doing MW_DMA_1 or MW_DMA_2, we should
291 * take care to note the values in the ID...
292 */
293 if (use_dma_info && drive->id->eide_dma_time > cycle_time)
294 cycle_time = drive->id->eide_dma_time;
295
296 drive->drive_data = cycle_time;
297
298 if (cycle_time && ide_config_drive_speed(drive, xfer_mode) == 0)
299 on = 1;
300 else
301 drive->drive_data = 480;
302
303 printk("%s: %s selected (peak %dMB/s)\n", drive->name,
304 ide_xfer_verbose(xfer_mode), 2000 / drive->drive_data);
305
306 drive->current_speed = xfer_mode;
307
308 return on;
309 }
310
311 static int icside_dma_host_off(ide_drive_t *drive)
312 {
313 return 0;
314 }
315
316 static int icside_dma_off_quietly(ide_drive_t *drive)
317 {
318 drive->using_dma = 0;
319 return icside_dma_host_off(drive);
320 }
321
322 static int icside_dma_host_on(ide_drive_t *drive)
323 {
324 return 0;
325 }
326
327 static int icside_dma_on(ide_drive_t *drive)
328 {
329 drive->using_dma = 1;
330 return icside_dma_host_on(drive);
331 }
332
333 static int icside_dma_check(ide_drive_t *drive)
334 {
335 struct hd_driveid *id = drive->id;
336 ide_hwif_t *hwif = HWIF(drive);
337 int xfer_mode = XFER_PIO_2;
338 int on;
339
340 if (!(id->capability & 1) || !hwif->autodma)
341 goto out;
342
343 /*
344 * Consult the list of known "bad" drives
345 */
346 if (__ide_dma_bad_drive(drive))
347 goto out;
348
349 /*
350 * Enable DMA on any drive that has multiword DMA
351 */
352 if (id->field_valid & 2) {
353 xfer_mode = ide_dma_speed(drive, 0);
354 goto out;
355 }
356
357 /*
358 * Consult the list of known "good" drives
359 */
360 if (__ide_dma_good_drive(drive)) {
361 if (id->eide_dma_time > 150)
362 goto out;
363 xfer_mode = XFER_MW_DMA_1;
364 }
365
366 out:
367 on = icside_set_speed(drive, xfer_mode);
368
369 if (on)
370 return icside_dma_on(drive);
371 else
372 return icside_dma_off_quietly(drive);
373 }
374
375 static int icside_dma_end(ide_drive_t *drive)
376 {
377 ide_hwif_t *hwif = HWIF(drive);
378 struct icside_state *state = hwif->hwif_data;
379
380 drive->waiting_for_dma = 0;
381
382 disable_dma(hwif->hw.dma);
383
384 /* Teardown mappings after DMA has completed. */
385 dma_unmap_sg(state->dev, hwif->sg_table, hwif->sg_nents,
386 hwif->sg_dma_direction);
387
388 return get_dma_residue(hwif->hw.dma) != 0;
389 }
390
391 static void icside_dma_start(ide_drive_t *drive)
392 {
393 ide_hwif_t *hwif = HWIF(drive);
394
395 /* We can not enable DMA on both channels simultaneously. */
396 BUG_ON(dma_channel_active(hwif->hw.dma));
397 enable_dma(hwif->hw.dma);
398 }
399
400 static int icside_dma_setup(ide_drive_t *drive)
401 {
402 ide_hwif_t *hwif = HWIF(drive);
403 struct request *rq = hwif->hwgroup->rq;
404 unsigned int dma_mode;
405
406 if (rq_data_dir(rq))
407 dma_mode = DMA_MODE_WRITE;
408 else
409 dma_mode = DMA_MODE_READ;
410
411 /*
412 * We can not enable DMA on both channels.
413 */
414 BUG_ON(dma_channel_active(hwif->hw.dma));
415
416 icside_build_sglist(drive, rq);
417
418 /*
419 * Ensure that we have the right interrupt routed.
420 */
421 icside_maskproc(drive, 0);
422
423 /*
424 * Route the DMA signals to the correct interface.
425 */
426 writeb(hwif->select_data, hwif->config_data);
427
428 /*
429 * Select the correct timing for this drive.
430 */
431 set_dma_speed(hwif->hw.dma, drive->drive_data);
432
433 /*
434 * Tell the DMA engine about the SG table and
435 * data direction.
436 */
437 set_dma_sg(hwif->hw.dma, hwif->sg_table, hwif->sg_nents);
438 set_dma_mode(hwif->hw.dma, dma_mode);
439
440 drive->waiting_for_dma = 1;
441
442 return 0;
443 }
444
445 static void icside_dma_exec_cmd(ide_drive_t *drive, u8 cmd)
446 {
447 /* issue cmd to drive */
448 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD, NULL);
449 }
450
451 static int icside_dma_test_irq(ide_drive_t *drive)
452 {
453 ide_hwif_t *hwif = HWIF(drive);
454 struct icside_state *state = hwif->hwif_data;
455
456 return readb(state->irq_port +
457 (hwif->channel ?
458 ICS_ARCIN_V6_INTRSTAT_2 :
459 ICS_ARCIN_V6_INTRSTAT_1)) & 1;
460 }
461
462 static int icside_dma_timeout(ide_drive_t *drive)
463 {
464 printk(KERN_ERR "%s: DMA timeout occurred: ", drive->name);
465
466 if (icside_dma_test_irq(drive))
467 return 0;
468
469 ide_dump_status(drive, "DMA timeout",
470 HWIF(drive)->INB(IDE_STATUS_REG));
471
472 return icside_dma_end(drive);
473 }
474
475 static int icside_dma_lostirq(ide_drive_t *drive)
476 {
477 printk(KERN_ERR "%s: IRQ lost\n", drive->name);
478 return 1;
479 }
480
481 static void icside_dma_init(ide_hwif_t *hwif)
482 {
483 int autodma = 0;
484
485 #ifdef CONFIG_IDEDMA_ICS_AUTO
486 autodma = 1;
487 #endif
488
489 printk(" %s: SG-DMA", hwif->name);
490
491 hwif->atapi_dma = 1;
492 hwif->mwdma_mask = 7; /* MW0..2 */
493 hwif->swdma_mask = 7; /* SW0..2 */
494
495 hwif->dmatable_cpu = NULL;
496 hwif->dmatable_dma = 0;
497 hwif->speedproc = icside_set_speed;
498 hwif->autodma = autodma;
499
500 hwif->ide_dma_check = icside_dma_check;
501 hwif->ide_dma_host_off = icside_dma_host_off;
502 hwif->ide_dma_off_quietly = icside_dma_off_quietly;
503 hwif->ide_dma_host_on = icside_dma_host_on;
504 hwif->ide_dma_on = icside_dma_on;
505 hwif->dma_setup = icside_dma_setup;
506 hwif->dma_exec_cmd = icside_dma_exec_cmd;
507 hwif->dma_start = icside_dma_start;
508 hwif->ide_dma_end = icside_dma_end;
509 hwif->ide_dma_test_irq = icside_dma_test_irq;
510 hwif->ide_dma_timeout = icside_dma_timeout;
511 hwif->ide_dma_lostirq = icside_dma_lostirq;
512
513 hwif->drives[0].autodma = hwif->autodma;
514 hwif->drives[1].autodma = hwif->autodma;
515
516 printk(" capable%s\n", hwif->autodma ? ", auto-enable" : "");
517 }
518 #else
519 #define icside_dma_init(hwif) (0)
520 #endif
521
522 static ide_hwif_t *icside_find_hwif(unsigned long dataport)
523 {
524 ide_hwif_t *hwif;
525 int index;
526
527 for (index = 0; index < MAX_HWIFS; ++index) {
528 hwif = &ide_hwifs[index];
529 if (hwif->io_ports[IDE_DATA_OFFSET] == dataport)
530 goto found;
531 }
532
533 for (index = 0; index < MAX_HWIFS; ++index) {
534 hwif = &ide_hwifs[index];
535 if (!hwif->io_ports[IDE_DATA_OFFSET])
536 goto found;
537 }
538
539 hwif = NULL;
540 found:
541 return hwif;
542 }
543
544 static ide_hwif_t *
545 icside_setup(void __iomem *base, struct cardinfo *info, struct expansion_card *ec)
546 {
547 unsigned long port = (unsigned long)base + info->dataoffset;
548 ide_hwif_t *hwif;
549
550 hwif = icside_find_hwif(port);
551 if (hwif) {
552 int i;
553
554 memset(&hwif->hw, 0, sizeof(hw_regs_t));
555
556 /*
557 * Ensure we're using MMIO
558 */
559 default_hwif_mmiops(hwif);
560 hwif->mmio = 2;
561
562 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
563 hwif->hw.io_ports[i] = port;
564 hwif->io_ports[i] = port;
565 port += 1 << info->stepping;
566 }
567 hwif->hw.io_ports[IDE_CONTROL_OFFSET] = (unsigned long)base + info->ctrloffset;
568 hwif->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)base + info->ctrloffset;
569 hwif->hw.irq = ec->irq;
570 hwif->irq = ec->irq;
571 hwif->noprobe = 0;
572 hwif->chipset = ide_acorn;
573 hwif->gendev.parent = &ec->dev;
574 }
575
576 return hwif;
577 }
578
579 static int __init
580 icside_register_v5(struct icside_state *state, struct expansion_card *ec)
581 {
582 ide_hwif_t *hwif;
583 void __iomem *base;
584
585 base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
586 ecard_resource_len(ec, ECARD_RES_MEMC));
587 if (!base)
588 return -ENOMEM;
589
590 state->irq_port = base;
591
592 ec->irqaddr = base + ICS_ARCIN_V5_INTRSTAT;
593 ec->irqmask = 1;
594 ec->irq_data = state;
595 ec->ops = &icside_ops_arcin_v5;
596
597 /*
598 * Be on the safe side - disable interrupts
599 */
600 icside_irqdisable_arcin_v5(ec, 0);
601
602 hwif = icside_setup(base, &icside_cardinfo_v5, ec);
603 if (!hwif) {
604 iounmap(base);
605 return -ENODEV;
606 }
607
608 state->hwif[0] = hwif;
609
610 probe_hwif_init(hwif);
611 create_proc_ide_interfaces();
612
613 return 0;
614 }
615
616 static int __init
617 icside_register_v6(struct icside_state *state, struct expansion_card *ec)
618 {
619 ide_hwif_t *hwif, *mate;
620 void __iomem *ioc_base, *easi_base;
621 unsigned int sel = 0;
622 int ret;
623
624 ioc_base = ioremap(ecard_resource_start(ec, ECARD_RES_IOCFAST),
625 ecard_resource_len(ec, ECARD_RES_IOCFAST));
626 if (!ioc_base) {
627 ret = -ENOMEM;
628 goto out;
629 }
630
631 easi_base = ioc_base;
632
633 if (ecard_resource_flags(ec, ECARD_RES_EASI)) {
634 easi_base = ioremap(ecard_resource_start(ec, ECARD_RES_EASI),
635 ecard_resource_len(ec, ECARD_RES_EASI));
636 if (!easi_base) {
637 ret = -ENOMEM;
638 goto unmap_slot;
639 }
640
641 /*
642 * Enable access to the EASI region.
643 */
644 sel = 1 << 5;
645 }
646
647 writeb(sel, ioc_base);
648
649 ec->irq_data = state;
650 ec->ops = &icside_ops_arcin_v6;
651
652 state->irq_port = easi_base;
653 state->ioc_base = ioc_base;
654
655 /*
656 * Be on the safe side - disable interrupts
657 */
658 icside_irqdisable_arcin_v6(ec, 0);
659
660 /*
661 * Find and register the interfaces.
662 */
663 hwif = icside_setup(easi_base, &icside_cardinfo_v6_1, ec);
664 mate = icside_setup(easi_base, &icside_cardinfo_v6_2, ec);
665
666 if (!hwif || !mate) {
667 ret = -ENODEV;
668 goto unmap_port;
669 }
670
671 state->hwif[0] = hwif;
672 state->hwif[1] = mate;
673
674 hwif->maskproc = icside_maskproc;
675 hwif->channel = 0;
676 hwif->hwif_data = state;
677 hwif->mate = mate;
678 hwif->serialized = 1;
679 hwif->config_data = (unsigned long)ioc_base;
680 hwif->select_data = sel;
681 hwif->hw.dma = ec->dma;
682
683 mate->maskproc = icside_maskproc;
684 mate->channel = 1;
685 mate->hwif_data = state;
686 mate->mate = hwif;
687 mate->serialized = 1;
688 mate->config_data = (unsigned long)ioc_base;
689 mate->select_data = sel | 1;
690 mate->hw.dma = ec->dma;
691
692 if (ec->dma != NO_DMA && !request_dma(ec->dma, hwif->name)) {
693 icside_dma_init(hwif);
694 icside_dma_init(mate);
695 }
696
697 probe_hwif_init(hwif);
698 probe_hwif_init(mate);
699 create_proc_ide_interfaces();
700
701 return 0;
702
703 unmap_port:
704 if (easi_base != ioc_base)
705 iounmap(easi_base);
706 unmap_slot:
707 iounmap(ioc_base);
708 out:
709 return ret;
710 }
711
712 static int __devinit
713 icside_probe(struct expansion_card *ec, const struct ecard_id *id)
714 {
715 struct icside_state *state;
716 void __iomem *idmem;
717 int ret;
718
719 ret = ecard_request_resources(ec);
720 if (ret)
721 goto out;
722
723 state = kmalloc(sizeof(struct icside_state), GFP_KERNEL);
724 if (!state) {
725 ret = -ENOMEM;
726 goto release;
727 }
728
729 memset(state, 0, sizeof(state));
730 state->type = ICS_TYPE_NOTYPE;
731 state->dev = &ec->dev;
732
733 idmem = ioremap(ecard_resource_start(ec, ECARD_RES_IOCFAST),
734 ecard_resource_len(ec, ECARD_RES_IOCFAST));
735 if (idmem) {
736 unsigned int type;
737
738 type = readb(idmem + ICS_IDENT_OFFSET) & 1;
739 type |= (readb(idmem + ICS_IDENT_OFFSET + 4) & 1) << 1;
740 type |= (readb(idmem + ICS_IDENT_OFFSET + 8) & 1) << 2;
741 type |= (readb(idmem + ICS_IDENT_OFFSET + 12) & 1) << 3;
742 iounmap(idmem);
743
744 state->type = type;
745 }
746
747 switch (state->type) {
748 case ICS_TYPE_A3IN:
749 dev_warn(&ec->dev, "A3IN unsupported\n");
750 ret = -ENODEV;
751 break;
752
753 case ICS_TYPE_A3USER:
754 dev_warn(&ec->dev, "A3USER unsupported\n");
755 ret = -ENODEV;
756 break;
757
758 case ICS_TYPE_V5:
759 ret = icside_register_v5(state, ec);
760 break;
761
762 case ICS_TYPE_V6:
763 ret = icside_register_v6(state, ec);
764 break;
765
766 default:
767 dev_warn(&ec->dev, "unknown interface type\n");
768 ret = -ENODEV;
769 break;
770 }
771
772 if (ret == 0) {
773 ecard_set_drvdata(ec, state);
774 goto out;
775 }
776
777 kfree(state);
778 release:
779 ecard_release_resources(ec);
780 out:
781 return ret;
782 }
783
784 static void __devexit icside_remove(struct expansion_card *ec)
785 {
786 struct icside_state *state = ecard_get_drvdata(ec);
787
788 switch (state->type) {
789 case ICS_TYPE_V5:
790 /* FIXME: tell IDE to stop using the interface */
791
792 /* Disable interrupts */
793 icside_irqdisable_arcin_v5(ec, 0);
794 break;
795
796 case ICS_TYPE_V6:
797 /* FIXME: tell IDE to stop using the interface */
798 if (ec->dma != NO_DMA)
799 free_dma(ec->dma);
800
801 /* Disable interrupts */
802 icside_irqdisable_arcin_v6(ec, 0);
803
804 /* Reset the ROM pointer/EASI selection */
805 writeb(0, state->ioc_base);
806 break;
807 }
808
809 ecard_set_drvdata(ec, NULL);
810 ec->ops = NULL;
811 ec->irq_data = NULL;
812
813 if (state->ioc_base)
814 iounmap(state->ioc_base);
815 if (state->ioc_base != state->irq_port)
816 iounmap(state->irq_port);
817
818 kfree(state);
819 ecard_release_resources(ec);
820 }
821
822 static void icside_shutdown(struct expansion_card *ec)
823 {
824 struct icside_state *state = ecard_get_drvdata(ec);
825 unsigned long flags;
826
827 /*
828 * Disable interrupts from this card. We need to do
829 * this before disabling EASI since we may be accessing
830 * this register via that region.
831 */
832 local_irq_save(flags);
833 ec->ops->irqdisable(ec, 0);
834 local_irq_restore(flags);
835
836 /*
837 * Reset the ROM pointer so that we can read the ROM
838 * after a soft reboot. This also disables access to
839 * the IDE taskfile via the EASI region.
840 */
841 if (state->ioc_base)
842 writeb(0, state->ioc_base);
843 }
844
845 static const struct ecard_id icside_ids[] = {
846 { MANU_ICS, PROD_ICS_IDE },
847 { MANU_ICS2, PROD_ICS2_IDE },
848 { 0xffff, 0xffff }
849 };
850
851 static struct ecard_driver icside_driver = {
852 .probe = icside_probe,
853 .remove = __devexit_p(icside_remove),
854 .shutdown = icside_shutdown,
855 .id_table = icside_ids,
856 .drv = {
857 .name = "icside",
858 },
859 };
860
861 static int __init icside_init(void)
862 {
863 return ecard_register_driver(&icside_driver);
864 }
865
866 MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
867 MODULE_LICENSE("GPL");
868 MODULE_DESCRIPTION("ICS IDE driver");
869
870 module_init(icside_init);
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git