blob: 7912a471f10daaa8e69cec965db3a0b3f819ee89 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/string.h>
10#include <linux/module.h>
11#include <linux/ioport.h>
12#include <linux/slab.h>
13#include <linux/blkdev.h>
14#include <linux/errno.h>
15#include <linux/hdreg.h>
16#include <linux/ide.h>
17#include <linux/dma-mapping.h>
18#include <linux/device.h>
19#include <linux/init.h>
20#include <linux/scatterlist.h>
Al Viroba5b55d2007-07-15 21:01:32 +010021#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
23#include <asm/dma.h>
24#include <asm/ecard.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
26#define ICS_IDENT_OFFSET 0x2280
27
28#define ICS_ARCIN_V5_INTRSTAT 0x0000
29#define ICS_ARCIN_V5_INTROFFSET 0x0004
30#define ICS_ARCIN_V5_IDEOFFSET 0x2800
31#define ICS_ARCIN_V5_IDEALTOFFSET 0x2b80
32#define ICS_ARCIN_V5_IDESTEPPING 6
33
34#define ICS_ARCIN_V6_IDEOFFSET_1 0x2000
35#define ICS_ARCIN_V6_INTROFFSET_1 0x2200
36#define ICS_ARCIN_V6_INTRSTAT_1 0x2290
37#define ICS_ARCIN_V6_IDEALTOFFSET_1 0x2380
38#define ICS_ARCIN_V6_IDEOFFSET_2 0x3000
39#define ICS_ARCIN_V6_INTROFFSET_2 0x3200
40#define ICS_ARCIN_V6_INTRSTAT_2 0x3290
41#define ICS_ARCIN_V6_IDEALTOFFSET_2 0x3380
42#define ICS_ARCIN_V6_IDESTEPPING 6
43
44struct cardinfo {
45 unsigned int dataoffset;
46 unsigned int ctrloffset;
47 unsigned int stepping;
48};
49
50static struct cardinfo icside_cardinfo_v5 = {
51 .dataoffset = ICS_ARCIN_V5_IDEOFFSET,
52 .ctrloffset = ICS_ARCIN_V5_IDEALTOFFSET,
53 .stepping = ICS_ARCIN_V5_IDESTEPPING,
54};
55
56static struct cardinfo icside_cardinfo_v6_1 = {
57 .dataoffset = ICS_ARCIN_V6_IDEOFFSET_1,
58 .ctrloffset = ICS_ARCIN_V6_IDEALTOFFSET_1,
59 .stepping = ICS_ARCIN_V6_IDESTEPPING,
60};
61
62static struct cardinfo icside_cardinfo_v6_2 = {
63 .dataoffset = ICS_ARCIN_V6_IDEOFFSET_2,
64 .ctrloffset = ICS_ARCIN_V6_IDEALTOFFSET_2,
65 .stepping = ICS_ARCIN_V6_IDESTEPPING,
66};
67
68struct icside_state {
69 unsigned int channel;
70 unsigned int enabled;
71 void __iomem *irq_port;
72 void __iomem *ioc_base;
73 unsigned int type;
74 /* parent device... until the IDE core gets one of its own */
75 struct device *dev;
76 ide_hwif_t *hwif[2];
77};
78
79#define ICS_TYPE_A3IN 0
80#define ICS_TYPE_A3USER 1
81#define ICS_TYPE_V6 3
82#define ICS_TYPE_V5 15
83#define ICS_TYPE_NOTYPE ((unsigned int)-1)
84
85/* ---------------- Version 5 PCB Support Functions --------------------- */
86/* Prototype: icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
87 * Purpose : enable interrupts from card
88 */
89static void icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
90{
91 struct icside_state *state = ec->irq_data;
92
93 writeb(0, state->irq_port + ICS_ARCIN_V5_INTROFFSET);
94}
95
96/* Prototype: icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
97 * Purpose : disable interrupts from card
98 */
99static void icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
100{
101 struct icside_state *state = ec->irq_data;
102
103 readb(state->irq_port + ICS_ARCIN_V5_INTROFFSET);
104}
105
106static 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 */
116static void icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
117{
118 struct icside_state *state = ec->irq_data;
119 void __iomem *base = state->irq_port;
120
121 state->enabled = 1;
122
123 switch (state->channel) {
124 case 0:
125 writeb(0, base + ICS_ARCIN_V6_INTROFFSET_1);
126 readb(base + ICS_ARCIN_V6_INTROFFSET_2);
127 break;
128 case 1:
129 writeb(0, base + ICS_ARCIN_V6_INTROFFSET_2);
130 readb(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 */
138static 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 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
145 readb(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 */
151static int icside_irqpending_arcin_v6(struct expansion_card *ec)
152{
153 struct icside_state *state = ec->irq_data;
154
155 return readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_1) & 1 ||
156 readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_2) & 1;
157}
158
159static 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 */
169static 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 writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
183 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
184 break;
185 case 1:
186 writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
187 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
188 break;
189 }
190 } else {
191 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
192 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
193 }
194
195 local_irq_restore(flags);
196}
197
198#ifdef CONFIG_BLK_DEV_IDEDMA_ICS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199/*
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
209static void icside_build_sglist(ide_drive_t *drive, struct request *rq)
210{
211 ide_hwif_t *hwif = drive->hwif;
212 struct icside_state *state = hwif->hwif_data;
213 struct scatterlist *sg = hwif->sg_table;
214
215 ide_map_sg(drive, rq);
216
217 if (rq_data_dir(rq) == READ)
218 hwif->sg_dma_direction = DMA_FROM_DEVICE;
219 else
220 hwif->sg_dma_direction = DMA_TO_DEVICE;
221
222 hwif->sg_nents = dma_map_sg(state->dev, sg, hwif->sg_nents,
223 hwif->sg_dma_direction);
224}
225
226/*
227 * Configure the IOMD to give the appropriate timings for the transfer
228 * mode being requested. We take the advice of the ATA standards, and
229 * calculate the cycle time based on the transfer mode, and the EIDE
230 * MW DMA specs that the drive provides in the IDENTIFY command.
231 *
232 * We have the following IOMD DMA modes to choose from:
233 *
234 * Type Active Recovery Cycle
235 * A 250 (250) 312 (550) 562 (800)
236 * B 187 250 437
237 * C 125 (125) 125 (375) 250 (500)
238 * D 62 125 187
239 *
240 * (figures in brackets are actual measured timings)
241 *
242 * However, we also need to take care of the read/write active and
243 * recovery timings:
244 *
245 * Read Write
246 * Mode Active -- Recovery -- Cycle IOMD type
247 * MW0 215 50 215 480 A
248 * MW1 80 50 50 150 C
249 * MW2 70 25 25 120 C
250 */
Bartlomiej Zolnierkiewiczf212ff22007-10-11 23:53:59 +0200251static int icside_set_speed(ide_drive_t *drive, const u8 xfer_mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252{
Bartlomiej Zolnierkiewiczf44ae582007-10-11 23:54:00 +0200253 int cycle_time, use_dma_info = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 switch (xfer_mode) {
256 case XFER_MW_DMA_2:
257 cycle_time = 250;
258 use_dma_info = 1;
259 break;
260
261 case XFER_MW_DMA_1:
262 cycle_time = 250;
263 use_dma_info = 1;
264 break;
265
266 case XFER_MW_DMA_0:
267 cycle_time = 480;
268 break;
269
270 case XFER_SW_DMA_2:
271 case XFER_SW_DMA_1:
272 case XFER_SW_DMA_0:
273 cycle_time = 480;
274 break;
Bartlomiej Zolnierkiewiczf44ae582007-10-11 23:54:00 +0200275 default:
276 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 }
278
279 /*
280 * If we're going to be doing MW_DMA_1 or MW_DMA_2, we should
281 * take care to note the values in the ID...
282 */
283 if (use_dma_info && drive->id->eide_dma_time > cycle_time)
284 cycle_time = drive->id->eide_dma_time;
285
286 drive->drive_data = cycle_time;
287
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 printk("%s: %s selected (peak %dMB/s)\n", drive->name,
289 ide_xfer_verbose(xfer_mode), 2000 / drive->drive_data);
290
Bartlomiej Zolnierkiewiczf44ae582007-10-11 23:54:00 +0200291 return ide_config_drive_speed(drive, xfer_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292}
293
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100294static void icside_dma_host_off(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296}
297
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100298static void icside_dma_off_quietly(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299{
300 drive->using_dma = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301}
302
Bartlomiej Zolnierkiewiczccf35282007-02-17 02:40:26 +0100303static void icside_dma_host_on(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305}
306
307static int icside_dma_on(ide_drive_t *drive)
308{
309 drive->using_dma = 1;
Bartlomiej Zolnierkiewiczccf35282007-02-17 02:40:26 +0100310
311 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312}
313
314static int icside_dma_check(ide_drive_t *drive)
315{
316 struct hd_driveid *id = drive->id;
317 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewiczf44ae582007-10-11 23:54:00 +0200318 int xfer_mode = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
320 if (!(id->capability & 1) || !hwif->autodma)
321 goto out;
322
323 /*
324 * Consult the list of known "bad" drives
325 */
326 if (__ide_dma_bad_drive(drive))
327 goto out;
328
329 /*
330 * Enable DMA on any drive that has multiword DMA
331 */
332 if (id->field_valid & 2) {
Bartlomiej Zolnierkiewicz2d5eaa62007-05-10 00:01:08 +0200333 xfer_mode = ide_max_dma_mode(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 goto out;
335 }
336
337 /*
338 * Consult the list of known "good" drives
339 */
340 if (__ide_dma_good_drive(drive)) {
341 if (id->eide_dma_time > 150)
342 goto out;
343 xfer_mode = XFER_MW_DMA_1;
344 }
345
346out:
Bartlomiej Zolnierkiewiczf44ae582007-10-11 23:54:00 +0200347 if (xfer_mode == 0)
348 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
Bartlomiej Zolnierkiewiczf44ae582007-10-11 23:54:00 +0200350 return icside_set_speed(drive, xfer_mode) ? -1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351}
352
353static int icside_dma_end(ide_drive_t *drive)
354{
355 ide_hwif_t *hwif = HWIF(drive);
356 struct icside_state *state = hwif->hwif_data;
357
358 drive->waiting_for_dma = 0;
359
360 disable_dma(hwif->hw.dma);
361
362 /* Teardown mappings after DMA has completed. */
363 dma_unmap_sg(state->dev, hwif->sg_table, hwif->sg_nents,
364 hwif->sg_dma_direction);
365
366 return get_dma_residue(hwif->hw.dma) != 0;
367}
368
369static void icside_dma_start(ide_drive_t *drive)
370{
371 ide_hwif_t *hwif = HWIF(drive);
372
373 /* We can not enable DMA on both channels simultaneously. */
374 BUG_ON(dma_channel_active(hwif->hw.dma));
375 enable_dma(hwif->hw.dma);
376}
377
378static int icside_dma_setup(ide_drive_t *drive)
379{
380 ide_hwif_t *hwif = HWIF(drive);
381 struct request *rq = hwif->hwgroup->rq;
382 unsigned int dma_mode;
383
384 if (rq_data_dir(rq))
385 dma_mode = DMA_MODE_WRITE;
386 else
387 dma_mode = DMA_MODE_READ;
388
389 /*
390 * We can not enable DMA on both channels.
391 */
392 BUG_ON(dma_channel_active(hwif->hw.dma));
393
394 icside_build_sglist(drive, rq);
395
396 /*
397 * Ensure that we have the right interrupt routed.
398 */
399 icside_maskproc(drive, 0);
400
401 /*
402 * Route the DMA signals to the correct interface.
403 */
404 writeb(hwif->select_data, hwif->config_data);
405
406 /*
407 * Select the correct timing for this drive.
408 */
409 set_dma_speed(hwif->hw.dma, drive->drive_data);
410
411 /*
412 * Tell the DMA engine about the SG table and
413 * data direction.
414 */
415 set_dma_sg(hwif->hw.dma, hwif->sg_table, hwif->sg_nents);
416 set_dma_mode(hwif->hw.dma, dma_mode);
417
418 drive->waiting_for_dma = 1;
419
420 return 0;
421}
422
423static void icside_dma_exec_cmd(ide_drive_t *drive, u8 cmd)
424{
425 /* issue cmd to drive */
426 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD, NULL);
427}
428
429static int icside_dma_test_irq(ide_drive_t *drive)
430{
431 ide_hwif_t *hwif = HWIF(drive);
432 struct icside_state *state = hwif->hwif_data;
433
434 return readb(state->irq_port +
435 (hwif->channel ?
436 ICS_ARCIN_V6_INTRSTAT_2 :
437 ICS_ARCIN_V6_INTRSTAT_1)) & 1;
438}
439
Sergei Shtylyovc283f5d2007-07-09 23:17:54 +0200440static void icside_dma_timeout(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441{
442 printk(KERN_ERR "%s: DMA timeout occurred: ", drive->name);
443
444 if (icside_dma_test_irq(drive))
Sergei Shtylyovc283f5d2007-07-09 23:17:54 +0200445 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446
Sergei Shtylyovc283f5d2007-07-09 23:17:54 +0200447 ide_dump_status(drive, "DMA timeout", HWIF(drive)->INB(IDE_STATUS_REG));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
Sergei Shtylyovc283f5d2007-07-09 23:17:54 +0200449 icside_dma_end(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450}
451
Sergei Shtylyov841d2a92007-07-09 23:17:54 +0200452static void icside_dma_lost_irq(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453{
454 printk(KERN_ERR "%s: IRQ lost\n", drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455}
456
457static void icside_dma_init(ide_hwif_t *hwif)
458{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 printk(" %s: SG-DMA", hwif->name);
460
461 hwif->atapi_dma = 1;
462 hwif->mwdma_mask = 7; /* MW0..2 */
463 hwif->swdma_mask = 7; /* SW0..2 */
464
465 hwif->dmatable_cpu = NULL;
466 hwif->dmatable_dma = 0;
467 hwif->speedproc = icside_set_speed;
Bartlomiej Zolnierkiewicz120b9cf2007-03-17 21:57:41 +0100468 hwif->autodma = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
470 hwif->ide_dma_check = icside_dma_check;
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100471 hwif->dma_host_off = icside_dma_host_off;
472 hwif->dma_off_quietly = icside_dma_off_quietly;
Bartlomiej Zolnierkiewiczccf35282007-02-17 02:40:26 +0100473 hwif->dma_host_on = icside_dma_host_on;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 hwif->ide_dma_on = icside_dma_on;
475 hwif->dma_setup = icside_dma_setup;
476 hwif->dma_exec_cmd = icside_dma_exec_cmd;
477 hwif->dma_start = icside_dma_start;
478 hwif->ide_dma_end = icside_dma_end;
479 hwif->ide_dma_test_irq = icside_dma_test_irq;
Sergei Shtylyovc283f5d2007-07-09 23:17:54 +0200480 hwif->dma_timeout = icside_dma_timeout;
Sergei Shtylyov841d2a92007-07-09 23:17:54 +0200481 hwif->dma_lost_irq = icside_dma_lost_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482
483 hwif->drives[0].autodma = hwif->autodma;
484 hwif->drives[1].autodma = hwif->autodma;
485
486 printk(" capable%s\n", hwif->autodma ? ", auto-enable" : "");
487}
488#else
489#define icside_dma_init(hwif) (0)
490#endif
491
492static ide_hwif_t *icside_find_hwif(unsigned long dataport)
493{
494 ide_hwif_t *hwif;
495 int index;
496
497 for (index = 0; index < MAX_HWIFS; ++index) {
498 hwif = &ide_hwifs[index];
499 if (hwif->io_ports[IDE_DATA_OFFSET] == dataport)
500 goto found;
501 }
502
503 for (index = 0; index < MAX_HWIFS; ++index) {
504 hwif = &ide_hwifs[index];
505 if (!hwif->io_ports[IDE_DATA_OFFSET])
506 goto found;
507 }
508
509 hwif = NULL;
510found:
511 return hwif;
512}
513
514static ide_hwif_t *
515icside_setup(void __iomem *base, struct cardinfo *info, struct expansion_card *ec)
516{
517 unsigned long port = (unsigned long)base + info->dataoffset;
518 ide_hwif_t *hwif;
519
520 hwif = icside_find_hwif(port);
521 if (hwif) {
522 int i;
523
524 memset(&hwif->hw, 0, sizeof(hw_regs_t));
525
526 /*
527 * Ensure we're using MMIO
528 */
529 default_hwif_mmiops(hwif);
Bartlomiej Zolnierkiewicz2ad1e552007-02-17 02:40:25 +0100530 hwif->mmio = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
532 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
533 hwif->hw.io_ports[i] = port;
534 hwif->io_ports[i] = port;
535 port += 1 << info->stepping;
536 }
537 hwif->hw.io_ports[IDE_CONTROL_OFFSET] = (unsigned long)base + info->ctrloffset;
538 hwif->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)base + info->ctrloffset;
539 hwif->hw.irq = ec->irq;
540 hwif->irq = ec->irq;
541 hwif->noprobe = 0;
542 hwif->chipset = ide_acorn;
543 hwif->gendev.parent = &ec->dev;
544 }
545
546 return hwif;
547}
548
549static int __init
550icside_register_v5(struct icside_state *state, struct expansion_card *ec)
551{
552 ide_hwif_t *hwif;
553 void __iomem *base;
554
Russell King10bdaaa2007-05-10 18:40:51 +0100555 base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 if (!base)
557 return -ENOMEM;
558
559 state->irq_port = base;
560
561 ec->irqaddr = base + ICS_ARCIN_V5_INTRSTAT;
562 ec->irqmask = 1;
Russell Kingc7b87f32007-05-10 16:46:13 +0100563
564 ecard_setirq(ec, &icside_ops_arcin_v5, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
566 /*
567 * Be on the safe side - disable interrupts
568 */
569 icside_irqdisable_arcin_v5(ec, 0);
570
571 hwif = icside_setup(base, &icside_cardinfo_v5, ec);
Russell King10bdaaa2007-05-10 18:40:51 +0100572 if (!hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574
575 state->hwif[0] = hwif;
576
577 probe_hwif_init(hwif);
Bartlomiej Zolnierkiewicz5cbf79c2007-05-10 00:01:11 +0200578
579 ide_proc_register_port(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580
581 return 0;
582}
583
584static int __init
585icside_register_v6(struct icside_state *state, struct expansion_card *ec)
586{
587 ide_hwif_t *hwif, *mate;
588 void __iomem *ioc_base, *easi_base;
589 unsigned int sel = 0;
590 int ret;
591
Russell King10bdaaa2007-05-10 18:40:51 +0100592 ioc_base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 if (!ioc_base) {
594 ret = -ENOMEM;
595 goto out;
596 }
597
598 easi_base = ioc_base;
599
600 if (ecard_resource_flags(ec, ECARD_RES_EASI)) {
Russell King10bdaaa2007-05-10 18:40:51 +0100601 easi_base = ecardm_iomap(ec, ECARD_RES_EASI, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 if (!easi_base) {
603 ret = -ENOMEM;
Russell King10bdaaa2007-05-10 18:40:51 +0100604 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 }
606
607 /*
608 * Enable access to the EASI region.
609 */
610 sel = 1 << 5;
611 }
612
613 writeb(sel, ioc_base);
614
Russell Kingc7b87f32007-05-10 16:46:13 +0100615 ecard_setirq(ec, &icside_ops_arcin_v6, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
617 state->irq_port = easi_base;
618 state->ioc_base = ioc_base;
619
620 /*
621 * Be on the safe side - disable interrupts
622 */
623 icside_irqdisable_arcin_v6(ec, 0);
624
625 /*
626 * Find and register the interfaces.
627 */
628 hwif = icside_setup(easi_base, &icside_cardinfo_v6_1, ec);
629 mate = icside_setup(easi_base, &icside_cardinfo_v6_2, ec);
630
631 if (!hwif || !mate) {
632 ret = -ENODEV;
Russell King10bdaaa2007-05-10 18:40:51 +0100633 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 }
635
636 state->hwif[0] = hwif;
637 state->hwif[1] = mate;
638
639 hwif->maskproc = icside_maskproc;
640 hwif->channel = 0;
641 hwif->hwif_data = state;
642 hwif->mate = mate;
643 hwif->serialized = 1;
644 hwif->config_data = (unsigned long)ioc_base;
645 hwif->select_data = sel;
646 hwif->hw.dma = ec->dma;
647
648 mate->maskproc = icside_maskproc;
649 mate->channel = 1;
650 mate->hwif_data = state;
651 mate->mate = hwif;
652 mate->serialized = 1;
653 mate->config_data = (unsigned long)ioc_base;
654 mate->select_data = sel | 1;
655 mate->hw.dma = ec->dma;
656
657 if (ec->dma != NO_DMA && !request_dma(ec->dma, hwif->name)) {
658 icside_dma_init(hwif);
659 icside_dma_init(mate);
660 }
661
662 probe_hwif_init(hwif);
663 probe_hwif_init(mate);
Bartlomiej Zolnierkiewicz5cbf79c2007-05-10 00:01:11 +0200664
665 ide_proc_register_port(hwif);
666 ide_proc_register_port(mate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667
668 return 0;
669
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 out:
671 return ret;
672}
673
674static int __devinit
675icside_probe(struct expansion_card *ec, const struct ecard_id *id)
676{
677 struct icside_state *state;
678 void __iomem *idmem;
679 int ret;
680
681 ret = ecard_request_resources(ec);
682 if (ret)
683 goto out;
684
Mariusz Kozlowskicc60d8b2007-08-01 23:46:44 +0200685 state = kzalloc(sizeof(struct icside_state), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 if (!state) {
687 ret = -ENOMEM;
688 goto release;
689 }
690
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 state->type = ICS_TYPE_NOTYPE;
692 state->dev = &ec->dev;
693
Russell King10bdaaa2007-05-10 18:40:51 +0100694 idmem = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 if (idmem) {
696 unsigned int type;
697
698 type = readb(idmem + ICS_IDENT_OFFSET) & 1;
699 type |= (readb(idmem + ICS_IDENT_OFFSET + 4) & 1) << 1;
700 type |= (readb(idmem + ICS_IDENT_OFFSET + 8) & 1) << 2;
701 type |= (readb(idmem + ICS_IDENT_OFFSET + 12) & 1) << 3;
Russell King10bdaaa2007-05-10 18:40:51 +0100702 ecardm_iounmap(ec, idmem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703
704 state->type = type;
705 }
706
707 switch (state->type) {
708 case ICS_TYPE_A3IN:
709 dev_warn(&ec->dev, "A3IN unsupported\n");
710 ret = -ENODEV;
711 break;
712
713 case ICS_TYPE_A3USER:
714 dev_warn(&ec->dev, "A3USER unsupported\n");
715 ret = -ENODEV;
716 break;
717
718 case ICS_TYPE_V5:
719 ret = icside_register_v5(state, ec);
720 break;
721
722 case ICS_TYPE_V6:
723 ret = icside_register_v6(state, ec);
724 break;
725
726 default:
727 dev_warn(&ec->dev, "unknown interface type\n");
728 ret = -ENODEV;
729 break;
730 }
731
732 if (ret == 0) {
733 ecard_set_drvdata(ec, state);
734 goto out;
735 }
736
737 kfree(state);
738 release:
739 ecard_release_resources(ec);
740 out:
741 return ret;
742}
743
744static void __devexit icside_remove(struct expansion_card *ec)
745{
746 struct icside_state *state = ecard_get_drvdata(ec);
747
748 switch (state->type) {
749 case ICS_TYPE_V5:
750 /* FIXME: tell IDE to stop using the interface */
751
752 /* Disable interrupts */
753 icside_irqdisable_arcin_v5(ec, 0);
754 break;
755
756 case ICS_TYPE_V6:
757 /* FIXME: tell IDE to stop using the interface */
758 if (ec->dma != NO_DMA)
759 free_dma(ec->dma);
760
761 /* Disable interrupts */
762 icside_irqdisable_arcin_v6(ec, 0);
763
764 /* Reset the ROM pointer/EASI selection */
765 writeb(0, state->ioc_base);
766 break;
767 }
768
769 ecard_set_drvdata(ec, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 kfree(state);
772 ecard_release_resources(ec);
773}
774
775static void icside_shutdown(struct expansion_card *ec)
776{
777 struct icside_state *state = ecard_get_drvdata(ec);
778 unsigned long flags;
779
780 /*
781 * Disable interrupts from this card. We need to do
782 * this before disabling EASI since we may be accessing
783 * this register via that region.
784 */
785 local_irq_save(flags);
786 ec->ops->irqdisable(ec, 0);
787 local_irq_restore(flags);
788
789 /*
790 * Reset the ROM pointer so that we can read the ROM
791 * after a soft reboot. This also disables access to
792 * the IDE taskfile via the EASI region.
793 */
794 if (state->ioc_base)
795 writeb(0, state->ioc_base);
796}
797
798static const struct ecard_id icside_ids[] = {
799 { MANU_ICS, PROD_ICS_IDE },
800 { MANU_ICS2, PROD_ICS2_IDE },
801 { 0xffff, 0xffff }
802};
803
804static struct ecard_driver icside_driver = {
805 .probe = icside_probe,
806 .remove = __devexit_p(icside_remove),
807 .shutdown = icside_shutdown,
808 .id_table = icside_ids,
809 .drv = {
810 .name = "icside",
811 },
812};
813
814static int __init icside_init(void)
815{
816 return ecard_register_driver(&icside_driver);
817}
818
819MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
820MODULE_LICENSE("GPL");
821MODULE_DESCRIPTION("ICS IDE driver");
822
823module_init(icside_init);