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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / ata / pata_samsung_cf.c
bloba79566d056666f0d0449785856b679492d71456b
1 /*
2 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
3 * http://www.samsung.com
4 *
5 * PATA driver for Samsung SoCs.
6 * Supports CF Interface in True IDE mode. Currently only PIO mode has been
7 * implemented; UDMA support has to be added.
8 *
9 * Based on:
10 * PATA driver for AT91SAM9260 Static Memory Controller
11 * PATA driver for Toshiba SCC controller
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License version 2
15 * as published by the Free Software Foundation.
16 */
17
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/clk.h>
22 #include <linux/libata.h>
23 #include <linux/platform_device.h>
24 #include <linux/slab.h>
25
26 #include <linux/platform_data/ata-samsung_cf.h>
27
28 #define DRV_NAME "pata_samsung_cf"
29 #define DRV_VERSION "0.1"
30
31 #define S3C_CFATA_REG(x) (x)
32 #define S3C_CFATA_MUX S3C_CFATA_REG(0x0)
33 #define S3C_ATA_CTRL S3C_CFATA_REG(0x0)
34 #define S3C_ATA_CMD S3C_CFATA_REG(0x8)
35 #define S3C_ATA_IRQ S3C_CFATA_REG(0x10)
36 #define S3C_ATA_IRQ_MSK S3C_CFATA_REG(0x14)
37 #define S3C_ATA_CFG S3C_CFATA_REG(0x18)
38
39 #define S3C_ATA_PIO_TIME S3C_CFATA_REG(0x2c)
40 #define S3C_ATA_PIO_DTR S3C_CFATA_REG(0x54)
41 #define S3C_ATA_PIO_FED S3C_CFATA_REG(0x58)
42 #define S3C_ATA_PIO_SCR S3C_CFATA_REG(0x5c)
43 #define S3C_ATA_PIO_LLR S3C_CFATA_REG(0x60)
44 #define S3C_ATA_PIO_LMR S3C_CFATA_REG(0x64)
45 #define S3C_ATA_PIO_LHR S3C_CFATA_REG(0x68)
46 #define S3C_ATA_PIO_DVR S3C_CFATA_REG(0x6c)
47 #define S3C_ATA_PIO_CSD S3C_CFATA_REG(0x70)
48 #define S3C_ATA_PIO_DAD S3C_CFATA_REG(0x74)
49 #define S3C_ATA_PIO_RDATA S3C_CFATA_REG(0x7c)
50
51 #define S3C_CFATA_MUX_TRUEIDE 0x01
52 #define S3C_ATA_CFG_SWAP 0x40
53 #define S3C_ATA_CFG_IORDYEN 0x02
54
55 enum s3c_cpu_type {
56 TYPE_S3C64XX,
57 TYPE_S5PC100,
58 TYPE_S5PV210,
59 };
60
61 /*
62 * struct s3c_ide_info - S3C PATA instance.
63 * @clk: The clock resource for this controller.
64 * @ide_addr: The area mapped for the hardware registers.
65 * @sfr_addr: The area mapped for the special function registers.
66 * @irq: The IRQ number we are using.
67 * @cpu_type: The exact type of this controller.
68 * @fifo_status_reg: The ATA_FIFO_STATUS register offset.
69 */
70 struct s3c_ide_info {
71 struct clk *clk;
72 void __iomem *ide_addr;
73 void __iomem *sfr_addr;
74 unsigned int irq;
75 enum s3c_cpu_type cpu_type;
76 unsigned int fifo_status_reg;
77 };
78
79 static void pata_s3c_set_endian(void __iomem *s3c_ide_regbase, u8 mode)
80 {
81 u32 reg = readl(s3c_ide_regbase + S3C_ATA_CFG);
82 reg = mode ? (reg & ~S3C_ATA_CFG_SWAP) : (reg | S3C_ATA_CFG_SWAP);
83 writel(reg, s3c_ide_regbase + S3C_ATA_CFG);
84 }
85
86 static void pata_s3c_cfg_mode(void __iomem *s3c_ide_sfrbase)
87 {
88 /* Select true-ide as the internal operating mode */
89 writel(readl(s3c_ide_sfrbase + S3C_CFATA_MUX) | S3C_CFATA_MUX_TRUEIDE,
90 s3c_ide_sfrbase + S3C_CFATA_MUX);
91 }
92
93 static unsigned long
94 pata_s3c_setup_timing(struct s3c_ide_info *info, const struct ata_timing *ata)
95 {
96 int t1 = ata->setup;
97 int t2 = ata->act8b;
98 int t2i = ata->rec8b;
99 ulong piotime;
100
101 piotime = ((t2i & 0xff) << 12) | ((t2 & 0xff) << 4) | (t1 & 0xf);
102
103 return piotime;
104 }
105
106 static void pata_s3c_set_piomode(struct ata_port *ap, struct ata_device *adev)
107 {
108 struct s3c_ide_info *info = ap->host->private_data;
109 struct ata_timing timing;
110 int cycle_time;
111 ulong ata_cfg = readl(info->ide_addr + S3C_ATA_CFG);
112 ulong piotime;
113
114 /* Enables IORDY if mode requires it */
115 if (ata_pio_need_iordy(adev))
116 ata_cfg |= S3C_ATA_CFG_IORDYEN;
117 else
118 ata_cfg &= ~S3C_ATA_CFG_IORDYEN;
119
120 cycle_time = (int)(1000000000UL / clk_get_rate(info->clk));
121
122 ata_timing_compute(adev, adev->pio_mode, &timing,
123 cycle_time * 1000, 0);
124
125 piotime = pata_s3c_setup_timing(info, &timing);
126
127 writel(ata_cfg, info->ide_addr + S3C_ATA_CFG);
128 writel(piotime, info->ide_addr + S3C_ATA_PIO_TIME);
129 }
130
131 /*
132 * Waits until the IDE controller is able to perform next read/write
133 * operation to the disk. Needed for 64XX series boards only.
134 */
135 static int wait_for_host_ready(struct s3c_ide_info *info)
136 {
137 ulong timeout;
138 void __iomem *fifo_reg = info->ide_addr + info->fifo_status_reg;
139
140 /* wait for maximum of 20 msec */
141 timeout = jiffies + msecs_to_jiffies(20);
142 while (time_before(jiffies, timeout)) {
143 if ((readl(fifo_reg) >> 28) == 0)
144 return 0;
145 }
146 return -EBUSY;
147 }
148
149 /*
150 * Writes to one of the task file registers.
151 */
152 static void ata_outb(struct ata_host *host, u8 addr, void __iomem *reg)
153 {
154 struct s3c_ide_info *info = host->private_data;
155
156 wait_for_host_ready(info);
157 writeb(addr, reg);
158 }
159
160 /*
161 * Reads from one of the task file registers.
162 */
163 static u8 ata_inb(struct ata_host *host, void __iomem *reg)
164 {
165 struct s3c_ide_info *info = host->private_data;
166 u8 temp;
167
168 wait_for_host_ready(info);
169 (void) readb(reg);
170 wait_for_host_ready(info);
171 temp = readb(info->ide_addr + S3C_ATA_PIO_RDATA);
172 return temp;
173 }
174
175 /*
176 * pata_s3c_tf_load - send taskfile registers to host controller
177 */
178 static void pata_s3c_tf_load(struct ata_port *ap,
179 const struct ata_taskfile *tf)
180 {
181 struct ata_ioports *ioaddr = &ap->ioaddr;
182 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
183
184 if (tf->ctl != ap->last_ctl) {
185 ata_outb(ap->host, tf->ctl, ioaddr->ctl_addr);
186 ap->last_ctl = tf->ctl;
187 ata_wait_idle(ap);
188 }
189
190 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
191 ata_outb(ap->host, tf->hob_feature, ioaddr->feature_addr);
192 ata_outb(ap->host, tf->hob_nsect, ioaddr->nsect_addr);
193 ata_outb(ap->host, tf->hob_lbal, ioaddr->lbal_addr);
194 ata_outb(ap->host, tf->hob_lbam, ioaddr->lbam_addr);
195 ata_outb(ap->host, tf->hob_lbah, ioaddr->lbah_addr);
196 }
197
198 if (is_addr) {
199 ata_outb(ap->host, tf->feature, ioaddr->feature_addr);
200 ata_outb(ap->host, tf->nsect, ioaddr->nsect_addr);
201 ata_outb(ap->host, tf->lbal, ioaddr->lbal_addr);
202 ata_outb(ap->host, tf->lbam, ioaddr->lbam_addr);
203 ata_outb(ap->host, tf->lbah, ioaddr->lbah_addr);
204 }
205
206 if (tf->flags & ATA_TFLAG_DEVICE)
207 ata_outb(ap->host, tf->device, ioaddr->device_addr);
208
209 ata_wait_idle(ap);
210 }
211
212 /*
213 * pata_s3c_tf_read - input device's ATA taskfile shadow registers
214 */
215 static void pata_s3c_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
216 {
217 struct ata_ioports *ioaddr = &ap->ioaddr;
218
219 tf->feature = ata_inb(ap->host, ioaddr->error_addr);
220 tf->nsect = ata_inb(ap->host, ioaddr->nsect_addr);
221 tf->lbal = ata_inb(ap->host, ioaddr->lbal_addr);
222 tf->lbam = ata_inb(ap->host, ioaddr->lbam_addr);
223 tf->lbah = ata_inb(ap->host, ioaddr->lbah_addr);
224 tf->device = ata_inb(ap->host, ioaddr->device_addr);
225
226 if (tf->flags & ATA_TFLAG_LBA48) {
227 ata_outb(ap->host, tf->ctl | ATA_HOB, ioaddr->ctl_addr);
228 tf->hob_feature = ata_inb(ap->host, ioaddr->error_addr);
229 tf->hob_nsect = ata_inb(ap->host, ioaddr->nsect_addr);
230 tf->hob_lbal = ata_inb(ap->host, ioaddr->lbal_addr);
231 tf->hob_lbam = ata_inb(ap->host, ioaddr->lbam_addr);
232 tf->hob_lbah = ata_inb(ap->host, ioaddr->lbah_addr);
233 ata_outb(ap->host, tf->ctl, ioaddr->ctl_addr);
234 ap->last_ctl = tf->ctl;
235 }
236 }
237
238 /*
239 * pata_s3c_exec_command - issue ATA command to host controller
240 */
241 static void pata_s3c_exec_command(struct ata_port *ap,
242 const struct ata_taskfile *tf)
243 {
244 ata_outb(ap->host, tf->command, ap->ioaddr.command_addr);
245 ata_sff_pause(ap);
246 }
247
248 /*
249 * pata_s3c_check_status - Read device status register
250 */
251 static u8 pata_s3c_check_status(struct ata_port *ap)
252 {
253 return ata_inb(ap->host, ap->ioaddr.status_addr);
254 }
255
256 /*
257 * pata_s3c_check_altstatus - Read alternate device status register
258 */
259 static u8 pata_s3c_check_altstatus(struct ata_port *ap)
260 {
261 return ata_inb(ap->host, ap->ioaddr.altstatus_addr);
262 }
263
264 /*
265 * pata_s3c_data_xfer - Transfer data by PIO
266 */
267 static unsigned int pata_s3c_data_xfer(struct ata_device *dev,
268 unsigned char *buf, unsigned int buflen, int rw)
269 {
270 struct ata_port *ap = dev->link->ap;
271 struct s3c_ide_info *info = ap->host->private_data;
272 void __iomem *data_addr = ap->ioaddr.data_addr;
273 unsigned int words = buflen >> 1, i;
274 u16 *data_ptr = (u16 *)buf;
275
276 /* Requires wait same as in ata_inb/ata_outb */
277 if (rw == READ)
278 for (i = 0; i < words; i++, data_ptr++) {
279 wait_for_host_ready(info);
280 (void) readw(data_addr);
281 wait_for_host_ready(info);
282 *data_ptr = readw(info->ide_addr
283 + S3C_ATA_PIO_RDATA);
284 }
285 else
286 for (i = 0; i < words; i++, data_ptr++) {
287 wait_for_host_ready(info);
288 writew(*data_ptr, data_addr);
289 }
290
291 if (buflen & 0x01)
292 dev_err(ap->dev, "unexpected trailing data\n");
293
294 return words << 1;
295 }
296
297 /*
298 * pata_s3c_dev_select - Select device on ATA bus
299 */
300 static void pata_s3c_dev_select(struct ata_port *ap, unsigned int device)
301 {
302 u8 tmp = ATA_DEVICE_OBS;
303
304 if (device != 0)
305 tmp |= ATA_DEV1;
306
307 ata_outb(ap->host, tmp, ap->ioaddr.device_addr);
308 ata_sff_pause(ap);
309 }
310
311 /*
312 * pata_s3c_devchk - PATA device presence detection
313 */
314 static unsigned int pata_s3c_devchk(struct ata_port *ap,
315 unsigned int device)
316 {
317 struct ata_ioports *ioaddr = &ap->ioaddr;
318 u8 nsect, lbal;
319
320 pata_s3c_dev_select(ap, device);
321
322 ata_outb(ap->host, 0x55, ioaddr->nsect_addr);
323 ata_outb(ap->host, 0xaa, ioaddr->lbal_addr);
324
325 ata_outb(ap->host, 0xaa, ioaddr->nsect_addr);
326 ata_outb(ap->host, 0x55, ioaddr->lbal_addr);
327
328 ata_outb(ap->host, 0x55, ioaddr->nsect_addr);
329 ata_outb(ap->host, 0xaa, ioaddr->lbal_addr);
330
331 nsect = ata_inb(ap->host, ioaddr->nsect_addr);
332 lbal = ata_inb(ap->host, ioaddr->lbal_addr);
333
334 if ((nsect == 0x55) && (lbal == 0xaa))
335 return 1; /* we found a device */
336
337 return 0; /* nothing found */
338 }
339
340 /*
341 * pata_s3c_wait_after_reset - wait for devices to become ready after reset
342 */
343 static int pata_s3c_wait_after_reset(struct ata_link *link,
344 unsigned long deadline)
345 {
346 int rc;
347
348 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
349
350 /* always check readiness of the master device */
351 rc = ata_sff_wait_ready(link, deadline);
352 /* -ENODEV means the odd clown forgot the D7 pulldown resistor
353 * and TF status is 0xff, bail out on it too.
354 */
355 if (rc)
356 return rc;
357
358 return 0;
359 }
360
361 /*
362 * pata_s3c_bus_softreset - PATA device software reset
363 */
364 static unsigned int pata_s3c_bus_softreset(struct ata_port *ap,
365 unsigned long deadline)
366 {
367 struct ata_ioports *ioaddr = &ap->ioaddr;
368
369 /* software reset. causes dev0 to be selected */
370 ata_outb(ap->host, ap->ctl, ioaddr->ctl_addr);
371 udelay(20);
372 ata_outb(ap->host, ap->ctl | ATA_SRST, ioaddr->ctl_addr);
373 udelay(20);
374 ata_outb(ap->host, ap->ctl, ioaddr->ctl_addr);
375 ap->last_ctl = ap->ctl;
376
377 return pata_s3c_wait_after_reset(&ap->link, deadline);
378 }
379
380 /*
381 * pata_s3c_softreset - reset host port via ATA SRST
382 */
383 static int pata_s3c_softreset(struct ata_link *link, unsigned int *classes,
384 unsigned long deadline)
385 {
386 struct ata_port *ap = link->ap;
387 unsigned int devmask = 0;
388 int rc;
389 u8 err;
390
391 /* determine if device 0 is present */
392 if (pata_s3c_devchk(ap, 0))
393 devmask |= (1 << 0);
394
395 /* select device 0 again */
396 pata_s3c_dev_select(ap, 0);
397
398 /* issue bus reset */
399 rc = pata_s3c_bus_softreset(ap, deadline);
400 /* if link is occupied, -ENODEV too is an error */
401 if (rc && rc != -ENODEV) {
402 ata_link_err(link, "SRST failed (errno=%d)\n", rc);
403 return rc;
404 }
405
406 /* determine by signature whether we have ATA or ATAPI devices */
407 classes[0] = ata_sff_dev_classify(&ap->link.device[0],
408 devmask & (1 << 0), &err);
409
410 return 0;
411 }
412
413 /*
414 * pata_s3c_set_devctl - Write device control register
415 */
416 static void pata_s3c_set_devctl(struct ata_port *ap, u8 ctl)
417 {
418 ata_outb(ap->host, ctl, ap->ioaddr.ctl_addr);
419 }
420
421 static struct scsi_host_template pata_s3c_sht = {
422 ATA_PIO_SHT(DRV_NAME),
423 };
424
425 static struct ata_port_operations pata_s3c_port_ops = {
426 .inherits = &ata_sff_port_ops,
427 .sff_check_status = pata_s3c_check_status,
428 .sff_check_altstatus = pata_s3c_check_altstatus,
429 .sff_tf_load = pata_s3c_tf_load,
430 .sff_tf_read = pata_s3c_tf_read,
431 .sff_data_xfer = pata_s3c_data_xfer,
432 .sff_exec_command = pata_s3c_exec_command,
433 .sff_dev_select = pata_s3c_dev_select,
434 .sff_set_devctl = pata_s3c_set_devctl,
435 .softreset = pata_s3c_softreset,
436 .set_piomode = pata_s3c_set_piomode,
437 };
438
439 static struct ata_port_operations pata_s5p_port_ops = {
440 .inherits = &ata_sff_port_ops,
441 .set_piomode = pata_s3c_set_piomode,
442 };
443
444 static void pata_s3c_enable(void __iomem *s3c_ide_regbase, bool state)
445 {
446 u32 temp = readl(s3c_ide_regbase + S3C_ATA_CTRL);
447 temp = state ? (temp | 1) : (temp & ~1);
448 writel(temp, s3c_ide_regbase + S3C_ATA_CTRL);
449 }
450
451 static irqreturn_t pata_s3c_irq(int irq, void *dev_instance)
452 {
453 struct ata_host *host = dev_instance;
454 struct s3c_ide_info *info = host->private_data;
455 u32 reg;
456
457 reg = readl(info->ide_addr + S3C_ATA_IRQ);
458 writel(reg, info->ide_addr + S3C_ATA_IRQ);
459
460 return ata_sff_interrupt(irq, dev_instance);
461 }
462
463 static void pata_s3c_hwinit(struct s3c_ide_info *info,
464 struct s3c_ide_platdata *pdata)
465 {
466 switch (info->cpu_type) {
467 case TYPE_S3C64XX:
468 /* Configure as big endian */
469 pata_s3c_cfg_mode(info->sfr_addr);
470 pata_s3c_set_endian(info->ide_addr, 1);
471 pata_s3c_enable(info->ide_addr, true);
472 msleep(100);
473
474 /* Remove IRQ Status */
475 writel(0x1f, info->ide_addr + S3C_ATA_IRQ);
476 writel(0x1b, info->ide_addr + S3C_ATA_IRQ_MSK);
477 break;
478
479 case TYPE_S5PC100:
480 pata_s3c_cfg_mode(info->sfr_addr);
481 /* FALLTHROUGH */
482
483 case TYPE_S5PV210:
484 /* Configure as little endian */
485 pata_s3c_set_endian(info->ide_addr, 0);
486 pata_s3c_enable(info->ide_addr, true);
487 msleep(100);
488
489 /* Remove IRQ Status */
490 writel(0x3f, info->ide_addr + S3C_ATA_IRQ);
491 writel(0x3f, info->ide_addr + S3C_ATA_IRQ_MSK);
492 break;
493
494 default:
495 BUG();
496 }
497 }
498
499 static int __init pata_s3c_probe(struct platform_device *pdev)
500 {
501 struct s3c_ide_platdata *pdata = dev_get_platdata(&pdev->dev);
502 struct device *dev = &pdev->dev;
503 struct s3c_ide_info *info;
504 struct resource *res;
505 struct ata_port *ap;
506 struct ata_host *host;
507 enum s3c_cpu_type cpu_type;
508 int ret;
509
510 cpu_type = platform_get_device_id(pdev)->driver_data;
511
512 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
513 if (!info) {
514 dev_err(dev, "failed to allocate memory for device data\n");
515 return -ENOMEM;
516 }
517
518 info->irq = platform_get_irq(pdev, 0);
519
520 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
521
522 info->ide_addr = devm_ioremap_resource(dev, res);
523 if (IS_ERR(info->ide_addr))
524 return PTR_ERR(info->ide_addr);
525
526 info->clk = devm_clk_get(&pdev->dev, "cfcon");
527 if (IS_ERR(info->clk)) {
528 dev_err(dev, "failed to get access to cf controller clock\n");
529 ret = PTR_ERR(info->clk);
530 info->clk = NULL;
531 return ret;
532 }
533
534 clk_enable(info->clk);
535
536 /* init ata host */
537 host = ata_host_alloc(dev, 1);
538 if (!host) {
539 dev_err(dev, "failed to allocate ide host\n");
540 ret = -ENOMEM;
541 goto stop_clk;
542 }
543
544 ap = host->ports[0];
545 ap->pio_mask = ATA_PIO4;
546
547 if (cpu_type == TYPE_S3C64XX) {
548 ap->ops = &pata_s3c_port_ops;
549 info->sfr_addr = info->ide_addr + 0x1800;
550 info->ide_addr += 0x1900;
551 info->fifo_status_reg = 0x94;
552 } else if (cpu_type == TYPE_S5PC100) {
553 ap->ops = &pata_s5p_port_ops;
554 info->sfr_addr = info->ide_addr + 0x1800;
555 info->ide_addr += 0x1900;
556 info->fifo_status_reg = 0x84;
557 } else {
558 ap->ops = &pata_s5p_port_ops;
559 info->fifo_status_reg = 0x84;
560 }
561
562 info->cpu_type = cpu_type;
563
564 if (info->irq <= 0) {
565 ap->flags |= ATA_FLAG_PIO_POLLING;
566 info->irq = 0;
567 ata_port_desc(ap, "no IRQ, using PIO polling\n");
568 }
569
570 ap->ioaddr.cmd_addr = info->ide_addr + S3C_ATA_CMD;
571 ap->ioaddr.data_addr = info->ide_addr + S3C_ATA_PIO_DTR;
572 ap->ioaddr.error_addr = info->ide_addr + S3C_ATA_PIO_FED;
573 ap->ioaddr.feature_addr = info->ide_addr + S3C_ATA_PIO_FED;
574 ap->ioaddr.nsect_addr = info->ide_addr + S3C_ATA_PIO_SCR;
575 ap->ioaddr.lbal_addr = info->ide_addr + S3C_ATA_PIO_LLR;
576 ap->ioaddr.lbam_addr = info->ide_addr + S3C_ATA_PIO_LMR;
577 ap->ioaddr.lbah_addr = info->ide_addr + S3C_ATA_PIO_LHR;
578 ap->ioaddr.device_addr = info->ide_addr + S3C_ATA_PIO_DVR;
579 ap->ioaddr.status_addr = info->ide_addr + S3C_ATA_PIO_CSD;
580 ap->ioaddr.command_addr = info->ide_addr + S3C_ATA_PIO_CSD;
581 ap->ioaddr.altstatus_addr = info->ide_addr + S3C_ATA_PIO_DAD;
582 ap->ioaddr.ctl_addr = info->ide_addr + S3C_ATA_PIO_DAD;
583
584 ata_port_desc(ap, "mmio cmd 0x%llx ",
585 (unsigned long long)res->start);
586
587 host->private_data = info;
588
589 if (pdata && pdata->setup_gpio)
590 pdata->setup_gpio();
591
592 /* Set endianness and enable the interface */
593 pata_s3c_hwinit(info, pdata);
594
595 platform_set_drvdata(pdev, host);
596
597 return ata_host_activate(host, info->irq,
598 info->irq ? pata_s3c_irq : NULL,
599 0, &pata_s3c_sht);
600
601 stop_clk:
602 clk_disable(info->clk);
603 return ret;
604 }
605
606 static int __exit pata_s3c_remove(struct platform_device *pdev)
607 {
608 struct ata_host *host = platform_get_drvdata(pdev);
609 struct s3c_ide_info *info = host->private_data;
610
611 ata_host_detach(host);
612
613 clk_disable(info->clk);
614
615 return 0;
616 }
617
618 #ifdef CONFIG_PM
619 static int pata_s3c_suspend(struct device *dev)
620 {
621 struct platform_device *pdev = to_platform_device(dev);
622 struct ata_host *host = platform_get_drvdata(pdev);
623
624 return ata_host_suspend(host, PMSG_SUSPEND);
625 }
626
627 static int pata_s3c_resume(struct device *dev)
628 {
629 struct platform_device *pdev = to_platform_device(dev);
630 struct ata_host *host = platform_get_drvdata(pdev);
631 struct s3c_ide_platdata *pdata = dev_get_platdata(&pdev->dev);
632 struct s3c_ide_info *info = host->private_data;
633
634 pata_s3c_hwinit(info, pdata);
635 ata_host_resume(host);
636
637 return 0;
638 }
639
640 static const struct dev_pm_ops pata_s3c_pm_ops = {
641 .suspend = pata_s3c_suspend,
642 .resume = pata_s3c_resume,
643 };
644 #endif
645
646 /* driver device registration */
647 static struct platform_device_id pata_s3c_driver_ids[] = {
648 {
649 .name = "s3c64xx-pata",
650 .driver_data = TYPE_S3C64XX,
651 }, {
652 .name = "s5pc100-pata",
653 .driver_data = TYPE_S5PC100,
654 }, {
655 .name = "s5pv210-pata",
656 .driver_data = TYPE_S5PV210,
657 },
658 { }
659 };
660
661 MODULE_DEVICE_TABLE(platform, pata_s3c_driver_ids);
662
663 static struct platform_driver pata_s3c_driver = {
664 .remove = __exit_p(pata_s3c_remove),
665 .id_table = pata_s3c_driver_ids,
666 .driver = {
667 .name = DRV_NAME,
668 .owner = THIS_MODULE,
669 #ifdef CONFIG_PM
670 .pm = &pata_s3c_pm_ops,
671 #endif
672 },
673 };
674
675 module_platform_driver_probe(pata_s3c_driver, pata_s3c_probe);
676
677 MODULE_AUTHOR("Abhilash Kesavan, <a.kesavan@samsung.com>");
678 MODULE_DESCRIPTION("low-level driver for Samsung PATA controller");
679 MODULE_LICENSE("GPL");
680 MODULE_VERSION(DRV_VERSION);
Linux with added FPC-III support