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Ben Dooks0d1bb412009-06-14 13:52:37 +01001/* linux/drivers/mmc/host/sdhci-s3c.c
2 *
3 * Copyright 2008 Openmoko Inc.
4 * Copyright 2008 Simtec Electronics
5 * Ben Dooks <ben@simtec.co.uk>
6 * http://armlinux.simtec.co.uk/
7 *
8 * SDHCI (HSMMC) support for Samsung SoC
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15#include <linux/delay.h>
16#include <linux/dma-mapping.h>
17#include <linux/platform_device.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090018#include <linux/slab.h>
Ben Dooks0d1bb412009-06-14 13:52:37 +010019#include <linux/clk.h>
20#include <linux/io.h>
Marek Szyprowski17866e12010-08-10 18:01:58 -070021#include <linux/gpio.h>
Mark Brown55156d22011-07-29 15:35:00 +010022#include <linux/module.h>
Mark Brownd5e9c022012-03-03 00:46:41 +000023#include <linux/of.h>
24#include <linux/of_gpio.h>
25#include <linux/pm.h>
Mark Brown9f4e8152012-03-31 23:31:55 -040026#include <linux/pm_runtime.h>
Tomasz Figab96efcc2012-11-16 15:28:17 +010027#include <linux/pinctrl/consumer.h>
Ben Dooks0d1bb412009-06-14 13:52:37 +010028
29#include <linux/mmc/host.h>
30
31#include <plat/sdhci.h>
32#include <plat/regs-sdhci.h>
33
34#include "sdhci.h"
35
36#define MAX_BUS_CLK (4)
37
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +000038/* Number of gpio's used is max data bus width + command and clock lines */
39#define NUM_GPIOS(x) (x + 2)
40
Ben Dooks0d1bb412009-06-14 13:52:37 +010041/**
42 * struct sdhci_s3c - S3C SDHCI instance
43 * @host: The SDHCI host created
44 * @pdev: The platform device we where created from.
45 * @ioarea: The resource created when we claimed the IO area.
46 * @pdata: The platform data for this controller.
47 * @cur_clk: The index of the current bus clock.
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +000048 * @gpios: List of gpio numbers parsed from device tree.
Ben Dooks0d1bb412009-06-14 13:52:37 +010049 * @clk_io: The clock for the internal bus interface.
50 * @clk_bus: The clocks that are available for the SD/MMC bus clock.
51 */
52struct sdhci_s3c {
53 struct sdhci_host *host;
54 struct platform_device *pdev;
55 struct resource *ioarea;
56 struct s3c_sdhci_platdata *pdata;
57 unsigned int cur_clk;
Marek Szyprowski17866e12010-08-10 18:01:58 -070058 int ext_cd_irq;
59 int ext_cd_gpio;
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +000060 int *gpios;
Tomasz Figab96efcc2012-11-16 15:28:17 +010061 struct pinctrl *pctrl;
Ben Dooks0d1bb412009-06-14 13:52:37 +010062
63 struct clk *clk_io;
64 struct clk *clk_bus[MAX_BUS_CLK];
65};
66
Thomas Abraham3119936a2012-02-16 22:23:58 +090067/**
68 * struct sdhci_s3c_driver_data - S3C SDHCI platform specific driver data
69 * @sdhci_quirks: sdhci host specific quirks.
70 *
71 * Specifies platform specific configuration of sdhci controller.
72 * Note: A structure for driver specific platform data is used for future
73 * expansion of its usage.
74 */
75struct sdhci_s3c_drv_data {
76 unsigned int sdhci_quirks;
77};
78
Ben Dooks0d1bb412009-06-14 13:52:37 +010079static inline struct sdhci_s3c *to_s3c(struct sdhci_host *host)
80{
81 return sdhci_priv(host);
82}
83
84/**
85 * get_curclk - convert ctrl2 register to clock source number
86 * @ctrl2: Control2 register value.
87 */
88static u32 get_curclk(u32 ctrl2)
89{
90 ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK;
91 ctrl2 >>= S3C_SDHCI_CTRL2_SELBASECLK_SHIFT;
92
93 return ctrl2;
94}
95
96static void sdhci_s3c_check_sclk(struct sdhci_host *host)
97{
98 struct sdhci_s3c *ourhost = to_s3c(host);
99 u32 tmp = readl(host->ioaddr + S3C_SDHCI_CONTROL2);
100
101 if (get_curclk(tmp) != ourhost->cur_clk) {
102 dev_dbg(&ourhost->pdev->dev, "restored ctrl2 clock setting\n");
103
104 tmp &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK;
105 tmp |= ourhost->cur_clk << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT;
Jingoo Han7003fec2011-12-14 13:25:46 +0900106 writel(tmp, host->ioaddr + S3C_SDHCI_CONTROL2);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100107 }
108}
109
110/**
111 * sdhci_s3c_get_max_clk - callback to get maximum clock frequency.
112 * @host: The SDHCI host instance.
113 *
114 * Callback to return the maximum clock rate acheivable by the controller.
115*/
116static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host)
117{
118 struct sdhci_s3c *ourhost = to_s3c(host);
119 struct clk *busclk;
120 unsigned int rate, max;
121 int clk;
122
123 /* note, a reset will reset the clock source */
124
125 sdhci_s3c_check_sclk(host);
126
127 for (max = 0, clk = 0; clk < MAX_BUS_CLK; clk++) {
128 busclk = ourhost->clk_bus[clk];
129 if (!busclk)
130 continue;
131
132 rate = clk_get_rate(busclk);
133 if (rate > max)
134 max = rate;
135 }
136
137 return max;
138}
139
Ben Dooks0d1bb412009-06-14 13:52:37 +0100140/**
141 * sdhci_s3c_consider_clock - consider one the bus clocks for current setting
142 * @ourhost: Our SDHCI instance.
143 * @src: The source clock index.
144 * @wanted: The clock frequency wanted.
145 */
146static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost,
147 unsigned int src,
148 unsigned int wanted)
149{
150 unsigned long rate;
151 struct clk *clksrc = ourhost->clk_bus[src];
152 int div;
153
154 if (!clksrc)
155 return UINT_MAX;
156
Jeongbae Seo253e0a72010-10-08 17:46:21 +0900157 /*
Thomas Abraham3119936a2012-02-16 22:23:58 +0900158 * If controller uses a non-standard clock division, find the best clock
159 * speed possible with selected clock source and skip the division.
Jeongbae Seo253e0a72010-10-08 17:46:21 +0900160 */
Thomas Abraham3119936a2012-02-16 22:23:58 +0900161 if (ourhost->host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) {
Jeongbae Seo253e0a72010-10-08 17:46:21 +0900162 rate = clk_round_rate(clksrc, wanted);
163 return wanted - rate;
164 }
165
Ben Dooks0d1bb412009-06-14 13:52:37 +0100166 rate = clk_get_rate(clksrc);
167
168 for (div = 1; div < 256; div *= 2) {
169 if ((rate / div) <= wanted)
170 break;
171 }
172
173 dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n",
174 src, rate, wanted, rate / div);
175
Jingoo Han2ad0b242012-08-29 14:35:06 +0900176 return wanted - (rate / div);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100177}
178
179/**
180 * sdhci_s3c_set_clock - callback on clock change
181 * @host: The SDHCI host being changed
182 * @clock: The clock rate being requested.
183 *
184 * When the card's clock is going to be changed, look at the new frequency
185 * and find the best clock source to go with it.
186*/
187static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock)
188{
189 struct sdhci_s3c *ourhost = to_s3c(host);
190 unsigned int best = UINT_MAX;
191 unsigned int delta;
192 int best_src = 0;
193 int src;
194 u32 ctrl;
195
196 /* don't bother if the clock is going off. */
197 if (clock == 0)
198 return;
199
200 for (src = 0; src < MAX_BUS_CLK; src++) {
201 delta = sdhci_s3c_consider_clock(ourhost, src, clock);
202 if (delta < best) {
203 best = delta;
204 best_src = src;
205 }
206 }
207
208 dev_dbg(&ourhost->pdev->dev,
209 "selected source %d, clock %d, delta %d\n",
210 best_src, clock, best);
211
212 /* select the new clock source */
Ben Dooks0d1bb412009-06-14 13:52:37 +0100213 if (ourhost->cur_clk != best_src) {
214 struct clk *clk = ourhost->clk_bus[best_src];
215
Thomas Abraham0f310a02012-10-03 08:35:43 +0900216 clk_prepare_enable(clk);
217 clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]);
Chander Kashyape684c462012-09-14 09:08:49 +0000218
Ben Dooks0d1bb412009-06-14 13:52:37 +0100219 /* turn clock off to card before changing clock source */
220 writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
221
222 ourhost->cur_clk = best_src;
223 host->max_clk = clk_get_rate(clk);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100224
225 ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2);
226 ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK;
227 ctrl |= best_src << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT;
228 writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2);
229 }
230
Thomas Abraham6fe47172011-09-14 12:39:17 +0530231 /* reprogram default hardware configuration */
232 writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA,
233 host->ioaddr + S3C64XX_SDHCI_CONTROL4);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100234
Thomas Abraham6fe47172011-09-14 12:39:17 +0530235 ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2);
236 ctrl |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |
237 S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |
238 S3C_SDHCI_CTRL2_ENFBCLKRX |
239 S3C_SDHCI_CTRL2_DFCNT_NONE |
240 S3C_SDHCI_CTRL2_ENCLKOUTHOLD);
241 writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100242
Thomas Abraham6fe47172011-09-14 12:39:17 +0530243 /* reconfigure the controller for new clock rate */
244 ctrl = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0);
245 if (clock < 25 * 1000000)
246 ctrl |= (S3C_SDHCI_CTRL3_FCSEL3 | S3C_SDHCI_CTRL3_FCSEL2);
247 writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL3);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100248}
249
Marek Szyprowskice5f0362010-08-10 18:01:56 -0700250/**
251 * sdhci_s3c_get_min_clock - callback to get minimal supported clock value
252 * @host: The SDHCI host being queried
253 *
254 * To init mmc host properly a minimal clock value is needed. For high system
255 * bus clock's values the standard formula gives values out of allowed range.
256 * The clock still can be set to lower values, if clock source other then
257 * system bus is selected.
258*/
259static unsigned int sdhci_s3c_get_min_clock(struct sdhci_host *host)
260{
261 struct sdhci_s3c *ourhost = to_s3c(host);
262 unsigned int delta, min = UINT_MAX;
263 int src;
264
265 for (src = 0; src < MAX_BUS_CLK; src++) {
266 delta = sdhci_s3c_consider_clock(ourhost, src, 0);
267 if (delta == UINT_MAX)
268 continue;
269 /* delta is a negative value in this case */
270 if (-delta < min)
271 min = -delta;
272 }
273 return min;
274}
275
Jeongbae Seo253e0a72010-10-08 17:46:21 +0900276/* sdhci_cmu_get_max_clk - callback to get maximum clock frequency.*/
277static unsigned int sdhci_cmu_get_max_clock(struct sdhci_host *host)
278{
279 struct sdhci_s3c *ourhost = to_s3c(host);
280
281 return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], UINT_MAX);
282}
283
284/* sdhci_cmu_get_min_clock - callback to get minimal supported clock value. */
285static unsigned int sdhci_cmu_get_min_clock(struct sdhci_host *host)
286{
287 struct sdhci_s3c *ourhost = to_s3c(host);
288
289 /*
290 * initial clock can be in the frequency range of
291 * 100KHz-400KHz, so we set it as max value.
292 */
293 return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], 400000);
294}
295
296/* sdhci_cmu_set_clock - callback on clock change.*/
297static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock)
298{
299 struct sdhci_s3c *ourhost = to_s3c(host);
Jingoo Han2ad0b242012-08-29 14:35:06 +0900300 struct device *dev = &ourhost->pdev->dev;
Thomas Abraham3119936a2012-02-16 22:23:58 +0900301 unsigned long timeout;
302 u16 clk = 0;
Jeongbae Seo253e0a72010-10-08 17:46:21 +0900303
304 /* don't bother if the clock is going off */
305 if (clock == 0)
306 return;
307
308 sdhci_s3c_set_clock(host, clock);
309
310 clk_set_rate(ourhost->clk_bus[ourhost->cur_clk], clock);
311
312 host->clock = clock;
Thomas Abraham3119936a2012-02-16 22:23:58 +0900313
314 clk = SDHCI_CLOCK_INT_EN;
315 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
316
317 /* Wait max 20 ms */
318 timeout = 20;
319 while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
320 & SDHCI_CLOCK_INT_STABLE)) {
321 if (timeout == 0) {
Jingoo Han2ad0b242012-08-29 14:35:06 +0900322 dev_err(dev, "%s: Internal clock never stabilised.\n",
323 mmc_hostname(host->mmc));
Thomas Abraham3119936a2012-02-16 22:23:58 +0900324 return;
325 }
326 timeout--;
327 mdelay(1);
328 }
329
330 clk |= SDHCI_CLOCK_CARD_EN;
331 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
Jeongbae Seo253e0a72010-10-08 17:46:21 +0900332}
333
Jaehoon Chung548f07d2011-01-12 11:59:12 +0900334/**
335 * sdhci_s3c_platform_8bit_width - support 8bit buswidth
336 * @host: The SDHCI host being queried
337 * @width: MMC_BUS_WIDTH_ macro for the bus width being requested
338 *
339 * We have 8-bit width support but is not a v3 controller.
340 * So we add platform_8bit_width() and support 8bit width.
341 */
342static int sdhci_s3c_platform_8bit_width(struct sdhci_host *host, int width)
343{
344 u8 ctrl;
345
346 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
347
348 switch (width) {
349 case MMC_BUS_WIDTH_8:
350 ctrl |= SDHCI_CTRL_8BITBUS;
351 ctrl &= ~SDHCI_CTRL_4BITBUS;
352 break;
353 case MMC_BUS_WIDTH_4:
354 ctrl |= SDHCI_CTRL_4BITBUS;
355 ctrl &= ~SDHCI_CTRL_8BITBUS;
356 break;
357 default:
Girish K S49bb1e62011-08-26 14:58:18 +0530358 ctrl &= ~SDHCI_CTRL_4BITBUS;
359 ctrl &= ~SDHCI_CTRL_8BITBUS;
Jaehoon Chung548f07d2011-01-12 11:59:12 +0900360 break;
361 }
362
363 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
364
365 return 0;
366}
367
Ben Dooks0d1bb412009-06-14 13:52:37 +0100368static struct sdhci_ops sdhci_s3c_ops = {
369 .get_max_clock = sdhci_s3c_get_max_clk,
Ben Dooks0d1bb412009-06-14 13:52:37 +0100370 .set_clock = sdhci_s3c_set_clock,
Marek Szyprowskice5f0362010-08-10 18:01:56 -0700371 .get_min_clock = sdhci_s3c_get_min_clock,
Jaehoon Chung548f07d2011-01-12 11:59:12 +0900372 .platform_8bit_width = sdhci_s3c_platform_8bit_width,
Ben Dooks0d1bb412009-06-14 13:52:37 +0100373};
374
Marek Szyprowski17866e12010-08-10 18:01:58 -0700375static void sdhci_s3c_notify_change(struct platform_device *dev, int state)
376{
377 struct sdhci_host *host = platform_get_drvdata(dev);
Sachin Kamat4577f772012-12-04 17:03:07 +0530378#ifdef CONFIG_PM_RUNTIME
Heiko Stübnerfe007c02012-11-18 19:50:05 +0100379 struct sdhci_s3c *sc = sdhci_priv(host);
Sachin Kamat4577f772012-12-04 17:03:07 +0530380#endif
Marek Szyprowski06fe5772010-09-20 15:03:42 +0200381 unsigned long flags;
382
Marek Szyprowski17866e12010-08-10 18:01:58 -0700383 if (host) {
Marek Szyprowski06fe5772010-09-20 15:03:42 +0200384 spin_lock_irqsave(&host->lock, flags);
Marek Szyprowski17866e12010-08-10 18:01:58 -0700385 if (state) {
386 dev_dbg(&dev->dev, "card inserted.\n");
Heiko Stübnerfe007c02012-11-18 19:50:05 +0100387#ifdef CONFIG_PM_RUNTIME
388 clk_prepare_enable(sc->clk_io);
389#endif
Marek Szyprowski17866e12010-08-10 18:01:58 -0700390 host->flags &= ~SDHCI_DEVICE_DEAD;
391 host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
392 } else {
393 dev_dbg(&dev->dev, "card removed.\n");
394 host->flags |= SDHCI_DEVICE_DEAD;
395 host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
Heiko Stübnerfe007c02012-11-18 19:50:05 +0100396#ifdef CONFIG_PM_RUNTIME
397 clk_disable_unprepare(sc->clk_io);
398#endif
Marek Szyprowski17866e12010-08-10 18:01:58 -0700399 }
Kyungmin Parkf5228862010-08-19 14:13:37 -0700400 tasklet_schedule(&host->card_tasklet);
Marek Szyprowski06fe5772010-09-20 15:03:42 +0200401 spin_unlock_irqrestore(&host->lock, flags);
Marek Szyprowski17866e12010-08-10 18:01:58 -0700402 }
403}
404
405static irqreturn_t sdhci_s3c_gpio_card_detect_thread(int irq, void *dev_id)
406{
407 struct sdhci_s3c *sc = dev_id;
408 int status = gpio_get_value(sc->ext_cd_gpio);
409 if (sc->pdata->ext_cd_gpio_invert)
410 status = !status;
411 sdhci_s3c_notify_change(sc->pdev, status);
412 return IRQ_HANDLED;
413}
414
415static void sdhci_s3c_setup_card_detect_gpio(struct sdhci_s3c *sc)
416{
417 struct s3c_sdhci_platdata *pdata = sc->pdata;
418 struct device *dev = &sc->pdev->dev;
419
Tomasz Figab1b8fea2012-11-25 15:40:44 -0500420 if (devm_gpio_request(dev, pdata->ext_cd_gpio, "SDHCI EXT CD") == 0) {
Marek Szyprowski17866e12010-08-10 18:01:58 -0700421 sc->ext_cd_gpio = pdata->ext_cd_gpio;
422 sc->ext_cd_irq = gpio_to_irq(pdata->ext_cd_gpio);
423 if (sc->ext_cd_irq &&
424 request_threaded_irq(sc->ext_cd_irq, NULL,
425 sdhci_s3c_gpio_card_detect_thread,
Jingoo Han2ad0b242012-08-29 14:35:06 +0900426 IRQF_TRIGGER_RISING |
427 IRQF_TRIGGER_FALLING |
428 IRQF_ONESHOT,
Marek Szyprowski17866e12010-08-10 18:01:58 -0700429 dev_name(dev), sc) == 0) {
430 int status = gpio_get_value(sc->ext_cd_gpio);
431 if (pdata->ext_cd_gpio_invert)
432 status = !status;
433 sdhci_s3c_notify_change(sc->pdev, status);
434 } else {
435 dev_warn(dev, "cannot request irq for card detect\n");
436 sc->ext_cd_irq = 0;
437 }
438 } else {
439 dev_err(dev, "cannot request gpio for card detect\n");
440 }
441}
442
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000443#ifdef CONFIG_OF
Bill Pembertonc3be1ef2012-11-19 13:23:06 -0500444static int sdhci_s3c_parse_dt(struct device *dev,
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000445 struct sdhci_host *host, struct s3c_sdhci_platdata *pdata)
446{
447 struct device_node *node = dev->of_node;
448 struct sdhci_s3c *ourhost = to_s3c(host);
449 u32 max_width;
450 int gpio, cnt, ret;
451
452 /* if the bus-width property is not specified, assume width as 1 */
453 if (of_property_read_u32(node, "bus-width", &max_width))
454 max_width = 1;
455 pdata->max_width = max_width;
456
457 ourhost->gpios = devm_kzalloc(dev, NUM_GPIOS(pdata->max_width) *
458 sizeof(int), GFP_KERNEL);
459 if (!ourhost->gpios)
460 return -ENOMEM;
461
462 /* get the card detection method */
Tushar Beheraab5023e2012-11-20 09:41:53 +0530463 if (of_get_property(node, "broken-cd", NULL)) {
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000464 pdata->cd_type = S3C_SDHCI_CD_NONE;
465 goto setup_bus;
466 }
467
Tushar Beheraab5023e2012-11-20 09:41:53 +0530468 if (of_get_property(node, "non-removable", NULL)) {
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000469 pdata->cd_type = S3C_SDHCI_CD_PERMANENT;
470 goto setup_bus;
471 }
472
473 gpio = of_get_named_gpio(node, "cd-gpios", 0);
474 if (gpio_is_valid(gpio)) {
475 pdata->cd_type = S3C_SDHCI_CD_GPIO;
476 goto found_cd;
477 } else if (gpio != -ENOENT) {
478 dev_err(dev, "invalid card detect gpio specified\n");
479 return -EINVAL;
480 }
481
482 gpio = of_get_named_gpio(node, "samsung,cd-pinmux-gpio", 0);
483 if (gpio_is_valid(gpio)) {
484 pdata->cd_type = S3C_SDHCI_CD_INTERNAL;
485 goto found_cd;
486 } else if (gpio != -ENOENT) {
487 dev_err(dev, "invalid card detect gpio specified\n");
488 return -EINVAL;
489 }
490
Tomasz Figab96efcc2012-11-16 15:28:17 +0100491 /* assuming internal card detect that will be configured by pinctrl */
492 pdata->cd_type = S3C_SDHCI_CD_INTERNAL;
493 goto setup_bus;
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000494
495 found_cd:
496 if (pdata->cd_type == S3C_SDHCI_CD_GPIO) {
497 pdata->ext_cd_gpio = gpio;
498 ourhost->ext_cd_gpio = -1;
499 if (of_get_property(node, "cd-inverted", NULL))
500 pdata->ext_cd_gpio_invert = 1;
501 } else if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
Tomasz Figab1b8fea2012-11-25 15:40:44 -0500502 ret = devm_gpio_request(dev, gpio, "sdhci-cd");
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000503 if (ret) {
504 dev_err(dev, "card detect gpio request failed\n");
505 return -EINVAL;
506 }
507 ourhost->ext_cd_gpio = gpio;
508 }
509
510 setup_bus:
Tomasz Figab96efcc2012-11-16 15:28:17 +0100511 if (!IS_ERR(ourhost->pctrl))
512 return 0;
513
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000514 /* get the gpios for command, clock and data lines */
515 for (cnt = 0; cnt < NUM_GPIOS(pdata->max_width); cnt++) {
516 gpio = of_get_gpio(node, cnt);
517 if (!gpio_is_valid(gpio)) {
518 dev_err(dev, "invalid gpio[%d]\n", cnt);
Tomasz Figab1b8fea2012-11-25 15:40:44 -0500519 return -EINVAL;
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000520 }
521 ourhost->gpios[cnt] = gpio;
522 }
523
524 for (cnt = 0; cnt < NUM_GPIOS(pdata->max_width); cnt++) {
Tomasz Figab1b8fea2012-11-25 15:40:44 -0500525 ret = devm_gpio_request(dev, ourhost->gpios[cnt], "sdhci-gpio");
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000526 if (ret) {
527 dev_err(dev, "gpio[%d] request failed\n", cnt);
Tomasz Figab1b8fea2012-11-25 15:40:44 -0500528 return -EINVAL;
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000529 }
530 }
531
532 return 0;
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000533}
534#else
Bill Pembertonc3be1ef2012-11-19 13:23:06 -0500535static int sdhci_s3c_parse_dt(struct device *dev,
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000536 struct sdhci_host *host, struct s3c_sdhci_platdata *pdata)
537{
538 return -EINVAL;
539}
540#endif
541
542static const struct of_device_id sdhci_s3c_dt_match[];
543
Thomas Abraham3119936a2012-02-16 22:23:58 +0900544static inline struct sdhci_s3c_drv_data *sdhci_s3c_get_driver_data(
545 struct platform_device *pdev)
546{
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000547#ifdef CONFIG_OF
548 if (pdev->dev.of_node) {
549 const struct of_device_id *match;
550 match = of_match_node(sdhci_s3c_dt_match, pdev->dev.of_node);
551 return (struct sdhci_s3c_drv_data *)match->data;
552 }
553#endif
Thomas Abraham3119936a2012-02-16 22:23:58 +0900554 return (struct sdhci_s3c_drv_data *)
555 platform_get_device_id(pdev)->driver_data;
556}
557
Bill Pembertonc3be1ef2012-11-19 13:23:06 -0500558static int sdhci_s3c_probe(struct platform_device *pdev)
Ben Dooks0d1bb412009-06-14 13:52:37 +0100559{
Thomas Abraham1d4dc332012-02-16 22:23:59 +0900560 struct s3c_sdhci_platdata *pdata;
Thomas Abraham3119936a2012-02-16 22:23:58 +0900561 struct sdhci_s3c_drv_data *drv_data;
Ben Dooks0d1bb412009-06-14 13:52:37 +0100562 struct device *dev = &pdev->dev;
563 struct sdhci_host *host;
564 struct sdhci_s3c *sc;
565 struct resource *res;
566 int ret, irq, ptr, clks;
567
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000568 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
Ben Dooks0d1bb412009-06-14 13:52:37 +0100569 dev_err(dev, "no device data specified\n");
570 return -ENOENT;
571 }
572
573 irq = platform_get_irq(pdev, 0);
574 if (irq < 0) {
575 dev_err(dev, "no irq specified\n");
576 return irq;
577 }
578
Ben Dooks0d1bb412009-06-14 13:52:37 +0100579 host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c));
580 if (IS_ERR(host)) {
581 dev_err(dev, "sdhci_alloc_host() failed\n");
582 return PTR_ERR(host);
583 }
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000584 sc = sdhci_priv(host);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100585
Thomas Abraham1d4dc332012-02-16 22:23:59 +0900586 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
587 if (!pdata) {
588 ret = -ENOMEM;
Tomasz Figab1b8fea2012-11-25 15:40:44 -0500589 goto err_pdata_io_clk;
Thomas Abraham1d4dc332012-02-16 22:23:59 +0900590 }
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000591
Tomasz Figab96efcc2012-11-16 15:28:17 +0100592 sc->pctrl = devm_pinctrl_get_select_default(&pdev->dev);
593
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000594 if (pdev->dev.of_node) {
595 ret = sdhci_s3c_parse_dt(&pdev->dev, host, pdata);
596 if (ret)
Tomasz Figab1b8fea2012-11-25 15:40:44 -0500597 goto err_pdata_io_clk;
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000598 } else {
599 memcpy(pdata, pdev->dev.platform_data, sizeof(*pdata));
600 sc->ext_cd_gpio = -1; /* invalid gpio number */
601 }
Thomas Abraham1d4dc332012-02-16 22:23:59 +0900602
Thomas Abraham3119936a2012-02-16 22:23:58 +0900603 drv_data = sdhci_s3c_get_driver_data(pdev);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100604
605 sc->host = host;
606 sc->pdev = pdev;
607 sc->pdata = pdata;
608
609 platform_set_drvdata(pdev, host);
610
611 sc->clk_io = clk_get(dev, "hsmmc");
612 if (IS_ERR(sc->clk_io)) {
613 dev_err(dev, "failed to get io clock\n");
614 ret = PTR_ERR(sc->clk_io);
Tomasz Figab1b8fea2012-11-25 15:40:44 -0500615 goto err_pdata_io_clk;
Ben Dooks0d1bb412009-06-14 13:52:37 +0100616 }
617
618 /* enable the local io clock and keep it running for the moment. */
Thomas Abraham0f310a02012-10-03 08:35:43 +0900619 clk_prepare_enable(sc->clk_io);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100620
621 for (clks = 0, ptr = 0; ptr < MAX_BUS_CLK; ptr++) {
622 struct clk *clk;
Rajeshwari Shinde4346b6d2011-11-03 10:52:58 +0900623 char name[14];
Ben Dooks0d1bb412009-06-14 13:52:37 +0100624
Rajeshwari Shinde4346b6d2011-11-03 10:52:58 +0900625 snprintf(name, 14, "mmc_busclk.%d", ptr);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100626 clk = clk_get(dev, name);
Jingoo Han2ad0b242012-08-29 14:35:06 +0900627 if (IS_ERR(clk))
Ben Dooks0d1bb412009-06-14 13:52:37 +0100628 continue;
Ben Dooks0d1bb412009-06-14 13:52:37 +0100629
630 clks++;
631 sc->clk_bus[ptr] = clk;
Jeongbae Seo253e0a72010-10-08 17:46:21 +0900632
633 /*
634 * save current clock index to know which clock bus
635 * is used later in overriding functions.
636 */
637 sc->cur_clk = ptr;
638
Ben Dooks0d1bb412009-06-14 13:52:37 +0100639 dev_info(dev, "clock source %d: %s (%ld Hz)\n",
640 ptr, name, clk_get_rate(clk));
641 }
642
643 if (clks == 0) {
644 dev_err(dev, "failed to find any bus clocks\n");
645 ret = -ENOENT;
646 goto err_no_busclks;
647 }
648
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000649#ifndef CONFIG_PM_RUNTIME
Thomas Abraham0f310a02012-10-03 08:35:43 +0900650 clk_prepare_enable(sc->clk_bus[sc->cur_clk]);
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000651#endif
Chander Kashyape684c462012-09-14 09:08:49 +0000652
Julia Lawall9bda6da2012-03-08 23:24:53 -0500653 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
654 host->ioaddr = devm_request_and_ioremap(&pdev->dev, res);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100655 if (!host->ioaddr) {
656 dev_err(dev, "failed to map registers\n");
657 ret = -ENXIO;
658 goto err_req_regs;
659 }
660
661 /* Ensure we have minimal gpio selected CMD/CLK/Detect */
662 if (pdata->cfg_gpio)
663 pdata->cfg_gpio(pdev, pdata->max_width);
664
665 host->hw_name = "samsung-hsmmc";
666 host->ops = &sdhci_s3c_ops;
667 host->quirks = 0;
668 host->irq = irq;
669
670 /* Setup quirks for the controller */
Thomas Abrahamb2e75ef2010-05-26 14:42:05 -0700671 host->quirks |= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC;
Marek Szyprowskia1d56462010-08-10 18:01:57 -0700672 host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT;
Thomas Abraham3119936a2012-02-16 22:23:58 +0900673 if (drv_data)
674 host->quirks |= drv_data->sdhci_quirks;
Ben Dooks0d1bb412009-06-14 13:52:37 +0100675
676#ifndef CONFIG_MMC_SDHCI_S3C_DMA
677
678 /* we currently see overruns on errors, so disable the SDMA
679 * support as well. */
680 host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
681
Ben Dooks0d1bb412009-06-14 13:52:37 +0100682#endif /* CONFIG_MMC_SDHCI_S3C_DMA */
683
684 /* It seems we do not get an DATA transfer complete on non-busy
685 * transfers, not sure if this is a problem with this specific
686 * SDHCI block, or a missing configuration that needs to be set. */
687 host->quirks |= SDHCI_QUIRK_NO_BUSY_IRQ;
688
Kyungmin Park732f0e32010-10-30 12:58:56 +0900689 /* This host supports the Auto CMD12 */
690 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
691
Jaehoon Chung7199e2b2011-07-12 17:30:47 +0900692 /* Samsung SoCs need BROKEN_ADMA_ZEROLEN_DESC */
693 host->quirks |= SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC;
694
Marek Szyprowski17866e12010-08-10 18:01:58 -0700695 if (pdata->cd_type == S3C_SDHCI_CD_NONE ||
696 pdata->cd_type == S3C_SDHCI_CD_PERMANENT)
697 host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
698
699 if (pdata->cd_type == S3C_SDHCI_CD_PERMANENT)
700 host->mmc->caps = MMC_CAP_NONREMOVABLE;
701
Thomas Abraham0d22c772012-03-31 23:29:45 -0400702 switch (pdata->max_width) {
703 case 8:
704 host->mmc->caps |= MMC_CAP_8_BIT_DATA;
705 case 4:
706 host->mmc->caps |= MMC_CAP_4_BIT_DATA;
707 break;
708 }
709
Sangwook Leefa1773c2011-11-07 17:05:22 +0000710 if (pdata->pm_caps)
711 host->mmc->pm_caps |= pdata->pm_caps;
712
Ben Dooks0d1bb412009-06-14 13:52:37 +0100713 host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR |
714 SDHCI_QUIRK_32BIT_DMA_SIZE);
715
Hyuk Lee3fe42e02010-08-10 18:01:55 -0700716 /* HSMMC on Samsung SoCs uses SDCLK as timeout clock */
717 host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK;
718
Jeongbae Seo253e0a72010-10-08 17:46:21 +0900719 /*
720 * If controller does not have internal clock divider,
721 * we can use overriding functions instead of default.
722 */
Thomas Abraham3119936a2012-02-16 22:23:58 +0900723 if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) {
Jeongbae Seo253e0a72010-10-08 17:46:21 +0900724 sdhci_s3c_ops.set_clock = sdhci_cmu_set_clock;
725 sdhci_s3c_ops.get_min_clock = sdhci_cmu_get_min_clock;
726 sdhci_s3c_ops.get_max_clock = sdhci_cmu_get_max_clock;
727 }
728
Jeongbae Seob3824f22010-10-08 17:46:20 +0900729 /* It supports additional host capabilities if needed */
730 if (pdata->host_caps)
731 host->mmc->caps |= pdata->host_caps;
732
Jaehoon Chungc1c4b662012-02-07 15:59:01 +0900733 if (pdata->host_caps2)
734 host->mmc->caps2 |= pdata->host_caps2;
735
Mark Brown9f4e8152012-03-31 23:31:55 -0400736 pm_runtime_enable(&pdev->dev);
737 pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
738 pm_runtime_use_autosuspend(&pdev->dev);
739 pm_suspend_ignore_children(&pdev->dev, 1);
740
Ben Dooks0d1bb412009-06-14 13:52:37 +0100741 ret = sdhci_add_host(host);
742 if (ret) {
743 dev_err(dev, "sdhci_add_host() failed\n");
Mark Brown9f4e8152012-03-31 23:31:55 -0400744 pm_runtime_forbid(&pdev->dev);
745 pm_runtime_get_noresume(&pdev->dev);
Julia Lawall9bda6da2012-03-08 23:24:53 -0500746 goto err_req_regs;
Ben Dooks0d1bb412009-06-14 13:52:37 +0100747 }
748
Marek Szyprowski17866e12010-08-10 18:01:58 -0700749 /* The following two methods of card detection might call
750 sdhci_s3c_notify_change() immediately, so they can be called
751 only after sdhci_add_host(). Setup errors are ignored. */
752 if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_init)
753 pdata->ext_cd_init(&sdhci_s3c_notify_change);
754 if (pdata->cd_type == S3C_SDHCI_CD_GPIO &&
755 gpio_is_valid(pdata->ext_cd_gpio))
756 sdhci_s3c_setup_card_detect_gpio(sc);
757
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000758#ifdef CONFIG_PM_RUNTIME
Seungwon Jeon0aa55c22012-10-30 14:28:36 +0900759 if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL)
760 clk_disable_unprepare(sc->clk_io);
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000761#endif
Ben Dooks0d1bb412009-06-14 13:52:37 +0100762 return 0;
763
Ben Dooks0d1bb412009-06-14 13:52:37 +0100764 err_req_regs:
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000765#ifndef CONFIG_PM_RUNTIME
Thomas Abraham0f310a02012-10-03 08:35:43 +0900766 clk_disable_unprepare(sc->clk_bus[sc->cur_clk]);
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000767#endif
Ben Dooks0d1bb412009-06-14 13:52:37 +0100768 for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) {
Jaehoon Chung326adda2011-10-12 13:14:29 +0900769 if (sc->clk_bus[ptr]) {
Jaehoon Chung326adda2011-10-12 13:14:29 +0900770 clk_put(sc->clk_bus[ptr]);
771 }
Ben Dooks0d1bb412009-06-14 13:52:37 +0100772 }
773
774 err_no_busclks:
Thomas Abraham0f310a02012-10-03 08:35:43 +0900775 clk_disable_unprepare(sc->clk_io);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100776 clk_put(sc->clk_io);
777
Tomasz Figab1b8fea2012-11-25 15:40:44 -0500778 err_pdata_io_clk:
Ben Dooks0d1bb412009-06-14 13:52:37 +0100779 sdhci_free_host(host);
780
781 return ret;
782}
783
Bill Pemberton6e0ee712012-11-19 13:26:03 -0500784static int sdhci_s3c_remove(struct platform_device *pdev)
Ben Dooks0d1bb412009-06-14 13:52:37 +0100785{
Marek Szyprowski9d51a6b2010-07-20 13:24:33 -0700786 struct sdhci_host *host = platform_get_drvdata(pdev);
787 struct sdhci_s3c *sc = sdhci_priv(host);
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000788 struct s3c_sdhci_platdata *pdata = sc->pdata;
Marek Szyprowski9d51a6b2010-07-20 13:24:33 -0700789 int ptr;
790
Marek Szyprowski17866e12010-08-10 18:01:58 -0700791 if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_cleanup)
792 pdata->ext_cd_cleanup(&sdhci_s3c_notify_change);
793
794 if (sc->ext_cd_irq)
795 free_irq(sc->ext_cd_irq, sc);
796
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000797#ifdef CONFIG_PM_RUNTIME
Seungwon Jeon0aa55c22012-10-30 14:28:36 +0900798 if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL)
799 clk_prepare_enable(sc->clk_io);
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000800#endif
Marek Szyprowski9d51a6b2010-07-20 13:24:33 -0700801 sdhci_remove_host(host, 1);
802
Chander Kashyap387a8cbd2012-09-14 09:08:50 +0000803 pm_runtime_dont_use_autosuspend(&pdev->dev);
Mark Brown9f4e8152012-03-31 23:31:55 -0400804 pm_runtime_disable(&pdev->dev);
805
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000806#ifndef CONFIG_PM_RUNTIME
Thomas Abraham0f310a02012-10-03 08:35:43 +0900807 clk_disable_unprepare(sc->clk_bus[sc->cur_clk]);
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000808#endif
Jaehoon Chung5feb54a2012-09-19 14:43:33 +0800809 for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) {
Marek Szyprowski9320f7c2010-09-23 16:22:05 +0200810 if (sc->clk_bus[ptr]) {
Marek Szyprowski9320f7c2010-09-23 16:22:05 +0200811 clk_put(sc->clk_bus[ptr]);
812 }
Marek Szyprowski9d51a6b2010-07-20 13:24:33 -0700813 }
Thomas Abraham0f310a02012-10-03 08:35:43 +0900814 clk_disable_unprepare(sc->clk_io);
Marek Szyprowski9d51a6b2010-07-20 13:24:33 -0700815 clk_put(sc->clk_io);
816
Marek Szyprowski9d51a6b2010-07-20 13:24:33 -0700817 sdhci_free_host(host);
818 platform_set_drvdata(pdev, NULL);
819
Ben Dooks0d1bb412009-06-14 13:52:37 +0100820 return 0;
821}
822
Mark Brownd5e9c022012-03-03 00:46:41 +0000823#ifdef CONFIG_PM_SLEEP
Manuel Lauss29495aa2011-11-03 11:09:45 +0100824static int sdhci_s3c_suspend(struct device *dev)
Ben Dooks0d1bb412009-06-14 13:52:37 +0100825{
Manuel Lauss29495aa2011-11-03 11:09:45 +0100826 struct sdhci_host *host = dev_get_drvdata(dev);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100827
Manuel Lauss29495aa2011-11-03 11:09:45 +0100828 return sdhci_suspend_host(host);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100829}
830
Manuel Lauss29495aa2011-11-03 11:09:45 +0100831static int sdhci_s3c_resume(struct device *dev)
Ben Dooks0d1bb412009-06-14 13:52:37 +0100832{
Manuel Lauss29495aa2011-11-03 11:09:45 +0100833 struct sdhci_host *host = dev_get_drvdata(dev);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100834
Wonil Choi65d13512011-06-29 11:38:38 +0900835 return sdhci_resume_host(host);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100836}
Mark Brownd5e9c022012-03-03 00:46:41 +0000837#endif
Ben Dooks0d1bb412009-06-14 13:52:37 +0100838
Mark Brown9f4e8152012-03-31 23:31:55 -0400839#ifdef CONFIG_PM_RUNTIME
840static int sdhci_s3c_runtime_suspend(struct device *dev)
841{
842 struct sdhci_host *host = dev_get_drvdata(dev);
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000843 struct sdhci_s3c *ourhost = to_s3c(host);
844 struct clk *busclk = ourhost->clk_io;
845 int ret;
Mark Brown9f4e8152012-03-31 23:31:55 -0400846
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000847 ret = sdhci_runtime_suspend_host(host);
848
Thomas Abraham0f310a02012-10-03 08:35:43 +0900849 clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]);
850 clk_disable_unprepare(busclk);
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000851 return ret;
Mark Brown9f4e8152012-03-31 23:31:55 -0400852}
853
854static int sdhci_s3c_runtime_resume(struct device *dev)
855{
856 struct sdhci_host *host = dev_get_drvdata(dev);
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000857 struct sdhci_s3c *ourhost = to_s3c(host);
858 struct clk *busclk = ourhost->clk_io;
859 int ret;
Mark Brown9f4e8152012-03-31 23:31:55 -0400860
Thomas Abraham0f310a02012-10-03 08:35:43 +0900861 clk_prepare_enable(busclk);
862 clk_prepare_enable(ourhost->clk_bus[ourhost->cur_clk]);
Chander Kashyap2abeb5c2012-09-21 05:42:08 +0000863 ret = sdhci_runtime_resume_host(host);
864 return ret;
Mark Brown9f4e8152012-03-31 23:31:55 -0400865}
866#endif
867
Mark Brownd5e9c022012-03-03 00:46:41 +0000868#ifdef CONFIG_PM
Manuel Lauss29495aa2011-11-03 11:09:45 +0100869static const struct dev_pm_ops sdhci_s3c_pmops = {
Mark Brownd5e9c022012-03-03 00:46:41 +0000870 SET_SYSTEM_SLEEP_PM_OPS(sdhci_s3c_suspend, sdhci_s3c_resume)
Mark Brown9f4e8152012-03-31 23:31:55 -0400871 SET_RUNTIME_PM_OPS(sdhci_s3c_runtime_suspend, sdhci_s3c_runtime_resume,
872 NULL)
Manuel Lauss29495aa2011-11-03 11:09:45 +0100873};
874
875#define SDHCI_S3C_PMOPS (&sdhci_s3c_pmops)
876
Ben Dooks0d1bb412009-06-14 13:52:37 +0100877#else
Manuel Lauss29495aa2011-11-03 11:09:45 +0100878#define SDHCI_S3C_PMOPS NULL
Ben Dooks0d1bb412009-06-14 13:52:37 +0100879#endif
880
Thomas Abraham3119936a2012-02-16 22:23:58 +0900881#if defined(CONFIG_CPU_EXYNOS4210) || defined(CONFIG_SOC_EXYNOS4212)
882static struct sdhci_s3c_drv_data exynos4_sdhci_drv_data = {
883 .sdhci_quirks = SDHCI_QUIRK_NONSTANDARD_CLOCK,
884};
885#define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)&exynos4_sdhci_drv_data)
886#else
887#define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)NULL)
888#endif
889
890static struct platform_device_id sdhci_s3c_driver_ids[] = {
891 {
892 .name = "s3c-sdhci",
893 .driver_data = (kernel_ulong_t)NULL,
894 }, {
895 .name = "exynos4-sdhci",
896 .driver_data = EXYNOS4_SDHCI_DRV_DATA,
897 },
898 { }
899};
900MODULE_DEVICE_TABLE(platform, sdhci_s3c_driver_ids);
901
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000902#ifdef CONFIG_OF
903static const struct of_device_id sdhci_s3c_dt_match[] = {
904 { .compatible = "samsung,s3c6410-sdhci", },
905 { .compatible = "samsung,exynos4210-sdhci",
906 .data = (void *)EXYNOS4_SDHCI_DRV_DATA },
907 {},
908};
909MODULE_DEVICE_TABLE(of, sdhci_s3c_dt_match);
910#endif
911
Ben Dooks0d1bb412009-06-14 13:52:37 +0100912static struct platform_driver sdhci_s3c_driver = {
913 .probe = sdhci_s3c_probe,
Bill Pemberton0433c142012-11-19 13:20:26 -0500914 .remove = sdhci_s3c_remove,
Thomas Abraham3119936a2012-02-16 22:23:58 +0900915 .id_table = sdhci_s3c_driver_ids,
Ben Dooks0d1bb412009-06-14 13:52:37 +0100916 .driver = {
917 .owner = THIS_MODULE,
918 .name = "s3c-sdhci",
Thomas Abrahamcd1b00e2012-08-23 17:10:09 +0000919 .of_match_table = of_match_ptr(sdhci_s3c_dt_match),
Manuel Lauss29495aa2011-11-03 11:09:45 +0100920 .pm = SDHCI_S3C_PMOPS,
Ben Dooks0d1bb412009-06-14 13:52:37 +0100921 },
922};
923
Axel Lind1f81a62011-11-26 12:55:43 +0800924module_platform_driver(sdhci_s3c_driver);
Ben Dooks0d1bb412009-06-14 13:52:37 +0100925
926MODULE_DESCRIPTION("Samsung SDHCI (HSMMC) glue");
927MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
928MODULE_LICENSE("GPL v2");
929MODULE_ALIAS("platform:s3c-sdhci");