1 /* linux/drivers/mmc/host/sdhci-s3c.c
3 * Copyright 2008 Openmoko Inc.
4 * Copyright 2008 Simtec Electronics
6 * http://armlinux.simtec.co.uk/
8 * SDHCI (HSMMC) support for Samsung SoC
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.
15 #include <linux/delay.h>
16 #include <linux/dma-mapping.h>
17 #include <linux/platform_device.h>
18 #include <linux/platform_data/mmc-sdhci-s3c.h>
19 #include <linux/slab.h>
20 #include <linux/clk.h>
22 #include <linux/gpio.h>
23 #include <linux/module.h>
25 #include <linux/of_gpio.h>
27 #include <linux/pm_runtime.h>
29 #include <linux/mmc/host.h>
31 #include "sdhci-s3c-regs.h"
34 #define MAX_BUS_CLK (4)
36 /* Number of gpio's used is max data bus width + command and clock lines */
37 #define NUM_GPIOS(x) (x + 2)
40 * struct sdhci_s3c - S3C SDHCI instance
41 * @host: The SDHCI host created
42 * @pdev: The platform device we where created from.
43 * @ioarea: The resource created when we claimed the IO area.
44 * @pdata: The platform data for this controller.
45 * @cur_clk: The index of the current bus clock.
46 * @clk_io: The clock for the internal bus interface.
47 * @clk_bus: The clocks that are available for the SD/MMC bus clock.
50 struct sdhci_host *host;
51 struct platform_device *pdev;
52 struct resource *ioarea;
53 struct s3c_sdhci_platdata *pdata;
59 struct clk *clk_bus[MAX_BUS_CLK];
60 unsigned long clk_rates[MAX_BUS_CLK];
64 * struct sdhci_s3c_driver_data - S3C SDHCI platform specific driver data
65 * @sdhci_quirks: sdhci host specific quirks.
67 * Specifies platform specific configuration of sdhci controller.
68 * Note: A structure for driver specific platform data is used for future
69 * expansion of its usage.
71 struct sdhci_s3c_drv_data {
72 unsigned int sdhci_quirks;
75 static inline struct sdhci_s3c *to_s3c(struct sdhci_host *host)
77 return sdhci_priv(host);
81 * sdhci_s3c_get_max_clk - callback to get maximum clock frequency.
82 * @host: The SDHCI host instance.
84 * Callback to return the maximum clock rate acheivable by the controller.
86 static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host)
88 struct sdhci_s3c *ourhost = to_s3c(host);
89 unsigned long rate, max = 0;
92 for (src = 0; src < MAX_BUS_CLK; src++) {
93 rate = ourhost->clk_rates[src];
102 * sdhci_s3c_consider_clock - consider one the bus clocks for current setting
103 * @ourhost: Our SDHCI instance.
104 * @src: The source clock index.
105 * @wanted: The clock frequency wanted.
107 static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost,
112 struct clk *clksrc = ourhost->clk_bus[src];
119 * If controller uses a non-standard clock division, find the best clock
120 * speed possible with selected clock source and skip the division.
122 if (ourhost->host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) {
123 rate = clk_round_rate(clksrc, wanted);
124 return wanted - rate;
127 rate = ourhost->clk_rates[src];
129 for (shift = 0; shift <= 8; ++shift) {
130 if ((rate >> shift) <= wanted)
135 dev_dbg(&ourhost->pdev->dev,
136 "clk %d: rate %ld, min rate %lu > wanted %u\n",
137 src, rate, rate / 256, wanted);
141 dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n",
142 src, rate, wanted, rate >> shift);
144 return wanted - (rate >> shift);
148 * sdhci_s3c_set_clock - callback on clock change
149 * @host: The SDHCI host being changed
150 * @clock: The clock rate being requested.
152 * When the card's clock is going to be changed, look at the new frequency
153 * and find the best clock source to go with it.
155 static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock)
157 struct sdhci_s3c *ourhost = to_s3c(host);
158 unsigned int best = UINT_MAX;
164 /* don't bother if the clock is going off. */
168 for (src = 0; src < MAX_BUS_CLK; src++) {
169 delta = sdhci_s3c_consider_clock(ourhost, src, clock);
176 dev_dbg(&ourhost->pdev->dev,
177 "selected source %d, clock %d, delta %d\n",
178 best_src, clock, best);
180 /* select the new clock source */
181 if (ourhost->cur_clk != best_src) {
182 struct clk *clk = ourhost->clk_bus[best_src];
184 clk_prepare_enable(clk);
185 if (ourhost->cur_clk >= 0)
186 clk_disable_unprepare(
187 ourhost->clk_bus[ourhost->cur_clk]);
189 ourhost->cur_clk = best_src;
190 host->max_clk = ourhost->clk_rates[best_src];
193 /* turn clock off to card before changing clock source */
194 writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
196 ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2);
197 ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK;
198 ctrl |= best_src << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT;
199 writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2);
201 /* reprogram default hardware configuration */
202 writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA,
203 host->ioaddr + S3C64XX_SDHCI_CONTROL4);
205 ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2);
206 ctrl |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |
207 S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |
208 S3C_SDHCI_CTRL2_ENFBCLKRX |
209 S3C_SDHCI_CTRL2_DFCNT_NONE |
210 S3C_SDHCI_CTRL2_ENCLKOUTHOLD);
211 writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2);
213 /* reconfigure the controller for new clock rate */
214 ctrl = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0);
215 if (clock < 25 * 1000000)
216 ctrl |= (S3C_SDHCI_CTRL3_FCSEL3 | S3C_SDHCI_CTRL3_FCSEL2);
217 writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL3);
221 * sdhci_s3c_get_min_clock - callback to get minimal supported clock value
222 * @host: The SDHCI host being queried
224 * To init mmc host properly a minimal clock value is needed. For high system
225 * bus clock's values the standard formula gives values out of allowed range.
226 * The clock still can be set to lower values, if clock source other then
227 * system bus is selected.
229 static unsigned int sdhci_s3c_get_min_clock(struct sdhci_host *host)
231 struct sdhci_s3c *ourhost = to_s3c(host);
232 unsigned long rate, min = ULONG_MAX;
235 for (src = 0; src < MAX_BUS_CLK; src++) {
236 rate = ourhost->clk_rates[src] / 256;
246 /* sdhci_cmu_get_max_clk - callback to get maximum clock frequency.*/
247 static unsigned int sdhci_cmu_get_max_clock(struct sdhci_host *host)
249 struct sdhci_s3c *ourhost = to_s3c(host);
250 unsigned long rate, max = 0;
253 for (src = 0; src < MAX_BUS_CLK; src++) {
256 clk = ourhost->clk_bus[src];
260 rate = clk_round_rate(clk, ULONG_MAX);
268 /* sdhci_cmu_get_min_clock - callback to get minimal supported clock value. */
269 static unsigned int sdhci_cmu_get_min_clock(struct sdhci_host *host)
271 struct sdhci_s3c *ourhost = to_s3c(host);
272 unsigned long rate, min = ULONG_MAX;
275 for (src = 0; src < MAX_BUS_CLK; src++) {
278 clk = ourhost->clk_bus[src];
282 rate = clk_round_rate(clk, 0);
290 /* sdhci_cmu_set_clock - callback on clock change.*/
291 static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock)
293 struct sdhci_s3c *ourhost = to_s3c(host);
294 struct device *dev = &ourhost->pdev->dev;
295 unsigned long timeout;
298 /* If the clock is going off, set to 0 at clock control register */
300 sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
305 sdhci_s3c_set_clock(host, clock);
307 clk_set_rate(ourhost->clk_bus[ourhost->cur_clk], clock);
311 clk = SDHCI_CLOCK_INT_EN;
312 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
316 while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
317 & SDHCI_CLOCK_INT_STABLE)) {
319 dev_err(dev, "%s: Internal clock never stabilised.\n",
320 mmc_hostname(host->mmc));
327 clk |= SDHCI_CLOCK_CARD_EN;
328 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
332 * sdhci_s3c_platform_bus_width - support 8bit buswidth
333 * @host: The SDHCI host being queried
334 * @width: MMC_BUS_WIDTH_ macro for the bus width being requested
336 * We have 8-bit width support but is not a v3 controller.
337 * So we add platform_bus_width() and support 8bit width.
339 static int sdhci_s3c_platform_bus_width(struct sdhci_host *host, int width)
343 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
346 case MMC_BUS_WIDTH_8:
347 ctrl |= SDHCI_CTRL_8BITBUS;
348 ctrl &= ~SDHCI_CTRL_4BITBUS;
350 case MMC_BUS_WIDTH_4:
351 ctrl |= SDHCI_CTRL_4BITBUS;
352 ctrl &= ~SDHCI_CTRL_8BITBUS;
355 ctrl &= ~SDHCI_CTRL_4BITBUS;
356 ctrl &= ~SDHCI_CTRL_8BITBUS;
360 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
365 static struct sdhci_ops sdhci_s3c_ops = {
366 .get_max_clock = sdhci_s3c_get_max_clk,
367 .set_clock = sdhci_s3c_set_clock,
368 .get_min_clock = sdhci_s3c_get_min_clock,
369 .platform_bus_width = sdhci_s3c_platform_bus_width,
372 static void sdhci_s3c_notify_change(struct platform_device *dev, int state)
374 struct sdhci_host *host = platform_get_drvdata(dev);
375 #ifdef CONFIG_PM_RUNTIME
376 struct sdhci_s3c *sc = sdhci_priv(host);
381 spin_lock_irqsave(&host->lock, flags);
383 dev_dbg(&dev->dev, "card inserted.\n");
384 #ifdef CONFIG_PM_RUNTIME
385 clk_prepare_enable(sc->clk_io);
387 host->flags &= ~SDHCI_DEVICE_DEAD;
388 host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
390 dev_dbg(&dev->dev, "card removed.\n");
391 host->flags |= SDHCI_DEVICE_DEAD;
392 host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
393 #ifdef CONFIG_PM_RUNTIME
394 clk_disable_unprepare(sc->clk_io);
397 tasklet_schedule(&host->card_tasklet);
398 spin_unlock_irqrestore(&host->lock, flags);
402 static irqreturn_t sdhci_s3c_gpio_card_detect_thread(int irq, void *dev_id)
404 struct sdhci_s3c *sc = dev_id;
405 int status = gpio_get_value(sc->ext_cd_gpio);
406 if (sc->pdata->ext_cd_gpio_invert)
408 sdhci_s3c_notify_change(sc->pdev, status);
412 static void sdhci_s3c_setup_card_detect_gpio(struct sdhci_s3c *sc)
414 struct s3c_sdhci_platdata *pdata = sc->pdata;
415 struct device *dev = &sc->pdev->dev;
417 if (devm_gpio_request(dev, pdata->ext_cd_gpio, "SDHCI EXT CD") == 0) {
418 sc->ext_cd_gpio = pdata->ext_cd_gpio;
419 sc->ext_cd_irq = gpio_to_irq(pdata->ext_cd_gpio);
420 if (sc->ext_cd_irq &&
421 request_threaded_irq(sc->ext_cd_irq, NULL,
422 sdhci_s3c_gpio_card_detect_thread,
423 IRQF_TRIGGER_RISING |
424 IRQF_TRIGGER_FALLING |
426 dev_name(dev), sc) == 0) {
427 int status = gpio_get_value(sc->ext_cd_gpio);
428 if (pdata->ext_cd_gpio_invert)
430 sdhci_s3c_notify_change(sc->pdev, status);
432 dev_warn(dev, "cannot request irq for card detect\n");
436 dev_err(dev, "cannot request gpio for card detect\n");
441 static int sdhci_s3c_parse_dt(struct device *dev,
442 struct sdhci_host *host, struct s3c_sdhci_platdata *pdata)
444 struct device_node *node = dev->of_node;
445 struct sdhci_s3c *ourhost = to_s3c(host);
449 /* if the bus-width property is not specified, assume width as 1 */
450 if (of_property_read_u32(node, "bus-width", &max_width))
452 pdata->max_width = max_width;
454 /* get the card detection method */
455 if (of_get_property(node, "broken-cd", NULL)) {
456 pdata->cd_type = S3C_SDHCI_CD_NONE;
460 if (of_get_property(node, "non-removable", NULL)) {
461 pdata->cd_type = S3C_SDHCI_CD_PERMANENT;
465 gpio = of_get_named_gpio(node, "cd-gpios", 0);
466 if (gpio_is_valid(gpio)) {
467 pdata->cd_type = S3C_SDHCI_CD_GPIO;
468 pdata->ext_cd_gpio = gpio;
469 ourhost->ext_cd_gpio = -1;
470 if (of_get_property(node, "cd-inverted", NULL))
471 pdata->ext_cd_gpio_invert = 1;
473 } else if (gpio != -ENOENT) {
474 dev_err(dev, "invalid card detect gpio specified\n");
478 /* assuming internal card detect that will be configured by pinctrl */
479 pdata->cd_type = S3C_SDHCI_CD_INTERNAL;
483 static int sdhci_s3c_parse_dt(struct device *dev,
484 struct sdhci_host *host, struct s3c_sdhci_platdata *pdata)
490 static const struct of_device_id sdhci_s3c_dt_match[];
492 static inline struct sdhci_s3c_drv_data *sdhci_s3c_get_driver_data(
493 struct platform_device *pdev)
496 if (pdev->dev.of_node) {
497 const struct of_device_id *match;
498 match = of_match_node(sdhci_s3c_dt_match, pdev->dev.of_node);
499 return (struct sdhci_s3c_drv_data *)match->data;
502 return (struct sdhci_s3c_drv_data *)
503 platform_get_device_id(pdev)->driver_data;
506 static int sdhci_s3c_probe(struct platform_device *pdev)
508 struct s3c_sdhci_platdata *pdata;
509 struct sdhci_s3c_drv_data *drv_data;
510 struct device *dev = &pdev->dev;
511 struct sdhci_host *host;
512 struct sdhci_s3c *sc;
513 struct resource *res;
514 int ret, irq, ptr, clks;
516 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
517 dev_err(dev, "no device data specified\n");
521 irq = platform_get_irq(pdev, 0);
523 dev_err(dev, "no irq specified\n");
527 host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c));
529 dev_err(dev, "sdhci_alloc_host() failed\n");
530 return PTR_ERR(host);
532 sc = sdhci_priv(host);
534 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
537 goto err_pdata_io_clk;
540 if (pdev->dev.of_node) {
541 ret = sdhci_s3c_parse_dt(&pdev->dev, host, pdata);
543 goto err_pdata_io_clk;
545 memcpy(pdata, pdev->dev.platform_data, sizeof(*pdata));
546 sc->ext_cd_gpio = -1; /* invalid gpio number */
549 drv_data = sdhci_s3c_get_driver_data(pdev);
556 platform_set_drvdata(pdev, host);
558 sc->clk_io = devm_clk_get(dev, "hsmmc");
559 if (IS_ERR(sc->clk_io)) {
560 dev_err(dev, "failed to get io clock\n");
561 ret = PTR_ERR(sc->clk_io);
562 goto err_pdata_io_clk;
565 /* enable the local io clock and keep it running for the moment. */
566 clk_prepare_enable(sc->clk_io);
568 for (clks = 0, ptr = 0; ptr < MAX_BUS_CLK; ptr++) {
571 snprintf(name, 14, "mmc_busclk.%d", ptr);
572 sc->clk_bus[ptr] = devm_clk_get(dev, name);
573 if (IS_ERR(sc->clk_bus[ptr]))
577 sc->clk_rates[ptr] = clk_get_rate(sc->clk_bus[ptr]);
579 dev_info(dev, "clock source %d: %s (%ld Hz)\n",
580 ptr, name, sc->clk_rates[ptr]);
584 dev_err(dev, "failed to find any bus clocks\n");
589 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
590 host->ioaddr = devm_ioremap_resource(&pdev->dev, res);
591 if (IS_ERR(host->ioaddr)) {
592 ret = PTR_ERR(host->ioaddr);
596 /* Ensure we have minimal gpio selected CMD/CLK/Detect */
598 pdata->cfg_gpio(pdev, pdata->max_width);
600 host->hw_name = "samsung-hsmmc";
601 host->ops = &sdhci_s3c_ops;
606 /* Setup quirks for the controller */
607 host->quirks |= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC;
608 host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT;
610 host->quirks |= drv_data->sdhci_quirks;
612 #ifndef CONFIG_MMC_SDHCI_S3C_DMA
614 /* we currently see overruns on errors, so disable the SDMA
615 * support as well. */
616 host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
618 #endif /* CONFIG_MMC_SDHCI_S3C_DMA */
620 /* It seems we do not get an DATA transfer complete on non-busy
621 * transfers, not sure if this is a problem with this specific
622 * SDHCI block, or a missing configuration that needs to be set. */
623 host->quirks |= SDHCI_QUIRK_NO_BUSY_IRQ;
625 /* This host supports the Auto CMD12 */
626 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
628 /* Samsung SoCs need BROKEN_ADMA_ZEROLEN_DESC */
629 host->quirks |= SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC;
631 if (pdata->cd_type == S3C_SDHCI_CD_NONE ||
632 pdata->cd_type == S3C_SDHCI_CD_PERMANENT)
633 host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
635 if (pdata->cd_type == S3C_SDHCI_CD_PERMANENT)
636 host->mmc->caps = MMC_CAP_NONREMOVABLE;
638 switch (pdata->max_width) {
640 host->mmc->caps |= MMC_CAP_8_BIT_DATA;
642 host->mmc->caps |= MMC_CAP_4_BIT_DATA;
647 host->mmc->pm_caps |= pdata->pm_caps;
649 host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR |
650 SDHCI_QUIRK_32BIT_DMA_SIZE);
652 /* HSMMC on Samsung SoCs uses SDCLK as timeout clock */
653 host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK;
656 * If controller does not have internal clock divider,
657 * we can use overriding functions instead of default.
659 if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) {
660 sdhci_s3c_ops.set_clock = sdhci_cmu_set_clock;
661 sdhci_s3c_ops.get_min_clock = sdhci_cmu_get_min_clock;
662 sdhci_s3c_ops.get_max_clock = sdhci_cmu_get_max_clock;
665 /* It supports additional host capabilities if needed */
666 if (pdata->host_caps)
667 host->mmc->caps |= pdata->host_caps;
669 if (pdata->host_caps2)
670 host->mmc->caps2 |= pdata->host_caps2;
672 pm_runtime_enable(&pdev->dev);
673 pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
674 pm_runtime_use_autosuspend(&pdev->dev);
675 pm_suspend_ignore_children(&pdev->dev, 1);
677 ret = sdhci_add_host(host);
679 dev_err(dev, "sdhci_add_host() failed\n");
680 pm_runtime_forbid(&pdev->dev);
681 pm_runtime_get_noresume(&pdev->dev);
685 /* The following two methods of card detection might call
686 sdhci_s3c_notify_change() immediately, so they can be called
687 only after sdhci_add_host(). Setup errors are ignored. */
688 if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_init)
689 pdata->ext_cd_init(&sdhci_s3c_notify_change);
690 if (pdata->cd_type == S3C_SDHCI_CD_GPIO &&
691 gpio_is_valid(pdata->ext_cd_gpio))
692 sdhci_s3c_setup_card_detect_gpio(sc);
694 #ifdef CONFIG_PM_RUNTIME
695 if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL)
696 clk_disable_unprepare(sc->clk_io);
702 clk_disable_unprepare(sc->clk_io);
705 sdhci_free_host(host);
710 static int sdhci_s3c_remove(struct platform_device *pdev)
712 struct sdhci_host *host = platform_get_drvdata(pdev);
713 struct sdhci_s3c *sc = sdhci_priv(host);
714 struct s3c_sdhci_platdata *pdata = sc->pdata;
716 if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_cleanup)
717 pdata->ext_cd_cleanup(&sdhci_s3c_notify_change);
720 free_irq(sc->ext_cd_irq, sc);
722 #ifdef CONFIG_PM_RUNTIME
723 if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL)
724 clk_prepare_enable(sc->clk_io);
726 sdhci_remove_host(host, 1);
728 pm_runtime_dont_use_autosuspend(&pdev->dev);
729 pm_runtime_disable(&pdev->dev);
731 clk_disable_unprepare(sc->clk_io);
733 sdhci_free_host(host);
738 #ifdef CONFIG_PM_SLEEP
739 static int sdhci_s3c_suspend(struct device *dev)
741 struct sdhci_host *host = dev_get_drvdata(dev);
743 return sdhci_suspend_host(host);
746 static int sdhci_s3c_resume(struct device *dev)
748 struct sdhci_host *host = dev_get_drvdata(dev);
750 return sdhci_resume_host(host);
754 #ifdef CONFIG_PM_RUNTIME
755 static int sdhci_s3c_runtime_suspend(struct device *dev)
757 struct sdhci_host *host = dev_get_drvdata(dev);
758 struct sdhci_s3c *ourhost = to_s3c(host);
759 struct clk *busclk = ourhost->clk_io;
762 ret = sdhci_runtime_suspend_host(host);
764 if (ourhost->cur_clk >= 0)
765 clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]);
766 clk_disable_unprepare(busclk);
770 static int sdhci_s3c_runtime_resume(struct device *dev)
772 struct sdhci_host *host = dev_get_drvdata(dev);
773 struct sdhci_s3c *ourhost = to_s3c(host);
774 struct clk *busclk = ourhost->clk_io;
777 clk_prepare_enable(busclk);
778 if (ourhost->cur_clk >= 0)
779 clk_prepare_enable(ourhost->clk_bus[ourhost->cur_clk]);
780 ret = sdhci_runtime_resume_host(host);
786 static const struct dev_pm_ops sdhci_s3c_pmops = {
787 SET_SYSTEM_SLEEP_PM_OPS(sdhci_s3c_suspend, sdhci_s3c_resume)
788 SET_RUNTIME_PM_OPS(sdhci_s3c_runtime_suspend, sdhci_s3c_runtime_resume,
792 #define SDHCI_S3C_PMOPS (&sdhci_s3c_pmops)
795 #define SDHCI_S3C_PMOPS NULL
798 #if defined(CONFIG_CPU_EXYNOS4210) || defined(CONFIG_SOC_EXYNOS4212)
799 static struct sdhci_s3c_drv_data exynos4_sdhci_drv_data = {
800 .sdhci_quirks = SDHCI_QUIRK_NONSTANDARD_CLOCK,
802 #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)&exynos4_sdhci_drv_data)
804 #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)NULL)
807 static struct platform_device_id sdhci_s3c_driver_ids[] = {
810 .driver_data = (kernel_ulong_t)NULL,
812 .name = "exynos4-sdhci",
813 .driver_data = EXYNOS4_SDHCI_DRV_DATA,
817 MODULE_DEVICE_TABLE(platform, sdhci_s3c_driver_ids);
820 static const struct of_device_id sdhci_s3c_dt_match[] = {
821 { .compatible = "samsung,s3c6410-sdhci", },
822 { .compatible = "samsung,exynos4210-sdhci",
823 .data = (void *)EXYNOS4_SDHCI_DRV_DATA },
826 MODULE_DEVICE_TABLE(of, sdhci_s3c_dt_match);
829 static struct platform_driver sdhci_s3c_driver = {
830 .probe = sdhci_s3c_probe,
831 .remove = sdhci_s3c_remove,
832 .id_table = sdhci_s3c_driver_ids,
834 .owner = THIS_MODULE,
836 .of_match_table = of_match_ptr(sdhci_s3c_dt_match),
837 .pm = SDHCI_S3C_PMOPS,
841 module_platform_driver(sdhci_s3c_driver);
843 MODULE_DESCRIPTION("Samsung SDHCI (HSMMC) glue");
845 MODULE_LICENSE("GPL v2");
846 MODULE_ALIAS("platform:s3c-sdhci");