1 /* linux/drivers/mmc/host/sdhci-s3c.c
3 * Copyright 2008 Openmoko Inc.
4 * Copyright 2008 Simtec Electronics
5 * Ben Dooks <ben@simtec.co.uk>
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];
63 * struct sdhci_s3c_driver_data - S3C SDHCI platform specific driver data
64 * @sdhci_quirks: sdhci host specific quirks.
66 * Specifies platform specific configuration of sdhci controller.
67 * Note: A structure for driver specific platform data is used for future
68 * expansion of its usage.
70 struct sdhci_s3c_drv_data {
71 unsigned int sdhci_quirks;
74 static inline struct sdhci_s3c *to_s3c(struct sdhci_host *host)
76 return sdhci_priv(host);
80 * get_curclk - convert ctrl2 register to clock source number
81 * @ctrl2: Control2 register value.
83 static u32 get_curclk(u32 ctrl2)
85 ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK;
86 ctrl2 >>= S3C_SDHCI_CTRL2_SELBASECLK_SHIFT;
91 static void sdhci_s3c_check_sclk(struct sdhci_host *host)
93 struct sdhci_s3c *ourhost = to_s3c(host);
94 u32 tmp = readl(host->ioaddr + S3C_SDHCI_CONTROL2);
96 if (get_curclk(tmp) != ourhost->cur_clk) {
97 dev_dbg(&ourhost->pdev->dev, "restored ctrl2 clock setting\n");
99 tmp &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK;
100 tmp |= ourhost->cur_clk << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT;
101 writel(tmp, host->ioaddr + S3C_SDHCI_CONTROL2);
106 * sdhci_s3c_get_max_clk - callback to get maximum clock frequency.
107 * @host: The SDHCI host instance.
109 * Callback to return the maximum clock rate acheivable by the controller.
111 static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host)
113 struct sdhci_s3c *ourhost = to_s3c(host);
115 unsigned int rate, max;
118 /* note, a reset will reset the clock source */
120 sdhci_s3c_check_sclk(host);
122 for (max = 0, clk = 0; clk < MAX_BUS_CLK; clk++) {
123 busclk = ourhost->clk_bus[clk];
127 rate = clk_get_rate(busclk);
136 * sdhci_s3c_consider_clock - consider one the bus clocks for current setting
137 * @ourhost: Our SDHCI instance.
138 * @src: The source clock index.
139 * @wanted: The clock frequency wanted.
141 static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost,
146 struct clk *clksrc = ourhost->clk_bus[src];
153 * If controller uses a non-standard clock division, find the best clock
154 * speed possible with selected clock source and skip the division.
156 if (ourhost->host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) {
157 rate = clk_round_rate(clksrc, wanted);
158 return wanted - rate;
161 rate = clk_get_rate(clksrc);
163 for (div = 1; div < 256; div *= 2) {
164 if ((rate / div) <= wanted)
168 dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n",
169 src, rate, wanted, rate / div);
171 return wanted - (rate / div);
175 * sdhci_s3c_set_clock - callback on clock change
176 * @host: The SDHCI host being changed
177 * @clock: The clock rate being requested.
179 * When the card's clock is going to be changed, look at the new frequency
180 * and find the best clock source to go with it.
182 static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock)
184 struct sdhci_s3c *ourhost = to_s3c(host);
185 unsigned int best = UINT_MAX;
191 /* don't bother if the clock is going off. */
195 for (src = 0; src < MAX_BUS_CLK; src++) {
196 delta = sdhci_s3c_consider_clock(ourhost, src, clock);
203 dev_dbg(&ourhost->pdev->dev,
204 "selected source %d, clock %d, delta %d\n",
205 best_src, clock, best);
207 /* select the new clock source */
208 if (ourhost->cur_clk != best_src) {
209 struct clk *clk = ourhost->clk_bus[best_src];
211 clk_prepare_enable(clk);
212 clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]);
214 /* turn clock off to card before changing clock source */
215 writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
217 ourhost->cur_clk = best_src;
218 host->max_clk = clk_get_rate(clk);
220 ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2);
221 ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK;
222 ctrl |= best_src << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT;
223 writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2);
226 /* reprogram default hardware configuration */
227 writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA,
228 host->ioaddr + S3C64XX_SDHCI_CONTROL4);
230 ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2);
231 ctrl |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |
232 S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |
233 S3C_SDHCI_CTRL2_ENFBCLKRX |
234 S3C_SDHCI_CTRL2_DFCNT_NONE |
235 S3C_SDHCI_CTRL2_ENCLKOUTHOLD);
236 writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2);
238 /* reconfigure the controller for new clock rate */
239 ctrl = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0);
240 if (clock < 25 * 1000000)
241 ctrl |= (S3C_SDHCI_CTRL3_FCSEL3 | S3C_SDHCI_CTRL3_FCSEL2);
242 writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL3);
246 * sdhci_s3c_get_min_clock - callback to get minimal supported clock value
247 * @host: The SDHCI host being queried
249 * To init mmc host properly a minimal clock value is needed. For high system
250 * bus clock's values the standard formula gives values out of allowed range.
251 * The clock still can be set to lower values, if clock source other then
252 * system bus is selected.
254 static unsigned int sdhci_s3c_get_min_clock(struct sdhci_host *host)
256 struct sdhci_s3c *ourhost = to_s3c(host);
257 unsigned int delta, min = UINT_MAX;
260 for (src = 0; src < MAX_BUS_CLK; src++) {
261 delta = sdhci_s3c_consider_clock(ourhost, src, 0);
262 if (delta == UINT_MAX)
264 /* delta is a negative value in this case */
271 /* sdhci_cmu_get_max_clk - callback to get maximum clock frequency.*/
272 static unsigned int sdhci_cmu_get_max_clock(struct sdhci_host *host)
274 struct sdhci_s3c *ourhost = to_s3c(host);
276 return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], UINT_MAX);
279 /* sdhci_cmu_get_min_clock - callback to get minimal supported clock value. */
280 static unsigned int sdhci_cmu_get_min_clock(struct sdhci_host *host)
282 struct sdhci_s3c *ourhost = to_s3c(host);
285 * initial clock can be in the frequency range of
286 * 100KHz-400KHz, so we set it as max value.
288 return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], 400000);
291 /* sdhci_cmu_set_clock - callback on clock change.*/
292 static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock)
294 struct sdhci_s3c *ourhost = to_s3c(host);
295 struct device *dev = &ourhost->pdev->dev;
296 unsigned long timeout;
299 /* If the clock is going off, set to 0 at clock control register */
301 sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
306 sdhci_s3c_set_clock(host, clock);
308 clk_set_rate(ourhost->clk_bus[ourhost->cur_clk], clock);
312 clk = SDHCI_CLOCK_INT_EN;
313 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
317 while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
318 & SDHCI_CLOCK_INT_STABLE)) {
320 dev_err(dev, "%s: Internal clock never stabilised.\n",
321 mmc_hostname(host->mmc));
328 clk |= SDHCI_CLOCK_CARD_EN;
329 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
333 * sdhci_s3c_platform_bus_width - support 8bit buswidth
334 * @host: The SDHCI host being queried
335 * @width: MMC_BUS_WIDTH_ macro for the bus width being requested
337 * We have 8-bit width support but is not a v3 controller.
338 * So we add platform_bus_width() and support 8bit width.
340 static int sdhci_s3c_platform_bus_width(struct sdhci_host *host, int width)
344 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
347 case MMC_BUS_WIDTH_8:
348 ctrl |= SDHCI_CTRL_8BITBUS;
349 ctrl &= ~SDHCI_CTRL_4BITBUS;
351 case MMC_BUS_WIDTH_4:
352 ctrl |= SDHCI_CTRL_4BITBUS;
353 ctrl &= ~SDHCI_CTRL_8BITBUS;
356 ctrl &= ~SDHCI_CTRL_4BITBUS;
357 ctrl &= ~SDHCI_CTRL_8BITBUS;
361 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
366 static struct sdhci_ops sdhci_s3c_ops = {
367 .get_max_clock = sdhci_s3c_get_max_clk,
368 .set_clock = sdhci_s3c_set_clock,
369 .get_min_clock = sdhci_s3c_get_min_clock,
370 .platform_bus_width = sdhci_s3c_platform_bus_width,
373 static void sdhci_s3c_notify_change(struct platform_device *dev, int state)
375 struct sdhci_host *host = platform_get_drvdata(dev);
376 #ifdef CONFIG_PM_RUNTIME
377 struct sdhci_s3c *sc = sdhci_priv(host);
382 spin_lock_irqsave(&host->lock, flags);
384 dev_dbg(&dev->dev, "card inserted.\n");
385 #ifdef CONFIG_PM_RUNTIME
386 clk_prepare_enable(sc->clk_io);
388 host->flags &= ~SDHCI_DEVICE_DEAD;
389 host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
391 dev_dbg(&dev->dev, "card removed.\n");
392 host->flags |= SDHCI_DEVICE_DEAD;
393 host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
394 #ifdef CONFIG_PM_RUNTIME
395 clk_disable_unprepare(sc->clk_io);
398 tasklet_schedule(&host->card_tasklet);
399 spin_unlock_irqrestore(&host->lock, flags);
403 static irqreturn_t sdhci_s3c_gpio_card_detect_thread(int irq, void *dev_id)
405 struct sdhci_s3c *sc = dev_id;
406 int status = gpio_get_value(sc->ext_cd_gpio);
407 if (sc->pdata->ext_cd_gpio_invert)
409 sdhci_s3c_notify_change(sc->pdev, status);
413 static void sdhci_s3c_setup_card_detect_gpio(struct sdhci_s3c *sc)
415 struct s3c_sdhci_platdata *pdata = sc->pdata;
416 struct device *dev = &sc->pdev->dev;
418 if (devm_gpio_request(dev, pdata->ext_cd_gpio, "SDHCI EXT CD") == 0) {
419 sc->ext_cd_gpio = pdata->ext_cd_gpio;
420 sc->ext_cd_irq = gpio_to_irq(pdata->ext_cd_gpio);
421 if (sc->ext_cd_irq &&
422 request_threaded_irq(sc->ext_cd_irq, NULL,
423 sdhci_s3c_gpio_card_detect_thread,
424 IRQF_TRIGGER_RISING |
425 IRQF_TRIGGER_FALLING |
427 dev_name(dev), sc) == 0) {
428 int status = gpio_get_value(sc->ext_cd_gpio);
429 if (pdata->ext_cd_gpio_invert)
431 sdhci_s3c_notify_change(sc->pdev, status);
433 dev_warn(dev, "cannot request irq for card detect\n");
437 dev_err(dev, "cannot request gpio for card detect\n");
442 static int sdhci_s3c_parse_dt(struct device *dev,
443 struct sdhci_host *host, struct s3c_sdhci_platdata *pdata)
445 struct device_node *node = dev->of_node;
446 struct sdhci_s3c *ourhost = to_s3c(host);
450 /* if the bus-width property is not specified, assume width as 1 */
451 if (of_property_read_u32(node, "bus-width", &max_width))
453 pdata->max_width = max_width;
455 /* get the card detection method */
456 if (of_get_property(node, "broken-cd", NULL)) {
457 pdata->cd_type = S3C_SDHCI_CD_NONE;
461 if (of_get_property(node, "non-removable", NULL)) {
462 pdata->cd_type = S3C_SDHCI_CD_PERMANENT;
466 gpio = of_get_named_gpio(node, "cd-gpios", 0);
467 if (gpio_is_valid(gpio)) {
468 pdata->cd_type = S3C_SDHCI_CD_GPIO;
469 pdata->ext_cd_gpio = gpio;
470 ourhost->ext_cd_gpio = -1;
471 if (of_get_property(node, "cd-inverted", NULL))
472 pdata->ext_cd_gpio_invert = 1;
474 } else if (gpio != -ENOENT) {
475 dev_err(dev, "invalid card detect gpio specified\n");
479 /* assuming internal card detect that will be configured by pinctrl */
480 pdata->cd_type = S3C_SDHCI_CD_INTERNAL;
484 static int sdhci_s3c_parse_dt(struct device *dev,
485 struct sdhci_host *host, struct s3c_sdhci_platdata *pdata)
491 static const struct of_device_id sdhci_s3c_dt_match[];
493 static inline struct sdhci_s3c_drv_data *sdhci_s3c_get_driver_data(
494 struct platform_device *pdev)
497 if (pdev->dev.of_node) {
498 const struct of_device_id *match;
499 match = of_match_node(sdhci_s3c_dt_match, pdev->dev.of_node);
500 return (struct sdhci_s3c_drv_data *)match->data;
503 return (struct sdhci_s3c_drv_data *)
504 platform_get_device_id(pdev)->driver_data;
507 static int sdhci_s3c_probe(struct platform_device *pdev)
509 struct s3c_sdhci_platdata *pdata;
510 struct sdhci_s3c_drv_data *drv_data;
511 struct device *dev = &pdev->dev;
512 struct sdhci_host *host;
513 struct sdhci_s3c *sc;
514 struct resource *res;
515 int ret, irq, ptr, clks;
517 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
518 dev_err(dev, "no device data specified\n");
522 irq = platform_get_irq(pdev, 0);
524 dev_err(dev, "no irq specified\n");
528 host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c));
530 dev_err(dev, "sdhci_alloc_host() failed\n");
531 return PTR_ERR(host);
533 sc = sdhci_priv(host);
535 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
538 goto err_pdata_io_clk;
541 if (pdev->dev.of_node) {
542 ret = sdhci_s3c_parse_dt(&pdev->dev, host, pdata);
544 goto err_pdata_io_clk;
546 memcpy(pdata, pdev->dev.platform_data, sizeof(*pdata));
547 sc->ext_cd_gpio = -1; /* invalid gpio number */
550 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++) {
572 snprintf(name, 14, "mmc_busclk.%d", ptr);
573 clk = devm_clk_get(dev, name);
578 sc->clk_bus[ptr] = clk;
581 * save current clock index to know which clock bus
582 * is used later in overriding functions.
586 dev_info(dev, "clock source %d: %s (%ld Hz)\n",
587 ptr, name, clk_get_rate(clk));
591 dev_err(dev, "failed to find any bus clocks\n");
596 #ifndef CONFIG_PM_RUNTIME
597 clk_prepare_enable(sc->clk_bus[sc->cur_clk]);
600 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
601 host->ioaddr = devm_ioremap_resource(&pdev->dev, res);
602 if (IS_ERR(host->ioaddr)) {
603 ret = PTR_ERR(host->ioaddr);
607 /* Ensure we have minimal gpio selected CMD/CLK/Detect */
609 pdata->cfg_gpio(pdev, pdata->max_width);
611 host->hw_name = "samsung-hsmmc";
612 host->ops = &sdhci_s3c_ops;
617 /* Setup quirks for the controller */
618 host->quirks |= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC;
619 host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT;
621 host->quirks |= drv_data->sdhci_quirks;
623 #ifndef CONFIG_MMC_SDHCI_S3C_DMA
625 /* we currently see overruns on errors, so disable the SDMA
626 * support as well. */
627 host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
629 #endif /* CONFIG_MMC_SDHCI_S3C_DMA */
631 /* It seems we do not get an DATA transfer complete on non-busy
632 * transfers, not sure if this is a problem with this specific
633 * SDHCI block, or a missing configuration that needs to be set. */
634 host->quirks |= SDHCI_QUIRK_NO_BUSY_IRQ;
636 /* This host supports the Auto CMD12 */
637 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
639 /* Samsung SoCs need BROKEN_ADMA_ZEROLEN_DESC */
640 host->quirks |= SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC;
642 if (pdata->cd_type == S3C_SDHCI_CD_NONE ||
643 pdata->cd_type == S3C_SDHCI_CD_PERMANENT)
644 host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
646 if (pdata->cd_type == S3C_SDHCI_CD_PERMANENT)
647 host->mmc->caps = MMC_CAP_NONREMOVABLE;
649 switch (pdata->max_width) {
651 host->mmc->caps |= MMC_CAP_8_BIT_DATA;
653 host->mmc->caps |= MMC_CAP_4_BIT_DATA;
658 host->mmc->pm_caps |= pdata->pm_caps;
660 host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR |
661 SDHCI_QUIRK_32BIT_DMA_SIZE);
663 /* HSMMC on Samsung SoCs uses SDCLK as timeout clock */
664 host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK;
667 * If controller does not have internal clock divider,
668 * we can use overriding functions instead of default.
670 if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) {
671 sdhci_s3c_ops.set_clock = sdhci_cmu_set_clock;
672 sdhci_s3c_ops.get_min_clock = sdhci_cmu_get_min_clock;
673 sdhci_s3c_ops.get_max_clock = sdhci_cmu_get_max_clock;
676 /* It supports additional host capabilities if needed */
677 if (pdata->host_caps)
678 host->mmc->caps |= pdata->host_caps;
680 if (pdata->host_caps2)
681 host->mmc->caps2 |= pdata->host_caps2;
683 pm_runtime_enable(&pdev->dev);
684 pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
685 pm_runtime_use_autosuspend(&pdev->dev);
686 pm_suspend_ignore_children(&pdev->dev, 1);
688 ret = sdhci_add_host(host);
690 dev_err(dev, "sdhci_add_host() failed\n");
691 pm_runtime_forbid(&pdev->dev);
692 pm_runtime_get_noresume(&pdev->dev);
696 /* The following two methods of card detection might call
697 sdhci_s3c_notify_change() immediately, so they can be called
698 only after sdhci_add_host(). Setup errors are ignored. */
699 if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_init)
700 pdata->ext_cd_init(&sdhci_s3c_notify_change);
701 if (pdata->cd_type == S3C_SDHCI_CD_GPIO &&
702 gpio_is_valid(pdata->ext_cd_gpio))
703 sdhci_s3c_setup_card_detect_gpio(sc);
705 #ifdef CONFIG_PM_RUNTIME
706 if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL)
707 clk_disable_unprepare(sc->clk_io);
712 #ifndef CONFIG_PM_RUNTIME
713 clk_disable_unprepare(sc->clk_bus[sc->cur_clk]);
717 clk_disable_unprepare(sc->clk_io);
720 sdhci_free_host(host);
725 static int sdhci_s3c_remove(struct platform_device *pdev)
727 struct sdhci_host *host = platform_get_drvdata(pdev);
728 struct sdhci_s3c *sc = sdhci_priv(host);
729 struct s3c_sdhci_platdata *pdata = sc->pdata;
731 if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_cleanup)
732 pdata->ext_cd_cleanup(&sdhci_s3c_notify_change);
735 free_irq(sc->ext_cd_irq, sc);
737 #ifdef CONFIG_PM_RUNTIME
738 if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL)
739 clk_prepare_enable(sc->clk_io);
741 sdhci_remove_host(host, 1);
743 pm_runtime_dont_use_autosuspend(&pdev->dev);
744 pm_runtime_disable(&pdev->dev);
746 #ifndef CONFIG_PM_RUNTIME
747 clk_disable_unprepare(sc->clk_bus[sc->cur_clk]);
749 clk_disable_unprepare(sc->clk_io);
751 sdhci_free_host(host);
756 #ifdef CONFIG_PM_SLEEP
757 static int sdhci_s3c_suspend(struct device *dev)
759 struct sdhci_host *host = dev_get_drvdata(dev);
761 return sdhci_suspend_host(host);
764 static int sdhci_s3c_resume(struct device *dev)
766 struct sdhci_host *host = dev_get_drvdata(dev);
768 return sdhci_resume_host(host);
772 #ifdef CONFIG_PM_RUNTIME
773 static int sdhci_s3c_runtime_suspend(struct device *dev)
775 struct sdhci_host *host = dev_get_drvdata(dev);
776 struct sdhci_s3c *ourhost = to_s3c(host);
777 struct clk *busclk = ourhost->clk_io;
780 ret = sdhci_runtime_suspend_host(host);
782 clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]);
783 clk_disable_unprepare(busclk);
787 static int sdhci_s3c_runtime_resume(struct device *dev)
789 struct sdhci_host *host = dev_get_drvdata(dev);
790 struct sdhci_s3c *ourhost = to_s3c(host);
791 struct clk *busclk = ourhost->clk_io;
794 clk_prepare_enable(busclk);
795 clk_prepare_enable(ourhost->clk_bus[ourhost->cur_clk]);
796 ret = sdhci_runtime_resume_host(host);
802 static const struct dev_pm_ops sdhci_s3c_pmops = {
803 SET_SYSTEM_SLEEP_PM_OPS(sdhci_s3c_suspend, sdhci_s3c_resume)
804 SET_RUNTIME_PM_OPS(sdhci_s3c_runtime_suspend, sdhci_s3c_runtime_resume,
808 #define SDHCI_S3C_PMOPS (&sdhci_s3c_pmops)
811 #define SDHCI_S3C_PMOPS NULL
814 #if defined(CONFIG_CPU_EXYNOS4210) || defined(CONFIG_SOC_EXYNOS4212)
815 static struct sdhci_s3c_drv_data exynos4_sdhci_drv_data = {
816 .sdhci_quirks = SDHCI_QUIRK_NONSTANDARD_CLOCK,
818 #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)&exynos4_sdhci_drv_data)
820 #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)NULL)
823 static struct platform_device_id sdhci_s3c_driver_ids[] = {
826 .driver_data = (kernel_ulong_t)NULL,
828 .name = "exynos4-sdhci",
829 .driver_data = EXYNOS4_SDHCI_DRV_DATA,
833 MODULE_DEVICE_TABLE(platform, sdhci_s3c_driver_ids);
836 static const struct of_device_id sdhci_s3c_dt_match[] = {
837 { .compatible = "samsung,s3c6410-sdhci", },
838 { .compatible = "samsung,exynos4210-sdhci",
839 .data = (void *)EXYNOS4_SDHCI_DRV_DATA },
842 MODULE_DEVICE_TABLE(of, sdhci_s3c_dt_match);
845 static struct platform_driver sdhci_s3c_driver = {
846 .probe = sdhci_s3c_probe,
847 .remove = sdhci_s3c_remove,
848 .id_table = sdhci_s3c_driver_ids,
850 .owner = THIS_MODULE,
852 .of_match_table = of_match_ptr(sdhci_s3c_dt_match),
853 .pm = SDHCI_S3C_PMOPS,
857 module_platform_driver(sdhci_s3c_driver);
859 MODULE_DESCRIPTION("Samsung SDHCI (HSMMC) glue");
860 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
861 MODULE_LICENSE("GPL v2");
862 MODULE_ALIAS("platform:s3c-sdhci");