#include <linux/mmc/core.h>
#include <linux/io.h>
#include <linux/semaphore.h>
+#include <linux/gpio.h>
+#include <linux/regulator/consumer.h>
#include <plat/dma.h>
#include <mach/hardware.h>
#include <plat/board.h>
struct clk *fclk;
struct clk *iclk;
struct clk *dbclk;
+ /*
+ * vcc == configured supply
+ * vcc_aux == optional
+ * - MMC1, supply for DAT4..DAT7
+ * - MMC2/MMC2, external level shifter voltage supply, for
+ * chip (SDIO, eMMC, etc) or transceiver (MMC2 only)
+ */
+ struct regulator *vcc;
+ struct regulator *vcc_aux;
struct semaphore sem;
struct work_struct mmc_carddetect_work;
void __iomem *base;
int vdd;
int protect_card;
int reqs_blocked;
+ int use_reg;
struct omap_mmc_platform_data *pdata;
};
+static int omap_hsmmc_card_detect(struct device *dev, int slot)
+{
+ struct omap_mmc_platform_data *mmc = dev->platform_data;
+
+ /* NOTE: assumes card detect signal is active-low */
+ return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
+}
+
+static int omap_hsmmc_get_wp(struct device *dev, int slot)
+{
+ struct omap_mmc_platform_data *mmc = dev->platform_data;
+
+ /* NOTE: assumes write protect signal is active-high */
+ return gpio_get_value_cansleep(mmc->slots[0].gpio_wp);
+}
+
+static int omap_hsmmc_get_cover_state(struct device *dev, int slot)
+{
+ struct omap_mmc_platform_data *mmc = dev->platform_data;
+
+ /* NOTE: assumes card detect signal is active-low */
+ return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
+}
+
+#ifdef CONFIG_PM
+
+static int omap_hsmmc_suspend_cdirq(struct device *dev, int slot)
+{
+ struct omap_mmc_platform_data *mmc = dev->platform_data;
+
+ disable_irq(mmc->slots[0].card_detect_irq);
+ return 0;
+}
+
+static int omap_hsmmc_resume_cdirq(struct device *dev, int slot)
+{
+ struct omap_mmc_platform_data *mmc = dev->platform_data;
+
+ enable_irq(mmc->slots[0].card_detect_irq);
+ return 0;
+}
+
+#else
+
+#define omap_hsmmc_suspend_cdirq NULL
+#define omap_hsmmc_resume_cdirq NULL
+
+#endif
+
+static int omap_hsmmc_1_set_power(struct device *dev, int slot, int power_on,
+ int vdd)
+{
+ struct omap_hsmmc_host *host =
+ platform_get_drvdata(to_platform_device(dev));
+ int ret;
+
+ if (mmc_slot(host).before_set_reg)
+ mmc_slot(host).before_set_reg(dev, slot, power_on, vdd);
+
+ if (power_on)
+ ret = mmc_regulator_set_ocr(host->vcc, vdd);
+ else
+ ret = mmc_regulator_set_ocr(host->vcc, 0);
+
+ if (mmc_slot(host).after_set_reg)
+ mmc_slot(host).after_set_reg(dev, slot, power_on, vdd);
+
+ return ret;
+}
+
+static int omap_hsmmc_23_set_power(struct device *dev, int slot, int power_on,
+ int vdd)
+{
+ struct omap_hsmmc_host *host =
+ platform_get_drvdata(to_platform_device(dev));
+ int ret = 0;
+
+ /*
+ * If we don't see a Vcc regulator, assume it's a fixed
+ * voltage always-on regulator.
+ */
+ if (!host->vcc)
+ return 0;
+
+ if (mmc_slot(host).before_set_reg)
+ mmc_slot(host).before_set_reg(dev, slot, power_on, vdd);
+
+ /*
+ * Assume Vcc regulator is used only to power the card ... OMAP
+ * VDDS is used to power the pins, optionally with a transceiver to
+ * support cards using voltages other than VDDS (1.8V nominal). When a
+ * transceiver is used, DAT3..7 are muxed as transceiver control pins.
+ *
+ * In some cases this regulator won't support enable/disable;
+ * e.g. it's a fixed rail for a WLAN chip.
+ *
+ * In other cases vcc_aux switches interface power. Example, for
+ * eMMC cards it represents VccQ. Sometimes transceivers or SDIO
+ * chips/cards need an interface voltage rail too.
+ */
+ if (power_on) {
+ ret = mmc_regulator_set_ocr(host->vcc, vdd);
+ /* Enable interface voltage rail, if needed */
+ if (ret == 0 && host->vcc_aux) {
+ ret = regulator_enable(host->vcc_aux);
+ if (ret < 0)
+ ret = mmc_regulator_set_ocr(host->vcc, 0);
+ }
+ } else {
+ if (host->vcc_aux) {
+ ret = regulator_is_enabled(host->vcc_aux);
+ if (ret > 0)
+ ret = regulator_disable(host->vcc_aux);
+ }
+ if (ret == 0)
+ ret = mmc_regulator_set_ocr(host->vcc, 0);
+ }
+
+ if (mmc_slot(host).after_set_reg)
+ mmc_slot(host).after_set_reg(dev, slot, power_on, vdd);
+
+ return ret;
+}
+
+static int omap_hsmmc_1_set_sleep(struct device *dev, int slot, int sleep,
+ int vdd, int cardsleep)
+{
+ struct omap_hsmmc_host *host =
+ platform_get_drvdata(to_platform_device(dev));
+ int mode = sleep ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL;
+
+ return regulator_set_mode(host->vcc, mode);
+}
+
+static int omap_hsmmc_23_set_sleep(struct device *dev, int slot, int sleep,
+ int vdd, int cardsleep)
+{
+ struct omap_hsmmc_host *host =
+ platform_get_drvdata(to_platform_device(dev));
+ int err, mode;
+
+ /*
+ * If we don't see a Vcc regulator, assume it's a fixed
+ * voltage always-on regulator.
+ */
+ if (!host->vcc)
+ return 0;
+
+ mode = sleep ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL;
+
+ if (!host->vcc_aux)
+ return regulator_set_mode(host->vcc, mode);
+
+ if (cardsleep) {
+ /* VCC can be turned off if card is asleep */
+ if (sleep)
+ err = mmc_regulator_set_ocr(host->vcc, 0);
+ else
+ err = mmc_regulator_set_ocr(host->vcc, vdd);
+ } else
+ err = regulator_set_mode(host->vcc, mode);
+ if (err)
+ return err;
+ return regulator_set_mode(host->vcc_aux, mode);
+}
+
+static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata)
+{
+ int ret;
+
+ if (gpio_is_valid(pdata->slots[0].switch_pin)) {
+ pdata->suspend = omap_hsmmc_suspend_cdirq;
+ pdata->resume = omap_hsmmc_resume_cdirq;
+ if (pdata->slots[0].cover)
+ pdata->slots[0].get_cover_state =
+ omap_hsmmc_get_cover_state;
+ else
+ pdata->slots[0].card_detect = omap_hsmmc_card_detect;
+ pdata->slots[0].card_detect_irq =
+ gpio_to_irq(pdata->slots[0].switch_pin);
+ ret = gpio_request(pdata->slots[0].switch_pin, "mmc_cd");
+ if (ret)
+ return ret;
+ ret = gpio_direction_input(pdata->slots[0].switch_pin);
+ if (ret)
+ goto err_free_sp;
+ } else
+ pdata->slots[0].switch_pin = -EINVAL;
+
+ if (gpio_is_valid(pdata->slots[0].gpio_wp)) {
+ pdata->slots[0].get_ro = omap_hsmmc_get_wp;
+ ret = gpio_request(pdata->slots[0].gpio_wp, "mmc_wp");
+ if (ret)
+ goto err_free_cd;
+ ret = gpio_direction_input(pdata->slots[0].gpio_wp);
+ if (ret)
+ goto err_free_wp;
+ } else
+ pdata->slots[0].gpio_wp = -EINVAL;
+
+ return 0;
+
+err_free_wp:
+ gpio_free(pdata->slots[0].gpio_wp);
+err_free_cd:
+ if (gpio_is_valid(pdata->slots[0].switch_pin))
+err_free_sp:
+ gpio_free(pdata->slots[0].switch_pin);
+ return ret;
+}
+
+static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata)
+{
+ if (gpio_is_valid(pdata->slots[0].gpio_wp))
+ gpio_free(pdata->slots[0].gpio_wp);
+ if (gpio_is_valid(pdata->slots[0].switch_pin))
+ gpio_free(pdata->slots[0].switch_pin);
+}
+
+static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
+{
+ struct regulator *reg;
+ int ret = 0;
+
+ switch (host->id) {
+ case OMAP_MMC1_DEVID:
+ /* On-chip level shifting via PBIAS0/PBIAS1 */
+ mmc_slot(host).set_power = omap_hsmmc_1_set_power;
+ mmc_slot(host).set_sleep = omap_hsmmc_1_set_sleep;
+ break;
+ case OMAP_MMC2_DEVID:
+ case OMAP_MMC3_DEVID:
+ /* Off-chip level shifting, or none */
+ mmc_slot(host).set_power = omap_hsmmc_23_set_power;
+ mmc_slot(host).set_sleep = omap_hsmmc_23_set_sleep;
+ break;
+ default:
+ pr_err("MMC%d configuration not supported!\n", host->id);
+ return -EINVAL;
+ }
+
+ reg = regulator_get(host->dev, "vmmc");
+ if (IS_ERR(reg)) {
+ dev_dbg(host->dev, "vmmc regulator missing\n");
+ /*
+ * HACK: until fixed.c regulator is usable,
+ * we don't require a main regulator
+ * for MMC2 or MMC3
+ */
+ if (host->id == OMAP_MMC1_DEVID) {
+ ret = PTR_ERR(reg);
+ goto err;
+ }
+ } else {
+ host->vcc = reg;
+ mmc_slot(host).ocr_mask = mmc_regulator_get_ocrmask(reg);
+
+ /* Allow an aux regulator */
+ reg = regulator_get(host->dev, "vmmc_aux");
+ host->vcc_aux = IS_ERR(reg) ? NULL : reg;
+
+ /*
+ * UGLY HACK: workaround regulator framework bugs.
+ * When the bootloader leaves a supply active, it's
+ * initialized with zero usecount ... and we can't
+ * disable it without first enabling it. Until the
+ * framework is fixed, we need a workaround like this
+ * (which is safe for MMC, but not in general).
+ */
+ if (regulator_is_enabled(host->vcc) > 0) {
+ regulator_enable(host->vcc);
+ regulator_disable(host->vcc);
+ }
+ if (host->vcc_aux) {
+ if (regulator_is_enabled(reg) > 0) {
+ regulator_enable(reg);
+ regulator_disable(reg);
+ }
+ }
+ }
+
+ return 0;
+
+err:
+ mmc_slot(host).set_power = NULL;
+ mmc_slot(host).set_sleep = NULL;
+ return ret;
+}
+
+static void omap_hsmmc_reg_put(struct omap_hsmmc_host *host)
+{
+ regulator_put(host->vcc);
+ regulator_put(host->vcc_aux);
+ mmc_slot(host).set_power = NULL;
+ mmc_slot(host).set_sleep = NULL;
+}
+
/*
* Stop clock to the card
*/
sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch");
if (slot->card_detect)
- carddetect = slot->card_detect(slot->card_detect_irq);
+ carddetect = slot->card_detect(host->dev, host->slot_id);
else {
omap_hsmmc_protect_card(host);
carddetect = -ENOSYS;
if (!mmc_slot(host).card_detect)
return -ENOSYS;
- return mmc_slot(host).card_detect(mmc_slot(host).card_detect_irq);
+ return mmc_slot(host).card_detect(host->dev, host->slot_id);
}
static int omap_hsmmc_get_ro(struct mmc_host *mmc)
if (host->power_mode == MMC_POWER_OFF)
return 0;
- return msecs_to_jiffies(OMAP_MMC_SLEEP_TIMEOUT);
+ return OMAP_MMC_SLEEP_TIMEOUT;
}
/* Handler for [DISABLED -> REGSLEEP / CARDSLEEP] transition */
dev_dbg(mmc_dev(host->mmc), "DISABLED -> %s\n",
host->dpm_state == CARDSLEEP ? "CARDSLEEP" : "REGSLEEP");
+ if (mmc_slot(host).no_off)
+ return 0;
+
if ((host->mmc->caps & MMC_CAP_NONREMOVABLE) ||
mmc_slot(host).card_detect ||
(mmc_slot(host).get_cover_state &&
mmc_slot(host).get_cover_state(host->dev, host->slot_id)))
- return msecs_to_jiffies(OMAP_MMC_OFF_TIMEOUT);
+ return OMAP_MMC_OFF_TIMEOUT;
return 0;
}
if (!mmc_try_claim_host(host->mmc))
return 0;
+ if (mmc_slot(host).no_off)
+ return 0;
+
if (!((host->mmc->caps & MMC_CAP_NONREMOVABLE) ||
mmc_slot(host).card_detect ||
(mmc_slot(host).get_cover_state &&
struct mmc_host *mmc;
struct omap_hsmmc_host *host = NULL;
struct resource *res;
- int ret = 0, irq;
+ int ret, irq;
if (pdata == NULL) {
dev_err(&pdev->dev, "Platform Data is missing\n");
if (res == NULL)
return -EBUSY;
+ ret = omap_hsmmc_gpio_init(pdata);
+ if (ret)
+ goto err;
+
mmc = mmc_alloc_host(sizeof(struct omap_hsmmc_host), &pdev->dev);
if (!mmc) {
ret = -ENOMEM;
- goto err;
+ goto err_alloc;
}
host = mmc_priv(mmc);
goto err_irq;
}
- /* initialize power supplies, gpios, etc */
if (pdata->init != NULL) {
if (pdata->init(&pdev->dev) != 0) {
dev_dbg(mmc_dev(host->mmc),
goto err_irq_cd_init;
}
}
+
+ if (!mmc_slot(host).set_power) {
+ ret = omap_hsmmc_reg_get(host);
+ if (ret)
+ goto err_reg;
+ host->use_reg = 1;
+ }
+
mmc->ocr_avail = mmc_slot(host).ocr_mask;
/* Request IRQ for card detect */
ret = device_create_file(&mmc->class_dev,
&dev_attr_cover_switch);
if (ret < 0)
- goto err_cover_switch;
+ goto err_slot_name;
}
omap_hsmmc_debugfs(mmc);
return 0;
-err_cover_switch:
- device_remove_file(&mmc->class_dev, &dev_attr_cover_switch);
err_slot_name:
mmc_remove_host(mmc);
-err_irq_cd:
free_irq(mmc_slot(host).card_detect_irq, host);
+err_irq_cd:
+ if (host->use_reg)
+ omap_hsmmc_reg_put(host);
+err_reg:
+ if (host->pdata->cleanup)
+ host->pdata->cleanup(&pdev->dev);
err_irq_cd_init:
free_irq(host->irq, host);
err_irq:
clk_disable(host->dbclk);
clk_put(host->dbclk);
}
-
err1:
iounmap(host->base);
+ platform_set_drvdata(pdev, NULL);
+ mmc_free_host(mmc);
+err_alloc:
+ omap_hsmmc_gpio_free(pdata);
err:
- dev_dbg(mmc_dev(host->mmc), "Probe Failed\n");
release_mem_region(res->start, res->end - res->start + 1);
- if (host)
- mmc_free_host(mmc);
return ret;
}
if (host) {
mmc_host_enable(host->mmc);
mmc_remove_host(host->mmc);
+ if (host->use_reg)
+ omap_hsmmc_reg_put(host);
if (host->pdata->cleanup)
host->pdata->cleanup(&pdev->dev);
free_irq(host->irq, host);
mmc_free_host(host->mmc);
iounmap(host->base);
+ omap_hsmmc_gpio_free(pdev->dev.platform_data);
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
git.openpandora.org / pandora-kernel.git / blobdiff