* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/string.h>
#include <linux/delay.h>
-#include <linux/gpio.h>
-#include <linux/mmc/host.h>
-#include <linux/regulator/consumer.h>
-
#include <mach/hardware.h>
#include <plat/control.h>
#include <plat/mmc.h>
-#include <plat/board.h>
#include "mmc-twl4030.h"
-
-#if defined(CONFIG_REGULATOR) && \
- (defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE))
+#if defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
static u16 control_pbias_offset;
static u16 control_devconf1_offset;
#define HSMMC_NAME_LEN 9
static struct twl_mmc_controller {
- struct omap_mmc_platform_data *mmc;
- /* Vcc == configured supply
- * Vcc_alt == 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;
char name[HSMMC_NAME_LEN + 1];
} hsmmc[OMAP34XX_NR_MMC];
-static int twl_mmc_card_detect(int irq)
-{
- unsigned i;
-
- for (i = 0; i < ARRAY_SIZE(hsmmc); i++) {
- struct omap_mmc_platform_data *mmc;
-
- mmc = hsmmc[i].mmc;
- if (!mmc)
- continue;
- if (irq != mmc->slots[0].card_detect_irq)
- continue;
-
- /* NOTE: assumes card detect signal is active-low */
- return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
- }
- return -ENOSYS;
-}
-
-static int twl_mmc_get_ro(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 twl_mmc_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);
-}
-
-/*
- * MMC Slot Initialization.
- */
-static int twl_mmc_late_init(struct device *dev)
-{
- struct omap_mmc_platform_data *mmc = dev->platform_data;
- int ret = 0;
- int i;
-
- /* MMC/SD/SDIO doesn't require a card detect switch */
- if (gpio_is_valid(mmc->slots[0].switch_pin)) {
- ret = gpio_request(mmc->slots[0].switch_pin, "mmc_cd");
- if (ret)
- goto done;
- ret = gpio_direction_input(mmc->slots[0].switch_pin);
- if (ret)
- goto err;
- }
-
- /* require at least main regulator */
- for (i = 0; i < ARRAY_SIZE(hsmmc); i++) {
- if (hsmmc[i].name == mmc->slots[0].name) {
- struct regulator *reg;
-
- hsmmc[i].mmc = mmc;
-
- reg = regulator_get(dev, "vmmc");
- if (IS_ERR(reg)) {
- dev_dbg(dev, "vmmc regulator missing\n");
- /* HACK: until fixed.c regulator is usable,
- * we don't require a main regulator
- * for MMC2 or MMC3
- */
- if (i != 0)
- break;
- ret = PTR_ERR(reg);
- hsmmc[i].vcc = NULL;
- goto err;
- }
- hsmmc[i].vcc = reg;
- mmc->slots[0].ocr_mask = mmc_regulator_get_ocrmask(reg);
-
- /* allow an aux regulator */
- reg = regulator_get(dev, "vmmc_aux");
- hsmmc[i].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(hsmmc[i].vcc) > 0) {
- regulator_enable(hsmmc[i].vcc);
- regulator_disable(hsmmc[i].vcc);
- }
- if (hsmmc[i].vcc_aux) {
- if (regulator_is_enabled(reg) > 0) {
- regulator_enable(reg);
- regulator_disable(reg);
- }
- }
-
- break;
- }
- }
-
- return 0;
-
-err:
- gpio_free(mmc->slots[0].switch_pin);
-done:
- mmc->slots[0].card_detect_irq = 0;
- mmc->slots[0].card_detect = NULL;
-
- dev_err(dev, "err %d configuring card detect\n", ret);
- return ret;
-}
-
-static void twl_mmc_cleanup(struct device *dev)
-{
- struct omap_mmc_platform_data *mmc = dev->platform_data;
- int i;
-
- gpio_free(mmc->slots[0].switch_pin);
- for(i = 0; i < ARRAY_SIZE(hsmmc); i++) {
- regulator_put(hsmmc[i].vcc);
- regulator_put(hsmmc[i].vcc_aux);
- }
-}
-
-#ifdef CONFIG_PM
-
-static int twl_mmc_suspend(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 twl_mmc_resume(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 twl_mmc_suspend NULL
-#define twl_mmc_resume NULL
-#endif
-
#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
static int twl4030_mmc_get_context_loss(struct device *dev)
#define twl4030_mmc_get_context_loss NULL
#endif
-static int twl_mmc1_set_power(struct device *dev, int slot, int power_on,
- int vdd)
+static void hsmmc1_before_set_reg(struct device *dev, int slot,
+ int power_on, int vdd)
{
u32 reg, prog_io;
- int ret = 0;
- struct twl_mmc_controller *c = &hsmmc[0];
struct omap_mmc_platform_data *mmc = dev->platform_data;
/*
}
reg &= ~OMAP2_PBIASLITEPWRDNZ0;
omap_ctrl_writel(reg, control_pbias_offset);
+ } else {
+ reg = omap_ctrl_readl(control_pbias_offset);
+ reg &= ~OMAP2_PBIASLITEPWRDNZ0;
+ omap_ctrl_writel(reg, control_pbias_offset);
+ }
+}
+
+static void hsmmc1_after_set_reg(struct device *dev, int slot,
+ int power_on, int vdd)
+{
+ u32 reg;
- ret = mmc_regulator_set_ocr(c->vcc, vdd);
+ /* 100ms delay required for PBIAS configuration */
+ msleep(100);
- /* 100ms delay required for PBIAS configuration */
- msleep(100);
+ if (power_on) {
reg = omap_ctrl_readl(control_pbias_offset);
reg |= (OMAP2_PBIASLITEPWRDNZ0 | OMAP2_PBIASSPEEDCTRL0);
if ((1 << vdd) <= MMC_VDD_165_195)
reg |= OMAP2_PBIASLITEVMODE0;
omap_ctrl_writel(reg, control_pbias_offset);
} else {
- reg = omap_ctrl_readl(control_pbias_offset);
- reg &= ~OMAP2_PBIASLITEPWRDNZ0;
- omap_ctrl_writel(reg, control_pbias_offset);
-
- ret = mmc_regulator_set_ocr(c->vcc, 0);
-
- /* 100ms delay required for PBIAS configuration */
- msleep(100);
reg = omap_ctrl_readl(control_pbias_offset);
reg |= (OMAP2_PBIASSPEEDCTRL0 | OMAP2_PBIASLITEPWRDNZ0 |
OMAP2_PBIASLITEVMODE0);
omap_ctrl_writel(reg, control_pbias_offset);
}
-
- return ret;
}
-static int twl_mmc23_set_power(struct device *dev, int slot, int power_on, int vdd)
+static void hsmmc23_before_set_reg(struct device *dev, int slot,
+ int power_on, int vdd)
{
- int ret = 0;
- struct twl_mmc_controller *c = NULL;
struct omap_mmc_platform_data *mmc = dev->platform_data;
- int i;
-
- for (i = 1; i < ARRAY_SIZE(hsmmc); i++) {
- if (mmc == hsmmc[i].mmc) {
- c = &hsmmc[i];
- break;
- }
- }
-
- if (c == NULL)
- return -ENODEV;
-
- /* If we don't see a Vcc regulator, assume it's a fixed
- * voltage always-on regulator.
- */
- if (!c->vcc)
- return 0;
- /*
- * 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) {
- /* only MMC2 supports a CLKIN */
+ /* Only MMC2 supports a CLKIN */
if (mmc->slots[0].internal_clock) {
u32 reg;
reg |= OMAP2_MMCSDIO2ADPCLKISEL;
omap_ctrl_writel(reg, control_devconf1_offset);
}
- ret = mmc_regulator_set_ocr(c->vcc, vdd);
- /* enable interface voltage rail, if needed */
- if (ret == 0 && c->vcc_aux) {
- ret = regulator_enable(c->vcc_aux);
- if (ret < 0)
- ret = mmc_regulator_set_ocr(c->vcc, 0);
- }
- } else {
- if (c->vcc_aux && (ret = regulator_is_enabled(c->vcc_aux)) > 0)
- ret = regulator_disable(c->vcc_aux);
- if (ret == 0)
- ret = mmc_regulator_set_ocr(c->vcc, 0);
- }
-
- return ret;
-}
-
-static int twl_mmc1_set_sleep(struct device *dev, int slot, int sleep, int vdd,
- int cardsleep)
-{
- struct twl_mmc_controller *c = &hsmmc[0];
- int mode = sleep ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL;
-
- return regulator_set_mode(c->vcc, mode);
-}
-
-static int twl_mmc23_set_sleep(struct device *dev, int slot, int sleep, int vdd,
- int cardsleep)
-{
- struct twl_mmc_controller *c = NULL;
- struct omap_mmc_platform_data *mmc = dev->platform_data;
- int i, err, mode;
-
- for (i = 1; i < ARRAY_SIZE(hsmmc); i++) {
- if (mmc == hsmmc[i].mmc) {
- c = &hsmmc[i];
- break;
- }
}
-
- if (c == NULL)
- return -ENODEV;
-
- /*
- * If we don't see a Vcc regulator, assume it's a fixed
- * voltage always-on regulator.
- */
- if (!c->vcc)
- return 0;
-
- mode = sleep ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL;
-
- if (!c->vcc_aux)
- return regulator_set_mode(c->vcc, mode);
-
- if (cardsleep) {
- /* VCC can be turned off if card is asleep */
- struct regulator *vcc_aux = c->vcc_aux;
-
- c->vcc_aux = NULL;
- if (sleep)
- err = twl_mmc23_set_power(dev, slot, 0, 0);
- else
- err = twl_mmc23_set_power(dev, slot, 1, vdd);
- c->vcc_aux = vcc_aux;
- } else
- err = regulator_set_mode(c->vcc, mode);
- if (err)
- return err;
- return regulator_set_mode(c->vcc_aux, mode);
}
static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata;
if (cpu_is_omap2430()) {
control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE;
control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1;
- nr_hsmmc = 2;
} else {
control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE;
control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1;
mmc->slots[0].wires = c->wires;
mmc->slots[0].internal_clock = !c->ext_clock;
mmc->dma_mask = 0xffffffff;
- mmc->init = twl_mmc_late_init;
-
- /* note: twl4030 card detect GPIOs can disable VMMCx ... */
- if (gpio_is_valid(c->gpio_cd)) {
- mmc->cleanup = twl_mmc_cleanup;
- mmc->suspend = twl_mmc_suspend;
- mmc->resume = twl_mmc_resume;
-
- mmc->slots[0].switch_pin = c->gpio_cd;
- mmc->slots[0].card_detect_irq = gpio_to_irq(c->gpio_cd);
- if (c->cover_only)
- mmc->slots[0].get_cover_state = twl_mmc_get_cover_state;
- else
- mmc->slots[0].card_detect = twl_mmc_card_detect;
- } else
- mmc->slots[0].switch_pin = -EINVAL;
mmc->get_context_loss_count =
twl4030_mmc_get_context_loss;
- /* write protect normally uses an OMAP gpio */
- if (gpio_is_valid(c->gpio_wp)) {
- gpio_request(c->gpio_wp, "mmc_wp");
- gpio_direction_input(c->gpio_wp);
+ mmc->slots[0].switch_pin = c->gpio_cd;
+ mmc->slots[0].gpio_wp = c->gpio_wp;
- mmc->slots[0].gpio_wp = c->gpio_wp;
- mmc->slots[0].get_ro = twl_mmc_get_ro;
- } else
- mmc->slots[0].gpio_wp = -EINVAL;
+ if (c->cover_only)
+ mmc->slots[0].cover = 1;
if (c->nonremovable)
mmc->slots[0].nonremovable = 1;
switch (c->mmc) {
case 1:
/* on-chip level shifting via PBIAS0/PBIAS1 */
- mmc->slots[0].set_power = twl_mmc1_set_power;
- mmc->slots[0].set_sleep = twl_mmc1_set_sleep;
+ mmc->slots[0].before_set_reg = hsmmc1_before_set_reg;
+ mmc->slots[0].after_set_reg = hsmmc1_after_set_reg;
/* Omap3630 HSMMC1 supports only 4-bit */
if (cpu_is_omap3630() && c->wires > 4) {
/* FALLTHROUGH */
case 3:
/* off-chip level shifting, or none */
- mmc->slots[0].set_power = twl_mmc23_set_power;
- mmc->slots[0].set_sleep = twl_mmc23_set_sleep;
+ mmc->slots[0].before_set_reg = hsmmc23_before_set_reg;
+ mmc->slots[0].after_set_reg = NULL;
break;
default:
pr_err("MMC%d configuration not supported!\n", c->mmc);
git.openpandora.org / pandora-kernel.git / blobdiff