[PATCH 4/4] arm: msm: trout add mmc support
Daniel Walker
dwalker at codeaurora.org
Tue Mar 30 19:11:57 EDT 2010
This adds the platform data for MMC on trout.
Signed-off-by: Daniel Walker <dwalker at codeaurora.org>
---
arch/arm/mach-msm/Makefile | 2 +-
arch/arm/mach-msm/board-trout-mmc.c | 189 +++++++++++++++++++++++++++++++++++
arch/arm/mach-msm/board-trout.c | 11 ++
3 files changed, 201 insertions(+), 1 deletions(-)
create mode 100644 arch/arm/mach-msm/board-trout-mmc.c
diff --git a/arch/arm/mach-msm/Makefile b/arch/arm/mach-msm/Makefile
index fb9ab2d..cde59dc 100644
--- a/arch/arm/mach-msm/Makefile
+++ b/arch/arm/mach-msm/Makefile
@@ -9,5 +9,5 @@ obj-y += gpio.o
obj-$(CONFIG_MSM_SMD) += smd.o smd_debug.o
obj-$(CONFIG_MSM_SMD) += last_radio_log.o
-obj-$(CONFIG_MACH_TROUT) += board-trout.o board-trout-gpio.o
+obj-$(CONFIG_MACH_TROUT) += board-trout.o board-trout-gpio.o board-trout-mmc.o
obj-$(CONFIG_MACH_HALIBUT) += board-halibut.o
diff --git a/arch/arm/mach-msm/board-trout-mmc.c b/arch/arm/mach-msm/board-trout-mmc.c
new file mode 100644
index 0000000..7a773f8
--- /dev/null
+++ b/arch/arm/mach-msm/board-trout-mmc.c
@@ -0,0 +1,189 @@
+/* linux/arch/arm/mach-msm/board-trout-mmc.c
+** Author: Brian Swetland <swetland at google.com>
+*/
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/sdio_ids.h>
+#include <linux/err.h>
+#include <linux/debugfs.h>
+
+#include <asm/gpio.h>
+#include <asm/io.h>
+
+#include <mach/vreg.h>
+
+#include <mach/mmc.h>
+
+#include "devices.h"
+
+#include "board-trout.h"
+
+#include "proc_comm.h"
+
+#define DEBUG_SDSLOT_VDD 1
+
+extern int msm_add_sdcc(unsigned int controller, struct mmc_platform_data *plat,
+ unsigned int stat_irq, unsigned long stat_irq_flags);
+
+/* ---- COMMON ---- */
+static void config_gpio_table(uint32_t *table, int len)
+{
+ int n;
+ unsigned id;
+ for(n = 0; n < len; n++) {
+ id = table[n];
+ msm_proc_comm(PCOM_RPC_GPIO_TLMM_CONFIG_EX, &id, 0);
+ }
+}
+
+/* ---- SDCARD ---- */
+
+static uint32_t sdcard_on_gpio_table[] = {
+ PCOM_GPIO_CFG(62, 2, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_8MA), /* CLK */
+ PCOM_GPIO_CFG(63, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), /* CMD */
+ PCOM_GPIO_CFG(64, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), /* DAT3 */
+ PCOM_GPIO_CFG(65, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), /* DAT2 */
+ PCOM_GPIO_CFG(66, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_4MA), /* DAT1 */
+ PCOM_GPIO_CFG(67, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_4MA), /* DAT0 */
+};
+
+static uint32_t sdcard_off_gpio_table[] = {
+ PCOM_GPIO_CFG(62, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* CLK */
+ PCOM_GPIO_CFG(63, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* CMD */
+ PCOM_GPIO_CFG(64, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT3 */
+ PCOM_GPIO_CFG(65, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT2 */
+ PCOM_GPIO_CFG(66, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT1 */
+ PCOM_GPIO_CFG(67, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT0 */
+};
+
+static uint opt_disable_sdcard;
+
+static int __init trout_disablesdcard_setup(char *str)
+{
+ int cal = simple_strtol(str, NULL, 0);
+
+ opt_disable_sdcard = cal;
+ return 1;
+}
+
+__setup("board_trout.disable_sdcard=", trout_disablesdcard_setup);
+
+static struct vreg *vreg_sdslot; /* SD slot power */
+
+struct mmc_vdd_xlat {
+ int mask;
+ int level;
+};
+
+static struct mmc_vdd_xlat mmc_vdd_table[] = {
+ { MMC_VDD_165_195, 1800 },
+ { MMC_VDD_20_21, 2050 },
+ { MMC_VDD_21_22, 2150 },
+ { MMC_VDD_22_23, 2250 },
+ { MMC_VDD_23_24, 2350 },
+ { MMC_VDD_24_25, 2450 },
+ { MMC_VDD_25_26, 2550 },
+ { MMC_VDD_26_27, 2650 },
+ { MMC_VDD_27_28, 2750 },
+ { MMC_VDD_28_29, 2850 },
+ { MMC_VDD_29_30, 2950 },
+};
+
+static unsigned int sdslot_vdd = 0xffffffff;
+static unsigned int sdslot_vreg_enabled;
+
+static uint32_t trout_sdslot_switchvdd(struct device *dev, unsigned int vdd)
+{
+ int i, rc;
+
+ BUG_ON(!vreg_sdslot);
+
+ if (vdd == sdslot_vdd)
+ return 0;
+
+ sdslot_vdd = vdd;
+
+ if (vdd == 0) {
+#if DEBUG_SDSLOT_VDD
+ printk("%s: Disabling SD slot power\n", __func__);
+#endif
+ config_gpio_table(sdcard_off_gpio_table,
+ ARRAY_SIZE(sdcard_off_gpio_table));
+ vreg_disable(vreg_sdslot);
+ sdslot_vreg_enabled = 0;
+ return 0;
+ }
+
+ if (!sdslot_vreg_enabled) {
+ rc = vreg_enable(vreg_sdslot);
+ if (rc) {
+ printk(KERN_ERR "%s: Error enabling vreg (%d)\n",
+ __func__, rc);
+ }
+ config_gpio_table(sdcard_on_gpio_table,
+ ARRAY_SIZE(sdcard_on_gpio_table));
+ sdslot_vreg_enabled = 1;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(mmc_vdd_table); i++) {
+ if (mmc_vdd_table[i].mask == (1 << vdd)) {
+#if DEBUG_SDSLOT_VDD
+ printk("%s: Setting level to %u\n",
+ __func__, mmc_vdd_table[i].level);
+#endif
+ rc = vreg_set_level(vreg_sdslot,
+ mmc_vdd_table[i].level);
+ if (rc) {
+ printk(KERN_ERR
+ "%s: Error setting vreg level (%d)\n",
+ __func__, rc);
+ }
+ return 0;
+ }
+ }
+
+ printk(KERN_ERR "%s: Invalid VDD %d specified\n", __func__, vdd);
+ return 0;
+}
+
+static unsigned int trout_sdslot_status(struct device *dev)
+{
+ unsigned int status;
+
+ status = (unsigned int) gpio_get_value(TROUT_GPIO_SDMC_CD_N);
+ return (!status);
+}
+
+#define TROUT_MMC_VDD MMC_VDD_165_195 | MMC_VDD_20_21 | MMC_VDD_21_22 \
+ | MMC_VDD_22_23 | MMC_VDD_23_24 | MMC_VDD_24_25 \
+ | MMC_VDD_25_26 | MMC_VDD_26_27 | MMC_VDD_27_28 \
+ | MMC_VDD_28_29 | MMC_VDD_29_30
+
+static struct mmc_platform_data trout_sdslot_data = {
+ .ocr_mask = TROUT_MMC_VDD,
+ .status = trout_sdslot_status,
+ .translate_vdd = trout_sdslot_switchvdd,
+};
+
+int __init trout_init_mmc(unsigned int sys_rev)
+{
+ sdslot_vreg_enabled = 0;
+
+ vreg_sdslot = vreg_get(0, "gp6");
+ if (IS_ERR(vreg_sdslot))
+ return PTR_ERR(vreg_sdslot);
+
+ set_irq_wake(TROUT_GPIO_TO_INT(TROUT_GPIO_SDMC_CD_N), 1);
+
+ if (!opt_disable_sdcard)
+ msm_add_sdcc(2, &trout_sdslot_data,
+ TROUT_GPIO_TO_INT(TROUT_GPIO_SDMC_CD_N), 0);
+ else
+ printk(KERN_INFO "trout: SD-Card interface disabled\n");
+ return 0;
+}
+
diff --git a/arch/arm/mach-msm/board-trout.c b/arch/arm/mach-msm/board-trout.c
index 9793ff4..49d550e 100644
--- a/arch/arm/mach-msm/board-trout.c
+++ b/arch/arm/mach-msm/board-trout.c
@@ -30,6 +30,8 @@
#include "devices.h"
#include "board-trout.h"
+extern int trout_init_mmc(unsigned int);
+
static struct platform_device *devices[] __initdata = {
&msm_device_uart3,
&msm_device_smd,
@@ -56,7 +58,16 @@ static void __init trout_fixup(struct machine_desc *desc, struct tag *tags,
static void __init trout_init(void)
{
+ int rc;
+
platform_add_devices(devices, ARRAY_SIZE(devices));
+
+#ifdef CONFIG_MMC
+ rc = trout_init_mmc(system_rev);
+ if (rc)
+ printk(KERN_CRIT "%s: MMC init failure (%d)\n", __func__, rc);
+#endif
+
}
static struct map_desc trout_io_desc[] __initdata = {
--
1.6.2.3
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