arm: msm: trout add mmc support

This adds the platform data for MMC on trout.

Signed-off-by: Daniel Walker <dwalker@codeaurora.org>

1 files changed, 189 insertions, 0 deletions

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 000000000000..7a773f8c13dc
--- /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@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;
+}
+