187 lines
4.5 KiB
C
187 lines
4.5 KiB
C
/* linux/arch/arm/mach-msm/board-trout-mmc.c
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** Author: Brian Swetland <swetland@google.com>
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/sdio_ids.h>
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#include <linux/err.h>
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#include <linux/debugfs.h>
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#include <asm/gpio.h>
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#include <asm/io.h>
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#include <mach/vreg.h>
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#include <mach/mmc.h>
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#include "devices.h"
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#include "board-trout.h"
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#include "proc_comm.h"
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#define DEBUG_SDSLOT_VDD 1
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/* ---- COMMON ---- */
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static void config_gpio_table(uint32_t *table, int len)
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{
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int n;
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unsigned id;
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for(n = 0; n < len; n++) {
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id = table[n];
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msm_proc_comm(PCOM_RPC_GPIO_TLMM_CONFIG_EX, &id, 0);
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}
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}
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/* ---- SDCARD ---- */
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static uint32_t sdcard_on_gpio_table[] = {
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PCOM_GPIO_CFG(62, 2, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_8MA), /* CLK */
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PCOM_GPIO_CFG(63, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), /* CMD */
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PCOM_GPIO_CFG(64, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), /* DAT3 */
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PCOM_GPIO_CFG(65, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), /* DAT2 */
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PCOM_GPIO_CFG(66, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_4MA), /* DAT1 */
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PCOM_GPIO_CFG(67, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_4MA), /* DAT0 */
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};
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static uint32_t sdcard_off_gpio_table[] = {
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PCOM_GPIO_CFG(62, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* CLK */
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PCOM_GPIO_CFG(63, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* CMD */
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PCOM_GPIO_CFG(64, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT3 */
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PCOM_GPIO_CFG(65, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT2 */
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PCOM_GPIO_CFG(66, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT1 */
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PCOM_GPIO_CFG(67, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT0 */
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};
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static uint opt_disable_sdcard;
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static int __init trout_disablesdcard_setup(char *str)
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{
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int cal = simple_strtol(str, NULL, 0);
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opt_disable_sdcard = cal;
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return 1;
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}
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__setup("board_trout.disable_sdcard=", trout_disablesdcard_setup);
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static struct vreg *vreg_sdslot; /* SD slot power */
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struct mmc_vdd_xlat {
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int mask;
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int level;
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};
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static struct mmc_vdd_xlat mmc_vdd_table[] = {
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{ MMC_VDD_165_195, 1800 },
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{ MMC_VDD_20_21, 2050 },
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{ MMC_VDD_21_22, 2150 },
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{ MMC_VDD_22_23, 2250 },
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{ MMC_VDD_23_24, 2350 },
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{ MMC_VDD_24_25, 2450 },
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{ MMC_VDD_25_26, 2550 },
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{ MMC_VDD_26_27, 2650 },
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{ MMC_VDD_27_28, 2750 },
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{ MMC_VDD_28_29, 2850 },
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{ MMC_VDD_29_30, 2950 },
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};
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static unsigned int sdslot_vdd = 0xffffffff;
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static unsigned int sdslot_vreg_enabled;
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static uint32_t trout_sdslot_switchvdd(struct device *dev, unsigned int vdd)
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{
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int i, rc;
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BUG_ON(!vreg_sdslot);
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if (vdd == sdslot_vdd)
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return 0;
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sdslot_vdd = vdd;
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if (vdd == 0) {
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#if DEBUG_SDSLOT_VDD
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printk("%s: Disabling SD slot power\n", __func__);
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#endif
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config_gpio_table(sdcard_off_gpio_table,
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ARRAY_SIZE(sdcard_off_gpio_table));
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vreg_disable(vreg_sdslot);
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sdslot_vreg_enabled = 0;
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return 0;
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}
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if (!sdslot_vreg_enabled) {
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rc = vreg_enable(vreg_sdslot);
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if (rc) {
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printk(KERN_ERR "%s: Error enabling vreg (%d)\n",
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__func__, rc);
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}
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config_gpio_table(sdcard_on_gpio_table,
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ARRAY_SIZE(sdcard_on_gpio_table));
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sdslot_vreg_enabled = 1;
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}
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for (i = 0; i < ARRAY_SIZE(mmc_vdd_table); i++) {
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if (mmc_vdd_table[i].mask == (1 << vdd)) {
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#if DEBUG_SDSLOT_VDD
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printk("%s: Setting level to %u\n",
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__func__, mmc_vdd_table[i].level);
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#endif
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rc = vreg_set_level(vreg_sdslot,
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mmc_vdd_table[i].level);
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if (rc) {
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printk(KERN_ERR
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"%s: Error setting vreg level (%d)\n",
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__func__, rc);
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}
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return 0;
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}
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}
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printk(KERN_ERR "%s: Invalid VDD %d specified\n", __func__, vdd);
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return 0;
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}
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static unsigned int trout_sdslot_status(struct device *dev)
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{
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unsigned int status;
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status = (unsigned int) gpio_get_value(TROUT_GPIO_SDMC_CD_N);
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return (!status);
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}
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#define TROUT_MMC_VDD MMC_VDD_165_195 | MMC_VDD_20_21 | MMC_VDD_21_22 \
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| MMC_VDD_22_23 | MMC_VDD_23_24 | MMC_VDD_24_25 \
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| MMC_VDD_25_26 | MMC_VDD_26_27 | MMC_VDD_27_28 \
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| MMC_VDD_28_29 | MMC_VDD_29_30
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static struct msm_mmc_platform_data trout_sdslot_data = {
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.ocr_mask = TROUT_MMC_VDD,
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.status = trout_sdslot_status,
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.translate_vdd = trout_sdslot_switchvdd,
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};
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int __init trout_init_mmc(unsigned int sys_rev)
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{
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sdslot_vreg_enabled = 0;
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vreg_sdslot = vreg_get(0, "gp6");
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if (IS_ERR(vreg_sdslot))
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return PTR_ERR(vreg_sdslot);
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irq_set_irq_wake(TROUT_GPIO_TO_INT(TROUT_GPIO_SDMC_CD_N), 1);
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if (!opt_disable_sdcard)
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msm_add_sdcc(2, &trout_sdslot_data,
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TROUT_GPIO_TO_INT(TROUT_GPIO_SDMC_CD_N), 0);
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else
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printk(KERN_INFO "trout: SD-Card interface disabled\n");
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return 0;
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}
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