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+/*
+ * linux/arch/arm/mach-omap2/mmc-am3517evm.c
+ *
+ * Copyright (C) 2009 Texas Instruments Incorporated
+ * Author: Anuj Aggarwal <anuj.aggarwal@ti.com>
+ *
+ * Based on mach-omap2/mmc-twl4030.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * 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/delay.h>
+#include <linux/gpio.h>
+
+#include <mach/hardware.h>
+#include <plat/control.h>
+#include <plat/mmc.h>
+#include <plat/board.h>
+#include "mmc-am3517evm.h"
+
+#define LDO_CLR 0x00
+#define VSEL_S2_CLR 0x40
+
+#define VMMC1_DEV_GRP 0x27
+#define VMMC1_CLR 0x00
+#define VMMC1_315V 0x03
+#define VMMC1_300V 0x02
+#define VMMC1_285V 0x01
+#define VMMC1_185V 0x00
+#define VMMC1_DEDICATED 0x2A
+
+#define VMMC2_DEV_GRP 0x2B
+#define VMMC2_CLR 0x40
+#define VMMC2_315V 0x0c
+#define VMMC2_300V 0x0b
+#define VMMC2_285V 0x0a
+#define VMMC2_260V 0x08
+#define VMMC2_185V 0x06
+#define VMMC2_DEDICATED 0x2E
+
+#define VMMC_DEV_GRP_P1 0x20
+
+#define HSMMC_NAME_LEN 9
+
+#if defined(CONFIG_REGULATOR) || \
+ (defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE) || \
+ defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE))
+
+/*
+ * MMC definitions
+ *
+ */
+static struct mmc_controller {
+ struct omap_mmc_platform_data *mmc;
+ u8 vmmc_dev_grp;
+ u8 vmmc_dedicated;
+ char name[HSMMC_NAME_LEN];
+} hsmmc[] = {
+ {
+ .vmmc_dev_grp = VMMC1_DEV_GRP,
+ .vmmc_dedicated = VMMC1_DEDICATED,
+ },
+ {
+ .vmmc_dev_grp = VMMC2_DEV_GRP,
+ .vmmc_dedicated = VMMC2_DEDICATED,
+ },
+};
+
+static int 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 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);
+}
+
+/*
+ * MMC Slot Initialization.
+ */
+static int mmc_late_init(struct device *dev)
+{
+ struct omap_mmc_platform_data *mmc = dev->platform_data;
+ int ret = 0;
+ int i;
+
+ 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;
+
+ for (i = 0; i < ARRAY_SIZE(hsmmc); i++) {
+ if (hsmmc[i].name == mmc->slots[0].name) {
+ hsmmc[i].mmc = mmc;
+ 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 mmc_cleanup(struct device *dev)
+{
+ struct omap_mmc_platform_data *mmc = dev->platform_data;
+
+ gpio_free(mmc->slots[0].switch_pin);
+}
+
+#ifdef CONFIG_PM
+
+static int 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 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 mmc_suspend NULL
+#define mmc_resume NULL
+#endif
+
+/*
+ * the MMC power setting function
+ */
+
+static int mmc1_set_power(struct device *dev, int slot, int power_on,
+ int vdd)
+{
+ return 0;
+}
+
+static int mmc2_set_power(struct device *dev, int slot, int power_on, int vdd)
+{
+ return 0;
+}
+
+static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata;
+
+void __init am3517_mmc_init(struct am3517_hsmmc_info *controllers)
+{
+ struct am3517_hsmmc_info *c;
+ int nr_hsmmc = ARRAY_SIZE(hsmmc_data);
+
+ for (c = controllers; c->mmc; c++) {
+ struct mmc_controller *mmc_control = hsmmc + c->mmc - 1;
+ struct omap_mmc_platform_data *mmc = hsmmc_data[c->mmc - 1];
+
+ if (!c->mmc || c->mmc > nr_hsmmc) {
+ pr_debug("MMC%d: no such controller\n", c->mmc);
+ continue;
+ }
+ if (mmc) {
+ pr_debug("MMC%d: already configured\n", c->mmc);
+ continue;
+ }
+
+ mmc = kzalloc(sizeof(struct omap_mmc_platform_data),
+ GFP_KERNEL);
+ if (!mmc) {
+ pr_err("Cannot allocate memory for mmc device!\n");
+ return;
+ }
+
+ sprintf(mmc_control->name, "mmc%islot%i", c->mmc, 1);
+ mmc->slots[0].name = mmc_control->name;
+ mmc->nr_slots = 1;
+ mmc->slots[0].ocr_mask = MMC_VDD_165_195 |
+ MMC_VDD_26_27 | MMC_VDD_27_28 |
+ MMC_VDD_29_30 |
+ MMC_VDD_30_31 | MMC_VDD_31_32;
+ mmc->slots[0].wires = c->wires;
+ mmc->slots[0].internal_clock = !c->ext_clock;
+ mmc->dma_mask = 0xffffffff;
+
+ if (1) {
+ mmc->init = mmc_late_init;
+ mmc->cleanup = mmc_cleanup;
+ mmc->suspend = mmc_suspend;
+ mmc->resume = mmc_resume;
+
+ mmc->slots[0].switch_pin = c->gpio_cd;
+ mmc->slots[0].card_detect_irq = gpio_to_irq(c->gpio_cd);
+ mmc->slots[0].card_detect = mmc_card_detect;
+ } else
+ mmc->slots[0].switch_pin = -EINVAL;
+
+ /* 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].gpio_wp = c->gpio_wp;
+ mmc->slots[0].get_ro = mmc_get_ro;
+ } else
+ mmc->slots[0].gpio_wp = -EINVAL;
+
+ /* NOTE: we assume OMAP's MMC1 and MMC2 use
+ * the TWL4030's VMMC1 and VMMC2, respectively;
+ * and that OMAP's MMC3 isn't used.
+ */
+
+ switch (c->mmc) {
+ case 1:
+ mmc->slots[0].set_power = mmc1_set_power;
+ break;
+ case 2:
+ mmc->slots[0].set_power = mmc2_set_power;
+ break;
+ default:
+ pr_err("MMC%d configuration not supported!\n", c->mmc);
+ continue;
+ }
+ hsmmc_data[c->mmc - 1] = mmc;
+ }
+
+ omap2_init_mmc(hsmmc_data, OMAP34XX_NR_MMC);
+}
+#else
+inline void am3517_mmc_init(struct am3517_hsmmc_info *info)
+{
+}
+#endif
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+/*
+ * MMC definitions for OMAP3517 / AM3517
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+struct am3517_hsmmc_info {
+ u8 mmc; /* controller 1/2/3 */
+ u8 wires; /* 1/4/8 wires */
+ bool transceiver; /* MMC-2 option */
+ bool ext_clock; /* use external pin for input clock */
+ bool cover_only; /* No card detect - just cover switch */
+ int gpio_cd; /* or -EINVAL */
+ int gpio_wp; /* or -EINVAL */
+ char *name; /* or NULL for default */
+ struct device *dev; /* returned: pointer to mmc adapter */
+ int ocr_mask; /* temporary HACK */
+};
+
+void am3517_mmc_init(struct am3517_hsmmc_info *);