--- /dev/null
+/*
+ * linux/arch/arm/mach-omap2/board-sdp-hsmmc.c
+ *
+ * Copyright (C) 2007 Texas Instruments
+ * Author: Texas Instruments
+ *
+ * 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/module.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <asm/hardware.h>
+#include <asm/arch/twl4030.h>
+#include <asm/arch/mmc.h>
+#include <asm/arch/board.h>
+#include <asm/io.h>
+
+#ifdef CONFIG_MMC_OMAP_HS
+
+#define VMMC1_DEV_GRP 0x27
+#define P1_DEV_GRP 0x20
+#define VMMC1_DEDICATED 0x2A
+#define VSEL_3V 0x02
+#define VSEL_18V 0x00
+#define TWL_GPIO_PUPDCTR1 0x13
+#define TWL_GPIO_IMR1A 0x1C
+#define TWL_GPIO_ISR1A 0x19
+#define LDO_CLR 0x00
+#define VSEL_S2_CLR 0x40
+#define GPIO_0_BIT_POS 1 << 0
+#define MMC1_CD_IRQ 0
+#define MMC2_CD_IRQ 1
+
+static irqreturn_t mmc_omap_cd_handler(int irq, void *dev_id)
+{
+ int detect;
+
+ detect = twl4030_get_gpio_datain(MMC1_CD_IRQ);
+ omap_mmc_notify_card_detect(dev_id, 0, detect);
+ return IRQ_HANDLED;
+}
+
+/*
+ * MMC Slot Initialization.
+ */
+static int sdp_mmc_late_init(struct device *dev)
+{
+ int ret = 0;
+
+ /*
+ * Configure TWL4030 GPIO parameters for MMC hotplug irq
+ */
+ ret = twl4030_request_gpio(MMC1_CD_IRQ);
+ if (ret != 0)
+ goto err;
+
+ ret = twl4030_set_gpio_edge_ctrl(MMC1_CD_IRQ,
+ TWL4030_GPIO_EDGE_RISING | TWL4030_GPIO_EDGE_FALLING);
+ if (ret != 0)
+ goto err;
+
+ ret = twl4030_i2c_write_u8(TWL4030_MODULE_GPIO, 0x02,
+ TWL_GPIO_PUPDCTR1);
+ if (ret != 0)
+ goto err;
+
+ ret = twl4030_set_gpio_debounce(MMC1_CD_IRQ, TWL4030_GPIO_IS_ENABLE);
+ if (ret != 0)
+ goto err;
+
+ ret = request_irq(TWL4030_GPIO_IRQ_NO(MMC1_CD_IRQ),
+ mmc_omap_cd_handler, IRQF_DISABLED, "MMC1_CD_IRQ", dev);
+ if (ret < 0)
+ goto err;
+
+ return ret;
+err:
+ dev_err(dev, "Failed to configure TWL4030 GPIO IRQ\n");
+
+ return ret;
+}
+
+static void sdp_mmc_cleanup(struct device *dev)
+{
+ int ret = 0;
+
+ ret = twl4030_free_gpio(MMC1_CD_IRQ);
+ free_irq(TWL4030_GPIO_IRQ_NO(MMC1_CD_IRQ), dev);
+ if (ret != 0)
+ dev_err(dev, "Failed to configure TWL4030 GPIO IRQ\n");
+}
+
+#ifdef CONFIG_PM
+
+/*
+ * To mask and unmask MMC Card Detect Interrupt
+ * mask : 1
+ * unmask : 0
+ */
+static int mask_cd_interrupt(int mask)
+{
+ u8 reg = 0, ret = 0;
+
+ ret = twl4030_i2c_read_u8(TWL4030_MODULE_GPIO, ®, TWL_GPIO_IMR1A);
+ if (ret != 0)
+ goto err;
+
+ reg = (mask == 1) ? (reg | GPIO_0_BIT_POS) : (reg & ~GPIO_0_BIT_POS);
+
+ ret = twl4030_i2c_write_u8(TWL4030_MODULE_GPIO, reg, TWL_GPIO_IMR1A);
+ if (ret != 0)
+ goto err;
+
+ ret = twl4030_i2c_read_u8(TWL4030_MODULE_GPIO, ®, TWL_GPIO_ISR1A);
+ if (ret != 0)
+ goto err;
+
+ reg = (mask == 1) ? (reg | GPIO_0_BIT_POS) : (reg & ~GPIO_0_BIT_POS);
+
+ ret = twl4030_i2c_write_u8(TWL4030_MODULE_GPIO, reg, TWL_GPIO_ISR1A);
+ if (ret != 0)
+ goto err;
+err:
+ return ret;
+}
+
+static int sdp_mmc_suspend(struct device *dev, int slot)
+{
+ int ret = 0;
+
+ disable_irq(TWL4030_GPIO_IRQ_NO(MMC1_CD_IRQ));
+ ret = mask_cd_interrupt(1);
+
+ return ret;
+}
+
+static int sdp_mmc_resume(struct device *dev, int slot)
+{
+ int ret = 0;
+
+ enable_irq(TWL4030_GPIO_IRQ_NO(MMC1_CD_IRQ));
+ ret = mask_cd_interrupt(0);
+
+ return ret;
+}
+
+#endif
+
+static int sdp_mmc_set_power(struct device *dev, int slot, int power_on,
+ int vdd)
+{
+ u32 vdd_sel = 0, devconf = 0, reg = 0;
+ int ret = 0;
+
+ /* REVISIT: Using address directly till the control.h defines
+ * are settled.
+ */
+#if defined(CONFIG_ARCH_OMAP2430)
+ #define OMAP2_CONTROL_PBIAS 0x490024A0
+#else
+ #define OMAP2_CONTROL_PBIAS 0x48002520
+#endif
+
+ if (power_on == 1) {
+ if (cpu_is_omap24xx())
+ devconf = omap_readl(0x490022E8);
+ else
+ devconf = omap_readl(0x48002274);
+
+ switch (1 << vdd) {
+ case MMC_VDD_33_34:
+ case MMC_VDD_32_33:
+ vdd_sel = VSEL_3V;
+ if (cpu_is_omap24xx())
+ devconf = (reg | (1 << 31));
+ break;
+ case MMC_VDD_165_195:
+ vdd_sel = VSEL_18V;
+ if (cpu_is_omap24xx())
+ devconf = (devconf & ~(1 << 31));
+ }
+
+ if (cpu_is_omap24xx())
+ omap_writel(devconf, 0x490022E8);
+ else
+ omap_writel(devconf | 1 << 24, 0x48002274);
+
+ omap_writel(omap_readl(OMAP2_CONTROL_PBIAS) | 1 << 2,
+ OMAP2_CONTROL_PBIAS);
+ omap_writel(omap_readl(OMAP2_CONTROL_PBIAS) & ~(1 << 1),
+ OMAP2_CONTROL_PBIAS);
+
+ ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+ P1_DEV_GRP, VMMC1_DEV_GRP);
+ if (ret != 0)
+ goto err;
+
+ ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+ vdd_sel, VMMC1_DEDICATED);
+ if (ret != 0)
+ goto err;
+
+ msleep(100);
+ reg = omap_readl(OMAP2_CONTROL_PBIAS);
+ reg = (vdd_sel == VSEL_18V) ? ((reg | 0x6) & ~0x1)
+ : (reg | 0x7);
+ omap_writel(reg, OMAP2_CONTROL_PBIAS);
+
+ return ret;
+
+ } else if (power_on == 0) {
+ /* Power OFF */
+
+ /* For MMC1, Toggle PBIAS before every power up sequence */
+ omap_writel(omap_readl(OMAP2_CONTROL_PBIAS) & ~(1 << 1),
+ OMAP2_CONTROL_PBIAS);
+ ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+ LDO_CLR, VMMC1_DEV_GRP);
+ if (ret != 0)
+ goto err;
+
+ ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+ VSEL_S2_CLR, VMMC1_DEDICATED);
+ if (ret != 0)
+ goto err;
+
+ /* 100ms delay required for PBIAS configuration */
+ msleep(100);
+ omap_writel(omap_readl(OMAP2_CONTROL_PBIAS) | 0x7,
+ OMAP2_CONTROL_PBIAS);
+ } else {
+ ret = -1;
+ goto err;
+ }
+
+ return 0;
+err:
+ return 1;
+}
+
+static struct omap_mmc_platform_data sdp_mmc_data = {
+ .nr_slots = 1,
+ .switch_slot = NULL,
+ .init = sdp_mmc_late_init,
+ .cleanup = sdp_mmc_cleanup,
+#ifdef CONFIG_PM
+ .suspend = sdp_mmc_suspend,
+ .resume = sdp_mmc_resume,
+#endif
+ .slots[0] = {
+ .set_power = sdp_mmc_set_power,
+ .set_bus_mode = NULL,
+ .get_ro = NULL,
+ .get_cover_state = NULL,
+ .ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34 |
+ MMC_VDD_165_195,
+ .name = "first slot",
+ },
+};
+
+void __init sdp_mmc_init(void)
+{
+ omap_set_mmc_info(1, &sdp_mmc_data);
+}
+
+#else
+
+void __init sdp_mmc_init(void)
+{
+
+}
+
+#endif
projects / linux-2.6-omap-h63xx.git / commitdiff