525 lines
14 KiB
C
525 lines
14 KiB
C
/*
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* linux/arch/arm/mach-omap2/hsmmc.c
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*
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* Copyright (C) 2007-2008 Texas Instruments
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* Copyright (C) 2008 Nokia Corporation
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* Author: Texas Instruments
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <mach/hardware.h>
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#include <plat/mmc.h>
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#include <plat/omap-pm.h>
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#include <plat/mux.h>
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#include <plat/omap_device.h>
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#include "mux.h"
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#include "hsmmc.h"
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#include "control.h"
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#if defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
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static u16 control_pbias_offset;
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static u16 control_devconf1_offset;
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static u16 control_mmc1;
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#define HSMMC_NAME_LEN 9
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#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
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static int hsmmc_get_context_loss(struct device *dev)
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{
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return omap_pm_get_dev_context_loss_count(dev);
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}
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#else
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#define hsmmc_get_context_loss NULL
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#endif
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static void omap_hsmmc1_before_set_reg(struct device *dev, int slot,
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int power_on, int vdd)
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{
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u32 reg, prog_io;
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struct omap_mmc_platform_data *mmc = dev->platform_data;
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if (mmc->slots[0].remux)
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mmc->slots[0].remux(dev, slot, power_on);
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/*
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* Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the
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* card with Vcc regulator (from twl4030 or whatever). OMAP has both
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* 1.8V and 3.0V modes, controlled by the PBIAS register.
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*
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* In 8-bit modes, OMAP VMMC1A (for DAT4..7) needs a supply, which
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* is most naturally TWL VSIM; those pins also use PBIAS.
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*
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* FIXME handle VMMC1A as needed ...
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*/
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if (power_on) {
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if (cpu_is_omap2430()) {
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reg = omap_ctrl_readl(OMAP243X_CONTROL_DEVCONF1);
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if ((1 << vdd) >= MMC_VDD_30_31)
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reg |= OMAP243X_MMC1_ACTIVE_OVERWRITE;
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else
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reg &= ~OMAP243X_MMC1_ACTIVE_OVERWRITE;
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omap_ctrl_writel(reg, OMAP243X_CONTROL_DEVCONF1);
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}
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if (mmc->slots[0].internal_clock) {
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reg = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
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reg |= OMAP2_MMCSDIO1ADPCLKISEL;
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omap_ctrl_writel(reg, OMAP2_CONTROL_DEVCONF0);
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}
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reg = omap_ctrl_readl(control_pbias_offset);
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if (cpu_is_omap3630()) {
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/* Set MMC I/O to 52Mhz */
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prog_io = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
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prog_io |= OMAP3630_PRG_SDMMC1_SPEEDCTRL;
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omap_ctrl_writel(prog_io, OMAP343X_CONTROL_PROG_IO1);
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} else {
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reg |= OMAP2_PBIASSPEEDCTRL0;
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}
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reg &= ~OMAP2_PBIASLITEPWRDNZ0;
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omap_ctrl_writel(reg, control_pbias_offset);
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} else {
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reg = omap_ctrl_readl(control_pbias_offset);
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reg &= ~OMAP2_PBIASLITEPWRDNZ0;
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omap_ctrl_writel(reg, control_pbias_offset);
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}
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}
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static void omap_hsmmc1_after_set_reg(struct device *dev, int slot,
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int power_on, int vdd)
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{
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u32 reg;
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/* 100ms delay required for PBIAS configuration */
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msleep(100);
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if (power_on) {
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reg = omap_ctrl_readl(control_pbias_offset);
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reg |= (OMAP2_PBIASLITEPWRDNZ0 | OMAP2_PBIASSPEEDCTRL0);
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if ((1 << vdd) <= MMC_VDD_165_195)
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reg &= ~OMAP2_PBIASLITEVMODE0;
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else
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reg |= OMAP2_PBIASLITEVMODE0;
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omap_ctrl_writel(reg, control_pbias_offset);
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} else {
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reg = omap_ctrl_readl(control_pbias_offset);
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reg |= (OMAP2_PBIASSPEEDCTRL0 | OMAP2_PBIASLITEPWRDNZ0 |
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OMAP2_PBIASLITEVMODE0);
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omap_ctrl_writel(reg, control_pbias_offset);
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}
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}
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static void omap4_hsmmc1_before_set_reg(struct device *dev, int slot,
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int power_on, int vdd)
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{
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u32 reg;
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/*
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* Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the
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* card with Vcc regulator (from twl4030 or whatever). OMAP has both
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* 1.8V and 3.0V modes, controlled by the PBIAS register.
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*
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* In 8-bit modes, OMAP VMMC1A (for DAT4..7) needs a supply, which
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* is most naturally TWL VSIM; those pins also use PBIAS.
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*
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* FIXME handle VMMC1A as needed ...
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*/
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reg = omap4_ctrl_pad_readl(control_pbias_offset);
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reg &= ~(OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK |
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OMAP4_MMC1_PWRDNZ_MASK |
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OMAP4_USBC1_ICUSB_PWRDNZ_MASK);
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omap4_ctrl_pad_writel(reg, control_pbias_offset);
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}
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static void omap4_hsmmc1_after_set_reg(struct device *dev, int slot,
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int power_on, int vdd)
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{
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u32 reg;
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unsigned long timeout;
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if (power_on) {
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reg = omap4_ctrl_pad_readl(control_pbias_offset);
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reg |= OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK;
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if ((1 << vdd) <= MMC_VDD_165_195)
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reg &= ~OMAP4_MMC1_PBIASLITE_VMODE_MASK;
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else
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reg |= OMAP4_MMC1_PBIASLITE_VMODE_MASK;
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reg |= (OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK |
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OMAP4_MMC1_PWRDNZ_MASK |
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OMAP4_USBC1_ICUSB_PWRDNZ_MASK);
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omap4_ctrl_pad_writel(reg, control_pbias_offset);
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timeout = jiffies + msecs_to_jiffies(5);
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do {
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reg = omap4_ctrl_pad_readl(control_pbias_offset);
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if (!(reg & OMAP4_MMC1_PBIASLITE_VMODE_ERROR_MASK))
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break;
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usleep_range(100, 200);
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} while (!time_after(jiffies, timeout));
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if (reg & OMAP4_MMC1_PBIASLITE_VMODE_ERROR_MASK) {
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pr_err("Pbias Voltage is not same as LDO\n");
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/* Caution : On VMODE_ERROR Power Down MMC IO */
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reg &= ~(OMAP4_MMC1_PWRDNZ_MASK |
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OMAP4_USBC1_ICUSB_PWRDNZ_MASK);
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omap4_ctrl_pad_writel(reg, control_pbias_offset);
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}
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} else {
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reg = omap4_ctrl_pad_readl(control_pbias_offset);
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reg |= (OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK |
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OMAP4_MMC1_PWRDNZ_MASK |
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OMAP4_MMC1_PBIASLITE_VMODE_MASK |
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OMAP4_USBC1_ICUSB_PWRDNZ_MASK);
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omap4_ctrl_pad_writel(reg, control_pbias_offset);
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}
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}
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static void hsmmc23_before_set_reg(struct device *dev, int slot,
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int power_on, int vdd)
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{
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struct omap_mmc_platform_data *mmc = dev->platform_data;
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if (mmc->slots[0].remux)
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mmc->slots[0].remux(dev, slot, power_on);
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if (power_on) {
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/* Only MMC2 supports a CLKIN */
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if (mmc->slots[0].internal_clock) {
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u32 reg;
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reg = omap_ctrl_readl(control_devconf1_offset);
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reg |= OMAP2_MMCSDIO2ADPCLKISEL;
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omap_ctrl_writel(reg, control_devconf1_offset);
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}
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}
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}
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static int nop_mmc_set_power(struct device *dev, int slot, int power_on,
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int vdd)
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{
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return 0;
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}
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static inline void omap_hsmmc_mux(struct omap_mmc_platform_data *mmc_controller,
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int controller_nr)
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{
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if ((mmc_controller->slots[0].switch_pin > 0) && \
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(mmc_controller->slots[0].switch_pin < OMAP_MAX_GPIO_LINES))
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omap_mux_init_gpio(mmc_controller->slots[0].switch_pin,
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OMAP_PIN_INPUT_PULLUP);
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if ((mmc_controller->slots[0].gpio_wp > 0) && \
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(mmc_controller->slots[0].gpio_wp < OMAP_MAX_GPIO_LINES))
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omap_mux_init_gpio(mmc_controller->slots[0].gpio_wp,
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OMAP_PIN_INPUT_PULLUP);
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if (cpu_is_omap34xx()) {
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if (controller_nr == 0) {
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omap_mux_init_signal("sdmmc1_clk",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("sdmmc1_cmd",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("sdmmc1_dat0",
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OMAP_PIN_INPUT_PULLUP);
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if (mmc_controller->slots[0].caps &
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(MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)) {
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omap_mux_init_signal("sdmmc1_dat1",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("sdmmc1_dat2",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("sdmmc1_dat3",
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OMAP_PIN_INPUT_PULLUP);
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}
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if (mmc_controller->slots[0].caps &
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MMC_CAP_8_BIT_DATA) {
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omap_mux_init_signal("sdmmc1_dat4",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("sdmmc1_dat5",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("sdmmc1_dat6",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("sdmmc1_dat7",
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OMAP_PIN_INPUT_PULLUP);
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}
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}
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if (controller_nr == 1) {
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/* MMC2 */
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omap_mux_init_signal("sdmmc2_clk",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("sdmmc2_cmd",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("sdmmc2_dat0",
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OMAP_PIN_INPUT_PULLUP);
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/*
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* For 8 wire configurations, Lines DAT4, 5, 6 and 7
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* need to be muxed in the board-*.c files
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*/
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if (mmc_controller->slots[0].caps &
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(MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)) {
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omap_mux_init_signal("sdmmc2_dat1",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("sdmmc2_dat2",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("sdmmc2_dat3",
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OMAP_PIN_INPUT_PULLUP);
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}
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if (mmc_controller->slots[0].caps &
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MMC_CAP_8_BIT_DATA) {
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omap_mux_init_signal("sdmmc2_dat4.sdmmc2_dat4",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("sdmmc2_dat5.sdmmc2_dat5",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("sdmmc2_dat6.sdmmc2_dat6",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("sdmmc2_dat7.sdmmc2_dat7",
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OMAP_PIN_INPUT_PULLUP);
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}
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}
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/*
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* For MMC3 the pins need to be muxed in the board-*.c files
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*/
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}
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}
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static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
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struct omap_mmc_platform_data *mmc)
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{
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char *hc_name;
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hc_name = kzalloc(sizeof(char) * (HSMMC_NAME_LEN + 1), GFP_KERNEL);
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if (!hc_name) {
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pr_err("Cannot allocate memory for controller slot name\n");
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kfree(hc_name);
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return -ENOMEM;
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}
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if (c->name)
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strncpy(hc_name, c->name, HSMMC_NAME_LEN);
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else
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snprintf(hc_name, (HSMMC_NAME_LEN + 1), "mmc%islot%i",
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c->mmc, 1);
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mmc->slots[0].name = hc_name;
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mmc->nr_slots = 1;
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mmc->slots[0].caps = c->caps;
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mmc->slots[0].internal_clock = !c->ext_clock;
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mmc->dma_mask = 0xffffffff;
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if (cpu_is_omap44xx())
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mmc->reg_offset = OMAP4_MMC_REG_OFFSET;
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else
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mmc->reg_offset = 0;
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mmc->get_context_loss_count = hsmmc_get_context_loss;
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mmc->slots[0].switch_pin = c->gpio_cd;
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mmc->slots[0].gpio_wp = c->gpio_wp;
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mmc->slots[0].remux = c->remux;
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mmc->slots[0].init_card = c->init_card;
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if (c->cover_only)
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mmc->slots[0].cover = 1;
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if (c->nonremovable)
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mmc->slots[0].nonremovable = 1;
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if (c->power_saving)
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mmc->slots[0].power_saving = 1;
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if (c->no_off)
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mmc->slots[0].no_off = 1;
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if (c->no_off_init)
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mmc->slots[0].no_regulator_off_init = c->no_off_init;
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if (c->vcc_aux_disable_is_sleep)
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mmc->slots[0].vcc_aux_disable_is_sleep = 1;
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/*
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* NOTE: MMC slots should have a Vcc regulator set up.
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* This may be from a TWL4030-family chip, another
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* controllable regulator, or a fixed supply.
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*
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* temporary HACK: ocr_mask instead of fixed supply
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*/
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mmc->slots[0].ocr_mask = c->ocr_mask;
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if (cpu_is_omap3517() || cpu_is_omap3505())
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mmc->slots[0].set_power = nop_mmc_set_power;
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else
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mmc->slots[0].features |= HSMMC_HAS_PBIAS;
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if (cpu_is_omap44xx() && (omap_rev() > OMAP4430_REV_ES1_0))
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mmc->slots[0].features |= HSMMC_HAS_UPDATED_RESET;
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switch (c->mmc) {
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case 1:
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if (mmc->slots[0].features & HSMMC_HAS_PBIAS) {
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/* on-chip level shifting via PBIAS0/PBIAS1 */
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if (cpu_is_omap44xx()) {
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mmc->slots[0].before_set_reg =
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omap4_hsmmc1_before_set_reg;
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mmc->slots[0].after_set_reg =
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omap4_hsmmc1_after_set_reg;
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} else {
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mmc->slots[0].before_set_reg =
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omap_hsmmc1_before_set_reg;
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mmc->slots[0].after_set_reg =
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omap_hsmmc1_after_set_reg;
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}
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}
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/* OMAP3630 HSMMC1 supports only 4-bit */
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if (cpu_is_omap3630() &&
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(c->caps & MMC_CAP_8_BIT_DATA)) {
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c->caps &= ~MMC_CAP_8_BIT_DATA;
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c->caps |= MMC_CAP_4_BIT_DATA;
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mmc->slots[0].caps = c->caps;
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}
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break;
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case 2:
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if (c->ext_clock)
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c->transceiver = 1;
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if (c->transceiver && (c->caps & MMC_CAP_8_BIT_DATA)) {
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c->caps &= ~MMC_CAP_8_BIT_DATA;
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c->caps |= MMC_CAP_4_BIT_DATA;
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}
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/* FALLTHROUGH */
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case 3:
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if (mmc->slots[0].features & HSMMC_HAS_PBIAS) {
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/* off-chip level shifting, or none */
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mmc->slots[0].before_set_reg = hsmmc23_before_set_reg;
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mmc->slots[0].after_set_reg = NULL;
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}
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break;
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case 4:
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case 5:
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mmc->slots[0].before_set_reg = NULL;
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mmc->slots[0].after_set_reg = NULL;
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break;
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default:
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pr_err("MMC%d configuration not supported!\n", c->mmc);
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kfree(hc_name);
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return -ENODEV;
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}
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return 0;
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}
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static struct omap_device_pm_latency omap_hsmmc_latency[] = {
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[0] = {
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.deactivate_func = omap_device_idle_hwmods,
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.activate_func = omap_device_enable_hwmods,
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.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
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},
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/*
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* XXX There should also be an entry here to power off/on the
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* MMC regulators/PBIAS cells, etc.
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*/
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};
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#define MAX_OMAP_MMC_HWMOD_NAME_LEN 16
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void __init omap_init_hsmmc(struct omap2_hsmmc_info *hsmmcinfo, int ctrl_nr)
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{
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struct omap_hwmod *oh;
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struct omap_device *od;
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struct omap_device_pm_latency *ohl;
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char oh_name[MAX_OMAP_MMC_HWMOD_NAME_LEN];
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struct omap_mmc_platform_data *mmc_data;
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struct omap_mmc_dev_attr *mmc_dev_attr;
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char *name;
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int l;
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int ohl_cnt = 0;
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mmc_data = kzalloc(sizeof(struct omap_mmc_platform_data), GFP_KERNEL);
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if (!mmc_data) {
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pr_err("Cannot allocate memory for mmc device!\n");
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goto done;
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}
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|
|
if (omap_hsmmc_pdata_init(hsmmcinfo, mmc_data) < 0) {
|
|
pr_err("%s fails!\n", __func__);
|
|
goto done;
|
|
}
|
|
omap_hsmmc_mux(mmc_data, (ctrl_nr - 1));
|
|
|
|
name = "omap_hsmmc";
|
|
ohl = omap_hsmmc_latency;
|
|
ohl_cnt = ARRAY_SIZE(omap_hsmmc_latency);
|
|
|
|
l = snprintf(oh_name, MAX_OMAP_MMC_HWMOD_NAME_LEN,
|
|
"mmc%d", ctrl_nr);
|
|
WARN(l >= MAX_OMAP_MMC_HWMOD_NAME_LEN,
|
|
"String buffer overflow in MMC%d device setup\n", ctrl_nr);
|
|
oh = omap_hwmod_lookup(oh_name);
|
|
if (!oh) {
|
|
pr_err("Could not look up %s\n", oh_name);
|
|
kfree(mmc_data->slots[0].name);
|
|
goto done;
|
|
}
|
|
|
|
if (oh->dev_attr != NULL) {
|
|
mmc_dev_attr = oh->dev_attr;
|
|
mmc_data->controller_flags = mmc_dev_attr->flags;
|
|
}
|
|
|
|
od = omap_device_build(name, ctrl_nr - 1, oh, mmc_data,
|
|
sizeof(struct omap_mmc_platform_data), ohl, ohl_cnt, false);
|
|
if (IS_ERR(od)) {
|
|
WARN(1, "Can't build omap_device for %s:%s.\n", name, oh->name);
|
|
kfree(mmc_data->slots[0].name);
|
|
goto done;
|
|
}
|
|
/*
|
|
* return device handle to board setup code
|
|
* required to populate for regulator framework structure
|
|
*/
|
|
hsmmcinfo->dev = &od->pdev.dev;
|
|
|
|
done:
|
|
kfree(mmc_data);
|
|
}
|
|
|
|
void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers)
|
|
{
|
|
u32 reg;
|
|
|
|
if (!cpu_is_omap44xx()) {
|
|
if (cpu_is_omap2430()) {
|
|
control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE;
|
|
control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1;
|
|
} else {
|
|
control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE;
|
|
control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1;
|
|
}
|
|
} else {
|
|
control_pbias_offset =
|
|
OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_PBIASLITE;
|
|
control_mmc1 = OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_MMC1;
|
|
reg = omap4_ctrl_pad_readl(control_mmc1);
|
|
reg |= (OMAP4_SDMMC1_PUSTRENGTH_GRP0_MASK |
|
|
OMAP4_SDMMC1_PUSTRENGTH_GRP1_MASK);
|
|
reg &= ~(OMAP4_SDMMC1_PUSTRENGTH_GRP2_MASK |
|
|
OMAP4_SDMMC1_PUSTRENGTH_GRP3_MASK);
|
|
reg |= (OMAP4_USBC1_DR0_SPEEDCTRL_MASK|
|
|
OMAP4_SDMMC1_DR1_SPEEDCTRL_MASK |
|
|
OMAP4_SDMMC1_DR2_SPEEDCTRL_MASK);
|
|
omap4_ctrl_pad_writel(reg, control_mmc1);
|
|
}
|
|
|
|
for (; controllers->mmc; controllers++)
|
|
omap_init_hsmmc(controllers, controllers->mmc);
|
|
|
|
}
|
|
|
|
#endif
|