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505 lines
12 KiB
505 lines
12 KiB
/*
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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 <linux/gpio.h>
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#include <linux/mmc/host.h>
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#include <linux/platform_data/gpio-omap.h>
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#include <linux/platform_data/hsmmc-omap.h>
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#include "soc.h"
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#include "omap_device.h"
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#include "omap-pm.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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#define HSMMC_NAME_LEN 9
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static void omap_hsmmc1_before_set_reg(struct device *dev,
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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_hsmmc_platform_data *mmc = dev->platform_data;
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if (mmc->remux)
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mmc->remux(dev, 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->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 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 hsmmc2_select_input_clk_src(struct omap_hsmmc_platform_data *mmc)
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{
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u32 reg;
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reg = omap_ctrl_readl(control_devconf1_offset);
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if (mmc->internal_clock)
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reg |= OMAP2_MMCSDIO2ADPCLKISEL;
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else
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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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static void hsmmc2_before_set_reg(struct device *dev, int power_on, int vdd)
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{
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struct omap_hsmmc_platform_data *mmc = dev->platform_data;
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if (mmc->remux)
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mmc->remux(dev, power_on);
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if (power_on)
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hsmmc2_select_input_clk_src(mmc);
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}
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static int am35x_hsmmc2_set_power(struct device *dev, int power_on, int vdd)
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{
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struct omap_hsmmc_platform_data *mmc = dev->platform_data;
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if (power_on)
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hsmmc2_select_input_clk_src(mmc);
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return 0;
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}
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static int nop_mmc_set_power(struct device *dev, int power_on, 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_hsmmc_platform_data
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*mmc_controller, int controller_nr)
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{
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if (gpio_is_valid(mmc_controller->gpio_cd) &&
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(mmc_controller->gpio_cd < OMAP_MAX_GPIO_LINES))
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omap_mux_init_gpio(mmc_controller->gpio_cd,
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OMAP_PIN_INPUT_PULLUP);
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if (gpio_is_valid(mmc_controller->gpio_cod) &&
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(mmc_controller->gpio_cod < OMAP_MAX_GPIO_LINES))
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omap_mux_init_gpio(mmc_controller->gpio_cod,
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OMAP_PIN_INPUT_PULLUP);
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if (gpio_is_valid(mmc_controller->gpio_wp) &&
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(mmc_controller->gpio_wp < OMAP_MAX_GPIO_LINES))
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omap_mux_init_gpio(mmc_controller->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->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->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->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->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_hsmmc_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->name = hc_name;
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mmc->caps = c->caps;
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mmc->internal_clock = !c->ext_clock;
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mmc->reg_offset = 0;
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if (c->cover_only) {
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/* detect if mobile phone cover removed */
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mmc->gpio_cd = -EINVAL;
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mmc->gpio_cod = c->gpio_cd;
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} else {
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/* card detect pin on the mmc socket itself */
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mmc->gpio_cd = c->gpio_cd;
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mmc->gpio_cod = -EINVAL;
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}
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mmc->gpio_wp = c->gpio_wp;
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mmc->remux = c->remux;
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mmc->init_card = c->init_card;
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if (c->nonremovable)
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mmc->nonremovable = 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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if (soc_is_am35xx())
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mmc->ocr_mask = MMC_VDD_165_195 |
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MMC_VDD_26_27 |
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MMC_VDD_27_28 |
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MMC_VDD_29_30 |
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MMC_VDD_30_31 |
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MMC_VDD_31_32;
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else
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mmc->ocr_mask = c->ocr_mask;
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if (!soc_is_am35xx())
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mmc->features |= HSMMC_HAS_PBIAS;
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switch (c->mmc) {
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case 1:
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if (mmc->features & HSMMC_HAS_PBIAS) {
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/* on-chip level shifting via PBIAS0/PBIAS1 */
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mmc->before_set_reg =
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omap_hsmmc1_before_set_reg;
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mmc->after_set_reg =
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omap_hsmmc1_after_set_reg;
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}
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if (soc_is_am35xx())
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mmc->set_power = nop_mmc_set_power;
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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->caps = c->caps;
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}
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break;
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case 2:
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if (soc_is_am35xx())
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mmc->set_power = am35x_hsmmc2_set_power;
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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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if (mmc->features & HSMMC_HAS_PBIAS) {
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/* off-chip level shifting, or none */
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mmc->before_set_reg = hsmmc2_before_set_reg;
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mmc->after_set_reg = NULL;
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}
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break;
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case 3:
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case 4:
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case 5:
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mmc->before_set_reg = NULL;
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mmc->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 int omap_hsmmc_done;
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void omap_hsmmc_late_init(struct omap2_hsmmc_info *c)
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{
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struct platform_device *pdev;
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struct omap_hsmmc_platform_data *mmc_pdata;
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int res;
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if (omap_hsmmc_done != 1)
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return;
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omap_hsmmc_done++;
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for (; c->mmc; c++) {
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if (!c->deferred)
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continue;
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pdev = c->pdev;
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if (!pdev)
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continue;
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mmc_pdata = pdev->dev.platform_data;
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if (!mmc_pdata)
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continue;
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if (c->cover_only) {
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/* detect if mobile phone cover removed */
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mmc_pdata->gpio_cd = -EINVAL;
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mmc_pdata->gpio_cod = c->gpio_cd;
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} else {
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/* card detect pin on the mmc socket itself */
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mmc_pdata->gpio_cd = c->gpio_cd;
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mmc_pdata->gpio_cod = -EINVAL;
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}
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mmc_pdata->gpio_wp = c->gpio_wp;
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res = omap_device_register(pdev);
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if (res)
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pr_err("Could not late init MMC %s\n",
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c->name);
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}
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}
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#define MAX_OMAP_MMC_HWMOD_NAME_LEN 16
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static void __init omap_hsmmc_init_one(struct omap2_hsmmc_info *hsmmcinfo,
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int ctrl_nr)
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{
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struct omap_hwmod *oh;
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struct omap_hwmod *ohs[1];
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struct omap_device *od;
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struct platform_device *pdev;
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char oh_name[MAX_OMAP_MMC_HWMOD_NAME_LEN];
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struct omap_hsmmc_platform_data *mmc_data;
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struct omap_hsmmc_dev_attr *mmc_dev_attr;
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char *name;
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int res;
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mmc_data = kzalloc(sizeof(*mmc_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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return;
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}
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res = omap_hsmmc_pdata_init(hsmmcinfo, mmc_data);
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if (res < 0)
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goto free_mmc;
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omap_hsmmc_mux(mmc_data, (ctrl_nr - 1));
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name = "omap_hsmmc";
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res = snprintf(oh_name, MAX_OMAP_MMC_HWMOD_NAME_LEN,
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"mmc%d", ctrl_nr);
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WARN(res >= MAX_OMAP_MMC_HWMOD_NAME_LEN,
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"String buffer overflow in MMC%d device setup\n", ctrl_nr);
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oh = omap_hwmod_lookup(oh_name);
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if (!oh) {
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pr_err("Could not look up %s\n", oh_name);
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goto free_name;
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}
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ohs[0] = oh;
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if (oh->dev_attr != NULL) {
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mmc_dev_attr = oh->dev_attr;
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mmc_data->controller_flags = mmc_dev_attr->flags;
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/*
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* erratum 2.1.1.128 doesn't apply if board has
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* a transceiver is attached
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*/
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if (hsmmcinfo->transceiver)
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mmc_data->controller_flags &=
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~OMAP_HSMMC_BROKEN_MULTIBLOCK_READ;
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}
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pdev = platform_device_alloc(name, ctrl_nr - 1);
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if (!pdev) {
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pr_err("Could not allocate pdev for %s\n", name);
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goto free_name;
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}
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dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
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od = omap_device_alloc(pdev, ohs, 1);
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if (IS_ERR(od)) {
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pr_err("Could not allocate od for %s\n", name);
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goto put_pdev;
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}
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res = platform_device_add_data(pdev, mmc_data,
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sizeof(struct omap_hsmmc_platform_data));
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if (res) {
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pr_err("Could not add pdata for %s\n", name);
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goto put_pdev;
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}
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hsmmcinfo->pdev = pdev;
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if (hsmmcinfo->deferred)
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goto free_mmc;
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res = omap_device_register(pdev);
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if (res) {
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pr_err("Could not register od for %s\n", name);
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goto free_od;
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}
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goto free_mmc;
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free_od:
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omap_device_delete(od);
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put_pdev:
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platform_device_put(pdev);
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free_name:
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kfree(mmc_data->name);
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free_mmc:
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kfree(mmc_data);
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}
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void __init omap_hsmmc_init(struct omap2_hsmmc_info *controllers)
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{
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if (omap_hsmmc_done)
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return;
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omap_hsmmc_done = 1;
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if (cpu_is_omap2430()) {
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control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE;
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control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1;
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} else {
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|
control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE;
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control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1;
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}
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|
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for (; controllers->mmc; controllers++)
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omap_hsmmc_init_one(controllers, controllers->mmc);
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}
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#endif
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