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linux/arch/arm/mach-omap2/hsmmc.c
Silesh C V 5e4698fc44 omap: HSMMC: Fix GPIO muxing 
Use generic gpio call to check the validity of the gpio. Note that
this includes gpio 0 also which was missing before.

Signed-off-by: Silesh C V <silesh@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2011-07-04 04:11:08 -07:00

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