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dcf5ef3f42
linux_dsm_epyc7002/arch/arm/mach-omap2/hsmmc.c
Santosh Shilimkar dcf5ef3f42 omap4: control: Fix the control module register accesses 
This patch has multiple fixes together. To ensure that git bisect work across
commits, all changes are clubbed together

1. Move the common control base address to control core
2. Remove the manually coeded defines and use the ones from headers.
3. Fix the the status register define in id.c for OMAP4
4. Fix all the register define in hsmmc.c
5. Use the control pad accessor API for omap4 hsmmc register accesses

Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2010-09-27 14:02:58 -06:00

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9.8 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 <mach/hardware.h>
#include <plat/control.h>
#include <plat/mmc.h>
#include <plat/omap-pm.h>
#include "hsmmc.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
static struct hsmmc_controller {
char name[HSMMC_NAME_LEN + 1];
} hsmmc[OMAP34XX_NR_MMC];
#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;
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);
/* 4 microsec delay for comparator to generate an error*/
udelay(4);
reg = omap4_ctrl_pad_readl(control_pbias_offset);
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 struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata;
void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers)
{
struct omap2_hsmmc_info *c;
int nr_hsmmc = ARRAY_SIZE(hsmmc_data);
int i;
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 (c = controllers; c->mmc; c++) {
struct hsmmc_controller *hc = 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");
goto done;
}
if (c->name)
strncpy(hc->name, c->name, HSMMC_NAME_LEN);
else
snprintf(hc->name, ARRAY_SIZE(hc->name),
"mmc%islot%i", c->mmc, 1);
mmc->slots[0].name = hc->name;
mmc->nr_slots = 1;
mmc->slots[0].wires = c->wires;
mmc->slots[0].internal_clock = !c->ext_clock;
mmc->dma_mask = 0xffffffff;
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->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;
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->wires > 4) {
c->wires = 4;
mmc->slots[0].wires = c->wires;
}
break;
case 2:
if (c->ext_clock)
c->transceiver = 1;
if (c->transceiver && c->wires > 4)
c->wires = 4;
/* 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;
default:
pr_err("MMC%d configuration not supported!\n", c->mmc);
kfree(mmc);
continue;
}
hsmmc_data[c->mmc - 1] = mmc;
}
omap2_init_mmc(hsmmc_data, OMAP34XX_NR_MMC);
/* pass the device nodes back to board setup code */
for (c = controllers; c->mmc; c++) {
struct omap_mmc_platform_data *mmc = hsmmc_data[c->mmc - 1];
if (!c->mmc || c->mmc > nr_hsmmc)
continue;
c->dev = mmc->dev;
}
done:
for (i = 0; i < nr_hsmmc; i++)
kfree(hsmmc_data[i]);
}
#endif
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