u-boot/drivers/mmc/omap_hsmmc.c

1961 lines
48 KiB
C
Raw Normal View History

/*
* (C) Copyright 2008
* Texas Instruments, <www.ti.com>
* Sukumar Ghorai <s-ghorai@ti.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation's version 2 of
* the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <config.h>
#include <common.h>
#include <malloc.h>
#include <memalign.h>
#include <mmc.h>
#include <part.h>
#include <i2c.h>
#if defined(CONFIG_OMAP54XX) || defined(CONFIG_OMAP44XX)
#include <palmas.h>
#endif
#include <asm/io.h>
#include <asm/arch/mmc_host_def.h>
#ifdef CONFIG_OMAP54XX
#include <asm/arch/mux_dra7xx.h>
#include <asm/arch/dra7xx_iodelay.h>
#endif
#if !defined(CONFIG_SOC_KEYSTONE)
#include <asm/gpio.h>
#include <asm/arch/sys_proto.h>
#endif
#ifdef CONFIG_MMC_OMAP36XX_PINS
#include <asm/arch/mux.h>
#endif
#include <dm.h>
#include <power/regulator.h>
DECLARE_GLOBAL_DATA_PTR;
/* simplify defines to OMAP_HSMMC_USE_GPIO */
#if (defined(CONFIG_OMAP_GPIO) && !defined(CONFIG_SPL_BUILD)) || \
(defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_GPIO_SUPPORT))
#define OMAP_HSMMC_USE_GPIO
#else
#undef OMAP_HSMMC_USE_GPIO
#endif
/* common definitions for all OMAPs */
#define SYSCTL_SRC (1 << 25)
#define SYSCTL_SRD (1 << 26)
#ifdef CONFIG_IODELAY_RECALIBRATION
struct omap_hsmmc_pinctrl_state {
struct pad_conf_entry *padconf;
int npads;
struct iodelay_cfg_entry *iodelay;
int niodelays;
};
#endif
struct omap_hsmmc_data {
struct hsmmc *base_addr;
#if !CONFIG_IS_ENABLED(DM_MMC)
struct mmc_config cfg;
#endif
uint bus_width;
uint clock;
ushort last_cmd;
#ifdef OMAP_HSMMC_USE_GPIO
#if CONFIG_IS_ENABLED(DM_MMC)
struct gpio_desc cd_gpio; /* Change Detect GPIO */
struct gpio_desc wp_gpio; /* Write Protect GPIO */
bool cd_inverted;
#else
int cd_gpio;
int wp_gpio;
#endif
#endif
#if CONFIG_IS_ENABLED(DM_MMC)
enum bus_mode mode;
#endif
u8 controller_flags;
#ifdef CONFIG_MMC_OMAP_HS_ADMA
struct omap_hsmmc_adma_desc *adma_desc_table;
uint desc_slot;
#endif
const char *hw_rev;
struct udevice *pbias_supply;
uint signal_voltage;
#ifdef CONFIG_IODELAY_RECALIBRATION
struct omap_hsmmc_pinctrl_state *default_pinctrl_state;
struct omap_hsmmc_pinctrl_state *hs_pinctrl_state;
struct omap_hsmmc_pinctrl_state *hs200_1_8v_pinctrl_state;
struct omap_hsmmc_pinctrl_state *ddr_1_8v_pinctrl_state;
struct omap_hsmmc_pinctrl_state *sdr12_pinctrl_state;
struct omap_hsmmc_pinctrl_state *sdr25_pinctrl_state;
struct omap_hsmmc_pinctrl_state *ddr50_pinctrl_state;
struct omap_hsmmc_pinctrl_state *sdr50_pinctrl_state;
struct omap_hsmmc_pinctrl_state *sdr104_pinctrl_state;
#endif
};
struct omap_mmc_of_data {
u8 controller_flags;
};
#ifdef CONFIG_MMC_OMAP_HS_ADMA
struct omap_hsmmc_adma_desc {
u8 attr;
u8 reserved;
u16 len;
u32 addr;
};
#define ADMA_MAX_LEN 63488
/* Decriptor table defines */
#define ADMA_DESC_ATTR_VALID BIT(0)
#define ADMA_DESC_ATTR_END BIT(1)
#define ADMA_DESC_ATTR_INT BIT(2)
#define ADMA_DESC_ATTR_ACT1 BIT(4)
#define ADMA_DESC_ATTR_ACT2 BIT(5)
#define ADMA_DESC_TRANSFER_DATA ADMA_DESC_ATTR_ACT2
#define ADMA_DESC_LINK_DESC (ADMA_DESC_ATTR_ACT1 | ADMA_DESC_ATTR_ACT2)
#endif
/* If we fail after 1 second wait, something is really bad */
#define MAX_RETRY_MS 1000
#define MMC_TIMEOUT_MS 20
/* DMA transfers can take a long time if a lot a data is transferred.
* The timeout must take in account the amount of data. Let's assume
* that the time will never exceed 333 ms per MB (in other word we assume
* that the bandwidth is always above 3MB/s).
*/
#define DMA_TIMEOUT_PER_MB 333
#define OMAP_HSMMC_SUPPORTS_DUAL_VOLT BIT(0)
#define OMAP_HSMMC_NO_1_8_V BIT(1)
#define OMAP_HSMMC_USE_ADMA BIT(2)
#define OMAP_HSMMC_REQUIRE_IODELAY BIT(3)
static int mmc_read_data(struct hsmmc *mmc_base, char *buf, unsigned int size);
static int mmc_write_data(struct hsmmc *mmc_base, const char *buf,
unsigned int siz);
static void omap_hsmmc_start_clock(struct hsmmc *mmc_base);
static void omap_hsmmc_stop_clock(struct hsmmc *mmc_base);
static void mmc_reset_controller_fsm(struct hsmmc *mmc_base, u32 bit);
static inline struct omap_hsmmc_data *omap_hsmmc_get_data(struct mmc *mmc)
{
#if CONFIG_IS_ENABLED(DM_MMC)
return dev_get_priv(mmc->dev);
#else
return (struct omap_hsmmc_data *)mmc->priv;
#endif
}
static inline struct mmc_config *omap_hsmmc_get_cfg(struct mmc *mmc)
{
#if CONFIG_IS_ENABLED(DM_MMC)
struct omap_hsmmc_plat *plat = dev_get_platdata(mmc->dev);
return &plat->cfg;
#else
return &((struct omap_hsmmc_data *)mmc->priv)->cfg;
#endif
}
#if defined(OMAP_HSMMC_USE_GPIO) && !CONFIG_IS_ENABLED(DM_MMC)
static int omap_mmc_setup_gpio_in(int gpio, const char *label)
{
int ret;
#ifndef CONFIG_DM_GPIO
if (!gpio_is_valid(gpio))
return -1;
#endif
ret = gpio_request(gpio, label);
if (ret)
return ret;
ret = gpio_direction_input(gpio);
if (ret)
return ret;
return gpio;
}
#endif
static unsigned char mmc_board_init(struct mmc *mmc)
{
#if defined(CONFIG_OMAP34XX)
struct mmc_config *cfg = omap_hsmmc_get_cfg(mmc);
t2_t *t2_base = (t2_t *)T2_BASE;
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
u32 pbias_lite;
#ifdef CONFIG_MMC_OMAP36XX_PINS
u32 wkup_ctrl = readl(OMAP34XX_CTRL_WKUP_CTRL);
#endif
pbias_lite = readl(&t2_base->pbias_lite);
pbias_lite &= ~(PBIASLITEPWRDNZ1 | PBIASLITEPWRDNZ0);
#ifdef CONFIG_TARGET_OMAP3_CAIRO
/* for cairo board, we need to set up 1.8 Volt bias level on MMC1 */
pbias_lite &= ~PBIASLITEVMODE0;
#endif
#ifdef CONFIG_MMC_OMAP36XX_PINS
if (get_cpu_family() == CPU_OMAP36XX) {
/* Disable extended drain IO before changing PBIAS */
wkup_ctrl &= ~OMAP34XX_CTRL_WKUP_CTRL_GPIO_IO_PWRDNZ;
writel(wkup_ctrl, OMAP34XX_CTRL_WKUP_CTRL);
}
#endif
writel(pbias_lite, &t2_base->pbias_lite);
writel(pbias_lite | PBIASLITEPWRDNZ1 |
PBIASSPEEDCTRL0 | PBIASLITEPWRDNZ0,
&t2_base->pbias_lite);
#ifdef CONFIG_MMC_OMAP36XX_PINS
if (get_cpu_family() == CPU_OMAP36XX)
/* Enable extended drain IO after changing PBIAS */
writel(wkup_ctrl |
OMAP34XX_CTRL_WKUP_CTRL_GPIO_IO_PWRDNZ,
OMAP34XX_CTRL_WKUP_CTRL);
#endif
writel(readl(&t2_base->devconf0) | MMCSDIO1ADPCLKISEL,
&t2_base->devconf0);
writel(readl(&t2_base->devconf1) | MMCSDIO2ADPCLKISEL,
&t2_base->devconf1);
/* Change from default of 52MHz to 26MHz if necessary */
if (!(cfg->host_caps & MMC_MODE_HS_52MHz))
writel(readl(&t2_base->ctl_prog_io1) & ~CTLPROGIO1SPEEDCTRL,
&t2_base->ctl_prog_io1);
writel(readl(&prcm_base->fclken1_core) |
EN_MMC1 | EN_MMC2 | EN_MMC3,
&prcm_base->fclken1_core);
writel(readl(&prcm_base->iclken1_core) |
EN_MMC1 | EN_MMC2 | EN_MMC3,
&prcm_base->iclken1_core);
#endif
#if (defined(CONFIG_OMAP54XX) || defined(CONFIG_OMAP44XX)) &&\
!CONFIG_IS_ENABLED(DM_REGULATOR)
/* PBIAS config needed for MMC1 only */
if (mmc_get_blk_desc(mmc)->devnum == 0)
vmmc_pbias_config(LDO_VOLT_3V0);
#endif
return 0;
}
void mmc_init_stream(struct hsmmc *mmc_base)
{
ulong start;
writel(readl(&mmc_base->con) | INIT_INITSTREAM, &mmc_base->con);
writel(MMC_CMD0, &mmc_base->cmd);
start = get_timer(0);
while (!(readl(&mmc_base->stat) & CC_MASK)) {
if (get_timer(0) - start > MAX_RETRY_MS) {
printf("%s: timedout waiting for cc!\n", __func__);
return;
}
}
writel(CC_MASK, &mmc_base->stat)
;
writel(MMC_CMD0, &mmc_base->cmd)
;
start = get_timer(0);
while (!(readl(&mmc_base->stat) & CC_MASK)) {
if (get_timer(0) - start > MAX_RETRY_MS) {
printf("%s: timedout waiting for cc2!\n", __func__);
return;
}
}
writel(readl(&mmc_base->con) & ~INIT_INITSTREAM, &mmc_base->con);
}
#if CONFIG_IS_ENABLED(DM_MMC)
#ifdef CONFIG_IODELAY_RECALIBRATION
static void omap_hsmmc_io_recalibrate(struct mmc *mmc)
{
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
struct omap_hsmmc_pinctrl_state *pinctrl_state;
switch (priv->mode) {
case MMC_HS_200:
pinctrl_state = priv->hs200_1_8v_pinctrl_state;
break;
case UHS_SDR104:
pinctrl_state = priv->sdr104_pinctrl_state;
break;
case UHS_SDR50:
pinctrl_state = priv->sdr50_pinctrl_state;
break;
case UHS_DDR50:
pinctrl_state = priv->ddr50_pinctrl_state;
break;
case UHS_SDR25:
pinctrl_state = priv->sdr25_pinctrl_state;
break;
case UHS_SDR12:
pinctrl_state = priv->sdr12_pinctrl_state;
break;
case SD_HS:
case MMC_HS:
case MMC_HS_52:
pinctrl_state = priv->hs_pinctrl_state;
break;
case MMC_DDR_52:
pinctrl_state = priv->ddr_1_8v_pinctrl_state;
default:
pinctrl_state = priv->default_pinctrl_state;
break;
}
if (!pinctrl_state)
pinctrl_state = priv->default_pinctrl_state;
if (priv->controller_flags & OMAP_HSMMC_REQUIRE_IODELAY) {
if (pinctrl_state->iodelay)
late_recalibrate_iodelay(pinctrl_state->padconf,
pinctrl_state->npads,
pinctrl_state->iodelay,
pinctrl_state->niodelays);
else
do_set_mux32((*ctrl)->control_padconf_core_base,
pinctrl_state->padconf,
pinctrl_state->npads);
}
}
#endif
static void omap_hsmmc_set_timing(struct mmc *mmc)
{
u32 val;
struct hsmmc *mmc_base;
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
mmc_base = priv->base_addr;
omap_hsmmc_stop_clock(mmc_base);
val = readl(&mmc_base->ac12);
val &= ~AC12_UHSMC_MASK;
priv->mode = mmc->selected_mode;
if (mmc_is_mode_ddr(priv->mode))
writel(readl(&mmc_base->con) | DDR, &mmc_base->con);
else
writel(readl(&mmc_base->con) & ~DDR, &mmc_base->con);
switch (priv->mode) {
case MMC_HS_200:
case UHS_SDR104:
val |= AC12_UHSMC_SDR104;
break;
case UHS_SDR50:
val |= AC12_UHSMC_SDR50;
break;
case MMC_DDR_52:
case UHS_DDR50:
val |= AC12_UHSMC_DDR50;
break;
case SD_HS:
case MMC_HS_52:
case UHS_SDR25:
val |= AC12_UHSMC_SDR25;
break;
case MMC_LEGACY:
case MMC_HS:
case SD_LEGACY:
case UHS_SDR12:
val |= AC12_UHSMC_SDR12;
break;
default:
val |= AC12_UHSMC_RES;
break;
}
writel(val, &mmc_base->ac12);
#ifdef CONFIG_IODELAY_RECALIBRATION
omap_hsmmc_io_recalibrate(mmc);
#endif
omap_hsmmc_start_clock(mmc_base);
}
static void omap_hsmmc_conf_bus_power(struct mmc *mmc, uint signal_voltage)
{
struct hsmmc *mmc_base;
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
u32 hctl, ac12;
mmc_base = priv->base_addr;
hctl = readl(&mmc_base->hctl) & ~SDVS_MASK;
ac12 = readl(&mmc_base->ac12) & ~AC12_V1V8_SIGEN;
switch (signal_voltage) {
case MMC_SIGNAL_VOLTAGE_330:
hctl |= SDVS_3V0;
break;
case MMC_SIGNAL_VOLTAGE_180:
hctl |= SDVS_1V8;
ac12 |= AC12_V1V8_SIGEN;
break;
}
writel(hctl, &mmc_base->hctl);
writel(ac12, &mmc_base->ac12);
}
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
static int omap_hsmmc_wait_dat0(struct udevice *dev, int state, int timeout)
{
int ret = -ETIMEDOUT;
u32 con;
bool dat0_high;
bool target_dat0_high = !!state;
struct omap_hsmmc_data *priv = dev_get_priv(dev);
struct hsmmc *mmc_base = priv->base_addr;
con = readl(&mmc_base->con);
writel(con | CON_CLKEXTFREE | CON_PADEN, &mmc_base->con);
timeout = DIV_ROUND_UP(timeout, 10); /* check every 10 us. */
while (timeout--) {
dat0_high = !!(readl(&mmc_base->pstate) & PSTATE_DLEV_DAT0);
if (dat0_high == target_dat0_high) {
ret = 0;
break;
}
udelay(10);
}
writel(con, &mmc_base->con);
return ret;
}
#endif
#if CONFIG_IS_ENABLED(MMC_IO_VOLTAGE)
#if CONFIG_IS_ENABLED(DM_REGULATOR)
static int omap_hsmmc_set_io_regulator(struct mmc *mmc, int mV)
{
int ret = 0;
int uV = mV * 1000;
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
if (!mmc->vqmmc_supply)
return 0;
/* Disable PBIAS */
ret = regulator_set_enable(priv->pbias_supply, false);
if (ret && ret != -ENOSYS)
return ret;
/* Turn off IO voltage */
ret = regulator_set_enable(mmc->vqmmc_supply, false);
if (ret && ret != -ENOSYS)
return ret;
/* Program a new IO voltage value */
ret = regulator_set_value(mmc->vqmmc_supply, uV);
if (ret)
return ret;
/* Turn on IO voltage */
ret = regulator_set_enable(mmc->vqmmc_supply, true);
if (ret && ret != -ENOSYS)
return ret;
/* Program PBIAS voltage*/
ret = regulator_set_value(priv->pbias_supply, uV);
if (ret && ret != -ENOSYS)
return ret;
/* Enable PBIAS */
ret = regulator_set_enable(priv->pbias_supply, true);
if (ret && ret != -ENOSYS)
return ret;
return 0;
}
#endif
static int omap_hsmmc_set_signal_voltage(struct mmc *mmc)
{
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
struct hsmmc *mmc_base = priv->base_addr;
int mv = mmc_voltage_to_mv(mmc->signal_voltage);
u32 capa_mask;
__maybe_unused u8 palmas_ldo_volt;
u32 val;
if (mv < 0)
return -EINVAL;
if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
/* Use 3.0V rather than 3.3V */
mv = 3000;
capa_mask = VS30_3V0SUP;
palmas_ldo_volt = LDO_VOLT_3V0;
} else if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180) {
capa_mask = VS18_1V8SUP;
palmas_ldo_volt = LDO_VOLT_1V8;
} else {
return -EOPNOTSUPP;
}
val = readl(&mmc_base->capa);
if (!(val & capa_mask))
return -EOPNOTSUPP;
priv->signal_voltage = mmc->signal_voltage;
omap_hsmmc_conf_bus_power(mmc, mmc->signal_voltage);
#if CONFIG_IS_ENABLED(DM_REGULATOR)
return omap_hsmmc_set_io_regulator(mmc, mv);
#elif (defined(CONFIG_OMAP54XX) || defined(CONFIG_OMAP44XX)) && \
defined(CONFIG_PALMAS_POWER)
if (mmc_get_blk_desc(mmc)->devnum == 0)
vmmc_pbias_config(palmas_ldo_volt);
return 0;
#else
return 0;
#endif
}
#endif
static uint32_t omap_hsmmc_set_capabilities(struct mmc *mmc)
{
struct hsmmc *mmc_base;
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
u32 val;
mmc_base = priv->base_addr;
val = readl(&mmc_base->capa);
if (priv->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) {
val |= (VS30_3V0SUP | VS18_1V8SUP);
} else if (priv->controller_flags & OMAP_HSMMC_NO_1_8_V) {
val |= VS30_3V0SUP;
val &= ~VS18_1V8SUP;
} else {
val |= VS18_1V8SUP;
val &= ~VS30_3V0SUP;
}
writel(val, &mmc_base->capa);
return val;
}
#ifdef MMC_SUPPORTS_TUNING
static void omap_hsmmc_disable_tuning(struct mmc *mmc)
{
struct hsmmc *mmc_base;
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
u32 val;
mmc_base = priv->base_addr;
val = readl(&mmc_base->ac12);
val &= ~(AC12_SCLK_SEL);
writel(val, &mmc_base->ac12);
val = readl(&mmc_base->dll);
val &= ~(DLL_FORCE_VALUE | DLL_SWT);
writel(val, &mmc_base->dll);
}
static void omap_hsmmc_set_dll(struct mmc *mmc, int count)
{
int i;
struct hsmmc *mmc_base;
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
u32 val;
mmc_base = priv->base_addr;
val = readl(&mmc_base->dll);
val |= DLL_FORCE_VALUE;
val &= ~(DLL_FORCE_SR_C_MASK << DLL_FORCE_SR_C_SHIFT);
val |= (count << DLL_FORCE_SR_C_SHIFT);
writel(val, &mmc_base->dll);
val |= DLL_CALIB;
writel(val, &mmc_base->dll);
for (i = 0; i < 1000; i++) {
if (readl(&mmc_base->dll) & DLL_CALIB)
break;
}
val &= ~DLL_CALIB;
writel(val, &mmc_base->dll);
}
static int omap_hsmmc_execute_tuning(struct udevice *dev, uint opcode)
{
struct omap_hsmmc_data *priv = dev_get_priv(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct mmc *mmc = upriv->mmc;
struct hsmmc *mmc_base;
u32 val;
u8 cur_match, prev_match = 0;
int ret;
u32 phase_delay = 0;
u32 start_window = 0, max_window = 0;
u32 length = 0, max_len = 0;
mmc_base = priv->base_addr;
val = readl(&mmc_base->capa2);
/* clock tuning is not needed for upto 52MHz */
if (!((mmc->selected_mode == MMC_HS_200) ||
(mmc->selected_mode == UHS_SDR104) ||
((mmc->selected_mode == UHS_SDR50) && (val & CAPA2_TSDR50))))
return 0;
val = readl(&mmc_base->dll);
val |= DLL_SWT;
writel(val, &mmc_base->dll);
while (phase_delay <= MAX_PHASE_DELAY) {
omap_hsmmc_set_dll(mmc, phase_delay);
cur_match = !mmc_send_tuning(mmc, opcode, NULL);
if (cur_match) {
if (prev_match) {
length++;
} else {
start_window = phase_delay;
length = 1;
}
}
if (length > max_len) {
max_window = start_window;
max_len = length;
}
prev_match = cur_match;
phase_delay += 4;
}
if (!max_len) {
ret = -EIO;
goto tuning_error;
}
val = readl(&mmc_base->ac12);
if (!(val & AC12_SCLK_SEL)) {
ret = -EIO;
goto tuning_error;
}
phase_delay = max_window + 4 * ((3 * max_len) >> 2);
omap_hsmmc_set_dll(mmc, phase_delay);
mmc_reset_controller_fsm(mmc_base, SYSCTL_SRD);
mmc_reset_controller_fsm(mmc_base, SYSCTL_SRC);
return 0;
tuning_error:
omap_hsmmc_disable_tuning(mmc);
mmc_reset_controller_fsm(mmc_base, SYSCTL_SRD);
mmc_reset_controller_fsm(mmc_base, SYSCTL_SRC);
return ret;
}
#endif
static void omap_hsmmc_send_init_stream(struct udevice *dev)
{
struct omap_hsmmc_data *priv = dev_get_priv(dev);
struct hsmmc *mmc_base = priv->base_addr;
mmc_init_stream(mmc_base);
}
#endif
static void mmc_enable_irq(struct mmc *mmc, struct mmc_cmd *cmd)
{
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
struct hsmmc *mmc_base = priv->base_addr;
u32 irq_mask = INT_EN_MASK;
/*
* TODO: Errata i802 indicates only DCRC interrupts can occur during
* tuning procedure and DCRC should be disabled. But see occurences
* of DEB, CIE, CEB, CCRC interupts during tuning procedure. These
* interrupts occur along with BRR, so the data is actually in the
* buffer. It has to be debugged why these interrutps occur
*/
if (cmd && mmc_is_tuning_cmd(cmd->cmdidx))
irq_mask &= ~(IE_DEB | IE_DCRC | IE_CIE | IE_CEB | IE_CCRC);
writel(irq_mask, &mmc_base->ie);
}
static int omap_hsmmc_init_setup(struct mmc *mmc)
{
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
struct hsmmc *mmc_base;
unsigned int reg_val;
unsigned int dsor;
ulong start;
mmc_base = priv->base_addr;
mmc_board_init(mmc);
writel(readl(&mmc_base->sysconfig) | MMC_SOFTRESET,
&mmc_base->sysconfig);
start = get_timer(0);
while ((readl(&mmc_base->sysstatus) & RESETDONE) == 0) {
if (get_timer(0) - start > MAX_RETRY_MS) {
printf("%s: timedout waiting for cc2!\n", __func__);
return -ETIMEDOUT;
}
}
writel(readl(&mmc_base->sysctl) | SOFTRESETALL, &mmc_base->sysctl);
start = get_timer(0);
while ((readl(&mmc_base->sysctl) & SOFTRESETALL) != 0x0) {
if (get_timer(0) - start > MAX_RETRY_MS) {
printf("%s: timedout waiting for softresetall!\n",
__func__);
return -ETIMEDOUT;
}
}
#ifdef CONFIG_MMC_OMAP_HS_ADMA
reg_val = readl(&mmc_base->hl_hwinfo);
if (reg_val & MADMA_EN)
priv->controller_flags |= OMAP_HSMMC_USE_ADMA;
#endif
#if CONFIG_IS_ENABLED(DM_MMC)
reg_val = omap_hsmmc_set_capabilities(mmc);
omap_hsmmc_conf_bus_power(mmc, (reg_val & VS30_3V0SUP) ?
MMC_SIGNAL_VOLTAGE_330 : MMC_SIGNAL_VOLTAGE_180);
#else
writel(DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0, &mmc_base->hctl);
writel(readl(&mmc_base->capa) | VS30_3V0SUP | VS18_1V8SUP,
&mmc_base->capa);
#endif
reg_val = readl(&mmc_base->con) & RESERVED_MASK;
writel(CTPL_MMC_SD | reg_val | WPP_ACTIVEHIGH | CDP_ACTIVEHIGH |
MIT_CTO | DW8_1_4BITMODE | MODE_FUNC | STR_BLOCK |
HR_NOHOSTRESP | INIT_NOINIT | NOOPENDRAIN, &mmc_base->con);
dsor = 240;
mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK),
(ICE_STOP | DTO_15THDTO));
mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK,
(dsor << CLKD_OFFSET) | ICE_OSCILLATE);
start = get_timer(0);
while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY) {
if (get_timer(0) - start > MAX_RETRY_MS) {
printf("%s: timedout waiting for ics!\n", __func__);
return -ETIMEDOUT;
}
}
writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl);
writel(readl(&mmc_base->hctl) | SDBP_PWRON, &mmc_base->hctl);
mmc_enable_irq(mmc, NULL);
#if !CONFIG_IS_ENABLED(DM_MMC)
mmc_init_stream(mmc_base);
#endif
return 0;
}
/*
* MMC controller internal finite state machine reset
*
* Used to reset command or data internal state machines, using respectively
* SRC or SRD bit of SYSCTL register
*/
static void mmc_reset_controller_fsm(struct hsmmc *mmc_base, u32 bit)
{
ulong start;
mmc_reg_out(&mmc_base->sysctl, bit, bit);
omap_hsmmc: omap4+/am335x: modify MMC controller internal fsm reset func "mmc_send_cmd: timeout: No status update" error sometimes happens in omap_hsmmc driver func mmc_send_cmd() when the MMC controller card identification and selection sequence is executed for eMMC on OMAP4 boards. It happens due to incorrect execution of CMD line reset procedure for OMAP4. Because CMD(DAT) lines reset procedures are slightly different for OMAP3 and OMAP4(AM335x,OMAP5,DRA7xx). According to OMAP3 TRM: Set SRC(SRD) bit in MMCHS_SYSCTL register to 0x1 and wait until it returns to 0x0. According to OMAP4(AM335x,OMAP5,DRA7xx) TRMs, CMD(DATA) lines reset procedure steps must be as follows: 1. Initiate CMD(DAT) line reset by writing 0x1 to SRC(SRD) bit in MMCHS_SYSCTL register (SD_SYSCTL for AM335x). 2. Poll the SRC(SRD) bit until it is set to 0x1. 3. Wait until the SRC(SRD) bit returns to 0x0 (reset procedure is completed). Unfortunately, at present omap_hsmmc driver has support only for OMAP3. And as result step #2 is missing for OMAP4(AM335x,OMAP5,DRA7xx). This sometimes leads to the fact that the waiting loop which is required in step #3 does not executed, because SRC bit does not set yet (at the moment of checking a condition of a loop execution). And as a result this can cause to timeout error when sending a next command. In the particular case (working with eMMC witch do not respond to some SD specific command) due to incorrect reset sequence after command SD_CMD_SEND_IF_COND which finished with CTO flag within 64 clock cycles, the next command MMC_CMD_APP_CMD leads to a timeout error within 1s. So, extend CMD(DATA) lines reset procedure in func mmc_reset_controller_fsm() by adding the missing step #2 for OMAP4+/AM335x boards. Signed-off-by: Oleksandr Tyshchenko <oleksandr.tyshchenko@ti.com> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
2013-08-06 10:44:16 +00:00
/*
* CMD(DAT) lines reset procedures are slightly different
* for OMAP3 and OMAP4(AM335x,OMAP5,DRA7xx).
* According to OMAP3 TRM:
* Set SRC(SRD) bit in MMCHS_SYSCTL register to 0x1 and wait until it
* returns to 0x0.
* According to OMAP4(AM335x,OMAP5,DRA7xx) TRMs, CMD(DATA) lines reset
* procedure steps must be as follows:
* 1. Initiate CMD(DAT) line reset by writing 0x1 to SRC(SRD) bit in
* MMCHS_SYSCTL register (SD_SYSCTL for AM335x).
* 2. Poll the SRC(SRD) bit until it is set to 0x1.
* 3. Wait until the SRC (SRD) bit returns to 0x0
* (reset procedure is completed).
*/
#if defined(CONFIG_OMAP44XX) || defined(CONFIG_OMAP54XX) || \
defined(CONFIG_AM33XX) || defined(CONFIG_AM43XX)
omap_hsmmc: omap4+/am335x: modify MMC controller internal fsm reset func "mmc_send_cmd: timeout: No status update" error sometimes happens in omap_hsmmc driver func mmc_send_cmd() when the MMC controller card identification and selection sequence is executed for eMMC on OMAP4 boards. It happens due to incorrect execution of CMD line reset procedure for OMAP4. Because CMD(DAT) lines reset procedures are slightly different for OMAP3 and OMAP4(AM335x,OMAP5,DRA7xx). According to OMAP3 TRM: Set SRC(SRD) bit in MMCHS_SYSCTL register to 0x1 and wait until it returns to 0x0. According to OMAP4(AM335x,OMAP5,DRA7xx) TRMs, CMD(DATA) lines reset procedure steps must be as follows: 1. Initiate CMD(DAT) line reset by writing 0x1 to SRC(SRD) bit in MMCHS_SYSCTL register (SD_SYSCTL for AM335x). 2. Poll the SRC(SRD) bit until it is set to 0x1. 3. Wait until the SRC(SRD) bit returns to 0x0 (reset procedure is completed). Unfortunately, at present omap_hsmmc driver has support only for OMAP3. And as result step #2 is missing for OMAP4(AM335x,OMAP5,DRA7xx). This sometimes leads to the fact that the waiting loop which is required in step #3 does not executed, because SRC bit does not set yet (at the moment of checking a condition of a loop execution). And as a result this can cause to timeout error when sending a next command. In the particular case (working with eMMC witch do not respond to some SD specific command) due to incorrect reset sequence after command SD_CMD_SEND_IF_COND which finished with CTO flag within 64 clock cycles, the next command MMC_CMD_APP_CMD leads to a timeout error within 1s. So, extend CMD(DATA) lines reset procedure in func mmc_reset_controller_fsm() by adding the missing step #2 for OMAP4+/AM335x boards. Signed-off-by: Oleksandr Tyshchenko <oleksandr.tyshchenko@ti.com> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
2013-08-06 10:44:16 +00:00
if (!(readl(&mmc_base->sysctl) & bit)) {
start = get_timer(0);
while (!(readl(&mmc_base->sysctl) & bit)) {
if (get_timer(0) - start > MMC_TIMEOUT_MS)
omap_hsmmc: omap4+/am335x: modify MMC controller internal fsm reset func "mmc_send_cmd: timeout: No status update" error sometimes happens in omap_hsmmc driver func mmc_send_cmd() when the MMC controller card identification and selection sequence is executed for eMMC on OMAP4 boards. It happens due to incorrect execution of CMD line reset procedure for OMAP4. Because CMD(DAT) lines reset procedures are slightly different for OMAP3 and OMAP4(AM335x,OMAP5,DRA7xx). According to OMAP3 TRM: Set SRC(SRD) bit in MMCHS_SYSCTL register to 0x1 and wait until it returns to 0x0. According to OMAP4(AM335x,OMAP5,DRA7xx) TRMs, CMD(DATA) lines reset procedure steps must be as follows: 1. Initiate CMD(DAT) line reset by writing 0x1 to SRC(SRD) bit in MMCHS_SYSCTL register (SD_SYSCTL for AM335x). 2. Poll the SRC(SRD) bit until it is set to 0x1. 3. Wait until the SRC(SRD) bit returns to 0x0 (reset procedure is completed). Unfortunately, at present omap_hsmmc driver has support only for OMAP3. And as result step #2 is missing for OMAP4(AM335x,OMAP5,DRA7xx). This sometimes leads to the fact that the waiting loop which is required in step #3 does not executed, because SRC bit does not set yet (at the moment of checking a condition of a loop execution). And as a result this can cause to timeout error when sending a next command. In the particular case (working with eMMC witch do not respond to some SD specific command) due to incorrect reset sequence after command SD_CMD_SEND_IF_COND which finished with CTO flag within 64 clock cycles, the next command MMC_CMD_APP_CMD leads to a timeout error within 1s. So, extend CMD(DATA) lines reset procedure in func mmc_reset_controller_fsm() by adding the missing step #2 for OMAP4+/AM335x boards. Signed-off-by: Oleksandr Tyshchenko <oleksandr.tyshchenko@ti.com> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
2013-08-06 10:44:16 +00:00
return;
}
}
#endif
start = get_timer(0);
while ((readl(&mmc_base->sysctl) & bit) != 0) {
if (get_timer(0) - start > MAX_RETRY_MS) {
printf("%s: timedout waiting for sysctl %x to clear\n",
__func__, bit);
return;
}
}
}
#ifdef CONFIG_MMC_OMAP_HS_ADMA
static void omap_hsmmc_adma_desc(struct mmc *mmc, char *buf, u16 len, bool end)
{
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
struct omap_hsmmc_adma_desc *desc;
u8 attr;
desc = &priv->adma_desc_table[priv->desc_slot];
attr = ADMA_DESC_ATTR_VALID | ADMA_DESC_TRANSFER_DATA;
if (!end)
priv->desc_slot++;
else
attr |= ADMA_DESC_ATTR_END;
desc->len = len;
desc->addr = (u32)buf;
desc->reserved = 0;
desc->attr = attr;
}
static void omap_hsmmc_prepare_adma_table(struct mmc *mmc,
struct mmc_data *data)
{
uint total_len = data->blocksize * data->blocks;
uint desc_count = DIV_ROUND_UP(total_len, ADMA_MAX_LEN);
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
int i = desc_count;
char *buf;
priv->desc_slot = 0;
priv->adma_desc_table = (struct omap_hsmmc_adma_desc *)
memalign(ARCH_DMA_MINALIGN, desc_count *
sizeof(struct omap_hsmmc_adma_desc));
if (data->flags & MMC_DATA_READ)
buf = data->dest;
else
buf = (char *)data->src;
while (--i) {
omap_hsmmc_adma_desc(mmc, buf, ADMA_MAX_LEN, false);
buf += ADMA_MAX_LEN;
total_len -= ADMA_MAX_LEN;
}
omap_hsmmc_adma_desc(mmc, buf, total_len, true);
flush_dcache_range((long)priv->adma_desc_table,
(long)priv->adma_desc_table +
ROUND(desc_count *
sizeof(struct omap_hsmmc_adma_desc),
ARCH_DMA_MINALIGN));
}
static void omap_hsmmc_prepare_data(struct mmc *mmc, struct mmc_data *data)
{
struct hsmmc *mmc_base;
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
u32 val;
char *buf;
mmc_base = priv->base_addr;
omap_hsmmc_prepare_adma_table(mmc, data);
if (data->flags & MMC_DATA_READ)
buf = data->dest;
else
buf = (char *)data->src;
val = readl(&mmc_base->hctl);
val |= DMA_SELECT;
writel(val, &mmc_base->hctl);
val = readl(&mmc_base->con);
val |= DMA_MASTER;
writel(val, &mmc_base->con);
writel((u32)priv->adma_desc_table, &mmc_base->admasal);
flush_dcache_range((u32)buf,
(u32)buf +
ROUND(data->blocksize * data->blocks,
ARCH_DMA_MINALIGN));
}
static void omap_hsmmc_dma_cleanup(struct mmc *mmc)
{
struct hsmmc *mmc_base;
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
u32 val;
mmc_base = priv->base_addr;
val = readl(&mmc_base->con);
val &= ~DMA_MASTER;
writel(val, &mmc_base->con);
val = readl(&mmc_base->hctl);
val &= ~DMA_SELECT;
writel(val, &mmc_base->hctl);
kfree(priv->adma_desc_table);
}
#else
#define omap_hsmmc_adma_desc
#define omap_hsmmc_prepare_adma_table
#define omap_hsmmc_prepare_data
#define omap_hsmmc_dma_cleanup
#endif
#if !CONFIG_IS_ENABLED(DM_MMC)
static int omap_hsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
struct mmc_data *data)
{
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
#else
static int omap_hsmmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
struct mmc_data *data)
{
struct omap_hsmmc_data *priv = dev_get_priv(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct mmc *mmc = upriv->mmc;
#endif
struct hsmmc *mmc_base;
unsigned int flags, mmc_stat;
ulong start;
priv->last_cmd = cmd->cmdidx;
mmc_base = priv->base_addr;
if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
return 0;
start = get_timer(0);
while ((readl(&mmc_base->pstate) & (DATI_MASK | CMDI_MASK)) != 0) {
if (get_timer(0) - start > MAX_RETRY_MS) {
printf("%s: timedout waiting on cmd inhibit to clear\n",
__func__);
return -ETIMEDOUT;
}
}
writel(0xFFFFFFFF, &mmc_base->stat);
start = get_timer(0);
while (readl(&mmc_base->stat)) {
if (get_timer(0) - start > MAX_RETRY_MS) {
printf("%s: timedout waiting for STAT (%x) to clear\n",
__func__, readl(&mmc_base->stat));
return -ETIMEDOUT;
}
}
/*
* CMDREG
* CMDIDX[13:8] : Command index
* DATAPRNT[5] : Data Present Select
* ENCMDIDX[4] : Command Index Check Enable
* ENCMDCRC[3] : Command CRC Check Enable
* RSPTYP[1:0]
* 00 = No Response
* 01 = Length 136
* 10 = Length 48
* 11 = Length 48 Check busy after response
*/
/* Delay added before checking the status of frq change
* retry not supported by mmc.c(core file)
*/
if (cmd->cmdidx == SD_CMD_APP_SEND_SCR)
udelay(50000); /* wait 50 ms */
if (!(cmd->resp_type & MMC_RSP_PRESENT))
flags = 0;
else if (cmd->resp_type & MMC_RSP_136)
flags = RSP_TYPE_LGHT136 | CICE_NOCHECK;
else if (cmd->resp_type & MMC_RSP_BUSY)
flags = RSP_TYPE_LGHT48B;
else
flags = RSP_TYPE_LGHT48;
/* enable default flags */
flags = flags | (CMD_TYPE_NORMAL | CICE_NOCHECK | CCCE_NOCHECK |
MSBS_SGLEBLK);
flags &= ~(ACEN_ENABLE | BCE_ENABLE | DE_ENABLE);
if (cmd->resp_type & MMC_RSP_CRC)
flags |= CCCE_CHECK;
if (cmd->resp_type & MMC_RSP_OPCODE)
flags |= CICE_CHECK;
if (data) {
if ((cmd->cmdidx == MMC_CMD_READ_MULTIPLE_BLOCK) ||
(cmd->cmdidx == MMC_CMD_WRITE_MULTIPLE_BLOCK)) {
flags |= (MSBS_MULTIBLK | BCE_ENABLE | ACEN_ENABLE);
data->blocksize = 512;
writel(data->blocksize | (data->blocks << 16),
&mmc_base->blk);
} else
writel(data->blocksize | NBLK_STPCNT, &mmc_base->blk);
if (data->flags & MMC_DATA_READ)
flags |= (DP_DATA | DDIR_READ);
else
flags |= (DP_DATA | DDIR_WRITE);
#ifdef CONFIG_MMC_OMAP_HS_ADMA
if ((priv->controller_flags & OMAP_HSMMC_USE_ADMA) &&
!mmc_is_tuning_cmd(cmd->cmdidx)) {
omap_hsmmc_prepare_data(mmc, data);
flags |= DE_ENABLE;
}
#endif
}
mmc_enable_irq(mmc, cmd);
writel(cmd->cmdarg, &mmc_base->arg);
udelay(20); /* To fix "No status update" error on eMMC */
writel((cmd->cmdidx << 24) | flags, &mmc_base->cmd);
start = get_timer(0);
do {
mmc_stat = readl(&mmc_base->stat);
if (get_timer(start) > MAX_RETRY_MS) {
printf("%s : timeout: No status update\n", __func__);
return -ETIMEDOUT;
}
} while (!mmc_stat);
if ((mmc_stat & IE_CTO) != 0) {
mmc_reset_controller_fsm(mmc_base, SYSCTL_SRC);
return -ETIMEDOUT;
} else if ((mmc_stat & ERRI_MASK) != 0)
return -1;
if (mmc_stat & CC_MASK) {
writel(CC_MASK, &mmc_base->stat);
if (cmd->resp_type & MMC_RSP_PRESENT) {
if (cmd->resp_type & MMC_RSP_136) {
/* response type 2 */
cmd->response[3] = readl(&mmc_base->rsp10);
cmd->response[2] = readl(&mmc_base->rsp32);
cmd->response[1] = readl(&mmc_base->rsp54);
cmd->response[0] = readl(&mmc_base->rsp76);
} else
/* response types 1, 1b, 3, 4, 5, 6 */
cmd->response[0] = readl(&mmc_base->rsp10);
}
}
#ifdef CONFIG_MMC_OMAP_HS_ADMA
if ((priv->controller_flags & OMAP_HSMMC_USE_ADMA) && data &&
!mmc_is_tuning_cmd(cmd->cmdidx)) {
u32 sz_mb, timeout;
if (mmc_stat & IE_ADMAE) {
omap_hsmmc_dma_cleanup(mmc);
return -EIO;
}
sz_mb = DIV_ROUND_UP(data->blocksize * data->blocks, 1 << 20);
timeout = sz_mb * DMA_TIMEOUT_PER_MB;
if (timeout < MAX_RETRY_MS)
timeout = MAX_RETRY_MS;
start = get_timer(0);
do {
mmc_stat = readl(&mmc_base->stat);
if (mmc_stat & TC_MASK) {
writel(readl(&mmc_base->stat) | TC_MASK,
&mmc_base->stat);
break;
}
if (get_timer(start) > timeout) {
printf("%s : DMA timeout: No status update\n",
__func__);
return -ETIMEDOUT;
}
} while (1);
omap_hsmmc_dma_cleanup(mmc);
return 0;
}
#endif
if (data && (data->flags & MMC_DATA_READ)) {
mmc_read_data(mmc_base, data->dest,
data->blocksize * data->blocks);
} else if (data && (data->flags & MMC_DATA_WRITE)) {
mmc_write_data(mmc_base, data->src,
data->blocksize * data->blocks);
}
return 0;
}
static int mmc_read_data(struct hsmmc *mmc_base, char *buf, unsigned int size)
{
unsigned int *output_buf = (unsigned int *)buf;
unsigned int mmc_stat;
unsigned int count;
/*
* Start Polled Read
*/
count = (size > MMCSD_SECTOR_SIZE) ? MMCSD_SECTOR_SIZE : size;
count /= 4;
while (size) {
ulong start = get_timer(0);
do {
mmc_stat = readl(&mmc_base->stat);
if (get_timer(0) - start > MAX_RETRY_MS) {
printf("%s: timedout waiting for status!\n",
__func__);
return -ETIMEDOUT;
}
} while (mmc_stat == 0);
if ((mmc_stat & (IE_DTO | IE_DCRC | IE_DEB)) != 0)
mmc_reset_controller_fsm(mmc_base, SYSCTL_SRD);
if ((mmc_stat & ERRI_MASK) != 0)
return 1;
if (mmc_stat & BRR_MASK) {
unsigned int k;
writel(readl(&mmc_base->stat) | BRR_MASK,
&mmc_base->stat);
for (k = 0; k < count; k++) {
*output_buf = readl(&mmc_base->data);
output_buf++;
}
size -= (count*4);
}
if (mmc_stat & BWR_MASK)
writel(readl(&mmc_base->stat) | BWR_MASK,
&mmc_base->stat);
if (mmc_stat & TC_MASK) {
writel(readl(&mmc_base->stat) | TC_MASK,
&mmc_base->stat);
break;
}
}
return 0;
}
#if CONFIG_IS_ENABLED(MMC_WRITE)
static int mmc_write_data(struct hsmmc *mmc_base, const char *buf,
unsigned int size)
{
unsigned int *input_buf = (unsigned int *)buf;
unsigned int mmc_stat;
unsigned int count;
/*
* Start Polled Write
*/
count = (size > MMCSD_SECTOR_SIZE) ? MMCSD_SECTOR_SIZE : size;
count /= 4;
while (size) {
ulong start = get_timer(0);
do {
mmc_stat = readl(&mmc_base->stat);
if (get_timer(0) - start > MAX_RETRY_MS) {
printf("%s: timedout waiting for status!\n",
__func__);
return -ETIMEDOUT;
}
} while (mmc_stat == 0);
if ((mmc_stat & (IE_DTO | IE_DCRC | IE_DEB)) != 0)
mmc_reset_controller_fsm(mmc_base, SYSCTL_SRD);
if ((mmc_stat & ERRI_MASK) != 0)
return 1;
if (mmc_stat & BWR_MASK) {
unsigned int k;
writel(readl(&mmc_base->stat) | BWR_MASK,
&mmc_base->stat);
for (k = 0; k < count; k++) {
writel(*input_buf, &mmc_base->data);
input_buf++;
}
size -= (count*4);
}
if (mmc_stat & BRR_MASK)
writel(readl(&mmc_base->stat) | BRR_MASK,
&mmc_base->stat);
if (mmc_stat & TC_MASK) {
writel(readl(&mmc_base->stat) | TC_MASK,
&mmc_base->stat);
break;
}
}
return 0;
}
#else
static int mmc_write_data(struct hsmmc *mmc_base, const char *buf,
unsigned int size)
{
return -ENOTSUPP;
}
#endif
static void omap_hsmmc_stop_clock(struct hsmmc *mmc_base)
{
writel(readl(&mmc_base->sysctl) & ~CEN_ENABLE, &mmc_base->sysctl);
}
static void omap_hsmmc_start_clock(struct hsmmc *mmc_base)
{
writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl);
}
static void omap_hsmmc_set_clock(struct mmc *mmc)
{
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
struct hsmmc *mmc_base;
unsigned int dsor = 0;
ulong start;
mmc_base = priv->base_addr;
omap_hsmmc_stop_clock(mmc_base);
/* TODO: Is setting DTO required here? */
mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK),
(ICE_STOP | DTO_15THDTO));
if (mmc->clock != 0) {
dsor = DIV_ROUND_UP(MMC_CLOCK_REFERENCE * 1000000, mmc->clock);
if (dsor > CLKD_MAX)
dsor = CLKD_MAX;
} else {
dsor = CLKD_MAX;
}
mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK,
(dsor << CLKD_OFFSET) | ICE_OSCILLATE);
start = get_timer(0);
while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY) {
if (get_timer(0) - start > MAX_RETRY_MS) {
printf("%s: timedout waiting for ics!\n", __func__);
return;
}
}
priv->clock = MMC_CLOCK_REFERENCE * 1000000 / dsor;
mmc->clock = priv->clock;
omap_hsmmc_start_clock(mmc_base);
}
static void omap_hsmmc_set_bus_width(struct mmc *mmc)
{
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
struct hsmmc *mmc_base;
mmc_base = priv->base_addr;
/* configue bus width */
switch (mmc->bus_width) {
case 8:
writel(readl(&mmc_base->con) | DTW_8_BITMODE,
&mmc_base->con);
break;
case 4:
writel(readl(&mmc_base->con) & ~DTW_8_BITMODE,
&mmc_base->con);
writel(readl(&mmc_base->hctl) | DTW_4_BITMODE,
&mmc_base->hctl);
break;
case 1:
default:
writel(readl(&mmc_base->con) & ~DTW_8_BITMODE,
&mmc_base->con);
writel(readl(&mmc_base->hctl) & ~DTW_4_BITMODE,
&mmc_base->hctl);
break;
}
priv->bus_width = mmc->bus_width;
}
#if !CONFIG_IS_ENABLED(DM_MMC)
static int omap_hsmmc_set_ios(struct mmc *mmc)
{
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
#else
static int omap_hsmmc_set_ios(struct udevice *dev)
{
struct omap_hsmmc_data *priv = dev_get_priv(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct mmc *mmc = upriv->mmc;
#endif
struct hsmmc *mmc_base = priv->base_addr;
int ret = 0;
if (priv->bus_width != mmc->bus_width)
omap_hsmmc_set_bus_width(mmc);
if (priv->clock != mmc->clock)
omap_hsmmc_set_clock(mmc);
if (mmc->clk_disable)
omap_hsmmc_stop_clock(mmc_base);
else
omap_hsmmc_start_clock(mmc_base);
#if CONFIG_IS_ENABLED(DM_MMC)
if (priv->mode != mmc->selected_mode)
omap_hsmmc_set_timing(mmc);
#if CONFIG_IS_ENABLED(MMC_IO_VOLTAGE)
if (priv->signal_voltage != mmc->signal_voltage)
ret = omap_hsmmc_set_signal_voltage(mmc);
#endif
#endif
return ret;
}
#ifdef OMAP_HSMMC_USE_GPIO
#if CONFIG_IS_ENABLED(DM_MMC)
static int omap_hsmmc_getcd(struct udevice *dev)
{
struct omap_hsmmc_data *priv = dev_get_priv(dev);
int value;
value = dm_gpio_get_value(&priv->cd_gpio);
/* if no CD return as 1 */
if (value < 0)
return 1;
if (priv->cd_inverted)
return !value;
return value;
}
static int omap_hsmmc_getwp(struct udevice *dev)
{
struct omap_hsmmc_data *priv = dev_get_priv(dev);
int value;
value = dm_gpio_get_value(&priv->wp_gpio);
/* if no WP return as 0 */
if (value < 0)
return 0;
return value;
}
#else
static int omap_hsmmc_getcd(struct mmc *mmc)
{
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
int cd_gpio;
/* if no CD return as 1 */
cd_gpio = priv->cd_gpio;
if (cd_gpio < 0)
return 1;
/* NOTE: assumes card detect signal is active-low */
return !gpio_get_value(cd_gpio);
}
static int omap_hsmmc_getwp(struct mmc *mmc)
{
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
int wp_gpio;
/* if no WP return as 0 */
wp_gpio = priv->wp_gpio;
if (wp_gpio < 0)
return 0;
/* NOTE: assumes write protect signal is active-high */
return gpio_get_value(wp_gpio);
}
#endif
#endif
#if CONFIG_IS_ENABLED(DM_MMC)
static const struct dm_mmc_ops omap_hsmmc_ops = {
.send_cmd = omap_hsmmc_send_cmd,
.set_ios = omap_hsmmc_set_ios,
#ifdef OMAP_HSMMC_USE_GPIO
.get_cd = omap_hsmmc_getcd,
.get_wp = omap_hsmmc_getwp,
#endif
#ifdef MMC_SUPPORTS_TUNING
.execute_tuning = omap_hsmmc_execute_tuning,
#endif
.send_init_stream = omap_hsmmc_send_init_stream,
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
.wait_dat0 = omap_hsmmc_wait_dat0,
#endif
};
#else
static const struct mmc_ops omap_hsmmc_ops = {
.send_cmd = omap_hsmmc_send_cmd,
.set_ios = omap_hsmmc_set_ios,
.init = omap_hsmmc_init_setup,
#ifdef OMAP_HSMMC_USE_GPIO
.getcd = omap_hsmmc_getcd,
.getwp = omap_hsmmc_getwp,
#endif
};
#endif
#if !CONFIG_IS_ENABLED(DM_MMC)
int omap_mmc_init(int dev_index, uint host_caps_mask, uint f_max, int cd_gpio,
int wp_gpio)
{
struct mmc *mmc;
struct omap_hsmmc_data *priv;
struct mmc_config *cfg;
uint host_caps_val;
priv = calloc(1, sizeof(*priv));
if (priv == NULL)
return -1;
host_caps_val = MMC_MODE_4BIT | MMC_MODE_HS_52MHz | MMC_MODE_HS;
switch (dev_index) {
case 0:
priv->base_addr = (struct hsmmc *)OMAP_HSMMC1_BASE;
break;
#ifdef OMAP_HSMMC2_BASE
case 1:
priv->base_addr = (struct hsmmc *)OMAP_HSMMC2_BASE;
#if (defined(CONFIG_OMAP44XX) || defined(CONFIG_OMAP54XX) || \
defined(CONFIG_DRA7XX) || defined(CONFIG_AM33XX) || \
defined(CONFIG_AM43XX) || defined(CONFIG_SOC_KEYSTONE)) && \
defined(CONFIG_HSMMC2_8BIT)
/* Enable 8-bit interface for eMMC on OMAP4/5 or DRA7XX */
host_caps_val |= MMC_MODE_8BIT;
#endif
break;
#endif
#ifdef OMAP_HSMMC3_BASE
case 2:
priv->base_addr = (struct hsmmc *)OMAP_HSMMC3_BASE;
#if defined(CONFIG_DRA7XX) && defined(CONFIG_HSMMC3_8BIT)
/* Enable 8-bit interface for eMMC on DRA7XX */
host_caps_val |= MMC_MODE_8BIT;
#endif
break;
#endif
default:
priv->base_addr = (struct hsmmc *)OMAP_HSMMC1_BASE;
return 1;
}
#ifdef OMAP_HSMMC_USE_GPIO
/* on error gpio values are set to -1, which is what we want */
priv->cd_gpio = omap_mmc_setup_gpio_in(cd_gpio, "mmc_cd");
priv->wp_gpio = omap_mmc_setup_gpio_in(wp_gpio, "mmc_wp");
#endif
cfg = &priv->cfg;
cfg->name = "OMAP SD/MMC";
cfg->ops = &omap_hsmmc_ops;
cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
cfg->host_caps = host_caps_val & ~host_caps_mask;
cfg->f_min = 400000;
if (f_max != 0)
cfg->f_max = f_max;
else {
if (cfg->host_caps & MMC_MODE_HS) {
if (cfg->host_caps & MMC_MODE_HS_52MHz)
cfg->f_max = 52000000;
else
cfg->f_max = 26000000;
} else
cfg->f_max = 20000000;
}
cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
#if defined(CONFIG_OMAP34XX)
/*
* Silicon revs 2.1 and older do not support multiblock transfers.
*/
if ((get_cpu_family() == CPU_OMAP34XX) && (get_cpu_rev() <= CPU_3XX_ES21))
cfg->b_max = 1;
#endif
mmc = mmc_create(cfg, priv);
if (mmc == NULL)
return -1;
return 0;
}
#else
#ifdef CONFIG_IODELAY_RECALIBRATION
static struct pad_conf_entry *
omap_hsmmc_get_pad_conf_entry(const fdt32_t *pinctrl, int count)
{
int index = 0;
struct pad_conf_entry *padconf;
padconf = (struct pad_conf_entry *)malloc(sizeof(*padconf) * count);
if (!padconf) {
debug("failed to allocate memory\n");
return 0;
}
while (index < count) {
padconf[index].offset = fdt32_to_cpu(pinctrl[2 * index]);
padconf[index].val = fdt32_to_cpu(pinctrl[2 * index + 1]);
index++;
}
return padconf;
}
static struct iodelay_cfg_entry *
omap_hsmmc_get_iodelay_cfg_entry(const fdt32_t *pinctrl, int count)
{
int index = 0;
struct iodelay_cfg_entry *iodelay;
iodelay = (struct iodelay_cfg_entry *)malloc(sizeof(*iodelay) * count);
if (!iodelay) {
debug("failed to allocate memory\n");
return 0;
}
while (index < count) {
iodelay[index].offset = fdt32_to_cpu(pinctrl[3 * index]);
iodelay[index].a_delay = fdt32_to_cpu(pinctrl[3 * index + 1]);
iodelay[index].g_delay = fdt32_to_cpu(pinctrl[3 * index + 2]);
index++;
}
return iodelay;
}
static const fdt32_t *omap_hsmmc_get_pinctrl_entry(u32 phandle,
const char *name, int *len)
{
const void *fdt = gd->fdt_blob;
int offset;
const fdt32_t *pinctrl;
offset = fdt_node_offset_by_phandle(fdt, phandle);
if (offset < 0) {
debug("failed to get pinctrl node %s.\n",
fdt_strerror(offset));
return 0;
}
pinctrl = fdt_getprop(fdt, offset, name, len);
if (!pinctrl) {
debug("failed to get property %s\n", name);
return 0;
}
return pinctrl;
}
static uint32_t omap_hsmmc_get_pad_conf_phandle(struct mmc *mmc,
char *prop_name)
{
const void *fdt = gd->fdt_blob;
const __be32 *phandle;
int node = dev_of_offset(mmc->dev);
phandle = fdt_getprop(fdt, node, prop_name, NULL);
if (!phandle) {
debug("failed to get property %s\n", prop_name);
return 0;
}
return fdt32_to_cpu(*phandle);
}
static uint32_t omap_hsmmc_get_iodelay_phandle(struct mmc *mmc,
char *prop_name)
{
const void *fdt = gd->fdt_blob;
const __be32 *phandle;
int len;
int count;
int node = dev_of_offset(mmc->dev);
phandle = fdt_getprop(fdt, node, prop_name, &len);
if (!phandle) {
debug("failed to get property %s\n", prop_name);
return 0;
}
/* No manual mode iodelay values if count < 2 */
count = len / sizeof(*phandle);
if (count < 2)
return 0;
return fdt32_to_cpu(*(phandle + 1));
}
static struct pad_conf_entry *
omap_hsmmc_get_pad_conf(struct mmc *mmc, char *prop_name, int *npads)
{
int len;
int count;
struct pad_conf_entry *padconf;
u32 phandle;
const fdt32_t *pinctrl;
phandle = omap_hsmmc_get_pad_conf_phandle(mmc, prop_name);
if (!phandle)
return ERR_PTR(-EINVAL);
pinctrl = omap_hsmmc_get_pinctrl_entry(phandle, "pinctrl-single,pins",
&len);
if (!pinctrl)
return ERR_PTR(-EINVAL);
count = (len / sizeof(*pinctrl)) / 2;
padconf = omap_hsmmc_get_pad_conf_entry(pinctrl, count);
if (!padconf)
return ERR_PTR(-EINVAL);
*npads = count;
return padconf;
}
static struct iodelay_cfg_entry *
omap_hsmmc_get_iodelay(struct mmc *mmc, char *prop_name, int *niodelay)
{
int len;
int count;
struct iodelay_cfg_entry *iodelay;
u32 phandle;
const fdt32_t *pinctrl;
phandle = omap_hsmmc_get_iodelay_phandle(mmc, prop_name);
/* Not all modes have manual mode iodelay values. So its not fatal */
if (!phandle)
return 0;
pinctrl = omap_hsmmc_get_pinctrl_entry(phandle, "pinctrl-pin-array",
&len);
if (!pinctrl)
return ERR_PTR(-EINVAL);
count = (len / sizeof(*pinctrl)) / 3;
iodelay = omap_hsmmc_get_iodelay_cfg_entry(pinctrl, count);
if (!iodelay)
return ERR_PTR(-EINVAL);
*niodelay = count;
return iodelay;
}
static struct omap_hsmmc_pinctrl_state *
omap_hsmmc_get_pinctrl_by_mode(struct mmc *mmc, char *mode)
{
int index;
int npads = 0;
int niodelays = 0;
const void *fdt = gd->fdt_blob;
int node = dev_of_offset(mmc->dev);
char prop_name[11];
struct omap_hsmmc_pinctrl_state *pinctrl_state;
pinctrl_state = (struct omap_hsmmc_pinctrl_state *)
malloc(sizeof(*pinctrl_state));
if (!pinctrl_state) {
debug("failed to allocate memory\n");
return 0;
}
index = fdt_stringlist_search(fdt, node, "pinctrl-names", mode);
if (index < 0) {
debug("fail to find %s mode %s\n", mode, fdt_strerror(index));
goto err_pinctrl_state;
}
sprintf(prop_name, "pinctrl-%d", index);
pinctrl_state->padconf = omap_hsmmc_get_pad_conf(mmc, prop_name,
&npads);
if (IS_ERR(pinctrl_state->padconf))
goto err_pinctrl_state;
pinctrl_state->npads = npads;
pinctrl_state->iodelay = omap_hsmmc_get_iodelay(mmc, prop_name,
&niodelays);
if (IS_ERR(pinctrl_state->iodelay))
goto err_padconf;
pinctrl_state->niodelays = niodelays;
return pinctrl_state;
err_padconf:
kfree(pinctrl_state->padconf);
err_pinctrl_state:
kfree(pinctrl_state);
return 0;
}
#define OMAP_HSMMC_SETUP_PINCTRL(capmask, mode, optional) \
do { \
struct omap_hsmmc_pinctrl_state *s = NULL; \
char str[20]; \
if (!(cfg->host_caps & capmask)) \
break; \
\
if (priv->hw_rev) { \
sprintf(str, "%s-%s", #mode, priv->hw_rev); \
s = omap_hsmmc_get_pinctrl_by_mode(mmc, str); \
} \
\
if (!s) \
s = omap_hsmmc_get_pinctrl_by_mode(mmc, #mode); \
\
if (!s && !optional) { \
debug("%s: no pinctrl for %s\n", \
mmc->dev->name, #mode); \
cfg->host_caps &= ~(capmask); \
} else { \
priv->mode##_pinctrl_state = s; \
} \
} while (0)
static int omap_hsmmc_get_pinctrl_state(struct mmc *mmc)
{
struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
struct mmc_config *cfg = omap_hsmmc_get_cfg(mmc);
struct omap_hsmmc_pinctrl_state *default_pinctrl;
if (!(priv->controller_flags & OMAP_HSMMC_REQUIRE_IODELAY))
return 0;
default_pinctrl = omap_hsmmc_get_pinctrl_by_mode(mmc, "default");
if (!default_pinctrl) {
printf("no pinctrl state for default mode\n");
return -EINVAL;
}
priv->default_pinctrl_state = default_pinctrl;
OMAP_HSMMC_SETUP_PINCTRL(MMC_CAP(UHS_SDR104), sdr104, false);
OMAP_HSMMC_SETUP_PINCTRL(MMC_CAP(UHS_SDR50), sdr50, false);
OMAP_HSMMC_SETUP_PINCTRL(MMC_CAP(UHS_DDR50), ddr50, false);
OMAP_HSMMC_SETUP_PINCTRL(MMC_CAP(UHS_SDR25), sdr25, false);
OMAP_HSMMC_SETUP_PINCTRL(MMC_CAP(UHS_SDR12), sdr12, false);
OMAP_HSMMC_SETUP_PINCTRL(MMC_CAP(MMC_HS_200), hs200_1_8v, false);
OMAP_HSMMC_SETUP_PINCTRL(MMC_CAP(MMC_DDR_52), ddr_1_8v, false);
OMAP_HSMMC_SETUP_PINCTRL(MMC_MODE_HS, hs, true);
return 0;
}
#endif
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
#ifdef CONFIG_OMAP54XX
__weak const struct mmc_platform_fixups *platform_fixups_mmc(uint32_t addr)
{
return NULL;
}
#endif
static int omap_hsmmc_ofdata_to_platdata(struct udevice *dev)
{
struct omap_hsmmc_plat *plat = dev_get_platdata(dev);
struct omap_mmc_of_data *of_data = (void *)dev_get_driver_data(dev);
struct mmc_config *cfg = &plat->cfg;
#ifdef CONFIG_OMAP54XX
const struct mmc_platform_fixups *fixups;
#endif
const void *fdt = gd->fdt_blob;
int node = dev_of_offset(dev);
int ret;
plat->base_addr = map_physmem(devfdt_get_addr(dev),
sizeof(struct hsmmc *),
MAP_NOCACHE);
ret = mmc_of_parse(dev, cfg);
if (ret < 0)
return ret;
if (!cfg->f_max)
cfg->f_max = 52000000;
cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
cfg->f_min = 400000;
cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
if (fdtdec_get_bool(fdt, node, "ti,dual-volt"))
plat->controller_flags |= OMAP_HSMMC_SUPPORTS_DUAL_VOLT;
if (fdtdec_get_bool(fdt, node, "no-1-8-v"))
plat->controller_flags |= OMAP_HSMMC_NO_1_8_V;
if (of_data)
plat->controller_flags |= of_data->controller_flags;
#ifdef CONFIG_OMAP54XX
fixups = platform_fixups_mmc(devfdt_get_addr(dev));
if (fixups) {
plat->hw_rev = fixups->hw_rev;
cfg->host_caps &= ~fixups->unsupported_caps;
cfg->f_max = fixups->max_freq;
}
#endif
#ifdef OMAP_HSMMC_USE_GPIO
plat->cd_inverted = fdtdec_get_bool(fdt, node, "cd-inverted");
#endif
return 0;
}
#endif
#ifdef CONFIG_BLK
static int omap_hsmmc_bind(struct udevice *dev)
{
struct omap_hsmmc_plat *plat = dev_get_platdata(dev);
plat->mmc = calloc(1, sizeof(struct mmc));
return mmc_bind(dev, plat->mmc, &plat->cfg);
}
#endif
static int omap_hsmmc_probe(struct udevice *dev)
{
struct omap_hsmmc_plat *plat = dev_get_platdata(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct omap_hsmmc_data *priv = dev_get_priv(dev);
struct mmc_config *cfg = &plat->cfg;
struct mmc *mmc;
#ifdef CONFIG_IODELAY_RECALIBRATION
int ret;
#endif
cfg->name = "OMAP SD/MMC";
priv->base_addr = plat->base_addr;
priv->controller_flags = plat->controller_flags;
priv->hw_rev = plat->hw_rev;
#ifdef OMAP_HSMMC_USE_GPIO
priv->cd_inverted = plat->cd_inverted;
#endif
#ifdef CONFIG_BLK
mmc = plat->mmc;
#else
mmc = mmc_create(cfg, priv);
if (mmc == NULL)
return -1;
#endif
#if CONFIG_IS_ENABLED(DM_REGULATOR)
device_get_supply_regulator(dev, "pbias-supply",
&priv->pbias_supply);
#endif
#if defined(OMAP_HSMMC_USE_GPIO) && CONFIG_IS_ENABLED(OF_CONTROL)
gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio, GPIOD_IS_IN);
gpio_request_by_name(dev, "wp-gpios", 0, &priv->wp_gpio, GPIOD_IS_IN);
#endif
mmc->dev = dev;
upriv->mmc = mmc;
#ifdef CONFIG_IODELAY_RECALIBRATION
ret = omap_hsmmc_get_pinctrl_state(mmc);
/*
* disable high speed modes for the platforms that require IO delay
* and for which we don't have this information
*/
if ((ret < 0) &&
(priv->controller_flags & OMAP_HSMMC_REQUIRE_IODELAY)) {
priv->controller_flags &= ~OMAP_HSMMC_REQUIRE_IODELAY;
cfg->host_caps &= ~(MMC_CAP(MMC_HS_200) | MMC_CAP(MMC_DDR_52) |
UHS_CAPS);
}
#endif
return omap_hsmmc_init_setup(mmc);
}
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
static const struct omap_mmc_of_data dra7_mmc_of_data = {
.controller_flags = OMAP_HSMMC_REQUIRE_IODELAY,
};
static const struct udevice_id omap_hsmmc_ids[] = {
{ .compatible = "ti,omap3-hsmmc" },
{ .compatible = "ti,omap4-hsmmc" },
{ .compatible = "ti,am33xx-hsmmc" },
{ .compatible = "ti,dra7-hsmmc", .data = (ulong)&dra7_mmc_of_data },
{ }
};
#endif
U_BOOT_DRIVER(omap_hsmmc) = {
.name = "omap_hsmmc",
.id = UCLASS_MMC,
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
.of_match = omap_hsmmc_ids,
.ofdata_to_platdata = omap_hsmmc_ofdata_to_platdata,
.platdata_auto_alloc_size = sizeof(struct omap_hsmmc_plat),
#endif
#ifdef CONFIG_BLK
.bind = omap_hsmmc_bind,
#endif
.ops = &omap_hsmmc_ops,
.probe = omap_hsmmc_probe,
.priv_auto_alloc_size = sizeof(struct omap_hsmmc_data),
.flags = DM_FLAG_PRE_RELOC,
};
#endif