u-boot/drivers/mmc/omap_hsmmc.c

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/*
* (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 <mmc.h>
#include <part.h>
#include <i2c.h>
#include <twl4030.h>
#include <twl6030.h>
#include <palmas.h>
#include <asm/io.h>
#include <asm/arch/mmc_host_def.h>
#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>
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)
struct omap_hsmmc_data {
struct hsmmc *base_addr;
struct mmc_config cfg;
#ifdef OMAP_HSMMC_USE_GPIO
#ifdef CONFIG_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 we fail after 1 second wait, something is really bad */
#define MAX_RETRY_MS 1000
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);
#if defined(OMAP_HSMMC_USE_GPIO) && !defined(CONFIG_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)
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 (!(mmc->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)
/* PBIAS config needed for MMC1 only */
if (mmc->block_dev.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);
}
static int omap_hsmmc_init_setup(struct mmc *mmc)
{
struct hsmmc *mmc_base;
unsigned int reg_val;
unsigned int dsor;
ulong start;
mmc_base = ((struct omap_hsmmc_data *)mmc->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;
}
}
writel(DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0, &mmc_base->hctl);
writel(readl(&mmc_base->capa) | VS30_3V0SUP | VS18_1V8SUP,
&mmc_base->capa);
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 | CEN_DISABLE));
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);
writel(IE_BADA | IE_CERR | IE_DEB | IE_DCRC | IE_DTO | IE_CIE |
IE_CEB | IE_CCRC | IE_CTO | IE_BRR | IE_BWR | IE_TC | IE_CC,
&mmc_base->ie);
mmc_init_stream(mmc_base);
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 > MAX_RETRY_MS)
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;
}
}
}
static int omap_hsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
struct mmc_data *data)
{
struct hsmmc *mmc_base;
unsigned int flags, mmc_stat;
ulong start;
mmc_base = ((struct omap_hsmmc_data *)mmc->priv)->base_addr;
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 | ACEN_DISABLE | BCE_DISABLE | DE_DISABLE);
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);
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);
}
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(0) - 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);
}
}
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;
}
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;
}
static int omap_hsmmc_set_ios(struct mmc *mmc)
{
struct hsmmc *mmc_base;
unsigned int dsor = 0;
ulong start;
mmc_base = ((struct omap_hsmmc_data *)mmc->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;
}
/* configure clock with 96Mhz system clock.
*/
if (mmc->clock != 0) {
dsor = (MMC_CLOCK_REFERENCE * 1000000 / mmc->clock);
if ((MMC_CLOCK_REFERENCE * 1000000) / dsor > mmc->clock)
dsor++;
}
mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK),
(ICE_STOP | DTO_15THDTO | CEN_DISABLE));
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);
return 0;
}
#ifdef OMAP_HSMMC_USE_GPIO
#ifdef CONFIG_DM_MMC
static int omap_hsmmc_getcd(struct mmc *mmc)
{
struct omap_hsmmc_data *priv = mmc->priv;
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 mmc *mmc)
{
struct omap_hsmmc_data *priv = mmc->priv;
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_data = mmc->priv;
int cd_gpio;
/* if no CD return as 1 */
cd_gpio = priv_data->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_data = mmc->priv;
int wp_gpio;
/* if no WP return as 0 */
wp_gpio = priv_data->wp_gpio;
if (wp_gpio < 0)
return 0;
/* NOTE: assumes write protect signal is active-high */
return gpio_get_value(wp_gpio);
}
#endif
#endif
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
};
#ifndef CONFIG_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_data;
struct mmc_config *cfg;
uint host_caps_val;
priv_data = malloc(sizeof(*priv_data));
if (priv_data == NULL)
return -1;
host_caps_val = MMC_MODE_4BIT | MMC_MODE_HS_52MHz | MMC_MODE_HS;
switch (dev_index) {
case 0:
priv_data->base_addr = (struct hsmmc *)OMAP_HSMMC1_BASE;
break;
#ifdef OMAP_HSMMC2_BASE
case 1:
priv_data->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_data->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_data->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_data->cd_gpio = omap_mmc_setup_gpio_in(cd_gpio, "mmc_cd");
priv_data->wp_gpio = omap_mmc_setup_gpio_in(wp_gpio, "mmc_wp");
#endif
cfg = &priv_data->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_data);
if (mmc == NULL)
return -1;
return 0;
}
#else
static int omap_hsmmc_ofdata_to_platdata(struct udevice *dev)
{
struct omap_hsmmc_data *priv = dev_get_priv(dev);
const void *fdt = gd->fdt_blob;
int node = dev_of_offset(dev);
struct mmc_config *cfg;
int val;
priv->base_addr = map_physmem(dev_get_addr(dev), sizeof(struct hsmmc *),
MAP_NOCACHE);
cfg = &priv->cfg;
cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS;
val = fdtdec_get_int(fdt, node, "bus-width", -1);
if (val < 0) {
printf("error: bus-width property missing\n");
return -ENOENT;
}
switch (val) {
case 0x8:
cfg->host_caps |= MMC_MODE_8BIT;
case 0x4:
cfg->host_caps |= MMC_MODE_4BIT;
break;
default:
printf("error: invalid bus-width property\n");
return -ENOENT;
}
cfg->f_min = 400000;
cfg->f_max = fdtdec_get_int(fdt, node, "max-frequency", 52000000);
cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
#ifdef OMAP_HSMMC_USE_GPIO
priv->cd_inverted = fdtdec_get_bool(fdt, node, "cd-inverted");
#endif
return 0;
}
static int omap_hsmmc_probe(struct udevice *dev)
{
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct omap_hsmmc_data *priv = dev_get_priv(dev);
struct mmc_config *cfg;
struct mmc *mmc;
cfg = &priv->cfg;
cfg->name = "OMAP SD/MMC";
cfg->ops = &omap_hsmmc_ops;
mmc = mmc_create(cfg, priv);
if (mmc == NULL)
return -1;
#ifdef OMAP_HSMMC_USE_GPIO
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;
return 0;
}
static const struct udevice_id omap_hsmmc_ids[] = {
{ .compatible = "ti,omap3-hsmmc" },
{ .compatible = "ti,omap4-hsmmc" },
{ .compatible = "ti,am33xx-hsmmc" },
{ }
};
U_BOOT_DRIVER(omap_hsmmc) = {
.name = "omap_hsmmc",
.id = UCLASS_MMC,
.of_match = omap_hsmmc_ids,
.ofdata_to_platdata = omap_hsmmc_ofdata_to_platdata,
.probe = omap_hsmmc_probe,
.priv_auto_alloc_size = sizeof(struct omap_hsmmc_data),
};
#endif