mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-12 22:33:18 +00:00
d890f23406
For the eMMC on ST-Ericsson Ux500v2 we need slightly different configuration values. Use the existing switch statement to match the peripheral ID of Ux500v2 (0x10480180) and override the necessary values to make the eMMC work on devices with ST-Ericsson Ux500. Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Stephan Gerhold <stephan@gerhold.net> Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com> Tested-by: Patrice Chotard <patrice.chotard@foss.st.com> on stm32f769-disco Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
551 lines
13 KiB
C
551 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* ARM PrimeCell MultiMedia Card Interface - PL180
|
|
*
|
|
* Copyright (C) ST-Ericsson SA 2010
|
|
*
|
|
* Author: Ulf Hansson <ulf.hansson@stericsson.com>
|
|
* Author: Martin Lundholm <martin.xa.lundholm@stericsson.com>
|
|
* Ported to drivers/mmc/ by: Matt Waddel <matt.waddel@linaro.org>
|
|
*/
|
|
|
|
/* #define DEBUG */
|
|
|
|
#include "common.h"
|
|
#include <clk.h>
|
|
#include <errno.h>
|
|
#include <log.h>
|
|
#include <malloc.h>
|
|
#include <mmc.h>
|
|
#include <dm/device_compat.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm-generic/gpio.h>
|
|
|
|
#include "arm_pl180_mmci.h"
|
|
#include <linux/delay.h>
|
|
|
|
#ifdef CONFIG_DM_MMC
|
|
#include <dm.h>
|
|
#define MMC_CLOCK_MAX 48000000
|
|
#define MMC_CLOCK_MIN 400000
|
|
|
|
struct arm_pl180_mmc_plat {
|
|
struct mmc_config cfg;
|
|
struct mmc mmc;
|
|
};
|
|
#endif
|
|
|
|
static int wait_for_command_end(struct mmc *dev, struct mmc_cmd *cmd)
|
|
{
|
|
u32 hoststatus, statusmask;
|
|
struct pl180_mmc_host *host = dev->priv;
|
|
|
|
statusmask = SDI_STA_CTIMEOUT | SDI_STA_CCRCFAIL;
|
|
if ((cmd->resp_type & MMC_RSP_PRESENT))
|
|
statusmask |= SDI_STA_CMDREND;
|
|
else
|
|
statusmask |= SDI_STA_CMDSENT;
|
|
|
|
do
|
|
hoststatus = readl(&host->base->status) & statusmask;
|
|
while (!hoststatus);
|
|
|
|
writel(statusmask, &host->base->status_clear);
|
|
if (hoststatus & SDI_STA_CTIMEOUT) {
|
|
debug("CMD%d time out\n", cmd->cmdidx);
|
|
return -ETIMEDOUT;
|
|
} else if ((hoststatus & SDI_STA_CCRCFAIL) &&
|
|
(cmd->resp_type & MMC_RSP_CRC)) {
|
|
printf("CMD%d CRC error\n", cmd->cmdidx);
|
|
return -EILSEQ;
|
|
}
|
|
|
|
if (cmd->resp_type & MMC_RSP_PRESENT) {
|
|
cmd->response[0] = readl(&host->base->response0);
|
|
cmd->response[1] = readl(&host->base->response1);
|
|
cmd->response[2] = readl(&host->base->response2);
|
|
cmd->response[3] = readl(&host->base->response3);
|
|
debug("CMD%d response[0]:0x%08X, response[1]:0x%08X, "
|
|
"response[2]:0x%08X, response[3]:0x%08X\n",
|
|
cmd->cmdidx, cmd->response[0], cmd->response[1],
|
|
cmd->response[2], cmd->response[3]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* send command to the mmc card and wait for results */
|
|
static int do_command(struct mmc *dev, struct mmc_cmd *cmd)
|
|
{
|
|
int result;
|
|
u32 sdi_cmd = 0;
|
|
struct pl180_mmc_host *host = dev->priv;
|
|
|
|
sdi_cmd = ((cmd->cmdidx & SDI_CMD_CMDINDEX_MASK) | SDI_CMD_CPSMEN);
|
|
|
|
if (cmd->resp_type) {
|
|
sdi_cmd |= SDI_CMD_WAITRESP;
|
|
if (cmd->resp_type & MMC_RSP_136)
|
|
sdi_cmd |= SDI_CMD_LONGRESP;
|
|
}
|
|
|
|
writel((u32)cmd->cmdarg, &host->base->argument);
|
|
udelay(COMMAND_REG_DELAY);
|
|
writel(sdi_cmd, &host->base->command);
|
|
result = wait_for_command_end(dev, cmd);
|
|
|
|
/* After CMD2 set RCA to a none zero value. */
|
|
if ((result == 0) && (cmd->cmdidx == MMC_CMD_ALL_SEND_CID))
|
|
dev->rca = 10;
|
|
|
|
/* After CMD3 open drain is switched off and push pull is used. */
|
|
if ((result == 0) && (cmd->cmdidx == MMC_CMD_SET_RELATIVE_ADDR)) {
|
|
u32 sdi_pwr = readl(&host->base->power) & ~SDI_PWR_OPD;
|
|
writel(sdi_pwr, &host->base->power);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static int read_bytes(struct mmc *dev, u32 *dest, u32 blkcount, u32 blksize)
|
|
{
|
|
u32 *tempbuff = dest;
|
|
u64 xfercount = blkcount * blksize;
|
|
struct pl180_mmc_host *host = dev->priv;
|
|
u32 status, status_err;
|
|
|
|
debug("read_bytes: blkcount=%u blksize=%u\n", blkcount, blksize);
|
|
|
|
status = readl(&host->base->status);
|
|
status_err = status & (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT |
|
|
SDI_STA_RXOVERR);
|
|
while ((!status_err) && (xfercount >= sizeof(u32))) {
|
|
if (status & SDI_STA_RXDAVL) {
|
|
*(tempbuff) = readl(&host->base->fifo);
|
|
tempbuff++;
|
|
xfercount -= sizeof(u32);
|
|
}
|
|
status = readl(&host->base->status);
|
|
status_err = status & (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT |
|
|
SDI_STA_RXOVERR);
|
|
}
|
|
|
|
status_err = status &
|
|
(SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT | SDI_STA_DBCKEND |
|
|
SDI_STA_RXOVERR);
|
|
while (!status_err) {
|
|
status = readl(&host->base->status);
|
|
status_err = status &
|
|
(SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT | SDI_STA_DBCKEND |
|
|
SDI_STA_RXOVERR);
|
|
}
|
|
|
|
if (status & SDI_STA_DTIMEOUT) {
|
|
printf("Read data timed out, xfercount: %llu, status: 0x%08X\n",
|
|
xfercount, status);
|
|
return -ETIMEDOUT;
|
|
} else if (status & SDI_STA_DCRCFAIL) {
|
|
printf("Read data bytes CRC error: 0x%x\n", status);
|
|
return -EILSEQ;
|
|
} else if (status & SDI_STA_RXOVERR) {
|
|
printf("Read data RX overflow error\n");
|
|
return -EIO;
|
|
}
|
|
|
|
writel(SDI_ICR_MASK, &host->base->status_clear);
|
|
|
|
if (xfercount) {
|
|
printf("Read data error, xfercount: %llu\n", xfercount);
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int write_bytes(struct mmc *dev, u32 *src, u32 blkcount, u32 blksize)
|
|
{
|
|
u32 *tempbuff = src;
|
|
int i;
|
|
u64 xfercount = blkcount * blksize;
|
|
struct pl180_mmc_host *host = dev->priv;
|
|
u32 status, status_err;
|
|
|
|
debug("write_bytes: blkcount=%u blksize=%u\n", blkcount, blksize);
|
|
|
|
status = readl(&host->base->status);
|
|
status_err = status & (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT);
|
|
while (!status_err && xfercount) {
|
|
if (status & SDI_STA_TXFIFOBW) {
|
|
if (xfercount >= SDI_FIFO_BURST_SIZE * sizeof(u32)) {
|
|
for (i = 0; i < SDI_FIFO_BURST_SIZE; i++)
|
|
writel(*(tempbuff + i),
|
|
&host->base->fifo);
|
|
tempbuff += SDI_FIFO_BURST_SIZE;
|
|
xfercount -= SDI_FIFO_BURST_SIZE * sizeof(u32);
|
|
} else {
|
|
while (xfercount >= sizeof(u32)) {
|
|
writel(*(tempbuff), &host->base->fifo);
|
|
tempbuff++;
|
|
xfercount -= sizeof(u32);
|
|
}
|
|
}
|
|
}
|
|
status = readl(&host->base->status);
|
|
status_err = status & (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT);
|
|
}
|
|
|
|
status_err = status &
|
|
(SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT | SDI_STA_DBCKEND);
|
|
while (!status_err) {
|
|
status = readl(&host->base->status);
|
|
status_err = status &
|
|
(SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT | SDI_STA_DBCKEND);
|
|
}
|
|
|
|
if (status & SDI_STA_DTIMEOUT) {
|
|
printf("Write data timed out, xfercount:%llu,status:0x%08X\n",
|
|
xfercount, status);
|
|
return -ETIMEDOUT;
|
|
} else if (status & SDI_STA_DCRCFAIL) {
|
|
printf("Write data CRC error\n");
|
|
return -EILSEQ;
|
|
}
|
|
|
|
writel(SDI_ICR_MASK, &host->base->status_clear);
|
|
|
|
if (xfercount) {
|
|
printf("Write data error, xfercount:%llu", xfercount);
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int do_data_transfer(struct mmc *dev,
|
|
struct mmc_cmd *cmd,
|
|
struct mmc_data *data)
|
|
{
|
|
int error = -ETIMEDOUT;
|
|
struct pl180_mmc_host *host = dev->priv;
|
|
u32 blksz = 0;
|
|
u32 data_ctrl = 0;
|
|
u32 data_len = (u32) (data->blocks * data->blocksize);
|
|
|
|
if (!host->version2) {
|
|
blksz = (ffs(data->blocksize) - 1);
|
|
data_ctrl |= ((blksz << 4) & SDI_DCTRL_DBLKSIZE_MASK);
|
|
} else {
|
|
blksz = data->blocksize;
|
|
data_ctrl |= (blksz << SDI_DCTRL_DBLOCKSIZE_V2_SHIFT);
|
|
}
|
|
data_ctrl |= SDI_DCTRL_DTEN | SDI_DCTRL_BUSYMODE;
|
|
|
|
writel(SDI_DTIMER_DEFAULT, &host->base->datatimer);
|
|
writel(data_len, &host->base->datalength);
|
|
udelay(DATA_REG_DELAY);
|
|
|
|
if (data->flags & MMC_DATA_READ) {
|
|
data_ctrl |= SDI_DCTRL_DTDIR_IN;
|
|
writel(data_ctrl, &host->base->datactrl);
|
|
|
|
error = do_command(dev, cmd);
|
|
if (error)
|
|
return error;
|
|
|
|
error = read_bytes(dev, (u32 *)data->dest, (u32)data->blocks,
|
|
(u32)data->blocksize);
|
|
} else if (data->flags & MMC_DATA_WRITE) {
|
|
error = do_command(dev, cmd);
|
|
if (error)
|
|
return error;
|
|
|
|
writel(data_ctrl, &host->base->datactrl);
|
|
error = write_bytes(dev, (u32 *)data->src, (u32)data->blocks,
|
|
(u32)data->blocksize);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static int host_request(struct mmc *dev,
|
|
struct mmc_cmd *cmd,
|
|
struct mmc_data *data)
|
|
{
|
|
int result;
|
|
|
|
if (data)
|
|
result = do_data_transfer(dev, cmd, data);
|
|
else
|
|
result = do_command(dev, cmd);
|
|
|
|
return result;
|
|
}
|
|
|
|
static int host_set_ios(struct mmc *dev)
|
|
{
|
|
struct pl180_mmc_host *host = dev->priv;
|
|
u32 sdi_clkcr;
|
|
|
|
sdi_clkcr = readl(&host->base->clock);
|
|
|
|
/* Ramp up the clock rate */
|
|
if (dev->clock) {
|
|
u32 clkdiv = 0;
|
|
u32 tmp_clock;
|
|
|
|
if (dev->clock >= dev->cfg->f_max) {
|
|
clkdiv = 0;
|
|
dev->clock = dev->cfg->f_max;
|
|
} else {
|
|
clkdiv = (host->clock_in / dev->clock) - 2;
|
|
}
|
|
|
|
tmp_clock = host->clock_in / (clkdiv + 2);
|
|
while (tmp_clock > dev->clock) {
|
|
clkdiv++;
|
|
tmp_clock = host->clock_in / (clkdiv + 2);
|
|
}
|
|
|
|
if (clkdiv > SDI_CLKCR_CLKDIV_MASK)
|
|
clkdiv = SDI_CLKCR_CLKDIV_MASK;
|
|
|
|
tmp_clock = host->clock_in / (clkdiv + 2);
|
|
dev->clock = tmp_clock;
|
|
sdi_clkcr &= ~(SDI_CLKCR_CLKDIV_MASK);
|
|
sdi_clkcr |= clkdiv;
|
|
}
|
|
|
|
/* Set the bus width */
|
|
if (dev->bus_width) {
|
|
u32 buswidth = 0;
|
|
|
|
switch (dev->bus_width) {
|
|
case 1:
|
|
buswidth |= SDI_CLKCR_WIDBUS_1;
|
|
break;
|
|
case 4:
|
|
buswidth |= SDI_CLKCR_WIDBUS_4;
|
|
break;
|
|
case 8:
|
|
buswidth |= SDI_CLKCR_WIDBUS_8;
|
|
break;
|
|
default:
|
|
printf("Invalid bus width: %d\n", dev->bus_width);
|
|
break;
|
|
}
|
|
sdi_clkcr &= ~(SDI_CLKCR_WIDBUS_MASK);
|
|
sdi_clkcr |= buswidth;
|
|
}
|
|
|
|
writel(sdi_clkcr, &host->base->clock);
|
|
udelay(CLK_CHANGE_DELAY);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifndef CONFIG_DM_MMC
|
|
/* MMC uses open drain drivers in the enumeration phase */
|
|
static int mmc_host_reset(struct mmc *dev)
|
|
{
|
|
struct pl180_mmc_host *host = dev->priv;
|
|
|
|
writel(host->pwr_init, &host->base->power);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct mmc_ops arm_pl180_mmci_ops = {
|
|
.send_cmd = host_request,
|
|
.set_ios = host_set_ios,
|
|
.init = mmc_host_reset,
|
|
};
|
|
|
|
/*
|
|
* mmc_host_init - initialize the mmc controller.
|
|
* Set initial clock and power for mmc slot.
|
|
* Initialize mmc struct and register with mmc framework.
|
|
*/
|
|
|
|
int arm_pl180_mmci_init(struct pl180_mmc_host *host, struct mmc **mmc)
|
|
{
|
|
u32 sdi_u32;
|
|
|
|
writel(host->pwr_init, &host->base->power);
|
|
writel(host->clkdiv_init, &host->base->clock);
|
|
udelay(CLK_CHANGE_DELAY);
|
|
|
|
/* Disable mmc interrupts */
|
|
sdi_u32 = readl(&host->base->mask0) & ~SDI_MASK0_MASK;
|
|
writel(sdi_u32, &host->base->mask0);
|
|
|
|
host->cfg.name = host->name;
|
|
host->cfg.ops = &arm_pl180_mmci_ops;
|
|
|
|
/* TODO remove the duplicates */
|
|
host->cfg.host_caps = host->caps;
|
|
host->cfg.voltages = host->voltages;
|
|
host->cfg.f_min = host->clock_min;
|
|
host->cfg.f_max = host->clock_max;
|
|
if (host->b_max != 0)
|
|
host->cfg.b_max = host->b_max;
|
|
else
|
|
host->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
|
|
|
|
*mmc = mmc_create(&host->cfg, host);
|
|
if (!*mmc)
|
|
return -1;
|
|
debug("registered mmc interface number is:%d\n",
|
|
(*mmc)->block_dev.devnum);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_DM_MMC
|
|
static void arm_pl180_mmc_init(struct pl180_mmc_host *host)
|
|
{
|
|
u32 sdi_u32;
|
|
|
|
writel(host->pwr_init, &host->base->power);
|
|
writel(host->clkdiv_init, &host->base->clock);
|
|
udelay(CLK_CHANGE_DELAY);
|
|
|
|
/* Disable mmc interrupts */
|
|
sdi_u32 = readl(&host->base->mask0) & ~SDI_MASK0_MASK;
|
|
writel(sdi_u32, &host->base->mask0);
|
|
}
|
|
|
|
static int arm_pl180_mmc_probe(struct udevice *dev)
|
|
{
|
|
struct arm_pl180_mmc_plat *pdata = dev_get_plat(dev);
|
|
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
|
|
struct mmc *mmc = &pdata->mmc;
|
|
struct pl180_mmc_host *host = dev_get_priv(dev);
|
|
struct mmc_config *cfg = &pdata->cfg;
|
|
struct clk clk;
|
|
u32 periphid;
|
|
int ret;
|
|
|
|
ret = clk_get_by_index(dev, 0, &clk);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = clk_enable(&clk);
|
|
if (ret) {
|
|
clk_free(&clk);
|
|
dev_err(dev, "failed to enable clock\n");
|
|
return ret;
|
|
}
|
|
|
|
host->pwr_init = INIT_PWR;
|
|
host->clkdiv_init = SDI_CLKCR_CLKDIV_INIT_V1 | SDI_CLKCR_CLKEN |
|
|
SDI_CLKCR_HWFC_EN;
|
|
host->clock_in = clk_get_rate(&clk);
|
|
|
|
cfg->name = dev->name;
|
|
cfg->voltages = VOLTAGE_WINDOW_SD;
|
|
cfg->host_caps = 0;
|
|
cfg->f_min = host->clock_in / (2 * (SDI_CLKCR_CLKDIV_INIT_V1 + 1));
|
|
cfg->f_max = MMC_CLOCK_MAX;
|
|
cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
|
|
|
|
periphid = dev_read_u32_default(dev, "arm,primecell-periphid", 0);
|
|
switch (periphid) {
|
|
case STM32_MMCI_ID: /* stm32 variant */
|
|
host->version2 = false;
|
|
break;
|
|
case UX500V2_MMCI_ID:
|
|
host->pwr_init = SDI_PWR_OPD | SDI_PWR_PWRCTRL_ON;
|
|
host->clkdiv_init = SDI_CLKCR_CLKDIV_INIT_V2 | SDI_CLKCR_CLKEN |
|
|
SDI_CLKCR_HWFC_EN;
|
|
cfg->voltages = VOLTAGE_WINDOW_MMC;
|
|
cfg->f_min = host->clock_in / (2 + SDI_CLKCR_CLKDIV_INIT_V2);
|
|
host->version2 = true;
|
|
break;
|
|
default:
|
|
host->version2 = true;
|
|
}
|
|
|
|
gpio_request_by_name(dev, "cd-gpios", 0, &host->cd_gpio, GPIOD_IS_IN);
|
|
|
|
ret = mmc_of_parse(dev, cfg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
arm_pl180_mmc_init(host);
|
|
mmc->priv = host;
|
|
mmc->dev = dev;
|
|
upriv->mmc = mmc;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int arm_pl180_mmc_bind(struct udevice *dev)
|
|
{
|
|
struct arm_pl180_mmc_plat *plat = dev_get_plat(dev);
|
|
|
|
return mmc_bind(dev, &plat->mmc, &plat->cfg);
|
|
}
|
|
|
|
static int dm_host_request(struct udevice *dev, struct mmc_cmd *cmd,
|
|
struct mmc_data *data)
|
|
{
|
|
struct mmc *mmc = mmc_get_mmc_dev(dev);
|
|
|
|
return host_request(mmc, cmd, data);
|
|
}
|
|
|
|
static int dm_host_set_ios(struct udevice *dev)
|
|
{
|
|
struct mmc *mmc = mmc_get_mmc_dev(dev);
|
|
|
|
return host_set_ios(mmc);
|
|
}
|
|
|
|
static int dm_mmc_getcd(struct udevice *dev)
|
|
{
|
|
struct pl180_mmc_host *host = dev_get_priv(dev);
|
|
int value = 1;
|
|
|
|
if (dm_gpio_is_valid(&host->cd_gpio))
|
|
value = dm_gpio_get_value(&host->cd_gpio);
|
|
|
|
return value;
|
|
}
|
|
|
|
static const struct dm_mmc_ops arm_pl180_dm_mmc_ops = {
|
|
.send_cmd = dm_host_request,
|
|
.set_ios = dm_host_set_ios,
|
|
.get_cd = dm_mmc_getcd,
|
|
};
|
|
|
|
static int arm_pl180_mmc_of_to_plat(struct udevice *dev)
|
|
{
|
|
struct pl180_mmc_host *host = dev_get_priv(dev);
|
|
|
|
host->base = dev_read_addr_ptr(dev);
|
|
if (!host->base)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id arm_pl180_mmc_match[] = {
|
|
{ .compatible = "arm,pl180" },
|
|
{ .compatible = "arm,pl18x" },
|
|
{ /* sentinel */ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(arm_pl180_mmc) = {
|
|
.name = "arm_pl180_mmc",
|
|
.id = UCLASS_MMC,
|
|
.of_match = arm_pl180_mmc_match,
|
|
.ops = &arm_pl180_dm_mmc_ops,
|
|
.probe = arm_pl180_mmc_probe,
|
|
.of_to_plat = arm_pl180_mmc_of_to_plat,
|
|
.bind = arm_pl180_mmc_bind,
|
|
.priv_auto = sizeof(struct pl180_mmc_host),
|
|
.plat_auto = sizeof(struct arm_pl180_mmc_plat),
|
|
};
|
|
#endif
|