u-boot/drivers/mmc/sh_sdhi.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

905 lines
23 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* drivers/mmc/sh_sdhi.c
*
* SD/MMC driver for Renesas rmobile ARM SoCs.
*
* Copyright (C) 2011,2013-2017 Renesas Electronics Corporation
* Copyright (C) 2014 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
* Copyright (C) 2008-2009 Renesas Solutions Corp.
*/
#include <common.h>
#include <malloc.h>
#include <mmc.h>
#include <dm.h>
#include <linux/errno.h>
#include <linux/compat.h>
#include <linux/io.h>
#include <linux/sizes.h>
#include <asm/arch/rmobile.h>
#include <asm/arch/sh_sdhi.h>
#include <clk.h>
#define DRIVER_NAME "sh-sdhi"
struct sh_sdhi_host {
void __iomem *addr;
int ch;
int bus_shift;
unsigned long quirks;
unsigned char wait_int;
unsigned char sd_error;
unsigned char detect_waiting;
unsigned char app_cmd;
};
static inline void sh_sdhi_writeq(struct sh_sdhi_host *host, int reg, u64 val)
{
writeq(val, host->addr + (reg << host->bus_shift));
}
static inline u64 sh_sdhi_readq(struct sh_sdhi_host *host, int reg)
{
return readq(host->addr + (reg << host->bus_shift));
}
static inline void sh_sdhi_writew(struct sh_sdhi_host *host, int reg, u16 val)
{
writew(val, host->addr + (reg << host->bus_shift));
}
static inline u16 sh_sdhi_readw(struct sh_sdhi_host *host, int reg)
{
return readw(host->addr + (reg << host->bus_shift));
}
static void sh_sdhi_detect(struct sh_sdhi_host *host)
{
sh_sdhi_writew(host, SDHI_OPTION,
OPT_BUS_WIDTH_1 | sh_sdhi_readw(host, SDHI_OPTION));
host->detect_waiting = 0;
}
static int sh_sdhi_intr(void *dev_id)
{
struct sh_sdhi_host *host = dev_id;
int state1 = 0, state2 = 0;
state1 = sh_sdhi_readw(host, SDHI_INFO1);
state2 = sh_sdhi_readw(host, SDHI_INFO2);
debug("%s: state1 = %x, state2 = %x\n", __func__, state1, state2);
/* CARD Insert */
if (state1 & INFO1_CARD_IN) {
sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_CARD_IN);
if (!host->detect_waiting) {
host->detect_waiting = 1;
sh_sdhi_detect(host);
}
sh_sdhi_writew(host, SDHI_INFO1_MASK, INFO1M_RESP_END |
INFO1M_ACCESS_END | INFO1M_CARD_IN |
INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
return -EAGAIN;
}
/* CARD Removal */
if (state1 & INFO1_CARD_RE) {
sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_CARD_RE);
if (!host->detect_waiting) {
host->detect_waiting = 1;
sh_sdhi_detect(host);
}
sh_sdhi_writew(host, SDHI_INFO1_MASK, INFO1M_RESP_END |
INFO1M_ACCESS_END | INFO1M_CARD_RE |
INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
sh_sdhi_writew(host, SDHI_SDIO_INFO1_MASK, SDIO_INFO1M_ON);
sh_sdhi_writew(host, SDHI_SDIO_MODE, SDIO_MODE_OFF);
return -EAGAIN;
}
if (state2 & INFO2_ALL_ERR) {
sh_sdhi_writew(host, SDHI_INFO2,
(unsigned short)~(INFO2_ALL_ERR));
sh_sdhi_writew(host, SDHI_INFO2_MASK,
INFO2M_ALL_ERR |
sh_sdhi_readw(host, SDHI_INFO2_MASK));
host->sd_error = 1;
host->wait_int = 1;
return 0;
}
/* Respons End */
if (state1 & INFO1_RESP_END) {
sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_RESP_END);
sh_sdhi_writew(host, SDHI_INFO1_MASK,
INFO1M_RESP_END |
sh_sdhi_readw(host, SDHI_INFO1_MASK));
host->wait_int = 1;
return 0;
}
/* SD_BUF Read Enable */
if (state2 & INFO2_BRE_ENABLE) {
sh_sdhi_writew(host, SDHI_INFO2, ~INFO2_BRE_ENABLE);
sh_sdhi_writew(host, SDHI_INFO2_MASK,
INFO2M_BRE_ENABLE | INFO2M_BUF_ILL_READ |
sh_sdhi_readw(host, SDHI_INFO2_MASK));
host->wait_int = 1;
return 0;
}
/* SD_BUF Write Enable */
if (state2 & INFO2_BWE_ENABLE) {
sh_sdhi_writew(host, SDHI_INFO2, ~INFO2_BWE_ENABLE);
sh_sdhi_writew(host, SDHI_INFO2_MASK,
INFO2_BWE_ENABLE | INFO2M_BUF_ILL_WRITE |
sh_sdhi_readw(host, SDHI_INFO2_MASK));
host->wait_int = 1;
return 0;
}
/* Access End */
if (state1 & INFO1_ACCESS_END) {
sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_ACCESS_END);
sh_sdhi_writew(host, SDHI_INFO1_MASK,
INFO1_ACCESS_END |
sh_sdhi_readw(host, SDHI_INFO1_MASK));
host->wait_int = 1;
return 0;
}
return -EAGAIN;
}
static int sh_sdhi_wait_interrupt_flag(struct sh_sdhi_host *host)
{
int timeout = 10000000;
while (1) {
timeout--;
if (timeout < 0) {
debug(DRIVER_NAME": %s timeout\n", __func__);
return 0;
}
if (!sh_sdhi_intr(host))
break;
udelay(1); /* 1 usec */
}
return 1; /* Return value: NOT 0 = complete waiting */
}
static int sh_sdhi_clock_control(struct sh_sdhi_host *host, unsigned long clk)
{
u32 clkdiv, i, timeout;
if (sh_sdhi_readw(host, SDHI_INFO2) & (1 << 14)) {
printf(DRIVER_NAME": Busy state ! Cannot change the clock\n");
return -EBUSY;
}
sh_sdhi_writew(host, SDHI_CLK_CTRL,
~CLK_ENABLE & sh_sdhi_readw(host, SDHI_CLK_CTRL));
if (clk == 0)
return -EIO;
clkdiv = 0x80;
i = CONFIG_SH_SDHI_FREQ >> (0x8 + 1);
for (; clkdiv && clk >= (i << 1); (clkdiv >>= 1))
i <<= 1;
sh_sdhi_writew(host, SDHI_CLK_CTRL, clkdiv);
timeout = 100000;
/* Waiting for SD Bus busy to be cleared */
while (timeout--) {
if ((sh_sdhi_readw(host, SDHI_INFO2) & 0x2000))
break;
}
if (timeout)
sh_sdhi_writew(host, SDHI_CLK_CTRL,
CLK_ENABLE | sh_sdhi_readw(host, SDHI_CLK_CTRL));
else
return -EBUSY;
return 0;
}
static int sh_sdhi_sync_reset(struct sh_sdhi_host *host)
{
u32 timeout;
sh_sdhi_writew(host, SDHI_SOFT_RST, SOFT_RST_ON);
sh_sdhi_writew(host, SDHI_SOFT_RST, SOFT_RST_OFF);
sh_sdhi_writew(host, SDHI_CLK_CTRL,
CLK_ENABLE | sh_sdhi_readw(host, SDHI_CLK_CTRL));
timeout = 100000;
while (timeout--) {
if (!(sh_sdhi_readw(host, SDHI_INFO2) & INFO2_CBUSY))
break;
udelay(100);
}
if (!timeout)
return -EBUSY;
if (host->quirks & SH_SDHI_QUIRK_16BIT_BUF)
sh_sdhi_writew(host, SDHI_HOST_MODE, 1);
return 0;
}
static int sh_sdhi_error_manage(struct sh_sdhi_host *host)
{
unsigned short e_state1, e_state2;
int ret;
host->sd_error = 0;
host->wait_int = 0;
e_state1 = sh_sdhi_readw(host, SDHI_ERR_STS1);
e_state2 = sh_sdhi_readw(host, SDHI_ERR_STS2);
if (e_state2 & ERR_STS2_SYS_ERROR) {
if (e_state2 & ERR_STS2_RES_STOP_TIMEOUT)
ret = -ETIMEDOUT;
else
ret = -EILSEQ;
debug("%s: ERR_STS2 = %04x\n",
DRIVER_NAME, sh_sdhi_readw(host, SDHI_ERR_STS2));
sh_sdhi_sync_reset(host);
sh_sdhi_writew(host, SDHI_INFO1_MASK,
INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
return ret;
}
if (e_state1 & ERR_STS1_CRC_ERROR || e_state1 & ERR_STS1_CMD_ERROR)
ret = -EILSEQ;
else
ret = -ETIMEDOUT;
debug("%s: ERR_STS1 = %04x\n",
DRIVER_NAME, sh_sdhi_readw(host, SDHI_ERR_STS1));
sh_sdhi_sync_reset(host);
sh_sdhi_writew(host, SDHI_INFO1_MASK,
INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
return ret;
}
static int sh_sdhi_single_read(struct sh_sdhi_host *host, struct mmc_data *data)
{
long time;
unsigned short blocksize, i;
unsigned short *p = (unsigned short *)data->dest;
u64 *q = (u64 *)data->dest;
if ((unsigned long)p & 0x00000001) {
debug(DRIVER_NAME": %s: The data pointer is unaligned.",
__func__);
return -EIO;
}
host->wait_int = 0;
sh_sdhi_writew(host, SDHI_INFO2_MASK,
~(INFO2M_BRE_ENABLE | INFO2M_BUF_ILL_READ) &
sh_sdhi_readw(host, SDHI_INFO2_MASK));
sh_sdhi_writew(host, SDHI_INFO1_MASK,
~INFO1M_ACCESS_END &
sh_sdhi_readw(host, SDHI_INFO1_MASK));
time = sh_sdhi_wait_interrupt_flag(host);
if (time == 0 || host->sd_error != 0)
return sh_sdhi_error_manage(host);
host->wait_int = 0;
blocksize = sh_sdhi_readw(host, SDHI_SIZE);
if (host->quirks & SH_SDHI_QUIRK_64BIT_BUF)
for (i = 0; i < blocksize / 8; i++)
*q++ = sh_sdhi_readq(host, SDHI_BUF0);
else
for (i = 0; i < blocksize / 2; i++)
*p++ = sh_sdhi_readw(host, SDHI_BUF0);
time = sh_sdhi_wait_interrupt_flag(host);
if (time == 0 || host->sd_error != 0)
return sh_sdhi_error_manage(host);
host->wait_int = 0;
return 0;
}
static int sh_sdhi_multi_read(struct sh_sdhi_host *host, struct mmc_data *data)
{
long time;
unsigned short blocksize, i, sec;
unsigned short *p = (unsigned short *)data->dest;
u64 *q = (u64 *)data->dest;
if ((unsigned long)p & 0x00000001) {
debug(DRIVER_NAME": %s: The data pointer is unaligned.",
__func__);
return -EIO;
}
debug("%s: blocks = %d, blocksize = %d\n",
__func__, data->blocks, data->blocksize);
host->wait_int = 0;
for (sec = 0; sec < data->blocks; sec++) {
sh_sdhi_writew(host, SDHI_INFO2_MASK,
~(INFO2M_BRE_ENABLE | INFO2M_BUF_ILL_READ) &
sh_sdhi_readw(host, SDHI_INFO2_MASK));
time = sh_sdhi_wait_interrupt_flag(host);
if (time == 0 || host->sd_error != 0)
return sh_sdhi_error_manage(host);
host->wait_int = 0;
blocksize = sh_sdhi_readw(host, SDHI_SIZE);
if (host->quirks & SH_SDHI_QUIRK_64BIT_BUF)
for (i = 0; i < blocksize / 8; i++)
*q++ = sh_sdhi_readq(host, SDHI_BUF0);
else
for (i = 0; i < blocksize / 2; i++)
*p++ = sh_sdhi_readw(host, SDHI_BUF0);
}
return 0;
}
static int sh_sdhi_single_write(struct sh_sdhi_host *host,
struct mmc_data *data)
{
long time;
unsigned short blocksize, i;
const unsigned short *p = (const unsigned short *)data->src;
const u64 *q = (const u64 *)data->src;
if ((unsigned long)p & 0x00000001) {
debug(DRIVER_NAME": %s: The data pointer is unaligned.",
__func__);
return -EIO;
}
debug("%s: blocks = %d, blocksize = %d\n",
__func__, data->blocks, data->blocksize);
host->wait_int = 0;
sh_sdhi_writew(host, SDHI_INFO2_MASK,
~(INFO2M_BWE_ENABLE | INFO2M_BUF_ILL_WRITE) &
sh_sdhi_readw(host, SDHI_INFO2_MASK));
sh_sdhi_writew(host, SDHI_INFO1_MASK,
~INFO1M_ACCESS_END &
sh_sdhi_readw(host, SDHI_INFO1_MASK));
time = sh_sdhi_wait_interrupt_flag(host);
if (time == 0 || host->sd_error != 0)
return sh_sdhi_error_manage(host);
host->wait_int = 0;
blocksize = sh_sdhi_readw(host, SDHI_SIZE);
if (host->quirks & SH_SDHI_QUIRK_64BIT_BUF)
for (i = 0; i < blocksize / 8; i++)
sh_sdhi_writeq(host, SDHI_BUF0, *q++);
else
for (i = 0; i < blocksize / 2; i++)
sh_sdhi_writew(host, SDHI_BUF0, *p++);
time = sh_sdhi_wait_interrupt_flag(host);
if (time == 0 || host->sd_error != 0)
return sh_sdhi_error_manage(host);
host->wait_int = 0;
return 0;
}
static int sh_sdhi_multi_write(struct sh_sdhi_host *host, struct mmc_data *data)
{
long time;
unsigned short i, sec, blocksize;
const unsigned short *p = (const unsigned short *)data->src;
const u64 *q = (const u64 *)data->src;
debug("%s: blocks = %d, blocksize = %d\n",
__func__, data->blocks, data->blocksize);
host->wait_int = 0;
for (sec = 0; sec < data->blocks; sec++) {
sh_sdhi_writew(host, SDHI_INFO2_MASK,
~(INFO2M_BWE_ENABLE | INFO2M_BUF_ILL_WRITE) &
sh_sdhi_readw(host, SDHI_INFO2_MASK));
time = sh_sdhi_wait_interrupt_flag(host);
if (time == 0 || host->sd_error != 0)
return sh_sdhi_error_manage(host);
host->wait_int = 0;
blocksize = sh_sdhi_readw(host, SDHI_SIZE);
if (host->quirks & SH_SDHI_QUIRK_64BIT_BUF)
for (i = 0; i < blocksize / 8; i++)
sh_sdhi_writeq(host, SDHI_BUF0, *q++);
else
for (i = 0; i < blocksize / 2; i++)
sh_sdhi_writew(host, SDHI_BUF0, *p++);
}
return 0;
}
static void sh_sdhi_get_response(struct sh_sdhi_host *host, struct mmc_cmd *cmd)
{
unsigned short i, j, cnt = 1;
unsigned short resp[8];
if (cmd->resp_type & MMC_RSP_136) {
cnt = 4;
resp[0] = sh_sdhi_readw(host, SDHI_RSP00);
resp[1] = sh_sdhi_readw(host, SDHI_RSP01);
resp[2] = sh_sdhi_readw(host, SDHI_RSP02);
resp[3] = sh_sdhi_readw(host, SDHI_RSP03);
resp[4] = sh_sdhi_readw(host, SDHI_RSP04);
resp[5] = sh_sdhi_readw(host, SDHI_RSP05);
resp[6] = sh_sdhi_readw(host, SDHI_RSP06);
resp[7] = sh_sdhi_readw(host, SDHI_RSP07);
/* SDHI REGISTER SPECIFICATION */
for (i = 7, j = 6; i > 0; i--) {
resp[i] = (resp[i] << 8) & 0xff00;
resp[i] |= (resp[j--] >> 8) & 0x00ff;
}
resp[0] = (resp[0] << 8) & 0xff00;
} else {
resp[0] = sh_sdhi_readw(host, SDHI_RSP00);
resp[1] = sh_sdhi_readw(host, SDHI_RSP01);
}
#if defined(__BIG_ENDIAN_BITFIELD)
if (cnt == 4) {
cmd->response[0] = (resp[6] << 16) | resp[7];
cmd->response[1] = (resp[4] << 16) | resp[5];
cmd->response[2] = (resp[2] << 16) | resp[3];
cmd->response[3] = (resp[0] << 16) | resp[1];
} else {
cmd->response[0] = (resp[0] << 16) | resp[1];
}
#else
if (cnt == 4) {
cmd->response[0] = (resp[7] << 16) | resp[6];
cmd->response[1] = (resp[5] << 16) | resp[4];
cmd->response[2] = (resp[3] << 16) | resp[2];
cmd->response[3] = (resp[1] << 16) | resp[0];
} else {
cmd->response[0] = (resp[1] << 16) | resp[0];
}
#endif /* __BIG_ENDIAN_BITFIELD */
}
static unsigned short sh_sdhi_set_cmd(struct sh_sdhi_host *host,
struct mmc_data *data, unsigned short opc)
{
if (host->app_cmd) {
if (!data)
host->app_cmd = 0;
return opc | BIT(6);
}
switch (opc) {
case MMC_CMD_SWITCH:
return opc | (data ? 0x1c00 : 0x40);
case MMC_CMD_SEND_EXT_CSD:
return opc | (data ? 0x1c00 : 0);
case MMC_CMD_SEND_OP_COND:
return opc | 0x0700;
case MMC_CMD_APP_CMD:
host->app_cmd = 1;
default:
return opc;
}
}
static unsigned short sh_sdhi_data_trans(struct sh_sdhi_host *host,
struct mmc_data *data, unsigned short opc)
{
if (host->app_cmd) {
host->app_cmd = 0;
switch (opc) {
case SD_CMD_APP_SEND_SCR:
case SD_CMD_APP_SD_STATUS:
return sh_sdhi_single_read(host, data);
default:
printf(DRIVER_NAME": SD: NOT SUPPORT APP CMD = d'%04d\n",
opc);
return -EINVAL;
}
} else {
switch (opc) {
case MMC_CMD_WRITE_MULTIPLE_BLOCK:
return sh_sdhi_multi_write(host, data);
case MMC_CMD_READ_MULTIPLE_BLOCK:
return sh_sdhi_multi_read(host, data);
case MMC_CMD_WRITE_SINGLE_BLOCK:
return sh_sdhi_single_write(host, data);
case MMC_CMD_READ_SINGLE_BLOCK:
case MMC_CMD_SWITCH:
case MMC_CMD_SEND_EXT_CSD:;
return sh_sdhi_single_read(host, data);
default:
printf(DRIVER_NAME": SD: NOT SUPPORT CMD = d'%04d\n", opc);
return -EINVAL;
}
}
}
static int sh_sdhi_start_cmd(struct sh_sdhi_host *host,
struct mmc_data *data, struct mmc_cmd *cmd)
{
long time;
unsigned short shcmd, opc = cmd->cmdidx;
int ret = 0;
unsigned long timeout;
debug("opc = %d, arg = %x, resp_type = %x\n",
opc, cmd->cmdarg, cmd->resp_type);
if (opc == MMC_CMD_STOP_TRANSMISSION) {
/* SDHI sends the STOP command automatically by STOP reg */
sh_sdhi_writew(host, SDHI_INFO1_MASK, ~INFO1M_ACCESS_END &
sh_sdhi_readw(host, SDHI_INFO1_MASK));
time = sh_sdhi_wait_interrupt_flag(host);
if (time == 0 || host->sd_error != 0)
return sh_sdhi_error_manage(host);
sh_sdhi_get_response(host, cmd);
return 0;
}
if (data) {
if ((opc == MMC_CMD_READ_MULTIPLE_BLOCK) ||
opc == MMC_CMD_WRITE_MULTIPLE_BLOCK) {
sh_sdhi_writew(host, SDHI_STOP, STOP_SEC_ENABLE);
sh_sdhi_writew(host, SDHI_SECCNT, data->blocks);
}
sh_sdhi_writew(host, SDHI_SIZE, data->blocksize);
}
shcmd = sh_sdhi_set_cmd(host, data, opc);
/*
* U-Boot cannot use interrupt.
* So this flag may not be clear by timing
*/
sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_RESP_END);
sh_sdhi_writew(host, SDHI_INFO1_MASK,
INFO1M_RESP_END | sh_sdhi_readw(host, SDHI_INFO1_MASK));
sh_sdhi_writew(host, SDHI_ARG0,
(unsigned short)(cmd->cmdarg & ARG0_MASK));
sh_sdhi_writew(host, SDHI_ARG1,
(unsigned short)((cmd->cmdarg >> 16) & ARG1_MASK));
timeout = 100000;
/* Waiting for SD Bus busy to be cleared */
while (timeout--) {
if ((sh_sdhi_readw(host, SDHI_INFO2) & 0x2000))
break;
}
host->wait_int = 0;
sh_sdhi_writew(host, SDHI_INFO1_MASK,
~INFO1M_RESP_END & sh_sdhi_readw(host, SDHI_INFO1_MASK));
sh_sdhi_writew(host, SDHI_INFO2_MASK,
~(INFO2M_CMD_ERROR | INFO2M_CRC_ERROR |
INFO2M_END_ERROR | INFO2M_TIMEOUT |
INFO2M_RESP_TIMEOUT | INFO2M_ILA) &
sh_sdhi_readw(host, SDHI_INFO2_MASK));
sh_sdhi_writew(host, SDHI_CMD, (unsigned short)(shcmd & CMD_MASK));
time = sh_sdhi_wait_interrupt_flag(host);
if (!time) {
host->app_cmd = 0;
return sh_sdhi_error_manage(host);
}
if (host->sd_error) {
switch (cmd->cmdidx) {
case MMC_CMD_ALL_SEND_CID:
case MMC_CMD_SELECT_CARD:
case SD_CMD_SEND_IF_COND:
case MMC_CMD_APP_CMD:
ret = -ETIMEDOUT;
break;
default:
debug(DRIVER_NAME": Cmd(d'%d) err\n", opc);
debug(DRIVER_NAME": cmdidx = %d\n", cmd->cmdidx);
ret = sh_sdhi_error_manage(host);
break;
}
host->sd_error = 0;
host->wait_int = 0;
host->app_cmd = 0;
return ret;
}
if (sh_sdhi_readw(host, SDHI_INFO1) & INFO1_RESP_END) {
host->app_cmd = 0;
return -EINVAL;
}
if (host->wait_int) {
sh_sdhi_get_response(host, cmd);
host->wait_int = 0;
}
if (data)
ret = sh_sdhi_data_trans(host, data, opc);
debug("ret = %d, resp = %08x, %08x, %08x, %08x\n",
ret, cmd->response[0], cmd->response[1],
cmd->response[2], cmd->response[3]);
return ret;
}
static int sh_sdhi_send_cmd_common(struct sh_sdhi_host *host,
struct mmc_cmd *cmd, struct mmc_data *data)
{
host->sd_error = 0;
return sh_sdhi_start_cmd(host, data, cmd);
}
static int sh_sdhi_set_ios_common(struct sh_sdhi_host *host, struct mmc *mmc)
{
int ret;
ret = sh_sdhi_clock_control(host, mmc->clock);
if (ret)
return -EINVAL;
if (mmc->bus_width == 8)
sh_sdhi_writew(host, SDHI_OPTION,
OPT_BUS_WIDTH_8 | (~OPT_BUS_WIDTH_M &
sh_sdhi_readw(host, SDHI_OPTION)));
else if (mmc->bus_width == 4)
sh_sdhi_writew(host, SDHI_OPTION,
OPT_BUS_WIDTH_4 | (~OPT_BUS_WIDTH_M &
sh_sdhi_readw(host, SDHI_OPTION)));
else
sh_sdhi_writew(host, SDHI_OPTION,
OPT_BUS_WIDTH_1 | (~OPT_BUS_WIDTH_M &
sh_sdhi_readw(host, SDHI_OPTION)));
debug("clock = %d, buswidth = %d\n", mmc->clock, mmc->bus_width);
return 0;
}
static int sh_sdhi_initialize_common(struct sh_sdhi_host *host)
{
int ret = sh_sdhi_sync_reset(host);
sh_sdhi_writew(host, SDHI_PORTSEL, USE_1PORT);
#if defined(__BIG_ENDIAN_BITFIELD)
sh_sdhi_writew(host, SDHI_EXT_SWAP, SET_SWAP);
#endif
sh_sdhi_writew(host, SDHI_INFO1_MASK, INFO1M_RESP_END |
INFO1M_ACCESS_END | INFO1M_CARD_RE |
INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
return ret;
}
#ifndef CONFIG_DM_MMC
static void *mmc_priv(struct mmc *mmc)
{
return (void *)mmc->priv;
}
static int sh_sdhi_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
struct mmc_data *data)
{
struct sh_sdhi_host *host = mmc_priv(mmc);
return sh_sdhi_send_cmd_common(host, cmd, data);
}
static int sh_sdhi_set_ios(struct mmc *mmc)
{
struct sh_sdhi_host *host = mmc_priv(mmc);
return sh_sdhi_set_ios_common(host, mmc);
}
static int sh_sdhi_initialize(struct mmc *mmc)
{
struct sh_sdhi_host *host = mmc_priv(mmc);
return sh_sdhi_initialize_common(host);
}
static const struct mmc_ops sh_sdhi_ops = {
.send_cmd = sh_sdhi_send_cmd,
.set_ios = sh_sdhi_set_ios,
.init = sh_sdhi_initialize,
};
#ifdef CONFIG_RCAR_GEN3
static struct mmc_config sh_sdhi_cfg = {
.name = DRIVER_NAME,
.ops = &sh_sdhi_ops,
.f_min = CLKDEV_INIT,
.f_max = CLKDEV_HS_DATA,
.voltages = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34,
.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT | MMC_MODE_HS |
MMC_MODE_HS_52MHz,
.part_type = PART_TYPE_DOS,
.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT,
};
#else
static struct mmc_config sh_sdhi_cfg = {
.name = DRIVER_NAME,
.ops = &sh_sdhi_ops,
.f_min = CLKDEV_INIT,
.f_max = CLKDEV_HS_DATA,
.voltages = MMC_VDD_32_33 | MMC_VDD_33_34,
.host_caps = MMC_MODE_4BIT | MMC_MODE_HS,
.part_type = PART_TYPE_DOS,
.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT,
};
#endif
int sh_sdhi_init(unsigned long addr, int ch, unsigned long quirks)
{
int ret = 0;
struct mmc *mmc;
struct sh_sdhi_host *host = NULL;
if (ch >= CONFIG_SYS_SH_SDHI_NR_CHANNEL)
return -ENODEV;
host = malloc(sizeof(struct sh_sdhi_host));
if (!host)
return -ENOMEM;
mmc = mmc_create(&sh_sdhi_cfg, host);
if (!mmc) {
ret = -1;
goto error;
}
host->ch = ch;
host->addr = (void __iomem *)addr;
host->quirks = quirks;
if (host->quirks & SH_SDHI_QUIRK_64BIT_BUF)
host->bus_shift = 2;
else if (host->quirks & SH_SDHI_QUIRK_16BIT_BUF)
host->bus_shift = 1;
return ret;
error:
if (host)
free(host);
return ret;
}
#else
struct sh_sdhi_plat {
struct mmc_config cfg;
struct mmc mmc;
};
int sh_sdhi_dm_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
struct mmc_data *data)
{
struct sh_sdhi_host *host = dev_get_priv(dev);
return sh_sdhi_send_cmd_common(host, cmd, data);
}
int sh_sdhi_dm_set_ios(struct udevice *dev)
{
struct sh_sdhi_host *host = dev_get_priv(dev);
struct mmc *mmc = mmc_get_mmc_dev(dev);
return sh_sdhi_set_ios_common(host, mmc);
}
static const struct dm_mmc_ops sh_sdhi_dm_ops = {
.send_cmd = sh_sdhi_dm_send_cmd,
.set_ios = sh_sdhi_dm_set_ios,
};
static int sh_sdhi_dm_bind(struct udevice *dev)
{
struct sh_sdhi_plat *plat = dev_get_platdata(dev);
return mmc_bind(dev, &plat->mmc, &plat->cfg);
}
static int sh_sdhi_dm_probe(struct udevice *dev)
{
struct sh_sdhi_plat *plat = dev_get_platdata(dev);
struct sh_sdhi_host *host = dev_get_priv(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct clk sh_sdhi_clk;
const u32 quirks = dev_get_driver_data(dev);
fdt_addr_t base;
int ret;
base = devfdt_get_addr(dev);
if (base == FDT_ADDR_T_NONE)
return -EINVAL;
host->addr = devm_ioremap(dev, base, SZ_2K);
if (!host->addr)
return -ENOMEM;
ret = clk_get_by_index(dev, 0, &sh_sdhi_clk);
if (ret) {
debug("failed to get clock, ret=%d\n", ret);
return ret;
}
ret = clk_enable(&sh_sdhi_clk);
if (ret) {
debug("failed to enable clock, ret=%d\n", ret);
return ret;
}
host->quirks = quirks;
if (host->quirks & SH_SDHI_QUIRK_64BIT_BUF)
host->bus_shift = 2;
else if (host->quirks & SH_SDHI_QUIRK_16BIT_BUF)
host->bus_shift = 1;
plat->cfg.name = dev->name;
plat->cfg.host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS;
switch (fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "bus-width",
1)) {
case 8:
plat->cfg.host_caps |= MMC_MODE_8BIT;
break;
case 4:
plat->cfg.host_caps |= MMC_MODE_4BIT;
break;
case 1:
break;
default:
dev_err(dev, "Invalid \"bus-width\" value\n");
return -EINVAL;
}
sh_sdhi_initialize_common(host);
plat->cfg.voltages = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34;
plat->cfg.f_min = CLKDEV_INIT;
plat->cfg.f_max = CLKDEV_HS_DATA;
plat->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
upriv->mmc = &plat->mmc;
return 0;
}
static const struct udevice_id sh_sdhi_sd_match[] = {
{ .compatible = "renesas,sdhi-r8a7795", .data = SH_SDHI_QUIRK_64BIT_BUF },
{ .compatible = "renesas,sdhi-r8a7796", .data = SH_SDHI_QUIRK_64BIT_BUF },
{ /* sentinel */ }
};
U_BOOT_DRIVER(sh_sdhi_mmc) = {
.name = "sh-sdhi-mmc",
.id = UCLASS_MMC,
.of_match = sh_sdhi_sd_match,
.bind = sh_sdhi_dm_bind,
.probe = sh_sdhi_dm_probe,
.priv_auto_alloc_size = sizeof(struct sh_sdhi_host),
.platdata_auto_alloc_size = sizeof(struct sh_sdhi_plat),
.ops = &sh_sdhi_dm_ops,
};
#endif