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u-boot/drivers/mmc/tmio-common.c
Marek Vasut 1332bdc2df mmc: tmio: Disable 1/1024 clock divider on Renesas R-Car platforms 
The R-Car Gen3 SD_CLK_CTRL register does not use BIT(16) to implement
divider 1/1024, instead BIT(16) is reserved bit and divider 1/1024 is
not supported. The divider 1/1024 is specific to Socionext variant of
the IP, as is indicated by Linux commit:

0196c8db8363 ("mmc: tmio: move tmio_mmc_set_clock() to platform hook")
"
Socionext (and Panasonic) uses bit 10 (CLKSEL) for 1/1.  Also, newer
versions of UniPhier SoC variants use bit 16 for 1/1024.
"

Do not set the TMIO_SD_CAP_DIV1024 on Renesas R-Car platforms even if
the IP VERSION register does exist, and indicates IP version is newer
or equal to version 1.0 . The IP version 1.0 or newer does not imply
presence of the 1/1024 divider.

Since the TMIO driver is used exactly by two supported platforms, that
is Renesas R-Car and Socionext UniPhier, it is OK to check whether the
TMIO_SD_CAP_RCAR capability is not set to identify the UniPhier platform
and add the capability only on that platform.

Fixes: 58c35b17aa ("mmc: matsushita-common: Always check controller version")
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Acked-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Thuan Nguyen Hong <thuan.nguyen-hong@banvien.com.vn>
2023-10-27 11:21:28 +02:00

786 lines
19 KiB
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*/
#include <common.h>
#include <clk.h>
#include <cpu_func.h>
#include <fdtdec.h>
#include <mmc.h>
#include <dm.h>
#include <asm/global_data.h>
#include <dm/device_compat.h>
#include <dm/pinctrl.h>
#include <linux/compat.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/sizes.h>
#include <power/regulator.h>
#include <asm/unaligned.h>
#include "tmio-common.h"
DECLARE_GLOBAL_DATA_PTR;
static u64 tmio_sd_readq(struct tmio_sd_priv *priv, unsigned int reg)
{
return readq(priv->regbase + (reg << 1));
}
static void tmio_sd_writeq(struct tmio_sd_priv *priv,
u64 val, unsigned int reg)
{
writeq(val, priv->regbase + (reg << 1));
}
static u16 tmio_sd_readw(struct tmio_sd_priv *priv, unsigned int reg)
{
return readw(priv->regbase + (reg >> 1));
}
static void tmio_sd_writew(struct tmio_sd_priv *priv,
u16 val, unsigned int reg)
{
writew(val, priv->regbase + (reg >> 1));
}
u32 tmio_sd_readl(struct tmio_sd_priv *priv, unsigned int reg)
{
u32 val;
if (priv->caps & TMIO_SD_CAP_64BIT)
return readl(priv->regbase + (reg << 1));
else if (priv->caps & TMIO_SD_CAP_16BIT) {
val = readw(priv->regbase + (reg >> 1)) & 0xffff;
if ((reg == TMIO_SD_RSP10) || (reg == TMIO_SD_RSP32) ||
(reg == TMIO_SD_RSP54) || (reg == TMIO_SD_RSP76)) {
val |= readw(priv->regbase + (reg >> 1) + 2) << 16;
}
return val;
} else
return readl(priv->regbase + reg);
}
void tmio_sd_writel(struct tmio_sd_priv *priv,
u32 val, unsigned int reg)
{
if (priv->caps & TMIO_SD_CAP_64BIT)
writel(val, priv->regbase + (reg << 1));
else if (priv->caps & TMIO_SD_CAP_16BIT) {
writew(val & 0xffff, priv->regbase + (reg >> 1));
if (reg == TMIO_SD_INFO1 || reg == TMIO_SD_INFO1_MASK ||
reg == TMIO_SD_INFO2 || reg == TMIO_SD_INFO2_MASK ||
reg == TMIO_SD_ARG)
writew(val >> 16, priv->regbase + (reg >> 1) + 2);
} else
writel(val, priv->regbase + reg);
}
static int tmio_sd_check_error(struct udevice *dev, struct mmc_cmd *cmd)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
u32 info2 = tmio_sd_readl(priv, TMIO_SD_INFO2);
if (info2 & TMIO_SD_INFO2_ERR_RTO) {
/*
* TIMEOUT must be returned for unsupported command. Do not
* display error log since this might be a part of sequence to
* distinguish between SD and MMC.
*/
return -ETIMEDOUT;
}
if (info2 & TMIO_SD_INFO2_ERR_TO) {
dev_err(dev, "timeout error\n");
return -ETIMEDOUT;
}
if (info2 & (TMIO_SD_INFO2_ERR_END | TMIO_SD_INFO2_ERR_CRC |
TMIO_SD_INFO2_ERR_IDX)) {
if ((cmd->cmdidx != MMC_CMD_SEND_TUNING_BLOCK) &&
(cmd->cmdidx != MMC_CMD_SEND_TUNING_BLOCK_HS200))
dev_err(dev, "communication out of sync\n");
return -EILSEQ;
}
if (info2 & (TMIO_SD_INFO2_ERR_ILA | TMIO_SD_INFO2_ERR_ILR |
TMIO_SD_INFO2_ERR_ILW)) {
dev_err(dev, "illegal access\n");
return -EIO;
}
return 0;
}
static int tmio_sd_wait_for_irq(struct udevice *dev, struct mmc_cmd *cmd,
unsigned int reg, u32 flag)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
long wait = 1000000;
int ret;
while (true) {
if (tmio_sd_readl(priv, reg) & flag)
return tmio_sd_check_error(dev, cmd);
if (wait-- < 0) {
dev_err(dev, "timeout\n");
return -ETIMEDOUT;
}
ret = tmio_sd_check_error(dev, cmd);
if (ret)
return ret;
udelay(1);
}
return 0;
}
#define tmio_pio_read_fifo(__width, __suffix) \
static void tmio_pio_read_fifo_##__width(struct tmio_sd_priv *priv, \
char *pbuf, uint blksz) \
{ \
u##__width *buf = (u##__width *)pbuf; \
int i; \
\
if (likely(IS_ALIGNED((uintptr_t)buf, ((__width) / 8)))) { \
for (i = 0; i < blksz / ((__width) / 8); i++) { \
*buf++ = tmio_sd_read##__suffix(priv, \
TMIO_SD_BUF); \
} \
} else { \
for (i = 0; i < blksz / ((__width) / 8); i++) { \
u##__width data; \
data = tmio_sd_read##__suffix(priv, \
TMIO_SD_BUF); \
put_unaligned(data, buf++); \
} \
} \
}
tmio_pio_read_fifo(64, q)
tmio_pio_read_fifo(32, l)
tmio_pio_read_fifo(16, w)
static int tmio_sd_pio_read_one_block(struct udevice *dev, struct mmc_cmd *cmd,
char *pbuf, uint blocksize)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
int ret;
/* wait until the buffer is filled with data */
ret = tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO2,
TMIO_SD_INFO2_BRE);
if (ret)
return ret;
/*
* Clear the status flag _before_ read the buffer out because
* TMIO_SD_INFO2_BRE is edge-triggered, not level-triggered.
*/
tmio_sd_writel(priv, 0, TMIO_SD_INFO2);
if (priv->caps & TMIO_SD_CAP_64BIT)
tmio_pio_read_fifo_64(priv, pbuf, blocksize);
else if (priv->caps & TMIO_SD_CAP_16BIT)
tmio_pio_read_fifo_16(priv, pbuf, blocksize);
else
tmio_pio_read_fifo_32(priv, pbuf, blocksize);
return 0;
}
#define tmio_pio_write_fifo(__width, __suffix) \
static void tmio_pio_write_fifo_##__width(struct tmio_sd_priv *priv, \
const char *pbuf, uint blksz)\
{ \
const u##__width *buf = (const u##__width *)pbuf; \
int i; \
\
if (likely(IS_ALIGNED((uintptr_t)buf, ((__width) / 8)))) { \
for (i = 0; i < blksz / ((__width) / 8); i++) { \
tmio_sd_write##__suffix(priv, *buf++, \
TMIO_SD_BUF); \
} \
} else { \
for (i = 0; i < blksz / ((__width) / 8); i++) { \
u##__width data = get_unaligned(buf++); \
tmio_sd_write##__suffix(priv, data, \
TMIO_SD_BUF); \
} \
} \
}
tmio_pio_write_fifo(64, q)
tmio_pio_write_fifo(32, l)
tmio_pio_write_fifo(16, w)
static int tmio_sd_pio_write_one_block(struct udevice *dev, struct mmc_cmd *cmd,
const char *pbuf, uint blocksize)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
int ret;
/* wait until the buffer becomes empty */
ret = tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO2,
TMIO_SD_INFO2_BWE);
if (ret)
return ret;
tmio_sd_writel(priv, 0, TMIO_SD_INFO2);
if (priv->caps & TMIO_SD_CAP_64BIT)
tmio_pio_write_fifo_64(priv, pbuf, blocksize);
else if (priv->caps & TMIO_SD_CAP_16BIT)
tmio_pio_write_fifo_16(priv, pbuf, blocksize);
else
tmio_pio_write_fifo_32(priv, pbuf, blocksize);
return 0;
}
static int tmio_sd_pio_xfer(struct udevice *dev, struct mmc_cmd *cmd,
struct mmc_data *data)
{
const char *src = data->src;
char *dest = data->dest;
int i, ret;
for (i = 0; i < data->blocks; i++) {
if (data->flags & MMC_DATA_READ)
ret = tmio_sd_pio_read_one_block(dev, cmd, dest,
data->blocksize);
else
ret = tmio_sd_pio_write_one_block(dev, cmd, src,
data->blocksize);
if (ret)
return ret;
if (data->flags & MMC_DATA_READ)
dest += data->blocksize;
else
src += data->blocksize;
}
return 0;
}
static void tmio_sd_dma_start(struct tmio_sd_priv *priv,
dma_addr_t dma_addr)
{
u32 tmp;
tmio_sd_writel(priv, 0, TMIO_SD_DMA_INFO1);
tmio_sd_writel(priv, 0, TMIO_SD_DMA_INFO2);
/* enable DMA */
tmp = tmio_sd_readl(priv, TMIO_SD_EXTMODE);
tmp |= TMIO_SD_EXTMODE_DMA_EN;
tmio_sd_writel(priv, tmp, TMIO_SD_EXTMODE);
tmio_sd_writel(priv, dma_addr & U32_MAX, TMIO_SD_DMA_ADDR_L);
/* suppress the warning "right shift count >= width of type" */
dma_addr >>= min_t(int, 32, 8 * sizeof(dma_addr));
tmio_sd_writel(priv, dma_addr & U32_MAX, TMIO_SD_DMA_ADDR_H);
tmio_sd_writel(priv, TMIO_SD_DMA_CTL_START, TMIO_SD_DMA_CTL);
}
static int tmio_sd_dma_wait_for_irq(struct udevice *dev, u32 flag,
unsigned int blocks)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
long wait = 1000000 + 10 * blocks;
while (!(tmio_sd_readl(priv, TMIO_SD_DMA_INFO1) & flag)) {
if (wait-- < 0) {
dev_err(dev, "timeout during DMA\n");
return -ETIMEDOUT;
}
udelay(10);
}
if (tmio_sd_readl(priv, TMIO_SD_DMA_INFO2)) {
dev_err(dev, "error during DMA\n");
return -EIO;
}
return 0;
}
static int tmio_sd_dma_xfer(struct udevice *dev, struct mmc_data *data)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
size_t len = data->blocks * data->blocksize;
void *buf;
enum dma_data_direction dir;
dma_addr_t dma_addr;
u32 poll_flag, tmp;
int ret;
tmp = tmio_sd_readl(priv, TMIO_SD_DMA_MODE);
tmp |= priv->idma_bus_width;
if (data->flags & MMC_DATA_READ) {
buf = data->dest;
dir = DMA_FROM_DEVICE;
/*
* The DMA READ completion flag position differs on Socionext
* and Renesas SoCs. It is bit 20 on Socionext SoCs and using
* bit 17 is a hardware bug and forbidden. It is either bit 17
* or bit 20 on Renesas SoCs, depending on SoC.
*/
poll_flag = priv->read_poll_flag;
tmp |= TMIO_SD_DMA_MODE_DIR_RD;
} else {
buf = (void *)data->src;
dir = DMA_TO_DEVICE;
poll_flag = TMIO_SD_DMA_INFO1_END_WR;
tmp &= ~TMIO_SD_DMA_MODE_DIR_RD;
}
tmio_sd_writel(priv, tmp, TMIO_SD_DMA_MODE);
dma_addr = dma_map_single(buf, len, dir);
tmio_sd_dma_start(priv, dma_addr);
ret = tmio_sd_dma_wait_for_irq(dev, poll_flag, data->blocks);
if (poll_flag == TMIO_SD_DMA_INFO1_END_RD)
udelay(1);
dma_unmap_single(dma_addr, len, dir);
return ret;
}
/* check if the address is DMA'able */
static bool tmio_sd_addr_is_dmaable(struct mmc_data *data)
{
uintptr_t addr = (uintptr_t)data->src;
if (!IS_ALIGNED(addr, TMIO_SD_DMA_MINALIGN))
return false;
if (IS_ENABLED(CONFIG_RCAR_64)) {
if (!(data->flags & MMC_DATA_READ) && !IS_ALIGNED(addr, 128))
return false;
/* Gen3 DMA has 32bit limit */
if (sizeof(addr) > 4 && addr >> 32)
return false;
}
#ifdef CONFIG_SPL_BUILD
if (IS_ENABLED(CONFIG_ARCH_UNIPHIER) && !IS_ENABLED(CONFIG_ARM64)) {
/*
* For UniPhier ARMv7 SoCs, the stack is allocated in locked
* ways of L2, which is unreachable from the DMA engine.
*/
if (addr < CONFIG_SPL_STACK)
return false;
}
#endif
return true;
}
int tmio_sd_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
struct mmc_data *data)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
int ret;
u32 tmp;
if (tmio_sd_readl(priv, TMIO_SD_INFO2) & TMIO_SD_INFO2_CBSY) {
dev_err(dev, "command busy\n");
return -EBUSY;
}
/* clear all status flags */
tmio_sd_writel(priv, 0, TMIO_SD_INFO1);
tmio_sd_writel(priv, 0, TMIO_SD_INFO2);
/* disable DMA once */
tmp = tmio_sd_readl(priv, TMIO_SD_EXTMODE);
tmp &= ~TMIO_SD_EXTMODE_DMA_EN;
tmio_sd_writel(priv, tmp, TMIO_SD_EXTMODE);
tmio_sd_writel(priv, cmd->cmdarg, TMIO_SD_ARG);
tmp = cmd->cmdidx;
if (data) {
tmio_sd_writel(priv, data->blocksize, TMIO_SD_SIZE);
tmio_sd_writel(priv, data->blocks, TMIO_SD_SECCNT);
/* Do not send CMD12 automatically */
tmp |= TMIO_SD_CMD_NOSTOP | TMIO_SD_CMD_DATA;
if (data->blocks > 1)
tmp |= TMIO_SD_CMD_MULTI;
if (data->flags & MMC_DATA_READ)
tmp |= TMIO_SD_CMD_RD;
}
/*
* Do not use the response type auto-detection on this hardware.
* CMD8, for example, has different response types on SD and eMMC,
* while this controller always assumes the response type for SD.
* Set the response type manually.
*/
switch (cmd->resp_type) {
case MMC_RSP_NONE:
tmp |= TMIO_SD_CMD_RSP_NONE;
break;
case MMC_RSP_R1:
tmp |= TMIO_SD_CMD_RSP_R1;
break;
case MMC_RSP_R1b:
tmp |= TMIO_SD_CMD_RSP_R1B;
break;
case MMC_RSP_R2:
tmp |= TMIO_SD_CMD_RSP_R2;
break;
case MMC_RSP_R3:
tmp |= TMIO_SD_CMD_RSP_R3;
break;
default:
dev_err(dev, "unknown response type\n");
return -EINVAL;
}
dev_dbg(dev, "sending CMD%d (SD_CMD=%08x, SD_ARG=%08x)\n",
cmd->cmdidx, tmp, cmd->cmdarg);
tmio_sd_writel(priv, tmp, TMIO_SD_CMD);
ret = tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO1,
TMIO_SD_INFO1_RSP);
if (ret)
return ret;
if (cmd->resp_type & MMC_RSP_136) {
u32 rsp_127_104 = tmio_sd_readl(priv, TMIO_SD_RSP76);
u32 rsp_103_72 = tmio_sd_readl(priv, TMIO_SD_RSP54);
u32 rsp_71_40 = tmio_sd_readl(priv, TMIO_SD_RSP32);
u32 rsp_39_8 = tmio_sd_readl(priv, TMIO_SD_RSP10);
cmd->response[0] = ((rsp_127_104 & 0x00ffffff) << 8) |
((rsp_103_72 & 0xff000000) >> 24);
cmd->response[1] = ((rsp_103_72 & 0x00ffffff) << 8) |
((rsp_71_40 & 0xff000000) >> 24);
cmd->response[2] = ((rsp_71_40 & 0x00ffffff) << 8) |
((rsp_39_8 & 0xff000000) >> 24);
cmd->response[3] = (rsp_39_8 & 0xffffff) << 8;
} else {
/* bit 39-8 */
cmd->response[0] = tmio_sd_readl(priv, TMIO_SD_RSP10);
}
if (data) {
/* use DMA if the HW supports it and the buffer is aligned */
if (priv->caps & TMIO_SD_CAP_DMA_INTERNAL &&
tmio_sd_addr_is_dmaable(data))
ret = tmio_sd_dma_xfer(dev, data);
else
ret = tmio_sd_pio_xfer(dev, cmd, data);
if (ret)
return ret;
ret = tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO1,
TMIO_SD_INFO1_CMP);
if (ret)
return ret;
}
return tmio_sd_wait_for_irq(dev, cmd, TMIO_SD_INFO2,
TMIO_SD_INFO2_SCLKDIVEN);
}
static int tmio_sd_set_bus_width(struct tmio_sd_priv *priv,
struct mmc *mmc)
{
u32 val, tmp;
switch (mmc->bus_width) {
case 0:
case 1:
val = TMIO_SD_OPTION_WIDTH_1;
break;
case 4:
val = TMIO_SD_OPTION_WIDTH_4;
break;
case 8:
val = TMIO_SD_OPTION_WIDTH_8;
break;
default:
return -EINVAL;
}
tmp = tmio_sd_readl(priv, TMIO_SD_OPTION);
tmp &= ~TMIO_SD_OPTION_WIDTH_MASK;
tmp |= val;
tmio_sd_writel(priv, tmp, TMIO_SD_OPTION);
return 0;
}
static void tmio_sd_set_ddr_mode(struct tmio_sd_priv *priv,
struct mmc *mmc)
{
u32 tmp;
tmp = tmio_sd_readl(priv, TMIO_SD_IF_MODE);
if (mmc->ddr_mode)
tmp |= TMIO_SD_IF_MODE_DDR;
else
tmp &= ~TMIO_SD_IF_MODE_DDR;
tmio_sd_writel(priv, tmp, TMIO_SD_IF_MODE);
}
static ulong tmio_sd_clk_get_rate(struct tmio_sd_priv *priv)
{
return priv->clk_get_rate(priv);
}
static void tmio_sd_set_clk_rate(struct tmio_sd_priv *priv, struct mmc *mmc)
{
unsigned int divisor;
u32 tmp, val = 0;
ulong mclk;
if (mmc->clock) {
mclk = tmio_sd_clk_get_rate(priv);
divisor = DIV_ROUND_UP(mclk, mmc->clock);
/* Do not set divider to 0xff in DDR mode */
if (mmc->ddr_mode && (divisor == 1))
divisor = 2;
if (divisor <= 1)
val = (priv->caps & TMIO_SD_CAP_RCAR) ?
TMIO_SD_CLKCTL_RCAR_DIV1 : TMIO_SD_CLKCTL_DIV1;
else if (divisor <= 2)
val = TMIO_SD_CLKCTL_DIV2;
else if (divisor <= 4)
val = TMIO_SD_CLKCTL_DIV4;
else if (divisor <= 8)
val = TMIO_SD_CLKCTL_DIV8;
else if (divisor <= 16)
val = TMIO_SD_CLKCTL_DIV16;
else if (divisor <= 32)
val = TMIO_SD_CLKCTL_DIV32;
else if (divisor <= 64)
val = TMIO_SD_CLKCTL_DIV64;
else if (divisor <= 128)
val = TMIO_SD_CLKCTL_DIV128;
else if (divisor <= 256)
val = TMIO_SD_CLKCTL_DIV256;
else if (divisor <= 512 || !(priv->caps & TMIO_SD_CAP_DIV1024))
val = TMIO_SD_CLKCTL_DIV512;
else
val = TMIO_SD_CLKCTL_DIV1024;
}
tmp = tmio_sd_readl(priv, TMIO_SD_CLKCTL);
if (mmc->clock &&
!((tmp & TMIO_SD_CLKCTL_SCLKEN) &&
((tmp & TMIO_SD_CLKCTL_DIV_MASK) == val))) {
/*
* Stop the clock before changing its rate
* to avoid a glitch signal
*/
tmp &= ~TMIO_SD_CLKCTL_SCLKEN;
tmio_sd_writel(priv, tmp, TMIO_SD_CLKCTL);
/* Change the clock rate. */
tmp &= ~TMIO_SD_CLKCTL_DIV_MASK;
tmp |= val;
}
/* Enable or Disable the clock */
if (mmc->clk_disable) {
tmp |= TMIO_SD_CLKCTL_OFFEN;
tmp &= ~TMIO_SD_CLKCTL_SCLKEN;
} else {
tmp &= ~TMIO_SD_CLKCTL_OFFEN;
tmp |= TMIO_SD_CLKCTL_SCLKEN;
}
tmio_sd_writel(priv, tmp, TMIO_SD_CLKCTL);
udelay(1000);
}
static void tmio_sd_set_pins(struct udevice *dev)
{
__maybe_unused struct mmc *mmc = mmc_get_mmc_dev(dev);
struct tmio_sd_priv *priv = dev_get_priv(dev);
if (CONFIG_IS_ENABLED(DM_REGULATOR) && priv->vqmmc_dev) {
if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
regulator_set_value(priv->vqmmc_dev, 1800000);
else
regulator_set_value(priv->vqmmc_dev, 3300000);
regulator_set_enable(priv->vqmmc_dev, true);
}
if (CONFIG_IS_ENABLED(PINCTRL)) {
if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
pinctrl_select_state(dev, "state_uhs");
else
pinctrl_select_state(dev, "default");
}
}
int tmio_sd_set_ios(struct udevice *dev)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
struct mmc *mmc = mmc_get_mmc_dev(dev);
int ret;
dev_dbg(dev, "clock %uHz, DDRmode %d, width %u\n",
mmc->clock, mmc->ddr_mode, mmc->bus_width);
tmio_sd_set_clk_rate(priv, mmc);
ret = tmio_sd_set_bus_width(priv, mmc);
if (ret)
return ret;
tmio_sd_set_ddr_mode(priv, mmc);
tmio_sd_set_pins(dev);
return 0;
}
int tmio_sd_get_cd(struct udevice *dev)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
if (priv->caps & TMIO_SD_CAP_NONREMOVABLE)
return 1;
return !!(tmio_sd_readl(priv, TMIO_SD_INFO1) &
TMIO_SD_INFO1_CD);
}
static void tmio_sd_host_init(struct tmio_sd_priv *priv)
{
u32 tmp;
/* soft reset of the host */
tmp = tmio_sd_readl(priv, TMIO_SD_SOFT_RST);
tmp &= ~TMIO_SD_SOFT_RST_RSTX;
tmio_sd_writel(priv, tmp, TMIO_SD_SOFT_RST);
tmp |= TMIO_SD_SOFT_RST_RSTX;
tmio_sd_writel(priv, tmp, TMIO_SD_SOFT_RST);
/* FIXME: implement eMMC hw_reset */
tmio_sd_writel(priv, TMIO_SD_STOP_SEC, TMIO_SD_STOP);
/*
* Connected to 32bit AXI.
* This register dropped backward compatibility at version 0x10.
* Write an appropriate value depending on the IP version.
*/
if (priv->version >= 0x10) {
if (priv->caps & TMIO_SD_CAP_64BIT)
tmio_sd_writel(priv, 0x000, TMIO_SD_HOST_MODE);
else
tmio_sd_writel(priv, 0x101, TMIO_SD_HOST_MODE);
} else {
tmio_sd_writel(priv, 0x0, TMIO_SD_HOST_MODE);
}
if (priv->caps & TMIO_SD_CAP_DMA_INTERNAL) {
tmp = tmio_sd_readl(priv, TMIO_SD_DMA_MODE);
tmp |= TMIO_SD_DMA_MODE_ADDR_INC;
tmp |= priv->idma_bus_width;
tmio_sd_writel(priv, tmp, TMIO_SD_DMA_MODE);
}
}
int tmio_sd_bind(struct udevice *dev)
{
struct tmio_sd_plat *plat = dev_get_plat(dev);
return mmc_bind(dev, &plat->mmc, &plat->cfg);
}
int tmio_sd_probe(struct udevice *dev, u32 quirks)
{
struct tmio_sd_plat *plat = dev_get_plat(dev);
struct tmio_sd_priv *priv = dev_get_priv(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
fdt_addr_t base;
ulong mclk;
int ret;
base = dev_read_addr(dev);
if (base == FDT_ADDR_T_NONE)
return -EINVAL;
priv->regbase = devm_ioremap(dev, base, SZ_2K);
if (!priv->regbase)
return -ENOMEM;
if (CONFIG_IS_ENABLED(DM_REGULATOR)) {
device_get_supply_regulator(dev, "vqmmc-supply",
&priv->vqmmc_dev);
if (priv->vqmmc_dev)
regulator_set_value(priv->vqmmc_dev, 3300000);
}
ret = mmc_of_parse(dev, &plat->cfg);
if (ret < 0) {
dev_err(dev, "failed to parse host caps\n");
return ret;
}
plat->cfg.name = dev->name;
plat->cfg.host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
if (quirks)
priv->caps = quirks;
priv->version = tmio_sd_readl(priv, TMIO_SD_VERSION) &
TMIO_SD_VERSION_IP;
dev_dbg(dev, "version %x\n", priv->version);
if (priv->version >= 0x10) {
priv->caps |= TMIO_SD_CAP_DMA_INTERNAL;
if (!(priv->caps & TMIO_SD_CAP_RCAR))
priv->caps |= TMIO_SD_CAP_DIV1024;
}
if (fdt_get_property(gd->fdt_blob, dev_of_offset(dev), "non-removable",
NULL))
priv->caps |= TMIO_SD_CAP_NONREMOVABLE;
tmio_sd_host_init(priv);
mclk = tmio_sd_clk_get_rate(priv);
plat->cfg.voltages = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34;
plat->cfg.f_min = mclk /
(priv->caps & TMIO_SD_CAP_DIV1024 ? 1024 : 512);
plat->cfg.f_max = mclk;
if (quirks & TMIO_SD_CAP_16BIT)
plat->cfg.b_max = U16_MAX; /* max value of TMIO_SD_SECCNT */
else
plat->cfg.b_max = U32_MAX; /* max value of TMIO_SD_SECCNT */
upriv->mmc = &plat->mmc;
return 0;
}
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