Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-12-11 13:56:30 +00:00
Code Issues Projects Releases Packages Wiki Activity
u-boot/drivers/mmc/renesas-sdhi.c
Marek Vasut f20a61af42 mmc: renesas-sdhi: Add proper probe error fail path 
In case one of the calls in probe fail, trigger a fail path and
undo all the steps done in probe until the point of failure.
The current implementation failed to stop controller clock and
free claimed clock, so fix that. Furthermore, print return code
in error prints for easier debugging.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
2023-03-10 17:45:47 +01:00

1036 lines
29 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
*/
#include <common.h>
#include <bouncebuf.h>
#include <clk.h>
#include <fdtdec.h>
#include <log.h>
#include <malloc.h>
#include <mmc.h>
#include <dm.h>
#include <asm/global_data.h>
#include <dm/device_compat.h>
#include <linux/bitops.h>
#include <linux/compat.h>
#include <linux/delay.h>
#include <linux/dma-direction.h>
#include <linux/io.h>
#include <linux/sizes.h>
#include <power/regulator.h>
#include <asm/unaligned.h>
#include "tmio-common.h"
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
/* SCC registers */
#define RENESAS_SDHI_SCC_DTCNTL 0x800
#define RENESAS_SDHI_SCC_DTCNTL_TAPEN BIT(0)
#define RENESAS_SDHI_SCC_DTCNTL_TAPNUM_SHIFT 16
#define RENESAS_SDHI_SCC_DTCNTL_TAPNUM_MASK 0xff
#define RENESAS_SDHI_SCC_TAPSET 0x804
#define RENESAS_SDHI_SCC_DT2FF 0x808
#define RENESAS_SDHI_SCC_CKSEL 0x80c
#define RENESAS_SDHI_SCC_CKSEL_DTSEL BIT(0)
#define RENESAS_SDHI_SCC_RVSCNTL 0x810
#define RENESAS_SDHI_SCC_RVSCNTL_RVSEN BIT(0)
#define RENESAS_SDHI_SCC_RVSREQ 0x814
#define RENESAS_SDHI_SCC_RVSREQ_RVSERR BIT(2)
#define RENESAS_SDHI_SCC_RVSREQ_REQTAPUP BIT(1)
#define RENESAS_SDHI_SCC_RVSREQ_REQTAPDOWN BIT(0)
#define RENESAS_SDHI_SCC_SMPCMP 0x818
#define RENESAS_SDHI_SCC_SMPCMP_CMD_ERR (BIT(24) | BIT(8))
#define RENESAS_SDHI_SCC_SMPCMP_CMD_REQUP BIT(24)
#define RENESAS_SDHI_SCC_SMPCMP_CMD_REQDOWN BIT(8)
#define RENESAS_SDHI_SCC_TMPPORT2 0x81c
#define RENESAS_SDHI_SCC_TMPPORT2_HS400EN BIT(31)
#define RENESAS_SDHI_SCC_TMPPORT2_HS400OSEL BIT(4)
#define RENESAS_SDHI_SCC_TMPPORT3 0x828
#define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_0 3
#define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_1 2
#define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_2 1
#define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_3 0
#define RENESAS_SDHI_SCC_TMPPORT3_OFFSET_MASK 0x3
#define RENESAS_SDHI_SCC_TMPPORT4 0x82c
#define RENESAS_SDHI_SCC_TMPPORT4_DLL_ACC_START BIT(0)
#define RENESAS_SDHI_SCC_TMPPORT5 0x830
#define RENESAS_SDHI_SCC_TMPPORT5_DLL_RW_SEL_R BIT(8)
#define RENESAS_SDHI_SCC_TMPPORT5_DLL_RW_SEL_W (0 << 8)
#define RENESAS_SDHI_SCC_TMPPORT5_DLL_ADR_MASK 0x3F
#define RENESAS_SDHI_SCC_TMPPORT6 0x834
#define RENESAS_SDHI_SCC_TMPPORT7 0x838
#define RENESAS_SDHI_SCC_TMPPORT_DISABLE_WP_CODE 0xa5000000
#define RENESAS_SDHI_SCC_TMPPORT_CALIB_CODE_MASK 0x1f
#define RENESAS_SDHI_SCC_TMPPORT_MANUAL_MODE BIT(7)
#define RENESAS_SDHI_MAX_TAP 3
#define CALIB_TABLE_MAX (RENESAS_SDHI_SCC_TMPPORT_CALIB_CODE_MASK + 1)
static const u8 r8a7796_rev13_calib_table[2][CALIB_TABLE_MAX] = {
{ 3, 3, 3, 3, 3, 3, 3, 4, 4, 5, 6, 7, 8, 9, 10, 15,
16, 16, 16, 16, 16, 16, 17, 18, 18, 19, 20, 21, 22, 23, 24, 25 },
{ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 7, 8, 11,
12, 17, 18, 18, 18, 18, 18, 18, 18, 19, 20, 21, 22, 23, 25, 25 }
};
static const u8 r8a77965_calib_table[2][CALIB_TABLE_MAX] = {
{ 1, 2, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 15, 15, 16,
17, 18, 19, 20, 21, 22, 23, 24, 25, 25, 26, 27, 28, 29, 30, 31 },
{ 2, 3, 4, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17,
17, 17, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 31, 31, 31 }
};
static const u8 r8a77990_calib_table[2][CALIB_TABLE_MAX] = {
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 1, 2, 3, 3, 4, 4, 4, 5, 5, 6, 8, 9, 10,
11, 12, 13, 15, 16, 17, 17, 18, 18, 19, 20, 22, 24, 25, 26, 26 }
};
static int rmobile_is_gen3_mmc0(struct tmio_sd_priv *priv)
{
/* On R-Car Gen3, MMC0 is at 0xee140000 */
return (uintptr_t)(priv->regbase) == 0xee140000;
}
static u32 sd_scc_tmpport_read32(struct tmio_sd_priv *priv, u32 addr)
{
/* read mode */
tmio_sd_writel(priv, RENESAS_SDHI_SCC_TMPPORT5_DLL_RW_SEL_R |
(RENESAS_SDHI_SCC_TMPPORT5_DLL_ADR_MASK & addr),
RENESAS_SDHI_SCC_TMPPORT5);
/* access start and stop */
tmio_sd_writel(priv, RENESAS_SDHI_SCC_TMPPORT4_DLL_ACC_START,
RENESAS_SDHI_SCC_TMPPORT4);
tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_TMPPORT4);
return tmio_sd_readl(priv, RENESAS_SDHI_SCC_TMPPORT7);
}
static void sd_scc_tmpport_write32(struct tmio_sd_priv *priv, u32 addr, u32 val)
{
/* write mode */
tmio_sd_writel(priv, RENESAS_SDHI_SCC_TMPPORT5_DLL_RW_SEL_W |
(RENESAS_SDHI_SCC_TMPPORT5_DLL_ADR_MASK & addr),
RENESAS_SDHI_SCC_TMPPORT5);
tmio_sd_writel(priv, val, RENESAS_SDHI_SCC_TMPPORT6);
/* access start and stop */
tmio_sd_writel(priv, RENESAS_SDHI_SCC_TMPPORT4_DLL_ACC_START,
RENESAS_SDHI_SCC_TMPPORT4);
tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_TMPPORT4);
}
static bool renesas_sdhi_check_scc_error(struct udevice *dev)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
struct mmc *mmc = mmc_get_mmc_dev(dev);
unsigned long new_tap = priv->tap_set;
unsigned long error_tap = priv->tap_set;
u32 reg, smpcmp;
if ((priv->caps & TMIO_SD_CAP_RCAR_UHS) &&
(mmc->selected_mode != UHS_SDR104) &&
(mmc->selected_mode != MMC_HS_200) &&
(mmc->selected_mode != MMC_HS_400) &&
(priv->nrtaps != 4))
return false;
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL);
/* Handle automatic tuning correction */
if (reg & RENESAS_SDHI_SCC_RVSCNTL_RVSEN) {
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSREQ);
if (reg & RENESAS_SDHI_SCC_RVSREQ_RVSERR) {
tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_RVSREQ);
return true;
}
return false;
}
/* Handle manual tuning correction */
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSREQ);
if (!reg) /* No error */
return false;
tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_RVSREQ);
if (mmc->selected_mode == MMC_HS_400) {
/*
* Correction Error Status contains CMD and DAT signal status.
* In HS400, DAT signal based on DS signal, not CLK.
* Therefore, use only CMD status.
*/
smpcmp = tmio_sd_readl(priv, RENESAS_SDHI_SCC_SMPCMP) &
RENESAS_SDHI_SCC_SMPCMP_CMD_ERR;
switch (smpcmp) {
case 0:
return false; /* No error in CMD signal */
case RENESAS_SDHI_SCC_SMPCMP_CMD_REQUP:
new_tap = (priv->tap_set +
priv->tap_num + 1) % priv->tap_num;
error_tap = (priv->tap_set +
priv->tap_num - 1) % priv->tap_num;
break;
case RENESAS_SDHI_SCC_SMPCMP_CMD_REQDOWN:
new_tap = (priv->tap_set +
priv->tap_num - 1) % priv->tap_num;
error_tap = (priv->tap_set +
priv->tap_num + 1) % priv->tap_num;
break;
default:
return true; /* Need re-tune */
}
if (priv->hs400_bad_tap & BIT(new_tap)) {
/*
* New tap is bad tap (cannot change).
* Compare with HS200 tuning result.
* In HS200 tuning, when smpcmp[error_tap]
* is OK, retune is executed.
*/
if (priv->smpcmp & BIT(error_tap))
return true; /* Need retune */
return false; /* cannot change */
}
priv->tap_set = new_tap;
} else {
if (reg & RENESAS_SDHI_SCC_RVSREQ_RVSERR)
return true; /* Need re-tune */
else if (reg & RENESAS_SDHI_SCC_RVSREQ_REQTAPUP)
priv->tap_set = (priv->tap_set +
priv->tap_num + 1) % priv->tap_num;
else if (reg & RENESAS_SDHI_SCC_RVSREQ_REQTAPDOWN)
priv->tap_set = (priv->tap_set +
priv->tap_num - 1) % priv->tap_num;
else
return false;
}
/* Set TAP position */
tmio_sd_writel(priv, priv->tap_set >> ((priv->nrtaps == 4) ? 1 : 0),
RENESAS_SDHI_SCC_TAPSET);
return false;
}
static void renesas_sdhi_adjust_hs400_mode_enable(struct tmio_sd_priv *priv)
{
u32 calib_code;
if (!priv->adjust_hs400_enable)
return;
if (!priv->needs_adjust_hs400)
return;
if (!priv->adjust_hs400_calib_table)
return;
/*
* Enabled Manual adjust HS400 mode
*
* 1) Disabled Write Protect
* W(addr=0x00, WP_DISABLE_CODE)
*
* 2) Read Calibration code
* read_value = R(addr=0x26)
* 3) Refer to calibration table
* Calibration code = table[read_value]
* 4) Enabled Manual Calibration
* W(addr=0x22, manual mode | Calibration code)
* 5) Set Offset value to TMPPORT3 Reg
*/
sd_scc_tmpport_write32(priv, 0x00,
RENESAS_SDHI_SCC_TMPPORT_DISABLE_WP_CODE);
calib_code = sd_scc_tmpport_read32(priv, 0x26);
calib_code &= RENESAS_SDHI_SCC_TMPPORT_CALIB_CODE_MASK;
sd_scc_tmpport_write32(priv, 0x22,
RENESAS_SDHI_SCC_TMPPORT_MANUAL_MODE |
priv->adjust_hs400_calib_table[calib_code]);
tmio_sd_writel(priv, priv->adjust_hs400_offset,
RENESAS_SDHI_SCC_TMPPORT3);
/* Clear flag */
priv->needs_adjust_hs400 = false;
}
static void renesas_sdhi_adjust_hs400_mode_disable(struct tmio_sd_priv *priv)
{
/* Disabled Manual adjust HS400 mode
*
* 1) Disabled Write Protect
* W(addr=0x00, WP_DISABLE_CODE)
* 2) Disabled Manual Calibration
* W(addr=0x22, 0)
* 3) Clear offset value to TMPPORT3 Reg
*/
sd_scc_tmpport_write32(priv, 0x00,
RENESAS_SDHI_SCC_TMPPORT_DISABLE_WP_CODE);
sd_scc_tmpport_write32(priv, 0x22, 0);
tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_TMPPORT3);
}
static unsigned int renesas_sdhi_init_tuning(struct tmio_sd_priv *priv)
{
u32 reg;
/* Initialize SCC */
tmio_sd_writel(priv, 0, TMIO_SD_INFO1);
reg = tmio_sd_readl(priv, TMIO_SD_CLKCTL);
reg &= ~TMIO_SD_CLKCTL_SCLKEN;
tmio_sd_writel(priv, reg, TMIO_SD_CLKCTL);
/* Set sampling clock selection range */
tmio_sd_writel(priv, (0x8 << RENESAS_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) |
RENESAS_SDHI_SCC_DTCNTL_TAPEN,
RENESAS_SDHI_SCC_DTCNTL);
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_CKSEL);
reg |= RENESAS_SDHI_SCC_CKSEL_DTSEL;
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_CKSEL);
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL);
reg &= ~RENESAS_SDHI_SCC_RVSCNTL_RVSEN;
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL);
tmio_sd_writel(priv, 0x300 /* scc_tappos */,
RENESAS_SDHI_SCC_DT2FF);
reg = tmio_sd_readl(priv, TMIO_SD_CLKCTL);
reg |= TMIO_SD_CLKCTL_SCLKEN;
tmio_sd_writel(priv, reg, TMIO_SD_CLKCTL);
/* Read TAPNUM */
return (tmio_sd_readl(priv, RENESAS_SDHI_SCC_DTCNTL) >>
RENESAS_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) &
RENESAS_SDHI_SCC_DTCNTL_TAPNUM_MASK;
}
static void renesas_sdhi_reset_tuning(struct tmio_sd_priv *priv)
{
u32 reg;
/* Reset SCC */
reg = tmio_sd_readl(priv, TMIO_SD_CLKCTL);
reg &= ~TMIO_SD_CLKCTL_SCLKEN;
tmio_sd_writel(priv, reg, TMIO_SD_CLKCTL);
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_CKSEL);
reg &= ~RENESAS_SDHI_SCC_CKSEL_DTSEL;
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_CKSEL);
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_TMPPORT2);
reg &= ~(RENESAS_SDHI_SCC_TMPPORT2_HS400EN |
RENESAS_SDHI_SCC_TMPPORT2_HS400OSEL);
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_TMPPORT2);
/* Disable HS400 mode adjustment */
renesas_sdhi_adjust_hs400_mode_disable(priv);
reg = tmio_sd_readl(priv, TMIO_SD_CLKCTL);
reg |= TMIO_SD_CLKCTL_SCLKEN;
tmio_sd_writel(priv, reg, TMIO_SD_CLKCTL);
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL);
reg &= ~RENESAS_SDHI_SCC_RVSCNTL_RVSEN;
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL);
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL);
reg &= ~RENESAS_SDHI_SCC_RVSCNTL_RVSEN;
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL);
}
static int renesas_sdhi_hs400(struct udevice *dev)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
struct mmc *mmc = mmc_get_mmc_dev(dev);
bool hs400 = (mmc->selected_mode == MMC_HS_400);
int ret, taps = hs400 ? priv->nrtaps : 8;
const u32 sdn_rate = 200000000;
u32 sdnh_rate = 800000000;
unsigned long new_tap;
u32 reg;
if (clk_valid(&priv->clkh) && !priv->needs_clkh_fallback) {
/* HS400 on 4tap SoC => SDnH=400 MHz, SDn=200 MHz */
if (taps == 4)
sdnh_rate /= 2;
ret = clk_set_rate(&priv->clkh, sdnh_rate);
if (ret < 0)
return ret;
}
ret = clk_set_rate(&priv->clk, sdn_rate);
if (ret < 0)
return ret;
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL);
reg &= ~RENESAS_SDHI_SCC_RVSCNTL_RVSEN;
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL);
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_TMPPORT2);
if (hs400) {
reg |= RENESAS_SDHI_SCC_TMPPORT2_HS400EN |
RENESAS_SDHI_SCC_TMPPORT2_HS400OSEL;
} else {
reg &= ~(RENESAS_SDHI_SCC_TMPPORT2_HS400EN |
RENESAS_SDHI_SCC_TMPPORT2_HS400OSEL);
}
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_TMPPORT2);
/* Disable HS400 mode adjustment */
if (!hs400)
renesas_sdhi_adjust_hs400_mode_disable(priv);
tmio_sd_writel(priv, (0x8 << RENESAS_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) |
RENESAS_SDHI_SCC_DTCNTL_TAPEN,
RENESAS_SDHI_SCC_DTCNTL);
/* Avoid bad TAP */
if (priv->hs400_bad_tap & BIT(priv->tap_set)) {
new_tap = (priv->tap_set +
priv->tap_num + 1) % priv->tap_num;
if (priv->hs400_bad_tap & BIT(new_tap))
new_tap = (priv->tap_set +
priv->tap_num - 1) % priv->tap_num;
if (priv->hs400_bad_tap & BIT(new_tap)) {
new_tap = priv->tap_set;
debug("Three consecutive bad tap is prohibited\n");
}
priv->tap_set = new_tap;
tmio_sd_writel(priv, priv->tap_set, RENESAS_SDHI_SCC_TAPSET);
}
if (taps == 4) {
tmio_sd_writel(priv, priv->tap_set >> 1,
RENESAS_SDHI_SCC_TAPSET);
tmio_sd_writel(priv, hs400 ? 0x100 : 0x300,
RENESAS_SDHI_SCC_DT2FF);
} else {
tmio_sd_writel(priv, priv->tap_set, RENESAS_SDHI_SCC_TAPSET);
tmio_sd_writel(priv, 0x300, RENESAS_SDHI_SCC_DT2FF);
}
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_CKSEL);
reg |= RENESAS_SDHI_SCC_CKSEL_DTSEL;
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_CKSEL);
/* Execute adjust hs400 offset after setting to HS400 mode */
if (hs400)
priv->needs_adjust_hs400 = true;
return 0;
}
static void renesas_sdhi_prepare_tuning(struct tmio_sd_priv *priv,
unsigned long tap)
{
/* Set sampling clock position */
tmio_sd_writel(priv, tap, RENESAS_SDHI_SCC_TAPSET);
}
static unsigned int renesas_sdhi_compare_scc_data(struct tmio_sd_priv *priv)
{
/* Get comparison of sampling data */
return tmio_sd_readl(priv, RENESAS_SDHI_SCC_SMPCMP);
}
static int renesas_sdhi_select_tuning(struct tmio_sd_priv *priv,
unsigned int taps)
{
unsigned long tap_cnt; /* counter of tuning success */
unsigned long tap_start;/* start position of tuning success */
unsigned long tap_end; /* end position of tuning success */
unsigned long ntap; /* temporary counter of tuning success */
unsigned long match_cnt;/* counter of matching data */
unsigned long i;
bool select = false;
u32 reg;
priv->needs_adjust_hs400 = false;
/* Clear SCC_RVSREQ */
tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_RVSREQ);
/* Merge the results */
for (i = 0; i < priv->tap_num * 2; i++) {
if (!(taps & BIT(i))) {
taps &= ~BIT(i % priv->tap_num);
taps &= ~BIT((i % priv->tap_num) + priv->tap_num);
}
if (!(priv->smpcmp & BIT(i))) {
priv->smpcmp &= ~BIT(i % priv->tap_num);
priv->smpcmp &= ~BIT((i % priv->tap_num) + priv->tap_num);
}
}
/*
* Find the longest consecutive run of successful probes. If that
* is more than RENESAS_SDHI_MAX_TAP probes long then use the
* center index as the tap.
*/
tap_cnt = 0;
ntap = 0;
tap_start = 0;
tap_end = 0;
for (i = 0; i < priv->tap_num * 2; i++) {
if (taps & BIT(i))
ntap++;
else {
if (ntap > tap_cnt) {
tap_start = i - ntap;
tap_end = i - 1;
tap_cnt = ntap;
}
ntap = 0;
}
}
if (ntap > tap_cnt) {
tap_start = i - ntap;
tap_end = i - 1;
tap_cnt = ntap;
}
/*
* If all of the TAP is OK, the sampling clock position is selected by
* identifying the change point of data.
*/
if (tap_cnt == priv->tap_num * 2) {
match_cnt = 0;
ntap = 0;
tap_start = 0;
tap_end = 0;
for (i = 0; i < priv->tap_num * 2; i++) {
if (priv->smpcmp & BIT(i))
ntap++;
else {
if (ntap > match_cnt) {
tap_start = i - ntap;
tap_end = i - 1;
match_cnt = ntap;
}
ntap = 0;
}
}
if (ntap > match_cnt) {
tap_start = i - ntap;
tap_end = i - 1;
match_cnt = ntap;
}
if (match_cnt)
select = true;
} else if (tap_cnt >= RENESAS_SDHI_MAX_TAP)
select = true;
if (select)
priv->tap_set = ((tap_start + tap_end) / 2) % priv->tap_num;
else
return -EIO;
/* Set SCC */
tmio_sd_writel(priv, priv->tap_set, RENESAS_SDHI_SCC_TAPSET);
/* Enable auto re-tuning */
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL);
reg |= RENESAS_SDHI_SCC_RVSCNTL_RVSEN;
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL);
return 0;
}
int renesas_sdhi_execute_tuning(struct udevice *dev, uint opcode)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct mmc *mmc = upriv->mmc;
unsigned int tap_num;
unsigned int taps = 0;
int i, ret = 0;
u32 caps;
/* Only supported on Renesas RCar */
if (!(priv->caps & TMIO_SD_CAP_RCAR_UHS))
return -EINVAL;
/* clock tuning is not needed for upto 52MHz */
if (!((mmc->selected_mode == MMC_HS_200) ||
(mmc->selected_mode == MMC_HS_400) ||
(mmc->selected_mode == UHS_SDR104) ||
(mmc->selected_mode == UHS_SDR50)))
return 0;
tap_num = renesas_sdhi_init_tuning(priv);
if (!tap_num)
/* Tuning is not supported */
goto out;
priv->tap_num = tap_num;
if (priv->tap_num * 2 >= sizeof(taps) * 8) {
dev_err(dev,
"Too many taps, skipping tuning. Please consider updating size of taps field of tmio_mmc_host\n");
goto out;
}
priv->smpcmp = 0;
/* Issue CMD19 twice for each tap */
for (i = 0; i < 2 * priv->tap_num; i++) {
renesas_sdhi_prepare_tuning(priv, i % priv->tap_num);
/* Force PIO for the tuning */
caps = priv->caps;
priv->caps &= ~TMIO_SD_CAP_DMA_INTERNAL;
ret = mmc_send_tuning(mmc, opcode, NULL);
priv->caps = caps;
if (ret == 0)
taps |= BIT(i);
ret = renesas_sdhi_compare_scc_data(priv);
if (ret == 0)
priv->smpcmp |= BIT(i);
mdelay(1);
}
ret = renesas_sdhi_select_tuning(priv, taps);
out:
if (ret < 0) {
dev_warn(dev, "Tuning procedure failed\n");
renesas_sdhi_reset_tuning(priv);
}
return ret;
}
#else
static int renesas_sdhi_hs400(struct udevice *dev)
{
return 0;
}
#endif
static int renesas_sdhi_set_ios(struct udevice *dev)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
u32 tmp;
int ret;
/* Stop the clock before changing its rate to avoid a glitch signal */
tmp = tmio_sd_readl(priv, TMIO_SD_CLKCTL);
tmp &= ~TMIO_SD_CLKCTL_SCLKEN;
tmio_sd_writel(priv, tmp, TMIO_SD_CLKCTL);
ret = renesas_sdhi_hs400(dev);
if (ret)
return ret;
ret = tmio_sd_set_ios(dev);
mdelay(10);
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
struct mmc *mmc = mmc_get_mmc_dev(dev);
if ((priv->caps & TMIO_SD_CAP_RCAR_UHS) &&
(mmc->selected_mode != UHS_SDR104) &&
(mmc->selected_mode != MMC_HS_200) &&
(mmc->selected_mode != MMC_HS_400)) {
renesas_sdhi_reset_tuning(priv);
}
#endif
return ret;
}
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
static int renesas_sdhi_wait_dat0(struct udevice *dev, int state,
int timeout_us)
{
int ret = -ETIMEDOUT;
bool dat0_high;
bool target_dat0_high = !!state;
struct tmio_sd_priv *priv = dev_get_priv(dev);
timeout_us = DIV_ROUND_UP(timeout_us, 10); /* check every 10 us. */
while (timeout_us--) {
dat0_high = !!(tmio_sd_readl(priv, TMIO_SD_INFO2) & TMIO_SD_INFO2_DAT0);
if (dat0_high == target_dat0_high) {
ret = 0;
break;
}
udelay(10);
}
return ret;
}
#endif
#define RENESAS_SDHI_DMA_ALIGNMENT 128
static int renesas_sdhi_addr_aligned_gen(uintptr_t ubuf,
size_t len, size_t len_aligned)
{
/* Check if start is aligned */
if (!IS_ALIGNED(ubuf, RENESAS_SDHI_DMA_ALIGNMENT)) {
debug("Unaligned buffer address %lx\n", ubuf);
return 0;
}
/* Check if length is aligned */
if (len != len_aligned) {
debug("Unaligned buffer length %zu\n", len);
return 0;
}
#ifdef CONFIG_PHYS_64BIT
/* Check if below 32bit boundary */
if ((ubuf >> 32) || (ubuf + len_aligned) >> 32) {
debug("Buffer above 32bit boundary %lx-%lx\n",
ubuf, ubuf + len_aligned);
return 0;
}
#endif
/* Aligned */
return 1;
}
static int renesas_sdhi_addr_aligned(struct bounce_buffer *state)
{
uintptr_t ubuf = (uintptr_t)state->user_buffer;
return renesas_sdhi_addr_aligned_gen(ubuf, state->len,
state->len_aligned);
}
static int renesas_sdhi_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
struct mmc_data *data)
{
struct bounce_buffer bbstate;
unsigned int bbflags;
bool bbok = false;
size_t len;
void *buf;
int ret;
if (data) {
if (data->flags & MMC_DATA_READ) {
buf = data->dest;
bbflags = GEN_BB_WRITE;
} else {
buf = (void *)data->src;
bbflags = GEN_BB_READ;
}
len = data->blocks * data->blocksize;
ret = bounce_buffer_start_extalign(&bbstate, buf, len, bbflags,
RENESAS_SDHI_DMA_ALIGNMENT,
renesas_sdhi_addr_aligned);
/*
* If the amount of data to transfer is too large, we can get
* -ENOMEM when starting the bounce buffer. If that happens,
* fall back to PIO as it was before, otherwise use the BB.
*/
if (!ret) {
bbok = true;
if (data->flags & MMC_DATA_READ)
data->dest = bbstate.bounce_buffer;
else
data->src = bbstate.bounce_buffer;
}
}
ret = tmio_sd_send_cmd(dev, cmd, data);
if (data && bbok) {
buf = bbstate.user_buffer;
bounce_buffer_stop(&bbstate);
if (data->flags & MMC_DATA_READ)
data->dest = buf;
else
data->src = buf;
}
if (ret)
return ret;
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
struct tmio_sd_priv *priv = dev_get_priv(dev);
renesas_sdhi_check_scc_error(dev);
if (cmd->cmdidx == MMC_CMD_SEND_STATUS)
renesas_sdhi_adjust_hs400_mode_enable(priv);
#endif
return 0;
}
int renesas_sdhi_get_b_max(struct udevice *dev, void *dst, lbaint_t blkcnt)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct mmc *mmc = upriv->mmc;
size_t len = blkcnt * mmc->read_bl_len;
size_t len_align = roundup(len, RENESAS_SDHI_DMA_ALIGNMENT);
if (renesas_sdhi_addr_aligned_gen((uintptr_t)dst, len, len_align)) {
if (priv->quirks & TMIO_SD_CAP_16BIT)
return U16_MAX;
else
return U32_MAX;
} else {
return (CONFIG_SYS_MALLOC_LEN / 4) / mmc->read_bl_len;
}
}
static const struct dm_mmc_ops renesas_sdhi_ops = {
.send_cmd = renesas_sdhi_send_cmd,
.set_ios = renesas_sdhi_set_ios,
.get_cd = tmio_sd_get_cd,
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
.execute_tuning = renesas_sdhi_execute_tuning,
#endif
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
.wait_dat0 = renesas_sdhi_wait_dat0,
#endif
.get_b_max = renesas_sdhi_get_b_max,
};
#define RENESAS_GEN2_QUIRKS TMIO_SD_CAP_RCAR_GEN2
#define RENESAS_GEN3_QUIRKS \
TMIO_SD_CAP_64BIT | TMIO_SD_CAP_RCAR_GEN3 | TMIO_SD_CAP_RCAR_UHS
static const struct udevice_id renesas_sdhi_match[] = {
{ .compatible = "renesas,sdhi-r8a7790", .data = RENESAS_GEN2_QUIRKS },
{ .compatible = "renesas,sdhi-r8a7791", .data = RENESAS_GEN2_QUIRKS },
{ .compatible = "renesas,sdhi-r8a7792", .data = RENESAS_GEN2_QUIRKS },
{ .compatible = "renesas,sdhi-r8a7793", .data = RENESAS_GEN2_QUIRKS },
{ .compatible = "renesas,sdhi-r8a7794", .data = RENESAS_GEN2_QUIRKS },
{ .compatible = "renesas,sdhi-r8a7795", .data = RENESAS_GEN3_QUIRKS },
{ .compatible = "renesas,sdhi-r8a7796", .data = RENESAS_GEN3_QUIRKS },
{ .compatible = "renesas,sdhi-r8a77961", .data = RENESAS_GEN3_QUIRKS },
{ .compatible = "renesas,rcar-gen3-sdhi", .data = RENESAS_GEN3_QUIRKS },
{ .compatible = "renesas,sdhi-r8a77965", .data = RENESAS_GEN3_QUIRKS },
{ .compatible = "renesas,sdhi-r8a77970", .data = RENESAS_GEN3_QUIRKS },
{ .compatible = "renesas,sdhi-r8a77990", .data = RENESAS_GEN3_QUIRKS },
{ .compatible = "renesas,sdhi-r8a77995", .data = RENESAS_GEN3_QUIRKS },
{ /* sentinel */ }
};
static ulong renesas_sdhi_clk_get_rate(struct tmio_sd_priv *priv)
{
return clk_get_rate(&priv->clk);
}
static void renesas_sdhi_filter_caps(struct udevice *dev)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
if (!(priv->caps & TMIO_SD_CAP_RCAR_GEN3))
return;
if (priv->caps & TMIO_SD_CAP_DMA_INTERNAL)
priv->idma_bus_width = TMIO_SD_DMA_MODE_BUS_WIDTH;
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
struct tmio_sd_plat *plat = dev_get_plat(dev);
/* HS400 is not supported on H3 ES1.x, M3W ES1.[012], V3M, V3H ES1.x, D3 */
if (((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7795) &&
(rmobile_get_cpu_rev_integer() <= 1)) ||
((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
(rmobile_get_cpu_rev_integer() == 1) &&
(rmobile_get_cpu_rev_fraction() <= 2)) ||
(rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A77970) ||
((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A77980) &&
(rmobile_get_cpu_rev_integer() <= 1)) ||
(rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A77995))
plat->cfg.host_caps &= ~MMC_MODE_HS400;
/* H3 ES2.0, ES3.0 and M3W ES1.2 and M3N bad taps */
if (((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7795) &&
(rmobile_get_cpu_rev_integer() >= 2)) ||
((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
(rmobile_get_cpu_rev_integer() == 1) &&
(rmobile_get_cpu_rev_fraction() == 2)) ||
(rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A77965))
priv->hs400_bad_tap = BIT(2) | BIT(3) | BIT(6) | BIT(7);
/* M3W ES1.x for x>2 can use HS400 with manual adjustment and taps */
if ((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
(rmobile_get_cpu_rev_integer() == 1) &&
(rmobile_get_cpu_rev_fraction() > 2)) {
priv->adjust_hs400_enable = true;
priv->adjust_hs400_offset = 3;
priv->hs400_bad_tap = BIT(1) | BIT(3) | BIT(5) | BIT(7);
priv->adjust_hs400_calib_table =
r8a7796_rev13_calib_table[!rmobile_is_gen3_mmc0(priv)];
}
/* M3W+ bad taps */
if ((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
(rmobile_get_cpu_rev_integer() == 3))
priv->hs400_bad_tap = BIT(1) | BIT(3) | BIT(5) | BIT(7);
/* M3N can use HS400 with manual adjustment */
if (rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A77965) {
priv->adjust_hs400_enable = true;
priv->adjust_hs400_offset = 3;
priv->adjust_hs400_calib_table =
r8a77965_calib_table[!rmobile_is_gen3_mmc0(priv)];
}
/* E3 can use HS400 with manual adjustment */
if (rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A77990) {
priv->adjust_hs400_enable = true;
priv->adjust_hs400_offset = 3;
priv->adjust_hs400_calib_table =
r8a77990_calib_table[!rmobile_is_gen3_mmc0(priv)];
}
/* H3 ES1.x, ES2.0 and M3W ES1.[0123] uses 4 tuning taps */
if (((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7795) &&
(rmobile_get_cpu_rev_integer() <= 2)) ||
((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
(rmobile_get_cpu_rev_integer() == 1) &&
(rmobile_get_cpu_rev_fraction() <= 3)))
priv->nrtaps = 4;
else
priv->nrtaps = 8;
#endif
/* H3 ES1.x and M3W ES1.0 uses bit 17 for DTRAEND */
if (((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7795) &&
(rmobile_get_cpu_rev_integer() <= 1)) ||
((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
(rmobile_get_cpu_rev_integer() == 1) &&
(rmobile_get_cpu_rev_fraction() == 0)))
priv->read_poll_flag = TMIO_SD_DMA_INFO1_END_RD;
else
priv->read_poll_flag = TMIO_SD_DMA_INFO1_END_RD2;
/* V3M handles SD0H differently than other Gen3 SoCs */
if (rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A77970)
priv->needs_clkh_fallback = true;
else
priv->needs_clkh_fallback = false;
}
static int renesas_sdhi_probe(struct udevice *dev)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
u32 quirks = dev_get_driver_data(dev);
struct fdt_resource reg_res;
DECLARE_GLOBAL_DATA_PTR;
int ret;
priv->clk_get_rate = renesas_sdhi_clk_get_rate;
if (quirks == RENESAS_GEN2_QUIRKS) {
ret = fdt_get_resource(gd->fdt_blob, dev_of_offset(dev),
"reg", 0, &reg_res);
if (ret < 0) {
dev_err(dev, "\"reg\" resource not found, ret=%i\n",
ret);
return ret;
}
if (fdt_resource_size(&reg_res) == 0x100)
quirks |= TMIO_SD_CAP_16BIT;
}
ret = clk_get_by_index(dev, 0, &priv->clk);
if (ret < 0) {
dev_err(dev, "failed to get host clock\n");
return ret;
}
/* optional SDnH clock */
ret = clk_get_by_name(dev, "clkh", &priv->clkh);
if (ret < 0) {
dev_dbg(dev, "failed to get clkh\n");
} else {
ret = clk_set_rate(&priv->clkh, 800000000);
if (ret < 0) {
dev_err(dev, "failed to set rate for SDnH clock (%d)\n", ret);
goto err_clk;
}
}
/* set to max rate */
ret = clk_set_rate(&priv->clk, 200000000);
if (ret < 0) {
dev_err(dev, "failed to set rate for SDn clock (%d)\n", ret);
goto err_clkh;
}
ret = clk_enable(&priv->clk);
if (ret) {
dev_err(dev, "failed to enable SDn clock (%d)\n", ret);
goto err_clkh;
}
priv->quirks = quirks;
ret = tmio_sd_probe(dev, quirks);
if (ret)
goto err_tmio_probe;
renesas_sdhi_filter_caps(dev);
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
if (priv->caps & TMIO_SD_CAP_RCAR_UHS)
renesas_sdhi_reset_tuning(priv);
#endif
return 0;
err_tmio_probe:
clk_disable(&priv->clk);
err_clkh:
clk_free(&priv->clkh);
err_clk:
clk_free(&priv->clk);
return ret;
}
U_BOOT_DRIVER(renesas_sdhi) = {
.name = "renesas-sdhi",
.id = UCLASS_MMC,
.of_match = renesas_sdhi_match,
.bind = tmio_sd_bind,
.probe = renesas_sdhi_probe,
.priv_auto = sizeof(struct tmio_sd_priv),
.plat_auto = sizeof(struct tmio_sd_plat),
.ops = &renesas_sdhi_ops,
};
Reference in a new issue View git blame Copy permalink