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u-boot/drivers/mmc/xenon_sdhci.c
Masahiro Yamada 8613c8d897 treewide: convert (void *)devfdt_get_addr() to dev_read_addr_ptr() 
Use the _ptr suffixed variant instead of casting. Also, convert it to
dev_read_addr_ptr(), which is safe to CONFIG_OF_LIVE.

One curious part is an error check like follows in
drivers/watchdog/omap_wdt.c:

    priv->regs = (struct wd_timer *)devfdt_get_addr(dev);
    if (!priv->regs)
            return -EINVAL;

devfdt_get_addr() returns FDT_ADDR_T_NONE (i.e. -1) on error.
So, this code does not catch any error in DT parsing.

dev_read_addr_ptr() returns NULL on error, so this error check
will work.

I generated this commit by the following command:

 $ find . -name .git -prune -o -name '*.[ch]' -type f -print | \
   xargs sed -i -e 's/([^*)]*\*)devfdt_get_addr(/dev_read_addr_ptr(/'

I manually fixed drivers/usb/host/ehci-mx6.c

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2020-07-25 14:46:57 -06:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Driver for Marvell SOC Platform Group Xenon SDHC as a platform device
*
* Copyright (C) 2016 Marvell, All Rights Reserved.
*
* Author: Victor Gu <xigu@marvell.com>
* Date: 2016-8-24
*
* Included parts of the Linux driver version which was written by:
* Hu Ziji <huziji@marvell.com>
*
* Ported to from Marvell 2015.01 to mainline U-Boot 2017.01:
* Stefan Roese <sr@denx.de>
*/
#include <common.h>
#include <dm.h>
#include <fdtdec.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/libfdt.h>
#include <malloc.h>
#include <sdhci.h>
DECLARE_GLOBAL_DATA_PTR;
/* Register Offset of SD Host Controller SOCP self-defined register */
#define SDHC_SYS_CFG_INFO 0x0104
#define SLOT_TYPE_SDIO_SHIFT 24
#define SLOT_TYPE_EMMC_MASK 0xFF
#define SLOT_TYPE_EMMC_SHIFT 16
#define SLOT_TYPE_SD_SDIO_MMC_MASK 0xFF
#define SLOT_TYPE_SD_SDIO_MMC_SHIFT 8
#define NR_SUPPORTED_SLOT_MASK 0x7
#define SDHC_SYS_OP_CTRL 0x0108
#define AUTO_CLKGATE_DISABLE_MASK BIT(20)
#define SDCLK_IDLEOFF_ENABLE_SHIFT 8
#define SLOT_ENABLE_SHIFT 0
#define SDHC_SYS_EXT_OP_CTRL 0x010C
#define MASK_CMD_CONFLICT_ERROR BIT(8)
#define SDHC_SLOT_RETUNING_REQ_CTRL 0x0144
/* retuning compatible */
#define RETUNING_COMPATIBLE 0x1
/* Xenon specific Mode Select value */
#define XENON_SDHCI_CTRL_HS200 0x5
#define XENON_SDHCI_CTRL_HS400 0x6
#define EMMC_PHY_REG_BASE 0x170
#define EMMC_PHY_TIMING_ADJUST EMMC_PHY_REG_BASE
#define OUTPUT_QSN_PHASE_SELECT BIT(17)
#define SAMPL_INV_QSP_PHASE_SELECT BIT(18)
#define SAMPL_INV_QSP_PHASE_SELECT_SHIFT 18
#define EMMC_PHY_SLOW_MODE BIT(29)
#define PHY_INITIALIZAION BIT(31)
#define WAIT_CYCLE_BEFORE_USING_MASK 0xf
#define WAIT_CYCLE_BEFORE_USING_SHIFT 12
#define FC_SYNC_EN_DURATION_MASK 0xf
#define FC_SYNC_EN_DURATION_SHIFT 8
#define FC_SYNC_RST_EN_DURATION_MASK 0xf
#define FC_SYNC_RST_EN_DURATION_SHIFT 4
#define FC_SYNC_RST_DURATION_MASK 0xf
#define FC_SYNC_RST_DURATION_SHIFT 0
#define EMMC_PHY_FUNC_CONTROL (EMMC_PHY_REG_BASE + 0x4)
#define DQ_ASYNC_MODE BIT(4)
#define DQ_DDR_MODE_SHIFT 8
#define DQ_DDR_MODE_MASK 0xff
#define CMD_DDR_MODE BIT(16)
#define EMMC_PHY_PAD_CONTROL (EMMC_PHY_REG_BASE + 0x8)
#define REC_EN_SHIFT 24
#define REC_EN_MASK 0xf
#define FC_DQ_RECEN BIT(24)
#define FC_CMD_RECEN BIT(25)
#define FC_QSP_RECEN BIT(26)
#define FC_QSN_RECEN BIT(27)
#define OEN_QSN BIT(28)
#define AUTO_RECEN_CTRL BIT(30)
#define EMMC_PHY_PAD_CONTROL1 (EMMC_PHY_REG_BASE + 0xc)
#define EMMC5_1_FC_QSP_PD BIT(9)
#define EMMC5_1_FC_QSP_PU BIT(25)
#define EMMC5_1_FC_CMD_PD BIT(8)
#define EMMC5_1_FC_CMD_PU BIT(24)
#define EMMC5_1_FC_DQ_PD 0xff
#define EMMC5_1_FC_DQ_PU (0xff << 16)
#define SDHCI_RETUNE_EVT_INTSIG 0x00001000
/* Hyperion only have one slot 0 */
#define XENON_MMC_SLOT_ID_HYPERION 0
#define MMC_TIMING_LEGACY 0
#define MMC_TIMING_MMC_HS 1
#define MMC_TIMING_SD_HS 2
#define MMC_TIMING_UHS_SDR12 3
#define MMC_TIMING_UHS_SDR25 4
#define MMC_TIMING_UHS_SDR50 5
#define MMC_TIMING_UHS_SDR104 6
#define MMC_TIMING_UHS_DDR50 7
#define MMC_TIMING_MMC_DDR52 8
#define MMC_TIMING_MMC_HS200 9
#define MMC_TIMING_MMC_HS400 10
#define XENON_MMC_MAX_CLK 400000000
enum soc_pad_ctrl_type {
SOC_PAD_SD,
SOC_PAD_FIXED_1_8V,
};
struct xenon_sdhci_plat {
struct mmc_config cfg;
struct mmc mmc;
};
struct xenon_sdhci_priv {
struct sdhci_host host;
u8 timing;
unsigned int clock;
void *pad_ctrl_reg;
int pad_type;
};
static int xenon_mmc_phy_init(struct sdhci_host *host)
{
struct xenon_sdhci_priv *priv = host->mmc->priv;
u32 clock = priv->clock;
u32 time;
u32 var;
/* Enable QSP PHASE SELECT */
var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
var |= SAMPL_INV_QSP_PHASE_SELECT;
if ((priv->timing == MMC_TIMING_UHS_SDR50) ||
(priv->timing == MMC_TIMING_UHS_SDR25) ||
(priv->timing == MMC_TIMING_UHS_SDR12) ||
(priv->timing == MMC_TIMING_SD_HS) ||
(priv->timing == MMC_TIMING_LEGACY))
var |= EMMC_PHY_SLOW_MODE;
sdhci_writel(host, var, EMMC_PHY_TIMING_ADJUST);
/* Poll for host MMC PHY clock init to be stable */
/* Wait up to 10ms */
time = 100;
while (time--) {
var = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
if (var & SDHCI_CLOCK_INT_STABLE)
break;
udelay(100);
}
if (time <= 0) {
pr_err("Failed to enable MMC internal clock in time\n");
return -ETIMEDOUT;
}
/* Init PHY */
var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
var |= PHY_INITIALIZAION;
sdhci_writel(host, var, EMMC_PHY_TIMING_ADJUST);
if (clock == 0) {
/* Use the possibly slowest bus frequency value */
clock = 100000;
}
/* Poll for host eMMC PHY init to complete */
/* Wait up to 10ms */
time = 100;
while (time--) {
var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
var &= PHY_INITIALIZAION;
if (!var)
break;
/* wait for host eMMC PHY init to complete */
udelay(100);
}
if (time <= 0) {
pr_err("Failed to init MMC PHY in time\n");
return -ETIMEDOUT;
}
return 0;
}
#define ARMADA_3700_SOC_PAD_1_8V 0x1
#define ARMADA_3700_SOC_PAD_3_3V 0x0
static void armada_3700_soc_pad_voltage_set(struct sdhci_host *host)
{
struct xenon_sdhci_priv *priv = host->mmc->priv;
if (priv->pad_type == SOC_PAD_FIXED_1_8V)
writel(ARMADA_3700_SOC_PAD_1_8V, priv->pad_ctrl_reg);
else if (priv->pad_type == SOC_PAD_SD)
writel(ARMADA_3700_SOC_PAD_3_3V, priv->pad_ctrl_reg);
}
static void xenon_mmc_phy_set(struct sdhci_host *host)
{
struct xenon_sdhci_priv *priv = host->mmc->priv;
u32 var;
/* Setup pad, set bit[30], bit[28] and bits[26:24] */
var = sdhci_readl(host, EMMC_PHY_PAD_CONTROL);
var |= AUTO_RECEN_CTRL | OEN_QSN | FC_QSP_RECEN |
FC_CMD_RECEN | FC_DQ_RECEN;
sdhci_writel(host, var, EMMC_PHY_PAD_CONTROL);
/* Set CMD and DQ Pull Up */
var = sdhci_readl(host, EMMC_PHY_PAD_CONTROL1);
var |= (EMMC5_1_FC_CMD_PU | EMMC5_1_FC_DQ_PU);
var &= ~(EMMC5_1_FC_CMD_PD | EMMC5_1_FC_DQ_PD);
sdhci_writel(host, var, EMMC_PHY_PAD_CONTROL1);
/*
* If timing belongs to high speed, set bit[17] of
* EMMC_PHY_TIMING_ADJUST register
*/
if ((priv->timing == MMC_TIMING_MMC_HS400) ||
(priv->timing == MMC_TIMING_MMC_HS200) ||
(priv->timing == MMC_TIMING_UHS_SDR50) ||
(priv->timing == MMC_TIMING_UHS_SDR104) ||
(priv->timing == MMC_TIMING_UHS_DDR50) ||
(priv->timing == MMC_TIMING_UHS_SDR25) ||
(priv->timing == MMC_TIMING_MMC_DDR52)) {
var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
var |= OUTPUT_QSN_PHASE_SELECT;
sdhci_writel(host, var, EMMC_PHY_TIMING_ADJUST);
}
/*
* When setting EMMC_PHY_FUNC_CONTROL register,
* SD clock should be disabled
*/
var = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
var &= ~SDHCI_CLOCK_CARD_EN;
sdhci_writew(host, var, SDHCI_CLOCK_CONTROL);
var = sdhci_readl(host, EMMC_PHY_FUNC_CONTROL);
if (host->mmc->ddr_mode) {
var |= (DQ_DDR_MODE_MASK << DQ_DDR_MODE_SHIFT) | CMD_DDR_MODE;
} else {
var &= ~((DQ_DDR_MODE_MASK << DQ_DDR_MODE_SHIFT) |
CMD_DDR_MODE);
}
sdhci_writel(host, var, EMMC_PHY_FUNC_CONTROL);
/* Enable bus clock */
var = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
var |= SDHCI_CLOCK_CARD_EN;
sdhci_writew(host, var, SDHCI_CLOCK_CONTROL);
xenon_mmc_phy_init(host);
}
/* Enable/Disable the Auto Clock Gating function of this slot */
static void xenon_mmc_set_acg(struct sdhci_host *host, bool enable)
{
u32 var;
var = sdhci_readl(host, SDHC_SYS_OP_CTRL);
if (enable)
var &= ~AUTO_CLKGATE_DISABLE_MASK;
else
var |= AUTO_CLKGATE_DISABLE_MASK;
sdhci_writel(host, var, SDHC_SYS_OP_CTRL);
}
#define SLOT_MASK(slot) BIT(slot)
/* Enable specific slot */
static void xenon_mmc_enable_slot(struct sdhci_host *host, u8 slot)
{
u32 var;
var = sdhci_readl(host, SDHC_SYS_OP_CTRL);
var |= SLOT_MASK(slot) << SLOT_ENABLE_SHIFT;
sdhci_writel(host, var, SDHC_SYS_OP_CTRL);
}
/* Enable Parallel Transfer Mode */
static void xenon_mmc_enable_parallel_tran(struct sdhci_host *host, u8 slot)
{
u32 var;
var = sdhci_readl(host, SDHC_SYS_EXT_OP_CTRL);
var |= SLOT_MASK(slot);
sdhci_writel(host, var, SDHC_SYS_EXT_OP_CTRL);
}
static void xenon_mmc_disable_tuning(struct sdhci_host *host, u8 slot)
{
u32 var;
/* Clear the Re-Tuning Request functionality */
var = sdhci_readl(host, SDHC_SLOT_RETUNING_REQ_CTRL);
var &= ~RETUNING_COMPATIBLE;
sdhci_writel(host, var, SDHC_SLOT_RETUNING_REQ_CTRL);
/* Clear the Re-tuning Event Signal Enable */
var = sdhci_readl(host, SDHCI_SIGNAL_ENABLE);
var &= ~SDHCI_RETUNE_EVT_INTSIG;
sdhci_writel(host, var, SDHCI_SIGNAL_ENABLE);
}
/* Mask command conflict error */
static void xenon_mask_cmd_conflict_err(struct sdhci_host *host)
{
u32 reg;
reg = sdhci_readl(host, SDHC_SYS_EXT_OP_CTRL);
reg |= MASK_CMD_CONFLICT_ERROR;
sdhci_writel(host, reg, SDHC_SYS_EXT_OP_CTRL);
}
/* Platform specific function for post set_ios configuration */
static int xenon_sdhci_set_ios_post(struct sdhci_host *host)
{
struct xenon_sdhci_priv *priv = host->mmc->priv;
uint speed = host->mmc->tran_speed;
int pwr_18v = 0;
if ((sdhci_readb(host, SDHCI_POWER_CONTROL) & ~SDHCI_POWER_ON) ==
SDHCI_POWER_180)
pwr_18v = 1;
/* Set timing variable according to the configured speed */
if (IS_SD(host->mmc)) {
/* SD/SDIO */
if (pwr_18v) {
if (host->mmc->ddr_mode)
priv->timing = MMC_TIMING_UHS_DDR50;
else if (speed <= 25000000)
priv->timing = MMC_TIMING_UHS_SDR25;
else
priv->timing = MMC_TIMING_UHS_SDR50;
} else {
if (speed <= 25000000)
priv->timing = MMC_TIMING_LEGACY;
else
priv->timing = MMC_TIMING_SD_HS;
}
} else {
/* eMMC */
if (host->mmc->ddr_mode)
priv->timing = MMC_TIMING_MMC_DDR52;
else if (speed <= 26000000)
priv->timing = MMC_TIMING_LEGACY;
else
priv->timing = MMC_TIMING_MMC_HS;
}
/* Re-init the PHY */
xenon_mmc_phy_set(host);
return 0;
}
/* Install a driver specific handler for post set_ios configuration */
static const struct sdhci_ops xenon_sdhci_ops = {
.set_ios_post = xenon_sdhci_set_ios_post
};
static int xenon_sdhci_probe(struct udevice *dev)
{
struct xenon_sdhci_plat *plat = dev_get_platdata(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct xenon_sdhci_priv *priv = dev_get_priv(dev);
struct sdhci_host *host = dev_get_priv(dev);
int ret;
host->mmc = &plat->mmc;
host->mmc->priv = host;
host->mmc->dev = dev;
upriv->mmc = host->mmc;
/* Set quirks */
host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_32BIT_DMA_ADDR;
/* Set default timing */
priv->timing = MMC_TIMING_LEGACY;
/* Disable auto clock gating during init */
xenon_mmc_set_acg(host, false);
/* Enable slot */
xenon_mmc_enable_slot(host, XENON_MMC_SLOT_ID_HYPERION);
/*
* Set default power on SoC PHY PAD register (currently only
* available on the Armada 3700)
*/
if (priv->pad_ctrl_reg)
armada_3700_soc_pad_voltage_set(host);
host->host_caps = MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_DDR_52MHz;
switch (fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "bus-width",
1)) {
case 8:
host->host_caps |= MMC_MODE_8BIT;
break;
case 4:
host->host_caps |= MMC_MODE_4BIT;
break;
case 1:
break;
default:
printf("Invalid \"bus-width\" value\n");
return -EINVAL;
}
host->ops = &xenon_sdhci_ops;
host->max_clk = XENON_MMC_MAX_CLK;
ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
if (ret)
return ret;
ret = sdhci_probe(dev);
if (ret)
return ret;
/* Enable parallel transfer */
xenon_mmc_enable_parallel_tran(host, XENON_MMC_SLOT_ID_HYPERION);
/* Disable tuning functionality of this slot */
xenon_mmc_disable_tuning(host, XENON_MMC_SLOT_ID_HYPERION);
/* Enable auto clock gating after init */
xenon_mmc_set_acg(host, true);
xenon_mask_cmd_conflict_err(host);
return ret;
}
static int xenon_sdhci_ofdata_to_platdata(struct udevice *dev)
{
struct sdhci_host *host = dev_get_priv(dev);
struct xenon_sdhci_priv *priv = dev_get_priv(dev);
const char *name;
host->name = dev->name;
host->ioaddr = dev_read_addr_ptr(dev);
if (device_is_compatible(dev, "marvell,armada-3700-sdhci"))
priv->pad_ctrl_reg = (void *)devfdt_get_addr_index(dev, 1);
name = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "marvell,pad-type",
NULL);
if (name) {
if (0 == strncmp(name, "sd", 2)) {
priv->pad_type = SOC_PAD_SD;
} else if (0 == strncmp(name, "fixed-1-8v", 10)) {
priv->pad_type = SOC_PAD_FIXED_1_8V;
} else {
printf("Unsupported SOC PHY PAD ctrl type %s\n", name);
return -EINVAL;
}
}
return 0;
}
static int xenon_sdhci_bind(struct udevice *dev)
{
struct xenon_sdhci_plat *plat = dev_get_platdata(dev);
return sdhci_bind(dev, &plat->mmc, &plat->cfg);
}
static const struct udevice_id xenon_sdhci_ids[] = {
{ .compatible = "marvell,armada-8k-sdhci",},
{ .compatible = "marvell,armada-3700-sdhci",},
{ }
};
U_BOOT_DRIVER(xenon_sdhci_drv) = {
.name = "xenon_sdhci",
.id = UCLASS_MMC,
.of_match = xenon_sdhci_ids,
.ofdata_to_platdata = xenon_sdhci_ofdata_to_platdata,
.ops = &sdhci_ops,
.bind = xenon_sdhci_bind,
.probe = xenon_sdhci_probe,
.priv_auto_alloc_size = sizeof(struct xenon_sdhci_priv),
.platdata_auto_alloc_size = sizeof(struct xenon_sdhci_plat),
};
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