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u-boot/drivers/mmc/ftsdc010_mci.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

483 lines
11 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
/*
* Faraday MMC/SD Host Controller
*
* (C) Copyright 2010 Faraday Technology
* Dante Su <dantesu@faraday-tech.com>
*
* Copyright 2018 Andes Technology, Inc.
* Author: Rick Chen (rick@andestech.com)
*/
#include <common.h>
#include <clk.h>
#include <log.h>
#include <malloc.h>
#include <part.h>
#include <mmc.h>
#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/errno.h>
#include <asm/byteorder.h>
#include <faraday/ftsdc010.h>
#include "ftsdc010_mci.h"
#include <dm.h>
#include <dt-structs.h>
#include <errno.h>
#include <mapmem.h>
#include <pwrseq.h>
#include <syscon.h>
#include <linux/err.h>
DECLARE_GLOBAL_DATA_PTR;
#define CFG_CMD_TIMEOUT (CONFIG_SYS_HZ >> 4) /* 250 ms */
#define CFG_RST_TIMEOUT CONFIG_SYS_HZ /* 1 sec reset timeout */
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct ftsdc010 {
fdt32_t bus_width;
bool cap_mmc_highspeed;
bool cap_sd_highspeed;
fdt32_t clock_freq_min_max[2];
struct phandle_2_cell clocks[4];
fdt32_t fifo_depth;
fdt32_t reg[2];
};
#endif
struct ftsdc010_plat {
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct ftsdc010 dtplat;
#endif
struct mmc_config cfg;
struct mmc mmc;
};
struct ftsdc_priv {
struct clk clk;
struct ftsdc010_chip chip;
int fifo_depth;
bool fifo_mode;
u32 minmax[2];
};
static inline int ftsdc010_send_cmd(struct mmc *mmc, struct mmc_cmd *mmc_cmd)
{
struct ftsdc010_chip *chip = mmc->priv;
struct ftsdc010_mmc __iomem *regs = chip->regs;
int ret = -ETIMEDOUT;
uint32_t ts, st;
uint32_t cmd = FTSDC010_CMD_IDX(mmc_cmd->cmdidx);
uint32_t arg = mmc_cmd->cmdarg;
uint32_t flags = mmc_cmd->resp_type;
cmd |= FTSDC010_CMD_CMD_EN;
if (chip->acmd) {
cmd |= FTSDC010_CMD_APP_CMD;
chip->acmd = 0;
}
if (flags & MMC_RSP_PRESENT)
cmd |= FTSDC010_CMD_NEED_RSP;
if (flags & MMC_RSP_136)
cmd |= FTSDC010_CMD_LONG_RSP;
writel(FTSDC010_STATUS_RSP_MASK | FTSDC010_STATUS_CMD_SEND,
&regs->clr);
writel(arg, &regs->argu);
writel(cmd, &regs->cmd);
if (!(flags & (MMC_RSP_PRESENT | MMC_RSP_136))) {
for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) {
if (readl(&regs->status) & FTSDC010_STATUS_CMD_SEND) {
writel(FTSDC010_STATUS_CMD_SEND, &regs->clr);
ret = 0;
break;
}
}
} else {
st = 0;
for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) {
st = readl(&regs->status);
writel(st & FTSDC010_STATUS_RSP_MASK, &regs->clr);
if (st & FTSDC010_STATUS_RSP_MASK)
break;
}
if (st & FTSDC010_STATUS_RSP_CRC_OK) {
if (flags & MMC_RSP_136) {
mmc_cmd->response[0] = readl(&regs->rsp3);
mmc_cmd->response[1] = readl(&regs->rsp2);
mmc_cmd->response[2] = readl(&regs->rsp1);
mmc_cmd->response[3] = readl(&regs->rsp0);
} else {
mmc_cmd->response[0] = readl(&regs->rsp0);
}
ret = 0;
} else {
debug("ftsdc010: rsp err (cmd=%d, st=0x%x)\n",
mmc_cmd->cmdidx, st);
}
}
if (ret) {
debug("ftsdc010: cmd timeout (op code=%d)\n",
mmc_cmd->cmdidx);
} else if (mmc_cmd->cmdidx == MMC_CMD_APP_CMD) {
chip->acmd = 1;
}
return ret;
}
static void ftsdc010_clkset(struct mmc *mmc, uint32_t rate)
{
struct ftsdc010_chip *chip = mmc->priv;
struct ftsdc010_mmc __iomem *regs = chip->regs;
uint32_t div;
for (div = 0; div < 0x7f; ++div) {
if (rate >= chip->sclk / (2 * (div + 1)))
break;
}
chip->rate = chip->sclk / (2 * (div + 1));
writel(FTSDC010_CCR_CLK_DIV(div), &regs->ccr);
if (IS_SD(mmc)) {
setbits_le32(&regs->ccr, FTSDC010_CCR_CLK_SD);
if (chip->rate > 25000000)
setbits_le32(&regs->ccr, FTSDC010_CCR_CLK_HISPD);
else
clrbits_le32(&regs->ccr, FTSDC010_CCR_CLK_HISPD);
}
}
static int ftsdc010_wait(struct ftsdc010_mmc __iomem *regs, uint32_t mask)
{
int ret = -ETIMEDOUT;
uint32_t st, timeout = 10000000;
while (timeout--) {
st = readl(&regs->status);
if (!(st & mask))
continue;
writel(st & mask, &regs->clr);
ret = 0;
break;
}
if (ret){
debug("ftsdc010: wait st(0x%x) timeout\n", mask);
}
return ret;
}
/*
* u-boot mmc api
*/
static int ftsdc010_request(struct udevice *dev, struct mmc_cmd *cmd,
struct mmc_data *data)
{
struct mmc *mmc = mmc_get_mmc_dev(dev);
int ret = -EOPNOTSUPP;
uint32_t len = 0;
struct ftsdc010_chip *chip = mmc->priv;
struct ftsdc010_mmc __iomem *regs = chip->regs;
if (data && (data->flags & MMC_DATA_WRITE) && chip->wprot) {
printf("ftsdc010: the card is write protected!\n");
return ret;
}
if (data) {
uint32_t dcr;
len = data->blocksize * data->blocks;
/* 1. data disable + fifo reset */
dcr = 0;
#ifdef CONFIG_FTSDC010_SDIO
dcr |= FTSDC010_DCR_FIFO_RST;
#endif
writel(dcr, &regs->dcr);
/* 2. clear status register */
writel(FTSDC010_STATUS_DATA_MASK | FTSDC010_STATUS_FIFO_URUN
| FTSDC010_STATUS_FIFO_ORUN, &regs->clr);
/* 3. data timeout (1 sec) */
writel(chip->rate, &regs->dtr);
/* 4. data length (bytes) */
writel(len, &regs->dlr);
/* 5. data enable */
dcr = (ffs(data->blocksize) - 1) | FTSDC010_DCR_DATA_EN;
if (data->flags & MMC_DATA_WRITE)
dcr |= FTSDC010_DCR_DATA_WRITE;
writel(dcr, &regs->dcr);
}
ret = ftsdc010_send_cmd(mmc, cmd);
if (ret) {
printf("ftsdc010: CMD%d failed\n", cmd->cmdidx);
return ret;
}
if (!data)
return ret;
if (data->flags & MMC_DATA_WRITE) {
const uint8_t *buf = (const uint8_t *)data->src;
while (len > 0) {
int wlen;
/* wait for tx ready */
ret = ftsdc010_wait(regs, FTSDC010_STATUS_FIFO_URUN);
if (ret)
break;
/* write bytes to ftsdc010 */
for (wlen = 0; wlen < len && wlen < chip->fifo; ) {
writel(*(uint32_t *)buf, &regs->dwr);
buf += 4;
wlen += 4;
}
len -= wlen;
}
} else {
uint8_t *buf = (uint8_t *)data->dest;
while (len > 0) {
int rlen;
/* wait for rx ready */
ret = ftsdc010_wait(regs, FTSDC010_STATUS_FIFO_ORUN);
if (ret)
break;
/* fetch bytes from ftsdc010 */
for (rlen = 0; rlen < len && rlen < chip->fifo; ) {
*(uint32_t *)buf = readl(&regs->dwr);
buf += 4;
rlen += 4;
}
len -= rlen;
}
}
if (!ret) {
ret = ftsdc010_wait(regs,
FTSDC010_STATUS_DATA_END | FTSDC010_STATUS_DATA_CRC_OK);
}
return ret;
}
static int ftsdc010_set_ios(struct udevice *dev)
{
struct mmc *mmc = mmc_get_mmc_dev(dev);
struct ftsdc010_chip *chip = mmc->priv;
struct ftsdc010_mmc __iomem *regs = chip->regs;
ftsdc010_clkset(mmc, mmc->clock);
clrbits_le32(&regs->bwr, FTSDC010_BWR_MODE_MASK);
switch (mmc->bus_width) {
case 4:
setbits_le32(&regs->bwr, FTSDC010_BWR_MODE_4BIT);
break;
case 8:
setbits_le32(&regs->bwr, FTSDC010_BWR_MODE_8BIT);
break;
default:
setbits_le32(&regs->bwr, FTSDC010_BWR_MODE_1BIT);
break;
}
return 0;
}
static int ftsdc010_get_cd(struct udevice *dev)
{
struct mmc *mmc = mmc_get_mmc_dev(dev);
struct ftsdc010_chip *chip = mmc->priv;
struct ftsdc010_mmc __iomem *regs = chip->regs;
return !(readl(&regs->status) & FTSDC010_STATUS_CARD_DETECT);
}
static int ftsdc010_get_wp(struct udevice *dev)
{
struct mmc *mmc = mmc_get_mmc_dev(dev);
struct ftsdc010_chip *chip = mmc->priv;
struct ftsdc010_mmc __iomem *regs = chip->regs;
if (readl(&regs->status) & FTSDC010_STATUS_WRITE_PROT) {
printf("ftsdc010: write protected\n");
chip->wprot = 1;
}
return 0;
}
static int ftsdc010_init(struct mmc *mmc)
{
struct ftsdc010_chip *chip = mmc->priv;
struct ftsdc010_mmc __iomem *regs = chip->regs;
uint32_t ts;
chip->fifo = (readl(&regs->feature) & 0xff) << 2;
/* 1. chip reset */
writel(FTSDC010_CMD_SDC_RST, &regs->cmd);
for (ts = get_timer(0); get_timer(ts) < CFG_RST_TIMEOUT; ) {
if (readl(&regs->cmd) & FTSDC010_CMD_SDC_RST)
continue;
break;
}
if (readl(&regs->cmd) & FTSDC010_CMD_SDC_RST) {
printf("ftsdc010: reset failed\n");
return -EOPNOTSUPP;
}
/* 2. enter low speed mode (400k card detection) */
ftsdc010_clkset(mmc, 400000);
/* 3. interrupt disabled */
writel(0, &regs->int_mask);
return 0;
}
static int ftsdc010_probe(struct udevice *dev)
{
struct mmc *mmc = mmc_get_mmc_dev(dev);
return ftsdc010_init(mmc);
}
const struct dm_mmc_ops dm_ftsdc010_mmc_ops = {
.send_cmd = ftsdc010_request,
.set_ios = ftsdc010_set_ios,
.get_cd = ftsdc010_get_cd,
.get_wp = ftsdc010_get_wp,
};
static void ftsdc_setup_cfg(struct mmc_config *cfg, const char *name, int buswidth,
uint caps, u32 max_clk, u32 min_clk)
{
cfg->name = name;
cfg->f_min = min_clk;
cfg->f_max = max_clk;
cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
cfg->host_caps = caps;
if (buswidth == 8) {
cfg->host_caps |= MMC_MODE_8BIT;
cfg->host_caps &= ~MMC_MODE_4BIT;
} else {
cfg->host_caps |= MMC_MODE_4BIT;
cfg->host_caps &= ~MMC_MODE_8BIT;
}
cfg->part_type = PART_TYPE_DOS;
cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
}
static int ftsdc010_mmc_ofdata_to_platdata(struct udevice *dev)
{
#if !CONFIG_IS_ENABLED(OF_PLATDATA)
struct ftsdc_priv *priv = dev_get_priv(dev);
struct ftsdc010_chip *chip = &priv->chip;
chip->name = dev->name;
chip->ioaddr = dev_read_addr_ptr(dev);
chip->buswidth = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
"bus-width", 4);
chip->priv = dev;
priv->fifo_depth = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
"fifo-depth", 0);
priv->fifo_mode = fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
"fifo-mode");
if (fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev),
"clock-freq-min-max", priv->minmax, 2)) {
int val = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
"max-frequency", -EINVAL);
if (val < 0)
return val;
priv->minmax[0] = 400000; /* 400 kHz */
priv->minmax[1] = val;
} else {
debug("%s: 'clock-freq-min-max' property was deprecated.\n",
__func__);
}
#endif
chip->sclk = priv->minmax[1];
chip->regs = chip->ioaddr;
return 0;
}
static int ftsdc010_mmc_probe(struct udevice *dev)
{
struct ftsdc010_plat *plat = dev_get_platdata(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct ftsdc_priv *priv = dev_get_priv(dev);
struct ftsdc010_chip *chip = &priv->chip;
struct udevice *pwr_dev __maybe_unused;
#if CONFIG_IS_ENABLED(OF_PLATDATA)
int ret;
struct ftsdc010 *dtplat = &plat->dtplat;
chip->name = dev->name;
chip->ioaddr = map_sysmem(dtplat->reg[0], dtplat->reg[1]);
chip->buswidth = dtplat->bus_width;
chip->priv = dev;
chip->dev_index = 1;
memcpy(priv->minmax, dtplat->clock_freq_min_max, sizeof(priv->minmax));
ret = clk_get_by_driver_info(dev, dtplat->clocks, &priv->clk);
if (ret < 0)
return ret;
#endif
if (dev_read_bool(dev, "cap-mmc-highspeed") || \
dev_read_bool(dev, "cap-sd-highspeed"))
chip->caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;
ftsdc_setup_cfg(&plat->cfg, dev->name, chip->buswidth, chip->caps,
priv->minmax[1] , priv->minmax[0]);
chip->mmc = &plat->mmc;
chip->mmc->priv = &priv->chip;
chip->mmc->dev = dev;
upriv->mmc = chip->mmc;
return ftsdc010_probe(dev);
}
int ftsdc010_mmc_bind(struct udevice *dev)
{
struct ftsdc010_plat *plat = dev_get_platdata(dev);
return mmc_bind(dev, &plat->mmc, &plat->cfg);
}
static const struct udevice_id ftsdc010_mmc_ids[] = {
{ .compatible = "andestech,atfsdc010" },
{ }
};
U_BOOT_DRIVER(ftsdc010_mmc) = {
.name = "ftsdc010_mmc",
.id = UCLASS_MMC,
.of_match = ftsdc010_mmc_ids,
.ofdata_to_platdata = ftsdc010_mmc_ofdata_to_platdata,
.ops = &dm_ftsdc010_mmc_ops,
.bind = ftsdc010_mmc_bind,
.probe = ftsdc010_mmc_probe,
.priv_auto_alloc_size = sizeof(struct ftsdc_priv),
.platdata_auto_alloc_size = sizeof(struct ftsdc010_plat),
};
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