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u-boot/drivers/mmc/mmc-uclass.c
Simon Glass b8aa463e9b bootstd: mmc: Add a bootdev driver 
Add a bootdev driver for MMC. It mostly just calls the bootdev helper
function.

Add a function to obtain the block device for an MMC controller.

Fix up the comment for mmc_get_blk_desc() while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>
2022-04-25 10:00:04 -04:00

550 lines
12 KiB
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Google, Inc
* Copyright 2020 NXP
* Written by Simon Glass <sjg@chromium.org>
*/
#define LOG_CATEGORY UCLASS_MMC
#include <common.h>
#include <bootdev.h>
#include <log.h>
#include <mmc.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/device_compat.h>
#include <dm/lists.h>
#include <linux/compat.h>
#include "mmc_private.h"
static int dm_mmc_get_b_max(struct udevice *dev, void *dst, lbaint_t blkcnt)
{
struct dm_mmc_ops *ops = mmc_get_ops(dev);
struct mmc *mmc = mmc_get_mmc_dev(dev);
if (ops->get_b_max)
return ops->get_b_max(dev, dst, blkcnt);
else
return mmc->cfg->b_max;
}
int mmc_get_b_max(struct mmc *mmc, void *dst, lbaint_t blkcnt)
{
return dm_mmc_get_b_max(mmc->dev, dst, blkcnt);
}
static int dm_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
struct mmc_data *data)
{
struct mmc *mmc = mmc_get_mmc_dev(dev);
struct dm_mmc_ops *ops = mmc_get_ops(dev);
int ret;
mmmc_trace_before_send(mmc, cmd);
if (ops->send_cmd)
ret = ops->send_cmd(dev, cmd, data);
else
ret = -ENOSYS;
mmmc_trace_after_send(mmc, cmd, ret);
return ret;
}
int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
{
return dm_mmc_send_cmd(mmc->dev, cmd, data);
}
static int dm_mmc_set_ios(struct udevice *dev)
{
struct dm_mmc_ops *ops = mmc_get_ops(dev);
if (!ops->set_ios)
return -ENOSYS;
return ops->set_ios(dev);
}
int mmc_set_ios(struct mmc *mmc)
{
return dm_mmc_set_ios(mmc->dev);
}
static int dm_mmc_wait_dat0(struct udevice *dev, int state, int timeout_us)
{
struct dm_mmc_ops *ops = mmc_get_ops(dev);
if (!ops->wait_dat0)
return -ENOSYS;
return ops->wait_dat0(dev, state, timeout_us);
}
int mmc_wait_dat0(struct mmc *mmc, int state, int timeout_us)
{
return dm_mmc_wait_dat0(mmc->dev, state, timeout_us);
}
static int dm_mmc_get_wp(struct udevice *dev)
{
struct dm_mmc_ops *ops = mmc_get_ops(dev);
if (!ops->get_wp)
return -ENOSYS;
return ops->get_wp(dev);
}
int mmc_getwp(struct mmc *mmc)
{
return dm_mmc_get_wp(mmc->dev);
}
static int dm_mmc_get_cd(struct udevice *dev)
{
struct dm_mmc_ops *ops = mmc_get_ops(dev);
if (!ops->get_cd)
return -ENOSYS;
return ops->get_cd(dev);
}
int mmc_getcd(struct mmc *mmc)
{
return dm_mmc_get_cd(mmc->dev);
}
#ifdef MMC_SUPPORTS_TUNING
static int dm_mmc_execute_tuning(struct udevice *dev, uint opcode)
{
struct dm_mmc_ops *ops = mmc_get_ops(dev);
if (!ops->execute_tuning)
return -ENOSYS;
return ops->execute_tuning(dev, opcode);
}
int mmc_execute_tuning(struct mmc *mmc, uint opcode)
{
return dm_mmc_execute_tuning(mmc->dev, opcode);
}
#endif
#if CONFIG_IS_ENABLED(MMC_HS400_ES_SUPPORT)
static int dm_mmc_set_enhanced_strobe(struct udevice *dev)
{
struct dm_mmc_ops *ops = mmc_get_ops(dev);
if (ops->set_enhanced_strobe)
return ops->set_enhanced_strobe(dev);
return -ENOTSUPP;
}
int mmc_set_enhanced_strobe(struct mmc *mmc)
{
return dm_mmc_set_enhanced_strobe(mmc->dev);
}
#endif
static int dm_mmc_hs400_prepare_ddr(struct udevice *dev)
{
struct dm_mmc_ops *ops = mmc_get_ops(dev);
if (ops->hs400_prepare_ddr)
return ops->hs400_prepare_ddr(dev);
return 0;
}
int mmc_hs400_prepare_ddr(struct mmc *mmc)
{
return dm_mmc_hs400_prepare_ddr(mmc->dev);
}
static int dm_mmc_host_power_cycle(struct udevice *dev)
{
struct dm_mmc_ops *ops = mmc_get_ops(dev);
if (ops->host_power_cycle)
return ops->host_power_cycle(dev);
return 0;
}
int mmc_host_power_cycle(struct mmc *mmc)
{
return dm_mmc_host_power_cycle(mmc->dev);
}
static int dm_mmc_deferred_probe(struct udevice *dev)
{
struct dm_mmc_ops *ops = mmc_get_ops(dev);
if (ops->deferred_probe)
return ops->deferred_probe(dev);
return 0;
}
int mmc_deferred_probe(struct mmc *mmc)
{
return dm_mmc_deferred_probe(mmc->dev);
}
static int dm_mmc_reinit(struct udevice *dev)
{
struct dm_mmc_ops *ops = mmc_get_ops(dev);
if (ops->reinit)
return ops->reinit(dev);
return 0;
}
int mmc_reinit(struct mmc *mmc)
{
return dm_mmc_reinit(mmc->dev);
}
int mmc_of_parse(struct udevice *dev, struct mmc_config *cfg)
{
int val;
val = dev_read_u32_default(dev, "bus-width", 1);
switch (val) {
case 0x8:
cfg->host_caps |= MMC_MODE_8BIT;
/* fall through */
case 0x4:
cfg->host_caps |= MMC_MODE_4BIT;
/* fall through */
case 0x1:
cfg->host_caps |= MMC_MODE_1BIT;
break;
default:
dev_err(dev, "Invalid \"bus-width\" value %u!\n", val);
return -EINVAL;
}
/* f_max is obtained from the optional "max-frequency" property */
dev_read_u32(dev, "max-frequency", &cfg->f_max);
if (dev_read_bool(dev, "cap-sd-highspeed"))
cfg->host_caps |= MMC_CAP(SD_HS);
if (dev_read_bool(dev, "cap-mmc-highspeed"))
cfg->host_caps |= MMC_CAP(MMC_HS) | MMC_CAP(MMC_HS_52);
if (dev_read_bool(dev, "sd-uhs-sdr12"))
cfg->host_caps |= MMC_CAP(UHS_SDR12);
if (dev_read_bool(dev, "sd-uhs-sdr25"))
cfg->host_caps |= MMC_CAP(UHS_SDR25);
if (dev_read_bool(dev, "sd-uhs-sdr50"))
cfg->host_caps |= MMC_CAP(UHS_SDR50);
if (dev_read_bool(dev, "sd-uhs-sdr104"))
cfg->host_caps |= MMC_CAP(UHS_SDR104);
if (dev_read_bool(dev, "sd-uhs-ddr50"))
cfg->host_caps |= MMC_CAP(UHS_DDR50);
if (dev_read_bool(dev, "mmc-ddr-1_8v"))
cfg->host_caps |= MMC_CAP(MMC_DDR_52);
if (dev_read_bool(dev, "mmc-ddr-1_2v"))
cfg->host_caps |= MMC_CAP(MMC_DDR_52);
if (dev_read_bool(dev, "mmc-hs200-1_8v"))
cfg->host_caps |= MMC_CAP(MMC_HS_200);
if (dev_read_bool(dev, "mmc-hs200-1_2v"))
cfg->host_caps |= MMC_CAP(MMC_HS_200);
if (dev_read_bool(dev, "mmc-hs400-1_8v"))
cfg->host_caps |= MMC_CAP(MMC_HS_400);
if (dev_read_bool(dev, "mmc-hs400-1_2v"))
cfg->host_caps |= MMC_CAP(MMC_HS_400);
if (dev_read_bool(dev, "mmc-hs400-enhanced-strobe"))
cfg->host_caps |= MMC_CAP(MMC_HS_400_ES);
if (dev_read_bool(dev, "non-removable")) {
cfg->host_caps |= MMC_CAP_NONREMOVABLE;
} else {
if (dev_read_bool(dev, "cd-inverted"))
cfg->host_caps |= MMC_CAP_CD_ACTIVE_HIGH;
if (dev_read_bool(dev, "broken-cd"))
cfg->host_caps |= MMC_CAP_NEEDS_POLL;
}
if (dev_read_bool(dev, "no-1-8-v")) {
cfg->host_caps &= ~(UHS_CAPS | MMC_MODE_HS200 |
MMC_MODE_HS400 | MMC_MODE_HS400_ES);
}
return 0;
}
struct mmc *mmc_get_mmc_dev(const struct udevice *dev)
{
struct mmc_uclass_priv *upriv;
if (!device_active(dev))
return NULL;
upriv = dev_get_uclass_priv(dev);
return upriv->mmc;
}
#if CONFIG_IS_ENABLED(BLK)
struct mmc *find_mmc_device(int dev_num)
{
struct udevice *dev, *mmc_dev;
int ret;
ret = blk_find_device(IF_TYPE_MMC, dev_num, &dev);
if (ret) {
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
printf("MMC Device %d not found\n", dev_num);
#endif
return NULL;
}
mmc_dev = dev_get_parent(dev);
struct mmc *mmc = mmc_get_mmc_dev(mmc_dev);
return mmc;
}
int get_mmc_num(void)
{
return max((blk_find_max_devnum(IF_TYPE_MMC) + 1), 0);
}
int mmc_get_next_devnum(void)
{
return blk_find_max_devnum(IF_TYPE_MMC);
}
int mmc_get_blk(struct udevice *dev, struct udevice **blkp)
{
struct udevice *blk;
int ret;
device_find_first_child_by_uclass(dev, UCLASS_BLK, &blk);
ret = device_probe(blk);
if (ret)
return ret;
*blkp = blk;
return 0;
}
struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
{
struct blk_desc *desc;
struct udevice *dev;
device_find_first_child_by_uclass(mmc->dev, UCLASS_BLK, &dev);
if (!dev)
return NULL;
desc = dev_get_uclass_plat(dev);
return desc;
}
void mmc_do_preinit(void)
{
struct udevice *dev;
struct uclass *uc;
int ret;
ret = uclass_get(UCLASS_MMC, &uc);
if (ret)
return;
uclass_foreach_dev(dev, uc) {
struct mmc *m = mmc_get_mmc_dev(dev);
if (!m)
continue;
m->user_speed_mode = MMC_MODES_END; /* Initialising user set speed mode */
if (m->preinit)
mmc_start_init(m);
}
}
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
void print_mmc_devices(char separator)
{
struct udevice *dev;
char *mmc_type;
bool first = true;
for (uclass_first_device(UCLASS_MMC, &dev);
dev;
uclass_next_device(&dev), first = false) {
struct mmc *m = mmc_get_mmc_dev(dev);
if (!first) {
printf("%c", separator);
if (separator != '\n')
puts(" ");
}
if (m->has_init)
mmc_type = IS_SD(m) ? "SD" : "eMMC";
else
mmc_type = NULL;
printf("%s: %d", m->cfg->name, mmc_get_blk_desc(m)->devnum);
if (mmc_type)
printf(" (%s)", mmc_type);
}
printf("\n");
}
#else
void print_mmc_devices(char separator) { }
#endif
int mmc_bind(struct udevice *dev, struct mmc *mmc, const struct mmc_config *cfg)
{
struct blk_desc *bdesc;
struct udevice *bdev;
int ret;
if (!mmc_get_ops(dev))
return -ENOSYS;
/* Use the fixed index with aliases node's index */
debug("%s: alias devnum=%d\n", __func__, dev_seq(dev));
ret = blk_create_devicef(dev, "mmc_blk", "blk", IF_TYPE_MMC,
dev_seq(dev), 512, 0, &bdev);
if (ret) {
debug("Cannot create block device\n");
return ret;
}
bdesc = dev_get_uclass_plat(bdev);
mmc->cfg = cfg;
mmc->priv = dev;
ret = bootdev_setup_for_dev(dev, "mmc_bootdev");
if (ret)
return log_msg_ret("bootdev", ret);
/* the following chunk was from mmc_register() */
/* Setup dsr related values */
mmc->dsr_imp = 0;
mmc->dsr = 0xffffffff;
/* Setup the universal parts of the block interface just once */
bdesc->removable = 1;
/* setup initial part type */
bdesc->part_type = cfg->part_type;
mmc->dev = dev;
mmc->user_speed_mode = MMC_MODES_END;
return 0;
}
int mmc_unbind(struct udevice *dev)
{
struct udevice *bdev;
int ret;
device_find_first_child_by_uclass(dev, UCLASS_BLK, &bdev);
if (bdev) {
device_remove(bdev, DM_REMOVE_NORMAL);
device_unbind(bdev);
}
ret = bootdev_unbind_dev(dev);
if (ret)
return log_msg_ret("bootdev", ret);
return 0;
}
static int mmc_select_hwpart(struct udevice *bdev, int hwpart)
{
struct udevice *mmc_dev = dev_get_parent(bdev);
struct mmc *mmc = mmc_get_mmc_dev(mmc_dev);
struct blk_desc *desc = dev_get_uclass_plat(bdev);
int ret;
if (desc->hwpart == hwpart)
return 0;
if (mmc->part_config == MMCPART_NOAVAILABLE)
return -EMEDIUMTYPE;
ret = mmc_switch_part(mmc, hwpart);
if (!ret)
blkcache_invalidate(desc->if_type, desc->devnum);
return ret;
}
static int mmc_blk_probe(struct udevice *dev)
{
struct udevice *mmc_dev = dev_get_parent(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(mmc_dev);
struct mmc *mmc = upriv->mmc;
int ret;
ret = mmc_init(mmc);
if (ret) {
debug("%s: mmc_init() failed (err=%d)\n", __func__, ret);
return ret;
}
ret = device_probe(dev);
if (ret) {
debug("Probing %s failed (err=%d)\n", dev->name, ret);
if (CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) ||
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) ||
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT))
mmc_deinit(mmc);
return ret;
}
return 0;
}
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
static int mmc_blk_remove(struct udevice *dev)
{
struct udevice *mmc_dev = dev_get_parent(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(mmc_dev);
struct mmc *mmc = upriv->mmc;
return mmc_deinit(mmc);
}
#endif
static const struct blk_ops mmc_blk_ops = {
.read = mmc_bread,
#if CONFIG_IS_ENABLED(MMC_WRITE)
.write = mmc_bwrite,
.erase = mmc_berase,
#endif
.select_hwpart = mmc_select_hwpart,
};
U_BOOT_DRIVER(mmc_blk) = {
.name = "mmc_blk",
.id = UCLASS_BLK,
.ops = &mmc_blk_ops,
.probe = mmc_blk_probe,
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
.remove = mmc_blk_remove,
.flags = DM_FLAG_OS_PREPARE,
#endif
};
#endif /* CONFIG_BLK */
UCLASS_DRIVER(mmc) = {
.id = UCLASS_MMC,
.name = "mmc",
.flags = DM_UC_FLAG_SEQ_ALIAS,
.per_device_auto = sizeof(struct mmc_uclass_priv),
};
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