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u-boot/drivers/mmc/mmc-uclass.c
Marek Vasut 145429aac0 mmc: Add option to adjust b_max before long read 
Add getter function which permits adjusting the maximum number of
blocks that could be read in a single sustained read transfer based
on the location of the source/target buffer and length, before such
transfer starts.

This is mainly useful on systems which have various DMA restrictions
for different memory locations, e.g. DMA limited to 32bit addresses,
and where a bounce buffer is used to work around such restrictions.
Since the U-Boot bounce buffer is mallocated, it's size is limited
by the malloc area size, and the read transfer to such a buffer must
also be limited. However, as not all areas are limited equally, the
b_max should be adjusted accordinly as needed to avoid degrading
performance unnecessarily.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
2020-04-22 20:41:56 +08:00

484 lines
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.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"
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);
}
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);
}
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);
}
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);
}
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);
}
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
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)
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
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);
}
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);
}
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);
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(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);
}
struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
{
struct blk_desc *desc;
struct udevice *dev;
device_find_first_child(mmc->dev, &dev);
if (!dev)
return NULL;
desc = dev_get_uclass_platdata(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;
#ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
mmc_set_preinit(m, 1);
#endif
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, devnum = -1;
if (!mmc_get_ops(dev))
return -ENOSYS;
#ifndef CONFIG_SPL_BUILD
/* Use the fixed index with aliase node's index */
ret = dev_read_alias_seq(dev, &devnum);
debug("%s: alias ret=%d, devnum=%d\n", __func__, ret, devnum);
#endif
ret = blk_create_devicef(dev, "mmc_blk", "blk", IF_TYPE_MMC,
devnum, 512, 0, &bdev);
if (ret) {
debug("Cannot create block device\n");
return ret;
}
bdesc = dev_get_uclass_platdata(bdev);
mmc->cfg = cfg;
mmc->priv = dev;
/* 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;
return 0;
}
int mmc_unbind(struct udevice *dev)
{
struct udevice *bdev;
device_find_first_child(dev, &bdev);
if (bdev) {
device_remove(bdev, DM_REMOVE_NORMAL);
device_unbind(bdev);
}
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_platdata(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;
}
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_alloc_size = sizeof(struct mmc_uclass_priv),
};
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