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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Google, Inc
* Copyright 2020 NXP
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <log.h>
#include <malloc.h>
#include <mmc.h>
#include "mmc_private.h"
static struct list_head mmc_devices;
static int cur_dev_num = -1;
#if CONFIG_IS_ENABLED(MMC_TINY)
static struct mmc mmc_static;
struct mmc *find_mmc_device(int dev_num)
{
return &mmc_static;
}
void mmc_do_preinit(void)
{
struct mmc *m = &mmc_static;
if (m->preinit)
mmc_start_init(m);
}
struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
{
return &mmc->block_dev;
}
#else
struct mmc *find_mmc_device(int dev_num)
{
struct mmc *m;
struct list_head *entry;
list_for_each(entry, &mmc_devices) {
m = list_entry(entry, struct mmc, link);
if (m->block_dev.devnum == dev_num)
return m;
}
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
printf("MMC Device %d not found\n", dev_num);
#endif
return NULL;
}
int mmc_get_next_devnum(void)
{
return cur_dev_num++;
}
struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
{
return &mmc->block_dev;
}
int get_mmc_num(void)
{
return cur_dev_num;
}
void mmc_do_preinit(void)
{
struct mmc *m;
struct list_head *entry;
list_for_each(entry, &mmc_devices) {
m = list_entry(entry, struct mmc, link);
if (m->preinit)
mmc_start_init(m);
}
}
#endif
void mmc_list_init(void)
{
INIT_LIST_HEAD(&mmc_devices);
cur_dev_num = 0;
}
void mmc_list_add(struct mmc *mmc)
{
INIT_LIST_HEAD(&mmc->link);
list_add_tail(&mmc->link, &mmc_devices);
}
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
void print_mmc_devices(char separator)
{
struct mmc *m;
struct list_head *entry;
char *mmc_type;
list_for_each(entry, &mmc_devices) {
m = list_entry(entry, struct mmc, link);
if (m->has_init)
mmc_type = IS_SD(m) ? "SD" : "eMMC";
else
mmc_type = NULL;
printf("%s: %d", m->cfg->name, m->block_dev.devnum);
if (mmc_type)
printf(" (%s)", mmc_type);
if (entry->next != &mmc_devices) {
printf("%c", separator);
if (separator != '\n')
puts(" ");
}
}
printf("\n");
}
#else
void print_mmc_devices(char separator) { }
#endif
#if CONFIG_IS_ENABLED(MMC_TINY)
static struct mmc mmc_static = {
.dsr_imp = 0,
.dsr = 0xffffffff,
.block_dev = {
.uclass_id = UCLASS_MMC,
.removable = 1,
.devnum = 0,
.block_read = mmc_bread,
.block_write = mmc_bwrite,
.block_erase = mmc_berase,
.part_type = 0,
},
};
struct mmc *mmc_create(const struct mmc_config *cfg, void *priv)
{
struct mmc *mmc = &mmc_static;
/* First MMC device registered, fail to register a new one.
* Given users are not expecting this to fail, instead
* of failing let's just return the only MMC device
*/
if (mmc->cfg) {
debug("Warning: MMC_TINY doesn't support multiple MMC devices\n");
return mmc;
}
mmc->cfg = cfg;
mmc->priv = priv;
return mmc;
}
void mmc_destroy(struct mmc *mmc)
{
}
#else
struct mmc *mmc_create(const struct mmc_config *cfg, void *priv)
{
struct blk_desc *bdesc;
struct mmc *mmc;
/* quick validation */
if (cfg == NULL || cfg->f_min == 0 ||
cfg->f_max == 0 || cfg->b_max == 0)
return NULL;
#if !CONFIG_IS_ENABLED(DM_MMC)
if (cfg->ops == NULL || cfg->ops->send_cmd == NULL)
return NULL;
#endif
mmc = calloc(1, sizeof(*mmc));
if (mmc == NULL)
return NULL;
mmc->cfg = cfg;
mmc->priv = priv;
/* the following chunk was mmc_register() */
/* Setup dsr related values */
mmc->dsr_imp = 0;
mmc->dsr = 0xffffffff;
/* Setup the universal parts of the block interface just once */
bdesc = mmc_get_blk_desc(mmc);
bdesc->uclass_id = UCLASS_MMC;
bdesc->removable = 1;
bdesc->devnum = mmc_get_next_devnum();
bdesc->block_read = mmc_bread;
bdesc->block_write = mmc_bwrite;
bdesc->block_erase = mmc_berase;
/* setup initial part type */
bdesc->part_type = mmc->cfg->part_type;
mmc_list_add(mmc);
return mmc;
}
void mmc_destroy(struct mmc *mmc)
{
/* only freeing memory for now */
free(mmc);
}
#endif
static int mmc_select_hwpartp(struct blk_desc *desc, int hwpart)
{
struct mmc *mmc = find_mmc_device(desc->devnum);
int ret;
if (!mmc)
return -ENODEV;
if (mmc->block_dev.hwpart == hwpart)
return 0;
if (mmc->part_config == MMCPART_NOAVAILABLE)
return -EMEDIUMTYPE;
ret = mmc_switch_part(mmc, hwpart);
if (ret)
return ret;
return 0;
}
static int mmc_get_dev(int dev, struct blk_desc **descp)
{
struct mmc *mmc = find_mmc_device(dev);
int ret;
if (!mmc)
return -ENODEV;
ret = mmc_init(mmc);
if (ret)
return ret;
*descp = &mmc->block_dev;
return 0;
}
U_BOOT_LEGACY_BLK(mmc) = {
.uclass_idname = "mmc",
.uclass_id = UCLASS_MMC,
.max_devs = -1,
.get_dev = mmc_get_dev,
.select_hwpart = mmc_select_hwpartp,
};
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