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![Marek Vasut](/assets/img/avatar_default.png)
Drop all the extra content from the MMC core, so that tiny MMC support is really tiny, no fancy anything. That means the tiny MMC support does only 1-bit transfers at default speed settings. Moreover, this patch drops duplicate instance of struct mmc mmc_static, which wasted about 360 bytes. Furthermore, since MMC tiny supports only one controller at all times, get rid of mallocating the ext csd backup and replace it with static array. All in all, this patch saves ~4 kiB of bloat from the MMC core, which on platforms with severe limitations can be beneficial. Signed-off-by: Marek Vasut <marek.vasut@gmail.com> Cc: Jaehoon Chung <jh80.chung@samsung.com> [trini: Fixup checkpatch.pl style warnings] Signed-off-by: Tom Rini <trini@konsulko.com>
257 lines
4.5 KiB
C
257 lines
4.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <common.h>
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#include <malloc.h>
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#include <mmc.h>
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#include "mmc_private.h"
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static struct list_head mmc_devices;
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static int cur_dev_num = -1;
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#if CONFIG_IS_ENABLED(MMC_TINY)
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static struct mmc mmc_static;
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struct mmc *find_mmc_device(int dev_num)
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{
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return &mmc_static;
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}
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void mmc_do_preinit(void)
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{
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struct mmc *m = &mmc_static;
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#ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
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mmc_set_preinit(m, 1);
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#endif
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if (m->preinit)
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mmc_start_init(m);
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}
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struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
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{
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return &mmc->block_dev;
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}
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#else
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struct mmc *find_mmc_device(int dev_num)
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{
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struct mmc *m;
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struct list_head *entry;
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list_for_each(entry, &mmc_devices) {
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m = list_entry(entry, struct mmc, link);
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if (m->block_dev.devnum == dev_num)
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return m;
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}
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#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
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printf("MMC Device %d not found\n", dev_num);
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#endif
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return NULL;
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}
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int mmc_get_next_devnum(void)
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{
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return cur_dev_num++;
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}
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struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
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{
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return &mmc->block_dev;
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}
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int get_mmc_num(void)
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{
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return cur_dev_num;
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}
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void mmc_do_preinit(void)
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{
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struct mmc *m;
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struct list_head *entry;
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list_for_each(entry, &mmc_devices) {
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m = list_entry(entry, struct mmc, link);
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#ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
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mmc_set_preinit(m, 1);
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#endif
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if (m->preinit)
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mmc_start_init(m);
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}
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}
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#endif
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void mmc_list_init(void)
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{
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INIT_LIST_HEAD(&mmc_devices);
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cur_dev_num = 0;
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}
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void mmc_list_add(struct mmc *mmc)
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{
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INIT_LIST_HEAD(&mmc->link);
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list_add_tail(&mmc->link, &mmc_devices);
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}
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#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
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void print_mmc_devices(char separator)
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{
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struct mmc *m;
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struct list_head *entry;
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char *mmc_type;
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list_for_each(entry, &mmc_devices) {
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m = list_entry(entry, struct mmc, link);
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if (m->has_init)
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mmc_type = IS_SD(m) ? "SD" : "eMMC";
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else
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mmc_type = NULL;
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printf("%s: %d", m->cfg->name, m->block_dev.devnum);
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if (mmc_type)
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printf(" (%s)", mmc_type);
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if (entry->next != &mmc_devices) {
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printf("%c", separator);
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if (separator != '\n')
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puts(" ");
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}
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}
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printf("\n");
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}
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#else
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void print_mmc_devices(char separator) { }
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#endif
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#if CONFIG_IS_ENABLED(MMC_TINY)
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static struct mmc mmc_static = {
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.dsr_imp = 0,
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.dsr = 0xffffffff,
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.block_dev = {
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.if_type = IF_TYPE_MMC,
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.removable = 1,
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.devnum = 0,
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.block_read = mmc_bread,
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.block_write = mmc_bwrite,
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.block_erase = mmc_berase,
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.part_type = 0,
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},
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};
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struct mmc *mmc_create(const struct mmc_config *cfg, void *priv)
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{
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struct mmc *mmc = &mmc_static;
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mmc->cfg = cfg;
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mmc->priv = priv;
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return mmc;
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}
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void mmc_destroy(struct mmc *mmc)
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{
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}
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#else
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struct mmc *mmc_create(const struct mmc_config *cfg, void *priv)
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{
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struct blk_desc *bdesc;
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struct mmc *mmc;
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/* quick validation */
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if (cfg == NULL || cfg->f_min == 0 ||
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cfg->f_max == 0 || cfg->b_max == 0)
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return NULL;
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#if !CONFIG_IS_ENABLED(DM_MMC)
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if (cfg->ops == NULL || cfg->ops->send_cmd == NULL)
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return NULL;
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#endif
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mmc = calloc(1, sizeof(*mmc));
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if (mmc == NULL)
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return NULL;
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mmc->cfg = cfg;
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mmc->priv = priv;
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/* the following chunk was mmc_register() */
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/* Setup dsr related values */
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mmc->dsr_imp = 0;
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mmc->dsr = 0xffffffff;
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/* Setup the universal parts of the block interface just once */
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bdesc = mmc_get_blk_desc(mmc);
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bdesc->if_type = IF_TYPE_MMC;
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bdesc->removable = 1;
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bdesc->devnum = mmc_get_next_devnum();
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bdesc->block_read = mmc_bread;
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bdesc->block_write = mmc_bwrite;
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bdesc->block_erase = mmc_berase;
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/* setup initial part type */
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bdesc->part_type = mmc->cfg->part_type;
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mmc_list_add(mmc);
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return mmc;
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}
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void mmc_destroy(struct mmc *mmc)
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{
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/* only freeing memory for now */
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free(mmc);
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}
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#endif
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static int mmc_select_hwpartp(struct blk_desc *desc, int hwpart)
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{
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struct mmc *mmc = find_mmc_device(desc->devnum);
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int ret;
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if (!mmc)
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return -ENODEV;
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if (mmc->block_dev.hwpart == hwpart)
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return 0;
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if (mmc->part_config == MMCPART_NOAVAILABLE)
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return -EMEDIUMTYPE;
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ret = mmc_switch_part(mmc, hwpart);
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if (ret)
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return ret;
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return 0;
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}
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static int mmc_get_dev(int dev, struct blk_desc **descp)
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{
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struct mmc *mmc = find_mmc_device(dev);
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int ret;
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if (!mmc)
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return -ENODEV;
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ret = mmc_init(mmc);
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if (ret)
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return ret;
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*descp = &mmc->block_dev;
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return 0;
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}
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U_BOOT_LEGACY_BLK(mmc) = {
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.if_typename = "mmc",
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.if_type = IF_TYPE_MMC,
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.max_devs = -1,
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.get_dev = mmc_get_dev,
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.select_hwpart = mmc_select_hwpartp,
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};
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