mmc: Tinification of the mmc code
Add new configuration option CONFIG_MMC_TINY which strips away all
memory allocation within the MMC code and code for handling multiple
cards. This allows extremely space-constrained SPL code use the MMC
framework.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@konsulko.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
diff --git a/drivers/mmc/mmc_legacy.c b/drivers/mmc/mmc_legacy.c
index 25361d1..bdf9d98 100644
--- a/drivers/mmc/mmc_legacy.c
+++ b/drivers/mmc/mmc_legacy.c
@@ -13,6 +13,7 @@
static struct list_head mmc_devices;
static int cur_dev_num = -1;
+#if !CONFIG_IS_ENABLED(MMC_TINY)
struct mmc *find_mmc_device(int dev_num)
{
struct mmc *m;
@@ -62,6 +63,7 @@
mmc_start_init(m);
}
}
+#endif
void mmc_list_init(void)
{
@@ -109,6 +111,35 @@
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 = {
+ .if_type = IF_TYPE_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;
+
+ 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;
@@ -157,6 +188,7 @@
/* only freeing memory for now */
free(mmc);
}
+#endif
static int mmc_select_hwpartp(struct blk_desc *desc, int hwpart)
{