[sdio]开启emmc内部cache加快传输 (#7896)

components/drivers/include/drivers/mmcsd_card.h

@@ -127,7 +127,10 @@ struct rt_sdio_function {
 
 #define SDIO_MAX_FUNCTIONS      7
 
-
+struct rt_mmc_ext_csd
+{
+    rt_uint32_t cache_size;
+};
 
 struct rt_mmcsd_card {
     struct rt_mmcsd_host *host;
@@ -164,6 +167,8 @@ struct rt_mmcsd_card {
     struct rt_sdio_cis     cis;  /* common tuple info */
     struct rt_sdio_function *sdio_function[SDIO_MAX_FUNCTIONS + 1]; /* SDIO functions (devices) */
     rt_list_t blk_devices;  /* for block device list */
+
+    struct rt_mmc_ext_csd ext_csd;
 };
 
 #ifdef __cplusplus

components/drivers/sdio/mmc.c

@@ -209,6 +209,12 @@ static int mmc_parse_ext_csd(struct rt_mmcsd_card *card, rt_uint8_t *ext_csd)
         card->hs_max_data_rate = 52000000;
     }
 
+    card->ext_csd.cache_size =
+        ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
+        ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
+        ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
+        ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
+
     card_capacity = *((rt_uint32_t *)&ext_csd[EXT_CSD_SEC_CNT]);
     card->card_sec_cnt = card_capacity;
     card_capacity *= card->card_blksize;
@@ -613,6 +619,12 @@ static rt_int32_t mmcsd_mmc_init_card(struct rt_mmcsd_host *host,
         goto err0;
     }
 
+    if (card->ext_csd.cache_size > 0)
+    {
+        mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+                   EXT_CSD_CACHE_CTRL, 1);
+    }
+
     host->card = card;
 
     rt_free(ext_csd);