[components][sdio] Support DDR mode

components/drivers/include/drivers/mmcsd_host.h

@@ -45,7 +45,8 @@ struct rt_mmcsd_io_cfg {
 #define MMCSD_BUS_WIDTH_1       0
 #define MMCSD_BUS_WIDTH_4       2
 #define MMCSD_BUS_WIDTH_8       3
-
+#define MMCSD_DDR_BUS_WIDTH_4   4
+#define MMCSD_DDR_BUS_WIDTH_8   5
 };
 
 struct rt_mmcsd_host;
@@ -90,6 +91,9 @@ struct rt_mmcsd_host {
 #define controller_is_spi(host) (host->flags & MMCSD_HOST_IS_SPI)
 #define MMCSD_SUP_SDIO_IRQ  (1 << 4)    /* support signal pending SDIO IRQs */
 #define MMCSD_SUP_HIGHSPEED (1 << 5)    /* support high speed */
+#define MMCSD_SUP_HIGHSPEED_DDR     (1 << 6)    /* support high speed(DDR) */
+#define MMCSD_SUP_HIGHSPEED_HS200   (1 << 7)    /* support high speed HS200 */
+#define MMCSD_SUP_HIGHSPEED_HS400   (1 << 8)    /* support high speed HS400 */
 
     rt_uint32_t max_seg_size;   /* maximum size of one dma segment */
     rt_uint32_t max_dma_segs;   /* maximum number of dma segments in one request */

components/drivers/sdio/mmc.c

@@ -290,10 +290,19 @@ out:
 static int mmc_select_bus_width(struct rt_mmcsd_card *card, rt_uint8_t *ext_csd)
 {
   rt_uint32_t ext_csd_bits[] = {
+    EXT_CSD_DDR_BUS_WIDTH_8,
+    EXT_CSD_DDR_BUS_WIDTH_4,
     EXT_CSD_BUS_WIDTH_8,
     EXT_CSD_BUS_WIDTH_4,
     EXT_CSD_BUS_WIDTH_1
   };
+  rt_uint32_t bus_widths[] = {
+    MMCSD_DDR_BUS_WIDTH_8,
+    MMCSD_DDR_BUS_WIDTH_4,
+    MMCSD_BUS_WIDTH_8,
+    MMCSD_BUS_WIDTH_4,
+    MMCSD_BUS_WIDTH_1
+  };
   struct rt_mmcsd_host *host = card->host;
   unsigned idx, trys, bus_width = 0;
   int err = 0;
@@ -317,19 +326,33 @@ static int mmc_select_bus_width(struct rt_mmcsd_card *card, rt_uint8_t *ext_csd)
     * bail out early if corresponding bus capable wasn't
     * set by drivers.
     */
-     if ((!(host->flags & MMCSD_BUSWIDTH_8) &&
+    if ((!((host->flags & MMCSD_BUSWIDTH_8) &&
+           (host->flags & MMCSD_SUP_HIGHSPEED_DDR)) &&
+         ext_csd_bits[idx] == EXT_CSD_DDR_BUS_WIDTH_8) ||
+        (!((host->flags & MMCSD_BUSWIDTH_4) &&
+           (host->flags & MMCSD_SUP_HIGHSPEED_DDR)) &&
+         ext_csd_bits[idx] == EXT_CSD_DDR_BUS_WIDTH_4) ||
+        (!(host->flags & MMCSD_BUSWIDTH_8) &&
          ext_csd_bits[idx] == EXT_CSD_BUS_WIDTH_8) ||
         (!(host->flags & MMCSD_BUSWIDTH_4) &&
-      (ext_csd_bits[idx] == EXT_CSD_BUS_WIDTH_4 ||
+         ext_csd_bits[idx] == EXT_CSD_BUS_WIDTH_4))
-      ext_csd_bits[idx] == EXT_CSD_BUS_WIDTH_8)))
         continue;
 
+    if (host->flags & MMCSD_SUP_HIGHSPEED_DDR)
+    {
+        /* HS_TIMING must be set to "0x1" before setting BUS_WIDTH for dual-data-rate(DDR) operation */
+        err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS);
+        if (err)
+            LOG_E("switch to speed mode width hight speed failed!");
+    }
+
     err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
                      EXT_CSD_BUS_WIDTH,
                      ext_csd_bits[idx]);
     if (err)
       continue;
 
+    bus_width = bus_widths[idx];
     for(trys = 0; trys < 5; trys++){
         mmcsd_set_bus_width(host, bus_width);
         mmcsd_delay_ms(10);
@@ -342,14 +365,20 @@ static int mmc_select_bus_width(struct rt_mmcsd_card *card, rt_uint8_t *ext_csd)
       break;
     } else {
       switch(ext_csd_bits[idx]){
-          case 0:
+          case EXT_CSD_DDR_BUS_WIDTH_8:
-            LOG_E("switch to bus width 1 bit failed!");
+            LOG_E("switch to bus width DDR 8 bit failed!");
             break;
-          case 1:
+          case EXT_CSD_DDR_BUS_WIDTH_4:
+            LOG_E("switch to bus width DDR 4 bit failed!");
+            break;
+          case EXT_CSD_BUS_WIDTH_8:
+            LOG_E("switch to bus width 8 bit failed!");
+            break;
+          case EXT_CSD_BUS_WIDTH_4:
             LOG_E("switch to bus width 4 bit failed!");
             break;
-          case 2:
+          case EXT_CSD_BUS_WIDTH_1:
-            LOG_E("switch to bus width 8 bit failed!");
+            LOG_E("switch to bus width 1 bit failed!");
             break;
           default:
             break;

components/drivers/sdio/sdio.c

@@ -743,7 +743,11 @@ static rt_int32_t sdio_set_highspeed(struct rt_mmcsd_card *card)
     rt_int32_t ret;
     rt_uint8_t speed;
 
-    if (!(card->host->flags & MMCSD_SUP_HIGHSPEED))
+    if (!(card->host->flags &
+        (MMCSD_SUP_HIGHSPEED |
+         MMCSD_SUP_HIGHSPEED_DDR |
+         MMCSD_SUP_HIGHSPEED_HS200 |
+         MMCSD_SUP_HIGHSPEED_HS400)))
         return 0;
 
     if (!card->cccr.high_speed)