dm: mmc: sandbox: Update SD card emulation

The SDcard initialization procedure does a few more things than it did earlier:
* switch the bus width even for 1-bit bus width
* check that speed has been properly set (in resp[4] of SD_CMD_SWITCH_FUNC)

Update the SD simulator to handle those requests gracefully.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>

diff --git a/drivers/mmc/sandbox_mmc.c b/drivers/mmc/sandbox_mmc.c
index fdb29a5505c61922cd0cbe2dec73cdd02c6af10f..8a5d256c11516e9fe474cf5f9ab6a7606857d538 100644 (file)
--- a/drivers/mmc/sandbox_mmc.c
+++ b/drivers/mmc/sandbox_mmc.c
@@ -48,9 +48,12 @@ static int sandbox_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
                cmd->response[1] = 10 << 16;    /* 1 << block_len */
                break;
        case SD_CMD_SWITCH_FUNC: {
+               if (!data)
+                       break;
                u32 *resp = (u32 *)data->dest;
-
                resp[7] = cpu_to_be32(SD_HIGHSPEED_BUSY);
+               if ((cmd->cmdarg & 0xF) == UHS_SDR12_BUS_SPEED)
+                       resp[4] = (cmd->cmdarg & 0xF) << 24;
                break;
        }
        case MMC_CMD_READ_SINGLE_BLOCK: