[v42,94/98] hw/sd/sdcard: add emmc_cmd_SEND_TUNING_BLOCK handler (CMD21)

Commit Message

Philippe Mathieu-Daudé June 28, 2024, 7:02 a.m. UTC

From: Sai Pavan Boddu <[e-mail]>

MMC cards support different tuning sequence for entering HS200 mode.

Signed-off-by: Sai Pavan Boddu <[e-mail]>
Signed-off-by: Edgar E. Iglesias <[e-mail]>
Signed-off-by: Cédric Le Goater <[e-mail]>
Signed-off-by: Cédric Le Goater <[e-mail]>
Signed-off-by: Philippe Mathieu-Daudé <[e-mail]>
---
 hw/sd/sdmmc-internal.h |  3 +++
 hw/sd/sd.c             | 41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

Patch

diff --git a/hw/sd/sdmmc-internal.h b/hw/sd/sdmmc-internal.h
index 20d85aea6d..a2769a80aa 100644
--- a/hw/sd/sdmmc-internal.h
+++ b/hw/sd/sdmmc-internal.h
@@ -108,4 +108,7 @@ 
 #define EXT_CSD_PART_CONFIG_EN_BOOT0    (0x1 << 3)
 #define EXT_CSD_PART_CONFIG_EN_USER     (0x7 << 3)
 
+#define EXT_CSD_BUS_WIDTH_8_MASK        0x4
+#define EXT_CSD_BUS_WIDTH_4_MASK        0x2
+
 #endif
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 0561079eff..ae5e73175e 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -698,6 +698,25 @@  static const uint8_t sd_tuning_block_pattern4[64] = {
     0xbb, 0xff, 0xf7, 0xff,     0xf7, 0x7f, 0x7b, 0xde
 };
 
+static const uint8_t mmc_tuning_block_pattern8[128] = {
+    0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00,
+    0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc,
+    0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff,
+    0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff,
+    0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd,
+    0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb,
+    0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff,
+    0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff,
+    0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00,
+    0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc,
+    0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff,
+    0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee,
+    0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd,
+    0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff,
+    0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff,
+    0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee
+};
+
 static int sd_req_crc_validate(SDRequest *req)
 {
     uint8_t buffer[5];
@@ -1603,6 +1622,26 @@  static sd_rsp_type_t sd_cmd_SEND_TUNING_BLOCK(SDState *sd, SDRequest req)
                                  sizeof(sd_tuning_block_pattern4));
 }
 
+/* CMD21 */
+static sd_rsp_type_t emmc_cmd_SEND_TUNING_BLOCK(SDState *sd, SDRequest req)
+{
+    const uint8_t *buf;
+    size_t size;
+
+    if (sd->state != sd_transfer_state) {
+        sd_invalid_state_for_cmd(sd, req);
+    }
+
+    if (sd->ext_csd[EXT_CSD_BUS_WIDTH] & EXT_CSD_BUS_WIDTH_8_MASK) {
+        buf = mmc_tuning_block_pattern8;
+        size = sizeof(mmc_tuning_block_pattern8);
+    } else {
+        buf = sd_tuning_block_pattern4;
+        size = sizeof(sd_tuning_block_pattern4);
+    }
+    return sd_cmd_to_sendingdata(sd, req, 0, buf, size);
+}
+
 /* CMD23 */
 static sd_rsp_type_t sd_cmd_SET_BLOCK_COUNT(SDState *sd, SDRequest req)
 {
@@ -2391,6 +2430,7 @@  uint8_t sd_read_byte(SDState *sd)
     case 13: /* ACMD13: SD_STATUS */
     case 17: /* CMD17:  READ_SINGLE_BLOCK */
     case 19: /* CMD19:  SEND_TUNING_BLOCK (SD) */
+    case 21: /* CMD21:  SEND_TUNING_BLOCK (MMC) */
     case 22: /* ACMD22: SEND_NUM_WR_BLOCKS */
     case 30: /* CMD30:  SEND_WRITE_PROT */
     case 51: /* ACMD51: SEND_SCR */
@@ -2573,6 +2613,7 @@  static const SDProto sd_proto_emmc = {
         [16] = {2,  sd_ac,   "SET_BLOCKLEN", sd_cmd_SET_BLOCKLEN},
         [17] = {2,  sd_adtc, "READ_SINGLE_BLOCK", sd_cmd_READ_SINGLE_BLOCK},
         [19] = {0,  sd_adtc, "BUSTEST_W", sd_cmd_unimplemented},
+        [21] = {2,  sd_adtc, "SEND_TUNING_BLOCK", emmc_cmd_SEND_TUNING_BLOCK},
         [23] = {2,  sd_ac,   "SET_BLOCK_COUNT", sd_cmd_SET_BLOCK_COUNT},
         [24] = {4,  sd_adtc, "WRITE_SINGLE_BLOCK", sd_cmd_WRITE_SINGLE_BLOCK},
         [26] = {4,  sd_adtc, "PROGRAM_CID", mmc_cmd_PROGRAM_CID},