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[RFC PATCH 14/17] hw/sd: Add CMD21 tuning sequence
From: |
Cédric Le Goater |
Subject: |
[RFC PATCH 14/17] hw/sd: Add CMD21 tuning sequence |
Date: |
Fri, 18 Mar 2022 14:28:21 +0100 |
From: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
MMC cards support different tuning sequence for entering HS200 mode.
Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
[ clg: - ported on aspeed-7.0 patchset ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
hw/sd/sd.c | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 289764a38bf3..3a3b9d62e1ba 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -2071,6 +2071,30 @@ static const uint8_t
sd_tuning_block_pattern[SD_TUNING_BLOCK_SIZE] = {
0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde,
};
+#define EXCSD_BUS_WIDTH_OFFSET 183
+#define BUS_WIDTH_8_MASK 0x4
+#define BUS_WIDTH_4_MASK 0x2
+#define MMC_TUNING_BLOCK_SIZE 128
+
+static const uint8_t mmc_tuning_block_pattern[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,
+};
+
uint8_t sd_read_byte(SDState *sd)
{
/* TODO: Append CRCs */
@@ -2165,6 +2189,21 @@ uint8_t sd_read_byte(SDState *sd)
ret = sd_tuning_block_pattern[sd->data_offset++];
break;
+ case 21: /* CMD21: SEND_TUNING_BLOCK (MMC) */
+ if (sd->data_offset >= MMC_TUNING_BLOCK_SIZE - 1) {
+ sd->state = sd_transfer_state;
+ }
+ if (sd->ext_csd[EXCSD_BUS_WIDTH_OFFSET] & BUS_WIDTH_8_MASK) {
+ ret = mmc_tuning_block_pattern[sd->data_offset++];
+ } else {
+ /* Return LSB Nibbles of two byte from the 8bit tuning block
+ * for 4bit mode
+ */
+ ret = mmc_tuning_block_pattern[sd->data_offset++] & 0x0F;
+ ret |= (mmc_tuning_block_pattern[sd->data_offset++] & 0x0F) << 4;
+ }
+ break;
+
case 22: /* ACMD22: SEND_NUM_WR_BLOCKS */
ret = sd->data[sd->data_offset ++];
--
2.34.1
- [RFC PATCH 00/17] hw/sd: Rework models for eMMC support, Cédric Le Goater, 2022/03/18
- [RFC PATCH 02/17] hw/sd: Move proto_name to SDProto structure, Cédric Le Goater, 2022/03/18
- [RFC PATCH 01/17] hw/sd: When card is in wrong state, log which state it is, Cédric Le Goater, 2022/03/18
- [RFC PATCH 12/17] hw/sd: Fix SET_BLOCK_COUNT command argument, Cédric Le Goater, 2022/03/18
- [RFC PATCH 17/17] hw/sd: Subtract bootarea size from blk, Cédric Le Goater, 2022/03/18
- [RFC PATCH 06/17] hw/sd: Add sd_cmd_GO_IDLE_STATE() handler, Cédric Le Goater, 2022/03/18
- [RFC PATCH 04/17] hw/sd: Add sd_cmd_illegal() handler, Cédric Le Goater, 2022/03/18
- [RFC PATCH 14/17] hw/sd: Add CMD21 tuning sequence,
Cédric Le Goater <=
- [RFC PATCH 05/17] hw/sd: Add sd_cmd_unimplemented() handler, Cédric Le Goater, 2022/03/18
- [RFC PATCH 13/17] hw/sd: Update CMD1 definition for MMC, Cédric Le Goater, 2022/03/18
- [RFC PATCH 11/17] hw/sd: Add eMMC support, Cédric Le Goater, 2022/03/18
- [RFC PATCH 07/17] hw/sd: Add sd_cmd_SEND_OP_CMD() handler, Cédric Le Goater, 2022/03/18
- [RFC PATCH 10/17] hw/sd: Add sd_cmd_SEND_TUNING_BLOCK() handler, Cédric Le Goater, 2022/03/18
- [RFC PATCH 03/17] hw/sd: Introduce sd_cmd_handler type, Cédric Le Goater, 2022/03/18
- [RFC PATCH 16/17] hw/sd: Support boot area in emmc image, Cédric Le Goater, 2022/03/18
- [RFC PATCH 15/17] hw/sd: Add mmc switch function support, Cédric Le Goater, 2022/03/18