From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH 1/3] mci: Add more respone types
Date: Tue, 10 Jan 2023 16:50:37 +0100 [thread overview]
Message-ID: <20230110155039.2039341-1-s.hauer@pengutronix.de> (raw)
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
include/mci.h | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/include/mci.h b/include/mci.h
index d949310fac..d3201e17e6 100644
--- a/include/mci.h
+++ b/include/mci.h
@@ -326,6 +326,17 @@
#define MMC_RSP_BUSY (1 << 3) /* card may send busy */
#define MMC_RSP_OPCODE (1 << 4) /* response contains opcode */
+#define MMC_CMD_MASK (3 << 5) /* non-SPI command type */
+#define MMC_CMD_AC (0 << 5)
+#define MMC_CMD_ADTC (1 << 5)
+#define MMC_CMD_BC (2 << 5)
+#define MMC_CMD_BCR (3 << 5)
+
+#define MMC_RSP_SPI_S1 (1 << 7) /* one status byte */
+#define MMC_RSP_SPI_S2 (1 << 8) /* second byte */
+#define MMC_RSP_SPI_B4 (1 << 9) /* four data bytes */
+#define MMC_RSP_SPI_BUSY (1 << 10) /* card may send busy */
+
#define MMC_RSP_NONE (0)
#define MMC_RSP_R1 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
#define MMC_RSP_R1b (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY)
@@ -336,6 +347,19 @@
#define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
#define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
+/*
+ * These are the SPI response types for MMC, SD, and SDIO cards.
+ * Commands return R1, with maybe more info. Zero is an error type;
+ * callers must always provide the appropriate MMC_RSP_SPI_Rx flags.
+ */
+#define MMC_RSP_SPI_R1 (MMC_RSP_SPI_S1)
+#define MMC_RSP_SPI_R1B (MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY)
+#define MMC_RSP_SPI_R2 (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2)
+#define MMC_RSP_SPI_R3 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
+#define MMC_RSP_SPI_R4 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
+#define MMC_RSP_SPI_R5 (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2)
+#define MMC_RSP_SPI_R7 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
+
/** command information to be sent to the SD/MMC card */
struct mci_cmd {
unsigned cmdidx; /**< Command to be sent to the SD/MMC card */
--
2.30.2
next reply other threads:[~2023-01-10 15:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-10 15:50 Sascha Hauer [this message]
2023-01-10 15:50 ` [PATCH 2/3] mci: handle SDIO cards gracefully Sascha Hauer
2023-01-10 15:50 ` [PATCH 3/3] ARM: dts: rpi3: Enable sdhci controller Sascha Hauer
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