Re: [PATCH][MMC][1/6] Secure Digital (SD) support : protocol

[Pierre Ossman <drzeus-list@drzeus.cx>]

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Protocol definitions.

The basic commands needed for the later patches. The R1_APP_CMD seems to 
be misdefined in protocol.h so this patch changes it.


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Index: linux-sd/include/linux/mmc/mmc.h
===================================================================
--- linux-sd/include/linux/mmc/mmc.h	(revision 135)
+++ linux-sd/include/linux/mmc/mmc.h	(working copy)
@@ -37,6 +37,7 @@
 #define MMC_RSP_R1B	(MMC_RSP_SHORT|MMC_RSP_CRC|MMC_RSP_BUSY)
 #define MMC_RSP_R2	(MMC_RSP_LONG|MMC_RSP_CRC)
 #define MMC_RSP_R3	(MMC_RSP_SHORT)
+#define MMC_RSP_R6	(MMC_RSP_SHORT|MMC_RSP_CRC)
 
 	unsigned int		retries;	/* max number of retries */
 	unsigned int		error;		/* command error */
Index: linux-sd/include/linux/mmc/protocol.h
===================================================================
--- linux-sd/include/linux/mmc/protocol.h	(revision 135)
+++ linux-sd/include/linux/mmc/protocol.h	(working copy)
@@ -76,6 +76,16 @@
 #define MMC_APP_CMD              55   /* ac   [31:16] RCA        R1  */
 #define MMC_GEN_CMD              56   /* adtc [0] RD/WR          R1b */
 
+/* SD commands                           type  argument     response */
+  /* class 8 */
+/* This is basically the same command as for MMC with some quirks. */
+#define SD_SEND_RELATIVE_ADDR     3   /* ac                      R6  */
+
+  /* Application commands */
+#define SD_APP_SET_BUS_WIDTH      6   /* ac   [1:0] bus width    R1  */
+#define SD_APP_OP_COND           41   /* bcr  [31:0] OCR         R3  */
+#define SD_APP_SEND_SCR          51   /* adtc                    R1  */
+
 /*
   MMC status in R1
   Type
@@ -113,7 +123,7 @@
 #define R1_STATUS(x)            (x & 0xFFFFE000)
 #define R1_CURRENT_STATE(x)    	((x & 0x00001E00) >> 9)	/* sx, b (4 bits) */
 #define R1_READY_FOR_DATA	(1 << 8)	/* sx, a */
-#define R1_APP_CMD		(1 << 7)	/* sr, c */
+#define R1_APP_CMD		(1 << 5)	/* sr, c */
 
 /* These are unpacked versions of the actual responses */