ENGR00126228 eMMC: Configure boot_partition_enable

Enable the configurations of the boot enable on the eMMC cards.

Add the interface that used to configure the boot_bus_width

In order to make sure that the re-read the ext-csd of card
can be completed successfully, add the method to wait for
the finish of the busy state.

NOTE:
The following are the valid inputs when configure the boot
bus width of the eMMC cards.
+--------------------------------------------------------------------+
| Bit7 Bit6 Bit5 | Bit4 Bit3 | Bit2                 | Bit1 Bit0      |
|----------------|----------------------------------|----------------|
| X              | BOOT_MODE | RESET_BOOT_BUS_WIDTH | BOOT_BUS_WIDTH |
+--------------------------------------------------------------------+
Bit [4:3] : BOOT_MODE (non-volatile)
0x0 : Use single data rate + backward compatible timings in boot
operation (default)
0x1 : Use single data rate + high speed timings in boot operation mode
0x2 : Use dual data rate in boot operation
0x3 : Reserved
Bit [2]: RESET_BOOT_BUS_WIDTH (non-volatile)
0x0 : Reset bus width to x1, single data rate and backward compatible
timings after boot operation (default)
0x1 : Retain boot bus width and boot mode after boot operation
Bit[1:0] : BOOT_BUS_WIDTH (non-volatile)
0x0 : x1 (sdr) or x4 (ddr) bus width in boot operation mode (default)
0x1 : x4 (sdr/ddr) bus width in boot operation mode
0x2 : x8 (sdr/ddr) bus width in boot operation mode
0x3 : Reserved

The following are the valid inputs when configure the boot
partitions of the eMMC cards.
+------------------------------------------------------------+
| Bit7 | Bit6     | Bit5 Bit4 Bit3        | Bit2 Bit1 Bit0   |
|------|----------|-----------------------|------------------|
| X    | BOOT_ACK | BOOT_PARTITION_ENABLE | PARTITION_ACCESS |
+------------------------------------------------------------+
Bit7: Reserved
Bit6: always set to vaule '1' when boot_part is enabled
Bit[5:3]:
0x0 : Device not boot enabled (default)
0x1 : Boot partition 1 enabled for boot
0x2 : Boot partition 2 enabled for boot
0x7 : User area enabled for boot
Bit[2:0]:
0x0 : No access to boot partition (default)
0x1 : R/W boot partition 1
0x2 : R/W boot partition 2
So only the '0, 1, 2; 8, 9, 10; 16, 17, 18; 56, 57, 58' are
valid parameters when configure the boot_partiton.

Signed-off-by: Richard Zhu <r65037@freescale.com>

2 files changed, 24 insertions, 1 deletions

diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 1d9eceb396d8..8613fa6a6860 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -49,6 +49,7 @@ struct mmc_ext_csd {
 	unsigned char		boot_info;
 	unsigned char		boot_size_mult;
 	unsigned char		boot_config;
+	unsigned char		boot_bus_width;
 };
 
 struct sd_scr {
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 0ffc8fe3da3e..f8fcc0b7f401 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -251,6 +251,7 @@ struct _mmc_csd {
  * EXT_CSD fields
  */
 
+#define EXT_CSD_BOOT_BUS_WIDTH 	177	/* R/W */
 #define EXT_CSD_BOOT_CONFIG 	179	/* R/W */
 #define EXT_CSD_BUS_WIDTH	183	/* R/W */
 #define EXT_CSD_HS_TIMING	185	/* R/W */
@@ -280,7 +281,28 @@ struct _mmc_csd {
 #define EXT_CSD_BUS_WIDTH_4_DDR	5	/* Card is in 4 bit ddr mode */
 #define EXT_CSD_BUS_WIDTH_8_DDR	6	/* Card is in 8 bit ddr mode */
 
-#define EXT_CSD_BOOT_PARTITION_ACCESS_MASK      (0x3)
+#define EXT_CSD_BOOT_BUS_WIDTH_MASK 		(0x1F)
+#define EXT_CSD_BOOT_BUS_WIDTH_MODE_MASK 	(0x3 << 3)
+#define EXT_CSD_BOOT_BUS_WIDTH_MODE_SDR_NORMAL 	(0x0)
+#define EXT_CSD_BOOT_BUS_WIDTH_MODE_SDR_HIGH 	(0x1)
+#define EXT_CSD_BOOT_BUS_WIDTH_MODE_DDR		(0x2)
+#define EXT_CSD_BOOT_BUS_WIDTH_RST_WIDTH 	(1 << 2)
+#define EXT_CSD_BOOT_BUS_WIDTH_WIDTH_MASK 	(0x3)
+#define EXT_CSD_BOOT_BUS_WIDTH_1_SDR_4_DDR 	(0x0)
+#define EXT_CSD_BOOT_BUS_WIDTH_4_SDR_4_DDR 	(0x1)
+#define EXT_CSD_BOOT_BUS_WIDTH_8_SDR_8_DDR 	(0x2)
+
+#define EXT_CSD_BOOT_ACK_ENABLE 		(0x1 << 6)
+#define EXT_CSD_BOOT_PARTITION_ENABLE_MASK      (0x7 << 3)
+#define EXT_CSD_BOOT_PARTITION_DISABLE          (0x0)
+#define EXT_CSD_BOOT_PARTITION_PART1            (0x1 << 3)
+#define EXT_CSD_BOOT_PARTITION_PART2            (0x2 << 3)
+#define EXT_CSD_BOOT_PARTITION_USER             (0x7 << 3)
+
+#define EXT_CSD_BOOT_PARTITION_ACCESS_MASK      (0x7)
+#define EXT_CSD_BOOT_PARTITION_ACCESS_DISABLE   (0x0)
+#define EXT_CSD_BOOT_PARTITION_ACCESS_PART1     (0x1)
+#define EXT_CSD_BOOT_PARTITION_ACCESS_PART2     (0x2)
 
 /*
  * MMC_SWITCH access modes