ENGR00173284 merge "eMMC: Configure boot_partition_enable"

ENGR00173284 merge "eMMC: Configure boot_partition_enable"

ENGR126228 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>
Signed-off-by: Ryan QIAN <b32804@freescale.com>