diff options
| author | Dipen Dudhat <dipen.dudhat@freescale.com> | 2009-10-23 17:40:05 +0530 |
|---|---|---|
| committer | Scott Sweeny <scott.sweeny@timesys.com> | 2010-11-10 14:52:23 -0500 |
| commit | ac580e091467a589b13ada4c2e8427099ecc9aa8 (patch) | |
| tree | d8d7396d6120fdff5ac1e432665944038697e79b | |
| parent | 2fbb49637a3fad9cfed5dfb74a10e6ff3a7e1202 (diff) | |
Configure eSDHC using I2C device
On P1 and P2 RDB Platforms, read the I2C EEPROM to
get various board switch settings like NOR Flash
Bank selection, SD Data width etc.
Depending on,
switch SW5[6] - select width for eSDHC
ON - 4-bit [Enable eSPI]
OFF - 8-bit [Disable eSPI]
switch SW4[8] - NOR Flash Bank selection for Booting
OFF - Primary Bank
ON - Secondary Bank
Signed-off-by: Dipen Dudhat <dipen.dudhat@freescale.com>
| -rw-r--r-- | board/freescale/p1_p2_rdb/p1_p2_rdb.c | 25 | ||||
| -rw-r--r-- | include/configs/P1_P2_RDB.h | 1 |
2 files changed, 26 insertions, 0 deletions
diff --git a/board/freescale/p1_p2_rdb/p1_p2_rdb.c b/board/freescale/p1_p2_rdb/p1_p2_rdb.c index 4c03468a24..d34a6e71b2 100644 --- a/board/freescale/p1_p2_rdb/p1_p2_rdb.c +++ b/board/freescale/p1_p2_rdb/p1_p2_rdb.c @@ -130,8 +130,33 @@ int checkboard (void) int board_early_init_r(void) { + u8 i2c_data; + volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); const unsigned int flashbase = CONFIG_SYS_FLASH_BASE; const u8 flash_esel = 2; + unsigned int orig_bus = i2c_get_bus_num(); + + i2c_set_bus_num(1); + if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR2, 0, + 1, &i2c_data, sizeof(i2c_data)) == 0) { + if (i2c_data & 0x2) + puts("NOR Flash Bank : Secondary\n"); + else + puts("NOR Flash Bank : Primary\n"); + + if (i2c_data & 0x1) { + setbits_be32(&gur->pmuxcr, MPC85xx_PMUXCR_SD_DATA); + puts("SD/MMC : 8-bit Mode\n"); + puts("eSPI : Disabled\n"); + } else { + puts("SD/MMC : 4-bit Mode\n"); + puts("eSPI : Enabled\n"); + } + } + else + puts("Failed reading I2C Chip 0x18 on bus 1\n"); + + i2c_set_bus_num(orig_bus); /* * Remap Boot flash region to caching-inhibited diff --git a/include/configs/P1_P2_RDB.h b/include/configs/P1_P2_RDB.h index e2930c19b3..078bf1511f 100644 --- a/include/configs/P1_P2_RDB.h +++ b/include/configs/P1_P2_RDB.h @@ -338,6 +338,7 @@ extern unsigned long get_board_sys_clk(unsigned long dummy); #define CONFIG_SYS_I2C_EEPROM_NXID #endif #define CONFIG_SYS_I2C_EEPROM_ADDR 0x57 +#define CONFIG_SYS_I2C_EEPROM_ADDR2 0x18 #define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1 #define CONFIG_SYS_EEPROM_BUS_NUM 1 |