From cac29f25fdda1fcbc962629825d309da87618faf Mon Sep 17 00:00:00 2001 From: Priyanka Jain Date: Tue, 8 Feb 2011 13:18:34 +0530 Subject: powerpc/85xx: Read board switch settings on p1_p2_rdb PCA9557 is parallel I/O expansion device on I2C bus which stores various board switch settings like NOR Flash-Bank selection, SD Data width. On board: switch SW5[6] is to select width for eSDHC ON - 4-bit [Enable eSPI] OFF - 8-bit [Disable eSPI] switch SW4[8] is to select NOR Flash Bank for Booting OFF - Primary Bank ON - Secondary Bank Read board switch settings on p1_p2_rdb and configure corresponding eSDHC width. Signed-off-by: Priyanka Jain Signed-off-by: Dipen Dudhat Signed-off-by: Kumar Gala --- board/freescale/p1_p2_rdb/p1_p2_rdb.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'board/freescale') diff --git a/board/freescale/p1_p2_rdb/p1_p2_rdb.c b/board/freescale/p1_p2_rdb/p1_p2_rdb.c index 806d90e6e4..9f57a21925 100644 --- a/board/freescale/p1_p2_rdb/p1_p2_rdb.c +++ b/board/freescale/p1_p2_rdb/p1_p2_rdb.c @@ -35,6 +35,7 @@ #include #include #include +#include DECLARE_GLOBAL_DATA_PTR; @@ -142,6 +143,30 @@ int board_early_init_r(void) { const unsigned int flashbase = CONFIG_SYS_FLASH_BASE; const u8 flash_esel = find_tlb_idx((void *)flashbase, 1); + volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); + unsigned int orig_bus = i2c_get_bus_num(); + u8 i2c_data; + + i2c_set_bus_num(1); + if (i2c_read(CONFIG_SYS_I2C_PCA9557_ADDR, 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 -- cgit v1.2.3