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| author | Priyanka Jain <Priyanka.Jain@freescale.com> | 2011-02-08 13:18:34 +0530 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-04-04 09:24:42 -0500 |
| commit | cac29f25fdda1fcbc962629825d309da87618faf (patch) | |
| tree | 63dea28176d497277d85ea501d2a905bda9d2afc /board/freescale/p1_p2_rdb | |
| parent | 0c871e952e77fe9f3b88d52778d2b5d82da4d884 (diff) | |
| download | u-boot-imx-cac29f25fdda1fcbc962629825d309da87618faf.zip u-boot-imx-cac29f25fdda1fcbc962629825d309da87618faf.tar.gz u-boot-imx-cac29f25fdda1fcbc962629825d309da87618faf.tar.bz2 | |
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 <Priyanka.Jain@freescale.com>
Signed-off-by: Dipen Dudhat <dipen.dudhat@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'board/freescale/p1_p2_rdb')
| -rw-r--r-- | board/freescale/p1_p2_rdb/p1_p2_rdb.c | 25 |
1 files changed, 25 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 806d90e..9f57a21 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 <vsc7385.h> #include <netdev.h> #include <rtc.h> +#include <i2c.h> 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 |