diff options
Diffstat (limited to 'board/st/u8500/u8500.c')
| -rw-r--r-- | board/st/u8500/u8500.c | 54 |
1 files changed, 51 insertions, 3 deletions
diff --git a/board/st/u8500/u8500.c b/board/st/u8500/u8500.c index 5be3f5149..83e899434 100644 --- a/board/st/u8500/u8500.c +++ b/board/st/u8500/u8500.c @@ -22,6 +22,8 @@ */ #include <config.h> +#include <common.h> +#include <i2c.h> #include <asm/types.h> #include <asm/io.h> #include <asm/errno.h> @@ -67,6 +69,8 @@ #define PRCM_TCR (PRCMU_BASE + 0x1C8) +int board_id; /* set in board_late_init() */ + /* PLLs for clock management registers */ enum { GATED = 0, @@ -189,8 +193,6 @@ unsigned int addr_vall_arr[] = { 0x8011F008, 0x00001CFF, // Clocks for HSI TODO Enable reqd only 0x8000F000, 0x00007FFF, // Clocks for I2C TODO Enable reqd only 0x8000F008, 0x00007FFF, // Clocks for I2C TODO Enable reqd only -0x8000E120, 0x003C0000, // GPIO for I2C/SD -0x8000E124, 0x00000000, // GPIO for I2C/SD 0x80157020, 0x00000150, // I2C 48MHz clock 0x8012F000, 0x00007FFF, // Clocks for SD TODO Enable reqd only 0x8012F008, 0x00007FFF, // Clocks for SD TODO Enable reqd only @@ -214,11 +216,57 @@ unsigned int addr_vall_arr[] = { }; #ifdef BOARD_LATE_INIT +/* + * called after all initialisation were done, but before the generic + * mmc_initialize(). + */ int board_late_init(void) { + uchar byte; +#ifdef CONFIG_MMC + uchar byte_array[] = {0x06, 0x06}; +#endif + + /* + * Determine and set board_id environment variable + * 0: mop500, 1: href500 + * Above boards have different GPIO expander chips which we can + * distinguish by the chip id. + * + * The board_id environment variable is needed for the Linux bootargs. + */ + (void) i2c_set_bus_num(0); + (void) i2c_read(CONFIG_SYS_I2C_GPIOE_ADDR, 0x80, 1, &byte, 1); + if (byte == 0x01) { + board_id = 0; + setenv("board_id", "0"); + } else { + board_id = 1; + setenv("board_id", "1"); + } +#ifdef CONFIG_MMC + /* + * config extended GPIO pins for level shifter and + * SDMMC_ENABLE + */ + if (board_id == 0) { + /* MOP500 */ + byte = 0x0c; + (void) i2c_write(CONFIG_SYS_I2C_GPIOE_ADDR, 0x89, 1, &byte, 1); + (void) i2c_write(CONFIG_SYS_I2C_GPIOE_ADDR, 0x83, 1, &byte, 1); + } else { + /* HREF */ + /* set the direction of GPIO KPY9 and KPY10 */ + byte = 0x06; + (void) i2c_write(CONFIG_SYS_I2C_GPIOE_ADDR, 0xC8, 1, &byte, 1); + /* must be a multibyte access */ + (void) i2c_write(CONFIG_SYS_I2C_GPIOE_ADDR, 0xC4, 1, + &byte_array[0], 2); + } +#endif /* CONFIG_MMC */ return (0); } -#endif +#endif /* BOARD_LATE_INIT */ static void init_regs(void) { |