diff options
Diffstat (limited to 'board/overo/overo.c')
| -rw-r--r-- | board/overo/overo.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/board/overo/overo.c b/board/overo/overo.c index 9c92693..f917e40 100644 --- a/board/overo/overo.c +++ b/board/overo/overo.c @@ -40,6 +40,32 @@ #include <asm/mach-types.h> #include "overo.h" +#define TWL4030_I2C_BUS 0 +#define EXPANSION_EEPROM_I2C_BUS 2 +#define EXPANSION_EEPROM_I2C_ADDRESS 0x51 + +#define GUMSTIX_SUMMIT 0x01000200 +#define GUMSTIX_TOBI 0x02000200 +#define GUMSTIX_TOBI_DUO 0x03000200 +#define GUMSTIX_PALO35 0x04000200 +#define GUMSTIX_PALO43 0x05000200 +#define GUMSTIX_CHESTNUT43 0x06000200 +#define GUMSTIX_PINTO 0x07000200 +#define GUMSTIX_GALLOP43 0x08000200 + +#define ETTUS_USRP_E 0x01000300 + +#define GUMSTIX_NO_EEPROM 0xffffffff + +static struct { + unsigned int device_vendor; + unsigned char revision; + unsigned char content; + char fab_revision[8]; + char env_var[16]; + char env_setting[64]; +} expansion_config; + #if defined(CONFIG_CMD_NET) static void setup_net_chip(void); #endif @@ -137,6 +163,31 @@ int get_sdio2_config(void) } /* + * Routine: get_expansion_id + * Description: This function checks for expansion board by checking I2C + * bus 2 for the availability of an AT24C01B serial EEPROM. + * returns the device_vendor field from the EEPROM + */ +unsigned int get_expansion_id(void) +{ + i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS); + + /* return GUMSTIX_NO_EEPROM if eeprom doesn't respond */ + if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) { + i2c_set_bus_num(TWL4030_I2C_BUS); + return GUMSTIX_NO_EEPROM; + } + + /* read configuration data */ + i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config, + sizeof(expansion_config)); + + i2c_set_bus_num(TWL4030_I2C_BUS); + + return expansion_config.device_vendor; +} + +/* * Routine: misc_init_r * Description: Configure board specific parts */ @@ -164,6 +215,70 @@ int misc_init_r(void) printf("Unable to detect mmc2 connection type\n"); } + switch (get_expansion_id()) { + case GUMSTIX_SUMMIT: + printf("Recognized Summit expansion board (rev %d %s)\n", + expansion_config.revision, + expansion_config.fab_revision); + setenv("defaultdisplay", "dvi"); + break; + case GUMSTIX_TOBI: + printf("Recognized Tobi expansion board (rev %d %s)\n", + expansion_config.revision, + expansion_config.fab_revision); + setenv("defaultdisplay", "dvi"); + break; + case GUMSTIX_TOBI_DUO: + printf("Recognized Tobi Duo expansion board (rev %d %s)\n", + expansion_config.revision, + expansion_config.fab_revision); + break; + case GUMSTIX_PALO35: + printf("Recognized Palo35 expansion board (rev %d %s)\n", + expansion_config.revision, + expansion_config.fab_revision); + setenv("defaultdisplay", "lcd35"); + break; + case GUMSTIX_PALO43: + printf("Recognized Palo43 expansion board (rev %d %s)\n", + expansion_config.revision, + expansion_config.fab_revision); + setenv("defaultdisplay", "lcd43"); + break; + case GUMSTIX_CHESTNUT43: + printf("Recognized Chestnut43 expansion board (rev %d %s)\n", + expansion_config.revision, + expansion_config.fab_revision); + setenv("defaultdisplay", "lcd43"); + break; + case GUMSTIX_PINTO: + printf("Recognized Pinto expansion board (rev %d %s)\n", + expansion_config.revision, + expansion_config.fab_revision); + break; + case GUMSTIX_GALLOP43: + printf("Recognized Gallop43 expansion board (rev %d %s)\n", + expansion_config.revision, + expansion_config.fab_revision); + setenv("defaultdisplay", "lcd43"); + break; + case ETTUS_USRP_E: + printf("Recognized Ettus Research USRP-E (rev %d %s)\n", + expansion_config.revision, + expansion_config.fab_revision); + MUX_USRP_E(); + setenv("defaultdisplay", "dvi"); + break; + case GUMSTIX_NO_EEPROM: + printf("No EEPROM on expansion board\n"); + break; + default: + printf("Unrecognized expansion board\n"); + } + + if (expansion_config.content == 1) + setenv(expansion_config.env_var, expansion_config.env_setting); + dieid_num_r(); return 0; |