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@@ -39,6 +39,27 @@
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#include <asm/mach-types.h>
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#include "beagle.h"
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+#define TWL4030_I2C_BUS 0
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+#define EXPANSION_EEPROM_I2C_BUS 1
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+#define EXPANSION_EEPROM_I2C_ADDRESS 0x50
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+
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+#define TINCANTOOLS_ZIPPY 0x01000100
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+#define TINCANTOOLS_ZIPPY2 0x02000100
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+#define TINCANTOOLS_TRAINER 0x04000100
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+#define TINCANTOOLS_SHOWDOG 0x03000100
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+#define KBADC_BEAGLEFPGA 0x01000600
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+
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+#define BEAGLE_NO_EEPROM 0xffffffff
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+
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+static struct {
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+ unsigned int device_vendor;
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+ unsigned char revision;
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+ unsigned char content;
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+ char fab_revision[8];
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+ char env_var[16];
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+ char env_setting[64];
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+} expansion_config;
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+
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/*
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* Routine: board_init
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* Description: Early hardware init.
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@@ -94,6 +115,31 @@ int get_board_revision(void)
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return revision;
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}
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+/*
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+ * Routine: get_expansion_id
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+ * Description: This function checks for expansion board by checking I2C
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+ * bus 1 for the availability of an AT24C01B serial EEPROM.
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+ * returns the device_vendor field from the EEPROM
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+ */
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+unsigned int get_expansion_id(void)
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+{
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+ i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS);
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+
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+ /* return BEAGLE_NO_EEPROM if eeprom doesn't respond */
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+ if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) {
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+ i2c_set_bus_num(TWL4030_I2C_BUS);
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+ return BEAGLE_NO_EEPROM;
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+ }
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+
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+ /* read configuration data */
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+ i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config,
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+ sizeof(expansion_config));
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+
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+ i2c_set_bus_num(TWL4030_I2C_BUS);
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+
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+ return expansion_config.device_vendor;
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+}
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+
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/*
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* Routine: misc_init_r
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* Description: Configure board specific parts
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@@ -141,6 +187,55 @@ int misc_init_r(void)
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printf("Beagle unknown 0x%02x\n", get_board_revision());
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}
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+ switch (get_expansion_id()) {
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+ case TINCANTOOLS_ZIPPY:
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+ printf("Recognized Tincantools Zippy board (rev %d %s)\n",
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+ expansion_config.revision,
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+ expansion_config.fab_revision);
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+ MUX_TINCANTOOLS_ZIPPY();
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+ setenv("buddy", "zippy");
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+ break;
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+ case TINCANTOOLS_ZIPPY2:
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+ printf("Recognized Tincantools Zippy2 board (rev %d %s)\n",
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+ expansion_config.revision,
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+ expansion_config.fab_revision);
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+ MUX_TINCANTOOLS_ZIPPY();
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+ setenv("buddy", "zippy2");
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+ break;
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+ case TINCANTOOLS_TRAINER:
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+ printf("Recognized Tincantools Trainer board (rev %d %s)\n",
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+ expansion_config.revision,
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+ expansion_config.fab_revision);
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+ MUX_TINCANTOOLS_ZIPPY();
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+ MUX_TINCANTOOLS_TRAINER();
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+ setenv("buddy", "trainer");
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+ break;
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+ case TINCANTOOLS_SHOWDOG:
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+ printf("Recognized Tincantools Showdow board (rev %d %s)\n",
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+ expansion_config.revision,
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+ expansion_config.fab_revision);
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+ /* Place holder for DSS2 definition for showdog lcd */
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+ setenv("defaultdisplay", "showdoglcd");
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+ setenv("buddy", "showdog");
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+ break;
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+ case KBADC_BEAGLEFPGA:
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+ printf("Recognized KBADC Beagle FPGA board\n");
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+ MUX_KBADC_BEAGLEFPGA();
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+ setenv("buddy", "beaglefpga");
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+ break;
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+ case BEAGLE_NO_EEPROM:
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+ printf("No EEPROM on expansion board\n");
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+ setenv("buddy", "none");
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+ break;
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+ default:
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+ printf("Unrecognized expansion board: %x\n",
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+ expansion_config.device_vendor);
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+ setenv("buddy", "unknown");
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+ }
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+
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+ if (expansion_config.content == 1)
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+ setenv(expansion_config.env_var, expansion_config.env_setting);
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+
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twl4030_power_init();
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twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
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Koen Kooi