ARMV7: OMAP3: Add expansion board detection for Beagle

Beagle expansion boards contain an i2c eeprom to identify themselves.
This patch adds code to read and parse the eeprom contents.  It prints
the expansion board name and revision and modifies environment variables
as appropriate. This patch is based on the Overo expansion board code.

Signed-off-by: Koen Kooi <k-kooi@ti.com>
Signed-off-by: Steve Sakoman <steve.sakoman@linaro.org>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c
index c5d6679f482493a48417cc53f54416a3168b30b7..d9b6f01163b609cfdbc4f6340574b04718a6566c 100644 (file)
--- a/board/ti/beagle/beagle.c
+++ b/board/ti/beagle/beagle.c
@@ -39,6 +39,27 @@
 #include <asm/mach-types.h>
 #include "beagle.h"
 
+#define TWL4030_I2C_BUS                        0
+#define EXPANSION_EEPROM_I2C_BUS       1
+#define EXPANSION_EEPROM_I2C_ADDRESS   0x50
+
+#define TINCANTOOLS_ZIPPY              0x01000100
+#define TINCANTOOLS_ZIPPY2             0x02000100
+#define TINCANTOOLS_TRAINER            0x04000100
+#define TINCANTOOLS_SHOWDOG            0x03000100
+#define KBADC_BEAGLEFPGA               0x01000600
+
+#define BEAGLE_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;
+
 /*
  * Routine: board_init
  * Description: Early hardware init.
@@ -94,6 +115,31 @@ int get_board_revision(void)
        return revision;
 }
 
+/*
+ * Routine: get_expansion_id
+ * Description: This function checks for expansion board by checking I2C
+ *             bus 1 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 BEAGLE_NO_EEPROM if eeprom doesn't respond */
+       if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) {
+               i2c_set_bus_num(TWL4030_I2C_BUS);
+               return BEAGLE_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
@@ -141,6 +187,55 @@ int misc_init_r(void)
                printf("Beagle unknown 0x%02x\n", get_board_revision());
        }
 
+       switch (get_expansion_id()) {
+       case TINCANTOOLS_ZIPPY:
+               printf("Recognized Tincantools Zippy board (rev %d %s)\n",
+                       expansion_config.revision,
+                       expansion_config.fab_revision);
+               MUX_TINCANTOOLS_ZIPPY();
+               setenv("buddy", "zippy");
+               break;
+       case TINCANTOOLS_ZIPPY2:
+               printf("Recognized Tincantools Zippy2 board (rev %d %s)\n",
+                       expansion_config.revision,
+                       expansion_config.fab_revision);
+               MUX_TINCANTOOLS_ZIPPY();
+               setenv("buddy", "zippy2");
+               break;
+       case TINCANTOOLS_TRAINER:
+               printf("Recognized Tincantools Trainer board (rev %d %s)\n",
+                       expansion_config.revision,
+                       expansion_config.fab_revision);
+               MUX_TINCANTOOLS_ZIPPY();
+               MUX_TINCANTOOLS_TRAINER();
+               setenv("buddy", "trainer");
+               break;
+       case TINCANTOOLS_SHOWDOG:
+               printf("Recognized Tincantools Showdow board (rev %d %s)\n",
+                       expansion_config.revision,
+                       expansion_config.fab_revision);
+               /* Place holder for DSS2 definition for showdog lcd */
+               setenv("defaultdisplay", "showdoglcd");
+               setenv("buddy", "showdog");
+               break;
+       case KBADC_BEAGLEFPGA:
+               printf("Recognized KBADC Beagle FPGA board\n");
+               MUX_KBADC_BEAGLEFPGA();
+               setenv("buddy", "beaglefpga");
+               break;
+       case BEAGLE_NO_EEPROM:
+               printf("No EEPROM on expansion board\n");
+               setenv("buddy", "none");
+               break;
+       default:
+               printf("Unrecognized expansion board: %x\n",
+                       expansion_config.device_vendor);
+               setenv("buddy", "unknown");
+       }
+
+       if (expansion_config.content == 1)
+               setenv(expansion_config.env_var, expansion_config.env_setting);
+
        twl4030_power_init();
        twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
 

diff --git a/board/ti/beagle/beagle.h b/board/ti/beagle/beagle.h
index ec0da6d745477437c1c776db7929690e1e568437..b22b65337da5ecaecca101e31c5efb42233f2261 100644 (file)
--- a/board/ti/beagle/beagle.h
+++ b/board/ti/beagle/beagle.h
@@ -259,8 +259,8 @@ const omap3_sysinfo sysinfo = {
        MUX_VAL(CP(HSUSB0_DATA7),       (IEN  | PTD | DIS | M0)) /*HSUSB0_DATA7*/\
        MUX_VAL(CP(I2C1_SCL),           (IEN  | PTU | EN  | M0)) /*I2C1_SCL*/\
        MUX_VAL(CP(I2C1_SDA),           (IEN  | PTU | EN  | M0)) /*I2C1_SDA*/\
-       MUX_VAL(CP(I2C2_SCL),           (IEN  | PTU | EN  | M4)) /*GPIO_168*/\
-       MUX_VAL(CP(I2C2_SDA),           (IEN  | PTU | EN  | M4)) /*GPIO_183*/\
+       MUX_VAL(CP(I2C2_SCL),           (IEN  | PTU | EN  | M0)) /*I2C2_SCL*/\
+       MUX_VAL(CP(I2C2_SDA),           (IEN  | PTU | EN  | M0)) /*I2C2_SDA*/\
        MUX_VAL(CP(I2C3_SCL),           (IEN  | PTU | EN  | M0)) /*I2C3_SCL*/\
        MUX_VAL(CP(I2C3_SDA),           (IEN  | PTU | EN  | M0)) /*I2C3_SDA*/\
        MUX_VAL(CP(I2C4_SCL),           (IEN  | PTU | EN  | M0)) /*I2C4_SCL*/\
@@ -415,4 +415,46 @@ const omap3_sysinfo sysinfo = {
        MUX_VAL(CP(SYS_BOOT5),          (IDIS | PTD | DIS | M3)) /*DSS_DATA22*/\
        MUX_VAL(CP(SYS_BOOT6),          (IDIS | PTD | DIS | M3)) /*DSS_DATA23*/
 
+#define MUX_TINCANTOOLS_ZIPPY() \
+       MUX_VAL(CP(MMC2_CLK),       (IEN  | PTU | EN  | M0)) /*MMC2_CLK*/\
+       MUX_VAL(CP(MMC2_CMD),       (IEN  | PTU | EN  | M0)) /*MMC2_CMD*/\
+       MUX_VAL(CP(MMC2_DAT0),      (IEN  | PTU | EN  | M0)) /*MMC2_DAT0*/\
+       MUX_VAL(CP(MMC2_DAT1),      (IEN  | PTU | EN  | M0)) /*MMC2_DAT1*/\
+       MUX_VAL(CP(MMC2_DAT2),      (IEN  | PTU | EN  | M0)) /*MMC2_DAT2*/\
+       MUX_VAL(CP(MMC2_DAT3),      (IEN  | PTU | EN  | M0)) /*MMC2_DAT3*/\
+       MUX_VAL(CP(MMC2_DAT4),      (IEN  | PTU | EN  | M1)) /*MMC2_DIR_DAT0*/\
+       MUX_VAL(CP(MMC2_DAT5),      (IEN  | PTU | EN  | M1)) /*MMC2_DIR_DAT1*/\
+       MUX_VAL(CP(MMC2_DAT6),      (IEN  | PTU | EN  | M1)) /*MMC2_DIR_CMD*/\
+       MUX_VAL(CP(MMC2_DAT7),      (IEN  | PTU | EN  | M1)) /*MMC2_CLKIN*/\
+       MUX_VAL(CP(MCBSP1_CLKR),    (IEN  | PTU | EN  | M1)) /*MCSPI4_CLK*/\
+       MUX_VAL(CP(MCBSP1_FSR),     (IEN  | PTU | EN  | M4)) /*GPIO_157*/\
+       MUX_VAL(CP(MCBSP1_DX),      (IEN  | PTD | EN  | M1)) /*MCSPI4_SIMO*/\
+       MUX_VAL(CP(MCBSP1_DR),      (IEN  | PTD | DIS | M1)) /*MCSPI4_SOMI*/\
+       MUX_VAL(CP(MCBSP1_FSX),     (IEN  | PTD | EN  | M1)) /*MCSPI4_CS0*/\
+       MUX_VAL(CP(MCBSP1_CLKX),    (IEN  | PTD | DIS | M4)) /*GPIO_162*/\
+       MUX_VAL(CP(MCBSP3_DX),      (IEN  | PTD | DIS | M4)) /*GPIO_140*/\
+       MUX_VAL(CP(MCBSP3_DR),      (IEN  | PTD | DIS | M4)) /*GPIO_142*/\
+       MUX_VAL(CP(MCBSP3_CLKX),    (IEN  | PTD | DIS | M4)) /*GPIO_141*/
+
+#define MUX_TINCANTOOLS_TRAINER() \
+       MUX_VAL(CP(MMC2_CLK),       (IEN  | PTU | EN  | M4)) /*GPIO_130*/\
+       MUX_VAL(CP(MMC2_CMD),       (IEN  | PTU | EN  | M4)) /*GPIO_131*/\
+       MUX_VAL(CP(MMC2_DAT0),      (IEN  | PTU | EN  | M4)) /*GPIO_132*/\
+       MUX_VAL(CP(MMC2_DAT1),      (IEN  | PTU | EN  | M4)) /*GPIO_133*/\
+       MUX_VAL(CP(MMC2_DAT2),      (IEN  | PTU | EN  | M4)) /*GPIO_134*/\
+       MUX_VAL(CP(MMC2_DAT3),      (IEN  | PTU | EN  | M4)) /*GPIO_135*/\
+       MUX_VAL(CP(MMC2_DAT4),      (IEN  | PTU | EN  | M4)) /*GPIO_136*/\
+       MUX_VAL(CP(MMC2_DAT5),      (IEN  | PTU | EN  | M4)) /*GPIO_137*/\
+       MUX_VAL(CP(MMC2_DAT6),      (IEN  | PTU | EN  | M4)) /*GPIO_138*/\
+       MUX_VAL(CP(MMC2_DAT7),      (IEN  | PTU | EN  | M4)) /*GPIO_139*/\
+       MUX_VAL(CP(MCBSP3_DX),      (IEN  | PTU | EN  | M4)) /*GPIO_140*/\
+       MUX_VAL(CP(MCBSP3_CLKX),    (IEN  | PTU | EN  | M4)) /*GPIO_141*/\
+       MUX_VAL(CP(MCBSP1_CLKX),    (IEN  | PTU | EN  | M4)) /*GPIO_162*/
+
+#define MUX_KBADC_BEAGLEFPGA() \
+       MUX_VAL(CP(MCBSP1_CLKR),    (IEN  | PTU | DIS | M1)) /*MCSPI4_CLK*/\
+       MUX_VAL(CP(MCBSP1_DX),      (IDIS | PTU | DIS | M1)) /*MCSPI4_SIMO*/\
+       MUX_VAL(CP(MCBSP1_DR),      (IEN  | PTU | EN  | M1)) /*MCSPI4_SOMI*/\
+       MUX_VAL(CP(MCBSP1_FSX),     (IDIS | PTU | DIS | M1)) /*MCSPI4_CS0*/
+
 #endif

diff --git a/include/configs/omap3_beagle.h b/include/configs/omap3_beagle.h
index 1c9a0075b829b049ee5319998e677bfb0d44b846..e7d5bd07f2b4cff5c0ae226043356c9d32277eaf 100644 (file)
--- a/include/configs/omap3_beagle.h
+++ b/include/configs/omap3_beagle.h
@@ -152,6 +152,7 @@
 #define CONFIG_SYS_I2C_SLAVE           1
 #define CONFIG_SYS_I2C_BUS             0
 #define CONFIG_SYS_I2C_BUS_SELECT      1
+#define CONFIG_I2C_MULTI_BUS           1
 #define CONFIG_DRIVER_OMAP34XX_I2C     1
 
 /*