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From 851d35fab7f93400a1d714524b5e986206d9b0c4 Mon Sep 17 00:00:00 2001
From: Koen Kooi <koen@dominion.thruhere.net>
Date: Thu, 25 Mar 2010 16:07:23 +0100
Subject: [PATCH 22/37] OMAP3: beagle: implement expansionboard detection based on board/overo.c code
---
board/ti/beagle/beagle.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++
board/ti/beagle/beagle.h | 25 +++++++++++++-
2 files changed, 101 insertions(+), 2 deletions(-)
diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c
index d357588..8c5b88c 100644
--- a/board/ti/beagle/beagle.c
+++ b/board/ti/beagle/beagle.c
@@ -38,6 +38,31 @@
#include <asm/mach-types.h>
#include "beagle.h"
+static struct {
+ unsigned int device_vendor;
+ unsigned char revision;
+ unsigned char content;
+ unsigned char fab_revision[8];
+ unsigned char env_var[16];
+ unsigned char env_setting[64];
+} expansion_config;
+
+#define TWL4030_I2C_BUS 0
+
+#define EXPANSION_EEPROM_I2C_BUS 1
+#define EXPANSION_EEPROM_I2C_ADDRESS 0x50
+
+#define TINCANTOOLS_VENDORID 0x0100
+#define GUMSTIX_VENDORID 0x0200
+#define SPECIALCOMP_VENDORID 0x0300
+
+#define TINCANTOOLS_ZIPPY 0x01000100
+#define TINCANTOOLS_ZIPPY2 0x02000100
+#define TINCANTOOLS_TRAINER 0x03000100
+#define TINCANTOOLS_SHOWDOG 0x04000100
+
+#define BEAGLE_NO_EEPROM 0xffffffff
+
static int beagle_revision;
/*
@@ -95,6 +120,27 @@ void beagle_identify(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 BEAGLE_NO_EEPROM if eeprom doesn't respond */
+ if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1)
+ return BEAGLE_NO_EEPROM;
+
+ /* read configuration data */
+ i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config,
+ sizeof(expansion_config));
+
+ return expansion_config.device_vendor;
+}
+
+/*
* Routine: misc_init_r
* Description: Configure board specific parts
*/
@@ -104,6 +150,38 @@ int misc_init_r(void)
struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
beagle_identify();
+ switch (get_expansion_id()) {
+ case TINCANTOOLS_ZIPPY:
+ printf("Recognized Tincantools Zippy expansion board (rev %d %s)\n",
+ expansion_config.revision, expansion_config.fab_revision);
+ MUX_TINCANTOOLS_ZIPPY();
+ break;
+ case TINCANTOOLS_ZIPPY2:
+ printf("Recognized Tincantools Zippy2 expansion board (rev %d %s)\n",
+ expansion_config.revision, expansion_config.fab_revision);
+ MUX_TINCANTOOLS_ZIPPY();
+ break;
+ case TINCANTOOLS_TRAINER:
+ printf("Recognized Tincantools Trainer expansion board (rev %d %s)\n",
+ expansion_config.revision, expansion_config.fab_revision);
+ break;
+ case TINCANTOOLS_SHOWDOG:
+ printf("Recognized Tincantools Showdow expansion board (rev %d %s)\n",
+ expansion_config.revision, expansion_config.fab_revision);
+ /* Place holder for DSS2 definition for showdog lcd */
+ setenv("defaultdisplay", "showdoglcd");
+ break;
+ case BEAGLE_NO_EEPROM:
+ printf("No EEPROM on expansion board\n");
+ break;
+ default:
+ printf("Unrecognized expansion board: %x\n", expansion_config.device_vendor);
+ }
+
+ if (expansion_config.content == 1)
+ setenv(expansion_config.env_var, expansion_config.env_setting);
+
+ i2c_set_bus_num(TWL4030_I2C_BUS);
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 fd06d46..ec4f831 100644
--- a/board/ti/beagle/beagle.h
+++ b/board/ti/beagle/beagle.h
@@ -260,8 +260,8 @@ 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*/\
@@ -412,4 +412,25 @@ 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*/\
+
#endif
--
1.6.6.1
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