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From 9db5da6e8a0d6fb973b71902525ad3298faa39d9 Mon Sep 17 00:00:00 2001
From: Steve Sakoman <steve@sakoman.com>
Date: Wed, 10 Feb 2010 14:51:48 -0800
Subject: [PATCH 03/37] OMAP3: update Beagle revision detection to recognize C4 boards
---
board/ti/beagle/beagle.c | 77 +++++++++++++++++++++++++++-------------------
board/ti/beagle/beagle.h | 7 +++-
2 files changed, 51 insertions(+), 33 deletions(-)
diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c
index 3b4c9e7..ba16dd7 100644
--- a/board/ti/beagle/beagle.c
+++ b/board/ti/beagle/beagle.c
@@ -38,7 +38,7 @@
#include <asm/mach-types.h>
#include "beagle.h"
-static int beagle_revision_c;
+static int beagle_revision;
/*
* Routine: board_init
@@ -60,41 +60,38 @@ int board_init(void)
/*
* Routine: beagle_get_revision
* Description: Return the revision of the BeagleBoard this code is running on.
- * If it is a revision Ax/Bx board, this function returns 0,
- * on a revision C board you will get a 1.
*/
int beagle_get_revision(void)
{
- return beagle_revision_c;
+ return beagle_revision;
}
/*
* Routine: beagle_identify
- * Description: Detect if we are running on a Beagle revision Ax/Bx or
- * Cx. This can be done by GPIO_171. If this is low, we are
- * running on a revision C board.
+ * Description: Detect if we are running on a Beagle revision Ax/Bx,
+ * C1/2/3, C4 or D. This can be done by reading
+ * the level of GPIO173, GPIO172 and GPIO171. This should
+ * result in
+ * GPIO173, GPIO172, GPIO171: 1 1 1 => Ax/Bx
+ * GPIO173, GPIO172, GPIO171: 1 1 0 => C1/2/3
+ * GPIO173, GPIO172, GPIO171: 1 0 1 => C4
+ * GPIO173, GPIO172, GPIO171: 0 0 0 => D
*/
void beagle_identify(void)
{
- beagle_revision_c = 0;
- if (!omap_request_gpio(171)) {
- unsigned int val;
-
- omap_set_gpio_direction(171, 1);
- val = omap_get_gpio_datain(171);
- omap_free_gpio(171);
-
- if (val)
- beagle_revision_c = 0;
- else
- beagle_revision_c = 1;
- }
-
- printf("Board revision ");
- if (beagle_revision_c)
- printf("C\n");
- else
- printf("Ax/Bx\n");
+ omap_request_gpio(171);
+ omap_request_gpio(172);
+ omap_request_gpio(173);
+ omap_set_gpio_direction(171, 1);
+ omap_set_gpio_direction(172, 1);
+ omap_set_gpio_direction(173, 1);
+
+ beagle_revision = omap_get_gpio_datain(173) << 2 |
+ omap_get_gpio_datain(172) << 1 |
+ omap_get_gpio_datain(171);
+ omap_free_gpio(171);
+ omap_free_gpio(172);
+ omap_free_gpio(173);
}
/*
@@ -106,9 +103,31 @@ int misc_init_r(void)
struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE;
struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
+ beagle_identify();
+
twl4030_power_init();
twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
+ printf("Board revision ");
+ switch (beagle_revision) {
+ case REVISION_AXBX:
+ printf("Ax/Bx\n");
+ break;
+ case REVISION_CX:
+ printf("C1/C2/C3\n");
+ MUX_BEAGLE_C();
+ break;
+ case REVISION_C4:
+ printf("C4\n");
+ MUX_BEAGLE_C();
+ break;
+ case REVISION_D:
+ printf("D\n");
+ break;
+ default:
+ printf("unknown 0x%02x\n", beagle_revision);
+ }
+
/* Configure GPIOs to output */
writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe);
writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
@@ -120,8 +139,6 @@ int misc_init_r(void)
writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout);
- beagle_identify();
-
dieid_num_r();
return 0;
@@ -136,8 +153,4 @@ int misc_init_r(void)
void set_muxconf_regs(void)
{
MUX_BEAGLE();
-
- if (beagle_revision_c) {
- MUX_BEAGLE_C();
- }
}
diff --git a/board/ti/beagle/beagle.h b/board/ti/beagle/beagle.h
index 7fe6275..d95fd78 100644
--- a/board/ti/beagle/beagle.h
+++ b/board/ti/beagle/beagle.h
@@ -34,6 +34,11 @@ const omap3_sysinfo sysinfo = {
};
#define BOARD_REVISION_MASK (0x1 << 11)
+/* BeagleBoard revisions */
+#define REVISION_AXBX 0x7
+#define REVISION_CX 0x6
+#define REVISION_C4 0x5
+#define REVISION_D 0x0
/*
* IEN - Input Enable
@@ -264,7 +269,7 @@ const omap3_sysinfo sysinfo = {
MUX_VAL(CP(HDQ_SIO), (IDIS | PTU | EN | M4)) /*GPIO_170*/\
MUX_VAL(CP(MCSPI1_CLK), (IEN | PTU | EN | M4)) /*GPIO_171*/\
MUX_VAL(CP(MCSPI1_SIMO), (IEN | PTU | EN | M4)) /*GPIO_172*/\
- MUX_VAL(CP(MCSPI1_SOMI), (IEN | PTD | DIS | M0)) /*McSPI1_SOMI*/\
+ MUX_VAL(CP(MCSPI1_SOMI), (IEN | PTU | EN | M4)) /*GPIO_173*/\
MUX_VAL(CP(MCSPI1_CS0), (IEN | PTD | EN | M0)) /*McSPI1_CS0*/\
MUX_VAL(CP(MCSPI1_CS1), (IDIS | PTD | EN | M0)) /*McSPI1_CS1*/\
MUX_VAL(CP(MCSPI1_CS2), (IDIS | PTD | DIS | M4)) /*GPIO_176*/\
--
1.6.6.1
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