From 3a540c9746d080d3e45e820081684da4f14d28a2 Mon Sep 17 00:00:00 2001
From: Dirk Behme dirk.behme@googlemail.com Date: Tue, 5 Jan 2010 20:04:27 +0530 Subject: [PATCH] OMAP3: Beagle: Update revision detection
New BeagleBoard revision C4 uses a new ID. Update revision detection.
Signed-off-by: Dirk Behme dirk.behme@googlemail.com --- board/ti/beagle/beagle.c | 64 ++++++++++++++++++++++++++++----------------- board/ti/beagle/beagle.h | 8 ++++- 2 files changed, 46 insertions(+), 26 deletions(-)
diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c index 32d501e..17840cf 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 +60,57 @@ 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; - } + 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);
printf("Board revision "); - if (beagle_revision_c) - printf("C\n"); - else + + switch (beagle_revision) { + case REVISION_AXBX: printf("Ax/Bx\n"); + break; + case REVISION_CX: + printf("C1/C2/C3\n"); + break; + case REVISION_C4: + printf("C4\n"); + break; + case REVISION_D: + printf("D\n"); + break; + default: + printf("unknown 0x%02x\n", beagle_revision); + } }
/* @@ -137,7 +153,7 @@ void set_muxconf_regs(void) { MUX_BEAGLE();
- if (beagle_revision_c) { + if (beagle_revision != REVISION_AXBX) { MUX_BEAGLE_C(); } } diff --git a/board/ti/beagle/beagle.h b/board/ti/beagle/beagle.h index 7fe6275..b1720c9 100644 --- a/board/ti/beagle/beagle.h +++ b/board/ti/beagle/beagle.h @@ -33,7 +33,11 @@ const omap3_sysinfo sysinfo = { #endif };
-#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 +268,7 @@ 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*/\