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ARMV7: OMAP: Add detection and support for Beagle C4 revision

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This patch enhances the revision detection function and adds
support for the C4 revision.  The board revision is printed
and approriate revision specific setup is done automatically.

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
This commit is contained in:
Steve Sakoman 2010-08-12 15:17:37 -07:00 committed by Sandeep Paulraj
parent c2d5b34120
commit 06b95bd50d
2 changed files with 58 additions and 39 deletions
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90
board/ti/beagle/beagle.c
View File

@ -38,8 +38,6 @@
#include <asm/mach-types.h>
#include "beagle.h"
static int beagle_revision_c;
/*
* Routine: board_init
* Description: Early hardware init.
@ -58,43 +56,40 @@ 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.
* Routine: get_board_revision
* Description: Detect if we are running on a Beagle revision Ax/Bx,
* C1/2/3, or C4. 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
*/
int beagle_get_revision(void)
int get_board_revision(void)
{
return beagle_revision_c;
}
int 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.
*/
void beagle_identify(void)
{
beagle_revision_c = 0;
if (!omap_request_gpio(171)) {
unsigned int val;
if (!omap_request_gpio(171) &&
!omap_request_gpio(172) &&
!omap_request_gpio(173)) {
omap_set_gpio_direction(171, 1);
val = omap_get_gpio_datain(171);
omap_free_gpio(171);
omap_set_gpio_direction(172, 1);
omap_set_gpio_direction(173, 1);
if (val)
beagle_revision_c = 0;
else
beagle_revision_c = 1;
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);
} else {
printf("Error: unable to acquire board revision GPIOs\n");
revision = -1;
}
printf("Board revision ");
if (beagle_revision_c)
printf("C\n");
else
printf("Ax/Bx\n");
return revision;
}
/*
@ -106,6 +101,33 @@ int misc_init_r(void)
struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE;
struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
switch (get_board_revision()) {
case REVISION_AXBX:
printf("Beagle Rev Ax/Bx\n");
setenv("beaglerev", "AxBx");
setenv("mpurate", "600");
break;
case REVISION_CX:
printf("Beagle Rev C1/C2/C3\n");
setenv("beaglerev", "Cx");
setenv("mpurate", "600");
MUX_BEAGLE_C();
break;
case REVISION_C4:
printf("Beagle Rev C4\n");
setenv("beaglerev", "Cx");
setenv("mpurate", "720");
MUX_BEAGLE_C();
/* Set VAUX2 to 1.8V for EHCI PHY */
twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
TWL4030_PM_RECEIVER_DEV_GRP_P1);
break;
default:
printf("Beagle unknown 0x%02x\n", get_board_revision());
}
twl4030_power_init();
twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
@ -120,8 +142,6 @@ 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 +156,4 @@ int misc_init_r(void)
void set_muxconf_regs(void)
{
MUX_BEAGLE();
if (beagle_revision_c) {
MUX_BEAGLE_C();
}
}

7
board/ti/beagle/beagle.h
View File

@ -33,7 +33,10 @@ 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
/*
* IEN - Input Enable
@ -264,7 +267,7 @@ 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*/\