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arm: omap4: panda: Add reading of the board revision

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Detect if we are running on a panda revision A1-A6,
or an ES panda board. This can be done by reading
the level of GPIOs and checking the processor revisions.
This should result in:
Panda 4430:
     GPIO171, GPIO101, GPIO182: 0 1 1 => A1-A5
     GPIO171, GPIO101, GPIO182: 1 0 1 => A6
Panda ES:
     GPIO2, GPIO3, GPIO171, GPIO48, GPIO182: 0 0 0 1 1 => B1/B2
     GPIO2, GPIO3, GPIO171, GPIO48, GPIO182: 0 0 1 1 1 => B3

Set the board name appropriately for the board revision that
is detected.

Update the findfdt macro to load the a4 device tree binary.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
[trini: %s/CONTROL_PADCONF_CORE/(*ctrl)->control_padconf_core_base/ and
 formatting for that]
Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Dan Murphy 2013-06-13 11:21:13 -05:00 committed by Tom Rini
parent 45dbbf29bb
commit 7d47d1caa0
2 changed files with 75 additions and 5 deletions
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78
board/ti/panda/panda.c
View File

@ -37,6 +37,11 @@
#endif
#define PANDA_ULPI_PHY_TYPE_GPIO 182
#define PANDA_BOARD_ID_1_GPIO 101
#define PANDA_ES_BOARD_ID_1_GPIO 48
#define PANDA_BOARD_ID_2_GPIO 171
#define PANDA_ES_BOARD_ID_3_GPIO 3
#define PANDA_ES_BOARD_ID_4_GPIO 2
DECLARE_GLOBAL_DATA_PTR;
@ -66,6 +71,73 @@ int board_eth_init(bd_t *bis)
return 0;
}
/*
* Routine: get_board_revision
* Description: Detect if we are running on a panda revision A1-A6,
* or an ES panda board. This can be done by reading
* the level of GPIOs and checking the processor revisions.
* This should result in:
* Panda 4430:
* GPIO171, GPIO101, GPIO182: 0 1 1 => A1-A5
* GPIO171, GPIO101, GPIO182: 1 0 1 => A6
* Panda ES:
* GPIO2, GPIO3, GPIO171, GPIO48, GPIO182: 0 0 0 1 1 => B1/B2
* GPIO2, GPIO3, GPIO171, GPIO48, GPIO182: 0 0 1 1 1 => B3
*/
int get_board_revision(void)
{
int board_id0, board_id1, board_id2;
int board_id3, board_id4;
int board_id;
int processor_rev = omap_revision();
/* Setup the mux for the common board ID pins (gpio 171 and 182) */
writew((IEN | M3), (*ctrl)->control_padconf_core_base + UNIPRO_TX0);
writew((IEN | M3), (*ctrl)->control_padconf_core_base + FREF_CLK2_OUT);
board_id0 = gpio_get_value(PANDA_ULPI_PHY_TYPE_GPIO);
board_id2 = gpio_get_value(PANDA_BOARD_ID_2_GPIO);
if ((processor_rev >= OMAP4460_ES1_0 &&
processor_rev <= OMAP4460_ES1_1)) {
/*
* Setup the mux for the ES specific board ID pins (gpio 101,
* 2 and 3.
*/
writew((IEN | M3), (*ctrl)->control_padconf_core_base +
GPMC_A24);
writew((IEN | M3), (*ctrl)->control_padconf_core_base +
UNIPRO_RY0);
writew((IEN | M3), (*ctrl)->control_padconf_core_base +
UNIPRO_RX1);
board_id1 = gpio_get_value(PANDA_ES_BOARD_ID_1_GPIO);
board_id3 = gpio_get_value(PANDA_ES_BOARD_ID_3_GPIO);
board_id4 = gpio_get_value(PANDA_ES_BOARD_ID_4_GPIO);
#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
setenv("board_name", strcat(CONFIG_SYS_BOARD, "-es"));
#endif
board_id = ((board_id4 << 4) | (board_id3 << 3) |
(board_id2 << 2) | (board_id1 << 1) | (board_id0));
} else {
/* Setup the mux for the Ax specific board ID pins (gpio 101) */
writew((IEN | M3), (*ctrl)->control_padconf_core_base +
FREF_CLK2_OUT);
board_id1 = gpio_get_value(PANDA_BOARD_ID_1_GPIO);
board_id = ((board_id2 << 2) | (board_id1 << 1) | (board_id0));
#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
if ((board_id >= 0x3) && (processor_rev == OMAP4430_ES2_3))
setenv("board_name", strcat(CONFIG_SYS_BOARD, "-a4"));
#endif
}
return board_id;
}
/**
* @brief misc_init_r - Configure Panda board specific configurations
* such as power configurations, ethernet initialization as phase2 of
@ -82,11 +154,7 @@ int misc_init_r(void)
if (omap_revision() == OMAP4430_ES1_0)
return 0;
#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
if (omap_revision() >= OMAP4460_ES1_0 ||
omap_revision() <= OMAP4460_ES1_1)
setenv("board_name", strcat(CONFIG_SYS_BOARD, "-es"));
#endif
get_board_revision();
gpio_direction_input(PANDA_ULPI_PHY_TYPE_GPIO);
phy_type = gpio_get_value(PANDA_ULPI_PHY_TYPE_GPIO);

2
include/configs/omap4_common.h
View File

@ -178,6 +178,8 @@
"setenv fdtfile omap4-sdp.dtb; fi; " \
"if test $board_name = panda; then " \
"setenv fdtfile omap4-panda.dtb; fi;" \
"if test $board_name = panda-a4; then " \
"setenv fdtfile omap4-panda-a4.dtb; fi;" \
"if test $board_name = panda-es; then " \
"setenv fdtfile omap4-panda-es.dtb; fi;" \
"if test $fdtfile = undefined; then " \