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am335x evm: Initial support for AM335x GP EVM Profiles

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The AM335x GP EVM can have one of 8 different profiles selected.  Each
profile has a different set of peripherals and requires different pinmux
configurations that conflict with other profiles.  i2c1 is an example of
a conflicted mux currently.

Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Tom Rini 2012-08-08 09:03:07 -07:00 committed by Albert ARIBAUD
parent 38d4a6042b
commit 036fd65a8c
1 changed files with 42 additions and 4 deletions
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46
board/ti/am335x/mux.c
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@ -17,6 +17,7 @@
#include <asm/arch/sys_proto.h>
#include <asm/arch/hardware.h>
#include <asm/io.h>
#include <i2c.h>
#define MUX_CFG(value, offset) \
__raw_writel(value, (CTRL_BASE + offset));
@ -364,22 +365,59 @@ void enable_i2c0_pin_mux(void)
configure_module_pin_mux(i2c0_pin_mux);
}
/*
* The AM335x GP EVM, if daughter card(s) are connected, can have 8
* different profiles. These profiles determine what peripherals are
* valid and need pinmux to be configured.
*/
#define PROFILE_NONE 0x0
#define PROFILE_0 (1 << 0)
#define PROFILE_1 (1 << 1)
#define PROFILE_2 (1 << 2)
#define PROFILE_3 (1 << 3)
#define PROFILE_4 (1 << 4)
#define PROFILE_5 (1 << 5)
#define PROFILE_6 (1 << 6)
#define PROFILE_7 (1 << 7)
#define PROFILE_MASK 0x7
#define PROFILE_ALL 0xFF
/* CPLD registers */
#define I2C_CPLD_ADDR 0x35
#define CFG_REG 0x10
static unsigned short detect_daughter_board_profile(void)
{
unsigned short val;
if (i2c_probe(I2C_CPLD_ADDR))
return PROFILE_NONE;
if (i2c_read(I2C_CPLD_ADDR, CFG_REG, 1, (unsigned char *)(&val), 2))
return PROFILE_NONE;
return (1 << (val & PROFILE_MASK));
}
void enable_board_pin_mux(struct am335x_baseboard_id *header)
{
/* Enable pinmux that is common to all TI boards. */
configure_module_pin_mux(i2c1_pin_mux);
/* Now do board-specific muxes. */
/* Do board-specific muxes. */
if (!strncmp(header->name, "A335BONE", HDR_NAME_LEN)) {
/* Beaglebone pinmux */
configure_module_pin_mux(i2c1_pin_mux);
configure_module_pin_mux(mii1_pin_mux);
configure_module_pin_mux(mmc0_pin_mux);
} else if (!strncmp(header->config, "SKU#01", 6)) {
/* General Purpose EVM */
unsigned short profile = detect_daughter_board_profile();
configure_module_pin_mux(rgmii1_pin_mux);
configure_module_pin_mux(mmc0_pin_mux);
/* In profile #2 i2c1 and spi0 conflict. */
if (profile & ~PROFILE_2)
configure_module_pin_mux(i2c1_pin_mux);
} else if (!strncmp(header->name, "A335X_SK", HDR_NAME_LEN)) {
/* Starter Kit EVM */
configure_module_pin_mux(i2c1_pin_mux);
configure_module_pin_mux(gpio0_7_pin_mux);
configure_module_pin_mux(rgmii1_pin_mux);
configure_module_pin_mux(mmc0_pin_mux_sk_evm);