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am33xx: Add support for TI AM335x StarterKit EVM

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- Board requires gpio0 #7 to be set to power DDR3.
- Board uses DDR3, add a way to determine which DDR type to call
  config_ddr with.
- Both of the above require filling in the header structure early, move
  it into the data section.

Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Tom Rini 2012-07-31 08:55:01 -07:00 committed by Albert ARIBAUD
parent 973b663820
commit 65d750be59
3 changed files with 50 additions and 2 deletions
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41
arch/arm/cpu/armv7/am33xx/board.c
View File

@ -29,6 +29,7 @@
#include <asm/io.h>
#include <asm/omap_common.h>
#include <asm/emif.h>
#include <asm/gpio.h>
#include <i2c.h>
#include <miiphy.h>
#include <cpsw.h>
@ -52,6 +53,9 @@ const struct gpio_bank *const omap_gpio_bank = gpio_bank_am33xx;
#define MII_MODE_ENABLE 0x0
#define RGMII_MODE_ENABLE 0xA
/* GPIO that controls power to DDR on EVM-SK */
#define GPIO_DDR_VTT_EN 7
static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
/*
@ -72,13 +76,18 @@ struct am335x_baseboard_id {
char mac_addr[NO_OF_MAC_ADDR][ETH_ALEN];
};
static struct am335x_baseboard_id header;
static struct am335x_baseboard_id __attribute__((section (".data"))) header;
static inline int board_is_bone(void)
{
return !strncmp(header.name, "A335BONE", NAME_LEN);
}
static inline int board_is_evm_sk(void)
{
return !strncmp("A335X_SK", header.name, NAME_LEN);
}
/*
* Read header information from EEPROM into global structure.
*/
@ -144,6 +153,18 @@ static void init_timer(void)
}
#endif
/*
* Determine what type of DDR we have.
*/
static short inline board_memory_type(void)
{
/* The following boards are known to use DDR3. */
if (board_is_evm_sk())
return EMIF_REG_SDRAM_TYPE_DDR3;
return EMIF_REG_SDRAM_TYPE_DDR2;
}
/*
* early system init of muxing and clocks.
*/
@ -185,7 +206,23 @@ void s_init(void)
preloader_console_init();
config_ddr(EMIF_REG_SDRAM_TYPE_DDR2);
/* Initalize the board header */
enable_i2c0_pin_mux();
i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
if (read_eeprom() < 0)
puts("Could not get board ID.\n");
if (board_is_evm_sk()) {
/*
* EVM SK 1.2A and later use gpio0_7 to enable DDR3.
* This is safe enough to do on older revs.
*/
enable_gpio0_7_pin_mux();
gpio_request(GPIO_DDR_VTT_EN, "ddr_vtt_en");
gpio_direction_output(GPIO_DDR_VTT_EN, 1);
}
config_ddr(board_memory_type());
#endif
/* Enable MMC0 */

1
arch/arm/include/asm/arch-am33xx/common_def.h
View File

@ -18,6 +18,7 @@
extern void enable_uart0_pin_mux(void);
extern void enable_mmc0_pin_mux(void);
extern void enable_gpio0_7_pin_mux(void);
extern void enable_i2c0_pin_mux(void);
extern void enable_mii1_pin_mux(void);
extern void enable_rgmii1_pin_mux(void);

10
board/ti/am335x/mux.c
View File

@ -288,6 +288,11 @@ static struct module_pin_mux i2c1_pin_mux[] = {
{-1},
};
static struct module_pin_mux gpio0_7_pin_mux[] = {
{OFFSET(ecap0_in_pwm0_out), (MODE(7) | PULLUDEN)}, /* GPIO0_7 */
{-1},
};
static struct module_pin_mux rgmii1_pin_mux[] = {
{OFFSET(mii1_txen), MODE(2)}, /* RGMII1_TCTL */
{OFFSET(mii1_rxdv), MODE(2) | RXACTIVE}, /* RGMII1_RCTL */
@ -370,3 +375,8 @@ void enable_mii1_pin_mux(void)
{
configure_module_pin_mux(mii1_pin_mux);
}
void enable_gpio0_7_pin_mux(void)
{
configure_module_pin_mux(gpio0_7_pin_mux);
}