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arm: mvebu: theadorable: Add USB power toggle and tweak USB PHY register

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This patch adds an USB power toggle for theadorable. Additionally, the
USB PHY RX Channel Control 0 Register is changed to fix some issues
noticed while accessing some specific USB sticks.

Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Stefan Roese 2016-04-07 10:48:13 +02:00
parent b23005cec3
commit ced0d849d8
1 changed files with 32 additions and 0 deletions
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32
board/theadorable/theadorable.c
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@ -5,6 +5,7 @@
*/
#include <common.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/soc.h>
@ -19,6 +20,10 @@
DECLARE_GLOBAL_DATA_PTR;
#define MV_USB_PHY_BASE (MVEBU_AXP_USB_BASE + 0x800)
#define PHY_CHANNEL_RX_CTRL0_REG(port, chan) \
(MV_USB_PHY_BASE + ((port) << 12) + ((chan) << 6) + 0x8)
#define THEADORABLE_GPP_OUT_ENA_LOW 0x00336780
#define THEADORABLE_GPP_OUT_ENA_MID 0x00003cf0
#define THEADORABLE_GPP_OUT_ENA_HIGH (~(0x0))
@ -27,6 +32,9 @@ DECLARE_GLOBAL_DATA_PTR;
#define THEADORABLE_GPP_OUT_VAL_MID 0x0007000c
#define THEADORABLE_GPP_OUT_VAL_HIGH 0x00000000
#define GPIO_USB0_PWR_ON 18
#define GPIO_USB1_PWR_ON 19
/* DDR3 static configuration */
static MV_DRAM_MC_INIT ddr3_theadorable[MV_MAX_DDR3_STATIC_SIZE] = {
{0x00001400, 0x7301ca28}, /* DDR SDRAM Configuration Register */
@ -135,6 +143,8 @@ int board_early_init_f(void)
int board_init(void)
{
int ret;
/* adress of boot parameters */
gd->bd->bi_boot_params = mvebu_sdram_bar(0) + 0x100;
@ -147,6 +157,28 @@ int board_init(void)
mbus_dt_setup_win(&mbus_state, SPI_BUS1_DEV2_BASE, SPI_BUS0_DEV1_SIZE,
CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_SPI1_CS2);
/*
* Set RX Channel Control 0 Register:
* Tests have shown, that setting the LPF_COEF from 0 (1/8)
* to 3 (1/1) results in a more stable USB connection.
*/
setbits_le32(PHY_CHANNEL_RX_CTRL0_REG(0, 1), 0xc);
setbits_le32(PHY_CHANNEL_RX_CTRL0_REG(0, 2), 0xc);
setbits_le32(PHY_CHANNEL_RX_CTRL0_REG(0, 3), 0xc);
/* Toggle USB power */
ret = gpio_request(GPIO_USB0_PWR_ON, "USB0_PWR_ON");
if (ret < 0)
return ret;
gpio_direction_output(GPIO_USB0_PWR_ON, 0);
ret = gpio_request(GPIO_USB1_PWR_ON, "USB1_PWR_ON");
if (ret < 0)
return ret;
gpio_direction_output(GPIO_USB1_PWR_ON, 0);
mdelay(1);
gpio_set_value(GPIO_USB0_PWR_ON, 1);
gpio_set_value(GPIO_USB1_PWR_ON, 1);
return 0;
}