mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 17:58:23 +00:00
6f8c2d4906
This patch adds basic support for the Marvell Armada 7K DB-88F7040 development board. Supported are the following interfaces: - UART - SPI (incl. SPI NOR) - I2C - USB - SATA / AHCI Support for other interfaces will follow. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Nadav Haklai <nadavh@marvell.com> Cc: Neta Zur Hershkovits <neta@marvell.com> Cc: Kostya Porotchkin <kostap@marvell.com> Cc: Omri Itach <omrii@marvell.com> Cc: Igal Liberman <igall@marvell.com> Cc: Haim Boot <hayim@marvell.com> Cc: Hanna Hawa <hannah@marvell.com>
152 lines
3.3 KiB
C
152 lines
3.3 KiB
C
/*
|
|
* Copyright (C) 2016 Stefan Roese <sr@denx.de>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <i2c.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/cpu.h>
|
|
#include <asm/arch/soc.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
/* IO expander I2C device */
|
|
#define I2C_IO_EXP_ADDR 0x21
|
|
#define I2C_IO_CFG_REG_0 0x6
|
|
#define I2C_IO_DATA_OUT_REG_0 0x2
|
|
/* VBus enable */
|
|
#define I2C_IO_REG_0_USB_H0_OFF 0
|
|
#define I2C_IO_REG_0_USB_H1_OFF 1
|
|
#define I2C_IO_REG_VBUS ((1 << I2C_IO_REG_0_USB_H0_OFF) | \
|
|
(1 << I2C_IO_REG_0_USB_H1_OFF))
|
|
/* Current limit */
|
|
#define I2C_IO_REG_0_USB_H0_CL 4
|
|
#define I2C_IO_REG_0_USB_H1_CL 5
|
|
#define I2C_IO_REG_CL ((1 << I2C_IO_REG_0_USB_H0_CL) | \
|
|
(1 << I2C_IO_REG_0_USB_H1_CL))
|
|
|
|
static int usb_enabled = 0;
|
|
|
|
/* Board specific xHCI dis-/enable code */
|
|
|
|
/*
|
|
* Set USB VBUS signals (via I2C IO expander/GPIO) as output and set
|
|
* output value as disabled
|
|
*
|
|
* Set USB Current Limit signals (via I2C IO expander/GPIO) as output
|
|
* and set output value as enabled
|
|
*/
|
|
int board_xhci_config(void)
|
|
{
|
|
struct udevice *dev;
|
|
int ret;
|
|
u8 buf[8];
|
|
|
|
/* Configure IO exander PCA9555: 7bit address 0x21 */
|
|
ret = i2c_get_chip_for_busnum(0, I2C_IO_EXP_ADDR, 1, &dev);
|
|
if (ret) {
|
|
printf("Cannot find PCA9555: %d\n", ret);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Read configuration (direction) and set VBUS pin as output
|
|
* (reset pin = output)
|
|
*/
|
|
ret = dm_i2c_read(dev, I2C_IO_CFG_REG_0, buf, 1);
|
|
if (ret) {
|
|
printf("Failed to read IO expander value via I2C\n");
|
|
return -EIO;
|
|
}
|
|
buf[0] &= ~I2C_IO_REG_VBUS;
|
|
buf[0] &= ~I2C_IO_REG_CL;
|
|
ret = dm_i2c_write(dev, I2C_IO_CFG_REG_0, buf, 1);
|
|
if (ret) {
|
|
printf("Failed to set IO expander via I2C\n");
|
|
return -EIO;
|
|
}
|
|
|
|
/* Read output value and configure it */
|
|
ret = dm_i2c_read(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
|
|
if (ret) {
|
|
printf("Failed to read IO expander value via I2C\n");
|
|
return -EIO;
|
|
}
|
|
buf[0] &= ~I2C_IO_REG_VBUS;
|
|
buf[0] |= I2C_IO_REG_CL;
|
|
ret = dm_i2c_write(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
|
|
if (ret) {
|
|
printf("Failed to set IO expander via I2C\n");
|
|
return -EIO;
|
|
}
|
|
|
|
mdelay(500); /* required delay to let output value settle */
|
|
|
|
return 0;
|
|
}
|
|
|
|
int board_xhci_enable(void)
|
|
{
|
|
struct udevice *dev;
|
|
int ret;
|
|
u8 buf[8];
|
|
|
|
/*
|
|
* This function enables all USB ports simultaniously,
|
|
* it only needs to get called once
|
|
*/
|
|
if (usb_enabled)
|
|
return 0;
|
|
|
|
/* Configure IO exander PCA9555: 7bit address 0x21 */
|
|
ret = i2c_get_chip_for_busnum(0, I2C_IO_EXP_ADDR, 1, &dev);
|
|
if (ret) {
|
|
printf("Cannot find PCA9555: %d\n", ret);
|
|
return 0;
|
|
}
|
|
|
|
/* Read VBUS output value */
|
|
ret = dm_i2c_read(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
|
|
if (ret) {
|
|
printf("Failed to read IO expander value via I2C\n");
|
|
return -EIO;
|
|
}
|
|
|
|
/* Enable VBUS power: Set output value of VBUS pin as enabled */
|
|
buf[0] |= I2C_IO_REG_VBUS;
|
|
ret = dm_i2c_write(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
|
|
if (ret) {
|
|
printf("Failed to set IO expander via I2C\n");
|
|
return -EIO;
|
|
}
|
|
|
|
mdelay(500); /* required delay to let output value settle */
|
|
usb_enabled = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int board_early_init_f(void)
|
|
{
|
|
/* Nothing to do (yet), perhaps later some pin-muxing etc */
|
|
|
|
return 0;
|
|
}
|
|
|
|
int board_init(void)
|
|
{
|
|
/* adress of boot parameters */
|
|
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int board_late_init(void)
|
|
{
|
|
/* Pre-configure the USB ports (overcurrent, VBus) */
|
|
board_xhci_config();
|
|
|
|
return 0;
|
|
}
|