u-boot-brain/board/dhelectronics/dh_imx6/dh_imx6.c
Ludwig Zenz 4a6f5b4f56 ARM: imx6: DHCOM i.MX6 PDK: Switch to DM for I2C
This patch enables DM I2C for DHCOM i.MX6 PDK2 boards and
removes non DM I2C code. The I2C EEPROM with ethaddr (MAC)
is defined in the device tree. Use UCLASS_I2C_EEPROM
to find the device by fixed hardware path and read the ethaddr.

Tested with DHCOM i.MX6dl and DHCOM i.MX6q.

Signed-off-by: Ludwig Zenz <lzenz@dh-electronics.com>
Reviewed-by: Marek Vasut <marex@denx.de>
2019-07-19 20:32:24 +02:00

282 lines
5.5 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* DHCOM DH-iMX6 PDK board support
*
* Copyright (C) 2017 Marek Vasut <marex@denx.de>
*/
#include <common.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <asm/arch/clock.h>
#include <asm/arch/crm_regs.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/iomux.h>
#include <asm/arch/mx6-pins.h>
#include <asm/arch/sys_proto.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/mach-imx/boot_mode.h>
#include <asm/mach-imx/iomux-v3.h>
#include <asm/mach-imx/sata.h>
#include <ahci.h>
#include <dwc_ahsata.h>
#include <environment.h>
#include <errno.h>
#include <fsl_esdhc_imx.h>
#include <fuse.h>
#include <i2c_eeprom.h>
#include <miiphy.h>
#include <mmc.h>
#include <net.h>
#include <netdev.h>
#include <usb.h>
#include <usb/ehci-ci.h>
DECLARE_GLOBAL_DATA_PTR;
int dram_init(void)
{
gd->ram_size = imx_ddr_size();
return 0;
}
/*
* Do not overwrite the console
* Use always serial for U-Boot console
*/
int overwrite_console(void)
{
return 1;
}
#ifdef CONFIG_FEC_MXC
static void eth_phy_reset(void)
{
/* Reset PHY */
gpio_direction_output(IMX_GPIO_NR(5, 0) , 0);
udelay(500);
gpio_set_value(IMX_GPIO_NR(5, 0), 1);
/* Enable VIO */
gpio_direction_output(IMX_GPIO_NR(1, 7) , 0);
/*
* KSZ9021 PHY needs at least 10 mSec after PHY reset
* is released to stabilize
*/
mdelay(10);
}
static int setup_fec_clock(void)
{
struct iomuxc *iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
/* set gpr1[21] to select anatop clock */
clrsetbits_le32(&iomuxc_regs->gpr[1], 0x1 << 21, 0x1 << 21);
return enable_fec_anatop_clock(0, ENET_50MHZ);
}
int board_eth_init(bd_t *bis)
{
uint32_t base = IMX_FEC_BASE;
struct mii_dev *bus = NULL;
struct phy_device *phydev = NULL;
gpio_request(IMX_GPIO_NR(5, 0), "PHY-reset");
gpio_request(IMX_GPIO_NR(1, 7), "VIO");
setup_fec_clock();
eth_phy_reset();
bus = fec_get_miibus(base, -1);
if (!bus)
return -EINVAL;
/* Scan PHY 0 */
phydev = phy_find_by_mask(bus, 0xf, PHY_INTERFACE_MODE_RGMII);
if (!phydev) {
printf("Ethernet PHY not found!\n");
return -EINVAL;
}
return fec_probe(bis, -1, base, bus, phydev);
}
#endif
#ifdef CONFIG_USB_EHCI_MX6
static void setup_usb(void)
{
/*
* Set daisy chain for otg_pin_id on MX6Q.
* For MX6DL, this bit is reserved.
*/
imx_iomux_set_gpr_register(1, 13, 1, 0);
}
int board_usb_phy_mode(int port)
{
if (port == 1)
return USB_INIT_HOST;
else
return USB_INIT_DEVICE;
}
#endif
static int setup_dhcom_mac_from_fuse(void)
{
struct udevice *dev;
ofnode eeprom;
unsigned char enetaddr[6];
int ret;
ret = eth_env_get_enetaddr("ethaddr", enetaddr);
if (ret) /* ethaddr is already set */
return 0;
imx_get_mac_from_fuse(0, enetaddr);
if (is_valid_ethaddr(enetaddr)) {
eth_env_set_enetaddr("ethaddr", enetaddr);
return 0;
}
eeprom = ofnode_path("/soc/aips-bus@2100000/i2c@21a8000/eeprom@50");
if (!ofnode_valid(eeprom)) {
printf("Invalid hardware path to EEPROM!\n");
return -ENODEV;
}
ret = uclass_get_device_by_ofnode(UCLASS_I2C_EEPROM, eeprom, &dev);
if (ret) {
printf("Cannot find EEPROM!\n");
return ret;
}
ret = i2c_eeprom_read(dev, 0xfa, enetaddr, 0x6);
if (ret) {
printf("Error reading configuration EEPROM!\n");
return ret;
}
if (is_valid_ethaddr(enetaddr))
eth_env_set_enetaddr("ethaddr", enetaddr);
return 0;
}
int board_early_init_f(void)
{
#ifdef CONFIG_USB_EHCI_MX6
setup_usb();
#endif
return 0;
}
int board_init(void)
{
struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
/* address of boot parameters */
gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
/* Enable eim_slow clocks */
setbits_le32(&mxc_ccm->CCGR6, 0x1 << MXC_CCM_CCGR6_EMI_SLOW_OFFSET);
setup_dhcom_mac_from_fuse();
return 0;
}
#ifdef CONFIG_CMD_BMODE
static const struct boot_mode board_boot_modes[] = {
/* 4 bit bus width */
{"sd2", MAKE_CFGVAL(0x40, 0x28, 0x00, 0x00)},
{"sd3", MAKE_CFGVAL(0x40, 0x30, 0x00, 0x00)},
/* 8 bit bus width */
{"emmc", MAKE_CFGVAL(0x40, 0x38, 0x00, 0x00)},
{NULL, 0},
};
#endif
#define HW_CODE_BIT_0 IMX_GPIO_NR(2, 19)
#define HW_CODE_BIT_1 IMX_GPIO_NR(6, 6)
#define HW_CODE_BIT_2 IMX_GPIO_NR(2, 16)
static int board_get_hwcode(void)
{
int hw_code;
gpio_request(HW_CODE_BIT_0, "HW-code-bit-0");
gpio_request(HW_CODE_BIT_1, "HW-code-bit-1");
gpio_request(HW_CODE_BIT_2, "HW-code-bit-2");
gpio_direction_input(HW_CODE_BIT_0);
gpio_direction_input(HW_CODE_BIT_1);
gpio_direction_input(HW_CODE_BIT_2);
/* HW 100 + HW 200 = 00b; HW 300 = 01b */
hw_code = ((gpio_get_value(HW_CODE_BIT_2) << 2) |
(gpio_get_value(HW_CODE_BIT_1) << 1) |
gpio_get_value(HW_CODE_BIT_0)) + 2;
return hw_code;
}
int board_late_init(void)
{
u32 hw_code;
char buf[16];
hw_code = board_get_hwcode();
switch (get_cpu_type()) {
case MXC_CPU_MX6SOLO:
snprintf(buf, sizeof(buf), "imx6s-dhcom%1d", hw_code);
break;
case MXC_CPU_MX6DL:
snprintf(buf, sizeof(buf), "imx6dl-dhcom%1d", hw_code);
break;
case MXC_CPU_MX6D:
snprintf(buf, sizeof(buf), "imx6d-dhcom%1d", hw_code);
break;
case MXC_CPU_MX6Q:
snprintf(buf, sizeof(buf), "imx6q-dhcom%1d", hw_code);
break;
default:
snprintf(buf, sizeof(buf), "UNKNOWN%1d", hw_code);
break;
}
env_set("dhcom", buf);
#ifdef CONFIG_CMD_BMODE
add_board_boot_modes(board_boot_modes);
#endif
return 0;
}
int checkboard(void)
{
puts("Board: DHCOM i.MX6\n");
return 0;
}
#ifdef CONFIG_MULTI_DTB_FIT
int board_fit_config_name_match(const char *name)
{
if (is_mx6dq()) {
if (!strcmp(name, "imx6q-dhcom-pdk2"))
return 0;
} else if (is_mx6sdl()) {
if (!strcmp(name, "imx6dl-dhcom-pdk2"))
return 0;
}
return -1;
}
#endif