u-boot/board/st/stm32mp1/stm32mp1.c

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// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
*/
#include <common.h>
#include <adc.h>
#include <config.h>
#include <clk.h>
#include <dm.h>
#include <g_dnl.h>
#include <generic-phy.h>
#include <i2c.h>
#include <led.h>
#include <misc.h>
#include <phy.h>
#include <reset.h>
#include <syscon.h>
#include <usb.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <asm/arch/stm32.h>
#include <power/regulator.h>
#include <usb/dwc2_udc.h>
/* SYSCFG registers */
#define SYSCFG_BOOTR 0x00
#define SYSCFG_PMCSETR 0x04
#define SYSCFG_IOCTRLSETR 0x18
#define SYSCFG_ICNR 0x1C
#define SYSCFG_CMPCR 0x20
#define SYSCFG_CMPENSETR 0x24
#define SYSCFG_PMCCLRR 0x44
#define SYSCFG_BOOTR_BOOT_MASK GENMASK(2, 0)
#define SYSCFG_BOOTR_BOOTPD_SHIFT 4
#define SYSCFG_IOCTRLSETR_HSLVEN_TRACE BIT(0)
#define SYSCFG_IOCTRLSETR_HSLVEN_QUADSPI BIT(1)
#define SYSCFG_IOCTRLSETR_HSLVEN_ETH BIT(2)
#define SYSCFG_IOCTRLSETR_HSLVEN_SDMMC BIT(3)
#define SYSCFG_IOCTRLSETR_HSLVEN_SPI BIT(4)
#define SYSCFG_CMPCR_SW_CTRL BIT(1)
#define SYSCFG_CMPCR_READY BIT(8)
#define SYSCFG_CMPENSETR_MPU_EN BIT(0)
#define SYSCFG_PMCSETR_ETH_CLK_SEL BIT(16)
#define SYSCFG_PMCSETR_ETH_REF_CLK_SEL BIT(17)
#define SYSCFG_PMCSETR_ETH_SELMII BIT(20)
#define SYSCFG_PMCSETR_ETH_SEL_MASK GENMASK(23, 21)
#define SYSCFG_PMCSETR_ETH_SEL_GMII_MII (0 << 21)
#define SYSCFG_PMCSETR_ETH_SEL_RGMII (1 << 21)
#define SYSCFG_PMCSETR_ETH_SEL_RMII (4 << 21)
/*
* Get a global data pointer
*/
DECLARE_GLOBAL_DATA_PTR;
#define USB_WARNING_LOW_THRESHOLD_UV 660000
#define USB_START_LOW_THRESHOLD_UV 1230000
#define USB_START_HIGH_THRESHOLD_UV 2100000
int checkboard(void)
{
int ret;
char *mode;
u32 otp;
struct udevice *dev;
const char *fdt_compat;
int fdt_compat_len;
if (IS_ENABLED(CONFIG_STM32MP1_TRUSTED))
mode = "trusted";
else
mode = "basic";
printf("Board: stm32mp1 in %s mode", mode);
fdt_compat = fdt_getprop(gd->fdt_blob, 0, "compatible",
&fdt_compat_len);
if (fdt_compat && fdt_compat_len)
printf(" (%s)", fdt_compat);
puts("\n");
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(stm32mp_bsec),
&dev);
if (!ret)
ret = misc_read(dev, STM32_BSEC_SHADOW(BSEC_OTP_BOARD),
&otp, sizeof(otp));
if (!ret && otp) {
printf("Board: MB%04x Var%d Rev.%c-%02d\n",
otp >> 16,
(otp >> 12) & 0xF,
((otp >> 8) & 0xF) - 1 + 'A',
otp & 0xF);
}
return 0;
}
static void board_key_check(void)
{
#if defined(CONFIG_FASTBOOT) || defined(CONFIG_CMD_STM32PROG)
ofnode node;
struct gpio_desc gpio;
enum forced_boot_mode boot_mode = BOOT_NORMAL;
node = ofnode_path("/config");
if (!ofnode_valid(node)) {
debug("%s: no /config node?\n", __func__);
return;
}
#ifdef CONFIG_FASTBOOT
if (gpio_request_by_name_nodev(node, "st,fastboot-gpios", 0,
&gpio, GPIOD_IS_IN)) {
debug("%s: could not find a /config/st,fastboot-gpios\n",
__func__);
} else {
if (dm_gpio_get_value(&gpio)) {
puts("Fastboot key pressed, ");
boot_mode = BOOT_FASTBOOT;
}
dm_gpio_free(NULL, &gpio);
}
#endif
#ifdef CONFIG_CMD_STM32PROG
if (gpio_request_by_name_nodev(node, "st,stm32prog-gpios", 0,
&gpio, GPIOD_IS_IN)) {
debug("%s: could not find a /config/st,stm32prog-gpios\n",
__func__);
} else {
if (dm_gpio_get_value(&gpio)) {
puts("STM32Programmer key pressed, ");
boot_mode = BOOT_STM32PROG;
}
dm_gpio_free(NULL, &gpio);
}
#endif
if (boot_mode != BOOT_NORMAL) {
puts("entering download mode...\n");
clrsetbits_le32(TAMP_BOOT_CONTEXT,
TAMP_BOOT_FORCED_MASK,
boot_mode);
}
#endif
}
#if defined(CONFIG_USB_GADGET) && defined(CONFIG_USB_GADGET_DWC2_OTG)
/* STMicroelectronics STUSB1600 Type-C controller */
#define STUSB1600_CC_CONNECTION_STATUS 0x0E
/* STUSB1600_CC_CONNECTION_STATUS bitfields */
#define STUSB1600_CC_ATTACH BIT(0)
static int stusb1600_init(struct udevice **dev_stusb1600)
{
ofnode node;
struct udevice *dev, *bus;
int ret;
u32 chip_addr;
*dev_stusb1600 = NULL;
/* if node stusb1600 is present, means DK1 or DK2 board */
node = ofnode_by_compatible(ofnode_null(), "st,stusb1600");
if (!ofnode_valid(node))
return -ENODEV;
ret = ofnode_read_u32(node, "reg", &chip_addr);
if (ret)
return -EINVAL;
ret = uclass_get_device_by_ofnode(UCLASS_I2C, ofnode_get_parent(node),
&bus);
if (ret) {
printf("bus for stusb1600 not found\n");
return -ENODEV;
}
ret = dm_i2c_probe(bus, chip_addr, 0, &dev);
if (!ret)
*dev_stusb1600 = dev;
return ret;
}
static int stusb1600_cable_connected(struct udevice *dev)
{
u8 status;
if (dm_i2c_read(dev, STUSB1600_CC_CONNECTION_STATUS, &status, 1))
return 0;
return status & STUSB1600_CC_ATTACH;
}
#include <usb/dwc2_udc.h>
int g_dnl_board_usb_cable_connected(void)
{
struct udevice *stusb1600;
struct udevice *dwc2_udc_otg;
int ret;
if (!stusb1600_init(&stusb1600))
return stusb1600_cable_connected(stusb1600);
ret = uclass_get_device_by_driver(UCLASS_USB_GADGET_GENERIC,
DM_GET_DRIVER(dwc2_udc_otg),
&dwc2_udc_otg);
if (!ret)
debug("dwc2_udc_otg init failed\n");
return dwc2_udc_B_session_valid(dwc2_udc_otg);
}
#endif /* CONFIG_USB_GADGET */
static int get_led(struct udevice **dev, char *led_string)
{
char *led_name;
int ret;
led_name = fdtdec_get_config_string(gd->fdt_blob, led_string);
if (!led_name) {
pr_debug("%s: could not find %s config string\n",
__func__, led_string);
return -ENOENT;
}
ret = led_get_by_label(led_name, dev);
if (ret) {
debug("%s: get=%d\n", __func__, ret);
return ret;
}
return 0;
}
static int setup_led(enum led_state_t cmd)
{
struct udevice *dev;
int ret;
ret = get_led(&dev, "u-boot,boot-led");
if (ret)
return ret;
ret = led_set_state(dev, cmd);
return ret;
}
static int board_check_usb_power(void)
{
struct ofnode_phandle_args adc_args;
struct udevice *adc;
struct udevice *led;
ofnode node;
unsigned int raw;
int max_uV = 0;
int ret, uV, adc_count;
u8 i, nb_blink;
node = ofnode_path("/config");
if (!ofnode_valid(node)) {
debug("%s: no /config node?\n", __func__);
return -ENOENT;
}
/*
* Retrieve the ADC channels devices and get measurement
* for each of them
*/
adc_count = ofnode_count_phandle_with_args(node, "st,adc_usb_pd",
"#io-channel-cells");
if (adc_count < 0) {
if (adc_count == -ENOENT)
return 0;
pr_err("%s: can't find adc channel (%d)\n", __func__,
adc_count);
return adc_count;
}
for (i = 0; i < adc_count; i++) {
if (ofnode_parse_phandle_with_args(node, "st,adc_usb_pd",
"#io-channel-cells", 0, i,
&adc_args)) {
pr_debug("%s: can't find /config/st,adc_usb_pd\n",
__func__);
return 0;
}
ret = uclass_get_device_by_ofnode(UCLASS_ADC, adc_args.node,
&adc);
if (ret) {
pr_err("%s: Can't get adc device(%d)\n", __func__,
ret);
return ret;
}
ret = adc_channel_single_shot(adc->name, adc_args.args[0],
&raw);
if (ret) {
pr_err("%s: single shot failed for %s[%d]!\n",
__func__, adc->name, adc_args.args[0]);
return ret;
}
/* Convert to uV */
if (!adc_raw_to_uV(adc, raw, &uV)) {
if (uV > max_uV)
max_uV = uV;
pr_debug("%s: %s[%02d] = %u, %d uV\n", __func__,
adc->name, adc_args.args[0], raw, uV);
} else {
pr_err("%s: Can't get uV value for %s[%d]\n",
__func__, adc->name, adc_args.args[0]);
}
}
/*
* If highest value is inside 1.23 Volts and 2.10 Volts, that means
* board is plugged on an USB-C 3A power supply and boot process can
* continue.
*/
if (max_uV > USB_START_LOW_THRESHOLD_UV &&
max_uV < USB_START_HIGH_THRESHOLD_UV)
return 0;
/* Display warning message and make u-boot,error-led blinking */
pr_err("\n*******************************************\n");
if (max_uV < USB_WARNING_LOW_THRESHOLD_UV) {
pr_err("* WARNING 500mA power supply detected *\n");
nb_blink = 2;
} else {
pr_err("* WARNING 1.5A power supply detected *\n");
nb_blink = 3;
}
pr_err("* Current too low, use a 3A power supply! *\n");
pr_err("*******************************************\n\n");
ret = get_led(&led, "u-boot,error-led");
if (ret)
return ret;
for (i = 0; i < nb_blink * 2; i++) {
led_set_state(led, LEDST_TOGGLE);
mdelay(125);
}
led_set_state(led, LEDST_ON);
return 0;
}
static void sysconf_init(void)
{
#ifndef CONFIG_STM32MP1_TRUSTED
u8 *syscfg;
#ifdef CONFIG_DM_REGULATOR
struct udevice *pwr_dev;
struct udevice *pwr_reg;
struct udevice *dev;
int ret;
u32 otp = 0;
#endif
u32 bootr;
syscfg = (u8 *)syscon_get_first_range(STM32MP_SYSCON_SYSCFG);
/* interconnect update : select master using the port 1 */
/* LTDC = AXI_M9 */
/* GPU = AXI_M8 */
/* today information is hardcoded in U-Boot */
writel(BIT(9), syscfg + SYSCFG_ICNR);
/* disable Pull-Down for boot pin connected to VDD */
bootr = readl(syscfg + SYSCFG_BOOTR);
bootr &= ~(SYSCFG_BOOTR_BOOT_MASK << SYSCFG_BOOTR_BOOTPD_SHIFT);
bootr |= (bootr & SYSCFG_BOOTR_BOOT_MASK) << SYSCFG_BOOTR_BOOTPD_SHIFT;
writel(bootr, syscfg + SYSCFG_BOOTR);
#ifdef CONFIG_DM_REGULATOR
/* High Speed Low Voltage Pad mode Enable for SPI, SDMMC, ETH, QSPI
* and TRACE. Needed above ~50MHz and conditioned by AFMUX selection.
* The customer will have to disable this for low frequencies
* or if AFMUX is selected but the function not used, typically for
* TRACE. Otherwise, impact on power consumption.
*
* WARNING:
* enabling High Speed mode while VDD>2.7V
* with the OTP product_below_2v5 (OTP 18, BIT 13)
* erroneously set to 1 can damage the IC!
* => U-Boot set the register only if VDD < 2.7V (in DT)
* but this value need to be consistent with board design
*/
ret = syscon_get_by_driver_data(STM32MP_SYSCON_PWR, &pwr_dev);
if (!ret) {
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(stm32mp_bsec),
&dev);
if (ret) {
pr_err("Can't find stm32mp_bsec driver\n");
return;
}
ret = misc_read(dev, STM32_BSEC_SHADOW(18), &otp, 4);
if (!ret)
otp = otp & BIT(13);
/* get VDD = pwr-supply */
ret = device_get_supply_regulator(pwr_dev, "pwr-supply",
&pwr_reg);
/* check if VDD is Low Voltage */
if (!ret) {
if (regulator_get_value(pwr_reg) < 2700000) {
writel(SYSCFG_IOCTRLSETR_HSLVEN_TRACE |
SYSCFG_IOCTRLSETR_HSLVEN_QUADSPI |
SYSCFG_IOCTRLSETR_HSLVEN_ETH |
SYSCFG_IOCTRLSETR_HSLVEN_SDMMC |
SYSCFG_IOCTRLSETR_HSLVEN_SPI,
syscfg + SYSCFG_IOCTRLSETR);
if (!otp)
pr_err("product_below_2v5=0: HSLVEN protected by HW\n");
} else {
if (otp)
pr_err("product_below_2v5=1: HSLVEN update is destructive, no update as VDD>2.7V\n");
}
} else {
debug("VDD unknown");
}
}
#endif
/* activate automatic I/O compensation
* warning: need to ensure CSI enabled and ready in clock driver
*/
writel(SYSCFG_CMPENSETR_MPU_EN, syscfg + SYSCFG_CMPENSETR);
while (!(readl(syscfg + SYSCFG_CMPCR) & SYSCFG_CMPCR_READY))
;
clrbits_le32(syscfg + SYSCFG_CMPCR, SYSCFG_CMPCR_SW_CTRL);
#endif
}
/* board dependent setup after realloc */
int board_init(void)
{
struct udevice *dev;
/* address of boot parameters */
gd->bd->bi_boot_params = STM32_DDR_BASE + 0x100;
/* probe all PINCTRL for hog */
for (uclass_first_device(UCLASS_PINCTRL, &dev);
dev;
uclass_next_device(&dev)) {
pr_debug("probe pincontrol = %s\n", dev->name);
}
board_key_check();
sysconf_init();
if (IS_ENABLED(CONFIG_LED))
led_default_state();
return 0;
}
int board_late_init(void)
{
#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
const void *fdt_compat;
int fdt_compat_len;
fdt_compat = fdt_getprop(gd->fdt_blob, 0, "compatible",
&fdt_compat_len);
if (fdt_compat && fdt_compat_len) {
if (strncmp(fdt_compat, "st,", 3) != 0)
env_set("board_name", fdt_compat);
else
env_set("board_name", fdt_compat + 3);
}
#endif
/* for DK1/DK2 boards */
board_check_usb_power();
return 0;
}
void board_quiesce_devices(void)
{
setup_led(LEDST_OFF);
}