u-boot/board/theobroma-systems/puma_rk3399/puma-rk3399.c

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/*
* (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <misc.h>
#include <spl.h>
#include <usb.h>
#include <dm/pinctrl.h>
#include <dm/uclass-internal.h>
#include <asm/gpio.h>
#include <asm/setup.h>
#include <asm/arch/clock.h>
#include <asm/arch/cru_rk3399.h>
#include <asm/arch/periph.h>
#include <power/regulator.h>
#include <u-boot/sha256.h>
DECLARE_GLOBAL_DATA_PTR;
int board_init(void)
{
int ret;
/*
* We need to call into regulators_enable_boot_on() again, as the call
* during SPL may have not included all regulators.
*/
ret = regulators_enable_boot_on(false);
if (ret)
debug("%s: Cannot enable boot on regulator\n", __func__);
return 0;
}
static void rk3399_force_power_on_reset(void)
{
ofnode node;
struct gpio_desc sysreset_gpio;
debug("%s: trying to force a power-on reset\n", __func__);
node = ofnode_path("/config");
if (!ofnode_valid(node)) {
debug("%s: no /config node?\n", __func__);
return;
}
if (gpio_request_by_name_nodev(node, "sysreset-gpio", 0,
&sysreset_gpio, GPIOD_IS_OUT)) {
debug("%s: could not find a /config/sysreset-gpio\n", __func__);
return;
}
dm_gpio_set_value(&sysreset_gpio, 1);
}
void spl_board_init(void)
{
int ret;
struct rk3399_cru *cru = rockchip_get_cru();
/*
* The RK3399 resets only 'almost all logic' (see also in the TRM
* "3.9.4 Global software reset"), when issuing a software reset.
* This may cause issues during boot-up for some configurations of
* the application software stack.
*
* To work around this, we test whether the last reset reason was
* a power-on reset and (if not) issue an overtemp-reset to reset
* the entire module.
*
* While this was previously fixed by modifying the various places
* that could generate a software reset (e.g. U-Boot's sysreset
* driver, the ATF or Linux), we now have it here to ensure that
* we no longer have to track this through the various components.
*/
if (cru->glb_rst_st != 0)
rk3399_force_power_on_reset();
/*
* Turning the eMMC and SPI back on (if disabled via the Qseven
* BIOS_ENABLE) signal is done through a always-on regulator).
*/
ret = regulators_enable_boot_on(false);
if (ret)
debug("%s: Cannot enable boot on regulator\n", __func__);
preloader_console_init();
}
static void setup_macaddr(void)
{
#if CONFIG_IS_ENABLED(CMD_NET)
int ret;
const char *cpuid = env_get("cpuid#");
u8 hash[SHA256_SUM_LEN];
int size = sizeof(hash);
u8 mac_addr[6];
/* Only generate a MAC address, if none is set in the environment */
if (env_get("ethaddr"))
return;
if (!cpuid) {
debug("%s: could not retrieve 'cpuid#'\n", __func__);
return;
}
ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size);
if (ret) {
debug("%s: failed to calculate SHA256\n", __func__);
return;
}
/* Copy 6 bytes of the hash to base the MAC address on */
memcpy(mac_addr, hash, 6);
/* Make this a valid MAC address and set it */
mac_addr[0] &= 0xfe; /* clear multicast bit */
mac_addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
eth_env_set_enetaddr("ethaddr", mac_addr);
#endif
}
static void setup_serial(void)
{
#if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE)
const u32 cpuid_offset = 0x7;
const u32 cpuid_length = 0x10;
struct udevice *dev;
int ret, i;
u8 cpuid[cpuid_length];
u8 low[cpuid_length/2], high[cpuid_length/2];
char cpuid_str[cpuid_length * 2 + 1];
u64 serialno;
char serialno_str[17];
/* retrieve the device */
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(rockchip_efuse), &dev);
if (ret) {
debug("%s: could not find efuse device\n", __func__);
return;
}
/* read the cpu_id range from the efuses */
ret = misc_read(dev, cpuid_offset, &cpuid, sizeof(cpuid));
if (ret) {
debug("%s: reading cpuid from the efuses failed\n",
__func__);
return;
}
memset(cpuid_str, 0, sizeof(cpuid_str));
for (i = 0; i < 16; i++)
sprintf(&cpuid_str[i * 2], "%02x", cpuid[i]);
debug("cpuid: %s\n", cpuid_str);
/*
* Mix the cpuid bytes using the same rules as in
* ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c
*/
for (i = 0; i < 8; i++) {
low[i] = cpuid[1 + (i << 1)];
high[i] = cpuid[i << 1];
}
serialno = crc32_no_comp(0, low, 8);
serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32;
snprintf(serialno_str, sizeof(serialno_str), "%llx", serialno);
env_set("cpuid#", cpuid_str);
env_set("serial#", serialno_str);
#endif
}
int misc_init_r(void)
{
setup_serial();
setup_macaddr();
return 0;
}
#ifdef CONFIG_SERIAL_TAG
void get_board_serial(struct tag_serialnr *serialnr)
{
char *serial_string;
u64 serial = 0;
serial_string = env_get("serial#");
if (serial_string)
serial = simple_strtoull(serial_string, NULL, 16);
serialnr->high = (u32)(serial >> 32);
serialnr->low = (u32)(serial & 0xffffffff);
}
#endif
/**
* Switch power at an external regulator (for our root hub).
*
* @param ctrl pointer to the xHCI controller
* @param port port number as in the control message (one-based)
* @param enable boolean indicating whether to enable or disable power
* @return returns 0 on success, an error-code on failure
*/
static int board_usb_port_power_set(struct udevice *dev, int port,
bool enable)
{
#if CONFIG_IS_ENABLED(OF_CONTROL) && CONFIG_IS_ENABLED(DM_REGULATOR)
/* We start counting ports at 0, while USB counts from 1. */
int index = port - 1;
const char *regname = NULL;
struct udevice *regulator;
const char *prop = "tsd,usb-port-power";
int ret;
debug("%s: ctrl '%s' port %d enable %s\n", __func__,
dev_read_name(dev), port, enable ? "true" : "false");
ret = dev_read_string_index(dev, prop, index, &regname);
if (ret < 0) {
debug("%s: ctrl '%s' port %d: no entry in '%s'\n",
__func__, dev_read_name(dev), port, prop);
return ret;
}
ret = regulator_get_by_platname(regname, &regulator);
if (ret) {
debug("%s: ctrl '%s' port %d: could not get regulator '%s'\n",
__func__, dev_read_name(dev), port, regname);
return ret;
}
regulator_set_enable(regulator, enable);
return 0;
#else
return -ENOTSUPP;
#endif
}
void usb_hub_reset_devices(struct usb_hub_device *hub, int port)
{
struct udevice *dev = hub->pusb_dev->dev;
struct udevice *ctrl;
/* We are only interested in our root-hubs */
if (usb_hub_is_root_hub(dev) == false)
return;
ctrl = usb_get_bus(dev);
if (!ctrl) {
debug("%s: could not retrieve ctrl for hub\n", __func__);
return;
}
/*
* To work around an incompatibility between the single-threaded
* USB stack in U-Boot and (a strange low-power mode of) the USB
* hub we have on-module, we need to delay powering on the hub
* until the first time the port is probed.
*/
board_usb_port_power_set(ctrl, port, true);
}