diff options
Diffstat (limited to 'board/theobroma-systems/puma_rk3399/puma-rk3399.c')
| -rw-r--r-- | board/theobroma-systems/puma_rk3399/puma-rk3399.c | 135 |
1 files changed, 133 insertions, 2 deletions
diff --git a/board/theobroma-systems/puma_rk3399/puma-rk3399.c b/board/theobroma-systems/puma_rk3399/puma-rk3399.c index 2b4988e2d2..c6690fa069 100644 --- a/board/theobroma-systems/puma_rk3399/puma-rk3399.c +++ b/board/theobroma-systems/puma_rk3399/puma-rk3399.c @@ -7,12 +7,20 @@ #include <common.h> #include <dm.h> #include <misc.h> +#include <spl.h> +#include <syscon.h> +#include <usb.h> #include <dm/pinctrl.h> #include <dm/uclass-internal.h> +#include <asm/io.h> +#include <asm/gpio.h> #include <asm/setup.h> +#include <asm/arch/clock.h> +#include <asm/arch/cru_rk3399.h> +#include <asm/arch/hardware.h> +#include <asm/arch/grf_rk3399.h> #include <asm/arch/periph.h> #include <power/regulator.h> -#include <spl.h> #include <u-boot/sha256.h> DECLARE_GLOBAL_DATA_PTR; @@ -32,9 +40,50 @@ int board_init(void) 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 @@ -128,17 +177,32 @@ static void setup_serial(void) serialno = crc32_no_comp(0, low, 8); serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32; - snprintf(serialno_str, sizeof(serialno_str), "%llx", serialno); + snprintf(serialno_str, sizeof(serialno_str), "%016llx", serialno); env_set("cpuid#", cpuid_str); env_set("serial#", serialno_str); #endif } +static void setup_iodomain(void) +{ + const u32 GRF_IO_VSEL_GPIO4CD_SHIFT = 3; + struct rk3399_grf_regs *grf = + syscon_get_first_range(ROCKCHIP_SYSCON_GRF); + + /* + * Set bit 3 in GRF_IO_VSEL so PCIE_RST# works (pin GPIO4_C6). + * Linux assumes that PCIE_RST# works out of the box as it probes + * PCIe before loading the iodomain driver. + */ + rk_setreg(&grf->io_vsel, 1 << GRF_IO_VSEL_GPIO4CD_SHIFT); +} + int misc_init_r(void) { setup_serial(); setup_macaddr(); + setup_iodomain(); return 0; } @@ -158,3 +222,70 @@ void get_board_serial(struct tag_serialnr *serialnr) 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, ®name); + 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, ®ulator); + 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); +} |