317 lines
7.0 KiB
C
317 lines
7.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2019 Google LLC
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*/
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#define LOG_CATEGORY UCLASS_SYSINFO
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#include <common.h>
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#include <bloblist.h>
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#include <command.h>
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#include <cros_ec.h>
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#include <dm.h>
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#include <init.h>
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#include <log.h>
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#include <sysinfo.h>
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#include <acpi/acpigen.h>
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#include <asm-generic/gpio.h>
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#include <asm/acpi_nhlt.h>
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#include <asm/cb_sysinfo.h>
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#include <asm/intel_gnvs.h>
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#include <asm/intel_pinctrl.h>
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#include <dm/acpi.h>
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#include <linux/delay.h>
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#include "variant_gpio.h"
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DECLARE_GLOBAL_DATA_PTR;
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struct cros_gpio_info {
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const char *linux_name;
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enum cros_gpio_t type;
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int gpio_num;
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int flags;
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};
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int misc_init_f(void)
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{
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if (!ll_boot_init()) {
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printf("Running as secondary loader");
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if (gd->arch.coreboot_table) {
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int ret;
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printf(" (found coreboot table at %lx)",
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gd->arch.coreboot_table);
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ret = get_coreboot_info(&lib_sysinfo);
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if (ret) {
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printf("\nFailed to parse coreboot tables (err=%d)\n",
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ret);
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return ret;
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}
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}
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printf("\n");
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}
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return 0;
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}
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int arch_misc_init(void)
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{
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return 0;
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}
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static int get_memconfig(struct udevice *dev)
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{
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struct gpio_desc gpios[4];
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int cfg;
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int ret;
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ret = gpio_request_list_by_name(dev, "memconfig-gpios", gpios,
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ARRAY_SIZE(gpios),
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GPIOD_IS_IN | GPIOD_PULL_UP);
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if (ret < 0) {
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log_debug("Cannot get GPIO list '%s' (%d)\n", dev->name, ret);
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return ret;
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}
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/* Give the lines time to settle */
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udelay(10);
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ret = dm_gpio_get_values_as_int(gpios, ARRAY_SIZE(gpios));
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if (ret < 0)
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return log_msg_ret("get", ret);
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cfg = ret;
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ret = gpio_free_list(dev, gpios, ARRAY_SIZE(gpios));
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if (ret)
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return log_msg_ret("free", ret);
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return cfg;
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}
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/**
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* get_skuconfig() - Get the SKU number either from pins or the EC
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*
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* Two options are supported:
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* skuconfig-gpios - two pins in the device tree (tried first)
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* EC - reading from the EC (backup)
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*
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* @dev: sysinfo device to use
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* @return SKU ID, or -ve error if not found
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*/
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static int get_skuconfig(struct udevice *dev)
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{
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struct gpio_desc gpios[2];
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int cfg;
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int ret;
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ret = gpio_request_list_by_name(dev, "skuconfig-gpios", gpios,
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ARRAY_SIZE(gpios),
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GPIOD_IS_IN);
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if (ret != ARRAY_SIZE(gpios)) {
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struct udevice *cros_ec;
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log_debug("Cannot get GPIO list '%s' (%d)\n", dev->name, ret);
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/* Try the EC */
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ret = uclass_first_device_err(UCLASS_CROS_EC, &cros_ec);
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if (ret < 0) {
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log_err("Cannot find EC for SKU details\n");
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return log_msg_ret("sku", ret);
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}
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ret = cros_ec_get_sku_id(cros_ec);
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if (ret < 0) {
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log_err("Cannot read SKU details\n");
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return log_msg_ret("sku", ret);
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}
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return ret;
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}
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ret = dm_gpio_get_values_as_int_base3(gpios, ARRAY_SIZE(gpios));
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if (ret < 0)
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return log_msg_ret("get", ret);
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cfg = ret;
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ret = gpio_free_list(dev, gpios, ARRAY_SIZE(gpios));
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if (ret)
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return log_msg_ret("free", ret);
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return cfg;
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}
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static int coral_get_str(struct udevice *dev, int id, size_t size, char *val)
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{
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int ret;
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if (IS_ENABLED(CONFIG_SPL_BUILD))
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return -ENOSYS;
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switch (id) {
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case SYSINFO_ID_SMBIOS_SYSTEM_VERSION:
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case SYSINFO_ID_SMBIOS_BASEBOARD_VERSION: {
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ret = get_skuconfig(dev);
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if (ret < 0)
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return ret;
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if (size < 15)
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return -ENOSPC;
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sprintf(val, "rev%d", ret);
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break;
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}
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case SYSINFO_ID_BOARD_MODEL: {
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int mem_config, sku_config;
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const char *model;
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ret = get_memconfig(dev);
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if (ret < 0)
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log_warning("Unable to read memconfig (err=%d)\n", ret);
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mem_config = ret;
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ret = get_skuconfig(dev);
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if (ret < 0)
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log_warning("Unable to read skuconfig (err=%d)\n", ret);
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sku_config = ret;
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model = fdt_getprop(gd->fdt_blob, 0, "model", NULL);
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snprintf(val, size, "%s (memconfig %d, SKU %d)", model,
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mem_config, sku_config);
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break;
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}
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default:
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return -ENOENT;
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}
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return 0;
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}
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int chromeos_get_gpio(const struct udevice *dev, const char *prop,
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enum cros_gpio_t type, struct cros_gpio_info *info)
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{
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struct udevice *pinctrl;
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struct gpio_desc desc;
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int ret;
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ret = gpio_request_by_name((struct udevice *)dev, prop, 0, &desc, 0);
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if (ret == -ENOTBLK) {
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info->gpio_num = CROS_GPIO_VIRTUAL;
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log_debug("GPIO '%s' is virtual\n", prop);
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} else if (ret) {
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return log_msg_ret("gpio", ret);
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} else {
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info->gpio_num = desc.offset;
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dm_gpio_free((struct udevice *)dev, &desc);
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}
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info->linux_name = dev_read_string(desc.dev, "linux-name");
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if (!info->linux_name)
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return log_msg_ret("linux-name", -ENOENT);
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info->type = type;
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/* Get ACPI pin from GPIO library if available */
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if (info->gpio_num != CROS_GPIO_VIRTUAL) {
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pinctrl = dev_get_parent(desc.dev);
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info->gpio_num = intel_pinctrl_get_acpi_pin(pinctrl,
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info->gpio_num);
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}
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info->flags = desc.flags & GPIOD_ACTIVE_LOW ? CROS_GPIO_ACTIVE_LOW :
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CROS_GPIO_ACTIVE_HIGH;
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if (!ret)
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dm_gpio_free(desc.dev, &desc);
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return 0;
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}
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static int chromeos_acpi_gpio_generate(const struct udevice *dev,
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struct acpi_ctx *ctx)
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{
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struct cros_gpio_info info[3];
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int count, i;
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int ret;
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count = 3;
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ret = chromeos_get_gpio(dev, "recovery-gpios", CROS_GPIO_REC, &info[0]);
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if (ret)
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return log_msg_ret("rec", ret);
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ret = chromeos_get_gpio(dev, "write-protect-gpios", CROS_GPIO_WP,
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&info[1]);
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if (ret)
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return log_msg_ret("wp", ret);
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ret = chromeos_get_gpio(dev, "phase-enforce-gpios", CROS_GPIO_PE,
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&info[2]);
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if (ret)
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return log_msg_ret("phase", ret);
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acpigen_write_scope(ctx, "\\");
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acpigen_write_name(ctx, "OIPG");
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acpigen_write_package(ctx, count);
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for (i = 0; i < count; i++) {
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acpigen_write_package(ctx, 4);
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acpigen_write_integer(ctx, info[i].type);
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acpigen_write_integer(ctx, info[i].flags);
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acpigen_write_integer(ctx, info[i].gpio_num);
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acpigen_write_string(ctx, info[i].linux_name);
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acpigen_pop_len(ctx);
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}
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acpigen_pop_len(ctx);
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acpigen_pop_len(ctx);
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return 0;
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}
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static int coral_write_acpi_tables(const struct udevice *dev,
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struct acpi_ctx *ctx)
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{
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struct acpi_global_nvs *gnvs;
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struct nhlt *nhlt;
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const char *oem_id = "coral";
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const char *oem_table_id = "coral";
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u32 oem_revision = 3;
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int ret;
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gnvs = bloblist_find(BLOBLISTT_ACPI_GNVS, sizeof(*gnvs));
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if (!gnvs)
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return log_msg_ret("bloblist", -ENOENT);
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nhlt = nhlt_init();
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if (!nhlt)
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return -ENOMEM;
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log_debug("Setting up NHLT\n");
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ret = acpi_setup_nhlt(ctx, nhlt);
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if (ret)
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return log_msg_ret("setup", ret);
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/* Update NHLT GNVS Data */
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gnvs->nhla = (uintptr_t)ctx->current;
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gnvs->nhll = nhlt_current_size(nhlt);
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ret = nhlt_serialise_oem_overrides(ctx, nhlt, oem_id, oem_table_id,
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oem_revision);
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if (ret)
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return log_msg_ret("serialise", ret);
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return 0;
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}
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struct acpi_ops coral_acpi_ops = {
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.write_tables = coral_write_acpi_tables,
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.inject_dsdt = chromeos_acpi_gpio_generate,
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};
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struct sysinfo_ops coral_sysinfo_ops = {
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.get_str = coral_get_str,
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};
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#if !CONFIG_IS_ENABLED(OF_PLATDATA)
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static const struct udevice_id coral_ids[] = {
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{ .compatible = "google,coral" },
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{ }
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};
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#endif
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U_BOOT_DRIVER(coral_drv) = {
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.name = "coral",
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.id = UCLASS_SYSINFO,
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.of_match = of_match_ptr(coral_ids),
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.ops = &coral_sysinfo_ops,
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ACPI_OPS_PTR(&coral_acpi_ops)
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};
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