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