| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pnp.h> |
| #include <pc80/keyboard.h> |
| #include <ec/acpi/ec.h> |
| #include <delay.h> |
| |
| #include "chip.h" |
| |
| static void it8518_init(struct device *dev) |
| { |
| const struct ec_roda_it8518_config *const conf = dev->chip_info; |
| |
| if (!dev->enabled) |
| return; |
| |
| printk(BIOS_DEBUG, "Roda IT8518: Initializing keyboard.\n"); |
| pc_keyboard_init(NO_AUX_DEVICE); |
| |
| if (conf && conf->cpuhot_limit) { |
| /* The EC may take very long for the first command on a |
| cold boot (~180ms witnessed). Since we need an incre- |
| dibly long timeout, we do this EC RAM write manually. */ |
| int timeout = 50000; /* 50,000 * 10us = 500ms */ |
| send_ec_command(0x81); |
| while (ec_status() & EC_IBF && --timeout) |
| udelay(10); |
| send_ec_data(0xb2); |
| send_ec_data(conf->cpuhot_limit); |
| } |
| } |
| |
| static struct device_operations ops = { |
| .init = it8518_init, |
| .read_resources = DEVICE_NOOP, |
| .enable_resources = DEVICE_NOOP, |
| }; |
| |
| static struct pnp_info pnp_dev_info[] = { |
| { NULL, 0, 0, 0, } |
| }; |
| |
| static void enable_dev(struct device *dev) |
| { |
| pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info); |
| } |
| |
| struct chip_operations ec_roda_it8518_ops = { |
| CHIP_NAME("Roda IT8518 EC") |
| .enable_dev = enable_dev |
| }; |