08375b5082
Change-Id: I9ed1a82fcd3fc29124ddc406592bd45dc84d4628 Signed-off-by: Elyes Haouas <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/82666 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Yu-Ping Wu <yupingso@google.com> Reviewed-by: Yidi Lin <yidilin@google.com>
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <acpi/acpigen_dsm.h>
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#include <acpi/acpi_device.h>
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#include <assert.h>
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#include <device/device.h>
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#include <stdio.h>
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#include "chip.h"
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#include <gpio.h>
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#include <console/console.h>
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#if CONFIG(HAVE_ACPI_TABLES)
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static void i2c_hid_fill_dsm(const struct device *dev)
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{
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struct drivers_i2c_hid_config *config = dev->chip_info;
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struct dsm_i2c_hid_config dsm_config = {
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.hid_desc_reg_offset = config->hid_desc_reg_offset,
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};
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acpigen_write_dsm_i2c_hid(&dsm_config);
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}
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static void i2c_hid_fill_ssdt_generator(const struct device *dev)
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{
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struct drivers_i2c_hid_config *config = dev->chip_info;
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config->generic.cid = I2C_HID_CID;
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i2c_generic_fill_ssdt(dev, &i2c_hid_fill_dsm, &config->generic);
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}
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static const char *i2c_hid_acpi_name(const struct device *dev)
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{
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static char name[5];
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struct drivers_i2c_hid_config *config = dev->chip_info;
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if (config->generic.name)
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return config->generic.name;
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snprintf(name, sizeof(name), "H%03.3X", dev->path.i2c.device);
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name[4] = '\0';
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return name;
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}
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#endif
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static struct device_operations i2c_hid_ops = {
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.read_resources = noop_read_resources,
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.set_resources = noop_set_resources,
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#if CONFIG(HAVE_ACPI_TABLES)
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.acpi_name = i2c_hid_acpi_name,
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.acpi_fill_ssdt = i2c_hid_fill_ssdt_generator,
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#endif
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};
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static void i2c_hid_enable(struct device *dev)
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{
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struct drivers_i2c_hid_config *config = dev->chip_info;
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if (!config)
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return;
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/* Check if device is present by reading GPIO */
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if (config->generic.device_present_gpio) {
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int present = gpio_get(config->generic.device_present_gpio);
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present ^= config->generic.device_present_gpio_invert;
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printk(BIOS_INFO, "%s is %spresent\n",
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dev->chip_ops->name, present ? "" : "not ");
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if (!present) {
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dev->enabled = 0;
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return;
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}
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}
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/*
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* Ensure that I2C HID devices use level triggered interrupts as per ACPI
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* I2C HID requirement. Check interrupt and GPIO interrupt.
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*/
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if ((!config->generic.irq_gpio.pin_count &&
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config->generic.irq.mode != ACPI_IRQ_LEVEL_TRIGGERED) ||
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(config->generic.irq_gpio.pin_count &&
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config->generic.irq_gpio.irq.mode != ACPI_IRQ_LEVEL_TRIGGERED)) {
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printk(BIOS_ERR, "%s IRQ is not level triggered.\n", config->generic.hid);
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BUG();
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}
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dev->ops = &i2c_hid_ops;
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if (config && config->generic.desc) {
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dev->name = config->generic.desc;
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}
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}
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struct chip_operations drivers_i2c_hid_ops = {
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.name = "I2C HID Device",
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.enable_dev = i2c_hid_enable
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};
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