src/drivers/i2c/max98396/max98396.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpi_device.h>
   4 #include <acpi/acpigen.h>
   5 #include <console/console.h>
   6 #include <device/i2c_simple.h>
   7 #include <device/device.h>
   8 #include <stdio.h>
   9
  10 #include "chip.h"
  11
  12 #define MAX98396_ACPI_HID "ADS8396"
  13
  14 static void max98396_fill_ssdt(const struct device *dev)
  15 {
  16         struct drivers_i2c_max98396_config *config = dev->chip_info;
  17         const char *scope = acpi_device_scope(dev);
  18         struct acpi_i2c i2c = {
  19                 .address = dev->path.i2c.device,
  20                 .mode_10bit = dev->path.i2c.mode_10bit,
  21                 .speed = config->bus_speed ? : I2C_SPEED_FAST,
  22                 .resource = scope,
  23         };
  24         struct acpi_dp *dp;
  25         const char *path = acpi_device_path(dev);
  26
  27         if (!scope) {
  28                 printk(BIOS_ERR, "%s: dev not enabled\n", __func__);
  29                 return;
  30         }
  31
  32         /* Device */
  33         acpigen_write_scope(scope);
  34         acpigen_write_device(acpi_device_name(dev));
  35         acpigen_write_name_string("_HID", MAX98396_ACPI_HID);
  36         acpigen_write_name_integer("_UID", config->uid);
  37         if (config->desc)
  38                 acpigen_write_name_string("_DDN", config->desc);
  39         acpigen_write_STA(acpi_device_status(dev));
  40
  41         /* Resources */
  42         acpigen_write_name("_CRS");
  43         acpigen_write_resourcetemplate_header();
  44         acpi_device_write_i2c(&i2c);
  45         if (config->reset_gpio.pin_count)
  46                 acpi_device_write_gpio(&config->reset_gpio);
  47         acpigen_write_resourcetemplate_footer();
  48
  49         /* Device Properties */
  50         dp = acpi_dp_new_table("_DSD");
  51
  52         acpi_dp_add_integer(dp, "adi,vmon-slot-no", config->vmon_slot_no);
  53         acpi_dp_add_integer(dp, "adi,imon-slot-no", config->imon_slot_no);
  54         acpi_dp_add_integer(dp, "adi,spkfb-slot-no", config->spkfb_slot_no);
  55         if (config->reset_gpio.pin_count)
  56                 acpi_dp_add_gpio(dp, "reset-gpios", path,
  57                                 0,  /* Index = 0 */
  58                                 0,  /* Pin = 0 */
  59                                 config->reset_gpio.active_low);
  60         acpi_dp_write(dp);
  61
  62         acpigen_write_device_end();
  63         acpigen_write_scope_end();
  64
  65         printk(BIOS_INFO, "%s: %s address 0%xh\n", acpi_device_path(dev),
  66                 dev->chip_ops->name, dev->path.i2c.device);
  67 }
  68
  69 static const char *max98396_acpi_name(const struct device *dev)
  70 {
  71         struct drivers_i2c_max98396_config *config = dev->chip_info;
  72         static char name[ACPI_NAME_BUFFER_SIZE];
  73
  74         if (config->name && strlen(config->name) == 4)
  75                 return config->name;
  76
  77         snprintf(name, sizeof(name), "D%03.3X", dev->path.i2c.device);
  78         return name;
  79 }
  80
  81 static struct device_operations max98396_ops = {
  82         .read_resources         = noop_read_resources,
  83         .set_resources          = noop_set_resources,
  84         .acpi_name              = max98396_acpi_name,
  85         .acpi_fill_ssdt         = max98396_fill_ssdt,
  86 };
  87
  88 static void max98396_enable(struct device *dev)
  89 {
  90         struct drivers_i2c_max98396_config *config = dev->chip_info;
  91
  92         dev->ops = &max98396_ops;
  93
  94         if (config->desc)
  95                 dev->name = config->desc;
  96 }
  97
  98 struct chip_operations drivers_i2c_max98396_ops = {
  99         .name = "Maxim MAX98396 Codec",
 100         .enable_dev = max98396_enable
 101 };