src/drivers/i2c/max98390/max98390.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include <acpi/acpi_device.h>
   4 #include <acpi/acpigen.h>
   5 #include <console/console.h>
   6 #include <device/i2c.h>
   7 #include <device/device.h>
   8 #include <identity.h>
   9 #include <stdint.h>
  10 #include <stdio.h>
  11 #include <vendorcode/google/dsm_calib.h>
  12 #include "chip.h"
  13
  14 #define MAX98390_ACPI_HID "MX98390"
  15
  16 #define MAX98390_DP_INT(key, val) acpi_dp_add_integer(dp, "maxim," key, (val))
  17
  18 static void max98390_fill_ssdt(const struct device *dev)
  19 {
  20         struct drivers_i2c_max98390_config *config = dev->chip_info;
  21         const char *scope = acpi_device_scope(dev);
  22         struct acpi_i2c i2c = {
  23                 .address = dev->path.i2c.device,
  24                 .mode_10bit = dev->path.i2c.mode_10bit,
  25                 .speed = I2C_SPEED_FAST,
  26                 .resource = scope,
  27         };
  28         struct acpi_dp *dp = NULL;
  29         uint64_t r0_value, temp_value;
  30         char dsm_name[80] = {};
  31
  32         if (!scope)
  33                 return;
  34
  35         /* Device */
  36         acpigen_write_scope(scope);
  37         acpigen_write_device(acpi_device_name(dev));
  38         acpigen_write_name_string("_HID", MAX98390_ACPI_HID);
  39         acpigen_write_name_integer("_UID", config->uid);
  40         acpigen_write_name_string("_DDN", config->desc);
  41         acpigen_write_STA(acpi_device_status(dev));
  42
  43         /* Resources */
  44         acpigen_write_name("_CRS");
  45         acpigen_write_resourcetemplate_header();
  46         acpi_device_write_i2c(&i2c);
  47         acpigen_write_resourcetemplate_footer();
  48
  49         /* Device Properties */
  50         if (CONFIG(GOOGLE_DSM_CALIB)) {
  51                 if (get_dsm_calibration_from_key(config->r0_calib_key, &r0_value)
  52                     || get_dsm_calibration_from_key(config->temperature_calib_key,
  53                                                     &temp_value)) {
  54                         printk(BIOS_ERR,
  55                                "Failed to get dsm_calib parameters from VPD"
  56                                " with key %s and %s\n",
  57                                config->r0_calib_key, config->temperature_calib_key);
  58                 } else {
  59                         dp = acpi_dp_new_table("_DSD");
  60                         MAX98390_DP_INT("r0_calib", r0_value);
  61                         MAX98390_DP_INT("temperature_calib", temp_value);
  62                         printk(BIOS_INFO, "set dsm_calib properties\n");
  63                 }
  64         }
  65
  66         if (CONFIG(GOOGLE_DSM_PARAM_FILE_NAME)) {
  67                 if (config->dsm_param_file_name) {
  68                         if (!dp)
  69                                 dp = acpi_dp_new_table("_DSD");
  70
  71                         size_t chars = snprintf(dsm_name, sizeof(dsm_name), "%s_%s_%s.bin",
  72                                         config->dsm_param_file_name, mainboard_vendor,
  73                                         mainboard_part_number);
  74
  75                         if (chars >= sizeof(dsm_name))
  76                                 printk(BIOS_ERR, "String too long in %s\n", __func__);
  77
  78                         acpi_dp_add_string(dp, "maxim,dsm_param_name", dsm_name);
  79                 }
  80         }
  81
  82         if (!dp)
  83                 dp = acpi_dp_new_table("_DSD");
  84
  85         acpi_dp_add_integer(dp, "maxim,vmon-slot-no", config->vmon_slot_no);
  86         acpi_dp_add_integer(dp, "maxim,imon-slot-no", config->imon_slot_no);
  87
  88         if (dp)
  89                 acpi_dp_write(dp);
  90
  91         acpigen_pop_len(); /* Device */
  92         acpigen_pop_len(); /* Scope */
  93
  94         printk(BIOS_INFO, "%s: %s address 0%xh\n", acpi_device_path(dev), dev->chip_ops->name,
  95                dev->path.i2c.device);
  96 }
  97
  98 static const char *max98390_acpi_name(const struct device *dev)
  99 {
 100         struct drivers_i2c_max98390_config *config = dev->chip_info;
 101         static char name[5];
 102
 103         if (config->name)
 104                 return config->name;
 105
 106         snprintf(name, sizeof(name), "D%03.3X", dev->path.i2c.device);
 107         return name;
 108 }
 109
 110 static struct device_operations max98390_ops = {
 111         .read_resources = noop_read_resources,
 112         .set_resources = noop_set_resources,
 113         .acpi_name = max98390_acpi_name,
 114         .acpi_fill_ssdt = max98390_fill_ssdt,
 115 };
 116
 117 static void max98390_enable(struct device *dev)
 118 {
 119         struct drivers_i2c_max98390_config *config = dev->chip_info;
 120
 121         if (!config)
 122                 return;
 123
 124         dev->ops = &max98390_ops;
 125
 126         /* Name the device as per description provided in devicetree */
 127         if (config->desc)
 128                 dev->name = config->desc;
 129 }
 130
 131 struct chip_operations drivers_i2c_max98390_ops = {
 132         .name = "Maxim MAX98390 Codec",
 133         .enable_dev = max98390_enable
 134 };