src/drivers/i2c/cs42l42/cs42l42.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
   9 #include "chip.h"
  10
  11 #define CS42L42_ACPI_NAME       "CRUS"
  12 #define CS42L42_ACPI_HID        "10134242"
  13
  14 static void cs42l42_fill_ssdt(const struct device *dev)
  15 {
  16         struct drivers_i2c_cs42l42_config *config = dev->chip_info;
  17         const char *scope = acpi_device_scope(dev);
  18         const char *path = acpi_device_path(dev);
  19         struct acpi_i2c i2c = {
  20                 .address = dev->path.i2c.device,
  21                 .mode_10bit = dev->path.i2c.mode_10bit,
  22                 .speed = config->bus_speed ? : I2C_SPEED_FAST,
  23                 .resource = scope,
  24         };
  25         struct acpi_dp *dsd;
  26         int gpio_index = 0;
  27
  28         if (!scope)
  29                 return;
  30
  31         /* Device */
  32         acpigen_write_scope(scope);
  33         acpigen_write_device(acpi_device_name(dev));
  34         acpigen_write_name_string("_HID", CS42L42_ACPI_HID);
  35         acpigen_write_name_integer("_UID", 0);
  36         acpigen_write_name_string("_DDN", dev->chip_ops->name);
  37         acpigen_write_STA(acpi_device_status(dev));
  38
  39         /* Resources */
  40         acpigen_write_name("_CRS");
  41         acpigen_write_resourcetemplate_header();
  42         acpi_device_write_i2c(&i2c);
  43         /* Use either Interrupt() or GpioInt() */
  44         if (config->irq_gpio.pin_count)
  45                 acpi_device_write_gpio(&config->irq_gpio);
  46         else
  47                 acpi_device_write_interrupt(&config->irq);
  48
  49         /* for cs42l42reset gpio */
  50         if (config->reset_gpio.pin_count)
  51                 acpi_device_write_gpio(&config->reset_gpio);
  52
  53         acpigen_write_resourcetemplate_footer();
  54
  55         /* AAD Child Device Properties */
  56         dsd = acpi_dp_new_table("_DSD");
  57         if (config->irq_gpio.pin_count)
  58                 acpi_dp_add_gpio(dsd, "irq-gpios", path,
  59                          gpio_index++,  /* Index = 0 */
  60                          0,  /* Pin = 0 (There is a single pin in the GPIO resource). */
  61                          config->irq_gpio.active_low);
  62         if (config->reset_gpio.pin_count)
  63                 acpi_dp_add_gpio(dsd, "reset-gpios", path,
  64                          gpio_index++,  /* Index = 0 or 1 (if irq gpio is written). */
  65                          0,  /* Pin = 0 (There is a single pin in the GPIO resource). */
  66                          config->reset_gpio.active_low);
  67         acpi_dp_add_integer(dsd, "cirrus,ts-inv", config->ts_inv ? 1 : 0);
  68         acpi_dp_add_integer(dsd, "cirrus,ts-dbnc-rise", config->ts_dbnc_rise);
  69         acpi_dp_add_integer(dsd, "cirrus,ts-dbnc-fall", config->ts_dbnc_fall);
  70         acpi_dp_add_integer(dsd, "cirrus,btn-det-init-dbnce", config->btn_det_init_dbnce);
  71
  72         if (config->btn_det_init_dbnce > 200) {
  73                 printk(BIOS_ERR, "%s: Incorrect btn_det_init_dbnce(%d). Using default of 100ms\n",
  74                                 __func__, config->btn_det_init_dbnce);
  75                 config->btn_det_init_dbnce = 100;
  76         }
  77
  78         acpi_dp_add_integer(dsd, "cirrus,btn-det-event-dbnce", config->btn_det_event_dbnce);
  79
  80         if (config->btn_det_event_dbnce > 100) {
  81                 printk(BIOS_ERR, "%s: Incorrect btn_det_event_dbnce(%d). Using default of 10ms\n",
  82                                 __func__, config->btn_det_event_dbnce);
  83                 config->btn_det_event_dbnce = 10;
  84         }
  85
  86         acpi_dp_add_integer_array(dsd, "cirrus,bias-lvls", config->bias_lvls, 4);
  87         acpi_dp_add_integer(dsd, "cirrus,hs-bias-ramp-rate", config->hs_bias_ramp_rate);
  88         if (config->hs_bias_sense_disable)
  89                 acpi_dp_add_integer(dsd, "cirrus,hs-bias-sense-disable", 1);
  90
  91         /* Write Device Property Hierarchy */
  92         acpi_dp_write(dsd);
  93
  94         acpigen_pop_len(); /* Device */
  95         acpigen_pop_len(); /* Scope */
  96
  97         printk(BIOS_INFO, "%s: %s address 0%xh irq %d\n",
  98                acpi_device_path(dev), dev->chip_ops->name,
  99                dev->path.i2c.device, config->irq.pin);
 100 }
 101
 102 static const char *cs42l42_acpi_name(const struct device *dev)
 103 {
 104         return CS42L42_ACPI_NAME;
 105 }
 106
 107 static struct device_operations cs42l42_ops = {
 108         .read_resources         = noop_read_resources,
 109         .set_resources          = noop_set_resources,
 110         .acpi_name              = cs42l42_acpi_name,
 111         .acpi_fill_ssdt         = cs42l42_fill_ssdt,
 112 };
 113
 114 static void cs42l42_enable(struct device *dev)
 115 {
 116         dev->ops = &cs42l42_ops;
 117 }
 118
 119 struct chip_operations drivers_i2c_cs42l42_ops = {
 120         .name = "Cirrus Logic CS42l42 Audio Codec",
 121         .enable_dev = cs42l42_enable
 122 };