drivers/platform/x86/x86-android-tablets/x86-android-tablets.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later
   2  *
   3  * DMI based code to deal with broken DSDTs on X86 tablets which ship with
   4  * Android as (part of) the factory image. The factory kernels shipped on these
   5  * devices typically have a bunch of things hardcoded, rather than specified
   6  * in their DSDT.
   7  *
   8  * Copyright (C) 2021-2023 Hans de Goede <hdegoede@redhat.com>
   9  */
  10 #ifndef __PDX86_X86_ANDROID_TABLETS_H
  11 #define __PDX86_X86_ANDROID_TABLETS_H
  12
  13 #include <linux/gpio/consumer.h>
  14 #include <linux/gpio_keys.h>
  15 #include <linux/i2c.h>
  16 #include <linux/irqdomain_defs.h>
  17 #include <linux/spi/spi.h>
  18
  19 struct gpio_desc;
  20 struct gpiod_lookup_table;
  21 struct platform_device_info;
  22 struct software_node;
  23
  24 /*
  25  * Helpers to get Linux IRQ numbers given a description of the IRQ source
  26  * (either IOAPIC index, or GPIO chip name + pin-number).
  27  */
  28 enum x86_acpi_irq_type {
  29         X86_ACPI_IRQ_TYPE_NONE,
  30         X86_ACPI_IRQ_TYPE_APIC,
  31         X86_ACPI_IRQ_TYPE_GPIOINT,
  32         X86_ACPI_IRQ_TYPE_PMIC,
  33 };
  34
  35 struct x86_acpi_irq_data {
  36         char *chip;   /* GPIO chip label (GPIOINT) or PMIC ACPI path (PMIC) */
  37         enum x86_acpi_irq_type type;
  38         enum irq_domain_bus_token domain;
  39         int index;
  40         int trigger;  /* ACPI_EDGE_SENSITIVE / ACPI_LEVEL_SENSITIVE */
  41         int polarity; /* ACPI_ACTIVE_HIGH / ACPI_ACTIVE_LOW / ACPI_ACTIVE_BOTH */
  42         bool free_gpio; /* Release GPIO after getting IRQ (for TYPE_GPIOINT) */
  43         const char *con_id;
  44 };
  45
  46 /* Structs to describe devices to instantiate */
  47 struct x86_i2c_client_info {
  48         struct i2c_board_info board_info;
  49         char *adapter_path;
  50         struct x86_acpi_irq_data irq_data;
  51 };
  52
  53 struct x86_spi_dev_info {
  54         struct spi_board_info board_info;
  55         char *ctrl_path;
  56         struct x86_acpi_irq_data irq_data;
  57 };
  58
  59 struct x86_serdev_info {
  60         const char *ctrl_hid;
  61         const char *ctrl_uid;
  62         const char *ctrl_devname;
  63         /*
  64          * ATM the serdev core only supports of or ACPI matching; and so far all
  65          * Android x86 tablets DSDTs have usable serdev nodes, but sometimes
  66          * under the wrong controller. So we just tie the existing serdev ACPI
  67          * node to the right controller.
  68          */
  69         const char *serdev_hid;
  70 };
  71
  72 struct x86_gpio_button {
  73         struct gpio_keys_button button;
  74         const char *chip;
  75         int pin;
  76 };
  77
  78 struct x86_dev_info {
  79         const char * const *modules;
  80         const struct software_node *bat_swnode;
  81         struct gpiod_lookup_table * const *gpiod_lookup_tables;
  82         const struct x86_i2c_client_info *i2c_client_info;
  83         const struct x86_spi_dev_info *spi_dev_info;
  84         const struct platform_device_info *pdev_info;
  85         const struct x86_serdev_info *serdev_info;
  86         const struct x86_gpio_button *gpio_button;
  87         int i2c_client_count;
  88         int spi_dev_count;
  89         int pdev_count;
  90         int serdev_count;
  91         int gpio_button_count;
  92         int (*init)(struct device *dev);
  93         void (*exit)(void);
  94         bool use_pci_devname;
  95 };
  96
  97 int x86_android_tablet_get_gpiod(const char *chip, int pin, const char *con_id,
  98                                  bool active_low, enum gpiod_flags dflags,
  99                                  struct gpio_desc **desc);
 100 int x86_acpi_irq_helper_get(const struct x86_acpi_irq_data *data);
 101
 102 /*
 103  * Extern declarations of x86_dev_info structs so there can be a single
 104  * MODULE_DEVICE_TABLE(dmi, ...), while splitting the board descriptions.
 105  */
 106 extern const struct x86_dev_info acer_b1_750_info;
 107 extern const struct x86_dev_info advantech_mica_071_info;
 108 extern const struct x86_dev_info asus_me176c_info;
 109 extern const struct x86_dev_info asus_tf103c_info;
 110 extern const struct x86_dev_info chuwi_hi8_info;
 111 extern const struct x86_dev_info cyberbook_t116_info;
 112 extern const struct x86_dev_info czc_p10t;
 113 extern const struct x86_dev_info lenovo_yogabook_x90_info;
 114 extern const struct x86_dev_info lenovo_yogabook_x91_info;
 115 extern const struct x86_dev_info lenovo_yoga_tab2_830_1050_info;
 116 extern const struct x86_dev_info lenovo_yoga_tab2_1380_info;
 117 extern const struct x86_dev_info lenovo_yt3_info;
 118 extern const struct x86_dev_info medion_lifetab_s10346_info;
 119 extern const struct x86_dev_info nextbook_ares8_info;
 120 extern const struct x86_dev_info nextbook_ares8a_info;
 121 extern const struct x86_dev_info peaq_c1010_info;
 122 extern const struct x86_dev_info whitelabel_tm800a550l_info;
 123 extern const struct x86_dev_info vexia_edu_atla10_info;
 124 extern const struct x86_dev_info xiaomi_mipad2_info;
 125 extern const struct dmi_system_id x86_android_tablet_ids[];
 126
 127 #endif