linux/drivers/platform/x86/x86-android-tablets.c
Rafael J. Wysocki f7e62c5890 platform/x86: Replace acpi_bus_get_device()
Replace acpi_bus_get_device() that is going to be dropped with
acpi_fetch_acpi_dev().

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/2631712.mvXUDI8C0e@kreacher
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2022-02-03 11:55:57 +01:00

956 lines
25 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* DMI based code to deal with broken DSDTs on X86 tablets which ship with
* Android as (part of) the factory image. The factory kernels shipped on these
* devices typically have a bunch of things hardcoded, rather than specified
* in their DSDT.
*
* Copyright (C) 2021 Hans de Goede <hdegoede@redhat.com>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio/driver.h>
#include <linux/gpio/machine.h>
#include <linux/i2c.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/power/bq24190_charger.h>
#include <linux/serdev.h>
#include <linux/string.h>
/* For gpio_get_desc() which is EXPORT_SYMBOL_GPL() */
#include "../../gpio/gpiolib.h"
#include "../../gpio/gpiolib-acpi.h"
/*
* Helper code to get Linux IRQ numbers given a description of the IRQ source
* (either IOAPIC index, or GPIO chip name + pin-number).
*/
enum x86_acpi_irq_type {
X86_ACPI_IRQ_TYPE_NONE,
X86_ACPI_IRQ_TYPE_APIC,
X86_ACPI_IRQ_TYPE_GPIOINT,
X86_ACPI_IRQ_TYPE_PMIC,
};
struct x86_acpi_irq_data {
char *chip; /* GPIO chip label (GPIOINT) or PMIC ACPI path (PMIC) */
enum x86_acpi_irq_type type;
enum irq_domain_bus_token domain;
int index;
int trigger; /* ACPI_EDGE_SENSITIVE / ACPI_LEVEL_SENSITIVE */
int polarity; /* ACPI_ACTIVE_HIGH / ACPI_ACTIVE_LOW / ACPI_ACTIVE_BOTH */
};
static int gpiochip_find_match_label(struct gpio_chip *gc, void *data)
{
return gc->label && !strcmp(gc->label, data);
}
static int x86_acpi_irq_helper_get(const struct x86_acpi_irq_data *data)
{
struct irq_fwspec fwspec = { };
struct irq_domain *domain;
struct acpi_device *adev;
struct gpio_desc *gpiod;
struct gpio_chip *chip;
unsigned int irq_type;
acpi_handle handle;
acpi_status status;
int irq, ret;
switch (data->type) {
case X86_ACPI_IRQ_TYPE_APIC:
irq = acpi_register_gsi(NULL, data->index, data->trigger, data->polarity);
if (irq < 0)
pr_err("error %d getting APIC IRQ %d\n", irq, data->index);
return irq;
case X86_ACPI_IRQ_TYPE_GPIOINT:
/* Like acpi_dev_gpio_irq_get(), but without parsing ACPI resources */
chip = gpiochip_find(data->chip, gpiochip_find_match_label);
if (!chip) {
pr_err("error cannot find GPIO chip %s\n", data->chip);
return -ENODEV;
}
gpiod = gpiochip_get_desc(chip, data->index);
if (IS_ERR(gpiod)) {
ret = PTR_ERR(gpiod);
pr_err("error %d getting GPIO %s %d\n", ret, data->chip, data->index);
return ret;
}
irq = gpiod_to_irq(gpiod);
if (irq < 0) {
pr_err("error %d getting IRQ %s %d\n", irq, data->chip, data->index);
return irq;
}
irq_type = acpi_dev_get_irq_type(data->trigger, data->polarity);
if (irq_type != IRQ_TYPE_NONE && irq_type != irq_get_trigger_type(irq))
irq_set_irq_type(irq, irq_type);
return irq;
case X86_ACPI_IRQ_TYPE_PMIC:
status = acpi_get_handle(NULL, data->chip, &handle);
if (ACPI_FAILURE(status)) {
pr_err("error could not get %s handle\n", data->chip);
return -ENODEV;
}
adev = acpi_fetch_acpi_dev(handle);
if (!adev) {
pr_err("error could not get %s adev\n", data->chip);
return -ENODEV;
}
fwspec.fwnode = acpi_fwnode_handle(adev);
domain = irq_find_matching_fwspec(&fwspec, data->domain);
if (!domain) {
pr_err("error could not find IRQ domain for %s\n", data->chip);
return -ENODEV;
}
return irq_create_mapping(domain, data->index);
default:
return 0;
}
}
struct x86_i2c_client_info {
struct i2c_board_info board_info;
char *adapter_path;
struct x86_acpi_irq_data irq_data;
};
struct x86_serdev_info {
const char *ctrl_hid;
const char *ctrl_uid;
const char *ctrl_devname;
/*
* ATM the serdev core only supports of or ACPI matching; and sofar all
* Android x86 tablets DSDTs have usable serdev nodes, but sometimes
* under the wrong controller. So we just tie the existing serdev ACPI
* node to the right controller.
*/
const char *serdev_hid;
};
struct x86_dev_info {
char *invalid_aei_gpiochip;
const char * const *modules;
struct gpiod_lookup_table * const *gpiod_lookup_tables;
const struct x86_i2c_client_info *i2c_client_info;
const struct platform_device_info *pdev_info;
const struct x86_serdev_info *serdev_info;
int i2c_client_count;
int pdev_count;
int serdev_count;
int (*init)(void);
void (*exit)(void);
};
/* Generic / shared bq24190 settings */
static const char * const bq24190_suppliers[] = { "tusb1210-psy" };
static const struct property_entry bq24190_props[] = {
PROPERTY_ENTRY_STRING_ARRAY("supplied-from", bq24190_suppliers),
PROPERTY_ENTRY_BOOL("omit-battery-class"),
PROPERTY_ENTRY_BOOL("disable-reset"),
{ }
};
static const struct software_node bq24190_node = {
.properties = bq24190_props,
};
/* For enableing the bq24190 5V boost based on id-pin */
static struct regulator_consumer_supply intel_int3496_consumer = {
.supply = "vbus",
.dev_name = "intel-int3496",
};
static const struct regulator_init_data bq24190_vbus_init_data = {
.constraints = {
.name = "bq24190_vbus",
.valid_ops_mask = REGULATOR_CHANGE_STATUS,
},
.consumer_supplies = &intel_int3496_consumer,
.num_consumer_supplies = 1,
};
static struct bq24190_platform_data bq24190_pdata = {
.regulator_init_data = &bq24190_vbus_init_data,
};
static const char * const bq24190_modules[] __initconst = {
"intel_crystal_cove_charger", /* For the bq24190 IRQ */
"bq24190_charger", /* For the Vbus regulator for intel-int3496 */
NULL
};
/* Generic pdevs array and gpio-lookups for micro USB ID pin handling */
static const struct platform_device_info int3496_pdevs[] __initconst = {
{
/* For micro USB ID pin handling */
.name = "intel-int3496",
.id = PLATFORM_DEVID_NONE,
},
};
static struct gpiod_lookup_table int3496_gpo2_pin22_gpios = {
.dev_id = "intel-int3496",
.table = {
GPIO_LOOKUP("INT33FC:02", 22, "id", GPIO_ACTIVE_HIGH),
{ }
},
};
/* Asus ME176C tablets have an Android factory img with everything hardcoded */
static const char * const asus_me176c_accel_mount_matrix[] = {
"-1", "0", "0",
"0", "1", "0",
"0", "0", "1"
};
static const struct property_entry asus_me176c_accel_props[] = {
PROPERTY_ENTRY_STRING_ARRAY("mount-matrix", asus_me176c_accel_mount_matrix),
{ }
};
static const struct software_node asus_me176c_accel_node = {
.properties = asus_me176c_accel_props,
};
static const struct x86_i2c_client_info asus_me176c_i2c_clients[] __initconst = {
{
/* bq24190 battery charger */
.board_info = {
.type = "bq24190",
.addr = 0x6b,
.dev_name = "bq24190",
.swnode = &bq24190_node,
.platform_data = &bq24190_pdata,
},
.adapter_path = "\\_SB_.I2C1",
.irq_data = {
.type = X86_ACPI_IRQ_TYPE_PMIC,
.chip = "\\_SB_.I2C7.PMIC",
.domain = DOMAIN_BUS_WAKEUP,
.index = 0,
},
}, {
/* ug3105 battery monitor */
.board_info = {
.type = "ug3105",
.addr = 0x70,
.dev_name = "ug3105",
},
.adapter_path = "\\_SB_.I2C1",
}, {
/* ak09911 compass */
.board_info = {
.type = "ak09911",
.addr = 0x0c,
.dev_name = "ak09911",
},
.adapter_path = "\\_SB_.I2C5",
}, {
/* kxtj21009 accel */
.board_info = {
.type = "kxtj21009",
.addr = 0x0f,
.dev_name = "kxtj21009",
.swnode = &asus_me176c_accel_node,
},
.adapter_path = "\\_SB_.I2C5",
}, {
/* goodix touchscreen */
.board_info = {
.type = "GDIX1001:00",
.addr = 0x14,
.dev_name = "goodix_ts",
},
.adapter_path = "\\_SB_.I2C6",
.irq_data = {
.type = X86_ACPI_IRQ_TYPE_APIC,
.index = 0x45,
.trigger = ACPI_EDGE_SENSITIVE,
.polarity = ACPI_ACTIVE_LOW,
},
},
};
static const struct x86_serdev_info asus_me176c_serdevs[] __initconst = {
{
.ctrl_hid = "80860F0A",
.ctrl_uid = "2",
.ctrl_devname = "serial0",
.serdev_hid = "BCM2E3A",
},
};
static struct gpiod_lookup_table asus_me176c_goodix_gpios = {
.dev_id = "i2c-goodix_ts",
.table = {
GPIO_LOOKUP("INT33FC:00", 60, "reset", GPIO_ACTIVE_HIGH),
GPIO_LOOKUP("INT33FC:02", 28, "irq", GPIO_ACTIVE_HIGH),
{ }
},
};
static struct gpiod_lookup_table * const asus_me176c_gpios[] = {
&int3496_gpo2_pin22_gpios,
&asus_me176c_goodix_gpios,
NULL
};
static const struct x86_dev_info asus_me176c_info __initconst = {
.i2c_client_info = asus_me176c_i2c_clients,
.i2c_client_count = ARRAY_SIZE(asus_me176c_i2c_clients),
.pdev_info = int3496_pdevs,
.pdev_count = ARRAY_SIZE(int3496_pdevs),
.serdev_info = asus_me176c_serdevs,
.serdev_count = ARRAY_SIZE(asus_me176c_serdevs),
.gpiod_lookup_tables = asus_me176c_gpios,
.modules = bq24190_modules,
.invalid_aei_gpiochip = "INT33FC:02",
};
/* Asus TF103C tablets have an Android factory img with everything hardcoded */
static const char * const asus_tf103c_accel_mount_matrix[] = {
"0", "-1", "0",
"-1", "0", "0",
"0", "0", "1"
};
static const struct property_entry asus_tf103c_accel_props[] = {
PROPERTY_ENTRY_STRING_ARRAY("mount-matrix", asus_tf103c_accel_mount_matrix),
{ }
};
static const struct software_node asus_tf103c_accel_node = {
.properties = asus_tf103c_accel_props,
};
static const struct property_entry asus_tf103c_touchscreen_props[] = {
PROPERTY_ENTRY_STRING("compatible", "atmel,atmel_mxt_ts"),
{ }
};
static const struct software_node asus_tf103c_touchscreen_node = {
.properties = asus_tf103c_touchscreen_props,
};
static const struct x86_i2c_client_info asus_tf103c_i2c_clients[] __initconst = {
{
/* bq24190 battery charger */
.board_info = {
.type = "bq24190",
.addr = 0x6b,
.dev_name = "bq24190",
.swnode = &bq24190_node,
.platform_data = &bq24190_pdata,
},
.adapter_path = "\\_SB_.I2C1",
.irq_data = {
.type = X86_ACPI_IRQ_TYPE_PMIC,
.chip = "\\_SB_.I2C7.PMIC",
.domain = DOMAIN_BUS_WAKEUP,
.index = 0,
},
}, {
/* ug3105 battery monitor */
.board_info = {
.type = "ug3105",
.addr = 0x70,
.dev_name = "ug3105",
},
.adapter_path = "\\_SB_.I2C1",
}, {
/* ak09911 compass */
.board_info = {
.type = "ak09911",
.addr = 0x0c,
.dev_name = "ak09911",
},
.adapter_path = "\\_SB_.I2C5",
}, {
/* kxtj21009 accel */
.board_info = {
.type = "kxtj21009",
.addr = 0x0f,
.dev_name = "kxtj21009",
.swnode = &asus_tf103c_accel_node,
},
.adapter_path = "\\_SB_.I2C5",
}, {
/* atmel touchscreen */
.board_info = {
.type = "atmel_mxt_ts",
.addr = 0x4a,
.dev_name = "atmel_mxt_ts",
.swnode = &asus_tf103c_touchscreen_node,
},
.adapter_path = "\\_SB_.I2C6",
.irq_data = {
.type = X86_ACPI_IRQ_TYPE_GPIOINT,
.chip = "INT33FC:02",
.index = 28,
.trigger = ACPI_EDGE_SENSITIVE,
.polarity = ACPI_ACTIVE_LOW,
},
},
};
static struct gpiod_lookup_table * const asus_tf103c_gpios[] = {
&int3496_gpo2_pin22_gpios,
NULL
};
static const struct x86_dev_info asus_tf103c_info __initconst = {
.i2c_client_info = asus_tf103c_i2c_clients,
.i2c_client_count = ARRAY_SIZE(asus_tf103c_i2c_clients),
.pdev_info = int3496_pdevs,
.pdev_count = ARRAY_SIZE(int3496_pdevs),
.gpiod_lookup_tables = asus_tf103c_gpios,
.modules = bq24190_modules,
.invalid_aei_gpiochip = "INT33FC:02",
};
/*
* When booted with the BIOS set to Android mode the Chuwi Hi8 (CWI509) DSDT
* contains a whole bunch of bogus ACPI I2C devices and is missing entries
* for the touchscreen and the accelerometer.
*/
static const struct property_entry chuwi_hi8_gsl1680_props[] = {
PROPERTY_ENTRY_U32("touchscreen-size-x", 1665),
PROPERTY_ENTRY_U32("touchscreen-size-y", 1140),
PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
PROPERTY_ENTRY_BOOL("silead,home-button"),
PROPERTY_ENTRY_STRING("firmware-name", "gsl1680-chuwi-hi8.fw"),
{ }
};
static const struct software_node chuwi_hi8_gsl1680_node = {
.properties = chuwi_hi8_gsl1680_props,
};
static const char * const chuwi_hi8_mount_matrix[] = {
"1", "0", "0",
"0", "-1", "0",
"0", "0", "1"
};
static const struct property_entry chuwi_hi8_bma250e_props[] = {
PROPERTY_ENTRY_STRING_ARRAY("mount-matrix", chuwi_hi8_mount_matrix),
{ }
};
static const struct software_node chuwi_hi8_bma250e_node = {
.properties = chuwi_hi8_bma250e_props,
};
static const struct x86_i2c_client_info chuwi_hi8_i2c_clients[] __initconst = {
{
/* Silead touchscreen */
.board_info = {
.type = "gsl1680",
.addr = 0x40,
.swnode = &chuwi_hi8_gsl1680_node,
},
.adapter_path = "\\_SB_.I2C4",
.irq_data = {
.type = X86_ACPI_IRQ_TYPE_APIC,
.index = 0x44,
.trigger = ACPI_EDGE_SENSITIVE,
.polarity = ACPI_ACTIVE_HIGH,
},
}, {
/* BMA250E accelerometer */
.board_info = {
.type = "bma250e",
.addr = 0x18,
.swnode = &chuwi_hi8_bma250e_node,
},
.adapter_path = "\\_SB_.I2C3",
.irq_data = {
.type = X86_ACPI_IRQ_TYPE_GPIOINT,
.chip = "INT33FC:02",
.index = 23,
.trigger = ACPI_LEVEL_SENSITIVE,
.polarity = ACPI_ACTIVE_HIGH,
},
},
};
static const struct x86_dev_info chuwi_hi8_info __initconst = {
.i2c_client_info = chuwi_hi8_i2c_clients,
.i2c_client_count = ARRAY_SIZE(chuwi_hi8_i2c_clients),
};
#define CZC_EC_EXTRA_PORT 0x68
#define CZC_EC_ANDROID_KEYS 0x63
static int __init czc_p10t_init(void)
{
/*
* The device boots up in "Windows 7" mode, when the home button sends a
* Windows specific key sequence (Left Meta + D) and the second button
* sends an unknown one while also toggling the Radio Kill Switch.
* This is a surprising behavior when the second button is labeled "Back".
*
* The vendor-supplied Android-x86 build switches the device to a "Android"
* mode by writing value 0x63 to the I/O port 0x68. This just seems to just
* set bit 6 on address 0x96 in the EC region; switching the bit directly
* seems to achieve the same result. It uses a "p10t_switcher" to do the
* job. It doesn't seem to be able to do anything else, and no other use
* of the port 0x68 is known.
*
* In the Android mode, the home button sends just a single scancode,
* which can be handled in Linux userspace more reasonably and the back
* button only sends a scancode without toggling the kill switch.
* The scancode can then be mapped either to Back or RF Kill functionality
* in userspace, depending on how the button is labeled on that particular
* model.
*/
outb(CZC_EC_ANDROID_KEYS, CZC_EC_EXTRA_PORT);
return 0;
}
static const struct x86_dev_info czc_p10t __initconst = {
.init = czc_p10t_init,
};
/*
* Whitelabel (sold as various brands) TM800A550L tablets.
* These tablet's DSDT contains a whole bunch of bogus ACPI I2C devices
* (removed through acpi_quirk_skip_i2c_client_enumeration()) and
* the touchscreen fwnode has the wrong GPIOs.
*/
static const char * const whitelabel_tm800a550l_accel_mount_matrix[] = {
"-1", "0", "0",
"0", "1", "0",
"0", "0", "1"
};
static const struct property_entry whitelabel_tm800a550l_accel_props[] = {
PROPERTY_ENTRY_STRING_ARRAY("mount-matrix", whitelabel_tm800a550l_accel_mount_matrix),
{ }
};
static const struct software_node whitelabel_tm800a550l_accel_node = {
.properties = whitelabel_tm800a550l_accel_props,
};
static const struct property_entry whitelabel_tm800a550l_goodix_props[] = {
PROPERTY_ENTRY_STRING("firmware-name", "gt912-tm800a550l.fw"),
PROPERTY_ENTRY_STRING("goodix,config-name", "gt912-tm800a550l.cfg"),
PROPERTY_ENTRY_U32("goodix,main-clk", 54),
{ }
};
static const struct software_node whitelabel_tm800a550l_goodix_node = {
.properties = whitelabel_tm800a550l_goodix_props,
};
static const struct x86_i2c_client_info whitelabel_tm800a550l_i2c_clients[] __initconst = {
{
/* goodix touchscreen */
.board_info = {
.type = "GDIX1001:00",
.addr = 0x14,
.dev_name = "goodix_ts",
.swnode = &whitelabel_tm800a550l_goodix_node,
},
.adapter_path = "\\_SB_.I2C2",
.irq_data = {
.type = X86_ACPI_IRQ_TYPE_APIC,
.index = 0x44,
.trigger = ACPI_EDGE_SENSITIVE,
.polarity = ACPI_ACTIVE_HIGH,
},
}, {
/* kxcj91008 accel */
.board_info = {
.type = "kxcj91008",
.addr = 0x0f,
.dev_name = "kxcj91008",
.swnode = &whitelabel_tm800a550l_accel_node,
},
.adapter_path = "\\_SB_.I2C3",
},
};
static struct gpiod_lookup_table whitelabel_tm800a550l_goodix_gpios = {
.dev_id = "i2c-goodix_ts",
.table = {
GPIO_LOOKUP("INT33FC:01", 26, "reset", GPIO_ACTIVE_HIGH),
GPIO_LOOKUP("INT33FC:02", 3, "irq", GPIO_ACTIVE_HIGH),
{ }
},
};
static struct gpiod_lookup_table * const whitelabel_tm800a550l_gpios[] = {
&whitelabel_tm800a550l_goodix_gpios,
NULL
};
static const struct x86_dev_info whitelabel_tm800a550l_info __initconst = {
.i2c_client_info = whitelabel_tm800a550l_i2c_clients,
.i2c_client_count = ARRAY_SIZE(whitelabel_tm800a550l_i2c_clients),
.gpiod_lookup_tables = whitelabel_tm800a550l_gpios,
};
/*
* If the EFI bootloader is not Xiaomi's own signed Android loader, then the
* Xiaomi Mi Pad 2 X86 tablet sets OSID in the DSDT to 1 (Windows), causing
* a bunch of devices to be hidden.
*
* This takes care of instantiating the hidden devices manually.
*/
static const char * const bq27520_suppliers[] = { "bq25890-charger" };
static const struct property_entry bq27520_props[] = {
PROPERTY_ENTRY_STRING_ARRAY("supplied-from", bq27520_suppliers),
{ }
};
static const struct software_node bq27520_node = {
.properties = bq27520_props,
};
static const struct x86_i2c_client_info xiaomi_mipad2_i2c_clients[] __initconst = {
{
/* BQ27520 fuel-gauge */
.board_info = {
.type = "bq27520",
.addr = 0x55,
.dev_name = "bq27520",
.swnode = &bq27520_node,
},
.adapter_path = "\\_SB_.PCI0.I2C1",
}, {
/* KTD2026 RGB notification LED controller */
.board_info = {
.type = "ktd2026",
.addr = 0x30,
.dev_name = "ktd2026",
},
.adapter_path = "\\_SB_.PCI0.I2C3",
},
};
static const struct x86_dev_info xiaomi_mipad2_info __initconst = {
.i2c_client_info = xiaomi_mipad2_i2c_clients,
.i2c_client_count = ARRAY_SIZE(xiaomi_mipad2_i2c_clients),
};
static const struct dmi_system_id x86_android_tablet_ids[] __initconst = {
{
/* Asus MeMO Pad 7 ME176C */
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "ME176C"),
},
.driver_data = (void *)&asus_me176c_info,
},
{
/* Asus TF103C */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"),
},
.driver_data = (void *)&asus_tf103c_info,
},
{
/* Chuwi Hi8 (CWI509) */
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Hampoo"),
DMI_MATCH(DMI_BOARD_NAME, "BYT-PA03C"),
DMI_MATCH(DMI_SYS_VENDOR, "ilife"),
DMI_MATCH(DMI_PRODUCT_NAME, "S806"),
},
.driver_data = (void *)&chuwi_hi8_info,
},
{
/* CZC P10T */
.ident = "CZC ODEON TPC-10 (\"P10T\")",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "CZC"),
DMI_MATCH(DMI_PRODUCT_NAME, "ODEON*TPC-10"),
},
.driver_data = (void *)&czc_p10t,
},
{
/* A variant of CZC P10T */
.ident = "ViewSonic ViewPad 10",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ViewSonic"),
DMI_MATCH(DMI_PRODUCT_NAME, "VPAD10"),
},
.driver_data = (void *)&czc_p10t,
},
{
/* Whitelabel (sold as various brands) TM800A550L */
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
/* Above strings are too generic, also match on BIOS version */
DMI_MATCH(DMI_BIOS_VERSION, "ZY-8-BI-PX4S70VTR400-X423B-005-D"),
},
.driver_data = (void *)&whitelabel_tm800a550l_info,
},
{
/* Xiaomi Mi Pad 2 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),
DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"),
},
.driver_data = (void *)&xiaomi_mipad2_info,
},
{ }
};
MODULE_DEVICE_TABLE(dmi, x86_android_tablet_ids);
static int i2c_client_count;
static int pdev_count;
static int serdev_count;
static struct i2c_client **i2c_clients;
static struct platform_device **pdevs;
static struct serdev_device **serdevs;
static struct gpiod_lookup_table * const *gpiod_lookup_tables;
static void (*exit_handler)(void);
static __init int x86_instantiate_i2c_client(const struct x86_dev_info *dev_info,
int idx)
{
const struct x86_i2c_client_info *client_info = &dev_info->i2c_client_info[idx];
struct i2c_board_info board_info = client_info->board_info;
struct i2c_adapter *adap;
acpi_handle handle;
acpi_status status;
board_info.irq = x86_acpi_irq_helper_get(&client_info->irq_data);
if (board_info.irq < 0)
return board_info.irq;
status = acpi_get_handle(NULL, client_info->adapter_path, &handle);
if (ACPI_FAILURE(status)) {
pr_err("Error could not get %s handle\n", client_info->adapter_path);
return -ENODEV;
}
adap = i2c_acpi_find_adapter_by_handle(handle);
if (!adap) {
pr_err("error could not get %s adapter\n", client_info->adapter_path);
return -ENODEV;
}
i2c_clients[idx] = i2c_new_client_device(adap, &board_info);
put_device(&adap->dev);
if (IS_ERR(i2c_clients[idx]))
return dev_err_probe(&adap->dev, PTR_ERR(i2c_clients[idx]),
"creating I2C-client %d\n", idx);
return 0;
}
static __init int x86_instantiate_serdev(const struct x86_serdev_info *info, int idx)
{
struct acpi_device *ctrl_adev, *serdev_adev;
struct serdev_device *serdev;
struct device *ctrl_dev;
int ret = -ENODEV;
ctrl_adev = acpi_dev_get_first_match_dev(info->ctrl_hid, info->ctrl_uid, -1);
if (!ctrl_adev) {
pr_err("error could not get %s/%s ctrl adev\n",
info->ctrl_hid, info->ctrl_uid);
return -ENODEV;
}
serdev_adev = acpi_dev_get_first_match_dev(info->serdev_hid, NULL, -1);
if (!serdev_adev) {
pr_err("error could not get %s serdev adev\n", info->serdev_hid);
goto put_ctrl_adev;
}
/* get_first_physical_node() returns a weak ref, no need to put() it */
ctrl_dev = acpi_get_first_physical_node(ctrl_adev);
if (!ctrl_dev) {
pr_err("error could not get %s/%s ctrl physical dev\n",
info->ctrl_hid, info->ctrl_uid);
goto put_serdev_adev;
}
/* ctrl_dev now points to the controller's parent, get the controller */
ctrl_dev = device_find_child_by_name(ctrl_dev, info->ctrl_devname);
if (!ctrl_dev) {
pr_err("error could not get %s/%s %s ctrl dev\n",
info->ctrl_hid, info->ctrl_uid, info->ctrl_devname);
goto put_serdev_adev;
}
serdev = serdev_device_alloc(to_serdev_controller(ctrl_dev));
if (!serdev) {
ret = -ENOMEM;
goto put_serdev_adev;
}
ACPI_COMPANION_SET(&serdev->dev, serdev_adev);
acpi_device_set_enumerated(serdev_adev);
ret = serdev_device_add(serdev);
if (ret) {
dev_err(&serdev->dev, "error %d adding serdev\n", ret);
serdev_device_put(serdev);
goto put_serdev_adev;
}
serdevs[idx] = serdev;
put_serdev_adev:
acpi_dev_put(serdev_adev);
put_ctrl_adev:
acpi_dev_put(ctrl_adev);
return ret;
}
static void x86_android_tablet_cleanup(void)
{
int i;
for (i = 0; i < serdev_count; i++) {
if (serdevs[i])
serdev_device_remove(serdevs[i]);
}
kfree(serdevs);
for (i = 0; i < pdev_count; i++)
platform_device_unregister(pdevs[i]);
kfree(pdevs);
for (i = 0; i < i2c_client_count; i++)
i2c_unregister_device(i2c_clients[i]);
kfree(i2c_clients);
if (exit_handler)
exit_handler();
for (i = 0; gpiod_lookup_tables && gpiod_lookup_tables[i]; i++)
gpiod_remove_lookup_table(gpiod_lookup_tables[i]);
}
static __init int x86_android_tablet_init(void)
{
const struct x86_dev_info *dev_info;
const struct dmi_system_id *id;
struct gpio_chip *chip;
int i, ret = 0;
id = dmi_first_match(x86_android_tablet_ids);
if (!id)
return -ENODEV;
dev_info = id->driver_data;
/*
* The broken DSDTs on these devices often also include broken
* _AEI (ACPI Event Interrupt) handlers, disable these.
*/
if (dev_info->invalid_aei_gpiochip) {
chip = gpiochip_find(dev_info->invalid_aei_gpiochip,
gpiochip_find_match_label);
if (!chip) {
pr_err("error cannot find GPIO chip %s\n", dev_info->invalid_aei_gpiochip);
return -ENODEV;
}
acpi_gpiochip_free_interrupts(chip);
}
/*
* Since this runs from module_init() it cannot use -EPROBE_DEFER,
* instead pre-load any modules which are listed as requirements.
*/
for (i = 0; dev_info->modules && dev_info->modules[i]; i++)
request_module(dev_info->modules[i]);
gpiod_lookup_tables = dev_info->gpiod_lookup_tables;
for (i = 0; gpiod_lookup_tables && gpiod_lookup_tables[i]; i++)
gpiod_add_lookup_table(gpiod_lookup_tables[i]);
if (dev_info->init) {
ret = dev_info->init();
if (ret < 0) {
x86_android_tablet_cleanup();
return ret;
}
exit_handler = dev_info->exit;
}
i2c_clients = kcalloc(dev_info->i2c_client_count, sizeof(*i2c_clients), GFP_KERNEL);
if (!i2c_clients) {
x86_android_tablet_cleanup();
return -ENOMEM;
}
i2c_client_count = dev_info->i2c_client_count;
for (i = 0; i < i2c_client_count; i++) {
ret = x86_instantiate_i2c_client(dev_info, i);
if (ret < 0) {
x86_android_tablet_cleanup();
return ret;
}
}
pdevs = kcalloc(dev_info->pdev_count, sizeof(*pdevs), GFP_KERNEL);
if (!pdevs) {
x86_android_tablet_cleanup();
return -ENOMEM;
}
pdev_count = dev_info->pdev_count;
for (i = 0; i < pdev_count; i++) {
pdevs[i] = platform_device_register_full(&dev_info->pdev_info[i]);
if (IS_ERR(pdevs[i])) {
x86_android_tablet_cleanup();
return PTR_ERR(pdevs[i]);
}
}
serdevs = kcalloc(dev_info->serdev_count, sizeof(*serdevs), GFP_KERNEL);
if (!serdevs) {
x86_android_tablet_cleanup();
return -ENOMEM;
}
serdev_count = dev_info->serdev_count;
for (i = 0; i < serdev_count; i++) {
ret = x86_instantiate_serdev(&dev_info->serdev_info[i], i);
if (ret < 0) {
x86_android_tablet_cleanup();
return ret;
}
}
return 0;
}
module_init(x86_android_tablet_init);
module_exit(x86_android_tablet_cleanup);
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_DESCRIPTION("X86 Android tablets DSDT fixups driver");
MODULE_LICENSE("GPL");