mirror of https://gitee.com/openkylin/linux.git
634 lines
16 KiB
C
634 lines
16 KiB
C
/*
|
|
* Gmux driver for Apple laptops
|
|
*
|
|
* Copyright (C) Canonical Ltd. <seth.forshee@canonical.com>
|
|
* Copyright (C) 2010-2012 Andreas Heider <andreas@meetr.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/backlight.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/pnp.h>
|
|
#include <linux/apple_bl.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/vga_switcheroo.h>
|
|
#include <acpi/video.h>
|
|
#include <asm/io.h>
|
|
|
|
struct apple_gmux_data {
|
|
unsigned long iostart;
|
|
unsigned long iolen;
|
|
bool indexed;
|
|
struct mutex index_lock;
|
|
|
|
struct backlight_device *bdev;
|
|
|
|
/* switcheroo data */
|
|
acpi_handle dhandle;
|
|
int gpe;
|
|
enum vga_switcheroo_client_id resume_client_id;
|
|
enum vga_switcheroo_state power_state;
|
|
struct completion powerchange_done;
|
|
};
|
|
|
|
static struct apple_gmux_data *apple_gmux_data;
|
|
|
|
/*
|
|
* gmux port offsets. Many of these are not yet used, but may be in the
|
|
* future, and it's useful to have them documented here anyhow.
|
|
*/
|
|
#define GMUX_PORT_VERSION_MAJOR 0x04
|
|
#define GMUX_PORT_VERSION_MINOR 0x05
|
|
#define GMUX_PORT_VERSION_RELEASE 0x06
|
|
#define GMUX_PORT_SWITCH_DISPLAY 0x10
|
|
#define GMUX_PORT_SWITCH_GET_DISPLAY 0x11
|
|
#define GMUX_PORT_INTERRUPT_ENABLE 0x14
|
|
#define GMUX_PORT_INTERRUPT_STATUS 0x16
|
|
#define GMUX_PORT_SWITCH_DDC 0x28
|
|
#define GMUX_PORT_SWITCH_EXTERNAL 0x40
|
|
#define GMUX_PORT_SWITCH_GET_EXTERNAL 0x41
|
|
#define GMUX_PORT_DISCRETE_POWER 0x50
|
|
#define GMUX_PORT_MAX_BRIGHTNESS 0x70
|
|
#define GMUX_PORT_BRIGHTNESS 0x74
|
|
#define GMUX_PORT_VALUE 0xc2
|
|
#define GMUX_PORT_READ 0xd0
|
|
#define GMUX_PORT_WRITE 0xd4
|
|
|
|
#define GMUX_MIN_IO_LEN (GMUX_PORT_BRIGHTNESS + 4)
|
|
|
|
#define GMUX_INTERRUPT_ENABLE 0xff
|
|
#define GMUX_INTERRUPT_DISABLE 0x00
|
|
|
|
#define GMUX_INTERRUPT_STATUS_ACTIVE 0
|
|
#define GMUX_INTERRUPT_STATUS_DISPLAY (1 << 0)
|
|
#define GMUX_INTERRUPT_STATUS_POWER (1 << 2)
|
|
#define GMUX_INTERRUPT_STATUS_HOTPLUG (1 << 3)
|
|
|
|
#define GMUX_BRIGHTNESS_MASK 0x00ffffff
|
|
#define GMUX_MAX_BRIGHTNESS GMUX_BRIGHTNESS_MASK
|
|
|
|
static u8 gmux_pio_read8(struct apple_gmux_data *gmux_data, int port)
|
|
{
|
|
return inb(gmux_data->iostart + port);
|
|
}
|
|
|
|
static void gmux_pio_write8(struct apple_gmux_data *gmux_data, int port,
|
|
u8 val)
|
|
{
|
|
outb(val, gmux_data->iostart + port);
|
|
}
|
|
|
|
static u32 gmux_pio_read32(struct apple_gmux_data *gmux_data, int port)
|
|
{
|
|
return inl(gmux_data->iostart + port);
|
|
}
|
|
|
|
static void gmux_pio_write32(struct apple_gmux_data *gmux_data, int port,
|
|
u32 val)
|
|
{
|
|
int i;
|
|
u8 tmpval;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
tmpval = (val >> (i * 8)) & 0xff;
|
|
outb(tmpval, gmux_data->iostart + port + i);
|
|
}
|
|
}
|
|
|
|
static int gmux_index_wait_ready(struct apple_gmux_data *gmux_data)
|
|
{
|
|
int i = 200;
|
|
u8 gwr = inb(gmux_data->iostart + GMUX_PORT_WRITE);
|
|
|
|
while (i && (gwr & 0x01)) {
|
|
inb(gmux_data->iostart + GMUX_PORT_READ);
|
|
gwr = inb(gmux_data->iostart + GMUX_PORT_WRITE);
|
|
udelay(100);
|
|
i--;
|
|
}
|
|
|
|
return !!i;
|
|
}
|
|
|
|
static int gmux_index_wait_complete(struct apple_gmux_data *gmux_data)
|
|
{
|
|
int i = 200;
|
|
u8 gwr = inb(gmux_data->iostart + GMUX_PORT_WRITE);
|
|
|
|
while (i && !(gwr & 0x01)) {
|
|
gwr = inb(gmux_data->iostart + GMUX_PORT_WRITE);
|
|
udelay(100);
|
|
i--;
|
|
}
|
|
|
|
if (gwr & 0x01)
|
|
inb(gmux_data->iostart + GMUX_PORT_READ);
|
|
|
|
return !!i;
|
|
}
|
|
|
|
static u8 gmux_index_read8(struct apple_gmux_data *gmux_data, int port)
|
|
{
|
|
u8 val;
|
|
|
|
mutex_lock(&gmux_data->index_lock);
|
|
gmux_index_wait_ready(gmux_data);
|
|
outb((port & 0xff), gmux_data->iostart + GMUX_PORT_READ);
|
|
gmux_index_wait_complete(gmux_data);
|
|
val = inb(gmux_data->iostart + GMUX_PORT_VALUE);
|
|
mutex_unlock(&gmux_data->index_lock);
|
|
|
|
return val;
|
|
}
|
|
|
|
static void gmux_index_write8(struct apple_gmux_data *gmux_data, int port,
|
|
u8 val)
|
|
{
|
|
mutex_lock(&gmux_data->index_lock);
|
|
outb(val, gmux_data->iostart + GMUX_PORT_VALUE);
|
|
gmux_index_wait_ready(gmux_data);
|
|
outb(port & 0xff, gmux_data->iostart + GMUX_PORT_WRITE);
|
|
gmux_index_wait_complete(gmux_data);
|
|
mutex_unlock(&gmux_data->index_lock);
|
|
}
|
|
|
|
static u32 gmux_index_read32(struct apple_gmux_data *gmux_data, int port)
|
|
{
|
|
u32 val;
|
|
|
|
mutex_lock(&gmux_data->index_lock);
|
|
gmux_index_wait_ready(gmux_data);
|
|
outb((port & 0xff), gmux_data->iostart + GMUX_PORT_READ);
|
|
gmux_index_wait_complete(gmux_data);
|
|
val = inl(gmux_data->iostart + GMUX_PORT_VALUE);
|
|
mutex_unlock(&gmux_data->index_lock);
|
|
|
|
return val;
|
|
}
|
|
|
|
static void gmux_index_write32(struct apple_gmux_data *gmux_data, int port,
|
|
u32 val)
|
|
{
|
|
int i;
|
|
u8 tmpval;
|
|
|
|
mutex_lock(&gmux_data->index_lock);
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
tmpval = (val >> (i * 8)) & 0xff;
|
|
outb(tmpval, gmux_data->iostart + GMUX_PORT_VALUE + i);
|
|
}
|
|
|
|
gmux_index_wait_ready(gmux_data);
|
|
outb(port & 0xff, gmux_data->iostart + GMUX_PORT_WRITE);
|
|
gmux_index_wait_complete(gmux_data);
|
|
mutex_unlock(&gmux_data->index_lock);
|
|
}
|
|
|
|
static u8 gmux_read8(struct apple_gmux_data *gmux_data, int port)
|
|
{
|
|
if (gmux_data->indexed)
|
|
return gmux_index_read8(gmux_data, port);
|
|
else
|
|
return gmux_pio_read8(gmux_data, port);
|
|
}
|
|
|
|
static void gmux_write8(struct apple_gmux_data *gmux_data, int port, u8 val)
|
|
{
|
|
if (gmux_data->indexed)
|
|
gmux_index_write8(gmux_data, port, val);
|
|
else
|
|
gmux_pio_write8(gmux_data, port, val);
|
|
}
|
|
|
|
static u32 gmux_read32(struct apple_gmux_data *gmux_data, int port)
|
|
{
|
|
if (gmux_data->indexed)
|
|
return gmux_index_read32(gmux_data, port);
|
|
else
|
|
return gmux_pio_read32(gmux_data, port);
|
|
}
|
|
|
|
static void gmux_write32(struct apple_gmux_data *gmux_data, int port,
|
|
u32 val)
|
|
{
|
|
if (gmux_data->indexed)
|
|
gmux_index_write32(gmux_data, port, val);
|
|
else
|
|
gmux_pio_write32(gmux_data, port, val);
|
|
}
|
|
|
|
static bool gmux_is_indexed(struct apple_gmux_data *gmux_data)
|
|
{
|
|
u16 val;
|
|
|
|
outb(0xaa, gmux_data->iostart + 0xcc);
|
|
outb(0x55, gmux_data->iostart + 0xcd);
|
|
outb(0x00, gmux_data->iostart + 0xce);
|
|
|
|
val = inb(gmux_data->iostart + 0xcc) |
|
|
(inb(gmux_data->iostart + 0xcd) << 8);
|
|
|
|
if (val == 0x55aa)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static int gmux_get_brightness(struct backlight_device *bd)
|
|
{
|
|
struct apple_gmux_data *gmux_data = bl_get_data(bd);
|
|
return gmux_read32(gmux_data, GMUX_PORT_BRIGHTNESS) &
|
|
GMUX_BRIGHTNESS_MASK;
|
|
}
|
|
|
|
static int gmux_update_status(struct backlight_device *bd)
|
|
{
|
|
struct apple_gmux_data *gmux_data = bl_get_data(bd);
|
|
u32 brightness = bd->props.brightness;
|
|
|
|
if (bd->props.state & BL_CORE_SUSPENDED)
|
|
return 0;
|
|
|
|
gmux_write32(gmux_data, GMUX_PORT_BRIGHTNESS, brightness);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct backlight_ops gmux_bl_ops = {
|
|
.options = BL_CORE_SUSPENDRESUME,
|
|
.get_brightness = gmux_get_brightness,
|
|
.update_status = gmux_update_status,
|
|
};
|
|
|
|
static int gmux_switchto(enum vga_switcheroo_client_id id)
|
|
{
|
|
if (id == VGA_SWITCHEROO_IGD) {
|
|
gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_DDC, 1);
|
|
gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_DISPLAY, 2);
|
|
gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_EXTERNAL, 2);
|
|
} else {
|
|
gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_DDC, 2);
|
|
gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_DISPLAY, 3);
|
|
gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_EXTERNAL, 3);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gmux_set_discrete_state(struct apple_gmux_data *gmux_data,
|
|
enum vga_switcheroo_state state)
|
|
{
|
|
INIT_COMPLETION(gmux_data->powerchange_done);
|
|
|
|
if (state == VGA_SWITCHEROO_ON) {
|
|
gmux_write8(gmux_data, GMUX_PORT_DISCRETE_POWER, 1);
|
|
gmux_write8(gmux_data, GMUX_PORT_DISCRETE_POWER, 3);
|
|
pr_debug("Discrete card powered up\n");
|
|
} else {
|
|
gmux_write8(gmux_data, GMUX_PORT_DISCRETE_POWER, 1);
|
|
gmux_write8(gmux_data, GMUX_PORT_DISCRETE_POWER, 0);
|
|
pr_debug("Discrete card powered down\n");
|
|
}
|
|
|
|
gmux_data->power_state = state;
|
|
|
|
if (gmux_data->gpe >= 0 &&
|
|
!wait_for_completion_interruptible_timeout(&gmux_data->powerchange_done,
|
|
msecs_to_jiffies(200)))
|
|
pr_warn("Timeout waiting for gmux switch to complete\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gmux_set_power_state(enum vga_switcheroo_client_id id,
|
|
enum vga_switcheroo_state state)
|
|
{
|
|
if (id == VGA_SWITCHEROO_IGD)
|
|
return 0;
|
|
|
|
return gmux_set_discrete_state(apple_gmux_data, state);
|
|
}
|
|
|
|
static int gmux_get_client_id(struct pci_dev *pdev)
|
|
{
|
|
/*
|
|
* Early Macbook Pros with switchable graphics use nvidia
|
|
* integrated graphics. Hardcode that the 9400M is integrated.
|
|
*/
|
|
if (pdev->vendor == PCI_VENDOR_ID_INTEL)
|
|
return VGA_SWITCHEROO_IGD;
|
|
else if (pdev->vendor == PCI_VENDOR_ID_NVIDIA &&
|
|
pdev->device == 0x0863)
|
|
return VGA_SWITCHEROO_IGD;
|
|
else
|
|
return VGA_SWITCHEROO_DIS;
|
|
}
|
|
|
|
static enum vga_switcheroo_client_id
|
|
gmux_active_client(struct apple_gmux_data *gmux_data)
|
|
{
|
|
if (gmux_read8(gmux_data, GMUX_PORT_SWITCH_DISPLAY) == 2)
|
|
return VGA_SWITCHEROO_IGD;
|
|
|
|
return VGA_SWITCHEROO_DIS;
|
|
}
|
|
|
|
static struct vga_switcheroo_handler gmux_handler = {
|
|
.switchto = gmux_switchto,
|
|
.power_state = gmux_set_power_state,
|
|
.get_client_id = gmux_get_client_id,
|
|
};
|
|
|
|
static inline void gmux_disable_interrupts(struct apple_gmux_data *gmux_data)
|
|
{
|
|
gmux_write8(gmux_data, GMUX_PORT_INTERRUPT_ENABLE,
|
|
GMUX_INTERRUPT_DISABLE);
|
|
}
|
|
|
|
static inline void gmux_enable_interrupts(struct apple_gmux_data *gmux_data)
|
|
{
|
|
gmux_write8(gmux_data, GMUX_PORT_INTERRUPT_ENABLE,
|
|
GMUX_INTERRUPT_ENABLE);
|
|
}
|
|
|
|
static inline u8 gmux_interrupt_get_status(struct apple_gmux_data *gmux_data)
|
|
{
|
|
return gmux_read8(gmux_data, GMUX_PORT_INTERRUPT_STATUS);
|
|
}
|
|
|
|
static void gmux_clear_interrupts(struct apple_gmux_data *gmux_data)
|
|
{
|
|
u8 status;
|
|
|
|
/* to clear interrupts write back current status */
|
|
status = gmux_interrupt_get_status(gmux_data);
|
|
gmux_write8(gmux_data, GMUX_PORT_INTERRUPT_STATUS, status);
|
|
}
|
|
|
|
static void gmux_notify_handler(acpi_handle device, u32 value, void *context)
|
|
{
|
|
u8 status;
|
|
struct pnp_dev *pnp = (struct pnp_dev *)context;
|
|
struct apple_gmux_data *gmux_data = pnp_get_drvdata(pnp);
|
|
|
|
status = gmux_interrupt_get_status(gmux_data);
|
|
gmux_disable_interrupts(gmux_data);
|
|
pr_debug("Notify handler called: status %d\n", status);
|
|
|
|
gmux_clear_interrupts(gmux_data);
|
|
gmux_enable_interrupts(gmux_data);
|
|
|
|
if (status & GMUX_INTERRUPT_STATUS_POWER)
|
|
complete(&gmux_data->powerchange_done);
|
|
}
|
|
|
|
static int gmux_suspend(struct pnp_dev *pnp, pm_message_t state)
|
|
{
|
|
struct apple_gmux_data *gmux_data = pnp_get_drvdata(pnp);
|
|
gmux_data->resume_client_id = gmux_active_client(gmux_data);
|
|
gmux_disable_interrupts(gmux_data);
|
|
return 0;
|
|
}
|
|
|
|
static int gmux_resume(struct pnp_dev *pnp)
|
|
{
|
|
struct apple_gmux_data *gmux_data = pnp_get_drvdata(pnp);
|
|
gmux_enable_interrupts(gmux_data);
|
|
gmux_switchto(gmux_data->resume_client_id);
|
|
if (gmux_data->power_state == VGA_SWITCHEROO_OFF)
|
|
gmux_set_discrete_state(gmux_data, gmux_data->power_state);
|
|
return 0;
|
|
}
|
|
|
|
static int gmux_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
|
|
{
|
|
struct apple_gmux_data *gmux_data;
|
|
struct resource *res;
|
|
struct backlight_properties props;
|
|
struct backlight_device *bdev;
|
|
u8 ver_major, ver_minor, ver_release;
|
|
int ret = -ENXIO;
|
|
acpi_status status;
|
|
unsigned long long gpe;
|
|
|
|
if (apple_gmux_data)
|
|
return -EBUSY;
|
|
|
|
gmux_data = kzalloc(sizeof(*gmux_data), GFP_KERNEL);
|
|
if (!gmux_data)
|
|
return -ENOMEM;
|
|
pnp_set_drvdata(pnp, gmux_data);
|
|
|
|
res = pnp_get_resource(pnp, IORESOURCE_IO, 0);
|
|
if (!res) {
|
|
pr_err("Failed to find gmux I/O resource\n");
|
|
goto err_free;
|
|
}
|
|
|
|
gmux_data->iostart = res->start;
|
|
gmux_data->iolen = res->end - res->start;
|
|
|
|
if (gmux_data->iolen < GMUX_MIN_IO_LEN) {
|
|
pr_err("gmux I/O region too small (%lu < %u)\n",
|
|
gmux_data->iolen, GMUX_MIN_IO_LEN);
|
|
goto err_free;
|
|
}
|
|
|
|
if (!request_region(gmux_data->iostart, gmux_data->iolen,
|
|
"Apple gmux")) {
|
|
pr_err("gmux I/O already in use\n");
|
|
goto err_free;
|
|
}
|
|
|
|
/*
|
|
* Invalid version information may indicate either that the gmux
|
|
* device isn't present or that it's a new one that uses indexed
|
|
* io
|
|
*/
|
|
|
|
ver_major = gmux_read8(gmux_data, GMUX_PORT_VERSION_MAJOR);
|
|
ver_minor = gmux_read8(gmux_data, GMUX_PORT_VERSION_MINOR);
|
|
ver_release = gmux_read8(gmux_data, GMUX_PORT_VERSION_RELEASE);
|
|
if (ver_major == 0xff && ver_minor == 0xff && ver_release == 0xff) {
|
|
if (gmux_is_indexed(gmux_data)) {
|
|
u32 version;
|
|
mutex_init(&gmux_data->index_lock);
|
|
gmux_data->indexed = true;
|
|
version = gmux_read32(gmux_data,
|
|
GMUX_PORT_VERSION_MAJOR);
|
|
ver_major = (version >> 24) & 0xff;
|
|
ver_minor = (version >> 16) & 0xff;
|
|
ver_release = (version >> 8) & 0xff;
|
|
} else {
|
|
pr_info("gmux device not present\n");
|
|
ret = -ENODEV;
|
|
goto err_release;
|
|
}
|
|
}
|
|
pr_info("Found gmux version %d.%d.%d [%s]\n", ver_major, ver_minor,
|
|
ver_release, (gmux_data->indexed ? "indexed" : "classic"));
|
|
|
|
memset(&props, 0, sizeof(props));
|
|
props.type = BACKLIGHT_PLATFORM;
|
|
props.max_brightness = gmux_read32(gmux_data, GMUX_PORT_MAX_BRIGHTNESS);
|
|
|
|
/*
|
|
* Currently it's assumed that the maximum brightness is less than
|
|
* 2^24 for compatibility with old gmux versions. Cap the max
|
|
* brightness at this value, but print a warning if the hardware
|
|
* reports something higher so that it can be fixed.
|
|
*/
|
|
if (WARN_ON(props.max_brightness > GMUX_MAX_BRIGHTNESS))
|
|
props.max_brightness = GMUX_MAX_BRIGHTNESS;
|
|
|
|
bdev = backlight_device_register("gmux_backlight", &pnp->dev,
|
|
gmux_data, &gmux_bl_ops, &props);
|
|
if (IS_ERR(bdev)) {
|
|
ret = PTR_ERR(bdev);
|
|
goto err_release;
|
|
}
|
|
|
|
gmux_data->bdev = bdev;
|
|
bdev->props.brightness = gmux_get_brightness(bdev);
|
|
backlight_update_status(bdev);
|
|
|
|
/*
|
|
* The backlight situation on Macs is complicated. If the gmux is
|
|
* present it's the best choice, because it always works for
|
|
* backlight control and supports more levels than other options.
|
|
* Disable the other backlight choices.
|
|
*/
|
|
acpi_video_dmi_promote_vendor();
|
|
acpi_video_unregister();
|
|
apple_bl_unregister();
|
|
|
|
gmux_data->power_state = VGA_SWITCHEROO_ON;
|
|
|
|
gmux_data->dhandle = DEVICE_ACPI_HANDLE(&pnp->dev);
|
|
if (!gmux_data->dhandle) {
|
|
pr_err("Cannot find acpi handle for pnp device %s\n",
|
|
dev_name(&pnp->dev));
|
|
ret = -ENODEV;
|
|
goto err_notify;
|
|
}
|
|
|
|
status = acpi_evaluate_integer(gmux_data->dhandle, "GMGP", NULL, &gpe);
|
|
if (ACPI_SUCCESS(status)) {
|
|
gmux_data->gpe = (int)gpe;
|
|
|
|
status = acpi_install_notify_handler(gmux_data->dhandle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
&gmux_notify_handler, pnp);
|
|
if (ACPI_FAILURE(status)) {
|
|
pr_err("Install notify handler failed: %s\n",
|
|
acpi_format_exception(status));
|
|
ret = -ENODEV;
|
|
goto err_notify;
|
|
}
|
|
|
|
status = acpi_enable_gpe(NULL, gmux_data->gpe);
|
|
if (ACPI_FAILURE(status)) {
|
|
pr_err("Cannot enable gpe: %s\n",
|
|
acpi_format_exception(status));
|
|
goto err_enable_gpe;
|
|
}
|
|
} else {
|
|
pr_warn("No GPE found for gmux\n");
|
|
gmux_data->gpe = -1;
|
|
}
|
|
|
|
if (vga_switcheroo_register_handler(&gmux_handler)) {
|
|
ret = -ENODEV;
|
|
goto err_register_handler;
|
|
}
|
|
|
|
init_completion(&gmux_data->powerchange_done);
|
|
apple_gmux_data = gmux_data;
|
|
gmux_enable_interrupts(gmux_data);
|
|
|
|
return 0;
|
|
|
|
err_register_handler:
|
|
if (gmux_data->gpe >= 0)
|
|
acpi_disable_gpe(NULL, gmux_data->gpe);
|
|
err_enable_gpe:
|
|
if (gmux_data->gpe >= 0)
|
|
acpi_remove_notify_handler(gmux_data->dhandle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
&gmux_notify_handler);
|
|
err_notify:
|
|
backlight_device_unregister(bdev);
|
|
err_release:
|
|
release_region(gmux_data->iostart, gmux_data->iolen);
|
|
err_free:
|
|
kfree(gmux_data);
|
|
return ret;
|
|
}
|
|
|
|
static void gmux_remove(struct pnp_dev *pnp)
|
|
{
|
|
struct apple_gmux_data *gmux_data = pnp_get_drvdata(pnp);
|
|
|
|
vga_switcheroo_unregister_handler();
|
|
gmux_disable_interrupts(gmux_data);
|
|
if (gmux_data->gpe >= 0) {
|
|
acpi_disable_gpe(NULL, gmux_data->gpe);
|
|
acpi_remove_notify_handler(gmux_data->dhandle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
&gmux_notify_handler);
|
|
}
|
|
|
|
backlight_device_unregister(gmux_data->bdev);
|
|
|
|
release_region(gmux_data->iostart, gmux_data->iolen);
|
|
apple_gmux_data = NULL;
|
|
kfree(gmux_data);
|
|
|
|
acpi_video_dmi_demote_vendor();
|
|
acpi_video_register();
|
|
apple_bl_register();
|
|
}
|
|
|
|
static const struct pnp_device_id gmux_device_ids[] = {
|
|
{"APP000B", 0},
|
|
{"", 0}
|
|
};
|
|
|
|
static struct pnp_driver gmux_pnp_driver = {
|
|
.name = "apple-gmux",
|
|
.probe = gmux_probe,
|
|
.remove = gmux_remove,
|
|
.id_table = gmux_device_ids,
|
|
.suspend = gmux_suspend,
|
|
.resume = gmux_resume
|
|
};
|
|
|
|
static int __init apple_gmux_init(void)
|
|
{
|
|
return pnp_register_driver(&gmux_pnp_driver);
|
|
}
|
|
|
|
static void __exit apple_gmux_exit(void)
|
|
{
|
|
pnp_unregister_driver(&gmux_pnp_driver);
|
|
}
|
|
|
|
module_init(apple_gmux_init);
|
|
module_exit(apple_gmux_exit);
|
|
|
|
MODULE_AUTHOR("Seth Forshee <seth.forshee@canonical.com>");
|
|
MODULE_DESCRIPTION("Apple Gmux Driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DEVICE_TABLE(pnp, gmux_device_ids);
|