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fdb79081fe
linux-next/drivers/platform/x86/toshiba_acpi.c
Azael Avalos fdb79081fe toshiba_acpi: Adapt Illumination code to use SCI 
Change the toshiba_illumination_* code to use the
newly introduced SCI functions, making the code
more robust in detecting Illumination capabilities
properly, since it was only opening the SCI and
the return value was never checked for errors or
actual Illumination support.

Signed-off-by: Azael Avalos <coproscefalo@gmail.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
2014-04-06 12:58:13 -04:00

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/*
* toshiba_acpi.c - Toshiba Laptop ACPI Extras
*
*
* Copyright (C) 2002-2004 John Belmonte
* Copyright (C) 2008 Philip Langdale
* Copyright (C) 2010 Pierre Ducroquet
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* The devolpment page for this driver is located at
* http://memebeam.org/toys/ToshibaAcpiDriver.
*
* Credits:
* Jonathan A. Buzzard - Toshiba HCI info, and critical tips on reverse
* engineering the Windows drivers
* Yasushi Nagato - changes for linux kernel 2.4 -> 2.5
* Rob Miller - TV out and hotkeys help
*
*
* TODO
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define TOSHIBA_ACPI_VERSION "0.19"
#define PROC_INTERFACE_VERSION 1
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/backlight.h>
#include <linux/rfkill.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/leds.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/i8042.h>
#include <linux/acpi.h>
#include <asm/uaccess.h>
MODULE_AUTHOR("John Belmonte");
MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver");
MODULE_LICENSE("GPL");
#define TOSHIBA_WMI_EVENT_GUID "59142400-C6A3-40FA-BADB-8A2652834100"
/* Scan code for Fn key on TOS1900 models */
#define TOS1900_FN_SCAN 0x6e
/* Toshiba ACPI method paths */
#define METHOD_VIDEO_OUT "\\_SB_.VALX.DSSX"
/* Toshiba HCI interface definitions
*
* HCI is Toshiba's "Hardware Control Interface" which is supposed to
* be uniform across all their models. Ideally we would just call
* dedicated ACPI methods instead of using this primitive interface.
* However the ACPI methods seem to be incomplete in some areas (for
* example they allow setting, but not reading, the LCD brightness value),
* so this is still useful.
*
* SCI stands for "System Configuration Interface" which aim is to
* conceal differences in hardware between different models.
*/
#define HCI_WORDS 6
/* operations */
#define HCI_SET 0xff00
#define HCI_GET 0xfe00
#define SCI_OPEN 0xf100
#define SCI_CLOSE 0xf200
#define SCI_GET 0xf300
#define SCI_SET 0xf400
/* return codes */
#define HCI_SUCCESS 0x0000
#define HCI_FAILURE 0x1000
#define HCI_NOT_SUPPORTED 0x8000
#define HCI_EMPTY 0x8c00
#define SCI_OPEN_CLOSE_OK 0x0044
#define SCI_ALREADY_OPEN 0x8100
#define SCI_NOT_OPENED 0x8200
#define SCI_INPUT_DATA_ERROR 0x8300
#define SCI_NOT_PRESENT 0x8600
/* registers */
#define HCI_FAN 0x0004
#define HCI_TR_BACKLIGHT 0x0005
#define HCI_SYSTEM_EVENT 0x0016
#define HCI_VIDEO_OUT 0x001c
#define HCI_HOTKEY_EVENT 0x001e
#define HCI_LCD_BRIGHTNESS 0x002a
#define HCI_WIRELESS 0x0056
#define SCI_ILLUMINATION 0x014e
/* field definitions */
#define HCI_HOTKEY_DISABLE 0x0b
#define HCI_HOTKEY_ENABLE 0x09
#define HCI_LCD_BRIGHTNESS_BITS 3
#define HCI_LCD_BRIGHTNESS_SHIFT (16-HCI_LCD_BRIGHTNESS_BITS)
#define HCI_LCD_BRIGHTNESS_LEVELS (1 << HCI_LCD_BRIGHTNESS_BITS)
#define HCI_VIDEO_OUT_LCD 0x1
#define HCI_VIDEO_OUT_CRT 0x2
#define HCI_VIDEO_OUT_TV 0x4
#define HCI_WIRELESS_KILL_SWITCH 0x01
#define HCI_WIRELESS_BT_PRESENT 0x0f
#define HCI_WIRELESS_BT_ATTACH 0x40
#define HCI_WIRELESS_BT_POWER 0x80
struct toshiba_acpi_dev {
struct acpi_device *acpi_dev;
const char *method_hci;
struct rfkill *bt_rfk;
struct input_dev *hotkey_dev;
struct work_struct hotkey_work;
struct backlight_device *backlight_dev;
struct led_classdev led_dev;
int force_fan;
int last_key_event;
int key_event_valid;
unsigned int illumination_supported:1;
unsigned int video_supported:1;
unsigned int fan_supported:1;
unsigned int system_event_supported:1;
unsigned int ntfy_supported:1;
unsigned int info_supported:1;
unsigned int tr_backlight_supported:1;
struct mutex mutex;
};
static struct toshiba_acpi_dev *toshiba_acpi;
static const struct acpi_device_id toshiba_device_ids[] = {
{"TOS6200", 0},
{"TOS6208", 0},
{"TOS1900", 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, toshiba_device_ids);
static const struct key_entry toshiba_acpi_keymap[] = {
{ KE_KEY, 0x9e, { KEY_RFKILL } },
{ KE_KEY, 0x101, { KEY_MUTE } },
{ KE_KEY, 0x102, { KEY_ZOOMOUT } },
{ KE_KEY, 0x103, { KEY_ZOOMIN } },
{ KE_KEY, 0x12c, { KEY_KBDILLUMTOGGLE } },
{ KE_KEY, 0x139, { KEY_ZOOMRESET } },
{ KE_KEY, 0x13b, { KEY_COFFEE } },
{ KE_KEY, 0x13c, { KEY_BATTERY } },
{ KE_KEY, 0x13d, { KEY_SLEEP } },
{ KE_KEY, 0x13e, { KEY_SUSPEND } },
{ KE_KEY, 0x13f, { KEY_SWITCHVIDEOMODE } },
{ KE_KEY, 0x140, { KEY_BRIGHTNESSDOWN } },
{ KE_KEY, 0x141, { KEY_BRIGHTNESSUP } },
{ KE_KEY, 0x142, { KEY_WLAN } },
{ KE_KEY, 0x143, { KEY_TOUCHPAD_TOGGLE } },
{ KE_KEY, 0x17f, { KEY_FN } },
{ KE_KEY, 0xb05, { KEY_PROG2 } },
{ KE_KEY, 0xb06, { KEY_WWW } },
{ KE_KEY, 0xb07, { KEY_MAIL } },
{ KE_KEY, 0xb30, { KEY_STOP } },
{ KE_KEY, 0xb31, { KEY_PREVIOUSSONG } },
{ KE_KEY, 0xb32, { KEY_NEXTSONG } },
{ KE_KEY, 0xb33, { KEY_PLAYPAUSE } },
{ KE_KEY, 0xb5a, { KEY_MEDIA } },
{ KE_IGNORE, 0x1430, { KEY_RESERVED } },
{ KE_END, 0 },
};
/* utility
*/
static __inline__ void _set_bit(u32 * word, u32 mask, int value)
{
*word = (*word & ~mask) | (mask * value);
}
/* acpi interface wrappers
*/
static int write_acpi_int(const char *methodName, int val)
{
acpi_status status;
status = acpi_execute_simple_method(NULL, (char *)methodName, val);
return (status == AE_OK) ? 0 : -EIO;
}
/* Perform a raw HCI call. Here we don't care about input or output buffer
* format.
*/
static acpi_status hci_raw(struct toshiba_acpi_dev *dev,
const u32 in[HCI_WORDS], u32 out[HCI_WORDS])
{
struct acpi_object_list params;
union acpi_object in_objs[HCI_WORDS];
struct acpi_buffer results;
union acpi_object out_objs[HCI_WORDS + 1];
acpi_status status;
int i;
params.count = HCI_WORDS;
params.pointer = in_objs;
for (i = 0; i < HCI_WORDS; ++i) {
in_objs[i].type = ACPI_TYPE_INTEGER;
in_objs[i].integer.value = in[i];
}
results.length = sizeof(out_objs);
results.pointer = out_objs;
status = acpi_evaluate_object(dev->acpi_dev->handle,
(char *)dev->method_hci, &params,
&results);
if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) {
for (i = 0; i < out_objs->package.count; ++i) {
out[i] = out_objs->package.elements[i].integer.value;
}
}
return status;
}
/* common hci tasks (get or set one or two value)
*
* In addition to the ACPI status, the HCI system returns a result which
* may be useful (such as "not supported").
*/
static acpi_status hci_write1(struct toshiba_acpi_dev *dev, u32 reg,
u32 in1, u32 *result)
{
u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 };
u32 out[HCI_WORDS];
acpi_status status = hci_raw(dev, in, out);
*result = (status == AE_OK) ? out[0] : HCI_FAILURE;
return status;
}
static acpi_status hci_read1(struct toshiba_acpi_dev *dev, u32 reg,
u32 *out1, u32 *result)
{
u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 };
u32 out[HCI_WORDS];
acpi_status status = hci_raw(dev, in, out);
*out1 = out[2];
*result = (status == AE_OK) ? out[0] : HCI_FAILURE;
return status;
}
static acpi_status hci_write2(struct toshiba_acpi_dev *dev, u32 reg,
u32 in1, u32 in2, u32 *result)
{
u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 };
u32 out[HCI_WORDS];
acpi_status status = hci_raw(dev, in, out);
*result = (status == AE_OK) ? out[0] : HCI_FAILURE;
return status;
}
static acpi_status hci_read2(struct toshiba_acpi_dev *dev, u32 reg,
u32 *out1, u32 *out2, u32 *result)
{
u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 };
u32 out[HCI_WORDS];
acpi_status status = hci_raw(dev, in, out);
*out1 = out[2];
*out2 = out[3];
*result = (status == AE_OK) ? out[0] : HCI_FAILURE;
return status;
}
/* common sci tasks
*/
static int sci_open(struct toshiba_acpi_dev *dev)
{
u32 in[HCI_WORDS] = { SCI_OPEN, 0, 0, 0, 0, 0 };
u32 out[HCI_WORDS];
acpi_status status;
status = hci_raw(dev, in, out);
if (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
pr_err("ACPI call to open SCI failed\n");
return 0;
}
if (out[0] == SCI_OPEN_CLOSE_OK) {
return 1;
} else if (out[0] == SCI_ALREADY_OPEN) {
pr_info("Toshiba SCI already opened\n");
return 1;
} else if (out[0] == SCI_NOT_PRESENT) {
pr_info("Toshiba SCI is not present\n");
}
return 0;
}
static void sci_close(struct toshiba_acpi_dev *dev)
{
u32 in[HCI_WORDS] = { SCI_CLOSE, 0, 0, 0, 0, 0 };
u32 out[HCI_WORDS];
acpi_status status;
status = hci_raw(dev, in, out);
if (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
pr_err("ACPI call to close SCI failed\n");
return;
}
if (out[0] == SCI_OPEN_CLOSE_OK)
return;
else if (out[0] == SCI_NOT_OPENED)
pr_info("Toshiba SCI not opened\n");
else if (out[0] == SCI_NOT_PRESENT)
pr_info("Toshiba SCI is not present\n");
}
static acpi_status sci_read(struct toshiba_acpi_dev *dev, u32 reg,
u32 *out1, u32 *result)
{
u32 in[HCI_WORDS] = { SCI_GET, reg, 0, 0, 0, 0 };
u32 out[HCI_WORDS];
acpi_status status = hci_raw(dev, in, out);
*out1 = out[2];
*result = (ACPI_SUCCESS(status)) ? out[0] : HCI_FAILURE;
return status;
}
static acpi_status sci_write(struct toshiba_acpi_dev *dev, u32 reg,
u32 in1, u32 *result)
{
u32 in[HCI_WORDS] = { SCI_SET, reg, in1, 0, 0, 0 };
u32 out[HCI_WORDS];
acpi_status status = hci_raw(dev, in, out);
*result = (ACPI_SUCCESS(status)) ? out[0] : HCI_FAILURE;
return status;
}
/* Illumination support */
static int toshiba_illumination_available(struct toshiba_acpi_dev *dev)
{
u32 in[HCI_WORDS] = { SCI_GET, SCI_ILLUMINATION, 0, 0, 0, 0 };
u32 out[HCI_WORDS];
acpi_status status;
if (!sci_open(dev))
return 0;
status = hci_raw(dev, in, out);
sci_close(dev);
if (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) {
pr_err("ACPI call to query Illumination support failed\n");
return 0;
} else if (out[0] == HCI_NOT_SUPPORTED || out[1] != 1) {
pr_info("Illumination device not available\n");
return 0;
}
return 1;
}
static void toshiba_illumination_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct toshiba_acpi_dev *dev = container_of(cdev,
struct toshiba_acpi_dev, led_dev);
u32 state, result;
acpi_status status;
/* First request : initialize communication. */
if (!sci_open(dev))
return;
/* Switch the illumination on/off */
state = brightness ? 1 : 0;
status = sci_write(dev, SCI_ILLUMINATION, state, &result);
sci_close(dev);
if (ACPI_FAILURE(status)) {
pr_err("ACPI call for illumination failed\n");
return;
} else if (result == HCI_NOT_SUPPORTED) {
pr_info("Illumination not supported\n");
return;
}
}
static enum led_brightness toshiba_illumination_get(struct led_classdev *cdev)
{
struct toshiba_acpi_dev *dev = container_of(cdev,
struct toshiba_acpi_dev, led_dev);
u32 state, result;
acpi_status status;
/* First request : initialize communication. */
if (!sci_open(dev))
return LED_OFF;
/* Check the illumination */
status = sci_read(dev, SCI_ILLUMINATION, &state, &result);
sci_close(dev);
if (ACPI_FAILURE(status) || result == SCI_INPUT_DATA_ERROR) {
pr_err("ACPI call for illumination failed\n");
return LED_OFF;
} else if (result == HCI_NOT_SUPPORTED) {
pr_info("Illumination not supported\n");
return LED_OFF;
}
return state ? LED_FULL : LED_OFF;
}
/* Bluetooth rfkill handlers */
static u32 hci_get_bt_present(struct toshiba_acpi_dev *dev, bool *present)
{
u32 hci_result;
u32 value, value2;
value = 0;
value2 = 0;
hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
if (hci_result == HCI_SUCCESS)
*present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false;
return hci_result;
}
static u32 hci_get_radio_state(struct toshiba_acpi_dev *dev, bool *radio_state)
{
u32 hci_result;
u32 value, value2;
value = 0;
value2 = 0x0001;
hci_read2(dev, HCI_WIRELESS, &value, &value2, &hci_result);
*radio_state = value & HCI_WIRELESS_KILL_SWITCH;
return hci_result;
}
static int bt_rfkill_set_block(void *data, bool blocked)
{
struct toshiba_acpi_dev *dev = data;
u32 result1, result2;
u32 value;
int err;
bool radio_state;
value = (blocked == false);
mutex_lock(&dev->mutex);
if (hci_get_radio_state(dev, &radio_state) != HCI_SUCCESS) {
err = -EIO;
goto out;
}
if (!radio_state) {
err = 0;
goto out;
}
hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1);
hci_write2(dev, HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2);
if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS)
err = -EIO;
else
err = 0;
out:
mutex_unlock(&dev->mutex);
return err;
}
static void bt_rfkill_poll(struct rfkill *rfkill, void *data)
{
bool new_rfk_state;
bool value;
u32 hci_result;
struct toshiba_acpi_dev *dev = data;
mutex_lock(&dev->mutex);
hci_result = hci_get_radio_state(dev, &value);
if (hci_result != HCI_SUCCESS) {
/* Can't do anything useful */
mutex_unlock(&dev->mutex);
return;
}
new_rfk_state = value;
mutex_unlock(&dev->mutex);
if (rfkill_set_hw_state(rfkill, !new_rfk_state))
bt_rfkill_set_block(data, true);
}
static const struct rfkill_ops toshiba_rfk_ops = {
.set_block = bt_rfkill_set_block,
.poll = bt_rfkill_poll,
};
static int get_tr_backlight_status(struct toshiba_acpi_dev *dev, bool *enabled)
{
u32 hci_result;
u32 status;
hci_read1(dev, HCI_TR_BACKLIGHT, &status, &hci_result);
*enabled = !status;
return hci_result == HCI_SUCCESS ? 0 : -EIO;
}
static int set_tr_backlight_status(struct toshiba_acpi_dev *dev, bool enable)
{
u32 hci_result;
u32 value = !enable;
hci_write1(dev, HCI_TR_BACKLIGHT, value, &hci_result);
return hci_result == HCI_SUCCESS ? 0 : -EIO;
}
static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ;
static int __get_lcd_brightness(struct toshiba_acpi_dev *dev)
{
u32 hci_result;
u32 value;
int brightness = 0;
if (dev->tr_backlight_supported) {
bool enabled;
int ret = get_tr_backlight_status(dev, &enabled);
if (ret)
return ret;
if (enabled)
return 0;
brightness++;
}
hci_read1(dev, HCI_LCD_BRIGHTNESS, &value, &hci_result);
if (hci_result == HCI_SUCCESS)
return brightness + (value >> HCI_LCD_BRIGHTNESS_SHIFT);
return -EIO;
}
static int get_lcd_brightness(struct backlight_device *bd)
{
struct toshiba_acpi_dev *dev = bl_get_data(bd);
return __get_lcd_brightness(dev);
}
static int lcd_proc_show(struct seq_file *m, void *v)
{
struct toshiba_acpi_dev *dev = m->private;
int value;
int levels;
if (!dev->backlight_dev)
return -ENODEV;
levels = dev->backlight_dev->props.max_brightness + 1;
value = get_lcd_brightness(dev->backlight_dev);
if (value >= 0) {
seq_printf(m, "brightness: %d\n", value);
seq_printf(m, "brightness_levels: %d\n", levels);
return 0;
}
pr_err("Error reading LCD brightness\n");
return -EIO;
}
static int lcd_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, lcd_proc_show, PDE_DATA(inode));
}
static int set_lcd_brightness(struct toshiba_acpi_dev *dev, int value)
{
u32 hci_result;
if (dev->tr_backlight_supported) {
bool enable = !value;
int ret = set_tr_backlight_status(dev, enable);
if (ret)
return ret;
if (value)
value--;
}
value = value << HCI_LCD_BRIGHTNESS_SHIFT;
hci_write1(dev, HCI_LCD_BRIGHTNESS, value, &hci_result);
return hci_result == HCI_SUCCESS ? 0 : -EIO;
}
static int set_lcd_status(struct backlight_device *bd)
{
struct toshiba_acpi_dev *dev = bl_get_data(bd);
return set_lcd_brightness(dev, bd->props.brightness);
}
static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{
struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
char cmd[42];
size_t len;
int value;
int ret;
int levels = dev->backlight_dev->props.max_brightness + 1;
len = min(count, sizeof(cmd) - 1);
if (copy_from_user(cmd, buf, len))
return -EFAULT;
cmd[len] = '\0';
if (sscanf(cmd, " brightness : %i", &value) == 1 &&
value >= 0 && value < levels) {
ret = set_lcd_brightness(dev, value);
if (ret == 0)
ret = count;
} else {
ret = -EINVAL;
}
return ret;
}
static const struct file_operations lcd_proc_fops = {
.owner = THIS_MODULE,
.open = lcd_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = lcd_proc_write,
};
static int get_video_status(struct toshiba_acpi_dev *dev, u32 *status)
{
u32 hci_result;
hci_read1(dev, HCI_VIDEO_OUT, status, &hci_result);
return hci_result == HCI_SUCCESS ? 0 : -EIO;
}
static int video_proc_show(struct seq_file *m, void *v)
{
struct toshiba_acpi_dev *dev = m->private;
u32 value;
int ret;
ret = get_video_status(dev, &value);
if (!ret) {
int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
seq_printf(m, "lcd_out: %d\n", is_lcd);
seq_printf(m, "crt_out: %d\n", is_crt);
seq_printf(m, "tv_out: %d\n", is_tv);
}
return ret;
}
static int video_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, video_proc_show, PDE_DATA(inode));
}
static ssize_t video_proc_write(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{
struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
char *cmd, *buffer;
int ret;
int value;
int remain = count;
int lcd_out = -1;
int crt_out = -1;
int tv_out = -1;
u32 video_out;
cmd = kmalloc(count + 1, GFP_KERNEL);
if (!cmd)
return -ENOMEM;
if (copy_from_user(cmd, buf, count)) {
kfree(cmd);
return -EFAULT;
}
cmd[count] = '\0';
buffer = cmd;
/* scan expression. Multiple expressions may be delimited with ;
*
* NOTE: to keep scanning simple, invalid fields are ignored
*/
while (remain) {
if (sscanf(buffer, " lcd_out : %i", &value) == 1)
lcd_out = value & 1;
else if (sscanf(buffer, " crt_out : %i", &value) == 1)
crt_out = value & 1;
else if (sscanf(buffer, " tv_out : %i", &value) == 1)
tv_out = value & 1;
/* advance to one character past the next ; */
do {
++buffer;
--remain;
}
while (remain && *(buffer - 1) != ';');
}
kfree(cmd);
ret = get_video_status(dev, &video_out);
if (!ret) {
unsigned int new_video_out = video_out;
if (lcd_out != -1)
_set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
if (crt_out != -1)
_set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out);
if (tv_out != -1)
_set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out);
/* To avoid unnecessary video disruption, only write the new
* video setting if something changed. */
if (new_video_out != video_out)
ret = write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
}
return ret ? ret : count;
}
static const struct file_operations video_proc_fops = {
.owner = THIS_MODULE,
.open = video_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = video_proc_write,
};
static int get_fan_status(struct toshiba_acpi_dev *dev, u32 *status)
{
u32 hci_result;
hci_read1(dev, HCI_FAN, status, &hci_result);
return hci_result == HCI_SUCCESS ? 0 : -EIO;
}
static int fan_proc_show(struct seq_file *m, void *v)
{
struct toshiba_acpi_dev *dev = m->private;
int ret;
u32 value;
ret = get_fan_status(dev, &value);
if (!ret) {
seq_printf(m, "running: %d\n", (value > 0));
seq_printf(m, "force_on: %d\n", dev->force_fan);
}
return ret;
}
static int fan_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, fan_proc_show, PDE_DATA(inode));
}
static ssize_t fan_proc_write(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{
struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
char cmd[42];
size_t len;
int value;
u32 hci_result;
len = min(count, sizeof(cmd) - 1);
if (copy_from_user(cmd, buf, len))
return -EFAULT;
cmd[len] = '\0';
if (sscanf(cmd, " force_on : %i", &value) == 1 &&
value >= 0 && value <= 1) {
hci_write1(dev, HCI_FAN, value, &hci_result);
if (hci_result != HCI_SUCCESS)
return -EIO;
else
dev->force_fan = value;
} else {
return -EINVAL;
}
return count;
}
static const struct file_operations fan_proc_fops = {
.owner = THIS_MODULE,
.open = fan_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = fan_proc_write,
};
static int keys_proc_show(struct seq_file *m, void *v)
{
struct toshiba_acpi_dev *dev = m->private;
u32 hci_result;
u32 value;
if (!dev->key_event_valid && dev->system_event_supported) {
hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
if (hci_result == HCI_SUCCESS) {
dev->key_event_valid = 1;
dev->last_key_event = value;
} else if (hci_result == HCI_EMPTY) {
/* better luck next time */
} else if (hci_result == HCI_NOT_SUPPORTED) {
/* This is a workaround for an unresolved issue on
* some machines where system events sporadically
* become disabled. */
hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
pr_notice("Re-enabled hotkeys\n");
} else {
pr_err("Error reading hotkey status\n");
return -EIO;
}
}
seq_printf(m, "hotkey_ready: %d\n", dev->key_event_valid);
seq_printf(m, "hotkey: 0x%04x\n", dev->last_key_event);
return 0;
}
static int keys_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, keys_proc_show, PDE_DATA(inode));
}
static ssize_t keys_proc_write(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{
struct toshiba_acpi_dev *dev = PDE_DATA(file_inode(file));
char cmd[42];
size_t len;
int value;
len = min(count, sizeof(cmd) - 1);
if (copy_from_user(cmd, buf, len))
return -EFAULT;
cmd[len] = '\0';
if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) {
dev->key_event_valid = 0;
} else {
return -EINVAL;
}
return count;
}
static const struct file_operations keys_proc_fops = {
.owner = THIS_MODULE,
.open = keys_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = keys_proc_write,
};
static int version_proc_show(struct seq_file *m, void *v)
{
seq_printf(m, "driver: %s\n", TOSHIBA_ACPI_VERSION);
seq_printf(m, "proc_interface: %d\n", PROC_INTERFACE_VERSION);
return 0;
}
static int version_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, version_proc_show, PDE_DATA(inode));
}
static const struct file_operations version_proc_fops = {
.owner = THIS_MODULE,
.open = version_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/* proc and module init
*/
#define PROC_TOSHIBA "toshiba"
static void create_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
{
if (dev->backlight_dev)
proc_create_data("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir,
&lcd_proc_fops, dev);
if (dev->video_supported)
proc_create_data("video", S_IRUGO | S_IWUSR, toshiba_proc_dir,
&video_proc_fops, dev);
if (dev->fan_supported)
proc_create_data("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir,
&fan_proc_fops, dev);
if (dev->hotkey_dev)
proc_create_data("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir,
&keys_proc_fops, dev);
proc_create_data("version", S_IRUGO, toshiba_proc_dir,
&version_proc_fops, dev);
}
static void remove_toshiba_proc_entries(struct toshiba_acpi_dev *dev)
{
if (dev->backlight_dev)
remove_proc_entry("lcd", toshiba_proc_dir);
if (dev->video_supported)
remove_proc_entry("video", toshiba_proc_dir);
if (dev->fan_supported)
remove_proc_entry("fan", toshiba_proc_dir);
if (dev->hotkey_dev)
remove_proc_entry("keys", toshiba_proc_dir);
remove_proc_entry("version", toshiba_proc_dir);
}
static const struct backlight_ops toshiba_backlight_data = {
.options = BL_CORE_SUSPENDRESUME,
.get_brightness = get_lcd_brightness,
.update_status = set_lcd_status,
};
static bool toshiba_acpi_i8042_filter(unsigned char data, unsigned char str,
struct serio *port)
{
if (str & 0x20)
return false;
if (unlikely(data == 0xe0))
return false;
if ((data & 0x7f) == TOS1900_FN_SCAN) {
schedule_work(&toshiba_acpi->hotkey_work);
return true;
}
return false;
}
static void toshiba_acpi_hotkey_work(struct work_struct *work)
{
acpi_handle ec_handle = ec_get_handle();
acpi_status status;
if (!ec_handle)
return;
status = acpi_evaluate_object(ec_handle, "NTFY", NULL, NULL);
if (ACPI_FAILURE(status))
pr_err("ACPI NTFY method execution failed\n");
}
/*
* Returns hotkey scancode, or < 0 on failure.
*/
static int toshiba_acpi_query_hotkey(struct toshiba_acpi_dev *dev)
{
unsigned long long value;
acpi_status status;
status = acpi_evaluate_integer(dev->acpi_dev->handle, "INFO",
NULL, &value);
if (ACPI_FAILURE(status)) {
pr_err("ACPI INFO method execution failed\n");
return -EIO;
}
return value;
}
static void toshiba_acpi_report_hotkey(struct toshiba_acpi_dev *dev,
int scancode)
{
if (scancode == 0x100)
return;
/* act on key press; ignore key release */
if (scancode & 0x80)
return;
if (!sparse_keymap_report_event(dev->hotkey_dev, scancode, 1, true))
pr_info("Unknown key %x\n", scancode);
}
static int toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev)
{
acpi_status status;
acpi_handle ec_handle;
int error;
u32 hci_result;
dev->hotkey_dev = input_allocate_device();
if (!dev->hotkey_dev)
return -ENOMEM;
dev->hotkey_dev->name = "Toshiba input device";
dev->hotkey_dev->phys = "toshiba_acpi/input0";
dev->hotkey_dev->id.bustype = BUS_HOST;
error = sparse_keymap_setup(dev->hotkey_dev, toshiba_acpi_keymap, NULL);
if (error)
goto err_free_dev;
/*
* For some machines the SCI responsible for providing hotkey
* notification doesn't fire. We can trigger the notification
* whenever the Fn key is pressed using the NTFY method, if
* supported, so if it's present set up an i8042 key filter
* for this purpose.
*/
status = AE_ERROR;
ec_handle = ec_get_handle();
if (ec_handle && acpi_has_method(ec_handle, "NTFY")) {
INIT_WORK(&dev->hotkey_work, toshiba_acpi_hotkey_work);
error = i8042_install_filter(toshiba_acpi_i8042_filter);
if (error) {
pr_err("Error installing key filter\n");
goto err_free_keymap;
}
dev->ntfy_supported = 1;
}
/*
* Determine hotkey query interface. Prefer using the INFO
* method when it is available.
*/
if (acpi_has_method(dev->acpi_dev->handle, "INFO"))
dev->info_supported = 1;
else {
hci_write1(dev, HCI_SYSTEM_EVENT, 1, &hci_result);
if (hci_result == HCI_SUCCESS)
dev->system_event_supported = 1;
}
if (!dev->info_supported && !dev->system_event_supported) {
pr_warn("No hotkey query interface found\n");
goto err_remove_filter;
}
status = acpi_evaluate_object(dev->acpi_dev->handle, "ENAB", NULL, NULL);
if (ACPI_FAILURE(status)) {
pr_info("Unable to enable hotkeys\n");
error = -ENODEV;
goto err_remove_filter;
}
error = input_register_device(dev->hotkey_dev);
if (error) {
pr_info("Unable to register input device\n");
goto err_remove_filter;
}
hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &hci_result);
return 0;
err_remove_filter:
if (dev->ntfy_supported)
i8042_remove_filter(toshiba_acpi_i8042_filter);
err_free_keymap:
sparse_keymap_free(dev->hotkey_dev);
err_free_dev:
input_free_device(dev->hotkey_dev);
dev->hotkey_dev = NULL;
return error;
}
static int toshiba_acpi_setup_backlight(struct toshiba_acpi_dev *dev)
{
struct backlight_properties props;
int brightness;
int ret;
bool enabled;
/*
* Some machines don't support the backlight methods at all, and
* others support it read-only. Either of these is pretty useless,
* so only register the backlight device if the backlight method
* supports both reads and writes.
*/
brightness = __get_lcd_brightness(dev);
if (brightness < 0)
return 0;
ret = set_lcd_brightness(dev, brightness);
if (ret) {
pr_debug("Backlight method is read-only, disabling backlight support\n");
return 0;
}
/* Determine whether or not BIOS supports transflective backlight */
ret = get_tr_backlight_status(dev, &enabled);
dev->tr_backlight_supported = !ret;
memset(&props, 0, sizeof(props));
props.type = BACKLIGHT_PLATFORM;
props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
/* adding an extra level and having 0 change to transflective mode */
if (dev->tr_backlight_supported)
props.max_brightness++;
dev->backlight_dev = backlight_device_register("toshiba",
&dev->acpi_dev->dev,
dev,
&toshiba_backlight_data,
&props);
if (IS_ERR(dev->backlight_dev)) {
ret = PTR_ERR(dev->backlight_dev);
pr_err("Could not register toshiba backlight device\n");
dev->backlight_dev = NULL;
return ret;
}
dev->backlight_dev->props.brightness = brightness;
return 0;
}
static int toshiba_acpi_remove(struct acpi_device *acpi_dev)
{
struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
remove_toshiba_proc_entries(dev);
if (dev->ntfy_supported) {
i8042_remove_filter(toshiba_acpi_i8042_filter);
cancel_work_sync(&dev->hotkey_work);
}
if (dev->hotkey_dev) {
input_unregister_device(dev->hotkey_dev);
sparse_keymap_free(dev->hotkey_dev);
}
if (dev->bt_rfk) {
rfkill_unregister(dev->bt_rfk);
rfkill_destroy(dev->bt_rfk);
}
if (dev->backlight_dev)
backlight_device_unregister(dev->backlight_dev);
if (dev->illumination_supported)
led_classdev_unregister(&dev->led_dev);
if (toshiba_acpi)
toshiba_acpi = NULL;
kfree(dev);
return 0;
}
static const char *find_hci_method(acpi_handle handle)
{
if (acpi_has_method(handle, "GHCI"))
return "GHCI";
if (acpi_has_method(handle, "SPFC"))
return "SPFC";
return NULL;
}
static int toshiba_acpi_add(struct acpi_device *acpi_dev)
{
struct toshiba_acpi_dev *dev;
const char *hci_method;
u32 dummy;
bool bt_present;
int ret = 0;
if (toshiba_acpi)
return -EBUSY;
pr_info("Toshiba Laptop ACPI Extras version %s\n",
TOSHIBA_ACPI_VERSION);
hci_method = find_hci_method(acpi_dev->handle);
if (!hci_method) {
pr_err("HCI interface not found\n");
return -ENODEV;
}
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
dev->acpi_dev = acpi_dev;
dev->method_hci = hci_method;
acpi_dev->driver_data = dev;
if (toshiba_acpi_setup_keyboard(dev))
pr_info("Unable to activate hotkeys\n");
mutex_init(&dev->mutex);
ret = toshiba_acpi_setup_backlight(dev);
if (ret)
goto error;
/* Register rfkill switch for Bluetooth */
if (hci_get_bt_present(dev, &bt_present) == HCI_SUCCESS && bt_present) {
dev->bt_rfk = rfkill_alloc("Toshiba Bluetooth",
&acpi_dev->dev,
RFKILL_TYPE_BLUETOOTH,
&toshiba_rfk_ops,
dev);
if (!dev->bt_rfk) {
pr_err("unable to allocate rfkill device\n");
ret = -ENOMEM;
goto error;
}
ret = rfkill_register(dev->bt_rfk);
if (ret) {
pr_err("unable to register rfkill device\n");
rfkill_destroy(dev->bt_rfk);
goto error;
}
}
if (toshiba_illumination_available(dev)) {
dev->led_dev.name = "toshiba::illumination";
dev->led_dev.max_brightness = 1;
dev->led_dev.brightness_set = toshiba_illumination_set;
dev->led_dev.brightness_get = toshiba_illumination_get;
if (!led_classdev_register(&acpi_dev->dev, &dev->led_dev))
dev->illumination_supported = 1;
}
/* Determine whether or not BIOS supports fan and video interfaces */
ret = get_video_status(dev, &dummy);
dev->video_supported = !ret;
ret = get_fan_status(dev, &dummy);
dev->fan_supported = !ret;
create_toshiba_proc_entries(dev);
toshiba_acpi = dev;
return 0;
error:
toshiba_acpi_remove(acpi_dev);
return ret;
}
static void toshiba_acpi_notify(struct acpi_device *acpi_dev, u32 event)
{
struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
u32 hci_result, value;
int retries = 3;
int scancode;
if (event != 0x80)
return;
if (dev->info_supported) {
scancode = toshiba_acpi_query_hotkey(dev);
if (scancode < 0)
pr_err("Failed to query hotkey event\n");
else if (scancode != 0)
toshiba_acpi_report_hotkey(dev, scancode);
} else if (dev->system_event_supported) {
do {
hci_read1(dev, HCI_SYSTEM_EVENT, &value, &hci_result);
switch (hci_result) {
case HCI_SUCCESS:
toshiba_acpi_report_hotkey(dev, (int)value);
break;
case HCI_NOT_SUPPORTED:
/*
* This is a workaround for an unresolved
* issue on some machines where system events
* sporadically become disabled.
*/
hci_write1(dev, HCI_SYSTEM_EVENT, 1,
&hci_result);
pr_notice("Re-enabled hotkeys\n");
/* fall through */
default:
retries--;
break;
}
} while (retries && hci_result != HCI_EMPTY);
}
}
#ifdef CONFIG_PM_SLEEP
static int toshiba_acpi_suspend(struct device *device)
{
struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device));
u32 result;
if (dev->hotkey_dev)
hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_DISABLE, &result);
return 0;
}
static int toshiba_acpi_resume(struct device *device)
{
struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device));
u32 result;
if (dev->hotkey_dev)
hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &result);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(toshiba_acpi_pm,
toshiba_acpi_suspend, toshiba_acpi_resume);
static struct acpi_driver toshiba_acpi_driver = {
.name = "Toshiba ACPI driver",
.owner = THIS_MODULE,
.ids = toshiba_device_ids,
.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
.ops = {
.add = toshiba_acpi_add,
.remove = toshiba_acpi_remove,
.notify = toshiba_acpi_notify,
},
.drv.pm = &toshiba_acpi_pm,
};
static int __init toshiba_acpi_init(void)
{
int ret;
/*
* Machines with this WMI guid aren't supported due to bugs in
* their AML. This check relies on wmi initializing before
* toshiba_acpi to guarantee guids have been identified.
*/
if (wmi_has_guid(TOSHIBA_WMI_EVENT_GUID))
return -ENODEV;
toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
if (!toshiba_proc_dir) {
pr_err("Unable to create proc dir " PROC_TOSHIBA "\n");
return -ENODEV;
}
ret = acpi_bus_register_driver(&toshiba_acpi_driver);
if (ret) {
pr_err("Failed to register ACPI driver: %d\n", ret);
remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
}
return ret;
}
static void __exit toshiba_acpi_exit(void)
{
acpi_bus_unregister_driver(&toshiba_acpi_driver);
if (toshiba_proc_dir)
remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
}
module_init(toshiba_acpi_init);
module_exit(toshiba_acpi_exit);
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