diff options
Diffstat (limited to 'drivers/platform/x86/toshiba_acpi.c')
| -rw-r--r-- | drivers/platform/x86/toshiba_acpi.c | 1285 |
1 files changed, 1285 insertions, 0 deletions
diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c new file mode 100644 index 00000000..ee79ce64 --- /dev/null +++ b/drivers/platform/x86/toshiba_acpi.c @@ -0,0 +1,1285 @@ +/* + * 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 <asm/uaccess.h> + +#include <acpi/acpi_drivers.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. + */ + +#define HCI_WORDS 6 + +/* operations */ +#define HCI_SET 0xff00 +#define HCI_GET 0xfe00 + +/* return codes */ +#define HCI_SUCCESS 0x0000 +#define HCI_FAILURE 0x1000 +#define HCI_NOT_SUPPORTED 0x8000 +#define HCI_EMPTY 0x8c00 + +/* registers */ +#define HCI_FAN 0x0004 +#define HCI_SYSTEM_EVENT 0x0016 +#define HCI_VIDEO_OUT 0x001c +#define HCI_HOTKEY_EVENT 0x001e +#define HCI_LCD_BRIGHTNESS 0x002a +#define HCI_WIRELESS 0x0056 + +/* 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; + + 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[] __devinitconst = { + { 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) +{ + struct acpi_object_list params; + union acpi_object in_objs[1]; + acpi_status status; + + params.count = ARRAY_SIZE(in_objs); + params.pointer = in_objs; + in_objs[0].type = ACPI_TYPE_INTEGER; + in_objs[0].integer.value = val; + + status = acpi_evaluate_object(NULL, (char *)methodName, ¶ms, NULL); + 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, ¶ms, + &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; +} + +/* Illumination support */ +static int toshiba_illumination_available(struct toshiba_acpi_dev *dev) +{ + u32 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 }; + u32 out[HCI_WORDS]; + acpi_status status; + + in[0] = 0xf100; + status = hci_raw(dev, in, out); + if (ACPI_FAILURE(status)) { + pr_info("Illumination device not available\n"); + return 0; + } + in[0] = 0xf400; + status = hci_raw(dev, in, out); + 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 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 }; + u32 out[HCI_WORDS]; + acpi_status status; + + /* First request : initialize communication. */ + in[0] = 0xf100; + status = hci_raw(dev, in, out); + if (ACPI_FAILURE(status)) { + pr_info("Illumination device not available\n"); + return; + } + + if (brightness) { + /* Switch the illumination on */ + in[0] = 0xf400; + in[1] = 0x14e; + in[2] = 1; + status = hci_raw(dev, in, out); + if (ACPI_FAILURE(status)) { + pr_info("ACPI call for illumination failed\n"); + return; + } + } else { + /* Switch the illumination off */ + in[0] = 0xf400; + in[1] = 0x14e; + in[2] = 0; + status = hci_raw(dev, in, out); + if (ACPI_FAILURE(status)) { + pr_info("ACPI call for illumination failed.\n"); + return; + } + } + + /* Last request : close communication. */ + in[0] = 0xf200; + in[1] = 0; + in[2] = 0; + hci_raw(dev, in, out); +} + +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 in[HCI_WORDS] = { 0, 0, 0, 0, 0, 0 }; + u32 out[HCI_WORDS]; + acpi_status status; + enum led_brightness result; + + /* First request : initialize communication. */ + in[0] = 0xf100; + status = hci_raw(dev, in, out); + if (ACPI_FAILURE(status)) { + pr_info("Illumination device not available\n"); + return LED_OFF; + } + + /* Check the illumination */ + in[0] = 0xf300; + in[1] = 0x14e; + status = hci_raw(dev, in, out); + if (ACPI_FAILURE(status)) { + pr_info("ACPI call for illumination failed.\n"); + return LED_OFF; + } + + result = out[2] ? LED_FULL : LED_OFF; + + /* Last request : close communication. */ + in[0] = 0xf200; + in[1] = 0; + in[2] = 0; + hci_raw(dev, in, out); + + return result; +} + +/* 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 struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ; + +static int get_lcd(struct backlight_device *bd) +{ + struct toshiba_acpi_dev *dev = bl_get_data(bd); + u32 hci_result; + u32 value; + + hci_read1(dev, HCI_LCD_BRIGHTNESS, &value, &hci_result); + if (hci_result == HCI_SUCCESS) + return (value >> HCI_LCD_BRIGHTNESS_SHIFT); + + return -EIO; +} + +static int lcd_proc_show(struct seq_file *m, void *v) +{ + struct toshiba_acpi_dev *dev = m->private; + int value; + + if (!dev->backlight_dev) + return -ENODEV; + + value = get_lcd(dev->backlight_dev); + if (value >= 0) { + seq_printf(m, "brightness: %d\n", value); + seq_printf(m, "brightness_levels: %d\n", + HCI_LCD_BRIGHTNESS_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(inode)->data); +} + +static int set_lcd(struct toshiba_acpi_dev *dev, int value) +{ + u32 hci_result; + + 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(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(file->f_path.dentry->d_inode)->data; + char cmd[42]; + size_t len; + int value; + int ret; + + 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 < HCI_LCD_BRIGHTNESS_LEVELS) { + ret = set_lcd(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(inode)->data); +} + +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(file->f_path.dentry->d_inode)->data; + 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(inode)->data); +} + +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(file->f_path.dentry->d_inode)->data; + 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(inode)->data); +} + +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(file->f_path.dentry->d_inode)->data; + 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(inode)->data); +} + +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 __devinit +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 = { + .get_brightness = get_lcd, + .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) +{ + struct acpi_buffer buf; + union acpi_object out_obj; + acpi_status status; + + buf.pointer = &out_obj; + buf.length = sizeof(out_obj); + + status = acpi_evaluate_object(dev->acpi_dev->handle, "INFO", + NULL, &buf); + if (ACPI_FAILURE(status) || out_obj.type != ACPI_TYPE_INTEGER) { + pr_err("ACPI INFO method execution failed\n"); + return -EIO; + } + + return out_obj.integer.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 __devinit toshiba_acpi_setup_keyboard(struct toshiba_acpi_dev *dev) +{ + acpi_status status; + acpi_handle ec_handle, handle; + int error; + u32 hci_result; + + dev->hotkey_dev = input_allocate_device(); + if (!dev->hotkey_dev) { + pr_info("Unable to register input device\n"); + 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) + status = acpi_get_handle(ec_handle, "NTFY", &handle); + + if (ACPI_SUCCESS(status)) { + 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. + */ + status = acpi_get_handle(dev->acpi_dev->handle, "INFO", &handle); + if (ACPI_SUCCESS(status)) { + 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_remove(struct acpi_device *acpi_dev, int type) +{ + 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 * __devinit find_hci_method(acpi_handle handle) +{ + acpi_status status; + acpi_handle hci_handle; + + status = acpi_get_handle(handle, "GHCI", &hci_handle); + if (ACPI_SUCCESS(status)) + return "GHCI"; + + status = acpi_get_handle(handle, "SPFC", &hci_handle); + if (ACPI_SUCCESS(status)) + return "SPFC"; + + return NULL; +} + +static int __devinit 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; + struct backlight_properties props; + + 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); + + props.type = BACKLIGHT_PLATFORM; + props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1; + dev->backlight_dev = backlight_device_register("toshiba", + &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; + goto error; + } + dev->backlight_dev->props.brightness = get_lcd(dev->backlight_dev); + + /* 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, 0); + 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); + } +} + +static int toshiba_acpi_suspend(struct acpi_device *acpi_dev, + pm_message_t state) +{ + struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev); + u32 result; + + if (dev->hotkey_dev) + hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_DISABLE, &result); + + return 0; +} + +static int toshiba_acpi_resume(struct acpi_device *acpi_dev) +{ + struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev); + u32 result; + + if (dev->hotkey_dev) + hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &result); + + return 0; +} + +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, + .suspend = toshiba_acpi_suspend, + .resume = toshiba_acpi_resume, + }, +}; + +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); |