ACPI: move wmi, asus_acpi, toshiba_acpi to drivers/platform/x86

These are platform specific drivers that happen to use ACPI,
while drivers/acpi/ is for code that implements ACPI itself.

Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 863 insertions, 0 deletions

diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
new file mode 100644
index 000000000000..40e60fc2e596
--- /dev/null
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -0,0 +1,863 @@
+/*
+ *  toshiba_acpi.c - Toshiba Laptop ACPI Extras
+ *
+ *
+ *  Copyright (C) 2002-2004 John Belmonte
+ *  Copyright (C) 2008 Philip Langdale
+ *
+ *  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 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/backlight.h>
+#include <linux/platform_device.h>
+#include <linux/rfkill.h>
+#include <linux/input-polldev.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 MY_LOGPREFIX "toshiba_acpi: "
+#define MY_ERR KERN_ERR MY_LOGPREFIX
+#define MY_NOTICE KERN_NOTICE MY_LOGPREFIX
+#define MY_INFO KERN_INFO MY_LOGPREFIX
+
+/* Toshiba ACPI method paths */
+#define METHOD_LCD_BRIGHTNESS   "\\_SB_.PCI0.VGA_.LCD_._BCM"
+#define METHOD_HCI_1            "\\_SB_.VALD.GHCI"
+#define METHOD_HCI_2            "\\_SB_.VALZ.GHCI"
+#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_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
+
+static const struct acpi_device_id toshiba_device_ids[] = {
+        {"TOS6200", 0},
+        {"TOS6208", 0},
+        {"TOS1900", 0},
+        {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, toshiba_device_ids);
+
+/* utility
+ */
+
+static __inline__ void _set_bit(u32 * word, u32 mask, int value)
+{
+        *word = (*word & ~mask) | (mask * value);
+}
+
+/* acpi interface wrappers
+ */
+
+static int is_valid_acpi_path(const char *methodName)
+{
+        acpi_handle handle;
+        acpi_status status;
+
+        status = acpi_get_handle(NULL, (char *)methodName, &handle);
+        return !ACPI_FAILURE(status);
+}
+
+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, &params, NULL);
+        return (status == AE_OK);
+}
+
+#if 0
+static int read_acpi_int(const char *methodName, int *pVal)
+{
+        struct acpi_buffer results;
+        union acpi_object out_objs[1];
+        acpi_status status;
+
+        results.length = sizeof(out_objs);
+        results.pointer = out_objs;
+
+        status = acpi_evaluate_object(0, (char *)methodName, 0, &results);
+        *pVal = out_objs[0].integer.value;
+
+        return (status == AE_OK) && (out_objs[0].type == ACPI_TYPE_INTEGER);
+}
+#endif
+
+static const char *method_hci /*= 0*/ ;
+
+/* Perform a raw HCI call.  Here we don't care about input or output buffer
+ * format.
+ */
+static acpi_status hci_raw(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(NULL, (char *)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(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(in, out);
+        *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
+        return status;
+}
+
+static acpi_status hci_read1(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(in, out);
+        *out1 = out[2];
+        *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
+        return status;
+}
+
+static acpi_status hci_write2(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(in, out);
+        *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
+        return status;
+}
+
+static acpi_status hci_read2(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(in, out);
+        *out1 = out[2];
+        *out2 = out[3];
+        *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
+        return status;
+}
+
+struct toshiba_acpi_dev {
+        struct platform_device *p_dev;
+        struct rfkill *rfk_dev;
+        struct input_polled_dev *poll_dev;
+
+        const char *bt_name;
+        const char *rfk_name;
+
+        bool last_rfk_state;
+
+        struct mutex mutex;
+};
+
+static struct toshiba_acpi_dev toshiba_acpi = {
+        .bt_name = "Toshiba Bluetooth",
+        .rfk_name = "Toshiba RFKill Switch",
+        .last_rfk_state = false,
+};
+
+/* Bluetooth rfkill handlers */
+
+static u32 hci_get_bt_present(bool *present)
+{
+        u32 hci_result;
+        u32 value, value2;
+
+        value = 0;
+        value2 = 0;
+        hci_read2(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_bt_on(bool *on)
+{
+        u32 hci_result;
+        u32 value, value2;
+
+        value = 0;
+        value2 = 0x0001;
+        hci_read2(HCI_WIRELESS, &value, &value2, &hci_result);
+        if (hci_result == HCI_SUCCESS)
+                *on = (value & HCI_WIRELESS_BT_POWER) &&
+                      (value & HCI_WIRELESS_BT_ATTACH);
+
+        return hci_result;
+}
+
+static u32 hci_get_radio_state(bool *radio_state)
+{
+        u32 hci_result;
+        u32 value, value2;
+
+        value = 0;
+        value2 = 0x0001;
+        hci_read2(HCI_WIRELESS, &value, &value2, &hci_result);
+
+        *radio_state = value & HCI_WIRELESS_KILL_SWITCH;
+        return hci_result;
+}
+
+static int bt_rfkill_toggle_radio(void *data, enum rfkill_state state)
+{
+        u32 result1, result2;
+        u32 value;
+        bool radio_state;
+        struct toshiba_acpi_dev *dev = data;
+
+        value = (state == RFKILL_STATE_UNBLOCKED);
+
+        if (hci_get_radio_state(&radio_state) != HCI_SUCCESS)
+                return -EFAULT;
+
+        switch (state) {
+        case RFKILL_STATE_UNBLOCKED:
+                if (!radio_state)
+                        return -EPERM;
+                break;
+        case RFKILL_STATE_SOFT_BLOCKED:
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        mutex_lock(&dev->mutex);
+        hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1);
+        hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2);
+        mutex_unlock(&dev->mutex);
+
+        if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS)
+                return -EFAULT;
+
+        return 0;
+}
+
+static void bt_poll_rfkill(struct input_polled_dev *poll_dev)
+{
+        bool state_changed;
+        bool new_rfk_state;
+        bool value;
+        u32 hci_result;
+        struct toshiba_acpi_dev *dev = poll_dev->private;
+
+        hci_result = hci_get_radio_state(&value);
+        if (hci_result != HCI_SUCCESS)
+                return; /* Can't do anything useful */
+
+        new_rfk_state = value;
+
+        mutex_lock(&dev->mutex);
+        state_changed = new_rfk_state != dev->last_rfk_state;
+        dev->last_rfk_state = new_rfk_state;
+        mutex_unlock(&dev->mutex);
+
+        if (unlikely(state_changed)) {
+                rfkill_force_state(dev->rfk_dev,
+                                   new_rfk_state ?
+                                   RFKILL_STATE_SOFT_BLOCKED :
+                                   RFKILL_STATE_HARD_BLOCKED);
+                input_report_switch(poll_dev->input, SW_RFKILL_ALL,
+                                    new_rfk_state);
+                input_sync(poll_dev->input);
+        }
+}
+
+static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ;
+static struct backlight_device *toshiba_backlight_device;
+static int force_fan;
+static int last_key_event;
+static int key_event_valid;
+
+typedef struct _ProcItem {
+        const char *name;
+        char *(*read_func) (char *);
+        unsigned long (*write_func) (const char *, unsigned long);
+} ProcItem;
+
+/* proc file handlers
+ */
+
+static int
+dispatch_read(char *page, char **start, off_t off, int count, int *eof,
+              ProcItem * item)
+{
+        char *p = page;
+        int len;
+
+        if (off == 0)
+                p = item->read_func(p);
+
+        /* ISSUE: I don't understand this code */
+        len = (p - page);
+        if (len <= off + count)
+                *eof = 1;
+        *start = page + off;
+        len -= off;
+        if (len > count)
+                len = count;
+        if (len < 0)
+                len = 0;
+        return len;
+}
+
+static int
+dispatch_write(struct file *file, const char __user * buffer,
+               unsigned long count, ProcItem * item)
+{
+        int result;
+        char *tmp_buffer;
+
+        /* Arg buffer points to userspace memory, which can't be accessed
+         * directly.  Since we're making a copy, zero-terminate the
+         * destination so that sscanf can be used on it safely.
+         */
+        tmp_buffer = kmalloc(count + 1, GFP_KERNEL);
+        if (!tmp_buffer)
+                return -ENOMEM;
+
+        if (copy_from_user(tmp_buffer, buffer, count)) {
+                result = -EFAULT;
+        } else {
+                tmp_buffer[count] = 0;
+                result = item->write_func(tmp_buffer, count);
+        }
+        kfree(tmp_buffer);
+        return result;
+}
+
+static int get_lcd(struct backlight_device *bd)
+{
+        u32 hci_result;
+        u32 value;
+
+        hci_read1(HCI_LCD_BRIGHTNESS, &value, &hci_result);
+        if (hci_result == HCI_SUCCESS) {
+                return (value >> HCI_LCD_BRIGHTNESS_SHIFT);
+        } else
+                return -EFAULT;
+}
+
+static char *read_lcd(char *p)
+{
+        int value = get_lcd(NULL);
+
+        if (value >= 0) {
+                p += sprintf(p, "brightness:              %d\n", value);
+                p += sprintf(p, "brightness_levels:       %d\n",
+                             HCI_LCD_BRIGHTNESS_LEVELS);
+        } else {
+                printk(MY_ERR "Error reading LCD brightness\n");
+        }
+
+        return p;
+}
+
+static int set_lcd(int value)
+{
+        u32 hci_result;
+
+        value = value << HCI_LCD_BRIGHTNESS_SHIFT;
+        hci_write1(HCI_LCD_BRIGHTNESS, value, &hci_result);
+        if (hci_result != HCI_SUCCESS)
+                return -EFAULT;
+
+        return 0;
+}
+
+static int set_lcd_status(struct backlight_device *bd)
+{
+        return set_lcd(bd->props.brightness);
+}
+
+static unsigned long write_lcd(const char *buffer, unsigned long count)
+{
+        int value;
+        int ret;
+
+        if (sscanf(buffer, " brightness : %i", &value) == 1 &&
+            value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) {
+                ret = set_lcd(value);
+                if (ret == 0)
+                        ret = count;
+        } else {
+                ret = -EINVAL;
+        }
+        return ret;
+}
+
+static char *read_video(char *p)
+{
+        u32 hci_result;
+        u32 value;
+
+        hci_read1(HCI_VIDEO_OUT, &value, &hci_result);
+        if (hci_result == HCI_SUCCESS) {
+                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;
+                p += sprintf(p, "lcd_out:                 %d\n", is_lcd);
+                p += sprintf(p, "crt_out:                 %d\n", is_crt);
+                p += sprintf(p, "tv_out:                  %d\n", is_tv);
+        } else {
+                printk(MY_ERR "Error reading video out status\n");
+        }
+
+        return p;
+}
+
+static unsigned long write_video(const char *buffer, unsigned long count)
+{
+        int value;
+        int remain = count;
+        int lcd_out = -1;
+        int crt_out = -1;
+        int tv_out = -1;
+        u32 hci_result;
+        u32 video_out;
+
+        /* 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) != ';');
+        }
+
+        hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result);
+        if (hci_result == HCI_SUCCESS) {
+                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)
+                        write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
+        } else {
+                return -EFAULT;
+        }
+
+        return count;
+}
+
+static char *read_fan(char *p)
+{
+        u32 hci_result;
+        u32 value;
+
+        hci_read1(HCI_FAN, &value, &hci_result);
+        if (hci_result == HCI_SUCCESS) {
+                p += sprintf(p, "running:                 %d\n", (value > 0));
+                p += sprintf(p, "force_on:                %d\n", force_fan);
+        } else {
+                printk(MY_ERR "Error reading fan status\n");
+        }
+
+        return p;
+}
+
+static unsigned long write_fan(const char *buffer, unsigned long count)
+{
+        int value;
+        u32 hci_result;
+
+        if (sscanf(buffer, " force_on : %i", &value) == 1 &&
+            value >= 0 && value <= 1) {
+                hci_write1(HCI_FAN, value, &hci_result);
+                if (hci_result != HCI_SUCCESS)
+                        return -EFAULT;
+                else
+                        force_fan = value;
+        } else {
+                return -EINVAL;
+        }
+
+        return count;
+}
+
+static char *read_keys(char *p)
+{
+        u32 hci_result;
+        u32 value;
+
+        if (!key_event_valid) {
+                hci_read1(HCI_SYSTEM_EVENT, &value, &hci_result);
+                if (hci_result == HCI_SUCCESS) {
+                        key_event_valid = 1;
+                        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(HCI_SYSTEM_EVENT, 1, &hci_result);
+                        printk(MY_NOTICE "Re-enabled hotkeys\n");
+                } else {
+                        printk(MY_ERR "Error reading hotkey status\n");
+                        goto end;
+                }
+        }
+
+        p += sprintf(p, "hotkey_ready:            %d\n", key_event_valid);
+        p += sprintf(p, "hotkey:                  0x%04x\n", last_key_event);
+
+      end:
+        return p;
+}
+
+static unsigned long write_keys(const char *buffer, unsigned long count)
+{
+        int value;
+
+        if (sscanf(buffer, " hotkey_ready : %i", &value) == 1 && value == 0) {
+                key_event_valid = 0;
+        } else {
+                return -EINVAL;
+        }
+
+        return count;
+}
+
+static char *read_version(char *p)
+{
+        p += sprintf(p, "driver:                  %s\n", TOSHIBA_ACPI_VERSION);
+        p += sprintf(p, "proc_interface:          %d\n",
+                     PROC_INTERFACE_VERSION);
+        return p;
+}
+
+/* proc and module init
+ */
+
+#define PROC_TOSHIBA            "toshiba"
+
+static ProcItem proc_items[] = {
+        {"lcd", read_lcd, write_lcd},
+        {"video", read_video, write_video},
+        {"fan", read_fan, write_fan},
+        {"keys", read_keys, write_keys},
+        {"version", read_version, NULL},
+        {NULL}
+};
+
+static acpi_status __init add_device(void)
+{
+        struct proc_dir_entry *proc;
+        ProcItem *item;
+
+        for (item = proc_items; item->name; ++item) {
+                proc = create_proc_read_entry(item->name,
+                                              S_IFREG | S_IRUGO | S_IWUSR,
+                                              toshiba_proc_dir,
+                                              (read_proc_t *) dispatch_read,
+                                              item);
+                if (proc)
+                        proc->owner = THIS_MODULE;
+                if (proc && item->write_func)
+                        proc->write_proc = (write_proc_t *) dispatch_write;
+        }
+
+        return AE_OK;
+}
+
+static acpi_status remove_device(void)
+{
+        ProcItem *item;
+
+        for (item = proc_items; item->name; ++item)
+                remove_proc_entry(item->name, toshiba_proc_dir);
+        return AE_OK;
+}
+
+static struct backlight_ops toshiba_backlight_data = {
+        .get_brightness = get_lcd,
+        .update_status  = set_lcd_status,
+};
+
+static void toshiba_acpi_exit(void)
+{
+        if (toshiba_acpi.poll_dev) {
+                input_unregister_polled_device(toshiba_acpi.poll_dev);
+                input_free_polled_device(toshiba_acpi.poll_dev);
+        }
+
+        if (toshiba_acpi.rfk_dev)
+                rfkill_unregister(toshiba_acpi.rfk_dev);
+
+        if (toshiba_backlight_device)
+                backlight_device_unregister(toshiba_backlight_device);
+
+        remove_device();
+
+        if (toshiba_proc_dir)
+                remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
+
+        platform_device_unregister(toshiba_acpi.p_dev);
+
+        return;
+}
+
+static int __init toshiba_acpi_init(void)
+{
+        acpi_status status = AE_OK;
+        u32 hci_result;
+        bool bt_present;
+        bool bt_on;
+        bool radio_on;
+        int ret = 0;
+
+        if (acpi_disabled)
+                return -ENODEV;
+
+        /* simple device detection: look for HCI method */
+        if (is_valid_acpi_path(METHOD_HCI_1))
+                method_hci = METHOD_HCI_1;
+        else if (is_valid_acpi_path(METHOD_HCI_2))
+                method_hci = METHOD_HCI_2;
+        else
+                return -ENODEV;
+
+        printk(MY_INFO "Toshiba Laptop ACPI Extras version %s\n",
+               TOSHIBA_ACPI_VERSION);
+        printk(MY_INFO "    HCI method: %s\n", method_hci);
+
+        mutex_init(&toshiba_acpi.mutex);
+
+        toshiba_acpi.p_dev = platform_device_register_simple("toshiba_acpi",
+                                                              -1, NULL, 0);
+        if (IS_ERR(toshiba_acpi.p_dev)) {
+                ret = PTR_ERR(toshiba_acpi.p_dev);
+                printk(MY_ERR "unable to register platform device\n");
+                toshiba_acpi.p_dev = NULL;
+                toshiba_acpi_exit();
+                return ret;
+        }
+
+        force_fan = 0;
+        key_event_valid = 0;
+
+        /* enable event fifo */
+        hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result);
+
+        toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
+        if (!toshiba_proc_dir) {
+                toshiba_acpi_exit();
+                return -ENODEV;
+        } else {
+                toshiba_proc_dir->owner = THIS_MODULE;
+                status = add_device();
+                if (ACPI_FAILURE(status)) {
+                        toshiba_acpi_exit();
+                        return -ENODEV;
+                }
+        }
+
+        toshiba_backlight_device = backlight_device_register("toshiba",
+                                                &toshiba_acpi.p_dev->dev,
+                                                NULL,
+                                                &toshiba_backlight_data);
+        if (IS_ERR(toshiba_backlight_device)) {
+                ret = PTR_ERR(toshiba_backlight_device);
+
+                printk(KERN_ERR "Could not register toshiba backlight device\n");
+                toshiba_backlight_device = NULL;
+                toshiba_acpi_exit();
+                return ret;
+        }
+        toshiba_backlight_device->props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
+
+        /* Register rfkill switch for Bluetooth */
+        if (hci_get_bt_present(&bt_present) == HCI_SUCCESS && bt_present) {
+                toshiba_acpi.rfk_dev = rfkill_allocate(&toshiba_acpi.p_dev->dev,
+                                                        RFKILL_TYPE_BLUETOOTH);
+                if (!toshiba_acpi.rfk_dev) {
+                        printk(MY_ERR "unable to allocate rfkill device\n");
+                        toshiba_acpi_exit();
+                        return -ENOMEM;
+                }
+
+                toshiba_acpi.rfk_dev->name = toshiba_acpi.bt_name;
+                toshiba_acpi.rfk_dev->toggle_radio = bt_rfkill_toggle_radio;
+                toshiba_acpi.rfk_dev->user_claim_unsupported = 1;
+                toshiba_acpi.rfk_dev->data = &toshiba_acpi;
+
+                if (hci_get_bt_on(&bt_on) == HCI_SUCCESS && bt_on) {
+                        toshiba_acpi.rfk_dev->state = RFKILL_STATE_UNBLOCKED;
+                } else if (hci_get_radio_state(&radio_on) == HCI_SUCCESS &&
+                           radio_on) {
+                        toshiba_acpi.rfk_dev->state = RFKILL_STATE_SOFT_BLOCKED;
+                } else {
+                        toshiba_acpi.rfk_dev->state = RFKILL_STATE_HARD_BLOCKED;
+                }
+
+                ret = rfkill_register(toshiba_acpi.rfk_dev);
+                if (ret) {
+                        printk(MY_ERR "unable to register rfkill device\n");
+                        toshiba_acpi_exit();
+                        return -ENOMEM;
+                }
+
+                /* Register input device for kill switch */
+                toshiba_acpi.poll_dev = input_allocate_polled_device();
+                if (!toshiba_acpi.poll_dev) {
+                        printk(MY_ERR
+                               "unable to allocate kill-switch input device\n");
+                        toshiba_acpi_exit();
+                        return -ENOMEM;
+                }
+                toshiba_acpi.poll_dev->private = &toshiba_acpi;
+                toshiba_acpi.poll_dev->poll = bt_poll_rfkill;
+                toshiba_acpi.poll_dev->poll_interval = 1000; /* msecs */
+
+                toshiba_acpi.poll_dev->input->name = toshiba_acpi.rfk_name;
+                toshiba_acpi.poll_dev->input->id.bustype = BUS_HOST;
+                /* Toshiba USB ID */
+                toshiba_acpi.poll_dev->input->id.vendor = 0x0930;
+                set_bit(EV_SW, toshiba_acpi.poll_dev->input->evbit);
+                set_bit(SW_RFKILL_ALL, toshiba_acpi.poll_dev->input->swbit);
+                input_report_switch(toshiba_acpi.poll_dev->input,
+                                    SW_RFKILL_ALL, TRUE);
+                input_sync(toshiba_acpi.poll_dev->input);
+
+                ret = input_register_polled_device(toshiba_acpi.poll_dev);
+                if (ret) {
+                        printk(MY_ERR
+                               "unable to register kill-switch input device\n");
+                        toshiba_acpi_exit();
+                        return ret;
+                }
+        }
+
+        return 0;
+}
+
+module_init(toshiba_acpi_init);
+module_exit(toshiba_acpi_exit);