Date:	Mon, 22 Dec 2008 23:36:17 +0100
From:	"Daniel Perzynski" <daniel.perzynski@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	mjg59@...f.ucam.org
Subject: Fwd: HP WMI laptop extras driver

I've tried to load that driver on 2.6.28-rc6 and 2.6.27.4. Both are
giving me that :(

Nov 30 14:27:29 h3xu5 quickstart: Warning: GHID method failed
Nov 30 14:27:29 h3xu5 quickstart: Warning: GHID method failed
Nov 30 14:27:29 h3xu5 quickstart: Warning: GHID method failed
Nov 30 14:27:29 h3xu5 quickstart: Warning: GHID method failed
Nov 30 14:27:29 h3xu5 quickstart: Warning: GHID method failed
Nov 30 14:27:29 h3xu5 quickstart: Warning: GHID method failed
Nov 30 14:27:29 h3xu5 kobject (ffff88013f8e9100): tried to init an
initialized object, something is seriously wrong.
Nov 30 14:27:29 h3xu5 Pid: 3565, comm: modprobe Not tainted 2.6.28-rc6-qp #1
Nov 30 14:27:29 h3xu5 Call Trace:
Nov 30 14:27:29 h3xu5 [<ffffffff8037db0e>] kobject_init+0x9e/0xa0
Nov 30 14:27:29 h3xu5 [<ffffffffa03e2000>] ? quickstart_init+0x0/0x1bd
[quickstart]
Nov 30 14:27:29 h3xu5 [<ffffffff8040579d>] device_initialize+0x2d/0xc0
Nov 30 14:27:29 h3xu5 [<ffffffff8040a055>] platform_device_register+0x15/0x30
Nov 30 14:27:29 h3xu5 [<ffffffffa03e2069>] quickstart_init+0x69/0x1bd
[quickstart]
Nov 30 14:27:29 h3xu5 [<ffffffff8020903b>] _stext+0x3b/0x170
Nov 30 14:27:29 h3xu5 [<ffffffff803d70dc>] ? acpi_bus_register_driver+0x0/0x40
Nov 30 14:27:29 h3xu5 [<ffffffff8026f67d>] sys_init_module+0xad/0x1e0
Nov 30 14:27:29 h3xu5 [<ffffffff8020c3ab>] system_call_fastpath+0x16/0x1b
Nov 30 14:27:29 h3xu5 input: ACPI Quickstart hotkeys as /class/input/input11
Nov 30 14:27:29 h3xu5 quickstart: ACPI Direct App Launch ver 1.00



On Fri, Nov 28, 2008 at 6:19 PM, Matthew Garrett <mjg59@...f.ucam.org> wrote:
> Can you apply the attached patch, build the quickstart driver, load it
> and tell me what messages you get from the quickstart keys on your
> device?
>
> diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
> index b0243fd..94460ea 100644
> --- a/drivers/acpi/Kconfig
> +++ b/drivers/acpi/Kconfig
> @@ -400,4 +400,11 @@ config ACPI_SBS
>          This driver adds support for the Smart Battery System, another
>          type of access to battery information, found on some laptops.
>
> +config ACPI_QUICKSTART
> +       tristate "ACPI Application Quickstart Keys"
> +       depends on INPUT
> +       help
> +         This driver adds support for the PNP0C32 application start keys
> +        found on some laptops.
> +
>  endif  # ACPI
> diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
> index 3c0c933..898ca7b 100644
> --- a/drivers/acpi/Makefile
> +++ b/drivers/acpi/Makefile
> @@ -66,3 +66,4 @@ obj-$(CONFIG_ACPI_HOTPLUG_MEMORY)     += acpi_memhotplug.o
>  obj-$(CONFIG_ACPI_PROCFS_POWER)        += cm_sbs.o
>  obj-$(CONFIG_ACPI_SBS)         += sbshc.o
>  obj-$(CONFIG_ACPI_SBS)         += sbs.o
> +obj-$(CONFIG_ACPI_QUICKSTART)  += quickstart.o
> diff --git a/drivers/acpi/quickstart.c b/drivers/acpi/quickstart.c
> new file mode 100644
> index 0000000..2abbeb0
> --- /dev/null
> +++ b/drivers/acpi/quickstart.c
> @@ -0,0 +1,507 @@
> +/*
> + *  quickstart.c - ACPI Direct App Launch driver
> + *
> + *  Copyright (C) 2007 Angelo Arrifano <miknix@...il.com>
> + *
> + *  Information gathered from disassebled dsdt and from here:
> + *  "http://download.microsoft.com/download/9/c/5/
> + *  9c5b2167-8017-4bae-9fde-d599bac8184a/DirAppLaunch_Vista.doc"
> + *
> + *  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
> + *
> + */
> +
> +#define QUICKSTART_VERSION "1.00"
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/types.h>
> +#include <acpi/acpi_drivers.h>
> +#include <linux/platform_device.h>
> +#include <linux/input.h>
> +
> +MODULE_AUTHOR("Angelo Arrifano");
> +MODULE_DESCRIPTION("ACPI Direct App Launch driver");
> +MODULE_LICENSE("GPL");
> +
> +#define QUICKSTART_ACPI_DEVICE_NAME   "quickstart"
> +#define QUICKSTART_ACPI_CLASS         "quickstart"
> +#define QUICKSTART_ACPI_HID           "PNP0C32"
> +
> +#define QUICKSTART_PF_DRIVER_NAME     "quickstart"
> +#define QUICKSTART_PF_DEVICE_NAME     "quickstart"
> +#define QUICKSTART_PF_DEVATTR_NAME    "pressed_button"
> +
> +#define QUICKSTART_MAX_BTN_NAME_LEN   16
> +
> +struct quickstart_btn_list {
> +       char *name;
> +       struct quickstart_btn_list *next;
> +};
> +
> +static struct quickstart_driver_data {
> +       struct quickstart_btn_list *btn_lst;
> +       struct quickstart_btn_list *pressed;
> +} quickstart_data = {
> +.btn_lst = NULL,.pressed = NULL,};
> +
> +static struct input_dev *quickstart_input_dev;
> +
> +/*
> + * ACPI driver Structs
> + */
> +
> +struct quickstart_acpi {
> +       struct acpi_device *device;
> +       struct quickstart_btn_list *btn;
> +};
> +static int quickstart_acpi_add(struct acpi_device *device);
> +static int quickstart_acpi_remove(struct acpi_device *device, int type);
> +static const struct acpi_device_id quickstart_device_ids[] = {
> +       {QUICKSTART_ACPI_HID, 0},
> +       {"", 0},
> +};
> +
> +static struct acpi_driver quickstart_acpi_driver = {
> +       .name = "quickstart",
> +       .class = QUICKSTART_ACPI_CLASS,
> +       .ids = quickstart_device_ids,
> +       .ops = {
> +               .add = quickstart_acpi_add,
> +               .remove = quickstart_acpi_remove,
> +               },
> +};
> +
> +/*
> + * Platform driver structs
> + */
> +static ssize_t buttons_show(struct device *dev,
> +                           struct device_attribute *attr, char *buf);
> +static ssize_t pressed_button_show(struct device *dev,
> +                                  struct device_attribute *attr, char *buf);
> +static ssize_t pressed_button_store(struct device *dev,
> +                                   struct device_attribute *attr,
> +                                   const char *buf, size_t count);
> +static DEVICE_ATTR(pressed_button, 0666, pressed_button_show,
> +                  pressed_button_store);
> +static DEVICE_ATTR(buttons, 0444, buttons_show, NULL);
> +static struct platform_device *pf_device;
> +static struct platform_driver pf_driver = {
> +       .driver = {
> +                  .name = QUICKSTART_PF_DRIVER_NAME,
> +                  .owner = THIS_MODULE,
> +                  }
> +};
> +
> +struct key_entry {
> +        char type;              /* See KE_* below */
> +        u32 code;
> +        u16 keycode;
> +};
> +
> +enum { KE_KEY, KE_END };
> +
> +static struct key_entry quickstart_keymap[] = {
> +       {KE_END, 0}
> +};
> +
> +static struct key_entry *quickstart_get_entry_by_scancode(int code)
> +{
> +        struct key_entry *key;
> +
> +        for (key = quickstart_keymap; key->type != KE_END; key++)
> +                if (code == key->code)
> +                        return key;
> +
> +        return NULL;
> +}
> +
> +static struct key_entry *quickstart_get_entry_by_keycode(int keycode)
> +{
> +        struct key_entry *key;
> +
> +        for (key = quickstart_keymap; key->type != KE_END; key++)
> +                if (key->type == KE_KEY && keycode == key->keycode)
> +                        return key;
> +
> +        return NULL;
> +}
> +
> +static int quickstart_getkeycode(struct input_dev *dev, int scancode,
> +                                int *keycode)
> +{
> +        struct key_entry *key = quickstart_get_entry_by_scancode(scancode);
> +
> +        if (key && key->type == KE_KEY) {
> +                *keycode = key->keycode;
> +                return 0;
> +        }
> +
> +        return -EINVAL;
> +}
> +
> +static int quickstart_setkeycode(struct input_dev *dev, int scancode,
> +                                int keycode)
> +{
> +        struct key_entry *key;
> +        int old_keycode;
> +
> +        if (keycode < 0 || keycode > KEY_MAX)
> +                return -EINVAL;
> +
> +        key = quickstart_get_entry_by_scancode(scancode);
> +        if (key && key->type == KE_KEY) {
> +                old_keycode = key->keycode;
> +                key->keycode = keycode;
> +                set_bit(keycode, dev->keybit);
> +                if (!quickstart_get_entry_by_keycode(old_keycode))
> +                        clear_bit(old_keycode, dev->keybit);
> +                return 0;
> +        }
> +
> +        return -EINVAL;
> +}
> +
> +/*
> + * Platform driver functions
> + */
> +static ssize_t buttons_show(struct device *dev,
> +                           struct device_attribute *attr, char *buf)
> +{
> +       int count = 0;
> +       char tmpbuf[QUICKSTART_MAX_BTN_NAME_LEN + 2];
> +       struct quickstart_btn_list *ptr = quickstart_data.btn_lst;
> +
> +       if (!ptr)
> +               return snprintf(buf, PAGE_SIZE, "none");
> +
> +       while (ptr && (count < PAGE_SIZE)) {
> +               if (ptr->name) {
> +                       strncpy(tmpbuf, ptr->name, QUICKSTART_MAX_BTN_NAME_LEN);
> +                       strcat(tmpbuf, "\n");
> +                       count += snprintf(buf + count,
> +                                         PAGE_SIZE - count, tmpbuf);
> +               }
> +               ptr = ptr->next;
> +       }
> +
> +       return count;
> +}
> +
> +static ssize_t pressed_button_show(struct device *dev,
> +                                  struct device_attribute *attr, char *buf)
> +{
> +       return snprintf(buf, PAGE_SIZE, "%s\n",
> +                       (quickstart_data.pressed ? quickstart_data.pressed->
> +                        name : "none"));
> +}
> +
> +static ssize_t pressed_button_store(struct device *dev,
> +                                   struct device_attribute *attr,
> +                                   const char *buf, size_t count)
> +{
> +       if (count < 2)
> +               return -EINVAL;
> +
> +       if (strncasecmp(buf, "none", 4) != 0)
> +               return -EINVAL;
> +
> +       quickstart_data.pressed = NULL;
> +       return count;
> +}
> +
> +/* Hotstart Helper functions */
> +static int quickstart_btnlst_add(struct quickstart_btn_list **data)
> +{
> +       struct quickstart_btn_list **ptr = &quickstart_data.btn_lst;
> +
> +       while (*ptr)
> +               ptr = &((*ptr)->next);
> +
> +       *ptr = kzalloc(sizeof(struct quickstart_btn_list), GFP_KERNEL);
> +       if (!*ptr) {
> +               *data = NULL;
> +               return (-ENOMEM);
> +       }
> +       *data = *ptr;
> +
> +       return 0;
> +}
> +
> +static void quickstart_btnlst_free(void)
> +{
> +       struct quickstart_btn_list *ptr = quickstart_data.btn_lst;
> +       struct quickstart_btn_list *lptr = NULL;
> +
> +       if (!ptr)
> +               return;
> +
> +       while (ptr) {
> +               lptr = ptr;
> +               ptr = ptr->next;
> +               if (lptr->name)
> +                       kfree(lptr->name);
> +               kfree(lptr);
> +       }
> +
> +       return;
> +}
> +
> +static void quickstart_acpi_get_event(struct quickstart_acpi *quickstart,
> +       unsigned long long *button)
> +{
> +       acpi_status status;
> +
> +       status = acpi_evaluate_integer(quickstart->device->handle,
> +                                     "GHID", NULL, button);
> +       if (ACPI_FAILURE(status))
> +               printk (KERN_WARNING
> +                       "quickstart: Warning: GHID method failed\n");
> +
> +       return;
> +}
> +
> +/* ACPI Driver functions */
> +static void quickstart_acpi_notify(acpi_handle handle, u32 event, void *data)
> +{
> +       struct quickstart_acpi *quickstart = data;
> +       struct key_entry *key;
> +       unsigned long long button;
> +
> +       if (!quickstart)
> +               return;
> +
> +       /* There will be two events:
> +        * 0x02 - A quickstart button was pressed while device was off/sleeping.
> +        * 0x80 - A quickstart button was pressed while device was up. */
> +       if (event & 0x02)
> +               quickstart_data.pressed = quickstart->btn;
> +
> +       quickstart_acpi_get_event(quickstart, &button);
> +
> +       key = quickstart_get_entry_by_scancode(button);
> +
> +       if (!key)
> +               printk(KERN_INFO "Quickstart: Unknown key pressed - 0x%llx\n",
> +                      button);
> +
> +       input_report_key(quickstart_input_dev, key->keycode, 1);
> +       input_sync(quickstart_input_dev);
> +       input_report_key(quickstart_input_dev, key->keycode, 0);
> +       input_sync(quickstart_input_dev);
> +
> +       return;
> +}
> +
> +static int quickstart_acpi_config(struct quickstart_acpi *quickstart, char *bid)
> +{
> +       int len = strlen(bid);
> +       int ret;
> +
> +       /* Add button to list */
> +       ret = quickstart_btnlst_add(&quickstart->btn);
> +       if (ret)
> +               return ret;
> +
> +       quickstart->btn->name = kzalloc(len + 1, GFP_KERNEL);
> +       if (!quickstart->btn->name) {
> +               quickstart_btnlst_free();
> +               return -ENOMEM;
> +       }
> +       strcpy(quickstart->btn->name, bid);
> +
> +       return 0;
> +}
> +
> +static int quickstart_acpi_add(struct acpi_device *device)
> +{
> +       int ret = 0;
> +       acpi_status status = AE_OK;
> +       struct quickstart_acpi *quickstart = NULL;
> +
> +       if (!device)
> +               return -EINVAL;
> +
> +       quickstart = kzalloc(sizeof(struct quickstart_acpi), GFP_KERNEL);
> +       if (!quickstart)
> +               return -ENOMEM;
> +
> +       quickstart->device = device;
> +       strcpy(acpi_device_name(device), QUICKSTART_ACPI_DEVICE_NAME);
> +       strcpy(acpi_device_class(device), QUICKSTART_ACPI_CLASS);
> +       device->driver_data = quickstart;
> +
> +       /* Add button to list and initialize some stuff */
> +       ret = quickstart_acpi_config(quickstart, acpi_device_bid(device));
> +       if (ret)
> +               goto fail_config;
> +
> +       status = acpi_install_notify_handler(device->handle,
> +                                            ACPI_ALL_NOTIFY,
> +                                            quickstart_acpi_notify,
> +                                            quickstart);
> +       if (ACPI_FAILURE(status)) {
> +               printk("quickstart: Error installing notify handler\n");
> +               ret = -ENODEV;
> +               goto fail_installnotify;
> +       }
> +
> +       /* Call device GHID method. This is a workaround to get a notify
> +        * event when hot button is pressed while laptop is powered off.
> +        * This works, even if the method fails. */
> +       quickstart_acpi_get_event(quickstart, NULL);
> +
> +       return 0;
> +
> +fail_installnotify:
> +fail_config:
> +
> +       kfree(quickstart);
> +
> +       return ret;
> +}
> +
> +static int quickstart_acpi_remove(struct acpi_device *device, int type)
> +{
> +       acpi_status status = 0;
> +       struct quickstart_acpi *quickstart = NULL;
> +
> +       if (!device || !acpi_driver_data(device))
> +               return -EINVAL;
> +
> +       quickstart = acpi_driver_data(device);
> +
> +       status = acpi_remove_notify_handler(device->handle,
> +                                           ACPI_ALL_NOTIFY,
> +                                           quickstart_acpi_notify);
> +       if (ACPI_FAILURE(status))
> +               printk("quickstart: Error removing notify handler\n");
> +
> +       kfree(quickstart);
> +
> +       return 0;
> +}
> +
> +/* Module functions */
> +
> +static void quickstart_exit(void)
> +{
> +       device_remove_file(&pf_device->dev, &dev_attr_pressed_button);
> +       device_remove_file(&pf_device->dev, &dev_attr_buttons);
> +
> +       input_unregister_device(quickstart_input_dev);
> +
> +       platform_device_unregister(pf_device);
> +
> +       platform_driver_unregister(&pf_driver);
> +
> +       acpi_bus_unregister_driver(&quickstart_acpi_driver);
> +
> +       quickstart_btnlst_free();
> +
> +       return;
> +}
> +
> +static int __init quickstart_init(void)
> +{
> +       int ret;
> +       acpi_status status = 0;
> +       struct key_entry *key;
> +
> +       /* ACPI Check */
> +       if (acpi_disabled)
> +               return -ENODEV;
> +
> +       /* ACPI driver register */
> +       status = acpi_bus_register_driver(&quickstart_acpi_driver);
> +       if (status < 0)
> +               return -ENODEV;
> +
> +       /* Platform driver register */
> +       ret = platform_driver_register(&pf_driver);
> +       if (ret)
> +               goto fail_pfdrv_reg;
> +
> +       /* Platform device register */
> +       pf_device = platform_device_alloc(QUICKSTART_PF_DEVICE_NAME, -1);
> +       if (!pf_device) {
> +               ret = -ENOMEM;
> +               goto fail_pfdev_alloc;
> +       }
> +
> +       ret = platform_device_register(pf_device);
> +       if (ret)
> +               goto fail_pfdev_reg;
> +
> +       /* Create device sysfs file */
> +       ret = device_create_file(&pf_device->dev, &dev_attr_pressed_button);
> +       if (ret)
> +               goto fail_dev_file;
> +
> +       ret = device_create_file(&pf_device->dev, &dev_attr_buttons);
> +       if (ret)
> +               goto fail_dev_file2;
> +
> +       quickstart_input_dev = input_allocate_device();
> +       if (!quickstart_input_dev)
> +               goto fail_input_alloc;
> +
> +       quickstart_input_dev->name = "ACPI Quickstart hotkeys";
> +       quickstart_input_dev->phys = "quickstart/input0";
> +       quickstart_input_dev->id.bustype = BUS_HOST;
> +       quickstart_input_dev->getkeycode = quickstart_getkeycode;
> +       quickstart_input_dev->setkeycode = quickstart_setkeycode;
> +
> +       for (key = quickstart_keymap; key->type != KE_END; key++) {
> +               set_bit(EV_KEY, quickstart_input_dev->evbit);
> +               set_bit(key->keycode, quickstart_input_dev->evbit);
> +       }
> +
> +       ret = input_register_device(quickstart_input_dev);
> +       if (ret)
> +               goto fail_input_register;
> +
> +       printk("quickstart: ACPI Direct App Launch ver %s\n",
> +              QUICKSTART_VERSION);
> +
> +       return 0;
> +
> +fail_input_register:
> +       input_free_device(quickstart_input_dev);
> +
> +fail_input_alloc:
> +       device_remove_file(&pf_device->dev, &dev_attr_buttons);
> +
> +fail_dev_file2:
> +       device_remove_file(&pf_device->dev, &dev_attr_pressed_button);
> +
> +fail_dev_file:
> +       platform_device_del(pf_device);
> +
> +fail_pfdev_reg:
> +       platform_device_put(pf_device);
> +
> +fail_pfdev_alloc:
> +       platform_driver_unregister(&pf_driver);
> +
> +fail_pfdrv_reg:
> +       acpi_bus_unregister_driver(&quickstart_acpi_driver);
> +
> +       return ret;
> +}
> +
> +module_init(quickstart_init);
> +module_exit(quickstart_exit);
>
> --
> Matthew Garrett | mjg59@...f.ucam.org
>
Can someone help me with the fix to that patch?
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