Commit bff589be authored by Andy Lutomirski's avatar Andy Lutomirski Committed by Darren Hart (VMware)

platform/x86: dell-wmi: Convert to the WMI bus infrastructure

Move some initialization out of _init and into _probe.
Update signatures and logic to use the wmi bus and device structures.
Signed-off-by: default avatarAndy Lutomirski <luto@kernel.org>
[dvhart: drop deprecated sparse_keymap_free, order declarations, add commit msg]
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Mario Limonciello <mario_limonciello@dell.com>
Cc: Pali Rohár <pali.rohar@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: platform-driver-x86@vger.kernel.org
Cc: linux-acpi@vger.kernel.org
Acked-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: default avatarDarren Hart (VMware) <dvhart@infradead.org>
parent f9dd82c0
...@@ -36,6 +36,7 @@ ...@@ -36,6 +36,7 @@
#include <linux/acpi.h> #include <linux/acpi.h>
#include <linux/string.h> #include <linux/string.h>
#include <linux/dmi.h> #include <linux/dmi.h>
#include <linux/wmi.h>
#include <acpi/video.h> #include <acpi/video.h>
#include "dell-smbios.h" #include "dell-smbios.h"
...@@ -53,6 +54,10 @@ static bool wmi_requires_smbios_request; ...@@ -53,6 +54,10 @@ static bool wmi_requires_smbios_request;
MODULE_ALIAS("wmi:"DELL_EVENT_GUID); MODULE_ALIAS("wmi:"DELL_EVENT_GUID);
MODULE_ALIAS("wmi:"DELL_DESCRIPTOR_GUID); MODULE_ALIAS("wmi:"DELL_DESCRIPTOR_GUID);
struct dell_wmi_priv {
struct input_dev *input_dev;
};
static int __init dmi_matched(const struct dmi_system_id *dmi) static int __init dmi_matched(const struct dmi_system_id *dmi)
{ {
wmi_requires_smbios_request = 1; wmi_requires_smbios_request = 1;
...@@ -86,7 +91,7 @@ static const struct dmi_system_id dell_wmi_smbios_list[] __initconst = { ...@@ -86,7 +91,7 @@ static const struct dmi_system_id dell_wmi_smbios_list[] __initconst = {
* notifications (rather than requests for change) or are also sent * notifications (rather than requests for change) or are also sent
* via the keyboard controller so should not be sent again. * via the keyboard controller so should not be sent again.
*/ */
static const struct key_entry dell_wmi_keymap_type_0000[] __initconst = { static const struct key_entry dell_wmi_keymap_type_0000[] = {
{ KE_IGNORE, 0x003a, { KEY_CAPSLOCK } }, { KE_IGNORE, 0x003a, { KEY_CAPSLOCK } },
/* Key code is followed by brightness level */ /* Key code is followed by brightness level */
...@@ -207,7 +212,7 @@ struct dell_dmi_results { ...@@ -207,7 +212,7 @@ struct dell_dmi_results {
}; };
/* Uninitialized entries here are KEY_RESERVED == 0. */ /* Uninitialized entries here are KEY_RESERVED == 0. */
static const u16 bios_to_linux_keycode[256] __initconst = { static const u16 bios_to_linux_keycode[256] = {
[0] = KEY_MEDIA, [0] = KEY_MEDIA,
[1] = KEY_NEXTSONG, [1] = KEY_NEXTSONG,
[2] = KEY_PLAYPAUSE, [2] = KEY_PLAYPAUSE,
...@@ -256,7 +261,7 @@ static const u16 bios_to_linux_keycode[256] __initconst = { ...@@ -256,7 +261,7 @@ static const u16 bios_to_linux_keycode[256] __initconst = {
* These are applied if the 0xB2 DMI hotkey table is present and doesn't * These are applied if the 0xB2 DMI hotkey table is present and doesn't
* override them. * override them.
*/ */
static const struct key_entry dell_wmi_keymap_type_0010[] __initconst = { static const struct key_entry dell_wmi_keymap_type_0010[] = {
/* Fn-lock */ /* Fn-lock */
{ KE_IGNORE, 0x151, { KEY_RESERVED } }, { KE_IGNORE, 0x151, { KEY_RESERVED } },
...@@ -294,7 +299,7 @@ static const struct key_entry dell_wmi_keymap_type_0010[] __initconst = { ...@@ -294,7 +299,7 @@ static const struct key_entry dell_wmi_keymap_type_0010[] __initconst = {
/* /*
* Keymap for WMI events of type 0x0011 * Keymap for WMI events of type 0x0011
*/ */
static const struct key_entry dell_wmi_keymap_type_0011[] __initconst = { static const struct key_entry dell_wmi_keymap_type_0011[] = {
/* Battery unplugged */ /* Battery unplugged */
{ KE_IGNORE, 0xfff0, { KEY_RESERVED } }, { KE_IGNORE, 0xfff0, { KEY_RESERVED } },
...@@ -309,13 +314,12 @@ static const struct key_entry dell_wmi_keymap_type_0011[] __initconst = { ...@@ -309,13 +314,12 @@ static const struct key_entry dell_wmi_keymap_type_0011[] __initconst = {
{ KE_IGNORE, 0x02f6, { KEY_RESERVED } }, { KE_IGNORE, 0x02f6, { KEY_RESERVED } },
}; };
static struct input_dev *dell_wmi_input_dev; static void dell_wmi_process_key(struct wmi_device *wdev, int type, int code)
static void dell_wmi_process_key(int type, int code)
{ {
struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
const struct key_entry *key; const struct key_entry *key;
key = sparse_keymap_entry_from_scancode(dell_wmi_input_dev, key = sparse_keymap_entry_from_scancode(priv->input_dev,
(type << 16) | code); (type << 16) | code);
if (!key) { if (!key) {
pr_info("Unknown key with type 0x%04x and code 0x%04x pressed\n", pr_info("Unknown key with type 0x%04x and code 0x%04x pressed\n",
...@@ -338,33 +342,18 @@ static void dell_wmi_process_key(int type, int code) ...@@ -338,33 +342,18 @@ static void dell_wmi_process_key(int type, int code)
dell_laptop_call_notifier( dell_laptop_call_notifier(
DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED, NULL); DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED, NULL);
sparse_keymap_report_entry(dell_wmi_input_dev, key, 1, true); sparse_keymap_report_entry(priv->input_dev, key, 1, true);
} }
static void dell_wmi_notify(u32 value, void *context) static void dell_wmi_notify(struct wmi_device *wdev,
union acpi_object *obj)
{ {
struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
acpi_status status;
acpi_size buffer_size;
u16 *buffer_entry, *buffer_end; u16 *buffer_entry, *buffer_end;
acpi_size buffer_size;
int len, i; int len, i;
status = wmi_get_event_data(value, &response);
if (status != AE_OK) {
pr_warn("bad event status 0x%x\n", status);
return;
}
obj = (union acpi_object *)response.pointer;
if (!obj) {
pr_warn("no response\n");
return;
}
if (obj->type != ACPI_TYPE_BUFFER) { if (obj->type != ACPI_TYPE_BUFFER) {
pr_warn("bad response type %x\n", obj->type); pr_warn("bad response type %x\n", obj->type);
kfree(obj);
return; return;
} }
...@@ -409,13 +398,14 @@ static void dell_wmi_notify(u32 value, void *context) ...@@ -409,13 +398,14 @@ static void dell_wmi_notify(u32 value, void *context)
switch (buffer_entry[1]) { switch (buffer_entry[1]) {
case 0x0000: /* One key pressed or event occurred */ case 0x0000: /* One key pressed or event occurred */
if (len > 2) if (len > 2)
dell_wmi_process_key(0x0000, buffer_entry[2]); dell_wmi_process_key(wdev, 0x0000,
buffer_entry[2]);
/* Other entries could contain additional information */ /* Other entries could contain additional information */
break; break;
case 0x0010: /* Sequence of keys pressed */ case 0x0010: /* Sequence of keys pressed */
case 0x0011: /* Sequence of events occurred */ case 0x0011: /* Sequence of events occurred */
for (i = 2; i < len; ++i) for (i = 2; i < len; ++i)
dell_wmi_process_key(buffer_entry[1], dell_wmi_process_key(wdev, buffer_entry[1],
buffer_entry[i]); buffer_entry[i]);
break; break;
default: /* Unknown event */ default: /* Unknown event */
...@@ -428,7 +418,6 @@ static void dell_wmi_notify(u32 value, void *context) ...@@ -428,7 +418,6 @@ static void dell_wmi_notify(u32 value, void *context)
} }
kfree(obj);
} }
static bool have_scancode(u32 scancode, const struct key_entry *keymap, int len) static bool have_scancode(u32 scancode, const struct key_entry *keymap, int len)
...@@ -442,9 +431,7 @@ static bool have_scancode(u32 scancode, const struct key_entry *keymap, int len) ...@@ -442,9 +431,7 @@ static bool have_scancode(u32 scancode, const struct key_entry *keymap, int len)
return false; return false;
} }
static void __init handle_dmi_entry(const struct dmi_header *dm, static void handle_dmi_entry(const struct dmi_header *dm, void *opaque)
void *opaque)
{ {
struct dell_dmi_results *results = opaque; struct dell_dmi_results *results = opaque;
struct dell_bios_hotkey_table *table; struct dell_bios_hotkey_table *table;
...@@ -515,19 +502,20 @@ static void __init handle_dmi_entry(const struct dmi_header *dm, ...@@ -515,19 +502,20 @@ static void __init handle_dmi_entry(const struct dmi_header *dm,
results->keymap_size = pos; results->keymap_size = pos;
} }
static int __init dell_wmi_input_setup(void) static int dell_wmi_input_setup(struct wmi_device *wdev)
{ {
struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
struct dell_dmi_results dmi_results = {}; struct dell_dmi_results dmi_results = {};
struct key_entry *keymap; struct key_entry *keymap;
int err, i, pos = 0; int err, i, pos = 0;
dell_wmi_input_dev = input_allocate_device(); priv->input_dev = input_allocate_device();
if (!dell_wmi_input_dev) if (!priv->input_dev)
return -ENOMEM; return -ENOMEM;
dell_wmi_input_dev->name = "Dell WMI hotkeys"; priv->input_dev->name = "Dell WMI hotkeys";
dell_wmi_input_dev->phys = "wmi/input0"; priv->input_dev->id.bustype = BUS_HOST;
dell_wmi_input_dev->id.bustype = BUS_HOST; priv->input_dev->dev.parent = &wdev->dev;
if (dmi_walk(handle_dmi_entry, &dmi_results)) { if (dmi_walk(handle_dmi_entry, &dmi_results)) {
/* /*
...@@ -602,7 +590,7 @@ static int __init dell_wmi_input_setup(void) ...@@ -602,7 +590,7 @@ static int __init dell_wmi_input_setup(void)
keymap[pos].type = KE_END; keymap[pos].type = KE_END;
err = sparse_keymap_setup(dell_wmi_input_dev, keymap, NULL); err = sparse_keymap_setup(priv->input_dev, keymap, NULL);
/* /*
* Sparse keymap library makes a copy of keymap so we don't need the * Sparse keymap library makes a copy of keymap so we don't need the
* original one that was allocated. * original one that was allocated.
...@@ -611,17 +599,24 @@ static int __init dell_wmi_input_setup(void) ...@@ -611,17 +599,24 @@ static int __init dell_wmi_input_setup(void)
if (err) if (err)
goto err_free_dev; goto err_free_dev;
err = input_register_device(dell_wmi_input_dev); err = input_register_device(priv->input_dev);
if (err) if (err)
goto err_free_dev; goto err_free_dev;
return 0; return 0;
err_free_dev: err_free_dev:
input_free_device(dell_wmi_input_dev); input_free_device(priv->input_dev);
return err; return err;
} }
static void dell_wmi_input_destroy(struct wmi_device *wdev)
{
struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
input_unregister_device(priv->input_dev);
}
/* /*
* Descriptor buffer is 128 byte long and contains: * Descriptor buffer is 128 byte long and contains:
* *
...@@ -720,46 +715,55 @@ static int dell_wmi_events_set_enabled(bool enable) ...@@ -720,46 +715,55 @@ static int dell_wmi_events_set_enabled(bool enable)
return dell_smbios_error(ret); return dell_smbios_error(ret);
} }
static int dell_wmi_probe(struct wmi_device *wdev)
{
struct dell_wmi_priv *priv = devm_kzalloc(
&wdev->dev, sizeof(struct dell_wmi_priv), GFP_KERNEL);
dev_set_drvdata(&wdev->dev, priv);
return dell_wmi_input_setup(wdev);
}
static int dell_wmi_remove(struct wmi_device *wdev)
{
dell_wmi_input_destroy(wdev);
return 0;
}
static const struct wmi_device_id dell_wmi_id_table[] = {
{ .guid_string = DELL_EVENT_GUID },
{ },
};
static struct wmi_driver dell_wmi_driver = {
.driver = {
.name = "dell-wmi",
},
.id_table = dell_wmi_id_table,
.probe = dell_wmi_probe,
.remove = dell_wmi_remove,
.notify = dell_wmi_notify,
};
static int __init dell_wmi_init(void) static int __init dell_wmi_init(void)
{ {
int err; int err;
acpi_status status;
if (!wmi_has_guid(DELL_EVENT_GUID) ||
!wmi_has_guid(DELL_DESCRIPTOR_GUID)) {
pr_warn("Dell WMI GUID were not found\n");
return -ENODEV;
}
err = dell_wmi_check_descriptor_buffer(); err = dell_wmi_check_descriptor_buffer();
if (err) if (err)
return err; return err;
err = dell_wmi_input_setup();
if (err)
return err;
status = wmi_install_notify_handler(DELL_EVENT_GUID,
dell_wmi_notify, NULL);
if (ACPI_FAILURE(status)) {
input_unregister_device(dell_wmi_input_dev);
pr_err("Unable to register notify handler - %d\n", status);
return -ENODEV;
}
dmi_check_system(dell_wmi_smbios_list); dmi_check_system(dell_wmi_smbios_list);
if (wmi_requires_smbios_request) { if (wmi_requires_smbios_request) {
err = dell_wmi_events_set_enabled(true); err = dell_wmi_events_set_enabled(true);
if (err) { if (err) {
pr_err("Failed to enable WMI events\n"); pr_err("Failed to enable WMI events\n");
wmi_remove_notify_handler(DELL_EVENT_GUID);
input_unregister_device(dell_wmi_input_dev);
return err; return err;
} }
} }
return 0; return wmi_driver_register(&dell_wmi_driver);
} }
module_init(dell_wmi_init); module_init(dell_wmi_init);
...@@ -767,7 +771,7 @@ static void __exit dell_wmi_exit(void) ...@@ -767,7 +771,7 @@ static void __exit dell_wmi_exit(void)
{ {
if (wmi_requires_smbios_request) if (wmi_requires_smbios_request)
dell_wmi_events_set_enabled(false); dell_wmi_events_set_enabled(false);
wmi_remove_notify_handler(DELL_EVENT_GUID);
input_unregister_device(dell_wmi_input_dev); wmi_driver_unregister(&dell_wmi_driver);
} }
module_exit(dell_wmi_exit); module_exit(dell_wmi_exit);
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