From: Andy Lutomirski Date: Wed, 25 Nov 2015 15:53:13 +0000 (-0800) Subject: platform/x86: dell-wmi: Convert to the WMI bus infrastructure X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=bff589be59c50924a9715951160578e570cba5c6;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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: Andy Lutomirski [dvhart: drop deprecated sparse_keymap_free, order declarations, add commit msg] Cc: Andy Lutomirski Cc: Mario Limonciello Cc: Pali Rohár Cc: linux-kernel@vger.kernel.org Cc: platform-driver-x86@vger.kernel.org Cc: linux-acpi@vger.kernel.org Acked-by: Rafael J. Wysocki Signed-off-by: Darren Hart (VMware) --- diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c index 73aee0d1aea4..f8978464df31 100644 --- a/drivers/platform/x86/dell-wmi.c +++ b/drivers/platform/x86/dell-wmi.c @@ -36,6 +36,7 @@ #include #include #include +#include #include #include "dell-smbios.h" @@ -53,6 +54,10 @@ static bool wmi_requires_smbios_request; MODULE_ALIAS("wmi:"DELL_EVENT_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) { wmi_requires_smbios_request = 1; @@ -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 * 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 } }, /* Key code is followed by brightness level */ @@ -207,7 +212,7 @@ struct dell_dmi_results { }; /* 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, [1] = KEY_NEXTSONG, [2] = KEY_PLAYPAUSE, @@ -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 * 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 */ { KE_IGNORE, 0x151, { KEY_RESERVED } }, @@ -294,7 +299,7 @@ static const struct key_entry dell_wmi_keymap_type_0010[] __initconst = { /* * 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 */ { KE_IGNORE, 0xfff0, { KEY_RESERVED } }, @@ -309,13 +314,12 @@ static const struct key_entry dell_wmi_keymap_type_0011[] __initconst = { { KE_IGNORE, 0x02f6, { KEY_RESERVED } }, }; -static struct input_dev *dell_wmi_input_dev; - -static void dell_wmi_process_key(int type, int code) +static void dell_wmi_process_key(struct wmi_device *wdev, int type, int code) { + struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev); 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); if (!key) { 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) dell_laptop_call_notifier( 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; + acpi_size buffer_size; 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) { pr_warn("bad response type %x\n", obj->type); - kfree(obj); return; } @@ -409,13 +398,14 @@ static void dell_wmi_notify(u32 value, void *context) switch (buffer_entry[1]) { case 0x0000: /* One key pressed or event occurred */ 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 */ break; case 0x0010: /* Sequence of keys pressed */ case 0x0011: /* Sequence of events occurred */ for (i = 2; i < len; ++i) - dell_wmi_process_key(buffer_entry[1], + dell_wmi_process_key(wdev, buffer_entry[1], buffer_entry[i]); break; default: /* Unknown event */ @@ -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) @@ -442,9 +431,7 @@ static bool have_scancode(u32 scancode, const struct key_entry *keymap, int len) return false; } -static void __init handle_dmi_entry(const struct dmi_header *dm, - void *opaque) - +static void handle_dmi_entry(const struct dmi_header *dm, void *opaque) { struct dell_dmi_results *results = opaque; struct dell_bios_hotkey_table *table; @@ -515,19 +502,20 @@ static void __init handle_dmi_entry(const struct dmi_header *dm, 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 key_entry *keymap; int err, i, pos = 0; - dell_wmi_input_dev = input_allocate_device(); - if (!dell_wmi_input_dev) + priv->input_dev = input_allocate_device(); + if (!priv->input_dev) return -ENOMEM; - dell_wmi_input_dev->name = "Dell WMI hotkeys"; - dell_wmi_input_dev->phys = "wmi/input0"; - dell_wmi_input_dev->id.bustype = BUS_HOST; + priv->input_dev->name = "Dell WMI hotkeys"; + priv->input_dev->id.bustype = BUS_HOST; + priv->input_dev->dev.parent = &wdev->dev; if (dmi_walk(handle_dmi_entry, &dmi_results)) { /* @@ -602,7 +590,7 @@ static int __init dell_wmi_input_setup(void) 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 * original one that was allocated. @@ -611,17 +599,24 @@ static int __init dell_wmi_input_setup(void) if (err) goto err_free_dev; - err = input_register_device(dell_wmi_input_dev); + err = input_register_device(priv->input_dev); if (err) goto err_free_dev; return 0; err_free_dev: - input_free_device(dell_wmi_input_dev); + input_free_device(priv->input_dev); 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: * @@ -720,46 +715,55 @@ static int dell_wmi_events_set_enabled(bool enable) 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) { 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(); if (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); if (wmi_requires_smbios_request) { err = dell_wmi_events_set_enabled(true); if (err) { 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 0; + return wmi_driver_register(&dell_wmi_driver); } module_init(dell_wmi_init); @@ -767,7 +771,7 @@ static void __exit dell_wmi_exit(void) { if (wmi_requires_smbios_request) 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);