diff options
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/eeepc-wmi.c | 232 |
1 files changed, 197 insertions, 35 deletions
diff --git a/drivers/platform/x86/eeepc-wmi.c b/drivers/platform/x86/eeepc-wmi.c index 0c9596c97a0f..b227eb469f49 100644 --- a/drivers/platform/x86/eeepc-wmi.c +++ b/drivers/platform/x86/eeepc-wmi.c @@ -32,6 +32,8 @@ #include <linux/slab.h> #include <linux/input.h> #include <linux/input/sparse-keymap.h> +#include <linux/fb.h> +#include <linux/backlight.h> #include <linux/platform_device.h> #include <acpi/acpi_bus.h> #include <acpi/acpi_drivers.h> @@ -43,14 +45,21 @@ MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver"); MODULE_LICENSE("GPL"); #define EEEPC_WMI_EVENT_GUID "ABBC0F72-8EA1-11D1-00A0-C90629100000" +#define EEEPC_WMI_MGMT_GUID "97845ED0-4E6D-11DE-8A39-0800200C9A66" MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID); +MODULE_ALIAS("wmi:"EEEPC_WMI_MGMT_GUID); #define NOTIFY_BRNUP_MIN 0x11 #define NOTIFY_BRNUP_MAX 0x1f #define NOTIFY_BRNDOWN_MIN 0x20 #define NOTIFY_BRNDOWN_MAX 0x2e +#define EEEPC_WMI_METHODID_DEVS 0x53564544 +#define EEEPC_WMI_METHODID_DSTS 0x53544344 + +#define EEEPC_WMI_DEVID_BACKLIGHT 0x00050012 + static const struct key_entry eeepc_wmi_keymap[] = { /* Sleep already handled via generic ACPI code */ { KE_KEY, 0x5d, { KEY_WLAN } }, @@ -63,44 +72,18 @@ static const struct key_entry eeepc_wmi_keymap[] = { { KE_END, 0}, }; +struct bios_args { + u32 dev_id; + u32 ctrl_param; +}; + struct eeepc_wmi { struct input_dev *inputdev; + struct backlight_device *backlight_device; }; static struct platform_device *platform_device; -static void eeepc_wmi_notify(u32 value, void *context) -{ - struct eeepc_wmi *eeepc = context; - struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *obj; - acpi_status status; - int code; - - status = wmi_get_event_data(value, &response); - if (status != AE_OK) { - pr_err("bad event status 0x%x\n", status); - return; - } - - obj = (union acpi_object *)response.pointer; - - if (obj && obj->type == ACPI_TYPE_INTEGER) { - code = obj->integer.value; - - if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) - code = NOTIFY_BRNUP_MIN; - else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) - code = NOTIFY_BRNDOWN_MIN; - - if (!sparse_keymap_report_event(eeepc->inputdev, - code, 1, true)) - pr_info("Unknown key %x pressed\n", code); - } - - kfree(obj); -} - static int eeepc_wmi_input_init(struct eeepc_wmi *eeepc) { int err; @@ -141,6 +124,174 @@ static void eeepc_wmi_input_exit(struct eeepc_wmi *eeepc) eeepc->inputdev = NULL; } +static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *ctrl_param) +{ + struct acpi_buffer input = { (acpi_size)sizeof(u32), &dev_id }; + struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *obj; + acpi_status status; + u32 tmp; + + status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, + 1, EEEPC_WMI_METHODID_DSTS, &input, &output); + + if (ACPI_FAILURE(status)) + return status; + + obj = (union acpi_object *)output.pointer; + if (obj && obj->type == ACPI_TYPE_INTEGER) + tmp = (u32)obj->integer.value; + else + tmp = 0; + + if (ctrl_param) + *ctrl_param = tmp; + + kfree(obj); + + return status; + +} + +static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param) +{ + struct bios_args args = { + .dev_id = dev_id, + .ctrl_param = ctrl_param, + }; + struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; + acpi_status status; + + status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, + 1, EEEPC_WMI_METHODID_DEVS, &input, NULL); + + return status; +} + +static int read_brightness(struct backlight_device *bd) +{ + static u32 ctrl_param; + acpi_status status; + + status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BACKLIGHT, &ctrl_param); + + if (ACPI_FAILURE(status)) + return -1; + else + return ctrl_param & 0xFF; +} + +static int update_bl_status(struct backlight_device *bd) +{ + + static u32 ctrl_param; + acpi_status status; + + ctrl_param = bd->props.brightness; + + status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT, ctrl_param); + + if (ACPI_FAILURE(status)) + return -1; + else + return 0; +} + +static const struct backlight_ops eeepc_wmi_bl_ops = { + .get_brightness = read_brightness, + .update_status = update_bl_status, +}; + +static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code) +{ + struct backlight_device *bd = eeepc->backlight_device; + int old = bd->props.brightness; + int new; + + if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) + new = code - NOTIFY_BRNUP_MIN + 1; + else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) + new = code - NOTIFY_BRNDOWN_MIN; + + bd->props.brightness = new; + backlight_update_status(bd); + backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); + + return old; +} + +static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc) +{ + struct backlight_device *bd; + struct backlight_properties props; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.max_brightness = 15; + bd = backlight_device_register(EEEPC_WMI_FILE, + &platform_device->dev, eeepc, + &eeepc_wmi_bl_ops, &props); + if (IS_ERR(bd)) { + pr_err("Could not register backlight device\n"); + return PTR_ERR(bd); + } + + eeepc->backlight_device = bd; + + bd->props.brightness = read_brightness(bd); + bd->props.power = FB_BLANK_UNBLANK; + backlight_update_status(bd); + + return 0; +} + +static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc) +{ + if (eeepc->backlight_device) + backlight_device_unregister(eeepc->backlight_device); + + eeepc->backlight_device = NULL; +} + +static void eeepc_wmi_notify(u32 value, void *context) +{ + struct eeepc_wmi *eeepc = context; + struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *obj; + acpi_status status; + int code; + int orig_code; + + status = wmi_get_event_data(value, &response); + if (status != AE_OK) { + pr_err("bad event status 0x%x\n", status); + return; + } + + obj = (union acpi_object *)response.pointer; + + if (obj && obj->type == ACPI_TYPE_INTEGER) { + code = obj->integer.value; + orig_code = code; + + if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) + code = NOTIFY_BRNUP_MIN; + else if (code >= NOTIFY_BRNDOWN_MIN && + code <= NOTIFY_BRNDOWN_MAX) + code = NOTIFY_BRNDOWN_MIN; + + if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) { + if (!acpi_video_backlight_support()) + eeepc_wmi_backlight_notify(eeepc, orig_code); + } + + if (!sparse_keymap_report_event(eeepc->inputdev, + code, 1, true)) + pr_info("Unknown key %x pressed\n", code); + } + + kfree(obj); +} + static int __devinit eeepc_wmi_platform_probe(struct platform_device *device) { struct eeepc_wmi *eeepc; @@ -151,7 +302,14 @@ static int __devinit eeepc_wmi_platform_probe(struct platform_device *device) err = eeepc_wmi_input_init(eeepc); if (err) - return err; + goto error_input; + + if (!acpi_video_backlight_support()) { + err = eeepc_wmi_backlight_init(eeepc); + if (err) + goto error_backlight; + } else + pr_info("Backlight controlled by ACPI video driver\n"); status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID, eeepc_wmi_notify, eeepc); @@ -165,8 +323,10 @@ static int __devinit eeepc_wmi_platform_probe(struct platform_device *device) return 0; error_wmi: + eeepc_wmi_backlight_exit(eeepc); +error_backlight: eeepc_wmi_input_exit(eeepc); - +error_input: return err; } @@ -176,6 +336,7 @@ static int __devexit eeepc_wmi_platform_remove(struct platform_device *device) eeepc = platform_get_drvdata(device); wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); + eeepc_wmi_backlight_exit(eeepc); eeepc_wmi_input_exit(eeepc); return 0; @@ -195,7 +356,8 @@ static int __init eeepc_wmi_init(void) struct eeepc_wmi *eeepc; int err; - if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID)) { + if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) || + !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) { pr_warning("No known WMI GUID found\n"); return -ENODEV; } |
