diff options
Diffstat (limited to 'drivers/platform/x86/hp-wmi.c')
-rw-r--r-- | drivers/platform/x86/hp-wmi.c | 282 |
1 files changed, 220 insertions, 62 deletions
diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c index 56086363bec..f1551637498 100644 --- a/drivers/platform/x86/hp-wmi.c +++ b/drivers/platform/x86/hp-wmi.c @@ -26,9 +26,9 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> +#include <linux/slab.h> #include <linux/types.h> #include <linux/input.h> -#include <acpi/acpi_drivers.h> #include <linux/platform_device.h> #include <linux/acpi.h> #include <linux/rfkill.h> @@ -51,12 +51,25 @@ MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4"); #define HPWMI_WIRELESS_QUERY 0x5 #define HPWMI_HOTKEY_QUERY 0xc +#define PREFIX "HP WMI: " +#define UNIMP "Unimplemented " + enum hp_wmi_radio { HPWMI_WIFI = 0, HPWMI_BLUETOOTH = 1, HPWMI_WWAN = 2, }; +enum hp_wmi_event_ids { + HPWMI_DOCK_EVENT = 1, + HPWMI_PARK_HDD = 2, + HPWMI_SMART_ADAPTER = 3, + HPWMI_BEZEL_BUTTON = 4, + HPWMI_WIRELESS = 5, + HPWMI_CPU_BATTERY_THROTTLE = 6, + HPWMI_LOCK_SWITCH = 7, +}; + static int __devinit hp_wmi_bios_setup(struct platform_device *device); static int __exit hp_wmi_bios_remove(struct platform_device *device); static int hp_wmi_resume_handler(struct device *device); @@ -66,13 +79,12 @@ struct bios_args { u32 command; u32 commandtype; u32 datasize; - u32 data; + char *data; }; struct bios_return { u32 sigpass; u32 return_code; - u32 value; }; struct key_entry { @@ -87,6 +99,7 @@ static struct key_entry hp_wmi_keymap[] = { {KE_KEY, 0x02, KEY_BRIGHTNESSUP}, {KE_KEY, 0x03, KEY_BRIGHTNESSDOWN}, {KE_KEY, 0x20e6, KEY_PROG1}, + {KE_KEY, 0x20e8, KEY_MEDIA}, {KE_KEY, 0x2142, KEY_MEDIA}, {KE_KEY, 0x213b, KEY_INFO}, {KE_KEY, 0x2169, KEY_DIRECTION}, @@ -116,7 +129,27 @@ static struct platform_driver hp_wmi_driver = { .remove = hp_wmi_bios_remove, }; -static int hp_wmi_perform_query(int query, int write, int value) +/* + * hp_wmi_perform_query + * + * query: The commandtype -> What should be queried + * write: The command -> 0 read, 1 write, 3 ODM specific + * buffer: Buffer used as input and/or output + * buffersize: Size of buffer + * + * returns zero on success + * an HP WMI query specific error code (which is positive) + * -EINVAL if the query was not successful at all + * -EINVAL if the output buffer size exceeds buffersize + * + * Note: The buffersize must at least be the maximum of the input and output + * size. E.g. Battery info query (0x7) is defined to have 1 byte input + * and 128 byte output. The caller would do: + * buffer = kzalloc(128, GFP_KERNEL); + * ret = hp_wmi_perform_query(0x7, 0, buffer, 128) + */ +static int hp_wmi_perform_query(int query, int write, char *buffer, + int buffersize) { struct bios_return bios_return; acpi_status status; @@ -125,8 +158,8 @@ static int hp_wmi_perform_query(int query, int write, int value) .signature = 0x55434553, .command = write ? 0x2 : 0x1, .commandtype = query, - .datasize = write ? 0x4 : 0, - .data = value, + .datasize = buffersize, + .data = buffer, }; struct acpi_buffer input = { sizeof(struct bios_args), &args }; struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; @@ -143,54 +176,90 @@ static int hp_wmi_perform_query(int query, int write, int value) } bios_return = *((struct bios_return *)obj->buffer.pointer); + + if (bios_return.return_code) { + printk(KERN_WARNING PREFIX "Query %d returned %d\n", query, + bios_return.return_code); + kfree(obj); + return bios_return.return_code; + } + if (obj->buffer.length - sizeof(bios_return) > buffersize) { + kfree(obj); + return -EINVAL; + } + + memset(buffer, 0, buffersize); + memcpy(buffer, + ((char *)obj->buffer.pointer) + sizeof(struct bios_return), + obj->buffer.length - sizeof(bios_return)); kfree(obj); - if (bios_return.return_code > 0) - return bios_return.return_code * -1; - else - return bios_return.value; + return 0; } static int hp_wmi_display_state(void) { - return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0); + int state; + int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, (char *)&state, + sizeof(state)); + if (ret) + return -EINVAL; + return state; } static int hp_wmi_hddtemp_state(void) { - return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0); + int state; + int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, (char *)&state, + sizeof(state)); + if (ret) + return -EINVAL; + return state; } static int hp_wmi_als_state(void) { - return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0); + int state; + int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, (char *)&state, + sizeof(state)); + if (ret) + return -EINVAL; + return state; } static int hp_wmi_dock_state(void) { - int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0); + int state; + int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, (char *)&state, + sizeof(state)); - if (ret < 0) - return ret; + if (ret) + return -EINVAL; - return ret & 0x1; + return state & 0x1; } static int hp_wmi_tablet_state(void) { - int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0); - - if (ret < 0) + int state; + int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, (char *)&state, + sizeof(state)); + if (ret) return ret; - return (ret & 0x4) ? 1 : 0; + return (state & 0x4) ? 1 : 0; } static int hp_wmi_set_block(void *data, bool blocked) { enum hp_wmi_radio r = (enum hp_wmi_radio) data; int query = BIT(r + 8) | ((!blocked) << r); + int ret; - return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, query); + ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, + (char *)&query, sizeof(query)); + if (ret) + return -EINVAL; + return 0; } static const struct rfkill_ops hp_wmi_rfkill_ops = { @@ -199,8 +268,13 @@ static const struct rfkill_ops hp_wmi_rfkill_ops = { static bool hp_wmi_get_sw_state(enum hp_wmi_radio r) { - int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); - int mask = 0x200 << (r * 8); + int wireless; + int mask; + hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, + (char *)&wireless, sizeof(wireless)); + /* TBD: Pass error */ + + mask = 0x200 << (r * 8); if (wireless & mask) return false; @@ -210,8 +284,13 @@ static bool hp_wmi_get_sw_state(enum hp_wmi_radio r) static bool hp_wmi_get_hw_state(enum hp_wmi_radio r) { - int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); - int mask = 0x800 << (r * 8); + int wireless; + int mask; + hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, + (char *)&wireless, sizeof(wireless)); + /* TBD: Pass error */ + + mask = 0x800 << (r * 8); if (wireless & mask) return false; @@ -268,7 +347,11 @@ static ssize_t set_als(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { u32 tmp = simple_strtoul(buf, NULL, 10); - hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp); + int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, (char *)&tmp, + sizeof(tmp)); + if (ret) + return -EINVAL; + return count; } @@ -337,47 +420,82 @@ static void hp_wmi_notify(u32 value, void *context) struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; static struct key_entry *key; union acpi_object *obj; - int eventcode; + u32 event_id, event_data; + int key_code, ret; + u32 *location; acpi_status status; status = wmi_get_event_data(value, &response); if (status != AE_OK) { - printk(KERN_INFO "hp-wmi: bad event status 0x%x\n", status); + printk(KERN_INFO PREFIX "bad event status 0x%x\n", status); return; } obj = (union acpi_object *)response.pointer; - if (!obj || obj->type != ACPI_TYPE_BUFFER || obj->buffer.length != 8) { - printk(KERN_INFO "HP WMI: Unknown response received\n"); + if (!obj) + return; + if (obj->type != ACPI_TYPE_BUFFER) { + printk(KERN_INFO "hp-wmi: Unknown response received %d\n", + obj->type); kfree(obj); return; } - eventcode = *((u8 *) obj->buffer.pointer); + /* + * Depending on ACPI version the concatenation of id and event data + * inside _WED function will result in a 8 or 16 byte buffer. + */ + location = (u32 *)obj->buffer.pointer; + if (obj->buffer.length == 8) { + event_id = *location; + event_data = *(location + 1); + } else if (obj->buffer.length == 16) { + event_id = *location; + event_data = *(location + 2); + } else { + printk(KERN_INFO "hp-wmi: Unknown buffer length %d\n", + obj->buffer.length); + kfree(obj); + return; + } kfree(obj); - if (eventcode == 0x4) - eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0, - 0); - key = hp_wmi_get_entry_by_scancode(eventcode); - if (key) { - switch (key->type) { - case KE_KEY: - input_report_key(hp_wmi_input_dev, - key->keycode, 1); - input_sync(hp_wmi_input_dev); - input_report_key(hp_wmi_input_dev, - key->keycode, 0); - input_sync(hp_wmi_input_dev); - break; - } - } else if (eventcode == 0x1) { + + switch (event_id) { + case HPWMI_DOCK_EVENT: input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state()); input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, hp_wmi_tablet_state()); input_sync(hp_wmi_input_dev); - } else if (eventcode == 0x5) { + break; + case HPWMI_PARK_HDD: + break; + case HPWMI_SMART_ADAPTER: + break; + case HPWMI_BEZEL_BUTTON: + ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0, + (char *)&key_code, + sizeof(key_code)); + if (ret) + break; + key = hp_wmi_get_entry_by_scancode(key_code); + if (key) { + switch (key->type) { + case KE_KEY: + input_report_key(hp_wmi_input_dev, + key->keycode, 1); + input_sync(hp_wmi_input_dev); + input_report_key(hp_wmi_input_dev, + key->keycode, 0); + input_sync(hp_wmi_input_dev); + break; + } + } else + printk(KERN_INFO PREFIX "Unknown key code - 0x%x\n", + key_code); + break; + case HPWMI_WIRELESS: if (wifi_rfkill) rfkill_set_states(wifi_rfkill, hp_wmi_get_sw_state(HPWMI_WIFI), @@ -390,9 +508,18 @@ static void hp_wmi_notify(u32 value, void *context) rfkill_set_states(wwan_rfkill, hp_wmi_get_sw_state(HPWMI_WWAN), hp_wmi_get_hw_state(HPWMI_WWAN)); - } else - printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n", - eventcode); + break; + case HPWMI_CPU_BATTERY_THROTTLE: + printk(KERN_INFO PREFIX UNIMP "CPU throttle because of 3 Cell" + " battery event detected\n"); + break; + case HPWMI_LOCK_SWITCH: + break; + default: + printk(KERN_INFO PREFIX "Unknown event_id - %d - 0x%x\n", + event_id, event_data); + break; + } } static int __init hp_wmi_input_setup(void) @@ -401,6 +528,8 @@ static int __init hp_wmi_input_setup(void) int err; hp_wmi_input_dev = input_allocate_device(); + if (!hp_wmi_input_dev) + return -ENOMEM; hp_wmi_input_dev->name = "HP WMI hotkeys"; hp_wmi_input_dev->phys = "wmi/input0"; @@ -449,7 +578,12 @@ static void cleanup_sysfs(struct platform_device *device) static int __devinit hp_wmi_bios_setup(struct platform_device *device) { int err; - int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); + int wireless; + + err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, (char *)&wireless, + sizeof(wireless)); + if (err) + return err; err = device_create_file(&device->dev, &dev_attr_display); if (err) @@ -580,27 +714,51 @@ static int hp_wmi_resume_handler(struct device *device) static int __init hp_wmi_init(void) { int err; + int event_capable = wmi_has_guid(HPWMI_EVENT_GUID); + int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID); - if (wmi_has_guid(HPWMI_EVENT_GUID)) { + if (event_capable) { err = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL); - if (ACPI_SUCCESS(err)) - hp_wmi_input_setup(); + if (ACPI_FAILURE(err)) + return -EINVAL; + err = hp_wmi_input_setup(); + if (err) { + wmi_remove_notify_handler(HPWMI_EVENT_GUID); + return err; + } } - if (wmi_has_guid(HPWMI_BIOS_GUID)) { + if (bios_capable) { err = platform_driver_register(&hp_wmi_driver); if (err) - return 0; + goto err_driver_reg; hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1); if (!hp_wmi_platform_dev) { - platform_driver_unregister(&hp_wmi_driver); - return 0; + err = -ENOMEM; + goto err_device_alloc; } - platform_device_add(hp_wmi_platform_dev); + err = platform_device_add(hp_wmi_platform_dev); + if (err) + goto err_device_add; } + if (!bios_capable && !event_capable) + return -ENODEV; + return 0; + +err_device_add: + platform_device_put(hp_wmi_platform_dev); +err_device_alloc: + platform_driver_unregister(&hp_wmi_driver); +err_driver_reg: + if (wmi_has_guid(HPWMI_EVENT_GUID)) { + input_unregister_device(hp_wmi_input_dev); + wmi_remove_notify_handler(HPWMI_EVENT_GUID); + } + + return err; } static void __exit hp_wmi_exit(void) @@ -610,7 +768,7 @@ static void __exit hp_wmi_exit(void) input_unregister_device(hp_wmi_input_dev); } if (hp_wmi_platform_dev) { - platform_device_del(hp_wmi_platform_dev); + platform_device_unregister(hp_wmi_platform_dev); platform_driver_unregister(&hp_wmi_driver); } } |