diff options
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/asus-wmi.c | 162 |
1 files changed, 65 insertions, 97 deletions
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c index 39ce3c1a7712..34e6b4d83a93 100644 --- a/drivers/platform/x86/asus-wmi.c +++ b/drivers/platform/x86/asus-wmi.c @@ -70,6 +70,8 @@ MODULE_LICENSE("GPL"); #define ASUS_WMI_METHODID_DEVS 0x53564544 #define ASUS_WMI_METHODID_CFVS 0x53564643 +#define ASUS_WMI_UNSUPPORTED_METHOD 0xFFFFFFFE + /* Wireless */ #define ASUS_WMI_DEVID_WLAN 0x00010011 #define ASUS_WMI_DEVID_BLUETOOTH 0x00010013 @@ -98,9 +100,9 @@ MODULE_LICENSE("GPL"); #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00 struct bios_args { - u32 dev_id; - u32 ctrl_param; -}; + u32 arg0; + u32 arg1; +} __packed; /* * <platform>/ - debugfs root directory @@ -187,20 +189,24 @@ static void asus_wmi_input_exit(struct asus_wmi *asus) asus->inputdev = NULL; } -static acpi_status asus_wmi_get_devstate(u32 dev_id, u32 *retval) +static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, + u32 *retval) { - struct acpi_buffer input = { (acpi_size) sizeof(u32), &dev_id }; + struct bios_args args = { + .arg0 = arg0, + .arg1 = arg1, + }; + struct acpi_buffer input = { (acpi_size) sizeof(args), &args }; struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *obj; acpi_status status; + union acpi_object *obj; u32 tmp; - status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, - 1, ASUS_WMI_METHODID_DSTS, + status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id, &input, &output); if (ACPI_FAILURE(status)) - return status; + goto exit; obj = (union acpi_object *)output.pointer; if (obj && obj->type == ACPI_TYPE_INTEGER) @@ -213,60 +219,39 @@ static acpi_status asus_wmi_get_devstate(u32 dev_id, u32 *retval) kfree(obj); - return status; +exit: + if (ACPI_FAILURE(status)) + return -EIO; + + if (tmp == ASUS_WMI_UNSUPPORTED_METHOD) + return -ENODEV; + return 0; } -static acpi_status asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, - u32 *retval) +static int asus_wmi_get_devstate(u32 dev_id, u32 *retval) { - struct bios_args args = { - .dev_id = dev_id, - .ctrl_param = ctrl_param, - }; - struct acpi_buffer input = { (acpi_size) sizeof(args), &args }; - acpi_status status; - - if (!retval) { - status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, - ASUS_WMI_METHODID_DEVS, - &input, NULL); - } else { - struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *obj; - u32 tmp; - - status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, - ASUS_WMI_METHODID_DEVS, - &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; - - *retval = tmp; - - kfree(obj); - } + return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, dev_id, + 0, retval); +} - return status; +static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, + u32 *retval) +{ + return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id, + ctrl_param, retval); } /* Helper for special devices with magic return codes */ static int asus_wmi_get_devstate_bits(u32 dev_id, u32 mask) { u32 retval = 0; - acpi_status status; + int err; - status = asus_wmi_get_devstate(dev_id, &retval); + err = asus_wmi_get_devstate(dev_id, &retval); - if (ACPI_FAILURE(status)) - return -EINVAL; + if (err < 0) + return err; if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT)) return -ENODEV; @@ -584,14 +569,8 @@ static int asus_rfkill_set(void *data, bool blocked) { struct asus_rfkill *priv = data; u32 ctrl_param = !blocked; - acpi_status status; - - status = asus_wmi_set_devstate(priv->dev_id, ctrl_param, NULL); - - if (ACPI_FAILURE(status)) - return -EIO; - return 0; + return asus_wmi_set_devstate(priv->dev_id, ctrl_param, NULL); } static void asus_rfkill_query(struct rfkill *rfkill, void *data) @@ -784,38 +763,34 @@ static int read_backlight_power(void) static int read_brightness(struct backlight_device *bd) { u32 retval; - acpi_status status; + int err; - status = asus_wmi_get_devstate(ASUS_WMI_DEVID_BRIGHTNESS, &retval); + err = asus_wmi_get_devstate(ASUS_WMI_DEVID_BRIGHTNESS, &retval); - if (ACPI_FAILURE(status)) - return -EIO; - else - return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK; + if (err < 0) + return err; + + return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK; } static int update_bl_status(struct backlight_device *bd) { u32 ctrl_param; - acpi_status status; - int power; + int power, err; ctrl_param = bd->props.brightness; - status = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS, - ctrl_param, NULL); + err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS, + ctrl_param, NULL); - if (ACPI_FAILURE(status)) - return -EIO; + if (err < 0) + return err; power = read_backlight_power(); if (power != -ENODEV && bd->props.power != power) { ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK); - status = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT, - ctrl_param, NULL); - - if (ACPI_FAILURE(status)) - return -EIO; + err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT, + ctrl_param, NULL); } return 0; } @@ -948,19 +923,19 @@ static int parse_arg(const char *buf, unsigned long count, int *val) static ssize_t store_sys_wmi(int devid, const char *buf, size_t count) { - acpi_status status; u32 retval; - int rv, value; + int rv, err, value; value = asus_wmi_get_devstate_simple(devid); if (value == -ENODEV) /* Check device presence */ return value; rv = parse_arg(buf, count, &value); - status = asus_wmi_set_devstate(devid, value, &retval); + err = asus_wmi_set_devstate(devid, value, &retval); + + if (err < 0) + return err; - if (ACPI_FAILURE(status)) - return -EIO; return rv; } @@ -1003,21 +978,13 @@ static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int value; - struct acpi_buffer input = { (acpi_size) sizeof(value), &value }; - acpi_status status; if (!count || sscanf(buf, "%i", &value) != 1) return -EINVAL; if (value < 0 || value > 2) return -EINVAL; - status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, - 1, ASUS_WMI_METHODID_CFVS, &input, NULL); - - if (ACPI_FAILURE(status)) - return -EIO; - else - return count; + return asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL); } static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv); @@ -1089,13 +1056,13 @@ struct asus_wmi_debugfs_node { static int show_dsts(struct seq_file *m, void *data) { struct asus_wmi *asus = m->private; - acpi_status status; + int err; u32 retval = -1; - status = asus_wmi_get_devstate(asus->debug.dev_id, &retval); + err = asus_wmi_get_devstate(asus->debug.dev_id, &retval); - if (ACPI_FAILURE(status)) - return -EIO; + if (err < 0) + return err; seq_printf(m, "DSTS(%x) = %x\n", asus->debug.dev_id, retval); @@ -1105,13 +1072,14 @@ static int show_dsts(struct seq_file *m, void *data) static int show_devs(struct seq_file *m, void *data) { struct asus_wmi *asus = m->private; - acpi_status status; + int err; u32 retval = -1; - status = asus_wmi_set_devstate(asus->debug.dev_id, - asus->debug.ctrl_param, &retval); - if (ACPI_FAILURE(status)) - return -EIO; + err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param, + &retval); + + if (err < 0) + return err; seq_printf(m, "DEVS(%x, %x) = %x\n", asus->debug.dev_id, asus->debug.ctrl_param, retval); 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