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-rw-r--r--drivers/platform/x86/intel-hid.c178
1 files changed, 157 insertions, 21 deletions
diff --git a/drivers/platform/x86/intel-hid.c b/drivers/platform/x86/intel-hid.c
index b5adba227783..6cf9b7fa5bf0 100644
--- a/drivers/platform/x86/intel-hid.c
+++ b/drivers/platform/x86/intel-hid.c
@@ -96,13 +96,140 @@ struct intel_hid_priv {
bool wakeup_mode;
};
-static int intel_hid_set_enable(struct device *device, bool enable)
+#define HID_EVENT_FILTER_UUID "eeec56b3-4442-408f-a792-4edd4d758054"
+
+enum intel_hid_dsm_fn_codes {
+ INTEL_HID_DSM_FN_INVALID,
+ INTEL_HID_DSM_BTNL_FN,
+ INTEL_HID_DSM_HDMM_FN,
+ INTEL_HID_DSM_HDSM_FN,
+ INTEL_HID_DSM_HDEM_FN,
+ INTEL_HID_DSM_BTNS_FN,
+ INTEL_HID_DSM_BTNE_FN,
+ INTEL_HID_DSM_HEBC_V1_FN,
+ INTEL_HID_DSM_VGBS_FN,
+ INTEL_HID_DSM_HEBC_V2_FN,
+ INTEL_HID_DSM_FN_MAX
+};
+
+static const char *intel_hid_dsm_fn_to_method[INTEL_HID_DSM_FN_MAX] = {
+ NULL,
+ "BTNL",
+ "HDMM",
+ "HDSM",
+ "HDEM",
+ "BTNS",
+ "BTNE",
+ "HEBC",
+ "VGBS",
+ "HEBC"
+};
+
+static unsigned long long intel_hid_dsm_fn_mask;
+static guid_t intel_dsm_guid;
+
+static bool intel_hid_execute_method(acpi_handle handle,
+ enum intel_hid_dsm_fn_codes fn_index,
+ unsigned long long arg)
{
+ union acpi_object *obj, argv4, req;
acpi_status status;
+ char *method_name;
- status = acpi_execute_simple_method(ACPI_HANDLE(device), "HDSM",
- enable);
- if (ACPI_FAILURE(status)) {
+ if (fn_index <= INTEL_HID_DSM_FN_INVALID ||
+ fn_index >= INTEL_HID_DSM_FN_MAX)
+ return false;
+
+ method_name = (char *)intel_hid_dsm_fn_to_method[fn_index];
+
+ if (!(intel_hid_dsm_fn_mask & fn_index))
+ goto skip_dsm_exec;
+
+ /* All methods expects a package with one integer element */
+ req.type = ACPI_TYPE_INTEGER;
+ req.integer.value = arg;
+
+ argv4.type = ACPI_TYPE_PACKAGE;
+ argv4.package.count = 1;
+ argv4.package.elements = &req;
+
+ obj = acpi_evaluate_dsm(handle, &intel_dsm_guid, 1, fn_index, &argv4);
+ if (obj) {
+ acpi_handle_debug(handle, "Exec DSM Fn code: %d[%s] success\n",
+ fn_index, method_name);
+ ACPI_FREE(obj);
+ return true;
+ }
+
+skip_dsm_exec:
+ status = acpi_execute_simple_method(handle, method_name, arg);
+ if (ACPI_SUCCESS(status))
+ return true;
+
+ return false;
+}
+
+static bool intel_hid_evaluate_method(acpi_handle handle,
+ enum intel_hid_dsm_fn_codes fn_index,
+ unsigned long long *result)
+{
+ union acpi_object *obj;
+ acpi_status status;
+ char *method_name;
+
+ if (fn_index <= INTEL_HID_DSM_FN_INVALID ||
+ fn_index >= INTEL_HID_DSM_FN_MAX)
+ return false;
+
+ method_name = (char *)intel_hid_dsm_fn_to_method[fn_index];
+
+ if (!(intel_hid_dsm_fn_mask & fn_index))
+ goto skip_dsm_eval;
+
+ obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid,
+ 1, fn_index,
+ NULL, ACPI_TYPE_INTEGER);
+ if (obj) {
+ *result = obj->integer.value;
+ acpi_handle_debug(handle,
+ "Eval DSM Fn code: %d[%s] results: 0x%llx\n",
+ fn_index, method_name, *result);
+ ACPI_FREE(obj);
+ return true;
+ }
+
+skip_dsm_eval:
+ status = acpi_evaluate_integer(handle, method_name, NULL, result);
+ if (ACPI_SUCCESS(status))
+ return true;
+
+ return false;
+}
+
+static void intel_hid_init_dsm(acpi_handle handle)
+{
+ union acpi_object *obj;
+
+ guid_parse(HID_EVENT_FILTER_UUID, &intel_dsm_guid);
+
+ obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid, 1, 0, NULL,
+ ACPI_TYPE_BUFFER);
+ if (obj) {
+ intel_hid_dsm_fn_mask = *obj->buffer.pointer;
+ ACPI_FREE(obj);
+ }
+
+ acpi_handle_debug(handle, "intel_hid_dsm_fn_mask = %llx\n",
+ intel_hid_dsm_fn_mask);
+}
+
+static int intel_hid_set_enable(struct device *device, bool enable)
+{
+ acpi_handle handle = ACPI_HANDLE(device);
+
+ /* Enable|disable features - power button is always enabled */
+ if (!intel_hid_execute_method(handle, INTEL_HID_DSM_HDSM_FN,
+ enable)) {
dev_warn(device, "failed to %sable hotkeys\n",
enable ? "en" : "dis");
return -EIO;
@@ -129,9 +256,8 @@ static void intel_button_array_enable(struct device *device, bool enable)
}
/* Enable|disable features - power button is always enabled */
- status = acpi_execute_simple_method(handle, "BTNE",
- enable ? button_cap : 1);
- if (ACPI_FAILURE(status))
+ if (!intel_hid_execute_method(handle, INTEL_HID_DSM_BTNE_FN,
+ enable ? button_cap : 1))
dev_warn(device, "failed to set button capability\n");
}
@@ -217,7 +343,6 @@ static void notify_handler(acpi_handle handle, u32 event, void *context)
struct platform_device *device = context;
struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
unsigned long long ev_index;
- acpi_status status;
if (priv->wakeup_mode) {
/*
@@ -269,8 +394,8 @@ wakeup:
return;
}
- status = acpi_evaluate_integer(handle, "HDEM", NULL, &ev_index);
- if (ACPI_FAILURE(status)) {
+ if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_HDEM_FN,
+ &ev_index)) {
dev_warn(&device->dev, "failed to get event index\n");
return;
}
@@ -284,17 +409,24 @@ static bool button_array_present(struct platform_device *device)
{
acpi_handle handle = ACPI_HANDLE(&device->dev);
unsigned long long event_cap;
- acpi_status status;
- bool supported = false;
- status = acpi_evaluate_integer(handle, "HEBC", NULL, &event_cap);
- if (ACPI_SUCCESS(status) && (event_cap & 0x20000))
- supported = true;
+ if (intel_hid_evaluate_method(handle, INTEL_HID_DSM_HEBC_V2_FN,
+ &event_cap)) {
+ /* Check presence of 5 button array or v2 power button */
+ if (event_cap & 0x60000)
+ return true;
+ }
+
+ if (intel_hid_evaluate_method(handle, INTEL_HID_DSM_HEBC_V1_FN,
+ &event_cap)) {
+ if (event_cap & 0x20000)
+ return true;
+ }
if (dmi_check_system(button_array_table))
- supported = true;
+ return true;
- return supported;
+ return false;
}
static int intel_hid_probe(struct platform_device *device)
@@ -305,8 +437,9 @@ static int intel_hid_probe(struct platform_device *device)
acpi_status status;
int err;
- status = acpi_evaluate_integer(handle, "HDMM", NULL, &mode);
- if (ACPI_FAILURE(status)) {
+ intel_hid_init_dsm(handle);
+
+ if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_HDMM_FN, &mode)) {
dev_warn(&device->dev, "failed to read mode\n");
return -ENODEV;
}
@@ -352,13 +485,16 @@ static int intel_hid_probe(struct platform_device *device)
goto err_remove_notify;
if (priv->array) {
+ unsigned long long dummy;
+
intel_button_array_enable(&device->dev, true);
/* Call button load method to enable HID power button */
- status = acpi_evaluate_object(handle, "BTNL", NULL, NULL);
- if (ACPI_FAILURE(status))
+ if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_BTNL_FN,
+ &dummy)) {
dev_warn(&device->dev,
"failed to enable HID power button\n");
+ }
}
device_init_wakeup(&device->dev, true);
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