static int pega_int_read(struct asus_laptop *asus, int arg, int *result)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
int err = write_acpi_int_ret(asus->handle, METHOD_PEGA_READ, arg,
&buffer);
if (!err) {
union acpi_object *obj = buffer.pointer;
if (obj && obj->type == ACPI_TYPE_INTEGER)
*result = obj->integer.value;
else
err = -EIO;
}
return err;
}
static int write_acpi_int(acpi_handle handle, const char *method, int val)
{
return write_acpi_int_ret(handle, method, val, NULL);
}
/*
* This function is used to initialize the context with right values. In this
* method, we can make all the detection we want, and modify the asus_laptop
* struct
*/
static int asus_laptop_get_info(struct asus_laptop *asus)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *model = NULL;
unsigned long long bsts_result, hwrs_result;
char *string = NULL;
acpi_status status;
/*
* Get DSDT headers early enough to allow for differentiating between
* models, but late enough to allow acpi_bus_register_driver() to fail
* before doing anything ACPI-specific. Should we encounter a machine,
* which needs special handling (i.e. its hotkey device has a different
* HID), this bit will be moved.
*/
status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus->dsdt_info);
if (ACPI_FAILURE(status))
pr_warning("Couldn't get the DSDT table header\n");
/* We have to write 0 on init this far for all ASUS models */
if (write_acpi_int_ret(asus->handle, "INIT", 0, &buffer)) {
pr_err("Hotkey initialization failed\n");
return -ENODEV;
}
/* This needs to be called for some laptops to init properly */
status =
acpi_evaluate_integer(asus->handle, "BSTS", NULL, &bsts_result);
if (ACPI_FAILURE(status))
pr_warning("Error calling BSTS\n");
else if (bsts_result)
pr_notice("BSTS called, 0x%02x returned\n",
(uint) bsts_result);
/* This too ... */
if (write_acpi_int(asus->handle, "CWAP", wapf))
pr_err("Error calling CWAP(%d)\n", wapf);
/*
* Try to match the object returned by INIT to the specific model.
* Handle every possible object (or the lack of thereof) the DSDT
* writers might throw at us. When in trouble, we pass NULL to
* asus_model_match() and try something completely different.
*/
if (buffer.pointer) {
model = buffer.pointer;
switch (model->type) {
case ACPI_TYPE_STRING:
string = model->string.pointer;
break;
case ACPI_TYPE_BUFFER:
string = model->buffer.pointer;
break;
default:
string = "";
break;
}
}
asus->name = kstrdup(string, GFP_KERNEL);
if (!asus->name) {
kfree(buffer.pointer);
return -ENOMEM;
}
if (*string)
pr_notice(" %s model detected\n", string);
/*
* The HWRS method return informations about the hardware.
* 0x80 bit is for WLAN, 0x100 for Bluetooth.
* The significance of others is yet to be found.
*/
status =
acpi_evaluate_integer(asus->handle, "HRWS", NULL, &hwrs_result);
if (!ACPI_FAILURE(status))
pr_notice(" HRWS returned %x", (int)hwrs_result);
if (!acpi_check_handle(asus->handle, METHOD_WL_STATUS, NULL))
asus->have_rsts = true;
/* Scheduled for removal */
ASUS_HANDLE_INIT(lcd_switch);
ASUS_HANDLE_INIT(display_get);
kfree(model);
return AE_OK;
}
static int asus_laptop_get_info(struct asus_laptop *asus)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *model = NULL;
unsigned long long bsts_result, hwrs_result;
char *string = NULL;
acpi_status status;
status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus->dsdt_info);
if (ACPI_FAILURE(status))
pr_warn("Couldn't get the DSDT table header\n");
if (write_acpi_int_ret(asus->handle, "INIT", 0, &buffer)) {
pr_err("Hotkey initialization failed\n");
return -ENODEV;
}
status =
acpi_evaluate_integer(asus->handle, "BSTS", NULL, &bsts_result);
if (ACPI_FAILURE(status))
pr_warn("Error calling BSTS\n");
else if (bsts_result)
pr_notice("BSTS called, 0x%02x returned\n",
(uint) bsts_result);
if (write_acpi_int(asus->handle, "CWAP", wapf))
pr_err("Error calling CWAP(%d)\n", wapf);
if (buffer.pointer) {
model = buffer.pointer;
switch (model->type) {
case ACPI_TYPE_STRING:
string = model->string.pointer;
break;
case ACPI_TYPE_BUFFER:
string = model->buffer.pointer;
break;
default:
string = "";
break;
}
}
asus->name = kstrdup(string, GFP_KERNEL);
if (!asus->name) {
kfree(buffer.pointer);
return -ENOMEM;
}
if (*string)
pr_notice(" %s model detected\n", string);
status =
acpi_evaluate_integer(asus->handle, "HWRS", NULL, &hwrs_result);
if (!ACPI_FAILURE(status))
pr_notice(" HWRS returned %x", (int)hwrs_result);
if (!acpi_check_handle(asus->handle, METHOD_WL_STATUS, NULL))
asus->have_rsts = true;
kfree(model);
return AE_OK;
}