diff options
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci-acpi.c | 73 |
1 files changed, 39 insertions, 34 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 032b3268018b..b1bd6e6155a3 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -21,12 +21,18 @@ struct acpi_osc_data { acpi_handle handle; - u32 ctrlset_buf[3]; - u32 global_ctrlsets; + u32 support_set; + u32 control_set; + u32 query_result; struct list_head sibiling; }; static LIST_HEAD(acpi_osc_data_list); +struct acpi_osc_args { + u32 capbuf[3]; + u32 query_result; +}; + static struct acpi_osc_data *acpi_get_osc_data(acpi_handle handle) { struct acpi_osc_data *data; @@ -47,14 +53,14 @@ static struct acpi_osc_data *acpi_get_osc_data(acpi_handle handle) static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40, 0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66}; static acpi_status acpi_run_osc(acpi_handle handle, - struct acpi_osc_data *osc_data) + struct acpi_osc_args *osc_args) { acpi_status status; struct acpi_object_list input; union acpi_object in_params[4]; struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; union acpi_object *out_obj; - u32 osc_dw0, flags = osc_data->ctrlset_buf[OSC_QUERY_TYPE]; + u32 osc_dw0, flags = osc_args->capbuf[OSC_QUERY_TYPE]; /* Setting up input parameters */ input.count = 4; @@ -68,7 +74,7 @@ static acpi_status acpi_run_osc(acpi_handle handle, in_params[2].integer.value = 3; in_params[3].type = ACPI_TYPE_BUFFER; in_params[3].buffer.length = 12; - in_params[3].buffer.pointer = (u8 *)osc_data->ctrlset_buf; + in_params[3].buffer.pointer = (u8 *)osc_args->capbuf; status = acpi_evaluate_object(handle, "_OSC", &input, &output); if (ACPI_FAILURE(status)) @@ -99,11 +105,9 @@ static acpi_status acpi_run_osc(acpi_handle handle, goto out_kfree; } out_success: - if (flags & OSC_QUERY_ENABLE) { - /* Update Global Control Set */ - osc_data->global_ctrlsets = + if (flags & OSC_QUERY_ENABLE) + osc_args->query_result = *((u32 *)(out_obj->buffer.pointer + 8)); - } status = AE_OK; out_kfree: @@ -117,8 +121,9 @@ static acpi_status acpi_query_osc(acpi_handle handle, acpi_status status; acpi_status *ret_status = (acpi_status *)retval; struct acpi_osc_data *osc_data; - u32 flags = (unsigned long)context, temp; + u32 flags = (unsigned long)context, support_set; acpi_handle tmp; + struct acpi_osc_args osc_args; status = acpi_get_handle(handle, "_OSC", &tmp); if (ACPI_FAILURE(status)) @@ -130,21 +135,18 @@ static acpi_status acpi_query_osc(acpi_handle handle, return AE_ERROR; } - osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] |= (flags & OSC_SUPPORT_MASKS); - /* do _OSC query for all possible controls */ - temp = osc_data->ctrlset_buf[OSC_CONTROL_TYPE]; - osc_data->ctrlset_buf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; - osc_data->ctrlset_buf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS; + support_set = osc_data->support_set | (flags & OSC_SUPPORT_MASKS); + osc_args.capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; + osc_args.capbuf[OSC_SUPPORT_TYPE] = support_set; + osc_args.capbuf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS; - status = acpi_run_osc(handle, osc_data); + status = acpi_run_osc(handle, &osc_args); *ret_status = status; - osc_data->ctrlset_buf[OSC_QUERY_TYPE] = !OSC_QUERY_ENABLE; - osc_data->ctrlset_buf[OSC_CONTROL_TYPE] = temp; - if (ACPI_FAILURE(status)) { - /* no osc support at all */ - osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] = 0; + if (ACPI_SUCCESS(status)) { + osc_data->support_set = support_set; + osc_data->query_result = osc_args.query_result; } return status; @@ -181,10 +183,11 @@ acpi_status __pci_osc_support_set(u32 flags, const char *hid) **/ acpi_status pci_osc_control_set(acpi_handle handle, u32 flags) { - acpi_status status; - u32 ctrlset; + acpi_status status; + u32 ctrlset, control_set; acpi_handle tmp; struct acpi_osc_data *osc_data; + struct acpi_osc_args osc_args; status = acpi_get_handle(handle, "_OSC", &tmp); if (ACPI_FAILURE(status)) @@ -197,19 +200,21 @@ acpi_status pci_osc_control_set(acpi_handle handle, u32 flags) } ctrlset = (flags & OSC_CONTROL_MASKS); - if (!ctrlset) { + if (!ctrlset) return AE_TYPE; - } - if (osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] && - ((osc_data->global_ctrlsets & ctrlset) != ctrlset)) { + + if (osc_data->support_set && + ((osc_data->query_result & ctrlset) != ctrlset)) return AE_SUPPORT; - } - osc_data->ctrlset_buf[OSC_CONTROL_TYPE] |= ctrlset; - status = acpi_run_osc(handle, osc_data); - if (ACPI_FAILURE (status)) { - osc_data->ctrlset_buf[OSC_CONTROL_TYPE] &= ~ctrlset; - } - + + control_set = osc_data->control_set | ctrlset; + osc_args.capbuf[OSC_QUERY_TYPE] = 0; + osc_args.capbuf[OSC_SUPPORT_TYPE] = osc_data->support_set; + osc_args.capbuf[OSC_CONTROL_TYPE] = control_set; + status = acpi_run_osc(handle, &osc_args); + if (ACPI_SUCCESS(status)) + osc_data->control_set = control_set; + return status; } EXPORT_SYMBOL(pci_osc_control_set); |