[net-next-2.6.git] / drivers / gpu / drm / nouveau / nouveau_acpi.c

#include <linux/pci.h>
#include <linux/acpi.h>
#include <linux/slab.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>

#include "drmP.h"
#include "drm.h"
#include "drm_sarea.h"
#include "drm_crtc_helper.h"
#include "nouveau_drv.h"
#include "nouveau_drm.h"
#include "nv50_display.h"

#include <linux/vga_switcheroo.h>

#define NOUVEAU_DSM_SUPPORTED 0x00
#define NOUVEAU_DSM_SUPPORTED_FUNCTIONS 0x00

#define NOUVEAU_DSM_ACTIVE 0x01
#define NOUVEAU_DSM_ACTIVE_QUERY 0x00

#define NOUVEAU_DSM_LED 0x02
#define NOUVEAU_DSM_LED_STATE 0x00
#define NOUVEAU_DSM_LED_OFF 0x10
#define NOUVEAU_DSM_LED_STAMINA 0x11
#define NOUVEAU_DSM_LED_SPEED 0x12

#define NOUVEAU_DSM_POWER 0x03
#define NOUVEAU_DSM_POWER_STATE 0x00
#define NOUVEAU_DSM_POWER_SPEED 0x01
#define NOUVEAU_DSM_POWER_STAMINA 0x02

static struct nouveau_dsm_priv {
	bool dsm_detected;
	acpi_handle dhandle;
	acpi_handle dsm_handle;
	acpi_handle rom_handle;
} nouveau_dsm_priv;

static const char nouveau_dsm_muid[] = {
	0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D,
	0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4,
};

static int nouveau_dsm(acpi_handle handle, int func, int arg, int *result)
{
	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
	struct acpi_object_list input;
	union acpi_object params[4];
	union acpi_object *obj;
	int err;

	input.count = 4;
	input.pointer = params;
	params[0].type = ACPI_TYPE_BUFFER;
	params[0].buffer.length = sizeof(nouveau_dsm_muid);
	params[0].buffer.pointer = (char *)nouveau_dsm_muid;
	params[1].type = ACPI_TYPE_INTEGER;
	params[1].integer.value = 0x00000102;
	params[2].type = ACPI_TYPE_INTEGER;
	params[2].integer.value = func;
	params[3].type = ACPI_TYPE_INTEGER;
	params[3].integer.value = arg;

	err = acpi_evaluate_object(handle, "_DSM", &input, &output);
	if (err) {
		printk(KERN_INFO "failed to evaluate _DSM: %d\n", err);
		return err;
	}

	obj = (union acpi_object *)output.pointer;

	if (obj->type == ACPI_TYPE_INTEGER)
		if (obj->integer.value == 0x80000002)
			return -ENODEV;

	if (obj->type == ACPI_TYPE_BUFFER) {
		if (obj->buffer.length == 4 && result) {
			*result = 0;
			*result |= obj->buffer.pointer[0];
			*result |= (obj->buffer.pointer[1] << 8);
			*result |= (obj->buffer.pointer[2] << 16);
			*result |= (obj->buffer.pointer[3] << 24);
		}
	}

	kfree(output.pointer);
	return 0;
}

static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id)
{
	return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id, NULL);
}

static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switcheroo_state state)
{
	int arg;
	if (state == VGA_SWITCHEROO_ON)
		arg = NOUVEAU_DSM_POWER_SPEED;
	else
		arg = NOUVEAU_DSM_POWER_STAMINA;
	nouveau_dsm(handle, NOUVEAU_DSM_POWER, arg, NULL);
	return 0;
}

static int nouveau_dsm_switchto(enum vga_switcheroo_client_id id)
{
	if (id == VGA_SWITCHEROO_IGD)
		return nouveau_dsm_switch_mux(nouveau_dsm_priv.dsm_handle, NOUVEAU_DSM_LED_STAMINA);
	else
		return nouveau_dsm_switch_mux(nouveau_dsm_priv.dsm_handle, NOUVEAU_DSM_LED_SPEED);
}

static int nouveau_dsm_power_state(enum vga_switcheroo_client_id id,
				   enum vga_switcheroo_state state)
{
	if (id == VGA_SWITCHEROO_IGD)
		return 0;

	return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dsm_handle, state);
}

static int nouveau_dsm_init(void)
{
	return 0;
}

static int nouveau_dsm_get_client_id(struct pci_dev *pdev)
{
	if (nouveau_dsm_priv.dhandle == DEVICE_ACPI_HANDLE(&pdev->dev))
		return VGA_SWITCHEROO_IGD;
	else
		return VGA_SWITCHEROO_DIS;
}

static struct vga_switcheroo_handler nouveau_dsm_handler = {
	.switchto = nouveau_dsm_switchto,
	.power_state = nouveau_dsm_power_state,
	.init = nouveau_dsm_init,
	.get_client_id = nouveau_dsm_get_client_id,
};

static bool nouveau_dsm_pci_probe(struct pci_dev *pdev)
{
	acpi_handle dhandle, nvidia_handle;
	acpi_status status;
	int ret;
	uint32_t result;

	dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
	if (!dhandle)
		return false;

	status = acpi_get_handle(dhandle, "_DSM", &nvidia_handle);
	if (ACPI_FAILURE(status)) {
		return false;
	}

	ret = nouveau_dsm(nvidia_handle, NOUVEAU_DSM_SUPPORTED,
			 NOUVEAU_DSM_SUPPORTED_FUNCTIONS, &result);
	if (ret < 0)
		return false;

	nouveau_dsm_priv.dhandle = dhandle;
	nouveau_dsm_priv.dsm_handle = nvidia_handle;
	return true;
}

static bool nouveau_dsm_detect(void)
{
	char acpi_method_name[255] = { 0 };
	struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
	struct pci_dev *pdev = NULL;
	int has_dsm = 0;
	int vga_count = 0;

	while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
		vga_count++;

		has_dsm |= (nouveau_dsm_pci_probe(pdev) == true);
	}

	if (vga_count == 2 && has_dsm) {
		acpi_get_name(nouveau_dsm_priv.dsm_handle, ACPI_FULL_PATHNAME, &buffer);
		printk(KERN_INFO "VGA switcheroo: detected DSM switching method %s handle\n",
		       acpi_method_name);
		nouveau_dsm_priv.dsm_detected = true;
		return true;
	}
	return false;
}

void nouveau_register_dsm_handler(void)
{
	bool r;

	r = nouveau_dsm_detect();
	if (!r)
		return;

	vga_switcheroo_register_handler(&nouveau_dsm_handler);
}

void nouveau_unregister_dsm_handler(void)
{
	vga_switcheroo_unregister_handler();
}

/* retrieve the ROM in 4k blocks */
static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios,
			    int offset, int len)
{
	acpi_status status;
	union acpi_object rom_arg_elements[2], *obj;
	struct acpi_object_list rom_arg;
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};

	rom_arg.count = 2;
	rom_arg.pointer = &rom_arg_elements[0];

	rom_arg_elements[0].type = ACPI_TYPE_INTEGER;
	rom_arg_elements[0].integer.value = offset;

	rom_arg_elements[1].type = ACPI_TYPE_INTEGER;
	rom_arg_elements[1].integer.value = len;

	status = acpi_evaluate_object(rom_handle, NULL, &rom_arg, &buffer);
	if (ACPI_FAILURE(status)) {
		printk(KERN_INFO "failed to evaluate ROM got %s\n", acpi_format_exception(status));
		return -ENODEV;
	}
	obj = (union acpi_object *)buffer.pointer;
	memcpy(bios+offset, obj->buffer.pointer, len);
	kfree(buffer.pointer);
	return len;
}

bool nouveau_acpi_rom_supported(struct pci_dev *pdev)
{
	acpi_status status;
	acpi_handle dhandle, rom_handle;

	if (!nouveau_dsm_priv.dsm_detected)
		return false;

	dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
	if (!dhandle)
		return false;

	status = acpi_get_handle(dhandle, "_ROM", &rom_handle);
	if (ACPI_FAILURE(status))
		return false;

	nouveau_dsm_priv.rom_handle = rom_handle;
	return true;
}

int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len)
{
	return nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset, len);
}
Commit	Line	Data
6ee73861 BS	1	#include <linux/pci.h>
6ee73861 BS	2	#include <linux/acpi.h>
5a0e3ad6	3	#include <linux/slab.h>
6ee73861 BS	4	#include <acpi/acpi_drivers.h>
	5	#include <acpi/acpi_bus.h>
	6
	7	#include "drmP.h"
	8	#include "drm.h"
	9	#include "drm_sarea.h"
	10	#include "drm_crtc_helper.h"
	11	#include "nouveau_drv.h"
	12	#include "nouveau_drm.h"
	13	#include "nv50_display.h"
	14
6a9ee8af DA	15	#include <linux/vga_switcheroo.h>
6a9ee8af DA	16
6ee73861 BS	17	#define NOUVEAU_DSM_SUPPORTED 0x00
	18	#define NOUVEAU_DSM_SUPPORTED_FUNCTIONS 0x00
	19
	20	#define NOUVEAU_DSM_ACTIVE 0x01
	21	#define NOUVEAU_DSM_ACTIVE_QUERY 0x00
	22
	23	#define NOUVEAU_DSM_LED 0x02
	24	#define NOUVEAU_DSM_LED_STATE 0x00
	25	#define NOUVEAU_DSM_LED_OFF 0x10
	26	#define NOUVEAU_DSM_LED_STAMINA 0x11
	27	#define NOUVEAU_DSM_LED_SPEED 0x12
	28
	29	#define NOUVEAU_DSM_POWER 0x03
	30	#define NOUVEAU_DSM_POWER_STATE 0x00
	31	#define NOUVEAU_DSM_POWER_SPEED 0x01
	32	#define NOUVEAU_DSM_POWER_STAMINA 0x02
	33
6a9ee8af DA	34	static struct nouveau_dsm_priv {
	35	bool dsm_detected;
	36	acpi_handle dhandle;
	37	acpi_handle dsm_handle;
afeb3e11	38	acpi_handle rom_handle;
6a9ee8af DA	39	} nouveau_dsm_priv;
	40
	41	static const char nouveau_dsm_muid[] = {
	42	0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D,
	43	0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4,
	44	};
6ee73861	45
6a9ee8af DA	46	static int nouveau_dsm(acpi_handle handle, int func, int arg, int *result)
6a9ee8af DA	47	{
6ee73861 BS	48	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
	49	struct acpi_object_list input;
	50	union acpi_object params[4];
	51	union acpi_object *obj;
	52	int err;
	53
6ee73861 BS	54	input.count = 4;
	55	input.pointer = params;
	56	params[0].type = ACPI_TYPE_BUFFER;
6a9ee8af DA	57	params[0].buffer.length = sizeof(nouveau_dsm_muid);
6a9ee8af DA	58	params[0].buffer.pointer = (char *)nouveau_dsm_muid;
6ee73861 BS	59	params[1].type = ACPI_TYPE_INTEGER;
	60	params[1].integer.value = 0x00000102;
	61	params[2].type = ACPI_TYPE_INTEGER;
	62	params[2].integer.value = func;
	63	params[3].type = ACPI_TYPE_INTEGER;
	64	params[3].integer.value = arg;
	65
	66	err = acpi_evaluate_object(handle, "_DSM", &input, &output);
	67	if (err) {
6a9ee8af	68	printk(KERN_INFO "failed to evaluate _DSM: %d\n", err);
6ee73861 BS	69	return err;
	70	}
	71
	72	obj = (union acpi_object *)output.pointer;
	73
	74	if (obj->type == ACPI_TYPE_INTEGER)
	75	if (obj->integer.value == 0x80000002)
	76	return -ENODEV;
	77
	78	if (obj->type == ACPI_TYPE_BUFFER) {
	79	if (obj->buffer.length == 4 && result) {
	80	*result = 0;
	81	*result \|= obj->buffer.pointer[0];
	82	*result \|= (obj->buffer.pointer[1] << 8);
	83	*result \|= (obj->buffer.pointer[2] << 16);
	84	*result \|= (obj->buffer.pointer[3] << 24);
	85	}
	86	}
	87
	88	kfree(output.pointer);
	89	return 0;
	90	}
	91
6a9ee8af	92	static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id)
6ee73861	93	{
6a9ee8af DA	94	return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id, NULL);
	95	}
	96
	97	static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switcheroo_state state)
	98	{
	99	int arg;
	100	if (state == VGA_SWITCHEROO_ON)
	101	arg = NOUVEAU_DSM_POWER_SPEED;
	102	else
	103	arg = NOUVEAU_DSM_POWER_STAMINA;
	104	nouveau_dsm(handle, NOUVEAU_DSM_POWER, arg, NULL);
	105	return 0;
	106	}
	107
	108	static int nouveau_dsm_switchto(enum vga_switcheroo_client_id id)
	109	{
	110	if (id == VGA_SWITCHEROO_IGD)
	111	return nouveau_dsm_switch_mux(nouveau_dsm_priv.dsm_handle, NOUVEAU_DSM_LED_STAMINA);
	112	else
	113	return nouveau_dsm_switch_mux(nouveau_dsm_priv.dsm_handle, NOUVEAU_DSM_LED_SPEED);
	114	}
6ee73861	115
6a9ee8af DA	116	static int nouveau_dsm_power_state(enum vga_switcheroo_client_id id,
	117	enum vga_switcheroo_state state)
	118	{
	119	if (id == VGA_SWITCHEROO_IGD)
	120	return 0;
	121
	122	return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dsm_handle, state);
	123	}
	124
	125	static int nouveau_dsm_init(void)
	126	{
6ee73861 BS	127	return 0;
	128	}
	129
6a9ee8af	130	static int nouveau_dsm_get_client_id(struct pci_dev *pdev)
6ee73861	131	{
6a9ee8af DA	132	if (nouveau_dsm_priv.dhandle == DEVICE_ACPI_HANDLE(&pdev->dev))
	133	return VGA_SWITCHEROO_IGD;
	134	else
	135	return VGA_SWITCHEROO_DIS;
	136	}
	137
	138	static struct vga_switcheroo_handler nouveau_dsm_handler = {
	139	.switchto = nouveau_dsm_switchto,
	140	.power_state = nouveau_dsm_power_state,
	141	.init = nouveau_dsm_init,
	142	.get_client_id = nouveau_dsm_get_client_id,
	143	};
6ee73861	144
6a9ee8af DA	145	static bool nouveau_dsm_pci_probe(struct pci_dev *pdev)
	146	{
	147	acpi_handle dhandle, nvidia_handle;
	148	acpi_status status;
	149	int ret;
	150	uint32_t result;
	151
	152	dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
	153	if (!dhandle)
	154	return false;
afeb3e11	155
6a9ee8af DA	156	status = acpi_get_handle(dhandle, "_DSM", &nvidia_handle);
6a9ee8af DA	157	if (ACPI_FAILURE(status)) {
6ee73861	158	return false;
6a9ee8af	159	}
6ee73861	160
afeb3e11	161	ret = nouveau_dsm(nvidia_handle, NOUVEAU_DSM_SUPPORTED,
6a9ee8af DA	162	NOUVEAU_DSM_SUPPORTED_FUNCTIONS, &result);
6a9ee8af DA	163	if (ret < 0)
6ee73861 BS	164	return false;
6ee73861 BS	165
6a9ee8af DA	166	nouveau_dsm_priv.dhandle = dhandle;
6a9ee8af DA	167	nouveau_dsm_priv.dsm_handle = nvidia_handle;
6ee73861 BS	168	return true;
6ee73861 BS	169	}
6a9ee8af DA	170
	171	static bool nouveau_dsm_detect(void)
	172	{
	173	char acpi_method_name[255] = { 0 };
	174	struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
	175	struct pci_dev *pdev = NULL;
	176	int has_dsm = 0;
	177	int vga_count = 0;
afeb3e11	178
6a9ee8af DA	179	while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
	180	vga_count++;
	181
	182	has_dsm \|= (nouveau_dsm_pci_probe(pdev) == true);
	183	}
	184
	185	if (vga_count == 2 && has_dsm) {
	186	acpi_get_name(nouveau_dsm_priv.dsm_handle, ACPI_FULL_PATHNAME, &buffer);
	187	printk(KERN_INFO "VGA switcheroo: detected DSM switching method %s handle\n",
	188	acpi_method_name);
	189	nouveau_dsm_priv.dsm_detected = true;
	190	return true;
	191	}
	192	return false;
	193	}
	194
	195	void nouveau_register_dsm_handler(void)
	196	{
	197	bool r;
	198
	199	r = nouveau_dsm_detect();
	200	if (!r)
	201	return;
	202
	203	vga_switcheroo_register_handler(&nouveau_dsm_handler);
	204	}
	205
	206	void nouveau_unregister_dsm_handler(void)
	207	{
	208	vga_switcheroo_unregister_handler();
	209	}
afeb3e11 DA	210
	211	/* retrieve the ROM in 4k blocks */
	212	static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios,
	213	int offset, int len)
	214	{
	215	acpi_status status;
	216	union acpi_object rom_arg_elements[2], *obj;
	217	struct acpi_object_list rom_arg;
	218	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
	219
	220	rom_arg.count = 2;
	221	rom_arg.pointer = &rom_arg_elements[0];
	222
	223	rom_arg_elements[0].type = ACPI_TYPE_INTEGER;
	224	rom_arg_elements[0].integer.value = offset;
	225
	226	rom_arg_elements[1].type = ACPI_TYPE_INTEGER;
	227	rom_arg_elements[1].integer.value = len;
	228
	229	status = acpi_evaluate_object(rom_handle, NULL, &rom_arg, &buffer);
	230	if (ACPI_FAILURE(status)) {
	231	printk(KERN_INFO "failed to evaluate ROM got %s\n", acpi_format_exception(status));
	232	return -ENODEV;
	233	}
	234	obj = (union acpi_object *)buffer.pointer;
	235	memcpy(bios+offset, obj->buffer.pointer, len);
	236	kfree(buffer.pointer);
	237	return len;
	238	}
	239
	240	bool nouveau_acpi_rom_supported(struct pci_dev *pdev)
	241	{
	242	acpi_status status;
	243	acpi_handle dhandle, rom_handle;
	244
	245	if (!nouveau_dsm_priv.dsm_detected)
	246	return false;
	247
	248	dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
	249	if (!dhandle)
	250	return false;
	251
	252	status = acpi_get_handle(dhandle, "_ROM", &rom_handle);
	253	if (ACPI_FAILURE(status))
	254	return false;
	255
	256	nouveau_dsm_priv.rom_handle = rom_handle;
	257	return true;
	258	}
	259
	260	int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len)
	261	{
	262	return nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset, len);
	263	}