Subversion Repositories Kolibri OS

/*

 * Copyright 2008 Advanced Micro Devices, Inc.

 * Copyright 2008 Red Hat Inc.

 * Copyright 2009 Jerome Glisse.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR

 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

 * OTHER DEALINGS IN THE SOFTWARE.

 *

 * Authors: Dave Airlie

 *          Alex Deucher

 *          Jerome Glisse

 */

#include 

#include "radeon_reg.h"

#include "radeon.h"

#include "atom.h"

#include 

/*

 * BIOS.

 */

/* If you boot an IGP board with a discrete card as the primary,

 * the IGP rom is not accessible via the rom bar as the IGP rom is

 * part of the system bios.  On boot, the system bios puts a

 * copy of the igp rom at the start of vram if a discrete card is

 * present.

 */

static bool igp_read_bios_from_vram(struct radeon_device *rdev)

{

	uint8_t __iomem *bios;

	resource_size_t vram_base;

	resource_size_t size = 256 * 1024; /* ??? */

	if (!(rdev->flags & RADEON_IS_IGP))

		if (!radeon_card_posted(rdev))

			return false;

	rdev->bios = NULL;

	vram_base = pci_resource_start(rdev->pdev, 0);

	bios = ioremap(vram_base, size);

	if (!bios) {

		return false;

	}

	if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) {

		iounmap(bios);

		return false;

	}

	rdev->bios = kmalloc(size, GFP_KERNEL);

	if (rdev->bios == NULL) {

		iounmap(bios);

		return false;

	}

	memcpy(rdev->bios, bios, size);

	iounmap(bios);

	return true;

}

static bool radeon_read_bios(struct radeon_device *rdev)

{

	uint8_t __iomem *bios, val1, val2;

	size_t size;

	rdev->bios = NULL;

	/* XXX: some cards may return 0 for rom size? ddx has a workaround */

	bios = pci_map_rom(rdev->pdev, &size);

	if (!bios) {

		return false;

	}

	if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) {

//       pci_unmap_rom(rdev->pdev, bios);

		return false;

	}

	rdev->bios = kmalloc(size, GFP_KERNEL);

	if (rdev->bios == NULL) {

		return false;

	}

	memcpy(rdev->bios, bios, size);

	return true;

}

#ifdef CONFIG_ACPI

/* ATRM is used to get the BIOS on the discrete cards in

 * dual-gpu systems.

 */

/* retrieve the ROM in 4k blocks */

#define ATRM_BIOS_PAGE 4096

/**

 * radeon_atrm_call - fetch a chunk of the vbios

 *

 * @atrm_handle: acpi ATRM handle

 * @bios: vbios image pointer

 * @offset: offset of vbios image data to fetch

 * @len: length of vbios image data to fetch

 *

 * Executes ATRM to fetch a chunk of the discrete

 * vbios image on PX systems (all asics).

 * Returns the length of the buffer fetched.

 */

static int radeon_atrm_call(acpi_handle atrm_handle, uint8_t *bios,

			    int offset, int len)

{

	acpi_status status;

	union acpi_object atrm_arg_elements[2], *obj;

	struct acpi_object_list atrm_arg;

	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};

	atrm_arg.count = 2;

	atrm_arg.pointer = &atrm_arg_elements[0];

	atrm_arg_elements[0].type = ACPI_TYPE_INTEGER;

	atrm_arg_elements[0].integer.value = offset;

	atrm_arg_elements[1].type = ACPI_TYPE_INTEGER;

	atrm_arg_elements[1].integer.value = len;

	status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer);

	if (ACPI_FAILURE(status)) {

		printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status));

		return -ENODEV;

	}

	obj = (union acpi_object *)buffer.pointer;

	memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length);

	len = obj->buffer.length;

	kfree(buffer.pointer);

	return len;

}

static bool radeon_atrm_get_bios(struct radeon_device *rdev)

{

	int ret;

	int size = 256 * 1024;

	int i;

	struct pci_dev *pdev = NULL;

	acpi_handle dhandle, atrm_handle;

	acpi_status status;

	bool found = false;

	/* ATRM is for the discrete card only */

	if (rdev->flags & RADEON_IS_IGP)

		return false;

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

		dhandle = ACPI_HANDLE(&pdev->dev);

		if (!dhandle)

			continue;

		status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);

		if (!ACPI_FAILURE(status)) {

			found = true;

			break;

		}

	}

	if (!found)

		return false;

	rdev->bios = kmalloc(size, GFP_KERNEL);

	if (!rdev->bios) {

		DRM_ERROR("Unable to allocate bios\n");

		return false;

	}

	for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {

		ret = radeon_atrm_call(atrm_handle,

				       rdev->bios,

				       (i * ATRM_BIOS_PAGE),

				       ATRM_BIOS_PAGE);

		if (ret < ATRM_BIOS_PAGE)

			break;

	}

	if (i == 0 || rdev->bios[0] != 0x55 || rdev->bios[1] != 0xaa) {

		kfree(rdev->bios);

		return false;

	}

	return true;

}

#else

static inline bool radeon_atrm_get_bios(struct radeon_device *rdev)

{

	return false;

}

#endif

static bool ni_read_disabled_bios(struct radeon_device *rdev)

{

	u32 bus_cntl;

	u32 d1vga_control;

	u32 d2vga_control;

	u32 vga_render_control;

	u32 rom_cntl;

	bool r;

	bus_cntl = RREG32(R600_BUS_CNTL);

	d1vga_control = RREG32(AVIVO_D1VGA_CONTROL);

	d2vga_control = RREG32(AVIVO_D2VGA_CONTROL);

	vga_render_control = RREG32(AVIVO_VGA_RENDER_CONTROL);

	rom_cntl = RREG32(R600_ROM_CNTL);

	/* enable the rom */

	WREG32(R600_BUS_CNTL, (bus_cntl & ~R600_BIOS_ROM_DIS));

	if (!ASIC_IS_NODCE(rdev)) {

		/* Disable VGA mode */

		WREG32(AVIVO_D1VGA_CONTROL,

		       (d1vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |

					  AVIVO_DVGA_CONTROL_TIMING_SELECT)));

		WREG32(AVIVO_D2VGA_CONTROL,

		       (d2vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |

					  AVIVO_DVGA_CONTROL_TIMING_SELECT)));

		WREG32(AVIVO_VGA_RENDER_CONTROL,

		       (vga_render_control & ~AVIVO_VGA_VSTATUS_CNTL_MASK));

	}

	WREG32(R600_ROM_CNTL, rom_cntl | R600_SCK_OVERWRITE);

	r = radeon_read_bios(rdev);

	/* restore regs */

	WREG32(R600_BUS_CNTL, bus_cntl);

	if (!ASIC_IS_NODCE(rdev)) {

		WREG32(AVIVO_D1VGA_CONTROL, d1vga_control);

		WREG32(AVIVO_D2VGA_CONTROL, d2vga_control);

		WREG32(AVIVO_VGA_RENDER_CONTROL, vga_render_control);

	}

	WREG32(R600_ROM_CNTL, rom_cntl);

	return r;

}

static bool r700_read_disabled_bios(struct radeon_device *rdev)

{

	uint32_t viph_control;

	uint32_t bus_cntl;

	uint32_t d1vga_control;

	uint32_t d2vga_control;

	uint32_t vga_render_control;

	uint32_t rom_cntl;

	uint32_t cg_spll_func_cntl = 0;

	uint32_t cg_spll_status;

	bool r;

	viph_control = RREG32(RADEON_VIPH_CONTROL);

	bus_cntl = RREG32(R600_BUS_CNTL);

	d1vga_control = RREG32(AVIVO_D1VGA_CONTROL);

	d2vga_control = RREG32(AVIVO_D2VGA_CONTROL);

	vga_render_control = RREG32(AVIVO_VGA_RENDER_CONTROL);

	rom_cntl = RREG32(R600_ROM_CNTL);

	/* disable VIP */

	WREG32(RADEON_VIPH_CONTROL, (viph_control & ~RADEON_VIPH_EN));

	/* enable the rom */

	WREG32(R600_BUS_CNTL, (bus_cntl & ~R600_BIOS_ROM_DIS));

	/* Disable VGA mode */

	WREG32(AVIVO_D1VGA_CONTROL,

	       (d1vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |

		AVIVO_DVGA_CONTROL_TIMING_SELECT)));

	WREG32(AVIVO_D2VGA_CONTROL,

	       (d2vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |

		AVIVO_DVGA_CONTROL_TIMING_SELECT)));

	WREG32(AVIVO_VGA_RENDER_CONTROL,

	       (vga_render_control & ~AVIVO_VGA_VSTATUS_CNTL_MASK));

	if (rdev->family == CHIP_RV730) {

		cg_spll_func_cntl = RREG32(R600_CG_SPLL_FUNC_CNTL);

		/* enable bypass mode */

		WREG32(R600_CG_SPLL_FUNC_CNTL, (cg_spll_func_cntl |

						R600_SPLL_BYPASS_EN));

		/* wait for SPLL_CHG_STATUS to change to 1 */

		cg_spll_status = 0;

		while (!(cg_spll_status & R600_SPLL_CHG_STATUS))

			cg_spll_status = RREG32(R600_CG_SPLL_STATUS);

		WREG32(R600_ROM_CNTL, (rom_cntl & ~R600_SCK_OVERWRITE));

	} else

		WREG32(R600_ROM_CNTL, (rom_cntl | R600_SCK_OVERWRITE));

	r = radeon_read_bios(rdev);

	/* restore regs */

	if (rdev->family == CHIP_RV730) {

		WREG32(R600_CG_SPLL_FUNC_CNTL, cg_spll_func_cntl);

		/* wait for SPLL_CHG_STATUS to change to 1 */

		cg_spll_status = 0;

		while (!(cg_spll_status & R600_SPLL_CHG_STATUS))

			cg_spll_status = RREG32(R600_CG_SPLL_STATUS);

	}

	WREG32(RADEON_VIPH_CONTROL, viph_control);

	WREG32(R600_BUS_CNTL, bus_cntl);

	WREG32(AVIVO_D1VGA_CONTROL, d1vga_control);

	WREG32(AVIVO_D2VGA_CONTROL, d2vga_control);

	WREG32(AVIVO_VGA_RENDER_CONTROL, vga_render_control);

	WREG32(R600_ROM_CNTL, rom_cntl);

	return r;

}

static bool r600_read_disabled_bios(struct radeon_device *rdev)

{

	uint32_t viph_control;

	uint32_t bus_cntl;

	uint32_t d1vga_control;

	uint32_t d2vga_control;

	uint32_t vga_render_control;

	uint32_t rom_cntl;

	uint32_t general_pwrmgt;

	uint32_t low_vid_lower_gpio_cntl;

	uint32_t medium_vid_lower_gpio_cntl;

	uint32_t high_vid_lower_gpio_cntl;

	uint32_t ctxsw_vid_lower_gpio_cntl;

	uint32_t lower_gpio_enable;

	bool r;

	viph_control = RREG32(RADEON_VIPH_CONTROL);

	bus_cntl = RREG32(R600_BUS_CNTL);

	d1vga_control = RREG32(AVIVO_D1VGA_CONTROL);

	d2vga_control = RREG32(AVIVO_D2VGA_CONTROL);

	vga_render_control = RREG32(AVIVO_VGA_RENDER_CONTROL);

	rom_cntl = RREG32(R600_ROM_CNTL);

	general_pwrmgt = RREG32(R600_GENERAL_PWRMGT);

	low_vid_lower_gpio_cntl = RREG32(R600_LOW_VID_LOWER_GPIO_CNTL);

	medium_vid_lower_gpio_cntl = RREG32(R600_MEDIUM_VID_LOWER_GPIO_CNTL);

	high_vid_lower_gpio_cntl = RREG32(R600_HIGH_VID_LOWER_GPIO_CNTL);

	ctxsw_vid_lower_gpio_cntl = RREG32(R600_CTXSW_VID_LOWER_GPIO_CNTL);

	lower_gpio_enable = RREG32(R600_LOWER_GPIO_ENABLE);

	/* disable VIP */

	WREG32(RADEON_VIPH_CONTROL, (viph_control & ~RADEON_VIPH_EN));

	/* enable the rom */

	WREG32(R600_BUS_CNTL, (bus_cntl & ~R600_BIOS_ROM_DIS));

	/* Disable VGA mode */

	WREG32(AVIVO_D1VGA_CONTROL,

	       (d1vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |

		AVIVO_DVGA_CONTROL_TIMING_SELECT)));

	WREG32(AVIVO_D2VGA_CONTROL,

	       (d2vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |

		AVIVO_DVGA_CONTROL_TIMING_SELECT)));

	WREG32(AVIVO_VGA_RENDER_CONTROL,

	       (vga_render_control & ~AVIVO_VGA_VSTATUS_CNTL_MASK));

	WREG32(R600_ROM_CNTL,

	       ((rom_cntl & ~R600_SCK_PRESCALE_CRYSTAL_CLK_MASK) |

		(1 << R600_SCK_PRESCALE_CRYSTAL_CLK_SHIFT) |

		R600_SCK_OVERWRITE));

	WREG32(R600_GENERAL_PWRMGT, (general_pwrmgt & ~R600_OPEN_DRAIN_PADS));

	WREG32(R600_LOW_VID_LOWER_GPIO_CNTL,

	       (low_vid_lower_gpio_cntl & ~0x400));

	WREG32(R600_MEDIUM_VID_LOWER_GPIO_CNTL,

	       (medium_vid_lower_gpio_cntl & ~0x400));

	WREG32(R600_HIGH_VID_LOWER_GPIO_CNTL,

	       (high_vid_lower_gpio_cntl & ~0x400));

	WREG32(R600_CTXSW_VID_LOWER_GPIO_CNTL,

	       (ctxsw_vid_lower_gpio_cntl & ~0x400));

	WREG32(R600_LOWER_GPIO_ENABLE, (lower_gpio_enable | 0x400));

	r = radeon_read_bios(rdev);

	/* restore regs */

	WREG32(RADEON_VIPH_CONTROL, viph_control);

	WREG32(R600_BUS_CNTL, bus_cntl);

	WREG32(AVIVO_D1VGA_CONTROL, d1vga_control);

	WREG32(AVIVO_D2VGA_CONTROL, d2vga_control);

	WREG32(AVIVO_VGA_RENDER_CONTROL, vga_render_control);

	WREG32(R600_ROM_CNTL, rom_cntl);

	WREG32(R600_GENERAL_PWRMGT, general_pwrmgt);

	WREG32(R600_LOW_VID_LOWER_GPIO_CNTL, low_vid_lower_gpio_cntl);

	WREG32(R600_MEDIUM_VID_LOWER_GPIO_CNTL, medium_vid_lower_gpio_cntl);

	WREG32(R600_HIGH_VID_LOWER_GPIO_CNTL, high_vid_lower_gpio_cntl);

	WREG32(R600_CTXSW_VID_LOWER_GPIO_CNTL, ctxsw_vid_lower_gpio_cntl);

	WREG32(R600_LOWER_GPIO_ENABLE, lower_gpio_enable);

	return r;

}

static bool avivo_read_disabled_bios(struct radeon_device *rdev)

{

	uint32_t seprom_cntl1;

	uint32_t viph_control;

	uint32_t bus_cntl;

	uint32_t d1vga_control;

	uint32_t d2vga_control;

	uint32_t vga_render_control;

	uint32_t gpiopad_a;

	uint32_t gpiopad_en;

	uint32_t gpiopad_mask;

	bool r;

	seprom_cntl1 = RREG32(RADEON_SEPROM_CNTL1);

	viph_control = RREG32(RADEON_VIPH_CONTROL);

	bus_cntl = RREG32(RV370_BUS_CNTL);

	d1vga_control = RREG32(AVIVO_D1VGA_CONTROL);

	d2vga_control = RREG32(AVIVO_D2VGA_CONTROL);

	vga_render_control = RREG32(AVIVO_VGA_RENDER_CONTROL);

	gpiopad_a = RREG32(RADEON_GPIOPAD_A);

	gpiopad_en = RREG32(RADEON_GPIOPAD_EN);

	gpiopad_mask = RREG32(RADEON_GPIOPAD_MASK);

	WREG32(RADEON_SEPROM_CNTL1,

	       ((seprom_cntl1 & ~RADEON_SCK_PRESCALE_MASK) |

		(0xc << RADEON_SCK_PRESCALE_SHIFT)));

	WREG32(RADEON_GPIOPAD_A, 0);

	WREG32(RADEON_GPIOPAD_EN, 0);

	WREG32(RADEON_GPIOPAD_MASK, 0);

	/* disable VIP */

	WREG32(RADEON_VIPH_CONTROL, (viph_control & ~RADEON_VIPH_EN));

	/* enable the rom */

	WREG32(RV370_BUS_CNTL, (bus_cntl & ~RV370_BUS_BIOS_DIS_ROM));

	/* Disable VGA mode */

	WREG32(AVIVO_D1VGA_CONTROL,

	       (d1vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |

		AVIVO_DVGA_CONTROL_TIMING_SELECT)));

	WREG32(AVIVO_D2VGA_CONTROL,

	       (d2vga_control & ~(AVIVO_DVGA_CONTROL_MODE_ENABLE |

		AVIVO_DVGA_CONTROL_TIMING_SELECT)));

	WREG32(AVIVO_VGA_RENDER_CONTROL,

	       (vga_render_control & ~AVIVO_VGA_VSTATUS_CNTL_MASK));

	r = radeon_read_bios(rdev);

	/* restore regs */

	WREG32(RADEON_SEPROM_CNTL1, seprom_cntl1);

	WREG32(RADEON_VIPH_CONTROL, viph_control);

	WREG32(RV370_BUS_CNTL, bus_cntl);

	WREG32(AVIVO_D1VGA_CONTROL, d1vga_control);

	WREG32(AVIVO_D2VGA_CONTROL, d2vga_control);

	WREG32(AVIVO_VGA_RENDER_CONTROL, vga_render_control);

	WREG32(RADEON_GPIOPAD_A, gpiopad_a);

	WREG32(RADEON_GPIOPAD_EN, gpiopad_en);

	WREG32(RADEON_GPIOPAD_MASK, gpiopad_mask);

	return r;

}

static bool legacy_read_disabled_bios(struct radeon_device *rdev)

{

	uint32_t seprom_cntl1;

	uint32_t viph_control;

	uint32_t bus_cntl;

	uint32_t crtc_gen_cntl;

	uint32_t crtc2_gen_cntl;

	uint32_t crtc_ext_cntl;

	uint32_t fp2_gen_cntl;

	bool r;

	seprom_cntl1 = RREG32(RADEON_SEPROM_CNTL1);

	viph_control = RREG32(RADEON_VIPH_CONTROL);

	if (rdev->flags & RADEON_IS_PCIE)

		bus_cntl = RREG32(RV370_BUS_CNTL);

	else

		bus_cntl = RREG32(RADEON_BUS_CNTL);

	crtc_gen_cntl = RREG32(RADEON_CRTC_GEN_CNTL);

	crtc2_gen_cntl = 0;

	crtc_ext_cntl = RREG32(RADEON_CRTC_EXT_CNTL);

	fp2_gen_cntl = 0;

	if (rdev->ddev->pdev->device == PCI_DEVICE_ID_ATI_RADEON_QY) {

		fp2_gen_cntl = RREG32(RADEON_FP2_GEN_CNTL);

	}

	if (!(rdev->flags & RADEON_SINGLE_CRTC)) {

		crtc2_gen_cntl = RREG32(RADEON_CRTC2_GEN_CNTL);

	}

	WREG32(RADEON_SEPROM_CNTL1,

	       ((seprom_cntl1 & ~RADEON_SCK_PRESCALE_MASK) |

		(0xc << RADEON_SCK_PRESCALE_SHIFT)));

	/* disable VIP */

	WREG32(RADEON_VIPH_CONTROL, (viph_control & ~RADEON_VIPH_EN));

	/* enable the rom */

	if (rdev->flags & RADEON_IS_PCIE)

		WREG32(RV370_BUS_CNTL, (bus_cntl & ~RV370_BUS_BIOS_DIS_ROM));

	else

		WREG32(RADEON_BUS_CNTL, (bus_cntl & ~RADEON_BUS_BIOS_DIS_ROM));

	/* Turn off mem requests and CRTC for both controllers */

	WREG32(RADEON_CRTC_GEN_CNTL,

	       ((crtc_gen_cntl & ~RADEON_CRTC_EN) |

		(RADEON_CRTC_DISP_REQ_EN_B |

		 RADEON_CRTC_EXT_DISP_EN)));

	if (!(rdev->flags & RADEON_SINGLE_CRTC)) {

		WREG32(RADEON_CRTC2_GEN_CNTL,

		       ((crtc2_gen_cntl & ~RADEON_CRTC2_EN) |

			RADEON_CRTC2_DISP_REQ_EN_B));

	}

	/* Turn off CRTC */

	WREG32(RADEON_CRTC_EXT_CNTL,

	       ((crtc_ext_cntl & ~RADEON_CRTC_CRT_ON) |

		(RADEON_CRTC_SYNC_TRISTAT |

		 RADEON_CRTC_DISPLAY_DIS)));

	if (rdev->ddev->pdev->device == PCI_DEVICE_ID_ATI_RADEON_QY) {

		WREG32(RADEON_FP2_GEN_CNTL, (fp2_gen_cntl & ~RADEON_FP2_ON));

	}

	r = radeon_read_bios(rdev);

	/* restore regs */

	WREG32(RADEON_SEPROM_CNTL1, seprom_cntl1);

	WREG32(RADEON_VIPH_CONTROL, viph_control);

	if (rdev->flags & RADEON_IS_PCIE)

		WREG32(RV370_BUS_CNTL, bus_cntl);

	else

		WREG32(RADEON_BUS_CNTL, bus_cntl);

	WREG32(RADEON_CRTC_GEN_CNTL, crtc_gen_cntl);

	if (!(rdev->flags & RADEON_SINGLE_CRTC)) {

		WREG32(RADEON_CRTC2_GEN_CNTL, crtc2_gen_cntl);

	}

	WREG32(RADEON_CRTC_EXT_CNTL, crtc_ext_cntl);

	if (rdev->ddev->pdev->device == PCI_DEVICE_ID_ATI_RADEON_QY) {

		WREG32(RADEON_FP2_GEN_CNTL, fp2_gen_cntl);

	}

	return r;

}

static bool radeon_read_disabled_bios(struct radeon_device *rdev)

{

	if (rdev->flags & RADEON_IS_IGP)

		return igp_read_bios_from_vram(rdev);

	else if (rdev->family >= CHIP_BARTS)

		return ni_read_disabled_bios(rdev);

	else if (rdev->family >= CHIP_RV770)

		return r700_read_disabled_bios(rdev);

	else if (rdev->family >= CHIP_R600)

		return r600_read_disabled_bios(rdev);

	else if (rdev->family >= CHIP_RS600)

		return avivo_read_disabled_bios(rdev);

	else

		return legacy_read_disabled_bios(rdev);

}

#ifdef CONFIG_ACPI

static bool radeon_acpi_vfct_bios(struct radeon_device *rdev)

{

	bool ret = false;

	struct acpi_table_header *hdr;

	acpi_size tbl_size;

	UEFI_ACPI_VFCT *vfct;

	GOP_VBIOS_CONTENT *vbios;

	VFCT_IMAGE_HEADER *vhdr;

	if (!ACPI_SUCCESS(acpi_get_table_with_size("VFCT", 1, &hdr, &tbl_size)))

		return false;

	if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {

		DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");

		goto out_unmap;

	}

	vfct = (UEFI_ACPI_VFCT *)hdr;

	if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) > tbl_size) {

		DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");

		goto out_unmap;

	}

	vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + vfct->VBIOSImageOffset);

	vhdr = &vbios->VbiosHeader;

	DRM_INFO("ACPI VFCT contains a BIOS for %02x:%02x.%d %04x:%04x, size %d\n",

			vhdr->PCIBus, vhdr->PCIDevice, vhdr->PCIFunction,

			vhdr->VendorID, vhdr->DeviceID, vhdr->ImageLength);

	if (vhdr->PCIBus != rdev->pdev->bus->number ||

	    vhdr->PCIDevice != PCI_SLOT(rdev->pdev->devfn) ||

	    vhdr->PCIFunction != PCI_FUNC(rdev->pdev->devfn) ||

	    vhdr->VendorID != rdev->pdev->vendor ||

	    vhdr->DeviceID != rdev->pdev->device) {

		DRM_INFO("ACPI VFCT table is not for this card\n");

		goto out_unmap;

	}

	if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) + vhdr->ImageLength > tbl_size) {

		DRM_ERROR("ACPI VFCT image truncated\n");

		goto out_unmap;

	}

	rdev->bios = kmemdup(&vbios->VbiosContent, vhdr->ImageLength, GFP_KERNEL);

	ret = !!rdev->bios;

out_unmap:

	return ret;

}

#else

static inline bool radeon_acpi_vfct_bios(struct radeon_device *rdev)

{

	return false;

}

#endif

bool radeon_get_bios(struct radeon_device *rdev)

{

	bool r;

	uint16_t tmp;

	r = radeon_atrm_get_bios(rdev);

	if (r == false)

		r = radeon_acpi_vfct_bios(rdev);

	if (r == false)

		r = igp_read_bios_from_vram(rdev);

    if (r == false)

        r = radeon_read_bios(rdev);

	if (r == false) {

		r = radeon_read_disabled_bios(rdev);

	}

	if (r == false || rdev->bios == NULL) {

		DRM_ERROR("Unable to locate a BIOS ROM\n");

		rdev->bios = NULL;

		return false;

	}

	if (rdev->bios[0] != 0x55 || rdev->bios[1] != 0xaa) {

		printk("BIOS signature incorrect %x %x\n", rdev->bios[0], rdev->bios[1]);

		goto free_bios;

	}

	tmp = RBIOS16(0x18);

	if (RBIOS8(tmp + 0x14) != 0x0) {

		DRM_INFO("Not an x86 BIOS ROM, not using.\n");

		goto free_bios;

	}

	rdev->bios_header_start = RBIOS16(0x48);

	if (!rdev->bios_header_start) {

		goto free_bios;

	}

	tmp = rdev->bios_header_start + 4;

	if (!memcmp(rdev->bios + tmp, "ATOM", 4) ||

	    !memcmp(rdev->bios + tmp, "MOTA", 4)) {

		rdev->is_atom_bios = true;

	} else {

		rdev->is_atom_bios = false;

	}

	DRM_DEBUG("%sBIOS detected\n", rdev->is_atom_bios ? "ATOM" : "COM");

	return true;

free_bios:

	kfree(rdev->bios);

	rdev->bios = NULL;

	return false;

}