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ubuntu-linux-kernel/drivers/gpu/drm/radeon/radeon_bios.c

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2024-04-01 15:06:58 +00:00
/*
* 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 <drm/drmP.h>
#include "radeon_reg.h"
#include "radeon.h"
#include "atom.h"
#include <linux/slab.h>
#include <linux/acpi.h>
/*
* 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_fromio(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;
}
val1 = readb(&bios[0]);
val2 = readb(&bios[1]);
if (size == 0 || val1 != 0x55 || val2 != 0xaa) {
pci_unmap_rom(rdev->pdev, bios);
return false;
}
rdev->bios = kzalloc(size, GFP_KERNEL);
if (rdev->bios == NULL) {
pci_unmap_rom(rdev->pdev, bios);
return false;
}
memcpy_fromio(rdev->bios, bios, size);
pci_unmap_rom(rdev->pdev, bios);
return true;
}
static bool radeon_read_platform_bios(struct radeon_device *rdev)
{
uint8_t __iomem *bios;
size_t size;
rdev->bios = NULL;
bios = pci_platform_rom(rdev->pdev, &size);
if (!bios) {
return false;
}
if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) {
return false;
}
rdev->bios = kmemdup(bios, size, GFP_KERNEL);
if (rdev->bios == NULL) {
return false;
}
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) {
while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 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)
{
struct acpi_table_header *hdr;
acpi_size tbl_size;
UEFI_ACPI_VFCT *vfct;
unsigned offset;
if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))
return false;
tbl_size = hdr->length;
if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
return false;
}
vfct = (UEFI_ACPI_VFCT *)hdr;
offset = vfct->VBIOSImageOffset;
while (offset < tbl_size) {
GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset);
VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader;
offset += sizeof(VFCT_IMAGE_HEADER);
if (offset > tbl_size) {
DRM_ERROR("ACPI VFCT image header truncated\n");
return false;
}
offset += vhdr->ImageLength;
if (offset > tbl_size) {
DRM_ERROR("ACPI VFCT image truncated\n");
return false;
}
if (vhdr->ImageLength &&
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) {
rdev->bios = kmemdup(&vbios->VbiosContent,
vhdr->ImageLength,
GFP_KERNEL);
if (!rdev->bios)
return false;
return true;
}
}
DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
return false;
}
#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)
r = radeon_read_platform_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;
}