mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 08:26:29 +00:00
db8cc27b80
* drm-platform: drm: Make sure the DRM offset matches the CPU drm: Add __arm defines to DRM drm: Add support for platform devices to register as DRM devices drm: Remove drm_resource wrappers
477 lines
14 KiB
C
477 lines
14 KiB
C
/*
|
|
* 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 "drmP.h"
|
|
#include "radeon_reg.h"
|
|
#include "radeon.h"
|
|
#include "atom.h"
|
|
|
|
#include <linux/vga_switcheroo.h>
|
|
#include <linux/slab.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;
|
|
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 = kmemdup(bios, size, GFP_KERNEL);
|
|
if (rdev->bios == NULL) {
|
|
pci_unmap_rom(rdev->pdev, bios);
|
|
return false;
|
|
}
|
|
pci_unmap_rom(rdev->pdev, bios);
|
|
return true;
|
|
}
|
|
|
|
/* ATRM is used to get the BIOS on the discrete cards in
|
|
* dual-gpu systems.
|
|
*/
|
|
static bool radeon_atrm_get_bios(struct radeon_device *rdev)
|
|
{
|
|
int ret;
|
|
int size = 64 * 1024;
|
|
int i;
|
|
|
|
if (!radeon_atrm_supported(rdev->pdev))
|
|
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_get_bios_chunk(rdev->bios,
|
|
(i * ATRM_BIOS_PAGE),
|
|
ATRM_BIOS_PAGE);
|
|
if (ret <= 0)
|
|
break;
|
|
}
|
|
|
|
if (i == 0 || rdev->bios[0] != 0x55 || rdev->bios[1] != 0xaa) {
|
|
kfree(rdev->bios);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
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(RADEON_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(RADEON_BUS_CNTL, (bus_cntl & ~RADEON_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));
|
|
|
|
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(RADEON_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(RADEON_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(RADEON_BUS_CNTL, (bus_cntl & ~RADEON_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));
|
|
|
|
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(RADEON_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(RADEON_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(RADEON_BUS_CNTL, (bus_cntl & ~RADEON_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(RADEON_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);
|
|
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->pci_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 */
|
|
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->pci_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);
|
|
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->pci_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_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);
|
|
}
|
|
|
|
|
|
bool radeon_get_bios(struct radeon_device *rdev)
|
|
{
|
|
bool r;
|
|
uint16_t tmp;
|
|
|
|
r = radeon_atrm_get_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;
|
|
}
|