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u-boot/drivers/video/ivybridge_igd.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

788 lines
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C
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2016 Google, Inc
*/
#include <common.h>
#include <bios_emul.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <pci_rom.h>
#include <vbe.h>
#include <asm/intel_regs.h>
#include <asm/io.h>
#include <asm/mtrr.h>
#include <asm/pci.h>
#include <asm/arch/pch.h>
#include <asm/arch/sandybridge.h>
DECLARE_GLOBAL_DATA_PTR;
struct gt_powermeter {
u16 reg;
u32 value;
};
/* These are magic values - unfortunately the meaning is unknown */
static const struct gt_powermeter snb_pm_gt1[] = {
{ 0xa200, 0xcc000000 },
{ 0xa204, 0x07000040 },
{ 0xa208, 0x0000fe00 },
{ 0xa20c, 0x00000000 },
{ 0xa210, 0x17000000 },
{ 0xa214, 0x00000021 },
{ 0xa218, 0x0817fe19 },
{ 0xa21c, 0x00000000 },
{ 0xa220, 0x00000000 },
{ 0xa224, 0xcc000000 },
{ 0xa228, 0x07000040 },
{ 0xa22c, 0x0000fe00 },
{ 0xa230, 0x00000000 },
{ 0xa234, 0x17000000 },
{ 0xa238, 0x00000021 },
{ 0xa23c, 0x0817fe19 },
{ 0xa240, 0x00000000 },
{ 0xa244, 0x00000000 },
{ 0xa248, 0x8000421e },
{ 0 }
};
static const struct gt_powermeter snb_pm_gt2[] = {
{ 0xa200, 0x330000a6 },
{ 0xa204, 0x402d0031 },
{ 0xa208, 0x00165f83 },
{ 0xa20c, 0xf1000000 },
{ 0xa210, 0x00000000 },
{ 0xa214, 0x00160016 },
{ 0xa218, 0x002a002b },
{ 0xa21c, 0x00000000 },
{ 0xa220, 0x00000000 },
{ 0xa224, 0x330000a6 },
{ 0xa228, 0x402d0031 },
{ 0xa22c, 0x00165f83 },
{ 0xa230, 0xf1000000 },
{ 0xa234, 0x00000000 },
{ 0xa238, 0x00160016 },
{ 0xa23c, 0x002a002b },
{ 0xa240, 0x00000000 },
{ 0xa244, 0x00000000 },
{ 0xa248, 0x8000421e },
{ 0 }
};
static const struct gt_powermeter ivb_pm_gt1[] = {
{ 0xa800, 0x00000000 },
{ 0xa804, 0x00021c00 },
{ 0xa808, 0x00000403 },
{ 0xa80c, 0x02001700 },
{ 0xa810, 0x05000200 },
{ 0xa814, 0x00000000 },
{ 0xa818, 0x00690500 },
{ 0xa81c, 0x0000007f },
{ 0xa820, 0x01002501 },
{ 0xa824, 0x00000300 },
{ 0xa828, 0x01000331 },
{ 0xa82c, 0x0000000c },
{ 0xa830, 0x00010016 },
{ 0xa834, 0x01100101 },
{ 0xa838, 0x00010103 },
{ 0xa83c, 0x00041300 },
{ 0xa840, 0x00000b30 },
{ 0xa844, 0x00000000 },
{ 0xa848, 0x7f000000 },
{ 0xa84c, 0x05000008 },
{ 0xa850, 0x00000001 },
{ 0xa854, 0x00000004 },
{ 0xa858, 0x00000007 },
{ 0xa85c, 0x00000000 },
{ 0xa860, 0x00010000 },
{ 0xa248, 0x0000221e },
{ 0xa900, 0x00000000 },
{ 0xa904, 0x00001c00 },
{ 0xa908, 0x00000000 },
{ 0xa90c, 0x06000000 },
{ 0xa910, 0x09000200 },
{ 0xa914, 0x00000000 },
{ 0xa918, 0x00590000 },
{ 0xa91c, 0x00000000 },
{ 0xa920, 0x04002501 },
{ 0xa924, 0x00000100 },
{ 0xa928, 0x03000410 },
{ 0xa92c, 0x00000000 },
{ 0xa930, 0x00020000 },
{ 0xa934, 0x02070106 },
{ 0xa938, 0x00010100 },
{ 0xa93c, 0x00401c00 },
{ 0xa940, 0x00000000 },
{ 0xa944, 0x00000000 },
{ 0xa948, 0x10000e00 },
{ 0xa94c, 0x02000004 },
{ 0xa950, 0x00000001 },
{ 0xa954, 0x00000004 },
{ 0xa960, 0x00060000 },
{ 0xaa3c, 0x00001c00 },
{ 0xaa54, 0x00000004 },
{ 0xaa60, 0x00060000 },
{ 0 }
};
static const struct gt_powermeter ivb_pm_gt2_17w[] = {
{ 0xa800, 0x20000000 },
{ 0xa804, 0x000e3800 },
{ 0xa808, 0x00000806 },
{ 0xa80c, 0x0c002f00 },
{ 0xa810, 0x0c000800 },
{ 0xa814, 0x00000000 },
{ 0xa818, 0x00d20d00 },
{ 0xa81c, 0x000000ff },
{ 0xa820, 0x03004b02 },
{ 0xa824, 0x00000600 },
{ 0xa828, 0x07000773 },
{ 0xa82c, 0x00000000 },
{ 0xa830, 0x00020032 },
{ 0xa834, 0x1520040d },
{ 0xa838, 0x00020105 },
{ 0xa83c, 0x00083700 },
{ 0xa840, 0x000016ff },
{ 0xa844, 0x00000000 },
{ 0xa848, 0xff000000 },
{ 0xa84c, 0x0a000010 },
{ 0xa850, 0x00000002 },
{ 0xa854, 0x00000008 },
{ 0xa858, 0x0000000f },
{ 0xa85c, 0x00000000 },
{ 0xa860, 0x00020000 },
{ 0xa248, 0x0000221e },
{ 0xa900, 0x00000000 },
{ 0xa904, 0x00003800 },
{ 0xa908, 0x00000000 },
{ 0xa90c, 0x0c000000 },
{ 0xa910, 0x12000800 },
{ 0xa914, 0x00000000 },
{ 0xa918, 0x00b20000 },
{ 0xa91c, 0x00000000 },
{ 0xa920, 0x08004b02 },
{ 0xa924, 0x00000300 },
{ 0xa928, 0x01000820 },
{ 0xa92c, 0x00000000 },
{ 0xa930, 0x00030000 },
{ 0xa934, 0x15150406 },
{ 0xa938, 0x00020300 },
{ 0xa93c, 0x00903900 },
{ 0xa940, 0x00000000 },
{ 0xa944, 0x00000000 },
{ 0xa948, 0x20001b00 },
{ 0xa94c, 0x0a000010 },
{ 0xa950, 0x00000000 },
{ 0xa954, 0x00000008 },
{ 0xa960, 0x00110000 },
{ 0xaa3c, 0x00003900 },
{ 0xaa54, 0x00000008 },
{ 0xaa60, 0x00110000 },
{ 0 }
};
static const struct gt_powermeter ivb_pm_gt2_35w[] = {
{ 0xa800, 0x00000000 },
{ 0xa804, 0x00030400 },
{ 0xa808, 0x00000806 },
{ 0xa80c, 0x0c002f00 },
{ 0xa810, 0x0c000300 },
{ 0xa814, 0x00000000 },
{ 0xa818, 0x00d20d00 },
{ 0xa81c, 0x000000ff },
{ 0xa820, 0x03004b02 },
{ 0xa824, 0x00000600 },
{ 0xa828, 0x07000773 },
{ 0xa82c, 0x00000000 },
{ 0xa830, 0x00020032 },
{ 0xa834, 0x1520040d },
{ 0xa838, 0x00020105 },
{ 0xa83c, 0x00083700 },
{ 0xa840, 0x000016ff },
{ 0xa844, 0x00000000 },
{ 0xa848, 0xff000000 },
{ 0xa84c, 0x0a000010 },
{ 0xa850, 0x00000001 },
{ 0xa854, 0x00000008 },
{ 0xa858, 0x00000008 },
{ 0xa85c, 0x00000000 },
{ 0xa860, 0x00020000 },
{ 0xa248, 0x0000221e },
{ 0xa900, 0x00000000 },
{ 0xa904, 0x00003800 },
{ 0xa908, 0x00000000 },
{ 0xa90c, 0x0c000000 },
{ 0xa910, 0x12000800 },
{ 0xa914, 0x00000000 },
{ 0xa918, 0x00b20000 },
{ 0xa91c, 0x00000000 },
{ 0xa920, 0x08004b02 },
{ 0xa924, 0x00000300 },
{ 0xa928, 0x01000820 },
{ 0xa92c, 0x00000000 },
{ 0xa930, 0x00030000 },
{ 0xa934, 0x15150406 },
{ 0xa938, 0x00020300 },
{ 0xa93c, 0x00903900 },
{ 0xa940, 0x00000000 },
{ 0xa944, 0x00000000 },
{ 0xa948, 0x20001b00 },
{ 0xa94c, 0x0a000010 },
{ 0xa950, 0x00000000 },
{ 0xa954, 0x00000008 },
{ 0xa960, 0x00110000 },
{ 0xaa3c, 0x00003900 },
{ 0xaa54, 0x00000008 },
{ 0xaa60, 0x00110000 },
{ 0 }
};
static inline u32 gtt_read(void *bar, u32 reg)
{
return readl(bar + reg);
}
static inline void gtt_write(void *bar, u32 reg, u32 data)
{
writel(data, bar + reg);
}
static void gtt_write_powermeter(void *bar, const struct gt_powermeter *pm)
{
for (; pm && pm->reg; pm++)
gtt_write(bar, pm->reg, pm->value);
}
#define GTT_RETRY 1000
static int gtt_poll(void *bar, u32 reg, u32 mask, u32 value)
{
unsigned try = GTT_RETRY;
u32 data;
while (try--) {
data = gtt_read(bar, reg);
if ((data & mask) == value)
return 1;
udelay(10);
}
printf("GT init timeout\n");
return 0;
}
static int gma_pm_init_pre_vbios(void *gtt_bar, int rev)
{
u32 reg32;
debug("GT Power Management Init, silicon = %#x\n", rev);
if (rev < IVB_STEP_C0) {
/* 1: Enable force wake */
gtt_write(gtt_bar, 0xa18c, 0x00000001);
gtt_poll(gtt_bar, 0x130090, (1 << 0), (1 << 0));
} else {
gtt_write(gtt_bar, 0xa180, 1 << 5);
gtt_write(gtt_bar, 0xa188, 0xffff0001);
gtt_poll(gtt_bar, 0x130040, (1 << 0), (1 << 0));
}
if ((rev & BASE_REV_MASK) == BASE_REV_SNB) {
/* 1d: Set GTT+0x42004 [15:14]=11 (SnB C1+) */
reg32 = gtt_read(gtt_bar, 0x42004);
reg32 |= (1 << 14) | (1 << 15);
gtt_write(gtt_bar, 0x42004, reg32);
}
if (rev >= IVB_STEP_A0) {
/* Display Reset Acknowledge Settings */
reg32 = gtt_read(gtt_bar, 0x45010);
reg32 |= (1 << 1) | (1 << 0);
gtt_write(gtt_bar, 0x45010, reg32);
}
/* 2: Get GT SKU from GTT+0x911c[13] */
reg32 = gtt_read(gtt_bar, 0x911c);
if ((rev & BASE_REV_MASK) == BASE_REV_SNB) {
if (reg32 & (1 << 13)) {
debug("SNB GT1 Power Meter Weights\n");
gtt_write_powermeter(gtt_bar, snb_pm_gt1);
} else {
debug("SNB GT2 Power Meter Weights\n");
gtt_write_powermeter(gtt_bar, snb_pm_gt2);
}
} else {
u32 unit = readl(MCHBAR_REG(0x5938)) & 0xf;
if (reg32 & (1 << 13)) {
/* GT1 SKU */
debug("IVB GT1 Power Meter Weights\n");
gtt_write_powermeter(gtt_bar, ivb_pm_gt1);
} else {
/* GT2 SKU */
u32 tdp = readl(MCHBAR_REG(0x5930)) & 0x7fff;
tdp /= (1 << unit);
if (tdp <= 17) {
/* <=17W ULV */
debug("IVB GT2 17W Power Meter Weights\n");
gtt_write_powermeter(gtt_bar, ivb_pm_gt2_17w);
} else if ((tdp >= 25) && (tdp <= 35)) {
/* 25W-35W */
debug("IVB GT2 25W-35W Power Meter Weights\n");
gtt_write_powermeter(gtt_bar, ivb_pm_gt2_35w);
} else {
/* All others */
debug("IVB GT2 35W Power Meter Weights\n");
gtt_write_powermeter(gtt_bar, ivb_pm_gt2_35w);
}
}
}
/* 3: Gear ratio map */
gtt_write(gtt_bar, 0xa004, 0x00000010);
/* 4: GFXPAUSE */
gtt_write(gtt_bar, 0xa000, 0x00070020);
/* 5: Dynamic EU trip control */
gtt_write(gtt_bar, 0xa080, 0x00000004);
/* 6: ECO bits */
reg32 = gtt_read(gtt_bar, 0xa180);
reg32 |= (1 << 26) | (1 << 31);
/* (bit 20=1 for SNB step D1+ / IVB A0+) */
if (rev >= SNB_STEP_D1)
reg32 |= (1 << 20);
gtt_write(gtt_bar, 0xa180, reg32);
/* 6a: for SnB step D2+ only */
if (((rev & BASE_REV_MASK) == BASE_REV_SNB) &&
(rev >= SNB_STEP_D2)) {
reg32 = gtt_read(gtt_bar, 0x9400);
reg32 |= (1 << 7);
gtt_write(gtt_bar, 0x9400, reg32);
reg32 = gtt_read(gtt_bar, 0x941c);
reg32 &= 0xf;
reg32 |= (1 << 1);
gtt_write(gtt_bar, 0x941c, reg32);
gtt_poll(gtt_bar, 0x941c, (1 << 1), (0 << 1));
}
if ((rev & BASE_REV_MASK) == BASE_REV_IVB) {
reg32 = gtt_read(gtt_bar, 0x907c);
reg32 |= (1 << 16);
gtt_write(gtt_bar, 0x907c, reg32);
/* 6b: Clocking reset controls */
gtt_write(gtt_bar, 0x9424, 0x00000001);
} else {
/* 6b: Clocking reset controls */
gtt_write(gtt_bar, 0x9424, 0x00000000);
}
/* 7 */
if (gtt_poll(gtt_bar, 0x138124, (1 << 31), (0 << 31))) {
gtt_write(gtt_bar, 0x138128, 0x00000029); /* Mailbox Data */
/* Mailbox Cmd for RC6 VID */
gtt_write(gtt_bar, 0x138124, 0x80000004);
if (gtt_poll(gtt_bar, 0x138124, (1 << 31), (0 << 31)))
gtt_write(gtt_bar, 0x138124, 0x8000000a);
gtt_poll(gtt_bar, 0x138124, (1 << 31), (0 << 31));
}
/* 8 */
gtt_write(gtt_bar, 0xa090, 0x00000000); /* RC Control */
gtt_write(gtt_bar, 0xa098, 0x03e80000); /* RC1e Wake Rate Limit */
gtt_write(gtt_bar, 0xa09c, 0x0028001e); /* RC6/6p Wake Rate Limit */
gtt_write(gtt_bar, 0xa0a0, 0x0000001e); /* RC6pp Wake Rate Limit */
gtt_write(gtt_bar, 0xa0a8, 0x0001e848); /* RC Evaluation Interval */
gtt_write(gtt_bar, 0xa0ac, 0x00000019); /* RC Idle Hysteresis */
/* 9 */
gtt_write(gtt_bar, 0x2054, 0x0000000a); /* Render Idle Max Count */
gtt_write(gtt_bar, 0x12054, 0x0000000a); /* Video Idle Max Count */
gtt_write(gtt_bar, 0x22054, 0x0000000a); /* Blitter Idle Max Count */
/* 10 */
gtt_write(gtt_bar, 0xa0b0, 0x00000000); /* Unblock Ack to Busy */
gtt_write(gtt_bar, 0xa0b4, 0x000003e8); /* RC1e Threshold */
gtt_write(gtt_bar, 0xa0b8, 0x0000c350); /* RC6 Threshold */
gtt_write(gtt_bar, 0xa0bc, 0x000186a0); /* RC6p Threshold */
gtt_write(gtt_bar, 0xa0c0, 0x0000fa00); /* RC6pp Threshold */
/* 11 */
gtt_write(gtt_bar, 0xa010, 0x000f4240); /* RP Down Timeout */
gtt_write(gtt_bar, 0xa014, 0x12060000); /* RP Interrupt Limits */
gtt_write(gtt_bar, 0xa02c, 0x00015f90); /* RP Up Threshold */
gtt_write(gtt_bar, 0xa030, 0x000186a0); /* RP Down Threshold */
gtt_write(gtt_bar, 0xa068, 0x000186a0); /* RP Up EI */
gtt_write(gtt_bar, 0xa06c, 0x000493e0); /* RP Down EI */
gtt_write(gtt_bar, 0xa070, 0x0000000a); /* RP Idle Hysteresis */
/* 11a: Enable Render Standby (RC6) */
if ((rev & BASE_REV_MASK) == BASE_REV_IVB) {
/*
* IvyBridge should also support DeepRenderStandby.
*
* Unfortunately it does not work reliably on all SKUs so
* disable it here and it can be enabled by the kernel.
*/
gtt_write(gtt_bar, 0xa090, 0x88040000); /* HW RC Control */
} else {
gtt_write(gtt_bar, 0xa090, 0x88040000); /* HW RC Control */
}
/* 12: Normal Frequency Request */
/* RPNFREQ_VAL comes from MCHBAR 0x5998 23:16 (8 bits!? use 7) */
reg32 = readl(MCHBAR_REG(0x5998));
reg32 >>= 16;
reg32 &= 0xef;
reg32 <<= 25;
gtt_write(gtt_bar, 0xa008, reg32);
/* 13: RP Control */
gtt_write(gtt_bar, 0xa024, 0x00000592);
/* 14: Enable PM Interrupts */
gtt_write(gtt_bar, 0x4402c, 0x03000076);
/* Clear 0x6c024 [8:6] */
reg32 = gtt_read(gtt_bar, 0x6c024);
reg32 &= ~0x000001c0;
gtt_write(gtt_bar, 0x6c024, reg32);
return 0;
}
static int gma_pm_init_post_vbios(struct udevice *dev, int rev, void *gtt_bar)
{
const void *blob = gd->fdt_blob;
int node = dev_of_offset(dev);
u32 reg32, cycle_delay;
debug("GT Power Management Init (post VBIOS)\n");
/* 15: Deassert Force Wake */
if (rev < IVB_STEP_C0) {
gtt_write(gtt_bar, 0xa18c, gtt_read(gtt_bar, 0xa18c) & ~1);
gtt_poll(gtt_bar, 0x130090, (1 << 0), (0 << 0));
} else {
gtt_write(gtt_bar, 0xa188, 0x1fffe);
if (gtt_poll(gtt_bar, 0x130040, (1 << 0), (0 << 0))) {
gtt_write(gtt_bar, 0xa188,
gtt_read(gtt_bar, 0xa188) | 1);
}
}
/* 16: SW RC Control */
gtt_write(gtt_bar, 0xa094, 0x00060000);
/* Setup Digital Port Hotplug */
reg32 = gtt_read(gtt_bar, 0xc4030);
if (!reg32) {
u32 dp_hotplug[3];
if (fdtdec_get_int_array(blob, node, "intel,dp_hotplug",
dp_hotplug, ARRAY_SIZE(dp_hotplug)))
return -EINVAL;
reg32 = (dp_hotplug[0] & 0x7) << 2;
reg32 |= (dp_hotplug[0] & 0x7) << 10;
reg32 |= (dp_hotplug[0] & 0x7) << 18;
gtt_write(gtt_bar, 0xc4030, reg32);
}
/* Setup Panel Power On Delays */
reg32 = gtt_read(gtt_bar, 0xc7208);
if (!reg32) {
reg32 = (unsigned)fdtdec_get_int(blob, node,
"panel-port-select", 0) << 30;
reg32 |= fdtdec_get_int(blob, node, "panel-power-up-delay", 0)
<< 16;
reg32 |= fdtdec_get_int(blob, node,
"panel-power-backlight-on-delay", 0);
gtt_write(gtt_bar, 0xc7208, reg32);
}
/* Setup Panel Power Off Delays */
reg32 = gtt_read(gtt_bar, 0xc720c);
if (!reg32) {
reg32 = fdtdec_get_int(blob, node, "panel-power-down-delay", 0)
<< 16;
reg32 |= fdtdec_get_int(blob, node,
"panel-power-backlight-off-delay", 0);
gtt_write(gtt_bar, 0xc720c, reg32);
}
/* Setup Panel Power Cycle Delay */
cycle_delay = fdtdec_get_int(blob, node,
"intel,panel-power-cycle-delay", 0);
if (cycle_delay) {
reg32 = gtt_read(gtt_bar, 0xc7210);
reg32 &= ~0xff;
reg32 |= cycle_delay;
gtt_write(gtt_bar, 0xc7210, reg32);
}
/* Enable Backlight if needed */
reg32 = fdtdec_get_int(blob, node, "intel,cpu-backlight", 0);
if (reg32) {
gtt_write(gtt_bar, 0x48250, (1 << 31));
gtt_write(gtt_bar, 0x48254, reg32);
}
reg32 = fdtdec_get_int(blob, node, "intel,pch-backlight", 0);
if (reg32) {
gtt_write(gtt_bar, 0xc8250, (1 << 31));
gtt_write(gtt_bar, 0xc8254, reg32);
}
return 0;
}
/*
* Some vga option roms are used for several chipsets but they only have one
* PCI ID in their header. If we encounter such an option rom, we need to do
* the mapping ourselves.
*/
uint32_t board_map_oprom_vendev(uint32_t vendev)
{
switch (vendev) {
case 0x80860102: /* GT1 Desktop */
case 0x8086010a: /* GT1 Server */
case 0x80860112: /* GT2 Desktop */
case 0x80860116: /* GT2 Mobile */
case 0x80860122: /* GT2 Desktop >=1.3GHz */
case 0x80860126: /* GT2 Mobile >=1.3GHz */
case 0x80860156: /* IVB */
case 0x80860166: /* IVB */
return 0x80860106; /* GT1 Mobile */
}
return vendev;
}
static int int15_handler(void)
{
int res = 0;
debug("%s: INT15 function %04x!\n", __func__, M.x86.R_AX);
switch (M.x86.R_AX) {
case 0x5f34:
/*
* Set Panel Fitting Hook:
* bit 2 = Graphics Stretching
* bit 1 = Text Stretching
* bit 0 = Centering (do not set with bit1 or bit2)
* 0 = video bios default
*/
M.x86.R_AX = 0x005f;
M.x86.R_CL = 0x00; /* Use video bios default */
res = 1;
break;
case 0x5f35:
/*
* Boot Display Device Hook:
* bit 0 = CRT
* bit 1 = TV (eDP)
* bit 2 = EFP
* bit 3 = LFP
* bit 4 = CRT2
* bit 5 = TV2 (eDP)
* bit 6 = EFP2
* bit 7 = LFP2
*/
M.x86.R_AX = 0x005f;
M.x86.R_CX = 0x0000; /* Use video bios default */
res = 1;
break;
case 0x5f51:
/*
* Hook to select active LFP configuration:
* 00h = No LVDS, VBIOS does not enable LVDS
* 01h = Int-LVDS, LFP driven by integrated LVDS decoder
* 02h = SVDO-LVDS, LFP driven by SVDO decoder
* 03h = eDP, LFP Driven by Int-DisplayPort encoder
*/
M.x86.R_AX = 0x005f;
M.x86.R_CX = 0x0003; /* eDP */
res = 1;
break;
case 0x5f70:
switch (M.x86.R_CH) {
case 0:
/* Get Mux */
M.x86.R_AX = 0x005f;
M.x86.R_CX = 0x0000;
res = 1;
break;
case 1:
/* Set Mux */
M.x86.R_AX = 0x005f;
M.x86.R_CX = 0x0000;
res = 1;
break;
case 2:
/* Get SG/Non-SG mode */
M.x86.R_AX = 0x005f;
M.x86.R_CX = 0x0000;
res = 1;
break;
default:
/* Interrupt was not handled */
debug("Unknown INT15 5f70 function: 0x%02x\n",
M.x86.R_CH);
break;
}
break;
case 0x5fac:
res = 1;
break;
default:
debug("Unknown INT15 function %04x!\n", M.x86.R_AX);
break;
}
return res;
}
static void sandybridge_setup_graphics(struct udevice *dev,
struct udevice *video_dev)
{
u32 reg32;
u16 reg16;
u8 reg8;
dm_pci_read_config16(video_dev, PCI_DEVICE_ID, &reg16);
switch (reg16) {
case 0x0102: /* GT1 Desktop */
case 0x0106: /* GT1 Mobile */
case 0x010a: /* GT1 Server */
case 0x0112: /* GT2 Desktop */
case 0x0116: /* GT2 Mobile */
case 0x0122: /* GT2 Desktop >=1.3GHz */
case 0x0126: /* GT2 Mobile >=1.3GHz */
case 0x0156: /* IvyBridge */
case 0x0166: /* IvyBridge */
break;
default:
debug("Graphics not supported by this CPU/chipset\n");
return;
}
debug("Initialising Graphics\n");
/* Setup IGD memory by setting GGC[7:3] = 1 for 32MB */
dm_pci_read_config16(dev, GGC, &reg16);
reg16 &= ~0x00f8;
reg16 |= 1 << 3;
/* Program GTT memory by setting GGC[9:8] = 2MB */
reg16 &= ~0x0300;
reg16 |= 2 << 8;
/* Enable VGA decode */
reg16 &= ~0x0002;
dm_pci_write_config16(dev, GGC, reg16);
/* Enable 256MB aperture */
dm_pci_read_config8(video_dev, MSAC, &reg8);
reg8 &= ~0x06;
reg8 |= 0x02;
dm_pci_write_config8(video_dev, MSAC, reg8);
/* Erratum workarounds */
reg32 = readl(MCHBAR_REG(0x5f00));
reg32 |= (1 << 9) | (1 << 10);
writel(reg32, MCHBAR_REG(0x5f00));
/* Enable SA Clock Gating */
reg32 = readl(MCHBAR_REG(0x5f00));
writel(reg32 | 1, MCHBAR_REG(0x5f00));
/* GPU RC6 workaround for sighting 366252 */
reg32 = readl(MCHBAR_REG(0x5d14));
reg32 |= (1 << 31);
writel(reg32, MCHBAR_REG(0x5d14));
/* VLW */
reg32 = readl(MCHBAR_REG(0x6120));
reg32 &= ~(1 << 0);
writel(reg32, MCHBAR_REG(0x6120));
reg32 = readl(MCHBAR_REG(0x5418));
reg32 |= (1 << 4) | (1 << 5);
writel(reg32, MCHBAR_REG(0x5418));
}
static int gma_func0_init(struct udevice *dev)
{
struct udevice *nbridge;
void *gtt_bar;
ulong base;
u32 reg32;
int ret;
int rev;
/* Enable PCH Display Port */
writew(0x0010, RCB_REG(DISPBDF));
setbits_le32(RCB_REG(FD2), PCH_ENABLE_DBDF);
ret = uclass_first_device_err(UCLASS_NORTHBRIDGE, &nbridge);
if (ret)
return ret;
rev = bridge_silicon_revision(nbridge);
sandybridge_setup_graphics(nbridge, dev);
/* IGD needs to be Bus Master */
dm_pci_read_config32(dev, PCI_COMMAND, &reg32);
reg32 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
dm_pci_write_config32(dev, PCI_COMMAND, reg32);
/* Use write-combining for the graphics memory, 256MB */
base = dm_pci_read_bar32(dev, 2);
mtrr_add_request(MTRR_TYPE_WRCOMB, base, 256 << 20);
mtrr_commit(true);
gtt_bar = (void *)(ulong)dm_pci_read_bar32(dev, 0);
debug("GT bar %p\n", gtt_bar);
ret = gma_pm_init_pre_vbios(gtt_bar, rev);
if (ret)
return ret;
return rev;
}
static int bd82x6x_video_probe(struct udevice *dev)
{
void *gtt_bar;
int ret, rev;
rev = gma_func0_init(dev);
if (rev < 0)
return rev;
ret = vbe_setup_video(dev, int15_handler);
if (ret)
return ret;
/* Post VBIOS init */
gtt_bar = (void *)(ulong)dm_pci_read_bar32(dev, 0);
ret = gma_pm_init_post_vbios(dev, rev, gtt_bar);
if (ret)
return ret;
return 0;
}
static const struct udevice_id bd82x6x_video_ids[] = {
{ .compatible = "intel,gma" },
{ }
};
U_BOOT_DRIVER(bd82x6x_video) = {
.name = "bd82x6x_video",
.id = UCLASS_VIDEO,
.of_match = bd82x6x_video_ids,
.probe = bd82x6x_video_probe,
};
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