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switch-coreboot/src/northbridge/intel/i945/gma.c
Nico Huber e12e3b7a17 UPSTREAM: Kconfig: Add choice of framebuffer mode 
Rename `FRAMEBUFFER_KEEP_VESA_MODE` to `LINEAR_FRAMEBUFFER` and put
it together with new `VGA_TEXT_FRAMEBUFFER` into a choice. There are
two versions of `LINEAR_FRAMEBUFFER` that differ only in the prompt
and help text (one for `HAVE_VBE_LINEAR_FRAMEBUFFER` and one for
`HAVE_LINEAR_FRAMEBUFFER`). Due to `kconfig_lint` we have to model
that with additional symbols.

BUG=none
BRANCH=none
TEST=none

Change-Id: I095dd4f36d853de51387895bace494840aaca3c1
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Original-Commit-Id: 6d8266b91d
Original-Change-Id: I9144351491a14d9bb5e650c14933b646bc83fab0
Original-Signed-off-by: Nico Huber <nico.h@gmx.de>
Original-Reviewed-on: https://review.coreboot.org/19804
Original-Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/533048
Commit-Ready: Patrick Georgi <pgeorgi@chromium.org>
Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>
2017-06-18 04:25:17 -07:00

818 lines
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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008-2009 coresystems GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <console/console.h>
#include <bootmode.h>
#include <delay.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <pc80/mc146818rtc.h>
#include <edid.h>
#include <drivers/intel/gma/edid.h>
#include <drivers/intel/gma/i915.h>
#include <string.h>
#include <pc80/vga.h>
#include <pc80/vga_io.h>
#include <commonlib/helpers.h>
#include "i945.h"
#include "chip.h"
#define GDRST 0xc0
#define MSAC 0x62 /* Multi Size Aperture Control */
#define LVDS_CLOCK_A_POWERUP_ALL (3 << 8)
#define LVDS_CLOCK_B_POWERUP_ALL (3 << 4)
#define LVDS_CLOCK_BOTH_POWERUP_ALL (3 << 2)
#define DISPPLANE_BGRX888 (0x6<<26)
#define DPLLB_LVDS_P2_CLOCK_DIV_7 (1 << 24) /* i915 */
#define DPLL_INTEGRATED_CRI_CLK_VLV (1<<14)
#define PGETBL_CTL 0x2020
#define PGETBL_ENABLED 0x00000001
#define BASE_FREQUENCY 100000
#define DEFAULT_BLC_PWM 180
static int gtt_setup(u8 *mmiobase)
{
unsigned long PGETBL_save;
unsigned long tom; // top of memory
/*
* The Video BIOS places the GTT right below top of memory.
*/
tom = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), TOLUD) << 24;
PGETBL_save = tom - 256 * KiB;
PGETBL_save |= PGETBL_ENABLED;
PGETBL_save |= 2; /* set GTT to 256kb */
write32(mmiobase + GFX_FLSH_CNTL, 0);
write32(mmiobase + PGETBL_CTL, PGETBL_save);
/* verify */
if (read32(mmiobase + PGETBL_CTL) & PGETBL_ENABLED) {
printk(BIOS_DEBUG, "gtt_setup is enabled.\n");
} else {
printk(BIOS_DEBUG, "gtt_setup failed!!!\n");
return 1;
}
write32(mmiobase + GFX_FLSH_CNTL, 0);
return 0;
}
static int intel_gma_init_lvds(struct northbridge_intel_i945_config *conf,
unsigned int pphysbase, unsigned int piobase,
u8 *mmiobase, unsigned int pgfx)
{
struct edid edid;
struct edid_mode *mode;
u8 edid_data[128];
unsigned long temp;
int hpolarity, vpolarity;
u32 smallest_err = 0xffffffff;
u32 target_frequency;
u32 pixel_p1 = 1;
u32 pixel_p2;
u32 pixel_n = 1;
u32 pixel_m1 = 1;
u32 pixel_m2 = 1;
u32 hactive, vactive, right_border, bottom_border;
u32 vsync, hsync, vblank, hblank, hfront_porch, vfront_porch;
u32 i, j;
u32 uma_size;
u16 reg16;
printk(BIOS_SPEW,
"i915lightup: graphics %p mmio %p addrport %04x physbase %08x\n",
(void *)pgfx, mmiobase, piobase, pphysbase);
intel_gmbus_read_edid(mmiobase + GMBUS0, 3, 0x50, edid_data,
sizeof(edid_data));
decode_edid(edid_data, sizeof(edid_data), &edid);
mode = &edid.mode;
hpolarity = (mode->phsync == '-');
vpolarity = (mode->pvsync == '-');
hactive = edid.x_resolution;
vactive = edid.y_resolution;
right_border = mode->hborder;
bottom_border = mode->vborder;
vblank = mode->vbl;
hblank = mode->hbl;
vsync = mode->vspw;
hsync = mode->hspw;
hfront_porch = mode->hso;
vfront_porch = mode->vso;
for (i = 0; i < 2; i++)
for (j = 0; j < 0x100; j++)
/* R = j, G = j, B = j. */
write32(mmiobase + PALETTE(i) + 4 * j, 0x10101 * j);
write32(mmiobase + PCH_PP_CONTROL, PANEL_UNLOCK_REGS
| (read32(mmiobase + PCH_PP_CONTROL) & ~PANEL_UNLOCK_MASK));
write32(mmiobase + MI_ARB_STATE, MI_ARB_C3_LP_WRITE_ENABLE | (1 << 27));
/* Clean registers. */
for (i = 0; i < 0x20; i += 4)
write32(mmiobase + RENDER_RING_BASE + i, 0);
for (i = 0; i < 0x20; i += 4)
write32(mmiobase + FENCE_REG_965_0 + i, 0);
/* Disable VGA. */
write32(mmiobase + VGACNTRL, VGA_DISP_DISABLE);
/* Disable pipes. */
write32(mmiobase + PIPECONF(0), 0);
write32(mmiobase + PIPECONF(1), 0);
/* Init PRB0. */
write32(mmiobase + HWS_PGA, 0x352d2000);
write32(mmiobase + PRB0_CTL, 0);
write32(mmiobase + PRB0_HEAD, 0);
write32(mmiobase + PRB0_TAIL, 0);
write32(mmiobase + PRB0_START, 0);
write32(mmiobase + PRB0_CTL, 0x0001f001);
write32(mmiobase + D_STATE, DSTATE_PLL_D3_OFF
| DSTATE_GFX_CLOCK_GATING | DSTATE_DOT_CLOCK_GATING);
write32(mmiobase + ECOSKPD, 0x00010000);
write32(mmiobase + HWSTAM, 0xeffe);
write32(mmiobase + PORT_HOTPLUG_EN, conf->gpu_hotplug);
write32(mmiobase + INSTPM, 0x08000000 | INSTPM_AGPBUSY_DIS);
/* p2 divisor must 7 for dual channel LVDS */
/* and 14 for single channel LVDS */
pixel_p2 = mode->lvds_dual_channel ? 7 : 14;
target_frequency = mode->pixel_clock;
/* Find suitable divisors, m1, m2, p1, n. */
/* refclock * (5 * (m1 + 2) + (m1 + 2)) / (n + 2) / p1 / p2 */
/* should be closest to target frequency as possible */
u32 candn, candm1, candm2, candp1;
for (candm1 = 8; candm1 <= 18; candm1++) {
for (candm2 = 3; candm2 <= 7; candm2++) {
for (candn = 1; candn <= 6; candn++) {
for (candp1 = 1; candp1 <= 8; candp1++) {
u32 m = 5 * (candm1 + 2) + (candm2 + 2);
u32 p = candp1 * pixel_p2;
u32 vco = DIV_ROUND_CLOSEST(BASE_FREQUENCY * m, candn + 2);
u32 dot = DIV_ROUND_CLOSEST(vco, p);
u32 this_err = MAX(dot, target_frequency) -
MIN(dot, target_frequency);
if ((m < 70) || (m > 120))
continue;
if (this_err < smallest_err) {
smallest_err = this_err;
pixel_n = candn;
pixel_m1 = candm1;
pixel_m2 = candm2;
pixel_p1 = candp1;
}
}
}
}
}
if (smallest_err == 0xffffffff) {
printk(BIOS_ERR, "Couldn't find GFX clock divisors\n");
return -1;
}
printk(BIOS_INFO, "bringing up panel at resolution %d x %d\n",
hactive, vactive);
printk(BIOS_DEBUG, "Borders %d x %d\n", right_border, bottom_border);
printk(BIOS_DEBUG, "Blank %d x %d\n", hblank, vblank);
printk(BIOS_DEBUG, "Sync %d x %d\n", hsync, vsync);
printk(BIOS_DEBUG, "Front porch %d x %d\n", hfront_porch, vfront_porch);
printk(BIOS_DEBUG, (conf->gpu_lvds_use_spread_spectrum_clock
? "Spread spectrum clock\n"
: "DREF clock\n"));
printk(BIOS_DEBUG, (mode->lvds_dual_channel
? "Dual channel\n"
: "Single channel\n"));
printk(BIOS_DEBUG, "Polarities %d, %d\n",
hpolarity, vpolarity);
printk(BIOS_DEBUG, "Pixel N=%d, M1=%d, M2=%d, P1=%d\n",
pixel_n, pixel_m1, pixel_m2, pixel_p1);
printk(BIOS_DEBUG, "Pixel clock %d kHz\n",
BASE_FREQUENCY * (5 * (pixel_m1 + 2) + (pixel_m2 + 2)) /
(pixel_n + 2) / (pixel_p1 * pixel_p2));
if (IS_ENABLED(CONFIG_LINEAR_FRAMEBUFFER)) {
/* Disable panel fitter (we're in native resolution). */
write32(mmiobase + PF_CTL(0), 0);
write32(mmiobase + PF_WIN_SZ(0), 0);
write32(mmiobase + PF_WIN_POS(0), 0);
write32(mmiobase + PFIT_PGM_RATIOS, 0);
write32(mmiobase + PFIT_CONTROL, 0);
} else {
write32(mmiobase + PF_WIN_SZ(0), vactive | (hactive << 16));
write32(mmiobase + PF_WIN_POS(0), 0);
write32(mmiobase + PF_CTL(0), PF_ENABLE | PF_FILTER_MED_3x3);
write32(mmiobase + PFIT_CONTROL, PFIT_ENABLE
| (1 << PFIT_PIPE_SHIFT) | HORIZ_AUTO_SCALE
| VERT_AUTO_SCALE);
}
mdelay(1);
write32(mmiobase + DSPCNTR(0), DISPPLANE_BGRX888
| DISPPLANE_SEL_PIPE_B | DISPPLANE_GAMMA_ENABLE);
mdelay(1);
write32(mmiobase + PP_CONTROL, PANEL_UNLOCK_REGS
| (read32(mmiobase + PP_CONTROL) & ~PANEL_UNLOCK_MASK));
write32(mmiobase + FP0(1),
(pixel_n << 16)
| (pixel_m1 << 8) | pixel_m2);
write32(mmiobase + DPLL(1),
DPLL_VGA_MODE_DIS |
DPLL_VCO_ENABLE | DPLLB_MODE_LVDS
| (mode->lvds_dual_channel ? DPLLB_LVDS_P2_CLOCK_DIV_7
: DPLLB_LVDS_P2_CLOCK_DIV_14)
| (conf->gpu_lvds_use_spread_spectrum_clock
? DPLL_INTEGRATED_CLOCK_VLV | DPLL_INTEGRATED_CRI_CLK_VLV
: 0)
| (0x10000 << (pixel_p1 - 1)));
mdelay(1);
write32(mmiobase + DPLL(1),
DPLL_VGA_MODE_DIS |
DPLL_VCO_ENABLE | DPLLB_MODE_LVDS
| (mode->lvds_dual_channel ? DPLLB_LVDS_P2_CLOCK_DIV_7
: DPLLB_LVDS_P2_CLOCK_DIV_14)
| ((conf->gpu_lvds_use_spread_spectrum_clock ? 3 : 0) << 13)
| (0x10000 << (pixel_p1 - 1)));
mdelay(1);
write32(mmiobase + HTOTAL(1),
((hactive + right_border + hblank - 1) << 16)
| (hactive - 1));
write32(mmiobase + HBLANK(1),
((hactive + right_border + hblank - 1) << 16)
| (hactive + right_border - 1));
write32(mmiobase + HSYNC(1),
((hactive + right_border + hfront_porch + hsync - 1) << 16)
| (hactive + right_border + hfront_porch - 1));
write32(mmiobase + VTOTAL(1), ((vactive + bottom_border + vblank - 1) << 16)
| (vactive - 1));
write32(mmiobase + VBLANK(1), ((vactive + bottom_border + vblank - 1) << 16)
| (vactive + bottom_border - 1));
write32(mmiobase + VSYNC(1),
((vactive + bottom_border + vfront_porch + vsync - 1) << 16)
| (vactive + bottom_border + vfront_porch - 1));
if (IS_ENABLED(CONFIG_LINEAR_FRAMEBUFFER)) {
write32(mmiobase + PIPESRC(1), ((hactive - 1) << 16)
| (vactive - 1));
} else {
write32(mmiobase + PIPESRC(1), (639 << 16) | 399);
}
mdelay(1);
write32(mmiobase + DSPSIZE(0), (hactive - 1) | ((vactive - 1) << 16));
write32(mmiobase + DSPPOS(0), 0);
edid.bytes_per_line = (edid.bytes_per_line + 63) & ~63;
write32(mmiobase + DSPADDR(0), 0);
write32(mmiobase + DSPSURF(0), 0);
write32(mmiobase + DSPSTRIDE(0), edid.bytes_per_line);
write32(mmiobase + DSPCNTR(0), DISPLAY_PLANE_ENABLE | DISPPLANE_BGRX888
| DISPPLANE_SEL_PIPE_B | DISPPLANE_GAMMA_ENABLE);
mdelay(1);
write32(mmiobase + PIPECONF(1), PIPECONF_ENABLE);
write32(mmiobase + LVDS, LVDS_ON
| (hpolarity << 20) | (vpolarity << 21)
| (mode->lvds_dual_channel ? LVDS_CLOCK_B_POWERUP_ALL
| LVDS_CLOCK_BOTH_POWERUP_ALL : 0)
| LVDS_CLOCK_A_POWERUP_ALL
| LVDS_PIPE(1));
write32(mmiobase + PP_CONTROL, PANEL_UNLOCK_REGS | PANEL_POWER_OFF);
write32(mmiobase + PP_CONTROL, PANEL_UNLOCK_REGS | PANEL_POWER_RESET);
mdelay(1);
write32(mmiobase + PP_CONTROL, PANEL_UNLOCK_REGS
| PANEL_POWER_ON | PANEL_POWER_RESET);
printk(BIOS_DEBUG, "waiting for panel powerup\n");
while (1) {
u32 reg32;
reg32 = read32(mmiobase + PP_STATUS);
if ((reg32 & PP_SEQUENCE_MASK) == PP_SEQUENCE_NONE)
break;
}
printk(BIOS_DEBUG, "panel powered up\n");
write32(mmiobase + PP_CONTROL, PANEL_POWER_ON | PANEL_POWER_RESET);
/* Clear interrupts. */
write32(mmiobase + DEIIR, 0xffffffff);
write32(mmiobase + SDEIIR, 0xffffffff);
write32(mmiobase + IIR, 0xffffffff);
write32(mmiobase + IMR, 0xffffffff);
write32(mmiobase + EIR, 0xffffffff);
if (gtt_setup(mmiobase)) {
printk(BIOS_ERR, "ERROR: GTT Setup Failed!!!\n");
return 0;
}
/* Setup GTT. */
reg16 = pci_read_config16(dev_find_slot(0, PCI_DEVFN(0, 0)), GGC);
uma_size = 0;
if (!(reg16 & 2)) {
uma_size = decode_igd_memory_size((reg16 >> 4) & 7);
printk(BIOS_DEBUG, "%dM UMA\n", uma_size >> 10);
}
for (i = 0; i < (uma_size - 256) / 4; i++) {
outl((i << 2) | 1, piobase);
outl(pphysbase + (i << 12) + 1, piobase + 4);
}
temp = read32(mmiobase + PGETBL_CTL);
printk(BIOS_INFO, "GTT PGETBL_CTL register: 0x%lx\n", temp);
if (temp & 1)
printk(BIOS_INFO, "GTT Enabled\n");
else
printk(BIOS_ERR, "ERROR: GTT is still Disabled!!!\n");
if (IS_ENABLED(CONFIG_LINEAR_FRAMEBUFFER)) {
printk(BIOS_SPEW, "memset %p to 0x00 for %d bytes\n",
(void *)pgfx, hactive * vactive * 4);
memset((void *)pgfx, 0x00, hactive * vactive * 4);
set_vbe_mode_info_valid(&edid, pgfx);
} else {
vga_misc_write(0x67);
write32(mmiobase + DSPCNTR(0), DISPPLANE_SEL_PIPE_B);
write32(mmiobase + VGACNTRL, 0x02c4008e
| VGA_PIPE_B_SELECT);
vga_textmode_init();
}
return 0;
}
static int intel_gma_init_vga(struct northbridge_intel_i945_config *conf,
unsigned int pphysbase, unsigned int piobase,
u8 *mmiobase, unsigned int pgfx)
{
int i;
u32 hactive, vactive;
u16 reg16;
u32 uma_size;
printk(BIOS_SPEW, "mmiobase %x addrport %x physbase %x\n",
(u32)mmiobase, piobase, pphysbase);
gtt_setup(mmiobase);
/* Disable VGA. */
write32(mmiobase + VGACNTRL, VGA_DISP_DISABLE);
/* Disable pipes. */
write32(mmiobase + PIPECONF(0), 0);
write32(mmiobase + PIPECONF(1), 0);
write32(mmiobase + INSTPM, 0x800);
vga_gr_write(0x18, 0);
write32(mmiobase + VGA0, 0x200074);
write32(mmiobase + VGA1, 0x200074);
write32(mmiobase + DSPFW3, 0x7f3f00c1 & ~PINEVIEW_SELF_REFRESH_EN);
write32(mmiobase + DSPCLK_GATE_D, 0);
write32(mmiobase + FW_BLC, 0x03060106);
write32(mmiobase + FW_BLC2, 0x00000306);
write32(mmiobase + ADPA, ADPA_DAC_ENABLE
| ADPA_PIPE_A_SELECT
| ADPA_USE_VGA_HVPOLARITY
| ADPA_VSYNC_CNTL_ENABLE
| ADPA_HSYNC_CNTL_ENABLE
| ADPA_DPMS_ON
);
write32(mmiobase + 0x7041c, 0x0);
write32(mmiobase + DPLL_MD(0), 0x3);
write32(mmiobase + DPLL_MD(1), 0x3);
write32(mmiobase + DSPCNTR(1), 0x1000000);
write32(mmiobase + PIPESRC(1), 0x027f01df);
vga_misc_write(0x67);
const u8 cr[] = { 0x5f, 0x4f, 0x50, 0x82, 0x55, 0x81, 0xbf, 0x1f,
0x00, 0x4f, 0x0d, 0x0e, 0x00, 0x00, 0x00, 0x00,
0x9c, 0x8e, 0x8f, 0x28, 0x1f, 0x96, 0xb9, 0xa3,
0xff
};
vga_cr_write(0x11, 0);
for (i = 0; i <= 0x18; i++)
vga_cr_write(i, cr[i]);
// Disable screen memory to prevent garbage from appearing.
vga_sr_write(1, vga_sr_read(1) | 0x20);
hactive = 640;
vactive = 400;
mdelay(1);
write32(mmiobase + DPLL(0),
DPLL_VCO_ENABLE | DPLLB_MODE_DAC_SERIAL
| DPLL_VGA_MODE_DIS
| DPLL_DAC_SERIAL_P2_CLOCK_DIV_10
| 0x400601
);
mdelay(1);
write32(mmiobase + DPLL(0),
DPLL_VCO_ENABLE | DPLLB_MODE_DAC_SERIAL
| DPLL_VGA_MODE_DIS
| DPLL_DAC_SERIAL_P2_CLOCK_DIV_10
| 0x400601
);
write32(mmiobase + ADPA, ADPA_DAC_ENABLE
| ADPA_PIPE_A_SELECT
| ADPA_USE_VGA_HVPOLARITY
| ADPA_VSYNC_CNTL_ENABLE
| ADPA_HSYNC_CNTL_ENABLE
| ADPA_DPMS_ON
);
write32(mmiobase + HTOTAL(0),
((hactive - 1) << 16)
| (hactive - 1));
write32(mmiobase + HBLANK(0),
((hactive - 1) << 16)
| (hactive - 1));
write32(mmiobase + HSYNC(0),
((hactive - 1) << 16)
| (hactive - 1));
write32(mmiobase + VTOTAL(0), ((vactive - 1) << 16)
| (vactive - 1));
write32(mmiobase + VBLANK(0), ((vactive - 1) << 16)
| (vactive - 1));
write32(mmiobase + VSYNC(0),
((vactive - 1) << 16)
| (vactive - 1));
write32(mmiobase + PF_WIN_POS(0), 0);
write32(mmiobase + PIPESRC(0), (639 << 16) | 399);
write32(mmiobase + PF_CTL(0), PF_ENABLE | PF_FILTER_MED_3x3);
write32(mmiobase + PF_WIN_SZ(0), vactive | (hactive << 16));
write32(mmiobase + PFIT_CONTROL, 0x0);
mdelay(1);
write32(mmiobase + FDI_RX_CTL(0), 0x00002040);
mdelay(1);
write32(mmiobase + FDI_RX_CTL(0), 0x80002050);
write32(mmiobase + FDI_TX_CTL(0), 0x00044000);
mdelay(1);
write32(mmiobase + FDI_TX_CTL(0), 0x80044000);
write32(mmiobase + PIPECONF(0), PIPECONF_ENABLE | PIPECONF_BPP_6 | PIPECONF_DITHER_EN);
write32(mmiobase + VGACNTRL, 0x0);
write32(mmiobase + DSPCNTR(0), DISPLAY_PLANE_ENABLE | DISPPLANE_BGRX888);
mdelay(1);
write32(mmiobase + ADPA, ADPA_DAC_ENABLE
| ADPA_PIPE_A_SELECT
| ADPA_USE_VGA_HVPOLARITY
| ADPA_VSYNC_CNTL_ENABLE
| ADPA_HSYNC_CNTL_ENABLE
| ADPA_DPMS_ON
);
write32(mmiobase + DSPFW3, 0x7f3f00c1);
write32(mmiobase + MI_MODE, 0x200 | VS_TIMER_DISPATCH);
write32(mmiobase + CACHE_MODE_0, (0x6820 | (1 << 9)) & ~(1 << 5));
write32(mmiobase + CACHE_MODE_1, 0x380 & ~(1 << 9));
/* Set up GTT. */
reg16 = pci_read_config16(dev_find_slot(0, PCI_DEVFN(0, 0)), GGC);
uma_size = 0;
if (!(reg16 & 2)) {
uma_size = decode_igd_memory_size((reg16 >> 4) & 7);
printk(BIOS_DEBUG, "%dM UMA\n", uma_size >> 10);
}
for (i = 0; i < (uma_size - 256) / 4; i++) {
outl((i << 2) | 1, piobase);
outl(pphysbase + (i << 12) + 1, piobase + 4);
}
/* Clear interrupts. */
write32(mmiobase + DEIIR, 0xffffffff);
write32(mmiobase + SDEIIR, 0xffffffff);
write32(mmiobase + IIR, 0xffffffff);
write32(mmiobase + IMR, 0xffffffff);
write32(mmiobase + EIR, 0xffffffff);
vga_textmode_init();
/* Enable screen memory. */
vga_sr_write(1, vga_sr_read(1) & ~0x20);
return 0;
}
/* compare the header of the vga edid header */
/* if vga is not connected it should have a correct header */
static int probe_edid(u8 *mmiobase, u8 slave)
{
int i;
u8 vga_edid[128];
u8 header[8] = {0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00};
intel_gmbus_read_edid(mmiobase + GMBUS0, slave, 0x50, vga_edid, 128);
intel_gmbus_stop(mmiobase + GMBUS0);
for (i = 0; i < 8; i++) {
if (vga_edid[i] != header[i]) {
printk(BIOS_DEBUG, "No display connected on slave %d\n",
slave);
return 0;
}
}
printk(BIOS_SPEW, "Found a display on slave %d\n", slave);
return 1;
}
static u32 get_cdclk(struct device *const dev)
{
u16 gcfgc = pci_read_config16(dev, GCFGC);
if (gcfgc & GC_LOW_FREQUENCY_ENABLE) {
return 133333333;
} else {
switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
case GC_DISPLAY_CLOCK_333_320_MHZ:
return 320000000;
default:
case GC_DISPLAY_CLOCK_190_200_MHZ:
return 200000000;
}
}
}
static u32 freq_to_blc_pwm_ctl(struct device *const dev, u16 pwm_freq)
{
u32 blc_mod;
/* Set duty cycle to 100% due to use of legacy backlight control */
blc_mod = get_cdclk(dev) / (32 * pwm_freq);
return BLM_LEGACY_MODE | ((blc_mod / 2) << 17) | ((blc_mod / 2) << 1);
}
static void panel_setup(u8 *mmiobase, struct device *const dev)
{
const struct northbridge_intel_i945_config *const conf = dev->chip_info;
u32 reg32;
/* Set up Panel Power On Delays */
reg32 = (conf->gpu_panel_power_up_delay & 0x1fff) << 16;
reg32 |= (conf->gpu_panel_power_backlight_on_delay & 0x1fff);
write32(mmiobase + PP_ON_DELAYS, reg32);
/* Set up Panel Power Off Delays */
reg32 = (conf->gpu_panel_power_down_delay & 0x1fff) << 16;
reg32 |= (conf->gpu_panel_power_backlight_off_delay & 0x1fff);
write32(mmiobase + PP_OFF_DELAYS, reg32);
/* Set up Panel Power Cycle Delay */
reg32 = (get_cdclk(dev) / 20000 - 1) << PP_REFERENCE_DIVIDER_SHIFT;
reg32 |= conf->gpu_panel_power_cycle_delay & 0x1f;
write32(mmiobase + PP_DIVISOR, reg32);
/* Backlight init. */
if (conf->pwm_freq)
write32(mmiobase + BLC_PWM_CTL, freq_to_blc_pwm_ctl(dev,
conf->pwm_freq));
else
write32(mmiobase + BLC_PWM_CTL, freq_to_blc_pwm_ctl(dev,
DEFAULT_BLC_PWM));
}
static void gma_func0_init(struct device *dev)
{
u32 reg32;
/* Unconditionally reset graphics */
pci_write_config8(dev, GDRST, 1);
udelay(50);
pci_write_config8(dev, GDRST, 0);
/* wait for device to finish */
while (pci_read_config8(dev, GDRST) & 1)
;
/* IGD needs to be Bus Master */
reg32 = pci_read_config32(dev, PCI_COMMAND);
pci_write_config32(dev, PCI_COMMAND, reg32 | PCI_COMMAND_MASTER
| PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
if (IS_ENABLED(CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT)) {
/* This should probably run before post VBIOS init. */
printk(BIOS_SPEW, "Initializing VGA without OPROM.\n");
void *mmiobase;
u32 iobase, graphics_base;
struct northbridge_intel_i945_config *conf = dev->chip_info;
iobase = dev->resource_list[1].base;
mmiobase = (void *)(uintptr_t)dev->resource_list[0].base;
graphics_base = dev->resource_list[2].base;
printk(BIOS_SPEW, "GMADR = 0x%08x GTTADR = 0x%08x\n",
pci_read_config32(dev, GMADR),
pci_read_config32(dev, GTTADR)
);
int err;
if (IS_ENABLED(CONFIG_NORTHBRIDGE_INTEL_SUBTYPE_I945GM))
panel_setup(mmiobase, dev);
/* probe if VGA is connected and always run */
/* VGA init if no LVDS is connected */
if (!probe_edid(mmiobase, 3) || probe_edid(mmiobase, 2))
err = intel_gma_init_vga(conf,
pci_read_config32(dev, 0x5c) & ~0xf,
iobase, mmiobase, graphics_base);
else
err = intel_gma_init_lvds(conf,
pci_read_config32(dev, 0x5c) & ~0xf,
iobase, mmiobase, graphics_base);
if (err == 0)
gfx_set_init_done(1);
/* Linux relies on VBT for panel info. */
if (CONFIG_NORTHBRIDGE_INTEL_SUBTYPE_I945GM) {
generate_fake_intel_oprom(&conf->gfx, dev,
"$VBT CALISTOGA");
}
if (CONFIG_NORTHBRIDGE_INTEL_SUBTYPE_I945GC) {
generate_fake_intel_oprom(&conf->gfx, dev,
"$VBT LAKEPORT-G");
}
} else {
/* PCI Init, will run VBIOS */
pci_dev_init(dev);
}
}
/* This doesn't reclaim stolen UMA memory, but IGD could still
be re-enabled later. */
static void gma_func0_disable(struct device *dev)
{
struct device *dev_host = dev_find_slot(0, PCI_DEVFN(0x0, 0));
pci_write_config16(dev, GCFC, 0xa00);
pci_write_config16(dev_host, GGC, (1 << 1));
unsigned int reg32 = pci_read_config32(dev_host, DEVEN);
reg32 &= ~(DEVEN_D2F0 | DEVEN_D2F1);
pci_write_config32(dev_host, DEVEN, reg32);
dev->enabled = 0;
}
static void gma_func1_init(struct device *dev)
{
u32 reg32;
u8 val;
/* IGD needs to be Bus Master, also enable IO access */
reg32 = pci_read_config32(dev, PCI_COMMAND);
pci_write_config32(dev, PCI_COMMAND, reg32 |
PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO);
if (get_option(&val, "tft_brightness") == CB_SUCCESS)
pci_write_config8(dev, 0xf4, val);
else
pci_write_config8(dev, 0xf4, 0xff);
}
static void gma_set_subsystem(device_t dev, unsigned int vendor,
unsigned int device)
{
if (!vendor || !device) {
pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
pci_read_config32(dev, PCI_VENDOR_ID));
} else {
pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
((device & 0xffff) << 16) | (vendor & 0xffff));
}
}
const struct i915_gpu_controller_info *
intel_gma_get_controller_info(void)
{
device_t dev = dev_find_slot(0, PCI_DEVFN(0x2, 0));
if (!dev)
return NULL;
struct northbridge_intel_i945_config *chip = dev->chip_info;
if (!chip)
return NULL;
return &chip->gfx;
}
static void gma_ssdt(device_t device)
{
const struct i915_gpu_controller_info *gfx = intel_gma_get_controller_info();
if (!gfx)
return;
drivers_intel_gma_displays_ssdt_generate(gfx);
}
static void gma_func0_read_resources(device_t dev)
{
u8 reg8;
/* Set Untrusted Aperture Size to 256mb */
reg8 = pci_read_config8(dev, MSAC);
reg8 &= ~0x3;
reg8 |= 0x2;
pci_write_config8(dev, MSAC, reg8);
pci_dev_read_resources(dev);
}
static struct pci_operations gma_pci_ops = {
.set_subsystem = gma_set_subsystem,
};
static struct device_operations gma_func0_ops = {
.read_resources = gma_func0_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = gma_func0_init,
.acpi_fill_ssdt_generator = gma_ssdt,
.scan_bus = 0,
.enable = 0,
.disable = gma_func0_disable,
.ops_pci = &gma_pci_ops,
};
static struct device_operations gma_func1_ops = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = gma_func1_init,
.scan_bus = 0,
.enable = 0,
.ops_pci = &gma_pci_ops,
};
static const unsigned short i945_gma_func0_ids[] = {
0x2772, /* 82945G/GZ Integrated Graphics Controller */
0x27a2, /* Mobile 945GM/GMS Express Integrated Graphics Controller*/
0x27ae, /* Mobile 945GSE Express Integrated Graphics Controller */
0
};
static const unsigned short i945_gma_func1_ids[] = {
0x27a6, /* Mobile 945GM/GMS/GME Express Integrated Graphics Controller */
0
};
static const struct pci_driver i945_gma_func0_driver __pci_driver = {
.ops = &gma_func0_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.devices = i945_gma_func0_ids,
};
static const struct pci_driver i945_gma_func1_driver __pci_driver = {
.ops = &gma_func1_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.devices = i945_gma_func1_ids,
};
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