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// Geode GX2/LX VGA functions
//
// Copyright (C) 2009 Chris Kindt
//
// Written for Google Summer of Code 2009 for the coreboot project
//
// This file may be distributed under the terms of the GNU LGPLv3 license.
#include "geodevga.h" // geodevga_init
#include "farptr.h" // SET_FARVAR
#include "biosvar.h" // GET_BDA
#include "vgabios.h" // VGAREG_*
#include "util.h" // memset
#include "stdvga.h" // stdvga_crtc_write
#include "pci.h" // pci_config_readl
#include "pci_regs.h" // PCI_BASE_ADDRESS_0
/****************************************************************
* MSR and High Mem access through VSA Virtual Register
****************************************************************/
static u64 geode_msr_read(u32 msrAddr)
{
union u64_u32_u val;
asm __volatile__ (
"movw $0x0AC1C, %%dx \n"
"movl $0xFC530007, %%eax \n"
"outl %%eax, %%dx \n"
"addb $2, %%dl \n"
"inw %%dx, %%ax \n"
: "=a" (val.lo), "=d"(val.hi)
: "c"(msrAddr)
: "cc"
);
return val.val;
}
static void geode_msr_mask(u32 msrAddr, u64 off, u64 on)
{
union u64_u32_u uand, uor;
uand.val = ~off;
uor.val = on;
asm __volatile__ (
"push %%eax \n"
"movw $0x0AC1C, %%dx \n"
"movl $0xFC530007, %%eax \n"
"outl %%eax, %%dx \n"
"addb $2, %%dl \n"
"pop %%eax \n"
"outw %%ax, %%dx \n"
:
: "c"(msrAddr), "S" (uand.hi), "D" (uand.lo), "b" (uor.hi), "a" (uor.lo)
: "%edx","cc"
);
}
static u32 geode_mem_read(u32 addr)
{
u32 val;
asm __volatile__ (
"movw $0x0AC1C, %%dx \n"
"movl $0xFC530001, %%eax \n"
"outl %%eax, %%dx \n"
"addb $2, %%dl \n"
"inw %%dx, %%ax \n"
: "=a" (val)
: "b"(addr)
: "cc"
);
return val;
}
static void geode_mem_mask(u32 addr, u32 off, u32 or)
{
asm __volatile__ (
"movw $0x0AC1C, %%dx \n"
"movl $0xFC530001, %%eax \n"
"outl %%eax, %%dx \n"
"addb $2, %%dl \n"
"outw %%ax, %%dx \n"
:
: "b"(addr), "S" (~off), "D" (or)
: "%eax","cc"
);
}
/****************************************************************
* Helper functions
****************************************************************/
struct geode {
u32 fb;
u32 dc;
u32 vp;
};
struct geode geode VAR16;
static u32 geode_dc_read(int reg)
{
u32 val = geode_mem_read(geode.dc + reg);
dprintf(4, "%s(0x%08x) = 0x%08x\n", __func__, geode.dc + reg, val);
return val;
}
static void geode_dc_write(int reg, u32 val)
{
dprintf(4, "%s(0x%08x, 0x%08x)\n", __func__, geode.dc + reg, val);
geode_mem_mask(geode.dc + reg, ~0, val);
}
static void geode_dc_mask(int reg, u32 off, u32 on)
{
dprintf(4, "%s(0x%08x, 0x%08x, 0x%08x)\n", __func__, geode.dc + reg, off, on);
geode_mem_mask(geode.dc + reg, off, on);
}
static u32 geode_vp_read(int reg)
{
u32 val = geode_mem_read(geode.vp + reg);
dprintf(4, "%s(0x%08x) = 0x%08x\n", __func__, geode.vp + reg, val);
return val;
}
static void geode_vp_write(int reg, u32 val)
{
dprintf(4, "%s(0x%08x, 0x%08x)\n", __func__, geode.vp + reg, val);
geode_mem_mask(geode.vp + reg, ~0, val);
}
static void geode_vp_mask(int reg, u32 off, u32 on)
{
dprintf(4, "%s(0x%08x, 0x%08x, 0x%08x)\n", __func__, geode.vp + reg, off, on);
geode_mem_mask(geode.vp + reg, off, on);
}
static int legacyio_check(void)
{
int ret=0;
u64 val;
if (CONFIG_VGA_GEODEGX2)
val = geode_msr_read(GLIU0_P2D_BM_4);
else
val = geode_msr_read(MSR_GLIU0_BASE4);
if ((val & 0xffffffff) != 0x0A0fffe0)
ret|=1;
val = geode_msr_read(GLIU0_IOD_BM_0);
if ((val & 0xffffffff) != 0x3c0ffff0)
ret|=2;
val = geode_msr_read(GLIU0_IOD_BM_1);
if ((val & 0xffffffff) != 0x3d0ffff0)
ret|=4;
return ret;
}
static u32 framebuffer_size(void)
{
/* We use the P2D_R0 msr to read out the number of pages.
* One page has a size of 4k
*
* Bit Name Description
* 39:20 PMAX Physical Memory Address Max
* 19:0 PMIX Physical Memory Address Min
*
*/
u64 msr = geode_msr_read(GLIU0_P2D_RO);
u32 pmax = (msr >> 20) & 0x000fffff;
u32 pmin = msr & 0x000fffff;
u32 val = pmax - pmin;
val += 1;
/* The page size is 4k */
return (val << 12);
}
/****************************************************************
* Init Functions
****************************************************************/
/* Set up the dc (display controller) portion of the geodelx
* The dc provides hardware support for VGA graphics.
*/
static void dc_setup(void)
{
dprintf(2, "DC_SETUP\n");
geode_dc_write(DC_UNLOCK, DC_LOCK_UNLOCK);
/* zero memory config */
geode_dc_write(DC_FB_ST_OFFSET, 0x0);
geode_dc_write(DC_CB_ST_OFFSET, 0x0);
geode_dc_write(DC_CURS_ST_OFFSET, 0x0);
/* read fb-bar from pci, then point dc to the fb base */
u32 dc_fb = geode_dc_read(DC_GLIU0_MEM_OFFSET);
if (geode.fb != dc_fb) {
geode_dc_write(DC_GLIU0_MEM_OFFSET, geode.fb);
}
geode_dc_mask(DC_DISPLAY_CFG, ~DC_CFG_MSK, DC_GDEN|DC_TRUP);
geode_dc_write(DC_GENERAL_CFG, DC_VGAE);
geode_dc_write(DC_UNLOCK, DC_LOCK_LOCK);
u32 fb_size = framebuffer_size(); // in byte
dprintf(1, "%d KB of video memory at 0x%08x\n", fb_size / 1024, geode.fb);
/* update VBE variables */
SET_VGA(VBE_framebuffer, geode.fb);
SET_VGA(VBE_total_memory, fb_size / 1024 / 64); // number of 64K blocks
}
/* Setup the vp (video processor) portion of the geodelx
* Under VGA modes the vp was handled by softvg from inside VSA2.
* Without a softvg module, access is only available through a pci bar.
* The High Mem Access virtual register is used to configure the
* pci mmio bar from 16bit friendly io space.
*/
static void vp_setup(void)
{
dprintf(2,"VP_SETUP\n");
/* set output to crt and RGB/YUV */
if (CONFIG_VGA_GEODEGX2)
geode_msr_mask(VP_MSR_CONFIG_GX2, 0xf8, 0);
else
geode_msr_mask(VP_MSR_CONFIG_LX, 0xf8, 0);
/* Set mmio registers
* there may be some timing issues here, the reads seem
* to slow things down enough work reliably
*/
u32 reg = geode_vp_read(VP_MISC);
dprintf(1,"VP_SETUP VP_MISC=0x%08x\n",reg);
geode_vp_write(VP_MISC, VP_BYP_BOTH);
reg = geode_vp_read(VP_MISC);
dprintf(1,"VP_SETUP VP_MISC=0x%08x\n",reg);
reg = geode_vp_read(VP_DCFG);
dprintf(1,"VP_SETUP VP_DCFG=0x%08x\n",reg);
geode_vp_mask(VP_DCFG, 0, VP_CRT_EN|VP_HSYNC_EN|VP_VSYNC_EN|VP_DAC_BL_EN|VP_CRT_SKEW);
reg = geode_vp_read(VP_DCFG);
dprintf(1,"VP_SETUP VP_DCFG=0x%08x\n",reg);
}
static u8 geode_crtc_01[] VAR16 = {
0x2d, 0x27, 0x28, 0x90, 0x29, 0x8e, 0xbf, 0x1f,
0x00, 0x4f, 0x0d, 0x0e, 0x00, 0x00, 0x00, 0x00,
0x9b, 0x8d, 0x8f, 0x14, 0x1f, 0x97, 0xb9, 0xa3,
0xff };
static u8 geode_crtc_03[] VAR16 = {
0x5f, 0x4f, 0x50, 0x82, 0x51, 0x9e, 0xbf, 0x1f,
0x00, 0x4f, 0x0d, 0x0e, 0x00, 0x00, 0x00, 0x00,
0x9b, 0x8d, 0x8f, 0x28, 0x1f, 0x97, 0xb9, 0xa3,
0xff };
static u8 geode_crtc_04[] VAR16 = {
0x2d, 0x27, 0x28, 0x90, 0x29, 0x8e, 0xbf, 0x1f,
0x00, 0xc1, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x9b, 0x8d, 0x8f, 0x14, 0x00, 0x97, 0xb9, 0xa2,
0xff };
static u8 geode_crtc_05[] VAR16 = {
0x2d, 0x27, 0x28, 0x90, 0x29, 0x8e, 0xbf, 0x1f,
0x00, 0xc1, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x9b, 0x8e, 0x8f, 0x14, 0x00, 0x97, 0xb9, 0xa2,
0xff };
static u8 geode_crtc_06[] VAR16 = {
0x5f, 0x4f, 0x50, 0x82, 0x51, 0x9e, 0xbf, 0x1f,
0x00, 0xc1, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x9b, 0x8d, 0x8f, 0x28, 0x00, 0x97, 0xb9, 0xc2,
0xff };
static u8 geode_crtc_07[] VAR16 = {
0x5f, 0x4f, 0x50, 0x82, 0x51, 0x9e, 0xbf, 0x1f,
0x00, 0x4f, 0x0d, 0x0e, 0x00, 0x00, 0x00, 0x00,
0x9b, 0x8d, 0x8f, 0x28, 0x0f, 0x97, 0xb9, 0xa3,
0xff };
static u8 geode_crtc_0d[] VAR16 = {
0x2d, 0x27, 0x28, 0x90, 0x29, 0x8e, 0xbf, 0x1f,
0x00, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x9b, 0x8d, 0x8f, 0x14, 0x00, 0x97, 0xb9, 0xe3,
0xff };
static u8 geode_crtc_0e[] VAR16 = {
0x5f, 0x4f, 0x50, 0x82, 0x51, 0x9e, 0xbf, 0x1f,
0x00, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x9b, 0x8d, 0x8f, 0x28, 0x00, 0x97, 0xb9, 0xe3,
0xff };
static u8 geode_crtc_0f[] VAR16 = {
0x5f, 0x4f, 0x50, 0x82, 0x51, 0x9e, 0xbf, 0x1f,
0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x83, 0x85, 0x5d, 0x28, 0x0f, 0x65, 0xb9, 0xe3,
0xff };
static u8 geode_crtc_11[] VAR16 = {
0x5f, 0x4f, 0x50, 0x82, 0x51, 0x9e, 0x0b, 0x3e,
0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xe9, 0x8b, 0xdf, 0x28, 0x00, 0xe7, 0x04, 0xe3,
0xff };
static u8 geode_crtc_13[] VAR16 = {
0x5f, 0x4f, 0x50, 0x82, 0x51, 0x9e, 0xbf, 0x1f,
0x00, 0x41, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x9b, 0x8d, 0x8f, 0x28, 0x40, 0x98, 0xb9, 0xa3,
0xff };
int geodevga_init(void)
{
int ret = stdvga_init();
if (ret)
return ret;
dprintf(1,"GEODEVGA_INIT\n");
if ((ret=legacyio_check())) {
dprintf(1,"GEODEVGA_INIT legacyio_check=0x%x\n",ret);
}
// Updated timings from geode datasheets, table 6-53 in particular
static u8 *new_crtc[] VAR16 = {
geode_crtc_01, geode_crtc_01, geode_crtc_03, geode_crtc_03,
geode_crtc_04, geode_crtc_05, geode_crtc_06, geode_crtc_07,
0, 0, 0, 0, 0,
geode_crtc_0d, geode_crtc_0e, geode_crtc_0f, geode_crtc_0f,
geode_crtc_11, geode_crtc_11, geode_crtc_13 };
int i;
for (i=0; i<ARRAY_SIZE(new_crtc); i++) {
u8 *crtc = GET_GLOBAL(new_crtc[i]);
if (crtc)
stdvga_override_crtc(i, crtc);
}
if (GET_GLOBAL(VgaBDF) < 0)
// Device should be at 00:01.1
SET_VGA(VgaBDF, pci_to_bdf(0, 1, 1));
// setup geode struct which is used for register access
geode.fb = pci_config_readl(GET_GLOBAL(VgaBDF), PCI_BASE_ADDRESS_0);
geode.dc = pci_config_readl(GET_GLOBAL(VgaBDF), PCI_BASE_ADDRESS_2);
geode.vp = pci_config_readl(GET_GLOBAL(VgaBDF), PCI_BASE_ADDRESS_3);
dprintf(1, "fb addr: 0x%08x\n", geode.fb);
dprintf(1, "dc addr: 0x%08x\n", geode.dc);
dprintf(1, "vp addr: 0x%08x\n", geode.vp);
vp_setup();
dc_setup();
return 0;
}