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Enable graphic output protocol driver #42

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Merged
sysopenci merged 1 commit into from
Apr 21, 2025
Merged

Enable graphic output protocol driver #42

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35 changes: 30 additions & 5 deletions drivers/gop/gop.c
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,7 @@
#include <pci/pci.h>
#include <arch/io.h>
#include <hwconfig.h>
#include <ewlog.h>

#include "gop.h"

Expand Down Expand Up @@ -150,6 +151,8 @@ set_mode(EFI_GRAPHICS_OUTPUT_PROTOCOL *This,

gop->fb = get_framebuffer(gop->dev, gop->pipe);
set_efi_color_order(gop->dev);

ewdbg("set_mode fb = 0x%x", gop->fb);
return gop->fb ? EFI_SUCCESS : EFI_DEVICE_ERROR;
}

Expand Down Expand Up @@ -236,9 +239,7 @@ static struct supported_device {
u16 did;
} SUPPORTED_DEVICES[] ={
{ .vid = 0x8086, .did = VGA_PID },
{ .vid = 0x8086, .did = VGA_PID2 },
};

static EFI_STATUS gop_init(EFI_SYSTEM_TABLE *st)
{
static gop_t gop_default = {
Expand All @@ -251,6 +252,8 @@ static EFI_STATUS gop_init(EFI_SYSTEM_TABLE *st)
};
pcidev_t pci_dev = 0;
size_t i;
uint16_t command;
uint32_t mmio;

if (!st)
return EFI_INVALID_PARAMETER;
Expand All @@ -264,14 +267,36 @@ static EFI_STATUS gop_init(EFI_SYSTEM_TABLE *st)
&pci_dev))
break;

ewdbg("VGA pci_dev = %x", pci_dev);
if (!pci_dev)
return EFI_UNSUPPORTED;

mmio = pci_read_config32(pci_dev, 0x10);
ewdbg("VGA mmio BAR0 = %x", mmio);
if ((mmio & 0x6) == 0x4) {
/* Stop memory space access */
command = pci_read_config32(pci_dev, 0x4) & 0xffff;
command &= ~0x02;
pci_write_config32(pci_dev, 0x04, command);

/* Re-config PCI BAR from 64bits to 32bits */
pci_write_config32(pci_dev, 0x14, 0x0);
pci_write_config32(pci_dev, 0x10, PLAN_CTRL_ADDR);
pci_write_config32(pci_dev, 0x1c, 0x0);
pci_write_config32(pci_dev, 0x18, PLAN_FB_ADDR);

/* Restart memory space access */
command = pci_read_config32(pci_dev, 0x4) & 0xffff;
command |= 0x02;
pci_write_config32(pci_dev, 0x04, command);
}

gop_default.dev = pci_dev;
get_resolution(pci_dev, &info.HorizontalResolution,
&info.VerticalResolution,
&gop_default.pipe);

&info.VerticalResolution,
&gop_default.pipe);
ewdbg("HorizontalResolution = %u, VerticalResolution, = %u ", \
info.HorizontalResolution,info.VerticalResolution);
/* If the BIOS has not programmed any surface, silently
disable the Graphical Output Protocol. */
if (!info.HorizontalResolution || !info.VerticalResolution)
Expand Down
8 changes: 8 additions & 0 deletions drivers/gop/gop.h
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Original file line number Diff line number Diff line change
Expand Up @@ -36,4 +36,12 @@

extern ewdrv_t gop_drv;

/* VGA compatible controller */
#define VGA_PID 0xa7a0
#define IGD_BUS_NUM 0
#define IGD_DEV_NUM 2
#define IGD_FUN_NUM 0
#define PLAN_FB_ADDR 0xB0000000
#define PLAN_CTRL_ADDR 0xA0000000

#endif /* _GOP_H_ */