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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2010 Matt Turner.
* Copyright 2012 Red Hat
*
* Authors: Matthew Garrett
* Matt Turner
* Dave Airlie
*/
#include <linux/pci.h>
#include "mgag200_drv.h"
static int mga_probe_vram(struct mga_device *mdev, void __iomem *mem)
{
int offset;
int orig;
int test1, test2;
int orig1, orig2;
unsigned int vram_size;
/* Probe */
orig = ioread16(mem);
iowrite16(0, mem);
vram_size = mdev->mc.vram_window;
if ((mdev->type == G200_EW3) && (vram_size >= 0x1000000)) {
vram_size = vram_size - 0x400000;
}
for (offset = 0x100000; offset < vram_size; offset += 0x4000) {
orig1 = ioread8(mem + offset);
orig2 = ioread8(mem + offset + 0x100);
iowrite16(0xaa55, mem + offset);
iowrite16(0xaa55, mem + offset + 0x100);
test1 = ioread16(mem + offset);
test2 = ioread16(mem);
iowrite16(orig1, mem + offset);
iowrite16(orig2, mem + offset + 0x100);
if (test1 != 0xaa55) {
break;
}
if (test2) {
break;
}
}
iowrite16(orig, mem);
return offset - 65536;
}
/* Map the framebuffer from the card and configure the core */
static int mga_vram_init(struct mga_device *mdev)
{
struct drm_device *dev = mdev->dev;
void __iomem *mem;
/* BAR 0 is VRAM */
mdev->mc.vram_base = pci_resource_start(dev->pdev, 0);
mdev->mc.vram_window = pci_resource_len(dev->pdev, 0);
if (!devm_request_mem_region(dev->dev, mdev->mc.vram_base,
mdev->mc.vram_window, "mgadrmfb_vram")) {
DRM_ERROR("can't reserve VRAM\n");
return -ENXIO;
}
mem = pci_iomap(dev->pdev, 0, 0);
if (!mem)
return -ENOMEM;
mdev->mc.vram_size = mga_probe_vram(mdev, mem);
pci_iounmap(dev->pdev, mem);
return 0;
}
int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
{
struct mga_device *mdev;
int ret, option;
mdev = devm_kzalloc(dev->dev, sizeof(struct mga_device), GFP_KERNEL);
if (mdev == NULL)
return -ENOMEM;
dev->dev_private = (void *)mdev;
mdev->dev = dev;
mdev->flags = mgag200_flags_from_driver_data(flags);
mdev->type = mgag200_type_from_driver_data(flags);
pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
mdev->has_sdram = !(option & (1 << 14));
/* BAR 0 is the framebuffer, BAR 1 contains registers */
mdev->rmmio_base = pci_resource_start(dev->pdev, 1);
mdev->rmmio_size = pci_resource_len(dev->pdev, 1);
if (!devm_request_mem_region(dev->dev, mdev->rmmio_base,
mdev->rmmio_size, "mgadrmfb_mmio")) {
drm_err(dev, "can't reserve mmio registers\n");
return -ENOMEM;
}
mdev->rmmio = pcim_iomap(dev->pdev, 1, 0);
if (mdev->rmmio == NULL)
return -ENOMEM;
/* stash G200 SE model number for later use */
if (IS_G200_SE(mdev)) {
mdev->unique_rev_id = RREG32(0x1e24);
drm_dbg(dev, "G200 SE unique revision id is 0x%x\n",
mdev->unique_rev_id);
}
ret = mga_vram_init(mdev);
if (ret)
return ret;
ret = mgag200_mm_init(mdev);
if (ret)
goto err_mm;
ret = mgag200_modeset_init(mdev);
if (ret) {
drm_err(dev, "Fatal error during modeset init: %d\n", ret);
goto err_mgag200_mm_fini;
}
ret = mgag200_cursor_init(mdev);
if (ret)
drm_err(dev, "Could not initialize cursors. Not doing hardware cursors.\n");
return 0;
err_mgag200_mm_fini:
mgag200_mm_fini(mdev);
err_mm:
dev->dev_private = NULL;
return ret;
}
void mgag200_driver_unload(struct drm_device *dev)
{
struct mga_device *mdev = to_mga_device(dev);
if (mdev == NULL)
return;
mgag200_cursor_fini(mdev);
mgag200_mm_fini(mdev);
dev->dev_private = NULL;
}
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