| // 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 <drm/drm_crtc_helper.h> |
| #include <drm/drm_gem_framebuffer_helper.h> |
| |
| #include "mgag200_drv.h" |
| |
| static const struct drm_mode_config_funcs mga_mode_funcs = { |
| .fb_create = drm_gem_fb_create |
| }; |
| |
| 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) |
| { |
| void __iomem *mem; |
| |
| /* BAR 0 is VRAM */ |
| mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0); |
| mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0); |
| |
| if (!devm_request_mem_region(mdev->dev->dev, mdev->mc.vram_base, mdev->mc.vram_window, |
| "mgadrmfb_vram")) { |
| DRM_ERROR("can't reserve VRAM\n"); |
| return -ENXIO; |
| } |
| |
| mem = pci_iomap(mdev->dev->pdev, 0, 0); |
| if (!mem) |
| return -ENOMEM; |
| |
| mdev->mc.vram_size = mga_probe_vram(mdev, mem); |
| |
| pci_iounmap(mdev->dev->pdev, mem); |
| |
| return 0; |
| } |
| |
| static int mgag200_device_init(struct drm_device *dev, |
| uint32_t flags) |
| { |
| struct mga_device *mdev = dev->dev_private; |
| int ret, option; |
| |
| mdev->flags = mgag200_flags_from_driver_data(flags); |
| mdev->type = mgag200_type_from_driver_data(flags); |
| |
| /* Hardcode the number of CRTCs to 1 */ |
| mdev->num_crtc = 1; |
| |
| 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(mdev->dev->pdev, 1); |
| mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1); |
| |
| if (!devm_request_mem_region(mdev->dev->dev, mdev->rmmio_base, mdev->rmmio_size, |
| "mgadrmfb_mmio")) { |
| DRM_ERROR("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_DEBUG("G200 SE unique revision id is 0x%x\n", |
| mdev->unique_rev_id); |
| } |
| |
| ret = mga_vram_init(mdev); |
| if (ret) |
| return ret; |
| |
| mdev->bpp_shifts[0] = 0; |
| mdev->bpp_shifts[1] = 1; |
| mdev->bpp_shifts[2] = 0; |
| mdev->bpp_shifts[3] = 2; |
| return 0; |
| } |
| |
| /* |
| * Functions here will be called by the core once it's bound the driver to |
| * a PCI device |
| */ |
| |
| |
| int mgag200_driver_load(struct drm_device *dev, unsigned long flags) |
| { |
| struct mga_device *mdev; |
| int r; |
| |
| mdev = devm_kzalloc(dev->dev, sizeof(struct mga_device), GFP_KERNEL); |
| if (mdev == NULL) |
| return -ENOMEM; |
| dev->dev_private = (void *)mdev; |
| mdev->dev = dev; |
| |
| r = mgag200_device_init(dev, flags); |
| if (r) { |
| dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r); |
| return r; |
| } |
| r = mgag200_mm_init(mdev); |
| if (r) |
| goto err_mm; |
| |
| drm_mode_config_init(dev); |
| dev->mode_config.funcs = (void *)&mga_mode_funcs; |
| if (IS_G200_SE(mdev) && mdev->vram_fb_available < (2048*1024)) |
| dev->mode_config.preferred_depth = 16; |
| else |
| dev->mode_config.preferred_depth = 32; |
| dev->mode_config.prefer_shadow = 1; |
| |
| r = mgag200_modeset_init(mdev); |
| if (r) { |
| dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r); |
| goto err_modeset; |
| } |
| |
| r = mgag200_cursor_init(mdev); |
| if (r) |
| dev_warn(&dev->pdev->dev, |
| "Could not initialize cursors. Not doing hardware cursors.\n"); |
| |
| r = drm_fbdev_generic_setup(mdev->dev, 0); |
| if (r) |
| goto err_modeset; |
| |
| return 0; |
| |
| err_modeset: |
| drm_mode_config_cleanup(dev); |
| mgag200_cursor_fini(mdev); |
| mgag200_mm_fini(mdev); |
| err_mm: |
| dev->dev_private = NULL; |
| |
| return r; |
| } |
| |
| void mgag200_driver_unload(struct drm_device *dev) |
| { |
| struct mga_device *mdev = dev->dev_private; |
| |
| if (mdev == NULL) |
| return; |
| mgag200_modeset_fini(mdev); |
| drm_mode_config_cleanup(dev); |
| mgag200_cursor_fini(mdev); |
| mgag200_mm_fini(mdev); |
| dev->dev_private = NULL; |
| } |