295 lines
6.9 KiB
C
295 lines
6.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2012 Red Hat
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*
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* Authors: Matthew Garrett
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* Dave Airlie
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <drm/drm_aperture.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_fbdev_generic.h>
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#include <drm/drm_file.h>
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#include <drm/drm_ioctl.h>
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#include <drm/drm_managed.h>
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#include <drm/drm_module.h>
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#include <drm/drm_pciids.h>
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#include "mgag200_drv.h"
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int mgag200_modeset = -1;
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MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
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module_param_named(modeset, mgag200_modeset, int, 0400);
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int mgag200_init_pci_options(struct pci_dev *pdev, u32 option, u32 option2)
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{
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struct device *dev = &pdev->dev;
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int err;
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err = pci_write_config_dword(pdev, PCI_MGA_OPTION, option);
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if (err != PCIBIOS_SUCCESSFUL) {
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dev_err(dev, "pci_write_config_dword(PCI_MGA_OPTION) failed: %d\n", err);
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return pcibios_err_to_errno(err);
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}
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err = pci_write_config_dword(pdev, PCI_MGA_OPTION2, option2);
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if (err != PCIBIOS_SUCCESSFUL) {
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dev_err(dev, "pci_write_config_dword(PCI_MGA_OPTION2) failed: %d\n", err);
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return pcibios_err_to_errno(err);
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}
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return 0;
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}
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resource_size_t mgag200_probe_vram(void __iomem *mem, resource_size_t size)
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{
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int offset;
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int orig;
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int test1, test2;
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int orig1, orig2;
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size_t vram_size;
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/* Probe */
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orig = ioread16(mem);
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iowrite16(0, mem);
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vram_size = size;
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for (offset = 0x100000; offset < vram_size; offset += 0x4000) {
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orig1 = ioread8(mem + offset);
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orig2 = ioread8(mem + offset + 0x100);
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iowrite16(0xaa55, mem + offset);
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iowrite16(0xaa55, mem + offset + 0x100);
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test1 = ioread16(mem + offset);
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test2 = ioread16(mem);
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iowrite16(orig1, mem + offset);
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iowrite16(orig2, mem + offset + 0x100);
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if (test1 != 0xaa55)
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break;
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if (test2)
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break;
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}
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iowrite16(orig, mem);
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return offset - 65536;
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}
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/*
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* DRM driver
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*/
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DEFINE_DRM_GEM_FOPS(mgag200_driver_fops);
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static const struct drm_driver mgag200_driver = {
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.driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
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.fops = &mgag200_driver_fops,
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.name = DRIVER_NAME,
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.desc = DRIVER_DESC,
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.date = DRIVER_DATE,
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.major = DRIVER_MAJOR,
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.minor = DRIVER_MINOR,
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.patchlevel = DRIVER_PATCHLEVEL,
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DRM_GEM_SHMEM_DRIVER_OPS,
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};
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/*
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* DRM device
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*/
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resource_size_t mgag200_device_probe_vram(struct mga_device *mdev)
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{
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return mgag200_probe_vram(mdev->vram, resource_size(mdev->vram_res));
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}
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int mgag200_device_preinit(struct mga_device *mdev)
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{
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struct drm_device *dev = &mdev->base;
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struct pci_dev *pdev = to_pci_dev(dev->dev);
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resource_size_t start, len;
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struct resource *res;
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/* BAR 1 contains registers */
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start = pci_resource_start(pdev, 1);
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len = pci_resource_len(pdev, 1);
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res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_mmio");
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if (!res) {
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drm_err(dev, "devm_request_mem_region(MMIO) failed\n");
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return -ENXIO;
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}
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mdev->rmmio_res = res;
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mdev->rmmio = pcim_iomap(pdev, 1, 0);
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if (!mdev->rmmio)
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return -ENOMEM;
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/* BAR 0 is VRAM */
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start = pci_resource_start(pdev, 0);
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len = pci_resource_len(pdev, 0);
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res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_vram");
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if (!res) {
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drm_err(dev, "devm_request_mem_region(VRAM) failed\n");
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return -ENXIO;
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}
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mdev->vram_res = res;
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/* Don't fail on errors, but performance might be reduced. */
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devm_arch_io_reserve_memtype_wc(dev->dev, res->start, resource_size(res));
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devm_arch_phys_wc_add(dev->dev, res->start, resource_size(res));
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mdev->vram = devm_ioremap(dev->dev, res->start, resource_size(res));
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if (!mdev->vram)
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return -ENOMEM;
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return 0;
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}
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int mgag200_device_init(struct mga_device *mdev,
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const struct mgag200_device_info *info,
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const struct mgag200_device_funcs *funcs)
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{
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struct drm_device *dev = &mdev->base;
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u8 crtcext3, misc;
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int ret;
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mdev->info = info;
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mdev->funcs = funcs;
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ret = drmm_mutex_init(dev, &mdev->rmmio_lock);
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if (ret)
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return ret;
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mutex_lock(&mdev->rmmio_lock);
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RREG_ECRT(0x03, crtcext3);
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crtcext3 |= MGAREG_CRTCEXT3_MGAMODE;
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WREG_ECRT(0x03, crtcext3);
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WREG_ECRT(0x04, 0x00);
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misc = RREG8(MGA_MISC_IN);
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misc |= MGAREG_MISC_RAMMAPEN |
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MGAREG_MISC_HIGH_PG_SEL;
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WREG8(MGA_MISC_OUT, misc);
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mutex_unlock(&mdev->rmmio_lock);
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return 0;
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}
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/*
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* PCI driver
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*/
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static const struct pci_device_id mgag200_pciidlist[] = {
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{ PCI_VENDOR_ID_MATROX, 0x520, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_PCI },
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{ PCI_VENDOR_ID_MATROX, 0x521, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_AGP },
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{ PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_A },
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{ PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B },
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{ PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV },
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{ PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB },
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{ PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH },
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{ PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER },
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{ PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 },
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{ PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 },
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{0,}
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};
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MODULE_DEVICE_TABLE(pci, mgag200_pciidlist);
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static int
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mgag200_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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{
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enum mga_type type = (enum mga_type)ent->driver_data;
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struct mga_device *mdev;
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struct drm_device *dev;
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int ret;
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ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &mgag200_driver);
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if (ret)
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return ret;
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ret = pcim_enable_device(pdev);
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if (ret)
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return ret;
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switch (type) {
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case G200_PCI:
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case G200_AGP:
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mdev = mgag200_g200_device_create(pdev, &mgag200_driver);
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break;
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case G200_SE_A:
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case G200_SE_B:
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mdev = mgag200_g200se_device_create(pdev, &mgag200_driver, type);
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break;
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case G200_WB:
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mdev = mgag200_g200wb_device_create(pdev, &mgag200_driver);
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break;
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case G200_EV:
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mdev = mgag200_g200ev_device_create(pdev, &mgag200_driver);
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break;
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case G200_EH:
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mdev = mgag200_g200eh_device_create(pdev, &mgag200_driver);
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break;
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case G200_EH3:
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mdev = mgag200_g200eh3_device_create(pdev, &mgag200_driver);
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break;
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case G200_ER:
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mdev = mgag200_g200er_device_create(pdev, &mgag200_driver);
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break;
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case G200_EW3:
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mdev = mgag200_g200ew3_device_create(pdev, &mgag200_driver);
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break;
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default:
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dev_err(&pdev->dev, "Device type %d is unsupported\n", type);
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return -ENODEV;
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}
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if (IS_ERR(mdev))
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return PTR_ERR(mdev);
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dev = &mdev->base;
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ret = drm_dev_register(dev, 0);
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if (ret)
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return ret;
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/*
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* FIXME: A 24-bit color depth does not work with 24 bpp on
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* G200ER. Force 32 bpp.
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*/
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drm_fbdev_generic_setup(dev, 32);
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return 0;
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}
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static void mgag200_pci_remove(struct pci_dev *pdev)
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{
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struct drm_device *dev = pci_get_drvdata(pdev);
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drm_dev_unregister(dev);
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}
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static struct pci_driver mgag200_pci_driver = {
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.name = DRIVER_NAME,
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.id_table = mgag200_pciidlist,
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.probe = mgag200_pci_probe,
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.remove = mgag200_pci_remove,
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};
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drm_module_pci_driver_if_modeset(mgag200_pci_driver, mgag200_modeset);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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