// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2012 Red Hat
*
* Authors: Matthew Garrett
* Dave Airlie
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <drm/drm_aperture.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fbdev_shmem.h>
#include <drm/drm_file.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_managed.h>
#include <drm/drm_module.h>
#include <drm/drm_pciids.h>
#include <drm/drm_vblank.h>
#include "mgag200_drv.h"
static int mgag200_modeset = -1;
MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
module_param_named(modeset, mgag200_modeset, int, 0400);
int mgag200_init_pci_options(struct pci_dev *pdev, u32 option, u32 option2)
{
struct device *dev = &pdev->dev;
int err;
err = pci_write_config_dword(pdev, PCI_MGA_OPTION, option);
if (err != PCIBIOS_SUCCESSFUL) {
dev_err(dev, "pci_write_config_dword(PCI_MGA_OPTION) failed: %d\n", err);
return pcibios_err_to_errno(err);
}
err = pci_write_config_dword(pdev, PCI_MGA_OPTION2, option2);
if (err != PCIBIOS_SUCCESSFUL) {
dev_err(dev, "pci_write_config_dword(PCI_MGA_OPTION2) failed: %d\n", err);
return pcibios_err_to_errno(err);
}
return 0;
}
resource_size_t mgag200_probe_vram(void __iomem *mem, resource_size_t size)
{
int offset;
int orig;
int test1, test2;
int orig1, orig2;
size_t vram_size;
/* Probe */
orig = ioread16(mem);
iowrite16(0, mem);
vram_size = size;
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;
}
static irqreturn_t mgag200_irq_handler(int irq, void *arg)
{
struct drm_device *dev = arg;
struct mga_device *mdev = to_mga_device(dev);
struct drm_crtc *crtc;
u32 status, ien;
status = RREG32(MGAREG_STATUS);
if (status & MGAREG_STATUS_VLINEPEN) {
ien = RREG32(MGAREG_IEN);
if (!(ien & MGAREG_IEN_VLINEIEN))
goto out;
crtc = drm_crtc_from_index(dev, 0);
if (WARN_ON_ONCE(!crtc))
goto out;
drm_crtc_handle_vblank(crtc);
WREG32(MGAREG_ICLEAR, MGAREG_ICLEAR_VLINEICLR);
return IRQ_HANDLED;
}
out:
return IRQ_NONE;
}
/*
* DRM driver
*/
DEFINE_DRM_GEM_FOPS(mgag200_driver_fops);
static const struct drm_driver mgag200_driver = {
.driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
.fops = &mgag200_driver_fops,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
.patchlevel = DRIVER_PATCHLEVEL,
DRM_GEM_SHMEM_DRIVER_OPS,
};
/*
* DRM device
*/
resource_size_t mgag200_device_probe_vram(struct mga_device *mdev)
{
return mgag200_probe_vram(mdev->vram, resource_size(mdev->vram_res));
}
int mgag200_device_preinit(struct mga_device *mdev)
{
struct drm_device *dev = &mdev->base;
struct pci_dev *pdev = to_pci_dev(dev->dev);
resource_size_t start, len;
struct resource *res;
/* BAR 1 contains registers */
start = pci_resource_start(pdev, 1);
len = pci_resource_len(pdev, 1);
res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_mmio");
if (!res) {
drm_err(dev, "devm_request_mem_region(MMIO) failed\n");
return -ENXIO;
}
mdev->rmmio_res = res;
mdev->rmmio = pcim_iomap(pdev, 1, 0);
if (!mdev->rmmio)
return -ENOMEM;
/* BAR 0 is VRAM */
start = pci_resource_start(pdev, 0);
len = pci_resource_len(pdev, 0);
res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_vram");
if (!res) {
drm_err(dev, "devm_request_mem_region(VRAM) failed\n");
return -ENXIO;
}
mdev->vram_res = res;
#if defined(CONFIG_DRM_MGAG200_DISABLE_WRITECOMBINE)
mdev->vram = devm_ioremap(dev->dev, res->start, resource_size(res));
if (!mdev->vram)
return -ENOMEM;
#else
mdev->vram = devm_ioremap_wc(dev->dev, res->start, resource_size(res));
if (!mdev->vram)
return -ENOMEM;
/* Don't fail on errors, but performance might be reduced. */
devm_arch_phys_wc_add(dev->dev, res->start, resource_size(res));
#endif
return 0;
}
int mgag200_device_init(struct mga_device *mdev,
const struct mgag200_device_info *info,
const struct mgag200_device_funcs *funcs)
{
struct drm_device *dev = &mdev->base;
struct pci_dev *pdev = to_pci_dev(dev->dev);
u8 crtcext3, misc;
int ret;
mdev->info = info;
mdev->funcs = funcs;
ret = drmm_mutex_init(dev, &mdev->rmmio_lock);
if (ret)
return ret;
mutex_lock(&mdev->rmmio_lock);
RREG_ECRT(0x03, crtcext3);
crtcext3 |= MGAREG_CRTCEXT3_MGAMODE;
WREG_ECRT(0x03, crtcext3);
WREG_ECRT(0x04, 0x00);
misc = RREG8(MGA_MISC_IN);
misc |= MGAREG_MISC_RAMMAPEN |
MGAREG_MISC_HIGH_PG_SEL;
WREG8(MGA_MISC_OUT, misc);
mutex_unlock(&mdev->rmmio_lock);
WREG32(MGAREG_IEN, 0);
WREG32(MGAREG_ICLEAR, MGAREG_ICLEAR_VLINEICLR);
ret = devm_request_irq(&pdev->dev, pdev->irq, mgag200_irq_handler, IRQF_SHARED,
dev->driver->name, dev);
if (ret) {
drm_err(dev, "Failed to acquire interrupt, error %d\n", ret);
return ret;
}
return 0;
}
/*
* PCI driver
*/
static const struct pci_device_id mgag200_pciidlist[] = {
{ PCI_VENDOR_ID_MATROX, 0x520, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_PCI },
{ PCI_VENDOR_ID_MATROX, 0x521, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_AGP },
{ PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_A },
{ PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B },
{ PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV },
{ PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB },
{ PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH },
{ PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER },
{ PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 },
{ PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 },
{0,}
};
MODULE_DEVICE_TABLE(pci, mgag200_pciidlist);
static int
mgag200_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
enum mga_type type = (enum mga_type)ent->driver_data;
struct mga_device *mdev;
struct drm_device *dev;
int ret;
ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &mgag200_driver);
if (ret)
return ret;
ret = pcim_enable_device(pdev);
if (ret)
return ret;
switch (type) {
case G200_PCI:
case G200_AGP:
mdev = mgag200_g200_device_create(pdev, &mgag200_driver);
break;
case G200_SE_A:
case G200_SE_B:
mdev = mgag200_g200se_device_create(pdev, &mgag200_driver, type);
break;
case G200_WB:
mdev = mgag200_g200wb_device_create(pdev, &mgag200_driver);
break;
case G200_EV:
mdev = mgag200_g200ev_device_create(pdev, &mgag200_driver);
break;
case G200_EH:
mdev = mgag200_g200eh_device_create(pdev, &mgag200_driver);
break;
case G200_EH3:
mdev = mgag200_g200eh3_device_create(pdev, &mgag200_driver);
break;
case G200_ER:
mdev = mgag200_g200er_device_create(pdev, &mgag200_driver);
break;
case G200_EW3:
mdev = mgag200_g200ew3_device_create(pdev, &mgag200_driver);
break;
default:
dev_err(&pdev->dev, "Device type %d is unsupported\n", type);
return -ENODEV;
}
if (IS_ERR(mdev))
return PTR_ERR(mdev);
dev = &mdev->base;
ret = drm_dev_register(dev, 0);
if (ret)
return ret;
/*
* FIXME: A 24-bit color depth does not work with 24 bpp on
* G200ER. Force 32 bpp.
*/
drm_fbdev_shmem_setup(dev, 32);
return 0;
}
static void mgag200_pci_remove(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
drm_dev_unregister(dev);
drm_atomic_helper_shutdown(dev);
}
static void mgag200_pci_shutdown(struct pci_dev *pdev)
{
drm_atomic_helper_shutdown(pci_get_drvdata(pdev));
}
static struct pci_driver mgag200_pci_driver = {
.name = DRIVER_NAME,
.id_table = mgag200_pciidlist,
.probe = mgag200_pci_probe,
.remove = mgag200_pci_remove,
.shutdown = mgag200_pci_shutdown,
};
drm_module_pci_driver_if_modeset(mgag200_pci_driver, mgag200_modeset);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
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