1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2012 Red Hat 4 * 5 * Authors: Matthew Garrett 6 * Dave Airlie 7 */ 8 9 #include <linux/aperture.h> 10 #include <linux/module.h> 11 #include <linux/pci.h> 12 13 #include <drm/drm_atomic_helper.h> 14 #include <drm/drm_client_setup.h> 15 #include <drm/drm_drv.h> 16 #include <drm/drm_fbdev_shmem.h> 17 #include <drm/drm_file.h> 18 #include <drm/drm_fourcc.h> 19 #include <drm/drm_ioctl.h> 20 #include <drm/drm_managed.h> 21 #include <drm/drm_module.h> 22 #include <drm/drm_pciids.h> 23 24 #include "mgag200_drv.h" 25 26 static int mgag200_modeset = -1; 27 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting"); 28 module_param_named(modeset, mgag200_modeset, int, 0400); 29 30 int mgag200_init_pci_options(struct pci_dev *pdev, u32 option, u32 option2) 31 { 32 struct device *dev = &pdev->dev; 33 int err; 34 35 err = pci_write_config_dword(pdev, PCI_MGA_OPTION, option); 36 if (err != PCIBIOS_SUCCESSFUL) { 37 dev_err(dev, "pci_write_config_dword(PCI_MGA_OPTION) failed: %d\n", err); 38 return pcibios_err_to_errno(err); 39 } 40 41 err = pci_write_config_dword(pdev, PCI_MGA_OPTION2, option2); 42 if (err != PCIBIOS_SUCCESSFUL) { 43 dev_err(dev, "pci_write_config_dword(PCI_MGA_OPTION2) failed: %d\n", err); 44 return pcibios_err_to_errno(err); 45 } 46 47 return 0; 48 } 49 50 resource_size_t mgag200_probe_vram(void __iomem *mem, resource_size_t size) 51 { 52 int offset; 53 int orig; 54 int test1, test2; 55 int orig1, orig2; 56 size_t vram_size; 57 58 /* Probe */ 59 orig = ioread16(mem); 60 iowrite16(0, mem); 61 62 vram_size = size; 63 64 for (offset = 0x100000; offset < vram_size; offset += 0x4000) { 65 orig1 = ioread8(mem + offset); 66 orig2 = ioread8(mem + offset + 0x100); 67 68 iowrite16(0xaa55, mem + offset); 69 iowrite16(0xaa55, mem + offset + 0x100); 70 71 test1 = ioread16(mem + offset); 72 test2 = ioread16(mem); 73 74 iowrite16(orig1, mem + offset); 75 iowrite16(orig2, mem + offset + 0x100); 76 77 if (test1 != 0xaa55) 78 break; 79 80 if (test2) 81 break; 82 } 83 84 iowrite16(orig, mem); 85 86 return offset - 65536; 87 } 88 89 /* 90 * DRM driver 91 */ 92 93 DEFINE_DRM_GEM_FOPS(mgag200_driver_fops); 94 95 static const struct drm_driver mgag200_driver = { 96 .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET, 97 .fops = &mgag200_driver_fops, 98 .name = DRIVER_NAME, 99 .desc = DRIVER_DESC, 100 .date = DRIVER_DATE, 101 .major = DRIVER_MAJOR, 102 .minor = DRIVER_MINOR, 103 .patchlevel = DRIVER_PATCHLEVEL, 104 DRM_GEM_SHMEM_DRIVER_OPS, 105 DRM_FBDEV_SHMEM_DRIVER_OPS, 106 }; 107 108 /* 109 * DRM device 110 */ 111 112 resource_size_t mgag200_device_probe_vram(struct mga_device *mdev) 113 { 114 return mgag200_probe_vram(mdev->vram, resource_size(mdev->vram_res)); 115 } 116 117 int mgag200_device_preinit(struct mga_device *mdev) 118 { 119 struct drm_device *dev = &mdev->base; 120 struct pci_dev *pdev = to_pci_dev(dev->dev); 121 resource_size_t start, len; 122 struct resource *res; 123 124 /* BAR 1 contains registers */ 125 126 start = pci_resource_start(pdev, 1); 127 len = pci_resource_len(pdev, 1); 128 129 res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_mmio"); 130 if (!res) { 131 drm_err(dev, "devm_request_mem_region(MMIO) failed\n"); 132 return -ENXIO; 133 } 134 mdev->rmmio_res = res; 135 136 mdev->rmmio = pcim_iomap(pdev, 1, 0); 137 if (!mdev->rmmio) 138 return -ENOMEM; 139 140 /* BAR 0 is VRAM */ 141 142 start = pci_resource_start(pdev, 0); 143 len = pci_resource_len(pdev, 0); 144 145 res = devm_request_mem_region(dev->dev, start, len, "mgadrmfb_vram"); 146 if (!res) { 147 drm_err(dev, "devm_request_mem_region(VRAM) failed\n"); 148 return -ENXIO; 149 } 150 mdev->vram_res = res; 151 152 #if defined(CONFIG_DRM_MGAG200_DISABLE_WRITECOMBINE) 153 mdev->vram = devm_ioremap(dev->dev, res->start, resource_size(res)); 154 if (!mdev->vram) 155 return -ENOMEM; 156 #else 157 mdev->vram = devm_ioremap_wc(dev->dev, res->start, resource_size(res)); 158 if (!mdev->vram) 159 return -ENOMEM; 160 161 /* Don't fail on errors, but performance might be reduced. */ 162 devm_arch_phys_wc_add(dev->dev, res->start, resource_size(res)); 163 #endif 164 165 return 0; 166 } 167 168 int mgag200_device_init(struct mga_device *mdev, 169 const struct mgag200_device_info *info, 170 const struct mgag200_device_funcs *funcs) 171 { 172 struct drm_device *dev = &mdev->base; 173 u8 crtcext3, misc; 174 int ret; 175 176 mdev->info = info; 177 mdev->funcs = funcs; 178 179 ret = drmm_mutex_init(dev, &mdev->rmmio_lock); 180 if (ret) 181 return ret; 182 183 mutex_lock(&mdev->rmmio_lock); 184 185 RREG_ECRT(0x03, crtcext3); 186 crtcext3 |= MGAREG_CRTCEXT3_MGAMODE; 187 WREG_ECRT(0x03, crtcext3); 188 189 WREG_ECRT(0x04, 0x00); 190 191 misc = RREG8(MGA_MISC_IN); 192 misc |= MGAREG_MISC_RAMMAPEN | 193 MGAREG_MISC_HIGH_PG_SEL; 194 WREG8(MGA_MISC_OUT, misc); 195 196 mutex_unlock(&mdev->rmmio_lock); 197 198 WREG32(MGAREG_IEN, 0); 199 200 return 0; 201 } 202 203 /* 204 * PCI driver 205 */ 206 207 static const struct pci_device_id mgag200_pciidlist[] = { 208 { PCI_VENDOR_ID_MATROX, 0x520, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_PCI }, 209 { PCI_VENDOR_ID_MATROX, 0x521, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_AGP }, 210 { PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_A }, 211 { PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B }, 212 { PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV }, 213 { PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB }, 214 { PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH }, 215 { PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER }, 216 { PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 }, 217 { PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 }, 218 {0,} 219 }; 220 221 MODULE_DEVICE_TABLE(pci, mgag200_pciidlist); 222 223 static int 224 mgag200_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 225 { 226 enum mga_type type = (enum mga_type)ent->driver_data; 227 struct mga_device *mdev; 228 struct drm_device *dev; 229 int ret; 230 231 ret = aperture_remove_conflicting_pci_devices(pdev, mgag200_driver.name); 232 if (ret) 233 return ret; 234 235 ret = pcim_enable_device(pdev); 236 if (ret) 237 return ret; 238 239 switch (type) { 240 case G200_PCI: 241 case G200_AGP: 242 mdev = mgag200_g200_device_create(pdev, &mgag200_driver); 243 break; 244 case G200_SE_A: 245 case G200_SE_B: 246 mdev = mgag200_g200se_device_create(pdev, &mgag200_driver, type); 247 break; 248 case G200_WB: 249 mdev = mgag200_g200wb_device_create(pdev, &mgag200_driver); 250 break; 251 case G200_EV: 252 mdev = mgag200_g200ev_device_create(pdev, &mgag200_driver); 253 break; 254 case G200_EH: 255 mdev = mgag200_g200eh_device_create(pdev, &mgag200_driver); 256 break; 257 case G200_EH3: 258 mdev = mgag200_g200eh3_device_create(pdev, &mgag200_driver); 259 break; 260 case G200_ER: 261 mdev = mgag200_g200er_device_create(pdev, &mgag200_driver); 262 break; 263 case G200_EW3: 264 mdev = mgag200_g200ew3_device_create(pdev, &mgag200_driver); 265 break; 266 default: 267 dev_err(&pdev->dev, "Device type %d is unsupported\n", type); 268 return -ENODEV; 269 } 270 if (IS_ERR(mdev)) 271 return PTR_ERR(mdev); 272 dev = &mdev->base; 273 274 ret = drm_dev_register(dev, 0); 275 if (ret) 276 return ret; 277 278 /* 279 * FIXME: A 24-bit color depth does not work with 24 bpp on 280 * G200ER. Force 32 bpp. 281 */ 282 drm_client_setup_with_fourcc(dev, DRM_FORMAT_XRGB8888); 283 284 return 0; 285 } 286 287 static void mgag200_pci_remove(struct pci_dev *pdev) 288 { 289 struct drm_device *dev = pci_get_drvdata(pdev); 290 291 drm_dev_unregister(dev); 292 drm_atomic_helper_shutdown(dev); 293 } 294 295 static void mgag200_pci_shutdown(struct pci_dev *pdev) 296 { 297 drm_atomic_helper_shutdown(pci_get_drvdata(pdev)); 298 } 299 300 static struct pci_driver mgag200_pci_driver = { 301 .name = DRIVER_NAME, 302 .id_table = mgag200_pciidlist, 303 .probe = mgag200_pci_probe, 304 .remove = mgag200_pci_remove, 305 .shutdown = mgag200_pci_shutdown, 306 }; 307 308 drm_module_pci_driver_if_modeset(mgag200_pci_driver, mgag200_modeset); 309 310 MODULE_AUTHOR(DRIVER_AUTHOR); 311 MODULE_DESCRIPTION(DRIVER_DESC); 312 MODULE_LICENSE("GPL"); 313