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/module.h> 10 #include <linux/pci.h> 11 #include <linux/vmalloc.h> 12 13 #include <drm/drm_aperture.h> 14 #include <drm/drm_drv.h> 15 #include <drm/drm_file.h> 16 #include <drm/drm_ioctl.h> 17 #include <drm/drm_pciids.h> 18 19 #include "mgag200_drv.h" 20 21 int mgag200_modeset = -1; 22 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting"); 23 module_param_named(modeset, mgag200_modeset, int, 0400); 24 25 /* 26 * DRM driver 27 */ 28 29 DEFINE_DRM_GEM_FOPS(mgag200_driver_fops); 30 31 static const struct drm_driver mgag200_driver = { 32 .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET, 33 .fops = &mgag200_driver_fops, 34 .name = DRIVER_NAME, 35 .desc = DRIVER_DESC, 36 .date = DRIVER_DATE, 37 .major = DRIVER_MAJOR, 38 .minor = DRIVER_MINOR, 39 .patchlevel = DRIVER_PATCHLEVEL, 40 DRM_GEM_SHMEM_DRIVER_OPS, 41 }; 42 43 /* 44 * DRM device 45 */ 46 47 static bool mgag200_has_sgram(struct mga_device *mdev) 48 { 49 struct drm_device *dev = &mdev->base; 50 struct pci_dev *pdev = to_pci_dev(dev->dev); 51 u32 option; 52 int ret; 53 54 ret = pci_read_config_dword(pdev, PCI_MGA_OPTION, &option); 55 if (drm_WARN(dev, ret, "failed to read PCI config dword: %d\n", ret)) 56 return false; 57 58 return !!(option & PCI_MGA_OPTION_HARDPWMSK); 59 } 60 61 static int mgag200_regs_init(struct mga_device *mdev) 62 { 63 struct drm_device *dev = &mdev->base; 64 struct pci_dev *pdev = to_pci_dev(dev->dev); 65 u32 option, option2; 66 u8 crtcext3; 67 68 switch (mdev->type) { 69 case G200_PCI: 70 case G200_AGP: 71 if (mgag200_has_sgram(mdev)) 72 option = 0x4049cd21; 73 else 74 option = 0x40499121; 75 option2 = 0x00008000; 76 break; 77 case G200_SE_A: 78 case G200_SE_B: 79 option = 0x40049120; 80 if (mgag200_has_sgram(mdev)) 81 option |= PCI_MGA_OPTION_HARDPWMSK; 82 option2 = 0x00008000; 83 break; 84 case G200_WB: 85 case G200_EW3: 86 option = 0x41049120; 87 option2 = 0x0000b000; 88 break; 89 case G200_EV: 90 option = 0x00000120; 91 option2 = 0x0000b000; 92 break; 93 case G200_EH: 94 case G200_EH3: 95 option = 0x00000120; 96 option2 = 0x0000b000; 97 break; 98 default: 99 option = 0; 100 option2 = 0; 101 } 102 103 if (option) 104 pci_write_config_dword(pdev, PCI_MGA_OPTION, option); 105 if (option2) 106 pci_write_config_dword(pdev, PCI_MGA_OPTION2, option2); 107 108 /* BAR 1 contains registers */ 109 mdev->rmmio_base = pci_resource_start(pdev, 1); 110 mdev->rmmio_size = pci_resource_len(pdev, 1); 111 112 if (!devm_request_mem_region(dev->dev, mdev->rmmio_base, 113 mdev->rmmio_size, "mgadrmfb_mmio")) { 114 drm_err(dev, "can't reserve mmio registers\n"); 115 return -ENOMEM; 116 } 117 118 mdev->rmmio = pcim_iomap(pdev, 1, 0); 119 if (mdev->rmmio == NULL) 120 return -ENOMEM; 121 122 RREG_ECRT(0x03, crtcext3); 123 crtcext3 |= MGAREG_CRTCEXT3_MGAMODE; 124 WREG_ECRT(0x03, crtcext3); 125 126 return 0; 127 } 128 129 static void mgag200_g200_interpret_bios(struct mga_device *mdev, 130 const unsigned char *bios, 131 size_t size) 132 { 133 static const char matrox[] = {'M', 'A', 'T', 'R', 'O', 'X'}; 134 static const unsigned int expected_length[6] = { 135 0, 64, 64, 64, 128, 128 136 }; 137 struct drm_device *dev = &mdev->base; 138 const unsigned char *pins; 139 unsigned int pins_len, version; 140 int offset; 141 int tmp; 142 143 /* Test for MATROX string. */ 144 if (size < 45 + sizeof(matrox)) 145 return; 146 if (memcmp(&bios[45], matrox, sizeof(matrox)) != 0) 147 return; 148 149 /* Get the PInS offset. */ 150 if (size < MGA_BIOS_OFFSET + 2) 151 return; 152 offset = (bios[MGA_BIOS_OFFSET + 1] << 8) | bios[MGA_BIOS_OFFSET]; 153 154 /* Get PInS data structure. */ 155 156 if (size < offset + 6) 157 return; 158 pins = bios + offset; 159 if (pins[0] == 0x2e && pins[1] == 0x41) { 160 version = pins[5]; 161 pins_len = pins[2]; 162 } else { 163 version = 1; 164 pins_len = pins[0] + (pins[1] << 8); 165 } 166 167 if (version < 1 || version > 5) { 168 drm_warn(dev, "Unknown BIOS PInS version: %d\n", version); 169 return; 170 } 171 if (pins_len != expected_length[version]) { 172 drm_warn(dev, "Unexpected BIOS PInS size: %d expected: %d\n", 173 pins_len, expected_length[version]); 174 return; 175 } 176 if (size < offset + pins_len) 177 return; 178 179 drm_dbg_kms(dev, "MATROX BIOS PInS version %d size: %d found\n", 180 version, pins_len); 181 182 /* Extract the clock values */ 183 184 switch (version) { 185 case 1: 186 tmp = pins[24] + (pins[25] << 8); 187 if (tmp) 188 mdev->model.g200.pclk_max = tmp * 10; 189 break; 190 case 2: 191 if (pins[41] != 0xff) 192 mdev->model.g200.pclk_max = (pins[41] + 100) * 1000; 193 break; 194 case 3: 195 if (pins[36] != 0xff) 196 mdev->model.g200.pclk_max = (pins[36] + 100) * 1000; 197 if (pins[52] & 0x20) 198 mdev->model.g200.ref_clk = 14318; 199 break; 200 case 4: 201 if (pins[39] != 0xff) 202 mdev->model.g200.pclk_max = pins[39] * 4 * 1000; 203 if (pins[92] & 0x01) 204 mdev->model.g200.ref_clk = 14318; 205 break; 206 case 5: 207 tmp = pins[4] ? 8000 : 6000; 208 if (pins[123] != 0xff) 209 mdev->model.g200.pclk_min = pins[123] * tmp; 210 if (pins[38] != 0xff) 211 mdev->model.g200.pclk_max = pins[38] * tmp; 212 if (pins[110] & 0x01) 213 mdev->model.g200.ref_clk = 14318; 214 break; 215 default: 216 break; 217 } 218 } 219 220 static void mgag200_g200_init_refclk(struct mga_device *mdev) 221 { 222 struct drm_device *dev = &mdev->base; 223 struct pci_dev *pdev = to_pci_dev(dev->dev); 224 unsigned char __iomem *rom; 225 unsigned char *bios; 226 size_t size; 227 228 mdev->model.g200.pclk_min = 50000; 229 mdev->model.g200.pclk_max = 230000; 230 mdev->model.g200.ref_clk = 27050; 231 232 rom = pci_map_rom(pdev, &size); 233 if (!rom) 234 return; 235 236 bios = vmalloc(size); 237 if (!bios) 238 goto out; 239 memcpy_fromio(bios, rom, size); 240 241 if (size != 0 && bios[0] == 0x55 && bios[1] == 0xaa) 242 mgag200_g200_interpret_bios(mdev, bios, size); 243 244 drm_dbg_kms(dev, "pclk_min: %ld pclk_max: %ld ref_clk: %ld\n", 245 mdev->model.g200.pclk_min, mdev->model.g200.pclk_max, 246 mdev->model.g200.ref_clk); 247 248 vfree(bios); 249 out: 250 pci_unmap_rom(pdev, rom); 251 } 252 253 static void mgag200_g200se_init_unique_id(struct mga_device *mdev) 254 { 255 struct drm_device *dev = &mdev->base; 256 257 /* stash G200 SE model number for later use */ 258 mdev->model.g200se.unique_rev_id = RREG32(0x1e24); 259 260 drm_dbg(dev, "G200 SE unique revision id is 0x%x\n", 261 mdev->model.g200se.unique_rev_id); 262 } 263 264 static struct mga_device * 265 mgag200_device_create(struct pci_dev *pdev, enum mga_type type, unsigned long flags) 266 { 267 struct mga_device *mdev; 268 struct drm_device *dev; 269 int ret; 270 271 mdev = devm_drm_dev_alloc(&pdev->dev, &mgag200_driver, struct mga_device, base); 272 if (IS_ERR(mdev)) 273 return mdev; 274 dev = &mdev->base; 275 276 pci_set_drvdata(pdev, dev); 277 278 mdev->flags = flags; 279 mdev->type = type; 280 281 ret = mgag200_regs_init(mdev); 282 if (ret) 283 return ERR_PTR(ret); 284 285 if (mdev->type == G200_PCI || mdev->type == G200_AGP) 286 mgag200_g200_init_refclk(mdev); 287 else if (IS_G200_SE(mdev)) 288 mgag200_g200se_init_unique_id(mdev); 289 290 ret = mgag200_mm_init(mdev); 291 if (ret) 292 return ERR_PTR(ret); 293 294 ret = mgag200_modeset_init(mdev); 295 if (ret) 296 return ERR_PTR(ret); 297 298 return mdev; 299 } 300 301 /* 302 * PCI driver 303 */ 304 305 static const struct pci_device_id mgag200_pciidlist[] = { 306 { PCI_VENDOR_ID_MATROX, 0x520, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_PCI }, 307 { PCI_VENDOR_ID_MATROX, 0x521, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_AGP }, 308 { PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 309 G200_SE_A | MGAG200_FLAG_HW_BUG_NO_STARTADD}, 310 { PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B }, 311 { PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV }, 312 { PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB }, 313 { PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH }, 314 { PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER }, 315 { PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 }, 316 { PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 }, 317 {0,} 318 }; 319 320 MODULE_DEVICE_TABLE(pci, mgag200_pciidlist); 321 322 static enum mga_type mgag200_type_from_driver_data(kernel_ulong_t driver_data) 323 { 324 return (enum mga_type)(driver_data & MGAG200_TYPE_MASK); 325 } 326 327 static unsigned long mgag200_flags_from_driver_data(kernel_ulong_t driver_data) 328 { 329 return driver_data & MGAG200_FLAG_MASK; 330 } 331 332 static int 333 mgag200_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 334 { 335 kernel_ulong_t driver_data = ent->driver_data; 336 enum mga_type type = mgag200_type_from_driver_data(driver_data); 337 unsigned long flags = mgag200_flags_from_driver_data(driver_data); 338 struct mga_device *mdev; 339 struct drm_device *dev; 340 int ret; 341 342 ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &mgag200_driver); 343 if (ret) 344 return ret; 345 346 ret = pcim_enable_device(pdev); 347 if (ret) 348 return ret; 349 350 mdev = mgag200_device_create(pdev, type, flags); 351 if (IS_ERR(mdev)) 352 return PTR_ERR(mdev); 353 dev = &mdev->base; 354 355 ret = drm_dev_register(dev, 0); 356 if (ret) 357 return ret; 358 359 drm_fbdev_generic_setup(dev, 0); 360 361 return 0; 362 } 363 364 static void mgag200_pci_remove(struct pci_dev *pdev) 365 { 366 struct drm_device *dev = pci_get_drvdata(pdev); 367 368 drm_dev_unregister(dev); 369 } 370 371 static struct pci_driver mgag200_pci_driver = { 372 .name = DRIVER_NAME, 373 .id_table = mgag200_pciidlist, 374 .probe = mgag200_pci_probe, 375 .remove = mgag200_pci_remove, 376 }; 377 378 static int __init mgag200_init(void) 379 { 380 if (drm_firmware_drivers_only() && mgag200_modeset == -1) 381 return -EINVAL; 382 383 if (mgag200_modeset == 0) 384 return -EINVAL; 385 386 return pci_register_driver(&mgag200_pci_driver); 387 } 388 389 static void __exit mgag200_exit(void) 390 { 391 pci_unregister_driver(&mgag200_pci_driver); 392 } 393 394 module_init(mgag200_init); 395 module_exit(mgag200_exit); 396 397 MODULE_AUTHOR(DRIVER_AUTHOR); 398 MODULE_DESCRIPTION(DRIVER_DESC); 399 MODULE_LICENSE("GPL"); 400