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