1 /* sunxvr500.c: Sun 3DLABS XVR-500 Expert3D fb driver for sparc64 systems 2 * 3 * License: GPL 4 * 5 * Copyright (C) 2007 David S. Miller (davem@davemloft.net) 6 */ 7 8 #include <linux/aperture.h> 9 #include <linux/kernel.h> 10 #include <linux/fb.h> 11 #include <linux/pci.h> 12 #include <linux/init.h> 13 #include <linux/of_device.h> 14 15 #include <asm/io.h> 16 17 /* XXX This device has a 'dev-comm' property which apparently is 18 * XXX a pointer into the openfirmware's address space which is 19 * XXX a shared area the kernel driver can use to keep OBP 20 * XXX informed about the current resolution setting. The idea 21 * XXX is that the kernel can change resolutions, and as long 22 * XXX as the values in the 'dev-comm' area are accurate then 23 * XXX OBP can still render text properly to the console. 24 * XXX 25 * XXX I'm still working out the layout of this and whether there 26 * XXX are any signatures we need to look for etc. 27 */ 28 struct e3d_info { 29 struct fb_info *info; 30 struct pci_dev *pdev; 31 32 spinlock_t lock; 33 34 char __iomem *fb_base; 35 unsigned long fb_base_phys; 36 37 unsigned long fb8_buf_diff; 38 unsigned long regs_base_phys; 39 40 void __iomem *ramdac; 41 42 struct device_node *of_node; 43 44 unsigned int width; 45 unsigned int height; 46 unsigned int depth; 47 unsigned int fb_size; 48 49 u32 fb_base_reg; 50 u32 fb8_0_off; 51 u32 fb8_1_off; 52 53 u32 pseudo_palette[16]; 54 }; 55 56 static int e3d_get_props(struct e3d_info *ep) 57 { 58 ep->width = of_getintprop_default(ep->of_node, "width", 0); 59 ep->height = of_getintprop_default(ep->of_node, "height", 0); 60 ep->depth = of_getintprop_default(ep->of_node, "depth", 8); 61 62 if (!ep->width || !ep->height) { 63 printk(KERN_ERR "e3d: Critical properties missing for %s\n", 64 pci_name(ep->pdev)); 65 return -EINVAL; 66 } 67 68 return 0; 69 } 70 71 /* My XVR-500 comes up, at 1280x768 and a FB base register value of 72 * 0x04000000, the following video layout register values: 73 * 74 * RAMDAC_VID_WH 0x03ff04ff 75 * RAMDAC_VID_CFG 0x1a0b0088 76 * RAMDAC_VID_32FB_0 0x04000000 77 * RAMDAC_VID_32FB_1 0x04800000 78 * RAMDAC_VID_8FB_0 0x05000000 79 * RAMDAC_VID_8FB_1 0x05200000 80 * RAMDAC_VID_XXXFB 0x05400000 81 * RAMDAC_VID_YYYFB 0x05c00000 82 * RAMDAC_VID_ZZZFB 0x05e00000 83 */ 84 /* Video layout registers */ 85 #define RAMDAC_VID_WH 0x00000070UL /* (height-1)<<16 | (width-1) */ 86 #define RAMDAC_VID_CFG 0x00000074UL /* 0x1a000088|(linesz_log2<<16) */ 87 #define RAMDAC_VID_32FB_0 0x00000078UL /* PCI base 32bpp FB buffer 0 */ 88 #define RAMDAC_VID_32FB_1 0x0000007cUL /* PCI base 32bpp FB buffer 1 */ 89 #define RAMDAC_VID_8FB_0 0x00000080UL /* PCI base 8bpp FB buffer 0 */ 90 #define RAMDAC_VID_8FB_1 0x00000084UL /* PCI base 8bpp FB buffer 1 */ 91 #define RAMDAC_VID_XXXFB 0x00000088UL /* PCI base of XXX FB */ 92 #define RAMDAC_VID_YYYFB 0x0000008cUL /* PCI base of YYY FB */ 93 #define RAMDAC_VID_ZZZFB 0x00000090UL /* PCI base of ZZZ FB */ 94 95 /* CLUT registers */ 96 #define RAMDAC_INDEX 0x000000bcUL 97 #define RAMDAC_DATA 0x000000c0UL 98 99 static void e3d_clut_write(struct e3d_info *ep, int index, u32 val) 100 { 101 void __iomem *ramdac = ep->ramdac; 102 unsigned long flags; 103 104 spin_lock_irqsave(&ep->lock, flags); 105 106 writel(index, ramdac + RAMDAC_INDEX); 107 writel(val, ramdac + RAMDAC_DATA); 108 109 spin_unlock_irqrestore(&ep->lock, flags); 110 } 111 112 static int e3d_setcolreg(unsigned regno, 113 unsigned red, unsigned green, unsigned blue, 114 unsigned transp, struct fb_info *info) 115 { 116 struct e3d_info *ep = info->par; 117 u32 red_8, green_8, blue_8; 118 u32 red_10, green_10, blue_10; 119 u32 value; 120 121 if (regno >= 256) 122 return 1; 123 124 red_8 = red >> 8; 125 green_8 = green >> 8; 126 blue_8 = blue >> 8; 127 128 value = (blue_8 << 24) | (green_8 << 16) | (red_8 << 8); 129 130 if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 16) 131 ((u32 *)info->pseudo_palette)[regno] = value; 132 133 134 red_10 = red >> 6; 135 green_10 = green >> 6; 136 blue_10 = blue >> 6; 137 138 value = (blue_10 << 20) | (green_10 << 10) | (red_10 << 0); 139 e3d_clut_write(ep, regno, value); 140 141 return 0; 142 } 143 144 /* XXX This is a bit of a hack. I can't figure out exactly how the 145 * XXX two 8bpp areas of the framebuffer work. I imagine there is 146 * XXX a WID attribute somewhere else in the framebuffer which tells 147 * XXX the ramdac which of the two 8bpp framebuffer regions to take 148 * XXX the pixel from. So, for now, render into both regions to make 149 * XXX sure the pixel shows up. 150 */ 151 static void e3d_imageblit(struct fb_info *info, const struct fb_image *image) 152 { 153 struct e3d_info *ep = info->par; 154 unsigned long flags; 155 156 spin_lock_irqsave(&ep->lock, flags); 157 cfb_imageblit(info, image); 158 info->screen_base += ep->fb8_buf_diff; 159 cfb_imageblit(info, image); 160 info->screen_base -= ep->fb8_buf_diff; 161 spin_unlock_irqrestore(&ep->lock, flags); 162 } 163 164 static void e3d_fillrect(struct fb_info *info, const struct fb_fillrect *rect) 165 { 166 struct e3d_info *ep = info->par; 167 unsigned long flags; 168 169 spin_lock_irqsave(&ep->lock, flags); 170 cfb_fillrect(info, rect); 171 info->screen_base += ep->fb8_buf_diff; 172 cfb_fillrect(info, rect); 173 info->screen_base -= ep->fb8_buf_diff; 174 spin_unlock_irqrestore(&ep->lock, flags); 175 } 176 177 static void e3d_copyarea(struct fb_info *info, const struct fb_copyarea *area) 178 { 179 struct e3d_info *ep = info->par; 180 unsigned long flags; 181 182 spin_lock_irqsave(&ep->lock, flags); 183 cfb_copyarea(info, area); 184 info->screen_base += ep->fb8_buf_diff; 185 cfb_copyarea(info, area); 186 info->screen_base -= ep->fb8_buf_diff; 187 spin_unlock_irqrestore(&ep->lock, flags); 188 } 189 190 static const struct fb_ops e3d_ops = { 191 .owner = THIS_MODULE, 192 .fb_setcolreg = e3d_setcolreg, 193 .fb_fillrect = e3d_fillrect, 194 .fb_copyarea = e3d_copyarea, 195 .fb_imageblit = e3d_imageblit, 196 }; 197 198 static int e3d_set_fbinfo(struct e3d_info *ep) 199 { 200 struct fb_info *info = ep->info; 201 struct fb_var_screeninfo *var = &info->var; 202 203 info->fbops = &e3d_ops; 204 info->screen_base = ep->fb_base; 205 info->screen_size = ep->fb_size; 206 207 info->pseudo_palette = ep->pseudo_palette; 208 209 /* Fill fix common fields */ 210 strscpy(info->fix.id, "e3d", sizeof(info->fix.id)); 211 info->fix.smem_start = ep->fb_base_phys; 212 info->fix.smem_len = ep->fb_size; 213 info->fix.type = FB_TYPE_PACKED_PIXELS; 214 if (ep->depth == 32 || ep->depth == 24) 215 info->fix.visual = FB_VISUAL_TRUECOLOR; 216 else 217 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 218 219 var->xres = ep->width; 220 var->yres = ep->height; 221 var->xres_virtual = var->xres; 222 var->yres_virtual = var->yres; 223 var->bits_per_pixel = ep->depth; 224 225 var->red.offset = 8; 226 var->red.length = 8; 227 var->green.offset = 16; 228 var->green.length = 8; 229 var->blue.offset = 24; 230 var->blue.length = 8; 231 var->transp.offset = 0; 232 var->transp.length = 0; 233 234 if (fb_alloc_cmap(&info->cmap, 256, 0)) { 235 printk(KERN_ERR "e3d: Cannot allocate color map.\n"); 236 return -ENOMEM; 237 } 238 239 return 0; 240 } 241 242 static int e3d_pci_register(struct pci_dev *pdev, 243 const struct pci_device_id *ent) 244 { 245 struct device_node *of_node; 246 const char *device_type; 247 struct fb_info *info; 248 struct e3d_info *ep; 249 unsigned int line_length; 250 int err; 251 252 err = aperture_remove_conflicting_pci_devices(pdev, "e3dfb"); 253 if (err) 254 return err; 255 256 of_node = pci_device_to_OF_node(pdev); 257 if (!of_node) { 258 printk(KERN_ERR "e3d: Cannot find OF node of %s\n", 259 pci_name(pdev)); 260 return -ENODEV; 261 } 262 263 device_type = of_get_property(of_node, "device_type", NULL); 264 if (!device_type) { 265 printk(KERN_INFO "e3d: Ignoring secondary output device " 266 "at %s\n", pci_name(pdev)); 267 return -ENODEV; 268 } 269 270 err = pci_enable_device(pdev); 271 if (err < 0) { 272 printk(KERN_ERR "e3d: Cannot enable PCI device %s\n", 273 pci_name(pdev)); 274 goto err_out; 275 } 276 277 info = framebuffer_alloc(sizeof(struct e3d_info), &pdev->dev); 278 if (!info) { 279 err = -ENOMEM; 280 goto err_disable; 281 } 282 283 ep = info->par; 284 ep->info = info; 285 ep->pdev = pdev; 286 spin_lock_init(&ep->lock); 287 ep->of_node = of_node; 288 289 /* Read the PCI base register of the frame buffer, which we 290 * need in order to interpret the RAMDAC_VID_*FB* values in 291 * the ramdac correctly. 292 */ 293 pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, 294 &ep->fb_base_reg); 295 ep->fb_base_reg &= PCI_BASE_ADDRESS_MEM_MASK; 296 297 ep->regs_base_phys = pci_resource_start (pdev, 1); 298 err = pci_request_region(pdev, 1, "e3d regs"); 299 if (err < 0) { 300 printk("e3d: Cannot request region 1 for %s\n", 301 pci_name(pdev)); 302 goto err_release_fb; 303 } 304 ep->ramdac = ioremap(ep->regs_base_phys + 0x8000, 0x1000); 305 if (!ep->ramdac) { 306 err = -ENOMEM; 307 goto err_release_pci1; 308 } 309 310 ep->fb8_0_off = readl(ep->ramdac + RAMDAC_VID_8FB_0); 311 ep->fb8_0_off -= ep->fb_base_reg; 312 313 ep->fb8_1_off = readl(ep->ramdac + RAMDAC_VID_8FB_1); 314 ep->fb8_1_off -= ep->fb_base_reg; 315 316 ep->fb8_buf_diff = ep->fb8_1_off - ep->fb8_0_off; 317 318 ep->fb_base_phys = pci_resource_start (pdev, 0); 319 ep->fb_base_phys += ep->fb8_0_off; 320 321 err = pci_request_region(pdev, 0, "e3d framebuffer"); 322 if (err < 0) { 323 printk("e3d: Cannot request region 0 for %s\n", 324 pci_name(pdev)); 325 goto err_unmap_ramdac; 326 } 327 328 err = e3d_get_props(ep); 329 if (err) 330 goto err_release_pci0; 331 332 line_length = (readl(ep->ramdac + RAMDAC_VID_CFG) >> 16) & 0xff; 333 line_length = 1 << line_length; 334 335 switch (ep->depth) { 336 case 8: 337 info->fix.line_length = line_length; 338 break; 339 case 16: 340 info->fix.line_length = line_length * 2; 341 break; 342 case 24: 343 info->fix.line_length = line_length * 3; 344 break; 345 case 32: 346 info->fix.line_length = line_length * 4; 347 break; 348 } 349 ep->fb_size = info->fix.line_length * ep->height; 350 351 ep->fb_base = ioremap(ep->fb_base_phys, ep->fb_size); 352 if (!ep->fb_base) { 353 err = -ENOMEM; 354 goto err_release_pci0; 355 } 356 357 err = e3d_set_fbinfo(ep); 358 if (err) 359 goto err_unmap_fb; 360 361 pci_set_drvdata(pdev, info); 362 363 printk("e3d: Found device at %s\n", pci_name(pdev)); 364 365 err = register_framebuffer(info); 366 if (err < 0) { 367 printk(KERN_ERR "e3d: Could not register framebuffer %s\n", 368 pci_name(pdev)); 369 goto err_free_cmap; 370 } 371 372 return 0; 373 374 err_free_cmap: 375 fb_dealloc_cmap(&info->cmap); 376 377 err_unmap_fb: 378 iounmap(ep->fb_base); 379 380 err_release_pci0: 381 pci_release_region(pdev, 0); 382 383 err_unmap_ramdac: 384 iounmap(ep->ramdac); 385 386 err_release_pci1: 387 pci_release_region(pdev, 1); 388 389 err_release_fb: 390 framebuffer_release(info); 391 392 err_disable: 393 pci_disable_device(pdev); 394 395 err_out: 396 return err; 397 } 398 399 static const struct pci_device_id e3d_pci_table[] = { 400 { PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a0), }, 401 { PCI_DEVICE(0x1091, 0x7a0), }, 402 { PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a2), }, 403 { .vendor = PCI_VENDOR_ID_3DLABS, 404 .device = PCI_ANY_ID, 405 .subvendor = PCI_VENDOR_ID_3DLABS, 406 .subdevice = 0x0108, 407 }, 408 { .vendor = PCI_VENDOR_ID_3DLABS, 409 .device = PCI_ANY_ID, 410 .subvendor = PCI_VENDOR_ID_3DLABS, 411 .subdevice = 0x0140, 412 }, 413 { .vendor = PCI_VENDOR_ID_3DLABS, 414 .device = PCI_ANY_ID, 415 .subvendor = PCI_VENDOR_ID_3DLABS, 416 .subdevice = 0x1024, 417 }, 418 { 0, } 419 }; 420 421 static struct pci_driver e3d_driver = { 422 .driver = { 423 .suppress_bind_attrs = true, 424 }, 425 .name = "e3d", 426 .id_table = e3d_pci_table, 427 .probe = e3d_pci_register, 428 }; 429 430 static int __init e3d_init(void) 431 { 432 if (fb_modesetting_disabled("e3d")) 433 return -ENODEV; 434 435 if (fb_get_options("e3d", NULL)) 436 return -ENODEV; 437 438 return pci_register_driver(&e3d_driver); 439 } 440 device_initcall(e3d_init); 441