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