release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/video/geode/gxfb_core.c

   1 /*
   2  * Geode GX framebuffer driver.
   3  *
   4  *   Copyright (C) 2006 Arcom Control Systems Ltd.
   5  *
   6  *   This program is free software; you can redistribute it and/or modify it
   7  *   under the terms of the GNU General Public License as published by the
   8  *   Free Software Foundation; either version 2 of the License, or (at your
   9  *   option) any later version.
  10  *
  11  *
  12  * This driver assumes that the BIOS has created a virtual PCI device header
  13  * for the video device. The PCI header is assumed to contain the following
  14  * BARs:
  15  *
  16  *    BAR0 - framebuffer memory
  17  *    BAR1 - graphics processor registers
  18  *    BAR2 - display controller registers
  19  *    BAR3 - video processor and flat panel control registers.
  20  *
  21  * 16 MiB of framebuffer memory is assumed to be available.
  22  */
  23 #include <linux/module.h>
  24 #include <linux/kernel.h>
  25 #include <linux/errno.h>
  26 #include <linux/string.h>
  27 #include <linux/mm.h>
  28 #include <linux/delay.h>
  29 #include <linux/fb.h>
  30 #include <linux/console.h>
  31 #include <linux/suspend.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/cs5535.h>
  35
  36 #include "gxfb.h"
  37
  38 static char *mode_option;
  39 static int vram;
  40 static int vt_switch;
  41
  42 /* Modes relevant to the GX (taken from modedb.c) */
  43 static struct fb_videomode gx_modedb[] __devinitdata = {
  44         /* 640x480-60 VESA */
  45         { NULL, 60, 640, 480, 39682,  48, 16, 33, 10, 96, 2,
  46           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  47         /* 640x480-75 VESA */
  48         { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
  49           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  50         /* 640x480-85 VESA */
  51         { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
  52           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  53         /* 800x600-60 VESA */
  54         { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
  55           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  56           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  57         /* 800x600-75 VESA */
  58         { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
  59           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  60           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  61         /* 800x600-85 VESA */
  62         { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
  63           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  64           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  65         /* 1024x768-60 VESA */
  66         { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
  67           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  68         /* 1024x768-75 VESA */
  69         { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
  70           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  71           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  72         /* 1024x768-85 VESA */
  73         { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
  74           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  75           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  76         /* 1280x960-60 VESA */
  77         { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
  78           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  79           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  80         /* 1280x960-85 VESA */
  81         { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
  82           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  83           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  84         /* 1280x1024-60 VESA */
  85         { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
  86           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  87           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  88         /* 1280x1024-75 VESA */
  89         { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
  90           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  91           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  92         /* 1280x1024-85 VESA */
  93         { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
  94           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  95           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
  96         /* 1600x1200-60 VESA */
  97         { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
  98           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  99           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 100         /* 1600x1200-75 VESA */
 101         { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
 102           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 103           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 104         /* 1600x1200-85 VESA */
 105         { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
 106           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 107           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 108 };
 109
 110 #ifdef CONFIG_OLPC
 111 #include <asm/olpc.h>
 112
 113 static struct fb_videomode gx_dcon_modedb[] __devinitdata = {
 114         /* The only mode the DCON has is 1200x900 */
 115         { NULL, 50, 1200, 900, 17460, 24, 8, 4, 5, 8, 3,
 116           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 117           FB_VMODE_NONINTERLACED, 0 }
 118 };
 119
 120 static void __devinit get_modedb(struct fb_videomode **modedb,
 121                 unsigned int *size)
 122 {
 123         if (olpc_has_dcon()) {
 124                 *modedb = (struct fb_videomode *) gx_dcon_modedb;
 125                 *size = ARRAY_SIZE(gx_dcon_modedb);
 126         } else {
 127                 *modedb = (struct fb_videomode *) gx_modedb;
 128                 *size = ARRAY_SIZE(gx_modedb);
 129         }
 130 }
 131
 132 #else
 133 static void __devinit get_modedb(struct fb_videomode **modedb,
 134                 unsigned int *size)
 135 {
 136         *modedb = (struct fb_videomode *) gx_modedb;
 137         *size = ARRAY_SIZE(gx_modedb);
 138 }
 139 #endif
 140
 141 static int gxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 142 {
 143         if (var->xres > 1600 || var->yres > 1200)
 144                 return -EINVAL;
 145         if ((var->xres > 1280 || var->yres > 1024) && var->bits_per_pixel > 16)
 146                 return -EINVAL;
 147
 148         if (var->bits_per_pixel == 32) {
 149                 var->red.offset   = 16; var->red.length   = 8;
 150                 var->green.offset =  8; var->green.length = 8;
 151                 var->blue.offset  =  0; var->blue.length  = 8;
 152         } else if (var->bits_per_pixel == 16) {
 153                 var->red.offset   = 11; var->red.length   = 5;
 154                 var->green.offset =  5; var->green.length = 6;
 155                 var->blue.offset  =  0; var->blue.length  = 5;
 156         } else if (var->bits_per_pixel == 8) {
 157                 var->red.offset   = 0; var->red.length   = 8;
 158                 var->green.offset = 0; var->green.length = 8;
 159                 var->blue.offset  = 0; var->blue.length  = 8;
 160         } else
 161                 return -EINVAL;
 162         var->transp.offset = 0; var->transp.length = 0;
 163
 164         /* Enough video memory? */
 165         if (gx_line_delta(var->xres, var->bits_per_pixel) * var->yres > info->fix.smem_len)
 166                 return -EINVAL;
 167
 168
 169         return 0;
 170 }
 171
 172 static int gxfb_set_par(struct fb_info *info)
 173 {
 174         if (info->var.bits_per_pixel > 8)
 175                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 176         else
 177                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 178
 179         info->fix.line_length = gx_line_delta(info->var.xres, info->var.bits_per_pixel);
 180
 181         gx_set_mode(info);
 182
 183         return 0;
 184 }
 185
 186 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
 187 {
 188         chan &= 0xffff;
 189         chan >>= 16 - bf->length;
 190         return chan << bf->offset;
 191 }
 192
 193 static int gxfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 194                            unsigned blue, unsigned transp,
 195                            struct fb_info *info)
 196 {
 197         if (info->var.grayscale) {
 198                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 199                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 200         }
 201
 202         /* Truecolor has hardware independent palette */
 203         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 204                 u32 *pal = info->pseudo_palette;
 205                 u32 v;
 206
 207                 if (regno >= 16)
 208                         return -EINVAL;
 209
 210                 v  = chan_to_field(red, &info->var.red);
 211                 v |= chan_to_field(green, &info->var.green);
 212                 v |= chan_to_field(blue, &info->var.blue);
 213
 214                 pal[regno] = v;
 215         } else {
 216                 if (regno >= 256)
 217                         return -EINVAL;
 218
 219                 gx_set_hw_palette_reg(info, regno, red, green, blue);
 220         }
 221
 222         return 0;
 223 }
 224
 225 static int gxfb_blank(int blank_mode, struct fb_info *info)
 226 {
 227         return gx_blank_display(info, blank_mode);
 228 }
 229
 230 static int __devinit gxfb_map_video_memory(struct fb_info *info,
 231                 struct pci_dev *dev)
 232 {
 233         struct gxfb_par *par = info->par;
 234         int ret;
 235
 236         ret = pci_enable_device(dev);
 237         if (ret < 0)
 238                 return ret;
 239
 240         ret = pci_request_region(dev, 3, "gxfb (video processor)");
 241         if (ret < 0)
 242                 return ret;
 243         par->vid_regs = pci_ioremap_bar(dev, 3);
 244         if (!par->vid_regs)
 245                 return -ENOMEM;
 246
 247         ret = pci_request_region(dev, 2, "gxfb (display controller)");
 248         if (ret < 0)
 249                 return ret;
 250         par->dc_regs = pci_ioremap_bar(dev, 2);
 251         if (!par->dc_regs)
 252                 return -ENOMEM;
 253
 254         ret = pci_request_region(dev, 1, "gxfb (graphics processor)");
 255         if (ret < 0)
 256                 return ret;
 257         par->gp_regs = pci_ioremap_bar(dev, 1);
 258
 259         if (!par->gp_regs)
 260                 return -ENOMEM;
 261
 262         ret = pci_request_region(dev, 0, "gxfb (framebuffer)");
 263         if (ret < 0)
 264                 return ret;
 265
 266         info->fix.smem_start = pci_resource_start(dev, 0);
 267         info->fix.smem_len = vram ? vram : gx_frame_buffer_size();
 268         info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
 269         if (!info->screen_base)
 270                 return -ENOMEM;
 271
 272         /* Set the 16MiB aligned base address of the graphics memory region
 273          * in the display controller */
 274
 275         write_dc(par, DC_GLIU0_MEM_OFFSET, info->fix.smem_start & 0xFF000000);
 276
 277         dev_info(&dev->dev, "%d KiB of video memory at 0x%lx\n",
 278                  info->fix.smem_len / 1024, info->fix.smem_start);
 279
 280         return 0;
 281 }
 282
 283 static struct fb_ops gxfb_ops = {
 284         .owner          = THIS_MODULE,
 285         .fb_check_var   = gxfb_check_var,
 286         .fb_set_par     = gxfb_set_par,
 287         .fb_setcolreg   = gxfb_setcolreg,
 288         .fb_blank       = gxfb_blank,
 289         /* No HW acceleration for now. */
 290         .fb_fillrect    = cfb_fillrect,
 291         .fb_copyarea    = cfb_copyarea,
 292         .fb_imageblit   = cfb_imageblit,
 293 };
 294
 295 static struct fb_info *__devinit gxfb_init_fbinfo(struct device *dev)
 296 {
 297         struct gxfb_par *par;
 298         struct fb_info *info;
 299
 300         /* Alloc enough space for the pseudo palette. */
 301         info = framebuffer_alloc(sizeof(struct gxfb_par) + sizeof(u32) * 16,
 302                         dev);
 303         if (!info)
 304                 return NULL;
 305
 306         par = info->par;
 307
 308         strcpy(info->fix.id, "Geode GX");
 309
 310         info->fix.type          = FB_TYPE_PACKED_PIXELS;
 311         info->fix.type_aux      = 0;
 312         info->fix.xpanstep      = 0;
 313         info->fix.ypanstep      = 0;
 314         info->fix.ywrapstep     = 0;
 315         info->fix.accel         = FB_ACCEL_NONE;
 316
 317         info->var.nonstd        = 0;
 318         info->var.activate      = FB_ACTIVATE_NOW;
 319         info->var.height        = -1;
 320         info->var.width = -1;
 321         info->var.accel_flags = 0;
 322         info->var.vmode = FB_VMODE_NONINTERLACED;
 323
 324         info->fbops             = &gxfb_ops;
 325         info->flags             = FBINFO_DEFAULT;
 326         info->node              = -1;
 327
 328         info->pseudo_palette    = (void *)par + sizeof(struct gxfb_par);
 329
 330         info->var.grayscale     = 0;
 331
 332         if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
 333                 framebuffer_release(info);
 334                 return NULL;
 335         }
 336
 337         return info;
 338 }
 339
 340 #ifdef CONFIG_PM
 341 static int gxfb_suspend(struct pci_dev *pdev, pm_message_t state)
 342 {
 343         struct fb_info *info = pci_get_drvdata(pdev);
 344
 345         if (state.event == PM_EVENT_SUSPEND) {
 346                 acquire_console_sem();
 347                 gx_powerdown(info);
 348                 fb_set_suspend(info, 1);
 349                 release_console_sem();
 350         }
 351
 352         /* there's no point in setting PCI states; we emulate PCI, so
 353          * we don't end up getting power savings anyways */
 354
 355         return 0;
 356 }
 357
 358 static int gxfb_resume(struct pci_dev *pdev)
 359 {
 360         struct fb_info *info = pci_get_drvdata(pdev);
 361         int ret;
 362
 363         acquire_console_sem();
 364         ret = gx_powerup(info);
 365         if (ret) {
 366                 printk(KERN_ERR "gxfb:  power up failed!\n");
 367                 return ret;
 368         }
 369
 370         fb_set_suspend(info, 0);
 371         release_console_sem();
 372         return 0;
 373 }
 374 #endif
 375
 376 static int __devinit gxfb_probe(struct pci_dev *pdev,
 377                 const struct pci_device_id *id)
 378 {
 379         struct gxfb_par *par;
 380         struct fb_info *info;
 381         int ret;
 382         unsigned long val;
 383
 384         struct fb_videomode *modedb_ptr;
 385         unsigned int modedb_size;
 386
 387         info = gxfb_init_fbinfo(&pdev->dev);
 388         if (!info)
 389                 return -ENOMEM;
 390         par = info->par;
 391
 392         if ((ret = gxfb_map_video_memory(info, pdev)) < 0) {
 393                 dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n");
 394                 goto err;
 395         }
 396
 397         /* Figure out if this is a TFT or CRT part */
 398
 399         rdmsrl(MSR_GX_GLD_MSR_CONFIG, val);
 400
 401         if ((val & MSR_GX_GLD_MSR_CONFIG_FP) == MSR_GX_GLD_MSR_CONFIG_FP)
 402                 par->enable_crt = 0;
 403         else
 404                 par->enable_crt = 1;
 405
 406         get_modedb(&modedb_ptr, &modedb_size);
 407         ret = fb_find_mode(&info->var, info, mode_option,
 408                            modedb_ptr, modedb_size, NULL, 16);
 409         if (ret == 0 || ret == 4) {
 410                 dev_err(&pdev->dev, "could not find valid video mode\n");
 411                 ret = -EINVAL;
 412                 goto err;
 413         }
 414
 415
 416         /* Clear the frame buffer of garbage. */
 417         memset_io(info->screen_base, 0, info->fix.smem_len);
 418
 419         gxfb_check_var(&info->var, info);
 420         gxfb_set_par(info);
 421
 422         pm_set_vt_switch(vt_switch);
 423
 424         if (register_framebuffer(info) < 0) {
 425                 ret = -EINVAL;
 426                 goto err;
 427         }
 428         pci_set_drvdata(pdev, info);
 429         printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id);
 430         return 0;
 431
 432   err:
 433         if (info->screen_base) {
 434                 iounmap(info->screen_base);
 435                 pci_release_region(pdev, 0);
 436         }
 437         if (par->vid_regs) {
 438                 iounmap(par->vid_regs);
 439                 pci_release_region(pdev, 3);
 440         }
 441         if (par->dc_regs) {
 442                 iounmap(par->dc_regs);
 443                 pci_release_region(pdev, 2);
 444         }
 445         if (par->gp_regs) {
 446                 iounmap(par->gp_regs);
 447                 pci_release_region(pdev, 1);
 448         }
 449
 450         if (info) {
 451                 fb_dealloc_cmap(&info->cmap);
 452                 framebuffer_release(info);
 453         }
 454         return ret;
 455 }
 456
 457 static void __devexit gxfb_remove(struct pci_dev *pdev)
 458 {
 459         struct fb_info *info = pci_get_drvdata(pdev);
 460         struct gxfb_par *par = info->par;
 461
 462         unregister_framebuffer(info);
 463
 464         iounmap((void __iomem *)info->screen_base);
 465         pci_release_region(pdev, 0);
 466
 467         iounmap(par->vid_regs);
 468         pci_release_region(pdev, 3);
 469
 470         iounmap(par->dc_regs);
 471         pci_release_region(pdev, 2);
 472
 473         iounmap(par->gp_regs);
 474         pci_release_region(pdev, 1);
 475
 476         fb_dealloc_cmap(&info->cmap);
 477         pci_set_drvdata(pdev, NULL);
 478
 479         framebuffer_release(info);
 480 }
 481
 482 static struct pci_device_id gxfb_id_table[] = {
 483         { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_GX_VIDEO) },
 484         { 0, }
 485 };
 486
 487 MODULE_DEVICE_TABLE(pci, gxfb_id_table);
 488
 489 static struct pci_driver gxfb_driver = {
 490         .name           = "gxfb",
 491         .id_table       = gxfb_id_table,
 492         .probe          = gxfb_probe,
 493         .remove         = gxfb_remove,
 494 #ifdef CONFIG_PM
 495         .suspend        = gxfb_suspend,
 496         .resume         = gxfb_resume,
 497 #endif
 498 };
 499
 500 #ifndef MODULE
 501 static int __init gxfb_setup(char *options)
 502 {
 503
 504         char *opt;
 505
 506         if (!options || !*options)
 507                 return 0;
 508
 509         while ((opt = strsep(&options, ",")) != NULL) {
 510                 if (!*opt)
 511                         continue;
 512
 513                 mode_option = opt;
 514         }
 515
 516         return 0;
 517 }
 518 #endif
 519
 520 static int __init gxfb_init(void)
 521 {
 522 #ifndef MODULE
 523         char *option = NULL;
 524
 525         if (fb_get_options("gxfb", &option))
 526                 return -ENODEV;
 527
 528         gxfb_setup(option);
 529 #endif
 530         return pci_register_driver(&gxfb_driver);
 531 }
 532
 533 static void __exit gxfb_cleanup(void)
 534 {
 535         pci_unregister_driver(&gxfb_driver);
 536 }
 537
 538 module_init(gxfb_init);
 539 module_exit(gxfb_cleanup);
 540
 541 module_param(mode_option, charp, 0);
 542 MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])");
 543
 544 module_param(vram, int, 0);
 545 MODULE_PARM_DESC(vram, "video memory size");
 546
 547 module_param(vt_switch, int, 0);
 548 MODULE_PARM_DESC(vt_switch, "enable VT switch during suspend/resume");
 549
 550 MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode GX");
 551 MODULE_LICENSE("GPL");