drivers/video/tcx.c

   1 /* tcx.c: TCX frame buffer driver
   2  *
   3  * Copyright (C) 2003 David S. Miller (davem@redhat.com)
   4  * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
   5  * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
   6  * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
   7  *
   8  * Driver layout based loosely on tgafb.c, see that file for credits.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/errno.h>
  14 #include <linux/string.h>
  15 #include <linux/slab.h>
  16 #include <linux/delay.h>
  17 #include <linux/init.h>
  18 #include <linux/fb.h>
  19 #include <linux/mm.h>
  20
  21 #include <asm/io.h>
  22 #include <asm/sbus.h>
  23 #include <asm/oplib.h>
  24 #include <asm/fbio.h>
  25
  26 #include "sbuslib.h"
  27
  28 /*
  29  * Local functions.
  30  */
  31
  32 static int tcx_setcolreg(unsigned, unsigned, unsigned, unsigned,
  33                          unsigned, struct fb_info *);
  34 static int tcx_blank(int, struct fb_info *);
  35
  36 static int tcx_mmap(struct fb_info *, struct file *, struct vm_area_struct *);
  37 static int tcx_ioctl(struct inode *, struct file *, unsigned int,
  38                      unsigned long, struct fb_info *);
  39 static int tcx_pan_display(struct fb_var_screeninfo *, struct fb_info *);
  40
  41 /*
  42  *  Frame buffer operations
  43  */
  44
  45 static struct fb_ops tcx_ops = {
  46         .owner                  = THIS_MODULE,
  47         .fb_setcolreg           = tcx_setcolreg,
  48         .fb_blank               = tcx_blank,
  49         .fb_pan_display         = tcx_pan_display,
  50         .fb_fillrect            = cfb_fillrect,
  51         .fb_copyarea            = cfb_copyarea,
  52         .fb_imageblit           = cfb_imageblit,
  53         .fb_mmap                = tcx_mmap,
  54         .fb_ioctl               = tcx_ioctl,
  55 #ifdef CONFIG_COMPAT
  56         .fb_compat_ioctl        = sbusfb_compat_ioctl,
  57 #endif
  58 };
  59
  60 /* THC definitions */
  61 #define TCX_THC_MISC_REV_SHIFT       16
  62 #define TCX_THC_MISC_REV_MASK        15
  63 #define TCX_THC_MISC_VSYNC_DIS       (1 << 25)
  64 #define TCX_THC_MISC_HSYNC_DIS       (1 << 24)
  65 #define TCX_THC_MISC_RESET           (1 << 12)
  66 #define TCX_THC_MISC_VIDEO           (1 << 10)
  67 #define TCX_THC_MISC_SYNC            (1 << 9)
  68 #define TCX_THC_MISC_VSYNC           (1 << 8)
  69 #define TCX_THC_MISC_SYNC_ENAB       (1 << 7)
  70 #define TCX_THC_MISC_CURS_RES        (1 << 6)
  71 #define TCX_THC_MISC_INT_ENAB        (1 << 5)
  72 #define TCX_THC_MISC_INT             (1 << 4)
  73 #define TCX_THC_MISC_INIT            0x9f
  74 #define TCX_THC_REV_REV_SHIFT        20
  75 #define TCX_THC_REV_REV_MASK         15
  76 #define TCX_THC_REV_MINREV_SHIFT     28
  77 #define TCX_THC_REV_MINREV_MASK      15
  78
  79 /* The contents are unknown */
  80 struct tcx_tec {
  81         volatile u32 tec_matrix;
  82         volatile u32 tec_clip;
  83         volatile u32 tec_vdc;
  84 };
  85
  86 struct tcx_thc {
  87         volatile u32 thc_rev;
  88         u32 thc_pad0[511];
  89         volatile u32 thc_hs;            /* hsync timing */
  90         volatile u32 thc_hsdvs;
  91         volatile u32 thc_hd;
  92         volatile u32 thc_vs;            /* vsync timing */
  93         volatile u32 thc_vd;
  94         volatile u32 thc_refresh;
  95         volatile u32 thc_misc;
  96         u32 thc_pad1[56];
  97         volatile u32 thc_cursxy;        /* cursor x,y position (16 bits each) */
  98         volatile u32 thc_cursmask[32];  /* cursor mask bits */
  99         volatile u32 thc_cursbits[32];  /* what to show where mask enabled */
 100 };
 101
 102 struct bt_regs {
 103         volatile u32 addr;
 104         volatile u32 color_map;
 105         volatile u32 control;
 106         volatile u32 cursor;
 107 };
 108
 109 #define TCX_MMAP_ENTRIES 14
 110
 111 struct tcx_par {
 112         spinlock_t              lock;
 113         struct bt_regs          __iomem *bt;
 114         struct tcx_thc          __iomem *thc;
 115         struct tcx_tec          __iomem *tec;
 116         volatile u32            __iomem *cplane;
 117
 118         u32                     flags;
 119 #define TCX_FLAG_BLANKED        0x00000001
 120
 121         unsigned long           physbase;
 122         unsigned long           fbsize;
 123
 124         struct sbus_mmap_map    mmap_map[TCX_MMAP_ENTRIES];
 125         int                     lowdepth;
 126
 127         struct sbus_dev         *sdev;
 128 };
 129
 130 /* Reset control plane so that WID is 8-bit plane. */
 131 static void __tcx_set_control_plane (struct tcx_par *par)
 132 {
 133         volatile u32 __iomem *p, *pend;
 134
 135         if (par->lowdepth)
 136                 return;
 137
 138         p = par->cplane;
 139         if (p == NULL)
 140                 return;
 141         for (pend = p + par->fbsize; p < pend; p++) {
 142                 u32 tmp = sbus_readl(p);
 143
 144                 tmp &= 0xffffff;
 145                 sbus_writel(tmp, p);
 146         }
 147 }
 148
 149 static void tcx_reset (struct fb_info *info)
 150 {
 151         struct tcx_par *par = (struct tcx_par *) info->par;
 152         unsigned long flags;
 153
 154         spin_lock_irqsave(&par->lock, flags);
 155         __tcx_set_control_plane(par);
 156         spin_unlock_irqrestore(&par->lock, flags);
 157 }
 158
 159 static int tcx_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 160 {
 161         tcx_reset(info);
 162         return 0;
 163 }
 164
 165 /**
 166  *      tcx_setcolreg - Optional function. Sets a color register.
 167  *      @regno: boolean, 0 copy local, 1 get_user() function
 168  *      @red: frame buffer colormap structure
 169  *      @green: The green value which can be up to 16 bits wide
 170  *      @blue:  The blue value which can be up to 16 bits wide.
 171  *      @transp: If supported the alpha value which can be up to 16 bits wide.
 172  *      @info: frame buffer info structure
 173  */
 174 static int tcx_setcolreg(unsigned regno,
 175                          unsigned red, unsigned green, unsigned blue,
 176                          unsigned transp, struct fb_info *info)
 177 {
 178         struct tcx_par *par = (struct tcx_par *) info->par;
 179         struct bt_regs __iomem *bt = par->bt;
 180         unsigned long flags;
 181
 182         if (regno >= 256)
 183                 return 1;
 184
 185         red >>= 8;
 186         green >>= 8;
 187         blue >>= 8;
 188
 189         spin_lock_irqsave(&par->lock, flags);
 190
 191         sbus_writel(regno << 24, &bt->addr);
 192         sbus_writel(red << 24, &bt->color_map);
 193         sbus_writel(green << 24, &bt->color_map);
 194         sbus_writel(blue << 24, &bt->color_map);
 195
 196         spin_unlock_irqrestore(&par->lock, flags);
 197
 198         return 0;
 199 }
 200
 201 /**
 202  *      tcx_blank - Optional function.  Blanks the display.
 203  *      @blank_mode: the blank mode we want.
 204  *      @info: frame buffer structure that represents a single frame buffer
 205  */
 206 static int
 207 tcx_blank(int blank, struct fb_info *info)
 208 {
 209         struct tcx_par *par = (struct tcx_par *) info->par;
 210         struct tcx_thc __iomem *thc = par->thc;
 211         unsigned long flags;
 212         u32 val;
 213
 214         spin_lock_irqsave(&par->lock, flags);
 215
 216         val = sbus_readl(&thc->thc_misc);
 217
 218         switch (blank) {
 219         case FB_BLANK_UNBLANK: /* Unblanking */
 220                 val &= ~(TCX_THC_MISC_VSYNC_DIS |
 221                          TCX_THC_MISC_HSYNC_DIS);
 222                 val |= TCX_THC_MISC_VIDEO;
 223                 par->flags &= ~TCX_FLAG_BLANKED;
 224                 break;
 225
 226         case FB_BLANK_NORMAL: /* Normal blanking */
 227                 val &= ~TCX_THC_MISC_VIDEO;
 228                 par->flags |= TCX_FLAG_BLANKED;
 229                 break;
 230
 231         case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
 232                 val |= TCX_THC_MISC_VSYNC_DIS;
 233                 break;
 234         case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
 235                 val |= TCX_THC_MISC_HSYNC_DIS;
 236                 break;
 237
 238         case FB_BLANK_POWERDOWN: /* Poweroff */
 239                 break;
 240         };
 241
 242         sbus_writel(val, &thc->thc_misc);
 243
 244         spin_unlock_irqrestore(&par->lock, flags);
 245
 246         return 0;
 247 }
 248
 249 static struct sbus_mmap_map __tcx_mmap_map[TCX_MMAP_ENTRIES] = {
 250         {
 251                 .voff   = TCX_RAM8BIT,
 252                 .size   = SBUS_MMAP_FBSIZE(1)
 253         },
 254         {
 255                 .voff   = TCX_RAM24BIT,
 256                 .size   = SBUS_MMAP_FBSIZE(4)
 257         },
 258         {
 259                 .voff   = TCX_UNK3,
 260                 .size   = SBUS_MMAP_FBSIZE(8)
 261         },
 262         {
 263                 .voff   = TCX_UNK4,
 264                 .size   = SBUS_MMAP_FBSIZE(8)
 265         },
 266         {
 267                 .voff   = TCX_CONTROLPLANE,
 268                 .size   = SBUS_MMAP_FBSIZE(4)
 269         },
 270         {
 271                 .voff   = TCX_UNK6,
 272                 .size   = SBUS_MMAP_FBSIZE(8)
 273         },
 274         {
 275                 .voff   = TCX_UNK7,
 276                 .size   = SBUS_MMAP_FBSIZE(8)
 277         },
 278         {
 279                 .voff   = TCX_TEC,
 280                 .size   = PAGE_SIZE
 281         },
 282         {
 283                 .voff   = TCX_BTREGS,
 284                 .size   = PAGE_SIZE
 285         },
 286         {
 287                 .voff   = TCX_THC,
 288                 .size   = PAGE_SIZE
 289         },
 290         {
 291                 .voff   = TCX_DHC,
 292                 .size   = PAGE_SIZE
 293         },
 294         {
 295                 .voff   = TCX_ALT,
 296                 .size   = PAGE_SIZE
 297         },
 298         {
 299                 .voff   = TCX_UNK2,
 300                 .size   = 0x20000
 301         },
 302         { .size = 0 }
 303 };
 304
 305 static int tcx_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma)
 306 {
 307         struct tcx_par *par = (struct tcx_par *)info->par;
 308
 309         return sbusfb_mmap_helper(par->mmap_map,
 310                                   par->physbase, par->fbsize,
 311                                   par->sdev->reg_addrs[0].which_io,
 312                                   vma);
 313 }
 314
 315 static int tcx_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 316                      unsigned long arg, struct fb_info *info)
 317 {
 318         struct tcx_par *par = (struct tcx_par *) info->par;
 319
 320         return sbusfb_ioctl_helper(cmd, arg, info,
 321                                    FBTYPE_TCXCOLOR,
 322                                    (par->lowdepth ? 8 : 24),
 323                                    par->fbsize);
 324 }
 325
 326 /*
 327  *  Initialisation
 328  */
 329
 330 static void
 331 tcx_init_fix(struct fb_info *info, int linebytes)
 332 {
 333         struct tcx_par *par = (struct tcx_par *)info->par;
 334         const char *tcx_name;
 335
 336         if (par->lowdepth)
 337                 tcx_name = "TCX8";
 338         else
 339                 tcx_name = "TCX24";
 340
 341         strlcpy(info->fix.id, tcx_name, sizeof(info->fix.id));
 342
 343         info->fix.type = FB_TYPE_PACKED_PIXELS;
 344         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 345
 346         info->fix.line_length = linebytes;
 347
 348         info->fix.accel = FB_ACCEL_SUN_TCX;
 349 }
 350
 351 struct all_info {
 352         struct fb_info info;
 353         struct tcx_par par;
 354         struct list_head list;
 355 };
 356 static LIST_HEAD(tcx_list);
 357
 358 static void tcx_init_one(struct sbus_dev *sdev)
 359 {
 360         struct all_info *all;
 361         int linebytes, i;
 362
 363         all = kmalloc(sizeof(*all), GFP_KERNEL);
 364         if (!all) {
 365                 printk(KERN_ERR "tcx: Cannot allocate memory.\n");
 366                 return;
 367         }
 368         memset(all, 0, sizeof(*all));
 369
 370         INIT_LIST_HEAD(&all->list);
 371
 372         spin_lock_init(&all->par.lock);
 373         all->par.sdev = sdev;
 374
 375         all->par.lowdepth = prom_getbool(sdev->prom_node, "tcx-8-bit");
 376
 377         sbusfb_fill_var(&all->info.var, sdev->prom_node, 8);
 378         all->info.var.red.length = 8;
 379         all->info.var.green.length = 8;
 380         all->info.var.blue.length = 8;
 381
 382         linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
 383                                        all->info.var.xres);
 384         all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
 385
 386         all->par.tec = sbus_ioremap(&sdev->resource[7], 0,
 387                              sizeof(struct tcx_tec), "tcx tec");
 388         all->par.thc = sbus_ioremap(&sdev->resource[9], 0,
 389                              sizeof(struct tcx_thc), "tcx thc");
 390         all->par.bt = sbus_ioremap(&sdev->resource[8], 0,
 391                              sizeof(struct bt_regs), "tcx dac");
 392         memcpy(&all->par.mmap_map, &__tcx_mmap_map, sizeof(all->par.mmap_map));
 393         if (!all->par.lowdepth) {
 394                 all->par.cplane = sbus_ioremap(&sdev->resource[4], 0,
 395                                      all->par.fbsize * sizeof(u32), "tcx cplane");
 396         } else {
 397                 all->par.mmap_map[1].size = SBUS_MMAP_EMPTY;
 398                 all->par.mmap_map[4].size = SBUS_MMAP_EMPTY;
 399                 all->par.mmap_map[5].size = SBUS_MMAP_EMPTY;
 400                 all->par.mmap_map[6].size = SBUS_MMAP_EMPTY;
 401         }
 402
 403         all->par.physbase = 0;
 404         for (i = 0; i < TCX_MMAP_ENTRIES; i++) {
 405                 int j;
 406
 407                 switch (i) {
 408                 case 10:
 409                         j = 12;
 410                         break;
 411
 412                 case 11: case 12:
 413                         j = i - 1;
 414                         break;
 415
 416                 default:
 417                         j = i;
 418                         break;
 419                 };
 420                 all->par.mmap_map[i].poff = sdev->reg_addrs[j].phys_addr;
 421         }
 422
 423         all->info.flags = FBINFO_DEFAULT;
 424         all->info.fbops = &tcx_ops;
 425 #ifdef CONFIG_SPARC32
 426         all->info.screen_base = (char __iomem *)
 427                 prom_getintdefault(sdev->prom_node, "address", 0);
 428 #endif
 429         if (!all->info.screen_base)
 430                 all->info.screen_base = sbus_ioremap(&sdev->resource[0], 0,
 431                                      all->par.fbsize, "tcx ram");
 432         all->info.par = &all->par;
 433
 434         /* Initialize brooktree DAC. */
 435         sbus_writel(0x04 << 24, &all->par.bt->addr);         /* color planes */
 436         sbus_writel(0xff << 24, &all->par.bt->control);
 437         sbus_writel(0x05 << 24, &all->par.bt->addr);
 438         sbus_writel(0x00 << 24, &all->par.bt->control);
 439         sbus_writel(0x06 << 24, &all->par.bt->addr);         /* overlay plane */
 440         sbus_writel(0x73 << 24, &all->par.bt->control);
 441         sbus_writel(0x07 << 24, &all->par.bt->addr);
 442         sbus_writel(0x00 << 24, &all->par.bt->control);
 443
 444         tcx_reset(&all->info);
 445
 446         tcx_blank(FB_BLANK_UNBLANK, &all->info);
 447
 448         if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
 449                 printk(KERN_ERR "tcx: Could not allocate color map.\n");
 450                 kfree(all);
 451                 return;
 452         }
 453
 454         fb_set_cmap(&all->info.cmap, &all->info);
 455         tcx_init_fix(&all->info, linebytes);
 456
 457         if (register_framebuffer(&all->info) < 0) {
 458                 printk(KERN_ERR "tcx: Could not register framebuffer.\n");
 459                 fb_dealloc_cmap(&all->info.cmap);
 460                 kfree(all);
 461                 return;
 462         }
 463
 464         list_add(&all->list, &tcx_list);
 465
 466         printk("tcx: %s at %lx:%lx, %s\n",
 467                sdev->prom_name,
 468                (long) sdev->reg_addrs[0].which_io,
 469                (long) sdev->reg_addrs[0].phys_addr,
 470                all->par.lowdepth ? "8-bit only" : "24-bit depth");
 471 }
 472
 473 int __init tcx_init(void)
 474 {
 475         struct sbus_bus *sbus;
 476         struct sbus_dev *sdev;
 477
 478         if (fb_get_options("tcxfb", NULL))
 479                 return -ENODEV;
 480
 481         for_all_sbusdev(sdev, sbus) {
 482                 if (!strcmp(sdev->prom_name, "SUNW,tcx"))
 483                         tcx_init_one(sdev);
 484         }
 485
 486         return 0;
 487 }
 488
 489 void __exit tcx_exit(void)
 490 {
 491         struct list_head *pos, *tmp;
 492
 493         list_for_each_safe(pos, tmp, &tcx_list) {
 494                 struct all_info *all = list_entry(pos, typeof(*all), list);
 495
 496                 unregister_framebuffer(&all->info);
 497                 fb_dealloc_cmap(&all->info.cmap);
 498                 kfree(all);
 499         }
 500 }
 501
 502 int __init
 503 tcx_setup(char *arg)
 504 {
 505         /* No cmdline options yet... */
 506         return 0;
 507 }
 508
 509 module_init(tcx_init);
 510
 511 #ifdef MODULE
 512 module_exit(tcx_exit);
 513 #endif
 514
 515 MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
 516 MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
 517 MODULE_LICENSE("GPL");