drivers/video/p9100.c

   1 /* p9100.c: P9100 frame buffer driver
   2  *
   3  * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
   4  * Copyright 1999 Derrick J Brashear (shadow@dementia.org)
   5  *
   6  * Driver layout based loosely on tgafb.c, see that file for credits.
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/kernel.h>
  11 #include <linux/errno.h>
  12 #include <linux/string.h>
  13 #include <linux/slab.h>
  14 #include <linux/delay.h>
  15 #include <linux/init.h>
  16 #include <linux/fb.h>
  17 #include <linux/mm.h>
  18
  19 #include <asm/io.h>
  20 #include <asm/prom.h>
  21 #include <asm/of_device.h>
  22 #include <asm/fbio.h>
  23
  24 #include "sbuslib.h"
  25
  26 /*
  27  * Local functions.
  28  */
  29
  30 static int p9100_setcolreg(unsigned, unsigned, unsigned, unsigned,
  31                            unsigned, struct fb_info *);
  32 static int p9100_blank(int, struct fb_info *);
  33
  34 static int p9100_mmap(struct fb_info *, struct vm_area_struct *);
  35 static int p9100_ioctl(struct fb_info *, unsigned int, unsigned long);
  36
  37 /*
  38  *  Frame buffer operations
  39  */
  40
  41 static struct fb_ops p9100_ops = {
  42         .owner                  = THIS_MODULE,
  43         .fb_setcolreg           = p9100_setcolreg,
  44         .fb_blank               = p9100_blank,
  45         .fb_fillrect            = cfb_fillrect,
  46         .fb_copyarea            = cfb_copyarea,
  47         .fb_imageblit           = cfb_imageblit,
  48         .fb_mmap                = p9100_mmap,
  49         .fb_ioctl               = p9100_ioctl,
  50 #ifdef CONFIG_COMPAT
  51         .fb_compat_ioctl        = sbusfb_compat_ioctl,
  52 #endif
  53 };
  54
  55 /* P9100 control registers */
  56 #define P9100_SYSCTL_OFF        0x0UL
  57 #define P9100_VIDEOCTL_OFF      0x100UL
  58 #define P9100_VRAMCTL_OFF       0x180UL
  59 #define P9100_RAMDAC_OFF        0x200UL
  60 #define P9100_VIDEOCOPROC_OFF   0x400UL
  61
  62 /* P9100 command registers */
  63 #define P9100_CMD_OFF 0x0UL
  64
  65 /* P9100 framebuffer memory */
  66 #define P9100_FB_OFF 0x0UL
  67
  68 /* 3 bits: 2=8bpp 3=16bpp 5=32bpp 7=24bpp */
  69 #define SYS_CONFIG_PIXELSIZE_SHIFT 26
  70
  71 #define SCREENPAINT_TIMECTL1_ENABLE_VIDEO 0x20 /* 0 = off, 1 = on */
  72
  73 struct p9100_regs {
  74         /* Registers for the system control */
  75         u32 sys_base;
  76         u32 sys_config;
  77         u32 sys_intr;
  78         u32 sys_int_ena;
  79         u32 sys_alt_rd;
  80         u32 sys_alt_wr;
  81         u32 sys_xxx[58];
  82
  83         /* Registers for the video control */
  84         u32 vid_base;
  85         u32 vid_hcnt;
  86         u32 vid_htotal;
  87         u32 vid_hsync_rise;
  88         u32 vid_hblank_rise;
  89         u32 vid_hblank_fall;
  90         u32 vid_hcnt_preload;
  91         u32 vid_vcnt;
  92         u32 vid_vlen;
  93         u32 vid_vsync_rise;
  94         u32 vid_vblank_rise;
  95         u32 vid_vblank_fall;
  96         u32 vid_vcnt_preload;
  97         u32 vid_screenpaint_addr;
  98         u32 vid_screenpaint_timectl1;
  99         u32 vid_screenpaint_qsfcnt;
 100         u32 vid_screenpaint_timectl2;
 101         u32 vid_xxx[15];
 102
 103         /* Registers for the video control */
 104         u32 vram_base;
 105         u32 vram_memcfg;
 106         u32 vram_refresh_pd;
 107         u32 vram_refresh_cnt;
 108         u32 vram_raslo_max;
 109         u32 vram_raslo_cur;
 110         u32 pwrup_cfg;
 111         u32 vram_xxx[25];
 112
 113         /* Registers for IBM RGB528 Palette */
 114         u32 ramdac_cmap_wridx;
 115         u32 ramdac_palette_data;
 116         u32 ramdac_pixel_mask;
 117         u32 ramdac_palette_rdaddr;
 118         u32 ramdac_idx_lo;
 119         u32 ramdac_idx_hi;
 120         u32 ramdac_idx_data;
 121         u32 ramdac_idx_ctl;
 122         u32 ramdac_xxx[1784];
 123 };
 124
 125 struct p9100_cmd_parameng {
 126         u32 parameng_status;
 127         u32 parameng_bltcmd;
 128         u32 parameng_quadcmd;
 129 };
 130
 131 struct p9100_par {
 132         spinlock_t              lock;
 133         struct p9100_regs       __iomem *regs;
 134
 135         u32                     flags;
 136 #define P9100_FLAG_BLANKED      0x00000001
 137
 138         unsigned long           physbase;
 139         unsigned long           which_io;
 140         unsigned long           fbsize;
 141 };
 142
 143 /**
 144  *      p9100_setcolreg - Optional function. Sets a color register.
 145  *      @regno: boolean, 0 copy local, 1 get_user() function
 146  *      @red: frame buffer colormap structure
 147  *      @green: The green value which can be up to 16 bits wide
 148  *      @blue:  The blue value which can be up to 16 bits wide.
 149  *      @transp: If supported the alpha value which can be up to 16 bits wide.
 150  *      @info: frame buffer info structure
 151  */
 152 static int p9100_setcolreg(unsigned regno,
 153                            unsigned red, unsigned green, unsigned blue,
 154                            unsigned transp, struct fb_info *info)
 155 {
 156         struct p9100_par *par = (struct p9100_par *) info->par;
 157         struct p9100_regs __iomem *regs = par->regs;
 158         unsigned long flags;
 159
 160         if (regno >= 256)
 161                 return 1;
 162
 163         red >>= 8;
 164         green >>= 8;
 165         blue >>= 8;
 166
 167         spin_lock_irqsave(&par->lock, flags);
 168
 169         sbus_writel((regno << 16), &regs->ramdac_cmap_wridx);
 170         sbus_writel((red << 16), &regs->ramdac_palette_data);
 171         sbus_writel((green << 16), &regs->ramdac_palette_data);
 172         sbus_writel((blue << 16), &regs->ramdac_palette_data);
 173
 174         spin_unlock_irqrestore(&par->lock, flags);
 175
 176         return 0;
 177 }
 178
 179 /**
 180  *      p9100_blank - Optional function.  Blanks the display.
 181  *      @blank_mode: the blank mode we want.
 182  *      @info: frame buffer structure that represents a single frame buffer
 183  */
 184 static int
 185 p9100_blank(int blank, struct fb_info *info)
 186 {
 187         struct p9100_par *par = (struct p9100_par *) info->par;
 188         struct p9100_regs __iomem *regs = par->regs;
 189         unsigned long flags;
 190         u32 val;
 191
 192         spin_lock_irqsave(&par->lock, flags);
 193
 194         switch (blank) {
 195         case FB_BLANK_UNBLANK: /* Unblanking */
 196                 val = sbus_readl(&regs->vid_screenpaint_timectl1);
 197                 val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
 198                 sbus_writel(val, &regs->vid_screenpaint_timectl1);
 199                 par->flags &= ~P9100_FLAG_BLANKED;
 200                 break;
 201
 202         case FB_BLANK_NORMAL: /* Normal blanking */
 203         case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
 204         case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
 205         case FB_BLANK_POWERDOWN: /* Poweroff */
 206                 val = sbus_readl(&regs->vid_screenpaint_timectl1);
 207                 val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
 208                 sbus_writel(val, &regs->vid_screenpaint_timectl1);
 209                 par->flags |= P9100_FLAG_BLANKED;
 210                 break;
 211         }
 212
 213         spin_unlock_irqrestore(&par->lock, flags);
 214
 215         return 0;
 216 }
 217
 218 static struct sbus_mmap_map p9100_mmap_map[] = {
 219         { CG3_MMAP_OFFSET,      0,              SBUS_MMAP_FBSIZE(1) },
 220         { 0,                    0,              0                   }
 221 };
 222
 223 static int p9100_mmap(struct fb_info *info, struct vm_area_struct *vma)
 224 {
 225         struct p9100_par *par = (struct p9100_par *)info->par;
 226
 227         return sbusfb_mmap_helper(p9100_mmap_map,
 228                                   par->physbase, par->fbsize,
 229                                   par->which_io, vma);
 230 }
 231
 232 static int p9100_ioctl(struct fb_info *info, unsigned int cmd,
 233                        unsigned long arg)
 234 {
 235         struct p9100_par *par = (struct p9100_par *) info->par;
 236
 237         /* Make it look like a cg3. */
 238         return sbusfb_ioctl_helper(cmd, arg, info,
 239                                    FBTYPE_SUN3COLOR, 8, par->fbsize);
 240 }
 241
 242 /*
 243  *  Initialisation
 244  */
 245
 246 static void p9100_init_fix(struct fb_info *info, int linebytes, struct device_node *dp)
 247 {
 248         strlcpy(info->fix.id, dp->name, sizeof(info->fix.id));
 249
 250         info->fix.type = FB_TYPE_PACKED_PIXELS;
 251         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 252
 253         info->fix.line_length = linebytes;
 254
 255         info->fix.accel = FB_ACCEL_SUN_CGTHREE;
 256 }
 257
 258 static int __devinit p9100_probe(struct of_device *op, const struct of_device_id *match)
 259 {
 260         struct device_node *dp = op->node;
 261         struct fb_info *info;
 262         struct p9100_par *par;
 263         int linebytes, err;
 264
 265         info = framebuffer_alloc(sizeof(struct p9100_par), &op->dev);
 266
 267         err = -ENOMEM;
 268         if (!info)
 269                 goto out_err;
 270         par = info->par;
 271
 272         spin_lock_init(&par->lock);
 273
 274         /* This is the framebuffer and the only resource apps can mmap.  */
 275         par->physbase = op->resource[2].start;
 276         par->which_io = op->resource[2].flags & IORESOURCE_BITS;
 277
 278         sbusfb_fill_var(&info->var, dp->node, 8);
 279         info->var.red.length = 8;
 280         info->var.green.length = 8;
 281         info->var.blue.length = 8;
 282
 283         linebytes = of_getintprop_default(dp, "linebytes", info->var.xres);
 284         par->fbsize = PAGE_ALIGN(linebytes * info->var.yres);
 285
 286         par->regs = of_ioremap(&op->resource[0], 0,
 287                                sizeof(struct p9100_regs), "p9100 regs");
 288         if (!par->regs)
 289                 goto out_release_fb;
 290
 291         info->flags = FBINFO_DEFAULT;
 292         info->fbops = &p9100_ops;
 293         info->screen_base = of_ioremap(&op->resource[2], 0,
 294                                        par->fbsize, "p9100 ram");
 295         if (!info->screen_base)
 296                 goto out_unmap_regs;
 297
 298         p9100_blank(0, info);
 299
 300         if (fb_alloc_cmap(&info->cmap, 256, 0))
 301                 goto out_unmap_screen;
 302
 303         p9100_init_fix(info, linebytes, dp);
 304
 305         err = register_framebuffer(info);
 306         if (err < 0)
 307                 goto out_dealloc_cmap;
 308
 309         fb_set_cmap(&info->cmap, info);
 310
 311         dev_set_drvdata(&op->dev, info);
 312
 313         printk("%s: p9100 at %lx:%lx\n",
 314                dp->full_name,
 315                par->which_io, par->physbase);
 316
 317         return 0;
 318
 319 out_dealloc_cmap:
 320         fb_dealloc_cmap(&info->cmap);
 321
 322 out_unmap_screen:
 323         of_iounmap(&op->resource[2], info->screen_base, par->fbsize);
 324
 325 out_unmap_regs:
 326         of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));
 327
 328 out_release_fb:
 329         framebuffer_release(info);
 330
 331 out_err:
 332         return err;
 333 }
 334
 335 static int __devexit p9100_remove(struct of_device *op)
 336 {
 337         struct fb_info *info = dev_get_drvdata(&op->dev);
 338         struct p9100_par *par = info->par;
 339
 340         unregister_framebuffer(info);
 341         fb_dealloc_cmap(&info->cmap);
 342
 343         of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));
 344         of_iounmap(&op->resource[2], info->screen_base, par->fbsize);
 345
 346         framebuffer_release(info);
 347
 348         dev_set_drvdata(&op->dev, NULL);
 349
 350         return 0;
 351 }
 352
 353 static struct of_device_id p9100_match[] = {
 354         {
 355                 .name = "p9100",
 356         },
 357         {},
 358 };
 359 MODULE_DEVICE_TABLE(of, p9100_match);
 360
 361 static struct of_platform_driver p9100_driver = {
 362         .name           = "p9100",
 363         .match_table    = p9100_match,
 364         .probe          = p9100_probe,
 365         .remove         = __devexit_p(p9100_remove),
 366 };
 367
 368 static int __init p9100_init(void)
 369 {
 370         if (fb_get_options("p9100fb", NULL))
 371                 return -ENODEV;
 372
 373         return of_register_driver(&p9100_driver, &of_bus_type);
 374 }
 375
 376 static void __exit p9100_exit(void)
 377 {
 378         of_unregister_driver(&p9100_driver);
 379 }
 380
 381 module_init(p9100_init);
 382 module_exit(p9100_exit);
 383
 384 MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");
 385 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
 386 MODULE_VERSION("2.0");
 387 MODULE_LICENSE("GPL");