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