drivers/video/p9100.c

   1 /* p9100.c: P9100 frame buffer driver
   2  *
   3  * Copyright (C) 2003 David S. Miller (davem@redhat.com)
   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/sbus.h>
  21 #include <asm/oplib.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 file *, struct vm_area_struct *);
  35 static int p9100_ioctl(struct inode *, struct file *, unsigned int,
  36                        unsigned long, struct fb_info *);
  37
  38 /*
  39  *  Frame buffer operations
  40  */
  41
  42 static struct fb_ops p9100_ops = {
  43         .owner                  = THIS_MODULE,
  44         .fb_setcolreg           = p9100_setcolreg,
  45         .fb_blank               = p9100_blank,
  46         .fb_fillrect            = cfb_fillrect,
  47         .fb_copyarea            = cfb_copyarea,
  48         .fb_imageblit           = cfb_imageblit,
  49         .fb_mmap                = p9100_mmap,
  50         .fb_ioctl               = p9100_ioctl,
  51 #ifdef CONFIG_COMPAT
  52         .fb_compat_ioctl        = sbusfb_compat_ioctl,
  53 #endif
  54 };
  55
  56 /* P9100 control registers */
  57 #define P9100_SYSCTL_OFF        0x0UL
  58 #define P9100_VIDEOCTL_OFF      0x100UL
  59 #define P9100_VRAMCTL_OFF       0x180UL
  60 #define P9100_RAMDAC_OFF        0x200UL
  61 #define P9100_VIDEOCOPROC_OFF   0x400UL
  62
  63 /* P9100 command registers */
  64 #define P9100_CMD_OFF 0x0UL
  65
  66 /* P9100 framebuffer memory */
  67 #define P9100_FB_OFF 0x0UL
  68
  69 /* 3 bits: 2=8bpp 3=16bpp 5=32bpp 7=24bpp */
  70 #define SYS_CONFIG_PIXELSIZE_SHIFT 26
  71
  72 #define SCREENPAINT_TIMECTL1_ENABLE_VIDEO 0x20 /* 0 = off, 1 = on */
  73
  74 struct p9100_regs {
  75         /* Registers for the system control */
  76         volatile u32 sys_base;
  77         volatile u32 sys_config;
  78         volatile u32 sys_intr;
  79         volatile u32 sys_int_ena;
  80         volatile u32 sys_alt_rd;
  81         volatile u32 sys_alt_wr;
  82         volatile u32 sys_xxx[58];
  83
  84         /* Registers for the video control */
  85         volatile u32 vid_base;
  86         volatile u32 vid_hcnt;
  87         volatile u32 vid_htotal;
  88         volatile u32 vid_hsync_rise;
  89         volatile u32 vid_hblank_rise;
  90         volatile u32 vid_hblank_fall;
  91         volatile u32 vid_hcnt_preload;
  92         volatile u32 vid_vcnt;
  93         volatile u32 vid_vlen;
  94         volatile u32 vid_vsync_rise;
  95         volatile u32 vid_vblank_rise;
  96         volatile u32 vid_vblank_fall;
  97         volatile u32 vid_vcnt_preload;
  98         volatile u32 vid_screenpaint_addr;
  99         volatile u32 vid_screenpaint_timectl1;
 100         volatile u32 vid_screenpaint_qsfcnt;
 101         volatile u32 vid_screenpaint_timectl2;
 102         volatile u32 vid_xxx[15];
 103
 104         /* Registers for the video control */
 105         volatile u32 vram_base;
 106         volatile u32 vram_memcfg;
 107         volatile u32 vram_refresh_pd;
 108         volatile u32 vram_refresh_cnt;
 109         volatile u32 vram_raslo_max;
 110         volatile u32 vram_raslo_cur;
 111         volatile u32 pwrup_cfg;
 112         volatile u32 vram_xxx[25];
 113
 114         /* Registers for IBM RGB528 Palette */
 115         volatile u32 ramdac_cmap_wridx;
 116         volatile u32 ramdac_palette_data;
 117         volatile u32 ramdac_pixel_mask;
 118         volatile u32 ramdac_palette_rdaddr;
 119         volatile u32 ramdac_idx_lo;
 120         volatile u32 ramdac_idx_hi;
 121         volatile u32 ramdac_idx_data;
 122         volatile u32 ramdac_idx_ctl;
 123         volatile u32 ramdac_xxx[1784];
 124 };
 125
 126 struct p9100_cmd_parameng {
 127         volatile u32 parameng_status;
 128         volatile u32 parameng_bltcmd;
 129         volatile u32 parameng_quadcmd;
 130 };
 131
 132 struct p9100_par {
 133         spinlock_t              lock;
 134         struct p9100_regs       __iomem *regs;
 135
 136         u32                     flags;
 137 #define P9100_FLAG_BLANKED      0x00000001
 138
 139         unsigned long           physbase;
 140         unsigned long           fbsize;
 141
 142         struct sbus_dev         *sdev;
 143         struct list_head        list;
 144 };
 145
 146 /**
 147  *      p9100_setcolreg - Optional function. Sets a color register.
 148  *      @regno: boolean, 0 copy local, 1 get_user() function
 149  *      @red: frame buffer colormap structure
 150  *      @green: The green value which can be up to 16 bits wide
 151  *      @blue:  The blue value which can be up to 16 bits wide.
 152  *      @transp: If supported the alpha value which can be up to 16 bits wide.
 153  *      @info: frame buffer info structure
 154  */
 155 static int p9100_setcolreg(unsigned regno,
 156                            unsigned red, unsigned green, unsigned blue,
 157                            unsigned transp, struct fb_info *info)
 158 {
 159         struct p9100_par *par = (struct p9100_par *) info->par;
 160         struct p9100_regs __iomem *regs = par->regs;
 161         unsigned long flags;
 162
 163         if (regno >= 256)
 164                 return 1;
 165
 166         red >>= 8;
 167         green >>= 8;
 168         blue >>= 8;
 169
 170         spin_lock_irqsave(&par->lock, flags);
 171
 172         sbus_writel((regno << 16), &regs->ramdac_cmap_wridx);
 173         sbus_writel((red << 16), &regs->ramdac_palette_data);
 174         sbus_writel((green << 16), &regs->ramdac_palette_data);
 175         sbus_writel((blue << 16), &regs->ramdac_palette_data);
 176
 177         spin_unlock_irqrestore(&par->lock, flags);
 178
 179         return 0;
 180 }
 181
 182 /**
 183  *      p9100_blank - Optional function.  Blanks the display.
 184  *      @blank_mode: the blank mode we want.
 185  *      @info: frame buffer structure that represents a single frame buffer
 186  */
 187 static int
 188 p9100_blank(int blank, struct fb_info *info)
 189 {
 190         struct p9100_par *par = (struct p9100_par *) info->par;
 191         struct p9100_regs __iomem *regs = par->regs;
 192         unsigned long flags;
 193         u32 val;
 194
 195         spin_lock_irqsave(&par->lock, flags);
 196
 197         switch (blank) {
 198         case FB_BLANK_UNBLANK: /* Unblanking */
 199                 val = sbus_readl(&regs->vid_screenpaint_timectl1);
 200                 val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
 201                 sbus_writel(val, &regs->vid_screenpaint_timectl1);
 202                 par->flags &= ~P9100_FLAG_BLANKED;
 203                 break;
 204
 205         case FB_BLANK_NORMAL: /* Normal blanking */
 206         case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
 207         case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
 208         case FB_BLANK_POWERDOWN: /* Poweroff */
 209                 val = sbus_readl(&regs->vid_screenpaint_timectl1);
 210                 val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
 211                 sbus_writel(val, &regs->vid_screenpaint_timectl1);
 212                 par->flags |= P9100_FLAG_BLANKED;
 213                 break;
 214         }
 215
 216         spin_unlock_irqrestore(&par->lock, flags);
 217
 218         return 0;
 219 }
 220
 221 static struct sbus_mmap_map p9100_mmap_map[] = {
 222         { CG3_MMAP_OFFSET,      0,              SBUS_MMAP_FBSIZE(1) },
 223         { 0,                    0,              0                   }
 224 };
 225
 226 static int p9100_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma)
 227 {
 228         struct p9100_par *par = (struct p9100_par *)info->par;
 229
 230         return sbusfb_mmap_helper(p9100_mmap_map,
 231                                   par->physbase, par->fbsize,
 232                                   par->sdev->reg_addrs[0].which_io,
 233                                   vma);
 234 }
 235
 236 static int p9100_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 237                        unsigned long arg, struct fb_info *info)
 238 {
 239         struct p9100_par *par = (struct p9100_par *) info->par;
 240
 241         /* Make it look like a cg3. */
 242         return sbusfb_ioctl_helper(cmd, arg, info,
 243                                    FBTYPE_SUN3COLOR, 8, par->fbsize);
 244 }
 245
 246 /*
 247  *  Initialisation
 248  */
 249
 250 static void
 251 p9100_init_fix(struct fb_info *info, int linebytes)
 252 {
 253         struct p9100_par *par = (struct p9100_par *)info->par;
 254
 255         strlcpy(info->fix.id, par->sdev->prom_name, sizeof(info->fix.id));
 256
 257         info->fix.type = FB_TYPE_PACKED_PIXELS;
 258         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 259
 260         info->fix.line_length = linebytes;
 261
 262         info->fix.accel = FB_ACCEL_SUN_CGTHREE;
 263 }
 264
 265 struct all_info {
 266         struct fb_info info;
 267         struct p9100_par par;
 268         struct list_head list;
 269 };
 270 static LIST_HEAD(p9100_list);
 271
 272 static void p9100_init_one(struct sbus_dev *sdev)
 273 {
 274         struct all_info *all;
 275         int linebytes;
 276
 277         all = kmalloc(sizeof(*all), GFP_KERNEL);
 278         if (!all) {
 279                 printk(KERN_ERR "p9100: Cannot allocate memory.\n");
 280                 return;
 281         }
 282         memset(all, 0, sizeof(*all));
 283
 284         INIT_LIST_HEAD(&all->list);
 285
 286         spin_lock_init(&all->par.lock);
 287         all->par.sdev = sdev;
 288
 289         /* This is the framebuffer and the only resource apps can mmap.  */
 290         all->par.physbase = sdev->reg_addrs[2].phys_addr;
 291
 292         sbusfb_fill_var(&all->info.var, sdev->prom_node, 8);
 293         all->info.var.red.length = 8;
 294         all->info.var.green.length = 8;
 295         all->info.var.blue.length = 8;
 296
 297         linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
 298                                        all->info.var.xres);
 299         all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
 300
 301         all->par.regs = sbus_ioremap(&sdev->resource[0], 0,
 302                              sizeof(struct p9100_regs), "p9100 regs");
 303
 304         all->info.flags = FBINFO_DEFAULT;
 305         all->info.fbops = &p9100_ops;
 306 #ifdef CONFIG_SPARC32
 307         all->info.screen_base = (char __iomem *)
 308                 prom_getintdefault(sdev->prom_node, "address", 0);
 309 #endif
 310         if (!all->info.screen_base)
 311                 all->info.screen_base = sbus_ioremap(&sdev->resource[2], 0,
 312                                      all->par.fbsize, "p9100 ram");
 313         all->info.par = &all->par;
 314
 315         p9100_blank(0, &all->info);
 316
 317         if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
 318                 printk(KERN_ERR "p9100: Could not allocate color map.\n");
 319                 kfree(all);
 320                 return;
 321         }
 322
 323         p9100_init_fix(&all->info, linebytes);
 324
 325         if (register_framebuffer(&all->info) < 0) {
 326                 printk(KERN_ERR "p9100: Could not register framebuffer.\n");
 327                 fb_dealloc_cmap(&all->info.cmap);
 328                 kfree(all);
 329                 return;
 330         }
 331         fb_set_cmap(&all->info.cmap, &all->info);
 332
 333         list_add(&all->list, &p9100_list);
 334
 335         printk("p9100: %s at %lx:%lx\n",
 336                sdev->prom_name,
 337                (long) sdev->reg_addrs[0].which_io,
 338                (long) sdev->reg_addrs[0].phys_addr);
 339 }
 340
 341 int __init p9100_init(void)
 342 {
 343         struct sbus_bus *sbus;
 344         struct sbus_dev *sdev;
 345
 346         if (fb_get_options("p9100fb", NULL))
 347                 return -ENODEV;
 348
 349         for_all_sbusdev(sdev, sbus) {
 350                 if (!strcmp(sdev->prom_name, "p9100"))
 351                         p9100_init_one(sdev);
 352         }
 353
 354         return 0;
 355 }
 356
 357 void __exit p9100_exit(void)
 358 {
 359         struct list_head *pos, *tmp;
 360
 361         list_for_each_safe(pos, tmp, &p9100_list) {
 362                 struct all_info *all = list_entry(pos, typeof(*all), list);
 363
 364                 unregister_framebuffer(&all->info);
 365                 fb_dealloc_cmap(&all->info.cmap);
 366                 kfree(all);
 367         }
 368 }
 369
 370 int __init
 371 p9100_setup(char *arg)
 372 {
 373         /* No cmdline options yet... */
 374         return 0;
 375 }
 376
 377 module_init(p9100_init);
 378
 379 #ifdef MODULE
 380 module_exit(p9100_exit);
 381 #endif
 382
 383 MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");
 384 MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
 385 MODULE_LICENSE("GPL");