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