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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 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 };
  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         volatile u32 sys_base;
  74         volatile u32 sys_config;
  75         volatile u32 sys_intr;
  76         volatile u32 sys_int_ena;
  77         volatile u32 sys_alt_rd;
  78         volatile u32 sys_alt_wr;
  79         volatile u32 sys_xxx[58];
  80
  81         /* Registers for the video control */
  82         volatile u32 vid_base;
  83         volatile u32 vid_hcnt;
  84         volatile u32 vid_htotal;
  85         volatile u32 vid_hsync_rise;
  86         volatile u32 vid_hblank_rise;
  87         volatile u32 vid_hblank_fall;
  88         volatile u32 vid_hcnt_preload;
  89         volatile u32 vid_vcnt;
  90         volatile u32 vid_vlen;
  91         volatile u32 vid_vsync_rise;
  92         volatile u32 vid_vblank_rise;
  93         volatile u32 vid_vblank_fall;
  94         volatile u32 vid_vcnt_preload;
  95         volatile u32 vid_screenpaint_addr;
  96         volatile u32 vid_screenpaint_timectl1;
  97         volatile u32 vid_screenpaint_qsfcnt;
  98         volatile u32 vid_screenpaint_timectl2;
  99         volatile u32 vid_xxx[15];
 100
 101         /* Registers for the video control */
 102         volatile u32 vram_base;
 103         volatile u32 vram_memcfg;
 104         volatile u32 vram_refresh_pd;
 105         volatile u32 vram_refresh_cnt;
 106         volatile u32 vram_raslo_max;
 107         volatile u32 vram_raslo_cur;
 108         volatile u32 pwrup_cfg;
 109         volatile u32 vram_xxx[25];
 110
 111         /* Registers for IBM RGB528 Palette */
 112         volatile u32 ramdac_cmap_wridx;
 113         volatile u32 ramdac_palette_data;
 114         volatile u32 ramdac_pixel_mask;
 115         volatile u32 ramdac_palette_rdaddr;
 116         volatile u32 ramdac_idx_lo;
 117         volatile u32 ramdac_idx_hi;
 118         volatile u32 ramdac_idx_data;
 119         volatile u32 ramdac_idx_ctl;
 120         volatile u32 ramdac_xxx[1784];
 121 };
 122
 123 struct p9100_cmd_parameng {
 124         volatile u32 parameng_status;
 125         volatile u32 parameng_bltcmd;
 126         volatile 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           physbase;
 137         unsigned long           fbsize;
 138
 139         struct sbus_dev         *sdev;
 140         struct list_head        list;
 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 file *file, 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->sdev->reg_addrs[0].which_io,
 230                                   vma);
 231 }
 232
 233 static int p9100_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 234                        unsigned long arg, struct fb_info *info)
 235 {
 236         struct p9100_par *par = (struct p9100_par *) info->par;
 237
 238         /* Make it look like a cg3. */
 239         return sbusfb_ioctl_helper(cmd, arg, info,
 240                                    FBTYPE_SUN3COLOR, 8, par->fbsize);
 241 }
 242
 243 /*
 244  *  Initialisation
 245  */
 246
 247 static void
 248 p9100_init_fix(struct fb_info *info, int linebytes)
 249 {
 250         struct p9100_par *par = (struct p9100_par *)info->par;
 251
 252         strlcpy(info->fix.id, par->sdev->prom_name, sizeof(info->fix.id));
 253
 254         info->fix.type = FB_TYPE_PACKED_PIXELS;
 255         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 256
 257         info->fix.line_length = linebytes;
 258
 259         info->fix.accel = FB_ACCEL_SUN_CGTHREE;
 260 }
 261
 262 struct all_info {
 263         struct fb_info info;
 264         struct p9100_par par;
 265         struct list_head list;
 266 };
 267 static LIST_HEAD(p9100_list);
 268
 269 static void p9100_init_one(struct sbus_dev *sdev)
 270 {
 271         struct all_info *all;
 272         int linebytes;
 273
 274         all = kmalloc(sizeof(*all), GFP_KERNEL);
 275         if (!all) {
 276                 printk(KERN_ERR "p9100: Cannot allocate memory.\n");
 277                 return;
 278         }
 279         memset(all, 0, sizeof(*all));
 280
 281         INIT_LIST_HEAD(&all->list);
 282
 283         spin_lock_init(&all->par.lock);
 284         all->par.sdev = sdev;
 285
 286         /* This is the framebuffer and the only resource apps can mmap.  */
 287         all->par.physbase = sdev->reg_addrs[2].phys_addr;
 288
 289         sbusfb_fill_var(&all->info.var, sdev->prom_node, 8);
 290         all->info.var.red.length = 8;
 291         all->info.var.green.length = 8;
 292         all->info.var.blue.length = 8;
 293
 294         linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
 295                                        all->info.var.xres);
 296         all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
 297
 298         all->par.regs = sbus_ioremap(&sdev->resource[0], 0,
 299                              sizeof(struct p9100_regs), "p9100 regs");
 300
 301         all->info.flags = FBINFO_DEFAULT;
 302         all->info.fbops = &p9100_ops;
 303 #ifdef CONFIG_SPARC32
 304         all->info.screen_base = (char __iomem *)
 305                 prom_getintdefault(sdev->prom_node, "address", 0);
 306 #endif
 307         if (!all->info.screen_base)
 308                 all->info.screen_base = sbus_ioremap(&sdev->resource[2], 0,
 309                                      all->par.fbsize, "p9100 ram");
 310         all->info.par = &all->par;
 311
 312         p9100_blank(0, &all->info);
 313
 314         if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
 315                 printk(KERN_ERR "p9100: Could not allocate color map.\n");
 316                 kfree(all);
 317                 return;
 318         }
 319
 320         p9100_init_fix(&all->info, linebytes);
 321
 322         if (register_framebuffer(&all->info) < 0) {
 323                 printk(KERN_ERR "p9100: Could not register framebuffer.\n");
 324                 fb_dealloc_cmap(&all->info.cmap);
 325                 kfree(all);
 326                 return;
 327         }
 328         fb_set_cmap(&all->info.cmap, &all->info);
 329
 330         list_add(&all->list, &p9100_list);
 331
 332         printk("p9100: %s at %lx:%lx\n",
 333                sdev->prom_name,
 334                (long) sdev->reg_addrs[0].which_io,
 335                (long) sdev->reg_addrs[0].phys_addr);
 336 }
 337
 338 int __init p9100_init(void)
 339 {
 340         struct sbus_bus *sbus;
 341         struct sbus_dev *sdev;
 342
 343         if (fb_get_options("p9100fb", NULL))
 344                 return -ENODEV;
 345
 346         for_all_sbusdev(sdev, sbus) {
 347                 if (!strcmp(sdev->prom_name, "p9100"))
 348                         p9100_init_one(sdev);
 349         }
 350
 351         return 0;
 352 }
 353
 354 void __exit p9100_exit(void)
 355 {
 356         struct list_head *pos, *tmp;
 357
 358         list_for_each_safe(pos, tmp, &p9100_list) {
 359                 struct all_info *all = list_entry(pos, typeof(*all), list);
 360
 361                 unregister_framebuffer(&all->info);
 362                 fb_dealloc_cmap(&all->info.cmap);
 363                 kfree(all);
 364         }
 365 }
 366
 367 int __init
 368 p9100_setup(char *arg)
 369 {
 370         /* No cmdline options yet... */
 371         return 0;
 372 }
 373
 374 module_init(p9100_init);
 375
 376 #ifdef MODULE
 377 module_exit(p9100_exit);
 378 #endif
 379
 380 MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");
 381 MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
 382 MODULE_LICENSE("GPL");