drivers/video/chipsfb.c

   1 /*
   2  *  drivers/video/chipsfb.c -- frame buffer device for
   3  *  Chips & Technologies 65550 chip.
   4  *
   5  *  Copyright (C) 1998-2002 Paul Mackerras
   6  *
   7  *  This file is derived from the Powermac "chips" driver:
   8  *  Copyright (C) 1997 Fabio Riccardi.
   9  *  And from the frame buffer device for Open Firmware-initialized devices:
  10  *  Copyright (C) 1997 Geert Uytterhoeven.
  11  *
  12  *  This file is subject to the terms and conditions of the GNU General Public
  13  *  License. See the file COPYING in the main directory of this archive for
  14  *  more details.
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/kernel.h>
  19 #include <linux/errno.h>
  20 #include <linux/string.h>
  21 #include <linux/mm.h>
  22 #include <linux/slab.h>
  23 #include <linux/vmalloc.h>
  24 #include <linux/delay.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/fb.h>
  27 #include <linux/pm.h>
  28 #include <linux/init.h>
  29 #include <linux/pci.h>
  30 #include <linux/console.h>
  31 #include <asm/io.h>
  32
  33 #ifdef CONFIG_PMAC_BACKLIGHT
  34 #include <asm/backlight.h>
  35 #endif
  36
  37 /*
  38  * Since we access the display with inb/outb to fixed port numbers,
  39  * we can only handle one 6555x chip.  -- paulus
  40  */
  41 #define write_ind(num, val, ap, dp)     do { \
  42         outb((num), (ap)); outb((val), (dp)); \
  43 } while (0)
  44 #define read_ind(num, var, ap, dp)      do { \
  45         outb((num), (ap)); var = inb((dp)); \
  46 } while (0)
  47
  48 /* extension registers */
  49 #define write_xr(num, val)      write_ind(num, val, 0x3d6, 0x3d7)
  50 #define read_xr(num, var)       read_ind(num, var, 0x3d6, 0x3d7)
  51 /* flat panel registers */
  52 #define write_fr(num, val)      write_ind(num, val, 0x3d0, 0x3d1)
  53 #define read_fr(num, var)       read_ind(num, var, 0x3d0, 0x3d1)
  54 /* CRTC registers */
  55 #define write_cr(num, val)      write_ind(num, val, 0x3d4, 0x3d5)
  56 #define read_cr(num, var)       read_ind(num, var, 0x3d4, 0x3d5)
  57 /* graphics registers */
  58 #define write_gr(num, val)      write_ind(num, val, 0x3ce, 0x3cf)
  59 #define read_gr(num, var)       read_ind(num, var, 0x3ce, 0x3cf)
  60 /* sequencer registers */
  61 #define write_sr(num, val)      write_ind(num, val, 0x3c4, 0x3c5)
  62 #define read_sr(num, var)       read_ind(num, var, 0x3c4, 0x3c5)
  63 /* attribute registers - slightly strange */
  64 #define write_ar(num, val)      do { \
  65         inb(0x3da); write_ind(num, val, 0x3c0, 0x3c0); \
  66 } while (0)
  67 #define read_ar(num, var)       do { \
  68         inb(0x3da); read_ind(num, var, 0x3c0, 0x3c1); \
  69 } while (0)
  70
  71 /*
  72  * Exported functions
  73  */
  74 int chips_init(void);
  75
  76 static int chipsfb_pci_init(struct pci_dev *dp, const struct pci_device_id *);
  77 static int chipsfb_check_var(struct fb_var_screeninfo *var,
  78                              struct fb_info *info);
  79 static int chipsfb_set_par(struct fb_info *info);
  80 static int chipsfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  81                              u_int transp, struct fb_info *info);
  82 static int chipsfb_blank(int blank, struct fb_info *info);
  83
  84 static struct fb_ops chipsfb_ops = {
  85         .owner          = THIS_MODULE,
  86         .fb_check_var   = chipsfb_check_var,
  87         .fb_set_par     = chipsfb_set_par,
  88         .fb_setcolreg   = chipsfb_setcolreg,
  89         .fb_blank       = chipsfb_blank,
  90         .fb_fillrect    = cfb_fillrect,
  91         .fb_copyarea    = cfb_copyarea,
  92         .fb_imageblit   = cfb_imageblit,
  93 };
  94
  95 static int chipsfb_check_var(struct fb_var_screeninfo *var,
  96                              struct fb_info *info)
  97 {
  98         if (var->xres > 800 || var->yres > 600
  99             || var->xres_virtual > 800 || var->yres_virtual > 600
 100             || (var->bits_per_pixel != 8 && var->bits_per_pixel != 16)
 101             || var->nonstd
 102             || (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
 103                 return -EINVAL;
 104
 105         var->xres = var->xres_virtual = 800;
 106         var->yres = var->yres_virtual = 600;
 107
 108         return 0;
 109 }
 110
 111 static int chipsfb_set_par(struct fb_info *info)
 112 {
 113         if (info->var.bits_per_pixel == 16) {
 114                 write_cr(0x13, 200);            // Set line length (doublewords)
 115                 write_xr(0x81, 0x14);           // 15 bit (555) color mode
 116                 write_xr(0x82, 0x00);           // Disable palettes
 117                 write_xr(0x20, 0x10);           // 16 bit blitter mode
 118
 119                 info->fix.line_length = 800*2;
 120                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 121
 122                 info->var.red.offset = 10;
 123                 info->var.green.offset = 5;
 124                 info->var.blue.offset = 0;
 125                 info->var.red.length = info->var.green.length =
 126                         info->var.blue.length = 5;
 127
 128         } else {
 129                 /* p->var.bits_per_pixel == 8 */
 130                 write_cr(0x13, 100);            // Set line length (doublewords)
 131                 write_xr(0x81, 0x12);           // 8 bit color mode
 132                 write_xr(0x82, 0x08);           // Graphics gamma enable
 133                 write_xr(0x20, 0x00);           // 8 bit blitter mode
 134
 135                 info->fix.line_length = 800;
 136                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 137
 138                 info->var.red.offset = info->var.green.offset =
 139                         info->var.blue.offset = 0;
 140                 info->var.red.length = info->var.green.length =
 141                         info->var.blue.length = 8;
 142
 143         }
 144         return 0;
 145 }
 146
 147 static int chipsfb_blank(int blank, struct fb_info *info)
 148 {
 149         return 1;       /* get fb_blank to set the colormap to all black */
 150 }
 151
 152 static int chipsfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 153                              u_int transp, struct fb_info *info)
 154 {
 155         if (regno > 255)
 156                 return 1;
 157         red >>= 8;
 158         green >>= 8;
 159         blue >>= 8;
 160         outb(regno, 0x3c8);
 161         udelay(1);
 162         outb(red, 0x3c9);
 163         outb(green, 0x3c9);
 164         outb(blue, 0x3c9);
 165
 166         return 0;
 167 }
 168
 169 struct chips_init_reg {
 170         unsigned char addr;
 171         unsigned char data;
 172 };
 173
 174 static struct chips_init_reg chips_init_sr[] = {
 175         { 0x00, 0x03 },
 176         { 0x01, 0x01 },
 177         { 0x02, 0x0f },
 178         { 0x04, 0x0e }
 179 };
 180
 181 static struct chips_init_reg chips_init_gr[] = {
 182         { 0x05, 0x00 },
 183         { 0x06, 0x0d },
 184         { 0x08, 0xff }
 185 };
 186
 187 static struct chips_init_reg chips_init_ar[] = {
 188         { 0x10, 0x01 },
 189         { 0x12, 0x0f },
 190         { 0x13, 0x00 }
 191 };
 192
 193 static struct chips_init_reg chips_init_cr[] = {
 194         { 0x00, 0x7f },
 195         { 0x01, 0x63 },
 196         { 0x02, 0x63 },
 197         { 0x03, 0x83 },
 198         { 0x04, 0x66 },
 199         { 0x05, 0x10 },
 200         { 0x06, 0x72 },
 201         { 0x07, 0x3e },
 202         { 0x08, 0x00 },
 203         { 0x09, 0x40 },
 204         { 0x0c, 0x00 },
 205         { 0x0d, 0x00 },
 206         { 0x10, 0x59 },
 207         { 0x11, 0x0d },
 208         { 0x12, 0x57 },
 209         { 0x13, 0x64 },
 210         { 0x14, 0x00 },
 211         { 0x15, 0x57 },
 212         { 0x16, 0x73 },
 213         { 0x17, 0xe3 },
 214         { 0x18, 0xff },
 215         { 0x30, 0x02 },
 216         { 0x31, 0x02 },
 217         { 0x32, 0x02 },
 218         { 0x33, 0x02 },
 219         { 0x40, 0x00 },
 220         { 0x41, 0x00 },
 221         { 0x40, 0x80 }
 222 };
 223
 224 static struct chips_init_reg chips_init_fr[] = {
 225         { 0x01, 0x02 },
 226         { 0x03, 0x08 },
 227         { 0x04, 0x81 },
 228         { 0x05, 0x21 },
 229         { 0x08, 0x0c },
 230         { 0x0a, 0x74 },
 231         { 0x0b, 0x11 },
 232         { 0x10, 0x0c },
 233         { 0x11, 0xe0 },
 234         /* { 0x12, 0x40 }, -- 3400 needs 40, 2400 needs 48, no way to tell */
 235         { 0x20, 0x63 },
 236         { 0x21, 0x68 },
 237         { 0x22, 0x19 },
 238         { 0x23, 0x7f },
 239         { 0x24, 0x68 },
 240         { 0x26, 0x00 },
 241         { 0x27, 0x0f },
 242         { 0x30, 0x57 },
 243         { 0x31, 0x58 },
 244         { 0x32, 0x0d },
 245         { 0x33, 0x72 },
 246         { 0x34, 0x02 },
 247         { 0x35, 0x22 },
 248         { 0x36, 0x02 },
 249         { 0x37, 0x00 }
 250 };
 251
 252 static struct chips_init_reg chips_init_xr[] = {
 253         { 0xce, 0x00 },         /* set default memory clock */
 254         { 0xcc, 0x43 },         /* memory clock ratio */
 255         { 0xcd, 0x18 },
 256         { 0xce, 0xa1 },
 257         { 0xc8, 0x84 },
 258         { 0xc9, 0x0a },
 259         { 0xca, 0x00 },
 260         { 0xcb, 0x20 },
 261         { 0xcf, 0x06 },
 262         { 0xd0, 0x0e },
 263         { 0x09, 0x01 },
 264         { 0x0a, 0x02 },
 265         { 0x0b, 0x01 },
 266         { 0x20, 0x00 },
 267         { 0x40, 0x03 },
 268         { 0x41, 0x01 },
 269         { 0x42, 0x00 },
 270         { 0x80, 0x82 },
 271         { 0x81, 0x12 },
 272         { 0x82, 0x08 },
 273         { 0xa0, 0x00 },
 274         { 0xa8, 0x00 }
 275 };
 276
 277 static void __init chips_hw_init(void)
 278 {
 279         int i;
 280
 281         for (i = 0; i < ARRAY_SIZE(chips_init_xr); ++i)
 282                 write_xr(chips_init_xr[i].addr, chips_init_xr[i].data);
 283         outb(0x29, 0x3c2); /* set misc output reg */
 284         for (i = 0; i < ARRAY_SIZE(chips_init_sr); ++i)
 285                 write_sr(chips_init_sr[i].addr, chips_init_sr[i].data);
 286         for (i = 0; i < ARRAY_SIZE(chips_init_gr); ++i)
 287                 write_gr(chips_init_gr[i].addr, chips_init_gr[i].data);
 288         for (i = 0; i < ARRAY_SIZE(chips_init_ar); ++i)
 289                 write_ar(chips_init_ar[i].addr, chips_init_ar[i].data);
 290         for (i = 0; i < ARRAY_SIZE(chips_init_cr); ++i)
 291                 write_cr(chips_init_cr[i].addr, chips_init_cr[i].data);
 292         for (i = 0; i < ARRAY_SIZE(chips_init_fr); ++i)
 293                 write_fr(chips_init_fr[i].addr, chips_init_fr[i].data);
 294 }
 295
 296 static struct fb_fix_screeninfo chipsfb_fix __devinitdata = {
 297         .id =           "C&T 65550",
 298         .type =         FB_TYPE_PACKED_PIXELS,
 299         .visual =       FB_VISUAL_PSEUDOCOLOR,
 300         .accel =        FB_ACCEL_NONE,
 301         .line_length =  800,
 302
 303 // FIXME: Assumes 1MB frame buffer, but 65550 supports 1MB or 2MB.
 304 // * "3500" PowerBook G3 (the original PB G3) has 2MB.
 305 // * 2400 has 1MB composed of 2 Mitsubishi M5M4V4265CTP DRAM chips.
 306 //   Motherboard actually supports 2MB -- there are two blank locations
 307 //   for a second pair of DRAMs.  (Thanks, Apple!)
 308 // * 3400 has 1MB (I think).  Don't know if it's expandable.
 309 // -- Tim Seufert
 310         .smem_len =     0x100000,       /* 1MB */
 311 };
 312
 313 static struct fb_var_screeninfo chipsfb_var __devinitdata = {
 314         .xres = 800,
 315         .yres = 600,
 316         .xres_virtual = 800,
 317         .yres_virtual = 600,
 318         .bits_per_pixel = 8,
 319         .red = { .length = 8 },
 320         .green = { .length = 8 },
 321         .blue = { .length = 8 },
 322         .height = -1,
 323         .width = -1,
 324         .vmode = FB_VMODE_NONINTERLACED,
 325         .pixclock = 10000,
 326         .left_margin = 16,
 327         .right_margin = 16,
 328         .upper_margin = 16,
 329         .lower_margin = 16,
 330         .hsync_len = 8,
 331         .vsync_len = 8,
 332 };
 333
 334 static void __devinit init_chips(struct fb_info *p, unsigned long addr)
 335 {
 336         memset(p->screen_base, 0, 0x100000);
 337
 338         p->fix = chipsfb_fix;
 339         p->fix.smem_start = addr;
 340
 341         p->var = chipsfb_var;
 342
 343         p->fbops = &chipsfb_ops;
 344         p->flags = FBINFO_DEFAULT;
 345
 346         fb_alloc_cmap(&p->cmap, 256, 0);
 347
 348         chips_hw_init();
 349 }
 350
 351 static int __devinit
 352 chipsfb_pci_init(struct pci_dev *dp, const struct pci_device_id *ent)
 353 {
 354         struct fb_info *p;
 355         unsigned long addr, size;
 356         unsigned short cmd;
 357         int rc = -ENODEV;
 358
 359         if (pci_enable_device(dp) < 0) {
 360                 dev_err(&dp->dev, "Cannot enable PCI device\n");
 361                 goto err_out;
 362         }
 363
 364         if ((dp->resource[0].flags & IORESOURCE_MEM) == 0)
 365                 goto err_disable;
 366         addr = pci_resource_start(dp, 0);
 367         size = pci_resource_len(dp, 0);
 368         if (addr == 0)
 369                 goto err_disable;
 370
 371         p = framebuffer_alloc(0, &dp->dev);
 372         if (p == NULL) {
 373                 dev_err(&dp->dev, "Cannot allocate framebuffer structure\n");
 374                 rc = -ENOMEM;
 375                 goto err_disable;
 376         }
 377
 378         if (pci_request_region(dp, 0, "chipsfb") != 0) {
 379                 dev_err(&dp->dev, "Cannot request framebuffer\n");
 380                 rc = -EBUSY;
 381                 goto err_release_fb;
 382         }
 383
 384 #ifdef __BIG_ENDIAN
 385         addr += 0x800000;       // Use big-endian aperture
 386 #endif
 387
 388         /* we should use pci_enable_device here, but,
 389            the device doesn't declare its I/O ports in its BARs
 390            so pci_enable_device won't turn on I/O responses */
 391         pci_read_config_word(dp, PCI_COMMAND, &cmd);
 392         cmd |= 3;       /* enable memory and IO space */
 393         pci_write_config_word(dp, PCI_COMMAND, cmd);
 394
 395 #ifdef CONFIG_PMAC_BACKLIGHT
 396         /* turn on the backlight */
 397         mutex_lock(&pmac_backlight_mutex);
 398         if (pmac_backlight) {
 399                 pmac_backlight->props.power = FB_BLANK_UNBLANK;
 400                 backlight_update_status(pmac_backlight);
 401         }
 402         mutex_unlock(&pmac_backlight_mutex);
 403 #endif /* CONFIG_PMAC_BACKLIGHT */
 404
 405 #ifdef CONFIG_PPC
 406         p->screen_base = __ioremap(addr, 0x200000, _PAGE_NO_CACHE);
 407 #else
 408         p->screen_base = ioremap(addr, 0x200000);
 409 #endif
 410         if (p->screen_base == NULL) {
 411                 dev_err(&dp->dev, "Cannot map framebuffer\n");
 412                 rc = -ENOMEM;
 413                 goto err_release_pci;
 414         }
 415
 416         pci_set_drvdata(dp, p);
 417         p->device = &dp->dev;
 418
 419         init_chips(p, addr);
 420
 421         if (register_framebuffer(p) < 0) {
 422                 dev_err(&dp->dev,"C&T 65550 framebuffer failed to register\n");
 423                 goto err_unmap;
 424         }
 425
 426         dev_info(&dp->dev,"fb%d: Chips 65550 frame buffer"
 427                  " (%dK RAM detected)\n",
 428                  p->node, p->fix.smem_len / 1024);
 429
 430         return 0;
 431
 432  err_unmap:
 433         iounmap(p->screen_base);
 434  err_release_pci:
 435         pci_release_region(dp, 0);
 436  err_release_fb:
 437         framebuffer_release(p);
 438  err_disable:
 439  err_out:
 440         return rc;
 441 }
 442
 443 static void __devexit chipsfb_remove(struct pci_dev *dp)
 444 {
 445         struct fb_info *p = pci_get_drvdata(dp);
 446
 447         if (p->screen_base == NULL)
 448                 return;
 449         unregister_framebuffer(p);
 450         iounmap(p->screen_base);
 451         p->screen_base = NULL;
 452         pci_release_region(dp, 0);
 453 }
 454
 455 #ifdef CONFIG_PM
 456 static int chipsfb_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 457 {
 458         struct fb_info *p = pci_get_drvdata(pdev);
 459
 460         if (state.event == pdev->dev.power.power_state.event)
 461                 return 0;
 462         if (state.event != PM_EVENT_SUSPEND)
 463                 goto done;
 464
 465         acquire_console_sem();
 466         chipsfb_blank(1, p);
 467         fb_set_suspend(p, 1);
 468         release_console_sem();
 469  done:
 470         pdev->dev.power.power_state = state;
 471         return 0;
 472 }
 473
 474 static int chipsfb_pci_resume(struct pci_dev *pdev)
 475 {
 476         struct fb_info *p = pci_get_drvdata(pdev);
 477
 478         acquire_console_sem();
 479         fb_set_suspend(p, 0);
 480         chipsfb_blank(0, p);
 481         release_console_sem();
 482
 483         pdev->dev.power.power_state = PMSG_ON;
 484         return 0;
 485 }
 486 #endif /* CONFIG_PM */
 487
 488
 489 static struct pci_device_id chipsfb_pci_tbl[] = {
 490         { PCI_VENDOR_ID_CT, PCI_DEVICE_ID_CT_65550, PCI_ANY_ID, PCI_ANY_ID },
 491         { 0 }
 492 };
 493
 494 MODULE_DEVICE_TABLE(pci, chipsfb_pci_tbl);
 495
 496 static struct pci_driver chipsfb_driver = {
 497         .name =         "chipsfb",
 498         .id_table =     chipsfb_pci_tbl,
 499         .probe =        chipsfb_pci_init,
 500         .remove =       __devexit_p(chipsfb_remove),
 501 #ifdef CONFIG_PM
 502         .suspend =      chipsfb_pci_suspend,
 503         .resume =       chipsfb_pci_resume,
 504 #endif
 505 };
 506
 507 int __init chips_init(void)
 508 {
 509         if (fb_get_options("chipsfb", NULL))
 510                 return -ENODEV;
 511
 512         return pci_register_driver(&chipsfb_driver);
 513 }
 514
 515 module_init(chips_init);
 516
 517 static void __exit chipsfb_exit(void)
 518 {
 519         pci_unregister_driver(&chipsfb_driver);
 520 }
 521
 522 MODULE_LICENSE("GPL");