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