1 /* 2 * drivers/video/geode/gx1fb_core.c 3 * -- Geode GX1 framebuffer driver 4 * 5 * Copyright (C) 2005 Arcom Control Systems Ltd. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 */ 12 13 #include <linux/module.h> 14 #include <linux/kernel.h> 15 #include <linux/errno.h> 16 #include <linux/string.h> 17 #include <linux/mm.h> 18 #include <linux/delay.h> 19 #include <linux/fb.h> 20 #include <linux/init.h> 21 #include <linux/pci.h> 22 23 #include "geodefb.h" 24 #include "display_gx1.h" 25 #include "video_cs5530.h" 26 27 static char mode_option[32] = "640x480-16@60"; 28 static int crt_option = 1; 29 static char panel_option[32] = ""; 30 31 /* Modes relevant to the GX1 (taken from modedb.c) */ 32 static const struct fb_videomode gx1_modedb[] = { 33 /* 640x480-60 VESA */ 34 { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2, 35 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 36 /* 640x480-75 VESA */ 37 { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3, 38 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 39 /* 640x480-85 VESA */ 40 { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3, 41 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 42 /* 800x600-60 VESA */ 43 { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4, 44 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 45 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 46 /* 800x600-75 VESA */ 47 { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3, 48 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 49 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 50 /* 800x600-85 VESA */ 51 { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3, 52 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 53 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 54 /* 1024x768-60 VESA */ 55 { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6, 56 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 57 /* 1024x768-75 VESA */ 58 { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3, 59 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 60 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 61 /* 1024x768-85 VESA */ 62 { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3, 63 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 64 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 65 /* 1280x960-60 VESA */ 66 { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3, 67 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 68 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 69 /* 1280x960-85 VESA */ 70 { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3, 71 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 72 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 73 /* 1280x1024-60 VESA */ 74 { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3, 75 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 76 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 77 /* 1280x1024-75 VESA */ 78 { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3, 79 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 80 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 81 /* 1280x1024-85 VESA */ 82 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3, 83 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 84 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 85 }; 86 87 static int gx1_line_delta(int xres, int bpp) 88 { 89 int line_delta = xres * (bpp >> 3); 90 91 if (line_delta > 2048) 92 line_delta = 4096; 93 else if (line_delta > 1024) 94 line_delta = 2048; 95 else 96 line_delta = 1024; 97 return line_delta; 98 } 99 100 static int gx1fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) 101 { 102 struct geodefb_par *par = info->par; 103 104 /* Maximum resolution is 1280x1024. */ 105 if (var->xres > 1280 || var->yres > 1024) 106 return -EINVAL; 107 108 if (par->panel_x && (var->xres > par->panel_x || var->yres > par->panel_y)) 109 return -EINVAL; 110 111 /* Only 16 bpp and 8 bpp is supported by the hardware. */ 112 if (var->bits_per_pixel == 16) { 113 var->red.offset = 11; var->red.length = 5; 114 var->green.offset = 5; var->green.length = 6; 115 var->blue.offset = 0; var->blue.length = 5; 116 var->transp.offset = 0; var->transp.length = 0; 117 } else if (var->bits_per_pixel == 8) { 118 var->red.offset = 0; var->red.length = 8; 119 var->green.offset = 0; var->green.length = 8; 120 var->blue.offset = 0; var->blue.length = 8; 121 var->transp.offset = 0; var->transp.length = 0; 122 } else 123 return -EINVAL; 124 125 /* Enough video memory? */ 126 if (gx1_line_delta(var->xres, var->bits_per_pixel) * var->yres > info->fix.smem_len) 127 return -EINVAL; 128 129 /* FIXME: Check timing parameters here? */ 130 131 return 0; 132 } 133 134 static int gx1fb_set_par(struct fb_info *info) 135 { 136 struct geodefb_par *par = info->par; 137 138 if (info->var.bits_per_pixel == 16) 139 info->fix.visual = FB_VISUAL_TRUECOLOR; 140 else 141 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 142 143 info->fix.line_length = gx1_line_delta(info->var.xres, info->var.bits_per_pixel); 144 145 par->dc_ops->set_mode(info); 146 147 return 0; 148 } 149 150 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) 151 { 152 chan &= 0xffff; 153 chan >>= 16 - bf->length; 154 return chan << bf->offset; 155 } 156 157 static int gx1fb_setcolreg(unsigned regno, unsigned red, unsigned green, 158 unsigned blue, unsigned transp, 159 struct fb_info *info) 160 { 161 struct geodefb_par *par = info->par; 162 163 if (info->var.grayscale) { 164 /* grayscale = 0.30*R + 0.59*G + 0.11*B */ 165 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8; 166 } 167 168 /* Truecolor has hardware independent palette */ 169 if (info->fix.visual == FB_VISUAL_TRUECOLOR) { 170 u32 *pal = info->pseudo_palette; 171 u32 v; 172 173 if (regno >= 16) 174 return -EINVAL; 175 176 v = chan_to_field(red, &info->var.red); 177 v |= chan_to_field(green, &info->var.green); 178 v |= chan_to_field(blue, &info->var.blue); 179 180 pal[regno] = v; 181 } else { 182 if (regno >= 256) 183 return -EINVAL; 184 185 par->dc_ops->set_palette_reg(info, regno, red, green, blue); 186 } 187 188 return 0; 189 } 190 191 static int gx1fb_blank(int blank_mode, struct fb_info *info) 192 { 193 struct geodefb_par *par = info->par; 194 195 return par->vid_ops->blank_display(info, blank_mode); 196 } 197 198 static int gx1fb_map_video_memory(struct fb_info *info, struct pci_dev *dev) 199 { 200 struct geodefb_par *par = info->par; 201 unsigned gx_base; 202 int fb_len; 203 int ret; 204 205 gx_base = gx1_gx_base(); 206 if (!gx_base) 207 return -ENODEV; 208 209 ret = pci_enable_device(dev); 210 if (ret < 0) 211 return ret; 212 213 ret = pci_request_region(dev, 0, "gx1fb (video)"); 214 if (ret < 0) 215 return ret; 216 par->vid_regs = pci_ioremap_bar(dev, 0); 217 if (!par->vid_regs) 218 return -ENOMEM; 219 220 if (!request_mem_region(gx_base + 0x8300, 0x100, "gx1fb (display controller)")) 221 return -EBUSY; 222 par->dc_regs = ioremap(gx_base + 0x8300, 0x100); 223 if (!par->dc_regs) 224 return -ENOMEM; 225 226 if ((fb_len = gx1_frame_buffer_size()) < 0) 227 return -ENOMEM; 228 info->fix.smem_start = gx_base + 0x800000; 229 info->fix.smem_len = fb_len; 230 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); 231 if (!info->screen_base) 232 return -ENOMEM; 233 234 dev_info(&dev->dev, "%d Kibyte of video memory at 0x%lx\n", 235 info->fix.smem_len / 1024, info->fix.smem_start); 236 237 return 0; 238 } 239 240 static int parse_panel_option(struct fb_info *info) 241 { 242 struct geodefb_par *par = info->par; 243 244 if (strcmp(panel_option, "") != 0) { 245 int x, y; 246 char *s; 247 x = simple_strtol(panel_option, &s, 10); 248 if (!x) 249 return -EINVAL; 250 y = simple_strtol(s + 1, NULL, 10); 251 if (!y) 252 return -EINVAL; 253 par->panel_x = x; 254 par->panel_y = y; 255 } 256 return 0; 257 } 258 259 static struct fb_ops gx1fb_ops = { 260 .owner = THIS_MODULE, 261 .fb_check_var = gx1fb_check_var, 262 .fb_set_par = gx1fb_set_par, 263 .fb_setcolreg = gx1fb_setcolreg, 264 .fb_blank = gx1fb_blank, 265 /* No HW acceleration for now. */ 266 .fb_fillrect = cfb_fillrect, 267 .fb_copyarea = cfb_copyarea, 268 .fb_imageblit = cfb_imageblit, 269 }; 270 271 static struct fb_info *gx1fb_init_fbinfo(struct device *dev) 272 { 273 struct geodefb_par *par; 274 struct fb_info *info; 275 276 /* Alloc enough space for the pseudo palette. */ 277 info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, dev); 278 if (!info) 279 return NULL; 280 281 par = info->par; 282 283 strcpy(info->fix.id, "GX1"); 284 285 info->fix.type = FB_TYPE_PACKED_PIXELS; 286 info->fix.type_aux = 0; 287 info->fix.xpanstep = 0; 288 info->fix.ypanstep = 0; 289 info->fix.ywrapstep = 0; 290 info->fix.accel = FB_ACCEL_NONE; 291 292 info->var.nonstd = 0; 293 info->var.activate = FB_ACTIVATE_NOW; 294 info->var.height = -1; 295 info->var.width = -1; 296 info->var.accel_flags = 0; 297 info->var.vmode = FB_VMODE_NONINTERLACED; 298 299 info->fbops = &gx1fb_ops; 300 info->flags = FBINFO_DEFAULT; 301 info->node = -1; 302 303 info->pseudo_palette = (void *)par + sizeof(struct geodefb_par); 304 305 info->var.grayscale = 0; 306 307 /* CRT and panel options */ 308 par->enable_crt = crt_option; 309 if (parse_panel_option(info) < 0) 310 printk(KERN_WARNING "gx1fb: invalid 'panel' option -- disabling flat panel\n"); 311 if (!par->panel_x) 312 par->enable_crt = 1; /* fall back to CRT if no panel is specified */ 313 314 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { 315 framebuffer_release(info); 316 return NULL; 317 } 318 return info; 319 } 320 321 static int gx1fb_probe(struct pci_dev *pdev, const struct pci_device_id *id) 322 { 323 struct geodefb_par *par; 324 struct fb_info *info; 325 int ret; 326 327 info = gx1fb_init_fbinfo(&pdev->dev); 328 if (!info) 329 return -ENOMEM; 330 par = info->par; 331 332 /* GX1 display controller and CS5530 video device */ 333 par->dc_ops = &gx1_dc_ops; 334 par->vid_ops = &cs5530_vid_ops; 335 336 if ((ret = gx1fb_map_video_memory(info, pdev)) < 0) { 337 dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n"); 338 goto err; 339 } 340 341 ret = fb_find_mode(&info->var, info, mode_option, 342 gx1_modedb, ARRAY_SIZE(gx1_modedb), NULL, 16); 343 if (ret == 0 || ret == 4) { 344 dev_err(&pdev->dev, "could not find valid video mode\n"); 345 ret = -EINVAL; 346 goto err; 347 } 348 349 /* Clear the frame buffer of garbage. */ 350 memset_io(info->screen_base, 0, info->fix.smem_len); 351 352 gx1fb_check_var(&info->var, info); 353 gx1fb_set_par(info); 354 355 if (register_framebuffer(info) < 0) { 356 ret = -EINVAL; 357 goto err; 358 } 359 pci_set_drvdata(pdev, info); 360 fb_info(info, "%s frame buffer device\n", info->fix.id); 361 return 0; 362 363 err: 364 if (info->screen_base) { 365 iounmap(info->screen_base); 366 pci_release_region(pdev, 0); 367 } 368 if (par->vid_regs) { 369 iounmap(par->vid_regs); 370 pci_release_region(pdev, 1); 371 } 372 if (par->dc_regs) { 373 iounmap(par->dc_regs); 374 release_mem_region(gx1_gx_base() + 0x8300, 0x100); 375 } 376 377 fb_dealloc_cmap(&info->cmap); 378 framebuffer_release(info); 379 380 return ret; 381 } 382 383 static void gx1fb_remove(struct pci_dev *pdev) 384 { 385 struct fb_info *info = pci_get_drvdata(pdev); 386 struct geodefb_par *par = info->par; 387 388 unregister_framebuffer(info); 389 390 iounmap((void __iomem *)info->screen_base); 391 pci_release_region(pdev, 0); 392 393 iounmap(par->vid_regs); 394 pci_release_region(pdev, 1); 395 396 iounmap(par->dc_regs); 397 release_mem_region(gx1_gx_base() + 0x8300, 0x100); 398 399 fb_dealloc_cmap(&info->cmap); 400 401 framebuffer_release(info); 402 } 403 404 #ifndef MODULE 405 static void __init gx1fb_setup(char *options) 406 { 407 char *this_opt; 408 409 if (!options || !*options) 410 return; 411 412 while ((this_opt = strsep(&options, ","))) { 413 if (!*this_opt) 414 continue; 415 416 if (!strncmp(this_opt, "mode:", 5)) 417 strlcpy(mode_option, this_opt + 5, sizeof(mode_option)); 418 else if (!strncmp(this_opt, "crt:", 4)) 419 crt_option = !!simple_strtoul(this_opt + 4, NULL, 0); 420 else if (!strncmp(this_opt, "panel:", 6)) 421 strlcpy(panel_option, this_opt + 6, sizeof(panel_option)); 422 else 423 strlcpy(mode_option, this_opt, sizeof(mode_option)); 424 } 425 } 426 #endif 427 428 static struct pci_device_id gx1fb_id_table[] = { 429 { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_VIDEO, 430 PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16, 431 0xff0000, 0 }, 432 { 0, } 433 }; 434 435 MODULE_DEVICE_TABLE(pci, gx1fb_id_table); 436 437 static struct pci_driver gx1fb_driver = { 438 .name = "gx1fb", 439 .id_table = gx1fb_id_table, 440 .probe = gx1fb_probe, 441 .remove = gx1fb_remove, 442 }; 443 444 static int __init gx1fb_init(void) 445 { 446 #ifndef MODULE 447 char *option = NULL; 448 449 if (fb_get_options("gx1fb", &option)) 450 return -ENODEV; 451 gx1fb_setup(option); 452 #endif 453 return pci_register_driver(&gx1fb_driver); 454 } 455 456 static void gx1fb_cleanup(void) 457 { 458 pci_unregister_driver(&gx1fb_driver); 459 } 460 461 module_init(gx1fb_init); 462 module_exit(gx1fb_cleanup); 463 464 module_param_string(mode, mode_option, sizeof(mode_option), 0444); 465 MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])"); 466 467 module_param_named(crt, crt_option, int, 0444); 468 MODULE_PARM_DESC(crt, "enable CRT output. 0 = off, 1 = on (default)"); 469 470 module_param_string(panel, panel_option, sizeof(panel_option), 0444); 471 MODULE_PARM_DESC(panel, "size of attached flat panel (<x>x<y>)"); 472 473 MODULE_DESCRIPTION("framebuffer driver for the AMD Geode GX1"); 474 MODULE_LICENSE("GPL"); 475