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