gxfb_core.c revision fc4effc7a98d0d320e478d1d42bc4a8a64380150
1/* 2 * Geode GX framebuffer driver. 3 * 4 * Copyright (C) 2006 Arcom Control Systems Ltd. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 * 11 * 12 * This driver assumes that the BIOS has created a virtual PCI device header 13 * for the video device. The PCI header is assumed to contain the following 14 * BARs: 15 * 16 * BAR0 - framebuffer memory 17 * BAR1 - graphics processor registers 18 * BAR2 - display controller registers 19 * BAR3 - video processor and flat panel control registers. 20 * 21 * 16 MiB of framebuffer memory is assumed to be available. 22 */ 23#include <linux/module.h> 24#include <linux/kernel.h> 25#include <linux/errno.h> 26#include <linux/string.h> 27#include <linux/mm.h> 28#include <linux/tty.h> 29#include <linux/slab.h> 30#include <linux/delay.h> 31#include <linux/fb.h> 32#include <linux/init.h> 33#include <linux/pci.h> 34 35#include "geodefb.h" 36#include "display_gx.h" 37#include "video_gx.h" 38 39static char mode_option[32] = "640x480-16@60"; 40 41/* Modes relevant to the GX (taken from modedb.c) */ 42static const struct fb_videomode __initdata gx_modedb[] = { 43 /* 640x480-60 VESA */ 44 { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2, 45 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 46 /* 640x480-75 VESA */ 47 { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3, 48 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 49 /* 640x480-85 VESA */ 50 { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3, 51 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 52 /* 800x600-60 VESA */ 53 { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4, 54 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 55 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 56 /* 800x600-75 VESA */ 57 { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3, 58 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 59 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 60 /* 800x600-85 VESA */ 61 { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3, 62 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 63 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 64 /* 1024x768-60 VESA */ 65 { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6, 66 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 67 /* 1024x768-75 VESA */ 68 { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3, 69 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 70 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 71 /* 1024x768-85 VESA */ 72 { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3, 73 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 74 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 75 /* 1280x960-60 VESA */ 76 { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3, 77 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 78 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 79 /* 1280x960-85 VESA */ 80 { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3, 81 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 82 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 83 /* 1280x1024-60 VESA */ 84 { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3, 85 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 86 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 87 /* 1280x1024-75 VESA */ 88 { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3, 89 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 90 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 91 /* 1280x1024-85 VESA */ 92 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3, 93 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 94 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 95 /* 1600x1200-60 VESA */ 96 { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3, 97 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 98 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 99 /* 1600x1200-75 VESA */ 100 { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3, 101 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 102 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 103 /* 1600x1200-85 VESA */ 104 { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3, 105 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 106 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, 107}; 108 109static int gxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) 110{ 111 if (var->xres > 1600 || var->yres > 1200) 112 return -EINVAL; 113 if ((var->xres > 1280 || var->yres > 1024) && var->bits_per_pixel > 16) 114 return -EINVAL; 115 116 if (var->bits_per_pixel == 32) { 117 var->red.offset = 16; var->red.length = 8; 118 var->green.offset = 8; var->green.length = 8; 119 var->blue.offset = 0; var->blue.length = 8; 120 } else if (var->bits_per_pixel == 16) { 121 var->red.offset = 11; var->red.length = 5; 122 var->green.offset = 5; var->green.length = 6; 123 var->blue.offset = 0; var->blue.length = 5; 124 } else if (var->bits_per_pixel == 8) { 125 var->red.offset = 0; var->red.length = 8; 126 var->green.offset = 0; var->green.length = 8; 127 var->blue.offset = 0; var->blue.length = 8; 128 } else 129 return -EINVAL; 130 var->transp.offset = 0; var->transp.length = 0; 131 132 /* Enough video memory? */ 133 if (gx_line_delta(var->xres, var->bits_per_pixel) * var->yres > info->fix.smem_len) 134 return -EINVAL; 135 136 /* FIXME: Check timing parameters here? */ 137 138 return 0; 139} 140 141static int gxfb_set_par(struct fb_info *info) 142{ 143 struct geodefb_par *par = info->par; 144 145 if (info->var.bits_per_pixel > 8) { 146 info->fix.visual = FB_VISUAL_TRUECOLOR; 147 fb_dealloc_cmap(&info->cmap); 148 } else { 149 info->fix.visual = FB_VISUAL_PSEUDOCOLOR; 150 fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0); 151 } 152 153 info->fix.line_length = gx_line_delta(info->var.xres, info->var.bits_per_pixel); 154 155 par->dc_ops->set_mode(info); 156 157 return 0; 158} 159 160static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) 161{ 162 chan &= 0xffff; 163 chan >>= 16 - bf->length; 164 return chan << bf->offset; 165} 166 167static int gxfb_setcolreg(unsigned regno, unsigned red, unsigned green, 168 unsigned blue, unsigned transp, 169 struct fb_info *info) 170{ 171 struct geodefb_par *par = info->par; 172 173 if (info->var.grayscale) { 174 /* grayscale = 0.30*R + 0.59*G + 0.11*B */ 175 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8; 176 } 177 178 /* Truecolor has hardware independent palette */ 179 if (info->fix.visual == FB_VISUAL_TRUECOLOR) { 180 u32 *pal = info->pseudo_palette; 181 u32 v; 182 183 if (regno >= 16) 184 return -EINVAL; 185 186 v = chan_to_field(red, &info->var.red); 187 v |= chan_to_field(green, &info->var.green); 188 v |= chan_to_field(blue, &info->var.blue); 189 190 pal[regno] = v; 191 } else { 192 if (regno >= 256) 193 return -EINVAL; 194 195 par->dc_ops->set_palette_reg(info, regno, red, green, blue); 196 } 197 198 return 0; 199} 200 201static int gxfb_blank(int blank_mode, struct fb_info *info) 202{ 203 struct geodefb_par *par = info->par; 204 205 return par->vid_ops->blank_display(info, blank_mode); 206} 207 208static int __init gxfb_map_video_memory(struct fb_info *info, struct pci_dev *dev) 209{ 210 struct geodefb_par *par = info->par; 211 int fb_len; 212 int ret; 213 214 ret = pci_enable_device(dev); 215 if (ret < 0) 216 return ret; 217 218 ret = pci_request_region(dev, 3, "gxfb (video processor)"); 219 if (ret < 0) 220 return ret; 221 par->vid_regs = ioremap(pci_resource_start(dev, 3), 222 pci_resource_len(dev, 3)); 223 if (!par->vid_regs) 224 return -ENOMEM; 225 226 ret = pci_request_region(dev, 2, "gxfb (display controller)"); 227 if (ret < 0) 228 return ret; 229 par->dc_regs = ioremap(pci_resource_start(dev, 2), pci_resource_len(dev, 2)); 230 if (!par->dc_regs) 231 return -ENOMEM; 232 233 ret = pci_request_region(dev, 0, "gxfb (framebuffer)"); 234 if (ret < 0) 235 return ret; 236 if ((fb_len = gx_frame_buffer_size()) < 0) 237 return -ENOMEM; 238 info->fix.smem_start = pci_resource_start(dev, 0); 239 info->fix.smem_len = fb_len; 240 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); 241 if (!info->screen_base) 242 return -ENOMEM; 243 244 dev_info(&dev->dev, "%d Kibyte of video memory at 0x%lx\n", 245 info->fix.smem_len / 1024, info->fix.smem_start); 246 247 return 0; 248} 249 250static struct fb_ops gxfb_ops = { 251 .owner = THIS_MODULE, 252 .fb_check_var = gxfb_check_var, 253 .fb_set_par = gxfb_set_par, 254 .fb_setcolreg = gxfb_setcolreg, 255 .fb_blank = gxfb_blank, 256 /* No HW acceleration for now. */ 257 .fb_fillrect = cfb_fillrect, 258 .fb_copyarea = cfb_copyarea, 259 .fb_imageblit = cfb_imageblit, 260}; 261 262static struct fb_info * __init gxfb_init_fbinfo(struct device *dev) 263{ 264 struct geodefb_par *par; 265 struct fb_info *info; 266 267 /* Alloc enough space for the pseudo palette. */ 268 info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, dev); 269 if (!info) 270 return NULL; 271 272 par = info->par; 273 274 strcpy(info->fix.id, "Geode GX"); 275 276 info->fix.type = FB_TYPE_PACKED_PIXELS; 277 info->fix.type_aux = 0; 278 info->fix.xpanstep = 0; 279 info->fix.ypanstep = 0; 280 info->fix.ywrapstep = 0; 281 info->fix.accel = FB_ACCEL_NONE; 282 283 info->var.nonstd = 0; 284 info->var.activate = FB_ACTIVATE_NOW; 285 info->var.height = -1; 286 info->var.width = -1; 287 info->var.accel_flags = 0; 288 info->var.vmode = FB_VMODE_NONINTERLACED; 289 290 info->fbops = &gxfb_ops; 291 info->flags = FBINFO_DEFAULT; 292 info->node = -1; 293 294 info->pseudo_palette = (void *)par + sizeof(struct geodefb_par); 295 296 info->var.grayscale = 0; 297 298 return info; 299} 300 301static int __init gxfb_probe(struct pci_dev *pdev, const struct pci_device_id *id) 302{ 303 struct geodefb_par *par; 304 struct fb_info *info; 305 int ret; 306 307 info = gxfb_init_fbinfo(&pdev->dev); 308 if (!info) 309 return -ENOMEM; 310 par = info->par; 311 312 /* GX display controller and GX video device. */ 313 par->dc_ops = &gx_dc_ops; 314 par->vid_ops = &gx_vid_ops; 315 316 if ((ret = gxfb_map_video_memory(info, pdev)) < 0) { 317 dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n"); 318 goto err; 319 } 320 321 ret = fb_find_mode(&info->var, info, mode_option, 322 gx_modedb, ARRAY_SIZE(gx_modedb), NULL, 16); 323 if (ret == 0 || ret == 4) { 324 dev_err(&pdev->dev, "could not find valid video mode\n"); 325 ret = -EINVAL; 326 goto err; 327 } 328 329 /* Clear the frame buffer of garbage. */ 330 memset_io(info->screen_base, 0, info->fix.smem_len); 331 332 gxfb_check_var(&info->var, info); 333 gxfb_set_par(info); 334 335 if (register_framebuffer(info) < 0) { 336 ret = -EINVAL; 337 goto err; 338 } 339 pci_set_drvdata(pdev, info); 340 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id); 341 return 0; 342 343 err: 344 if (info->screen_base) { 345 iounmap(info->screen_base); 346 pci_release_region(pdev, 0); 347 } 348 if (par->vid_regs) { 349 iounmap(par->vid_regs); 350 pci_release_region(pdev, 3); 351 } 352 if (par->dc_regs) { 353 iounmap(par->dc_regs); 354 pci_release_region(pdev, 2); 355 } 356 357 pci_disable_device(pdev); 358 359 if (info) 360 framebuffer_release(info); 361 return ret; 362} 363 364static void gxfb_remove(struct pci_dev *pdev) 365{ 366 struct fb_info *info = pci_get_drvdata(pdev); 367 struct geodefb_par *par = info->par; 368 369 unregister_framebuffer(info); 370 371 iounmap((void __iomem *)info->screen_base); 372 pci_release_region(pdev, 0); 373 374 iounmap(par->vid_regs); 375 pci_release_region(pdev, 3); 376 377 iounmap(par->dc_regs); 378 pci_release_region(pdev, 2); 379 380 pci_disable_device(pdev); 381 pci_set_drvdata(pdev, NULL); 382 383 framebuffer_release(info); 384} 385 386static struct pci_device_id gxfb_id_table[] = { 387 { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_VIDEO, 388 PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16, 389 0xff0000, 0 }, 390 { 0, } 391}; 392 393MODULE_DEVICE_TABLE(pci, gxfb_id_table); 394 395static struct pci_driver gxfb_driver = { 396 .name = "gxfb", 397 .id_table = gxfb_id_table, 398 .probe = gxfb_probe, 399 .remove = gxfb_remove, 400}; 401 402static int __init gxfb_init(void) 403{ 404#ifndef MODULE 405 if (fb_get_options("gxfb", NULL)) 406 return -ENODEV; 407#endif 408 return pci_register_driver(&gxfb_driver); 409} 410 411static void __exit gxfb_cleanup(void) 412{ 413 pci_unregister_driver(&gxfb_driver); 414} 415 416module_init(gxfb_init); 417module_exit(gxfb_cleanup); 418 419module_param_string(mode, mode_option, sizeof(mode_option), 0444); 420MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])"); 421 422MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode GX"); 423MODULE_LICENSE("GPL"); 424