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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/delay.h>
29#include <linux/fb.h>
30#include <linux/console.h>
31#include <linux/suspend.h>
32#include <linux/init.h>
33#include <linux/pci.h>
34#include <linux/cs5535.h>
35
36#include "gxfb.h"
37
38static char *mode_option;
39static int vram;
40static int vt_switch;
41
42
43static struct fb_videomode gx_modedb[] = {
44
45 { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2,
46 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
47
48 { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
49 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
50
51 { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
52 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
53
54 { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
55 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
56 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
57
58 { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
59 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
60 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
61
62 { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
63 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
64 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
65
66 { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
67 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
68
69 { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
70 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
71 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
72
73 { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
74 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
75 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
76
77 { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
78 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
79 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
80
81 { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
82 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
83 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
84
85 { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
86 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
87 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
88
89 { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
90 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
91 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
92
93 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
94 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
95 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
96
97 { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
98 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
99 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
100
101 { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
102 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
103 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
104
105 { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
106 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
107 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
108};
109
110#ifdef CONFIG_OLPC
111#include <asm/olpc.h>
112
113static struct fb_videomode gx_dcon_modedb[] = {
114
115 { NULL, 50, 1200, 900, 17460, 24, 8, 4, 5, 8, 3,
116 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
117 FB_VMODE_NONINTERLACED, 0 }
118};
119
120static void get_modedb(struct fb_videomode **modedb, unsigned int *size)
121{
122 if (olpc_has_dcon()) {
123 *modedb = (struct fb_videomode *) gx_dcon_modedb;
124 *size = ARRAY_SIZE(gx_dcon_modedb);
125 } else {
126 *modedb = (struct fb_videomode *) gx_modedb;
127 *size = ARRAY_SIZE(gx_modedb);
128 }
129}
130
131#else
132static void get_modedb(struct fb_videomode **modedb, unsigned int *size)
133{
134 *modedb = (struct fb_videomode *) gx_modedb;
135 *size = ARRAY_SIZE(gx_modedb);
136}
137#endif
138
139static int gxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
140{
141 if (var->xres > 1600 || var->yres > 1200)
142 return -EINVAL;
143 if ((var->xres > 1280 || var->yres > 1024) && var->bits_per_pixel > 16)
144 return -EINVAL;
145
146 if (var->bits_per_pixel == 32) {
147 var->red.offset = 16; var->red.length = 8;
148 var->green.offset = 8; var->green.length = 8;
149 var->blue.offset = 0; var->blue.length = 8;
150 } else if (var->bits_per_pixel == 16) {
151 var->red.offset = 11; var->red.length = 5;
152 var->green.offset = 5; var->green.length = 6;
153 var->blue.offset = 0; var->blue.length = 5;
154 } else if (var->bits_per_pixel == 8) {
155 var->red.offset = 0; var->red.length = 8;
156 var->green.offset = 0; var->green.length = 8;
157 var->blue.offset = 0; var->blue.length = 8;
158 } else
159 return -EINVAL;
160 var->transp.offset = 0; var->transp.length = 0;
161
162
163 if (gx_line_delta(var->xres, var->bits_per_pixel) * var->yres > info->fix.smem_len)
164 return -EINVAL;
165
166
167
168 return 0;
169}
170
171static int gxfb_set_par(struct fb_info *info)
172{
173 if (info->var.bits_per_pixel > 8)
174 info->fix.visual = FB_VISUAL_TRUECOLOR;
175 else
176 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
177
178 info->fix.line_length = gx_line_delta(info->var.xres, info->var.bits_per_pixel);
179
180 gx_set_mode(info);
181
182 return 0;
183}
184
185static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
186{
187 chan &= 0xffff;
188 chan >>= 16 - bf->length;
189 return chan << bf->offset;
190}
191
192static int gxfb_setcolreg(unsigned regno, unsigned red, unsigned green,
193 unsigned blue, unsigned transp,
194 struct fb_info *info)
195{
196 if (info->var.grayscale) {
197
198 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
199 }
200
201
202 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
203 u32 *pal = info->pseudo_palette;
204 u32 v;
205
206 if (regno >= 16)
207 return -EINVAL;
208
209 v = chan_to_field(red, &info->var.red);
210 v |= chan_to_field(green, &info->var.green);
211 v |= chan_to_field(blue, &info->var.blue);
212
213 pal[regno] = v;
214 } else {
215 if (regno >= 256)
216 return -EINVAL;
217
218 gx_set_hw_palette_reg(info, regno, red, green, blue);
219 }
220
221 return 0;
222}
223
224static int gxfb_blank(int blank_mode, struct fb_info *info)
225{
226 return gx_blank_display(info, blank_mode);
227}
228
229static int gxfb_map_video_memory(struct fb_info *info, struct pci_dev *dev)
230{
231 struct gxfb_par *par = info->par;
232 int ret;
233
234 ret = pci_enable_device(dev);
235 if (ret < 0)
236 return ret;
237
238 ret = pci_request_region(dev, 3, "gxfb (video processor)");
239 if (ret < 0)
240 return ret;
241 par->vid_regs = pci_ioremap_bar(dev, 3);
242 if (!par->vid_regs)
243 return -ENOMEM;
244
245 ret = pci_request_region(dev, 2, "gxfb (display controller)");
246 if (ret < 0)
247 return ret;
248 par->dc_regs = pci_ioremap_bar(dev, 2);
249 if (!par->dc_regs)
250 return -ENOMEM;
251
252 ret = pci_request_region(dev, 1, "gxfb (graphics processor)");
253 if (ret < 0)
254 return ret;
255 par->gp_regs = pci_ioremap_bar(dev, 1);
256
257 if (!par->gp_regs)
258 return -ENOMEM;
259
260 ret = pci_request_region(dev, 0, "gxfb (framebuffer)");
261 if (ret < 0)
262 return ret;
263
264 info->fix.smem_start = pci_resource_start(dev, 0);
265 info->fix.smem_len = vram ? vram : gx_frame_buffer_size();
266 info->screen_base = ioremap_wc(info->fix.smem_start,
267 info->fix.smem_len);
268 if (!info->screen_base)
269 return -ENOMEM;
270
271
272
273
274 write_dc(par, DC_GLIU0_MEM_OFFSET, info->fix.smem_start & 0xFF000000);
275
276 dev_info(&dev->dev, "%d KiB of video memory at 0x%lx\n",
277 info->fix.smem_len / 1024, info->fix.smem_start);
278
279 return 0;
280}
281
282static struct fb_ops gxfb_ops = {
283 .owner = THIS_MODULE,
284 .fb_check_var = gxfb_check_var,
285 .fb_set_par = gxfb_set_par,
286 .fb_setcolreg = gxfb_setcolreg,
287 .fb_blank = gxfb_blank,
288
289 .fb_fillrect = cfb_fillrect,
290 .fb_copyarea = cfb_copyarea,
291 .fb_imageblit = cfb_imageblit,
292};
293
294static struct fb_info *gxfb_init_fbinfo(struct device *dev)
295{
296 struct gxfb_par *par;
297 struct fb_info *info;
298
299
300 info = framebuffer_alloc(sizeof(struct gxfb_par) + sizeof(u32) * 16,
301 dev);
302 if (!info)
303 return NULL;
304
305 par = info->par;
306
307 strcpy(info->fix.id, "Geode GX");
308
309 info->fix.type = FB_TYPE_PACKED_PIXELS;
310 info->fix.type_aux = 0;
311 info->fix.xpanstep = 0;
312 info->fix.ypanstep = 0;
313 info->fix.ywrapstep = 0;
314 info->fix.accel = FB_ACCEL_NONE;
315
316 info->var.nonstd = 0;
317 info->var.activate = FB_ACTIVATE_NOW;
318 info->var.height = -1;
319 info->var.width = -1;
320 info->var.accel_flags = 0;
321 info->var.vmode = FB_VMODE_NONINTERLACED;
322
323 info->fbops = &gxfb_ops;
324 info->flags = FBINFO_DEFAULT;
325 info->node = -1;
326
327 info->pseudo_palette = (void *)par + sizeof(struct gxfb_par);
328
329 info->var.grayscale = 0;
330
331 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
332 framebuffer_release(info);
333 return NULL;
334 }
335
336 return info;
337}
338
339#ifdef CONFIG_PM
340static int gxfb_suspend(struct pci_dev *pdev, pm_message_t state)
341{
342 struct fb_info *info = pci_get_drvdata(pdev);
343
344 if (state.event == PM_EVENT_SUSPEND) {
345 console_lock();
346 gx_powerdown(info);
347 fb_set_suspend(info, 1);
348 console_unlock();
349 }
350
351
352
353
354 return 0;
355}
356
357static int gxfb_resume(struct pci_dev *pdev)
358{
359 struct fb_info *info = pci_get_drvdata(pdev);
360 int ret;
361
362 console_lock();
363 ret = gx_powerup(info);
364 if (ret) {
365 printk(KERN_ERR "gxfb: power up failed!\n");
366 return ret;
367 }
368
369 fb_set_suspend(info, 0);
370 console_unlock();
371 return 0;
372}
373#endif
374
375static int gxfb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
376{
377 struct gxfb_par *par;
378 struct fb_info *info;
379 int ret;
380 unsigned long val;
381
382 struct fb_videomode *modedb_ptr;
383 unsigned int modedb_size;
384
385 info = gxfb_init_fbinfo(&pdev->dev);
386 if (!info)
387 return -ENOMEM;
388 par = info->par;
389
390 if ((ret = gxfb_map_video_memory(info, pdev)) < 0) {
391 dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n");
392 goto err;
393 }
394
395
396
397 rdmsrl(MSR_GX_GLD_MSR_CONFIG, val);
398
399 if ((val & MSR_GX_GLD_MSR_CONFIG_FP) == MSR_GX_GLD_MSR_CONFIG_FP)
400 par->enable_crt = 0;
401 else
402 par->enable_crt = 1;
403
404 get_modedb(&modedb_ptr, &modedb_size);
405 ret = fb_find_mode(&info->var, info, mode_option,
406 modedb_ptr, modedb_size, NULL, 16);
407 if (ret == 0 || ret == 4) {
408 dev_err(&pdev->dev, "could not find valid video mode\n");
409 ret = -EINVAL;
410 goto err;
411 }
412
413
414
415 memset_io(info->screen_base, 0, info->fix.smem_len);
416
417 gxfb_check_var(&info->var, info);
418 gxfb_set_par(info);
419
420 pm_set_vt_switch(vt_switch);
421
422 if (register_framebuffer(info) < 0) {
423 ret = -EINVAL;
424 goto err;
425 }
426 pci_set_drvdata(pdev, info);
427 fb_info(info, "%s frame buffer device\n", info->fix.id);
428 return 0;
429
430 err:
431 if (info->screen_base) {
432 iounmap(info->screen_base);
433 pci_release_region(pdev, 0);
434 }
435 if (par->vid_regs) {
436 iounmap(par->vid_regs);
437 pci_release_region(pdev, 3);
438 }
439 if (par->dc_regs) {
440 iounmap(par->dc_regs);
441 pci_release_region(pdev, 2);
442 }
443 if (par->gp_regs) {
444 iounmap(par->gp_regs);
445 pci_release_region(pdev, 1);
446 }
447
448 fb_dealloc_cmap(&info->cmap);
449 framebuffer_release(info);
450 return ret;
451}
452
453static void gxfb_remove(struct pci_dev *pdev)
454{
455 struct fb_info *info = pci_get_drvdata(pdev);
456 struct gxfb_par *par = info->par;
457
458 unregister_framebuffer(info);
459
460 iounmap((void __iomem *)info->screen_base);
461 pci_release_region(pdev, 0);
462
463 iounmap(par->vid_regs);
464 pci_release_region(pdev, 3);
465
466 iounmap(par->dc_regs);
467 pci_release_region(pdev, 2);
468
469 iounmap(par->gp_regs);
470 pci_release_region(pdev, 1);
471
472 fb_dealloc_cmap(&info->cmap);
473
474 framebuffer_release(info);
475}
476
477static struct pci_device_id gxfb_id_table[] = {
478 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_GX_VIDEO) },
479 { 0, }
480};
481
482MODULE_DEVICE_TABLE(pci, gxfb_id_table);
483
484static struct pci_driver gxfb_driver = {
485 .name = "gxfb",
486 .id_table = gxfb_id_table,
487 .probe = gxfb_probe,
488 .remove = gxfb_remove,
489#ifdef CONFIG_PM
490 .suspend = gxfb_suspend,
491 .resume = gxfb_resume,
492#endif
493};
494
495#ifndef MODULE
496static int __init gxfb_setup(char *options)
497{
498
499 char *opt;
500
501 if (!options || !*options)
502 return 0;
503
504 while ((opt = strsep(&options, ",")) != NULL) {
505 if (!*opt)
506 continue;
507
508 mode_option = opt;
509 }
510
511 return 0;
512}
513#endif
514
515static int __init gxfb_init(void)
516{
517#ifndef MODULE
518 char *option = NULL;
519
520 if (fb_get_options("gxfb", &option))
521 return -ENODEV;
522
523 gxfb_setup(option);
524#endif
525 return pci_register_driver(&gxfb_driver);
526}
527
528static void __exit gxfb_cleanup(void)
529{
530 pci_unregister_driver(&gxfb_driver);
531}
532
533module_init(gxfb_init);
534module_exit(gxfb_cleanup);
535
536module_param(mode_option, charp, 0);
537MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])");
538
539module_param(vram, int, 0);
540MODULE_PARM_DESC(vram, "video memory size");
541
542module_param(vt_switch, int, 0);
543MODULE_PARM_DESC(vt_switch, "enable VT switch during suspend/resume");
544
545MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode GX");
546MODULE_LICENSE("GPL");
547
