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