Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
hitfb.c
Go to the documentation of this file.
1 /*
2  * linux/drivers/video/hitfb.c -- Hitachi LCD frame buffer device
3  *
4  * (C) 1999 Mihai Spatar
5  * (C) 2000 YAEGASHI Takeshi
6  * (C) 2003, 2004 Paul Mundt
7  * (C) 2003, 2004, 2006 Andriy Skulysh
8  *
9  * This file is subject to the terms and conditions of the GNU General Public
10  * License. See the file COPYING in the main directory of this archive for
11  * more details.
12  */
13 
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/errno.h>
17 #include <linux/string.h>
18 #include <linux/mm.h>
19 #include <linux/delay.h>
20 #include <linux/init.h>
21 #include <linux/platform_device.h>
22 #include <linux/fb.h>
23 
24 #include <asm/machvec.h>
25 #include <asm/uaccess.h>
26 #include <asm/pgtable.h>
27 #include <asm/io.h>
28 #include <asm/hd64461.h>
29 #include <cpu/dac.h>
30 
31 #define WIDTH 640
32 
33 static struct fb_var_screeninfo hitfb_var __devinitdata = {
34  .activate = FB_ACTIVATE_NOW,
35  .height = -1,
36  .width = -1,
37  .vmode = FB_VMODE_NONINTERLACED,
38 };
39 
40 static struct fb_fix_screeninfo hitfb_fix __devinitdata = {
41  .id = "Hitachi HD64461",
42  .type = FB_TYPE_PACKED_PIXELS,
43  .accel = FB_ACCEL_NONE,
44 };
45 
46 static inline void hitfb_accel_wait(void)
47 {
48  while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
49 }
50 
51 static inline void hitfb_accel_start(int truecolor)
52 {
53  if (truecolor) {
54  fb_writew(6, HD64461_GRCFGR);
55  } else {
56  fb_writew(7, HD64461_GRCFGR);
57  }
58 }
59 
60 static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
61  u16 width, u16 height)
62 {
63  u32 saddr = WIDTH * dy + dx;
64  if (truecolor)
65  saddr <<= 1;
66 
67  fb_writew(width-1, HD64461_BBTDWR);
68  fb_writew(height-1, HD64461_BBTDHR);
69 
70  fb_writew(saddr & 0xffff, HD64461_BBTDSARL);
71  fb_writew(saddr >> 16, HD64461_BBTDSARH);
72 
73 }
74 
75 static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
76  u16 dy, u16 width, u16 height, u16 rop,
77  u32 mask_addr)
78 {
79  u32 saddr, daddr;
80  u32 maddr = 0;
81 
82  height--;
83  width--;
84  fb_writew(rop, HD64461_BBTROPR);
85  if ((sy < dy) || ((sy == dy) && (sx <= dx))) {
86  saddr = WIDTH * (sy + height) + sx + width;
87  daddr = WIDTH * (dy + height) + dx + width;
88  if (mask_addr) {
89  if (truecolor)
90  maddr = ((width >> 3) + 1) * (height + 1) - 1;
91  else
92  maddr =
93  (((width >> 4) + 1) * (height + 1) - 1) * 2;
94 
95  fb_writew((1 << 5) | 1, HD64461_BBTMDR);
96  } else
97  fb_writew(1, HD64461_BBTMDR);
98  } else {
99  saddr = WIDTH * sy + sx;
100  daddr = WIDTH * dy + dx;
101  if (mask_addr) {
102  fb_writew((1 << 5), HD64461_BBTMDR);
103  } else {
104  fb_writew(0, HD64461_BBTMDR);
105  }
106  }
107  if (truecolor) {
108  saddr <<= 1;
109  daddr <<= 1;
110  }
111  fb_writew(width, HD64461_BBTDWR);
112  fb_writew(height, HD64461_BBTDHR);
113  fb_writew(saddr & 0xffff, HD64461_BBTSSARL);
114  fb_writew(saddr >> 16, HD64461_BBTSSARH);
115  fb_writew(daddr & 0xffff, HD64461_BBTDSARL);
116  fb_writew(daddr >> 16, HD64461_BBTDSARH);
117  if (mask_addr) {
118  maddr += mask_addr;
119  fb_writew(maddr & 0xffff, HD64461_BBTMARL);
120  fb_writew(maddr >> 16, HD64461_BBTMARH);
121  }
122  hitfb_accel_start(truecolor);
123 }
124 
125 static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
126 {
127  if (rect->rop != ROP_COPY)
128  cfb_fillrect(p, rect);
129  else {
130  hitfb_accel_wait();
131  fb_writew(0x00f0, HD64461_BBTROPR);
132  fb_writew(16, HD64461_BBTMDR);
133 
134  if (p->var.bits_per_pixel == 16) {
135  fb_writew(((u32 *) (p->pseudo_palette))[rect->color],
136  HD64461_GRSCR);
137  hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
138  rect->height);
139  hitfb_accel_start(1);
140  } else {
141  fb_writew(rect->color, HD64461_GRSCR);
142  hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
143  rect->height);
144  hitfb_accel_start(0);
145  }
146  }
147 }
148 
149 static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
150 {
151  hitfb_accel_wait();
152  hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
153  area->dx, area->dy, area->width, area->height,
154  0x00cc, 0);
155 }
156 
157 static int hitfb_pan_display(struct fb_var_screeninfo *var,
158  struct fb_info *info)
159 {
160  int xoffset = var->xoffset;
161  int yoffset = var->yoffset;
162 
163  if (xoffset != 0)
164  return -EINVAL;
165 
166  fb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR);
167 
168  return 0;
169 }
170 
171 int hitfb_blank(int blank_mode, struct fb_info *info)
172 {
173  unsigned short v;
174 
175  if (blank_mode) {
176  v = fb_readw(HD64461_LDR1);
177  v &= ~HD64461_LDR1_DON;
178  fb_writew(v, HD64461_LDR1);
179 
180  v = fb_readw(HD64461_LCDCCR);
181  v |= HD64461_LCDCCR_MOFF;
182  fb_writew(v, HD64461_LCDCCR);
183 
184  v = fb_readw(HD64461_STBCR);
185  v |= HD64461_STBCR_SLCDST;
186  fb_writew(v, HD64461_STBCR);
187  } else {
188  v = fb_readw(HD64461_STBCR);
189  v &= ~HD64461_STBCR_SLCDST;
190  fb_writew(v, HD64461_STBCR);
191 
192  v = fb_readw(HD64461_LCDCCR);
193  v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ);
194  fb_writew(v, HD64461_LCDCCR);
195 
196  do {
197  v = fb_readw(HD64461_LCDCCR);
198  } while(v&HD64461_LCDCCR_STBACK);
199 
200  v = fb_readw(HD64461_LDR1);
201  v |= HD64461_LDR1_DON;
202  fb_writew(v, HD64461_LDR1);
203  }
204  return 0;
205 }
206 
207 static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
208  unsigned blue, unsigned transp, struct fb_info *info)
209 {
210  if (regno >= 256)
211  return 1;
212 
213  switch (info->var.bits_per_pixel) {
214  case 8:
215  fb_writew(regno << 8, HD64461_CPTWAR);
216  fb_writew(red >> 10, HD64461_CPTWDR);
217  fb_writew(green >> 10, HD64461_CPTWDR);
218  fb_writew(blue >> 10, HD64461_CPTWDR);
219  break;
220  case 16:
221  if (regno >= 16)
222  return 1;
223  ((u32 *) (info->pseudo_palette))[regno] =
224  ((red & 0xf800)) |
225  ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
226  break;
227  }
228  return 0;
229 }
230 
231 static int hitfb_sync(struct fb_info *info)
232 {
233  hitfb_accel_wait();
234 
235  return 0;
236 }
237 
238 static int hitfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
239 {
240  int maxy;
241 
242  var->xres = info->var.xres;
243  var->xres_virtual = info->var.xres;
244  var->yres = info->var.yres;
245 
246  if ((var->bits_per_pixel != 8) && (var->bits_per_pixel != 16))
247  var->bits_per_pixel = info->var.bits_per_pixel;
248 
249  if (var->yres_virtual < var->yres)
250  var->yres_virtual = var->yres;
251 
252  maxy = info->fix.smem_len / var->xres;
253 
254  if (var->bits_per_pixel == 16)
255  maxy /= 2;
256 
257  if (var->yres_virtual > maxy)
258  var->yres_virtual = maxy;
259 
260  var->xoffset = 0;
261  var->yoffset = 0;
262 
263  switch (var->bits_per_pixel) {
264  case 8:
265  var->red.offset = 0;
266  var->red.length = 8;
267  var->green.offset = 0;
268  var->green.length = 8;
269  var->blue.offset = 0;
270  var->blue.length = 8;
271  var->transp.offset = 0;
272  var->transp.length = 0;
273  break;
274  case 16: /* RGB 565 */
275  var->red.offset = 11;
276  var->red.length = 5;
277  var->green.offset = 5;
278  var->green.length = 6;
279  var->blue.offset = 0;
280  var->blue.length = 5;
281  var->transp.offset = 0;
282  var->transp.length = 0;
283  break;
284  }
285 
286  return 0;
287 }
288 
289 static int hitfb_set_par(struct fb_info *info)
290 {
291  unsigned short ldr3;
292 
293  switch (info->var.bits_per_pixel) {
294  case 8:
295  info->fix.line_length = info->var.xres;
296  info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
297  info->fix.ypanstep = 16;
298  break;
299  case 16:
300  info->fix.line_length = info->var.xres*2;
301  info->fix.visual = FB_VISUAL_TRUECOLOR;
302  info->fix.ypanstep = 8;
303  break;
304  }
305 
306  fb_writew(info->fix.line_length, HD64461_LCDCLOR);
307  ldr3 = fb_readw(HD64461_LDR3);
308  ldr3 &= ~15;
309  ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8;
310  fb_writew(ldr3, HD64461_LDR3);
311  return 0;
312 }
313 
314 static struct fb_ops hitfb_ops = {
315  .owner = THIS_MODULE,
316  .fb_check_var = hitfb_check_var,
317  .fb_set_par = hitfb_set_par,
318  .fb_setcolreg = hitfb_setcolreg,
319  .fb_blank = hitfb_blank,
320  .fb_sync = hitfb_sync,
321  .fb_pan_display = hitfb_pan_display,
322  .fb_fillrect = hitfb_fillrect,
323  .fb_copyarea = hitfb_copyarea,
324  .fb_imageblit = cfb_imageblit,
325 };
326 
327 static int __devinit hitfb_probe(struct platform_device *dev)
328 {
329  unsigned short lcdclor, ldr3, ldvndr;
330  struct fb_info *info;
331  int ret;
332 
333  if (fb_get_options("hitfb", NULL))
334  return -ENODEV;
335 
336  hitfb_fix.mmio_start = HD64461_IO_OFFSET(0x1000);
337  hitfb_fix.mmio_len = 0x1000;
338  hitfb_fix.smem_start = HD64461_IO_OFFSET(0x02000000);
339  hitfb_fix.smem_len = 512 * 1024;
340 
341  lcdclor = fb_readw(HD64461_LCDCLOR);
342  ldvndr = fb_readw(HD64461_LDVNDR);
343  ldr3 = fb_readw(HD64461_LDR3);
344 
345  switch (ldr3 & 15) {
346  default:
347  case 4:
348  hitfb_var.bits_per_pixel = 8;
349  hitfb_var.xres = lcdclor;
350  break;
351  case 8:
352  hitfb_var.bits_per_pixel = 16;
353  hitfb_var.xres = lcdclor / 2;
354  break;
355  }
356  hitfb_fix.line_length = lcdclor;
357  hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ?
358  FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
359  hitfb_var.yres = ldvndr + 1;
360  hitfb_var.xres_virtual = hitfb_var.xres;
361  hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor;
362  switch (hitfb_var.bits_per_pixel) {
363  case 8:
364  hitfb_var.red.offset = 0;
365  hitfb_var.red.length = 8;
366  hitfb_var.green.offset = 0;
367  hitfb_var.green.length = 8;
368  hitfb_var.blue.offset = 0;
369  hitfb_var.blue.length = 8;
370  hitfb_var.transp.offset = 0;
371  hitfb_var.transp.length = 0;
372  break;
373  case 16: /* RGB 565 */
374  hitfb_var.red.offset = 11;
375  hitfb_var.red.length = 5;
376  hitfb_var.green.offset = 5;
377  hitfb_var.green.length = 6;
378  hitfb_var.blue.offset = 0;
379  hitfb_var.blue.length = 5;
380  hitfb_var.transp.offset = 0;
381  hitfb_var.transp.length = 0;
382  break;
383  }
384 
385  info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
386  if (unlikely(!info))
387  return -ENOMEM;
388 
389  info->fbops = &hitfb_ops;
390  info->var = hitfb_var;
391  info->fix = hitfb_fix;
392  info->pseudo_palette = info->par;
393  info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN |
394  FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;
395 
396  info->screen_base = (void *)hitfb_fix.smem_start;
397 
398  ret = fb_alloc_cmap(&info->cmap, 256, 0);
399  if (unlikely(ret < 0))
400  goto err_fb;
401 
402  ret = register_framebuffer(info);
403  if (unlikely(ret < 0))
404  goto err;
405 
406  platform_set_drvdata(dev, info);
407 
408  printk(KERN_INFO "fb%d: %s frame buffer device\n",
409  info->node, info->fix.id);
410 
411  return 0;
412 
413 err:
414  fb_dealloc_cmap(&info->cmap);
415 err_fb:
416  framebuffer_release(info);
417  return ret;
418 }
419 
420 static int __devexit hitfb_remove(struct platform_device *dev)
421 {
422  struct fb_info *info = platform_get_drvdata(dev);
423 
424  unregister_framebuffer(info);
425  fb_dealloc_cmap(&info->cmap);
426  framebuffer_release(info);
427 
428  return 0;
429 }
430 
431 static int hitfb_suspend(struct device *dev)
432 {
433  u16 v;
434 
435  hitfb_blank(1,0);
436  v = fb_readw(HD64461_STBCR);
437  v |= HD64461_STBCR_SLCKE_IST;
438  fb_writew(v, HD64461_STBCR);
439 
440  return 0;
441 }
442 
443 static int hitfb_resume(struct device *dev)
444 {
445  u16 v;
446 
447  v = fb_readw(HD64461_STBCR);
448  v &= ~HD64461_STBCR_SLCKE_OST;
449  msleep(100);
450  v = fb_readw(HD64461_STBCR);
451  v &= ~HD64461_STBCR_SLCKE_IST;
452  fb_writew(v, HD64461_STBCR);
453  hitfb_blank(0,0);
454 
455  return 0;
456 }
457 
458 static const struct dev_pm_ops hitfb_dev_pm_ops = {
459  .suspend = hitfb_suspend,
460  .resume = hitfb_resume,
461 };
462 
463 static struct platform_driver hitfb_driver = {
464  .probe = hitfb_probe,
465  .remove = __devexit_p(hitfb_remove),
466  .driver = {
467  .name = "hitfb",
468  .owner = THIS_MODULE,
469  .pm = &hitfb_dev_pm_ops,
470  },
471 };
472 
473 static struct platform_device hitfb_device = {
474  .name = "hitfb",
475  .id = -1,
476 };
477 
478 static int __init hitfb_init(void)
479 {
480  int ret;
481 
482  ret = platform_driver_register(&hitfb_driver);
483  if (!ret) {
484  ret = platform_device_register(&hitfb_device);
485  if (ret)
486  platform_driver_unregister(&hitfb_driver);
487  }
488  return ret;
489 }
490 
491 
492 static void __exit hitfb_exit(void)
493 {
494  platform_device_unregister(&hitfb_device);
495  platform_driver_unregister(&hitfb_driver);
496 }
497 
498 module_init(hitfb_init);
499 module_exit(hitfb_exit);
500 
501 MODULE_LICENSE("GPL");
Generated on Thu Jan 10 2013 14:40:24 for Linux Kernel by   doxygen 1.8.2