Merge tag 'core-rcu-2021-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-microblaze.git] / drivers / video / fbdev / hitfb.c
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 <linux/uaccess.h>
26 #include <asm/io.h>
27 #include <asm/hd64461.h>
28 #include <cpu/dac.h>
29
30 #define WIDTH 640
31
32 static struct fb_var_screeninfo hitfb_var = {
33         .activate       = FB_ACTIVATE_NOW,
34         .height         = -1,
35         .width          = -1,
36         .vmode          = FB_VMODE_NONINTERLACED,
37 };
38
39 static struct fb_fix_screeninfo hitfb_fix = {
40         .id             = "Hitachi HD64461",
41         .type           = FB_TYPE_PACKED_PIXELS,
42         .accel          = FB_ACCEL_NONE,
43 };
44
45 static inline void hitfb_accel_wait(void)
46 {
47         while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
48 }
49
50 static inline void hitfb_accel_start(int truecolor)
51 {
52         if (truecolor) {
53                 fb_writew(6, HD64461_GRCFGR);
54         } else {
55                 fb_writew(7, HD64461_GRCFGR);
56         }
57 }
58
59 static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
60                                         u16 width, u16 height)
61 {
62         u32 saddr = WIDTH * dy + dx;
63         if (truecolor)
64                 saddr <<= 1;
65
66         fb_writew(width-1, HD64461_BBTDWR);
67         fb_writew(height-1, HD64461_BBTDHR);
68
69         fb_writew(saddr & 0xffff, HD64461_BBTDSARL);
70         fb_writew(saddr >> 16, HD64461_BBTDSARH);
71
72 }
73
74 static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
75                                       u16 dy, u16 width, u16 height, u16 rop,
76                                       u32 mask_addr)
77 {
78         u32 saddr, daddr;
79         u32 maddr = 0;
80
81         height--;
82         width--;
83         fb_writew(rop, HD64461_BBTROPR);
84         if ((sy < dy) || ((sy == dy) && (sx <= dx))) {
85                 saddr = WIDTH * (sy + height) + sx + width;
86                 daddr = WIDTH * (dy + height) + dx + width;
87                 if (mask_addr) {
88                         if (truecolor)
89                                 maddr = ((width >> 3) + 1) * (height + 1) - 1;
90                         else
91                                 maddr =
92                                     (((width >> 4) + 1) * (height + 1) - 1) * 2;
93
94                         fb_writew((1 << 5) | 1, HD64461_BBTMDR);
95                 } else
96                         fb_writew(1, HD64461_BBTMDR);
97         } else {
98                 saddr = WIDTH * sy + sx;
99                 daddr = WIDTH * dy + dx;
100                 if (mask_addr) {
101                         fb_writew((1 << 5), HD64461_BBTMDR);
102                 } else {
103                         fb_writew(0, HD64461_BBTMDR);
104                 }
105         }
106         if (truecolor) {
107                 saddr <<= 1;
108                 daddr <<= 1;
109         }
110         fb_writew(width, HD64461_BBTDWR);
111         fb_writew(height, HD64461_BBTDHR);
112         fb_writew(saddr & 0xffff, HD64461_BBTSSARL);
113         fb_writew(saddr >> 16, HD64461_BBTSSARH);
114         fb_writew(daddr & 0xffff, HD64461_BBTDSARL);
115         fb_writew(daddr >> 16, HD64461_BBTDSARH);
116         if (mask_addr) {
117                 maddr += mask_addr;
118                 fb_writew(maddr & 0xffff, HD64461_BBTMARL);
119                 fb_writew(maddr >> 16, HD64461_BBTMARH);
120         }
121         hitfb_accel_start(truecolor);
122 }
123
124 static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
125 {
126         if (rect->rop != ROP_COPY)
127                 cfb_fillrect(p, rect);
128         else {
129                 hitfb_accel_wait();
130                 fb_writew(0x00f0, HD64461_BBTROPR);
131                 fb_writew(16, HD64461_BBTMDR);
132
133                 if (p->var.bits_per_pixel == 16) {
134                         fb_writew(((u32 *) (p->pseudo_palette))[rect->color],
135                                   HD64461_GRSCR);
136                         hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
137                                              rect->height);
138                         hitfb_accel_start(1);
139                 } else {
140                         fb_writew(rect->color, HD64461_GRSCR);
141                         hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
142                                              rect->height);
143                         hitfb_accel_start(0);
144                 }
145         }
146 }
147
148 static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
149 {
150         hitfb_accel_wait();
151         hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
152                            area->dx, area->dy, area->width, area->height,
153                            0x00cc, 0);
154 }
155
156 static int hitfb_pan_display(struct fb_var_screeninfo *var,
157                              struct fb_info *info)
158 {
159         int xoffset = var->xoffset;
160         int yoffset = var->yoffset;
161
162         if (xoffset != 0)
163                 return -EINVAL;
164
165         fb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR);
166
167         return 0;
168 }
169
170 int hitfb_blank(int blank_mode, struct fb_info *info)
171 {
172         unsigned short v;
173
174         if (blank_mode) {
175                 v = fb_readw(HD64461_LDR1);
176                 v &= ~HD64461_LDR1_DON;
177                 fb_writew(v, HD64461_LDR1);
178
179                 v = fb_readw(HD64461_LCDCCR);
180                 v |= HD64461_LCDCCR_MOFF;
181                 fb_writew(v, HD64461_LCDCCR);
182
183                 v = fb_readw(HD64461_STBCR);
184                 v |= HD64461_STBCR_SLCDST;
185                 fb_writew(v, HD64461_STBCR);
186         } else {
187                 v = fb_readw(HD64461_STBCR);
188                 v &= ~HD64461_STBCR_SLCDST;
189                 fb_writew(v, HD64461_STBCR);
190
191                 v = fb_readw(HD64461_LCDCCR);
192                 v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ);
193                 fb_writew(v, HD64461_LCDCCR);
194
195                 do {
196                     v = fb_readw(HD64461_LCDCCR);
197                 } while(v&HD64461_LCDCCR_STBACK);
198
199                 v = fb_readw(HD64461_LDR1);
200                 v |= HD64461_LDR1_DON;
201                 fb_writew(v, HD64461_LDR1);
202         }
203         return 0;
204 }
205
206 static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
207                            unsigned blue, unsigned transp, struct fb_info *info)
208 {
209         if (regno >= 256)
210                 return 1;
211
212         switch (info->var.bits_per_pixel) {
213         case 8:
214                 fb_writew(regno << 8, HD64461_CPTWAR);
215                 fb_writew(red >> 10, HD64461_CPTWDR);
216                 fb_writew(green >> 10, HD64461_CPTWDR);
217                 fb_writew(blue >> 10, HD64461_CPTWDR);
218                 break;
219         case 16:
220                 if (regno >= 16)
221                         return 1;
222                 ((u32 *) (info->pseudo_palette))[regno] =
223                     ((red & 0xf800)) |
224                     ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
225                 break;
226         }
227         return 0;
228 }
229
230 static int hitfb_sync(struct fb_info *info)
231 {
232         hitfb_accel_wait();
233
234         return 0;
235 }
236
237 static int hitfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
238 {
239         int maxy;
240
241         var->xres = info->var.xres;
242         var->xres_virtual = info->var.xres;
243         var->yres = info->var.yres;
244
245         if ((var->bits_per_pixel != 8) && (var->bits_per_pixel != 16))
246                 var->bits_per_pixel = info->var.bits_per_pixel;
247
248         if (var->yres_virtual < var->yres)
249                 var->yres_virtual = var->yres;
250
251         maxy = info->fix.smem_len / var->xres;
252
253         if (var->bits_per_pixel == 16)
254                 maxy /= 2;
255
256         if (var->yres_virtual > maxy)
257                 var->yres_virtual = maxy;
258
259         var->xoffset = 0;
260         var->yoffset = 0;
261
262         switch (var->bits_per_pixel) {
263         case 8:
264                 var->red.offset = 0;
265                 var->red.length = 8;
266                 var->green.offset = 0;
267                 var->green.length = 8;
268                 var->blue.offset = 0;
269                 var->blue.length = 8;
270                 var->transp.offset = 0;
271                 var->transp.length = 0;
272                 break;
273         case 16:                /* RGB 565 */
274                 var->red.offset = 11;
275                 var->red.length = 5;
276                 var->green.offset = 5;
277                 var->green.length = 6;
278                 var->blue.offset = 0;
279                 var->blue.length = 5;
280                 var->transp.offset = 0;
281                 var->transp.length = 0;
282                 break;
283         }
284
285         return 0;
286 }
287
288 static int hitfb_set_par(struct fb_info *info)
289 {
290         unsigned short ldr3;
291
292         switch (info->var.bits_per_pixel) {
293         case 8:
294                 info->fix.line_length = info->var.xres;
295                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
296                 info->fix.ypanstep = 16;
297                 break;
298         case 16:
299                 info->fix.line_length = info->var.xres*2;
300                 info->fix.visual = FB_VISUAL_TRUECOLOR;
301                 info->fix.ypanstep = 8;
302                 break;
303         }
304
305         fb_writew(info->fix.line_length, HD64461_LCDCLOR);
306         ldr3 = fb_readw(HD64461_LDR3);
307         ldr3 &= ~15;
308         ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8;
309         fb_writew(ldr3, HD64461_LDR3);
310         return 0;
311 }
312
313 static const struct fb_ops hitfb_ops = {
314         .owner          = THIS_MODULE,
315         .fb_check_var   = hitfb_check_var,
316         .fb_set_par             = hitfb_set_par,
317         .fb_setcolreg   = hitfb_setcolreg,
318         .fb_blank       = hitfb_blank,
319         .fb_sync        = hitfb_sync,
320         .fb_pan_display = hitfb_pan_display,
321         .fb_fillrect    = hitfb_fillrect,
322         .fb_copyarea    = hitfb_copyarea,
323         .fb_imageblit   = cfb_imageblit,
324 };
325
326 static int hitfb_probe(struct platform_device *dev)
327 {
328         unsigned short lcdclor, ldr3, ldvndr;
329         struct fb_info *info;
330         int ret;
331
332         if (fb_get_options("hitfb", NULL))
333                 return -ENODEV;
334
335         hitfb_fix.mmio_start = HD64461_IO_OFFSET(0x1000);
336         hitfb_fix.mmio_len = 0x1000;
337         hitfb_fix.smem_start = HD64461_IO_OFFSET(0x02000000);
338         hitfb_fix.smem_len = 512 * 1024;
339
340         lcdclor = fb_readw(HD64461_LCDCLOR);
341         ldvndr = fb_readw(HD64461_LDVNDR);
342         ldr3 = fb_readw(HD64461_LDR3);
343
344         switch (ldr3 & 15) {
345         default:
346         case 4:
347                 hitfb_var.bits_per_pixel = 8;
348                 hitfb_var.xres = lcdclor;
349                 break;
350         case 8:
351                 hitfb_var.bits_per_pixel = 16;
352                 hitfb_var.xres = lcdclor / 2;
353                 break;
354         }
355         hitfb_fix.line_length = lcdclor;
356         hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ?
357             FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
358         hitfb_var.yres = ldvndr + 1;
359         hitfb_var.xres_virtual = hitfb_var.xres;
360         hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor;
361         switch (hitfb_var.bits_per_pixel) {
362         case 8:
363                 hitfb_var.red.offset = 0;
364                 hitfb_var.red.length = 8;
365                 hitfb_var.green.offset = 0;
366                 hitfb_var.green.length = 8;
367                 hitfb_var.blue.offset = 0;
368                 hitfb_var.blue.length = 8;
369                 hitfb_var.transp.offset = 0;
370                 hitfb_var.transp.length = 0;
371                 break;
372         case 16:                /* RGB 565 */
373                 hitfb_var.red.offset = 11;
374                 hitfb_var.red.length = 5;
375                 hitfb_var.green.offset = 5;
376                 hitfb_var.green.length = 6;
377                 hitfb_var.blue.offset = 0;
378                 hitfb_var.blue.length = 5;
379                 hitfb_var.transp.offset = 0;
380                 hitfb_var.transp.length = 0;
381                 break;
382         }
383
384         info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
385         if (unlikely(!info))
386                 return -ENOMEM;
387
388         info->fbops = &hitfb_ops;
389         info->var = hitfb_var;
390         info->fix = hitfb_fix;
391         info->pseudo_palette = info->par;
392         info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN |
393                 FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;
394
395         info->screen_base = (void *)hitfb_fix.smem_start;
396
397         ret = fb_alloc_cmap(&info->cmap, 256, 0);
398         if (unlikely(ret < 0))
399                 goto err_fb;
400
401         ret = register_framebuffer(info);
402         if (unlikely(ret < 0))
403                 goto err;
404
405         platform_set_drvdata(dev, info);
406
407         fb_info(info, "%s frame buffer device\n", info->fix.id);
408
409         return 0;
410
411 err:
412         fb_dealloc_cmap(&info->cmap);
413 err_fb:
414         framebuffer_release(info);
415         return ret;
416 }
417
418 static int hitfb_remove(struct platform_device *dev)
419 {
420         struct fb_info *info = platform_get_drvdata(dev);
421
422         unregister_framebuffer(info);
423         fb_dealloc_cmap(&info->cmap);
424         framebuffer_release(info);
425
426         return 0;
427 }
428
429 static int hitfb_suspend(struct device *dev)
430 {
431         u16 v;
432
433         hitfb_blank(1,0);
434         v = fb_readw(HD64461_STBCR);
435         v |= HD64461_STBCR_SLCKE_IST;
436         fb_writew(v, HD64461_STBCR);
437
438         return 0;
439 }
440
441 static int hitfb_resume(struct device *dev)
442 {
443         u16 v;
444
445         v = fb_readw(HD64461_STBCR);
446         v &= ~HD64461_STBCR_SLCKE_OST;
447         msleep(100);
448         v = fb_readw(HD64461_STBCR);
449         v &= ~HD64461_STBCR_SLCKE_IST;
450         fb_writew(v, HD64461_STBCR);
451         hitfb_blank(0,0);
452
453         return 0;
454 }
455
456 static const struct dev_pm_ops hitfb_dev_pm_ops = {
457         .suspend        = hitfb_suspend,
458         .resume         = hitfb_resume,
459 };
460
461 static struct platform_driver hitfb_driver = {
462         .probe          = hitfb_probe,
463         .remove         = hitfb_remove,
464         .driver         = {
465                 .name   = "hitfb",
466                 .pm     = &hitfb_dev_pm_ops,
467         },
468 };
469
470 static struct platform_device hitfb_device = {
471         .name   = "hitfb",
472         .id     = -1,
473 };
474
475 static int __init hitfb_init(void)
476 {
477         int ret;
478
479         ret = platform_driver_register(&hitfb_driver);
480         if (!ret) {
481                 ret = platform_device_register(&hitfb_device);
482                 if (ret)
483                         platform_driver_unregister(&hitfb_driver);
484         }
485         return ret;
486 }
487
488
489 static void __exit hitfb_exit(void)
490 {
491         platform_device_unregister(&hitfb_device);
492         platform_driver_unregister(&hitfb_driver);
493 }
494
495 module_init(hitfb_init);
496 module_exit(hitfb_exit);
497
498 MODULE_LICENSE("GPL");