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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
32static struct fb_var_screeninfo hitfb_var = {
33 .activate = FB_ACTIVATE_NOW,
34 .height = -1,
35 .width = -1,
36 .vmode = FB_VMODE_NONINTERLACED,
37};
38
39static struct fb_fix_screeninfo hitfb_fix = {
40 .id = "Hitachi HD64461",
41 .type = FB_TYPE_PACKED_PIXELS,
42 .accel = FB_ACCEL_NONE,
43};
44
45static volatile void __iomem *hitfb_offset_to_addr(unsigned int offset)
46{
47 return (__force volatile void __iomem *)(uintptr_t)offset;
48}
49
50static u16 hitfb_readw(unsigned int offset)
51{
52 return fb_readw(hitfb_offset_to_addr(offset));
53}
54
55static void hitfb_writew(u16 value, unsigned int offset)
56{
57 fb_writew(value, hitfb_offset_to_addr(offset));
58}
59
60static inline void hitfb_accel_wait(void)
61{
62 while (hitfb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS)
63 ;
64}
65
66static inline void hitfb_accel_start(int truecolor)
67{
68 if (truecolor) {
69 hitfb_writew(6, HD64461_GRCFGR);
70 } else {
71 hitfb_writew(7, HD64461_GRCFGR);
72 }
73}
74
75static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
76 u16 width, u16 height)
77{
78 u32 saddr = WIDTH * dy + dx;
79 if (truecolor)
80 saddr <<= 1;
81
82 hitfb_writew(width-1, HD64461_BBTDWR);
83 hitfb_writew(height-1, HD64461_BBTDHR);
84
85 hitfb_writew(saddr & 0xffff, HD64461_BBTDSARL);
86 hitfb_writew(saddr >> 16, HD64461_BBTDSARH);
87
88}
89
90static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
91 u16 dy, u16 width, u16 height, u16 rop,
92 u32 mask_addr)
93{
94 u32 saddr, daddr;
95 u32 maddr = 0;
96
97 height--;
98 width--;
99 hitfb_writew(rop, HD64461_BBTROPR);
100 if ((sy < dy) || ((sy == dy) && (sx <= dx))) {
101 saddr = WIDTH * (sy + height) + sx + width;
102 daddr = WIDTH * (dy + height) + dx + width;
103 if (mask_addr) {
104 if (truecolor)
105 maddr = ((width >> 3) + 1) * (height + 1) - 1;
106 else
107 maddr =
108 (((width >> 4) + 1) * (height + 1) - 1) * 2;
109
110 hitfb_writew((1 << 5) | 1, HD64461_BBTMDR);
111 } else
112 hitfb_writew(1, HD64461_BBTMDR);
113 } else {
114 saddr = WIDTH * sy + sx;
115 daddr = WIDTH * dy + dx;
116 if (mask_addr) {
117 hitfb_writew((1 << 5), HD64461_BBTMDR);
118 } else {
119 hitfb_writew(0, HD64461_BBTMDR);
120 }
121 }
122 if (truecolor) {
123 saddr <<= 1;
124 daddr <<= 1;
125 }
126 hitfb_writew(width, HD64461_BBTDWR);
127 hitfb_writew(height, HD64461_BBTDHR);
128 hitfb_writew(saddr & 0xffff, HD64461_BBTSSARL);
129 hitfb_writew(saddr >> 16, HD64461_BBTSSARH);
130 hitfb_writew(daddr & 0xffff, HD64461_BBTDSARL);
131 hitfb_writew(daddr >> 16, HD64461_BBTDSARH);
132 if (mask_addr) {
133 maddr += mask_addr;
134 hitfb_writew(maddr & 0xffff, HD64461_BBTMARL);
135 hitfb_writew(maddr >> 16, HD64461_BBTMARH);
136 }
137 hitfb_accel_start(truecolor);
138}
139
140static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
141{
142 if (rect->rop != ROP_COPY)
143 cfb_fillrect(p, rect);
144 else {
145 hitfb_accel_wait();
146 hitfb_writew(0x00f0, HD64461_BBTROPR);
147 hitfb_writew(16, HD64461_BBTMDR);
148
149 if (p->var.bits_per_pixel == 16) {
150 hitfb_writew(((u32 *) (p->pseudo_palette))[rect->color],
151 HD64461_GRSCR);
152 hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
153 rect->height);
154 hitfb_accel_start(1);
155 } else {
156 hitfb_writew(rect->color, HD64461_GRSCR);
157 hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
158 rect->height);
159 hitfb_accel_start(0);
160 }
161 }
162}
163
164static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
165{
166 hitfb_accel_wait();
167 hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
168 area->dx, area->dy, area->width, area->height,
169 0x00cc, 0);
170}
171
172static int hitfb_pan_display(struct fb_var_screeninfo *var,
173 struct fb_info *info)
174{
175 int xoffset = var->xoffset;
176 int yoffset = var->yoffset;
177
178 if (xoffset != 0)
179 return -EINVAL;
180
181 hitfb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR);
182
183 return 0;
184}
185
186static int hitfb_blank(int blank_mode, struct fb_info *info)
187{
188 unsigned short v;
189
190 if (blank_mode) {
191 v = hitfb_readw(HD64461_LDR1);
192 v &= ~HD64461_LDR1_DON;
193 hitfb_writew(v, HD64461_LDR1);
194
195 v = hitfb_readw(HD64461_LCDCCR);
196 v |= HD64461_LCDCCR_MOFF;
197 hitfb_writew(v, HD64461_LCDCCR);
198
199 v = hitfb_readw(HD64461_STBCR);
200 v |= HD64461_STBCR_SLCDST;
201 hitfb_writew(v, HD64461_STBCR);
202 } else {
203 v = hitfb_readw(HD64461_STBCR);
204 v &= ~HD64461_STBCR_SLCDST;
205 hitfb_writew(v, HD64461_STBCR);
206
207 v = hitfb_readw(HD64461_LCDCCR);
208 v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ);
209 hitfb_writew(v, HD64461_LCDCCR);
210
211 do {
212 v = hitfb_readw(HD64461_LCDCCR);
213 } while(v&HD64461_LCDCCR_STBACK);
214
215 v = hitfb_readw(HD64461_LDR1);
216 v |= HD64461_LDR1_DON;
217 hitfb_writew(v, HD64461_LDR1);
218 }
219 return 0;
220}
221
222static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
223 unsigned blue, unsigned transp, struct fb_info *info)
224{
225 if (regno >= 256)
226 return 1;
227
228 switch (info->var.bits_per_pixel) {
229 case 8:
230 hitfb_writew(regno << 8, HD64461_CPTWAR);
231 hitfb_writew(red >> 10, HD64461_CPTWDR);
232 hitfb_writew(green >> 10, HD64461_CPTWDR);
233 hitfb_writew(blue >> 10, HD64461_CPTWDR);
234 break;
235 case 16:
236 if (regno >= 16)
237 return 1;
238 ((u32 *) (info->pseudo_palette))[regno] =
239 ((red & 0xf800)) |
240 ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
241 break;
242 }
243 return 0;
244}
245
246static int hitfb_sync(struct fb_info *info)
247{
248 hitfb_accel_wait();
249
250 return 0;
251}
252
253static int hitfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
254{
255 int maxy;
256
257 var->xres = info->var.xres;
258 var->xres_virtual = info->var.xres;
259 var->yres = info->var.yres;
260
261 if ((var->bits_per_pixel != 8) && (var->bits_per_pixel != 16))
262 var->bits_per_pixel = info->var.bits_per_pixel;
263
264 if (var->yres_virtual < var->yres)
265 var->yres_virtual = var->yres;
266
267 maxy = info->fix.smem_len / var->xres;
268
269 if (var->bits_per_pixel == 16)
270 maxy /= 2;
271
272 if (var->yres_virtual > maxy)
273 var->yres_virtual = maxy;
274
275 var->xoffset = 0;
276 var->yoffset = 0;
277
278 switch (var->bits_per_pixel) {
279 case 8:
280 var->red.offset = 0;
281 var->red.length = 8;
282 var->green.offset = 0;
283 var->green.length = 8;
284 var->blue.offset = 0;
285 var->blue.length = 8;
286 var->transp.offset = 0;
287 var->transp.length = 0;
288 break;
289 case 16: /* RGB 565 */
290 var->red.offset = 11;
291 var->red.length = 5;
292 var->green.offset = 5;
293 var->green.length = 6;
294 var->blue.offset = 0;
295 var->blue.length = 5;
296 var->transp.offset = 0;
297 var->transp.length = 0;
298 break;
299 }
300
301 return 0;
302}
303
304static int hitfb_set_par(struct fb_info *info)
305{
306 unsigned short ldr3;
307
308 switch (info->var.bits_per_pixel) {
309 case 8:
310 info->fix.line_length = info->var.xres;
311 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
312 info->fix.ypanstep = 16;
313 break;
314 case 16:
315 info->fix.line_length = info->var.xres*2;
316 info->fix.visual = FB_VISUAL_TRUECOLOR;
317 info->fix.ypanstep = 8;
318 break;
319 }
320
321 hitfb_writew(info->fix.line_length, HD64461_LCDCLOR);
322 ldr3 = hitfb_readw(HD64461_LDR3);
323 ldr3 &= ~15;
324 ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8;
325 hitfb_writew(ldr3, HD64461_LDR3);
326 return 0;
327}
328
329static const struct fb_ops hitfb_ops = {
330 .owner = THIS_MODULE,
331 __FB_DEFAULT_IOMEM_OPS_RDWR,
332 .fb_check_var = hitfb_check_var,
333 .fb_set_par = hitfb_set_par,
334 .fb_setcolreg = hitfb_setcolreg,
335 .fb_blank = hitfb_blank,
336 .fb_sync = hitfb_sync,
337 .fb_pan_display = hitfb_pan_display,
338 .fb_fillrect = hitfb_fillrect,
339 .fb_copyarea = hitfb_copyarea,
340 .fb_imageblit = cfb_imageblit,
341 __FB_DEFAULT_IOMEM_OPS_MMAP,
342};
343
344static int hitfb_probe(struct platform_device *dev)
345{
346 unsigned short lcdclor, ldr3, ldvndr;
347 struct fb_info *info;
348 int ret;
349
350 if (fb_get_options("hitfb", NULL))
351 return -ENODEV;
352
353 hitfb_fix.mmio_start = HD64461_IO_OFFSET(0x1000);
354 hitfb_fix.mmio_len = 0x1000;
355 hitfb_fix.smem_start = HD64461_IO_OFFSET(0x02000000);
356 hitfb_fix.smem_len = 512 * 1024;
357
358 lcdclor = hitfb_readw(HD64461_LCDCLOR);
359 ldvndr = hitfb_readw(HD64461_LDVNDR);
360 ldr3 = hitfb_readw(HD64461_LDR3);
361
362 switch (ldr3 & 15) {
363 default:
364 case 4:
365 hitfb_var.bits_per_pixel = 8;
366 hitfb_var.xres = lcdclor;
367 break;
368 case 8:
369 hitfb_var.bits_per_pixel = 16;
370 hitfb_var.xres = lcdclor / 2;
371 break;
372 }
373 hitfb_fix.line_length = lcdclor;
374 hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ?
375 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
376 hitfb_var.yres = ldvndr + 1;
377 hitfb_var.xres_virtual = hitfb_var.xres;
378 hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor;
379 switch (hitfb_var.bits_per_pixel) {
380 case 8:
381 hitfb_var.red.offset = 0;
382 hitfb_var.red.length = 8;
383 hitfb_var.green.offset = 0;
384 hitfb_var.green.length = 8;
385 hitfb_var.blue.offset = 0;
386 hitfb_var.blue.length = 8;
387 hitfb_var.transp.offset = 0;
388 hitfb_var.transp.length = 0;
389 break;
390 case 16: /* RGB 565 */
391 hitfb_var.red.offset = 11;
392 hitfb_var.red.length = 5;
393 hitfb_var.green.offset = 5;
394 hitfb_var.green.length = 6;
395 hitfb_var.blue.offset = 0;
396 hitfb_var.blue.length = 5;
397 hitfb_var.transp.offset = 0;
398 hitfb_var.transp.length = 0;
399 break;
400 }
401
402 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
403 if (unlikely(!info))
404 return -ENOMEM;
405
406 info->fbops = &hitfb_ops;
407 info->var = hitfb_var;
408 info->fix = hitfb_fix;
409 info->pseudo_palette = info->par;
410 info->flags = FBINFO_HWACCEL_YPAN |
411 FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;
412
413 info->screen_base = (char __iomem *)(uintptr_t)hitfb_fix.smem_start;
414
415 ret = fb_alloc_cmap(&info->cmap, 256, 0);
416 if (unlikely(ret < 0))
417 goto err_fb;
418
419 ret = register_framebuffer(info);
420 if (unlikely(ret < 0))
421 goto err;
422
423 platform_set_drvdata(dev, info);
424
425 fb_info(info, "%s frame buffer device\n", info->fix.id);
426
427 return 0;
428
429err:
430 fb_dealloc_cmap(&info->cmap);
431err_fb:
432 framebuffer_release(info);
433 return ret;
434}
435
436static void hitfb_remove(struct platform_device *dev)
437{
438 struct fb_info *info = platform_get_drvdata(dev);
439
440 unregister_framebuffer(info);
441 fb_dealloc_cmap(&info->cmap);
442 framebuffer_release(info);
443}
444
445static int hitfb_suspend(struct device *dev)
446{
447 u16 v;
448
449 hitfb_blank(1, NULL);
450 v = hitfb_readw(HD64461_STBCR);
451 v |= HD64461_STBCR_SLCKE_IST;
452 hitfb_writew(v, HD64461_STBCR);
453
454 return 0;
455}
456
457static int hitfb_resume(struct device *dev)
458{
459 u16 v;
460
461 v = hitfb_readw(HD64461_STBCR);
462 v &= ~HD64461_STBCR_SLCKE_OST;
463 msleep(100);
464 v = hitfb_readw(HD64461_STBCR);
465 v &= ~HD64461_STBCR_SLCKE_IST;
466 hitfb_writew(v, HD64461_STBCR);
467 hitfb_blank(0, NULL);
468
469 return 0;
470}
471
472static const struct dev_pm_ops hitfb_dev_pm_ops = {
473 .suspend = hitfb_suspend,
474 .resume = hitfb_resume,
475};
476
477static struct platform_driver hitfb_driver = {
478 .probe = hitfb_probe,
479 .remove = hitfb_remove,
480 .driver = {
481 .name = "hitfb",
482 .pm = &hitfb_dev_pm_ops,
483 },
484};
485
486static struct platform_device hitfb_device = {
487 .name = "hitfb",
488 .id = -1,
489};
490
491static int __init hitfb_init(void)
492{
493 int ret;
494
495 ret = platform_driver_register(&hitfb_driver);
496 if (!ret) {
497 ret = platform_device_register(&hitfb_device);
498 if (ret)
499 platform_driver_unregister(&hitfb_driver);
500 }
501 return ret;
502}
503
504
505static void __exit hitfb_exit(void)
506{
507 platform_device_unregister(&hitfb_device);
508 platform_driver_unregister(&hitfb_driver);
509}
510
511module_init(hitfb_init);
512module_exit(hitfb_exit);
513
514MODULE_LICENSE("GPL");