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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/pgtable.h>
27#include <asm/io.h>
28#include <asm/hd64461.h>
29#include <cpu/dac.h>
30
31#define WIDTH 640
32
33static struct fb_var_screeninfo hitfb_var = {
34 .activate = FB_ACTIVATE_NOW,
35 .height = -1,
36 .width = -1,
37 .vmode = FB_VMODE_NONINTERLACED,
38};
39
40static struct fb_fix_screeninfo hitfb_fix = {
41 .id = "Hitachi HD64461",
42 .type = FB_TYPE_PACKED_PIXELS,
43 .accel = FB_ACCEL_NONE,
44};
45
46static inline void hitfb_accel_wait(void)
47{
48 while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
49}
50
51static 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
60static 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
75static 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
125static 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
149static 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
157static 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
171int 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
207static 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
231static int hitfb_sync(struct fb_info *info)
232{
233 hitfb_accel_wait();
234
235 return 0;
236}
237
238static 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:
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
289static 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
314static 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
327static int 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:
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 fb_info(info, "%s frame buffer device\n", info->fix.id);
409
410 return 0;
411
412err:
413 fb_dealloc_cmap(&info->cmap);
414err_fb:
415 framebuffer_release(info);
416 return ret;
417}
418
419static int hitfb_remove(struct platform_device *dev)
420{
421 struct fb_info *info = platform_get_drvdata(dev);
422
423 unregister_framebuffer(info);
424 fb_dealloc_cmap(&info->cmap);
425 framebuffer_release(info);
426
427 return 0;
428}
429
430static int hitfb_suspend(struct device *dev)
431{
432 u16 v;
433
434 hitfb_blank(1,0);
435 v = fb_readw(HD64461_STBCR);
436 v |= HD64461_STBCR_SLCKE_IST;
437 fb_writew(v, HD64461_STBCR);
438
439 return 0;
440}
441
442static int hitfb_resume(struct device *dev)
443{
444 u16 v;
445
446 v = fb_readw(HD64461_STBCR);
447 v &= ~HD64461_STBCR_SLCKE_OST;
448 msleep(100);
449 v = fb_readw(HD64461_STBCR);
450 v &= ~HD64461_STBCR_SLCKE_IST;
451 fb_writew(v, HD64461_STBCR);
452 hitfb_blank(0,0);
453
454 return 0;
455}
456
457static const struct dev_pm_ops hitfb_dev_pm_ops = {
458 .suspend = hitfb_suspend,
459 .resume = hitfb_resume,
460};
461
462static struct platform_driver hitfb_driver = {
463 .probe = hitfb_probe,
464 .remove = hitfb_remove,
465 .driver = {
466 .name = "hitfb",
467 .pm = &hitfb_dev_pm_ops,
468 },
469};
470
471static struct platform_device hitfb_device = {
472 .name = "hitfb",
473 .id = -1,
474};
475
476static int __init hitfb_init(void)
477{
478 int ret;
479
480 ret = platform_driver_register(&hitfb_driver);
481 if (!ret) {
482 ret = platform_device_register(&hitfb_device);
483 if (ret)
484 platform_driver_unregister(&hitfb_driver);
485 }
486 return ret;
487}
488
489
490static void __exit hitfb_exit(void)
491{
492 platform_device_unregister(&hitfb_device);
493 platform_driver_unregister(&hitfb_driver);
494}
495
496module_init(hitfb_init);
497module_exit(hitfb_exit);
498
499MODULE_LICENSE("GPL");
500
