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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/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 inline void hitfb_accel_wait(void)
46{
47 while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
48}
49
50static 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
59static 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
74static 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
124static 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
148static 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
156static 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
170int 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
206static 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
230static int hitfb_sync(struct fb_info *info)
231{
232 hitfb_accel_wait();
233
234 return 0;
235}
236
237static 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:
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
288static 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
313static 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
326static 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:
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
411err:
412 fb_dealloc_cmap(&info->cmap);
413err_fb:
414 framebuffer_release(info);
415 return ret;
416}
417
418static 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
429static 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
441static 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
456static const struct dev_pm_ops hitfb_dev_pm_ops = {
457 .suspend = hitfb_suspend,
458 .resume = hitfb_resume,
459};
460
461static 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
470static struct platform_device hitfb_device = {
471 .name = "hitfb",
472 .id = -1,
473};
474
475static 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
489static void __exit hitfb_exit(void)
490{
491 platform_device_unregister(&hitfb_device);
492 platform_driver_unregister(&hitfb_driver);
493}
494
495module_init(hitfb_init);
496module_exit(hitfb_exit);
497
498MODULE_LICENSE("GPL");
499
