summaryrefslogtreecommitdiffstats
path: root/drivers/video/hitfb.c
blob: 020db7fc9153ab1f3483909ccd02f76b9e455900 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
/*
 * linux/drivers/video/hitfb.c -- Hitachi LCD frame buffer device
 *
 * (C) 1999 Mihai Spatar
 * (C) 2000 YAEGASHI Takeshi
 * (C) 2003, 2004 Paul Mundt
 * (C) 2003, 2004, 2006 Andriy Skulysh
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License. See the file COPYING in the main directory of this archive for
 *  more details.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/fb.h>

#include <asm/machvec.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/hd64461.h>
#include <cpu/dac.h>

#define	WIDTH 640

static struct fb_var_screeninfo hitfb_var __initdata = {
	.activate	= FB_ACTIVATE_NOW,
	.height		= -1,
	.width		= -1,
	.vmode		= FB_VMODE_NONINTERLACED,
};

static struct fb_fix_screeninfo hitfb_fix __initdata = {
	.id		= "Hitachi HD64461",
	.type		= FB_TYPE_PACKED_PIXELS,
	.accel		= FB_ACCEL_NONE,
};

static u32 pseudo_palette[16];
static struct fb_info fb_info;

static inline void hitfb_accel_wait(void)
{
	while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
}

static inline void hitfb_accel_start(int truecolor)
{
	if (truecolor) {
		fb_writew(6, HD64461_GRCFGR);
	} else {
		fb_writew(7, HD64461_GRCFGR);
	}
}

static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
					u16 width, u16 height)
{
	u32 saddr = WIDTH * dy + dx;
	if (truecolor)
		saddr <<= 1;

	fb_writew(width-1, HD64461_BBTDWR);
	fb_writew(height-1, HD64461_BBTDHR);

	fb_writew(saddr & 0xffff, HD64461_BBTDSARL);
	fb_writew(saddr >> 16, HD64461_BBTDSARH);

}

static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
				      u16 dy, u16 width, u16 height, u16 rop,
				      u32 mask_addr)
{
	u32 saddr, daddr;
	u32 maddr = 0;

	height--;
	width--;
	fb_writew(rop, HD64461_BBTROPR);
	if ((sy < dy) || ((sy == dy) && (sx <= dx))) {
		saddr = WIDTH * (sy + height) + sx + width;
		daddr = WIDTH * (dy + height) + dx + width;
		if (mask_addr) {
			if (truecolor)
				maddr = ((width >> 3) + 1) * (height + 1) - 1;
			else
				maddr =
				    (((width >> 4) + 1) * (height + 1) - 1) * 2;

			fb_writew((1 << 5) | 1, HD64461_BBTMDR);
		} else
			fb_writew(1, HD64461_BBTMDR);
	} else {
		saddr = WIDTH * sy + sx;
		daddr = WIDTH * dy + dx;
		if (mask_addr) {
			fb_writew((1 << 5), HD64461_BBTMDR);
		} else {
			fb_writew(0, HD64461_BBTMDR);
		}
	}
	if (truecolor) {
		saddr <<= 1;
		daddr <<= 1;
	}
	fb_writew(width, HD64461_BBTDWR);
	fb_writew(height, HD64461_BBTDHR);
	fb_writew(saddr & 0xffff, HD64461_BBTSSARL);
	fb_writew(saddr >> 16, HD64461_BBTSSARH);
	fb_writew(daddr & 0xffff, HD64461_BBTDSARL);
	fb_writew(daddr >> 16, HD64461_BBTDSARH);
	if (mask_addr) {
		maddr += mask_addr;
		fb_writew(maddr & 0xffff, HD64461_BBTMARL);
		fb_writew(maddr >> 16, HD64461_BBTMARH);
	}
	hitfb_accel_start(truecolor);
}

static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
{
	if (rect->rop != ROP_COPY)
		cfb_fillrect(p, rect);
	else {
		hitfb_accel_wait();
		fb_writew(0x00f0, HD64461_BBTROPR);
		fb_writew(16, HD64461_BBTMDR);

		if (p->var.bits_per_pixel == 16) {
			fb_writew(((u32 *) (p->pseudo_palette))[rect->color],
				  HD64461_GRSCR);
			hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
					     rect->height);
			hitfb_accel_start(1);
		} else {
			fb_writew(rect->color, HD64461_GRSCR);
			hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
					     rect->height);
			hitfb_accel_start(0);
		}
	}
}

static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
{
	hitfb_accel_wait();
	hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
			   area->dx, area->dy, area->width, area->height,
			   0x00cc, 0);
}

static int hitfb_pan_display(struct fb_var_screeninfo *var,
			     struct fb_info *info)
{
	int xoffset = var->xoffset;
	int yoffset = var->yoffset;

	if (xoffset != 0)
		return -EINVAL;

	fb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR);

	return 0;
}

int hitfb_blank(int blank_mode, struct fb_info *info)
{
	unsigned short v;

	if (blank_mode) {
		v = fb_readw(HD64461_LDR1);
		v &= ~HD64461_LDR1_DON;
		fb_writew(v, HD64461_LDR1);

		v = fb_readw(HD64461_LCDCCR);
		v |= HD64461_LCDCCR_MOFF;
		fb_writew(v, HD64461_LCDCCR);

		v = fb_readw(HD64461_STBCR);
		v |= HD64461_STBCR_SLCDST;
		fb_writew(v, HD64461_STBCR);
	} else {
		v = fb_readw(HD64461_STBCR);
		v &= ~HD64461_STBCR_SLCDST;
		fb_writew(v, HD64461_STBCR);

		v = fb_readw(HD64461_LCDCCR);
		v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ);
		fb_writew(v, HD64461_LCDCCR);

		do {
		    v = fb_readw(HD64461_LCDCCR);
		} while(v&HD64461_LCDCCR_STBACK);

		v = fb_readw(HD64461_LDR1);
		v |= HD64461_LDR1_DON;
		fb_writew(v, HD64461_LDR1);
	}
	return 0;
}

static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
			   unsigned blue, unsigned transp, struct fb_info *info)
{
	if (regno >= 256)
		return 1;

	switch (info->var.bits_per_pixel) {
	case 8:
		fb_writew(regno << 8, HD64461_CPTWAR);
		fb_writew(red >> 10, HD64461_CPTWDR);
		fb_writew(green >> 10, HD64461_CPTWDR);
		fb_writew(blue >> 10, HD64461_CPTWDR);
		break;
	case 16:
		if (regno >= 16)
			return 1;
		((u32 *) (info->pseudo_palette))[regno] =
		    ((red & 0xf800)) |
		    ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
		break;
	}
	return 0;
}

static int hitfb_sync(struct fb_info *info)
{
	hitfb_accel_wait();

	return 0;
}

static int hitfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
	int maxy;

	var->xres = info->var.xres;
	var->xres_virtual = info->var.xres;
	var->yres = info->var.yres;

	if ((var->bits_per_pixel != 8) && (var->bits_per_pixel != 16))
		var->bits_per_pixel = info->var.bits_per_pixel;

	if (var->yres_virtual < var->yres)
		var->yres_virtual = var->yres;

	maxy = info->fix.smem_len / var->xres;

	if (var->bits_per_pixel == 16)
		maxy /= 2;

	if (var->yres_virtual > maxy)
		var->yres_virtual = maxy;

	var->xoffset = 0;
	var->yoffset = 0;

	switch (var->bits_per_pixel) {
	case 8:
		var->red.offset = 0;
		var->red.length = 8;
		var->green.offset = 0;
		var->green.length = 8;
		var->blue.offset = 0;
		var->blue.length = 8;
		var->transp.offset = 0;
		var->transp.length = 0;
		break;
	case 16:		/* RGB 565 */
		var->red.offset = 11;
		var->red.length = 5;
		var->green.offset = 5;
		var->green.length = 6;
		var->blue.offset = 0;
		var->blue.length = 5;
		var->transp.offset = 0;
		var->transp.length = 0;
		break;
	}

	return 0;
}

static int hitfb_set_par(struct fb_info *info)
{
	unsigned short ldr3;

	switch (info->var.bits_per_pixel) {
	case 8:
		info->fix.line_length = info->var.xres;
		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
		info->fix.ypanstep = 16;
		break;
	case 16:
		info->fix.line_length = info->var.xres*2;
		info->fix.visual = FB_VISUAL_TRUECOLOR;
		info->fix.ypanstep = 8;
		break;
	}

	fb_writew(info->fix.line_length, HD64461_LCDCLOR);
	ldr3 = fb_readw(HD64461_LDR3);
	ldr3 &= ~15;
	ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8;
	fb_writew(ldr3, HD64461_LDR3);
	return 0;
}

static struct fb_ops hitfb_ops = {
	.owner		= THIS_MODULE,
	.fb_check_var	= hitfb_check_var,
	.fb_set_par		= hitfb_set_par,
	.fb_setcolreg	= hitfb_setcolreg,
	.fb_blank	= hitfb_blank,
	.fb_sync	= hitfb_sync,
	.fb_pan_display = hitfb_pan_display,
	.fb_fillrect	= hitfb_fillrect,
	.fb_copyarea	= hitfb_copyarea,
	.fb_imageblit	= cfb_imageblit,
};

static int __init hitfb_probe(struct platform_device *dev)
{
	unsigned short lcdclor, ldr3, ldvndr;

	if (fb_get_options("hitfb", NULL))
		return -ENODEV;

	hitfb_fix.mmio_start = HD64461_IO_OFFSET(0x1000);
	hitfb_fix.mmio_len = 0x1000;
	hitfb_fix.smem_start = HD64461_IO_OFFSET(0x02000000);
	hitfb_fix.smem_len = 512 * 1024;

	lcdclor = fb_readw(HD64461_LCDCLOR);
	ldvndr = fb_readw(HD64461_LDVNDR);
	ldr3 = fb_readw(HD64461_LDR3);

	switch (ldr3 & 15) {
	default:
	case 4:
		hitfb_var.bits_per_pixel = 8;
		hitfb_var.xres = lcdclor;
		break;
	case 8:
		hitfb_var.bits_per_pixel = 16;
		hitfb_var.xres = lcdclor / 2;
		break;
	}
	hitfb_fix.line_length = lcdclor;
	hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ?
	    FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
	hitfb_var.yres = ldvndr + 1;
	hitfb_var.xres_virtual = hitfb_var.xres;
	hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor;
	switch (hitfb_var.bits_per_pixel) {
	case 8:
		hitfb_var.red.offset = 0;
		hitfb_var.red.length = 8;
		hitfb_var.green.offset = 0;
		hitfb_var.green.length = 8;
		hitfb_var.blue.offset = 0;
		hitfb_var.blue.length = 8;
		hitfb_var.transp.offset = 0;
		hitfb_var.transp.length = 0;
		break;
	case 16:		/* RGB 565 */
		hitfb_var.red.offset = 11;
		hitfb_var.red.length = 5;
		hitfb_var.green.offset = 5;
		hitfb_var.green.length = 6;
		hitfb_var.blue.offset = 0;
		hitfb_var.blue.length = 5;
		hitfb_var.transp.offset = 0;
		hitfb_var.transp.length = 0;
		break;
	}

	fb_info.fbops = &hitfb_ops;
	fb_info.var = hitfb_var;
	fb_info.fix = hitfb_fix;
	fb_info.pseudo_palette = pseudo_palette;
	fb_info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN |
		FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;

	fb_info.screen_base = (void *)hitfb_fix.smem_start;

	fb_alloc_cmap(&fb_info.cmap, 256, 0);

	if (register_framebuffer(&fb_info) < 0)
		return -EINVAL;

	printk(KERN_INFO "fb%d: %s frame buffer device\n",
	       fb_info.node, fb_info.fix.id);
	return 0;
}

static int __exit hitfb_remove(struct platform_device *dev)
{
	return unregister_framebuffer(&fb_info);
}

#ifdef CONFIG_PM
static int hitfb_suspend(struct platform_device *dev, pm_message_t state)
{
	u16 v;

	hitfb_blank(1,0);
	v = fb_readw(HD64461_STBCR);
	v |= HD64461_STBCR_SLCKE_IST;
	fb_writew(v, HD64461_STBCR);

	return 0;
}

static int hitfb_resume(struct platform_device *dev)
{
	u16 v;

	v = fb_readw(HD64461_STBCR);
	v &= ~HD64461_STBCR_SLCKE_OST;
	msleep(100);
	v = fb_readw(HD64461_STBCR);
	v &= ~HD64461_STBCR_SLCKE_IST;
	fb_writew(v, HD64461_STBCR);
	hitfb_blank(0,0);

	return 0;
}
#endif

static struct platform_driver hitfb_driver = {
	.probe		= hitfb_probe,
	.remove		= __exit_p(hitfb_remove),
#ifdef CONFIG_PM
	.suspend	= hitfb_suspend,
	.resume		= hitfb_resume,
#endif
	.driver		= {
		.name	= "hitfb",
	},
};

static struct platform_device hitfb_device = {
	.name	= "hitfb",
	.id	= -1,
};

static int __init hitfb_init(void)
{
	int ret;

	ret = platform_driver_register(&hitfb_driver);
	if (!ret) {
		ret = platform_device_register(&hitfb_device);
		if (ret)
			platform_driver_unregister(&hitfb_driver);
	}
	return ret;
}


static void __exit hitfb_exit(void)
{
	platform_device_unregister(&hitfb_device);
	platform_driver_unregister(&hitfb_driver);
}

module_init(hitfb_init);
module_exit(hitfb_exit);

MODULE_LICENSE("GPL");