2 * linux/drivers/video/hitfb.c -- Hitachi LCD frame buffer device
4 * (C) 1999 Mihai Spatar
5 * (C) 2000 YAEGASHI Takeshi
6 * (C) 2003, 2004 Paul Mundt
7 * (C) 2003, 2004, 2006 Andriy Skulysh
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
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/errno.h>
17 #include <linux/string.h>
19 #include <linux/delay.h>
20 #include <linux/init.h>
21 #include <linux/platform_device.h>
24 #include <asm/machvec.h>
25 #include <linux/uaccess.h>
27 #include <asm/hd64461.h>
32 static struct fb_var_screeninfo hitfb_var = {
33 .activate = FB_ACTIVATE_NOW,
36 .vmode = FB_VMODE_NONINTERLACED,
39 static struct fb_fix_screeninfo hitfb_fix = {
40 .id = "Hitachi HD64461",
41 .type = FB_TYPE_PACKED_PIXELS,
42 .accel = FB_ACCEL_NONE,
45 static inline void hitfb_accel_wait(void)
47 while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
50 static inline void hitfb_accel_start(int truecolor)
53 fb_writew(6, HD64461_GRCFGR);
55 fb_writew(7, HD64461_GRCFGR);
59 static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
60 u16 width, u16 height)
62 u32 saddr = WIDTH * dy + dx;
66 fb_writew(width-1, HD64461_BBTDWR);
67 fb_writew(height-1, HD64461_BBTDHR);
69 fb_writew(saddr & 0xffff, HD64461_BBTDSARL);
70 fb_writew(saddr >> 16, HD64461_BBTDSARH);
74 static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
75 u16 dy, u16 width, u16 height, u16 rop,
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;
89 maddr = ((width >> 3) + 1) * (height + 1) - 1;
92 (((width >> 4) + 1) * (height + 1) - 1) * 2;
94 fb_writew((1 << 5) | 1, HD64461_BBTMDR);
96 fb_writew(1, HD64461_BBTMDR);
98 saddr = WIDTH * sy + sx;
99 daddr = WIDTH * dy + dx;
101 fb_writew((1 << 5), HD64461_BBTMDR);
103 fb_writew(0, HD64461_BBTMDR);
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);
118 fb_writew(maddr & 0xffff, HD64461_BBTMARL);
119 fb_writew(maddr >> 16, HD64461_BBTMARH);
121 hitfb_accel_start(truecolor);
124 static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
126 if (rect->rop != ROP_COPY)
127 cfb_fillrect(p, rect);
130 fb_writew(0x00f0, HD64461_BBTROPR);
131 fb_writew(16, HD64461_BBTMDR);
133 if (p->var.bits_per_pixel == 16) {
134 fb_writew(((u32 *) (p->pseudo_palette))[rect->color],
136 hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
138 hitfb_accel_start(1);
140 fb_writew(rect->color, HD64461_GRSCR);
141 hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
143 hitfb_accel_start(0);
148 static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
151 hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
152 area->dx, area->dy, area->width, area->height,
156 static int hitfb_pan_display(struct fb_var_screeninfo *var,
157 struct fb_info *info)
159 int xoffset = var->xoffset;
160 int yoffset = var->yoffset;
165 fb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR);
170 int hitfb_blank(int blank_mode, struct fb_info *info)
175 v = fb_readw(HD64461_LDR1);
176 v &= ~HD64461_LDR1_DON;
177 fb_writew(v, HD64461_LDR1);
179 v = fb_readw(HD64461_LCDCCR);
180 v |= HD64461_LCDCCR_MOFF;
181 fb_writew(v, HD64461_LCDCCR);
183 v = fb_readw(HD64461_STBCR);
184 v |= HD64461_STBCR_SLCDST;
185 fb_writew(v, HD64461_STBCR);
187 v = fb_readw(HD64461_STBCR);
188 v &= ~HD64461_STBCR_SLCDST;
189 fb_writew(v, HD64461_STBCR);
191 v = fb_readw(HD64461_LCDCCR);
192 v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ);
193 fb_writew(v, HD64461_LCDCCR);
196 v = fb_readw(HD64461_LCDCCR);
197 } while(v&HD64461_LCDCCR_STBACK);
199 v = fb_readw(HD64461_LDR1);
200 v |= HD64461_LDR1_DON;
201 fb_writew(v, HD64461_LDR1);
206 static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
207 unsigned blue, unsigned transp, struct fb_info *info)
212 switch (info->var.bits_per_pixel) {
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);
222 ((u32 *) (info->pseudo_palette))[regno] =
224 ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
230 static int hitfb_sync(struct fb_info *info)
237 static int hitfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
241 var->xres = info->var.xres;
242 var->xres_virtual = info->var.xres;
243 var->yres = info->var.yres;
245 if ((var->bits_per_pixel != 8) && (var->bits_per_pixel != 16))
246 var->bits_per_pixel = info->var.bits_per_pixel;
248 if (var->yres_virtual < var->yres)
249 var->yres_virtual = var->yres;
251 maxy = info->fix.smem_len / var->xres;
253 if (var->bits_per_pixel == 16)
256 if (var->yres_virtual > maxy)
257 var->yres_virtual = maxy;
262 switch (var->bits_per_pixel) {
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;
273 case 16: /* RGB 565 */
274 var->red.offset = 11;
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;
288 static int hitfb_set_par(struct fb_info *info)
292 switch (info->var.bits_per_pixel) {
294 info->fix.line_length = info->var.xres;
295 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
296 info->fix.ypanstep = 16;
299 info->fix.line_length = info->var.xres*2;
300 info->fix.visual = FB_VISUAL_TRUECOLOR;
301 info->fix.ypanstep = 8;
305 fb_writew(info->fix.line_length, HD64461_LCDCLOR);
306 ldr3 = fb_readw(HD64461_LDR3);
308 ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8;
309 fb_writew(ldr3, HD64461_LDR3);
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,
326 static int hitfb_probe(struct platform_device *dev)
328 unsigned short lcdclor, ldr3, ldvndr;
329 struct fb_info *info;
332 if (fb_get_options("hitfb", NULL))
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;
340 lcdclor = fb_readw(HD64461_LCDCLOR);
341 ldvndr = fb_readw(HD64461_LDVNDR);
342 ldr3 = fb_readw(HD64461_LDR3);
347 hitfb_var.bits_per_pixel = 8;
348 hitfb_var.xres = lcdclor;
351 hitfb_var.bits_per_pixel = 16;
352 hitfb_var.xres = lcdclor / 2;
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) {
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;
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;
384 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
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;
395 info->screen_base = (void *)hitfb_fix.smem_start;
397 ret = fb_alloc_cmap(&info->cmap, 256, 0);
398 if (unlikely(ret < 0))
401 ret = register_framebuffer(info);
402 if (unlikely(ret < 0))
405 platform_set_drvdata(dev, info);
407 fb_info(info, "%s frame buffer device\n", info->fix.id);
412 fb_dealloc_cmap(&info->cmap);
414 framebuffer_release(info);
418 static int hitfb_remove(struct platform_device *dev)
420 struct fb_info *info = platform_get_drvdata(dev);
422 unregister_framebuffer(info);
423 fb_dealloc_cmap(&info->cmap);
424 framebuffer_release(info);
429 static int hitfb_suspend(struct device *dev)
434 v = fb_readw(HD64461_STBCR);
435 v |= HD64461_STBCR_SLCKE_IST;
436 fb_writew(v, HD64461_STBCR);
441 static int hitfb_resume(struct device *dev)
445 v = fb_readw(HD64461_STBCR);
446 v &= ~HD64461_STBCR_SLCKE_OST;
448 v = fb_readw(HD64461_STBCR);
449 v &= ~HD64461_STBCR_SLCKE_IST;
450 fb_writew(v, HD64461_STBCR);
456 static const struct dev_pm_ops hitfb_dev_pm_ops = {
457 .suspend = hitfb_suspend,
458 .resume = hitfb_resume,
461 static struct platform_driver hitfb_driver = {
462 .probe = hitfb_probe,
463 .remove = hitfb_remove,
466 .pm = &hitfb_dev_pm_ops,
470 static struct platform_device hitfb_device = {
475 static int __init hitfb_init(void)
479 ret = platform_driver_register(&hitfb_driver);
481 ret = platform_device_register(&hitfb_device);
483 platform_driver_unregister(&hitfb_driver);
489 static void __exit hitfb_exit(void)
491 platform_device_unregister(&hitfb_device);
492 platform_driver_unregister(&hitfb_driver);
495 module_init(hitfb_init);
496 module_exit(hitfb_exit);
498 MODULE_LICENSE("GPL");