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 <asm/uaccess.h>
26 #include <asm/pgtable.h>
28 #include <asm/hd64461.h>
33 static struct fb_var_screeninfo hitfb_var = {
34 .activate = FB_ACTIVATE_NOW,
37 .vmode = FB_VMODE_NONINTERLACED,
40 static struct fb_fix_screeninfo hitfb_fix = {
41 .id = "Hitachi HD64461",
42 .type = FB_TYPE_PACKED_PIXELS,
43 .accel = FB_ACCEL_NONE,
46 static inline void hitfb_accel_wait(void)
48 while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
51 static inline void hitfb_accel_start(int truecolor)
54 fb_writew(6, HD64461_GRCFGR);
56 fb_writew(7, HD64461_GRCFGR);
60 static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
61 u16 width, u16 height)
63 u32 saddr = WIDTH * dy + dx;
67 fb_writew(width-1, HD64461_BBTDWR);
68 fb_writew(height-1, HD64461_BBTDHR);
70 fb_writew(saddr & 0xffff, HD64461_BBTDSARL);
71 fb_writew(saddr >> 16, HD64461_BBTDSARH);
75 static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
76 u16 dy, u16 width, u16 height, u16 rop,
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;
90 maddr = ((width >> 3) + 1) * (height + 1) - 1;
93 (((width >> 4) + 1) * (height + 1) - 1) * 2;
95 fb_writew((1 << 5) | 1, HD64461_BBTMDR);
97 fb_writew(1, HD64461_BBTMDR);
99 saddr = WIDTH * sy + sx;
100 daddr = WIDTH * dy + dx;
102 fb_writew((1 << 5), HD64461_BBTMDR);
104 fb_writew(0, HD64461_BBTMDR);
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);
119 fb_writew(maddr & 0xffff, HD64461_BBTMARL);
120 fb_writew(maddr >> 16, HD64461_BBTMARH);
122 hitfb_accel_start(truecolor);
125 static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
127 if (rect->rop != ROP_COPY)
128 cfb_fillrect(p, rect);
131 fb_writew(0x00f0, HD64461_BBTROPR);
132 fb_writew(16, HD64461_BBTMDR);
134 if (p->var.bits_per_pixel == 16) {
135 fb_writew(((u32 *) (p->pseudo_palette))[rect->color],
137 hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
139 hitfb_accel_start(1);
141 fb_writew(rect->color, HD64461_GRSCR);
142 hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
144 hitfb_accel_start(0);
149 static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
152 hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
153 area->dx, area->dy, area->width, area->height,
157 static int hitfb_pan_display(struct fb_var_screeninfo *var,
158 struct fb_info *info)
160 int xoffset = var->xoffset;
161 int yoffset = var->yoffset;
166 fb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR);
171 int hitfb_blank(int blank_mode, struct fb_info *info)
176 v = fb_readw(HD64461_LDR1);
177 v &= ~HD64461_LDR1_DON;
178 fb_writew(v, HD64461_LDR1);
180 v = fb_readw(HD64461_LCDCCR);
181 v |= HD64461_LCDCCR_MOFF;
182 fb_writew(v, HD64461_LCDCCR);
184 v = fb_readw(HD64461_STBCR);
185 v |= HD64461_STBCR_SLCDST;
186 fb_writew(v, HD64461_STBCR);
188 v = fb_readw(HD64461_STBCR);
189 v &= ~HD64461_STBCR_SLCDST;
190 fb_writew(v, HD64461_STBCR);
192 v = fb_readw(HD64461_LCDCCR);
193 v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ);
194 fb_writew(v, HD64461_LCDCCR);
197 v = fb_readw(HD64461_LCDCCR);
198 } while(v&HD64461_LCDCCR_STBACK);
200 v = fb_readw(HD64461_LDR1);
201 v |= HD64461_LDR1_DON;
202 fb_writew(v, HD64461_LDR1);
207 static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
208 unsigned blue, unsigned transp, struct fb_info *info)
213 switch (info->var.bits_per_pixel) {
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);
223 ((u32 *) (info->pseudo_palette))[regno] =
225 ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
231 static int hitfb_sync(struct fb_info *info)
238 static int hitfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
242 var->xres = info->var.xres;
243 var->xres_virtual = info->var.xres;
244 var->yres = info->var.yres;
246 if ((var->bits_per_pixel != 8) && (var->bits_per_pixel != 16))
247 var->bits_per_pixel = info->var.bits_per_pixel;
249 if (var->yres_virtual < var->yres)
250 var->yres_virtual = var->yres;
252 maxy = info->fix.smem_len / var->xres;
254 if (var->bits_per_pixel == 16)
257 if (var->yres_virtual > maxy)
258 var->yres_virtual = maxy;
263 switch (var->bits_per_pixel) {
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;
274 case 16: /* RGB 565 */
275 var->red.offset = 11;
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;
289 static int hitfb_set_par(struct fb_info *info)
293 switch (info->var.bits_per_pixel) {
295 info->fix.line_length = info->var.xres;
296 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
297 info->fix.ypanstep = 16;
300 info->fix.line_length = info->var.xres*2;
301 info->fix.visual = FB_VISUAL_TRUECOLOR;
302 info->fix.ypanstep = 8;
306 fb_writew(info->fix.line_length, HD64461_LCDCLOR);
307 ldr3 = fb_readw(HD64461_LDR3);
309 ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8;
310 fb_writew(ldr3, HD64461_LDR3);
314 static 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,
327 static int hitfb_probe(struct platform_device *dev)
329 unsigned short lcdclor, ldr3, ldvndr;
330 struct fb_info *info;
333 if (fb_get_options("hitfb", NULL))
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;
341 lcdclor = fb_readw(HD64461_LCDCLOR);
342 ldvndr = fb_readw(HD64461_LDVNDR);
343 ldr3 = fb_readw(HD64461_LDR3);
348 hitfb_var.bits_per_pixel = 8;
349 hitfb_var.xres = lcdclor;
352 hitfb_var.bits_per_pixel = 16;
353 hitfb_var.xres = lcdclor / 2;
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) {
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;
373 case 16: /* RGB 565 */
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;
385 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
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;
396 info->screen_base = (void *)hitfb_fix.smem_start;
398 ret = fb_alloc_cmap(&info->cmap, 256, 0);
399 if (unlikely(ret < 0))
402 ret = register_framebuffer(info);
403 if (unlikely(ret < 0))
406 platform_set_drvdata(dev, info);
408 printk(KERN_INFO "fb%d: %s frame buffer device\n",
409 info->node, info->fix.id);
414 fb_dealloc_cmap(&info->cmap);
416 framebuffer_release(info);
420 static int hitfb_remove(struct platform_device *dev)
422 struct fb_info *info = platform_get_drvdata(dev);
424 unregister_framebuffer(info);
425 fb_dealloc_cmap(&info->cmap);
426 framebuffer_release(info);
431 static int hitfb_suspend(struct device *dev)
436 v = fb_readw(HD64461_STBCR);
437 v |= HD64461_STBCR_SLCKE_IST;
438 fb_writew(v, HD64461_STBCR);
443 static int hitfb_resume(struct device *dev)
447 v = fb_readw(HD64461_STBCR);
448 v &= ~HD64461_STBCR_SLCKE_OST;
450 v = fb_readw(HD64461_STBCR);
451 v &= ~HD64461_STBCR_SLCKE_IST;
452 fb_writew(v, HD64461_STBCR);
458 static const struct dev_pm_ops hitfb_dev_pm_ops = {
459 .suspend = hitfb_suspend,
460 .resume = hitfb_resume,
463 static struct platform_driver hitfb_driver = {
464 .probe = hitfb_probe,
465 .remove = hitfb_remove,
468 .owner = THIS_MODULE,
469 .pm = &hitfb_dev_pm_ops,
473 static struct platform_device hitfb_device = {
478 static int __init hitfb_init(void)
482 ret = platform_driver_register(&hitfb_driver);
484 ret = platform_device_register(&hitfb_device);
486 platform_driver_unregister(&hitfb_driver);
492 static void __exit hitfb_exit(void)
494 platform_device_unregister(&hitfb_device);
495 platform_driver_unregister(&hitfb_driver);
498 module_init(hitfb_init);
499 module_exit(hitfb_exit);
501 MODULE_LICENSE("GPL");