1 | /* |
2 | * linux/drivers/video/hitfb.c -- Hitachi LCD frame buffer device |
3 | * |
4 | * (C) 1999 Mihai Spatar |
5 | * (C) 2000 YAEGASHI Takeshi |
6 | * (C) 2003, 2004 Paul Mundt |
7 | * (C) 2003, 2004, 2006 Andriy Skulysh |
8 | * |
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 |
11 | * more details. |
12 | */ |
13 | |
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 | |
32 | static struct fb_var_screeninfo hitfb_var = { |
33 | .activate = FB_ACTIVATE_NOW, |
34 | .height = -1, |
35 | .width = -1, |
36 | .vmode = FB_VMODE_NONINTERLACED, |
37 | }; |
38 | |
39 | static struct fb_fix_screeninfo hitfb_fix = { |
40 | .id = "Hitachi HD64461" , |
41 | .type = FB_TYPE_PACKED_PIXELS, |
42 | .accel = FB_ACCEL_NONE, |
43 | }; |
44 | |
45 | static volatile void __iomem *hitfb_offset_to_addr(unsigned int offset) |
46 | { |
47 | return (__force volatile void __iomem *)(uintptr_t)offset; |
48 | } |
49 | |
50 | static u16 hitfb_readw(unsigned int offset) |
51 | { |
52 | return fb_readw(addr: hitfb_offset_to_addr(offset)); |
53 | } |
54 | |
55 | static void hitfb_writew(u16 value, unsigned int offset) |
56 | { |
57 | fb_writew(b: value, addr: hitfb_offset_to_addr(offset)); |
58 | } |
59 | |
60 | static inline void hitfb_accel_wait(void) |
61 | { |
62 | while (hitfb_readw(offset: HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) |
63 | ; |
64 | } |
65 | |
66 | static inline void hitfb_accel_start(int truecolor) |
67 | { |
68 | if (truecolor) { |
69 | hitfb_writew(value: 6, offset: HD64461_GRCFGR); |
70 | } else { |
71 | hitfb_writew(value: 7, offset: HD64461_GRCFGR); |
72 | } |
73 | } |
74 | |
75 | static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy, |
76 | u16 width, u16 height) |
77 | { |
78 | u32 saddr = WIDTH * dy + dx; |
79 | if (truecolor) |
80 | saddr <<= 1; |
81 | |
82 | hitfb_writew(value: width-1, offset: HD64461_BBTDWR); |
83 | hitfb_writew(value: height-1, offset: HD64461_BBTDHR); |
84 | |
85 | hitfb_writew(value: saddr & 0xffff, offset: HD64461_BBTDSARL); |
86 | hitfb_writew(value: saddr >> 16, offset: HD64461_BBTDSARH); |
87 | |
88 | } |
89 | |
90 | static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx, |
91 | u16 dy, u16 width, u16 height, u16 rop, |
92 | u32 mask_addr) |
93 | { |
94 | u32 saddr, daddr; |
95 | u32 maddr = 0; |
96 | |
97 | height--; |
98 | width--; |
99 | hitfb_writew(value: rop, offset: HD64461_BBTROPR); |
100 | if ((sy < dy) || ((sy == dy) && (sx <= dx))) { |
101 | saddr = WIDTH * (sy + height) + sx + width; |
102 | daddr = WIDTH * (dy + height) + dx + width; |
103 | if (mask_addr) { |
104 | if (truecolor) |
105 | maddr = ((width >> 3) + 1) * (height + 1) - 1; |
106 | else |
107 | maddr = |
108 | (((width >> 4) + 1) * (height + 1) - 1) * 2; |
109 | |
110 | hitfb_writew(value: (1 << 5) | 1, offset: HD64461_BBTMDR); |
111 | } else |
112 | hitfb_writew(value: 1, offset: HD64461_BBTMDR); |
113 | } else { |
114 | saddr = WIDTH * sy + sx; |
115 | daddr = WIDTH * dy + dx; |
116 | if (mask_addr) { |
117 | hitfb_writew(value: (1 << 5), offset: HD64461_BBTMDR); |
118 | } else { |
119 | hitfb_writew(value: 0, offset: HD64461_BBTMDR); |
120 | } |
121 | } |
122 | if (truecolor) { |
123 | saddr <<= 1; |
124 | daddr <<= 1; |
125 | } |
126 | hitfb_writew(value: width, offset: HD64461_BBTDWR); |
127 | hitfb_writew(value: height, offset: HD64461_BBTDHR); |
128 | hitfb_writew(value: saddr & 0xffff, offset: HD64461_BBTSSARL); |
129 | hitfb_writew(value: saddr >> 16, offset: HD64461_BBTSSARH); |
130 | hitfb_writew(value: daddr & 0xffff, offset: HD64461_BBTDSARL); |
131 | hitfb_writew(value: daddr >> 16, offset: HD64461_BBTDSARH); |
132 | if (mask_addr) { |
133 | maddr += mask_addr; |
134 | hitfb_writew(value: maddr & 0xffff, offset: HD64461_BBTMARL); |
135 | hitfb_writew(value: maddr >> 16, offset: HD64461_BBTMARH); |
136 | } |
137 | hitfb_accel_start(truecolor); |
138 | } |
139 | |
140 | static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect) |
141 | { |
142 | if (rect->rop != ROP_COPY) |
143 | cfb_fillrect(info: p, rect); |
144 | else { |
145 | hitfb_accel_wait(); |
146 | hitfb_writew(value: 0x00f0, offset: HD64461_BBTROPR); |
147 | hitfb_writew(value: 16, offset: HD64461_BBTMDR); |
148 | |
149 | if (p->var.bits_per_pixel == 16) { |
150 | hitfb_writew(value: ((u32 *) (p->pseudo_palette))[rect->color], |
151 | offset: HD64461_GRSCR); |
152 | hitfb_accel_set_dest(truecolor: 1, dx: rect->dx, dy: rect->dy, width: rect->width, |
153 | height: rect->height); |
154 | hitfb_accel_start(truecolor: 1); |
155 | } else { |
156 | hitfb_writew(value: rect->color, offset: HD64461_GRSCR); |
157 | hitfb_accel_set_dest(truecolor: 0, dx: rect->dx, dy: rect->dy, width: rect->width, |
158 | height: rect->height); |
159 | hitfb_accel_start(truecolor: 0); |
160 | } |
161 | } |
162 | } |
163 | |
164 | static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area) |
165 | { |
166 | hitfb_accel_wait(); |
167 | hitfb_accel_bitblt(truecolor: p->var.bits_per_pixel == 16, sx: area->sx, sy: area->sy, |
168 | dx: area->dx, dy: area->dy, width: area->width, height: area->height, |
169 | rop: 0x00cc, mask_addr: 0); |
170 | } |
171 | |
172 | static int hitfb_pan_display(struct fb_var_screeninfo *var, |
173 | struct fb_info *info) |
174 | { |
175 | int xoffset = var->xoffset; |
176 | int yoffset = var->yoffset; |
177 | |
178 | if (xoffset != 0) |
179 | return -EINVAL; |
180 | |
181 | hitfb_writew(value: (yoffset*info->fix.line_length)>>10, offset: HD64461_LCDCBAR); |
182 | |
183 | return 0; |
184 | } |
185 | |
186 | static int hitfb_blank(int blank_mode, struct fb_info *info) |
187 | { |
188 | unsigned short v; |
189 | |
190 | if (blank_mode) { |
191 | v = hitfb_readw(offset: HD64461_LDR1); |
192 | v &= ~HD64461_LDR1_DON; |
193 | hitfb_writew(value: v, offset: HD64461_LDR1); |
194 | |
195 | v = hitfb_readw(offset: HD64461_LCDCCR); |
196 | v |= HD64461_LCDCCR_MOFF; |
197 | hitfb_writew(value: v, offset: HD64461_LCDCCR); |
198 | |
199 | v = hitfb_readw(offset: HD64461_STBCR); |
200 | v |= HD64461_STBCR_SLCDST; |
201 | hitfb_writew(value: v, offset: HD64461_STBCR); |
202 | } else { |
203 | v = hitfb_readw(offset: HD64461_STBCR); |
204 | v &= ~HD64461_STBCR_SLCDST; |
205 | hitfb_writew(value: v, offset: HD64461_STBCR); |
206 | |
207 | v = hitfb_readw(offset: HD64461_LCDCCR); |
208 | v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ); |
209 | hitfb_writew(value: v, offset: HD64461_LCDCCR); |
210 | |
211 | do { |
212 | v = hitfb_readw(offset: HD64461_LCDCCR); |
213 | } while(v&HD64461_LCDCCR_STBACK); |
214 | |
215 | v = hitfb_readw(HD64461_LDR1); |
216 | v |= HD64461_LDR1_DON; |
217 | hitfb_writew(v, HD64461_LDR1); |
218 | } |
219 | return 0; |
220 | } |
221 | |
222 | static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green, |
223 | unsigned blue, unsigned transp, struct fb_info *info) |
224 | { |
225 | if (regno >= 256) |
226 | return 1; |
227 | |
228 | switch (info->var.bits_per_pixel) { |
229 | case 8: |
230 | hitfb_writew(regno << 8, HD64461_CPTWAR); |
231 | hitfb_writew(red >> 10, HD64461_CPTWDR); |
232 | hitfb_writew(green >> 10, HD64461_CPTWDR); |
233 | hitfb_writew(blue >> 10, HD64461_CPTWDR); |
234 | break; |
235 | case 16: |
236 | if (regno >= 16) |
237 | return 1; |
238 | ((u32 *) (info->pseudo_palette))[regno] = |
239 | ((red & 0xf800)) | |
240 | ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11); |
241 | break; |
242 | } |
243 | return 0; |
244 | } |
245 | |
246 | static int hitfb_sync(struct fb_info *info) |
247 | { |
248 | hitfb_accel_wait(); |
249 | |
250 | return 0; |
251 | } |
252 | |
253 | static int hitfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) |
254 | { |
255 | int maxy; |
256 | |
257 | var->xres = info->var.xres; |
258 | var->xres_virtual = info->var.xres; |
259 | var->yres = info->var.yres; |
260 | |
261 | if ((var->bits_per_pixel != 8) && (var->bits_per_pixel != 16)) |
262 | var->bits_per_pixel = info->var.bits_per_pixel; |
263 | |
264 | if (var->yres_virtual < var->yres) |
265 | var->yres_virtual = var->yres; |
266 | |
267 | maxy = info->fix.smem_len / var->xres; |
268 | |
269 | if (var->bits_per_pixel == 16) |
270 | maxy /= 2; |
271 | |
272 | if (var->yres_virtual > maxy) |
273 | var->yres_virtual = maxy; |
274 | |
275 | var->xoffset = 0; |
276 | var->yoffset = 0; |
277 | |
278 | switch (var->bits_per_pixel) { |
279 | case 8: |
280 | var->red.offset = 0; |
281 | var->red.length = 8; |
282 | var->green.offset = 0; |
283 | var->green.length = 8; |
284 | var->blue.offset = 0; |
285 | var->blue.length = 8; |
286 | var->transp.offset = 0; |
287 | var->transp.length = 0; |
288 | break; |
289 | case 16: /* RGB 565 */ |
290 | var->red.offset = 11; |
291 | var->red.length = 5; |
292 | var->green.offset = 5; |
293 | var->green.length = 6; |
294 | var->blue.offset = 0; |
295 | var->blue.length = 5; |
296 | var->transp.offset = 0; |
297 | var->transp.length = 0; |
298 | break; |
299 | } |
300 | |
301 | return 0; |
302 | } |
303 | |
304 | static int hitfb_set_par(struct fb_info *info) |
305 | { |
306 | unsigned short ldr3; |
307 | |
308 | switch (info->var.bits_per_pixel) { |
309 | case 8: |
310 | info->fix.line_length = info->var.xres; |
311 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; |
312 | info->fix.ypanstep = 16; |
313 | break; |
314 | case 16: |
315 | info->fix.line_length = info->var.xres*2; |
316 | info->fix.visual = FB_VISUAL_TRUECOLOR; |
317 | info->fix.ypanstep = 8; |
318 | break; |
319 | } |
320 | |
321 | hitfb_writew(info->fix.line_length, HD64461_LCDCLOR); |
322 | ldr3 = hitfb_readw(HD64461_LDR3); |
323 | ldr3 &= ~15; |
324 | ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8; |
325 | hitfb_writew(ldr3, HD64461_LDR3); |
326 | return 0; |
327 | } |
328 | |
329 | static const struct fb_ops hitfb_ops = { |
330 | .owner = THIS_MODULE, |
331 | __FB_DEFAULT_IOMEM_OPS_RDWR, |
332 | .fb_check_var = hitfb_check_var, |
333 | .fb_set_par = hitfb_set_par, |
334 | .fb_setcolreg = hitfb_setcolreg, |
335 | .fb_blank = hitfb_blank, |
336 | .fb_sync = hitfb_sync, |
337 | .fb_pan_display = hitfb_pan_display, |
338 | .fb_fillrect = hitfb_fillrect, |
339 | .fb_copyarea = hitfb_copyarea, |
340 | .fb_imageblit = cfb_imageblit, |
341 | __FB_DEFAULT_IOMEM_OPS_MMAP, |
342 | }; |
343 | |
344 | static int hitfb_probe(struct platform_device *dev) |
345 | { |
346 | unsigned short lcdclor, ldr3, ldvndr; |
347 | struct fb_info *info; |
348 | int ret; |
349 | |
350 | if (fb_get_options(name: "hitfb" , NULL)) |
351 | return -ENODEV; |
352 | |
353 | hitfb_fix.mmio_start = HD64461_IO_OFFSET(0x1000); |
354 | hitfb_fix.mmio_len = 0x1000; |
355 | hitfb_fix.smem_start = HD64461_IO_OFFSET(0x02000000); |
356 | hitfb_fix.smem_len = 512 * 1024; |
357 | |
358 | lcdclor = hitfb_readw(HD64461_LCDCLOR); |
359 | ldvndr = hitfb_readw(HD64461_LDVNDR); |
360 | ldr3 = hitfb_readw(HD64461_LDR3); |
361 | |
362 | switch (ldr3 & 15) { |
363 | default: |
364 | case 4: |
365 | hitfb_var.bits_per_pixel = 8; |
366 | hitfb_var.xres = lcdclor; |
367 | break; |
368 | case 8: |
369 | hitfb_var.bits_per_pixel = 16; |
370 | hitfb_var.xres = lcdclor / 2; |
371 | break; |
372 | } |
373 | hitfb_fix.line_length = lcdclor; |
374 | hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ? |
375 | FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; |
376 | hitfb_var.yres = ldvndr + 1; |
377 | hitfb_var.xres_virtual = hitfb_var.xres; |
378 | hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor; |
379 | switch (hitfb_var.bits_per_pixel) { |
380 | case 8: |
381 | hitfb_var.red.offset = 0; |
382 | hitfb_var.red.length = 8; |
383 | hitfb_var.green.offset = 0; |
384 | hitfb_var.green.length = 8; |
385 | hitfb_var.blue.offset = 0; |
386 | hitfb_var.blue.length = 8; |
387 | hitfb_var.transp.offset = 0; |
388 | hitfb_var.transp.length = 0; |
389 | break; |
390 | case 16: /* RGB 565 */ |
391 | hitfb_var.red.offset = 11; |
392 | hitfb_var.red.length = 5; |
393 | hitfb_var.green.offset = 5; |
394 | hitfb_var.green.length = 6; |
395 | hitfb_var.blue.offset = 0; |
396 | hitfb_var.blue.length = 5; |
397 | hitfb_var.transp.offset = 0; |
398 | hitfb_var.transp.length = 0; |
399 | break; |
400 | } |
401 | |
402 | info = framebuffer_alloc(size: sizeof(u32) * 16, dev: &dev->dev); |
403 | if (unlikely(!info)) |
404 | return -ENOMEM; |
405 | |
406 | info->fbops = &hitfb_ops; |
407 | info->var = hitfb_var; |
408 | info->fix = hitfb_fix; |
409 | info->pseudo_palette = info->par; |
410 | info->flags = FBINFO_HWACCEL_YPAN | |
411 | FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA; |
412 | |
413 | info->screen_base = (char __iomem *)(uintptr_t)hitfb_fix.smem_start; |
414 | |
415 | ret = fb_alloc_cmap(cmap: &info->cmap, len: 256, transp: 0); |
416 | if (unlikely(ret < 0)) |
417 | goto err_fb; |
418 | |
419 | ret = register_framebuffer(fb_info: info); |
420 | if (unlikely(ret < 0)) |
421 | goto err; |
422 | |
423 | platform_set_drvdata(pdev: dev, data: info); |
424 | |
425 | fb_info(info, "%s frame buffer device\n" , info->fix.id); |
426 | |
427 | return 0; |
428 | |
429 | err: |
430 | fb_dealloc_cmap(cmap: &info->cmap); |
431 | err_fb: |
432 | framebuffer_release(info); |
433 | return ret; |
434 | } |
435 | |
436 | static void hitfb_remove(struct platform_device *dev) |
437 | { |
438 | struct fb_info *info = platform_get_drvdata(pdev: dev); |
439 | |
440 | unregister_framebuffer(fb_info: info); |
441 | fb_dealloc_cmap(cmap: &info->cmap); |
442 | framebuffer_release(info); |
443 | } |
444 | |
445 | static int hitfb_suspend(struct device *dev) |
446 | { |
447 | u16 v; |
448 | |
449 | hitfb_blank(blank_mode: 1, NULL); |
450 | v = hitfb_readw(HD64461_STBCR); |
451 | v |= HD64461_STBCR_SLCKE_IST; |
452 | hitfb_writew(v, HD64461_STBCR); |
453 | |
454 | return 0; |
455 | } |
456 | |
457 | static int hitfb_resume(struct device *dev) |
458 | { |
459 | u16 v; |
460 | |
461 | v = hitfb_readw(HD64461_STBCR); |
462 | v &= ~HD64461_STBCR_SLCKE_OST; |
463 | msleep(msecs: 100); |
464 | v = hitfb_readw(HD64461_STBCR); |
465 | v &= ~HD64461_STBCR_SLCKE_IST; |
466 | hitfb_writew(v, HD64461_STBCR); |
467 | hitfb_blank(blank_mode: 0, NULL); |
468 | |
469 | return 0; |
470 | } |
471 | |
472 | static const struct dev_pm_ops hitfb_dev_pm_ops = { |
473 | .suspend = hitfb_suspend, |
474 | .resume = hitfb_resume, |
475 | }; |
476 | |
477 | static struct platform_driver hitfb_driver = { |
478 | .probe = hitfb_probe, |
479 | .remove_new = hitfb_remove, |
480 | .driver = { |
481 | .name = "hitfb" , |
482 | .pm = &hitfb_dev_pm_ops, |
483 | }, |
484 | }; |
485 | |
486 | static struct platform_device hitfb_device = { |
487 | .name = "hitfb" , |
488 | .id = -1, |
489 | }; |
490 | |
491 | static int __init hitfb_init(void) |
492 | { |
493 | int ret; |
494 | |
495 | ret = platform_driver_register(&hitfb_driver); |
496 | if (!ret) { |
497 | ret = platform_device_register(&hitfb_device); |
498 | if (ret) |
499 | platform_driver_unregister(&hitfb_driver); |
500 | } |
501 | return ret; |
502 | } |
503 | |
504 | |
505 | static void __exit hitfb_exit(void) |
506 | { |
507 | platform_device_unregister(&hitfb_device); |
508 | platform_driver_unregister(&hitfb_driver); |
509 | } |
510 | |
511 | module_init(hitfb_init); |
512 | module_exit(hitfb_exit); |
513 | |
514 | MODULE_LICENSE("GPL" ); |
515 | |