Merge rsync://bughost.org/repos/ieee80211-delta/
[linux-2.6] / drivers / video / hitfb.c
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 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/config.h>
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/sched.h>
18 #include <linux/errno.h>
19 #include <linux/string.h>
20 #include <linux/mm.h>
21 #include <linux/tty.h>
22 #include <linux/slab.h>
23 #include <linux/delay.h>
24 #include <linux/init.h>
25 #include <linux/fb.h>
26
27 #include <asm/machvec.h>
28 #include <asm/uaccess.h>
29 #include <asm/pgtable.h>
30 #include <asm/io.h>
31 #include <asm/hd64461/hd64461.h>
32
33 #ifdef MACH_HP600
34 #include <asm/cpu/dac.h>
35 #include <asm/hp6xx/hp6xx.h>
36 #endif
37
38 #define WIDTH 640
39
40 static struct fb_var_screeninfo hitfb_var __initdata = {
41         .activate       = FB_ACTIVATE_NOW,
42         .height         = -1,
43         .width          = -1,
44         .vmode          = FB_VMODE_NONINTERLACED,
45 };
46
47 static struct fb_fix_screeninfo hitfb_fix __initdata = {
48         .id             = "Hitachi HD64461",
49         .type           = FB_TYPE_PACKED_PIXELS,
50         .ypanstep       = 8,
51         .accel          = FB_ACCEL_NONE,
52 };
53
54 static u32 pseudo_palette[16];
55 static struct fb_info fb_info;
56
57 static inline void hitfb_accel_wait(void)
58 {
59         while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
60 }
61
62 static inline void hitfb_accel_start(int truecolor)
63 {
64         if (truecolor) {
65                 fb_writew(6, HD64461_GRCFGR);
66         } else {
67                 fb_writew(7, HD64461_GRCFGR);
68         }
69 }
70
71 static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
72                                         u16 width, u16 height)
73 {
74         u32 saddr = WIDTH * dy + dx;
75         if (truecolor)
76                 saddr <<= 1;
77
78         fb_writew(width, HD64461_BBTDWR);
79         fb_writew(height, HD64461_BBTDHR);
80
81         fb_writew(saddr & 0xffff, HD64461_BBTDSARL);
82         fb_writew(saddr >> 16, HD64461_BBTDSARH);
83
84 }
85
86 static inline void hitfb_accel_solidfill(int truecolor, u16 dx, u16 dy,
87                                          u16 width, u16 height, u16 color)
88 {
89         hitfb_accel_set_dest(truecolor, dx, dy, width, height);
90
91         fb_writew(0x00f0, HD64461_BBTROPR);
92         fb_writew(16, HD64461_BBTMDR);
93         fb_writew(color, HD64461_GRSCR);
94
95         hitfb_accel_start(truecolor);
96 }
97
98 static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
99                                       u16 dy, u16 width, u16 height, u16 rop,
100                                       u32 mask_addr)
101 {
102         u32 saddr, daddr;
103         u32 maddr = 0;
104
105         fb_writew(rop, HD64461_BBTROPR);
106         if ((sy < dy) || ((sy == dy) && (sx <= dx))) {
107                 saddr = WIDTH * (sy + height) + sx + width;
108                 daddr = WIDTH * (dy + height) + dx + width;
109                 if (mask_addr) {
110                         if (truecolor)
111                                 maddr = ((width >> 3) + 1) * (height + 1) - 1;
112                         else
113                                 maddr =
114                                     (((width >> 4) + 1) * (height + 1) - 1) * 2;
115
116                         fb_writew((1 << 5) | 1, HD64461_BBTMDR);
117                 } else
118                         fb_writew(1, HD64461_BBTMDR);
119         } else {
120                 saddr = WIDTH * sy + sx;
121                 daddr = WIDTH * dy + dx;
122                 if (mask_addr) {
123                         fb_writew((1 << 5), HD64461_BBTMDR);
124                 } else {
125                         fb_writew(0, HD64461_BBTMDR);
126                 }
127         }
128         if (truecolor) {
129                 saddr <<= 1;
130                 daddr <<= 1;
131         }
132         fb_writew(width, HD64461_BBTDWR);
133         fb_writew(height, HD64461_BBTDHR);
134         fb_writew(saddr & 0xffff, HD64461_BBTSSARL);
135         fb_writew(saddr >> 16, HD64461_BBTSSARH);
136         fb_writew(daddr & 0xffff, HD64461_BBTDSARL);
137         fb_writew(daddr >> 16, HD64461_BBTDSARH);
138         if (mask_addr) {
139                 maddr += mask_addr;
140                 fb_writew(maddr & 0xffff, HD64461_BBTMARL);
141                 fb_writew(maddr >> 16, HD64461_BBTMARH);
142         }
143         hitfb_accel_start(truecolor);
144 }
145
146 static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
147 {
148         if (rect->rop != ROP_COPY)
149                 cfb_fillrect(p, rect);
150         else {
151                 fb_writew(0x00f0, HD64461_BBTROPR);
152                 fb_writew(16, HD64461_BBTMDR);
153
154                 if (p->var.bits_per_pixel == 16) {
155                         fb_writew(((u32 *) (p->pseudo_palette))[rect->color],
156                                   HD64461_GRSCR);
157                         hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
158                                              rect->height);
159                         hitfb_accel_start(1);
160                 } else {
161                         fb_writew(rect->color, HD64461_GRSCR);
162                         hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
163                                              rect->height);
164                         hitfb_accel_start(0);
165                 }
166                 hitfb_accel_wait();
167         }
168 }
169
170 static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
171 {
172         hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
173                            area->dx, area->dy, area->width, area->height,
174                            0x00cc, 0);
175         hitfb_accel_wait();
176 }
177
178 static int hitfb_pan_display(struct fb_var_screeninfo *var,
179                              struct fb_info *info)
180 {
181         int xoffset = var->xoffset;
182         int yoffset = var->yoffset;
183
184         if (xoffset != 0)
185                 return -EINVAL;
186
187         fb_writew(yoffset, HD64461_LCDCBAR);
188
189         return 0;
190 }
191
192 int hitfb_blank(int blank_mode, struct fb_info *info)
193 {
194         unsigned short v;
195
196         if (blank_mode) {
197 #ifdef MACH_HP600
198                 sh_dac_disable(DAC_LCD_BRIGHTNESS);
199                 v = fb_readw(HD64461_GPBDR);
200                 v |= HD64461_GPBDR_LCDOFF;
201                 fb_writew(v, HD64461_GPBDR);
202 #endif
203                 v = fb_readw(HD64461_LDR1);
204                 v &= ~HD64461_LDR1_DON;
205                 fb_writew(v, HD64461_LDR1);
206
207                 v = fb_readw(HD64461_LCDCCR);
208                 v |= HD64461_LCDCCR_MOFF;
209                 fb_writew(v, HD64461_LCDCCR);
210
211                 v = fb_readw(HD64461_STBCR);
212                 v |= HD64461_STBCR_SLCDST;
213                 fb_writew(v, HD64461_STBCR);
214         } else {
215                 v = fb_readw(HD64461_STBCR);
216                 v &= ~HD64461_STBCR_SLCDST;
217                 fb_writew(v, HD64461_STBCR);
218 #ifdef MACH_HP600
219                 sh_dac_enable(DAC_LCD_BRIGHTNESS);
220                 v = fb_readw(HD64461_GPBDR);
221                 v &= ~HD64461_GPBDR_LCDOFF;
222                 fb_writew(v, HD64461_GPBDR);
223 #endif
224                 v = fb_readw(HD64461_LDR1);
225                 v |= HD64461_LDR1_DON;
226                 fb_writew(v, HD64461_LDR1);
227
228                 v = fb_readw(HD64461_LCDCCR);
229                 v &= ~HD64461_LCDCCR_MOFF;
230                 fb_writew(v, HD64461_LCDCCR);
231         }
232         return 0;
233 }
234
235 static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
236                            unsigned blue, unsigned transp, struct fb_info *info)
237 {
238         if (regno >= info->cmap.len)
239                 return 1;
240
241         switch (info->var.bits_per_pixel) {
242         case 8:
243                 fb_writew(regno << 8, HD64461_CPTWAR);
244                 fb_writew(red >> 10, HD64461_CPTWDR);
245                 fb_writew(green >> 10, HD64461_CPTWDR);
246                 fb_writew(blue >> 10, HD64461_CPTWDR);
247                 break;
248         case 16:
249                 ((u32 *) (info->pseudo_palette))[regno] =
250                     ((red & 0xf800)) |
251                     ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
252                 break;
253         }
254         return 0;
255 }
256
257 static struct fb_ops hitfb_ops = {
258         .owner          = THIS_MODULE,
259         .fb_setcolreg   = hitfb_setcolreg,
260         .fb_blank       = hitfb_blank,
261         .fb_pan_display = hitfb_pan_display,
262         .fb_fillrect    = hitfb_fillrect,
263         .fb_copyarea    = hitfb_copyarea,
264         .fb_imageblit   = cfb_imageblit,
265 };
266
267 int __init hitfb_init(void)
268 {
269         unsigned short lcdclor, ldr3, ldvndr;
270         int size;
271
272         if (fb_get_options("hitfb", NULL))
273                 return -ENODEV;
274
275         hitfb_fix.smem_start = CONFIG_HD64461_IOBASE + 0x02000000;
276         hitfb_fix.smem_len = (MACH_HP690) ? 1024 * 1024 : 512 * 1024;
277
278         lcdclor = fb_readw(HD64461_LCDCLOR);
279         ldvndr = fb_readw(HD64461_LDVNDR);
280         ldr3 = fb_readw(HD64461_LDR3);
281
282         switch (ldr3 & 15) {
283         default:
284         case 4:
285                 hitfb_var.bits_per_pixel = 8;
286                 hitfb_var.xres = lcdclor;
287                 break;
288         case 8:
289                 hitfb_var.bits_per_pixel = 16;
290                 hitfb_var.xres = lcdclor / 2;
291                 break;
292         }
293         hitfb_fix.line_length = lcdclor;
294         hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ?
295             FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
296         hitfb_var.yres = ldvndr + 1;
297         hitfb_var.xres_virtual = hitfb_var.xres;
298         hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor;
299         switch (hitfb_var.bits_per_pixel) {
300         case 8:
301                 hitfb_var.red.offset = 0;
302                 hitfb_var.red.length = 8;
303                 hitfb_var.green.offset = 0;
304                 hitfb_var.green.length = 8;
305                 hitfb_var.blue.offset = 0;
306                 hitfb_var.blue.length = 8;
307                 hitfb_var.transp.offset = 0;
308                 hitfb_var.transp.length = 0;
309                 break;
310         case 16:                /* RGB 565 */
311                 hitfb_var.red.offset = 11;
312                 hitfb_var.red.length = 5;
313                 hitfb_var.green.offset = 5;
314                 hitfb_var.green.length = 6;
315                 hitfb_var.blue.offset = 0;
316                 hitfb_var.blue.length = 5;
317                 hitfb_var.transp.offset = 0;
318                 hitfb_var.transp.length = 0;
319                 break;
320         }
321
322         fb_info.fbops = &hitfb_ops;
323         fb_info.var = hitfb_var;
324         fb_info.fix = hitfb_fix;
325         fb_info.pseudo_palette = pseudo_palette;
326         fb_info.flags = FBINFO_DEFAULT;
327
328         fb_info.screen_base = (void *)hitfb_fix.smem_start;
329
330         size = (fb_info.var.bits_per_pixel == 8) ? 256 : 16;
331         fb_alloc_cmap(&fb_info.cmap, size, 0);
332
333         if (register_framebuffer(&fb_info) < 0)
334                 return -EINVAL;
335
336         printk(KERN_INFO "fb%d: %s frame buffer device\n",
337                fb_info.node, fb_info.fix.id);
338         return 0;
339 }
340
341 static void __exit hitfb_exit(void)
342 {
343         unregister_framebuffer(&fb_info);
344 }
345
346 module_init(hitfb_init);
347 module_exit(hitfb_exit);
348
349 MODULE_LICENSE("GPL");