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1 | #include <stdio.h> |
2 | #include <stdlib.h> |
3 | #include <string.h> |
4 | #include <math.h> |
5 | #include <sys/types.h> |
6 | #include <sys/stat.h> |
7 | #include <fcntl.h> |
8 | #include <sys/mman.h> |
9 | #include <unistd.h> |
10 | #include <sys/ioctl.h> |
11 | #include <linux/fb.h> |
12 | |
13 | #include "soc.h" |
14 | #include "plat_gp2x.h" |
15 | #include "../common/emu.h" |
16 | #include "../common/arm_utils.h" |
17 | #include "pollux_set.h" |
18 | |
19 | static volatile unsigned short *memregs; |
20 | static volatile unsigned long *memregl; |
21 | static int memdev = -1; |
22 | |
23 | extern void *gp2x_screens[4]; |
24 | |
25 | #define fb_buf_count 4 |
26 | static unsigned int fb_paddr[fb_buf_count]; |
27 | static int fb_work_buf; |
28 | static int fbdev = -1; |
29 | |
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30 | static char cpuclk_was_changed = 0; |
31 | static unsigned short memtimex_old[2]; |
32 | static unsigned int pllsetreg0; |
33 | |
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34 | |
35 | /* video stuff */ |
36 | static void pollux_video_flip(int buf_count) |
37 | { |
38 | memregl[0x406C>>2] = fb_paddr[fb_work_buf]; |
39 | memregl[0x4058>>2] |= 0x10; |
40 | fb_work_buf++; |
41 | if (fb_work_buf >= buf_count) |
42 | fb_work_buf = 0; |
43 | g_screen_ptr = gp2x_screens[fb_work_buf]; |
44 | } |
45 | |
46 | static void gp2x_video_flip_(void) |
47 | { |
48 | pollux_video_flip(fb_buf_count); |
49 | } |
50 | |
51 | /* doulblebuffered flip */ |
52 | static void gp2x_video_flip2_(void) |
53 | { |
54 | pollux_video_flip(2); |
55 | } |
56 | |
57 | static void gp2x_video_changemode_ll_(int bpp) |
58 | { |
59 | int code = 0, bytes = 2; |
60 | unsigned int r; |
61 | switch (bpp) |
62 | { |
63 | case 8: |
64 | code = 0x443a; |
65 | bytes = 1; |
66 | break; |
67 | |
68 | case 15: |
69 | case 16: |
70 | code = 0x4432; |
71 | bytes = 2; |
72 | break; |
73 | |
74 | default: |
75 | printf("unhandled bpp request: %d\n", bpp); |
76 | return; |
77 | } |
78 | |
79 | memregl[0x405c>>2] = bytes; |
80 | memregl[0x4060>>2] = bytes * 320; |
81 | |
82 | r = memregl[0x4058>>2]; |
83 | r = (r & 0xffff) | (code << 16) | 0x10; |
84 | memregl[0x4058>>2] = r; |
85 | } |
86 | |
87 | static void gp2x_video_setpalette_(int *pal, int len) |
88 | { |
89 | /* pollux palette is 16bpp only.. */ |
90 | int i; |
91 | for (i = 0; i < len; i++) |
92 | { |
93 | int c = pal[i]; |
94 | c = ((c >> 8) & 0xf800) | ((c >> 5) & 0x07c0) | ((c >> 3) & 0x001f); |
95 | memregl[0x4070>>2] = (i << 24) | c; |
96 | } |
97 | } |
98 | |
99 | static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H) |
100 | { |
101 | /* maybe a job for 3d hardware? */ |
102 | } |
103 | |
104 | static void gp2x_video_wait_vsync_(void) |
105 | { |
106 | while (!(memregl[0x308c>>2] & (1 << 10))); |
107 | spend_cycles(128); |
108 | memregl[0x308c>>2] |= 1 << 10; |
109 | } |
110 | |
111 | /* CPU clock */ |
112 | static void gp2x_set_cpuclk_(unsigned int mhz) |
113 | { |
114 | char buff[24]; |
115 | snprintf(buff, sizeof(buff), "cpuclk=%u", mhz); |
116 | pollux_set(memregs, buff); |
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117 | |
118 | cpuclk_was_changed = 1; |
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119 | } |
120 | |
121 | /* misc */ |
122 | static void pollux_set_fromenv(const char *env_var) |
123 | { |
124 | const char *set_string; |
125 | set_string = getenv(env_var); |
126 | if (set_string) |
127 | pollux_set(memregs, set_string); |
128 | else |
129 | printf("env var %s not defined.\n", env_var); |
130 | } |
131 | |
132 | /* RAM timings */ |
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133 | static void set_ram_timings_(void) |
134 | { |
135 | pollux_set_fromenv("POLLUX_RAM_TIMINGS"); |
136 | } |
137 | |
138 | static void unset_ram_timings_(void) |
139 | { |
140 | int i; |
141 | |
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142 | memregs[0x14802>>1] = memtimex_old[0]; |
143 | memregs[0x14804>>1] = memtimex_old[1] | 0x8000; |
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144 | |
145 | for (i = 0; i < 0x100000; i++) |
146 | if (!(memregs[0x14804>>1] & 0x8000)) |
147 | break; |
148 | |
149 | printf("RAM timings reset to startup values.\n"); |
150 | } |
151 | |
152 | /* LCD refresh */ |
153 | static void set_lcd_custom_rate_(int is_pal) |
154 | { |
155 | char buff[32]; |
156 | |
157 | snprintf(buff, sizeof(buff), "POLLUX_LCD_TIMINGS_%s", is_pal ? "PAL" : "NTSC"); |
158 | pollux_set_fromenv(buff); |
159 | } |
160 | |
161 | static void unset_lcd_custom_rate_(void) |
162 | { |
163 | } |
164 | |
165 | static void set_lcd_gamma_(int g100, int A_SNs_curve) |
166 | { |
167 | /* hm, the LCD possibly can do it (but not POLLUX) */ |
168 | } |
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169 | |
170 | void pollux_init(void) |
171 | { |
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172 | struct fb_fix_screeninfo fbfix; |
173 | int i, ret; |
174 | |
175 | memdev = open("/dev/mem", O_RDWR); |
176 | if (memdev == -1) { |
177 | perror("open(/dev/mem) failed"); |
178 | exit(1); |
179 | } |
180 | |
181 | memregs = mmap(0, 0x20000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000); |
182 | if (memregs == MAP_FAILED) { |
183 | perror("mmap(memregs) failed"); |
184 | exit(1); |
185 | } |
186 | memregl = (volatile void *)memregs; |
187 | |
188 | fbdev = open("/dev/fb0", O_RDWR); |
189 | if (fbdev < 0) { |
190 | perror("can't open fbdev"); |
191 | exit(1); |
192 | } |
193 | |
194 | ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix); |
195 | if (ret == -1) { |
196 | perror("ioctl(fbdev) failed"); |
197 | exit(1); |
198 | } |
199 | |
200 | printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start); |
201 | fb_paddr[0] = fbfix.smem_start; |
202 | |
203 | gp2x_screens[0] = mmap(0, 320*240*2*fb_buf_count, PROT_READ|PROT_WRITE, |
204 | MAP_SHARED, memdev, fb_paddr[0]); |
205 | if (gp2x_screens[0] == MAP_FAILED) |
206 | { |
207 | perror("mmap(gp2x_screens) failed"); |
208 | exit(1); |
209 | } |
210 | memset(gp2x_screens[0], 0, 320*240*2*fb_buf_count); |
211 | |
212 | printf(" %p -> %08x\n", gp2x_screens[0], fb_paddr[0]); |
213 | for (i = 1; i < fb_buf_count; i++) |
214 | { |
215 | fb_paddr[i] = fb_paddr[i-1] + 320*240*2; |
216 | gp2x_screens[i] = (char *)gp2x_screens[i-1] + 320*240*2; |
217 | printf(" %p -> %08x\n", gp2x_screens[i], fb_paddr[i]); |
218 | } |
219 | fb_work_buf = 0; |
220 | g_screen_ptr = gp2x_screens[0]; |
221 | |
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222 | pllsetreg0 = memregl[0xf004]; |
223 | memtimex_old[0] = memregs[0x14802>>1]; |
224 | memtimex_old[1] = memregs[0x14804>>1]; |
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225 | |
226 | gp2x_video_flip = gp2x_video_flip_; |
227 | gp2x_video_flip2 = gp2x_video_flip2_; |
228 | gp2x_video_changemode_ll = gp2x_video_changemode_ll_; |
229 | gp2x_video_setpalette = gp2x_video_setpalette_; |
230 | gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_; |
231 | gp2x_video_wait_vsync = gp2x_video_wait_vsync_; |
232 | |
233 | gp2x_set_cpuclk = gp2x_set_cpuclk_; |
234 | |
235 | set_lcd_custom_rate = set_lcd_custom_rate_; |
236 | unset_lcd_custom_rate = unset_lcd_custom_rate_; |
237 | set_lcd_gamma = set_lcd_gamma_; |
238 | |
239 | set_ram_timings = set_ram_timings_; |
240 | unset_ram_timings = unset_ram_timings_; |
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241 | } |
242 | |
243 | void pollux_finish(void) |
244 | { |
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245 | /* switch to default fb mem, turn portrait off */ |
246 | memregl[0x406C>>2] = fb_paddr[0]; |
247 | memregl[0x4058>>2] |= 0x10; |
248 | // wiz_lcd_set_portrait(0); |
249 | close(fbdev); |
250 | |
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251 | gp2x_video_changemode_ll_(16); |
252 | unset_ram_timings_(); |
253 | if (cpuclk_was_changed) { |
254 | memregl[0xf004>>2] = pllsetreg0; |
255 | memregl[0xf07c>>2] |= 0x8000; |
256 | } |
257 | |
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258 | munmap((void *)memregs, 0x20000); |
259 | close(memdev); |
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260 | } |
261 | |