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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; |
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33 | static int last_pal_setting = 0; |
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34 | |
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35 | |
36 | /* video stuff */ |
37 | static void pollux_video_flip(int buf_count) |
38 | { |
39 | memregl[0x406C>>2] = fb_paddr[fb_work_buf]; |
40 | memregl[0x4058>>2] |= 0x10; |
41 | fb_work_buf++; |
42 | if (fb_work_buf >= buf_count) |
43 | fb_work_buf = 0; |
44 | g_screen_ptr = gp2x_screens[fb_work_buf]; |
45 | } |
46 | |
47 | static void gp2x_video_flip_(void) |
48 | { |
49 | pollux_video_flip(fb_buf_count); |
50 | } |
51 | |
52 | /* doulblebuffered flip */ |
53 | static void gp2x_video_flip2_(void) |
54 | { |
55 | pollux_video_flip(2); |
56 | } |
57 | |
58 | static void gp2x_video_changemode_ll_(int bpp) |
59 | { |
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60 | static int prev_bpp = 0; |
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61 | int code = 0, bytes = 2; |
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62 | int rot_cmd[2] = { 0, 0 }; |
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63 | unsigned int r; |
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64 | int ret; |
65 | |
66 | if (bpp == prev_bpp) |
67 | return; |
68 | prev_bpp = bpp; |
69 | |
70 | printf("changemode: %dbpp rot=%d\n", abs(bpp), bpp < 0); |
71 | |
72 | /* negative bpp means rotated mode */ |
73 | rot_cmd[0] = (bpp < 0) ? 6 : 5; |
74 | ret = ioctl(fbdev, _IOW('D', 90, int[2]), rot_cmd); |
75 | if (ret < 0) |
76 | perror("rot ioctl failed"); |
77 | memregl[0x4004>>2] = (bpp < 0) ? 0x013f00ef : 0x00ef013f; |
78 | memregl[0x4000>>2] |= 1 << 3; |
79 | |
80 | /* the above ioctl resets LCD timings, so set them here */ |
81 | set_lcd_custom_rate(last_pal_setting); |
82 | |
83 | switch (abs(bpp)) |
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84 | { |
85 | case 8: |
86 | code = 0x443a; |
87 | bytes = 1; |
88 | break; |
89 | |
90 | case 15: |
91 | case 16: |
92 | code = 0x4432; |
93 | bytes = 2; |
94 | break; |
95 | |
96 | default: |
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97 | printf("unhandled bpp request: %d\n", abs(bpp)); |
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98 | return; |
99 | } |
100 | |
101 | memregl[0x405c>>2] = bytes; |
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102 | memregl[0x4060>>2] = bytes * (bpp < 0 ? 240 : 320); |
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103 | |
104 | r = memregl[0x4058>>2]; |
105 | r = (r & 0xffff) | (code << 16) | 0x10; |
106 | memregl[0x4058>>2] = r; |
107 | } |
108 | |
109 | static void gp2x_video_setpalette_(int *pal, int len) |
110 | { |
111 | /* pollux palette is 16bpp only.. */ |
112 | int i; |
113 | for (i = 0; i < len; i++) |
114 | { |
115 | int c = pal[i]; |
116 | c = ((c >> 8) & 0xf800) | ((c >> 5) & 0x07c0) | ((c >> 3) & 0x001f); |
117 | memregl[0x4070>>2] = (i << 24) | c; |
118 | } |
119 | } |
120 | |
121 | static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H) |
122 | { |
123 | /* maybe a job for 3d hardware? */ |
124 | } |
125 | |
126 | static void gp2x_video_wait_vsync_(void) |
127 | { |
128 | while (!(memregl[0x308c>>2] & (1 << 10))); |
129 | spend_cycles(128); |
130 | memregl[0x308c>>2] |= 1 << 10; |
131 | } |
132 | |
133 | /* CPU clock */ |
134 | static void gp2x_set_cpuclk_(unsigned int mhz) |
135 | { |
136 | char buff[24]; |
137 | snprintf(buff, sizeof(buff), "cpuclk=%u", mhz); |
138 | pollux_set(memregs, buff); |
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139 | |
140 | cpuclk_was_changed = 1; |
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141 | } |
142 | |
143 | /* misc */ |
144 | static void pollux_set_fromenv(const char *env_var) |
145 | { |
146 | const char *set_string; |
147 | set_string = getenv(env_var); |
148 | if (set_string) |
149 | pollux_set(memregs, set_string); |
150 | else |
151 | printf("env var %s not defined.\n", env_var); |
152 | } |
153 | |
154 | /* RAM timings */ |
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155 | static void set_ram_timings_(void) |
156 | { |
157 | pollux_set_fromenv("POLLUX_RAM_TIMINGS"); |
158 | } |
159 | |
160 | static void unset_ram_timings_(void) |
161 | { |
162 | int i; |
163 | |
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164 | memregs[0x14802>>1] = memtimex_old[0]; |
165 | memregs[0x14804>>1] = memtimex_old[1] | 0x8000; |
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166 | |
167 | for (i = 0; i < 0x100000; i++) |
168 | if (!(memregs[0x14804>>1] & 0x8000)) |
169 | break; |
170 | |
171 | printf("RAM timings reset to startup values.\n"); |
172 | } |
173 | |
174 | /* LCD refresh */ |
175 | static void set_lcd_custom_rate_(int is_pal) |
176 | { |
177 | char buff[32]; |
178 | |
179 | snprintf(buff, sizeof(buff), "POLLUX_LCD_TIMINGS_%s", is_pal ? "PAL" : "NTSC"); |
180 | pollux_set_fromenv(buff); |
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181 | last_pal_setting = is_pal; |
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182 | } |
183 | |
184 | static void unset_lcd_custom_rate_(void) |
185 | { |
186 | } |
187 | |
188 | static void set_lcd_gamma_(int g100, int A_SNs_curve) |
189 | { |
190 | /* hm, the LCD possibly can do it (but not POLLUX) */ |
191 | } |
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192 | |
193 | void pollux_init(void) |
194 | { |
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195 | struct fb_fix_screeninfo fbfix; |
196 | int i, ret; |
197 | |
198 | memdev = open("/dev/mem", O_RDWR); |
199 | if (memdev == -1) { |
200 | perror("open(/dev/mem) failed"); |
201 | exit(1); |
202 | } |
203 | |
204 | memregs = mmap(0, 0x20000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000); |
205 | if (memregs == MAP_FAILED) { |
206 | perror("mmap(memregs) failed"); |
207 | exit(1); |
208 | } |
209 | memregl = (volatile void *)memregs; |
210 | |
211 | fbdev = open("/dev/fb0", O_RDWR); |
212 | if (fbdev < 0) { |
213 | perror("can't open fbdev"); |
214 | exit(1); |
215 | } |
216 | |
217 | ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix); |
218 | if (ret == -1) { |
219 | perror("ioctl(fbdev) failed"); |
220 | exit(1); |
221 | } |
222 | |
223 | printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start); |
224 | fb_paddr[0] = fbfix.smem_start; |
225 | |
226 | gp2x_screens[0] = mmap(0, 320*240*2*fb_buf_count, PROT_READ|PROT_WRITE, |
227 | MAP_SHARED, memdev, fb_paddr[0]); |
228 | if (gp2x_screens[0] == MAP_FAILED) |
229 | { |
230 | perror("mmap(gp2x_screens) failed"); |
231 | exit(1); |
232 | } |
233 | memset(gp2x_screens[0], 0, 320*240*2*fb_buf_count); |
234 | |
235 | printf(" %p -> %08x\n", gp2x_screens[0], fb_paddr[0]); |
236 | for (i = 1; i < fb_buf_count; i++) |
237 | { |
238 | fb_paddr[i] = fb_paddr[i-1] + 320*240*2; |
239 | gp2x_screens[i] = (char *)gp2x_screens[i-1] + 320*240*2; |
240 | printf(" %p -> %08x\n", gp2x_screens[i], fb_paddr[i]); |
241 | } |
242 | fb_work_buf = 0; |
243 | g_screen_ptr = gp2x_screens[0]; |
244 | |
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245 | pllsetreg0 = memregl[0xf004]; |
246 | memtimex_old[0] = memregs[0x14802>>1]; |
247 | memtimex_old[1] = memregs[0x14804>>1]; |
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248 | |
249 | gp2x_video_flip = gp2x_video_flip_; |
250 | gp2x_video_flip2 = gp2x_video_flip2_; |
251 | gp2x_video_changemode_ll = gp2x_video_changemode_ll_; |
252 | gp2x_video_setpalette = gp2x_video_setpalette_; |
253 | gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_; |
254 | gp2x_video_wait_vsync = gp2x_video_wait_vsync_; |
255 | |
256 | gp2x_set_cpuclk = gp2x_set_cpuclk_; |
257 | |
258 | set_lcd_custom_rate = set_lcd_custom_rate_; |
259 | unset_lcd_custom_rate = unset_lcd_custom_rate_; |
260 | set_lcd_gamma = set_lcd_gamma_; |
261 | |
262 | set_ram_timings = set_ram_timings_; |
263 | unset_ram_timings = unset_ram_timings_; |
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264 | } |
265 | |
266 | void pollux_finish(void) |
267 | { |
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268 | /* switch to default fb mem, turn portrait off */ |
269 | memregl[0x406C>>2] = fb_paddr[0]; |
270 | memregl[0x4058>>2] |= 0x10; |
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271 | close(fbdev); |
272 | |
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273 | gp2x_video_changemode_ll_(16); |
274 | unset_ram_timings_(); |
275 | if (cpuclk_was_changed) { |
276 | memregl[0xf004>>2] = pllsetreg0; |
277 | memregl[0xf07c>>2] |= 0x8000; |
278 | } |
279 | |
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280 | munmap((void *)memregs, 0x20000); |
281 | close(memdev); |
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282 | } |
283 | |