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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; |
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22 | static int battdev = -1; |
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23 | |
24 | extern void *gp2x_screens[4]; |
25 | |
26 | #define fb_buf_count 4 |
27 | static unsigned int fb_paddr[fb_buf_count]; |
28 | static int fb_work_buf; |
29 | static int fbdev = -1; |
30 | |
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31 | static char cpuclk_was_changed = 0; |
32 | static unsigned short memtimex_old[2]; |
33 | static unsigned int pllsetreg0; |
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34 | static int last_pal_setting = 0; |
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35 | |
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36 | |
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37 | /* misc */ |
38 | static void pollux_set_fromenv(const char *env_var) |
39 | { |
40 | const char *set_string; |
41 | set_string = getenv(env_var); |
42 | if (set_string) |
43 | pollux_set(memregs, set_string); |
44 | else |
45 | printf("env var %s not defined.\n", env_var); |
46 | } |
47 | |
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48 | /* video stuff */ |
49 | static void pollux_video_flip(int buf_count) |
50 | { |
51 | memregl[0x406C>>2] = fb_paddr[fb_work_buf]; |
52 | memregl[0x4058>>2] |= 0x10; |
53 | fb_work_buf++; |
54 | if (fb_work_buf >= buf_count) |
55 | fb_work_buf = 0; |
56 | g_screen_ptr = gp2x_screens[fb_work_buf]; |
57 | } |
58 | |
59 | static void gp2x_video_flip_(void) |
60 | { |
61 | pollux_video_flip(fb_buf_count); |
62 | } |
63 | |
64 | /* doulblebuffered flip */ |
65 | static void gp2x_video_flip2_(void) |
66 | { |
67 | pollux_video_flip(2); |
68 | } |
69 | |
70 | static void gp2x_video_changemode_ll_(int bpp) |
71 | { |
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72 | static int prev_bpp = 0; |
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73 | int code = 0, bytes = 2; |
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74 | int rot_cmd[2] = { 0, 0 }; |
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75 | unsigned int r; |
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76 | char buff[32]; |
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77 | int ret; |
78 | |
79 | if (bpp == prev_bpp) |
80 | return; |
81 | prev_bpp = bpp; |
82 | |
83 | printf("changemode: %dbpp rot=%d\n", abs(bpp), bpp < 0); |
84 | |
85 | /* negative bpp means rotated mode */ |
86 | rot_cmd[0] = (bpp < 0) ? 6 : 5; |
87 | ret = ioctl(fbdev, _IOW('D', 90, int[2]), rot_cmd); |
88 | if (ret < 0) |
89 | perror("rot ioctl failed"); |
90 | memregl[0x4004>>2] = (bpp < 0) ? 0x013f00ef : 0x00ef013f; |
91 | memregl[0x4000>>2] |= 1 << 3; |
92 | |
93 | /* the above ioctl resets LCD timings, so set them here */ |
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94 | snprintf(buff, sizeof(buff), "POLLUX_LCD_TIMINGS_%s", last_pal_setting ? "PAL" : "NTSC"); |
95 | pollux_set_fromenv(buff); |
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96 | |
97 | switch (abs(bpp)) |
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98 | { |
99 | case 8: |
100 | code = 0x443a; |
101 | bytes = 1; |
102 | break; |
103 | |
104 | case 15: |
105 | case 16: |
106 | code = 0x4432; |
107 | bytes = 2; |
108 | break; |
109 | |
110 | default: |
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111 | printf("unhandled bpp request: %d\n", abs(bpp)); |
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112 | return; |
113 | } |
114 | |
115 | memregl[0x405c>>2] = bytes; |
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116 | memregl[0x4060>>2] = bytes * (bpp < 0 ? 240 : 320); |
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117 | |
118 | r = memregl[0x4058>>2]; |
119 | r = (r & 0xffff) | (code << 16) | 0x10; |
120 | memregl[0x4058>>2] = r; |
121 | } |
122 | |
123 | static void gp2x_video_setpalette_(int *pal, int len) |
124 | { |
125 | /* pollux palette is 16bpp only.. */ |
126 | int i; |
127 | for (i = 0; i < len; i++) |
128 | { |
129 | int c = pal[i]; |
130 | c = ((c >> 8) & 0xf800) | ((c >> 5) & 0x07c0) | ((c >> 3) & 0x001f); |
131 | memregl[0x4070>>2] = (i << 24) | c; |
132 | } |
133 | } |
134 | |
135 | static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H) |
136 | { |
137 | /* maybe a job for 3d hardware? */ |
138 | } |
139 | |
140 | static void gp2x_video_wait_vsync_(void) |
141 | { |
142 | while (!(memregl[0x308c>>2] & (1 << 10))); |
143 | spend_cycles(128); |
144 | memregl[0x308c>>2] |= 1 << 10; |
145 | } |
146 | |
147 | /* CPU clock */ |
148 | static void gp2x_set_cpuclk_(unsigned int mhz) |
149 | { |
150 | char buff[24]; |
151 | snprintf(buff, sizeof(buff), "cpuclk=%u", mhz); |
152 | pollux_set(memregs, buff); |
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153 | |
154 | cpuclk_was_changed = 1; |
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155 | } |
156 | |
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157 | /* RAM timings */ |
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158 | static void set_ram_timings_(void) |
159 | { |
160 | pollux_set_fromenv("POLLUX_RAM_TIMINGS"); |
161 | } |
162 | |
163 | static void unset_ram_timings_(void) |
164 | { |
165 | int i; |
166 | |
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167 | memregs[0x14802>>1] = memtimex_old[0]; |
168 | memregs[0x14804>>1] = memtimex_old[1] | 0x8000; |
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169 | |
170 | for (i = 0; i < 0x100000; i++) |
171 | if (!(memregs[0x14804>>1] & 0x8000)) |
172 | break; |
173 | |
174 | printf("RAM timings reset to startup values.\n"); |
175 | } |
176 | |
177 | /* LCD refresh */ |
178 | static void set_lcd_custom_rate_(int is_pal) |
179 | { |
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180 | /* just remember PAL/NTSC. We always set timings in _changemode_ll() */ |
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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 | |
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193 | static int gp2x_read_battery_(void) |
194 | { |
195 | unsigned short magic_val = 0; |
196 | |
197 | if (battdev < 0) |
198 | return -1; |
199 | if (read(battdev, &magic_val, sizeof(magic_val)) != sizeof(magic_val)) |
200 | return -1; |
201 | switch (magic_val) { |
202 | default: |
203 | case 1: return 100; |
204 | case 2: return 66; |
205 | case 3: return 40; |
206 | case 4: return 0; |
207 | } |
208 | } |
209 | |
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210 | #define TIMER_BASE3 0x1980 |
211 | #define TIMER_REG(x) memregl[(TIMER_BASE3 + x) >> 2] |
212 | |
213 | unsigned int gp2x_get_ticks_us_(void) |
214 | { |
215 | TIMER_REG(0x08) = 0x4b; /* run timer, latch value */ |
216 | return TIMER_REG(0); |
217 | } |
218 | |
219 | unsigned int gp2x_get_ticks_ms_(void) |
220 | { |
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221 | /* approximate /= 1000 */ |
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222 | unsigned long long v64; |
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223 | v64 = (unsigned long long)gp2x_get_ticks_us_() * 4294968; |
224 | return v64 >> 32; |
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225 | } |
226 | |
227 | static void timer_cleanup(void) |
228 | { |
229 | TIMER_REG(0x40) = 0x0c; /* be sure clocks are on */ |
230 | TIMER_REG(0x08) = 0x23; /* stop the timer, clear irq in case it's pending */ |
231 | TIMER_REG(0x00) = 0; /* clear counter */ |
232 | TIMER_REG(0x40) = 0; /* clocks off */ |
233 | TIMER_REG(0x44) = 0; /* dividers back to default */ |
234 | } |
235 | |
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236 | void pollux_init(void) |
237 | { |
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238 | struct fb_fix_screeninfo fbfix; |
239 | int i, ret; |
240 | |
241 | memdev = open("/dev/mem", O_RDWR); |
242 | if (memdev == -1) { |
243 | perror("open(/dev/mem) failed"); |
244 | exit(1); |
245 | } |
246 | |
247 | memregs = mmap(0, 0x20000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000); |
248 | if (memregs == MAP_FAILED) { |
249 | perror("mmap(memregs) failed"); |
250 | exit(1); |
251 | } |
252 | memregl = (volatile void *)memregs; |
253 | |
254 | fbdev = open("/dev/fb0", O_RDWR); |
255 | if (fbdev < 0) { |
256 | perror("can't open fbdev"); |
257 | exit(1); |
258 | } |
259 | |
260 | ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix); |
261 | if (ret == -1) { |
262 | perror("ioctl(fbdev) failed"); |
263 | exit(1); |
264 | } |
265 | |
266 | printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start); |
267 | fb_paddr[0] = fbfix.smem_start; |
268 | |
269 | gp2x_screens[0] = mmap(0, 320*240*2*fb_buf_count, PROT_READ|PROT_WRITE, |
270 | MAP_SHARED, memdev, fb_paddr[0]); |
271 | if (gp2x_screens[0] == MAP_FAILED) |
272 | { |
273 | perror("mmap(gp2x_screens) failed"); |
274 | exit(1); |
275 | } |
276 | memset(gp2x_screens[0], 0, 320*240*2*fb_buf_count); |
277 | |
278 | printf(" %p -> %08x\n", gp2x_screens[0], fb_paddr[0]); |
279 | for (i = 1; i < fb_buf_count; i++) |
280 | { |
281 | fb_paddr[i] = fb_paddr[i-1] + 320*240*2; |
282 | gp2x_screens[i] = (char *)gp2x_screens[i-1] + 320*240*2; |
283 | printf(" %p -> %08x\n", gp2x_screens[i], fb_paddr[i]); |
284 | } |
285 | fb_work_buf = 0; |
286 | g_screen_ptr = gp2x_screens[0]; |
287 | |
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288 | battdev = open("/dev/pollux_batt", O_RDONLY); |
289 | if (battdev < 0) |
290 | perror("Warning: could't open pollux_batt"); |
291 | |
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292 | /* setup timer */ |
293 | if (TIMER_REG(0x08) & 8) |
294 | timer_cleanup(); |
295 | |
296 | TIMER_REG(0x44) = 0x922; /* using PLL1, divider value 147 */ |
297 | TIMER_REG(0x40) = 0x0c; /* clocks on */ |
298 | TIMER_REG(0x08) = 0x6b; /* run timer, clear irq, latch value */ |
299 | |
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300 | pllsetreg0 = memregl[0xf004>>2]; |
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301 | memtimex_old[0] = memregs[0x14802>>1]; |
302 | memtimex_old[1] = memregs[0x14804>>1]; |
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303 | |
304 | gp2x_video_flip = gp2x_video_flip_; |
305 | gp2x_video_flip2 = gp2x_video_flip2_; |
306 | gp2x_video_changemode_ll = gp2x_video_changemode_ll_; |
307 | gp2x_video_setpalette = gp2x_video_setpalette_; |
308 | gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_; |
309 | gp2x_video_wait_vsync = gp2x_video_wait_vsync_; |
310 | |
311 | gp2x_set_cpuclk = gp2x_set_cpuclk_; |
312 | |
313 | set_lcd_custom_rate = set_lcd_custom_rate_; |
314 | unset_lcd_custom_rate = unset_lcd_custom_rate_; |
315 | set_lcd_gamma = set_lcd_gamma_; |
316 | |
317 | set_ram_timings = set_ram_timings_; |
318 | unset_ram_timings = unset_ram_timings_; |
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319 | gp2x_read_battery = gp2x_read_battery_; |
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320 | |
321 | gp2x_get_ticks_ms = gp2x_get_ticks_ms_; |
322 | gp2x_get_ticks_us = gp2x_get_ticks_us_; |
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323 | } |
324 | |
325 | void pollux_finish(void) |
326 | { |
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327 | /* switch to default fb mem, turn portrait off */ |
328 | memregl[0x406C>>2] = fb_paddr[0]; |
329 | memregl[0x4058>>2] |= 0x10; |
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330 | close(fbdev); |
331 | |
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332 | gp2x_video_changemode_ll_(16); |
333 | unset_ram_timings_(); |
334 | if (cpuclk_was_changed) { |
335 | memregl[0xf004>>2] = pllsetreg0; |
336 | memregl[0xf07c>>2] |= 0x8000; |
337 | } |
338 | |
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339 | munmap((void *)memregs, 0x20000); |
340 | close(memdev); |
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341 | if (battdev >= 0) |
342 | close(battdev); |
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343 | } |
344 | |