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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 | |
37 | /* video stuff */ |
38 | static void pollux_video_flip(int buf_count) |
39 | { |
40 | memregl[0x406C>>2] = fb_paddr[fb_work_buf]; |
41 | memregl[0x4058>>2] |= 0x10; |
42 | fb_work_buf++; |
43 | if (fb_work_buf >= buf_count) |
44 | fb_work_buf = 0; |
45 | g_screen_ptr = gp2x_screens[fb_work_buf]; |
46 | } |
47 | |
48 | static void gp2x_video_flip_(void) |
49 | { |
50 | pollux_video_flip(fb_buf_count); |
51 | } |
52 | |
53 | /* doulblebuffered flip */ |
54 | static void gp2x_video_flip2_(void) |
55 | { |
56 | pollux_video_flip(2); |
57 | } |
58 | |
59 | static void gp2x_video_changemode_ll_(int bpp) |
60 | { |
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61 | static int prev_bpp = 0; |
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62 | int code = 0, bytes = 2; |
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63 | int rot_cmd[2] = { 0, 0 }; |
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64 | unsigned int r; |
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65 | int ret; |
66 | |
67 | if (bpp == prev_bpp) |
68 | return; |
69 | prev_bpp = bpp; |
70 | |
71 | printf("changemode: %dbpp rot=%d\n", abs(bpp), bpp < 0); |
72 | |
73 | /* negative bpp means rotated mode */ |
74 | rot_cmd[0] = (bpp < 0) ? 6 : 5; |
75 | ret = ioctl(fbdev, _IOW('D', 90, int[2]), rot_cmd); |
76 | if (ret < 0) |
77 | perror("rot ioctl failed"); |
78 | memregl[0x4004>>2] = (bpp < 0) ? 0x013f00ef : 0x00ef013f; |
79 | memregl[0x4000>>2] |= 1 << 3; |
80 | |
81 | /* the above ioctl resets LCD timings, so set them here */ |
82 | set_lcd_custom_rate(last_pal_setting); |
83 | |
84 | switch (abs(bpp)) |
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85 | { |
86 | case 8: |
87 | code = 0x443a; |
88 | bytes = 1; |
89 | break; |
90 | |
91 | case 15: |
92 | case 16: |
93 | code = 0x4432; |
94 | bytes = 2; |
95 | break; |
96 | |
97 | default: |
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98 | printf("unhandled bpp request: %d\n", abs(bpp)); |
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99 | return; |
100 | } |
101 | |
102 | memregl[0x405c>>2] = bytes; |
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103 | memregl[0x4060>>2] = bytes * (bpp < 0 ? 240 : 320); |
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104 | |
105 | r = memregl[0x4058>>2]; |
106 | r = (r & 0xffff) | (code << 16) | 0x10; |
107 | memregl[0x4058>>2] = r; |
108 | } |
109 | |
110 | static void gp2x_video_setpalette_(int *pal, int len) |
111 | { |
112 | /* pollux palette is 16bpp only.. */ |
113 | int i; |
114 | for (i = 0; i < len; i++) |
115 | { |
116 | int c = pal[i]; |
117 | c = ((c >> 8) & 0xf800) | ((c >> 5) & 0x07c0) | ((c >> 3) & 0x001f); |
118 | memregl[0x4070>>2] = (i << 24) | c; |
119 | } |
120 | } |
121 | |
122 | static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H) |
123 | { |
124 | /* maybe a job for 3d hardware? */ |
125 | } |
126 | |
127 | static void gp2x_video_wait_vsync_(void) |
128 | { |
129 | while (!(memregl[0x308c>>2] & (1 << 10))); |
130 | spend_cycles(128); |
131 | memregl[0x308c>>2] |= 1 << 10; |
132 | } |
133 | |
134 | /* CPU clock */ |
135 | static void gp2x_set_cpuclk_(unsigned int mhz) |
136 | { |
137 | char buff[24]; |
138 | snprintf(buff, sizeof(buff), "cpuclk=%u", mhz); |
139 | pollux_set(memregs, buff); |
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140 | |
141 | cpuclk_was_changed = 1; |
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142 | } |
143 | |
144 | /* misc */ |
145 | static void pollux_set_fromenv(const char *env_var) |
146 | { |
147 | const char *set_string; |
148 | set_string = getenv(env_var); |
149 | if (set_string) |
150 | pollux_set(memregs, set_string); |
151 | else |
152 | printf("env var %s not defined.\n", env_var); |
153 | } |
154 | |
155 | /* RAM timings */ |
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156 | static void set_ram_timings_(void) |
157 | { |
158 | pollux_set_fromenv("POLLUX_RAM_TIMINGS"); |
159 | } |
160 | |
161 | static void unset_ram_timings_(void) |
162 | { |
163 | int i; |
164 | |
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165 | memregs[0x14802>>1] = memtimex_old[0]; |
166 | memregs[0x14804>>1] = memtimex_old[1] | 0x8000; |
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167 | |
168 | for (i = 0; i < 0x100000; i++) |
169 | if (!(memregs[0x14804>>1] & 0x8000)) |
170 | break; |
171 | |
172 | printf("RAM timings reset to startup values.\n"); |
173 | } |
174 | |
175 | /* LCD refresh */ |
176 | static void set_lcd_custom_rate_(int is_pal) |
177 | { |
178 | char buff[32]; |
179 | |
180 | snprintf(buff, sizeof(buff), "POLLUX_LCD_TIMINGS_%s", is_pal ? "PAL" : "NTSC"); |
181 | pollux_set_fromenv(buff); |
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182 | last_pal_setting = is_pal; |
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183 | } |
184 | |
185 | static void unset_lcd_custom_rate_(void) |
186 | { |
187 | } |
188 | |
189 | static void set_lcd_gamma_(int g100, int A_SNs_curve) |
190 | { |
191 | /* hm, the LCD possibly can do it (but not POLLUX) */ |
192 | } |
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193 | |
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194 | static int gp2x_read_battery_(void) |
195 | { |
196 | unsigned short magic_val = 0; |
197 | |
198 | if (battdev < 0) |
199 | return -1; |
200 | if (read(battdev, &magic_val, sizeof(magic_val)) != sizeof(magic_val)) |
201 | return -1; |
202 | switch (magic_val) { |
203 | default: |
204 | case 1: return 100; |
205 | case 2: return 66; |
206 | case 3: return 40; |
207 | case 4: return 0; |
208 | } |
209 | } |
210 | |
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211 | #define TIMER_BASE3 0x1980 |
212 | #define TIMER_REG(x) memregl[(TIMER_BASE3 + x) >> 2] |
213 | |
214 | unsigned int gp2x_get_ticks_us_(void) |
215 | { |
216 | TIMER_REG(0x08) = 0x4b; /* run timer, latch value */ |
217 | return TIMER_REG(0); |
218 | } |
219 | |
220 | unsigned int gp2x_get_ticks_ms_(void) |
221 | { |
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222 | /* approximate /= 1000 */ |
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223 | unsigned long long v64; |
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224 | v64 = (unsigned long long)gp2x_get_ticks_us_() * 4294968; |
225 | return v64 >> 32; |
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226 | } |
227 | |
228 | static void timer_cleanup(void) |
229 | { |
230 | TIMER_REG(0x40) = 0x0c; /* be sure clocks are on */ |
231 | TIMER_REG(0x08) = 0x23; /* stop the timer, clear irq in case it's pending */ |
232 | TIMER_REG(0x00) = 0; /* clear counter */ |
233 | TIMER_REG(0x40) = 0; /* clocks off */ |
234 | TIMER_REG(0x44) = 0; /* dividers back to default */ |
235 | } |
236 | |
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237 | void pollux_init(void) |
238 | { |
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239 | struct fb_fix_screeninfo fbfix; |
240 | int i, ret; |
241 | |
242 | memdev = open("/dev/mem", O_RDWR); |
243 | if (memdev == -1) { |
244 | perror("open(/dev/mem) failed"); |
245 | exit(1); |
246 | } |
247 | |
248 | memregs = mmap(0, 0x20000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000); |
249 | if (memregs == MAP_FAILED) { |
250 | perror("mmap(memregs) failed"); |
251 | exit(1); |
252 | } |
253 | memregl = (volatile void *)memregs; |
254 | |
255 | fbdev = open("/dev/fb0", O_RDWR); |
256 | if (fbdev < 0) { |
257 | perror("can't open fbdev"); |
258 | exit(1); |
259 | } |
260 | |
261 | ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix); |
262 | if (ret == -1) { |
263 | perror("ioctl(fbdev) failed"); |
264 | exit(1); |
265 | } |
266 | |
267 | printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start); |
268 | fb_paddr[0] = fbfix.smem_start; |
269 | |
270 | gp2x_screens[0] = mmap(0, 320*240*2*fb_buf_count, PROT_READ|PROT_WRITE, |
271 | MAP_SHARED, memdev, fb_paddr[0]); |
272 | if (gp2x_screens[0] == MAP_FAILED) |
273 | { |
274 | perror("mmap(gp2x_screens) failed"); |
275 | exit(1); |
276 | } |
277 | memset(gp2x_screens[0], 0, 320*240*2*fb_buf_count); |
278 | |
279 | printf(" %p -> %08x\n", gp2x_screens[0], fb_paddr[0]); |
280 | for (i = 1; i < fb_buf_count; i++) |
281 | { |
282 | fb_paddr[i] = fb_paddr[i-1] + 320*240*2; |
283 | gp2x_screens[i] = (char *)gp2x_screens[i-1] + 320*240*2; |
284 | printf(" %p -> %08x\n", gp2x_screens[i], fb_paddr[i]); |
285 | } |
286 | fb_work_buf = 0; |
287 | g_screen_ptr = gp2x_screens[0]; |
288 | |
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289 | battdev = open("/dev/pollux_batt", O_RDONLY); |
290 | if (battdev < 0) |
291 | perror("Warning: could't open pollux_batt"); |
292 | |
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293 | /* setup timer */ |
294 | if (TIMER_REG(0x08) & 8) |
295 | timer_cleanup(); |
296 | |
297 | TIMER_REG(0x44) = 0x922; /* using PLL1, divider value 147 */ |
298 | TIMER_REG(0x40) = 0x0c; /* clocks on */ |
299 | TIMER_REG(0x08) = 0x6b; /* run timer, clear irq, latch value */ |
300 | |
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301 | pllsetreg0 = memregl[0xf004>>2]; |
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302 | memtimex_old[0] = memregs[0x14802>>1]; |
303 | memtimex_old[1] = memregs[0x14804>>1]; |
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304 | |
305 | gp2x_video_flip = gp2x_video_flip_; |
306 | gp2x_video_flip2 = gp2x_video_flip2_; |
307 | gp2x_video_changemode_ll = gp2x_video_changemode_ll_; |
308 | gp2x_video_setpalette = gp2x_video_setpalette_; |
309 | gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_; |
310 | gp2x_video_wait_vsync = gp2x_video_wait_vsync_; |
311 | |
312 | gp2x_set_cpuclk = gp2x_set_cpuclk_; |
313 | |
314 | set_lcd_custom_rate = set_lcd_custom_rate_; |
315 | unset_lcd_custom_rate = unset_lcd_custom_rate_; |
316 | set_lcd_gamma = set_lcd_gamma_; |
317 | |
318 | set_ram_timings = set_ram_timings_; |
319 | unset_ram_timings = unset_ram_timings_; |
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320 | gp2x_read_battery = gp2x_read_battery_; |
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321 | |
322 | gp2x_get_ticks_ms = gp2x_get_ticks_ms_; |
323 | gp2x_get_ticks_us = gp2x_get_ticks_us_; |
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324 | } |
325 | |
326 | void pollux_finish(void) |
327 | { |
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328 | /* switch to default fb mem, turn portrait off */ |
329 | memregl[0x406C>>2] = fb_paddr[0]; |
330 | memregl[0x4058>>2] |= 0x10; |
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331 | close(fbdev); |
332 | |
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333 | gp2x_video_changemode_ll_(16); |
334 | unset_ram_timings_(); |
335 | if (cpuclk_was_changed) { |
336 | memregl[0xf004>>2] = pllsetreg0; |
337 | memregl[0xf07c>>2] |= 0x8000; |
338 | } |
339 | |
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340 | munmap((void *)memregs, 0x20000); |
341 | close(memdev); |
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342 | if (battdev >= 0) |
343 | close(battdev); |
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344 | } |
345 | |