mirror of
https://github.com/RaySollium99/libpicofe.git
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112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
/*
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* (C) Gražvydas "notaz" Ignotas, 2009-2010
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*
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* This work is licensed under the terms of any of these licenses
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* (at your option):
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* - GNU GPL, version 2 or later.
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* - GNU LGPL, version 2.1 or later.
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* - MAME license.
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* See the COPYING file in the top-level directory.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#include "soc.h"
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void (*gp2x_video_flip)(void);
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void (*gp2x_video_flip2)(void);
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void (*gp2x_video_changemode_ll)(int bpp);
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void (*gp2x_video_setpalette)(int *pal, int len);
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void (*gp2x_video_RGB_setscaling)(int ln_offs, int W, int H);
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void (*gp2x_video_wait_vsync)(void);
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void (*gp2x_set_cpuclk)(unsigned int mhz);
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void (*set_lcd_custom_rate)(int is_pal);
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void (*unset_lcd_custom_rate)(void);
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void (*set_lcd_gamma)(int g100, int A_SNs_curve);
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void (*set_ram_timings)(void);
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void (*unset_ram_timings)(void);
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int (*gp2x_read_battery)(void);
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unsigned int (*gp2x_get_ticks_ms)(void);
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unsigned int (*gp2x_get_ticks_us)(void);
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gp2x_soc_t soc_detect(void)
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{
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volatile unsigned short *memregs;
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volatile unsigned int *memregl;
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static gp2x_soc_t ret = -2;
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int pollux_chipname[0x30/4 + 1];
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char *pollux_chipname_c = (char *)pollux_chipname;
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int memdev;
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int i;
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if ((int)ret != -2)
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/* already detected */
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return ret;
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memdev = open("/dev/mem", O_RDONLY);
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if (memdev == -1)
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{
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perror("open(/dev/mem)");
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ret = -1;
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return -1;
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}
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memregs = mmap(0, 0x20000, PROT_READ, MAP_SHARED, memdev, 0xc0000000);
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if (memregs == MAP_FAILED)
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{
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perror("mmap(memregs)");
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close(memdev);
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ret = -1;
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return -1;
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}
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memregl = (volatile void *)memregs;
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if (memregs[0x1836>>1] == 0x2330)
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{
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printf("looks like this is MMSP2\n");
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ret = SOCID_MMSP2;
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goto out;
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}
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/* perform word reads. Byte reads might also work,
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* but we don't want to play with that. */
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for (i = 0; i < 0x30; i += 4)
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{
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pollux_chipname[i >> 2] = memregl[(0x1f810 + i) >> 2];
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}
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pollux_chipname_c[0x30] = 0;
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for (i = 0; i < 0x30; i++)
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{
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unsigned char c = pollux_chipname_c[i];
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if (c < 0x20 || c > 0x7f)
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goto not_pollux_like;
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}
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printf("found pollux-like id: \"%s\"\n", pollux_chipname_c);
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if (strncmp(pollux_chipname_c, "MAGICEYES-LEAPFROG-LF1000", 25) ||
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strncmp(pollux_chipname_c, "MAGICEYES-POLLUX", 16))
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{
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ret = SOCID_POLLUX;
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goto out;
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}
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not_pollux_like:
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out:
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munmap((void *)memregs, 0x20000);
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close(memdev);
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return ret;
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}
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