--- /dev/null
+/*
+ GP2X minimal library v0.A by rlyeh, 2005. emulnation.info@rlyeh (swap it!)
+
+ + GP2X 920t/940t CPUs library with a FIFO message system.
+ + GP2X video library with double buffering.
+ + GP2X sound library with double buffering.
+ + GP2X blitter library.
+ + GP2X timer library.
+ + GP2X joystick library.
+
+ Thanks to Squidge, Robster, snaff, Reesy and NK, for the help & previous work! :-)
+
+
+ License
+ =======
+
+ Free for non-commercial projects (it would be nice receiving a mail from you).
+ Other cases, ask me first.
+
+ GamePark Holdings is not allowed to use this library and/or use parts from it.
+
+
+ Known projects using the library or parts from it
+ =================================================
+
+ REminiscence-0.1.8 (rlyeh)
+ Atari800 GP2X pre-release 3 (foft)
+ XUMP (kedo)
+ MAME2X (Franxis)
+ DrMD for GP2X (Reesy)
+
+
+ What's new
+ ==========
+
+ 0.A: 940t disabled all time unless required
+ sound is paused by default now, use gp2x_sound_pause() to unlock it
+
+ fixed functions:
+ - gp2x_sound_play() ; increased the number of sampling buffers
+ - gp2x_timer_read() ; it should work again. broken at some point before
+ - gp2x_dualcore_launch_program_from_disk() ; it missed the code uploading call
+
+ added functions:
+ - gp2x_sound_pause()
+ - gp2x_timer_delay()
+ - gp2x_dualcore_pause()
+
+ 0.9: initial FIFO message system for dual cpu cores.
+ initial 48 Mb support.
+ initial quadruple buffering in 8bbp mode.
+
+ added functions:
+ - gp2x_dualcore_exec() ; initial FIFO message system for dual cpu cores.
+ - gp2x_dualcore_sync() ; initial FIFO message system for dual cpu cores.
+
+ improved functions:
+ - gp2x_video_flip() ; initial quadruple buffering in 8bbp mode.
+
+ 0.8: initial dual cores cpu support.
+ very basic blit functions by popular demand ;-)
+ vsync & hsync waiting code (thanks Reesy)
+
+ added functions:
+ - gp2x_launch_program() ; initial dual cores cpu support.
+ - gp2x_launch_program_from_disk() ; initial dual cores cpu support.
+ - gp2x_launch_subprogram() ; initial dual cores cpu support.
+ - gp2x_blitter_rect15() ; very basic blit function by popular demand ;-)
+ - gp2x_blitter_rect8() ; very basic blit function by popular demand ;-)
+ - gp2x_video_hsync() ; hsync waiting code (thanks Reesy)
+ - gp2x_video_vsync() ; vsync waiting code (thanks Reesy)
+
+ fixed functions:
+ - gp2x_video_color8() ; bugfixed a stupid typo (thanks Franxis for the bug report)
+
+ 0.7: added functions:
+ - gp2x_sound_volume()
+
+ fixed functions:
+ - gp2x_deinit() ; fixed menu launch code when exiting.
+
+ improved functions:
+ - gp2x_timer_read() ; rewritten timer. it should be more accurate now.
+ - gp2x_init() ; faster init code.
+
+ 0.6: added functions:
+ - gp2x_timer_read()
+ - gp2x_sound_pause()
+
+ fixed functions:
+ - gp2x_video_setpalette() ; palette handling was incorrect. fixed.
+
+ 0.5: improved functions:
+ - gp2x_init() ; better and cleaner initalizing code.
+ - gp2x_init() ; sound patched for real stereo output (by using NK's solution)
+
+ 0.4: lots of cleanups.
+ sound is threaded and double buffered now.
+ 8 bpp video support.
+
+ fixed functions:
+ - gp2x_deinit() ; better and cleaner exiting code.
+
+ 0.3: shorter library.
+
+ fixed functions:
+ - gp2x_joystick_read() ; improved joystick diagonal detection.
+
+ 0.2: better code layout.
+ public release.
+
+ 0.1: beta release.
+*/
+
+#include "minimal.h"
+
+ unsigned char *gp2x_screen8 ,*gp2x_upperRAM;
+ unsigned long gp2x_dev[8]={0,0,0,0,0,0,0,0}, gp2x_physvram[8], *gp2x_memregl, gp2x_volume, gp2x_ticks_per_second;
+volatile unsigned long gp2x_sound_pausei=1, gp2x_ticks=0, gp2x_sound=0, *gp2x_dualcore_ram;
+ unsigned short *gp2x_memregs, *gp2x_screen15, *gp2x_logvram15[4], gp2x_sound_buffer[4+((44100/25)*2)*8]; //25 Hz gives our biggest supported sampling buffer
+volatile unsigned short gp2x_palette[512];
+ pthread_t gp2x_sound_thread=0;
+
+extern void gp2x_sound_frame(void *blah, void *buff, int samples);
+
+
+void gp2x_video_flip(void)
+{
+ unsigned long address=gp2x_physvram[gp2x_physvram[7]];
+
+ if(++gp2x_physvram[7]==4) gp2x_physvram[7]=0;
+ gp2x_screen15=gp2x_logvram15[gp2x_physvram[7]];
+ gp2x_screen8=(unsigned char *)gp2x_screen15;
+
+ gp2x_memregs[0x290E>>1]=(unsigned short)(address & 0xFFFF);
+ gp2x_memregs[0x2910>>1]=(unsigned short)(address >> 16);
+ gp2x_memregs[0x2912>>1]=(unsigned short)(address & 0xFFFF);
+ gp2x_memregs[0x2914>>1]=(unsigned short)(address >> 16);
+}
+
+void gp2x_video_flip_single(void)
+{
+ unsigned long address=gp2x_physvram[0];
+
+ gp2x_screen15=gp2x_logvram15[0];
+ gp2x_screen8=(unsigned char *)gp2x_screen15;
+
+ gp2x_memregs[0x290E>>1]=(unsigned short)(address & 0xFFFF);
+ gp2x_memregs[0x2910>>1]=(unsigned short)(address >> 16);
+ gp2x_memregs[0x2912>>1]=(unsigned short)(address & 0xFFFF);
+ gp2x_memregs[0x2914>>1]=(unsigned short)(address >> 16);
+}
+
+
+void gp2x_video_setgamma(unsigned short gamma) /*0..255*/
+{
+ int i=256*3;
+ gp2x_memregs[0x295C>>1]=0;
+ while(i--) gp2x_memregs[0x295E>>1]=gamma;
+}
+
+void gp2x_video_setpalette(void)
+{
+ unsigned short *g=(unsigned short *)gp2x_palette; int i=512;
+ gp2x_memregs[0x2958>>1]=0;
+ while(i--) gp2x_memregs[0x295A>>1]=*g++;
+}
+
+void gp2x_blitter_rect15(gp2x_rect *r)
+{
+ int x, y; unsigned short *data=r->data15, *offset=&gp2x_screen15[r->x+r->y*320];
+
+ y=r->h; if(r->solid)
+ while(y--) { x=r->w; while(x--) *offset++=*data++; offset+=320-x; }
+ else
+ while(y--) { x=r->w; while(x--) { if(*data) *offset=*data; offset++, data++; }
+ offset+=320-x; }
+}
+
+void gp2x_blitter_rect8(gp2x_rect *r)
+{
+ int x, y; unsigned char *data=r->data8, *offset=&gp2x_screen8[r->x+r->y*320];
+
+ y=r->h; if(r->solid)
+ while(y--) { x=r->w; while(x--) *offset++=*data++; offset+=320-x; }
+ else
+ while(y--) { x=r->w; while(x--) { if(*data) *offset=*data; offset++, data++; }
+ offset+=320-x; }
+}
+
+unsigned long gp2x_joystick_read(void)
+{
+ unsigned long value=(gp2x_memregs[0x1198>>1] & 0x00FF);
+
+ if(value==0xFD) value=0xFA;
+ if(value==0xF7) value=0xEB;
+ if(value==0xDF) value=0xAF;
+ if(value==0x7F) value=0xBE;
+
+ return ~((gp2x_memregs[0x1184>>1] & 0xFF00) | value | (gp2x_memregs[0x1186>>1] << 16));
+}
+
+void gp2x_sound_volume(int l, int r)
+{
+ l=(((l*0x50)/100)<<8)|((r*0x50)/100); //0x5A, 0x60
+ ioctl(gp2x_dev[4], SOUND_MIXER_WRITE_PCM, &l); //SOUND_MIXER_WRITE_VOLUME
+}
+
+void gp2x_timer_delay(unsigned long ticks)
+{
+ unsigned long target=gp2x_memregl[0x0A00>>2]+ticks*gp2x_ticks_per_second;
+ while(gp2x_memregl[0x0A00>>2]<target);
+}
+
+unsigned long gp2x_timer_read(void)
+{
+ return gp2x_memregl[0x0A00>>2]/gp2x_ticks_per_second;
+}
+
+unsigned long gp2x_timer_read_ms(void)
+{
+ return gp2x_memregl[0x0A00>>2];
+}
+
+
+void gp2x_sound_pause(int yes) { gp2x_sound_pausei=yes; }
+
+
+static void *gp2x_sound_play(void *blah)
+{
+ int flip=0, flyp=gp2x_sound_buffer[1];
+ struct timespec ts; ts.tv_sec=0, ts.tv_nsec=gp2x_sound_buffer[2];
+
+ while(!gp2x_sound)
+ {
+ nanosleep(&ts, NULL);
+
+
+ if(!gp2x_sound_pausei)
+ {
+ // [1] is sound buffer size at 22050, 16, stereo, it is 1468 (367*4)
+ // [0] number of bytes?, at 22050,16,stereo, it is 367
+ // first half of buffer
+
+ // first one is 368
+
+
+ gp2x_sound_frame(blah, (void *)(&gp2x_sound_buffer[4+flip]), gp2x_sound_buffer[0]);
+ // write out to second half of buffer
+ write(gp2x_dev[3], (void *)(&gp2x_sound_buffer[4+flyp]), gp2x_sound_buffer[1]);
+
+ flip+=gp2x_sound_buffer[1];
+ if(flip==gp2x_sound_buffer[1]*8) flip=0;
+ flyp+=gp2x_sound_buffer[1];
+ if(flyp==gp2x_sound_buffer[1]*8) flyp=0;
+ }
+ }
+ return NULL;
+}
+
+static void gp2x_initqueue(gp2x_queue *q, unsigned long queue_items, unsigned long *position920t, unsigned long *position940t)
+{
+ q->head = q->tail = q->items = 0;
+ q->max_items = queue_items;
+ if(position920t) q->place920t=position920t; else q->place920t=(unsigned long *)malloc(sizeof(unsigned long) * queue_items);
+ if(position940t) q->place940t=position940t;
+ memset(q->place920t, 0, sizeof(unsigned long) * queue_items);
+}
+
+static void gp2x_enqueue(gp2x_queue *q, unsigned long data)
+{
+ while(q->items==q->max_items); /*waiting for tail to decrease...*/
+ q->place920t[q->head = (q->head < q->max_items ? q->head+1 : 0)] = data;
+ q->items++;
+}
+
+/* UNUSED
+ static unsigned long gp2x_dequeue(gp2x_queue *q)
+{
+ while(!q->items); //waiting for head to increase...
+ q->items--;
+ return q->place920t[q->tail = (q->tail < q->max_items ? q->tail+1 : 0)];
+} */
+
+
+
+ void gp2x_dualcore_pause(int yes) { if(yes) gp2x_memregs[0x0904>>1] &= 0xFFFE; else gp2x_memregs[0x0904>>1] |= 1; }
+static void gp2x_940t_reset(int yes) { gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) | (0x03); }
+static void gp2x_940t_pause(int yes) { gp2x_dualcore_pause(yes); }
+
+static void gp2x_dualcore_registers(int save)
+{
+ static unsigned short regs[8];
+
+ if(save)
+ {
+ regs[0]=gp2x_memregs[0x0904>>1]; regs[1]=gp2x_memregs[0x0912>>1];
+ regs[2]=gp2x_memregs[0x091c>>1]; regs[3]=gp2x_memregs[0x3b40>>1];
+ regs[4]=gp2x_memregs[0x3b42>>1]; regs[5]=gp2x_memregs[0x3b48>>1];
+ regs[6]=gp2x_memregs[0x3b44>>1]; regs[7]=gp2x_memregs[0x3b46>>1];
+
+ gp2x_940t_reset(1);
+ gp2x_940t_pause(1);
+ }
+ else
+ {
+ gp2x_memregs[0x0904>>1]=regs[0]; gp2x_memregs[0x0912>>1]=regs[1];
+ gp2x_memregs[0x091c>>1]=regs[2]; gp2x_memregs[0x3b40>>1]=regs[3];
+ gp2x_memregs[0x3b42>>1]=regs[4]; gp2x_memregs[0x3b48>>1]=regs[5];
+ gp2x_memregs[0x3b44>>1]=regs[6]; gp2x_memregs[0x3b46>>1]=regs[7];
+ }
+}
+
+void gp2x_dualcore_sync(void)
+{
+ gp2x_queue *q=(gp2x_queue *)gp2x_1stcore_data_ptr(GP2X_QUEUE_ARRAY_PTR);
+ while(q->items);
+}
+
+void gp2x_dualcore_exec(unsigned long command) { gp2x_enqueue((gp2x_queue *)gp2x_1stcore_data_ptr(GP2X_QUEUE_ARRAY_PTR),command); }
+
+void gp2x_dualcore_launch_program(unsigned long *area, unsigned long size)
+{
+ unsigned long i=0, *arm940t_ram=(unsigned long *)gp2x_dualcore_ram;
+
+ gp2x_940t_reset(1);
+
+ gp2x_memregs[0x3B40>>1] = 0; //disable interrupts
+ gp2x_memregs[0x3B42>>1] = 0;
+ gp2x_memregs[0x3B44>>1] = 0xffff;
+ gp2x_memregs[0x3B46>>1] = 0xffff;
+
+ gp2x_940t_pause(0);
+
+ while(i < size) *arm940t_ram++=area[i++];
+
+ gp2x_initqueue((gp2x_queue *)gp2x_1stcore_data_ptr(GP2X_QUEUE_ARRAY_PTR), GP2X_QUEUE_MAX_ITEMS, (unsigned long *)gp2x_1stcore_data_ptr(GP2X_QUEUE_DATA_PTR), (unsigned long *)gp2x_2ndcore_data_ptr(GP2X_QUEUE_DATA_PTR));
+
+ gp2x_940t_reset(0);
+}
+
+void gp2x_dualcore_launch_program_from_disk(const char *file, unsigned long offset, unsigned long size)
+{
+ FILE *in; void *data;
+
+ if((in=fopen(file, "rb"))==NULL) return;
+ if((data=malloc(size))==NULL) { fclose(in); return; }
+ fseek(in, 0L, offset);
+ fread(data, 1, size, in);
+ gp2x_dualcore_launch_program((unsigned long *)data, size);
+ free(data);
+ fclose(in);
+}
+
+void gp2x_init(int ticks_per_second, int bpp, int rate, int bits, int stereo, int Hz)
+{
+ struct fb_fix_screeninfo fixed_info;
+ static int first=1;
+
+ // GP2X_DO_SOUND
+ int gp2x_do_sound=1;
+ int frag=0;
+ int channels=1;
+ int stereoLocal=0;
+
+ gp2x_ticks_per_second=7372800/ticks_per_second;
+
+ if(!gp2x_dev[0]) gp2x_dev[0] = open("/dev/fb0", O_RDWR);
+ if(!gp2x_dev[1]) gp2x_dev[1] = open("/dev/fb1", O_RDWR);
+ if(!gp2x_dev[2]) gp2x_dev[2] = open("/dev/mem", O_RDWR);
+
+ // don't run sound right now
+ if ( gp2x_do_sound)
+ {
+ if(!gp2x_dev[3]) gp2x_dev[3] = open("/dev/dsp", O_WRONLY);
+ if(!gp2x_dev[4]) gp2x_dev[4] = open("/dev/mixer", O_RDWR);
+ }
+
+ gp2x_dualcore_ram=(unsigned long *)mmap(0, 0x1000000, PROT_READ|PROT_WRITE, MAP_SHARED, gp2x_dev[2], 0x03000000);
+/*gp2x_dualcore_ram=(unsigned long *)mmap(0, 0x2000000, PROT_READ|PROT_WRITE, MAP_SHARED, gp2x_dev[2], 0x02000000);*/
+ gp2x_memregl=(unsigned long *)mmap(0, 0x10000, PROT_READ|PROT_WRITE, MAP_SHARED, gp2x_dev[2], 0xc0000000);
+ gp2x_memregs=(unsigned short *)gp2x_memregl;
+
+ if(first) { printf(MINILIB_VERSION "\n");
+ gp2x_dualcore_registers(1);
+ gp2x_sound_volume(100,100);
+ gp2x_memregs[0x0F16>>1] = 0x830a; usleep(100000);
+ gp2x_memregs[0x0F58>>1] = 0x100c; usleep(100000); }
+
+ ioctl(gp2x_dev[gp2x_physvram[7]=0], FBIOGET_FSCREENINFO, &fixed_info);
+ gp2x_screen15=gp2x_logvram15[2]=gp2x_logvram15[0]=(unsigned short *)mmap(0, 320*240*2, PROT_WRITE, MAP_SHARED, gp2x_dev[0], 0);
+ gp2x_screen8=(unsigned char *)gp2x_screen15;
+ gp2x_physvram[2]=gp2x_physvram[0]=fixed_info.smem_start;
+
+ ioctl(gp2x_dev[1], FBIOGET_FSCREENINFO, &fixed_info);
+ gp2x_logvram15[3]=gp2x_logvram15[1]=(unsigned short *)mmap(0, 320*240*2, PROT_WRITE, MAP_SHARED, gp2x_dev[1], 0);
+ gp2x_physvram[3]=gp2x_physvram[1]=fixed_info.smem_start;
+
+ gp2x_memregs[0x28DA>>1]=(((bpp+1)/8)<<9)|0xAB; /*8/15/16/24bpp...*/
+ gp2x_memregs[0x290C>>1]=320*((bpp+1)/8); /*line width in bytes*/
+
+ memset(gp2x_screen15, 0, 320*240*2); gp2x_video_flip();
+ memset(gp2x_screen15, 0, 320*240*2); gp2x_video_flip();
+
+ if(bpp==8) gp2x_physvram[2]+=320*240, gp2x_physvram[3]+=320*240,
+ gp2x_logvram15[2]+=320*240/2, gp2x_logvram15[3]+=320*240/2;
+
+
+ if ( gp2x_do_sound)
+ {
+
+ ioctl(gp2x_dev[3], SNDCTL_DSP_SPEED, &rate);
+ ioctl(gp2x_dev[3], SNDCTL_DSP_SETFMT, &bits);
+
+ ioctl(gp2x_dev[3], SNDCTL_DSP_CHANNELS, &channels);
+ ioctl(gp2x_dev[3], SNDCTL_DSP_STEREO, &stereoLocal);
+
+ frag = 0x40000|13;
+ ioctl(gp2x_dev[3], SNDCTL_DSP_SETFRAGMENT, &frag);
+
+
+ printf("minimal() do sound, rate %d, bits %d, stereo %d, frag %d\n", rate, bits, stereo, frag);
+
+ if(first)
+ {
+ first=0;
+ }
+ }
+
+}
+
+
+extern int fcloseall(void);
+void gp2x_deinit(void)
+{
+ while((gp2x_sound++)<1000000); //wait arm920t threads to finish
+
+ gp2x_dualcore_registers(0);
+
+ gp2x_memregs[0x28DA>>1]=0x4AB; //set video mode
+ gp2x_memregs[0x290C>>1]=640;
+
+ { int i; for(i=0;i<8;i++) if(gp2x_dev[i]) close(gp2x_dev[i]); } //close all devices
+
+ fcloseall(); //close all files
+
+}
+
+
+void SetVideoScaling(int pixels,int width,int height)
+{
+ float x, y;
+ float xscale,yscale;
+
+ int bpp=(gp2x_memregs[0x28DA>>1]>>9)&0x3; /* bytes per pixel */
+
+ if(gp2x_memregs[0x2800>>1]&0x100) /* TV-Out ON? */
+ {
+ xscale=489.0; /* X-Scale with TV-Out (PAL or NTSC) */
+ if (gp2x_memregs[0x2818>>1] == 287) /* PAL? */
+ yscale=(pixels*274.0)/320.0; /* Y-Scale with PAL */
+ else if (gp2x_memregs[0x2818>>1] == 239) /* NTSC? */
+ yscale=(pixels*331.0)/320.0; /* Y-Scale with NTSC */
+ }
+ else /* TV-Out OFF? */
+ {
+ xscale=1024.0; /* X-Scale for LCD */
+ yscale=pixels; /* Y-Scale for LCD */
+ }
+
+ x=(xscale*width)/320.0;
+ y=(yscale*bpp*height)/240.0;
+ gp2x_memregs[0x2906>>1]=(unsigned short)x; /* scale horizontal */
+ gp2x_memregl[0x2908>>2]=(unsigned long)y; /* scale vertical */
+ gp2x_memregs[0x290C>>1]=pixels*bpp; /* Set Video Width */
+}
notaz.gp2x.de / fceu.git / blobdiff