[libpicofe.git] / gp2x / soc_mmsp2.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>

#include "soc.h"
#include "soc_mmsp2.h"
#include "plat_gp2x.h"
#include "../common/emu.h"
#include "../common/arm_utils.h"
#include "940ctl.h"

volatile unsigned short *gp2x_memregs;
volatile unsigned long  *gp2x_memregl;
extern void *gp2x_screens[4];
static int screensel = 0;

int memdev = -1;	/* used by code940 */
static int touchdev = -1;
static int touchcal[7] = { 6203, 0, -1501397, 0, -4200, 16132680, 65536 };

#define FRAMEBUFF_SIZE  0x30000
#define FRAMEBUFF_WHOLESIZE (FRAMEBUFF_SIZE*4) // 320*240*2 + some more
#define FRAMEBUFF_ADDR0 (0x4000000 - FRAMEBUFF_WHOLESIZE)
#define FRAMEBUFF_ADDR1 (FRAMEBUFF_ADDR0 + FRAMEBUFF_SIZE)
#define FRAMEBUFF_ADDR2 (FRAMEBUFF_ADDR1 + FRAMEBUFF_SIZE)
#define FRAMEBUFF_ADDR3 (FRAMEBUFF_ADDR2 + FRAMEBUFF_SIZE)

static const int gp2x_screenaddrs[4] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };
static int gp2x_screenaddrs_use[4];
static unsigned short gp2x_screenaddr_old[4];


/* video stuff */
static void gp2x_video_flip_(void)
{
	unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3];
	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16);

  	gp2x_memregs[0x2910>>1] = msw;
  	gp2x_memregs[0x2914>>1] = msw;
	gp2x_memregs[0x290E>>1] = lsw;
  	gp2x_memregs[0x2912>>1] = lsw;

	// jump to other buffer:
	g_screen_ptr = gp2x_screens[++screensel&3];
}

/* doulblebuffered flip */
static void gp2x_video_flip2_(void)
{
	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16);

  	gp2x_memregs[0x2910>>1] = msw;
  	gp2x_memregs[0x2914>>1] = msw;
	gp2x_memregs[0x290E>>1] = 0;
  	gp2x_memregs[0x2912>>1] = 0;

	// jump to other buffer:
	g_screen_ptr = gp2x_screens[++screensel&1];
}

static void gp2x_video_changemode_ll_(int bpp)
{
  	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*/
}

static void gp2x_video_setpalette_(int *pal, int len)
{
	unsigned short *g = (unsigned short *)pal;
	volatile unsigned short *memreg = &gp2x_memregs[0x295A>>1];

	gp2x_memregs[0x2958>>1] = 0;

	len *= 2;
	while (len--)
		*memreg = *g++;
}

static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H)
{
	float escalaw, escalah;
	int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;
	unsigned short scalw;

	// set offset
	gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp;
	gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp;
	gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp;
	gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp;

	escalaw = 1024.0; // RGB Horiz LCD
	escalah = 320.0; // RGB Vert LCD

	if (gp2x_memregs[0x2800>>1]&0x100) //TV-Out
	{
		escalaw=489.0; // RGB Horiz TV (PAL, NTSC)
		if (gp2x_memregs[0x2818>>1]  == 287) //PAL
			escalah=274.0; // RGB Vert TV PAL
		else if (gp2x_memregs[0x2818>>1]  == 239) //NTSC
			escalah=331.0; // RGB Vert TV NTSC
	}

	// scale horizontal
	scalw = (unsigned short)((float)escalaw *(W/320.0));
	/* if there is no horizontal scaling, vertical doesn't work.
	 * Here is a nasty wrokaround... */
	if (H != 240 && W == 320) scalw--;
	gp2x_memregs[0x2906>>1]=scalw;
	// scale vertical
	gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah *bpp *(H/240.0));
}

static void gp2x_video_wait_vsync_(void)
{
	unsigned short v = gp2x_memregs[0x1182>>1];
	while (!((v ^ gp2x_memregs[0x1182>>1]) & 0x10))
		spend_cycles(1024);
}

/* 940 */
void pause940(int yes)
{
	if (yes)
		gp2x_memregs[0x0904>>1] &= 0xFFFE;
	else
		gp2x_memregs[0x0904>>1] |= 1;
}

void reset940(int yes, int bank)
{
	gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) | (bank & 0x03);
}

/*
 * CPU clock
 * Fout = (m * Fin) / (p * 2^s)
 * m = MDIV+8, p = PDIV+2, s = SDIV
 *
 * m = (Fout * p * 2^s) / Fin
 */

#define SYS_CLK_FREQ 7372800

static void gp2x_set_cpuclk_(unsigned int mhz)
{
	unsigned int mdiv, pdiv, sdiv = 0;
	unsigned int v;
	int i;

	pdiv = 3;
	mdiv = (mhz * pdiv * 1000000) / SYS_CLK_FREQ;
	if (mdiv & ~0xff) {
		fprintf(stderr, "invalid cpuclk MHz: %u\n", mhz);
		return;
	}
	v = ((mdiv-8)<<8) | ((pdiv-2)<<2) | sdiv;
	gp2x_memregs[0x910>>1] = v;

	for (i = 0; i < 10000; i++)
		if (!(gp2x_memregs[0x902>>1] & 1))
			break;
}

/* RAM timings */
static unsigned short memtimex[2];

#define TIMING_CHECK(t, adj, mask) \
	t += adj; \
	if (t & ~mask) \
		goto bad

static void set_ram_timing_vals(int tCAS, int tRC, int tRAS, int tWR, int tMRD, int tRFC, int tRP, int tRCD)
{
	int i;
	TIMING_CHECK(tCAS, -2, 0x1);
	TIMING_CHECK(tRC,  -1, 0xf);
	TIMING_CHECK(tRAS, -1, 0xf);
	TIMING_CHECK(tWR,  -1, 0xf);
	TIMING_CHECK(tMRD, -1, 0xf);
	TIMING_CHECK(tRFC, -1, 0xf);
	TIMING_CHECK(tRP,  -1, 0xf);
	TIMING_CHECK(tRCD, -1, 0xf);

	/* get spend_cycles() into cache */
	spend_cycles(1);

	gp2x_memregs[0x3802>>1] = ((tMRD & 0xF) << 12) | ((tRFC & 0xF) << 8) | ((tRP & 0xF) << 4) | (tRCD & 0xF);
	gp2x_memregs[0x3804>>1] = 0x8000 | ((tCAS & 1) << 12) | ((tRC & 0xF) << 8) | ((tRAS & 0xF) << 4) | (tWR & 0xF);

	/* be sure we don't access the mem while it's being reprogrammed */
	spend_cycles(128*1024);
	for (i = 0; i < 8*1024; i++)
		if (!(gp2x_memregs[0x3804>>1] & 0x8000))
			break;

	printf("RAM timings set.\n");
	return;
bad:
	fprintf(stderr, "RAM timings invalid.\n");
}

static void set_ram_timings_(void)
{
	/* craigix: --cas 2 --trc 6 --tras 4 --twr 1 --tmrd 1 --trfc 1 --trp 2 --trcd 2 */
	set_ram_timing_vals(2, 6, 4, 1, 1, 1, 2, 2);
}

static void unset_ram_timings_(void)
{
	gp2x_memregs[0x3802>>1] = memtimex[0];
	gp2x_memregs[0x3804>>1] = memtimex[1] | 0x8000;
	printf("RAM timings reset to startup values.\n");
}

/* LCD refresh */
typedef struct
{
	unsigned short reg, valmask, val;
}
reg_setting;

/* 120.00 97/0/2/7|25/ 7/ 7/11/37 */
static const reg_setting lcd_rate_120[] =
{
	{ 0x0914, 0xffff, (97<<8)|(0<<2)|2 },	/* UPLLSETVREG */
	{ 0x0924, 0xff00, (2<<14)|(7<<8) },	/* DISPCSETREG */
	{ 0x281A, 0x00ff, 25 },			/* .HSWID(T2) */
	{ 0x281C, 0x00ff, 7 },			/* .HSSTR(T8) */
	{ 0x281E, 0x00ff, 7 },			/* .HSEND(T7) */
	{ 0x2822, 0x01ff, 11 },			/* .VSEND (T9) */
	{ 0x2826, 0x0ff0, 37<<4 },		/* .DESTR(T3) */
	{ 0, 0, 0 }
};

/* 100.00 96/0/2/7|29/25/53/15/37 */
static const reg_setting lcd_rate_100[] =
{
	{ 0x0914, 0xffff, (96<<8)|(0<<2)|2 },	/* UPLLSETVREG */
	{ 0x0924, 0xff00, (2<<14)|(7<<8) },	/* DISPCSETREG */
	{ 0x281A, 0x00ff, 29 },			/* .HSWID(T2) */
	{ 0x281C, 0x00ff, 25 },			/* .HSSTR(T8) */
	{ 0x281E, 0x00ff, 53 },			/* .HSEND(T7) */
	{ 0x2822, 0x01ff, 15 },			/* .VSEND (T9) */
	{ 0x2826, 0x0ff0, 37<<4 },		/* .DESTR(T3) */
	{ 0, 0, 0 }
};

static reg_setting lcd_rate_defaults[] =
{
	{ 0x0914, 0xffff, 0 },
	{ 0x0924, 0xff00, 0 },
	{ 0x281A, 0x00ff, 0 },
	{ 0x281C, 0x00ff, 0 },
	{ 0x281E, 0x00ff, 0 },
	{ 0x2822, 0x01ff, 0 },
	{ 0x2826, 0x0ff0, 0 },
	{ 0, 0, 0 }
};

static void get_reg_setting(reg_setting *set)
{
	for (; set->reg; set++)
	{
		unsigned short val = gp2x_memregs[set->reg >> 1];
		val &= set->valmask;
		set->val = val;
	}
}

static void set_reg_setting(const reg_setting *set)
{
	for (; set->reg; set++)
	{
		unsigned short val = gp2x_memregs[set->reg >> 1];
		val &= ~set->valmask;
		val |= set->val;
		gp2x_memregs[set->reg >> 1] = val;
	}
}

static void set_lcd_custom_rate_(int is_pal)
{
	if (gp2x_memregs[0x2800>>1] & 0x100) // tv-out
		return;

	printf("setting custom LCD refresh (%d Hz)... ", is_pal ? 100 : 120);
	fflush(stdout);

	set_reg_setting(is_pal ? lcd_rate_100 : lcd_rate_120);
	printf("done.\n");
}

static void unset_lcd_custom_rate_(void)
{
	printf("reset to prev LCD refresh.\n");
	set_reg_setting(lcd_rate_defaults);
}

static void set_lcd_gamma_(int g100, int A_SNs_curve)
{
	float gamma = (float) g100 / 100;
	int i;
	gamma = 1 / gamma;

	/* enable gamma */
	gp2x_memregs[0x2880>>1] &= ~(1<<12);

	gp2x_memregs[0x295C>>1] = 0;
	for (i = 0; i < 256; i++)
	{
		unsigned char g;
		unsigned short s;
		const unsigned short grey50=143, grey75=177, grey25=97;
		double blah;

		if (A_SNs_curve)
		{
			// The next formula is all about gaussian interpolation
			blah = ((  -128 * exp(-powf((float) i/64.0f + 2.0f , 2.0f))) +
				(   -64 * exp(-powf((float) i/64.0f + 1.0f , 2.0f))) +
				(grey25 * exp(-powf((float) i/64.0f - 1.0f , 2.0f))) +
				(grey50 * exp(-powf((float) i/64.0f - 2.0f , 2.0f))) +
				(grey75 * exp(-powf((float) i/64.0f - 3.0f , 2.0f))) +
				(   256 * exp(-powf((float) i/64.0f - 4.0f , 2.0f))) +
				(   320 * exp(-powf((float) i/64.0f - 5.0f , 2.0f))) +
				(   384 * exp(-powf((float) i/64.0f - 6.0f , 2.0f)))) / 1.772637;
			blah += 0.5;
		}
		else
		{
			blah = i;
		}

		g = (unsigned char)(255.0 * pow(blah/255.0, gamma));
		//printf("%d : %d\n", i, g);
		s = (g<<8) | g;
		gp2x_memregs[0x295E>>1]= s;
		gp2x_memregs[0x295E>>1]= g;
	}
}


/* these are not quite MMSP2 related,
 * more to GP2X F100/F200 consoles themselves. */
typedef struct ucb1x00_ts_event
{
	unsigned short pressure;
	unsigned short x;
	unsigned short y;
	unsigned short pad;
	struct timeval stamp;
} UCB1X00_TS_EVENT;

int gp2x_touchpad_read(int *x, int *y)
{
	UCB1X00_TS_EVENT event;
	static int zero_seen = 0;
	int retval;

	if (touchdev < 0) return -1;

	retval = read(touchdev, &event, sizeof(event));
	if (retval <= 0) {
		perror("touch read failed");
		return -1;
	}
	// this is to ignore the messed-up 4.1.x driver
	if (event.pressure == 0) zero_seen = 1;

	if (x) *x = (event.x * touchcal[0] + touchcal[2]) >> 16;
	if (y) *y = (event.y * touchcal[4] + touchcal[5]) >> 16;
	// printf("read %i %i %i\n", event.pressure, *x, *y);

	return zero_seen ? event.pressure : 0;
}

static void proc_set(const char *path, const char *val)
{
	FILE *f;
	char tmp[16];

	f = fopen(path, "w");
	if (f == NULL) {
		printf("failed to open: %s\n", path);
		return;
	}

	fprintf(f, "0\n");
	fclose(f);

	printf("\"%s\" is set to: ", path);
	f = fopen(path, "r");
	if (f == NULL) {
		printf("(open failed)\n");
		return;
	}

	fgets(tmp, sizeof(tmp), f);
	printf("%s", tmp);
	fclose(f);
}


void mmsp2_init(void)
{
	int i;

  	memdev = open("/dev/mem", O_RDWR);
	if (memdev == -1)
	{
		perror("open(\"/dev/mem\")");
		exit(1);
	}

	gp2x_memregs = mmap(0, 0x10000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);
	if (gp2x_memregs == MAP_FAILED)
	{
		perror("mmap(memregs)");
		exit(1);
	}
	gp2x_memregl = (unsigned long *) gp2x_memregs;

	gp2x_memregs[0x2880>>1] &= ~0x383; // disable cursor, subpict, osd, video layers

  	gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED,
		memdev, gp2x_screenaddrs[0]);
	if (gp2x_screens[0] == MAP_FAILED)
	{
		perror("mmap(g_screen_ptr)");
		exit(1);
	}
	printf("framebuffers:\n");
	printf("  %08x -> %p\n", gp2x_screenaddrs[0], gp2x_screens[0]);
	for (i = 1; i < 4; i++)
	{
		gp2x_screens[i] = (char *) gp2x_screens[i - 1] + FRAMEBUFF_SIZE;
		printf("  %08x -> %p\n", gp2x_screenaddrs[i], gp2x_screens[i]);
	}

	g_screen_ptr = gp2x_screens[0];
	screensel = 0;

	gp2x_screenaddr_old[0] = gp2x_memregs[0x290E>>1];
	gp2x_screenaddr_old[1] = gp2x_memregs[0x2910>>1];
	gp2x_screenaddr_old[2] = gp2x_memregs[0x2912>>1];
	gp2x_screenaddr_old[3] = gp2x_memregs[0x2914>>1];

	memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));

	/* default LCD refresh */
	get_reg_setting(lcd_rate_defaults);

	/* RAM timings */
	memtimex[0] = gp2x_memregs[0x3802>>1];
	memtimex[1] = gp2x_memregs[0x3804>>1];

	/* touchscreen */
	touchdev = open("/dev/touchscreen/wm97xx", O_RDONLY);
	if (touchdev >= 0) {
		FILE *pcf = fopen("/etc/pointercal", "r");
		if (pcf) {
			fscanf(pcf, "%d %d %d %d %d %d %d", &touchcal[0], &touchcal[1],
				&touchcal[2], &touchcal[3], &touchcal[4], &touchcal[5], &touchcal[6]);
			fclose(pcf);
		}
		printf("found touchscreen/wm97xx\n");
	}

	/* disable Linux read-ahead */
	proc_set("/proc/sys/vm/max-readahead", "0\n");
	proc_set("/proc/sys/vm/min-readahead", "0\n");

	/* code940 portion */
	sharedmem940_init();

	gp2x_video_flip = gp2x_video_flip_;
	gp2x_video_flip2 = gp2x_video_flip2_;
	gp2x_video_changemode_ll = gp2x_video_changemode_ll_;
	gp2x_video_setpalette = gp2x_video_setpalette_;
	gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_;
	gp2x_video_wait_vsync = gp2x_video_wait_vsync_;

	gp2x_set_cpuclk = gp2x_set_cpuclk_;

	set_lcd_custom_rate = set_lcd_custom_rate_;
	unset_lcd_custom_rate = unset_lcd_custom_rate_;
	set_lcd_gamma = set_lcd_gamma_;

	set_ram_timings = set_ram_timings_;
	unset_ram_timings = unset_ram_timings_;
}

void mmsp2_finish(void)
{
	reset940(1, 3);
	pause940(1);
	sharedmem940_finish();

	gp2x_memregs[0x290E>>1] = gp2x_screenaddr_old[0];
	gp2x_memregs[0x2910>>1] = gp2x_screenaddr_old[1];
	gp2x_memregs[0x2912>>1] = gp2x_screenaddr_old[2];
	gp2x_memregs[0x2914>>1] = gp2x_screenaddr_old[3];

	unset_ram_timings_();
	unset_lcd_custom_rate_();

	munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);
	munmap((void *)gp2x_memregs, 0x10000);
	close(memdev);
	if (touchdev >= 0)
		close(touchdev);
}
Commit	Line	Data
d572cbad	1	#include <stdio.h>
	2	#include <stdlib.h>
	3	#include <string.h>
fa5e045b	4	#include <math.h>
d572cbad	5	#include <sys/types.h>
	6	#include <sys/stat.h>
	7	#include <fcntl.h>
	8	#include <sys/mman.h>
	9	#include <unistd.h>
	10
	11	#include "soc.h"
	12	#include "soc_mmsp2.h"
fa5e045b	13	#include "plat_gp2x.h"
d572cbad	14	#include "../common/emu.h"
d572cbad	15	#include "../common/arm_utils.h"
fa5e045b	16	#include "940ctl.h"
d572cbad	17
	18	volatile unsigned short *gp2x_memregs;
	19	volatile unsigned long *gp2x_memregl;
	20	extern void *gp2x_screens[4];
	21	static int screensel = 0;
	22
fa8d1331	23	int memdev = -1; /* used by code940 */
d572cbad	24	static int touchdev = -1;
	25	static int touchcal[7] = { 6203, 0, -1501397, 0, -4200, 16132680, 65536 };
	26
	27	#define FRAMEBUFF_SIZE 0x30000
	28	#define FRAMEBUFF_WHOLESIZE (FRAMEBUFF_SIZE4) // 320240*2 + some more
	29	#define FRAMEBUFF_ADDR0 (0x4000000 - FRAMEBUFF_WHOLESIZE)
	30	#define FRAMEBUFF_ADDR1 (FRAMEBUFF_ADDR0 + FRAMEBUFF_SIZE)
	31	#define FRAMEBUFF_ADDR2 (FRAMEBUFF_ADDR1 + FRAMEBUFF_SIZE)
	32	#define FRAMEBUFF_ADDR3 (FRAMEBUFF_ADDR2 + FRAMEBUFF_SIZE)
	33
	34	static const int gp2x_screenaddrs[4] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };
	35	static int gp2x_screenaddrs_use[4];
	36	static unsigned short gp2x_screenaddr_old[4];
	37
	38
	39	/* video stuff */
fa8d1331	40	static void gp2x_video_flip_(void)
d572cbad	41	{
	42	unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3];
	43	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16);
	44
	45	gp2x_memregs[0x2910>>1] = msw;
	46	gp2x_memregs[0x2914>>1] = msw;
	47	gp2x_memregs[0x290E>>1] = lsw;
	48	gp2x_memregs[0x2912>>1] = lsw;
	49
	50	// jump to other buffer:
	51	g_screen_ptr = gp2x_screens[++screensel&3];
	52	}
	53
	54	/* doulblebuffered flip */
fa8d1331	55	static void gp2x_video_flip2_(void)
d572cbad	56	{
	57	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16);
	58
	59	gp2x_memregs[0x2910>>1] = msw;
	60	gp2x_memregs[0x2914>>1] = msw;
	61	gp2x_memregs[0x290E>>1] = 0;
	62	gp2x_memregs[0x2912>>1] = 0;
	63
	64	// jump to other buffer:
	65	g_screen_ptr = gp2x_screens[++screensel&1];
	66	}
	67
fa8d1331	68	static void gp2x_video_changemode_ll_(int bpp)
d572cbad	69	{
	70	gp2x_memregs[0x28DA>>1] = (((bpp+1)/8)<<9)\|0xAB; /8/15/16/24bpp.../
	71	gp2x_memregs[0x290C>>1] = 320((bpp+1)/8); /line width in bytes*/
	72	}
	73
fa8d1331	74	static void gp2x_video_setpalette_(int *pal, int len)
d572cbad	75	{
	76	unsigned short g = (unsigned short )pal;
	77	volatile unsigned short *memreg = &gp2x_memregs[0x295A>>1];
	78
	79	gp2x_memregs[0x2958>>1] = 0;
	80
	81	len *= 2;
	82	while (len--)
	83	memreg = g++;
	84	}
	85
fa8d1331	86	static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H)
d572cbad	87	{
	88	float escalaw, escalah;
	89	int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;
	90	unsigned short scalw;
	91
	92	// set offset
	93	gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp;
	94	gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp;
	95	gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp;
	96	gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp;
	97
	98	escalaw = 1024.0; // RGB Horiz LCD
	99	escalah = 320.0; // RGB Vert LCD
	100
fa8d1331	101	if (gp2x_memregs[0x2800>>1]&0x100) //TV-Out
d572cbad	102	{
	103	escalaw=489.0; // RGB Horiz TV (PAL, NTSC)
	104	if (gp2x_memregs[0x2818>>1] == 287) //PAL
	105	escalah=274.0; // RGB Vert TV PAL
	106	else if (gp2x_memregs[0x2818>>1] == 239) //NTSC
	107	escalah=331.0; // RGB Vert TV NTSC
	108	}
	109
	110	// scale horizontal
	111	scalw = (unsigned short)((float)escalaw *(W/320.0));
fa8d1331	112	/* if there is no horizontal scaling, vertical doesn't work.
fa8d1331	113	* Here is a nasty wrokaround... */
d572cbad	114	if (H != 240 && W == 320) scalw--;
	115	gp2x_memregs[0x2906>>1]=scalw;
	116	// scale vertical
	117	gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah bpp (H/240.0));
	118	}
	119
fa8d1331	120	static void gp2x_video_wait_vsync_(void)
d572cbad	121	{
	122	unsigned short v = gp2x_memregs[0x1182>>1];
	123	while (!((v ^ gp2x_memregs[0x1182>>1]) & 0x10))
	124	spend_cycles(1024);
	125	}
	126
	127	/* 940 */
	128	void pause940(int yes)
	129	{
	130	if (yes)
	131	gp2x_memregs[0x0904>>1] &= 0xFFFE;
	132	else
	133	gp2x_memregs[0x0904>>1] \|= 1;
	134	}
	135
	136	void reset940(int yes, int bank)
	137	{
	138	gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) \| (bank & 0x03);
	139	}
	140
fa5e045b	141	/*
	142	* CPU clock
	143	* Fout = (m * Fin) / (p * 2^s)
	144	* m = MDIV+8, p = PDIV+2, s = SDIV
	145	*
	146	* m = (Fout * p * 2^s) / Fin
	147	*/
	148
	149	#define SYS_CLK_FREQ 7372800
	150
fa8d1331	151	static void gp2x_set_cpuclk_(unsigned int mhz)
fa5e045b	152	{
	153	unsigned int mdiv, pdiv, sdiv = 0;
	154	unsigned int v;
	155	int i;
	156
	157	pdiv = 3;
	158	mdiv = (mhz * pdiv * 1000000) / SYS_CLK_FREQ;
	159	if (mdiv & ~0xff) {
	160	fprintf(stderr, "invalid cpuclk MHz: %u\n", mhz);
	161	return;
	162	}
	163	v = ((mdiv-8)<<8) \| ((pdiv-2)<<2) \| sdiv;
	164	gp2x_memregs[0x910>>1] = v;
	165
	166	for (i = 0; i < 10000; i++)
	167	if (!(gp2x_memregs[0x902>>1] & 1))
	168	break;
	169	}
	170
	171	/* RAM timings */
	172	static unsigned short memtimex[2];
	173
	174	#define TIMING_CHECK(t, adj, mask) \
	175	t += adj; \
	176	if (t & ~mask) \
	177	goto bad
	178
fa8d1331	179	static void set_ram_timing_vals(int tCAS, int tRC, int tRAS, int tWR, int tMRD, int tRFC, int tRP, int tRCD)
fa5e045b	180	{
	181	int i;
	182	TIMING_CHECK(tCAS, -2, 0x1);
	183	TIMING_CHECK(tRC, -1, 0xf);
	184	TIMING_CHECK(tRAS, -1, 0xf);
	185	TIMING_CHECK(tWR, -1, 0xf);
	186	TIMING_CHECK(tMRD, -1, 0xf);
	187	TIMING_CHECK(tRFC, -1, 0xf);
	188	TIMING_CHECK(tRP, -1, 0xf);
	189	TIMING_CHECK(tRCD, -1, 0xf);
	190
	191	/* get spend_cycles() into cache */
	192	spend_cycles(1);
	193
	194	gp2x_memregs[0x3802>>1] = ((tMRD & 0xF) << 12) \| ((tRFC & 0xF) << 8) \| ((tRP & 0xF) << 4) \| (tRCD & 0xF);
	195	gp2x_memregs[0x3804>>1] = 0x8000 \| ((tCAS & 1) << 12) \| ((tRC & 0xF) << 8) \| ((tRAS & 0xF) << 4) \| (tWR & 0xF);
	196
	197	/* be sure we don't access the mem while it's being reprogrammed */
	198	spend_cycles(128*1024);
	199	for (i = 0; i < 8*1024; i++)
	200	if (!(gp2x_memregs[0x3804>>1] & 0x8000))
	201	break;
	202
	203	printf("RAM timings set.\n");
	204	return;
	205	bad:
	206	fprintf(stderr, "RAM timings invalid.\n");
	207	}
	208
fa8d1331	209	static void set_ram_timings_(void)
	210	{
	211	/* craigix: --cas 2 --trc 6 --tras 4 --twr 1 --tmrd 1 --trfc 1 --trp 2 --trcd 2 */
	212	set_ram_timing_vals(2, 6, 4, 1, 1, 1, 2, 2);
	213	}
	214
	215	static void unset_ram_timings_(void)
fa5e045b	216	{
	217	gp2x_memregs[0x3802>>1] = memtimex[0];
	218	gp2x_memregs[0x3804>>1] = memtimex[1] \| 0x8000;
	219	printf("RAM timings reset to startup values.\n");
	220	}
	221
	222	/* LCD refresh */
	223	typedef struct
	224	{
	225	unsigned short reg, valmask, val;
	226	}
	227	reg_setting;
	228
	229	/* 120.00 97/0/2/7\|25/ 7/ 7/11/37 */
	230	static const reg_setting lcd_rate_120[] =
	231	{
	232	{ 0x0914, 0xffff, (97<<8)\|(0<<2)\|2 }, /* UPLLSETVREG */
	233	{ 0x0924, 0xff00, (2<<14)\|(7<<8) }, /* DISPCSETREG */
	234	{ 0x281A, 0x00ff, 25 }, /* .HSWID(T2) */
	235	{ 0x281C, 0x00ff, 7 }, /* .HSSTR(T8) */
	236	{ 0x281E, 0x00ff, 7 }, /* .HSEND(T7) */
	237	{ 0x2822, 0x01ff, 11 }, /* .VSEND (T9) */
	238	{ 0x2826, 0x0ff0, 37<<4 }, /* .DESTR(T3) */
	239	{ 0, 0, 0 }
	240	};
	241
	242	/* 100.00 96/0/2/7\|29/25/53/15/37 */
	243	static const reg_setting lcd_rate_100[] =
	244	{
	245	{ 0x0914, 0xffff, (96<<8)\|(0<<2)\|2 }, /* UPLLSETVREG */
	246	{ 0x0924, 0xff00, (2<<14)\|(7<<8) }, /* DISPCSETREG */
	247	{ 0x281A, 0x00ff, 29 }, /* .HSWID(T2) */
	248	{ 0x281C, 0x00ff, 25 }, /* .HSSTR(T8) */
	249	{ 0x281E, 0x00ff, 53 }, /* .HSEND(T7) */
	250	{ 0x2822, 0x01ff, 15 }, /* .VSEND (T9) */
	251	{ 0x2826, 0x0ff0, 37<<4 }, /* .DESTR(T3) */
	252	{ 0, 0, 0 }
	253	};
	254
	255	static reg_setting lcd_rate_defaults[] =
	256	{
	257	{ 0x0914, 0xffff, 0 },
	258	{ 0x0924, 0xff00, 0 },
	259	{ 0x281A, 0x00ff, 0 },
	260	{ 0x281C, 0x00ff, 0 },
	261	{ 0x281E, 0x00ff, 0 },
	262	{ 0x2822, 0x01ff, 0 },
	263	{ 0x2826, 0x0ff0, 0 },
	264	{ 0, 0, 0 }
	265	};
	266
	267	static void get_reg_setting(reg_setting *set)
	268	{
	269	for (; set->reg; set++)
	270	{
	271	unsigned short val = gp2x_memregs[set->reg >> 1];
	272	val &= set->valmask;
	273	set->val = val;
	274	}
	275	}
	276
	277	static void set_reg_setting(const reg_setting *set)
	278	{
	279	for (; set->reg; set++)
280	{
281	unsigned short val = gp2x_memregs[set->reg >> 1];
282	val &= ~set->valmask;
283	val \|= set->val;
284	gp2x_memregs[set->reg >> 1] = val;
285	}
286	}
287
fa8d1331	288	static void set_lcd_custom_rate_(int is_pal)
fa5e045b	289	{
	290	if (gp2x_memregs[0x2800>>1] & 0x100) // tv-out
	291	return;
	292
	293	printf("setting custom LCD refresh (%d Hz)... ", is_pal ? 100 : 120);
	294	fflush(stdout);
	295
	296	set_reg_setting(is_pal ? lcd_rate_100 : lcd_rate_120);
	297	printf("done.\n");
	298	}
	299
fa8d1331	300	static void unset_lcd_custom_rate_(void)
fa5e045b	301	{
	302	printf("reset to prev LCD refresh.\n");
	303	set_reg_setting(lcd_rate_defaults);
	304	}
	305
fa8d1331	306	static void set_lcd_gamma_(int g100, int A_SNs_curve)
fa5e045b	307	{
	308	float gamma = (float) g100 / 100;
	309	int i;
	310	gamma = 1 / gamma;
	311
	312	/* enable gamma */
	313	gp2x_memregs[0x2880>>1] &= ~(1<<12);
	314
	315	gp2x_memregs[0x295C>>1] = 0;
	316	for (i = 0; i < 256; i++)
	317	{
	318	unsigned char g;
	319	unsigned short s;
	320	const unsigned short grey50=143, grey75=177, grey25=97;
	321	double blah;
	322
	323	if (A_SNs_curve)
	324	{
	325	// The next formula is all about gaussian interpolation
	326	blah = (( -128 * exp(-powf((float) i/64.0f + 2.0f , 2.0f))) +
	327	( -64 * exp(-powf((float) i/64.0f + 1.0f , 2.0f))) +
	328	(grey25 * exp(-powf((float) i/64.0f - 1.0f , 2.0f))) +
	329	(grey50 * exp(-powf((float) i/64.0f - 2.0f , 2.0f))) +
	330	(grey75 * exp(-powf((float) i/64.0f - 3.0f , 2.0f))) +
	331	( 256 * exp(-powf((float) i/64.0f - 4.0f , 2.0f))) +
	332	( 320 * exp(-powf((float) i/64.0f - 5.0f , 2.0f))) +
	333	( 384 * exp(-powf((float) i/64.0f - 6.0f , 2.0f)))) / 1.772637;
	334	blah += 0.5;
	335	}
	336	else
	337	{
	338	blah = i;
	339	}
	340
	341	g = (unsigned char)(255.0 * pow(blah/255.0, gamma));
	342	//printf("%d : %d\n", i, g);
	343	s = (g<<8) \| g;
	344	gp2x_memregs[0x295E>>1]= s;
	345	gp2x_memregs[0x295E>>1]= g;
	346	}
	347	}
	348
d572cbad	349
	350	/* these are not quite MMSP2 related,
	351	* more to GP2X F100/F200 consoles themselves. */
	352	typedef struct ucb1x00_ts_event
	353	{
	354	unsigned short pressure;
	355	unsigned short x;
	356	unsigned short y;
	357	unsigned short pad;
	358	struct timeval stamp;
	359	} UCB1X00_TS_EVENT;
	360
	361	int gp2x_touchpad_read(int x, int y)
	362	{
	363	UCB1X00_TS_EVENT event;
	364	static int zero_seen = 0;
	365	int retval;
	366
	367	if (touchdev < 0) return -1;
	368
	369	retval = read(touchdev, &event, sizeof(event));
	370	if (retval <= 0) {
	371	perror("touch read failed");
	372	return -1;
	373	}
	374	// this is to ignore the messed-up 4.1.x driver
	375	if (event.pressure == 0) zero_seen = 1;
	376
	377	if (x) x = (event.x touchcal[0] + touchcal[2]) >> 16;
	378	if (y) y = (event.y touchcal[4] + touchcal[5]) >> 16;
	379	// printf("read %i %i %i\n", event.pressure, x, y);
	380
	381	return zero_seen ? event.pressure : 0;
	382	}
	383
	384	static void proc_set(const char path, const char val)
	385	{
	386	FILE *f;
	387	char tmp[16];
	388
	389	f = fopen(path, "w");
	390	if (f == NULL) {
	391	printf("failed to open: %s\n", path);
	392	return;
	393	}
	394
	395	fprintf(f, "0\n");
	396	fclose(f);
	397
	398	printf("\"%s\" is set to: ", path);
	399	f = fopen(path, "r");
	400	if (f == NULL) {
	401	printf("(open failed)\n");
	402	return;
	403	}
	404
	405	fgets(tmp, sizeof(tmp), f);
	406	printf("%s", tmp);
	407	fclose(f);
	408	}
	409
	410
	411	void mmsp2_init(void)
	412	{
413	int i;
414
415	memdev = open("/dev/mem", O_RDWR);
416	if (memdev == -1)
417	{
418	perror("open(\"/dev/mem\")");
419	exit(1);
420	}
421
422	gp2x_memregs = mmap(0, 0x10000, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);
423	if (gp2x_memregs == MAP_FAILED)
424	{
425	perror("mmap(memregs)");
426	exit(1);
427	}
428	gp2x_memregl = (unsigned long *) gp2x_memregs;
429
430	gp2x_memregs[0x2880>>1] &= ~0x383; // disable cursor, subpict, osd, video layers
431
432	gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED,
433	memdev, gp2x_screenaddrs[0]);
434	if (gp2x_screens[0] == MAP_FAILED)
435	{
436	perror("mmap(g_screen_ptr)");
437	exit(1);
438	}
439	printf("framebuffers:\n");
440	printf(" %08x -> %p\n", gp2x_screenaddrs[0], gp2x_screens[0]);
441	for (i = 1; i < 4; i++)
442	{
443	gp2x_screens[i] = (char *) gp2x_screens[i - 1] + FRAMEBUFF_SIZE;
444	printf(" %08x -> %p\n", gp2x_screenaddrs[i], gp2x_screens[i]);
445	}
446
447	g_screen_ptr = gp2x_screens[0];
448	screensel = 0;
449
450	gp2x_screenaddr_old[0] = gp2x_memregs[0x290E>>1];
451	gp2x_screenaddr_old[1] = gp2x_memregs[0x2910>>1];
452	gp2x_screenaddr_old[2] = gp2x_memregs[0x2912>>1];
453	gp2x_screenaddr_old[3] = gp2x_memregs[0x2914>>1];
454
455	memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));
456
fa5e045b	457	/* default LCD refresh */
	458	get_reg_setting(lcd_rate_defaults);
	459
	460	/* RAM timings */
	461	memtimex[0] = gp2x_memregs[0x3802>>1];
	462	memtimex[1] = gp2x_memregs[0x3804>>1];
	463
	464	/* touchscreen */
d572cbad	465	touchdev = open("/dev/touchscreen/wm97xx", O_RDONLY);
	466	if (touchdev >= 0) {
	467	FILE *pcf = fopen("/etc/pointercal", "r");
	468	if (pcf) {
	469	fscanf(pcf, "%d %d %d %d %d %d %d", &touchcal[0], &touchcal[1],
	470	&touchcal[2], &touchcal[3], &touchcal[4], &touchcal[5], &touchcal[6]);
	471	fclose(pcf);
	472	}
	473	printf("found touchscreen/wm97xx\n");
	474	}
	475
	476	/* disable Linux read-ahead */
	477	proc_set("/proc/sys/vm/max-readahead", "0\n");
	478	proc_set("/proc/sys/vm/min-readahead", "0\n");
fa5e045b	479
	480	/* code940 portion */
	481	sharedmem940_init();
fa8d1331	482
	483	gp2x_video_flip = gp2x_video_flip_;
	484	gp2x_video_flip2 = gp2x_video_flip2_;
	485	gp2x_video_changemode_ll = gp2x_video_changemode_ll_;
	486	gp2x_video_setpalette = gp2x_video_setpalette_;
	487	gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_;
	488	gp2x_video_wait_vsync = gp2x_video_wait_vsync_;
	489
	490	gp2x_set_cpuclk = gp2x_set_cpuclk_;
	491
	492	set_lcd_custom_rate = set_lcd_custom_rate_;
	493	unset_lcd_custom_rate = unset_lcd_custom_rate_;
	494	set_lcd_gamma = set_lcd_gamma_;
	495
	496	set_ram_timings = set_ram_timings_;
	497	unset_ram_timings = unset_ram_timings_;
d572cbad	498	}
	499
	500	void mmsp2_finish(void)
	501	{
	502	reset940(1, 3);
	503	pause940(1);
fa5e045b	504	sharedmem940_finish();
d572cbad	505
	506	gp2x_memregs[0x290E>>1] = gp2x_screenaddr_old[0];
	507	gp2x_memregs[0x2910>>1] = gp2x_screenaddr_old[1];
	508	gp2x_memregs[0x2912>>1] = gp2x_screenaddr_old[2];
	509	gp2x_memregs[0x2914>>1] = gp2x_screenaddr_old[3];
	510
fa8d1331	511	unset_ram_timings_();
fa8d1331	512	unset_lcd_custom_rate_();
fa5e045b	513
d572cbad	514	munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);
	515	munmap((void *)gp2x_memregs, 0x10000);
	516	close(memdev);
	517	if (touchdev >= 0)
	518	close(touchdev);
	519	}
	520