[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 "../emu.h"
#include "../plat.h"
#include "../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 char gamma_was_changed = 0;
static char cpuclk_was_changed = 0;
static unsigned short gp2x_screenaddr_old[4];
static unsigned short memtimex_old[2];
static unsigned short reg0910;

/* 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;

	cpuclk_was_changed = 1;
}

/* RAM timings */
#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_old[0];
	gp2x_memregs[0x3804>>1] = memtimex_old[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;
	}

	gamma_was_changed = 1;
}

static int gp2x_read_battery_(void)
{
	return -1; /* TODO? */
}

/* 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));

	/* save startup values: LCD refresh */
	get_reg_setting(lcd_rate_defaults);

	/* CPU and RAM timings */
	reg0910 = gp2x_memregs[0x0910>>1];
	memtimex_old[0] = gp2x_memregs[0x3802>>1];
	memtimex_old[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_;
	gp2x_read_battery = gp2x_read_battery_;

	gp2x_get_ticks_ms = plat_get_ticks_ms_good;
	gp2x_get_ticks_us = plat_get_ticks_us_good;
}

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

	gp2x_video_RGB_setscaling_(0, 320, 240);
	gp2x_video_changemode_ll_(16);

	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_lcd_custom_rate_();
	if (gamma_was_changed)
		set_lcd_gamma_(100, 0);
	unset_ram_timings_();
	if (cpuclk_was_changed)
		gp2x_memregs[0x910>>1] = reg0910;

	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"
a86e9a3e	14	#include "../emu.h"
	15	#include "../plat.h"
	16	#include "../arm_utils.h"
fa5e045b	17	#include "940ctl.h"
d572cbad	18
	19	volatile unsigned short *gp2x_memregs;
	20	volatile unsigned long *gp2x_memregl;
	21	extern void *gp2x_screens[4];
	22	static int screensel = 0;
	23
fa8d1331	24	int memdev = -1; /* used by code940 */
d572cbad	25	static int touchdev = -1;
	26	static int touchcal[7] = { 6203, 0, -1501397, 0, -4200, 16132680, 65536 };
	27
	28	#define FRAMEBUFF_SIZE 0x30000
	29	#define FRAMEBUFF_WHOLESIZE (FRAMEBUFF_SIZE4) // 320240*2 + some more
	30	#define FRAMEBUFF_ADDR0 (0x4000000 - FRAMEBUFF_WHOLESIZE)
	31	#define FRAMEBUFF_ADDR1 (FRAMEBUFF_ADDR0 + FRAMEBUFF_SIZE)
	32	#define FRAMEBUFF_ADDR2 (FRAMEBUFF_ADDR1 + FRAMEBUFF_SIZE)
	33	#define FRAMEBUFF_ADDR3 (FRAMEBUFF_ADDR2 + FRAMEBUFF_SIZE)
	34
	35	static const int gp2x_screenaddrs[4] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };
	36	static int gp2x_screenaddrs_use[4];
71769e27	37
	38	static char gamma_was_changed = 0;
	39	static char cpuclk_was_changed = 0;
d572cbad	40	static unsigned short gp2x_screenaddr_old[4];
71769e27	41	static unsigned short memtimex_old[2];
71769e27	42	static unsigned short reg0910;
d572cbad	43
d572cbad	44	/* video stuff */
fa8d1331	45	static void gp2x_video_flip_(void)
d572cbad	46	{
	47	unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3];
	48	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16);
	49
	50	gp2x_memregs[0x2910>>1] = msw;
	51	gp2x_memregs[0x2914>>1] = msw;
	52	gp2x_memregs[0x290E>>1] = lsw;
	53	gp2x_memregs[0x2912>>1] = lsw;
	54
	55	// jump to other buffer:
	56	g_screen_ptr = gp2x_screens[++screensel&3];
	57	}
	58
	59	/* doulblebuffered flip */
fa8d1331	60	static void gp2x_video_flip2_(void)
d572cbad	61	{
	62	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16);
	63
	64	gp2x_memregs[0x2910>>1] = msw;
	65	gp2x_memregs[0x2914>>1] = msw;
	66	gp2x_memregs[0x290E>>1] = 0;
	67	gp2x_memregs[0x2912>>1] = 0;
	68
	69	// jump to other buffer:
	70	g_screen_ptr = gp2x_screens[++screensel&1];
	71	}
	72
fa8d1331	73	static void gp2x_video_changemode_ll_(int bpp)
d572cbad	74	{
	75	gp2x_memregs[0x28DA>>1] = (((bpp+1)/8)<<9)\|0xAB; /8/15/16/24bpp.../
	76	gp2x_memregs[0x290C>>1] = 320((bpp+1)/8); /line width in bytes*/
	77	}
	78
fa8d1331	79	static void gp2x_video_setpalette_(int *pal, int len)
d572cbad	80	{
	81	unsigned short g = (unsigned short )pal;
	82	volatile unsigned short *memreg = &gp2x_memregs[0x295A>>1];
	83
	84	gp2x_memregs[0x2958>>1] = 0;
	85
	86	len *= 2;
	87	while (len--)
	88	memreg = g++;
	89	}
	90
fa8d1331	91	static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H)
d572cbad	92	{
	93	float escalaw, escalah;
	94	int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;
	95	unsigned short scalw;
	96
	97	// set offset
	98	gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp;
	99	gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp;
	100	gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp;
	101	gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp;
	102
	103	escalaw = 1024.0; // RGB Horiz LCD
	104	escalah = 320.0; // RGB Vert LCD
	105
fa8d1331	106	if (gp2x_memregs[0x2800>>1]&0x100) //TV-Out
d572cbad	107	{
	108	escalaw=489.0; // RGB Horiz TV (PAL, NTSC)
	109	if (gp2x_memregs[0x2818>>1] == 287) //PAL
	110	escalah=274.0; // RGB Vert TV PAL
	111	else if (gp2x_memregs[0x2818>>1] == 239) //NTSC
	112	escalah=331.0; // RGB Vert TV NTSC
	113	}
	114
	115	// scale horizontal
	116	scalw = (unsigned short)((float)escalaw *(W/320.0));
fa8d1331	117	/* if there is no horizontal scaling, vertical doesn't work.
fa8d1331	118	* Here is a nasty wrokaround... */
d572cbad	119	if (H != 240 && W == 320) scalw--;
	120	gp2x_memregs[0x2906>>1]=scalw;
	121	// scale vertical
	122	gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah bpp (H/240.0));
	123	}
	124
fa8d1331	125	static void gp2x_video_wait_vsync_(void)
d572cbad	126	{
	127	unsigned short v = gp2x_memregs[0x1182>>1];
	128	while (!((v ^ gp2x_memregs[0x1182>>1]) & 0x10))
	129	spend_cycles(1024);
	130	}
	131
	132	/* 940 */
	133	void pause940(int yes)
	134	{
	135	if (yes)
	136	gp2x_memregs[0x0904>>1] &= 0xFFFE;
	137	else
	138	gp2x_memregs[0x0904>>1] \|= 1;
	139	}
	140
	141	void reset940(int yes, int bank)
	142	{
	143	gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) \| (bank & 0x03);
	144	}
	145
fa5e045b	146	/*
	147	* CPU clock
	148	* Fout = (m * Fin) / (p * 2^s)
	149	* m = MDIV+8, p = PDIV+2, s = SDIV
	150	*
	151	* m = (Fout * p * 2^s) / Fin
	152	*/
	153
	154	#define SYS_CLK_FREQ 7372800
	155
fa8d1331	156	static void gp2x_set_cpuclk_(unsigned int mhz)
fa5e045b	157	{
	158	unsigned int mdiv, pdiv, sdiv = 0;
	159	unsigned int v;
	160	int i;
	161
	162	pdiv = 3;
	163	mdiv = (mhz * pdiv * 1000000) / SYS_CLK_FREQ;
	164	if (mdiv & ~0xff) {
	165	fprintf(stderr, "invalid cpuclk MHz: %u\n", mhz);
	166	return;
	167	}
	168	v = ((mdiv-8)<<8) \| ((pdiv-2)<<2) \| sdiv;
	169	gp2x_memregs[0x910>>1] = v;
	170
	171	for (i = 0; i < 10000; i++)
	172	if (!(gp2x_memregs[0x902>>1] & 1))
	173	break;
71769e27	174
71769e27	175	cpuclk_was_changed = 1;
fa5e045b	176	}
	177
	178	/* RAM timings */
fa5e045b	179	#define TIMING_CHECK(t, adj, mask) \
	180	t += adj; \
	181	if (t & ~mask) \
	182	goto bad
	183
fa8d1331	184	static void set_ram_timing_vals(int tCAS, int tRC, int tRAS, int tWR, int tMRD, int tRFC, int tRP, int tRCD)
fa5e045b	185	{
	186	int i;
	187	TIMING_CHECK(tCAS, -2, 0x1);
	188	TIMING_CHECK(tRC, -1, 0xf);
	189	TIMING_CHECK(tRAS, -1, 0xf);
	190	TIMING_CHECK(tWR, -1, 0xf);
	191	TIMING_CHECK(tMRD, -1, 0xf);
	192	TIMING_CHECK(tRFC, -1, 0xf);
	193	TIMING_CHECK(tRP, -1, 0xf);
	194	TIMING_CHECK(tRCD, -1, 0xf);
	195
	196	/* get spend_cycles() into cache */
	197	spend_cycles(1);
	198
	199	gp2x_memregs[0x3802>>1] = ((tMRD & 0xF) << 12) \| ((tRFC & 0xF) << 8) \| ((tRP & 0xF) << 4) \| (tRCD & 0xF);
	200	gp2x_memregs[0x3804>>1] = 0x8000 \| ((tCAS & 1) << 12) \| ((tRC & 0xF) << 8) \| ((tRAS & 0xF) << 4) \| (tWR & 0xF);
	201
	202	/* be sure we don't access the mem while it's being reprogrammed */
	203	spend_cycles(128*1024);
	204	for (i = 0; i < 8*1024; i++)
	205	if (!(gp2x_memregs[0x3804>>1] & 0x8000))
	206	break;
	207
	208	printf("RAM timings set.\n");
	209	return;
	210	bad:
	211	fprintf(stderr, "RAM timings invalid.\n");
	212	}
	213
fa8d1331	214	static void set_ram_timings_(void)
	215	{
	216	/* craigix: --cas 2 --trc 6 --tras 4 --twr 1 --tmrd 1 --trfc 1 --trp 2 --trcd 2 */
	217	set_ram_timing_vals(2, 6, 4, 1, 1, 1, 2, 2);
	218	}
	219
	220	static void unset_ram_timings_(void)
fa5e045b	221	{
71769e27	222	gp2x_memregs[0x3802>>1] = memtimex_old[0];
71769e27	223	gp2x_memregs[0x3804>>1] = memtimex_old[1] \| 0x8000;
fa5e045b	224	printf("RAM timings reset to startup values.\n");
	225	}
	226
	227	/* LCD refresh */
	228	typedef struct
	229	{
	230	unsigned short reg, valmask, val;
	231	}
	232	reg_setting;
	233
	234	/* 120.00 97/0/2/7\|25/ 7/ 7/11/37 */
	235	static const reg_setting lcd_rate_120[] =
	236	{
	237	{ 0x0914, 0xffff, (97<<8)\|(0<<2)\|2 }, /* UPLLSETVREG */
	238	{ 0x0924, 0xff00, (2<<14)\|(7<<8) }, /* DISPCSETREG */
	239	{ 0x281A, 0x00ff, 25 }, /* .HSWID(T2) */
	240	{ 0x281C, 0x00ff, 7 }, /* .HSSTR(T8) */
	241	{ 0x281E, 0x00ff, 7 }, /* .HSEND(T7) */
	242	{ 0x2822, 0x01ff, 11 }, /* .VSEND (T9) */
	243	{ 0x2826, 0x0ff0, 37<<4 }, /* .DESTR(T3) */
	244	{ 0, 0, 0 }
	245	};
	246
	247	/* 100.00 96/0/2/7\|29/25/53/15/37 */
	248	static const reg_setting lcd_rate_100[] =
	249	{
	250	{ 0x0914, 0xffff, (96<<8)\|(0<<2)\|2 }, /* UPLLSETVREG */
	251	{ 0x0924, 0xff00, (2<<14)\|(7<<8) }, /* DISPCSETREG */
	252	{ 0x281A, 0x00ff, 29 }, /* .HSWID(T2) */
	253	{ 0x281C, 0x00ff, 25 }, /* .HSSTR(T8) */
	254	{ 0x281E, 0x00ff, 53 }, /* .HSEND(T7) */
	255	{ 0x2822, 0x01ff, 15 }, /* .VSEND (T9) */
	256	{ 0x2826, 0x0ff0, 37<<4 }, /* .DESTR(T3) */
	257	{ 0, 0, 0 }
	258	};
	259
	260	static reg_setting lcd_rate_defaults[] =
	261	{
	262	{ 0x0914, 0xffff, 0 },
	263	{ 0x0924, 0xff00, 0 },
	264	{ 0x281A, 0x00ff, 0 },
	265	{ 0x281C, 0x00ff, 0 },
	266	{ 0x281E, 0x00ff, 0 },
	267	{ 0x2822, 0x01ff, 0 },
	268	{ 0x2826, 0x0ff0, 0 },
	269	{ 0, 0, 0 }
	270	};
	271
	272	static void get_reg_setting(reg_setting *set)
	273	{
	274	for (; set->reg; set++)
	275	{
	276	unsigned short val = gp2x_memregs[set->reg >> 1];
	277	val &= set->valmask;
	278	set->val = val;
	279	}
	280	}
	281
	282	static void set_reg_setting(const reg_setting *set)
	283	{
	284	for (; set->reg; set++)
	285	{
	286	unsigned short val = gp2x_memregs[set->reg >> 1];
	287	val &= ~set->valmask;
288	val \|= set->val;
289	gp2x_memregs[set->reg >> 1] = val;
290	}
291	}
292
fa8d1331	293	static void set_lcd_custom_rate_(int is_pal)
fa5e045b	294	{
	295	if (gp2x_memregs[0x2800>>1] & 0x100) // tv-out
	296	return;
	297
	298	printf("setting custom LCD refresh (%d Hz)... ", is_pal ? 100 : 120);
	299	fflush(stdout);
	300
	301	set_reg_setting(is_pal ? lcd_rate_100 : lcd_rate_120);
	302	printf("done.\n");
	303	}
	304
fa8d1331	305	static void unset_lcd_custom_rate_(void)
fa5e045b	306	{
	307	printf("reset to prev LCD refresh.\n");
	308	set_reg_setting(lcd_rate_defaults);
	309	}
	310
fa8d1331	311	static void set_lcd_gamma_(int g100, int A_SNs_curve)
fa5e045b	312	{
	313	float gamma = (float) g100 / 100;
	314	int i;
	315	gamma = 1 / gamma;
	316
	317	/* enable gamma */
	318	gp2x_memregs[0x2880>>1] &= ~(1<<12);
	319
	320	gp2x_memregs[0x295C>>1] = 0;
	321	for (i = 0; i < 256; i++)
	322	{
	323	unsigned char g;
	324	unsigned short s;
	325	const unsigned short grey50=143, grey75=177, grey25=97;
	326	double blah;
	327
	328	if (A_SNs_curve)
	329	{
	330	// The next formula is all about gaussian interpolation
	331	blah = (( -128 * exp(-powf((float) i/64.0f + 2.0f , 2.0f))) +
	332	( -64 * exp(-powf((float) i/64.0f + 1.0f , 2.0f))) +
	333	(grey25 * exp(-powf((float) i/64.0f - 1.0f , 2.0f))) +
	334	(grey50 * exp(-powf((float) i/64.0f - 2.0f , 2.0f))) +
	335	(grey75 * exp(-powf((float) i/64.0f - 3.0f , 2.0f))) +
	336	( 256 * exp(-powf((float) i/64.0f - 4.0f , 2.0f))) +
	337	( 320 * exp(-powf((float) i/64.0f - 5.0f , 2.0f))) +
	338	( 384 * exp(-powf((float) i/64.0f - 6.0f , 2.0f)))) / 1.772637;
	339	blah += 0.5;
	340	}
	341	else
	342	{
	343	blah = i;
	344	}
	345
	346	g = (unsigned char)(255.0 * pow(blah/255.0, gamma));
	347	//printf("%d : %d\n", i, g);
	348	s = (g<<8) \| g;
	349	gp2x_memregs[0x295E>>1]= s;
	350	gp2x_memregs[0x295E>>1]= g;
	351	}
71769e27	352
71769e27	353	gamma_was_changed = 1;
fa5e045b	354	}
fa5e045b	355
053bef76	356	static int gp2x_read_battery_(void)
	357	{
	358	return -1; /* TODO? */
	359	}
d572cbad	360
	361	/* these are not quite MMSP2 related,
	362	* more to GP2X F100/F200 consoles themselves. */
	363	typedef struct ucb1x00_ts_event
	364	{
	365	unsigned short pressure;
	366	unsigned short x;
	367	unsigned short y;
	368	unsigned short pad;
	369	struct timeval stamp;
	370	} UCB1X00_TS_EVENT;
	371
	372	int gp2x_touchpad_read(int x, int y)
	373	{
	374	UCB1X00_TS_EVENT event;
	375	static int zero_seen = 0;
	376	int retval;
	377
	378	if (touchdev < 0) return -1;
	379
	380	retval = read(touchdev, &event, sizeof(event));
	381	if (retval <= 0) {
	382	perror("touch read failed");
	383	return -1;
	384	}
	385	// this is to ignore the messed-up 4.1.x driver
	386	if (event.pressure == 0) zero_seen = 1;
	387
	388	if (x) x = (event.x touchcal[0] + touchcal[2]) >> 16;
	389	if (y) y = (event.y touchcal[4] + touchcal[5]) >> 16;
	390	// printf("read %i %i %i\n", event.pressure, x, y);
	391
	392	return zero_seen ? event.pressure : 0;
	393	}
	394
	395	static void proc_set(const char path, const char val)
	396	{
	397	FILE *f;
	398	char tmp[16];
	399
	400	f = fopen(path, "w");
	401	if (f == NULL) {
	402	printf("failed to open: %s\n", path);
	403	return;
	404	}
	405
	406	fprintf(f, "0\n");
	407	fclose(f);
	408
	409	printf("\"%s\" is set to: ", path);
	410	f = fopen(path, "r");
	411	if (f == NULL) {
	412	printf("(open failed)\n");
	413	return;
	414	}
	415
	416	fgets(tmp, sizeof(tmp), f);
	417	printf("%s", tmp);
	418	fclose(f);
	419	}
	420
	421
	422	void mmsp2_init(void)
	423	{
424	int i;
425
426	memdev = open("/dev/mem", O_RDWR);
427	if (memdev == -1)
428	{
429	perror("open(\"/dev/mem\")");
430	exit(1);
431	}
432
433	gp2x_memregs = mmap(0, 0x10000, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);
434	if (gp2x_memregs == MAP_FAILED)
435	{
436	perror("mmap(memregs)");
437	exit(1);
438	}
439	gp2x_memregl = (unsigned long *) gp2x_memregs;
440
441	gp2x_memregs[0x2880>>1] &= ~0x383; // disable cursor, subpict, osd, video layers
442
443	gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED,
444	memdev, gp2x_screenaddrs[0]);
445	if (gp2x_screens[0] == MAP_FAILED)
446	{
447	perror("mmap(g_screen_ptr)");
448	exit(1);
449	}
450	printf("framebuffers:\n");
451	printf(" %08x -> %p\n", gp2x_screenaddrs[0], gp2x_screens[0]);
452	for (i = 1; i < 4; i++)
453	{
454	gp2x_screens[i] = (char *) gp2x_screens[i - 1] + FRAMEBUFF_SIZE;
455	printf(" %08x -> %p\n", gp2x_screenaddrs[i], gp2x_screens[i]);
456	}
457
458	g_screen_ptr = gp2x_screens[0];
459	screensel = 0;
460
461	gp2x_screenaddr_old[0] = gp2x_memregs[0x290E>>1];
462	gp2x_screenaddr_old[1] = gp2x_memregs[0x2910>>1];
463	gp2x_screenaddr_old[2] = gp2x_memregs[0x2912>>1];
464	gp2x_screenaddr_old[3] = gp2x_memregs[0x2914>>1];
465
466	memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));
467
71769e27	468	/* save startup values: LCD refresh */
fa5e045b	469	get_reg_setting(lcd_rate_defaults);
fa5e045b	470
71769e27	471	/* CPU and RAM timings */
	472	reg0910 = gp2x_memregs[0x0910>>1];
	473	memtimex_old[0] = gp2x_memregs[0x3802>>1];
	474	memtimex_old[1] = gp2x_memregs[0x3804>>1];
fa5e045b	475
fa5e045b	476	/* touchscreen */
d572cbad	477	touchdev = open("/dev/touchscreen/wm97xx", O_RDONLY);
	478	if (touchdev >= 0) {
	479	FILE *pcf = fopen("/etc/pointercal", "r");
	480	if (pcf) {
	481	fscanf(pcf, "%d %d %d %d %d %d %d", &touchcal[0], &touchcal[1],
	482	&touchcal[2], &touchcal[3], &touchcal[4], &touchcal[5], &touchcal[6]);
	483	fclose(pcf);
	484	}
	485	printf("found touchscreen/wm97xx\n");
	486	}
	487
	488	/* disable Linux read-ahead */
	489	proc_set("/proc/sys/vm/max-readahead", "0\n");
	490	proc_set("/proc/sys/vm/min-readahead", "0\n");
fa5e045b	491
	492	/* code940 portion */
	493	sharedmem940_init();
fa8d1331	494
	495	gp2x_video_flip = gp2x_video_flip_;
	496	gp2x_video_flip2 = gp2x_video_flip2_;
	497	gp2x_video_changemode_ll = gp2x_video_changemode_ll_;
	498	gp2x_video_setpalette = gp2x_video_setpalette_;
	499	gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_;
	500	gp2x_video_wait_vsync = gp2x_video_wait_vsync_;
	501
	502	gp2x_set_cpuclk = gp2x_set_cpuclk_;
	503
	504	set_lcd_custom_rate = set_lcd_custom_rate_;
	505	unset_lcd_custom_rate = unset_lcd_custom_rate_;
	506	set_lcd_gamma = set_lcd_gamma_;
	507
	508	set_ram_timings = set_ram_timings_;
	509	unset_ram_timings = unset_ram_timings_;
053bef76	510	gp2x_read_battery = gp2x_read_battery_;
b5bfb864	511
1eb704b6	512	gp2x_get_ticks_ms = plat_get_ticks_ms_good;
1eb704b6	513	gp2x_get_ticks_us = plat_get_ticks_us_good;
d572cbad	514	}
	515
	516	void mmsp2_finish(void)
	517	{
	518	reset940(1, 3);
	519	pause940(1);
fa5e045b	520	sharedmem940_finish();
d572cbad	521
71769e27	522	gp2x_video_RGB_setscaling_(0, 320, 240);
	523	gp2x_video_changemode_ll_(16);
	524
d572cbad	525	gp2x_memregs[0x290E>>1] = gp2x_screenaddr_old[0];
	526	gp2x_memregs[0x2910>>1] = gp2x_screenaddr_old[1];
	527	gp2x_memregs[0x2912>>1] = gp2x_screenaddr_old[2];
	528	gp2x_memregs[0x2914>>1] = gp2x_screenaddr_old[3];
	529
fa8d1331	530	unset_lcd_custom_rate_();
71769e27	531	if (gamma_was_changed)
	532	set_lcd_gamma_(100, 0);
	533	unset_ram_timings_();
	534	if (cpuclk_was_changed)
	535	gp2x_memregs[0x910>>1] = reg0910;
fa5e045b	536
d572cbad	537	munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);
	538	munmap((void *)gp2x_memregs, 0x10000);
	539	close(memdev);
	540	if (touchdev >= 0)
	541	close(touchdev);
	542	}
	543