[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/plat.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 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;

extern unsigned int plat_get_ticks_ms_gtod(void);
extern unsigned int plat_get_ticks_us_gtod(void);

/* 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_gtod;
	gp2x_get_ticks_us = plat_get_ticks_us_gtod;
}

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"
d572cbad	14	#include "../common/emu.h"
b5bfb864	15	#include "../common/plat.h"
d572cbad	16	#include "../common/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
b5bfb864	44	extern unsigned int plat_get_ticks_ms_gtod(void);
b5bfb864	45	extern unsigned int plat_get_ticks_us_gtod(void);
d572cbad	46
d572cbad	47	/* video stuff */
fa8d1331	48	static void gp2x_video_flip_(void)
d572cbad	49	{
	50	unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3];
	51	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16);
	52
	53	gp2x_memregs[0x2910>>1] = msw;
	54	gp2x_memregs[0x2914>>1] = msw;
	55	gp2x_memregs[0x290E>>1] = lsw;
	56	gp2x_memregs[0x2912>>1] = lsw;
	57
	58	// jump to other buffer:
	59	g_screen_ptr = gp2x_screens[++screensel&3];
	60	}
	61
	62	/* doulblebuffered flip */
fa8d1331	63	static void gp2x_video_flip2_(void)
d572cbad	64	{
	65	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16);
	66
	67	gp2x_memregs[0x2910>>1] = msw;
	68	gp2x_memregs[0x2914>>1] = msw;
	69	gp2x_memregs[0x290E>>1] = 0;
	70	gp2x_memregs[0x2912>>1] = 0;
	71
	72	// jump to other buffer:
	73	g_screen_ptr = gp2x_screens[++screensel&1];
	74	}
	75
fa8d1331	76	static void gp2x_video_changemode_ll_(int bpp)
d572cbad	77	{
	78	gp2x_memregs[0x28DA>>1] = (((bpp+1)/8)<<9)\|0xAB; /8/15/16/24bpp.../
	79	gp2x_memregs[0x290C>>1] = 320((bpp+1)/8); /line width in bytes*/
	80	}
	81
fa8d1331	82	static void gp2x_video_setpalette_(int *pal, int len)
d572cbad	83	{
	84	unsigned short g = (unsigned short )pal;
	85	volatile unsigned short *memreg = &gp2x_memregs[0x295A>>1];
	86
	87	gp2x_memregs[0x2958>>1] = 0;
	88
	89	len *= 2;
	90	while (len--)
	91	memreg = g++;
	92	}
	93
fa8d1331	94	static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H)
d572cbad	95	{
	96	float escalaw, escalah;
	97	int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;
	98	unsigned short scalw;
	99
	100	// set offset
	101	gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp;
	102	gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp;
	103	gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp;
	104	gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp;
	105
	106	escalaw = 1024.0; // RGB Horiz LCD
	107	escalah = 320.0; // RGB Vert LCD
	108
fa8d1331	109	if (gp2x_memregs[0x2800>>1]&0x100) //TV-Out
d572cbad	110	{
	111	escalaw=489.0; // RGB Horiz TV (PAL, NTSC)
	112	if (gp2x_memregs[0x2818>>1] == 287) //PAL
	113	escalah=274.0; // RGB Vert TV PAL
	114	else if (gp2x_memregs[0x2818>>1] == 239) //NTSC
	115	escalah=331.0; // RGB Vert TV NTSC
	116	}
	117
	118	// scale horizontal
	119	scalw = (unsigned short)((float)escalaw *(W/320.0));
fa8d1331	120	/* if there is no horizontal scaling, vertical doesn't work.
fa8d1331	121	* Here is a nasty wrokaround... */
d572cbad	122	if (H != 240 && W == 320) scalw--;
	123	gp2x_memregs[0x2906>>1]=scalw;
	124	// scale vertical
	125	gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah bpp (H/240.0));
	126	}
	127
fa8d1331	128	static void gp2x_video_wait_vsync_(void)
d572cbad	129	{
	130	unsigned short v = gp2x_memregs[0x1182>>1];
	131	while (!((v ^ gp2x_memregs[0x1182>>1]) & 0x10))
	132	spend_cycles(1024);
	133	}
	134
	135	/* 940 */
	136	void pause940(int yes)
	137	{
	138	if (yes)
	139	gp2x_memregs[0x0904>>1] &= 0xFFFE;
	140	else
	141	gp2x_memregs[0x0904>>1] \|= 1;
	142	}
	143
	144	void reset940(int yes, int bank)
	145	{
	146	gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) \| (bank & 0x03);
	147	}
	148
fa5e045b	149	/*
	150	* CPU clock
	151	* Fout = (m * Fin) / (p * 2^s)
	152	* m = MDIV+8, p = PDIV+2, s = SDIV
	153	*
	154	* m = (Fout * p * 2^s) / Fin
	155	*/
	156
	157	#define SYS_CLK_FREQ 7372800
	158
fa8d1331	159	static void gp2x_set_cpuclk_(unsigned int mhz)
fa5e045b	160	{
	161	unsigned int mdiv, pdiv, sdiv = 0;
	162	unsigned int v;
	163	int i;
	164
	165	pdiv = 3;
	166	mdiv = (mhz * pdiv * 1000000) / SYS_CLK_FREQ;
	167	if (mdiv & ~0xff) {
	168	fprintf(stderr, "invalid cpuclk MHz: %u\n", mhz);
	169	return;
	170	}
	171	v = ((mdiv-8)<<8) \| ((pdiv-2)<<2) \| sdiv;
	172	gp2x_memregs[0x910>>1] = v;
	173
	174	for (i = 0; i < 10000; i++)
	175	if (!(gp2x_memregs[0x902>>1] & 1))
	176	break;
71769e27	177
71769e27	178	cpuclk_was_changed = 1;
fa5e045b	179	}
	180
	181	/* RAM timings */
fa5e045b	182	#define TIMING_CHECK(t, adj, mask) \
	183	t += adj; \
	184	if (t & ~mask) \
	185	goto bad
	186
fa8d1331	187	static void set_ram_timing_vals(int tCAS, int tRC, int tRAS, int tWR, int tMRD, int tRFC, int tRP, int tRCD)
fa5e045b	188	{
	189	int i;
	190	TIMING_CHECK(tCAS, -2, 0x1);
	191	TIMING_CHECK(tRC, -1, 0xf);
	192	TIMING_CHECK(tRAS, -1, 0xf);
	193	TIMING_CHECK(tWR, -1, 0xf);
	194	TIMING_CHECK(tMRD, -1, 0xf);
	195	TIMING_CHECK(tRFC, -1, 0xf);
	196	TIMING_CHECK(tRP, -1, 0xf);
	197	TIMING_CHECK(tRCD, -1, 0xf);
	198
	199	/* get spend_cycles() into cache */
	200	spend_cycles(1);
	201
	202	gp2x_memregs[0x3802>>1] = ((tMRD & 0xF) << 12) \| ((tRFC & 0xF) << 8) \| ((tRP & 0xF) << 4) \| (tRCD & 0xF);
	203	gp2x_memregs[0x3804>>1] = 0x8000 \| ((tCAS & 1) << 12) \| ((tRC & 0xF) << 8) \| ((tRAS & 0xF) << 4) \| (tWR & 0xF);
	204
	205	/* be sure we don't access the mem while it's being reprogrammed */
	206	spend_cycles(128*1024);
	207	for (i = 0; i < 8*1024; i++)
	208	if (!(gp2x_memregs[0x3804>>1] & 0x8000))
	209	break;
	210
	211	printf("RAM timings set.\n");
	212	return;
	213	bad:
	214	fprintf(stderr, "RAM timings invalid.\n");
	215	}
	216
fa8d1331	217	static void set_ram_timings_(void)
	218	{
	219	/* craigix: --cas 2 --trc 6 --tras 4 --twr 1 --tmrd 1 --trfc 1 --trp 2 --trcd 2 */
	220	set_ram_timing_vals(2, 6, 4, 1, 1, 1, 2, 2);
	221	}
	222
	223	static void unset_ram_timings_(void)
fa5e045b	224	{
71769e27	225	gp2x_memregs[0x3802>>1] = memtimex_old[0];
71769e27	226	gp2x_memregs[0x3804>>1] = memtimex_old[1] \| 0x8000;
fa5e045b	227	printf("RAM timings reset to startup values.\n");
	228	}
	229
	230	/* LCD refresh */
	231	typedef struct
	232	{
	233	unsigned short reg, valmask, val;
	234	}
	235	reg_setting;
	236
	237	/* 120.00 97/0/2/7\|25/ 7/ 7/11/37 */
	238	static const reg_setting lcd_rate_120[] =
	239	{
	240	{ 0x0914, 0xffff, (97<<8)\|(0<<2)\|2 }, /* UPLLSETVREG */
	241	{ 0x0924, 0xff00, (2<<14)\|(7<<8) }, /* DISPCSETREG */
	242	{ 0x281A, 0x00ff, 25 }, /* .HSWID(T2) */
	243	{ 0x281C, 0x00ff, 7 }, /* .HSSTR(T8) */
	244	{ 0x281E, 0x00ff, 7 }, /* .HSEND(T7) */
	245	{ 0x2822, 0x01ff, 11 }, /* .VSEND (T9) */
	246	{ 0x2826, 0x0ff0, 37<<4 }, /* .DESTR(T3) */
	247	{ 0, 0, 0 }
	248	};
	249
	250	/* 100.00 96/0/2/7\|29/25/53/15/37 */
	251	static const reg_setting lcd_rate_100[] =
	252	{
	253	{ 0x0914, 0xffff, (96<<8)\|(0<<2)\|2 }, /* UPLLSETVREG */
	254	{ 0x0924, 0xff00, (2<<14)\|(7<<8) }, /* DISPCSETREG */
	255	{ 0x281A, 0x00ff, 29 }, /* .HSWID(T2) */
	256	{ 0x281C, 0x00ff, 25 }, /* .HSSTR(T8) */
	257	{ 0x281E, 0x00ff, 53 }, /* .HSEND(T7) */
	258	{ 0x2822, 0x01ff, 15 }, /* .VSEND (T9) */
	259	{ 0x2826, 0x0ff0, 37<<4 }, /* .DESTR(T3) */
	260	{ 0, 0, 0 }
	261	};
	262
	263	static reg_setting lcd_rate_defaults[] =
	264	{
	265	{ 0x0914, 0xffff, 0 },
	266	{ 0x0924, 0xff00, 0 },
	267	{ 0x281A, 0x00ff, 0 },
	268	{ 0x281C, 0x00ff, 0 },
	269	{ 0x281E, 0x00ff, 0 },
	270	{ 0x2822, 0x01ff, 0 },
	271	{ 0x2826, 0x0ff0, 0 },
	272	{ 0, 0, 0 }
	273	};
	274
	275	static void get_reg_setting(reg_setting *set)
	276	{
	277	for (; set->reg; set++)
	278	{
	279	unsigned short val = gp2x_memregs[set->reg >> 1];
	280	val &= set->valmask;
	281	set->val = val;
	282	}
	283	}
	284
	285	static void set_reg_setting(const reg_setting *set)
	286	{
	287	for (; set->reg; set++)
	288	{
	289	unsigned short val = gp2x_memregs[set->reg >> 1];
	290	val &= ~set->valmask;
291	val \|= set->val;
292	gp2x_memregs[set->reg >> 1] = val;
293	}
294	}
295
fa8d1331	296	static void set_lcd_custom_rate_(int is_pal)
fa5e045b	297	{
	298	if (gp2x_memregs[0x2800>>1] & 0x100) // tv-out
	299	return;
	300
	301	printf("setting custom LCD refresh (%d Hz)... ", is_pal ? 100 : 120);
	302	fflush(stdout);
	303
	304	set_reg_setting(is_pal ? lcd_rate_100 : lcd_rate_120);
	305	printf("done.\n");
	306	}
	307
fa8d1331	308	static void unset_lcd_custom_rate_(void)
fa5e045b	309	{
	310	printf("reset to prev LCD refresh.\n");
	311	set_reg_setting(lcd_rate_defaults);
	312	}
	313
fa8d1331	314	static void set_lcd_gamma_(int g100, int A_SNs_curve)
fa5e045b	315	{
	316	float gamma = (float) g100 / 100;
	317	int i;
	318	gamma = 1 / gamma;
	319
	320	/* enable gamma */
	321	gp2x_memregs[0x2880>>1] &= ~(1<<12);
	322
	323	gp2x_memregs[0x295C>>1] = 0;
	324	for (i = 0; i < 256; i++)
	325	{
	326	unsigned char g;
	327	unsigned short s;
	328	const unsigned short grey50=143, grey75=177, grey25=97;
	329	double blah;
	330
	331	if (A_SNs_curve)
	332	{
	333	// The next formula is all about gaussian interpolation
	334	blah = (( -128 * exp(-powf((float) i/64.0f + 2.0f , 2.0f))) +
	335	( -64 * exp(-powf((float) i/64.0f + 1.0f , 2.0f))) +
	336	(grey25 * exp(-powf((float) i/64.0f - 1.0f , 2.0f))) +
	337	(grey50 * exp(-powf((float) i/64.0f - 2.0f , 2.0f))) +
	338	(grey75 * exp(-powf((float) i/64.0f - 3.0f , 2.0f))) +
	339	( 256 * exp(-powf((float) i/64.0f - 4.0f , 2.0f))) +
	340	( 320 * exp(-powf((float) i/64.0f - 5.0f , 2.0f))) +
	341	( 384 * exp(-powf((float) i/64.0f - 6.0f , 2.0f)))) / 1.772637;
	342	blah += 0.5;
	343	}
	344	else
	345	{
	346	blah = i;
	347	}
	348
	349	g = (unsigned char)(255.0 * pow(blah/255.0, gamma));
	350	//printf("%d : %d\n", i, g);
	351	s = (g<<8) \| g;
	352	gp2x_memregs[0x295E>>1]= s;
	353	gp2x_memregs[0x295E>>1]= g;
	354	}
71769e27	355
71769e27	356	gamma_was_changed = 1;
fa5e045b	357	}
fa5e045b	358
053bef76	359	static int gp2x_read_battery_(void)
	360	{
	361	return -1; /* TODO? */
	362	}
d572cbad	363
	364	/* these are not quite MMSP2 related,
	365	* more to GP2X F100/F200 consoles themselves. */
	366	typedef struct ucb1x00_ts_event
	367	{
	368	unsigned short pressure;
	369	unsigned short x;
	370	unsigned short y;
	371	unsigned short pad;
	372	struct timeval stamp;
	373	} UCB1X00_TS_EVENT;
	374
	375	int gp2x_touchpad_read(int x, int y)
	376	{
	377	UCB1X00_TS_EVENT event;
	378	static int zero_seen = 0;
	379	int retval;
	380
	381	if (touchdev < 0) return -1;
	382
	383	retval = read(touchdev, &event, sizeof(event));
	384	if (retval <= 0) {
	385	perror("touch read failed");
	386	return -1;
	387	}
	388	// this is to ignore the messed-up 4.1.x driver
	389	if (event.pressure == 0) zero_seen = 1;
	390
	391	if (x) x = (event.x touchcal[0] + touchcal[2]) >> 16;
	392	if (y) y = (event.y touchcal[4] + touchcal[5]) >> 16;
	393	// printf("read %i %i %i\n", event.pressure, x, y);
	394
	395	return zero_seen ? event.pressure : 0;
	396	}
	397
	398	static void proc_set(const char path, const char val)
	399	{
	400	FILE *f;
	401	char tmp[16];
	402
	403	f = fopen(path, "w");
	404	if (f == NULL) {
	405	printf("failed to open: %s\n", path);
	406	return;
	407	}
	408
	409	fprintf(f, "0\n");
	410	fclose(f);
	411
	412	printf("\"%s\" is set to: ", path);
	413	f = fopen(path, "r");
	414	if (f == NULL) {
	415	printf("(open failed)\n");
	416	return;
	417	}
	418
	419	fgets(tmp, sizeof(tmp), f);
	420	printf("%s", tmp);
	421	fclose(f);
	422	}
	423
	424
	425	void mmsp2_init(void)
	426	{
427	int i;
428
429	memdev = open("/dev/mem", O_RDWR);
430	if (memdev == -1)
431	{
432	perror("open(\"/dev/mem\")");
433	exit(1);
434	}
435
436	gp2x_memregs = mmap(0, 0x10000, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);
437	if (gp2x_memregs == MAP_FAILED)
438	{
439	perror("mmap(memregs)");
440	exit(1);
441	}
442	gp2x_memregl = (unsigned long *) gp2x_memregs;
443
444	gp2x_memregs[0x2880>>1] &= ~0x383; // disable cursor, subpict, osd, video layers
445
446	gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED,
447	memdev, gp2x_screenaddrs[0]);
448	if (gp2x_screens[0] == MAP_FAILED)
449	{
450	perror("mmap(g_screen_ptr)");
451	exit(1);
452	}
453	printf("framebuffers:\n");
454	printf(" %08x -> %p\n", gp2x_screenaddrs[0], gp2x_screens[0]);
455	for (i = 1; i < 4; i++)
456	{
457	gp2x_screens[i] = (char *) gp2x_screens[i - 1] + FRAMEBUFF_SIZE;
458	printf(" %08x -> %p\n", gp2x_screenaddrs[i], gp2x_screens[i]);
459	}
460
461	g_screen_ptr = gp2x_screens[0];
462	screensel = 0;
463
464	gp2x_screenaddr_old[0] = gp2x_memregs[0x290E>>1];
465	gp2x_screenaddr_old[1] = gp2x_memregs[0x2910>>1];
466	gp2x_screenaddr_old[2] = gp2x_memregs[0x2912>>1];
467	gp2x_screenaddr_old[3] = gp2x_memregs[0x2914>>1];
468
469	memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));
470
71769e27	471	/* save startup values: LCD refresh */
fa5e045b	472	get_reg_setting(lcd_rate_defaults);
fa5e045b	473
71769e27	474	/* CPU and RAM timings */
	475	reg0910 = gp2x_memregs[0x0910>>1];
	476	memtimex_old[0] = gp2x_memregs[0x3802>>1];
	477	memtimex_old[1] = gp2x_memregs[0x3804>>1];
fa5e045b	478
fa5e045b	479	/* touchscreen */
d572cbad	480	touchdev = open("/dev/touchscreen/wm97xx", O_RDONLY);
	481	if (touchdev >= 0) {
	482	FILE *pcf = fopen("/etc/pointercal", "r");
	483	if (pcf) {
	484	fscanf(pcf, "%d %d %d %d %d %d %d", &touchcal[0], &touchcal[1],
	485	&touchcal[2], &touchcal[3], &touchcal[4], &touchcal[5], &touchcal[6]);
	486	fclose(pcf);
	487	}
	488	printf("found touchscreen/wm97xx\n");
	489	}
	490
	491	/* disable Linux read-ahead */
	492	proc_set("/proc/sys/vm/max-readahead", "0\n");
	493	proc_set("/proc/sys/vm/min-readahead", "0\n");
fa5e045b	494
	495	/* code940 portion */
	496	sharedmem940_init();
fa8d1331	497
	498	gp2x_video_flip = gp2x_video_flip_;
	499	gp2x_video_flip2 = gp2x_video_flip2_;
	500	gp2x_video_changemode_ll = gp2x_video_changemode_ll_;
	501	gp2x_video_setpalette = gp2x_video_setpalette_;
	502	gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_;
	503	gp2x_video_wait_vsync = gp2x_video_wait_vsync_;
	504
	505	gp2x_set_cpuclk = gp2x_set_cpuclk_;
	506
	507	set_lcd_custom_rate = set_lcd_custom_rate_;
	508	unset_lcd_custom_rate = unset_lcd_custom_rate_;
	509	set_lcd_gamma = set_lcd_gamma_;
	510
	511	set_ram_timings = set_ram_timings_;
	512	unset_ram_timings = unset_ram_timings_;
053bef76	513	gp2x_read_battery = gp2x_read_battery_;
b5bfb864	514
	515	gp2x_get_ticks_ms = plat_get_ticks_ms_gtod;
	516	gp2x_get_ticks_us = plat_get_ticks_us_gtod;
d572cbad	517	}
	518
	519	void mmsp2_finish(void)
	520	{
	521	reset940(1, 3);
	522	pause940(1);
fa5e045b	523	sharedmem940_finish();
d572cbad	524
71769e27	525	gp2x_video_RGB_setscaling_(0, 320, 240);
	526	gp2x_video_changemode_ll_(16);
	527
d572cbad	528	gp2x_memregs[0x290E>>1] = gp2x_screenaddr_old[0];
	529	gp2x_memregs[0x2910>>1] = gp2x_screenaddr_old[1];
	530	gp2x_memregs[0x2912>>1] = gp2x_screenaddr_old[2];
	531	gp2x_memregs[0x2914>>1] = gp2x_screenaddr_old[3];
	532
fa8d1331	533	unset_lcd_custom_rate_();
71769e27	534	if (gamma_was_changed)
	535	set_lcd_gamma_(100, 0);
	536	unset_ram_timings_();
	537	if (cpuclk_was_changed)
	538	gp2x_memregs[0x910>>1] = reg0910;
fa5e045b	539
d572cbad	540	munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);
	541	munmap((void *)gp2x_memregs, 0x10000);
	542	close(memdev);
	543	if (touchdev >= 0)
	544	close(touchdev);
	545	}
	546