[picodrive.git] / platform / gp2x / soc_pollux.c

/*
 * <random_info=mem_map>
 * 00000000-029fffff linux (42MB)
 * 02a00000-02dfffff fb (4MB, 153600B really used)
 * 02e00000-02ffffff sound dma (2MB)
 * 03000000-03ffffff MPEGDEC (?, 16MB)
 * </random_info>
 */
#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 <sys/ioctl.h>
#include <linux/fb.h>

#include "soc.h"
#include "plat_gp2x.h"
#include "../common/emu.h"
#include "../common/arm_utils.h"
#include "pollux_set.h"

static volatile unsigned short *memregs;
static volatile unsigned long  *memregl;
static int memdev = -1;
static int battdev = -1;

extern void *gp2x_screens[4];

#define fb_buf_count 4
static unsigned int fb_paddr[fb_buf_count];
static int fb_work_buf;
static int fbdev = -1;

static char cpuclk_was_changed = 0;
static unsigned short memtimex_old[2];
static unsigned int pllsetreg0;
static int last_pal_setting = 0;


/* misc */
static void pollux_set_fromenv(const char *env_var)
{
	const char *set_string;
	set_string = getenv(env_var);
	if (set_string)
		pollux_set(memregs, set_string);
	else
		printf("env var %s not defined.\n", env_var);
}

/* video stuff */
static void pollux_video_flip(int buf_count)
{
	memregl[0x406C>>2] = fb_paddr[fb_work_buf];
	memregl[0x4058>>2] |= 0x10;
	fb_work_buf++;
	if (fb_work_buf >= buf_count)
		fb_work_buf = 0;
	g_screen_ptr = gp2x_screens[fb_work_buf];
}

static void gp2x_video_flip_(void)
{
	pollux_video_flip(fb_buf_count);
}

/* doulblebuffered flip */
static void gp2x_video_flip2_(void)
{
	pollux_video_flip(2);
}

static void gp2x_video_changemode_ll_(int bpp)
{
	static int prev_bpp = 0;
	int code = 0, bytes = 2;
	int rot_cmd[2] = { 0, 0 };
	unsigned int r;
	char buff[32];
	int ret;

	if (bpp == prev_bpp)
		return;
	prev_bpp = bpp;

	printf("changemode: %dbpp rot=%d\n", abs(bpp), bpp < 0);

	/* negative bpp means rotated mode */
	rot_cmd[0] = (bpp < 0) ? 6 : 5;
	ret = ioctl(fbdev, _IOW('D', 90, int[2]), rot_cmd);
	if (ret < 0)
		perror("rot ioctl failed");
	memregl[0x4004>>2] = (bpp < 0) ? 0x013f00ef : 0x00ef013f;
	memregl[0x4000>>2] |= 1 << 3;

	/* the above ioctl resets LCD timings, so set them here */
	snprintf(buff, sizeof(buff), "POLLUX_LCD_TIMINGS_%s", last_pal_setting ? "PAL" : "NTSC");
	pollux_set_fromenv(buff);

	switch (abs(bpp))
	{
		case 8:
			code = 0x443a;
			bytes = 1;
			break;

		case 15:
		case 16:
			code = 0x4432;
			bytes = 2;
			break;

		default:
			printf("unhandled bpp request: %d\n", abs(bpp));
			return;
	}

	memregl[0x405c>>2] = bytes;
	memregl[0x4060>>2] = bytes * (bpp < 0 ? 240 : 320);

	r = memregl[0x4058>>2];
	r = (r & 0xffff) | (code << 16) | 0x10;
	memregl[0x4058>>2] = r;
}

static void gp2x_video_setpalette_(int *pal, int len)
{
	/* pollux palette is 16bpp only.. */
	int i;
	for (i = 0; i < len; i++)
	{
		int c = pal[i];
		c = ((c >> 8) & 0xf800) | ((c >> 5) & 0x07c0) | ((c >> 3) & 0x001f);
		memregl[0x4070>>2] = (i << 24) | c;
	}
}

static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H)
{
	/* maybe a job for 3d hardware? */
}

static void gp2x_video_wait_vsync_(void)
{
	while (!(memregl[0x308c>>2] & (1 << 10)));
		spend_cycles(128);
	memregl[0x308c>>2] |= 1 << 10;
}

/* CPU clock */
static void gp2x_set_cpuclk_(unsigned int mhz)
{
	char buff[24];
	snprintf(buff, sizeof(buff), "cpuclk=%u", mhz);
	pollux_set(memregs, buff);

	cpuclk_was_changed = 1;
}

/* RAM timings */
static void set_ram_timings_(void)
{
	pollux_set_fromenv("POLLUX_RAM_TIMINGS");
}

static void unset_ram_timings_(void)
{
	int i;

	memregs[0x14802>>1] = memtimex_old[0];
	memregs[0x14804>>1] = memtimex_old[1] | 0x8000;

	for (i = 0; i < 0x100000; i++)
		if (!(memregs[0x14804>>1] & 0x8000))
			break;

	printf("RAM timings reset to startup values.\n");
}

/* LCD refresh */
static void set_lcd_custom_rate_(int is_pal)
{
	/* just remember PAL/NTSC. We always set timings in _changemode_ll() */
	last_pal_setting = is_pal;
}

static void unset_lcd_custom_rate_(void)
{
}

static void set_lcd_gamma_(int g100, int A_SNs_curve)
{
	/* hm, the LCD possibly can do it (but not POLLUX) */
}

static int gp2x_read_battery_(void)
{
	unsigned short magic_val = 0;

	if (battdev < 0)
		return -1;
	if (read(battdev, &magic_val, sizeof(magic_val)) != sizeof(magic_val))
		return -1;
	switch (magic_val) {
	default:
	case 1:	return 100;
	case 2: return 66;
	case 3: return 40;
	case 4: return 0;
	}
}

#define TIMER_BASE3 0x1980
#define TIMER_REG(x) memregl[(TIMER_BASE3 + x) >> 2]

unsigned int gp2x_get_ticks_us_(void)
{
	TIMER_REG(0x08) = 0x4b;  /* run timer, latch value */
	return TIMER_REG(0);
}

unsigned int gp2x_get_ticks_ms_(void)
{
	/* approximate /= 1000 */
	unsigned long long v64;
	v64 = (unsigned long long)gp2x_get_ticks_us_() * 4294968;
	return v64 >> 32;
}

static void timer_cleanup(void)
{
	TIMER_REG(0x40) = 0x0c;	/* be sure clocks are on */
	TIMER_REG(0x08) = 0x23;	/* stop the timer, clear irq in case it's pending */
	TIMER_REG(0x00) = 0;	/* clear counter */
	TIMER_REG(0x40) = 0;	/* clocks off */
	TIMER_REG(0x44) = 0;	/* dividers back to default */
}

void pollux_init(void)
{
	struct fb_fix_screeninfo fbfix;
	int i, ret;

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

	memregs	= mmap(0, 0x20000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);
	if (memregs == MAP_FAILED) {
		perror("mmap(memregs) failed");
		exit(1);
	}
	memregl = (volatile void *)memregs;

	fbdev = open("/dev/fb0", O_RDWR);
	if (fbdev < 0) {
		perror("can't open fbdev");
		exit(1);
	}

	ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix);
	if (ret == -1) {
		perror("ioctl(fbdev) failed");
		exit(1);
	}

	printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start);
	fb_paddr[0] = fbfix.smem_start;

	gp2x_screens[0] = mmap(0, 320*240*2*fb_buf_count, PROT_READ|PROT_WRITE,
			MAP_SHARED, memdev, fb_paddr[0]);
	if (gp2x_screens[0] == MAP_FAILED)
	{
		perror("mmap(gp2x_screens) failed");
		exit(1);
	}
	memset(gp2x_screens[0], 0, 320*240*2*fb_buf_count);

	printf("  %p -> %08x\n", gp2x_screens[0], fb_paddr[0]);
	for (i = 1; i < fb_buf_count; i++)
	{
		fb_paddr[i] = fb_paddr[i-1] + 320*240*2;
		gp2x_screens[i] = (char *)gp2x_screens[i-1] + 320*240*2;
		printf("  %p -> %08x\n", gp2x_screens[i], fb_paddr[i]);
	}
	fb_work_buf = 0;
	g_screen_ptr = gp2x_screens[0];

	battdev = open("/dev/pollux_batt", O_RDONLY);
	if (battdev < 0)
		perror("Warning: could't open pollux_batt");

	/* setup timer */
	if (TIMER_REG(0x08) & 8)
		timer_cleanup();

	TIMER_REG(0x44) = 0x922; /* using PLL1, divider value 147 */
	TIMER_REG(0x40) = 0x0c;  /* clocks on */
	TIMER_REG(0x08) = 0x6b;  /* run timer, clear irq, latch value */

	pllsetreg0 = memregl[0xf004>>2];
	memtimex_old[0] = memregs[0x14802>>1];
	memtimex_old[1] = memregs[0x14804>>1];

	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 = gp2x_get_ticks_ms_;
	gp2x_get_ticks_us = gp2x_get_ticks_us_;
}

void pollux_finish(void)
{
	/* switch to default fb mem, turn portrait off */
	memregl[0x406C>>2] = fb_paddr[0];
	memregl[0x4058>>2] |= 0x10;
	close(fbdev);

	gp2x_video_changemode_ll_(16);
	unset_ram_timings_();
	if (cpuclk_was_changed) {
		memregl[0xf004>>2] = pllsetreg0;
		memregl[0xf07c>>2] |= 0x8000;
	}

	munmap((void *)memregs, 0x20000);
	close(memdev);
	if (battdev >= 0)
		close(battdev);
}
Commit	Line	Data
	1	/*
	2	* <random_info=mem_map>
	3	* 00000000-029fffff linux (42MB)
	4	* 02a00000-02dfffff fb (4MB, 153600B really used)
	5	* 02e00000-02ffffff sound dma (2MB)
	6	* 03000000-03ffffff MPEGDEC (?, 16MB)
	7	* </random_info>
	8	*/
	9	#include <stdio.h>
	10	#include <stdlib.h>
	11	#include <string.h>
	12	#include <math.h>
	13	#include <sys/types.h>
	14	#include <sys/stat.h>
	15	#include <fcntl.h>
	16	#include <sys/mman.h>
	17	#include <unistd.h>
	18	#include <sys/ioctl.h>
	19	#include <linux/fb.h>
	20
	21	#include "soc.h"
	22	#include "plat_gp2x.h"
	23	#include "../common/emu.h"
	24	#include "../common/arm_utils.h"
	25	#include "pollux_set.h"
	26
	27	static volatile unsigned short *memregs;
	28	static volatile unsigned long *memregl;
	29	static int memdev = -1;
	30	static int battdev = -1;
	31
	32	extern void *gp2x_screens[4];
	33
	34	#define fb_buf_count 4
	35	static unsigned int fb_paddr[fb_buf_count];
	36	static int fb_work_buf;
	37	static int fbdev = -1;
	38
	39	static char cpuclk_was_changed = 0;
	40	static unsigned short memtimex_old[2];
	41	static unsigned int pllsetreg0;
	42	static int last_pal_setting = 0;
	43
	44
	45	/* misc */
	46	static void pollux_set_fromenv(const char *env_var)
	47	{
	48	const char *set_string;
	49	set_string = getenv(env_var);
	50	if (set_string)
	51	pollux_set(memregs, set_string);
	52	else
	53	printf("env var %s not defined.\n", env_var);
	54	}
	55
	56	/* video stuff */
	57	static void pollux_video_flip(int buf_count)
	58	{
	59	memregl[0x406C>>2] = fb_paddr[fb_work_buf];
	60	memregl[0x4058>>2] \|= 0x10;
	61	fb_work_buf++;
	62	if (fb_work_buf >= buf_count)
	63	fb_work_buf = 0;
	64	g_screen_ptr = gp2x_screens[fb_work_buf];
	65	}
	66
	67	static void gp2x_video_flip_(void)
	68	{
	69	pollux_video_flip(fb_buf_count);
	70	}
	71
	72	/* doulblebuffered flip */
	73	static void gp2x_video_flip2_(void)
	74	{
	75	pollux_video_flip(2);
	76	}
	77
	78	static void gp2x_video_changemode_ll_(int bpp)
	79	{
	80	static int prev_bpp = 0;
	81	int code = 0, bytes = 2;
	82	int rot_cmd[2] = { 0, 0 };
	83	unsigned int r;
	84	char buff[32];
	85	int ret;
	86
	87	if (bpp == prev_bpp)
	88	return;
	89	prev_bpp = bpp;
	90
	91	printf("changemode: %dbpp rot=%d\n", abs(bpp), bpp < 0);
	92
	93	/* negative bpp means rotated mode */
	94	rot_cmd[0] = (bpp < 0) ? 6 : 5;
	95	ret = ioctl(fbdev, _IOW('D', 90, int[2]), rot_cmd);
	96	if (ret < 0)
	97	perror("rot ioctl failed");
	98	memregl[0x4004>>2] = (bpp < 0) ? 0x013f00ef : 0x00ef013f;
	99	memregl[0x4000>>2] \|= 1 << 3;
	100
	101	/* the above ioctl resets LCD timings, so set them here */
	102	snprintf(buff, sizeof(buff), "POLLUX_LCD_TIMINGS_%s", last_pal_setting ? "PAL" : "NTSC");
	103	pollux_set_fromenv(buff);
	104
	105	switch (abs(bpp))
	106	{
	107	case 8:
	108	code = 0x443a;
	109	bytes = 1;
	110	break;
	111
	112	case 15:
	113	case 16:
	114	code = 0x4432;
	115	bytes = 2;
	116	break;
	117
	118	default:
	119	printf("unhandled bpp request: %d\n", abs(bpp));
	120	return;
	121	}
	122
	123	memregl[0x405c>>2] = bytes;
	124	memregl[0x4060>>2] = bytes * (bpp < 0 ? 240 : 320);
	125
	126	r = memregl[0x4058>>2];
	127	r = (r & 0xffff) \| (code << 16) \| 0x10;
	128	memregl[0x4058>>2] = r;
	129	}
	130
	131	static void gp2x_video_setpalette_(int *pal, int len)
	132	{
	133	/* pollux palette is 16bpp only.. */
	134	int i;
	135	for (i = 0; i < len; i++)
	136	{
	137	int c = pal[i];
	138	c = ((c >> 8) & 0xf800) \| ((c >> 5) & 0x07c0) \| ((c >> 3) & 0x001f);
	139	memregl[0x4070>>2] = (i << 24) \| c;
	140	}
	141	}
	142
	143	static void gp2x_video_RGB_setscaling_(int ln_offs, int W, int H)
	144	{
	145	/* maybe a job for 3d hardware? */
	146	}
	147
	148	static void gp2x_video_wait_vsync_(void)
	149	{
	150	while (!(memregl[0x308c>>2] & (1 << 10)));
	151	spend_cycles(128);
	152	memregl[0x308c>>2] \|= 1 << 10;
	153	}
	154
	155	/* CPU clock */
	156	static void gp2x_set_cpuclk_(unsigned int mhz)
	157	{
	158	char buff[24];
	159	snprintf(buff, sizeof(buff), "cpuclk=%u", mhz);
	160	pollux_set(memregs, buff);
	161
	162	cpuclk_was_changed = 1;
	163	}
	164
	165	/* RAM timings */
	166	static void set_ram_timings_(void)
	167	{
	168	pollux_set_fromenv("POLLUX_RAM_TIMINGS");
	169	}
	170
	171	static void unset_ram_timings_(void)
	172	{
	173	int i;
	174
	175	memregs[0x14802>>1] = memtimex_old[0];
	176	memregs[0x14804>>1] = memtimex_old[1] \| 0x8000;
	177
	178	for (i = 0; i < 0x100000; i++)
	179	if (!(memregs[0x14804>>1] & 0x8000))
	180	break;
	181
	182	printf("RAM timings reset to startup values.\n");
	183	}
	184
	185	/* LCD refresh */
	186	static void set_lcd_custom_rate_(int is_pal)
	187	{
	188	/* just remember PAL/NTSC. We always set timings in _changemode_ll() */
	189	last_pal_setting = is_pal;
	190	}
	191
	192	static void unset_lcd_custom_rate_(void)
	193	{
	194	}
	195
	196	static void set_lcd_gamma_(int g100, int A_SNs_curve)
	197	{
	198	/* hm, the LCD possibly can do it (but not POLLUX) */
	199	}
	200
	201	static int gp2x_read_battery_(void)
	202	{
	203	unsigned short magic_val = 0;
	204
	205	if (battdev < 0)
	206	return -1;
	207	if (read(battdev, &magic_val, sizeof(magic_val)) != sizeof(magic_val))
	208	return -1;
	209	switch (magic_val) {
	210	default:
	211	case 1: return 100;
	212	case 2: return 66;
	213	case 3: return 40;
	214	case 4: return 0;
	215	}
	216	}
	217
	218	#define TIMER_BASE3 0x1980
	219	#define TIMER_REG(x) memregl[(TIMER_BASE3 + x) >> 2]
	220
	221	unsigned int gp2x_get_ticks_us_(void)
	222	{
	223	TIMER_REG(0x08) = 0x4b; /* run timer, latch value */
	224	return TIMER_REG(0);
	225	}
	226
	227	unsigned int gp2x_get_ticks_ms_(void)
	228	{
	229	/* approximate /= 1000 */
	230	unsigned long long v64;
	231	v64 = (unsigned long long)gp2x_get_ticks_us_() * 4294968;
	232	return v64 >> 32;
	233	}
	234
	235	static void timer_cleanup(void)
	236	{
	237	TIMER_REG(0x40) = 0x0c; /* be sure clocks are on */
	238	TIMER_REG(0x08) = 0x23; /* stop the timer, clear irq in case it's pending */
	239	TIMER_REG(0x00) = 0; /* clear counter */
	240	TIMER_REG(0x40) = 0; /* clocks off */
	241	TIMER_REG(0x44) = 0; /* dividers back to default */
	242	}
	243
	244	void pollux_init(void)
	245	{
	246	struct fb_fix_screeninfo fbfix;
	247	int i, ret;
	248
	249	memdev = open("/dev/mem", O_RDWR);
	250	if (memdev == -1) {
	251	perror("open(/dev/mem) failed");
	252	exit(1);
	253	}
	254
	255	memregs = mmap(0, 0x20000, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);
	256	if (memregs == MAP_FAILED) {
	257	perror("mmap(memregs) failed");
	258	exit(1);
	259	}
	260	memregl = (volatile void *)memregs;
	261
	262	fbdev = open("/dev/fb0", O_RDWR);
	263	if (fbdev < 0) {
	264	perror("can't open fbdev");
	265	exit(1);
	266	}
	267
	268	ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix);
	269	if (ret == -1) {
	270	perror("ioctl(fbdev) failed");
	271	exit(1);
	272	}
	273
	274	printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start);
	275	fb_paddr[0] = fbfix.smem_start;
	276
	277	gp2x_screens[0] = mmap(0, 3202402*fb_buf_count, PROT_READ\|PROT_WRITE,
	278	MAP_SHARED, memdev, fb_paddr[0]);
	279	if (gp2x_screens[0] == MAP_FAILED)
	280	{
	281	perror("mmap(gp2x_screens) failed");
	282	exit(1);
	283	}
	284	memset(gp2x_screens[0], 0, 3202402*fb_buf_count);
	285
	286	printf(" %p -> %08x\n", gp2x_screens[0], fb_paddr[0]);
	287	for (i = 1; i < fb_buf_count; i++)
	288	{
	289	fb_paddr[i] = fb_paddr[i-1] + 3202402;
	290	gp2x_screens[i] = (char )gp2x_screens[i-1] + 320240*2;
	291	printf(" %p -> %08x\n", gp2x_screens[i], fb_paddr[i]);
	292	}
	293	fb_work_buf = 0;
	294	g_screen_ptr = gp2x_screens[0];
	295
	296	battdev = open("/dev/pollux_batt", O_RDONLY);
	297	if (battdev < 0)
	298	perror("Warning: could't open pollux_batt");
	299
	300	/* setup timer */
	301	if (TIMER_REG(0x08) & 8)
	302	timer_cleanup();
	303
	304	TIMER_REG(0x44) = 0x922; /* using PLL1, divider value 147 */
	305	TIMER_REG(0x40) = 0x0c; /* clocks on */
	306	TIMER_REG(0x08) = 0x6b; /* run timer, clear irq, latch value */
	307
	308	pllsetreg0 = memregl[0xf004>>2];
	309	memtimex_old[0] = memregs[0x14802>>1];
	310	memtimex_old[1] = memregs[0x14804>>1];
	311
	312	gp2x_video_flip = gp2x_video_flip_;
	313	gp2x_video_flip2 = gp2x_video_flip2_;
	314	gp2x_video_changemode_ll = gp2x_video_changemode_ll_;
	315	gp2x_video_setpalette = gp2x_video_setpalette_;
	316	gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_;
	317	gp2x_video_wait_vsync = gp2x_video_wait_vsync_;
	318
	319	gp2x_set_cpuclk = gp2x_set_cpuclk_;
	320
	321	set_lcd_custom_rate = set_lcd_custom_rate_;
	322	unset_lcd_custom_rate = unset_lcd_custom_rate_;
	323	set_lcd_gamma = set_lcd_gamma_;
	324
	325	set_ram_timings = set_ram_timings_;
	326	unset_ram_timings = unset_ram_timings_;
	327	gp2x_read_battery = gp2x_read_battery_;
	328
	329	gp2x_get_ticks_ms = gp2x_get_ticks_ms_;
	330	gp2x_get_ticks_us = gp2x_get_ticks_us_;
	331	}
	332
	333	void pollux_finish(void)
	334	{
	335	/* switch to default fb mem, turn portrait off */
	336	memregl[0x406C>>2] = fb_paddr[0];
	337	memregl[0x4058>>2] \|= 0x10;
	338	close(fbdev);
	339
	340	gp2x_video_changemode_ll_(16);
	341	unset_ram_timings_();
	342	if (cpuclk_was_changed) {
	343	memregl[0xf004>>2] = pllsetreg0;
	344	memregl[0xf07c>>2] \|= 0x8000;
	345	}
	346
	347	munmap((void *)memregs, 0x20000);
	348	close(memdev);
	349	if (battdev >= 0)
	350	close(battdev);
	351	}
	352