-/*
- * PicoDrive
- * (C) notaz, 2006-2009
- *
- * This work is licensed under the terms of MAME license.
- * See COPYING file in the top-level directory.
- */
-#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;
-
-/* 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);
-}
-