X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=gp2x%2Fsoc_mmsp2.c;h=32399d76c2dd3ad5dfad13614d97a3c3e2590bc3;hb=fa5e045bdc817112c1abf19e65e2d3481d51c48a;hp=86e3ac871b65a29d43dc7a6bb1827b87b596ecdd;hpb=d572cbad9886a04f8c51edb825dc6aaec9b02e23;p=libpicofe.git diff --git a/gp2x/soc_mmsp2.c b/gp2x/soc_mmsp2.c index 86e3ac8..32399d7 100644 --- a/gp2x/soc_mmsp2.c +++ b/gp2x/soc_mmsp2.c @@ -1,6 +1,7 @@ #include #include #include +#include #include #include #include @@ -9,9 +10,10 @@ #include "soc.h" #include "soc_mmsp2.h" -#include "gp2x.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; @@ -136,6 +138,208 @@ 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 + +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 + +void set_ram_timings(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"); +} + +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; + } +} + +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"); +} + +void unset_lcd_custom_rate(void) +{ + printf("reset to prev LCD refresh.\n"); + set_reg_setting(lcd_rate_defaults); +} + +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. */ @@ -244,7 +448,14 @@ void mmsp2_init(void) memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs)); - // touchscreen + /* 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"); @@ -259,18 +470,25 @@ void mmsp2_init(void) /* 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(); } 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);