mirror of
https://github.com/RaySollium99/libpicofe.git
synced 2025-09-05 14:57:46 -04:00
further prep for Wiz port. Cleanups, rm cpuctrl mmuhack; add warm
git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@704 be3aeb3a-fb24-0410-a615-afba39da0efa
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notaz
parent
d572cbad98
commit
fa5e045bdc
24 changed files with 679 additions and 948 deletions
222
gp2x/soc_mmsp2.c
222
gp2x/soc_mmsp2.c
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@ -1,6 +1,7 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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@ -9,9 +10,10 @@
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#include "soc.h"
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#include "soc_mmsp2.h"
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#include "gp2x.h"
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#include "plat_gp2x.h"
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#include "../common/emu.h"
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#include "../common/arm_utils.h"
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#include "940ctl.h"
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volatile unsigned short *gp2x_memregs;
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volatile unsigned long *gp2x_memregl;
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@ -136,6 +138,208 @@ void reset940(int yes, int bank)
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gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) | (bank & 0x03);
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}
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/*
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* CPU clock
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* Fout = (m * Fin) / (p * 2^s)
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* m = MDIV+8, p = PDIV+2, s = SDIV
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*
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* m = (Fout * p * 2^s) / Fin
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*/
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#define SYS_CLK_FREQ 7372800
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void gp2x_set_cpuclk(unsigned int mhz)
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{
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unsigned int mdiv, pdiv, sdiv = 0;
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unsigned int v;
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int i;
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pdiv = 3;
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mdiv = (mhz * pdiv * 1000000) / SYS_CLK_FREQ;
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if (mdiv & ~0xff) {
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fprintf(stderr, "invalid cpuclk MHz: %u\n", mhz);
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return;
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}
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v = ((mdiv-8)<<8) | ((pdiv-2)<<2) | sdiv;
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gp2x_memregs[0x910>>1] = v;
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for (i = 0; i < 10000; i++)
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if (!(gp2x_memregs[0x902>>1] & 1))
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break;
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}
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/* RAM timings */
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static unsigned short memtimex[2];
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#define TIMING_CHECK(t, adj, mask) \
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t += adj; \
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if (t & ~mask) \
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goto bad
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void set_ram_timings(int tCAS, int tRC, int tRAS, int tWR, int tMRD, int tRFC, int tRP, int tRCD)
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{
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int i;
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TIMING_CHECK(tCAS, -2, 0x1);
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TIMING_CHECK(tRC, -1, 0xf);
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TIMING_CHECK(tRAS, -1, 0xf);
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TIMING_CHECK(tWR, -1, 0xf);
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TIMING_CHECK(tMRD, -1, 0xf);
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TIMING_CHECK(tRFC, -1, 0xf);
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TIMING_CHECK(tRP, -1, 0xf);
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TIMING_CHECK(tRCD, -1, 0xf);
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/* get spend_cycles() into cache */
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spend_cycles(1);
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gp2x_memregs[0x3802>>1] = ((tMRD & 0xF) << 12) | ((tRFC & 0xF) << 8) | ((tRP & 0xF) << 4) | (tRCD & 0xF);
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gp2x_memregs[0x3804>>1] = 0x8000 | ((tCAS & 1) << 12) | ((tRC & 0xF) << 8) | ((tRAS & 0xF) << 4) | (tWR & 0xF);
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/* be sure we don't access the mem while it's being reprogrammed */
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spend_cycles(128*1024);
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for (i = 0; i < 8*1024; i++)
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if (!(gp2x_memregs[0x3804>>1] & 0x8000))
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break;
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printf("RAM timings set.\n");
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return;
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bad:
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fprintf(stderr, "RAM timings invalid.\n");
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}
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void unset_ram_timings(void)
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{
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gp2x_memregs[0x3802>>1] = memtimex[0];
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gp2x_memregs[0x3804>>1] = memtimex[1] | 0x8000;
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printf("RAM timings reset to startup values.\n");
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}
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/* LCD refresh */
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typedef struct
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{
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unsigned short reg, valmask, val;
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}
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reg_setting;
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/* 120.00 97/0/2/7|25/ 7/ 7/11/37 */
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static const reg_setting lcd_rate_120[] =
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{
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{ 0x0914, 0xffff, (97<<8)|(0<<2)|2 }, /* UPLLSETVREG */
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{ 0x0924, 0xff00, (2<<14)|(7<<8) }, /* DISPCSETREG */
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{ 0x281A, 0x00ff, 25 }, /* .HSWID(T2) */
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{ 0x281C, 0x00ff, 7 }, /* .HSSTR(T8) */
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{ 0x281E, 0x00ff, 7 }, /* .HSEND(T7) */
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{ 0x2822, 0x01ff, 11 }, /* .VSEND (T9) */
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{ 0x2826, 0x0ff0, 37<<4 }, /* .DESTR(T3) */
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{ 0, 0, 0 }
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};
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/* 100.00 96/0/2/7|29/25/53/15/37 */
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static const reg_setting lcd_rate_100[] =
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{
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{ 0x0914, 0xffff, (96<<8)|(0<<2)|2 }, /* UPLLSETVREG */
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{ 0x0924, 0xff00, (2<<14)|(7<<8) }, /* DISPCSETREG */
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{ 0x281A, 0x00ff, 29 }, /* .HSWID(T2) */
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{ 0x281C, 0x00ff, 25 }, /* .HSSTR(T8) */
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{ 0x281E, 0x00ff, 53 }, /* .HSEND(T7) */
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{ 0x2822, 0x01ff, 15 }, /* .VSEND (T9) */
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{ 0x2826, 0x0ff0, 37<<4 }, /* .DESTR(T3) */
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{ 0, 0, 0 }
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};
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static reg_setting lcd_rate_defaults[] =
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{
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{ 0x0914, 0xffff, 0 },
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{ 0x0924, 0xff00, 0 },
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{ 0x281A, 0x00ff, 0 },
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{ 0x281C, 0x00ff, 0 },
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{ 0x281E, 0x00ff, 0 },
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{ 0x2822, 0x01ff, 0 },
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{ 0x2826, 0x0ff0, 0 },
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{ 0, 0, 0 }
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};
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static void get_reg_setting(reg_setting *set)
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{
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for (; set->reg; set++)
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{
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unsigned short val = gp2x_memregs[set->reg >> 1];
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val &= set->valmask;
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set->val = val;
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}
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}
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static void set_reg_setting(const reg_setting *set)
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{
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for (; set->reg; set++)
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{
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unsigned short val = gp2x_memregs[set->reg >> 1];
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val &= ~set->valmask;
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val |= set->val;
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gp2x_memregs[set->reg >> 1] = val;
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}
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}
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void set_lcd_custom_rate(int is_pal)
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{
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if (gp2x_memregs[0x2800>>1] & 0x100) // tv-out
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return;
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printf("setting custom LCD refresh (%d Hz)... ", is_pal ? 100 : 120);
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fflush(stdout);
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set_reg_setting(is_pal ? lcd_rate_100 : lcd_rate_120);
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printf("done.\n");
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}
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void unset_lcd_custom_rate(void)
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{
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printf("reset to prev LCD refresh.\n");
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set_reg_setting(lcd_rate_defaults);
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}
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void set_lcd_gamma(int g100, int A_SNs_curve)
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{
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float gamma = (float) g100 / 100;
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int i;
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gamma = 1 / gamma;
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/* enable gamma */
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gp2x_memregs[0x2880>>1] &= ~(1<<12);
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gp2x_memregs[0x295C>>1] = 0;
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for (i = 0; i < 256; i++)
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{
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unsigned char g;
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unsigned short s;
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const unsigned short grey50=143, grey75=177, grey25=97;
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double blah;
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if (A_SNs_curve)
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{
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// The next formula is all about gaussian interpolation
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blah = (( -128 * exp(-powf((float) i/64.0f + 2.0f , 2.0f))) +
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( -64 * exp(-powf((float) i/64.0f + 1.0f , 2.0f))) +
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(grey25 * exp(-powf((float) i/64.0f - 1.0f , 2.0f))) +
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(grey50 * exp(-powf((float) i/64.0f - 2.0f , 2.0f))) +
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(grey75 * exp(-powf((float) i/64.0f - 3.0f , 2.0f))) +
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( 256 * exp(-powf((float) i/64.0f - 4.0f , 2.0f))) +
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( 320 * exp(-powf((float) i/64.0f - 5.0f , 2.0f))) +
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( 384 * exp(-powf((float) i/64.0f - 6.0f , 2.0f)))) / 1.772637;
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blah += 0.5;
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}
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else
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{
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blah = i;
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}
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g = (unsigned char)(255.0 * pow(blah/255.0, gamma));
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//printf("%d : %d\n", i, g);
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s = (g<<8) | g;
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gp2x_memregs[0x295E>>1]= s;
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gp2x_memregs[0x295E>>1]= g;
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}
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}
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/* these are not quite MMSP2 related,
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* more to GP2X F100/F200 consoles themselves. */
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@ -244,7 +448,14 @@ void mmsp2_init(void)
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memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));
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// touchscreen
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/* default LCD refresh */
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get_reg_setting(lcd_rate_defaults);
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/* RAM timings */
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memtimex[0] = gp2x_memregs[0x3802>>1];
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memtimex[1] = gp2x_memregs[0x3804>>1];
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/* touchscreen */
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touchdev = open("/dev/touchscreen/wm97xx", O_RDONLY);
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if (touchdev >= 0) {
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FILE *pcf = fopen("/etc/pointercal", "r");
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@ -259,18 +470,25 @@ void mmsp2_init(void)
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/* disable Linux read-ahead */
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proc_set("/proc/sys/vm/max-readahead", "0\n");
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proc_set("/proc/sys/vm/min-readahead", "0\n");
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/* code940 portion */
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sharedmem940_init();
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}
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void mmsp2_finish(void)
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{
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reset940(1, 3);
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pause940(1);
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sharedmem940_finish();
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gp2x_memregs[0x290E>>1] = gp2x_screenaddr_old[0];
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gp2x_memregs[0x2910>>1] = gp2x_screenaddr_old[1];
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gp2x_memregs[0x2912>>1] = gp2x_screenaddr_old[2];
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gp2x_memregs[0x2914>>1] = gp2x_screenaddr_old[3];
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unset_ram_timings();
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unset_lcd_custom_rate();
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munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);
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munmap((void *)gp2x_memregs, 0x10000);
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close(memdev);
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