really rough prototype code

src/flashcart/ed64/ed64.c

@@ -18,17 +18,23 @@ extern int ed_exit(void);
 static flashcart_err_t ed64_init (void) {
 
     // TODO: partly already done, see https://github.com/DragonMinded/libdragon/blob/4ec469d26b6dc4e308caf3d5b86c2b340b708bbd/src/libcart/cart.c#L1064
-
+    FIL fil, rsfil;
-    // FIXME: Update firmware if needed.
+    UINT br;
-    // FIXME: Enable RTC if available.
+    if (f_open(&rsfil, strip_sd_prefix("/menu/RESET"), FA_READ | FA_OPEN_EXISTING) == FR_OK) {
-
+        f_close(&rsfil);
-    // FIXME: retrive a config file from (probably SRAM) that might have been set.
+        f_unlink(strip_sd_prefix("/menu/RESET"));
-    // This should include the location of the ROM and its save type.
+        int size = KiB(128);
-    // Then, if it is valid, perform a save.
+        uint8_t cartsave_data[size];
+        f_open(&fil, strip_sd_prefix("test.sav"), FA_WRITE | FA_CREATE_NEW);
+        getSRAM(cartsave_data, size);
+        f_write(&fil, cartsave_data, size, &br);
+        f_close(&fil);
+    }
 
     return FLASHCART_OK;
 }
 
+
 static flashcart_err_t ed64_deinit (void) {
 
     // For the moment, just use libCart exit.
@@ -134,32 +140,16 @@ static flashcart_err_t ed64_load_file (char *file_path, uint32_t rom_offset, uin
 }
 
 static flashcart_err_t ed64_load_save (char *save_path) {
-    void *address =  NULL;
+    //ed64_save_type_t type = ed64_ll_get_save_type();
-    ed64_save_type_t type = ed64_ll_get_save_type();
-
-    switch (type) {
-        case SAVE_TYPE_EEPROM_4K:
-        case SAVE_TYPE_EEPROM_16K:
-        case SAVE_TYPE_SRAM:
-        case SAVE_TYPE_SRAM_128K:
-        case SAVE_TYPE_FLASHRAM:
-            address = (void *) (SRAM_ADDRESS);
-            break;
-        case SAVE_TYPE_NONE:
-        default:
-            return FLASHCART_ERR_ARGS;
-    }
-
     FIL fil;
     UINT br;
 
-    if (f_open(&fil, strip_sd_prefix(save_path), FA_READ) != FR_OK) {
+    if (f_open(&fil, strip_sd_prefix("test.sav"), FA_READ) == FR_OK) {
-        return FLASHCART_ERR_LOAD;
-    }
 
-    size_t save_size = f_size(&fil);
+    size_t save_size = KiB(128);
+    uint8_t cartsave_data[save_size];
 
-    if (f_read(&fil, address, save_size, &br) != FR_OK) {
+    if (f_read(&fil, cartsave_data, save_size, &br) != FR_OK) {
             f_close(&fil);
             return FLASHCART_ERR_LOAD;
     }
@@ -168,9 +158,14 @@ static flashcart_err_t ed64_load_save (char *save_path) {
         return FLASHCART_ERR_LOAD;
     }
 
-    if (br != save_size) {
+    setSRAM(cartsave_data, save_size);
-        return FLASHCART_ERR_LOAD;
 }
+    FIL rsfil;
+    UINT rsbr;
+    TCHAR byte[1];
+    f_open(&rsfil, strip_sd_prefix("/menu/RESET"), FA_WRITE | FA_CREATE_ALWAYS);
+    f_write(&rsfil, (void *)byte, 1, &rsbr);
+    f_close(&rsfil);
 
     return FLASHCART_OK;
 }

src/flashcart/ed64/ed64_ll.c

@@ -114,3 +114,200 @@ void ed64_ll_set_sram_bank(uint8_t bank) {
     ed64_ll_sram_bank = bank == 0 ? 0 : 1;
 
 }
+
+
+#include <malloc.h>
+#include <stdint.h>
+#include <string.h>
+#include "types.h"
+
+
+void PI_Init(void) {
+	PI_DMAWait();
+	IO_WRITE(PI_STATUS_REG, 0x03);
+}
+
+// Inits PI for sram transfer
+void PI_Init_SRAM(void) {
+	
+	IO_WRITE(PI_BSD_DOM2_LAT_REG, 0x05);
+	IO_WRITE(PI_BSD_DOM2_PWD_REG, 0x0C);
+	IO_WRITE(PI_BSD_DOM2_PGS_REG, 0x0D);
+	IO_WRITE(PI_BSD_DOM2_RLS_REG, 0x02);
+	
+}
+
+void PI_DMAWait(void) {
+	  
+	while (IO_READ(PI_STATUS_REG) & (PI_STATUS_IO_BUSY | PI_STATUS_DMA_BUSY));
+}
+
+
+void PI_DMAFromSRAM(void *dest, u32 offset, u32 size) {
+	
+
+	IO_WRITE(PI_DRAM_ADDR_REG, K1_TO_PHYS(dest));
+	IO_WRITE(PI_CART_ADDR_REG, (0xA8000000 + offset));
+	 asm volatile ("" : : : "memory");
+	IO_WRITE(PI_WR_LEN_REG, (size - 1));
+	 asm volatile ("" : : : "memory");
+ 
+}
+
+
+void PI_DMAToSRAM(void *src, u32 offset, u32 size) { //void*
+	PI_DMAWait();
+
+	IO_WRITE(PI_STATUS_REG, 2);
+	IO_WRITE(PI_DRAM_ADDR_REG, K1_TO_PHYS(src));
+	IO_WRITE(PI_CART_ADDR_REG, (0xA8000000 + offset));
+	IO_WRITE(PI_RD_LEN_REG, (size - 1));
+}
+
+void PI_DMAFromCart(void* dest, void* src, u32 size) {
+	PI_DMAWait();
+
+	IO_WRITE(PI_STATUS_REG, 0x03);
+	IO_WRITE(PI_DRAM_ADDR_REG, K1_TO_PHYS(dest));
+	IO_WRITE(PI_CART_ADDR_REG, K0_TO_PHYS(src));
+	IO_WRITE(PI_WR_LEN_REG, (size - 1));
+}
+
+
+void PI_DMAToCart(void* dest, void* src, u32 size) {
+	PI_DMAWait();
+
+	IO_WRITE(PI_STATUS_REG, 0x02);
+	IO_WRITE(PI_DRAM_ADDR_REG, K1_TO_PHYS(src));
+	IO_WRITE(PI_CART_ADDR_REG, K0_TO_PHYS(dest));
+	IO_WRITE(PI_RD_LEN_REG, (size - 1));
+}
+
+
+// Wrapper to support unaligned access to memory
+void PI_SafeDMAFromCart(void *dest, void *src, u32 size) {
+	if (!dest || !src || !size) return;
+
+	u32 unalignedSrc  = ((u32)src)  % 2;
+	u32 unalignedDest = ((u32)dest) % 8;
+
+	//FIXME: Do i really need to check if size is 16bit aligned?
+	if (!unalignedDest && !unalignedSrc && !(size % 2)) {
+		PI_DMAFromCart(dest, src, size);
+		PI_DMAWait();
+
+		return;
+	}
+
+	void* newSrc = (void*)(((u32)src) - unalignedSrc);
+	u32 newSize = (size + unalignedSrc) + ((size + unalignedSrc) % 2);
+
+	u8 *buffer = memalign(8, newSize);
+	PI_DMAFromCart(buffer, newSrc, newSize);
+	PI_DMAWait();
+
+	memcpy(dest, (buffer + unalignedSrc), size);
+
+	free(buffer);
+}
+
+#include "types.h"
+
+int getSRAM( uint8_t *buffer, int size){
+    while (dma_busy()) ;
+
+    IO_WRITE(PI_BSD_DOM2_LAT_REG, 0x05);
+    IO_WRITE(PI_BSD_DOM2_PWD_REG, 0x0C);
+    IO_WRITE(PI_BSD_DOM2_PGS_REG, 0x0D);
+    IO_WRITE(PI_BSD_DOM2_RLS_REG, 0x02);
+
+    while (dma_busy()) ;
+
+    PI_Init();
+
+    while (dma_busy()) ;
+
+    PI_DMAFromSRAM(buffer, 0, size) ;
+
+    while (dma_busy()) ;
+
+    IO_WRITE(PI_BSD_DOM2_LAT_REG, 0x40);
+    IO_WRITE(PI_BSD_DOM2_PWD_REG, 0x12);
+    IO_WRITE(PI_BSD_DOM2_PGS_REG, 0x07);
+    IO_WRITE(PI_BSD_DOM2_RLS_REG, 0x03);
+
+    return 1;
+}
+
+int getEeprom(  uint8_t *buffer){
+    int blocks=(16*1024)/8;
+    for( int b = 0; b < blocks; b++ ) {
+        eeprom_read( b, &buffer[b * 8] );
+    }
+
+    return 1;
+}
+
+
+/*
+sram upload
+*/
+int setSRAM(  uint8_t *buffer,int size){
+     //half working
+    PI_DMAWait();
+    //Timing
+    PI_Init_SRAM();
+
+    //Readmode
+    PI_Init();
+
+    data_cache_hit_writeback_invalidate(buffer,size);
+     while (dma_busy());
+    PI_DMAToSRAM(buffer, 0, size);
+    data_cache_hit_writeback_invalidate(buffer,size);
+
+    //Wait
+    PI_DMAWait();
+    //Restore evd Timing
+    setSDTiming();
+
+    return 1;
+}
+
+
+int setEeprom(uint8_t *buffer){
+    int blocks=(16*1024)/8;
+    for( int b = 0; b < blocks; b++ ) {
+        eeprom_write( b, &buffer[b * 8] );
+    }
+
+    return 1;
+}
+
+void setSDTiming(void){
+
+    // PI_DMAWait();
+    IO_WRITE(PI_BSD_DOM1_LAT_REG, 0x40);
+    IO_WRITE(PI_BSD_DOM1_PWD_REG, 0x12);
+    IO_WRITE(PI_BSD_DOM1_PGS_REG, 0x07);
+    IO_WRITE(PI_BSD_DOM1_RLS_REG, 0x03);
+
+    IO_WRITE(PI_BSD_DOM2_LAT_REG, 0x40);
+    IO_WRITE(PI_BSD_DOM2_PWD_REG, 0x12);
+    IO_WRITE(PI_BSD_DOM2_PGS_REG, 0x07);
+    IO_WRITE(PI_BSD_DOM2_RLS_REG, 0x03);
+}
+
+
+void restoreTiming(void) {
+    //n64 timing restore :>
+    IO_WRITE(PI_BSD_DOM1_LAT_REG, 0x40);
+    IO_WRITE(PI_BSD_DOM1_PWD_REG, 0x12);
+    IO_WRITE(PI_BSD_DOM1_PGS_REG, 0x07);
+    IO_WRITE(PI_BSD_DOM1_RLS_REG, 0x03);
+
+    IO_WRITE(PI_BSD_DOM2_LAT_REG, 0x40);
+    IO_WRITE(PI_BSD_DOM2_PWD_REG, 0x12);
+    IO_WRITE(PI_BSD_DOM2_PGS_REG, 0x07);
+    IO_WRITE(PI_BSD_DOM2_RLS_REG, 0x03);
+}

src/flashcart/ed64/ed64_ll.h

@@ -7,10 +7,11 @@
 #ifndef FLASHCART_ED64_LL_H__
 #define FLASHCART_ED64_LL_H__
 
-
+#include <stdlib.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdbool.h>
+#include "types.h"
 
 /**
  * @addtogroup ed64
@@ -40,4 +41,150 @@ void ed64_ll_set_save_type(ed64_save_type_t type);
 
 /** @} */ /* ed64 */
 
+
+//sram.h
+
+void data_cache_hit_writeback_invalidate(volatile void *, unsigned long);
+unsigned int CRC_Calculate(unsigned int crc, unsigned char* buf, unsigned int len);
+void dma_write_sram(void* src, u32 offset, u32 size);
+void dma_read_sram(void *dest, u32 offset, u32 size);
+void dma_write_s(void * ram_address, unsigned long pi_address, unsigned long len);
+void dma_read_s(void * ram_address, unsigned long pi_address, unsigned long len);
+int writeSram(void* src, u32 size);
+void setSDTiming(void);
+
+
+void PI_Init(void);
+void PI_Init_SRAM(void);
+void PI_DMAWait(void);
+void PI_DMAFromCart(void* dest, void* src, u32 size);
+void PI_DMAToCart(void* dest, void* src, u32 size);
+void PI_DMAFromSRAM(void *dest, u32 offset, u32 size);
+void PI_DMAToSRAM(void* src, u32 offset, u32 size);
+void PI_SafeDMAFromCart(void *dest, void *src, u32 size);
+
+//memory
+/*** MEMORY ***/
+void *safe_memalign(size_t boundary, size_t size);
+void *safe_calloc(size_t nmemb, size_t size);
+void *safe_malloc(size_t size);
+void safe_free(void *ptr);
+void *safe_memset(void *s, int c, size_t n);
+void *safe_memcpy(void *dest, const void *src, size_t n);
+
+
+#define DP_BASE_REG		0x04100000
+#define VI_BASE_REG		0x04400000
+#define PI_BASE_REG		0x04600000
+#define PIF_RAM_START		0x1FC007C0
+
+
+/*
+ * PI status register has 3 bits active when read from (PI_STATUS_REG - read)
+ *	Bit 0: DMA busy - set when DMA is in progress
+ *	Bit 1: IO busy  - set when IO is in progress
+ *	Bit 2: Error    - set when CPU issues IO request while DMA is busy
+ */
+
+#define PI_STATUS_REG		(PI_BASE_REG+0x10)
+
+/* PI DRAM address (R/W): starting RDRAM address */
+#define PI_DRAM_ADDR_REG	(PI_BASE_REG+0x00)	/* DRAM address */
+
+/* PI pbus (cartridge) address (R/W): starting AD16 address */
+#define PI_CART_ADDR_REG	(PI_BASE_REG+0x04)
+
+/* PI read length (R/W): read data length */
+#define PI_RD_LEN_REG		(PI_BASE_REG+0x08)
+
+/* PI write length (R/W): write data length */
+#define PI_WR_LEN_REG		(PI_BASE_REG+0x0C)
+
+/*
+ * PI status (R): [0] DMA busy, [1] IO busy, [2], error
+ *           (W): [0] reset controller (and abort current op), [1] clear intr
+ */
+
+#define PI_BSD_DOM1_LAT_REG	(PI_BASE_REG+0x14)
+
+/* PI dom1 pulse width (R/W): [7:0] domain 1 device R/W strobe pulse width */
+#define PI_BSD_DOM1_PWD_REG	(PI_BASE_REG+0x18)
+
+/* PI dom1 page size (R/W): [3:0] domain 1 device page size */
+#define PI_BSD_DOM1_PGS_REG	(PI_BASE_REG+0x1C)    /*   page size */
+
+/* PI dom1 release (R/W): [1:0] domain 1 device R/W release duration */
+#define PI_BSD_DOM1_RLS_REG	(PI_BASE_REG+0x20)
+/* PI dom2 latency (R/W): [7:0] domain 2 device latency */
+#define PI_BSD_DOM2_LAT_REG	(PI_BASE_REG+0x24)    /* Domain 2 latency */
+
+/* PI dom2 pulse width (R/W): [7:0] domain 2 device R/W strobe pulse width */
+#define PI_BSD_DOM2_PWD_REG	(PI_BASE_REG+0x28)    /*   pulse width */
+
+/* PI dom2 page size (R/W): [3:0] domain 2 device page size */
+#define PI_BSD_DOM2_PGS_REG	(PI_BASE_REG+0x2C)    /*   page size */
+
+/* PI dom2 release (R/W): [1:0] domain 2 device R/W release duration */
+#define PI_BSD_DOM2_RLS_REG	(PI_BASE_REG+0x30)    /*   release duration */
+
+
+#define	PI_DOMAIN1_REG		PI_BSD_DOM1_LAT_REG
+#define	PI_DOMAIN2_REG		PI_BSD_DOM2_LAT_REG
+
+
+#define	PI_STATUS_ERROR		0x04
+#define	PI_STATUS_IO_BUSY	0x02
+#define	PI_STATUS_DMA_BUSY	0x01
+
+#define                      DPC_START                    (DP_BASE_REG + 0x00)
+#define                      DPC_END                      (DP_BASE_REG + 0x04)
+#define                      DPC_CURRENT                  (DP_BASE_REG + 0x08)
+#define                      DPC_STATUS                   (DP_BASE_REG + 0x0C)
+#define                      DPC_CLOCK                    (DP_BASE_REG + 0x10)
+#define                      DPC_BUFBUSY                  (DP_BASE_REG + 0x14)
+#define                      DPC_PIPEBUSY                 (DP_BASE_REG + 0x18)
+#define                      DPC_TMEM                     (DP_BASE_REG + 0x1C)
+
+#define	VI_CONTROL	(VI_BASE_REG + 0x00)
+#define	VI_FRAMEBUFFER	(VI_BASE_REG + 0x04)
+#define	VI_WIDTH	(VI_BASE_REG + 0x08)
+#define	VI_V_INT	(VI_BASE_REG + 0x0C)
+#define	VI_CUR_LINE	(VI_BASE_REG + 0x10)
+#define	VI_TIMING	(VI_BASE_REG + 0x14)
+#define	VI_V_SYNC	(VI_BASE_REG + 0x18)
+#define	VI_H_SYNC	(VI_BASE_REG + 0x1C)
+#define	VI_H_SYNC2	(VI_BASE_REG + 0x20)
+#define	VI_H_LIMITS	(VI_BASE_REG + 0x24)
+#define	VI_COLOR_BURST	(VI_BASE_REG + 0x28)
+#define	VI_H_SCALE	(VI_BASE_REG + 0x2C)
+#define	VI_VSCALE	(VI_BASE_REG + 0x30)
+
+#define	PHYS_TO_K0(x)	((u32)(x)|0x80000000)	/* physical to kseg0 */
+#define	K0_TO_PHYS(x)	((u32)(x)&0x1FFFFFFF)	/* kseg0 to physical */
+#define	PHYS_TO_K1(x)	((u32)(x)|0xA0000000)	/* physical to kseg1 */
+#define	K1_TO_PHYS(x)	((u32)(x)&0x1FFFFFFF)	/* kseg1 to physical */
+
+#define	IO_READ(addr)		(*(volatile u32*)PHYS_TO_K1(addr))
+#define	IO_WRITE(addr,data)	(*(volatile u32*)PHYS_TO_K1(addr)=(u32)(data))
+
+#define FRAM_EXECUTE_CMD		0xD2000000
+#define FRAM_STATUS_MODE_CMD	0xE1000000
+#define FRAM_ERASE_OFFSET_CMD	0x4B000000
+#define FRAM_WRITE_OFFSET_CMD	0xA5000000
+#define FRAM_ERASE_MODE_CMD		0x78000000
+#define FRAM_WRITE_MODE_CMD		0xB4000000
+#define FRAM_READ_MODE_CMD		0xF0000000
+
+#define FRAM_STATUS_REG	0xA8000000
+#define FRAM_COMMAND_REG 0xA8010000
+
+int getSRAM( uint8_t *buffer, int size);
+int getEeprom(  uint8_t *buffer);
+
+int setSRAM( uint8_t *buffer, int size);
+int setEeprom( uint8_t *buffer);
+
+
+
+
 #endif

src/flashcart/ed64/types.h

@@ -0,0 +1,36 @@
+/* 
+ * File:   types.h
+ * Author: KRIK
+ *
+ * Created on 16 Àïðåëü 2011 ã., 2:24
+ */
+
+#include <stdint.h>
+
+#ifndef _TYPES_H
+#define	_TYPES_H
+
+#define u8 unsigned char
+#define u16 unsigned short
+#define u32 unsigned long
+#define u64 unsigned long long
+
+#define vu8 volatile unsigned char
+#define vu16 volatile unsigned short
+#define vu32 volatile unsigned long
+#define vu64 volatile unsigned long long
+
+#define s8 signed char
+#define s16 short
+#define s32 long
+#define s64 long long
+
+
+typedef volatile uint64_t sim_vu64;
+typedef volatile uint64_t sim_vu64;
+typedef unsigned int sim_u32;
+typedef uint64_t sim_u64;
+
+
+#endif	/* _TYPES_H */
+