From 8c2f74d8cd8860387ef1e78c5284a6561ca844c4 Mon Sep 17 00:00:00 2001
From: Maximilian Rehkopf <ikari@elektra.micecat.ath.cx>
Date: Sat, 9 Jun 2012 21:51:15 +0200
Subject: [PATCH] firmware: SPC player (necronomfive)

---
 src/filetypes.c | 13 ++++------
 src/main.c      | 15 ++++++++++++
 src/memory.c    | 65 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/memory.h    |  9 +++++--
 src/snes.h      |  8 +++---
 5 files changed, 97 insertions(+), 13 deletions(-)

diff --git a/src/filetypes.c b/src/filetypes.c
index 9f78033..c398cb4 100644
--- a/src/filetypes.c
+++ b/src/filetypes.c
@@ -194,6 +194,7 @@ uint32_t scan_dir(char* path, FILINFO* fno_param, char mkdb, uint32_t this_dir_t
                 switch(type) {
                   case TYPE_IPS:
                   case TYPE_SMC:
+                  case TYPE_SPC:
 /*                    file_open_by_filinfo(&fno);
                     if(file_res){
                       printf("ZOMG NOOOO %d\n", file_res);
@@ -271,18 +272,14 @@ SNES_FTYPE determine_filetype(char* filename) {
     ) {
     return TYPE_SMC;
   }
-  if(  (!strcasecmp(ext+1, "IPS"))
+/*  if(  (!strcasecmp(ext+1, "IPS"))
      ||(!strcasecmp(ext+1, "UPS"))
     ) {
     return TYPE_IPS;
-  }
-  /* later
-  if(!strcasecmp_P(ext+1, PSTR("SRM"))) {
-    return TYPE_SRM;
-  }
-  if(!strcasecmp_P(ext+1, PSTR("SPC"))) {
-    return TYPE_SPC;
   }*/
+  if(!strcasecmp(ext+1, "SPC")) {
+    return TYPE_SPC;
+  }
   return TYPE_UNKNOWN;
 }
 
diff --git a/src/main.c b/src/main.c
index dcc8487..2ac0934 100644
--- a/src/main.c
+++ b/src/main.c
@@ -265,6 +265,21 @@ printf("PCONP=%lx\n", LPC_SC->PCONP);
           sysinfo_loop();
           cmd=0; /* stay in menu loop */
           break;
+        case SNES_CMD_LOADSPC:
+          /* load SPC file */
+          get_selected_name(file_lfn);
+          printf("Selected name: %s\n", file_lfn);
+          filesize = load_spc(file_lfn, SRAM_SPC_DATA_ADDR, SRAM_SPC_HEADER_ADDR);
+          cmd=0; /* stay in menu loop */
+          break;
+        case SNES_CMD_RESET:
+          /* process RESET request from SNES */
+          printf("RESET requested by SNES\n");
+          snes_reset(1);
+          sleep_ms(1);
+          snes_reset(0);
+          cmd=0; /* stay in menu loop */
+          break;
         case SNES_CMD_LOADLAST:
           cfg_get_last_game(file_lfn);
           printf("Selected name: %s\n", file_lfn);
diff --git a/src/memory.c b/src/memory.c
index 313af4a..bce7a0f 100644
--- a/src/memory.c
+++ b/src/memory.c
@@ -299,6 +299,71 @@ uint32_t load_rom(uint8_t* filename, uint32_t base_addr, uint8_t flags) {
   return (uint32_t)filesize;
 }
 
+uint32_t load_spc(uint8_t* filename, uint32_t spc_data_addr, uint32_t spc_header_addr) {
+  DWORD filesize;
+  UINT bytes_read;
+  uint8_t data;
+  UINT j;
+
+  printf("%s\n", filename);
+
+  file_open(filename, FA_READ); /* Open SPC file */
+  if(file_res) return 0;
+  filesize = file_handle.fsize;
+  if (filesize < 65920) { /*  At this point, we care about filesize only */
+    file_close();         /* since SNES decides if it is an SPC file */
+    sram_writebyte(0, spc_header_addr);	/* If file is too small, destroy previous SPC header */
+    return 0;
+  }
+
+  set_mcu_addr(spc_data_addr);
+  f_lseek(&file_handle, 0x100L); /* Load 64K data segment */
+
+  for(;;) {
+    bytes_read = file_read();
+    if (file_res || !bytes_read) break;
+    FPGA_SELECT();
+    FPGA_TX_BYTE(0x98);
+    for(j=0; j<bytes_read; j++) {
+      FPGA_TX_BYTE(file_buf[j]);
+      FPGA_WAIT_RDY();
+    }
+    FPGA_DESELECT();
+  }
+
+  file_close();
+  file_open(filename, FA_READ); /* Reopen SPC file to reset file_getc state*/
+
+  set_mcu_addr(spc_header_addr);
+  f_lseek(&file_handle, 0x0L); /* Load 256 bytes header */
+
+  FPGA_SELECT();
+  FPGA_TX_BYTE(0x98);
+  for (j = 0; j < 256; j++) {
+    data = file_getc();
+    FPGA_TX_BYTE(data);
+    FPGA_WAIT_RDY();
+  }
+  FPGA_DESELECT();
+
+  file_close();
+  file_open(filename, FA_READ); /* Reopen SPC file to reset file_getc state*/
+
+  set_mcu_addr(spc_header_addr+0x100);
+  f_lseek(&file_handle, 0x10100L); /* Load 128 DSP registers */
+
+  FPGA_SELECT();
+  FPGA_TX_BYTE(0x98);
+  for (j = 0; j < 128; j++) {
+    data = file_getc();
+    FPGA_TX_BYTE(data);
+    FPGA_WAIT_RDY();
+  }
+  FPGA_DESELECT();
+  file_close(); /* Done ! */
+  return (uint32_t)filesize;
+}
+
 uint32_t load_sram_offload(uint8_t* filename, uint32_t base_addr) {
   set_mcu_addr(base_addr);
   UINT bytes_read;
diff --git a/src/memory.h b/src/memory.h
index c2062d9..b5805cf 100644
--- a/src/memory.h
+++ b/src/memory.h
@@ -34,14 +34,18 @@
 #define SRAM_SAVE_ADDR          (0xE00000L)
 
 #define SRAM_MENU_ADDR          (0xE00000L)
-#define SRAM_DB_ADDR            (0xE40000L)
 #define SRAM_DIR_ADDR           (0xE10000L)
+#define SRAM_DB_ADDR            (0xE40000L)
+
+#define SRAM_SPC_DATA_ADDR      (0xFD0000L)
+#define SRAM_SPC_HEADER_ADDR    (0xFE0000L)
+
+#define SRAM_MENU_SAVE_ADDR     (0xFF0000L)
 #define SRAM_CMD_ADDR           (0xFF1000L)
 #define SRAM_PARAM_ADDR         (0xFF1004L)
 #define SRAM_STATUS_ADDR        (0xFF1100L)
 #define SRAM_SYSINFO_ADDR       (0xFF1200L)
 #define SRAM_LASTGAME_ADDR      (0xFF1420L)
-#define SRAM_MENU_SAVE_ADDR     (0xFF0000L)
 #define SRAM_SCRATCHPAD         (0xFFFF00L)
 #define SRAM_DIRID              (0xFFFFF0L)
 #define SRAM_RELIABILITY_SCORE  (0x100)
@@ -50,6 +54,7 @@
 #define LOADROM_WITH_RESET	(2)
 
 uint32_t load_rom(uint8_t* filename, uint32_t base_addr, uint8_t flags);
+uint32_t load_spc(uint8_t* filename, uint32_t spc_data_addr, uint32_t spc_header_addr);
 uint32_t load_sram(uint8_t* filename, uint32_t base_addr);
 uint32_t load_sram_offload(uint8_t* filename, uint32_t base_addr);
 uint32_t load_sram_rle(uint8_t* filename, uint32_t base_addr);
diff --git a/src/snes.h b/src/snes.h
index 35a6c11..4c04289 100644
--- a/src/snes.h
+++ b/src/snes.h
@@ -31,10 +31,12 @@
 #define SNES_CMD_SETRTC    (2)
 #define SNES_CMD_SYSINFO   (3)
 #define SNES_CMD_LOADLAST  (4)
+#define SNES_CMD_LOADSPC   (5)
+#define SNES_CMD_RESET     (6)
 
-#define MENU_ERR_OK		(0)
-#define MENU_ERR_NODSP	(1)
-#define MENU_ERR_NOBSX	(2)
+#define MENU_ERR_OK     (0)
+#define MENU_ERR_NODSP  (1)
+#define MENU_ERR_NOBSX  (2)
 
 uint8_t crc_valid;