cleanup code
This commit is contained in:
david
@@ -1,199 +1,199 @@
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#include "integer.h"
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#include "diskio.h"
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#include "config.h"
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#include "data.h"
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#include "debug.h"
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/* Interface
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** Scratch Buffer
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addr 3 byte
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size 1 byte
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** Call Interface
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cmd 1 byte
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sector 4 bytes
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count 1 byte
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return 1 byte
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** Commands
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* disk_init
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* disk_read
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* disk_write
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*/
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/*-----------------------------------------------------------------------*/
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/* Initialize Disk Drive */
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/*-----------------------------------------------------------------------*/
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#include <string.h>
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// TODO: Figure out gobal vars ?!?
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DSTATUS Stat = 0 ; //STA_NOINIT; /* Disk status */
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DSTATUS disk_initialize (BYTE drv) {
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byte retval;
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_initialize called drv=%i stat=%i\n",drv,Stat);
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#endif
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if (drv) return STA_NOINIT; /* Supports only single drive */
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Stat |= STA_NOINIT;
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_initialize stat=%i\n",Stat);
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#endif
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*(byte*) MMIO_RETVAL = STA_VOID;
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*(byte*) MMIO_CMD = CMD_INIT;
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_initialize poll retval\n");
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#endif
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while((retval = *(byte*) MMIO_RETVAL) == STA_VOID);
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Stat &= ~STA_NOINIT; /* When device goes ready, clear STA_NOINIT */
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_initialize done Stat=%i\n",Stat);
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#endif
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return Stat;
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}
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/*-----------------------------------------------------------------------*/
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/* Return Disk Status */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_status (BYTE drv){
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if (drv) return STA_NOINIT; /* Supports only single drive */
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return Stat;
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}
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/*-----------------------------------------------------------------------*/
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/* Read Sector(s) */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_read (
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BYTE drv, /* Physical drive nmuber (0) */
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BYTE *buff, /* Data buffer to store read data */
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DWORD sector, /* Sector number (LBA) */
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BYTE count /* Sector count (1..255) */
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)
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{
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DWORD offset;
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INT size;
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byte retval;
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word i;
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//#ifdef MMIO_DEBUG
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printfc("SNES::disk_read called sector=%li count=%i\n",sector,count);
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//#endif
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if (drv || !count) return RES_PARERR;
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_read drv ok\n");
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#endif
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if (Stat & STA_NOINIT) return RES_NOTRDY;
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_read sta ok\n");
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#endif
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*(byte*) MMIO_RETVAL = STA_VOID;
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*(byte*) MMIO_CMD = CMD_READ;
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*(byte*) MMIO_SECTOR01 = (sector >> 24) & 0xff;
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*(byte*) MMIO_SECTOR02 = (sector >> 16) & 0xff;
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*(byte*) MMIO_SECTOR03 = (sector >> 8) & 0xff;
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*(byte*) MMIO_SECTOR04 = (sector) & 0xff;
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*(byte*) MMIO_COUNT = count;
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_read poll retval\n");
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#endif
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while((retval = *(byte*) MMIO_RETVAL) == STA_VOID);
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_read copy buffer to %06lx\n",SHARED_ADDR);
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#endif
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for (i=0;i<(count*512);i++){
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buff[i] = *(byte*)(SHARED_ADDR+i);
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#ifdef MMIO_DEBUG
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if ( i < 8)
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printfc("0x%02x ",buff[i]);
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#endif
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}
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#ifdef MMIO_DEBUG
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printfc("\n");
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#endif
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return retval;
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}
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/*-----------------------------------------------------------------------*/
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/* Write Sector(s) */
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/*-----------------------------------------------------------------------*/
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#if _READONLY == 0
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DRESULT disk_write (
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BYTE drv, /* Physical drive nmuber (0) */
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const BYTE *buff, /* Data to be written */
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DWORD sector, /* Sector number (LBA) */
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BYTE count /* Sector count (1..255) */
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)
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{
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DWORD offset;
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INT size;
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if (drv || !count) return RES_PARERR;
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if (Stat & STA_NOINIT) return RES_NOTRDY;
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offset = sector * 512;
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size = count * 512;
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return RES_OK;
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}
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#endif /* _READONLY */
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/*-----------------------------------------------------------------------*/
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/* Miscellaneous Functions */
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/*-----------------------------------------------------------------------*/
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#if _USE_IOCTL != 0
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DRESULT disk_ioctl (
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BYTE drv, /* Physical drive nmuber (0) */
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BYTE ctrl, /* Control code */
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void *buff /* Buffer to send/receive data block */
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)
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{
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BYTE n, w, ofs, dl, dh, *ptr = (BYTE*)buff;
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if (drv) return RES_PARERR;
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if (Stat & STA_NOINIT) return RES_NOTRDY;
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switch (ctrl) {
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case GET_SECTOR_COUNT : /* Get number of sectors on the disk (DWORD) */
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ofs = 60; w = 2; n = 0;
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break;
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case GET_SECTOR_SIZE : /* Get sectors on the disk (WORD) */
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*(WORD*)buff = 512;
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return RES_OK;
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case GET_BLOCK_SIZE : /* Get erase block size in sectors (DWORD) */
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*(DWORD*)buff = 32;
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return RES_OK;
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default:
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return RES_PARERR;
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}
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return RES_OK;
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}
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#endif /* _USE_IOCTL != 0 */
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#include "integer.h"
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#include "diskio.h"
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#include "config.h"
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#include "data.h"
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#include "debug.h"
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/* Interface
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** Scratch Buffer
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addr 3 byte
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size 1 byte
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** Call Interface
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cmd 1 byte
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sector 4 bytes
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count 1 byte
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return 1 byte
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** Commands
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* disk_init
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* disk_read
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* disk_write
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*/
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/*-----------------------------------------------------------------------*/
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/* Initialize Disk Drive */
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/*-----------------------------------------------------------------------*/
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#include <string.h>
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// TODO: Figure out gobal vars ?!?
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DSTATUS Stat = 0 ; //STA_NOINIT; /* Disk status */
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DSTATUS disk_initialize (BYTE drv) {
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byte retval;
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_initialize called drv=%i stat=%i\n",drv,Stat);
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#endif
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if (drv) return STA_NOINIT; /* Supports only single drive */
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Stat |= STA_NOINIT;
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_initialize stat=%i\n",Stat);
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#endif
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*(byte*) MMIO_RETVAL = STA_VOID;
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*(byte*) MMIO_CMD = CMD_INIT;
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_initialize poll retval\n");
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#endif
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while((retval = *(byte*) MMIO_RETVAL) == STA_VOID);
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Stat &= ~STA_NOINIT; /* When device goes ready, clear STA_NOINIT */
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_initialize done Stat=%i\n",Stat);
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#endif
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return Stat;
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}
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/*-----------------------------------------------------------------------*/
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/* Return Disk Status */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_status (BYTE drv){
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if (drv) return STA_NOINIT; /* Supports only single drive */
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return Stat;
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}
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/*-----------------------------------------------------------------------*/
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/* Read Sector(s) */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_read (
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BYTE drv, /* Physical drive nmuber (0) */
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BYTE *buff, /* Data buffer to store read data */
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DWORD sector, /* Sector number (LBA) */
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BYTE count /* Sector count (1..255) */
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)
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{
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DWORD offset;
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INT size;
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byte retval;
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word i;
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//#ifdef MMIO_DEBUG
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printfc("SNES::disk_read called sector=%li count=%i\n",sector,count);
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//#endif
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if (drv || !count) return RES_PARERR;
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_read drv ok\n");
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#endif
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if (Stat & STA_NOINIT) return RES_NOTRDY;
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_read sta ok\n");
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#endif
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*(byte*) MMIO_RETVAL = STA_VOID;
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*(byte*) MMIO_CMD = CMD_READ;
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*(byte*) MMIO_SECTOR01 = (sector >> 24) & 0xff;
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*(byte*) MMIO_SECTOR02 = (sector >> 16) & 0xff;
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*(byte*) MMIO_SECTOR03 = (sector >> 8) & 0xff;
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*(byte*) MMIO_SECTOR04 = (sector) & 0xff;
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*(byte*) MMIO_COUNT = count;
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_read poll retval\n");
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#endif
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while((retval = *(byte*) MMIO_RETVAL) == STA_VOID);
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#ifdef MMIO_DEBUG
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printfc("SNES::disk_read copy buffer to %06lx\n",SHARED_ADDR);
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#endif
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for (i=0;i<(count*512);i++){
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buff[i] = *(byte*)(SHARED_ADDR+i);
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#ifdef MMIO_DEBUG
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if ( i < 8)
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printfc("0x%02x ",buff[i]);
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#endif
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}
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#ifdef MMIO_DEBUG
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printfc("\n");
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#endif
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return retval;
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}
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/*-----------------------------------------------------------------------*/
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/* Write Sector(s) */
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/*-----------------------------------------------------------------------*/
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#if _READONLY == 0
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DRESULT disk_write (
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BYTE drv, /* Physical drive nmuber (0) */
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const BYTE *buff, /* Data to be written */
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DWORD sector, /* Sector number (LBA) */
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BYTE count /* Sector count (1..255) */
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)
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{
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DWORD offset;
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INT size;
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if (drv || !count) return RES_PARERR;
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if (Stat & STA_NOINIT) return RES_NOTRDY;
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offset = sector * 512;
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size = count * 512;
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return RES_OK;
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}
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#endif /* _READONLY */
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/*-----------------------------------------------------------------------*/
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/* Miscellaneous Functions */
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/*-----------------------------------------------------------------------*/
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#if _USE_IOCTL != 0
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DRESULT disk_ioctl (
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BYTE drv, /* Physical drive nmuber (0) */
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BYTE ctrl, /* Control code */
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void *buff /* Buffer to send/receive data block */
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)
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{
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BYTE n, w, ofs, dl, dh, *ptr = (BYTE*)buff;
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if (drv) return RES_PARERR;
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if (Stat & STA_NOINIT) return RES_NOTRDY;
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switch (ctrl) {
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case GET_SECTOR_COUNT : /* Get number of sectors on the disk (DWORD) */
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ofs = 60; w = 2; n = 0;
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break;
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case GET_SECTOR_SIZE : /* Get sectors on the disk (WORD) */
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*(WORD*)buff = 512;
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return RES_OK;
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case GET_BLOCK_SIZE : /* Get erase block size in sectors (DWORD) */
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*(DWORD*)buff = 32;
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return RES_OK;
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default:
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return RES_PARERR;
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}
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return RES_OK;
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}
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#endif /* _USE_IOCTL != 0 */
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