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https://github.com/encounter/osdev.git
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Luke Street
93 lines
3.5 KiB
C
93 lines
3.5 KiB
C
/*-----------------------------------------------------------------------*/
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/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2016 */
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/*-----------------------------------------------------------------------*/
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/* If a working storage control module is available, it should be */
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/* attached to the FatFs via a glue function rather than modifying it. */
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/* This is an example of glue functions to attach various exsisting */
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/* storage control modules to the FatFs module with a defined API. */
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/*-----------------------------------------------------------------------*/
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#include "diskio.h" /* FatFs lower layer API */
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#include "../drivers/ata.h"
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#include <stdio.h>
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/*-----------------------------------------------------------------------*/
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/* Get Drive Status */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_status(
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BYTE pdrv /* Physical drive nmuber to identify the drive */
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) {
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if (pdrv < 3 && ide_devices[pdrv].reserved) {
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return 0;
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}
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return STA_NODISK;
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}
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/*-----------------------------------------------------------------------*/
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/* Inidialize a Drive */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_initialize(
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BYTE pdrv /* Physical drive nmuber to identify the drive */
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) {
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if (pdrv < 3 && ide_devices[pdrv].reserved) {
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return 0;
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}
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return STA_NODISK;
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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 pdrv, /* Physical drive nmuber to identify the drive */
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BYTE *buff, /* Data buffer to store read data */
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DWORD sector, /* Start sector in LBA */
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UINT count /* Number of sectors to read */
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) {
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if (pdrv < 3 && ide_devices[pdrv].reserved) {
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if (ide_ata_access(0, pdrv, sector, (uint8_t) count, 0, (uintptr_t) buff)) {
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return RES_ERROR;
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}
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return RES_OK;
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}
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return RES_PARERR;
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}
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/*-----------------------------------------------------------------------*/
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/* Write Sector(s) */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_write(
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BYTE pdrv, /* Physical drive nmuber to identify the drive */
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const BYTE *buff, /* Data to be written */
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DWORD sector, /* Start sector in LBA */
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UINT count /* Number of sectors to write */
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) {
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if (pdrv < 3 && ide_devices[pdrv].reserved) {
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if (ide_ata_access(1, pdrv, sector, (uint8_t) count, 0, (uintptr_t) buff)) {
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return RES_ERROR;
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}
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return RES_OK;
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}
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return RES_WRPRT;
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}
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/*-----------------------------------------------------------------------*/
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/* Miscellaneous Functions */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_ioctl(
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BYTE pdrv, /* Physical drive nmuber (0..) */
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BYTE cmd, /* Control code */
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void *buff /* Buffer to send/receive control data */
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) {
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// TODO
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// printf("disk_ioctl: unimplemented %d\n", pdrv);
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return RES_OK;
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}
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