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os/drivers/i386/ide.c

212 lines
6.5 KiB
C
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#include "../../fs/devfs.h"
#include "../../cpu/i386/ports.h"
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <klog.h>
#define IDE_PRIM_IO 0x1f0
#define IDE_PRIM_CTRL 0x3f6
#define IDE_SEC_IO 0x170
#define IDE_SEC_CTRL 0x376
static uint8_t ident[4][512];
static uint8_t* sect_data=NULL;
static uint32_t last_read_sector=0;
static uint8_t* read_sect(int base,int slave,int lba) {
if (last_read_sector==lba && sect_data) {
return sect_data;
}
port_byte_out(base+6,0xe0|slave<<4|((lba&0xFF000000)>>24));
for (int i=0;i<4;i++) port_byte_in(7);
while ((port_byte_in(base+7)&0x80)!=0);
port_byte_out(base+2,1);
port_byte_out(base+3,lba&0xFF);
port_byte_out(base+4,(lba&0xFF00)>>8);
port_byte_out(base+5,(lba&0xFF0000)>>16);
port_byte_out(base+7,0x20);
uint8_t* sect=malloc(sizeof(uint8_t)*512);
while ((port_byte_in(base+7)&0x88)!=0x8);
for (int i=0;i<512;i+=2) {
uint16_t data=port_word_in(base);
sect[i]=data&0xFF;
sect[i+1]=(data&0xFF00)>>8;
}
last_read_sector=lba;
// if (sect_data) {
// free(sect_data);
// }
sect_data=sect;
return sect;
}
static void write_sect(int base,int slave,int lba,uint8_t* sect) {
if (last_read_sector==lba) {
sect_data=sect;
}
if (!sect_data) {
last_read_sector=lba;
sect_data=sect;
}
port_byte_out(base+6,0xe0|slave<<4|(lba&0xFF000000>>24));
for (int i=0;i<4;i++) port_byte_in(base+7);
while ((port_byte_in(base+7)&0x80)!=0);
port_byte_out(base+2,1);
port_byte_out(base+3,lba&0xFF);
port_byte_out(base+4,lba&0xFF00>>8);
port_byte_out(base+5,lba&0xFF0000>>16);
port_byte_out(base+7,0x30);
while ((port_byte_in(base+7)&0x88)!=0x8);
for (int i=0;i<512;i+=2) {
port_word_out(base,sect[i]|(sect[i+1]<<8));
}
while ((port_byte_in(base+7)&0x80)!=0);
port_byte_out(base+7,0xE7);
}
static int drv(char* filename,int c,long pos,char wr) {
int base;
int slave;
if (strcmp(filename,"hda")==0) {
base=IDE_PRIM_IO;
slave=0;
}
if (strcmp(filename,"hdb")==0) {
base=IDE_PRIM_IO;
slave=1;
}
if (strcmp(filename,"hdc")==0) {
base=IDE_SEC_IO;
slave=0;
}
if (strcmp(filename,"hdc")==0) {
base=IDE_SEC_IO;
slave=1;
}
if (wr) {
int lba=pos/512;
int offset=pos%512;
uint8_t* sect=read_sect(base,slave,lba);
sect[offset]=(uint8_t)c;
write_sect(base,slave,lba,sect);
return 0;
} else {
int lba=pos/512;
int offset=pos%512;
uint8_t* sect=read_sect(base,slave,lba);
uint8_t val=sect[offset];
return val;
}
}
void ide_init() {
if (port_byte_in(IDE_PRIM_IO+7)!=0xFF) {
//Detect primary master
port_byte_out(IDE_PRIM_IO+6,0xe0);
for (int i=0;i<4;i++) port_byte_in(IDE_PRIM_IO+7);
while ((port_byte_in(IDE_PRIM_IO+7)&0x80)!=0);
port_byte_out(IDE_PRIM_IO+2,0);
port_byte_out(IDE_PRIM_IO+3,0);
port_byte_out(IDE_PRIM_IO+4,0);
port_byte_out(IDE_PRIM_IO+5,0);
port_byte_out(IDE_PRIM_IO+7,0xEC);
if (port_byte_in(IDE_PRIM_IO+7)!=0) {
uint8_t io4=port_byte_in(IDE_PRIM_IO+4);
uint8_t io5=port_byte_in(IDE_PRIM_IO+5);
if (io4==0x14&&io5==0xeb) {
klog("INFO","IDE primary master is ATAPI");
}
if (io4==0x3c&&io5==0xc3) {
klog("INFO","IDE primary master is SATA");
}
if (io4==0&&io5==0) {
while ((port_byte_in(IDE_PRIM_IO+7)&0x8)!=0x8);
for (int i=0;i<512;i+=2) {
uint16_t data=port_word_in(IDE_PRIM_IO);
ident[0][i]=data&0xFF;
ident[0][i+1]=(data&0xFF00)>>8;
}
klog("INFO","Found IDE primary master");
port_byte_out(IDE_PRIM_CTRL,port_byte_in(IDE_PRIM_CTRL)|0x2);
devfs_add(drv,"hda");
}
}
//Detect primary slave
port_byte_out(IDE_PRIM_IO+6,0xf0);
for (int i=0;i<4;i++) port_byte_in(IDE_PRIM_IO+7);
while ((port_byte_in(IDE_PRIM_IO+7)&0x80)!=0);
port_byte_out(IDE_PRIM_IO+2,0);
port_byte_out(IDE_PRIM_IO+3,0);
port_byte_out(IDE_PRIM_IO+4,0);
port_byte_out(IDE_PRIM_IO+5,0);
port_byte_out(IDE_PRIM_IO+7,0xEC);
if (port_byte_in(IDE_PRIM_IO+7)!=0) {
uint8_t io4=port_byte_in(IDE_PRIM_IO+4);
uint8_t io5=port_byte_in(IDE_PRIM_IO+5);
if (io4==0x14&&io5==0xeb) {
klog("INFO","IDE primary slave is ATAPI");
}
if (io4==0x3c&&io5==0xc3) {
klog("INFO","IDE primary slave is SATA");
}
if (io4==0&&io5==0) {
while ((port_byte_in(IDE_PRIM_IO+7)&0x8)!=0x8);
for (int i=0;i<512;i+=2) {
uint16_t data=port_word_in(IDE_PRIM_IO);
ident[0][i]=data&0xFF;
ident[0][i+1]=(data&0xFF00)>>8;
}
klog("INFO","Found IDE primary slave");
port_byte_out(IDE_PRIM_CTRL,port_byte_in(0x3f6)|0x2);
devfs_add(drv,"hdb");
}
}
}
// if (port_byte_in(IDE_SEC_IO+7)!=0xFF) {
// //Detect secondary master
// port_byte_out(IDE_SEC_IO+6,0xe0);
// for (int i=0;i<4;i++) port_byte_in(IDE_SEC_IO+7);
// while ((port_byte_in(IDE_SEC_IO+7)&0x80)!=0);
// port_byte_out(IDE_SEC_IO+2,0);
// port_byte_out(IDE_SEC_IO+3,0);
// port_byte_out(IDE_SEC_IO+4,0);
// port_byte_out(IDE_SEC_IO+5,0);
// port_byte_out(IDE_SEC_IO+7,0xEC);
// if (port_byte_in(IDE_SEC_IO+7)!=0) {
// if (port_byte_in(IDE_SEC_IO+5)!=0&&port_byte_in(IDE_SEC_IO+6)!=0) {
// }
// while ((port_byte_in(IDE_SEC_IO+7)&0x8)!=0x8);
// for (int i=0;i<512;i+=2) {
// uint16_t data=port_word_in(IDE_SEC_IO);
// ident[0][i]=data&0xFF;
// ident[0][i+1]=(data&0xFF00)>>8;
// }
// klog("INFO","Found IDE secondary master");
// port_byte_out(IDE_SEC_CTRL,port_byte_in(IDE_SEC_CTRL)|0x2);
// devfs_add(drv,"hdc");
// }
// //Detect secondary slave
// port_byte_out(IDE_SEC_IO+6,0xf0);
// for (int i=0;i<4;i++) port_byte_in(IDE_SEC_IO+7);
// while ((port_byte_in(IDE_SEC_IO+7)&0x80)!=0);
// port_byte_out(IDE_SEC_IO+2,0);
// port_byte_out(IDE_SEC_IO+3,0);
// port_byte_out(IDE_SEC_IO+4,0);
// port_byte_out(IDE_SEC_IO+5,0);
// port_byte_out(IDE_SEC_IO+7,0xEC);
// if (port_byte_in(IDE_SEC_IO+7)!=0) {
// if (port_byte_in(IDE_SEC_IO+5)!=0&&port_byte_in(IDE_SEC_IO+6)!=0) {
// }
// while ((port_byte_in(IDE_SEC_IO+7)&0x8)!=0x8);
// for (int i=0;i<512;i+=2) {
// uint16_t data=port_word_in(IDE_SEC_IO);
// ident[0][i]=data&0xFF;
// ident[0][i+1]=(data&0xFF00)>>8;
// }
// klog("INFO","Found IDE decondaryary slave");
// port_byte_out(IDE_SEC_CTRL,port_byte_in(IDE_SEC_CTRL)|0x2);
// devfs_add(drv,"hdd");
// }
// }
}
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