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// Low level ATA disk access
//
// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2002 MandrakeSoft S.A.
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#include "ata.h" // ATA_*
#include "types.h" // u8
#include "ioport.h" // inb
#include "util.h" // BX_INFO
#include "cmos.h" // inb_cmos
#define TIMEOUT 0
#define BSY 1
#define NOT_BSY 2
#define NOT_BSY_DRQ 3
#define NOT_BSY_NOT_DRQ 4
#define NOT_BSY_RDY 5
#define IDE_TIMEOUT 32000u //32 seconds max for IDE ops
#define BX_DEBUG_ATA BX_INFO
// XXX - lots of redundancy in this file.
static int
await_ide(u8 when_done, u16 base, u16 timeout)
{
u32 time=0,last=0;
// for the times you're supposed to throw one away
u16 status = inb(base + ATA_CB_STAT);
for (;;) {
status = inb(base+ATA_CB_STAT);
time++;
u8 result;
if (when_done == BSY)
result = status & ATA_CB_STAT_BSY;
else if (when_done == NOT_BSY)
result = !(status & ATA_CB_STAT_BSY);
else if (when_done == NOT_BSY_DRQ)
result = !(status & ATA_CB_STAT_BSY) && (status & ATA_CB_STAT_DRQ);
else if (when_done == NOT_BSY_NOT_DRQ)
result = !(status & ATA_CB_STAT_BSY) && !(status & ATA_CB_STAT_DRQ);
else if (when_done == NOT_BSY_RDY)
result = !(status & ATA_CB_STAT_BSY) && (status & ATA_CB_STAT_RDY);
else if (when_done == TIMEOUT)
result = 0;
if (result)
return 0;
// mod 2048 each 16 ms
if (time>>16 != last) {
last = time >>16;
BX_DEBUG_ATA("await_ide: (TIMEOUT,BSY,!BSY,!BSY_DRQ,!BSY_!DRQ,!BSY_RDY) %d time= %d timeout= %d\n",when_done,time>>11, timeout);
}
if (status & ATA_CB_STAT_ERR) {
BX_DEBUG_ATA("await_ide: ERROR (TIMEOUT,BSY,!BSY,!BSY_DRQ,!BSY_!DRQ,!BSY_RDY) %d time= %d timeout= %d\n",when_done,time>>11, timeout);
return -1;
}
if ((timeout == 0) || ((time>>11) > timeout))
break;
}
BX_INFO("IDE time out\n");
return -1;
}
// ---------------------------------------------------------------------------
// ATA/ATAPI driver : software reset
// ---------------------------------------------------------------------------
// ATA-3
// 8.2.1 Software reset - Device 0
void
ata_reset(u16 device)
{
u16 iobase1, iobase2;
u8 channel, slave, sn, sc;
u8 type;
channel = device / 2;
slave = device % 2;
iobase1 = GET_EBDA(ata.channels[channel].iobase1);
iobase2 = GET_EBDA(ata.channels[channel].iobase2);
// Reset
// 8.2.1 (a) -- set SRST in DC
outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN | ATA_CB_DC_SRST, iobase2+ATA_CB_DC);
// 8.2.1 (b) -- wait for BSY
await_ide(BSY, iobase1, 20);
// 8.2.1 (f) -- clear SRST
outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC);
type=GET_EBDA(ata.devices[device].type);
if (type != ATA_TYPE_NONE) {
// 8.2.1 (g) -- check for sc==sn==0x01
// select device
outb(slave?ATA_CB_DH_DEV1:ATA_CB_DH_DEV0, iobase1+ATA_CB_DH);
sc = inb(iobase1+ATA_CB_SC);
sn = inb(iobase1+ATA_CB_SN);
if ( (sc==0x01) && (sn==0x01) ) {
if (type == ATA_TYPE_ATA) //ATA
await_ide(NOT_BSY_RDY, iobase1, IDE_TIMEOUT);
else //ATAPI
await_ide(NOT_BSY, iobase1, IDE_TIMEOUT);
}
// 8.2.1 (h) -- wait for not BSY
await_ide(NOT_BSY, iobase1, IDE_TIMEOUT);
}
// Enable interrupts
outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
}
static void
insw(u16 port, u16 segment, u16 offset, u16 count)
{
u16 i;
for (i=0; i<count; i++) {
u16 d = inw(port);
SET_FARVAR(segment, *(u16*)(offset + 2*i), d);
}
}
static void
insl(u16 port, u16 segment, u16 offset, u16 count)
{
u16 i;
for (i=0; i<count; i++) {
u32 d = inl(port);
SET_FARVAR(segment, *(u32*)(offset + 4*i), d);
}
}
static void
outsw(u16 port, u16 segment, u16 offset, u16 count)
{
u16 i;
for (i=0; i<count; i++) {
u16 d = GET_FARVAR(segment, *(u16*)(offset + 2*i));
outw(d, port);
}
}
static void
outsl(u16 port, u16 segment, u16 offset, u16 count)
{
u16 i;
for (i=0; i<count; i++) {
u32 d = GET_FARVAR(segment, *(u32*)(offset + 4*i));
outl(d, port);
}
}
// ---------------------------------------------------------------------------
// ATA/ATAPI driver : execute a data-in command
// ---------------------------------------------------------------------------
// returns
// 0 : no error
// 1 : BUSY bit set
// 2 : read error
// 3 : expected DRQ=1
// 4 : no sectors left to read/verify
// 5 : more sectors to read/verify
// 6 : no sectors left to write
// 7 : more sectors to write
u16
ata_cmd_data_in(u16 device, u16 command, u16 count, u16 cylinder
, u16 head, u16 sector, u32 lba, u16 segment, u16 offset)
{
u16 iobase1, iobase2, blksize;
u8 channel, slave;
u8 status, current, mode;
channel = device / 2;
slave = device % 2;
iobase1 = GET_EBDA(ata.channels[channel].iobase1);
iobase2 = GET_EBDA(ata.channels[channel].iobase2);
mode = GET_EBDA(ata.devices[device].mode);
blksize = 0x200;
if (mode == ATA_MODE_PIO32)
blksize>>=2;
else
blksize>>=1;
// Reset count of transferred data
SET_EBDA(ata.trsfsectors,0);
SET_EBDA(ata.trsfbytes,0L);
current = 0;
status = inb(iobase1 + ATA_CB_STAT);
if (status & ATA_CB_STAT_BSY)
return 1;
outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
// sector will be 0 only on lba access. Convert to lba-chs
if (sector == 0) {
if ((count >= 1 << 8) || (lba + count >= 1UL << 28)) {
outb(0x00, iobase1 + ATA_CB_FR);
outb((count >> 8) & 0xff, iobase1 + ATA_CB_SC);
outb(lba >> 24, iobase1 + ATA_CB_SN);
outb(0, iobase1 + ATA_CB_CL);
outb(0, iobase1 + ATA_CB_CH);
command |= 0x04;
count &= (1UL << 8) - 1;
lba &= (1UL << 24) - 1;
}
sector = (u16) (lba & 0x000000ffL);
cylinder = (u16) ((lba>>8) & 0x0000ffffL);
head = ((u16) ((lba>>24) & 0x0000000fL)) | ATA_CB_DH_LBA;
}
outb(0x00, iobase1 + ATA_CB_FR);
outb(count, iobase1 + ATA_CB_SC);
outb(sector, iobase1 + ATA_CB_SN);
outb(cylinder & 0x00ff, iobase1 + ATA_CB_CL);
outb(cylinder >> 8, iobase1 + ATA_CB_CH);
outb((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0) | (u8) head
, iobase1 + ATA_CB_DH);
outb(command, iobase1 + ATA_CB_CMD);
await_ide(NOT_BSY_DRQ, iobase1, IDE_TIMEOUT);
status = inb(iobase1 + ATA_CB_STAT);
if (status & ATA_CB_STAT_ERR) {
BX_DEBUG_ATA("ata_cmd_data_in : read error\n");
return 2;
} else if ( !(status & ATA_CB_STAT_DRQ) ) {
BX_DEBUG_ATA("ata_cmd_data_in : DRQ not set (status %02x)\n"
, (unsigned) status);
return 3;
}
// FIXME : move seg/off translation here
irq_enable();
while (1) {
if (offset > 0xf800) {
offset -= 0x800;
segment += 0x80;
}
if (mode == ATA_MODE_PIO32)
insl(iobase1, segment, offset, blksize);
else
insw(iobase1, segment, offset, blksize);
current++;
SET_EBDA(ata.trsfsectors,current);
count--;
await_ide(NOT_BSY, iobase1, IDE_TIMEOUT);
status = inb(iobase1 + ATA_CB_STAT);
if (count == 0) {
if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ
| ATA_CB_STAT_ERR) )
!= ATA_CB_STAT_RDY ) {
BX_DEBUG_ATA("ata_cmd_data_in : no sectors left (status %02x)\n"
, (unsigned) status);
return 4;
}
break;
}
else {
if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ
| ATA_CB_STAT_ERR) )
!= (ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ) ) {
BX_DEBUG_ATA("ata_cmd_data_in : more sectors left (status %02x)\n"
, (unsigned) status);
return 5;
}
continue;
}
}
// Enable interrupts
outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
return 0;
}
// ---------------------------------------------------------------------------
// ATA/ATAPI driver : execute a data-out command
// ---------------------------------------------------------------------------
// returns
// 0 : no error
// 1 : BUSY bit set
// 2 : read error
// 3 : expected DRQ=1
// 4 : no sectors left to read/verify
// 5 : more sectors to read/verify
// 6 : no sectors left to write
// 7 : more sectors to write
u16
ata_cmd_data_out(u16 device, u16 command, u16 count, u16 cylinder
, u16 head, u16 sector, u32 lba, u16 segment, u16 offset)
{
u16 iobase1, iobase2, blksize;
u8 channel, slave;
u8 status, current, mode;
channel = device / 2;
slave = device % 2;
iobase1 = GET_EBDA(ata.channels[channel].iobase1);
iobase2 = GET_EBDA(ata.channels[channel].iobase2);
mode = GET_EBDA(ata.devices[device].mode);
blksize = 0x200;
if (mode == ATA_MODE_PIO32)
blksize>>=2;
else
blksize>>=1;
// Reset count of transferred data
SET_EBDA(ata.trsfsectors,0);
SET_EBDA(ata.trsfbytes,0L);
current = 0;
status = inb(iobase1 + ATA_CB_STAT);
if (status & ATA_CB_STAT_BSY)
return 1;
outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
// sector will be 0 only on lba access. Convert to lba-chs
if (sector == 0) {
if ((count >= 1 << 8) || (lba + count >= 1UL << 28)) {
outb(0x00, iobase1 + ATA_CB_FR);
outb((count >> 8) & 0xff, iobase1 + ATA_CB_SC);
outb(lba >> 24, iobase1 + ATA_CB_SN);
outb(0, iobase1 + ATA_CB_CL);
outb(0, iobase1 + ATA_CB_CH);
command |= 0x04;
count &= (1UL << 8) - 1;
lba &= (1UL << 24) - 1;
}
sector = (u16) (lba & 0x000000ffL);
cylinder = (u16) ((lba>>8) & 0x0000ffffL);
head = ((u16) ((lba>>24) & 0x0000000fL)) | ATA_CB_DH_LBA;
}
outb(0x00, iobase1 + ATA_CB_FR);
outb(count, iobase1 + ATA_CB_SC);
outb(sector, iobase1 + ATA_CB_SN);
outb(cylinder & 0x00ff, iobase1 + ATA_CB_CL);
outb(cylinder >> 8, iobase1 + ATA_CB_CH);
outb((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0) | (u8) head
, iobase1 + ATA_CB_DH);
outb(command, iobase1 + ATA_CB_CMD);
await_ide(NOT_BSY_DRQ, iobase1, IDE_TIMEOUT);
status = inb(iobase1 + ATA_CB_STAT);
if (status & ATA_CB_STAT_ERR) {
BX_DEBUG_ATA("ata_cmd_data_out : read error\n");
return 2;
} else if ( !(status & ATA_CB_STAT_DRQ) ) {
BX_DEBUG_ATA("ata_cmd_data_out : DRQ not set (status %02x)\n"
, (unsigned) status);
return 3;
}
// FIXME : move seg/off translation here
irq_enable();
while (1) {
if (offset > 0xf800) {
offset -= 0x800;
segment += 0x80;
}
if (mode == ATA_MODE_PIO32)
outsl(iobase1, segment, offset, blksize);
else
outsw(iobase1, segment, offset, blksize);
current++;
SET_EBDA(ata.trsfsectors,current);
count--;
status = inb(iobase1 + ATA_CB_STAT);
if (count == 0) {
if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DF
| ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR) )
!= ATA_CB_STAT_RDY ) {
BX_DEBUG_ATA("ata_cmd_data_out : no sectors left (status %02x)\n"
, (unsigned) status);
return 6;
}
break;
} else {
if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ
| ATA_CB_STAT_ERR) )
!= (ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ) ) {
BX_DEBUG_ATA("ata_cmd_data_out : more sectors left (status %02x)\n"
, (unsigned) status);
return 7;
}
continue;
}
}
// Enable interrupts
outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
return 0;
}
// ---------------------------------------------------------------------------
// ATA/ATAPI driver : execute a packet command
// ---------------------------------------------------------------------------
// returns
// 0 : no error
// 1 : error in parameters
// 2 : BUSY bit set
// 3 : error
// 4 : not ready
u16
ata_cmd_packet(u16 device, u8 cmdlen, u16 cmdseg, u16 cmdoff, u16 header
, u32 length, u8 inout, u16 bufseg, u16 bufoff)
{
u16 iobase1, iobase2;
u16 lcount, lbefore, lafter, count;
u8 channel, slave;
u8 status, mode, lmode;
u32 transfer;
channel = device / 2;
slave = device % 2;
// Data out is not supported yet
if (inout == ATA_DATA_OUT) {
BX_INFO("ata_cmd_packet: DATA_OUT not supported yet\n");
return 1;
}
// The header length must be even
if (header & 1) {
BX_DEBUG_ATA("ata_cmd_packet : header must be even (%04x)\n",header);
return 1;
}
iobase1 = GET_EBDA(ata.channels[channel].iobase1);
iobase2 = GET_EBDA(ata.channels[channel].iobase2);
mode = GET_EBDA(ata.devices[device].mode);
transfer= 0L;
if (cmdlen < 12)
cmdlen=12;
if (cmdlen > 12)
cmdlen=16;
cmdlen>>=1;
// Reset count of transferred data
SET_EBDA(ata.trsfsectors,0);
SET_EBDA(ata.trsfbytes,0L);
status = inb(iobase1 + ATA_CB_STAT);
if (status & ATA_CB_STAT_BSY)
return 2;
outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
outb(0x00, iobase1 + ATA_CB_FR);
outb(0x00, iobase1 + ATA_CB_SC);
outb(0x00, iobase1 + ATA_CB_SN);
outb(0xfff0 & 0x00ff, iobase1 + ATA_CB_CL);
outb(0xfff0 >> 8, iobase1 + ATA_CB_CH);
outb(slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0, iobase1 + ATA_CB_DH);
outb(ATA_CMD_PACKET, iobase1 + ATA_CB_CMD);
// Device should ok to receive command
await_ide(NOT_BSY_DRQ, iobase1, IDE_TIMEOUT);
status = inb(iobase1 + ATA_CB_STAT);
if (status & ATA_CB_STAT_ERR) {
BX_DEBUG_ATA("ata_cmd_packet : error, status is %02x\n",status);
return 3;
} else if ( !(status & ATA_CB_STAT_DRQ) ) {
BX_DEBUG_ATA("ata_cmd_packet : DRQ not set (status %02x)\n"
, (unsigned) status);
return 4;
}
// Normalize address
cmdseg += (cmdoff / 16);
cmdoff %= 16;
// Send command to device
irq_enable();
outsw(iobase1, cmdseg, cmdoff, cmdlen);
if (inout == ATA_DATA_NO) {
await_ide(NOT_BSY, iobase1, IDE_TIMEOUT);
status = inb(iobase1 + ATA_CB_STAT);
}
else {
u16 loops = 0;
u8 sc;
while (1) {
if (loops == 0) {//first time through
status = inb(iobase2 + ATA_CB_ASTAT);
await_ide(NOT_BSY_DRQ, iobase1, IDE_TIMEOUT);
}
else
await_ide(NOT_BSY, iobase1, IDE_TIMEOUT);
loops++;
status = inb(iobase1 + ATA_CB_STAT);
sc = inb(iobase1 + ATA_CB_SC);
// Check if command completed
if(((inb(iobase1 + ATA_CB_SC)&0x7)==0x3) &&
((status & (ATA_CB_STAT_RDY | ATA_CB_STAT_ERR)) == ATA_CB_STAT_RDY))
break;
if (status & ATA_CB_STAT_ERR) {
BX_DEBUG_ATA("ata_cmd_packet : error (status %02x)\n",status);
return 3;
}
// Normalize address
bufseg += (bufoff / 16);
bufoff %= 16;
// Get the byte count
lcount = ((u16)(inb(iobase1 + ATA_CB_CH))<<8)+inb(iobase1 + ATA_CB_CL);
// adjust to read what we want
if(header>lcount) {
lbefore=lcount;
header-=lcount;
lcount=0;
}
else {
lbefore=header;
header=0;
lcount-=lbefore;
}
if(lcount>length) {
lafter=lcount-length;
lcount=length;
length=0;
}
else {
lafter=0;
length-=lcount;
}
// Save byte count
count = lcount;
BX_DEBUG_ATA("Trying to read %04x bytes (%04x %04x %04x) "
,lbefore+lcount+lafter,lbefore,lcount,lafter);
BX_DEBUG_ATA("to 0x%04x:0x%04x\n",bufseg,bufoff);
// If counts not dividable by 4, use 16bits mode
lmode = mode;
if (lbefore & 0x03) lmode=ATA_MODE_PIO16;
if (lcount & 0x03) lmode=ATA_MODE_PIO16;
if (lafter & 0x03) lmode=ATA_MODE_PIO16;
// adds an extra byte if count are odd. before is always even
if (lcount & 0x01) {
lcount+=1;
if ((lafter > 0) && (lafter & 0x01)) {
lafter-=1;
}
}
if (lmode == ATA_MODE_PIO32) {
lcount>>=2; lbefore>>=2; lafter>>=2;
} else {
lcount>>=1; lbefore>>=1; lafter>>=1;
}
int i;
for (i=0; i<lbefore; i++)
if (lmode == ATA_MODE_PIO32)
inl(iobase1);
else
inw(iobase1);
if (lmode == ATA_MODE_PIO32)
insl(iobase1, bufoff, bufseg, lcount);
else
insw(iobase1, bufoff, bufseg, lcount);
for (i=0; i<lafter; i++)
if (lmode == ATA_MODE_PIO32)
inl(iobase1);
else
inw(iobase1);
// Compute new buffer address
bufoff += count;
// Save transferred bytes count
transfer += count;
SET_EBDA(ata.trsfbytes,transfer);
}
}
// Final check, device must be ready
if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DF
| ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR) )
!= ATA_CB_STAT_RDY ) {
BX_DEBUG_ATA("ata_cmd_packet : not ready (status %02x)\n"
, (unsigned) status);
return 4;
}
// Enable interrupts
outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
return 0;
}
// ---------------------------------------------------------------------------
// ATA/ATAPI driver : device detection
// ---------------------------------------------------------------------------
void
ata_detect()
{
u8 hdcount, cdcount, device, type;
u8 buffer[0x0200];
memset(buffer, 0, sizeof(buffer));
#if CONFIG_MAX_ATA_INTERFACES > 0
SET_EBDA(ata.channels[0].iface,ATA_IFACE_ISA);
SET_EBDA(ata.channels[0].iobase1,0x1f0);
SET_EBDA(ata.channels[0].iobase2,0x3f0);
SET_EBDA(ata.channels[0].irq,14);
#endif
#if CONFIG_MAX_ATA_INTERFACES > 1
SET_EBDA(ata.channels[1].iface,ATA_IFACE_ISA);
SET_EBDA(ata.channels[1].iobase1,0x170);
SET_EBDA(ata.channels[1].iobase2,0x370);
SET_EBDA(ata.channels[1].irq,15);
#endif
#if CONFIG_MAX_ATA_INTERFACES > 2
SET_EBDA(ata.channels[2].iface,ATA_IFACE_ISA);
SET_EBDA(ata.channels[2].iobase1,0x1e8);
SET_EBDA(ata.channels[2].iobase2,0x3e0);
SET_EBDA(ata.channels[2].irq,12);
#endif
#if CONFIG_MAX_ATA_INTERFACES > 3
SET_EBDA(ata.channels[3].iface,ATA_IFACE_ISA);
SET_EBDA(ata.channels[3].iobase1,0x168);
SET_EBDA(ata.channels[3].iobase2,0x360);
SET_EBDA(ata.channels[3].irq,11);
#endif
#if CONFIG_MAX_ATA_INTERFACES > 4
#error Please fill the ATA interface informations
#endif
// Device detection
hdcount=cdcount=0;
for(device=0; device<CONFIG_MAX_ATA_DEVICES; device++) {
u16 iobase1, iobase2;
u8 channel, slave, shift;
u8 sc, sn, cl, ch, st;
channel = device / 2;
slave = device % 2;
iobase1 =GET_EBDA(ata.channels[channel].iobase1);
iobase2 =GET_EBDA(ata.channels[channel].iobase2);
// Disable interrupts
outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC);
// Look for device
outb(slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0, iobase1+ATA_CB_DH);
outb(0x55, iobase1+ATA_CB_SC);
outb(0xaa, iobase1+ATA_CB_SN);
outb(0xaa, iobase1+ATA_CB_SC);
outb(0x55, iobase1+ATA_CB_SN);
outb(0x55, iobase1+ATA_CB_SC);
outb(0xaa, iobase1+ATA_CB_SN);
// If we found something
sc = inb(iobase1+ATA_CB_SC);
sn = inb(iobase1+ATA_CB_SN);
if ( (sc == 0x55) && (sn == 0xaa) ) {
SET_EBDA(ata.devices[device].type,ATA_TYPE_UNKNOWN);
// reset the channel
ata_reset(device);
// check for ATA or ATAPI
outb(slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0, iobase1+ATA_CB_DH);
sc = inb(iobase1+ATA_CB_SC);
sn = inb(iobase1+ATA_CB_SN);
if ((sc==0x01) && (sn==0x01)) {
cl = inb(iobase1+ATA_CB_CL);
ch = inb(iobase1+ATA_CB_CH);
st = inb(iobase1+ATA_CB_STAT);
if ((cl==0x14) && (ch==0xeb)) {
SET_EBDA(ata.devices[device].type,ATA_TYPE_ATAPI);
} else if ((cl==0x00) && (ch==0x00) && (st!=0x00)) {
SET_EBDA(ata.devices[device].type,ATA_TYPE_ATA);
} else if ((cl==0xff) && (ch==0xff)) {
SET_EBDA(ata.devices[device].type,ATA_TYPE_NONE);
}
}
}
type=GET_EBDA(ata.devices[device].type);
// Now we send a IDENTIFY command to ATA device
if(type == ATA_TYPE_ATA) {
u32 sectors;
u16 cylinders, heads, spt, blksize;
u8 translation, removable, mode;
//Temporary values to do the transfer
SET_EBDA(ata.devices[device].device,ATA_DEVICE_HD);
SET_EBDA(ata.devices[device].mode, ATA_MODE_PIO16);
u16 ret = ata_cmd_data_in(device,ATA_CMD_IDENTIFY_DEVICE
, 1, 0, 0, 0, 0L
, GET_SEG(SS), (u32)buffer);
if (ret)
BX_PANIC("ata-detect: Failed to detect ATA device\n");
removable = (buffer[0] & 0x80) ? 1 : 0;
mode = buffer[96] ? ATA_MODE_PIO32 : ATA_MODE_PIO16;
blksize = *(u16*)&buffer[10];
cylinders = *(u16*)&buffer[1*2]; // word 1
heads = *(u16*)&buffer[3*2]; // word 3
spt = *(u16*)&buffer[6*2]; // word 6
sectors = *(u32*)&buffer[60*2]; // word 60 and word 61
SET_EBDA(ata.devices[device].device,ATA_DEVICE_HD);
SET_EBDA(ata.devices[device].removable, removable);
SET_EBDA(ata.devices[device].mode, mode);
SET_EBDA(ata.devices[device].blksize, blksize);
SET_EBDA(ata.devices[device].pchs.heads, heads);
SET_EBDA(ata.devices[device].pchs.cylinders, cylinders);
SET_EBDA(ata.devices[device].pchs.spt, spt);
SET_EBDA(ata.devices[device].sectors, sectors);
BX_INFO("ata%d-%d: PCHS=%u/%d/%d translation=", channel, slave,cylinders, heads, spt);
translation = inb_cmos(CMOS_BIOS_DISKTRANSFLAG + channel/2);
for (shift=device%4; shift>0; shift--)
translation >>= 2;
translation &= 0x03;
SET_EBDA(ata.devices[device].translation, translation);
switch (translation) {
case ATA_TRANSLATION_NONE:
BX_INFO("none");
break;
case ATA_TRANSLATION_LBA:
BX_INFO("lba");
break;
case ATA_TRANSLATION_LARGE:
BX_INFO("large");
break;
case ATA_TRANSLATION_RECHS:
BX_INFO("r-echs");
break;
}
switch (translation) {
case ATA_TRANSLATION_NONE:
break;
case ATA_TRANSLATION_LBA:
spt = 63;
sectors /= 63;
heads = sectors / 1024;
if (heads>128) heads = 255;
else if (heads>64) heads = 128;
else if (heads>32) heads = 64;
else if (heads>16) heads = 32;
else heads=16;
cylinders = sectors / heads;
break;
case ATA_TRANSLATION_RECHS:
// Take care not to overflow
if (heads==16) {
if(cylinders>61439) cylinders=61439;
heads=15;
cylinders = (u16)((u32)(cylinders)*16/15);
}
// then go through the large bitshift process
case ATA_TRANSLATION_LARGE:
while(cylinders > 1024) {
cylinders >>= 1;
heads <<= 1;
// If we max out the head count
if (heads > 127) break;
}
break;
}
// clip to 1024 cylinders in lchs
if (cylinders > 1024)
cylinders=1024;
BX_INFO(" LCHS=%d/%d/%d\n", cylinders, heads, spt);
SET_EBDA(ata.devices[device].lchs.heads, heads);
SET_EBDA(ata.devices[device].lchs.cylinders, cylinders);
SET_EBDA(ata.devices[device].lchs.spt, spt);
// fill hdidmap
SET_EBDA(ata.hdidmap[hdcount], device);
hdcount++;
}
// Now we send a IDENTIFY command to ATAPI device
if(type == ATA_TYPE_ATAPI) {
u8 type, removable, mode;
u16 blksize;
//Temporary values to do the transfer
SET_EBDA(ata.devices[device].device,ATA_DEVICE_CDROM);
SET_EBDA(ata.devices[device].mode, ATA_MODE_PIO16);
u16 ret = ata_cmd_data_in(device,ATA_CMD_IDENTIFY_DEVICE_PACKET
, 1, 0, 0, 0, 0L
, GET_SEG(SS), (u32)buffer);
if (ret != 0)
BX_PANIC("ata-detect: Failed to detect ATAPI device\n");
type = buffer[1] & 0x1f;
removable = (buffer[0] & 0x80) ? 1 : 0;
mode = buffer[96] ? ATA_MODE_PIO32 : ATA_MODE_PIO16;
blksize = 2048;
SET_EBDA(ata.devices[device].device, type);
SET_EBDA(ata.devices[device].removable, removable);
SET_EBDA(ata.devices[device].mode, mode);
SET_EBDA(ata.devices[device].blksize, blksize);
// fill cdidmap
SET_EBDA(ata.cdidmap[cdcount], device);
cdcount++;
}
u32 sizeinmb = 0;
u16 ataversion;
u8 c, i, version=0, model[41];
switch (type) {
case ATA_TYPE_ATA:
sizeinmb = GET_EBDA(ata.devices[device].sectors);
sizeinmb >>= 11;
case ATA_TYPE_ATAPI:
// Read ATA/ATAPI version
ataversion=((u16)(buffer[161])<<8) | buffer[160];
for(version=15;version>0;version--) {
if ((ataversion&(1<<version))!=0)
break;
}
// Read model name
for (i=0;i<20;i++) {
model[i*2] = buffer[(i*2)+54+1];
model[(i*2)+1] = buffer[(i*2)+54];
}
// Reformat
model[40] = 0x00;
for (i=39;i>0;i--) {
if (model[i]==0x20)
model[i] = 0x00;
else
break;
}
break;
}
switch (type) {
case ATA_TYPE_ATA:
printf("ata%d %s: ",channel,slave?" slave":"master");
i=0;
while ((c=model[i++]))
printf("%c",c);
if (sizeinmb < (1UL<<16))
printf(" ATA-%d Hard-Disk (%u MBytes)\n", version, (u16)sizeinmb);
else
printf(" ATA-%d Hard-Disk (%u GBytes)\n", version, (u16)(sizeinmb>>10));
break;
case ATA_TYPE_ATAPI:
printf("ata%d %s: ",channel,slave?" slave":"master");
i=0;
while ((c=model[i++]))
printf("%c",c);
if (GET_EBDA(ata.devices[device].device)==ATA_DEVICE_CDROM)
printf(" ATAPI-%d CD-Rom/DVD-Rom\n",version);
else
printf(" ATAPI-%d Device\n",version);
break;
case ATA_TYPE_UNKNOWN:
printf("ata%d %s: Unknown device\n",channel,slave?" slave":"master");
break;
}
}
// Store the devices counts
SET_EBDA(ata.hdcount, hdcount);
SET_EBDA(ata.cdcount, cdcount);
SET_BDA(disk_count, hdcount);
printf("\n");
// FIXME : should use bios=cmos|auto|disable bits
// FIXME : should know about translation bits
// FIXME : move hard_drive_post here
}