/* ata.c - ATA disk access. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see .
*/
#include
#include
#include
#include
#include
#include
#include
/* At the moment, only two IDE ports are supported. */
static const int grub_ata_ioaddress[] = { 0x1f0, 0x170 };
static const int grub_ata_ioaddress2[] = { 0x3f6, 0x376 };
static struct grub_ata_device *grub_ata_devices;
/* Wait for !BSY. */
grub_err_t
grub_ata_wait_not_busy (struct grub_ata_device *dev, int milliseconds)
{
/* ATA requires 400ns (after a write to CMD register) or
1 PIO cycle (after a DRQ block transfer) before
first check of BSY. */
grub_millisleep (1);
int i = 1;
while (grub_ata_regget (dev, GRUB_ATA_REG_STATUS) & GRUB_ATA_STATUS_BUSY)
{
if (i >= milliseconds)
{
grub_dprintf ("ata", "timeout: %dms\n", milliseconds);
return grub_error (GRUB_ERR_TIMEOUT, "ATA timeout");
}
grub_millisleep (1);
i++;
}
return GRUB_ERR_NONE;
}
static inline void
grub_ata_wait (void)
{
grub_millisleep (50);
}
/* Wait for !BSY, DRQ. */
grub_err_t
grub_ata_wait_drq (struct grub_ata_device *dev, int rw,
int milliseconds)
{
if (grub_ata_wait_not_busy (dev, milliseconds))
return grub_errno;
/* !DRQ implies error condition. */
grub_uint8_t sts = grub_ata_regget (dev, GRUB_ATA_REG_STATUS);
if ((sts & (GRUB_ATA_STATUS_DRQ | GRUB_ATA_STATUS_ERR))
!= GRUB_ATA_STATUS_DRQ)
{
grub_dprintf ("ata", "ata error: status=0x%x, error=0x%x\n",
sts, grub_ata_regget (dev, GRUB_ATA_REG_ERROR));
if (! rw)
return grub_error (GRUB_ERR_READ_ERROR, "ATA read error");
else
return grub_error (GRUB_ERR_WRITE_ERROR, "ATA write error");
}
return GRUB_ERR_NONE;
}
/* Byteorder has to be changed before strings can be read. */
static void
grub_ata_strncpy (char *dst, char *src, grub_size_t len)
{
grub_uint16_t *src16 = (grub_uint16_t *) src;
grub_uint16_t *dst16 = (grub_uint16_t *) dst;
unsigned int i;
for (i = 0; i < len / 2; i++)
*(dst16++) = grub_be_to_cpu16 (*(src16++));
dst[len] = '\0';
}
void
grub_ata_pio_read (struct grub_ata_device *dev, char *buf, grub_size_t size)
{
grub_uint16_t *buf16 = (grub_uint16_t *) buf;
unsigned int i;
/* Read in the data, word by word. */
for (i = 0; i < size / 2; i++)
buf16[i] = grub_le_to_cpu16 (grub_inw(dev->ioaddress + GRUB_ATA_REG_DATA));
}
static void
grub_ata_pio_write (struct grub_ata_device *dev, char *buf, grub_size_t size)
{
grub_uint16_t *buf16 = (grub_uint16_t *) buf;
unsigned int i;
/* Write the data, word by word. */
for (i = 0; i < size / 2; i++)
grub_outw(grub_cpu_to_le16 (buf16[i]), dev->ioaddress + GRUB_ATA_REG_DATA);
}
static void
grub_ata_dumpinfo (struct grub_ata_device *dev, char *info)
{
char text[41];
/* The device information was read, dump it for debugging. */
grub_ata_strncpy (text, info + 20, 20);
grub_dprintf ("ata", "Serial: %s\n", text);
grub_ata_strncpy (text, info + 46, 8);
grub_dprintf ("ata", "Firmware: %s\n", text);
grub_ata_strncpy (text, info + 54, 40);
grub_dprintf ("ata", "Model: %s\n", text);
if (! dev->atapi)
{
grub_dprintf ("ata", "Addressing: %d\n", dev->addr);
grub_dprintf ("ata", "Sectors: %lld\n", dev->size);
}
}
static grub_err_t
grub_atapi_identify (struct grub_ata_device *dev)
{
char *info;
info = grub_malloc (GRUB_DISK_SECTOR_SIZE);
if (! info)
return grub_errno;
grub_ata_regset (dev, GRUB_ATA_REG_DISK, 0xE0 | dev->device << 4);
if (grub_ata_check_ready (dev))
{
grub_free (info);
return grub_errno;
}
grub_ata_regset (dev, GRUB_ATA_REG_CMD, GRUB_ATA_CMD_IDENTIFY_PACKET_DEVICE);
grub_ata_wait ();
if (grub_ata_wait_drq (dev, 0, GRUB_ATA_TOUT_STD))
{
grub_free (info);
return grub_errno;
}
grub_ata_pio_read (dev, info, GRUB_DISK_SECTOR_SIZE);
dev->atapi = 1;
grub_ata_dumpinfo (dev, info);
grub_free (info);
return GRUB_ERR_NONE;
}
static grub_err_t
grub_atapi_wait_drq (struct grub_ata_device *dev,
grub_uint8_t ireason,
int milliseconds)
{
/* Wait for !BSY, DRQ, ireason */
if (grub_ata_wait_not_busy (dev, milliseconds))
return grub_errno;
grub_uint8_t sts = grub_ata_regget (dev, GRUB_ATA_REG_STATUS);
grub_uint8_t irs = grub_ata_regget (dev, GRUB_ATAPI_REG_IREASON);
/* OK if DRQ is asserted and interrupt reason is as expected. */
if ((sts & GRUB_ATA_STATUS_DRQ)
&& (irs & GRUB_ATAPI_IREASON_MASK) == ireason)
return GRUB_ERR_NONE;
/* !DRQ implies error condition. */
grub_dprintf ("ata", "atapi error: status=0x%x, ireason=0x%x, error=0x%x\n",
sts, irs, grub_ata_regget (dev, GRUB_ATA_REG_ERROR));
if (! (sts & GRUB_ATA_STATUS_DRQ)
&& (irs & GRUB_ATAPI_IREASON_MASK) == GRUB_ATAPI_IREASON_ERROR)
{
if (ireason == GRUB_ATAPI_IREASON_CMD_OUT)
return grub_error (GRUB_ERR_READ_ERROR, "ATA PACKET command error");
else
return grub_error (GRUB_ERR_READ_ERROR, "ATAPI read error");
}
return grub_error (GRUB_ERR_READ_ERROR, "ATAPI protocol error");
}
static grub_err_t
grub_atapi_packet (struct grub_ata_device *dev, char *packet,
grub_size_t size)
{
grub_ata_regset (dev, GRUB_ATA_REG_DISK, dev->device << 4);
if (grub_ata_check_ready (dev))
return grub_errno;
/* Send ATA PACKET command. */
grub_ata_regset (dev, GRUB_ATA_REG_FEATURES, 0);
grub_ata_regset (dev, GRUB_ATAPI_REG_IREASON, 0);
grub_ata_regset (dev, GRUB_ATAPI_REG_CNTHIGH, size >> 8);
grub_ata_regset (dev, GRUB_ATAPI_REG_CNTLOW, size & 0xFF);
grub_ata_regset (dev, GRUB_ATA_REG_CMD, GRUB_ATA_CMD_PACKET);
/* Wait for !BSY, DRQ, !I/O, C/D. */
if (grub_atapi_wait_drq (dev, GRUB_ATAPI_IREASON_CMD_OUT, GRUB_ATA_TOUT_STD))
return grub_errno;
/* Write the packet. */
grub_ata_pio_write (dev, packet, 12);
return GRUB_ERR_NONE;
}
static grub_err_t
grub_ata_identify (struct grub_ata_device *dev)
{
char *info;
grub_uint16_t *info16;
info = grub_malloc (GRUB_DISK_SECTOR_SIZE);
if (! info)
return grub_errno;
info16 = (grub_uint16_t *) info;
grub_ata_regset (dev, GRUB_ATA_REG_DISK, 0xE0 | dev->device << 4);
if (grub_ata_check_ready (dev))
{
grub_free (info);
return grub_errno;
}
grub_ata_regset (dev, GRUB_ATA_REG_CMD, GRUB_ATA_CMD_IDENTIFY_DEVICE);
grub_ata_wait ();
if (grub_ata_wait_drq (dev, 0, GRUB_ATA_TOUT_STD))
{
if (grub_ata_regget (dev, GRUB_ATA_REG_ERROR) & 0x04) /* ABRT */
{
/* Device without ATA IDENTIFY, try ATAPI. */
grub_free(info);
grub_errno = GRUB_ERR_NONE;
return grub_atapi_identify (dev);
}
else
{
/* Error. */
grub_free(info);
return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
"device can not be identified");
}
}
grub_ata_pio_read (dev, info, GRUB_DISK_SECTOR_SIZE);
/* Now it is certain that this is not an ATAPI device. */
dev->atapi = 0;
/* CHS is always supported. */
dev->addr = GRUB_ATA_CHS;
/* Check if LBA is supported. */
if (info16[49] & (1 << 9))
{
/* Check if LBA48 is supported. */
if (info16[83] & (1 << 10))
dev->addr = GRUB_ATA_LBA48;
else
dev->addr = GRUB_ATA_LBA;
}
/* Determine the amount of sectors. */
if (dev->addr != GRUB_ATA_LBA48)
dev->size = grub_le_to_cpu32(*((grub_uint32_t *) &info16[60]));
else
dev->size = grub_le_to_cpu64(*((grub_uint64_t *) &info16[100]));
/* Read CHS information. */
dev->cylinders = info16[1];
dev->heads = info16[3];
dev->sectors_per_track = info16[6];
grub_ata_dumpinfo (dev, info);
grub_free(info);
return 0;
}
static grub_err_t
grub_ata_device_initialize (int port, int device, int addr, int addr2)
{
struct grub_ata_device *dev;
struct grub_ata_device **devp;
grub_dprintf ("ata", "detecting device %d,%d (0x%x, 0x%x)\n",
port, device, addr, addr2);
dev = grub_malloc (sizeof(*dev));
if (! dev)
return grub_errno;
/* Setup the device information. */
dev->port = port;
dev->device = device;
dev->ioaddress = addr;
dev->ioaddress2 = addr2;
dev->next = NULL;
grub_ata_regset (dev, GRUB_ATA_REG_DISK, dev->device << 4);
grub_ata_wait ();
/* If status is 0x00, it is safe to assume that there
is no device (or only a !READY) device connected. */
grub_int8_t sts = grub_ata_regget (dev, GRUB_ATA_REG_STATUS);
grub_dprintf ("ata", "status=0x%x\n", sts);
if (sts == 0x00)
{
grub_free(dev);
return 0;
}
/* Try to detect if the port is in use by writing to it,
waiting for a while and reading it again. If the value
was preserved, there is a device connected.
But this tests often detects a second (slave) device
connected to a SATA controller which supports only one
(master) device. In this case, the status register
check above usually works. */
grub_ata_regset (dev, GRUB_ATA_REG_SECTORS, 0x5A);
grub_ata_wait ();
grub_int8_t sec = grub_ata_regget (dev, GRUB_ATA_REG_SECTORS);
grub_dprintf ("ata", "sectors=0x%x\n", sec);
if (sec != 0x5A)
{
grub_free(dev);
return 0;
}
/* Use the IDENTIFY DEVICE command to query the device. */
if (grub_ata_identify (dev))
{
grub_free (dev);
return 0;
}
/* Register the device. */
for (devp = &grub_ata_devices; *devp; devp = &(*devp)->next);
*devp = dev;
return 0;
}
static int NESTED_FUNC_ATTR
grub_ata_pciinit (int bus, int device, int func,
grub_pci_id_t pciid __attribute__((unused)))
{
static int compat_use[2] = { 0 };
grub_pci_address_t addr;
grub_uint32_t class;
grub_uint32_t bar1;
grub_uint32_t bar2;
int rega;
int regb;
int i;
static int controller = 0;
/* Read class. */
addr = grub_pci_make_address (bus, device, func, 2);
class = grub_pci_read (addr);
/* Check if this class ID matches that of a PCI IDE Controller. */
if (class >> 16 != 0x0101)
return 0;
for (i = 0; i < 2; i++)
{
/* Set to 0 when the channel operated in compatibility mode. */
int compat = (class >> (8 + 2 * i)) & 1;
rega = 0;
regb = 0;
/* If the channel is in compatibility mode, just assign the
default registers. */
if (compat == 0 && !compat_use[i])
{
rega = grub_ata_ioaddress[i];
regb = grub_ata_ioaddress2[i];
compat_use[i] = 1;
}
else if (compat)
{
/* Read the BARs, which either contain a mmapped IO address
or the IO port address. */
addr = grub_pci_make_address (bus, device, func, 4 + 2 * i);
bar1 = grub_pci_read (addr);
addr = grub_pci_make_address (bus, device, func, 5 + 2 * i);
bar2 = grub_pci_read (addr);
/* Check if the BARs describe an IO region. */
if ((bar1 & 1) && (bar2 & 1))
{
rega = bar1 & ~3;
regb = bar2 & ~3;
}
}
grub_dprintf ("ata",
"PCI dev (%d,%d,%d) compat=%d rega=0x%x regb=0x%x\n",
bus, device, func, compat, rega, regb);
if (rega && regb)
{
grub_errno = GRUB_ERR_NONE;
grub_ata_device_initialize (controller * 2 + i, 0, rega, regb);
/* Most errors rised by grub_ata_device_initialize() are harmless.
They just indicate this particular drive is not responding, most
likely because it doesn't exist. We might want to ignore specific
error types here, instead of printing them. */
if (grub_errno)
{
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
}
grub_ata_device_initialize (controller * 2 + i, 1, rega, regb);
/* Likewise. */
if (grub_errno)
{
grub_print_error ();
grub_errno = GRUB_ERR_NONE;
}
}
}
controller++;
return 0;
}
static grub_err_t
grub_ata_initialize (void)
{
grub_pci_iterate (grub_ata_pciinit);
return 0;
}
static void
grub_ata_setlba (struct grub_ata_device *dev, grub_disk_addr_t sector,
grub_size_t size)
{
grub_ata_regset (dev, GRUB_ATA_REG_SECTORS, size);
grub_ata_regset (dev, GRUB_ATA_REG_LBALOW, sector & 0xFF);
grub_ata_regset (dev, GRUB_ATA_REG_LBAMID, (sector >> 8) & 0xFF);
grub_ata_regset (dev, GRUB_ATA_REG_LBAHIGH, (sector >> 16) & 0xFF);
}
static grub_err_t
grub_ata_setaddress (struct grub_ata_device *dev,
grub_ata_addressing_t addressing,
grub_disk_addr_t sector,
grub_size_t size)
{
switch (addressing)
{
case GRUB_ATA_CHS:
{
unsigned int cylinder;
unsigned int head;
unsigned int sect;
/* Calculate the sector, cylinder and head to use. */
sect = ((grub_uint32_t) sector % dev->sectors_per_track) + 1;
cylinder = (((grub_uint32_t) sector / dev->sectors_per_track)
/ dev->heads);
head = ((grub_uint32_t) sector / dev->sectors_per_track) % dev->heads;
if (sect > dev->sectors_per_track
|| cylinder > dev->cylinders
|| head > dev->heads)
return grub_error (GRUB_ERR_OUT_OF_RANGE,
"sector %d can not be addressed "
"using CHS addressing", sector);
grub_ata_regset (dev, GRUB_ATA_REG_DISK, (dev->device << 4) | head);
if (grub_ata_check_ready (dev))
return grub_errno;
grub_ata_regset (dev, GRUB_ATA_REG_SECTNUM, sect);
grub_ata_regset (dev, GRUB_ATA_REG_CYLLSB, cylinder & 0xFF);
grub_ata_regset (dev, GRUB_ATA_REG_CYLMSB, cylinder >> 8);
break;
}
case GRUB_ATA_LBA:
if (size == 256)
size = 0;
grub_ata_regset (dev, GRUB_ATA_REG_DISK,
0xE0 | (dev->device << 4) | ((sector >> 24) & 0x0F));
if (grub_ata_check_ready (dev))
return grub_errno;
grub_ata_setlba (dev, sector, size);
break;
case GRUB_ATA_LBA48:
if (size == 65536)
size = 0;
grub_ata_regset (dev, GRUB_ATA_REG_DISK, 0xE0 | (dev->device << 4));
if (grub_ata_check_ready (dev))
return grub_errno;
/* Set "Previous". */
grub_ata_setlba (dev, sector >> 24, size >> 8);
/* Set "Current". */
grub_ata_setlba (dev, sector, size);
break;
}
return GRUB_ERR_NONE;
}
static grub_err_t
grub_ata_readwrite (grub_disk_t disk, grub_disk_addr_t sector,
grub_size_t size, char *buf, int rw)
{
struct grub_ata_device *dev = (struct grub_ata_device *) disk->data;
grub_dprintf("ata", "grub_ata_readwrite (size=%u, rw=%d)\n", size, rw);
grub_ata_addressing_t addressing = dev->addr;
grub_size_t batch;
int cmd, cmd_write;
if (addressing == GRUB_ATA_LBA48 && ((sector + size) >> 28) != 0)
{
batch = 65536;
cmd = GRUB_ATA_CMD_READ_SECTORS_EXT;
cmd_write = GRUB_ATA_CMD_WRITE_SECTORS_EXT;
}
else
{
if (addressing == GRUB_ATA_LBA48)
addressing = GRUB_ATA_LBA;
batch = 256;
cmd = GRUB_ATA_CMD_READ_SECTORS;
cmd_write = GRUB_ATA_CMD_WRITE_SECTORS;
}
grub_size_t nsectors = 0;
while (nsectors < size)
{
if (size - nsectors < batch)
batch = size - nsectors;
grub_dprintf("ata", "rw=%d, sector=%llu, batch=%u\n", rw, sector, batch);
/* Send read/write commmand. */
if (grub_ata_setaddress (dev, addressing, sector, batch))
return grub_errno;
grub_ata_regset (dev, GRUB_ATA_REG_CMD, (! rw ? cmd : cmd_write));
unsigned sect;
for (sect = 0; sect < batch; sect++)
{
/* Wait for !BSY, DRQ. */
if (grub_ata_wait_drq (dev, rw, GRUB_ATA_TOUT_DATA))
return grub_errno;
/* Transfer data. */
if (! rw)
grub_ata_pio_read (dev, buf, GRUB_DISK_SECTOR_SIZE);
else
grub_ata_pio_write (dev, buf, GRUB_DISK_SECTOR_SIZE);
buf += GRUB_DISK_SECTOR_SIZE;
}
if (rw)
{
/* Check for write error. */
if (grub_ata_wait_not_busy (dev, GRUB_ATA_TOUT_DATA))
return grub_errno;
if (grub_ata_regget (dev, GRUB_ATA_REG_STATUS)
& (GRUB_ATA_STATUS_DRQ | GRUB_ATA_STATUS_ERR))
return grub_error (GRUB_ERR_WRITE_ERROR, "ATA write error");
}
sector += batch;
nsectors += batch;
}
return GRUB_ERR_NONE;
}
static int
grub_ata_iterate (int (*hook) (const char *name))
{
struct grub_ata_device *dev;
for (dev = grub_ata_devices; dev; dev = dev->next)
{
char devname[5];
grub_sprintf (devname, "ata%d", dev->port * 2 + dev->device);
if (dev->atapi)
continue;
if (hook (devname))
return 1;
}
return 0;
}
static grub_err_t
grub_ata_open (const char *name, grub_disk_t disk)
{
struct grub_ata_device *dev;
for (dev = grub_ata_devices; dev; dev = dev->next)
{
char devname[5];
grub_sprintf (devname, "ata%d", dev->port * 2 + dev->device);
if (grub_strcmp (name, devname) == 0)
break;
}
if (! dev)
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "Can't open device");
if (dev->atapi)
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "not an ATA harddisk");
disk->total_sectors = dev->size;
disk->id = (unsigned long) dev;
disk->has_partitions = 1;
disk->data = dev;
return 0;
}
static void
grub_ata_close (grub_disk_t disk __attribute__((unused)))
{
}
static grub_err_t
grub_ata_read (grub_disk_t disk, grub_disk_addr_t sector,
grub_size_t size, char *buf)
{
return grub_ata_readwrite (disk, sector, size, buf, 0);
}
static grub_err_t
grub_ata_write (grub_disk_t disk,
grub_disk_addr_t sector,
grub_size_t size,
const char *buf)
{
return grub_ata_readwrite (disk, sector, size, (char *) buf, 1);
}
static struct grub_disk_dev grub_atadisk_dev =
{
.name = "ATA",
.id = GRUB_DISK_DEVICE_ATA_ID,
.iterate = grub_ata_iterate,
.open = grub_ata_open,
.close = grub_ata_close,
.read = grub_ata_read,
.write = grub_ata_write,
.next = 0
};
/* ATAPI code. */
static int
grub_atapi_iterate (int (*hook) (const char *name, int luns))
{
struct grub_ata_device *dev;
for (dev = grub_ata_devices; dev; dev = dev->next)
{
char devname[7];
grub_sprintf (devname, "ata%d", dev->port * 2 + dev->device);
if (! dev->atapi)
continue;
if (hook (devname, 1))
return 1;
}
return 0;
}
static grub_err_t
grub_atapi_read (struct grub_scsi *scsi,
grub_size_t cmdsize __attribute__((unused)),
char *cmd, grub_size_t size, char *buf)
{
struct grub_ata_device *dev = (struct grub_ata_device *) scsi->data;
grub_dprintf("ata", "grub_atapi_read (size=%u)\n", size);
if (grub_atapi_packet (dev, cmd, size))
return grub_errno;
grub_size_t nread = 0;
while (nread < size)
{
/* Wait for !BSY, DRQ, I/O, !C/D. */
if (grub_atapi_wait_drq (dev, GRUB_ATAPI_IREASON_DATA_IN, GRUB_ATA_TOUT_DATA))
return grub_errno;
/* Get byte count for this DRQ assertion. */
unsigned cnt = grub_ata_regget (dev, GRUB_ATAPI_REG_CNTHIGH) << 8
| grub_ata_regget (dev, GRUB_ATAPI_REG_CNTLOW);
grub_dprintf("ata", "DRQ count=%u\n", cnt);
/* Count of last transfer may be uneven. */
if (! (0 < cnt && cnt <= size - nread && (! (cnt & 1) || cnt == size - nread)))
return grub_error (GRUB_ERR_READ_ERROR, "Invalid ATAPI transfer count");
/* Read the data. */
grub_ata_pio_read (dev, buf + nread, cnt);
if (cnt & 1)
buf[nread + cnt - 1] = (char) grub_le_to_cpu16 (grub_inw (dev->ioaddress + GRUB_ATA_REG_DATA));
nread += cnt;
}
return GRUB_ERR_NONE;
}
static grub_err_t
grub_atapi_write (struct grub_scsi *scsi __attribute__((unused)),
grub_size_t cmdsize __attribute__((unused)),
char *cmd __attribute__((unused)),
grub_size_t size __attribute__((unused)),
char *buf __attribute__((unused)))
{
// XXX: scsi.mod does not use write yet.
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, "ATAPI write not implemented");
}
static grub_err_t
grub_atapi_open (const char *name, struct grub_scsi *scsi)
{
struct grub_ata_device *dev;
struct grub_ata_device *devfnd = 0;
for (dev = grub_ata_devices; dev; dev = dev->next)
{
char devname[7];
grub_sprintf (devname, "ata%d", dev->port * 2 + dev->device);
if (!grub_strcmp (devname, name))
{
devfnd = dev;
break;
}
}
grub_dprintf ("ata", "opening ATAPI dev `%s'\n", name);
if (! devfnd)
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "No such ATAPI device");
scsi->data = devfnd;
return GRUB_ERR_NONE;
}
static void
grub_atapi_close (struct grub_scsi *scsi)
{
grub_free (scsi->name);
}
static struct grub_scsi_dev grub_atapi_dev =
{
.name = "ATAPI",
.iterate = grub_atapi_iterate,
.open = grub_atapi_open,
.close = grub_atapi_close,
.read = grub_atapi_read,
.write = grub_atapi_write
};
GRUB_MOD_INIT(ata)
{
/* To prevent two drivers operating on the same disks. */
grub_disk_firmware_is_tainted = 1;
if (grub_disk_firmware_fini)
{
grub_disk_firmware_fini ();
grub_disk_firmware_fini = NULL;
}
/* ATA initialization. */
grub_ata_initialize ();
grub_disk_dev_register (&grub_atadisk_dev);
/* ATAPI devices are handled by scsi.mod. */
grub_scsi_dev_register (&grub_atapi_dev);
}
GRUB_MOD_FINI(ata)
{
grub_scsi_dev_unregister (&grub_atapi_dev);
grub_disk_dev_unregister (&grub_atadisk_dev);
}