3138b44c90
* disk/ata.c (grub_ata_wait_status): Replace by ... (grub_ata_wait_not_busy): ... this function. Checks only BSY bit, other status bits may be invalid while BSY is asserted. (grub_ata_check_ready): New function. (grub_ata_cmd): Removed. (grub_ata_wait_drq): New function. (grub_ata_strncpy): Remove inline. (grub_ata_pio_read): Reduce to actual block transfer. BSY wait and error check now done by grub_ata_wait_drq (). (grub_ata_pio_write): Likewise. (grub_atapi_identify): Set DEV before check for !BSY. Use grub_ata_wait_drq () to wait for data. (grub_ata_device_initialize): Add status register check to detect missing SATA slave devices. Add debug messages. (grub_atapi_wait_drq): Use grub_ata_wait_not_busy (). (grub_atapi_packet): Set DEV before check for !BSY. Replace transfer loop by grub_ata_pio_write (). (grub_ata_identify): Set DEV before check for !BSY. Use grub_ata_wait_drq () to wait for data. (grub_ata_setaddress): Set DEV before check for !BSY. (grub_ata_readwrite): Remove duplicate code, handle batch/rest and read/write in one loop. Fix invalid command on write. Fix incomplete command on (size % batch) == 0. Add missing error check after write of last block. Add debug messages. (grub_atapi_read): Replace transfer loop by grub_ata_pio_read ().
992 lines
25 KiB
C
992 lines
25 KiB
C
/* ata.c - ATA disk access. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2007, 2008 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/dl.h>
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#include <grub/misc.h>
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#include <grub/disk.h>
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#include <grub/mm.h>
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#include <grub/time.h>
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#include <grub/pci.h>
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#include <grub/scsi.h>
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/* XXX: For now this only works on i386. */
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#include <grub/cpu/io.h>
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typedef enum
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{
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GRUB_ATA_CHS,
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GRUB_ATA_LBA,
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GRUB_ATA_LBA48
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} grub_ata_addressing_t;
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/* At the moment, only two IDE ports are supported. */
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static const int grub_ata_ioaddress[] = { 0x1f0, 0x170 };
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static const int grub_ata_ioaddress2[] = { 0x3f6, 0x376 };
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#define GRUB_CDROM_SECTOR_SIZE 2048
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#define GRUB_ATA_REG_DATA 0
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#define GRUB_ATA_REG_ERROR 1
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#define GRUB_ATA_REG_FEATURES 1
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#define GRUB_ATA_REG_SECTORS 2
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#define GRUB_ATAPI_REG_IREASON 2
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#define GRUB_ATA_REG_SECTNUM 3
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#define GRUB_ATA_REG_CYLLSB 4
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#define GRUB_ATA_REG_CYLMSB 5
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#define GRUB_ATA_REG_LBALOW 3
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#define GRUB_ATA_REG_LBAMID 4
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#define GRUB_ATAPI_REG_CNTLOW 4
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#define GRUB_ATA_REG_LBAHIGH 5
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#define GRUB_ATAPI_REG_CNTHIGH 5
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#define GRUB_ATA_REG_DISK 6
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#define GRUB_ATA_REG_CMD 7
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#define GRUB_ATA_REG_STATUS 7
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#define GRUB_ATA_REG2_CONTROL 0
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#define GRUB_ATA_STATUS_ERR 0x01
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#define GRUB_ATA_STATUS_INDEX 0x02
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#define GRUB_ATA_STATUS_ECC 0x04
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#define GRUB_ATA_STATUS_DRQ 0x08
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#define GRUB_ATA_STATUS_SEEK 0x10
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#define GRUB_ATA_STATUS_WRERR 0x20
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#define GRUB_ATA_STATUS_READY 0x40
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#define GRUB_ATA_STATUS_BUSY 0x80
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/* ATAPI interrupt reason values (I/O, D/C bits). */
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#define GRUB_ATAPI_IREASON_MASK 0x3
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#define GRUB_ATAPI_IREASON_DATA_OUT 0x0
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#define GRUB_ATAPI_IREASON_CMD_OUT 0x1
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#define GRUB_ATAPI_IREASON_DATA_IN 0x2
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#define GRUB_ATAPI_IREASON_ERROR 0x3
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enum grub_ata_commands
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{
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GRUB_ATA_CMD_READ_SECTORS = 0x20,
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GRUB_ATA_CMD_READ_SECTORS_EXT = 0x24,
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GRUB_ATA_CMD_WRITE_SECTORS = 0x30,
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GRUB_ATA_CMD_WRITE_SECTORS_EXT = 0x34,
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GRUB_ATA_CMD_IDENTIFY_DEVICE = 0xEC,
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GRUB_ATA_CMD_IDENTIFY_PACKET_DEVICE = 0xA1,
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GRUB_ATA_CMD_PACKET = 0xA0,
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};
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enum grub_ata_timeout_milliseconds
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{
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GRUB_ATA_TOUT_STD = 1000, /* 1s standard timeout. */
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GRUB_ATA_TOUT_DATA = 10000 /* 10s DATA I/O timeout. */
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};
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struct grub_ata_device
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{
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/* IDE port to use. */
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int port;
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/* IO addresses on which the registers for this device can be
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found. */
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int ioaddress;
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int ioaddress2;
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/* Two devices can be connected to a single cable. Use this field
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to select device 0 (commonly known as "master") or device 1
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(commonly known as "slave"). */
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int device;
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/* Addressing methods available for accessing this device. If CHS
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is only available, use that. Otherwise use LBA, except for the
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high sectors. In that case use LBA48. */
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grub_ata_addressing_t addr;
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/* Sector count. */
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grub_uint64_t size;
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/* CHS maximums. */
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grub_uint16_t cylinders;
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grub_uint16_t heads;
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grub_uint16_t sectors_per_track;
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/* Set to 0 for ATA, set to 1 for ATAPI. */
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int atapi;
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struct grub_ata_device *next;
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};
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static struct grub_ata_device *grub_ata_devices;
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static inline void
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grub_ata_regset (struct grub_ata_device *dev, int reg, int val)
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{
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grub_outb (val, dev->ioaddress + reg);
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}
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static inline grub_uint8_t
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grub_ata_regget (struct grub_ata_device *dev, int reg)
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{
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return grub_inb (dev->ioaddress + reg);
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}
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static inline void
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grub_ata_regset2 (struct grub_ata_device *dev, int reg, int val)
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{
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grub_outb (val, dev->ioaddress2 + reg);
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}
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static inline grub_uint8_t
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grub_ata_regget2 (struct grub_ata_device *dev, int reg)
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{
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return grub_inb (dev->ioaddress2 + reg);
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}
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/* Wait for !BSY. */
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static grub_err_t
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grub_ata_wait_not_busy (struct grub_ata_device *dev, int milliseconds)
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{
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/* ATA requires 400ns (after a write to CMD register) or
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1 PIO cycle (after a DRQ block transfer) before
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first check of BSY. */
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grub_millisleep (1);
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int i = 1;
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while (grub_ata_regget (dev, GRUB_ATA_REG_STATUS) & GRUB_ATA_STATUS_BUSY)
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{
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if (i >= milliseconds)
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{
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grub_dprintf ("ata", "timeout: %dms\n", milliseconds);
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return grub_error (GRUB_ERR_TIMEOUT, "ATA timeout");
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}
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grub_millisleep (1);
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i++;
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}
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return GRUB_ERR_NONE;
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}
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static inline void
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grub_ata_wait (void)
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{
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grub_millisleep (50);
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}
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/* Check for !BSY before issuing a new command. */
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static inline grub_err_t
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grub_ata_check_ready (struct grub_ata_device *dev)
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{
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if (grub_ata_regget (dev, GRUB_ATA_REG_STATUS) & GRUB_ATA_STATUS_BUSY)
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return grub_ata_wait_not_busy (dev, GRUB_ATA_TOUT_STD);
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return GRUB_ERR_NONE;
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}
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/* Wait for !BSY, DRQ. */
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static grub_err_t
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grub_ata_wait_drq (struct grub_ata_device *dev, int rw,
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int milliseconds)
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{
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if (grub_ata_wait_not_busy (dev, milliseconds))
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return grub_errno;
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/* !DRQ implies error condition. */
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grub_uint8_t sts = grub_ata_regget (dev, GRUB_ATA_REG_STATUS);
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if ((sts & (GRUB_ATA_STATUS_DRQ | GRUB_ATA_STATUS_ERR))
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!= GRUB_ATA_STATUS_DRQ)
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{
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grub_dprintf ("ata", "ata error: status=0x%x, error=0x%x\n",
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sts, grub_ata_regget (dev, GRUB_ATA_REG_ERROR));
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if (! rw)
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return grub_error (GRUB_ERR_READ_ERROR, "ATA read error");
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else
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return grub_error (GRUB_ERR_WRITE_ERROR, "ATA write error");
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}
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return GRUB_ERR_NONE;
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}
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/* Byteorder has to be changed before strings can be read. */
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static void
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grub_ata_strncpy (char *dst, char *src, grub_size_t len)
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{
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grub_uint16_t *src16 = (grub_uint16_t *) src;
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grub_uint16_t *dst16 = (grub_uint16_t *) dst;
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unsigned int i;
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for (i = 0; i < len / 2; i++)
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*(dst16++) = grub_be_to_cpu16 (*(src16++));
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dst[len] = '\0';
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}
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static void
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grub_ata_pio_read (struct grub_ata_device *dev, char *buf, grub_size_t size)
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{
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grub_uint16_t *buf16 = (grub_uint16_t *) buf;
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unsigned int i;
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/* Read in the data, word by word. */
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for (i = 0; i < size / 2; i++)
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buf16[i] = grub_le_to_cpu16 (grub_inw(dev->ioaddress + GRUB_ATA_REG_DATA));
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}
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static void
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grub_ata_pio_write (struct grub_ata_device *dev, char *buf, grub_size_t size)
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{
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grub_uint16_t *buf16 = (grub_uint16_t *) buf;
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unsigned int i;
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/* Write the data, word by word. */
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for (i = 0; i < size / 2; i++)
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grub_outw(grub_cpu_to_le16 (buf16[i]), dev->ioaddress + GRUB_ATA_REG_DATA);
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}
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static void
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grub_ata_dumpinfo (struct grub_ata_device *dev, char *info)
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{
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char text[41];
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/* The device information was read, dump it for debugging. */
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grub_ata_strncpy (text, info + 20, 20);
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grub_dprintf ("ata", "Serial: %s\n", text);
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grub_ata_strncpy (text, info + 46, 8);
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grub_dprintf ("ata", "Firmware: %s\n", text);
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grub_ata_strncpy (text, info + 54, 40);
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grub_dprintf ("ata", "Model: %s\n", text);
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if (! dev->atapi)
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{
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grub_dprintf ("ata", "Addressing: %d\n", dev->addr);
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grub_dprintf ("ata", "Sectors: %lld\n", dev->size);
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}
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}
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static grub_err_t
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grub_atapi_identify (struct grub_ata_device *dev)
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{
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char *info;
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info = grub_malloc (GRUB_DISK_SECTOR_SIZE);
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if (! info)
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return grub_errno;
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grub_ata_regset (dev, GRUB_ATA_REG_DISK, 0xE0 | dev->device << 4);
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if (grub_ata_check_ready (dev))
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{
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grub_free (info);
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return grub_errno;
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}
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grub_ata_regset (dev, GRUB_ATA_REG_CMD, GRUB_ATA_CMD_IDENTIFY_PACKET_DEVICE);
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grub_ata_wait ();
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if (grub_ata_wait_drq (dev, 0, GRUB_ATA_TOUT_STD))
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{
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grub_free (info);
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return grub_errno;
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}
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grub_ata_pio_read (dev, info, GRUB_DISK_SECTOR_SIZE);
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dev->atapi = 1;
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grub_ata_dumpinfo (dev, info);
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grub_free (info);
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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grub_atapi_wait_drq (struct grub_ata_device *dev,
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grub_uint8_t ireason,
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int milliseconds)
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{
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/* Wait for !BSY, DRQ, ireason */
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if (grub_ata_wait_not_busy (dev, milliseconds))
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return grub_errno;
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grub_uint8_t sts = grub_ata_regget (dev, GRUB_ATA_REG_STATUS);
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grub_uint8_t irs = grub_ata_regget (dev, GRUB_ATAPI_REG_IREASON);
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/* OK if DRQ is asserted and interrupt reason is as expected. */
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if ((sts & GRUB_ATA_STATUS_DRQ)
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&& (irs & GRUB_ATAPI_IREASON_MASK) == ireason)
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return GRUB_ERR_NONE;
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/* !DRQ implies error condition. */
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grub_dprintf ("ata", "atapi error: status=0x%x, ireason=0x%x, error=0x%x\n",
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sts, irs, grub_ata_regget (dev, GRUB_ATA_REG_ERROR));
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if (! (sts & GRUB_ATA_STATUS_DRQ)
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&& (irs & GRUB_ATAPI_IREASON_MASK) == GRUB_ATAPI_IREASON_ERROR)
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{
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if (ireason == GRUB_ATAPI_IREASON_CMD_OUT)
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return grub_error (GRUB_ERR_READ_ERROR, "ATA PACKET command error");
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else
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return grub_error (GRUB_ERR_READ_ERROR, "ATAPI read error");
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}
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return grub_error (GRUB_ERR_READ_ERROR, "ATAPI protocol error");
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}
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static grub_err_t
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grub_atapi_packet (struct grub_ata_device *dev, char *packet,
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grub_size_t size)
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{
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grub_ata_regset (dev, GRUB_ATA_REG_DISK, dev->device << 4);
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if (grub_ata_check_ready (dev))
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return grub_errno;
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/* Send ATA PACKET command. */
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grub_ata_regset (dev, GRUB_ATA_REG_FEATURES, 0);
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grub_ata_regset (dev, GRUB_ATAPI_REG_IREASON, 0);
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grub_ata_regset (dev, GRUB_ATAPI_REG_CNTHIGH, size >> 8);
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grub_ata_regset (dev, GRUB_ATAPI_REG_CNTLOW, size & 0xFF);
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grub_ata_regset (dev, GRUB_ATA_REG_CMD, GRUB_ATA_CMD_PACKET);
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/* Wait for !BSY, DRQ, !I/O, C/D. */
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if (grub_atapi_wait_drq (dev, GRUB_ATAPI_IREASON_CMD_OUT, GRUB_ATA_TOUT_STD))
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return grub_errno;
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/* Write the packet. */
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grub_ata_pio_write (dev, packet, 12);
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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grub_ata_identify (struct grub_ata_device *dev)
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{
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char *info;
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grub_uint16_t *info16;
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info = grub_malloc (GRUB_DISK_SECTOR_SIZE);
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if (! info)
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return grub_errno;
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info16 = (grub_uint16_t *) info;
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grub_ata_regset (dev, GRUB_ATA_REG_DISK, 0xE0 | dev->device << 4);
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if (grub_ata_check_ready (dev))
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{
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grub_free (info);
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return grub_errno;
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}
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grub_ata_regset (dev, GRUB_ATA_REG_CMD, GRUB_ATA_CMD_IDENTIFY_DEVICE);
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grub_ata_wait ();
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if (grub_ata_wait_drq (dev, 0, GRUB_ATA_TOUT_STD))
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{
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if (grub_ata_regget (dev, GRUB_ATA_REG_ERROR) & 0x04) /* ABRT */
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{
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/* Device without ATA IDENTIFY, try ATAPI. */
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grub_free(info);
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grub_errno = GRUB_ERR_NONE;
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return grub_atapi_identify (dev);
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}
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else
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{
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/* Error. */
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grub_free(info);
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return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
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"device can not be identified");
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}
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}
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grub_ata_pio_read (dev, info, GRUB_DISK_SECTOR_SIZE);
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/* Now it is certain that this is not an ATAPI device. */
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dev->atapi = 0;
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/* CHS is always supported. */
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dev->addr = GRUB_ATA_CHS;
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/* Check if LBA is supported. */
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if (info16[49] & (1 << 9))
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{
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/* Check if LBA48 is supported. */
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if (info16[83] & (1 << 10))
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dev->addr = GRUB_ATA_LBA48;
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else
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dev->addr = GRUB_ATA_LBA;
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}
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/* Determine the amount of sectors. */
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if (dev->addr != GRUB_ATA_LBA48)
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dev->size = grub_le_to_cpu32(*((grub_uint32_t *) &info16[60]));
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else
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dev->size = grub_le_to_cpu64(*((grub_uint64_t *) &info16[100]));
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/* Read CHS information. */
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dev->cylinders = info16[1];
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dev->heads = info16[3];
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dev->sectors_per_track = info16[6];
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grub_ata_dumpinfo (dev, info);
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grub_free(info);
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return 0;
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}
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static grub_err_t
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grub_ata_device_initialize (int port, int device, int addr, int addr2)
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{
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struct grub_ata_device *dev;
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struct grub_ata_device **devp;
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grub_dprintf ("ata", "detecting device %d,%d (0x%x, 0x%x)\n",
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port, device, addr, addr2);
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dev = grub_malloc (sizeof(*dev));
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if (! dev)
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return grub_errno;
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/* Setup the device information. */
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dev->port = port;
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dev->device = device;
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dev->ioaddress = addr;
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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
|
||
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)
|
||
{
|
||
(void) mod; /* To stop warning. */
|
||
|
||
/* 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);
|
||
}
|