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libburn/libburn/sbc.c

135 lines
3.1 KiB

/* -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 8; -*- */
/* scsi block commands */
#include <string.h>
#include <unistd.h>
#include "transport.h"
#include "sbc.h"
#include "spc.h"
#include "options.h"
/* ts A70910
debug: for tracing calls which might use open drive fds
or for catching SCSI usage of emulated drives. */
int mmc_function_spy(struct burn_drive *d, char * text);
/* spc command set */
static unsigned char SBC_LOAD[] = { 0x1b, 0, 0, 0, 3, 0 };
static unsigned char SBC_UNLOAD[] = { 0x1b, 0, 0, 0, 2, 0 };
static unsigned char SBC_START_UNIT[] = { 0x1b, 0, 0, 0, 1, 0 };
static unsigned char SBC_STOP_UNIT[] = { 0x1b, 0, 0, 0, 0, 0 };
void sbc_load(struct burn_drive *d)
{
struct command c;
if (mmc_function_spy(d, "load") <= 0)
return;
scsi_init_command(&c, SBC_LOAD, sizeof(SBC_LOAD));
/*
memcpy(c.opcode, SBC_LOAD, sizeof(SBC_LOAD));
c.oplen = sizeof(SBC_LOAD);
c.page = NULL;
*/
c.retry = 1;
/* ts A70921 : Had to revoke Immed because of LG GSA-4082B */
/* c.opcode[1] |= 1; / * ts A70918 : Immed */
c.dir = NO_TRANSFER;
d->issue_command(d, &c);
if (c.error)
return;
/* ts A70923 : Needed regardless of Immed bit. Was once 1 minute, now
5 minutes for loading. If this does not suffice then other commands
shall fail righteously. */
spc_wait_unit_attention(d, 300, "waiting after START UNIT (+ LOAD)",0);
}
void sbc_eject(struct burn_drive *d)
{
struct command c;
if (mmc_function_spy(d, "eject") <= 0)
return;
scsi_init_command(&c, SBC_UNLOAD, sizeof(SBC_UNLOAD));
/*
memcpy(c.opcode, SBC_UNLOAD, sizeof(SBC_UNLOAD));
c.oplen = sizeof(SBC_UNLOAD);
c.page = NULL;
*/
c.opcode[1] |= 1; /* ts A70918 : Immed */
c.page = NULL;
c.dir = NO_TRANSFER;
d->issue_command(d, &c);
if (c.error)
return;
/* ts A70918 : Wait long. A late eject could surprise or hurt user. */
spc_wait_unit_attention(d, 1800, "STOP UNIT (+ EJECT)", 0);
}
/* ts A61118 : is it necessary to tell the drive to get ready for use ? */
int sbc_start_unit(struct burn_drive *d)
{
struct command c;
int ret;
if (mmc_function_spy(d, "start_unit") <= 0)
return 0;
scsi_init_command(&c, SBC_START_UNIT, sizeof(SBC_START_UNIT));
c.retry = 1;
c.opcode[1] |= 1; /* ts A70918 : Immed */
c.dir = NO_TRANSFER;
d->issue_command(d, &c);
if (c.error)
return 0;
/* ts A70918 : now asynchronous */
d->is_stopped = 0;
ret = spc_wait_unit_attention(d, 1800, "START UNIT", 0);
return ret;
}
/* ts A90824 : Trying to reduce drive noise */
int sbc_stop_unit(struct burn_drive *d)
{
struct command c;
int ret;
if (mmc_function_spy(d, "stop_unit") <= 0)
return 0;
scsi_init_command(&c, SBC_STOP_UNIT, sizeof(SBC_STOP_UNIT));
c.retry = 1;
c.opcode[1] |= 1; /* Immed */
c.dir = NO_TRANSFER;
d->issue_command(d, &c);
if (c.error)
return 0;
ret = spc_wait_unit_attention(d, 1800, "STOP UNIT", 0);
d->is_stopped = 1;
return ret;
}
/* ts A61021 : the sbc specific part of sg.c:enumerate_common()
*/
int sbc_setup_drive(struct burn_drive *d)
{
d->eject = sbc_eject;
d->load = sbc_load;
d->start_unit = sbc_start_unit;
d->stop_unit = sbc_stop_unit;
d->is_stopped = 0;
return 1;
}