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Add mmc_get_disc_erasable courtesy of Frank Endres.

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This commit is contained in:
R. Bernstein
2010-01-28 19:38:34 -05:00
parent 2a125e3471
commit edf69959c1
6 changed files with 263 additions and 215 deletions
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299
lib/driver/mmc.c
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@@ -1,7 +1,4 @@
/* Common Multimedia Command (MMC) routines.
$Id: mmc.c,v 1.40 2008/05/09 09:54:39 edsdead Exp $
Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010
Rocky Bernstein <rocky@gnu.org>
@@ -580,60 +577,6 @@ mmc_set_blocksize_private ( void *p_env,
/***********************************************************
User-accessible Operations.
************************************************************/
/**
Return the number of length in bytes of the Command Descriptor
buffer (CDB) for a given MMC command. The length will be
either 6, 10, or 12.
*/
uint8_t
mmc_get_cmd_len(uint8_t scsi_cmd)
{
static const uint8_t scsi_cdblen[8] = {6, 10, 10, 12, 12, 12, 10, 10};
return scsi_cdblen[((scsi_cmd >> 5) & 7)];
}
/**
Return the size of the CD in logical block address (LBA) units.
@param p_cdio the CD object to be acted upon.
@return the lsn. On error 0 or CDIO_INVALD_LSN.
*/
lsn_t
mmc_get_disc_last_lsn ( const CdIo_t *p_cdio )
{
mmc_cdb_t cdb = {{0, }};
uint8_t buf[12] = { 0, };
lsn_t retval = 0;
int i_status;
/* Operation code */
CDIO_MMC_SET_COMMAND(cdb.field, CDIO_MMC_GPCMD_READ_TOC);
cdb.field[1] = 0; /* lba; msf: 0x2 */
/* Format */
cdb.field[2] = CDIO_MMC_READTOC_FMT_TOC;
CDIO_MMC_SET_START_TRACK(cdb.field, CDIO_CDROM_LEADOUT_TRACK);
CDIO_MMC_SET_READ_LENGTH16(cdb.field, sizeof(buf));
i_status = mmc_run_cmd(p_cdio, mmc_timeout_ms, &cdb, SCSI_MMC_DATA_READ,
sizeof(buf), buf);
if (i_status) return CDIO_INVALID_LSN;
{
int i;
for (i = 8; i < 12; i++) {
retval <<= 8;
retval += buf[i];
}
}
return retval;
}
/**
Read Audio Subchannel information
@@ -679,6 +622,132 @@ mmc_audio_read_subchannel (CdIo_t *p_cdio, cdio_subchannel_t *p_subchannel)
return i_rc;
}
/**
Get the block size used in read requests, via MMC (e.g. READ_10,
READ_MSF, ...)
@param p_cdio the CD object to be acted upon.
@return the blocksize if > 0; error if <= 0
*/
int
mmc_get_blocksize ( CdIo_t *p_cdio)
{
int i_status;
uint8_t buf[255] = { 0, };
uint8_t *p;
/* First try using the 6-byte MODE SENSE command. */
i_status = mmc_mode_sense_6(p_cdio, buf, sizeof(buf),
CDIO_MMC_R_W_ERROR_PAGE);
if (DRIVER_OP_SUCCESS == i_status && buf[3]>=8) {
p = &buf[4+5];
return CDIO_MMC_GET_LEN16(p);
}
/* Next try using the 10-byte MODE SENSE command. */
i_status = mmc_mode_sense_10(p_cdio, buf, sizeof(buf),
CDIO_MMC_R_W_ERROR_PAGE);
p = &buf[6];
if (DRIVER_OP_SUCCESS == i_status && CDIO_MMC_GET_LEN16(p)>=8) {
return CDIO_MMC_GET_LEN16(p);
}
#ifdef IS_THIS_CORRECT
/* Lastly try using the READ CAPACITY command. */
{
lba_t lba = 0;
uint16_t i_blocksize;
i_status = mmc_read_capacity(p_cdio, &lba, &i_blocksize);
if ( DRIVER_OP_SUCCESS == i_status )
return i_blocksize;
#endif
return DRIVER_OP_UNSUPPORTED;
}
/**
Return the number of length in bytes of the Command Descriptor
buffer (CDB) for a given MMC command. The length will be
either 6, 10, or 12.
*/
uint8_t
mmc_get_cmd_len(uint8_t scsi_cmd)
{
static const uint8_t scsi_cdblen[8] = {6, 10, 10, 12, 12, 12, 10, 10};
return scsi_cdblen[((scsi_cmd >> 5) & 7)];
}
/**
Detects if a disc (CD or DVD) is erasable or not.
@param p_user_data the CD object to be acted upon.
@return true if the disc is detected as erasable (rewritable), false
otherwise.
*/
bool
mmc_get_disc_erasable( const CdIo_t *p_cdio ) {
mmc_cdb_t cdb = {{0, }};
uint8_t buf[42] = { 0, };
int i_status;
CDIO_MMC_SET_COMMAND (cdb.field, CDIO_MMC_GPCMD_READ_DISC_INFO);
CDIO_MMC_SET_READ_LENGTH8 (cdb.field, sizeof(buf));
i_status = mmc_run_cmd (p_cdio, 0, &cdb, SCSI_MMC_DATA_READ,
sizeof(buf), &buf);
if (i_status == 0) {
if (buf[2] & 0x10)
return true;
else
return false;
} else
return false;
}
/**
Return the size of the CD in logical block address (LBA) units.
@param p_cdio the CD object to be acted upon.
@return the lsn. On error 0 or CDIO_INVALD_LSN.
*/
lsn_t
mmc_get_disc_last_lsn ( const CdIo_t *p_cdio )
{
mmc_cdb_t cdb = {{0, }};
uint8_t buf[12] = { 0, };
lsn_t retval = 0;
int i_status;
/* Operation code */
CDIO_MMC_SET_COMMAND(cdb.field, CDIO_MMC_GPCMD_READ_TOC);
cdb.field[1] = 0; /* lba; msf: 0x2 */
/* Format */
cdb.field[2] = CDIO_MMC_READTOC_FMT_TOC;
CDIO_MMC_SET_START_TRACK(cdb.field, CDIO_CDROM_LEADOUT_TRACK);
CDIO_MMC_SET_READ_LENGTH16(cdb.field, sizeof(buf));
i_status = mmc_run_cmd(p_cdio, mmc_timeout_ms, &cdb, SCSI_MMC_DATA_READ,
sizeof(buf), buf);
if (i_status) return CDIO_INVALID_LSN;
{
int i;
for (i = 8; i < 12; i++) {
retval <<= 8;
retval += buf[i];
}
}
return retval;
}
/**
Return the discmode as reported by the SCSI-MMC Read (FULL) TOC
command.
@@ -972,6 +1041,40 @@ int mmc_get_tray_status(const CdIo_t *p_cdio)
return (status_buf[1] & 0x01) ? 1 : 0;
}
/* Added in version 0.83 by scdbackup */
/**
Obtain the SCSI sense reply of the most-recently-performed MMC command.
These bytes give an indication of possible problems which occured in
the drive while the command was performed. With some commands they tell
about the current state of the drive (e.g. 00h TEST UNIT READY).
@param sense returns the sense bytes received from the drive.
This is allocated memory or NULL if no sense bytes are
available. Dispose non-NULL pointers by free() when
no longer needed.
See SPC-3 4.5.3 Fixed format sense data.
SCSI error codes as of SPC-3 Annex D, MMC-5 Annex F:
sense[2]&15 = Key , sense[12] = ASC , sense[13] = ASCQ
@return number of valid bytes in sense,
0 in case of no sense bytes available,
<0 in case of internal error.
*/
int
mmc_last_cmd_sense( const CdIo_t *p_cdio, unsigned char **sense)
{
generic_img_private_t *gen;
if (!p_cdio) return DRIVER_OP_UNINIT;
gen = p_cdio->env;
*sense = NULL;
if (gen->scsi_mmc_sense_valid <= 0)
return 0;
*sense = calloc(1, gen->scsi_mmc_sense_valid);
if (*sense == NULL)
return DRIVER_OP_ERROR;
memcpy(*sense, gen->scsi_mmc_sense, gen->scsi_mmc_sense_valid);
return gen->scsi_mmc_sense_valid;
}
/**
Run a MMC command.
@@ -1019,6 +1122,7 @@ mmc_run_cmd( const CdIo_t *p_cdio, unsigned int i_timeout_ms,
@return 0 if command completed successfully.
*/
driver_return_code_t
mmc_run_cmd_len( const CdIo_t *p_cdio, unsigned int i_timeout_ms,
const mmc_cdb_t *p_cdb, unsigned int i_cdb,
@@ -1032,87 +1136,6 @@ mmc_run_cmd_len( const CdIo_t *p_cdio, unsigned int i_timeout_ms,
p_cdb, e_direction, i_buf, p_buf);
}
/* Added in version 0.83 by scdbackup */
/**
Obtain the SCSI sense reply of the most-recently-performed MMC command.
These bytes give an indication of possible problems which occured in
the drive while the command was performed. With some commands they tell
about the current state of the drive (e.g. 00h TEST UNIT READY).
@param sense returns the sense bytes received from the drive.
This is allocated memory or NULL if no sense bytes are
available. Dispose non-NULL pointers by free() when
no longer needed.
See SPC-3 4.5.3 Fixed format sense data.
SCSI error codes as of SPC-3 Annex D, MMC-5 Annex F:
sense[2]&15 = Key , sense[12] = ASC , sense[13] = ASCQ
@return number of valid bytes in sense,
0 in case of no sense bytes available,
<0 in case of internal error.
*/
int
mmc_last_cmd_sense( const CdIo_t *p_cdio, unsigned char **sense)
{
generic_img_private_t *gen;
if (!p_cdio) return DRIVER_OP_UNINIT;
gen = p_cdio->env;
*sense = NULL;
if (gen->scsi_mmc_sense_valid <= 0)
return 0;
*sense = calloc(1, gen->scsi_mmc_sense_valid);
if (*sense == NULL)
return DRIVER_OP_ERROR;
memcpy(*sense, gen->scsi_mmc_sense, gen->scsi_mmc_sense_valid);
return gen->scsi_mmc_sense_valid;
}
/**
Get the block size used in read requests, via MMC (e.g. READ_10,
READ_MSF, ...)
@param p_cdio the CD object to be acted upon.
@return the blocksize if > 0; error if <= 0
*/
int
mmc_get_blocksize ( CdIo_t *p_cdio)
{
int i_status;
uint8_t buf[255] = { 0, };
uint8_t *p;
/* First try using the 6-byte MODE SENSE command. */
i_status = mmc_mode_sense_6(p_cdio, buf, sizeof(buf),
CDIO_MMC_R_W_ERROR_PAGE);
if (DRIVER_OP_SUCCESS == i_status && buf[3]>=8) {
p = &buf[4+5];
return CDIO_MMC_GET_LEN16(p);
}
/* Next try using the 10-byte MODE SENSE command. */
i_status = mmc_mode_sense_10(p_cdio, buf, sizeof(buf),
CDIO_MMC_R_W_ERROR_PAGE);
p = &buf[6];
if (DRIVER_OP_SUCCESS == i_status && CDIO_MMC_GET_LEN16(p)>=8) {
return CDIO_MMC_GET_LEN16(p);
}
#ifdef IS_THIS_CORRECT
/* Lastly try using the READ CAPACITY command. */
{
lba_t lba = 0;
uint16_t i_blocksize;
i_status = mmc_read_capacity(p_cdio, &lba, &i_blocksize);
if ( DRIVER_OP_SUCCESS == i_status )
return i_blocksize;
#endif
return DRIVER_OP_UNSUPPORTED;
}
/**
Load or Unload media using a MMC START STOP command.

3
lib/driver/mmc_private.h
View File

@@ -1,7 +1,4 @@
/* private MMC helper routines.
$Id: mmc_private.h,v 1.12 2008/04/22 15:29:12 karl Exp $
Copyright (C) 2004, 2005, 2006, 2008 Rocky Bernstein <rocky@gnu.org>
This program is free software: you can redistribute it and/or modify