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Don't try to read too many blocks on MMC readcd.

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rocky
2005-02-28 02:56:26 +00:00
parent 4d393869ba
commit 99332fbd44
1 changed files with 32 additions and 8 deletions
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38
lib/driver/mmc.c
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@@ -1,6 +1,6 @@
/* Common Multimedia Command (MMC) routines.
$Id: mmc.c,v 1.15 2005/02/18 09:49:14 rocky Exp $
$Id: mmc.c,v 1.16 2005/02/28 02:56:26 rocky Exp $
Copyright (C) 2004, 2005 Rocky Bernstein <rocky@panix.com>
@@ -1012,6 +1012,12 @@ mmc_have_interface( CdIo_t *p_cdio, mmc_feature_interface_t e_interface )
return dunno;
}
/* Maximum blocks to retrieve. Would be nice to customize this based on
drive capabilities.
*/
#define MAX_CD_READ_BLOCKS 16
#define CD_READ_TIMEOUT_MS DEFAULT_TIMEOUT_MS * (MAX_CD_READ_BLOCKS/2)
/*! issue a MMC READ_CD command.
*/
driver_return_code_t
@@ -1028,7 +1034,6 @@ mmc_read_cd ( const CdIo_t *p_cdio, void *p_buf, lsn_t i_lsn,
uint8_t i_read_type = 0;
uint8_t cdb9 = 0;
if (!p_cdio) return DRIVER_OP_UNINIT;
if (!p_cdio->op.run_mmc_cmd ) return DRIVER_OP_UNSUPPORTED;
@@ -1040,7 +1045,6 @@ mmc_read_cd ( const CdIo_t *p_cdio, void *p_buf, lsn_t i_lsn,
if (b_digital_audio_play) i_read_type |= 0x2;
CDIO_MMC_SET_READ_TYPE (cdb.field, i_read_type);
CDIO_MMC_SET_READ_LBA (cdb.field, i_lsn);
CDIO_MMC_SET_READ_LENGTH24(cdb.field, i_blocks);
@@ -1052,11 +1056,31 @@ mmc_read_cd ( const CdIo_t *p_cdio, void *p_buf, lsn_t i_lsn,
cdb.field[9] = cdb9;
cdb.field[10] = (subchannel_selection & 7);
return run_mmc_cmd (p_cdio->env, DEFAULT_TIMEOUT_MS,
mmc_get_cmd_len(cdb.field[0]), &cdb,
{
unsigned int j = 0;
int i_ret = DRIVER_OP_SUCCESS;
const uint8_t i_cdb = mmc_get_cmd_len(cdb.field[0]);
while (i_blocks > 0) {
const unsigned i_blocks2 = (i_blocks > MAX_CD_READ_BLOCKS)
? MAX_CD_READ_BLOCKS : i_blocks;
void *p_buf2 = ((char *)p_buf ) + (j * i_blocksize);
CDIO_MMC_SET_READ_LBA (cdb.field, (i_lsn+j));
i_ret = run_mmc_cmd (p_cdio->env, CD_READ_TIMEOUT_MS,
i_cdb, &cdb,
SCSI_MMC_DATA_READ,
i_blocksize * i_blocks,
p_buf);
i_blocksize * i_blocks2,
p_buf2);
if (i_ret) return i_ret;
i_blocks -= i_blocks2;
j += i_blocks2;
}
return i_ret;
}
}
/*! Read sectors using SCSI-MMC GPCMD_READ_CD.