Signed-off-by: Aaron Lu <aaron.lu@xxxxxxx> --- drivers/scsi/sr.c | 23 +++++++++++++++++++++++ drivers/scsi/sr.h | 1 + include/linux/cdrom.h | 43 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 67 insertions(+) diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c index 5fc97d2..abfefab 100644 --- a/drivers/scsi/sr.c +++ b/drivers/scsi/sr.c @@ -101,6 +101,7 @@ static DEFINE_MUTEX(sr_ref_mutex); static int sr_open(struct cdrom_device_info *, int); static void sr_release(struct cdrom_device_info *); +static void check_dbml(struct scsi_cd *); static void get_sectorsize(struct scsi_cd *); static void get_capabilities(struct scsi_cd *); @@ -728,6 +729,28 @@ fail: return error; } +static void check_dbml(struct scsi_cd *cd) +{ + struct packet_command cgc; + unsigned char buffer[16]; + struct rm_feature_desc *rfd; + + init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); + cgc.cmd[0] = GPCMD_GET_CONFIGURATION; + cgc.cmd[3] = CDF_RM; + cgc.cmd[8] = sizeof(buffer); + cgc.quiet = 1; + + if (cd->cdi.ops->generic_packet(&cd->cdi, &cgc)) + return; + + rfd = (struct rm_feature_desc *)&buffer[sizeof(struct feature_header)]; + if (be16_to_cpu(rfd->feature_code) != CDF_RM) + return; + + if (rfd->dbml) + cd->dbml = 1; +} static void get_sectorsize(struct scsi_cd *cd) { diff --git a/drivers/scsi/sr.h b/drivers/scsi/sr.h index 37c8f6b..7cc40ad 100644 --- a/drivers/scsi/sr.h +++ b/drivers/scsi/sr.h @@ -41,6 +41,7 @@ typedef struct scsi_cd { unsigned readcd_known:1; /* drive supports READ_CD (0xbe) */ unsigned readcd_cdda:1; /* reading audio data using READ_CD */ unsigned media_present:1; /* media is present */ + unsigned dbml:1; /* generates device busy class events */ /* GET_EVENT spurious event handling, blk layer guarantees exclusion */ int tur_mismatch; /* nr of get_event TUR mismatches */ diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h index dfd7f18..962be39 100644 --- a/include/linux/cdrom.h +++ b/include/linux/cdrom.h @@ -727,6 +727,7 @@ struct request_sense { /* * feature profile */ +#define CDF_RM 0x0003 /* "Removable Medium" */ #define CDF_RWRT 0x0020 /* "Random Writable" */ #define CDF_HWDM 0x0024 /* "Hardware Defect Management" */ #define CDF_MRW 0x0028 @@ -739,6 +740,48 @@ struct request_sense { #define CDM_MRW_BGFORMAT_ACTIVE 2 #define CDM_MRW_BGFORMAT_COMPLETE 3 +/* Removable medium feature descriptor */ +struct rm_feature_desc { + __be16 feature_code; +#if defined(__BIG_ENDIAN_BITFIELD) + __u8 reserved1 : 2; + __u8 feature_version : 4; + __u8 persistent : 1; + __u8 curr : 1; +#elif defined(__LITTLE_ENDIAN_BITFIELD) + __u8 curr : 1; + __u8 persistent : 1; + __u8 feature_version : 4; + __u8 reserved1 : 2; +#endif + __u8 add_len; +#if defined(__BIG_ENDIAN_BITFIELD) + __u8 mech_type : 3; + __u8 load : 1; + __u8 eject : 1; + __u8 pvnt_jmpr : 1; + __u8 dbml : 1; + __u8 lock : 1; +#elif defined(__LITTLE_ENDIAN_BITFIELD) + __u8 lock : 1; + __u8 dbml : 1; + __u8 pvnt_jmpr : 1; + __u8 eject : 1; + __u8 load : 1; + __u8 mech_type : 3; +#endif + __u8 reserved2; + __u8 reserved3; + __u8 reserved4; +}; + +struct device_busy_event_desc { + __u8 device_busy_event : 4; + __u8 reserved1 : 4; + __u8 device_busy_status; + __u8 time; +}; + /* * mrw address spaces */ -- 1.7.11.3 -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html