Initial working, but messy and incomplete, cd rom session disk scanner module
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2326 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Tyler Dauwalder
parent
22aef14b93
commit
4267a32ec4
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@ -0,0 +1,461 @@
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// cdrom.c
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <ByteOrder.h>
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#include <fs_device.h>
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#include <KernelExport.h>
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#include <scsi.h>
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#include <disk_scanner/session.h>
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#define TRACE(x)
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//#define TRACE(x) dprintf x
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static void dump_full_table_of_contents(uchar *data, uint16 data_length);
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#define ISO9660_SESSION_MODULE_NAME "disk_scanner/session/cdrom/v1"
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static const char *kModuleDebugName = "session/cdrom";
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/*! \brief raw_device_command flags
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This is the only combination of flags that works on my system. :-)
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*/
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const uint8 kScsiFlags = B_RAW_DEVICE_DATA_IN
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| B_RAW_DEVICE_REPORT_RESIDUAL
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| B_RAW_DEVICE_SHORT_READ_VALID;
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/*! \brief Timeout value used when making scsi commands
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*/
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const uint32 kScsiTimeout = 1000000;
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//! SCSI "READ TOC/PMA/ATIP" command struct
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typedef struct {
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uint8 command; //!< 0x43 == READ TOC/PMA/ATIP
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uint8 reserved2:1,
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msf:1, //!< addressing format: 0 == LBA, 1 == MSF; try lba first, then msf if that fails
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reserved1:3,
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reserved0:3;
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uint8 format:4, //!< sub-command: 0x0 == "TOC", 0x1 == "Session Info", 0x2 == "Full TOC"
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reserved3:4;
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uint8 reserved4;
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uint8 reserved5;
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uint8 reserved6;
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uint8 number; //!< track/session number
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uint16 length; //!< length of data buffer passed in raw_device_command.data; BIG-ENDIAN!!!
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uint8 control; //!< control codes; 0x0 should be fine
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} __attribute__((packed)) scsi_table_of_contents_command;
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// formats of interest
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const uint8 kTableOfContentsFormat = 0x00;
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const uint8 kSessionFormat = 0x01;
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const uint8 kFullTableOfContentsFormat = 0x10;
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/*! \brief Minutes:Seconds:Frames format address
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*/
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typedef struct {
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uint8 reserved;
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uint8 minutes;
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uint8 seconds;
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uint8 frames;
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} msf_address;
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#define CDROM_FRAMES_PER_SECOND (75)
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#define CDROM_FRAMES_PER_MINUTE (CDROM_FRAMES_PER_SECOND*60)
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static
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inline
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msf_address
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make_msf_address(uint8 minutes, uint8 seconds, uint8 frames)
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{
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msf_address result;
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result.reserved = 0;
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result.minutes = minutes;
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result.seconds = seconds;
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result.frames = frames;
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return result;
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}
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static
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inline
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uint32
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msf_to_lba(msf_address msf)
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{
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return (CDROM_FRAMES_PER_MINUTE * msf.minutes)
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+ (CDROM_FRAMES_PER_SECOND * msf.seconds)
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+ msf.frames - 150;
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}
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/*! \brief Header for data returned by all formats of SCSI
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"READ TOC/PMA/ATIP" command.
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*/
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typedef struct {
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uint16 length; //!< Length of data in reply (not including these 2 bytes); BIG ENDIAN!!!
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uint8 first; //!< First track/session in reply
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uint8 last; //!< Last track/session in reply
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} cdrom_table_of_contents_header;
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/*! Type of entries returned by "READ TOC/PMA/ATIP" when called with format
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\c kTableOfContentsFormat == 0x00
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*/
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typedef struct {
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uint8 reserved0;
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uint8 control:4,
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adr:4;
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uint8 track_number;
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uint8 reserved1;
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uint32 address;
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} cdrom_table_of_contents_entry;
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/*! Type of entries returned by "READ TOC/PMA/ATIP" when called with format
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\c kFullTableOfContentsFormat == 0x10
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*/
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typedef struct {
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uint8 session;
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uint8 control:4,
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adr:4;
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uint8 tno;
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uint8 point;
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uint8 minutes;
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uint8 seconds;
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uint8 frames;
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uint8 zero;
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uint8 pminutes;
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uint8 pseconds;
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uint8 pframes;
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} cdrom_full_table_of_contents_entry;
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// std_ops
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static
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status_t
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std_ops(int32 op, ...)
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{
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TRACE(("%s: std_ops(0x%lx)\n", kModuleDebugName, op));
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switch(op) {
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case B_MODULE_INIT:
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case B_MODULE_UNINIT:
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return B_OK;
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}
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return B_ERROR;
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}
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// read_block
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static
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status_t
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read_block(int fd, off_t offset, size_t size, uchar **block)
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{
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status_t error = (block && size > 0 ? B_OK : B_BAD_VALUE);
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if (error == B_OK) {
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*block = malloc(size);
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if (*block) {
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if (read_pos(fd, offset, *block, size) != (ssize_t)size) {
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error = errno;
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if (error == B_OK)
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error = B_ERROR;
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free(*block);
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*block = NULL;
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}
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} else
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error = B_NO_MEMORY;
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}
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return error;
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}
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static
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void
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dump_scsi_command(raw_device_command *cmd) {
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int i;
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int j;
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scsi_table_of_contents_command *scsi_command = (scsi_table_of_contents_command*)(&(cmd->command));
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for (i = 0; i < cmd->command_length; i++)
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TRACE(("%.2x,", cmd->command[i]));
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TRACE(("\n"));
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TRACE(("raw_device_command:\n"));
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TRACE((" command:\n"));
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TRACE((" command = %d (0x%.2x)\n", scsi_command->command, scsi_command->command));
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TRACE((" msf = %d\n", scsi_command->msf));
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TRACE((" format = %d (0x%.2x)\n", scsi_command->format, scsi_command->format));
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TRACE((" number = %d\n", scsi_command->number));
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TRACE((" length = %d\n", B_BENDIAN_TO_HOST_INT16(scsi_command->length)));
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TRACE((" control = %d\n", scsi_command->control));
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TRACE((" command_length = %ld\n", cmd->command_length));
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TRACE((" flags = %ld\n", cmd->flags));
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TRACE((" scsi_status = 0x%lx\n", cmd->scsi_status));
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TRACE((" cam_status = 0x%lx\n", cmd->cam_status));
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TRACE((" data = %p\n", cmd->data));
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TRACE((" data_length = %ld\n", cmd->data_length));
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TRACE((" sense_data = %p\n", cmd->sense_data));
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TRACE((" sense_data_length = %ld\n", cmd->sense_data_length));
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TRACE((" timeout = %ld\n", cmd->timeout));
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TRACE(("data dump:\n"));
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for (j = 0; j < 2048; j++) {//cmd->data_length; j++) {
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uchar c = ((uchar*)cmd->data)[j];
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if (('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || ('0' <= c && c <= '9'))
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TRACE(("\\%c,", c));
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else
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TRACE(("%.2x,", c));
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}
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TRACE(("\n"));
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TRACE(("sense_data dump:\n"));
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for (j = 0; j < cmd->sense_data_length; j++) {
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uchar c = ((uchar*)cmd->sense_data)[j];
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if (('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || ('0' <= c && c <= '9'))
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TRACE(("%c", c));
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else if (c == 0)
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TRACE(("_"));
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else
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TRACE(("-"));
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}
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TRACE(("\n"));
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}
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// cdrom_identify
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static
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bool
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cdrom_session_identify(int deviceFD, off_t deviceSize, int32 blockSize)
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{
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device_geometry geometry;
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bool result = false;
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if (ioctl(deviceFD, B_GET_GEOMETRY, &geometry) == 0)
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result = (geometry.device_type == B_CD);
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else
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dprintf("WARNING: %s: Unable to get device geometry\n", kModuleDebugName);
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return result;
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}
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// cdrom_session_get_nth_info
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static
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status_t
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read_table_of_contents(int deviceFD, uint32 first_session, uchar *buffer,
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uint16 buffer_length, bool msf)
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{
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raw_device_command raw_command;
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scsi_table_of_contents_command *scsi_command = NULL;
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const uint32 sense_data_length = 1024;
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uchar sense_data[sense_data_length];
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status_t error = buffer ? B_OK : B_BAD_VALUE;
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scsi_table_of_contents_command cmdo;
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TRACE(("%s: read_table_of_contents: (%d, %p, %ld)\n", kModuleDebugName,
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deviceFD, buffer, buffer_length));
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if (error)
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return error;
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memset(raw_command.command, 0, 16);
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scsi_command = (scsi_table_of_contents_command*)(raw_command.command);
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cmdo.command = 0x43;
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cmdo.msf = 0;
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cmdo.format = 2;
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cmdo.number = first_session;
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cmdo.length = B_HOST_TO_BENDIAN_INT16(buffer_length);
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cmdo.control = 0;
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cmdo.reserved0 = cmdo.reserved1 = cmdo.reserved2 = cmdo.reserved3 = cmdo.reserved4
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= cmdo.reserved5 = cmdo.reserved6 = 0;
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/* scsi_command->command = 0x43;
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scsi_command->msf = msf;
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dprintf("format == 0x%lx\n", scsi_command->format);
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scsi_command->format = 0x10;//kFullTableOfContentsFormat;
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dprintf("format == 0x%lx\n", scsi_command->format);
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scsi_command->number = 0;
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scsi_command->length = B_HOST_TO_BENDIAN_INT16(buffer_length);
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scsi_command->control = 0;
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scsi_command->reserved0 = scsi_command->reserved1 = scsi_command->reserved2
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= scsi_command->reserved3 = scsi_command->reserved4
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= scsi_command->reserved5 = scsi_command->reserved6 = 0;
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*/
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memcpy(raw_command.command, &cmdo, sizeof(cmdo));
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raw_command.command_length = 10;
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raw_command.flags = kScsiFlags;
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raw_command.scsi_status = 0;
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raw_command.cam_status = 0;
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raw_command.data = buffer;
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raw_command.data_length = buffer_length;
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memset(raw_command.data, 0, raw_command.data_length);
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raw_command.sense_data = sense_data;
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raw_command.sense_data_length = sense_data_length;
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memset(raw_command.sense_data, 0, raw_command.sense_data_length);
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raw_command.timeout = kScsiTimeout;
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dump_scsi_command((uchar*)&raw_command);
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if (ioctl(deviceFD, B_RAW_DEVICE_COMMAND, &raw_command) == 0) {
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dump_scsi_command((uchar*)&raw_command);
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if (raw_command.scsi_status == 0 && raw_command.cam_status == 1) {
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// SUCCESS!!!
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// dump_full_table_of_contents(buffer, buffer_length);
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} else {
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error = B_FILE_ERROR;
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TRACE(("%s: scsi ioctl succeeded, but scsi command failed\n",
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kModuleDebugName));
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}
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} else {
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error = errno;
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TRACE(("%s: scsi command failed with error 0x%lx\n", kModuleDebugName,
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error));
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}
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return error;
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}
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static
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void
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dump_full_table_of_contents(uchar *data, uint16 data_length)
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{
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cdrom_table_of_contents_header *header;
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cdrom_full_table_of_contents_entry *entries;
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int i, count;
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header = (cdrom_table_of_contents_header*)data;
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entries = (cdrom_full_table_of_contents_entry*)(data+4);
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header->length = B_BENDIAN_TO_HOST_INT16(header->length);
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if (data_length < header->length) {
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TRACE(("dump_full_table_of_contents: warning, data buffer not large enough (%ld < %ld)\n",
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data_length, header->length));
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header->length = data_length;
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}
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TRACE(("header:\n"));
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TRACE((" length = %d\n", header->length));
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TRACE((" first = %d\n", header->first));
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TRACE((" last = %d\n", header->last));
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count = (header->length-2) / sizeof(cdrom_full_table_of_contents_entry);
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TRACE(("\n"));
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TRACE(("entry count = %d\n", count));
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TRACE(("\n"));
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for (i = 0; i < count; i++) {
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TRACE(("entry #%d:\n", i));
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TRACE((" session = %d\n", entries[i].session));
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TRACE((" adr = %d\n", entries[i].adr));
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TRACE((" control = %d\n", entries[i].control));
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TRACE((" tno = %d\n", entries[i].tno));
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TRACE((" point = %d (0x%.2x)\n", entries[i].point, entries[i].point));
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TRACE((" minutes = %d\n", entries[i].minutes));
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TRACE((" frames = %d\n", entries[i].seconds));
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TRACE((" seconds = %d\n", entries[i].frames));
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TRACE((" zero = %d\n", entries[i].zero));
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TRACE((" pminutes = %d\n", entries[i].pminutes));
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TRACE((" pseconds = %d\n", entries[i].pseconds));
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TRACE((" pframes = %d\n", entries[i].pframes));
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TRACE((" lba = %ld\n", msf_to_lba(make_msf_address(entries[i].pminutes,
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entries[i].pseconds, entries[i].pframes))));
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TRACE(("\n"));
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}
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}
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// cdrom_get_nth_info
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static
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status_t
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cdrom_session_get_nth_info(int deviceFD, int32 index, off_t deviceSize,
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int32 blockSize, struct session_info *sessionInfo)
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{
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status_t error = sessionInfo && index >= 0 ? B_OK : B_BAD_VALUE;
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uchar data[2048];
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int32 session = index+1;
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off_t start_lba = 0;
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off_t end_lba = 0;
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TRACE(("%s: get_nth_info(%d, %ld, %lld, %ld, %p)\n", kModuleDebugName,
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deviceFD, index, deviceSize, blockSize, sessionInfo));
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// As with identify(), this is just a bogus function that
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// treats the whole device as a single session.
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if (!error) {
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error = read_table_of_contents(deviceFD, index+1, data, 2048,
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false);
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}
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if (!error) {
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cdrom_table_of_contents_header *header;
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cdrom_full_table_of_contents_entry *entries;
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int i, count;
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int trace = 0;
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int first_track = session;
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header = (cdrom_table_of_contents_header*)data;
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entries = (cdrom_full_table_of_contents_entry*)(data+4);
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header->length = B_BENDIAN_TO_HOST_INT16(header->length);
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count = (header->length-2) / sizeof(cdrom_full_table_of_contents_entry);
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// Check for a valid session index
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if (session < header->first || session > header->last)
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error = B_ENTRY_NOT_FOUND;
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if (!error) {
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for (i = 0; i < count; i++) {
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switch (entries[i].point) {
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case 0xa0:
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// PMin holds first track in session
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if (entries[i].session == session)
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first_track = entries[i].pminutes;
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break;
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case 0xa2:
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// PMSF holds end of session
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if (entries[i].session == session) {
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end_lba = msf_to_lba(make_msf_address(entries[i].pminutes,
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entries[i].pseconds, entries[i].pframes));
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trace++;
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}
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break;
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default:
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if (entries[i].session == session && entries[i].point == first_track) {
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start_lba = msf_to_lba(make_msf_address(entries[i].pminutes,
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entries[i].pseconds, entries[i].pframes));
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trace++;
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}
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break;
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}
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}
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if (trace == 2) {
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TRACE(("%s: found session #%ld info\n", kModuleDebugName, session));
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sessionInfo->offset = start_lba * blockSize;
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sessionInfo->size = (end_lba - start_lba) * blockSize;
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sessionInfo->logical_block_size = blockSize;
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sessionInfo->index = index;
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sessionInfo->flags = B_DATA_SESSION; // possibly B_AUDIO_SESSION for audio tracks?
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// dump_full_table_of_contents(data);
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} else {
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dprintf("%s: bad trace: %d\n", kModuleDebugName, trace);
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error = B_ENTRY_NOT_FOUND;
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}
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}
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}
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if (error)
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dprintf("%s: get_nth error 0x%lx\n", kModuleDebugName, error);
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return error;
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}
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static session_module_info cdrom_session_module =
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{
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// module_info
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{
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ISO9660_SESSION_MODULE_NAME,
|
||||
0, // better B_KEEP_LOADED?
|
||||
std_ops
|
||||
},
|
||||
cdrom_session_identify,
|
||||
cdrom_session_get_nth_info
|
||||
};
|
||||
|
||||
_EXPORT session_module_info *modules[] =
|
||||
{
|
||||
&cdrom_session_module,
|
||||
NULL
|
||||
};
|
||||
|
||||
Loading…
Reference in New Issue