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- /*
- * libdi - CD Audio Player Device Interface Library
- *
- * Copyright (C) 1995 Ti Kan
- * E-mail: ti@amb.org
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * This software module contains code that interfaces the CD player
- * application to the Linux operating system.
- */
- #ifndef LINT
- static char *_os_linux_c_ident_ = "@(#)os_linux.c 5.11 94/12/28";
- #endif
-
- #include "common.d/appenv.h"
- #include "common.d/util.h"
- #include "libdi.d/libdi.h"
- #include "libdi.d/scsipt.h"
-
- #if defined(linux) && defined(DI_SCSIPT) && !defined(DEMO_ONLY)
-
- extern appdata_t app_data;
- extern bool_t scsipt_notrom_error;
- extern FILE *errfp;
-
- STATIC int pthru_fd = -1; /* Passthrough device file desc */
-
-
- /*
- * pthru_send
- * Build SCSI CDB and send command to the device.
- *
- * Args:
- * opcode - SCSI command opcode
- * addr - The "address" portion of the SCSI CDB
- * buf - Pointer to data buffer
- * size - Number of bytes to transfer
- * rsvd - The "reserved" portion of the SCSI CDB
- * length - The "length" portion of the SCSI CDB
- * param - The "param" portion of the SCSI CDB
- * control - The "control" portion of the SCSI CDB
- * rw - Data transfer direction flag (READ_OP or WRITE_OP)
- * prnerr - Whether an error message should be displayed
- * when a command fails
- *
- * Return:
- * TRUE - command completed successfully
- * FALSE - command failed
- */
- bool_t
- pthru_send(
- byte_t opcode,
- word32_t addr,
- byte_t *buf,
- word32_t size,
- byte_t rsvd,
- word32_t length,
- byte_t param,
- byte_t control,
- byte_t rw,
- bool_t prnerr
- )
- {
- byte_t *ptbuf;
- byte_t cdb[12];
- int ptbufsz,
- cdblen,
- ret;
- req_sense_data_t *rp;
-
- if (pthru_fd < 0 || scsipt_notrom_error)
- return FALSE;
-
- /* Linux hack: use SCSI_IOCTL_TEST_UNIT_READY instead of
- * SCSI_IOCTL_SEND_COMMAND for test unit ready commands.
- */
- if (opcode == OP_S_TEST) {
- DBGPRN(errfp, "\nSending SCSI_IOCTL_TEST_UNIT_READY\n");
-
- ret = ioctl(pthru_fd, SCSI_IOCTL_TEST_UNIT_READY, NULL);
- if (ret == 0)
- return TRUE;
-
- if (app_data.scsierr_msg && prnerr) {
- fprintf(errfp,
- "SCSI_IOCTL_TEST_UNIT_READY failed: ret=0x%x\n",
- ret
- );
- }
- return FALSE;
- }
-
- memset(cdb, 0, sizeof(cdb));
-
- /* set up SCSI CDB */
- switch (opcode & 0xf0) {
- case 0xa0:
- case 0xe0:
- /* 12-byte commands */
- cdb[0] = opcode;
- cdb[1] = param;
- cdb[2] = (addr >> 24) & 0xff;
- cdb[3] = (addr >> 16) & 0xff;
- cdb[4] = (addr >> 8) & 0xff;
- cdb[5] = (addr & 0xff);
- cdb[6] = (length >> 24) & 0xff;
- cdb[7] = (length >> 16) & 0xff;
- cdb[8] = (length >> 8) & 0xff;
- cdb[9] = length & 0xff;
- cdb[10] = rsvd;
- cdb[11] = control;
-
- cdblen = 12;
- break;
-
- case 0xc0:
- case 0xd0:
- case 0x20:
- case 0x30:
- case 0x40:
- /* 10-byte commands */
- cdb[0] = opcode;
- cdb[1] = param;
- cdb[2] = (addr >> 24) & 0xff;
- cdb[3] = (addr >> 16) & 0xff;
- cdb[4] = (addr >> 8) & 0xff;
- cdb[5] = addr & 0xff;
- cdb[6] = rsvd;
- cdb[7] = (length >> 8) & 0xff;
- cdb[8] = length & 0xff;
- cdb[9] = control;
-
- cdblen = 10;
- break;
-
- case 0x00:
- case 0x10:
- /* 6-byte commands */
- cdb[0] = opcode;
- cdb[1] = param;
- cdb[2] = (addr >> 8) & 0xff;
- cdb[3] = addr & 0xff;
- cdb[4] = length & 0xff;
- cdb[5] = control;
-
- cdblen = 6;
- break;
-
- default:
- if (app_data.scsierr_msg && prnerr)
- fprintf(errfp, "0x%02x: Unknown SCSI opcode\n",
- opcode);
- return FALSE;
- }
-
- DBGDUMP("SCSI CDB bytes", cdb, cdblen);
-
-
- /* Set up SCSI pass-through command/data buffer */
- ptbufsz = (sizeof(int) << 1) + cdblen;
- if (buf != NULL && size > 0)
- ptbufsz += size;
-
- if ((ptbuf = (byte_t *) malloc(ptbufsz)) == NULL) {
- cd_fatal_popup(app_data.str_fatal, app_data.str_nomemory);
- return FALSE;
- }
-
- memset(ptbuf, 0, ptbufsz);
- memcpy(ptbuf + (sizeof(int) << 1), cdb, cdblen);
-
- if (buf != NULL && size > 0) {
- if (rw == WRITE_OP) {
- *((int *) ptbuf) = size;
- memcpy(ptbuf + (sizeof(int) << 1) + cdblen, buf, size);
- }
- else
- *(((int *) ptbuf) + 1) = size;
- }
-
- /* Send the command down via the "pass-through" interface */
- if ((ret = ioctl(pthru_fd, SCSI_IOCTL_SEND_COMMAND, ptbuf)) != 0) {
- if (app_data.scsierr_msg && prnerr) {
- fprintf(errfp, "CD audio: %s %s:\n",
- "SCSI command error on", app_data.device);
- fprintf(errfp,
- "%s=0x%x %s=0x%x %s=0x%x %s=0x%x %s=0x%x\n",
- "Opcode", opcode,
- "Status", status_byte(ret),
- "Msg", msg_byte(ret),
- "Host", host_byte(ret),
- "Driver", driver_byte(ret));
-
- rp = (req_sense_data_t *)(void *)
- (ptbuf + (sizeof(int) << 1));
-
- if (rp->valid) {
- fprintf(errfp,
- "Key=0x%x Code=0x%x Qual=0x%x\n",
- rp->key, rp->code, rp->qual);
- }
- }
-
- free(ptbuf);
- return FALSE;
- }
-
- if (buf != NULL && rw == READ_OP && size > 0)
- memcpy(buf, ptbuf + (sizeof(int) << 1), size);
-
- free(ptbuf);
- return TRUE;
- }
-
-
- /*
- * pthru_open
- * Open SCSI pass-through device
- *
- * Args:
- * path - device path name string
- *
- * Return:
- * TRUE - open successful
- * FALSE - open failed
- */
- bool_t
- pthru_open(char *path)
- {
- struct stat stbuf;
- char errstr[ERR_BUF_SZ];
- int i,
- ret;
-
- /* Force close on eject. This is because Linux's
- * SCSI_IOCTL_SEND_COMMAND ioctl does not work well
- * when there is no CD loaded...
- */
- app_data.eject_close = TRUE;
-
- /* Check for validity of device node */
- if (stat(path, &stbuf) < 0) {
- sprintf(errstr, app_data.str_staterr, path);
- cd_fatal_popup(app_data.str_fatal, errstr);
- return FALSE;
- }
-
- /* Linux CD-ROM device is a block special file! */
- if (!S_ISBLK(stbuf.st_mode)) {
- sprintf(errstr, app_data.str_noderr, path);
- cd_fatal_popup(app_data.str_fatal, errstr);
- return FALSE;
- }
-
- if ((pthru_fd = open(path, O_RDONLY | O_EXCL)) < 0) {
- DBGPRN(errfp, "Cannot open %s: errno=%d\n", path, errno);
- return FALSE;
- }
-
- /* Linux hack: The CD-ROM driver allows the open to succeed
- * even if there is no CD loaded. We test for the existence of
- * a disc with SCSI_IOCTL_TEST_UNIT_READY.
- */
- for (i = 0; i < 3; i++) {
- DBGPRN(errfp, "\nSending SCSI_IOCTL_TEST_UNIT_READY\n");
-
- ret = ioctl(pthru_fd, SCSI_IOCTL_TEST_UNIT_READY, NULL);
- if (ret == 0)
- break;
-
- if (app_data.scsierr_msg && app_data.debug) {
- fprintf(errfp,
- "SCSI_IOCTL_TEST_UNIT_READY failed: ret=0x%x\n",
- ret
- );
- }
- }
- if (ret != 0) {
- /* No CD loaded */
- pthru_close();
- return FALSE;
- }
-
- return TRUE;
- }
-
-
- /*
- * pthru_close
- * Close SCSI pass-through device
- *
- * Args:
- * Nothing.
- *
- * Return:
- * Nothing.
- */
- void
- pthru_close(void)
- {
- if (pthru_fd >= 0) {
- close(pthru_fd);
- pthru_fd = -1;
- }
- }
-
-
- /*
- * pthru_vers
- * Return OS Interface Module version string
- *
- * Args:
- * Nothing.
- *
- * Return:
- * Module version text string.
- */
- char *
- pthru_vers(void)
- {
- return ("OS Interface module (for Linux)\n");
- }
-
- #endif /* linux DI_SCSIPT DEMO_ONLY */
-
-