sbpcd.c

这是一个SIGMA方案的PMP播放器的UCLINUX程序,可播放DVD,VCD,CD MP3...有很好的参考价值.

 * auto-probing address list
 * inspired by Adam J. Richter from Yggdrasil
 *
 * still not good enough - can cause a hang.
 *   example: a NE 2000 ethernet card at 300 will cause a hang probing 310.
 * if that happens, reboot and use the LILO (kernel) command line.
 * The possibly conflicting ethernet card addresses get NOT probed 
 * by default - to minimize the hang possibilities. 
 *
 * The SB Pro addresses get "mirrored" at 0x6xx and some more locations - to
 * avoid a type error, the 0x2xx-addresses must get checked before 0x6xx.
 *
 * send mail to [e-mail] if your interface card is not FULLY
 * represented here.
 */
#if !(SBPCD_ISSUE-1)
static int sbpcd[] = 
{
	CDROM_PORT, SBPRO, /* probe with user's setup first */
#if DISTRIBUTION
	0x230, 1, /* Soundblaster Pro and 16 (default) */
#if 0
	0x300, 0, /* CI-101P (default), WDH-7001C (default),
		     Galaxy (default), Reveal (one default) */
	0x250, 1, /* OmniCD default, Soundblaster Pro and 16 */
	0x2C0, 3, /* Teac 16-bit cards */
	0x260, 1, /* OmniCD */
	0x320, 0, /* Lasermate, CI-101P, WDH-7001C, Galaxy, Reveal (other default),
		     Longshine LCS-6853 (default) */
	0x338, 0, /* Reveal Sound Wave 32 card model #SC600 */
	0x340, 0, /* Mozart sound card (default), Lasermate, CI-101P */
	0x360, 0, /* Lasermate, CI-101P */
	0x270, 1, /* Soundblaster 16 */
	0x670, 0, /* "sound card #9" */
	0x690, 0, /* "sound card #9" */
	0x338, 2, /* SPEA Media FX, Ensonic SoundScape (default) */
	0x328, 2, /* SPEA Media FX */
	0x348, 2, /* SPEA Media FX */
	0x634, 0, /* some newer sound cards */
	0x638, 0, /* some newer sound cards */
	0x230, 1, /* some newer sound cards */
	/* due to incomplete address decoding of the SbPro card, these must be last */
	0x630, 0, /* "sound card #9" (default) */
	0x650, 0, /* "sound card #9" */
#ifdef MODULE
	/*
	 * some "hazardous" locations (no harm with the loadable version)
	 * (will stop the bus if a NE2000 ethernet card resides at offset -0x10)
	 */
	0x330, 0, /* Lasermate, CI-101P, WDH-7001C */
	0x350, 0, /* Lasermate, CI-101P */
	0x358, 2, /* SPEA Media FX */
	0x370, 0, /* Lasermate, CI-101P */
	0x290, 1, /* Soundblaster 16 */
	0x310, 0, /* Lasermate, CI-101P, WDH-7001C */
#endif /* MODULE */
#endif
#endif /* DISTRIBUTION */
};
#else
static int sbpcd[] = {CDROM_PORT, SBPRO}; /* probe with user's setup only */
#endif
MODULE_PARM(sbpcd, "2i");
MODULE_PARM(max_drives, "i");

#define NUM_PROBE  (sizeof(sbpcd) / sizeof(int))

/*==========================================================================*/
/*
 * the external references:
 */
#if !(SBPCD_ISSUE-1)
#ifdef CONFIG_SBPCD2
extern int sbpcd2_init(void);
#endif
#ifdef CONFIG_SBPCD3
extern int sbpcd3_init(void);
#endif
#ifdef CONFIG_SBPCD4
extern int sbpcd4_init(void);
#endif
#endif

/*==========================================================================*/

#define INLINE inline

/*==========================================================================*/
/*
 * the forward references:
 */
static void sbp_sleep(u_int);
static void mark_timeout_delay(u_long);
static void mark_timeout_data(u_long);
#if 0
static void mark_timeout_audio(u_long);
#endif
static void sbp_read_cmd(struct request *req);
static int sbp_data(struct request *req);
static int cmd_out(void);
static int DiskInfo(void);
static int sbpcd_chk_disk_change(kdev_t);

/*==========================================================================*/

/*
 * pattern for printk selection:
 *
 * (1<<DBG_INF)  necessary information
 * (1<<DBG_BSZ)  BLOCK_SIZE trace
 * (1<<DBG_REA)  "read" status trace
 * (1<<DBG_CHK)  "media check" trace
 * (1<<DBG_TIM)  datarate timer test
 * (1<<DBG_INI)  initialization trace
 * (1<<DBG_TOC)  tell TocEntry values
 * (1<<DBG_IOC)  ioctl trace
 * (1<<DBG_STA)  "ResponseStatus" trace
 * (1<<DBG_ERR)  "cc_ReadError" trace
 * (1<<DBG_CMD)  "cmd_out" trace
 * (1<<DBG_WRN)  give explanation before auto-probing
 * (1<<DBG_MUL)  multi session code test
 * (1<<DBG_IDX)  "drive_id != 0" test code
 * (1<<DBG_IOX)  some special information
 * (1<<DBG_DID)  drive ID test
 * (1<<DBG_RES)  drive reset info
 * (1<<DBG_SPI)  SpinUp test info
 * (1<<DBG_IOS)  ioctl trace: "subchannel"
 * (1<<DBG_IO2)  ioctl trace: general
 * (1<<DBG_UPC)  show UPC info
 * (1<<DBG_XA1)  XA mode debugging
 * (1<<DBG_LCK)  door (un)lock info
 * (1<<DBG_SQ1)   dump SubQ frame
 * (1<<DBG_AUD)  "read audio" debugging
 * (1<<DBG_SEQ)  Sequoia interface configuration trace
 * (1<<DBG_LCS)  Longshine LCS-7260 debugging trace
 * (1<<DBG_CD2)  MKE/Funai CD200 debugging trace
 * (1<<DBG_TEA)  TEAC CD-55A debugging trace
 * (1<<DBG_ECS)  ECS-AT (Vertos-100) debugging trace
 * (1<<DBG_000)  unnecessary information
 */
#if DISTRIBUTION
static int sbpcd_debug = (1<<DBG_INF);
#else
static int sbpcd_debug = 0 & ((1<<DBG_INF) |
			  (1<<DBG_TOC) |
			  (1<<DBG_MUL) |
			  (1<<DBG_UPC));
#endif /* DISTRIBUTION */

static int sbpcd_ioaddr = CDROM_PORT;	/* default I/O base address */
static int sbpro_type = SBPRO;
static unsigned char f_16bit;
static unsigned char do_16bit;
static int CDo_command, CDo_reset;
static int CDo_sel_i_d, CDo_enable;
static int CDi_info, CDi_status, CDi_data;
static struct cdrom_msf msf;
static struct cdrom_ti ti;
static struct cdrom_tochdr tochdr;
static struct cdrom_tocentry tocentry;
static struct cdrom_subchnl SC;
static struct cdrom_volctrl volctrl;
static struct cdrom_read_audio read_audio;

static unsigned char msgnum;
static char msgbuf[80];

static int max_drives = MAX_DRIVES;
#ifndef MODULE
static unsigned char setup_done;
static const char *str_sb_l = "soundblaster";
static const char *str_sp_l = "spea";
static const char *str_ss_l = "soundscape";
static const char *str_t16_l = "teac16bit";
static const char *str_ss = "SoundScape";
#endif
static const char *str_sb = "SoundBlaster";
static const char *str_lm = "LaserMate";
static const char *str_sp = "SPEA";
static const char *str_t16 = "Teac16bit";
static const char *type;

#if !(SBPCD_ISSUE-1)
static const char *major_name="sbpcd";
#endif
#if !(SBPCD_ISSUE-2)
static const char *major_name="sbpcd2";
#endif
#if !(SBPCD_ISSUE-3)
static const char *major_name="sbpcd3";
#endif
#if !(SBPCD_ISSUE-4)
static const char *major_name="sbpcd4";
#endif

/*==========================================================================*/

#if FUTURE
static DECLARE_WAIT_QUEUE_HEAD(sbp_waitq);
#endif /* FUTURE */

static int teac=SBP_TEAC_SPEED;
static int buffers=SBP_BUFFER_FRAMES;

static u_char family0[]="MATSHITA"; /* MKE CR-521, CR-522, CR-523 */
static u_char family1[]="CR-56";    /* MKE CR-562, CR-563 */
static u_char family2[]="CD200";    /* MKE CD200, Funai CD200F */
static u_char familyL[]="LCS-7260"; /* Longshine LCS-7260 */
static u_char familyT[]="CD-55";    /* TEAC CD-55A */
static u_char familyV[]="ECS-AT";   /* ECS Vertos 100 */

static u_int recursion; /* internal testing only */
static u_int fatal_err; /* internal testing only */
static u_int response_count;
static u_int flags_cmd_out;
static u_char cmd_type;
static u_char drvcmd[10];
static u_char infobuf[20];
static u_char xa_head_buf[CD_XA_HEAD];
static u_char xa_tail_buf[CD_XA_TAIL];

#if OLD_BUSY
static volatile u_char busy_data;
static volatile u_char busy_audio; /* true semaphores would be safer */
#endif /* OLD_BUSY */ 
static DECLARE_MUTEX(ioctl_read_sem);
static u_long timeout;
static volatile u_char timed_out_delay;
static volatile u_char timed_out_data;
#if 0
static volatile u_char timed_out_audio;
#endif
static u_int datarate= 1000000;
static u_int maxtim16=16000000;
static u_int maxtim04= 4000000;
static u_int maxtim02= 2000000;
static u_int maxtim_8=   30000;
#if LONG_TIMING
static u_int maxtim_data= 9000;
#else
static u_int maxtim_data= 3000;
#endif /* LONG_TIMING */ 
#if DISTRIBUTION
static int n_retries=6;
#else
static int n_retries=6;
#endif
/*==========================================================================*/

static int ndrives;
static u_char drv_pattern[NR_SBPCD]={speed_auto,speed_auto,speed_auto,speed_auto};
static int sbpcd_blocksizes[NR_SBPCD];

/*==========================================================================*/
/*
 * drive space begins here (needed separate for each unit) 
 */
static int d; /* DriveStruct index: drive number */

static struct {
	char drv_id;           /* "jumpered" drive ID or -1 */
	char drv_sel;          /* drive select lines bits */
	
	char drive_model[9];
	u_char firmware_version[4];
	char f_eject;          /* auto-eject flag: 0 or 1 */
	u_char *sbp_buf;       /* Pointer to internal data buffer,
				  space allocated during sbpcd_init() */
	u_int sbp_bufsiz;      /* size of sbp_buf (# of frames) */
	int sbp_first_frame;   /* First frame in buffer */
	int sbp_last_frame;    /* Last frame in buffer  */
	int sbp_read_frames;   /* Number of frames being read to buffer */
	int sbp_current;       /* Frame being currently read */
	
	u_char mode;           /* read_mode: READ_M1, READ_M2, READ_SC, READ_AU */
	u_char *aud_buf;       /* Pointer to audio data buffer,
				  space allocated during sbpcd_init() */
	u_int sbp_audsiz;      /* size of aud_buf (# of raw frames) */
	u_int drv_type;
	u_char drv_options;
	int status_bits;
	u_char diskstate_flags;
	u_char sense_byte;
	
	u_char CD_changed;
	char open_count;
	u_char error_byte;
	
	u_char f_multisession;
	u_int lba_multi;
	int first_session;
	int last_session;
	int track_of_last_session;
	
	u_char audio_state;
	u_int pos_audio_start;
	u_int pos_audio_end;
	char vol_chan0;
	u_char vol_ctrl0;
	char vol_chan1;
	u_char vol_ctrl1;
#if 000 /* no supported drive has it */
	char vol_chan2;
	u_char vol_ctrl2;
	char vol_chan3;
	u_char vol_ctrl3;
#endif /*000 */
	u_char volume_control; /* TEAC on/off bits */
	
	u_char SubQ_ctl_adr;
	u_char SubQ_trk;
	u_char SubQ_pnt_idx;
	u_int SubQ_run_tot;
	u_int SubQ_run_trk;
	u_char SubQ_whatisthis;
	
	u_char UPC_ctl_adr;
	u_char UPC_buf[7];
	
	int frame_size;
	int CDsize_frm;
	
	u_char xa_byte; /* 0x20: XA capabilities */
	u_char n_first_track; /* binary */
	u_char n_last_track; /* binary (not bcd), 0x01...0x63 */
	u_int size_msf; /* time of whole CD, position of LeadOut track */
	u_int size_blk;
	
	u_char TocEnt_nixbyte; /* em */
	u_char TocEnt_ctl_adr;
	u_char TocEnt_number;
	u_char TocEnt_format; /* em */
	u_int TocEnt_address;
#if SAFE_MIXED
	char has_data;
#endif /* SAFE_MIXED */ 
	u_char ored_ctl_adr; /* to detect if CDROM contains data tracks */
	
	struct {
		u_char nixbyte; /* em */
		u_char ctl_adr; /* 0x4x: data, 0x0x: audio */
		u_char number;
		u_char format; /* em */ /* 0x00: lba, 0x01: msf */
		u_int address;
	} TocBuffer[MAX_TRACKS+1]; /* last entry faked */ 
	
	int in_SpinUp; /* CR-52x test flag */
	int n_bytes; /* TEAC awaited response count */
	u_char error_state, b3, b4; /* TEAC command error state */
	u_char f_drv_error; /* TEAC command error flag */
	u_char speed_byte;
	int frmsiz;
	u_char f_XA; /* 1: XA */
	u_char type_byte; /* 0, 1, 3 */
	u_char mode_xb_6;
	u_char mode_yb_7;
	u_char mode_xb_8;
	u_char delay;
	struct cdrom_device_info *sbpcd_infop;

} D_S[NR_SBPCD];

/*
 * drive space ends here (needed separate for each unit)
 */
/*==========================================================================*/
#if 0
unsigned long cli_sti; /* for saving the processor flags */
#endif
/*==========================================================================*/
static struct timer_list delay_timer = { function: mark_timeout_delay};
static struct timer_list data_timer = { function: mark_timeout_data};
#if 0
static struct timer_list audio_timer = { function: mark_timeout_audio};
#endif
/*==========================================================================*/
/*
 * DDI interface
 */
static void msg(int level, const char *fmt, ...)
{
#if DISTRIBUTION
#define MSG_LEVEL KERN_NOTICE
#else
#define MSG_LEVEL KERN_INFO
#endif /* DISTRIBUTION */

	char buf[256];
	va_list args;
	
	if (!(sbpcd_debug&(1<<level))) return;
	
	msgnum++;
	if (msgnum>99) msgnum=0;
	sprintf(buf, MSG_LEVEL "%s-%d [%02d]:  ", major_name, d, msgnum);
	va_start(args, fmt);
	vsprintf(&buf[18], fmt, args);
	va_end(args);
	printk(buf);
#if KLOGD_PAUSE
	sbp_sleep(KLOGD_PAUSE); /* else messages get lost */
#endif /* KLOGD_PAUSE */ 
	return;
}
/*==========================================================================*/
/*
 * DDI interface: runtime trace bit pattern maintenance
 */
static int sbpcd_dbg_ioctl(unsigned long arg, int level)
{
	switch(arg)
	{
	case 0:	/* OFF */
		sbpcd_debug = DBG_INF;
		break;
		
	default:
		if (arg>=128) sbpcd_debug &= ~(1<<(arg-128));
		else sbpcd_debug |= (1<<arg);
	}
	return (arg);
}
/*==========================================================================*/
static void mark_timeout_delay(u_long i)
{