patch-1.3.36 linux/drivers/cdrom/cdu31a.c
Next file: linux/drivers/cdrom/cm206.c
Previous file: linux/drivers/cdrom/aztcd.c
Back to the patch index
Back to the overall index
- Lines: 3101
- Date:
Sat Oct 21 19:43:31 1995
- Orig file:
v1.3.35/linux/drivers/cdrom/cdu31a.c
- Orig date:
Thu Jan 1 02:00:00 1970
diff -u --recursive --new-file v1.3.35/linux/drivers/cdrom/cdu31a.c linux/drivers/cdrom/cdu31a.c
@@ -0,0 +1,3100 @@
+/*
+ * Sony CDU-31A CDROM interface device driver.
+ *
+ * Corey Minyard (minyard@wf-rch.cirr.com)
+ *
+ * Colossians 3:17
+ *
+ * The Sony interface device driver handles Sony interface CDROM
+ * drives and provides a complete block-level interface as well as an
+ * ioctl() interface compatible with the Sun (as specified in
+ * include/linux/cdrom.h). With this interface, CDROMs can be
+ * accessed and standard audio CDs can be played back normally.
+ *
+ * WARNING - All autoprobes have been removed from the driver.
+ * You MUST configure the CDU31A via a LILO config
+ * at boot time or in lilo.conf. I have the
+ * following in my lilo.conf:
+ *
+ * append="cdu31a=0x1f88,0,PAS"
+ *
+ * The first number is the I/O base address of the
+ * card. The second is the interrupt (0 means none).
+ * The third should be "PAS" if on a Pro-Audio
+ * spectrum, or nothing if on something else.
+ *
+ * This interface is (unfortunately) a polled interface. This is
+ * because most Sony interfaces are set up with DMA and interrupts
+ * disables. Some (like mine) do not even have the capability to
+ * handle interrupts or DMA. For this reason you will see a lot of
+ * the following:
+ *
+ * retry_count = jiffies+ SONY_JIFFIES_TIMEOUT;
+ * while ((retry_count > jiffies) && (! <some condition to wait for))
+ * {
+ * while (handle_sony_cd_attention())
+ * ;
+ *
+ * sony_sleep();
+ * }
+ * if (the condition not met)
+ * {
+ * return an error;
+ * }
+ *
+ * This ugly hack waits for something to happen, sleeping a little
+ * between every try. it also handles attentions, which are
+ * asynchronous events from the drive informing the driver that a disk
+ * has been inserted, removed, etc.
+ *
+ * NEWS FLASH - The driver now supports interrupts but they are
+ * turned off by default. Use of interrupts is highly encouraged, it
+ * cuts CPU usage down to a reasonable level. I had DMA in for a while
+ * but PC DMA is just too slow. Better to just insb() it.
+ *
+ * One thing about these drives: They talk in MSF (Minute Second Frame) format.
+ * There are 75 frames a second, 60 seconds a minute, and up to 75 minutes on a
+ * disk. The funny thing is that these are sent to the drive in BCD, but the
+ * interface wants to see them in decimal. A lot of conversion goes on.
+ *
+ * DRIVER SPECIAL FEATURES
+ * -----------------------
+ *
+ * This section describes features beyond the normal audio and CD-ROM
+ * functions of the drive.
+ *
+ * 2048 byte buffer mode
+ *
+ * If a disk is mounted with -o block=2048, data is copied straight
+ * from the drive data port to the buffer. Otherwise, the readahead
+ * buffer must be involved to hold the other 1K of data when a 1K
+ * block operation is done. Note that with 2048 byte blocks you
+ * cannot execute files from the CD.
+ *
+ * XA compatibility
+ *
+ * The driver should support XA disks for both the CDU31A and CDU33A.
+ * It does this transparently, the using program doesn't need to set it.
+ *
+ * Multi-Session
+ *
+ * A multi-session disk looks just like a normal disk to the user.
+ * Just mount one normally, and all the data should be there.
+ * A special thanks to Koen for help with this!
+ *
+ * Raw sector I/O
+ *
+ * Using the CDROMREADAUDIO it is possible to read raw audio and data
+ * tracks. Both operations return 2352 bytes per sector. On the data
+ * tracks, the first 12 bytes is not returned by the drive and the value
+ * of that data is indeterminate.
+ *
+ *
+ * Copyright (C) 1993 Corey Minyard
+ *
+ * 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.
+ *
+ */
+
+/*
+ *
+ * Setting up the Sony CDU31A/CDU33A drive interface card. If
+ * You have another card, you are on your own.
+ *
+ * +----------+-----------------+----------------------+
+ * | JP1 | 34 Pin Conn | |
+ * | JP2 +-----------------+ |
+ * | JP3 |
+ * | JP4 |
+ * | +--+
+ * | | +-+
+ * | | | | External
+ * | | | | Connector
+ * | | | |
+ * | | +-+
+ * | +--+
+ * | |
+ * | +--------+
+ * | |
+ * +------------------------------------------+
+ *
+ * JP1 sets the Base Address, using the following settings:
+ *
+ * Address Pin 1 Pin 2
+ * ------- ----- -----
+ * 0x320 Short Short
+ * 0x330 Short Open
+ * 0x340 Open Short
+ * 0x360 Open Open
+ *
+ * JP2 and JP3 configure the DMA channel; they must be set the same.
+ *
+ * DMA Pin 1 Pin 2 Pin 3
+ * --- ----- ----- -----
+ * 1 On Off On
+ * 2 Off On Off
+ * 3 Off Off On
+ *
+ * JP4 Configures the IRQ:
+ *
+ * IRQ Pin 1 Pin 2 Pin 3 Pin 4
+ * --- ----- ----- ----- -----
+ * 3 Off Off On Off
+ * 4 Off Off* Off On
+ * 5 On Off Off Off
+ * 6 Off On Off Off
+ *
+ * * The documentation states to set this for interrupt
+ * 4, but I think that is a mistake.
+ */
+
+#include <linux/major.h>
+#include <linux/config.h>
+
+#ifdef MODULE
+# include <linux/module.h>
+# include <linux/version.h>
+char kernel_version[]= UTS_RELEASE;
+#endif
+
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/hdreg.h>
+#include <linux/genhd.h>
+#include <linux/ioport.h>
+#include <linux/string.h>
+#include <linux/malloc.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/segment.h>
+#include <asm/dma.h>
+
+#include <linux/cdrom.h>
+#include <linux/cdu31a.h>
+
+#define MAJOR_NR CDU31A_CDROM_MAJOR
+#include <linux/blk.h>
+
+#define DEBUG 0
+
+#define CDU31A_READAHEAD 128 /* 128 sector, 64kB, 32 reads read-ahead */
+#define CDU31A_MAX_CONSECUTIVE_ATTENTIONS 10
+
+/* Define the following if you have data corruption problems. */
+#undef SONY_POLL_EACH_BYTE
+
+/*
+** Edit the following data to change interrupts, DMA channels, etc.
+** Default is polled and no DMA. DMA is not recommended for double-speed
+** drives.
+*/
+static struct
+{
+ unsigned short base; /* I/O Base Address */
+ short int_num; /* Interrupt Number (-1 means scan for it,
+ 0 means don't use) */
+} cdu31a_addresses[] =
+{
+#if 0 /* No autoconfig any more. See Note at beginning
+ of this file. */
+ { 0x340, 0 }, /* Standard configuration Sony Interface */
+ { 0x1f88, 0 }, /* Fusion CD-16 */
+ { 0x230, 0 }, /* SoundBlaster 16 card */
+ { 0x360, 0 }, /* Secondary standard Sony Interface */
+ { 0x320, 0 }, /* Secondary standard Sony Interface */
+ { 0x330, 0 }, /* Secondary standard Sony Interface */
+ { 0x634, 0 }, /* Sound FX SC400 */
+ { 0x654, 0 }, /* Sound FX SC400 */
+#endif
+ { 0 }
+};
+
+static int handle_sony_cd_attention(void);
+static int read_subcode(void);
+static void sony_get_toc(void);
+static int scd_open(struct inode *inode, struct file *filp);
+static void do_sony_cd_cmd(unsigned char cmd,
+ unsigned char *params,
+ unsigned int num_params,
+ unsigned char *result_buffer,
+ unsigned int *result_size);
+static void size_to_buf(unsigned int size,
+ unsigned char *buf);
+
+/* Parameters for the read-ahead. */
+static unsigned int sony_next_block; /* Next 512 byte block offset */
+static unsigned int sony_blocks_left = 0; /* Number of 512 byte blocks left
+ in the current read command. */
+
+
+/* The base I/O address of the Sony Interface. This is a variable (not a
+ #define) so it can be easily changed via some future ioctl() */
+static unsigned int cdu31a_port = 0;
+
+/*
+ * The following are I/O addresses of the various registers for the drive. The
+ * comment for the base address also applies here.
+ */
+static volatile unsigned short sony_cd_cmd_reg;
+static volatile unsigned short sony_cd_param_reg;
+static volatile unsigned short sony_cd_write_reg;
+static volatile unsigned short sony_cd_control_reg;
+static volatile unsigned short sony_cd_status_reg;
+static volatile unsigned short sony_cd_result_reg;
+static volatile unsigned short sony_cd_read_reg;
+static volatile unsigned short sony_cd_fifost_reg;
+
+
+static int sony_spun_up = 0; /* Has the drive been spun up? */
+
+static int sony_xa_mode = 0; /* Is an XA disk in the drive
+ and the drive a CDU31A? */
+
+static int sony_raw_data_mode = 1; /* 1 if data tracks, 0 if audio.
+ For raw data reads. */
+
+static unsigned int sony_usage = 0; /* How many processes have the
+ drive open. */
+
+static int sony_pas_init = 0; /* Initialize the Pro-Audio
+ Spectrum card? */
+
+static struct s_sony_session_toc sony_toc; /* Holds the
+ table of
+ contents. */
+
+static int sony_toc_read = 0; /* Has the TOC been read for
+ the drive? */
+
+static struct s_sony_subcode last_sony_subcode; /* Points to the last
+ subcode address read */
+
+static volatile int sony_inuse = 0; /* Is the drive in use? Only one operation
+ at a time allowed */
+
+static struct wait_queue * sony_wait = NULL; /* Things waiting for the drive */
+
+static struct task_struct *has_cd_task = NULL; /* The task that is currently
+ using the CDROM drive, or
+ NULL if none. */
+
+static int is_double_speed = 0; /* Is the drive a CDU33A? */
+
+/*
+ * The audio status uses the values from read subchannel data as specified
+ * in include/linux/cdrom.h.
+ */
+static volatile int sony_audio_status = CDROM_AUDIO_NO_STATUS;
+
+/*
+ * The following are a hack for pausing and resuming audio play. The drive
+ * does not work as I would expect it, if you stop it then start it again,
+ * the drive seeks back to the beginning and starts over. This holds the
+ * position during a pause so a resume can restart it. It uses the
+ * audio status variable above to tell if it is paused.
+ */
+static unsigned volatile char cur_pos_msf[3] = { 0, 0, 0 };
+static unsigned volatile char final_pos_msf[3] = { 0, 0, 0 };
+
+/* What IRQ is the drive using? 0 if none. */
+static int cdu31a_irq = 0;
+
+/* The interrupt handler will wake this queue up when it gets an
+ interrupts. */
+static struct wait_queue *cdu31a_irq_wait = NULL;
+
+static int curr_control_reg = 0; /* Current value of the control register */
+
+/* A disk changed variable. When a disk change is detected, it will
+ all be set to TRUE. As the upper layers ask for disk_changed status
+ it will be cleared. */
+static char disk_changed;
+
+/* Variable for using the readahead buffer. The readahead buffer
+ is used for raw sector reads and for blocksizes that are smaller
+ than 2048 bytes. */
+static char readahead_buffer[CD_FRAMESIZE_RAW];
+static int readahead_dataleft = 0;
+static int readahead_bad = 0;
+
+/* Used to time a short period to abort an operation after the
+ drive has been idle for a while. This keeps the light on
+ the drive from flashing for very long. */
+static struct timer_list cdu31a_abort_timer;
+
+/* Marks if the timeout has started an abort read. This is used
+ on entry to the drive to tell the code to read out the status
+ from the abort read. */
+static int abort_read_started = 0;
+
+
+/*
+ * This routine returns 1 if the disk has been changed since the last
+ * check or 0 if it hasn't.
+ */
+static int
+scd_disk_change(kdev_t full_dev)
+{
+ int retval;
+
+ retval = disk_changed;
+ disk_changed = 0;
+
+ return retval;
+}
+
+static inline void
+enable_interrupts(void)
+{
+ curr_control_reg |= ( SONY_ATTN_INT_EN_BIT
+ | SONY_RES_RDY_INT_EN_BIT
+ | SONY_DATA_RDY_INT_EN_BIT);
+ outb(curr_control_reg, sony_cd_control_reg);
+}
+
+static inline void
+disable_interrupts(void)
+{
+ curr_control_reg &= ~( SONY_ATTN_INT_EN_BIT
+ | SONY_RES_RDY_INT_EN_BIT
+ | SONY_DATA_RDY_INT_EN_BIT);
+ outb(curr_control_reg, sony_cd_control_reg);
+}
+
+/*
+ * Wait a little while (used for polling the drive). If in initialization,
+ * setting a timeout doesn't work, so just loop for a while.
+ */
+static inline void
+sony_sleep(void)
+{
+ unsigned long flags;
+
+ if (cdu31a_irq <= 0)
+ {
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies;
+ schedule();
+ }
+ else /* Interrupt driven */
+ {
+ save_flags(flags);
+ cli();
+ enable_interrupts();
+ interruptible_sleep_on(&cdu31a_irq_wait);
+ restore_flags(flags);
+ }
+}
+
+
+/*
+ * The following are convenience routine to read various status and set
+ * various conditions in the drive.
+ */
+static inline int
+is_attention(void)
+{
+ return((inb(sony_cd_status_reg) & SONY_ATTN_BIT) != 0);
+}
+
+static inline int
+is_busy(void)
+{
+ return((inb(sony_cd_status_reg) & SONY_BUSY_BIT) != 0);
+}
+
+static inline int
+is_data_ready(void)
+{
+ return((inb(sony_cd_status_reg) & SONY_DATA_RDY_BIT) != 0);
+}
+
+static inline int
+is_data_requested(void)
+{
+ return((inb(sony_cd_status_reg) & SONY_DATA_REQUEST_BIT) != 0);
+}
+
+static inline int
+is_result_ready(void)
+{
+ return((inb(sony_cd_status_reg) & SONY_RES_RDY_BIT) != 0);
+}
+
+static inline int
+is_param_write_rdy(void)
+{
+ return((inb(sony_cd_fifost_reg) & SONY_PARAM_WRITE_RDY_BIT) != 0);
+}
+
+static inline int
+is_result_reg_not_empty(void)
+{
+ return((inb(sony_cd_fifost_reg) & SONY_RES_REG_NOT_EMP_BIT) != 0);
+}
+
+static inline void
+reset_drive(void)
+{
+ curr_control_reg = 0;
+ outb(SONY_DRIVE_RESET_BIT, sony_cd_control_reg);
+}
+
+static inline void
+clear_attention(void)
+{
+ outb(curr_control_reg | SONY_ATTN_CLR_BIT, sony_cd_control_reg);
+}
+
+static inline void
+clear_result_ready(void)
+{
+ outb(curr_control_reg | SONY_RES_RDY_CLR_BIT, sony_cd_control_reg);
+}
+
+static inline void
+clear_data_ready(void)
+{
+ outb(curr_control_reg | SONY_DATA_RDY_CLR_BIT, sony_cd_control_reg);
+}
+
+static inline void
+clear_param_reg(void)
+{
+ outb(curr_control_reg | SONY_PARAM_CLR_BIT, sony_cd_control_reg);
+}
+
+static inline unsigned char
+read_status_register(void)
+{
+ return(inb(sony_cd_status_reg));
+}
+
+static inline unsigned char
+read_result_register(void)
+{
+ return(inb(sony_cd_result_reg));
+}
+
+static inline unsigned char
+read_data_register(void)
+{
+ return(inb(sony_cd_read_reg));
+}
+
+static inline void
+write_param(unsigned char param)
+{
+ outb(param, sony_cd_param_reg);
+}
+
+static inline void
+write_cmd(unsigned char cmd)
+{
+ outb(curr_control_reg | SONY_RES_RDY_INT_EN_BIT, sony_cd_control_reg);
+ outb(cmd, sony_cd_cmd_reg);
+}
+
+static void
+cdu31a_interrupt(int irq, struct pt_regs *regs)
+{
+ unsigned char val;
+
+ if (abort_read_started)
+ {
+ /* We might be waiting for an abort to finish. Don't
+ disable interrupts yet, though, because we handle
+ this one here. */
+ /* Clear out the result registers. */
+ while (is_result_reg_not_empty())
+ {
+ val = read_result_register();
+ }
+ clear_data_ready();
+ clear_result_ready();
+
+ /* Clear out the data */
+ while (is_data_requested())
+ {
+ val = read_data_register();
+ }
+ abort_read_started = 0;
+
+ /* If something was waiting, wake it up now. */
+ if (cdu31a_irq_wait != NULL)
+ {
+ disable_interrupts();
+ wake_up(&cdu31a_irq_wait);
+ }
+ }
+ else if (cdu31a_irq_wait != NULL)
+ {
+ disable_interrupts();
+ wake_up(&cdu31a_irq_wait);
+ }
+ else
+ {
+ disable_interrupts();
+ printk("CDU31A: Got an interrupt but nothing was waiting\n");
+ }
+}
+
+/*
+ * Set the drive parameters so the drive will auto-spin-up when a
+ * disk is inserted.
+ */
+static void
+set_drive_params(void)
+{
+ unsigned char res_reg[12];
+ unsigned int res_size;
+ unsigned char params[3];
+
+
+ params[0] = SONY_SD_AUTO_SPIN_DOWN_TIME;
+ params[1] = 0x00; /* Never spin down the drive. */
+ do_sony_cd_cmd(SONY_SET_DRIVE_PARAM_CMD,
+ params,
+ 2,
+ res_reg,
+ &res_size);
+ if ((res_size < 2) || ((res_reg[0] & 0xf0) == 0x20))
+ {
+ printk(" Unable to set spin-down time: 0x%2.2x\n", res_reg[1]);
+ }
+
+ params[0] = SONY_SD_MECH_CONTROL;
+ params[1] = 0x03; /* Set auto spin up and auto eject */
+ if (is_double_speed)
+ {
+ params[1] |= 0x04; /* Set the drive to double speed if possible */
+ }
+ do_sony_cd_cmd(SONY_SET_DRIVE_PARAM_CMD,
+ params,
+ 2,
+ res_reg,
+ &res_size);
+ if ((res_size < 2) || ((res_reg[0] & 0xf0) == 0x20))
+ {
+ printk(" Unable to set mechanical parameters: 0x%2.2x\n", res_reg[1]);
+ }
+}
+
+/*
+ * This code will reset the drive and attempt to restore sane parameters.
+ */
+static void
+restart_on_error(void)
+{
+ unsigned char res_reg[12];
+ unsigned int res_size;
+ unsigned int retry_count;
+
+
+ printk("cdu31a: Resetting drive on error\n");
+ reset_drive();
+ retry_count = jiffies + SONY_RESET_TIMEOUT;
+ while ((retry_count > jiffies) && (!is_attention()))
+ {
+ sony_sleep();
+ }
+ set_drive_params();
+ do_sony_cd_cmd(SONY_SPIN_UP_CMD, NULL, 0, res_reg, &res_size);
+ if ((res_size < 2) || ((res_reg[0] & 0xf0) == 0x20))
+ {
+ printk("cdu31a: Unable to spin up drive: 0x%2.2x\n", res_reg[1]);
+ }
+
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + 2*HZ;
+ schedule();
+
+ do_sony_cd_cmd(SONY_READ_TOC_CMD, NULL, 0, res_reg, &res_size);
+ if ((res_size < 2) || ((res_reg[0] & 0xf0) == 0x20))
+ {
+ printk("cdu31a: Unable to read TOC: 0x%2.2x\n", res_reg[1]);
+ }
+}
+
+/*
+ * This routine writes data to the parameter register. Since this should
+ * happen fairly fast, it is polled with no OS waits between.
+ */
+static int
+write_params(unsigned char *params,
+ int num_params)
+{
+ unsigned int retry_count;
+
+
+ retry_count = SONY_READY_RETRIES;
+ while ((retry_count > 0) && (!is_param_write_rdy()))
+ {
+ retry_count--;
+ }
+ if (!is_param_write_rdy())
+ {
+ return -EIO;
+ }
+
+ while (num_params > 0)
+ {
+ write_param(*params);
+ params++;
+ num_params--;
+ }
+
+ return 0;
+}
+
+
+/*
+ * The following reads data from the command result register. It is a
+ * fairly complex routine, all status info flows back through this
+ * interface. The algorithm is stolen directly from the flowcharts in
+ * the drive manual.
+ */
+static void
+get_result(unsigned char *result_buffer,
+ unsigned int *result_size)
+{
+ unsigned char a, b;
+ int i;
+ unsigned int retry_count;
+
+
+ while (handle_sony_cd_attention())
+ ;
+ /* Wait for the result data to be ready */
+ retry_count = jiffies + SONY_JIFFIES_TIMEOUT;
+ while ((retry_count > jiffies) && (is_busy() || (!(is_result_ready()))))
+ {
+ sony_sleep();
+
+ while (handle_sony_cd_attention())
+ ;
+ }
+ if (is_busy() || (!(is_result_ready())))
+ {
+#if DEBUG
+ printk("CDU31A timeout out %d\n", __LINE__);
+#endif
+ result_buffer[0] = 0x20;
+ result_buffer[1] = SONY_TIMEOUT_OP_ERR;
+ *result_size = 2;
+ return;
+ }
+
+ /*
+ * Get the first two bytes. This determines what else needs
+ * to be done.
+ */
+ clear_result_ready();
+ a = read_result_register();
+ *result_buffer = a;
+ result_buffer++;
+
+ /* Check for block error status result. */
+ if ((a & 0xf0) == 0x50)
+ {
+ *result_size = 1;
+ return;
+ }
+
+ b = read_result_register();
+ *result_buffer = b;
+ result_buffer++;
+ *result_size = 2;
+
+ /*
+ * 0x20 means an error occurred. Byte 2 will have the error code.
+ * Otherwise, the command succeeded, byte 2 will have the count of
+ * how many more status bytes are coming.
+ *
+ * The result register can be read 10 bytes at a time, a wait for
+ * result ready to be asserted must be done between every 10 bytes.
+ */
+ if ((a & 0xf0) != 0x20)
+ {
+ if (b > 8)
+ {
+ for (i=0; i<8; i++)
+ {
+ *result_buffer = read_result_register();
+ result_buffer++;
+ (*result_size)++;
+ }
+ b = b - 8;
+
+ while (b > 10)
+ {
+ retry_count = SONY_READY_RETRIES;
+ while ((retry_count > 0) && (!is_result_ready()))
+ {
+ retry_count--;
+ }
+ if (!is_result_ready())
+ {
+#if DEBUG
+ printk("CDU31A timeout out %d\n", __LINE__);
+#endif
+ result_buffer[0] = 0x20;
+ result_buffer[1] = SONY_TIMEOUT_OP_ERR;
+ *result_size = 2;
+ return;
+ }
+
+ clear_result_ready();
+
+ for (i=0; i<10; i++)
+ {
+ *result_buffer = read_result_register();
+ result_buffer++;
+ (*result_size)++;
+ }
+ b = b - 10;
+ }
+
+ if (b > 0)
+ {
+ retry_count = SONY_READY_RETRIES;
+ while ((retry_count > 0) && (!is_result_ready()))
+ {
+ retry_count--;
+ }
+ if (!is_result_ready())
+ {
+#if DEBUG
+ printk("CDU31A timeout out %d\n", __LINE__);
+#endif
+ result_buffer[0] = 0x20;
+ result_buffer[1] = SONY_TIMEOUT_OP_ERR;
+ *result_size = 2;
+ return;
+ }
+ }
+ }
+
+ while (b > 0)
+ {
+ *result_buffer = read_result_register();
+ result_buffer++;
+ (*result_size)++;
+ b--;
+ }
+ }
+}
+
+/*
+ * Do a command that does not involve data transfer. This routine must
+ * be re-entrant from the same task to support being called from the
+ * data operation code when an error occurs.
+ */
+static void
+do_sony_cd_cmd(unsigned char cmd,
+ unsigned char *params,
+ unsigned int num_params,
+ unsigned char *result_buffer,
+ unsigned int *result_size)
+{
+ unsigned int retry_count;
+ int num_retries;
+ int recursive_call;
+ unsigned long flags;
+
+
+ save_flags(flags);
+ cli();
+ if (current != has_cd_task) /* Allow recursive calls to this routine */
+ {
+ while (sony_inuse)
+ {
+ interruptible_sleep_on(&sony_wait);
+ if (current->signal & ~current->blocked)
+ {
+ result_buffer[0] = 0x20;
+ result_buffer[1] = SONY_SIGNAL_OP_ERR;
+ *result_size = 2;
+ restore_flags(flags);
+ return;
+ }
+ }
+ sony_inuse = 1;
+ has_cd_task = current;
+ recursive_call = 0;
+ }
+ else
+ {
+ recursive_call = 1;
+ }
+
+ num_retries = 0;
+retry_cd_operation:
+
+ while (handle_sony_cd_attention())
+ ;
+
+ sti();
+
+ retry_count = jiffies + SONY_JIFFIES_TIMEOUT;
+ while ((retry_count > jiffies) && (is_busy()))
+ {
+ sony_sleep();
+
+ while (handle_sony_cd_attention())
+ ;
+ }
+ if (is_busy())
+ {
+#if DEBUG
+ printk("CDU31A timeout out %d\n", __LINE__);
+#endif
+ result_buffer[0] = 0x20;
+ result_buffer[1] = SONY_TIMEOUT_OP_ERR;
+ *result_size = 2;
+ }
+ else
+ {
+ clear_result_ready();
+ clear_param_reg();
+
+ write_params(params, num_params);
+ write_cmd(cmd);
+
+ get_result(result_buffer, result_size);
+ }
+
+ if ( ((result_buffer[0] & 0xf0) == 0x20)
+ && (num_retries < MAX_CDU31A_RETRIES))
+ {
+ num_retries++;
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + HZ/10; /* Wait .1 seconds on retries */
+ schedule();
+ goto retry_cd_operation;
+ }
+
+ if (!recursive_call)
+ {
+ has_cd_task = NULL;
+ sony_inuse = 0;
+ wake_up_interruptible(&sony_wait);
+ }
+
+ restore_flags(flags);
+}
+
+
+/*
+ * Handle an attention from the drive. This will return 1 if it found one
+ * or 0 if not (if one is found, the caller might want to call again).
+ *
+ * This routine counts the number of consecutive times it is called
+ * (since this is always called from a while loop until it returns
+ * a 0), and returns a 0 if it happens too many times. This will help
+ * prevent a lockup.
+ */
+static int
+handle_sony_cd_attention(void)
+{
+ unsigned char atten_code;
+ static int num_consecutive_attentions = 0;
+ volatile int val;
+
+
+ if (abort_read_started)
+ {
+ while (is_result_reg_not_empty())
+ {
+ val = read_result_register();
+ }
+ clear_data_ready();
+ clear_result_ready();
+ /* Clear out the data */
+ while (is_data_requested())
+ {
+ val = read_data_register();
+ }
+ abort_read_started = 0;
+ return(1);
+ }
+ else if (is_attention())
+ {
+ if (num_consecutive_attentions > CDU31A_MAX_CONSECUTIVE_ATTENTIONS)
+ {
+ printk("cdu31a: Too many consecutive attentions: %d\n",
+ num_consecutive_attentions);
+ num_consecutive_attentions = 0;
+ return(0);
+ }
+
+ clear_attention();
+ atten_code = read_result_register();
+
+ switch (atten_code)
+ {
+ /* Someone changed the CD. Mark it as changed */
+ case SONY_MECH_LOADED_ATTN:
+ disk_changed = 1;
+ sony_toc_read = 0;
+ sony_audio_status = CDROM_AUDIO_NO_STATUS;
+ sony_blocks_left = 0;
+ break;
+
+ case SONY_SPIN_DOWN_COMPLETE_ATTN:
+ /* Mark the disk as spun down. */
+ sony_spun_up = 0;
+ break;
+
+ case SONY_AUDIO_PLAY_DONE_ATTN:
+ sony_audio_status = CDROM_AUDIO_COMPLETED;
+ read_subcode();
+ break;
+
+ case SONY_EJECT_PUSHED_ATTN:
+ sony_audio_status = CDROM_AUDIO_INVALID;
+ break;
+
+ case SONY_LEAD_IN_ERR_ATTN:
+ case SONY_LEAD_OUT_ERR_ATTN:
+ case SONY_DATA_TRACK_ERR_ATTN:
+ case SONY_AUDIO_PLAYBACK_ERR_ATTN:
+ sony_audio_status = CDROM_AUDIO_ERROR;
+ break;
+ }
+
+ num_consecutive_attentions++;
+ return(1);
+ }
+
+ num_consecutive_attentions = 0;
+ return(0);
+}
+
+
+/* Convert from an integer 0-99 to BCD */
+static inline unsigned int
+int_to_bcd(unsigned int val)
+{
+ int retval;
+
+
+ retval = (val / 10) << 4;
+ retval = retval | val % 10;
+ return(retval);
+}
+
+
+/* Convert from BCD to an integer from 0-99 */
+static unsigned int
+bcd_to_int(unsigned int bcd)
+{
+ return((((bcd >> 4) & 0x0f) * 10) + (bcd & 0x0f));
+}
+
+
+/*
+ * Convert a logical sector value (like the OS would want to use for
+ * a block device) to an MSF format.
+ */
+static void
+log_to_msf(unsigned int log, unsigned char *msf)
+{
+ log = log + LOG_START_OFFSET;
+ msf[0] = int_to_bcd(log / 4500);
+ log = log % 4500;
+ msf[1] = int_to_bcd(log / 75);
+ msf[2] = int_to_bcd(log % 75);
+}
+
+
+/*
+ * Convert an MSF format to a logical sector.
+ */
+static unsigned int
+msf_to_log(unsigned char *msf)
+{
+ unsigned int log;
+
+
+ log = bcd_to_int(msf[2]);
+ log += bcd_to_int(msf[1]) * 75;
+ log += bcd_to_int(msf[0]) * 4500;
+ log = log - LOG_START_OFFSET;
+
+ return log;
+}
+
+
+/*
+ * Take in integer size value and put it into a buffer like
+ * the drive would want to see a number-of-sector value.
+ */
+static void
+size_to_buf(unsigned int size,
+ unsigned char *buf)
+{
+ buf[0] = size / 65536;
+ size = size % 65536;
+ buf[1] = size / 256;
+ buf[2] = size % 256;
+}
+
+/* Starts a read operation. Returns 0 on success and 1 on failure.
+ The read operation used here allows multiple sequential sectors
+ to be read and status returned for each sector. The driver will
+ read the out one at a time as the requests come and abort the
+ operation if the requested sector is not the next one from the
+ drive. */
+static int
+start_request(unsigned int sector,
+ unsigned int nsect,
+ int read_nsect_only)
+{
+ unsigned char params[6];
+ unsigned int read_size;
+ unsigned int retry_count;
+
+
+ log_to_msf(sector, params);
+ /* If requested, read exactly what was asked. */
+ if (read_nsect_only)
+ {
+ read_size = nsect;
+ }
+ /*
+ * If the full read-ahead would go beyond the end of the media, trim
+ * it back to read just till the end of the media.
+ */
+ else if ((sector + nsect) >= sony_toc.lead_out_start_lba)
+ {
+ read_size = sony_toc.lead_out_start_lba - sector;
+ }
+ /* Read the full readahead amount. */
+ else
+ {
+ read_size = CDU31A_READAHEAD;
+ }
+ size_to_buf(read_size, ¶ms[3]);
+
+ /*
+ * Clear any outstanding attentions and wait for the drive to
+ * complete any pending operations.
+ */
+ while (handle_sony_cd_attention())
+ ;
+
+ retry_count = jiffies + SONY_JIFFIES_TIMEOUT;
+ while ((retry_count > jiffies) && (is_busy()))
+ {
+ sony_sleep();
+
+ while (handle_sony_cd_attention())
+ ;
+ }
+
+ if (is_busy())
+ {
+ printk("CDU31A: Timeout while waiting to issue command\n");
+ return(1);
+ }
+ else
+ {
+ /* Issue the command */
+ clear_result_ready();
+ clear_param_reg();
+
+ write_params(params, 6);
+ write_cmd(SONY_READ_BLKERR_STAT_CMD);
+
+ sony_blocks_left = read_size * 4;
+ sony_next_block = sector * 4;
+ readahead_dataleft = 0;
+ readahead_bad = 0;
+ return(0);
+ }
+}
+
+/* Abort a pending read operation. Clear all the drive status and
+ readahead variables. */
+static void
+abort_read(void)
+{
+ unsigned char result_reg[2];
+ int result_size;
+ volatile int val;
+
+
+ do_sony_cd_cmd(SONY_ABORT_CMD, NULL, 0, result_reg, &result_size);
+ if ((result_reg[0] & 0xf0) == 0x20)
+ {
+ printk("CDU31A: Error aborting read, error = 0x%2.2x\n",
+ result_reg[1]);
+ }
+
+ while (is_result_reg_not_empty())
+ {
+ val = read_result_register();
+ }
+ clear_data_ready();
+ clear_result_ready();
+ /* Clear out the data */
+ while (is_data_requested())
+ {
+ val = read_data_register();
+ }
+
+ sony_blocks_left = 0;
+ readahead_dataleft = 0;
+ readahead_bad = 0;
+}
+
+/* Called when the timer times out. This will abort the
+ pending read operation. */
+static void
+handle_abort_timeout(unsigned long data)
+{
+ /* If it is in use, ignore it. */
+ if (!sony_inuse)
+ {
+ /* We can't use abort_read(), because it will sleep
+ or schedule in the timer interrupt. Just start
+ the operation, finish it on the next access to
+ the drive. */
+ clear_result_ready();
+ clear_param_reg();
+ write_cmd(SONY_ABORT_CMD);
+
+ sony_blocks_left = 0;
+ readahead_dataleft = 0;
+ readahead_bad = 0;
+ abort_read_started = 1;
+ }
+}
+
+/* Actually get data and status from the drive. */
+static void
+input_data(char *buffer,
+ unsigned int bytesleft,
+ unsigned int nblocks,
+ unsigned int offset,
+ unsigned int skip)
+{
+ int i;
+ volatile unsigned char val;
+
+
+ /* If an XA disk on a CDU31A, skip the first 12 bytes of data from
+ the disk. The real data is after that. */
+ if (sony_xa_mode)
+ {
+ for(i=0; i<CD_XA_HEAD; i++)
+ {
+ val = read_data_register();
+ }
+ }
+
+ clear_data_ready();
+
+ if (bytesleft == 2048) /* 2048 byte direct buffer transfer */
+ {
+ insb(sony_cd_read_reg, buffer, 2048);
+ readahead_dataleft = 0;
+ }
+ else
+ {
+ /* If the input read did not align with the beginning of the block,
+ skip the necessary bytes. */
+ if (skip != 0)
+ {
+ insb(sony_cd_read_reg, readahead_buffer, skip);
+ }
+
+ /* Get the data into the buffer. */
+ insb(sony_cd_read_reg, &buffer[offset], bytesleft);
+
+ /* Get the rest of the data into the readahead buffer at the
+ proper location. */
+ readahead_dataleft = (2048 - skip) - bytesleft;
+ insb(sony_cd_read_reg,
+ readahead_buffer + bytesleft,
+ readahead_dataleft);
+ }
+ sony_blocks_left -= nblocks;
+ sony_next_block += nblocks;
+
+ /* If an XA disk, we have to clear out the rest of the unused
+ error correction data. */
+ if (sony_xa_mode)
+ {
+ for(i=0; i<CD_XA_TAIL; i++)
+ {
+ val = read_data_register();
+ }
+ }
+}
+
+/* read data from the drive. Note the nsect must be <= 4. */
+static void
+read_data_block(char *buffer,
+ unsigned int block,
+ unsigned int nblocks,
+ unsigned char res_reg[],
+ int *res_size)
+{
+ unsigned int retry_count;
+ unsigned int bytesleft;
+ unsigned int offset;
+ unsigned int skip;
+
+
+ res_reg[0] = 0;
+ res_reg[1] = 0;
+ *res_size = 0;
+ bytesleft = nblocks * 512;
+ offset = 0;
+
+ /* If the data in the read-ahead does not match the block offset,
+ then fix things up. */
+ if (((block % 4) * 512) != ((2048 - readahead_dataleft) % 2048))
+ {
+ sony_next_block += block % 4;
+ sony_blocks_left -= block % 4;
+ skip = (block % 4) * 512;
+ }
+ else
+ {
+ skip = 0;
+ }
+
+ /* We have readahead data in the buffer, get that first before we
+ decide if a read is necessary. */
+ if (readahead_dataleft != 0)
+ {
+ if (bytesleft > readahead_dataleft)
+ {
+ /* The readahead will not fill the requested buffer, but
+ get the data out of the readahead into the buffer. */
+ memcpy(buffer,
+ readahead_buffer + (2048 - readahead_dataleft),
+ readahead_dataleft);
+ readahead_dataleft = 0;
+ bytesleft -= readahead_dataleft;
+ offset += readahead_dataleft;
+ }
+ else
+ {
+ /* The readahead will fill the whole buffer, get the data
+ and return. */
+ memcpy(buffer,
+ readahead_buffer + (2048 - readahead_dataleft),
+ bytesleft);
+ readahead_dataleft -= bytesleft;
+ bytesleft = 0;
+ sony_blocks_left -= nblocks;
+ sony_next_block += nblocks;
+
+ /* If the data in the readahead is bad, return an error so the
+ driver will abort the buffer. */
+ if (readahead_bad)
+ {
+ res_reg[0] = 0x20;
+ res_reg[1] = SONY_BAD_DATA_ERR;
+ *res_size = 2;
+ }
+
+ if (readahead_dataleft == 0)
+ {
+ readahead_bad = 0;
+ }
+
+ /* Final transfer is done for read command, get final result. */
+ if (sony_blocks_left == 0)
+ {
+ get_result(res_reg, res_size);
+ }
+ return;
+ }
+ }
+
+ /* Wait for the drive to tell us we have something */
+ retry_count = jiffies + SONY_JIFFIES_TIMEOUT;
+ while ((retry_count > jiffies) && !(is_data_ready()))
+ {
+ while (handle_sony_cd_attention())
+ ;
+
+ sony_sleep();
+ }
+ if (!(is_data_ready()))
+ {
+ if (is_result_ready())
+ {
+ get_result(res_reg, res_size);
+ if ((res_reg[0] & 0xf0) != 0x20)
+ {
+ printk("CDU31A: Got result that should have been error: %d\n",
+ res_reg[0]);
+ res_reg[0] = 0x20;
+ res_reg[1] = SONY_BAD_DATA_ERR;
+ *res_size = 2;
+ }
+ abort_read();
+ }
+ else
+ {
+#if DEBUG
+ printk("CDU31A timeout out %d\n", __LINE__);
+#endif
+ res_reg[0] = 0x20;
+ res_reg[1] = SONY_TIMEOUT_OP_ERR;
+ *res_size = 2;
+ abort_read();
+ }
+ }
+ else
+ {
+ input_data(buffer, bytesleft, nblocks, offset, skip);
+
+ /* Wait for the status from the drive. */
+ retry_count = jiffies + SONY_JIFFIES_TIMEOUT;
+ while ((retry_count > jiffies) && !(is_result_ready()))
+ {
+ while (handle_sony_cd_attention())
+ ;
+
+ sony_sleep();
+ }
+
+ if (!is_result_ready())
+ {
+#if DEBUG
+ printk("CDU31A timeout out %d\n", __LINE__);
+#endif
+ res_reg[0] = 0x20;
+ res_reg[1] = SONY_TIMEOUT_OP_ERR;
+ *res_size = 2;
+ abort_read();
+ }
+ else
+ {
+ get_result(res_reg, res_size);
+
+ /* If we got a buffer status, handle that. */
+ if ((res_reg[0] & 0xf0) == 0x50)
+ {
+
+ if ( (res_reg[0] == SONY_NO_CIRC_ERR_BLK_STAT)
+ || (res_reg[0] == SONY_NO_LECC_ERR_BLK_STAT)
+ || (res_reg[0] == SONY_RECOV_LECC_ERR_BLK_STAT))
+ {
+ /* The data was successful, but if data was read from
+ the readahead and it was bad, set the whole
+ buffer as bad. */
+ if (readahead_bad)
+ {
+ readahead_bad = 0;
+ res_reg[0] = 0x20;
+ res_reg[1] = SONY_BAD_DATA_ERR;
+ *res_size = 2;
+ }
+ }
+ else
+ {
+ printk("CDU31A: Data block error: 0x%x\n", res_reg[0]);
+ res_reg[0] = 0x20;
+ res_reg[1] = SONY_BAD_DATA_ERR;
+ *res_size = 2;
+
+ /* Data is in the readahead buffer but an error was returned.
+ Make sure future requests don't use the data. */
+ if (bytesleft != 2048)
+ {
+ readahead_bad = 1;
+ }
+ }
+
+ /* Final transfer is done for read command, get final result. */
+ if (sony_blocks_left == 0)
+ {
+ get_result(res_reg, res_size);
+ }
+ }
+ else if ((res_reg[0] & 0xf0) != 0x20)
+ {
+ /* The drive gave me bad status, I don't know what to do.
+ Reset the driver and return an error. */
+ printk("CDU31A: Invalid block status: 0x%x\n", res_reg[0]);
+ restart_on_error();
+ res_reg[0] = 0x20;
+ res_reg[1] = SONY_BAD_DATA_ERR;
+ *res_size = 2;
+ }
+ }
+ }
+}
+
+/*
+ * The OS calls this to perform a read or write operation to the drive.
+ * Write obviously fail. Reads to a read ahead of sony_buffer_size
+ * bytes to help speed operations. This especially helps since the OS
+ * uses 1024 byte blocks and the drive uses 2048 byte blocks. Since most
+ * data access on a CD is done sequentially, this saves a lot of operations.
+ */
+static void
+do_cdu31a_request(void)
+{
+ int block;
+ int nblock;
+ unsigned char res_reg[12];
+ unsigned int res_size;
+ int num_retries;
+ unsigned long flags;
+
+
+ /*
+ * Make sure no one else is using the driver; wait for them
+ * to finish if it is so.
+ */
+ save_flags(flags);
+ cli();
+ while (sony_inuse)
+ {
+ interruptible_sleep_on(&sony_wait);
+ if (current->signal & ~current->blocked)
+ {
+ restore_flags(flags);
+ if (CURRENT && CURRENT->rq_status != RQ_INACTIVE)
+ {
+ end_request(0);
+ }
+ restore_flags(flags);
+ return;
+ }
+ }
+ sony_inuse = 1;
+ has_cd_task = current;
+
+ /* Get drive status before doing anything. */
+ while (handle_sony_cd_attention())
+ ;
+
+ sti();
+
+ /* If the timer is running, cancel it. */
+ if (cdu31a_abort_timer.next != NULL)
+ {
+ del_timer(&cdu31a_abort_timer);
+ }
+
+ while (1)
+ {
+cdu31a_request_startover:
+ /*
+ * The beginning here is stolen from the hard disk driver. I hope
+ * it's right.
+ */
+ if (!(CURRENT) || CURRENT->rq_status == RQ_INACTIVE)
+ {
+ goto end_do_cdu31a_request;
+ }
+
+ if (!sony_spun_up)
+ {
+ struct inode in;
+
+ /* This is a kludge to get a valid dev in an inode that
+ scd_open can take. That's the only thing scd_open()
+ uses the inode for. */
+ in.i_rdev = CURRENT->rq_dev;
+ scd_open(&in,NULL);
+ }
+
+ /* I don't use INIT_REQUEST because it calls return, which would
+ return without unlocking the device. It shouldn't matter,
+ but just to be safe... */
+ if (MAJOR(CURRENT->rq_dev) != MAJOR_NR)
+ {
+ panic(DEVICE_NAME ": request list destroyed");
+ }
+ if (CURRENT->bh)
+ {
+ if (!CURRENT->bh->b_lock)
+ {
+ panic(DEVICE_NAME ": block not locked");
+ }
+ }
+
+ block = CURRENT->sector;
+ nblock = CURRENT->nr_sectors;
+
+ if (!sony_toc_read)
+ {
+ printk("CDU31A: TOC not read\n");
+ end_request(0);
+ goto cdu31a_request_startover;
+ }
+
+ /* Check for base read of multi-session disk. This will still work
+ for single session disks, so just do it. Blocks less than 80
+ are for the volume info, so offset them by the start track (which
+ should be zero for a single-session disk). */
+ if (block < 80)
+ {
+ /* Offset the request into the session. */
+ block += (sony_toc.start_track_lba * 4);
+ }
+
+ switch(CURRENT->cmd)
+ {
+ case READ:
+ /*
+ * If the block address is invalid or the request goes beyond the end of
+ * the media, return an error.
+ */
+#if 0
+ if ((block / 4) < sony_toc.start_track_lba)
+ {
+ printk("CDU31A: Request before beginning of media\n");
+ end_request(0);
+ goto cdu31a_request_startover;
+ }
+#endif
+ if ((block / 4) >= sony_toc.lead_out_start_lba)
+ {
+ printk("CDU31A: Request past end of media\n");
+ end_request(0);
+ goto cdu31a_request_startover;
+ }
+ if (((block + nblock) / 4) >= sony_toc.lead_out_start_lba)
+ {
+ printk("CDU31A: Request past end of media\n");
+ end_request(0);
+ goto cdu31a_request_startover;
+ }
+
+ num_retries = 0;
+
+try_read_again:
+ while (handle_sony_cd_attention())
+ ;
+
+ if (!sony_toc_read)
+ {
+ printk("CDU31A: TOC not read\n");
+ end_request(0);
+ goto cdu31a_request_startover;
+ }
+
+ /* If no data is left to be read from the drive, start the
+ next request. */
+ if (sony_blocks_left == 0)
+ {
+ if (start_request(block / 4, CDU31A_READAHEAD / 4, 0))
+ {
+ end_request(0);
+ goto cdu31a_request_startover;
+ }
+ }
+ /* If the requested block is not the next one waiting in
+ the driver, abort the current operation and start a
+ new one. */
+ else if (block != sony_next_block)
+ {
+#if DEBUG
+ printk("CDU31A Warning: Read for block %d, expected %d\n",
+ block,
+ sony_next_block);
+#endif
+ abort_read();
+ if (!sony_toc_read)
+ {
+ printk("CDU31A: TOC not read\n");
+ end_request(0);
+ goto cdu31a_request_startover;
+ }
+ if (start_request(block / 4, CDU31A_READAHEAD / 4, 0))
+ {
+ printk("CDU31a: start request failed\n");
+ end_request(0);
+ goto cdu31a_request_startover;
+ }
+ }
+
+ read_data_block(CURRENT->buffer, block, nblock, res_reg, &res_size);
+ if (res_reg[0] == 0x20)
+ {
+ if (num_retries > MAX_CDU31A_RETRIES)
+ {
+ end_request(0);
+ goto cdu31a_request_startover;
+ }
+
+ num_retries++;
+ if (res_reg[1] == SONY_NOT_SPIN_ERR)
+ {
+ do_sony_cd_cmd(SONY_SPIN_UP_CMD, NULL, 0, res_reg, &res_size);
+ }
+ else
+ {
+ printk("CDU31A: Read error: 0x%2.2x\n", res_reg[1]);
+ }
+ goto try_read_again;
+ }
+ else
+ {
+ end_request(1);
+ }
+ break;
+
+ case WRITE:
+ end_request(0);
+ break;
+
+ default:
+ panic("CDU31A: Unknown cmd");
+ }
+ }
+
+end_do_cdu31a_request:
+#if 0
+ /* After finished, cancel any pending operations. */
+ abort_read();
+#else
+ /* Start a timer to time out after a while to disable
+ the read. */
+ cdu31a_abort_timer.expires = jiffies + 2*HZ; /* Wait 2 seconds */
+ add_timer(&cdu31a_abort_timer);
+#endif
+
+ has_cd_task = NULL;
+ sony_inuse = 0;
+ wake_up_interruptible(&sony_wait);
+ restore_flags(flags);
+}
+
+/* Copy overlapping buffers. */
+static void
+mcovlp(char *dst,
+ char *src,
+ int size)
+{
+ src += (size - 1);
+ dst += (size - 1);
+ while (size > 0)
+ {
+ *dst = *src;
+ size--;
+ dst--;
+ src--;
+ }
+}
+
+
+/*
+ * Read the table of contents from the drive and set up TOC if
+ * successful.
+ */
+static void
+sony_get_toc(void)
+{
+ unsigned char res_reg[2];
+ unsigned int res_size;
+ unsigned char parms[1];
+ int session;
+
+
+#if DEBUG
+ printk("Entering sony_get_toc\n");
+#endif
+
+ if (!sony_toc_read)
+ {
+ /* The idea here is we keep asking for sessions until the command
+ fails. Then we know what the last valid session on the disk is.
+ No need to check session 0, since session 0 is the same as session
+ 1; the command returns different information if you give it 0.
+ Don't check session 1 because that is the first session, it must
+ be there. */
+ session = 2;
+ while (1)
+ {
+#if DEBUG
+ printk("Trying session %d\n", session);
+#endif
+ parms[0] = session;
+ do_sony_cd_cmd(SONY_READ_TOC_SPEC_CMD,
+ parms,
+ 1,
+ res_reg,
+ &res_size);
+
+#if DEBUG
+ printk("%2.2x %2.2x\n", res_reg[0], res_reg[1]);
+#endif
+
+ if ((res_size < 2) || ((res_reg[0] & 0xf0) == 0x20))
+ {
+ /* An error reading the TOC, this must be past the last session. */
+ break;
+ }
+
+ session++;
+
+ /* Let's not get carried away... */
+ if (session > 20)
+ {
+ return;
+ }
+ }
+
+ session--;
+
+#if DEBUG
+ printk("Reading session %d\n", session);
+#endif
+
+ parms[0] = session;
+ do_sony_cd_cmd(SONY_REQ_TOC_DATA_SPEC_CMD,
+ parms,
+ 1,
+ (unsigned char *) &sony_toc,
+ &res_size);
+ if ((res_size < 2) || ((sony_toc.exec_status[0] & 0xf0) == 0x20))
+ {
+ /* An error reading the TOC. Return without sony_toc_read
+ set. */
+ return;
+ }
+
+ sony_toc_read = 1;
+
+ /* For points that do not exist, move the data over them
+ to the right location. */
+ if (sony_toc.pointb0 != 0xb0)
+ {
+ mcovlp(((char *) &sony_toc) + 27,
+ ((char *) &sony_toc) + 18,
+ res_size - 18);
+ res_size += 9;
+ }
+ if (sony_toc.pointb1 != 0xb1)
+ {
+ mcovlp(((char *) &sony_toc) + 36,
+ ((char *) &sony_toc) + 27,
+ res_size - 27);
+ res_size += 9;
+ }
+ if (sony_toc.pointb2 != 0xb2)
+ {
+ mcovlp(((char *) &sony_toc) + 45,
+ ((char *) &sony_toc) + 36,
+ res_size - 36);
+ res_size += 9;
+ }
+ if (sony_toc.pointb3 != 0xb3)
+ {
+ mcovlp(((char *) &sony_toc) + 54,
+ ((char *) &sony_toc) + 45,
+ res_size - 45);
+ res_size += 9;
+ }
+ if (sony_toc.pointb4 != 0xb4)
+ {
+ mcovlp(((char *) &sony_toc) + 63,
+ ((char *) &sony_toc) + 54,
+ res_size - 54);
+ res_size += 9;
+ }
+ if (sony_toc.pointc0 != 0xc0)
+ {
+ mcovlp(((char *) &sony_toc) + 72,
+ ((char *) &sony_toc) + 63,
+ res_size - 63);
+ res_size += 9;
+ }
+
+ sony_toc.start_track_lba = msf_to_log(sony_toc.tracks[0].track_start_msf);
+ sony_toc.lead_out_start_lba = msf_to_log(sony_toc.lead_out_start_msf);
+
+#if DEBUG
+ printk("Disk session %d, start track: %d, stop track: %d\n",
+ session,
+ sony_toc.start_track_lba,
+ sony_toc.lead_out_start_lba);
+#endif
+ }
+#if DEBUG
+ printk("Leaving sony_get_toc\n");
+#endif
+}
+
+
+/*
+ * Search for a specific track in the table of contents.
+ */
+static int
+find_track(int track)
+{
+ int i;
+ int num_tracks;
+
+
+ num_tracks = sony_toc.last_track_num - sony_toc.first_track_num + 1;
+ for (i = 0; i < num_tracks; i++)
+ {
+ if (sony_toc.tracks[i].track == track)
+ {
+ return i;
+ }
+ }
+
+ return -1;
+}
+
+
+/*
+ * Read the subcode and put it int last_sony_subcode for future use.
+ */
+static int
+read_subcode(void)
+{
+ unsigned int res_size;
+
+
+ do_sony_cd_cmd(SONY_REQ_SUBCODE_ADDRESS_CMD,
+ NULL,
+ 0,
+ (unsigned char *) &last_sony_subcode,
+ &res_size);
+ if ((res_size < 2) || ((last_sony_subcode.exec_status[0] & 0xf0) == 0x20))
+ {
+ printk("Sony CDROM error 0x%2.2x (read_subcode)\n",
+ last_sony_subcode.exec_status[1]);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+
+/*
+ * Get the subchannel info like the CDROMSUBCHNL command wants to see it. If
+ * the drive is playing, the subchannel needs to be read (since it would be
+ * changing). If the drive is paused or completed, the subcode information has
+ * already been stored, just use that. The ioctl call wants things in decimal
+ * (not BCD), so all the conversions are done.
+ */
+static int
+sony_get_subchnl_info(long arg)
+{
+ struct cdrom_subchnl schi;
+
+
+ /* Get attention stuff */
+ while (handle_sony_cd_attention())
+ ;
+
+ sony_get_toc();
+ if (!sony_toc_read)
+ {
+ return -EIO;
+ }
+
+ verify_area(VERIFY_READ, (char *) arg, sizeof(schi));
+ verify_area(VERIFY_WRITE, (char *) arg, sizeof(schi));
+
+ memcpy_fromfs(&schi, (char *) arg, sizeof(schi));
+
+ switch (sony_audio_status)
+ {
+ case CDROM_AUDIO_PLAY:
+ if (read_subcode() < 0)
+ {
+ return -EIO;
+ }
+ break;
+
+ case CDROM_AUDIO_PAUSED:
+ case CDROM_AUDIO_COMPLETED:
+ break;
+
+ case CDROM_AUDIO_NO_STATUS:
+ schi.cdsc_audiostatus = sony_audio_status;
+ memcpy_tofs((char *) arg, &schi, sizeof(schi));
+ return 0;
+ break;
+
+ case CDROM_AUDIO_INVALID:
+ case CDROM_AUDIO_ERROR:
+ default:
+ return -EIO;
+ }
+
+ schi.cdsc_audiostatus = sony_audio_status;
+ schi.cdsc_adr = last_sony_subcode.address;
+ schi.cdsc_ctrl = last_sony_subcode.control;
+ schi.cdsc_trk = bcd_to_int(last_sony_subcode.track_num);
+ schi.cdsc_ind = bcd_to_int(last_sony_subcode.index_num);
+ if (schi.cdsc_format == CDROM_MSF)
+ {
+ schi.cdsc_absaddr.msf.minute = bcd_to_int(last_sony_subcode.abs_msf[0]);
+ schi.cdsc_absaddr.msf.second = bcd_to_int(last_sony_subcode.abs_msf[1]);
+ schi.cdsc_absaddr.msf.frame = bcd_to_int(last_sony_subcode.abs_msf[2]);
+
+ schi.cdsc_reladdr.msf.minute = bcd_to_int(last_sony_subcode.rel_msf[0]);
+ schi.cdsc_reladdr.msf.second = bcd_to_int(last_sony_subcode.rel_msf[1]);
+ schi.cdsc_reladdr.msf.frame = bcd_to_int(last_sony_subcode.rel_msf[2]);
+ }
+ else if (schi.cdsc_format == CDROM_LBA)
+ {
+ schi.cdsc_absaddr.lba = msf_to_log(last_sony_subcode.abs_msf);
+ schi.cdsc_reladdr.lba = msf_to_log(last_sony_subcode.rel_msf);
+ }
+
+ memcpy_tofs((char *) arg, &schi, sizeof(schi));
+ return 0;
+}
+
+/* Get audio data from the drive. This is fairly complex because I
+ am looking for status and data at the same time, but if I get status
+ then I just look for data. I need to get the status immediately so
+ the switch from audio to data tracks will happen quickly. */
+static void
+read_audio_data(char *buffer,
+ unsigned char res_reg[],
+ int *res_size)
+{
+ unsigned int retry_count;
+ int result_read;
+
+
+ res_reg[0] = 0;
+ res_reg[1] = 0;
+ *res_size = 0;
+ result_read = 0;
+
+ /* Wait for the drive to tell us we have something */
+ retry_count = jiffies + SONY_JIFFIES_TIMEOUT;
+continue_read_audio_wait:
+ while ( (retry_count > jiffies)
+ && !(is_data_ready())
+ && !(is_result_ready() || result_read))
+ {
+ while (handle_sony_cd_attention())
+ ;
+
+ sony_sleep();
+ }
+ if (!(is_data_ready()))
+ {
+ if (is_result_ready() && !result_read)
+ {
+ get_result(res_reg, res_size);
+
+ /* Read block status and continue waiting for data. */
+ if ((res_reg[0] & 0xf0) == 0x50)
+ {
+ result_read = 1;
+ goto continue_read_audio_wait;
+ }
+ /* Invalid data from the drive. Shut down the operation. */
+ else if ((res_reg[0] & 0xf0) != 0x20)
+ {
+ printk("CDU31A: Got result that should have been error: %d\n",
+ res_reg[0]);
+ res_reg[0] = 0x20;
+ res_reg[1] = SONY_BAD_DATA_ERR;
+ *res_size = 2;
+ }
+ abort_read();
+ }
+ else
+ {
+#if DEBUG
+ printk("CDU31A timeout out %d\n", __LINE__);
+#endif
+ res_reg[0] = 0x20;
+ res_reg[1] = SONY_TIMEOUT_OP_ERR;
+ *res_size = 2;
+ abort_read();
+ }
+ }
+ else
+ {
+ clear_data_ready();
+
+ /* If data block, then get 2340 bytes offset by 12. */
+ if (sony_raw_data_mode)
+ {
+ insb(sony_cd_read_reg, buffer + CD_XA_HEAD, CD_FRAMESIZE_XA);
+ }
+ else
+ {
+ /* Audio gets the whole 2352 bytes. */
+ insb(sony_cd_read_reg, buffer, CD_FRAMESIZE_RAW);
+ }
+
+ /* If I haven't already gotten the result, get it now. */
+ if (!result_read)
+ {
+ /* Wait for the drive to tell us we have something */
+ retry_count = jiffies + SONY_JIFFIES_TIMEOUT;
+ while ((retry_count > jiffies) && !(is_result_ready()))
+ {
+ while (handle_sony_cd_attention())
+ ;
+
+ sony_sleep();
+ }
+
+ if (!is_result_ready())
+ {
+#if DEBUG
+ printk("CDU31A timeout out %d\n", __LINE__);
+#endif
+ res_reg[0] = 0x20;
+ res_reg[1] = SONY_TIMEOUT_OP_ERR;
+ *res_size = 2;
+ abort_read();
+ return;
+ }
+ else
+ {
+ get_result(res_reg, res_size);
+ }
+ }
+
+ if ((res_reg[0] & 0xf0) == 0x50)
+ {
+ if ( (res_reg[0] == SONY_NO_CIRC_ERR_BLK_STAT)
+ || (res_reg[0] == SONY_NO_LECC_ERR_BLK_STAT)
+ || (res_reg[0] == SONY_RECOV_LECC_ERR_BLK_STAT)
+ || (res_reg[0] == SONY_NO_ERR_DETECTION_STAT))
+ {
+ /* Ok, nothing to do. */
+ }
+ else
+ {
+ printk("CDU31A: Data block error: 0x%x\n", res_reg[0]);
+ res_reg[0] = 0x20;
+ res_reg[1] = SONY_BAD_DATA_ERR;
+ *res_size = 2;
+ }
+ }
+ else if ((res_reg[0] & 0xf0) != 0x20)
+ {
+ /* The drive gave me bad status, I don't know what to do.
+ Reset the driver and return an error. */
+ printk("CDU31A: Invalid block status: 0x%x\n", res_reg[0]);
+ restart_on_error();
+ res_reg[0] = 0x20;
+ res_reg[1] = SONY_BAD_DATA_ERR;
+ *res_size = 2;
+ }
+ }
+}
+
+/* Perform a raw data read. This will automatically detect the
+ track type and read the proper data (audio or data). */
+static int
+read_audio(struct cdrom_read_audio *ra,
+ struct inode *inode)
+{
+ int retval;
+ unsigned char params[2];
+ unsigned char res_reg[12];
+ unsigned int res_size;
+ unsigned int cframe;
+ unsigned long flags;
+
+ /*
+ * Make sure no one else is using the driver; wait for them
+ * to finish if it is so.
+ */
+ save_flags(flags);
+ cli();
+ while (sony_inuse)
+ {
+ interruptible_sleep_on(&sony_wait);
+ if (current->signal & ~current->blocked)
+ {
+ restore_flags(flags);
+ return -EAGAIN;
+ }
+ }
+ sony_inuse = 1;
+ has_cd_task = current;
+ restore_flags(flags);
+
+ if (!sony_spun_up)
+ {
+ scd_open (inode, NULL);
+ }
+
+ /* Set the drive to do raw operations. */
+ params[0] = SONY_SD_DECODE_PARAM;
+ params[1] = 0x06 | sony_raw_data_mode;
+ do_sony_cd_cmd(SONY_SET_DRIVE_PARAM_CMD,
+ params,
+ 2,
+ res_reg,
+ &res_size);
+ if ((res_size < 2) || ((res_reg[0] & 0xf0) == 0x20))
+ {
+ printk("CDU31A: Unable to set decode params: 0x%2.2x\n", res_reg[1]);
+ return -EIO;
+ }
+
+ /* From here down, we have to goto exit_read_audio instead of returning
+ because the drive parameters have to be set back to data before
+ return. */
+
+ retval = 0;
+ /* start_request clears out any readahead data, so it should be safe. */
+ if (start_request(ra->addr.lba, ra->nframes, 1))
+ {
+ retval = -EIO;
+ goto exit_read_audio;
+ }
+
+ /* For every requested frame. */
+ cframe = 0;
+ while (cframe < ra->nframes)
+ {
+ read_audio_data(readahead_buffer, res_reg, &res_size);
+ if ((res_reg[0] & 0xf0) == 0x20)
+ {
+ if (res_reg[1] == SONY_BAD_DATA_ERR)
+ {
+ printk("CDU31A: Data error on audio sector %d\n",
+ ra->addr.lba + cframe);
+ }
+ else if (res_reg[1] == SONY_ILL_TRACK_R_ERR)
+ {
+ /* Illegal track type, change track types and start over. */
+ sony_raw_data_mode = (sony_raw_data_mode) ? 0 : 1;
+
+ /* Set the drive mode. */
+ params[0] = SONY_SD_DECODE_PARAM;
+ params[1] = 0x06 | sony_raw_data_mode;
+ do_sony_cd_cmd(SONY_SET_DRIVE_PARAM_CMD,
+ params,
+ 2,
+ res_reg,
+ &res_size);
+ if ((res_size < 2) || ((res_reg[0] & 0xf0) == 0x20))
+ {
+ printk("CDU31A: Unable to set decode params: 0x%2.2x\n", res_reg[1]);
+ retval = -EIO;
+ goto exit_read_audio;
+ }
+
+ /* Restart the request on the current frame. */
+ if (start_request(ra->addr.lba + cframe, ra->nframes - cframe, 1))
+ {
+ retval = -EIO;
+ goto exit_read_audio;
+ }
+
+ /* Don't go back to the top because don't want to get into
+ and infinite loop. A lot of code gets duplicated, but
+ that's no big deal, I don't guess. */
+ read_audio_data(readahead_buffer, res_reg, &res_size);
+ if ((res_reg[0] & 0xf0) == 0x20)
+ {
+ if (res_reg[1] == SONY_BAD_DATA_ERR)
+ {
+ printk("CDU31A: Data error on audio sector %d\n",
+ ra->addr.lba + cframe);
+ }
+ else
+ {
+ printk("CDU31A: Error reading audio data on sector %d: 0x%x\n",
+ ra->addr.lba + cframe,
+ res_reg[1]);
+ retval = -EIO;
+ goto exit_read_audio;
+ }
+ }
+ else
+ {
+ memcpy_tofs((char *) (ra->buf + (CD_FRAMESIZE_RAW * cframe)),
+ (char *) readahead_buffer,
+ CD_FRAMESIZE_RAW);
+ }
+ }
+ else
+ {
+ printk("CDU31A: Error reading audio data on sector %d: 0x%x\n",
+ ra->addr.lba + cframe,
+ res_reg[1]);
+ retval = -EIO;
+ goto exit_read_audio;
+ }
+ }
+ else
+ {
+ memcpy_tofs((char *) (ra->buf + (CD_FRAMESIZE_RAW * cframe)),
+ (char *) readahead_buffer,
+ CD_FRAMESIZE_RAW);
+ }
+
+ cframe++;
+ }
+
+ get_result(res_reg, &res_size);
+ if ((res_reg[0] & 0xf0) == 0x20)
+ {
+ printk("CDU31A: Error return from audio read: 0x%x\n",
+ res_reg[1]);
+ retval = -EIO;
+ goto exit_read_audio;
+ }
+
+exit_read_audio:
+
+ /* Set the drive mode back to the proper one for the disk. */
+ params[0] = SONY_SD_DECODE_PARAM;
+ if (!sony_xa_mode)
+ {
+ params[1] = 0x0f;
+ }
+ else
+ {
+ params[1] = 0x07;
+ }
+ do_sony_cd_cmd(SONY_SET_DRIVE_PARAM_CMD,
+ params,
+ 2,
+ res_reg,
+ &res_size);
+ if ((res_size < 2) || ((res_reg[0] & 0xf0) == 0x20))
+ {
+ printk("CDU31A: Unable to reset decode params: 0x%2.2x\n", res_reg[1]);
+ return -EIO;
+ }
+
+ has_cd_task = NULL;
+ sony_inuse = 0;
+ wake_up_interruptible(&sony_wait);
+
+ return(retval);
+}
+
+static int
+do_sony_cd_cmd_chk(const char *name,
+ unsigned char cmd,
+ unsigned char *params,
+ unsigned int num_params,
+ unsigned char *result_buffer,
+ unsigned int *result_size)
+{
+ do_sony_cd_cmd(cmd, params, num_params, result_buffer, result_size);
+ if ((*result_size < 2) || ((result_buffer[0] & 0xf0) == 0x20))
+ {
+ printk("Sony CDROM error 0x%2.2x (CDROM%s)\n", result_buffer[1], name);
+ return -EIO;
+ }
+ return 0;
+}
+
+/*
+ * The big ugly ioctl handler.
+ */
+static int scd_ioctl(struct inode *inode,
+ struct file *file,
+ unsigned int cmd,
+ unsigned long arg)
+{
+ unsigned char res_reg[12];
+ unsigned int res_size;
+ unsigned char params[7];
+ int i;
+
+
+ if (!inode)
+ {
+ return -EINVAL;
+ }
+
+ switch (cmd)
+ {
+ case CDROMSTART: /* Spin up the drive */
+ return do_sony_cd_cmd_chk("START",SONY_SPIN_UP_CMD, NULL, 0, res_reg, &res_size);
+ return 0;
+ break;
+
+ case CDROMSTOP: /* Spin down the drive */
+ do_sony_cd_cmd(SONY_AUDIO_STOP_CMD, NULL, 0, res_reg, &res_size);
+
+ /*
+ * Spin the drive down, ignoring the error if the disk was
+ * already not spinning.
+ */
+ sony_audio_status = CDROM_AUDIO_NO_STATUS;
+ return do_sony_cd_cmd_chk("STOP",SONY_SPIN_DOWN_CMD, NULL, 0, res_reg, &res_size);
+
+ case CDROMPAUSE: /* Pause the drive */
+ if(do_sony_cd_cmd_chk("PAUSE", SONY_AUDIO_STOP_CMD, NULL, 0, res_reg, &res_size))
+ return -EIO;
+ /* Get the current position and save it for resuming */
+ if (read_subcode() < 0)
+ {
+ return -EIO;
+ }
+ cur_pos_msf[0] = last_sony_subcode.abs_msf[0];
+ cur_pos_msf[1] = last_sony_subcode.abs_msf[1];
+ cur_pos_msf[2] = last_sony_subcode.abs_msf[2];
+ sony_audio_status = CDROM_AUDIO_PAUSED;
+ return 0;
+ break;
+
+ case CDROMRESUME: /* Start the drive after being paused */
+ if (sony_audio_status != CDROM_AUDIO_PAUSED)
+ {
+ return -EINVAL;
+ }
+
+ do_sony_cd_cmd(SONY_SPIN_UP_CMD, NULL, 0, res_reg, &res_size);
+
+ /* Start the drive at the saved position. */
+ params[1] = cur_pos_msf[0];
+ params[2] = cur_pos_msf[1];
+ params[3] = cur_pos_msf[2];
+ params[4] = final_pos_msf[0];
+ params[5] = final_pos_msf[1];
+ params[6] = final_pos_msf[2];
+ params[0] = 0x03;
+ if(do_sony_cd_cmd_chk("RESUME",SONY_AUDIO_PLAYBACK_CMD, params, 7, res_reg, &res_size)<0)
+ return -EIO;
+ sony_audio_status = CDROM_AUDIO_PLAY;
+ return 0;
+
+ case CDROMPLAYMSF: /* Play starting at the given MSF address. */
+ i=verify_area(VERIFY_READ, (char *) arg, 6);
+ if(i)
+ return i;
+ do_sony_cd_cmd(SONY_SPIN_UP_CMD, NULL, 0, res_reg, &res_size);
+ memcpy_fromfs(&(params[1]), (void *) arg, 6);
+
+ /* The parameters are given in int, must be converted */
+ for (i=1; i<7; i++)
+ {
+ params[i] = int_to_bcd(params[i]);
+ }
+ params[0] = 0x03;
+ if(do_sony_cd_cmd_chk("PLAYMSF",SONY_AUDIO_PLAYBACK_CMD, params, 7, res_reg, &res_size)<0)
+ return -EIO;
+
+ /* Save the final position for pauses and resumes */
+ final_pos_msf[0] = params[4];
+ final_pos_msf[1] = params[5];
+ final_pos_msf[2] = params[6];
+ sony_audio_status = CDROM_AUDIO_PLAY;
+ return 0;
+
+ case CDROMREADTOCHDR: /* Read the table of contents header */
+ {
+ struct cdrom_tochdr *hdr;
+ struct cdrom_tochdr loc_hdr;
+
+ sony_get_toc();
+ if (!sony_toc_read)
+ {
+ return -EIO;
+ }
+
+ hdr = (struct cdrom_tochdr *) arg;
+ i=verify_area(VERIFY_WRITE, hdr, sizeof(*hdr));
+ if(i<0)
+ return i;
+ loc_hdr.cdth_trk0 = bcd_to_int(sony_toc.first_track_num);
+ loc_hdr.cdth_trk1 = bcd_to_int(sony_toc.last_track_num);
+ memcpy_tofs(hdr, &loc_hdr, sizeof(*hdr));
+ }
+ return 0;
+
+ case CDROMREADTOCENTRY: /* Read a given table of contents entry */
+ {
+ struct cdrom_tocentry *entry;
+ struct cdrom_tocentry loc_entry;
+ int track_idx;
+ unsigned char *msf_val = NULL;
+
+ sony_get_toc();
+ if (!sony_toc_read)
+ {
+ return -EIO;
+ }
+
+ entry = (struct cdrom_tocentry *) arg;
+ i=verify_area(VERIFY_READ, entry, sizeof(*entry));
+ if(i<0)
+ return i;
+ i=verify_area(VERIFY_WRITE, entry, sizeof(*entry));
+ if(i<0)
+ return i;
+
+ memcpy_fromfs(&loc_entry, entry, sizeof(loc_entry));
+
+ /* Lead out is handled separately since it is special. */
+ if (loc_entry.cdte_track == CDROM_LEADOUT)
+ {
+ loc_entry.cdte_adr = sony_toc.address2;
+ loc_entry.cdte_ctrl = sony_toc.control2;
+ msf_val = sony_toc.lead_out_start_msf;
+ }
+ else
+ {
+ track_idx = find_track(int_to_bcd(loc_entry.cdte_track));
+ if (track_idx < 0)
+ {
+ return -EINVAL;
+ }
+
+ loc_entry.cdte_adr = sony_toc.tracks[track_idx].address;
+ loc_entry.cdte_ctrl = sony_toc.tracks[track_idx].control;
+ msf_val = sony_toc.tracks[track_idx].track_start_msf;
+ }
+
+ /* Logical buffer address or MSF format requested? */
+ if (loc_entry.cdte_format == CDROM_LBA)
+ {
+ loc_entry.cdte_addr.lba = msf_to_log(msf_val);
+ }
+ else if (loc_entry.cdte_format == CDROM_MSF)
+ {
+ loc_entry.cdte_addr.msf.minute = bcd_to_int(*msf_val);
+ loc_entry.cdte_addr.msf.second = bcd_to_int(*(msf_val+1));
+ loc_entry.cdte_addr.msf.frame = bcd_to_int(*(msf_val+2));
+ }
+ memcpy_tofs(entry, &loc_entry, sizeof(*entry));
+ }
+ return 0;
+ break;
+
+ case CDROMPLAYTRKIND: /* Play a track. This currently ignores index. */
+ {
+ struct cdrom_ti ti;
+ int track_idx;
+
+ sony_get_toc();
+ if (!sony_toc_read)
+ {
+ return -EIO;
+ }
+
+ i=verify_area(VERIFY_READ, (char *) arg, sizeof(ti));
+ if(i<0)
+ return i;
+
+ memcpy_fromfs(&ti, (char *) arg, sizeof(ti));
+ if ( (ti.cdti_trk0 < sony_toc.first_track_num)
+ || (ti.cdti_trk0 > sony_toc.last_track_num)
+ || (ti.cdti_trk1 < ti.cdti_trk0))
+ {
+ return -EINVAL;
+ }
+
+ track_idx = find_track(int_to_bcd(ti.cdti_trk0));
+ if (track_idx < 0)
+ {
+ return -EINVAL;
+ }
+ params[1] = sony_toc.tracks[track_idx].track_start_msf[0];
+ params[2] = sony_toc.tracks[track_idx].track_start_msf[1];
+ params[3] = sony_toc.tracks[track_idx].track_start_msf[2];
+
+ /*
+ * If we want to stop after the last track, use the lead-out
+ * MSF to do that.
+ */
+ if (ti.cdti_trk1 >= bcd_to_int(sony_toc.last_track_num))
+ {
+ log_to_msf(msf_to_log(sony_toc.lead_out_start_msf)-1,
+ &(params[4]));
+ }
+ else
+ {
+ track_idx = find_track(int_to_bcd(ti.cdti_trk1+1));
+ if (track_idx < 0)
+ {
+ return -EINVAL;
+ }
+ log_to_msf(msf_to_log(sony_toc.tracks[track_idx].track_start_msf)-1,
+ &(params[4]));
+ }
+ params[0] = 0x03;
+
+ do_sony_cd_cmd(SONY_SPIN_UP_CMD, NULL, 0, res_reg, &res_size);
+
+ do_sony_cd_cmd(SONY_AUDIO_PLAYBACK_CMD, params, 7, res_reg, &res_size);
+
+ if ((res_size < 2) || ((res_reg[0] & 0xf0) == 0x20))
+ {
+ printk("Params: %x %x %x %x %x %x %x\n", params[0], params[1],
+ params[2], params[3], params[4], params[5], params[6]);
+ printk("Sony CDROM error 0x%2.2x (CDROMPLAYTRKIND\n", res_reg[1]);
+ return -EIO;
+ }
+
+ /* Save the final position for pauses and resumes */
+ final_pos_msf[0] = params[4];
+ final_pos_msf[1] = params[5];
+ final_pos_msf[2] = params[6];
+ sony_audio_status = CDROM_AUDIO_PLAY;
+ return 0;
+ }
+
+ case CDROMSUBCHNL: /* Get subchannel info */
+ return sony_get_subchnl_info(arg);
+
+ case CDROMVOLCTRL: /* Volume control. What volume does this change, anyway? */
+ {
+ struct cdrom_volctrl volctrl;
+
+ i=verify_area(VERIFY_READ, (char *) arg, sizeof(volctrl));
+ if(i<0)
+ return i;
+
+ memcpy_fromfs(&volctrl, (char *) arg, sizeof(volctrl));
+ params[0] = SONY_SD_AUDIO_VOLUME;
+ params[1] = volctrl.channel0;
+ params[2] = volctrl.channel1;
+ return do_sony_cd_cmd_chk("VOLCTRL",SONY_SET_DRIVE_PARAM_CMD, params, 3, res_reg, &res_size);
+ }
+ case CDROMEJECT: /* Eject the drive */
+ do_sony_cd_cmd(SONY_AUDIO_STOP_CMD, NULL, 0, res_reg, &res_size);
+ do_sony_cd_cmd(SONY_SPIN_DOWN_CMD, NULL, 0, res_reg, &res_size);
+
+ sony_audio_status = CDROM_AUDIO_INVALID;
+ return do_sony_cd_cmd_chk("EJECT",SONY_EJECT_CMD, NULL, 0, res_reg, &res_size);
+
+ case CDROMREADAUDIO: /* Read 2352 byte audio tracks and 2340 byte
+ raw data tracks. */
+ {
+ struct cdrom_read_audio ra;
+
+
+ sony_get_toc();
+ if (!sony_toc_read)
+ {
+ return -EIO;
+ }
+
+ i=verify_area(VERIFY_READ, (char *) arg, sizeof(ra));
+ if(i<0)
+ return i;
+ memcpy_fromfs(&ra, (char *) arg, sizeof(ra));
+
+ i=verify_area(VERIFY_WRITE, ra.buf, CD_FRAMESIZE_RAW * ra.nframes);
+ if(i<0)
+ return i;
+
+ if (ra.addr_format == CDROM_LBA)
+ {
+ if ( (ra.addr.lba >= sony_toc.lead_out_start_lba)
+ || (ra.addr.lba + ra.nframes >= sony_toc.lead_out_start_lba))
+ {
+ return -EINVAL;
+ }
+ }
+ else if (ra.addr_format == CDROM_MSF)
+ {
+ if ( (ra.addr.msf.minute >= 75)
+ || (ra.addr.msf.second >= 60)
+ || (ra.addr.msf.frame >= 75))
+ {
+ return -EINVAL;
+ }
+
+ ra.addr.lba = ( (ra.addr.msf.minute * 4500)
+ + (ra.addr.msf.second * 75)
+ + ra.addr.msf.frame);
+ if ( (ra.addr.lba >= sony_toc.lead_out_start_lba)
+ || (ra.addr.lba + ra.nframes >= sony_toc.lead_out_start_lba))
+ {
+ return -EINVAL;
+ }
+
+ /* I know, this can go negative on an unsigned. However,
+ the first thing done to the data is to add this value,
+ so this should compensate and allow direct msf access. */
+ ra.addr.lba -= LOG_START_OFFSET;
+ }
+ else
+ {
+ return -EINVAL;
+ }
+
+ return(read_audio(&ra, inode));
+ }
+ return 0;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+
+/*
+ * Open the drive for operations. Spin the drive up and read the table of
+ * contents if these have not already been done.
+ */
+static int
+scd_open(struct inode *inode,
+ struct file *filp)
+{
+ unsigned char res_reg[12];
+ unsigned int res_size;
+ int num_spin_ups;
+ unsigned char params[2];
+
+
+ if ((filp) && filp->f_mode & 2)
+ return -EROFS;
+
+ if (!sony_spun_up)
+ {
+ num_spin_ups = 0;
+
+respinup_on_open:
+ do_sony_cd_cmd(SONY_SPIN_UP_CMD, NULL, 0, res_reg, &res_size);
+
+ /* The drive sometimes returns error 0. I don't know why, but ignore
+ it. It seems to mean the drive has already done the operation. */
+ if ((res_size < 2) || ((res_reg[0] != 0) && (res_reg[1] != 0)))
+ {
+ printk("Sony CDROM error 0x%2.2x (scd_open, spin up)\n", res_reg[1]);
+ return -EIO;
+ }
+
+ do_sony_cd_cmd(SONY_READ_TOC_CMD, NULL, 0, res_reg, &res_size);
+
+ /* The drive sometimes returns error 0. I don't know why, but ignore
+ it. It seems to mean the drive has already done the operation. */
+ if ((res_size < 2) || ((res_reg[0] != 0) && (res_reg[1] != 0)))
+ {
+ /* If the drive is already playing, it's ok. */
+ if ((res_reg[1] == SONY_AUDIO_PLAYING_ERR) || (res_reg[1] == 0))
+ {
+ goto drive_spinning;
+ }
+
+ /* If the drive says it is not spun up (even though we just did it!)
+ then retry the operation at least a few times. */
+ if ( (res_reg[1] == SONY_NOT_SPIN_ERR)
+ && (num_spin_ups < MAX_CDU31A_RETRIES))
+ {
+ num_spin_ups++;
+ goto respinup_on_open;
+ }
+
+ printk("Sony CDROM error 0x%2.2x (scd_open, read toc)\n", res_reg[1]);
+ do_sony_cd_cmd(SONY_SPIN_DOWN_CMD, NULL, 0, res_reg, &res_size);
+
+ return -EIO;
+ }
+
+ sony_get_toc();
+ if (!sony_toc_read)
+ {
+ do_sony_cd_cmd(SONY_SPIN_DOWN_CMD, NULL, 0, res_reg, &res_size);
+ return -EIO;
+ }
+
+ /* For XA on the CDU31A only, we have to do special reads.
+ The CDU33A handles XA automagically. */
+ if ( (sony_toc.disk_type == SONY_XA_DISK_TYPE)
+ && (!is_double_speed))
+ {
+ params[0] = SONY_SD_DECODE_PARAM;
+ params[1] = 0x07;
+ do_sony_cd_cmd(SONY_SET_DRIVE_PARAM_CMD,
+ params,
+ 2,
+ res_reg,
+ &res_size);
+ if ((res_size < 2) || ((res_reg[0] & 0xf0) == 0x20))
+ {
+ printk("CDU31A: Unable to set XA params: 0x%2.2x\n", res_reg[1]);
+ }
+ sony_xa_mode = 1;
+ }
+ /* A non-XA disk. Set the parms back if necessary. */
+ else if (sony_xa_mode)
+ {
+ params[0] = SONY_SD_DECODE_PARAM;
+ params[1] = 0x0f;
+ do_sony_cd_cmd(SONY_SET_DRIVE_PARAM_CMD,
+ params,
+ 2,
+ res_reg,
+ &res_size);
+ if ((res_size < 2) || ((res_reg[0] & 0xf0) == 0x20))
+ {
+ printk("CDU31A: Unable to reset XA params: 0x%2.2x\n", res_reg[1]);
+ }
+ sony_xa_mode = 0;
+ }
+
+ sony_spun_up = 1;
+ }
+
+drive_spinning:
+
+ /* If filp is not NULL (standard open), try a disk change. */
+ if (filp)
+ {
+ check_disk_change(inode->i_rdev);
+ }
+
+ sony_usage++;
+ MOD_INC_USE_COUNT;
+
+ return 0;
+}
+
+
+/*
+ * Close the drive. Spin it down if no task is using it. The spin
+ * down will fail if playing audio, so audio play is OK.
+ */
+static void
+scd_release(struct inode *inode,
+ struct file *filp)
+{
+ unsigned char res_reg[12];
+ unsigned int res_size;
+
+
+ if (sony_usage > 0)
+ {
+ sony_usage--;
+ MOD_DEC_USE_COUNT;
+ }
+ if (sony_usage == 0)
+ {
+ sync_dev(inode->i_rdev);
+ do_sony_cd_cmd(SONY_SPIN_DOWN_CMD, NULL, 0, res_reg, &res_size);
+
+ sony_spun_up = 0;
+ }
+}
+
+
+static struct file_operations scd_fops = {
+ NULL, /* lseek - default */
+ block_read, /* read - general block-dev read */
+ block_write, /* write - general block-dev write */
+ NULL, /* readdir - bad */
+ NULL, /* select */
+ scd_ioctl, /* ioctl */
+ NULL, /* mmap */
+ scd_open, /* open */
+ scd_release, /* release */
+ NULL, /* fsync */
+ NULL, /* fasync */
+ scd_disk_change, /* media_change */
+ NULL /* revalidate */
+};
+
+
+/* The different types of disc loading mechanisms supported */
+static const char *load_mech[] = { "caddy", "tray", "pop-up", "unknown" };
+
+static void
+get_drive_configuration(unsigned short base_io,
+ unsigned char res_reg[],
+ unsigned int *res_size)
+{
+ int retry_count;
+
+
+ /* Set the base address */
+ cdu31a_port = base_io;
+
+ /* Set up all the register locations */
+ sony_cd_cmd_reg = cdu31a_port + SONY_CMD_REG_OFFSET;
+ sony_cd_param_reg = cdu31a_port + SONY_PARAM_REG_OFFSET;
+ sony_cd_write_reg = cdu31a_port + SONY_WRITE_REG_OFFSET;
+ sony_cd_control_reg = cdu31a_port + SONY_CONTROL_REG_OFFSET;
+ sony_cd_status_reg = cdu31a_port + SONY_STATUS_REG_OFFSET;
+ sony_cd_result_reg = cdu31a_port + SONY_RESULT_REG_OFFSET;
+ sony_cd_read_reg = cdu31a_port + SONY_READ_REG_OFFSET;
+ sony_cd_fifost_reg = cdu31a_port + SONY_FIFOST_REG_OFFSET;
+
+ /*
+ * Check to see if anything exists at the status register location.
+ * I don't know if this is a good way to check, but it seems to work
+ * ok for me.
+ */
+ if (read_status_register() != 0xff)
+ {
+ /*
+ * Reset the drive and wait for attention from it (to say it's reset).
+ * If you don't wait, the next operation will probably fail.
+ */
+ reset_drive();
+ retry_count = jiffies + SONY_RESET_TIMEOUT;
+ while ((retry_count > jiffies) && (!is_attention()))
+ {
+ sony_sleep();
+ }
+
+#if 0
+ /* If attention is never seen probably not a CDU31a present */
+ if (!is_attention())
+ {
+ res_reg[0] = 0x20;
+ return;
+ }
+#endif
+
+ /*
+ * Get the drive configuration.
+ */
+ do_sony_cd_cmd(SONY_REQ_DRIVE_CONFIG_CMD,
+ NULL,
+ 0,
+ (unsigned char *) res_reg,
+ res_size);
+ return;
+ }
+
+ /* Return an error */
+ res_reg[0] = 0x20;
+}
+
+#ifndef MODULE
+/*
+ * Set up base I/O and interrupts, called from main.c.
+ */
+void
+cdu31a_setup(char *strings,
+ int *ints)
+{
+ if (ints[0] > 0)
+ {
+ cdu31a_port = ints[1];
+ }
+ if (ints[0] > 1)
+ {
+ cdu31a_irq = ints[2];
+ }
+ if ((strings != NULL) && (*strings != '\0'))
+ {
+ if (strcmp(strings, "PAS") == 0)
+ {
+ sony_pas_init = 1;
+ }
+ else
+ {
+ printk("CDU31A: Unknown interface type: %s\n", strings);
+ }
+ }
+}
+#endif
+
+static int cdu31a_block_size;
+
+/*
+ * Initialize the driver.
+ */
+#ifdef MODULE
+#define cdu31a_init init_module
+#endif
+
+int
+cdu31a_init(void)
+{
+ struct s_sony_drive_config drive_config;
+ unsigned int res_size;
+ int i;
+ int drive_found;
+ int tmp_irq;
+
+
+ /*
+ * According to Alex Freed (freed@europa.orion.adobe.com), this is
+ * required for the Fusion CD-16 package. If the sound driver is
+ * loaded, it should work fine, but just in case...
+ *
+ * The following turn on the CD-ROM interface for a Fusion CD-16.
+ */
+ if (sony_pas_init)
+ {
+ outb(0xbc, 0x9a01);
+ outb(0xe2, 0x9a01);
+ }
+
+ drive_found = 0;
+
+ /* Setting the base I/O address to 0xffff will disable it. */
+ if (cdu31a_port == 0xffff)
+ {
+ }
+ else if (cdu31a_port != 0)
+ {
+ tmp_irq = cdu31a_irq; /* Need IRQ 0 because we can't sleep here. */
+ cdu31a_irq = 0;
+
+ get_drive_configuration(cdu31a_port,
+ drive_config.exec_status,
+ &res_size);
+ if ((res_size > 2) && ((drive_config.exec_status[0] & 0xf0) == 0x00))
+ {
+ drive_found = 1;
+ }
+
+ cdu31a_irq = tmp_irq;
+ }
+ else
+ {
+ cdu31a_irq = 0;
+ i = 0;
+ while ( (cdu31a_addresses[i].base != 0)
+ && (!drive_found))
+ {
+ if (check_region(cdu31a_addresses[i].base, 4)) {
+ i++;
+ continue;
+ }
+ get_drive_configuration(cdu31a_addresses[i].base,
+ drive_config.exec_status,
+ &res_size);
+ if ((res_size > 2) && ((drive_config.exec_status[0] & 0xf0) == 0x00))
+ {
+ drive_found = 1;
+ cdu31a_irq = cdu31a_addresses[i].int_num;
+ }
+ else
+ {
+ i++;
+ }
+ }
+ }
+
+ if (drive_found)
+ {
+ request_region(cdu31a_port, 4,"cdu31a");
+
+ if (register_blkdev(MAJOR_NR,"cdu31a",&scd_fops))
+ {
+ printk("Unable to get major %d for CDU-31a\n", MAJOR_NR);
+ return -EIO;
+ }
+
+ if (SONY_HWC_DOUBLE_SPEED(drive_config))
+ {
+ is_double_speed = 1;
+ }
+
+ tmp_irq = cdu31a_irq; /* Need IRQ 0 because we can't sleep here. */
+ cdu31a_irq = 0;
+
+ set_drive_params();
+
+ cdu31a_irq = tmp_irq;
+
+ if (cdu31a_irq > 0)
+ {
+ if (request_irq(cdu31a_irq, cdu31a_interrupt, SA_INTERRUPT, "cdu31a"))
+ {
+ printk("Unable to grab IRQ%d for the CDU31A driver\n", cdu31a_irq);
+ cdu31a_irq = 0;
+ }
+ }
+
+ printk("Sony I/F CDROM : %8.8s %16.16s %8.8s\n",
+ drive_config.vendor_id,
+ drive_config.product_id,
+ drive_config.product_rev_level);
+ printk(" Capabilities: %s",
+ load_mech[SONY_HWC_GET_LOAD_MECH(drive_config)]);
+ if (SONY_HWC_AUDIO_PLAYBACK(drive_config))
+ {
+ printk(", audio");
+ }
+ if (SONY_HWC_EJECT(drive_config))
+ {
+ printk(", eject");
+ }
+ if (SONY_HWC_LED_SUPPORT(drive_config))
+ {
+ printk(", LED");
+ }
+ if (SONY_HWC_ELECTRIC_VOLUME(drive_config))
+ {
+ printk(", elec. Vol");
+ }
+ if (SONY_HWC_ELECTRIC_VOLUME_CTL(drive_config))
+ {
+ printk(", sep. Vol");
+ }
+ if (is_double_speed)
+ {
+ printk(", double speed");
+ }
+ if (cdu31a_irq > 0)
+ {
+ printk(", irq %d", cdu31a_irq);
+ }
+ printk("\n");
+
+ blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST;
+ read_ahead[MAJOR_NR] = CDU31A_READAHEAD;
+ cdu31a_block_size = 1024; /* 1kB default block size */
+ /* use 'mount -o block=2048' */
+ blksize_size[MAJOR_NR] = &cdu31a_block_size;
+
+ cdu31a_abort_timer.next = NULL;
+ cdu31a_abort_timer.prev = NULL;
+ cdu31a_abort_timer.function = handle_abort_timeout;
+ }
+
+
+ disk_changed = 1;
+
+ if (drive_found)
+ {
+ return(0);
+ }
+ else
+ {
+ return -EIO;
+ }
+}
+
+#ifdef MODULE
+void
+cleanup_module(void)
+{
+ if ((unregister_blkdev(MAJOR_NR, "cdu31a") == -EINVAL))
+ {
+ printk("Can't unregister cdu31a\n");
+ return;
+ }
+ release_region(cdu31a_port,4);
+ printk("cdu31a module released.\n");
+}
+#endif MODULE
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov
with Sam's (original) version of this