diff options
Diffstat (limited to 'drivers/cdrom/cdu31a.c')
| -rw-r--r-- | drivers/cdrom/cdu31a.c | 3251 |
1 files changed, 0 insertions, 3251 deletions
diff --git a/drivers/cdrom/cdu31a.c b/drivers/cdrom/cdu31a.c deleted file mode 100644 index 2157c58755e0..000000000000 --- a/drivers/cdrom/cdu31a.c +++ /dev/null @@ -1,3251 +0,0 @@ -/* -* Sony CDU-31A CDROM interface device driver. -* -* Corey Minyard (minyard@wf-rch.cirr.com) -* -* Colossians 3:17 -* -* See Documentation/cdrom/cdu31a for additional details about this driver. -* -* 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 (time_before(jiffies, retry_count) && (! <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. - * - * 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. - * - * TODO: - * CDs with form1 and form2 sectors cause problems - * with current read-ahead strategy. - * - * Credits: - * Heiko Eissfeldt <heiko@colossus.escape.de> - * For finding abug in the return of the track numbers. - * TOC processing redone for proper multisession support. - * - * - * It probably a little late to be adding a history, but I guess I - * will start. - * - * 10/24/95 - Added support for disabling the eject button when the - * drive is open. Note that there is a small problem - * still here, if the eject button is pushed while the - * drive light is flashing, the drive will return a bad - * status and be reset. It recovers, though. - * - * 03/07/97 - Fixed a problem with timers. - * - * - * 18 Spetember 1997 -- Ported to Uniform CD-ROM driver by - * Heiko Eissfeldt <heiko@colossus.escape.de> with additional - * changes by Erik Andersen <andersee@debian.org> - * - * 24 January 1998 -- Removed the scd_disc_status() function, which was now - * just dead code left over from the port. - * Erik Andersen <andersee@debian.org> - * - * 16 July 1998 -- Drive donated to Erik Andersen by John Kodis - * <kodis@jagunet.com>. Work begun on fixing driver to - * work under 2.1.X. Added temporary extra printks - * which seem to slow it down enough to work. - * - * 9 November 1999 -- Make kernel-parameter implementation work with 2.3.x - * Removed init_module & cleanup_module in favor of - * module_init & module_exit. - * Torben Mathiasen <tmm@image.dk> - * - * 22 October 2004 -- Make the driver work in 2.6.X - * Added workaround to fix hard lockups on eject - * Fixed door locking problem after mounting empty drive - * Set double-speed drives to double speed by default - * Removed all readahead things - not needed anymore - * Ondrej Zary <rainbow@rainbow-software.org> -*/ - -#define DEBUG 1 - -#include <linux/major.h> -#include <linux/module.h> -#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/slab.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/cdrom.h> - -#include <asm/system.h> -#include <asm/io.h> -#include <asm/uaccess.h> -#include <asm/dma.h> - -#include "cdu31a.h" - -#define MAJOR_NR CDU31A_CDROM_MAJOR -#include <linux/blkdev.h> - -#define CDU31A_MAX_CONSECUTIVE_ATTENTIONS 10 - -#define PFX "CDU31A: " - -/* -** 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[] __initdata = { - {0} -}; - -static int handle_sony_cd_attention(void); -static int read_subcode(void); -static void sony_get_toc(void); -static int scd_spinup(void); -/*static int scd_open(struct inode *inode, struct file *filp);*/ -static int scd_open(struct cdrom_device_info *, int); -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; -module_param(cdu31a_port, uint, 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 struct request_queue *cdu31a_queue; -static DEFINE_SPINLOCK(cdu31a_lock); /* queue lock */ - -static int sony_spun_up = 0; /* Has the drive been spun up? */ - -static int sony_speed = 0; /* Last wanted speed */ - -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 single_toc; /* Holds the - table of - contents. */ - -static struct s_all_sessions_toc sony_toc; /* entries gathered from all - sessions */ - -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 DECLARE_MUTEX(sony_sem); /* Semaphore for drive hardware access */ - -static int is_double_speed = 0; /* does the drive support double speed ? */ - -static int is_auto_eject = 1; /* Door has been locked? 1=No/0=Yes */ - -/* - * 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; -module_param(cdu31a_irq, int, 0); - -/* The interrupt handler will wake this queue up when it gets an - interrupts. */ -static DECLARE_WAIT_QUEUE_HEAD(cdu31a_irq_wait); -static int irq_flag = 0; - -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; - -/* This was readahead_buffer once... Now it's used only for audio reads */ -static char audio_buffer[CD_FRAMESIZE_RAW]; - -/* 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; - -/* - * Uniform cdrom interface function - * report back, if disc has changed from time of last request. - */ -static int scd_media_changed(struct cdrom_device_info *cdi, int disc_nr) -{ - int retval; - - retval = disk_changed; - disk_changed = 0; - - return retval; -} - -/* - * Uniform cdrom interface function - * report back, if drive is ready - */ -static int scd_drive_status(struct cdrom_device_info *cdi, int slot_nr) -{ - if (CDSL_CURRENT != slot_nr) - /* we have no changer support */ - return -EINVAL; - if (sony_spun_up) - return CDS_DISC_OK; - if (down_interruptible(&sony_sem)) - return -ERESTARTSYS; - if (scd_spinup() == 0) - sony_spun_up = 1; - up(&sony_sem); - return sony_spun_up ? CDS_DISC_OK : CDS_DRIVE_NOT_READY; -} - -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) -{ - if (cdu31a_irq <= 0) { - yield(); - } else { /* Interrupt driven */ - DEFINE_WAIT(w); - int first = 1; - - while (1) { - prepare_to_wait(&cdu31a_irq_wait, &w, - TASK_INTERRUPTIBLE); - if (first) { - enable_interrupts(); - first = 0; - } - - if (irq_flag != 0) - break; - if (!signal_pending(current)) { - schedule(); - continue; - } else - disable_interrupts(); - break; - } - finish_wait(&cdu31a_irq_wait, &w); - irq_flag = 0; - } -} - - -/* - * 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; - sony_toc_read = 0; - outb(SONY_DRIVE_RESET_BIT, sony_cd_control_reg); -} - -/* - * Uniform cdrom interface function - * reset drive and return when it is ready - */ -static int scd_reset(struct cdrom_device_info *cdi) -{ - unsigned long retry_count; - - if (down_interruptible(&sony_sem)) - return -ERESTARTSYS; - reset_drive(); - - retry_count = jiffies + SONY_RESET_TIMEOUT; - while (time_before(jiffies, retry_count) && (!is_attention())) { - sony_sleep(); - } - - up(&sony_sem); - return 0; -} - -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 irqreturn_t cdu31a_interrupt(int irq, void *dev_id) -{ - 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 (waitqueue_active(&cdu31a_irq_wait)) { - disable_interrupts(); - irq_flag = 1; - wake_up_interruptible(&cdu31a_irq_wait); - } - } else if (waitqueue_active(&cdu31a_irq_wait)) { - disable_interrupts(); - irq_flag = 1; - wake_up_interruptible(&cdu31a_irq_wait); - } else { - disable_interrupts(); - printk(KERN_NOTICE PFX - "Got an interrupt but nothing was waiting\n"); - } - return IRQ_HANDLED; -} - -/* - * give more verbose error messages - */ -static unsigned char *translate_error(unsigned char err_code) -{ - static unsigned char errbuf[80]; - - switch (err_code) { - case 0x10: return "illegal command "; - case 0x11: return "illegal parameter "; - - case 0x20: return "not loaded "; - case 0x21: return "no disc "; - case 0x22: return "not spinning "; - case 0x23: return "spinning "; - case 0x25: return "spindle servo "; - case 0x26: return "focus servo "; - case 0x29: return "eject mechanism "; - case 0x2a: return "audio playing "; - case 0x2c: return "emergency eject "; - - case 0x30: return "focus "; - case 0x31: return "frame sync "; - case 0x32: return "subcode address "; - case 0x33: return "block sync "; - case 0x34: return "header address "; - - case 0x40: return "illegal track read "; - case 0x41: return "mode 0 read "; - case 0x42: return "illegal mode read "; - case 0x43: return "illegal block size read "; - case 0x44: return "mode read "; - case 0x45: return "form read "; - case 0x46: return "leadout read "; - case 0x47: return "buffer overrun "; - - case 0x53: return "unrecoverable CIRC "; - case 0x57: return "unrecoverable LECC "; - - case 0x60: return "no TOC "; - case 0x61: return "invalid subcode data "; - case 0x63: return "focus on TOC read "; - case 0x64: return "frame sync on TOC read "; - case 0x65: return "TOC data "; - - case 0x70: return "hardware failure "; - case 0x91: return "leadin "; - case 0x92: return "leadout "; - case 0x93: return "data track "; - } - sprintf(errbuf, "unknown 0x%02x ", err_code); - return errbuf; -} - -/* - * Set the drive parameters so the drive will auto-spin-up when a - * disk is inserted. - */ -static void set_drive_params(int want_doublespeed) -{ - 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(KERN_NOTICE PFX - "Unable to set spin-down time: 0x%2.2x\n", res_reg[1]); - } - - params[0] = SONY_SD_MECH_CONTROL; - params[1] = SONY_AUTO_SPIN_UP_BIT; /* Set auto spin up */ - - if (is_auto_eject) - params[1] |= SONY_AUTO_EJECT_BIT; - - if (is_double_speed && want_doublespeed) { - params[1] |= SONY_DOUBLE_SPEED_BIT; /* 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(KERN_NOTICE PFX "Unable to set mechanical " - "parameters: 0x%2.2x\n", res_reg[1]); - } -} - -/* - * Uniform cdrom interface function - * select reading speed for data access - */ -static int scd_select_speed(struct cdrom_device_info *cdi, int speed) -{ - if (speed == 0) - sony_speed = 1; - else - sony_speed = speed - 1; - - if (down_interruptible(&sony_sem)) - return -ERESTARTSYS; - set_drive_params(sony_speed); - up(&sony_sem); - return 0; -} - -/* - * Uniform cdrom interface function - * lock or unlock eject button - */ -static int scd_lock_door(struct cdrom_device_info *cdi, int lock) -{ - if (lock == 0) { - is_auto_eject = 1; - } else { - is_auto_eject = 0; - } - if (down_interruptible(&sony_sem)) - return -ERESTARTSYS; - set_drive_params(sony_speed); - up(&sony_sem); - return 0; -} - -/* - * 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 long retry_count; - - - printk(KERN_NOTICE PFX "Resetting drive on error\n"); - reset_drive(); - retry_count = jiffies + SONY_RESET_TIMEOUT; - while (time_before(jiffies, retry_count) && (!is_attention())) { - sony_sleep(); - } - set_drive_params(sony_speed); - do_sony_cd_cmd(SONY_SPIN_UP_CMD, NULL, 0, res_reg, &res_size); - if ((res_size < 2) || ((res_reg[0] & 0xf0) == 0x20)) { - printk(KERN_NOTICE PFX "Unable to spin up drive: 0x%2.2x\n", - res_reg[1]); - } - - msleep(2000); - - sony_get_toc(); -} - -/* - * 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 long retry_count; - - - while (handle_sony_cd_attention()); - /* Wait for the result data to be ready */ - retry_count = jiffies + SONY_JIFFIES_TIMEOUT; - while (time_before(jiffies, retry_count) - && (is_busy() || (!(is_result_ready())))) { - sony_sleep(); - - while (handle_sony_cd_attention()); - } - if (is_busy() || (!(is_result_ready()))) { - pr_debug(PFX "timeout out %d\n", __LINE__); - 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()) { - pr_debug(PFX "timeout out %d\n", - __LINE__); - 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()) { - pr_debug(PFX "timeout out %d\n", - __LINE__); - 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 long retry_count; - int num_retries = 0; - -retry_cd_operation: - - while (handle_sony_cd_attention()); - - retry_count = jiffies + SONY_JIFFIES_TIMEOUT; - while (time_before(jiffies, retry_count) && (is_busy())) { - sony_sleep(); - - while (handle_sony_cd_attention()); - } - if (is_busy()) { - pr_debug(PFX "timeout out %d\n", __LINE__); - 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++; - msleep(100); - goto retry_cd_operation; - } -} - - -/* - * 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 0 - pr_debug(PFX "Entering %s\n", __FUNCTION__); -#endif - if (is_attention()) { - if (num_consecutive_attentions > - CDU31A_MAX_CONSECUTIVE_ATTENTIONS) { - printk(KERN_NOTICE PFX "Too many consecutive " - "attentions: %d\n", num_consecutive_attentions); - num_consecutive_attentions = 0; - pr_debug(PFX "Leaving %s at %d\n", __FUNCTION__, - __LINE__); - 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: - if (is_auto_eject) { - 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++; - pr_debug(PFX "Leaving %s at %d\n", __FUNCTION__, __LINE__); - return 1; - } else 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; - pr_debug(PFX "Leaving %s at %d\n", __FUNCTION__, __LINE__); - return 1; - } - - num_consecutive_attentions = 0; -#if 0 - pr_debug(PFX "Leaving %s at %d\n", __FUNCTION__, __LINE__); -#endif - 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 = msf[2]; - log += msf[1] * 75; - log += 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 output 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) -{ - unsigned char params[6]; - unsigned long retry_count; - - - pr_debug(PFX "Entering %s\n", __FUNCTION__); - log_to_msf(sector, params); - size_to_buf(nsect, ¶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 (time_before(jiffies, retry_count) && (is_busy())) { - sony_sleep(); - - while (handle_sony_cd_attention()); - } - - if (is_busy()) { - printk(KERN_NOTICE PFX "Timeout while waiting " - "to issue command\n"); - pr_debug(PFX "Leaving %s at %d\n", __FUNCTION__, __LINE__); - 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 = nsect * 4; - sony_next_block = sector * 4; - pr_debug(PFX "Leaving %s at %d\n", __FUNCTION__, __LINE__); - return 0; - } - pr_debug(PFX "Leaving %s at %d\n", __FUNCTION__, __LINE__); -} - -/* Abort a pending read operation. Clear all the drive status 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(KERN_ERR PFX "Aborting read, %s error\n", - translate_error(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; -} - -/* Called when the timer times out. This will abort the - pending read operation. */ -static void handle_abort_timeout(unsigned long data) -{ - pr_debug(PFX "Entering %s\n", __FUNCTION__); - /* If it is in use, ignore it. */ - if (down_trylock(&sony_sem) == 0) { - /* 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; - abort_read_started = 1; - up(&sony_sem); - } - pr_debug(PFX "Leaving %s\n", __FUNCTION__); -} - -/* Actually get one sector of data from the drive. */ -static void -input_data_sector(char *buffer) -{ - pr_debug(PFX "Entering %s\n", __FUNCTION__); - - /* If an XA disk on a CDU31A, skip the first 12 bytes of data from - the disk. The real data is after that. We can use audio_buffer. */ - if (sony_xa_mode) - insb(sony_cd_read_reg, audio_buffer, CD_XA_HEAD); - - clear_data_ready(); - - insb(sony_cd_read_reg, buffer, 2048); - - /* If an XA disk, we have to clear out the rest of the unused - error correction data. We can use audio_buffer for that. */ - if (sony_xa_mode) - insb(sony_cd_read_reg, audio_buffer, CD_XA_TAIL); - - pr_debug(PFX "Leaving %s\n", __FUNCTION__); -} - -/* 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 long retry_count; - - pr_debug(PFX "Entering %s\n", __FUNCTION__); - - res_reg[0] = 0; < |