cm206.c
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- /* cm206.c. A linux-driver for the cm206 cdrom player with cm260 adapter card.
- Copyright (c) 1995--1997 David A. van Leeuwen.
- $Id: cm206.c,v 1.5 1997/12/26 11:02:51 david Exp $
-
- 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.
- History:
- Started 25 jan 1994. Waiting for documentation...
- 22 feb 1995: 0.1a first reasonably safe polling driver.
- Two major bugs, one in read_sector and one in
- do_cm206_request, happened to cancel!
- 25 feb 1995: 0.2a first reasonable interrupt driven version of above.
- uart writes are still done in polling mode.
- 25 feb 1995: 0.21a writes also in interrupt mode, still some
- small bugs to be found... Larger buffer.
- 2 mrt 1995: 0.22 Bug found (cd-> nowhere, interrupt was called in
- initialization), read_ahead of 16. Timeouts implemented.
- unclear if they do something...
- 7 mrt 1995: 0.23 Start of background read-ahead.
- 18 mrt 1995: 0.24 Working background read-ahead. (still problems)
- 26 mrt 1995: 0.25 Multi-session ioctl added (kernel v1.2).
- Statistics implemented, though separate stats206.h.
- Accessible trough ioctl 0x1000 (just a number).
- Hard to choose between v1.2 development and 1.1.75.
- Bottom-half doesn't work with 1.2...
- 0.25a: fixed... typo. Still problems...
- 1 apr 1995: 0.26 Module support added. Most bugs found. Use kernel 1.2.n.
- 5 apr 1995: 0.27 Auto-probe for the adapter card base address.
- Auto-probe for the adaptor card irq line.
- 7 apr 1995: 0.28 Added lilo setup support for base address and irq.
- Use major number 32 (not in this source), officially
- assigned to this driver.
- 9 apr 1995: 0.29 Added very limited audio support. Toc_header, stop, pause,
- resume, eject. Play_track ignores track info, because we can't
- read a table-of-contents entry. Toc_entry is implemented
- as a `placebo' function: always returns start of disc.
- 3 may 1995: 0.30 Audio support completed. The get_toc_entry function
- is implemented as a binary search.
- 15 may 1995: 0.31 More work on audio stuff. Workman is not easy to
- satisfy; changed binary search into linear search.
- Auto-probe for base address somewhat relaxed.
- 1 jun 1995: 0.32 Removed probe_irq_on/off for module version.
- 10 jun 1995: 0.33 Workman still behaves funny, but you should be
- able to eject and substitute another disc.
- An adaptation of 0.33 is included in linux-1.3.7 by Eberhard Moenkeberg
- 18 jul 1995: 0.34 Patch by Heiko Eissfeldt included, mainly considering
- verify_area's in the ioctls. Some bugs introduced by
- EM considering the base port and irq fixed.
- 18 dec 1995: 0.35 Add some code for error checking... no luck...
- We jump to reach our goal: version 1.0 in the next stable linux kernel.
- 19 mar 1996: 0.95 Different implementation of CDROM_GET_UPC, on
- request of Thomas Quinot.
- 25 mar 1996: 0.96 Interpretation of opening with O_WRONLY or O_RDWR:
- open only for ioctl operation, e.g., for operation of
- tray etc.
- 4 apr 1996: 0.97 First implementation of layer between VFS and cdrom
- driver, a generic interface. Much of the functionality
- of cm206_open() and cm206_ioctl() is transferred to a
- new file cdrom.c and its header ucdrom.h.
- Upgrade to Linux kernel 1.3.78.
- 11 apr 1996 0.98 Upgrade to Linux kernel 1.3.85
- More code moved to cdrom.c
-
- 0.99 Some more small changes to decrease number
- of oopses at module load;
-
- 27 jul 1996 0.100 Many hours of debugging, kernel change from 1.2.13
- to 2.0.7 seems to have introduced some weird behavior
- in (interruptible_)sleep_on(&cd->data): the process
- seems to be woken without any explicit wake_up in my own
- code. Patch to try 100x in case such untriggered wake_up's
- occur.
- 28 jul 1996 0.101 Rewriting of the code that receives the command echo,
- using a fifo to store echoed bytes.
- Branch from 0.99:
-
- 0.99.1.0 Update to kernel release 2.0.10 dev_t -> kdev_t
- (emoenke) various typos found by others. extra
- module-load oops protection.
-
- 0.99.1.1 Initialization constant cdrom_dops.speed
- changed from float (2.0) to int (2); Cli()-sti() pair
- around cm260_reset() in module initialization code.
-
- 0.99.1.2 Changes literally as proposed by Scott Snyder
- <snyder@d0sgif.fnal.gov> for the 2.1 kernel line, which
- have to do mainly with the poor minor support i had. The
- major new concept is to change a cdrom driver's
- operations struct from the capabilities struct. This
- reflects the fact that there is one major for a driver,
- whilst there can be many minors whith completely
- different capabilities.
- 0.99.1.3 More changes for operations/info separation.
- 0.99.1.4 Added speed selection (someone had to do this
- first).
- 23 jan 1997 0.99.1.5 MODULE_PARMS call added.
- 23 jan 1997 0.100.1.2--0.100.1.5 following similar lines as
- 0.99.1.1--0.99.1.5. I get too many complaints about the
- drive making read errors. What't wrong with the 2.0+
- kernel line? Why get i (and othe cm206 owners) weird
- results? Why were things good in the good old 1.1--1.2
- era? Why don't i throw away the drive?
- 2 feb 1997 0.102 Added `volatile' to values in cm206_struct. Seems to
- reduce many of the problems. Rewrote polling routines
- to use fixed delays between polls.
- 0.103 Changed printk behavior.
- 0.104 Added a 0.100 -> 0.100.1.1 change
- 11 feb 1997 0.105 Allow auto_probe during module load, disable
- with module option "auto_probe=0". Moved some debugging
- statements to lower priority. Implemented select_speed()
- function.
- 13 feb 1997 1.0 Final version for 2.0 kernel line.
- All following changes will be for the 2.1 kernel line.
- 15 feb 1997 1.1 Keep up with kernel 2.1.26, merge in changes from
- cdrom.c 0.100.1.1--1.0. Add some more MODULE_PARMS.
- 14 sep 1997 1.2 Upgrade to Linux 2.1.55. Added blksize_size[], patch
- sent by James Bottomley <James.Bottomley@columbiasc.ncr.com>.
- 21 dec 1997 1.4 Upgrade to Linux 2.1.72.
- 24 jan 1998 Removed the cm206_disc_status() function, as it was now dead
- code. The Uniform CDROM driver now provides this functionality.
-
- 9 Nov. 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>
- *
- * Parts of the code are based upon lmscd.c written by Kai Petzke,
- * sbpcd.c written by Eberhard Moenkeberg, and mcd.c by Martin
- * Harriss, but any off-the-shelf dynamic programming algorithm won't
- * be able to find them.
- *
- * The cm206 drive interface and the cm260 adapter card seem to be
- * sufficiently different from their cm205/cm250 counterparts
- * in order to write a complete new driver.
- *
- * I call all routines connected to the Linux kernel something
- * with `cm206' in it, as this stuff is too series-dependent.
- *
- * Currently, my limited knowledge is based on:
- * - The Linux Kernel Hacker's guide, v. 0.5, by Michael K. Johnson
- * - Linux Kernel Programmierung, by Michael Beck and others
- * - Philips/LMS cm206 and cm226 product specification
- * - Philips/LMS cm260 product specification
- *
- * David van Leeuwen, david@tm.tno.nl. */
- #define REVISION "$Revision: 1.5 $"
- #include <linux/module.h>
- #include <linux/errno.h> /* These include what we really need */
- #include <linux/delay.h>
- #include <linux/string.h>
- #include <linux/sched.h>
- #include <linux/interrupt.h>
- #include <linux/timer.h>
- #include <linux/cdrom.h>
- #include <linux/devfs_fs_kernel.h>
- #include <linux/ioport.h>
- #include <linux/mm.h>
- #include <linux/slab.h>
- #include <linux/init.h>
- /* #include <linux/ucdrom.h> */
- #include <asm/io.h>
- #define MAJOR_NR CM206_CDROM_MAJOR
- #include <linux/blk.h>
- #undef DEBUG
- #define STATISTICS /* record times and frequencies of events */
- #define AUTO_PROBE_MODULE
- #define USE_INSW
- #include "cm206.h"
- /* This variable defines whether or not to probe for adapter base port
- address and interrupt request. It can be overridden by the boot
- parameter `auto'.
- */
- static int auto_probe = 1; /* Yes, why not? */
- static int cm206_base = CM206_BASE;
- static int cm206_irq = CM206_IRQ;
- #ifdef MODULE
- static int cm206[2] = { 0, 0 }; /* for compatible `insmod' parameter passing */
- #endif
- MODULE_PARM(cm206_base, "i"); /* base */
- MODULE_PARM(cm206_irq, "i"); /* irq */
- MODULE_PARM(cm206, "1-2i"); /* base,irq or irq,base */
- MODULE_PARM(auto_probe, "i"); /* auto probe base and irq */
- MODULE_LICENSE("GPL");
- #define POLLOOP 100 /* milliseconds */
- #define READ_AHEAD 1 /* defines private buffer, waste! */
- #define BACK_AHEAD 1 /* defines adapter-read ahead */
- #define DATA_TIMEOUT (3*HZ) /* measured in jiffies (10 ms) */
- #define UART_TIMEOUT (5*HZ/100)
- #define DSB_TIMEOUT (7*HZ) /* time for the slowest command to finish */
- #define UR_SIZE 4 /* uart receive buffer fifo size */
- #define LINUX_BLOCK_SIZE 512 /* WHERE is this defined? */
- #define RAW_SECTOR_SIZE 2352 /* ok, is also defined in cdrom.h */
- #define ISO_SECTOR_SIZE 2048
- #define BLOCKS_ISO (ISO_SECTOR_SIZE/LINUX_BLOCK_SIZE) /* 4 */
- #define CD_SYNC_HEAD 16 /* CD_SYNC + CD_HEAD */
- #ifdef STATISTICS /* keep track of errors in counters */
- #define stats(i) { ++cd->stats[st_ ## i];
- cd->last_stat[st_ ## i] = cd->stat_counter++;
- }
- #else
- #define stats(i) (void) 0;
- #endif
- #define Debug(a) {printk (KERN_DEBUG); printk a;}
- #ifdef DEBUG
- #define debug(a) Debug(a)
- #else
- #define debug(a) (void) 0;
- #endif
- typedef unsigned char uch; /* 8-bits */
- typedef unsigned short ush; /* 16-bits */
- struct toc_struct { /* private copy of Table of Contents */
- uch track, fsm[3], q0;
- };
- static int cm206_blocksizes[1] = { 2048 };
- struct cm206_struct {
- volatile ush intr_ds; /* data status read on last interrupt */
- volatile ush intr_ls; /* uart line status read on last interrupt */
- volatile uch ur[UR_SIZE]; /* uart receive buffer fifo */
- volatile uch ur_w, ur_r; /* write/read buffer index */
- volatile uch dsb, cc; /* drive status byte and condition (error) code */
- int command; /* command to be written to the uart */
- int openfiles;
- ush sector[READ_AHEAD * RAW_SECTOR_SIZE / 2]; /* buffered cd-sector */
- int sector_first, sector_last; /* range of these sectors */
- wait_queue_head_t uart; /* wait queues for interrupt */
- wait_queue_head_t data;
- struct timer_list timer; /* time-out */
- char timed_out;
- signed char max_sectors; /* number of sectors that fit in adapter mem */
- char wait_back; /* we're waiting for a background-read */
- char background; /* is a read going on in the background? */
- int adapter_first; /* if so, that's the starting sector */
- int adapter_last;
- char fifo_overflowed;
- uch disc_status[7]; /* result of get_disc_status command */
- #ifdef STATISTICS
- int stats[NR_STATS];
- int last_stat[NR_STATS]; /* `time' at which stat was stat */
- int stat_counter;
- #endif
- struct toc_struct toc[101]; /* The whole table of contents + lead-out */
- uch q[10]; /* Last read q-channel info */
- uch audio_status[5]; /* last read position on pause */
- uch media_changed; /* record if media changed */
- };
- #define DISC_STATUS cd->disc_status[0]
- #define FIRST_TRACK cd->disc_status[1]
- #define LAST_TRACK cd->disc_status[2]
- #define PAUSED cd->audio_status[0] /* misuse this memory byte! */
- #define PLAY_TO cd->toc[0] /* toc[0] records end-time in play */
- static struct cm206_struct *cd; /* the main memory structure */
- /* First, we define some polling functions. These are actually
- only being used in the initialization. */
- void send_command_polled(int command)
- {
- int loop = POLLOOP;
- while (!(inw(r_line_status) & ls_transmitter_buffer_empty)
- && loop > 0) {
- mdelay(1); /* one millisec delay */
- --loop;
- }
- outw(command, r_uart_transmit);
- }
- uch receive_echo_polled(void)
- {
- int loop = POLLOOP;
- while (!(inw(r_line_status) & ls_receive_buffer_full) && loop > 0) {
- mdelay(1);
- --loop;
- }
- return ((uch) inw(r_uart_receive));
- }
- uch send_receive_polled(int command)
- {
- send_command_polled(command);
- return receive_echo_polled();
- }
- inline void clear_ur(void)
- {
- if (cd->ur_r != cd->ur_w) {
- debug(("Deleting bytes from fifo:"));
- for (; cd->ur_r != cd->ur_w;
- cd->ur_r++, cd->ur_r %= UR_SIZE)
- debug((" 0x%x", cd->ur[cd->ur_r]));
- debug(("n"));
- }
- }
- /* The interrupt handler. When the cm260 generates an interrupt, very
- much care has to be taken in reading out the registers in the right
- order; in case of a receive_buffer_full interrupt, first the
- uart_receive must be read, and then the line status again to
- de-assert the interrupt line. It took me a couple of hours to find
- this out:-(
- The function reset_cm206 appears to cause an interrupt, because
- pulling up the INIT line clears both the uart-write-buffer /and/
- the uart-write-buffer-empty mask. We call this a `lost interrupt,'
- as there seems so reason for this to happen.
- */
- static void cm206_interrupt(int sig, void *dev_id, struct pt_regs *regs)
- /* you rang? */
- {
- volatile ush fool;
- cd->intr_ds = inw(r_data_status); /* resets data_ready, data_error,
- crc_error, sync_error, toc_ready
- interrupts */
- cd->intr_ls = inw(r_line_status); /* resets overrun bit */
- debug(("Intr, 0x%x 0x%x, %dn", cd->intr_ds, cd->intr_ls,
- cd->background));
- if (cd->intr_ls & ls_attention)
- stats(attention);
- /* receive buffer full? */
- if (cd->intr_ls & ls_receive_buffer_full) {
- cd->ur[cd->ur_w] = inb(r_uart_receive); /* get order right! */
- cd->intr_ls = inw(r_line_status); /* resets rbf interrupt */
- debug(("receiving #%d: 0x%xn", cd->ur_w,
- cd->ur[cd->ur_w]));
- cd->ur_w++;
- cd->ur_w %= UR_SIZE;
- if (cd->ur_w == cd->ur_r)
- debug(("cd->ur overflow!n"));
- if (waitqueue_active(&cd->uart) && cd->background < 2) {
- del_timer(&cd->timer);
- wake_up_interruptible(&cd->uart);
- }
- }
- /* data ready in fifo? */
- else if (cd->intr_ds & ds_data_ready) {
- if (cd->background)
- ++cd->adapter_last;
- if (waitqueue_active(&cd->data)
- && (cd->wait_back || !cd->background)) {
- del_timer(&cd->timer);
- wake_up_interruptible(&cd->data);
- }
- stats(data_ready);
- }
- /* ready to issue a write command? */
- else if (cd->command && cd->intr_ls & ls_transmitter_buffer_empty) {
- outw(dc_normal | (inw(r_data_status) & 0x7f),
- r_data_control);
- outw(cd->command, r_uart_transmit);
- cd->command = 0;
- if (!cd->background)
- wake_up_interruptible(&cd->uart);
- }
- /* now treat errors (at least, identify them for debugging) */
- else if (cd->intr_ds & ds_fifo_overflow) {
- debug(("Fifo overflow at sectors 0x%xn",
- cd->sector_first));
- fool = inw(r_fifo_output_buffer); /* de-assert the interrupt */
- cd->fifo_overflowed = 1; /* signal one word less should be read */
- stats(fifo_overflow);
- } else if (cd->intr_ds & ds_data_error) {
- debug(("Data error at sector 0x%xn", cd->sector_first));
- stats(data_error);
- } else if (cd->intr_ds & ds_crc_error) {
- debug(("CRC error at sector 0x%xn", cd->sector_first));
- stats(crc_error);
- } else if (cd->intr_ds & ds_sync_error) {
- debug(("Sync at sector 0x%xn", cd->sector_first));
- stats(sync_error);
- } else if (cd->intr_ds & ds_toc_ready) {
- /* do something appropriate */
- }
- /* couldn't see why this interrupt, maybe due to init */
- else {
- outw(dc_normal | READ_AHEAD, r_data_control);
- stats(lost_intr);
- }
- if (cd->background
- && (cd->adapter_last - cd->adapter_first == cd->max_sectors
- || cd->fifo_overflowed))
- mark_bh(CM206_BH); /* issue a stop read command */
- stats(interrupt);
- }
- /* we have put the address of the wait queue in who */
- void cm206_timeout(unsigned long who)
- {
- cd->timed_out = 1;
- debug(("Timing outn"));
- wake_up_interruptible((wait_queue_head_t *) who);
- }
- /* This function returns 1 if a timeout occurred, 0 if an interrupt
- happened */
- int sleep_or_timeout(wait_queue_head_t * wait, int timeout)
- {
- cd->timed_out = 0;
- cd->timer.data = (unsigned long) wait;
- cd->timer.expires = jiffies + timeout;
- add_timer(&cd->timer);
- debug(("going to sleepn"));
- interruptible_sleep_on(wait);
- del_timer(&cd->timer);
- if (cd->timed_out) {
- cd->timed_out = 0;
- return 1;
- } else
- return 0;
- }
- void cm206_delay(int nr_jiffies)
- {
- DECLARE_WAIT_QUEUE_HEAD(wait);
- sleep_or_timeout(&wait, nr_jiffies);
- }
- void send_command(int command)
- {
- debug(("Sending 0x%xn", command));
- if (!(inw(r_line_status) & ls_transmitter_buffer_empty)) {
- cd->command = command;
- cli(); /* don't interrupt before sleep */
- outw(dc_mask_sync_error | dc_no_stop_on_error |
- (inw(r_data_status) & 0x7f), r_data_control);
- /* interrupt routine sends command */
- if (sleep_or_timeout(&cd->uart, UART_TIMEOUT)) {
- debug(("Time out on write-buffern"));
- stats(write_timeout);
- outw(command, r_uart_transmit);
- }
- debug(("Write commmand delayedn"));
- } else
- outw(command, r_uart_transmit);
- }
- uch receive_byte(int timeout)
- {
- uch ret;
- cli();
- debug(("clin"));
- ret = cd->ur[cd->ur_r];
- if (cd->ur_r != cd->ur_w) {
- sti();
- debug(("returning #%d: 0x%xn", cd->ur_r,
- cd->ur[cd->ur_r]));
- cd->ur_r++;
- cd->ur_r %= UR_SIZE;
- return ret;
- } else if (sleep_or_timeout(&cd->uart, timeout)) { /* does sti() */
- debug(("Time out on receive-buffern"));
- #ifdef STATISTICS
- if (timeout == UART_TIMEOUT)
- stats(receive_timeout) /* no `;'! */
- else
- stats(dsb_timeout);
- #endif
- return 0xda;
- }
- ret = cd->ur[cd->ur_r];
- debug(("slept; returning #%d: 0x%xn", cd->ur_r,
- cd->ur[cd->ur_r]));
- cd->ur_r++;
- cd->ur_r %= UR_SIZE;
- return ret;
- }
- inline uch receive_echo(void)
- {
- return receive_byte(UART_TIMEOUT);
- }
- inline uch send_receive(int command)
- {
- send_command(command);
- return receive_echo();
- }
- inline uch wait_dsb(void)
- {
- return receive_byte(DSB_TIMEOUT);
- }
- int type_0_command(int command, int expect_dsb)
- {
- int e;
- clear_ur();
- if (command != (e = send_receive(command))) {
- debug(("command 0x%x echoed as 0x%xn", command, e));
- stats(echo);
- return -1;
- }
- if (expect_dsb) {
- cd->dsb = wait_dsb(); /* wait for command to finish */
- }
- return 0;
- }
- int type_1_command(int command, int bytes, uch * status)
- { /* returns info */
- int i;
- if (type_0_command(command, 0))
- return -1;
- for (i = 0; i < bytes; i++)
- status[i] = send_receive(c_gimme);
- return 0;
- }
- /* This function resets the adapter card. We'd better not do this too
- * often, because it tends to generate `lost interrupts.' */
- void reset_cm260(void)
- {
- outw(dc_normal | dc_initialize | READ_AHEAD, r_data_control);
- udelay(10); /* 3.3 mu sec minimum */
- outw(dc_normal | READ_AHEAD, r_data_control);
- }
- /* fsm: frame-sec-min from linear address; one of many */
- void fsm(int lba, uch * fsm)
- {
- fsm[0] = lba % 75;
- lba /= 75;
- lba += 2;
- fsm[1] = lba % 60;
- fsm[2] = lba / 60;
- }
- inline int fsm2lba(uch * fsm)
- {
- return fsm[0] + 75 * (fsm[1] - 2 + 60 * fsm[2]);
- }
- inline int f_s_m2lba(uch f, uch s, uch m)
- {
- return f + 75 * (s - 2 + 60 * m);
- }
- int start_read(int start)
- {
- uch read_sector[4] = { c_read_data, };
- int i, e;
- fsm(start, &read_sector[1]);
- clear_ur();
- for (i = 0; i < 4; i++)
- if (read_sector[i] != (e = send_receive(read_sector[i]))) {
- debug(("read_sector: %x echoes %xn",
- read_sector[i], e));
- stats(echo);
- if (e == 0xff) { /* this seems to happen often */
- e = receive_echo();
- debug(("Second try %xn", e));
- if (e != read_sector[i])
- return -1;
- }
- }
- return 0;
- }
- int stop_read(void)
- {
- int e;
- type_0_command(c_stop, 0);
- if ((e = receive_echo()) != 0xff) {
- debug(("c_stop didn't send 0xff, but 0x%xn", e));
- stats(stop_0xff);
- return -1;
- }
- return 0;
- }
- /* This function starts to read sectors in adapter memory, the
- interrupt routine should stop the read. In fact, the bottom_half
- routine takes care of this. Set a flag `background' in the cd
- struct to indicate the process. */
- int read_background(int start, int reading)
- {
- if (cd->background)
- return -1; /* can't do twice */
- outw(dc_normal | BACK_AHEAD, r_data_control);
- if (!reading && start_read(start))
- return -2;
- cd->adapter_first = cd->adapter_last = start;
- cd->background = 1; /* flag a read is going on */
- return 0;
- }
- #ifdef USE_INSW
- #define transport_data insw
- #else
- /* this routine implements insw(,,). There was a time i had the
- impression that there would be any difference in error-behaviour. */
- void transport_data(int port, ush * dest, int count)
- {
- int i;
- ush *d;
- for (i = 0, d = dest; i < count; i++, d++)
- *d = inw(port);
- }
- #endif
- #define MAX_TRIES 100
- int read_sector(int start)
- {
- int tries = 0;
- if (cd->background) {
- cd->background = 0;
- cd->adapter_last = -1; /* invalidate adapter memory */
- stop_read();
- }
- cd->fifo_overflowed = 0;
- reset_cm260(); /* empty fifo etc. */
- if (start_read(start))
- return -1;
- do {
- if (sleep_or_timeout(&cd->data, DATA_TIMEOUT)) {
- debug(("Read timed out sector 0x%xn", start));
- stats(read_timeout);
- stop_read();
- return -3;
- }
- tries++;
- } while (cd->intr_ds & ds_fifo_empty && tries < MAX_TRIES);
- if (tries > 1)
- debug(("Took me some triesn"))
- else
- if (tries == MAX_TRIES)
- debug(("MAX_TRIES tries for read sectorn"));
- transport_data(r_fifo_output_buffer, cd->sector,
- READ_AHEAD * RAW_SECTOR_SIZE / 2);
- if (read_background(start + READ_AHEAD, 1))
- stats(read_background);
- cd->sector_first = start;
- cd->sector_last = start + READ_AHEAD;
- stats(read_restarted);
- return 0;
- }
- /* The function of bottom-half is to send a stop command to the drive
- This isn't easy because the routine is not `owned' by any process;
- we can't go to sleep! The variable cd->background gives the status:
- 0 no read pending
- 1 a read is pending
- 2 c_stop waits for write_buffer_empty
- 3 c_stop waits for receive_buffer_full: echo
- 4 c_stop waits for receive_buffer_full: 0xff
- */
- void cm206_bh(void)
- {
- debug(("bh: %dn", cd->background));
- switch (cd->background) {
- case 1:
- stats(bh);
- if (!(cd->intr_ls & ls_transmitter_buffer_empty)) {
- cd->command = c_stop;
- outw(dc_mask_sync_error | dc_no_stop_on_error |
- (inw(r_data_status) & 0x7f), r_data_control);
- cd->background = 2;
- break; /* we'd better not time-out here! */
- } else
- outw(c_stop, r_uart_transmit);
- /* fall into case 2: */
- case 2:
- /* the write has been satisfied by interrupt routine */
- cd->background = 3;
- break;
- case 3:
- if (cd->ur_r != cd->ur_w) {
- if (cd->ur[cd->ur_r] != c_stop) {
- debug(("cm206_bh: c_stop echoed 0x%xn",
- cd->ur[cd->ur_r]));
- stats(echo);
- }
- cd->ur_r++;
- cd->ur_r %= UR_SIZE;
- }
- cd->background++;
- break;
- case 4:
- if (cd->ur_r != cd->ur_w) {
- if (cd->ur[cd->ur_r] != 0xff) {
- debug(("cm206_bh: c_stop reacted with 0x%xn", cd->ur[cd->ur_r]));
- stats(stop_0xff);
- }
- cd->ur_r++;
- cd->ur_r %= UR_SIZE;
- }
- cd->background = 0;
- }
- }
- /* This command clears the dsb_possible_media_change flag, so we must
- * retain it.
- */
- void get_drive_status(void)
- {
- uch status[2];
- type_1_command(c_drive_status, 2, status); /* this might be done faster */
- cd->dsb = status[0];
- cd->cc = status[1];
- cd->media_changed |=
- !!(cd->dsb & (dsb_possible_media_change |
- dsb_drive_not_ready | dsb_tray_not_closed));
- }
- void get_disc_status(void)
- {
- if (type_1_command(c_disc_status, 7, cd->disc_status)) {
- debug(("get_disc_status: errorn"));
- }
- }
- struct block_device_operations cm206_bdops =
- {
- owner: THIS_MODULE,
- open: cdrom_open,
- release: cdrom_release,
- ioctl: cdrom_ioctl,
- check_media_change: cdrom_media_changed,
- };
- /* The new open. The real opening strategy is defined in cdrom.c. */
- static int cm206_open(struct cdrom_device_info *cdi, int purpose)
- {
- if (!cd->openfiles) { /* reset only first time */
- cd->background = 0;
- reset_cm260();
- cd->adapter_last = -1; /* invalidate adapter memory */
- cd->sector_last = -1;
- }
- ++cd->openfiles;
- stats(open);
- return 0;
- }
- static void cm206_release(struct cdrom_device_info *cdi)
- {
- if (cd->openfiles == 1) {
- if (cd->background) {
- cd->background = 0;
- stop_read();
- }
- cd->sector_last = -1; /* Make our internal buffer invalid */
- FIRST_TRACK = 0; /* No valid disc status */
- }
- --cd->openfiles;
- }
- /* Empty buffer empties $sectors$ sectors of the adapter card buffer,
- * and then reads a sector in kernel memory. */
- void empty_buffer(int sectors)
- {
- while (sectors >= 0) {
- transport_data(r_fifo_output_buffer,
- cd->sector + cd->fifo_overflowed,
- RAW_SECTOR_SIZE / 2 - cd->fifo_overflowed);
- --sectors;
- ++cd->adapter_first; /* update the current adapter sector */
- cd->fifo_overflowed = 0; /* reset overflow bit */
- stats(sector_transferred);
- }
- cd->sector_first = cd->adapter_first - 1;
- cd->sector_last = cd->adapter_first; /* update the buffer sector */
- }
- /* try_adapter. This function determines if the requested sector is
- in adapter memory, or will appear there soon. Returns 0 upon
- success */
- int try_adapter(int sector)
- {
- if (cd->adapter_first <= sector && sector < cd->adapter_last) {
- /* sector is in adapter memory */
- empty_buffer(sector - cd->adapter_first);
- return 0;
- } else if (cd->background == 1 && cd->adapter_first <= sector
- && sector < cd->adapter_first + cd->max_sectors) {
- /* a read is going on, we can wait for it */
- cd->wait_back = 1;
- while (sector >= cd->adapter_last) {
- if (sleep_or_timeout(&cd->data, DATA_TIMEOUT)) {
- debug(("Timed out during background wait: %d %d %d %dn", sector, cd->adapter_last, cd->adapter_first, cd->background));
- stats(back_read_timeout);
- cd->wait_back = 0;
- return -1;
- }
- }
- cd->wait_back = 0;
- empty_buffer(sector - cd->adapter_first);
- return 0;
- } else
- return -2;
- }
- /* This is not a very smart implementation. We could optimize for
- consecutive block numbers. I'm not convinced this would really
- bring down the processor load. */
- static void do_cm206_request(request_queue_t * q)
- {
- long int i, cd_sec_no;
- int quarter, error;
- uch *source, *dest;
- while (1) { /* repeat until all requests have been satisfied */
- INIT_REQUEST;
- if (QUEUE_EMPTY || CURRENT->rq_status == RQ_INACTIVE)
- return;
- if (CURRENT->cmd != READ) {
- debug(("Non-read command %d on cdromn",
- CURRENT->cmd));
- end_request(0);
- continue;
- }
- spin_unlock_irq(&io_request_lock);
- error = 0;
- for (i = 0; i < CURRENT->nr_sectors; i++) {
- int e1, e2;
- cd_sec_no = (CURRENT->sector + i) / BLOCKS_ISO; /* 4 times 512 bytes */
- quarter = (CURRENT->sector + i) % BLOCKS_ISO;
- dest = CURRENT->buffer + i * LINUX_BLOCK_SIZE;
- /* is already in buffer memory? */
- if (cd->sector_first <= cd_sec_no
- && cd_sec_no < cd->sector_last) {
- source =
- ((uch *) cd->sector) + 16 +
- quarter * LINUX_BLOCK_SIZE +
- (cd_sec_no -
- cd->sector_first) * RAW_SECTOR_SIZE;
- memcpy(dest, source, LINUX_BLOCK_SIZE);
- } else if (!(e1 = try_adapter(cd_sec_no)) ||
- !(e2 = read_sector(cd_sec_no))) {
- source =
- ((uch *) cd->sector) + 16 +
- quarter * LINUX_BLOCK_SIZE;
- memcpy(dest, source, LINUX_BLOCK_SIZE);
- } else {
- error = 1;
- debug(("cm206_request: %d %dn", e1, e2));
- }
- }
- spin_lock_irq(&io_request_lock);
- end_request(!error);
- }
- }
- /* Audio support. I've tried very hard, but the cm206 drive doesn't
- seem to have a get_toc (table-of-contents) function, while i'm
- pretty sure it must read the toc upon disc insertion. Therefore
- this function has been implemented through a binary search
- strategy. All track starts that happen to be found are stored in
- cd->toc[], for future use.
- I've spent a whole day on a bug that only shows under Workman---
- I don't get it. Tried everything, nothing works. If workman asks
- for track# 0xaa, it'll get the wrong time back. Any other program
- receives the correct value. I'm stymied.
- */
- /* seek seeks to address lba. It does wait to arrive there. */
- void seek(int lba)
- {
- int i;
- uch seek_command[4] = { c_seek, };
- fsm(lba, &seek_command[1]);
- for (i = 0; i < 4; i++)
- type_0_command(seek_command[i], 0);
- cd->dsb = wait_dsb();
- }
- uch bcdbin(unsigned char bcd)
- { /* stolen from mcd.c! */
- return (bcd >> 4) * 10 + (bcd & 0xf);
- }
- inline uch normalize_track(uch track)
- {
- if (track < 1)
- return 1;
- if (track > LAST_TRACK)
- return LAST_TRACK + 1;
- return track;
- }
- /* This function does a binary search for track start. It records all
- * tracks seen in the process. Input $track$ must be between 1 and
- * #-of-tracks+1. Note that the start of the disc must be in toc[1].fsm.
- */
- int get_toc_lba(uch track)
- {
- int max = 74 * 60 * 75 - 150, min = fsm2lba(cd->toc[1].fsm);
- int i, lba, l, old_lba = 0;
- uch *q = cd->q;
- uch ct; /* current track */
- int binary = 0;
- const int skip = 3 * 60 * 75; /* 3 minutes */
- for (i = track; i > 0; i--)
- if (cd->toc[i].track) {
- min = fsm2lba(cd->toc[i].fsm);
- break;
- }
- lba = min + skip;
- do {
- seek(lba);
- type_1_command(c_read_current_q, 10, q);
- ct = normalize_track(q[1]);
- if (!cd->toc[ct].track) {
- l = q[9] - bcdbin(q[5]) + 75 * (q[8] -
- bcdbin(q[4]) - 2 +
- 60 * (q[7] -
- bcdbin(q
- [3])));
- cd->toc[ct].track = q[1]; /* lead out still 0xaa */
- fsm(l, cd->toc[ct].fsm);
- cd->toc[ct].q0 = q[0]; /* contains adr and ctrl info */
- if (ct == track)
- return l;
- }
- old_lba = lba;
- if (binary) {
- if (ct < track)
- min = lba;
- else
- max = lba;
- lba = (min + max) / 2;
- } else {
- if (ct < track)
- lba += skip;
- else {
- binary = 1;
- max = lba;
- min = lba - skip;
- lba = (min + max) / 2;
- }
- }
- } while (lba != old_lba);
- return lba;
- }
- void update_toc_entry(uch track)
- {
- track = normalize_track(track);
- if (!cd->toc[track].track)
- get_toc_lba(track);
- }
- /* return 0 upon success */
- int read_toc_header(struct cdrom_tochdr *hp)
- {
- if (!FIRST_TRACK)
- get_disc_status();
- if (hp) {
- int i;
- hp->cdth_trk0 = FIRST_TRACK;
- hp->cdth_trk1 = LAST_TRACK;
- /* fill in first track position */
- for (i = 0; i < 3; i++)
- cd->toc[1].fsm[i] = cd->disc_status[3 + i];
- update_toc_entry(LAST_TRACK + 1); /* find most entries */
- return 0;
- }
- return -1;
- }
- void play_from_to_msf(struct cdrom_msf *msfp)
- {
- uch play_command[] = { c_play,
- msfp->cdmsf_frame0, msfp->cdmsf_sec0, msfp->cdmsf_min0,
- msfp->cdmsf_frame1, msfp->cdmsf_sec1, msfp->cdmsf_min1, 2,
- 2
- };
- int i;
- for (i = 0; i < 9; i++)
- type_0_command(play_command[i], 0);
- for (i = 0; i < 3; i++)
- PLAY_TO.fsm[i] = play_command[i + 4];
- PLAY_TO.track = 0; /* say no track end */
- cd->dsb = wait_dsb();
- }
- void play_from_to_track(int from, int to)
- {
- uch play_command[8] = { c_play, };
- int i;
- if (from == 0) { /* continue paused play */
- for (i = 0; i < 3; i++) {
- play_command[i + 1] = cd->audio_status[i + 2];
- play_command[i + 4] = PLAY_TO.fsm[i];
- }
- } else {
- update_toc_entry(from);
- update_toc_entry(to + 1);
- for (i = 0; i < 3; i++) {
- play_command[i + 1] = cd->toc[from].fsm[i];
- PLAY_TO.fsm[i] = play_command[i + 4] =
- cd->toc[to + 1].fsm[i];
- }
- PLAY_TO.track = to;
- }
- for (i = 0; i < 7; i++)
- type_0_command(play_command[i], 0);
- for (i = 0; i < 2; i++)
- type_0_command(0x2, 0); /* volume */
- cd->dsb = wait_dsb();
- }
- int get_current_q(struct cdrom_subchnl *qp)
- {
- int i;
- uch *q = cd->q;
- if (type_1_command(c_read_current_q, 10, q))
- return 0;
- /* q[0] = bcdbin(q[0]); Don't think so! */
- for (i = 2; i < 6; i++)
- q[i] = bcdbin(q[i]);
- qp->cdsc_adr = q[0] & 0xf;
- qp->cdsc_ctrl = q[0] >> 4; /* from mcd.c */
- qp->cdsc_trk = q[1];
- qp->cdsc_ind = q[2];
- if (qp->cdsc_format == CDROM_MSF) {
- qp->cdsc_reladdr.msf.minute = q[3];
- qp->cdsc_reladdr.msf.second = q[4];
- qp->cdsc_reladdr.msf.frame = q[5];
- qp->cdsc_absaddr.msf.minute = q[7];
- qp->cdsc_absaddr.msf.second = q[8];
- qp->cdsc_absaddr.msf.frame = q[9];
- } else {
- qp->cdsc_reladdr.lba = f_s_m2lba(q[5], q[4], q[3]);
- qp->cdsc_absaddr.lba = f_s_m2lba(q[9], q[8], q[7]);
- }
- get_drive_status();
- if (cd->dsb & dsb_play_in_progress)
- qp->cdsc_audiostatus = CDROM_AUDIO_PLAY;
- else if (PAUSED)
- qp->cdsc_audiostatus = CDROM_AUDIO_PAUSED;
- else
- qp->cdsc_audiostatus = CDROM_AUDIO_NO_STATUS;
- return 0;
- }
- void invalidate_toc(void)
- {
- memset(cd->toc, 0, sizeof(cd->toc));
- memset(cd->disc_status, 0, sizeof(cd->disc_status));
- }
- /* cdrom.c guarantees that cdte_format == CDROM_MSF */
- void get_toc_entry(struct cdrom_tocentry *ep)
- {
- uch track = normalize_track(ep->cdte_track);
- update_toc_entry(track);
- ep->cdte_addr.msf.frame = cd->toc[track].fsm[0];
- ep->cdte_addr.msf.second = cd->toc[track].fsm[1];
- ep->cdte_addr.msf.minute = cd->toc[track].fsm[2];
- ep->cdte_adr = cd->toc[track].q0 & 0xf;
- ep->cdte_ctrl = cd->toc[track].q0 >> 4;
- ep->cdte_datamode = 0;
- }
- /* Audio ioctl. Ioctl commands connected to audio are in such an
- * idiosyncratic i/o format, that we leave these untouched. Return 0
- * upon success. Memory checking has been done by cdrom_ioctl(), the
- * calling function, as well as LBA/MSF sanitization.
- */
- int cm206_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
- void *arg)
- {
- switch (cmd) {
- case CDROMREADTOCHDR:
- return read_toc_header((struct cdrom_tochdr *) arg);
- case CDROMREADTOCENTRY:
- get_toc_entry((struct cdrom_tocentry *) arg);
- return 0;
- case CDROMPLAYMSF:
- play_from_to_msf((struct cdrom_msf *) arg);
- return 0;
- case CDROMPLAYTRKIND: /* admittedly, not particularly beautiful */
- play_from_to_track(((struct cdrom_ti *) arg)->cdti_trk0,
- ((struct cdrom_ti *) arg)->cdti_trk1);
- return 0;
- case CDROMSTOP:
- PAUSED = 0;
- if (cd->dsb & dsb_play_in_progress)
- return type_0_command(c_stop, 1);
- else
- return 0;
- case CDROMPAUSE:
- get_drive_status();
- if (cd->dsb & dsb_play_in_progress) {
- type_0_command(c_stop, 1);
- type_1_command(c_audio_status, 5,
- cd->audio_status);
- PAUSED = 1; /* say we're paused */
- }
- return 0;
- case CDROMRESUME:
- if (PAUSED)
- play_from_to_track(0, 0);
- PAUSED = 0;
- return 0;
- case CDROMSTART:
- case CDROMVOLCTRL:
- return 0;
- case CDROMSUBCHNL:
- return get_current_q((struct cdrom_subchnl *) arg);
- default:
- return -EINVAL;
- }
- }
- /* Ioctl. These ioctls are specific to the cm206 driver. I have made
- some driver statistics accessible through ioctl calls.
- */
- static int cm206_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
- unsigned long arg)
- {
- switch (cmd) {
- #ifdef STATISTICS
- case CM206CTL_GET_STAT:
- if (arg >= NR_STATS)
- return -EINVAL;
- else
- return cd->stats[arg];
- case CM206CTL_GET_LAST_STAT:
- if (arg >= NR_STATS)
- return -EINVAL;
- else
- return cd->last_stat[arg];
- #endif
- default:
- debug(("Unknown ioctl call 0x%xn", cmd));
- return -EINVAL;
- }
- }
- int cm206_media_changed(struct cdrom_device_info *cdi, int disc_nr)
- {
- if (cd != NULL) {
- int r;
- get_drive_status(); /* ensure cd->media_changed OK */
- r = cd->media_changed;
- cd->media_changed = 0; /* clear bit */
- return r;
- } else
- return -EIO;
- }
- /* The new generic cdrom support. Routines should be concise, most of
- the logic should be in cdrom.c */
- /* returns number of times device is in use */
- int cm206_open_files(struct cdrom_device_info *cdi)
- {
- if (cd)
- return cd->openfiles;
- return -1;
- }
- /* controls tray movement */
- int cm206_tray_move(struct cdrom_device_info *cdi, int position)
- {
- if (position) { /* 1: eject */
- type_0_command(c_open_tray, 1);
- invalidate_toc();
- } else
- type_0_command(c_close_tray, 1); /* 0: close */
- return 0;
- }
- /* gives current state of the drive */
- int cm206_drive_status(struct cdrom_device_info *cdi, int slot_nr)
- {
- get_drive_status();
- if (cd->dsb & dsb_tray_not_closed)
- return CDS_TRAY_OPEN;
- if (!(cd->dsb & dsb_disc_present))
- return CDS_NO_DISC;
- if (cd->dsb & dsb_drive_not_ready)
- return CDS_DRIVE_NOT_READY;
- return CDS_DISC_OK;
- }
- /* locks or unlocks door lock==1: lock; return 0 upon success */
- int cm206_lock_door(struct cdrom_device_info *cdi, int lock)
- {
- uch command = (lock) ? c_lock_tray : c_unlock_tray;
- type_0_command(command, 1); /* wait and get dsb */
- /* the logic calculates the success, 0 means successful */
- return lock ^ ((cd->dsb & dsb_tray_locked) != 0);
- }
- /* Although a session start should be in LBA format, we return it in
- MSF format because it is slightly easier, and the new generic ioctl
- will take care of the necessary conversion. */
- int cm206_get_last_session(struct cdrom_device_info *cdi,
- struct cdrom_multisession *mssp)
- {
- if (!FIRST_TRACK)
- get_disc_status();
- if (mssp != NULL) {
- if (DISC_STATUS & cds_multi_session) { /* multi-session */
- mssp->addr.msf.frame = cd->disc_status[3];
- mssp->addr.msf.second = cd->disc_status[4];
- mssp->addr.msf.minute = cd->disc_status[5];
- mssp->addr_format = CDROM_MSF;
- mssp->xa_flag = 1;
- } else {
- mssp->xa_flag = 0;
- }
- return 1;
- }
- return 0;
- }
- int cm206_get_upc(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
- {
- uch upc[10];
- char *ret = mcn->medium_catalog_number;
- int i;
- if (type_1_command(c_read_upc, 10, upc))
- return -EIO;
- for (i = 0; i < 13; i++) {
- int w = i / 2 + 1, r = i % 2;
- if (r)
- ret[i] = 0x30 | (upc[w] & 0x0f);
- else
- ret[i] = 0x30 | ((upc[w] >> 4) & 0x0f);
- }
- ret[13] = ' ';
- return 0;
- }
- int cm206_reset(struct cdrom_device_info *cdi)
- {
- stop_read();
- reset_cm260();
- outw(dc_normal | dc_break | READ_AHEAD, r_data_control);
- mdelay(1); /* 750 musec minimum */
- outw(dc_normal | READ_AHEAD, r_data_control);
- cd->sector_last = -1; /* flag no data buffered */
- cd->adapter_last = -1;
- invalidate_toc();
- return 0;
- }
- int cm206_select_speed(struct cdrom_device_info *cdi, int speed)
- {
- int r;
- switch (speed) {
- case 0:
- r = type_0_command(c_auto_mode, 1);
- break;
- case 1:
- r = type_0_command(c_force_1x, 1);
- break;
- case 2:
- r = type_0_command(c_force_2x, 1);
- break;
- default:
- return -1;
- }
- if (r < 0)
- return r;
- else
- return 1;
- }
- static struct cdrom_device_ops cm206_dops = {
- open:cm206_open,
- release:cm206_release,
- drive_status:cm206_drive_status,
- media_changed:cm206_media_changed,
- tray_move:cm206_tray_move,
- lock_door:cm206_lock_door,
- select_speed:cm206_select_speed,
- get_last_session:cm206_get_last_session,
- get_mcn:cm206_get_upc,
- reset:cm206_reset,
- audio_ioctl:cm206_audio_ioctl,
- dev_ioctl:cm206_ioctl,
- capability:CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK |
- CDC_MULTI_SESSION | CDC_MEDIA_CHANGED |
- CDC_MCN | CDC_PLAY_AUDIO | CDC_SELECT_SPEED |
- CDC_IOCTLS | CDC_DRIVE_STATUS,
- n_minors:1,
- };
- static struct cdrom_device_info cm206_info = {
- ops:&cm206_dops,
- speed:2,
- capacity:1,
- name:"cm206",
- };
- /* This routine gets called during initialization if things go wrong,
- * can be used in cleanup_module as well. */
- static void cleanup(int level)
- {
- switch (level) {
- case 4:
- if (unregister_cdrom(&cm206_info)) {
- printk("Can't unregister cdrom cm206n");
- return;
- }
- if (devfs_unregister_blkdev(MAJOR_NR, "cm206")) {
- printk("Can't unregister major cm206n");
- return;
- }
- blk_cleanup_queue(BLK_DEFAULT_QUEUE(MAJOR_NR));
- case 3:
- free_irq(cm206_irq, NULL);
- case 2:
- case 1:
- kfree(cd);
- release_region(cm206_base, 16);
- default:;
- }
- }
- /* This function probes for the adapter card. It returns the base
- address if it has found the adapter card. One can specify a base
- port to probe specifically, or 0 which means span all possible
- bases.
- Linus says it is too dangerous to use writes for probing, so we
- stick with pure reads for a while. Hope that 8 possible ranges,
- check_region, 15 bits of one port and 6 of another make things
- likely enough to accept the region on the first hit...
- */
- int __init probe_base_port(int base)
- {
- int b = 0x300, e = 0x370; /* this is the range of start addresses */
- volatile int fool, i;
- if (base)
- b = e = base;
- for (base = b; base <= e; base += 0x10) {
- if (check_region(base, 0x10))
- continue;
- for (i = 0; i < 3; i++)
- fool = inw(base + 2); /* empty possibly uart_receive_buffer */
- if ((inw(base + 6) & 0xffef) != 0x0001 || /* line_status */
- (inw(base) & 0xad00) != 0) /* data status */
- continue;
- return (base);
- }
- return 0;
- }
- #if !defined(MODULE) || defined(AUTO_PROBE_MODULE)
- /* Probe for irq# nr. If nr==0, probe for all possible irq's. */
- int __init probe_irq(int nr)
- {
- int irqs, irq;
- outw(dc_normal | READ_AHEAD, r_data_control); /* disable irq-generation */
- sti();
- irqs = probe_irq_on();
- reset_cm260(); /* causes interrupt */
- udelay(100); /* wait for it */
- irq = probe_irq_off(irqs);
- outw(dc_normal | READ_AHEAD, r_data_control); /* services interrupt */
- if (nr && irq != nr && irq > 0)
- return 0; /* wrong interrupt happened */
- else
- return irq;
- }
- #endif
- int __init cm206_init(void)
- {
- uch e = 0;
- long int size = sizeof(struct cm206_struct);
- printk(KERN_INFO "cm206 cdrom driver " REVISION);
- cm206_base = probe_base_port(auto_probe ? 0 : cm206_base);
- if (!cm206_base) {
- printk(" can't find adapter!n");
- return -EIO;
- }
- printk(" adapter at 0x%x", cm206_base);
- request_region(cm206_base, 16, "cm206");
- cd = (struct cm206_struct *) kmalloc(size, GFP_KERNEL);
- if (!cd)
- return -EIO;
- /* Now we have found the adaptor card, try to reset it. As we have
- * found out earlier, this process generates an interrupt as well,
- * so we might just exploit that fact for irq probing! */
- #if !defined(MODULE) || defined(AUTO_PROBE_MODULE)
- cm206_irq = probe_irq(auto_probe ? 0 : cm206_irq);
- if (cm206_irq <= 0) {
- printk("can't find IRQ!n");
- cleanup(1);
- return -EIO;
- } else
- printk(" IRQ %d foundn", cm206_irq);
- #else
- cli();
- reset_cm260();
- /* Now, the problem here is that reset_cm260 can generate an
- interrupt. It seems that this can cause a kernel oops some time
- later. So we wait a while and `service' this interrupt. */
- mdelay(1);
- outw(dc_normal | READ_AHEAD, r_data_control);
- sti();
- printk(" using IRQ %dn", cm206_irq);
- #endif
- if (send_receive_polled(c_drive_configuration) !=
- c_drive_configuration) {
- printk(KERN_INFO " drive not theren");
- cleanup(1);
- return -EIO;
- }
- e = send_receive_polled(c_gimme);
- printk(KERN_INFO "Firmware revision %d", e & dcf_revision_code);
- if (e & dcf_transfer_rate)
- printk(" double");
- else
- printk(" single");
- printk(" speed drive");
- if (e & dcf_motorized_tray)
- printk(", motorized tray");
- if (request_irq(cm206_irq, cm206_interrupt, 0, "cm206", NULL)) {
- printk("nUnable to reserve IRQ---abortedn");
- cleanup(2);
- return -EIO;
- }
- printk(".n");
- if (devfs_register_blkdev(MAJOR_NR, "cm206", &cm206_bdops) != 0) {
- printk(KERN_INFO "Cannot register for major %d!n",
- MAJOR_NR);
- cleanup(3);
- return -EIO;
- }
- cm206_info.dev = MKDEV(MAJOR_NR, 0);
- if (register_cdrom(&cm206_info) != 0) {
- printk(KERN_INFO "Cannot register for cdrom %d!n",
- MAJOR_NR);
- cleanup(3);
- return -EIO;
- }
- devfs_plain_cdrom(&cm206_info, &cm206_bdops);
- blk_init_queue(BLK_DEFAULT_QUEUE(MAJOR_NR), DEVICE_REQUEST);
- blksize_size[MAJOR_NR] = cm206_blocksizes;
- read_ahead[MAJOR_NR] = 16; /* reads ahead what? */
- init_bh(CM206_BH, cm206_bh);
- memset(cd, 0, sizeof(*cd)); /* give'm some reasonable value */
- cd->sector_last = -1; /* flag no data buffered */
- cd->adapter_last = -1;
- cd->timer.function = cm206_timeout;
- cd->max_sectors = (inw(r_data_status) & ds_ram_size) ? 24 : 97;
- printk(KERN_INFO "%d kB adapter memory available, "
- " %ld bytes kernel memory used.n", cd->max_sectors * 2,
- size);
- return 0;
- }
- #ifdef MODULE
- static void __init parse_options(void)
- {
- int i;
- for (i = 0; i < 2; i++) {
- if (0x300 <= cm206[i] && i <= 0x370
- && cm206[i] % 0x10 == 0) {
- cm206_base = cm206[i];
- auto_probe = 0;
- } else if (3 <= cm206[i] && cm206[i] <= 15) {
- cm206_irq = cm206[i];
- auto_probe = 0;
- }
- }
- }
- int __cm206_init(void)
- {
- parse_options();
- #if !defined(AUTO_PROBE_MODULE)
- auto_probe = 0;
- #endif
- return cm206_init();
- }
- void __exit cm206_exit(void)
- {
- cleanup(4);
- printk(KERN_INFO "cm206 removedn");
- }
- module_init(__cm206_init);
- module_exit(cm206_exit);
- #else /* !MODULE */
- /* This setup function accepts either `auto' or numbers in the range
- * 3--11 (for irq) or 0x300--0x370 (for base port) or both. */
- static int __init cm206_setup(char *s)
- {
- int i, p[4];
- (void) get_options(s, ARRAY_SIZE(p), p);
- if (!strcmp(s, "auto"))
- auto_probe = 1;
- for (i = 1; i <= p[0]; i++) {
- if (0x300 <= p[i] && i <= 0x370 && p[i] % 0x10 == 0) {
- cm206_base = p[i];
- auto_probe = 0;
- } else if (3 <= p[i] && p[i] <= 15) {
- cm206_irq = p[i];
- auto_probe = 0;
- }
- }
- return 1;
- }
- __setup("cm206=", cm206_setup);
- #endif /* !MODULE */
- /*
- * Local variables:
- * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -pipe -fno-strength-reduce -m486 -DMODULE -DMODVERSIONS -include /usr/src/linux/include/linux/modversions.h -c -o cm206.o cm206.c"
- * End:
- */