Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/cdrom/cm206.c b/drivers/cdrom/cm206.c
new file mode 100644
index 0000000..da80b14
--- /dev/null
+++ b/drivers/cdrom/cm206.c
@@ -0,0 +1,1626 @@
+/* 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/blkdev.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;
+};
+
+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 */
+static struct request_queue *cm206_queue;
+static DEFINE_SPINLOCK(cm206_lock);
+
+/* 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"));
+ }
+}
+
+static struct tasklet_struct cm206_tasklet;
+
+/* 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 irqreturn_t cm206_interrupt(int sig, void *dev_id, struct pt_regs *regs)
+{
+ 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, %d\n", 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%x\n", 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%x\n",
+ 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%x\n", cd->sector_first));
+ stats(data_error);
+ } else if (cd->intr_ds & ds_crc_error) {
+ debug(("CRC error at sector 0x%x\n", cd->sector_first));
+ stats(crc_error);
+ } else if (cd->intr_ds & ds_sync_error) {
+ debug(("Sync at sector 0x%x\n", 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))
+ tasklet_schedule(&cm206_tasklet); /* issue a stop read command */
+ stats(interrupt);
+ return IRQ_HANDLED;
+}
+
+/* we have put the address of the wait queue in who */
+void cm206_timeout(unsigned long who)
+{
+ cd->timed_out = 1;
+ debug(("Timing out\n"));
+ 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;
+ init_timer(&cd->timer);
+ cd->timer.data = (unsigned long) wait;
+ cd->timer.expires = jiffies + timeout;
+ add_timer(&cd->timer);
+ debug(("going to sleep\n"));
+ 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%x\n", 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-buffer\n"));
+ stats(write_timeout);
+ outw(command, r_uart_transmit);
+ }
+ debug(("Write commmand delayed\n"));
+ } else
+ outw(command, r_uart_transmit);
+}
+
+uch receive_byte(int timeout)
+{
+ uch ret;
+ cli();
+ debug(("cli\n"));
+ ret = cd->ur[cd->ur_r];
+ if (cd->ur_r != cd->ur_w) {
+ sti();
+ debug(("returning #%d: 0x%x\n", 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-buffer\n"));
+#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%x\n", 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%x\n", 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 %x\n",
+ read_sector[i], e));
+ stats(echo);
+ if (e == 0xff) { /* this seems to happen often */
+ e = receive_echo();
+ debug(("Second try %x\n", 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%x\n", 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%x\n", 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 tries\n"))
+ else
+ if (tries == MAX_TRIES)
+ debug(("MAX_TRIES tries for read sector\n"));
+ 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
+*/
+
+static void cm206_tasklet_func(unsigned long ignore)
+{
+ debug(("bh: %d\n", 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%x\n",
+ 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%x\n", cd->ur[cd->ur_r]));
+ stats(stop_0xff);
+ }
+ cd->ur_r++;
+ cd->ur_r %= UR_SIZE;
+ }
+ cd->background = 0;
+ }
+}
+
+static DECLARE_TASKLET(cm206_tasklet, cm206_tasklet_func, 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: error\n"));
+ }
+}
+
+/* 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 %d\n", 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;
+ struct request *req;
+
+ while (1) { /* repeat until all requests have been satisfied */
+ req = elv_next_request(q);
+ if (!req)
+ return;
+
+ if (req->cmd != READ) {
+ debug(("Non-read command %d on cdrom\n", req->cmd));
+ end_request(req, 0);
+ continue;
+ }
+ spin_unlock_irq(q->queue_lock);
+ error = 0;
+ for (i = 0; i < req->nr_sectors; i++) {
+ int e1, e2;
+ cd_sec_no = (req->sector + i) / BLOCKS_ISO; /* 4 times 512 bytes */
+ quarter = (req->sector + i) % BLOCKS_ISO;
+ dest = req->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 %d\n", e1, e2));
+ }
+ }
+ spin_lock_irq(q->queue_lock);
+ end_request(req, !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%x\n", 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] = '\0';
+ 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",
+};
+
+static int cm206_block_open(struct inode *inode, struct file *file)
+{
+ return cdrom_open(&cm206_info, inode, file);
+}
+
+static int cm206_block_release(struct inode *inode, struct file *file)
+{
+ return cdrom_release(&cm206_info, file);
+}
+
+static int cm206_block_ioctl(struct inode *inode, struct file *file,
+ unsigned cmd, unsigned long arg)
+{
+ return cdrom_ioctl(file, &cm206_info, inode, cmd, arg);
+}
+
+static int cm206_block_media_changed(struct gendisk *disk)
+{
+ return cdrom_media_changed(&cm206_info);
+}
+
+static struct block_device_operations cm206_bdops =
+{
+ .owner = THIS_MODULE,
+ .open = cm206_block_open,
+ .release = cm206_block_release,
+ .ioctl = cm206_block_ioctl,
+ .media_changed = cm206_block_media_changed,
+};
+
+static struct gendisk *cm206_gendisk;
+
+/* 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,
+ request_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 (!request_region(base, 0x10,"cm206"))
+ 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 */
+ release_region(base,0x10);
+ 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);
+ struct gendisk *disk;
+
+ 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);
+ cd = (struct cm206_struct *) kmalloc(size, GFP_KERNEL);
+ if (!cd)
+ goto out_base;
+ /* 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");
+ goto out_probe;
+ } else
+ printk(" IRQ %d found\n", 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 %d\n", cm206_irq);
+#endif
+ if (send_receive_polled(c_drive_configuration) !=
+ c_drive_configuration) {
+ printk(KERN_INFO " drive not there\n");
+ goto out_probe;
+ }
+ 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---aborted\n");
+ goto out_probe;
+ }
+ printk(".\n");
+
+ if (register_blkdev(MAJOR_NR, "cm206"))
+ goto out_blkdev;
+
+ disk = alloc_disk(1);
+ if (!disk)
+ goto out_disk;
+ disk->major = MAJOR_NR;
+ disk->first_minor = 0;
+ sprintf(disk->disk_name, "cm206cd");
+ disk->fops = &cm206_bdops;
+ disk->flags = GENHD_FL_CD;
+ cm206_gendisk = disk;
+ if (register_cdrom(&cm206_info) != 0) {
+ printk(KERN_INFO "Cannot register for cdrom %d!\n", MAJOR_NR);
+ goto out_cdrom;
+ }
+ cm206_queue = blk_init_queue(do_cm206_request, &cm206_lock);
+ if (!cm206_queue)
+ goto out_queue;
+
+ blk_queue_hardsect_size(cm206_queue, 2048);
+ disk->queue = cm206_queue;
+ add_disk(disk);
+
+ memset(cd, 0, sizeof(*cd)); /* give'm some reasonable value */
+ cd->sector_last = -1; /* flag no data buffered */
+ cd->adapter_last = -1;
+ init_timer(&cd->timer);
+ 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;
+
+out_queue:
+ unregister_cdrom(&cm206_info);
+out_cdrom:
+ put_disk(disk);
+out_disk:
+ unregister_blkdev(MAJOR_NR, "cm206");
+out_blkdev:
+ free_irq(cm206_irq, NULL);
+out_probe:
+ kfree(cd);
+out_base:
+ release_region(cm206_base, 16);
+ return -EIO;
+}
+
+#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)
+{
+ del_gendisk(cm206_gendisk);
+ put_disk(cm206_gendisk);
+ if (unregister_cdrom(&cm206_info)) {
+ printk("Can't unregister cdrom cm206\n");
+ return;
+ }
+ if (unregister_blkdev(MAJOR_NR, "cm206")) {
+ printk("Can't unregister major cm206\n");
+ return;
+ }
+ blk_cleanup_queue(cm206_queue);
+ free_irq(cm206_irq, NULL);
+ kfree(cd);
+ release_region(cm206_base, 16);
+ printk(KERN_INFO "cm206 removed\n");
+}
+
+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 */
+MODULE_ALIAS_BLOCKDEV_MAJOR(CM206_CDROM_MAJOR);
+
+/*
+ * 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:
+ */