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/media/video/cpia_pp.c b/drivers/media/video/cpia_pp.c
new file mode 100644
index 0000000..ddf184f
--- /dev/null
+++ b/drivers/media/video/cpia_pp.c
@@ -0,0 +1,886 @@
+/*
+ * cpia_pp CPiA Parallel Port driver
+ *
+ * Supports CPiA based parallel port Video Camera's.
+ *
+ * (C) Copyright 1999 Bas Huisman <bhuism@cs.utwente.nl>
+ * (C) Copyright 1999-2000 Scott J. Bertin <sbertin@securenym.net>,
+ * (C) Copyright 1999-2000 Peter Pregler <Peter_Pregler@email.com>
+ *
+ * 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.
+ */
+
+/* define _CPIA_DEBUG_ for verbose debug output (see cpia.h) */
+/* #define _CPIA_DEBUG_ 1 */
+
+#include <linux/config.h>
+
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <linux/kernel.h>
+#include <linux/parport.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/workqueue.h>
+#include <linux/smp_lock.h>
+#include <linux/sched.h>
+
+#include <linux/kmod.h>
+
+/* #define _CPIA_DEBUG_ define for verbose debug output */
+#include "cpia.h"
+
+static int cpia_pp_open(void *privdata);
+static int cpia_pp_registerCallback(void *privdata, void (*cb) (void *cbdata),
+ void *cbdata);
+static int cpia_pp_transferCmd(void *privdata, u8 *command, u8 *data);
+static int cpia_pp_streamStart(void *privdata);
+static int cpia_pp_streamStop(void *privdata);
+static int cpia_pp_streamRead(void *privdata, u8 *buffer, int noblock);
+static int cpia_pp_close(void *privdata);
+
+
+#define ABOUT "Parallel port driver for Vision CPiA based cameras"
+
+#define PACKET_LENGTH 8
+
+/* Magic numbers for defining port-device mappings */
+#define PPCPIA_PARPORT_UNSPEC -4
+#define PPCPIA_PARPORT_AUTO -3
+#define PPCPIA_PARPORT_OFF -2
+#define PPCPIA_PARPORT_NONE -1
+
+#ifdef MODULE
+static int parport_nr[PARPORT_MAX] = {[0 ... PARPORT_MAX - 1] = PPCPIA_PARPORT_UNSPEC};
+static char *parport[PARPORT_MAX] = {NULL,};
+
+MODULE_AUTHOR("B. Huisman <bhuism@cs.utwente.nl> & Peter Pregler <Peter_Pregler@email.com>");
+MODULE_DESCRIPTION("Parallel port driver for Vision CPiA based cameras");
+MODULE_LICENSE("GPL");
+
+module_param_array(parport, charp, NULL, 0);
+MODULE_PARM_DESC(parport, "'auto' or a list of parallel port numbers. Just like lp.");
+#else
+static int parport_nr[PARPORT_MAX] __initdata =
+ {[0 ... PARPORT_MAX - 1] = PPCPIA_PARPORT_UNSPEC};
+static int parport_ptr = 0;
+#endif
+
+struct pp_cam_entry {
+ struct pardevice *pdev;
+ struct parport *port;
+ struct work_struct cb_task;
+ int open_count;
+ wait_queue_head_t wq_stream;
+ /* image state flags */
+ int image_ready; /* we got an interrupt */
+ int image_complete; /* we have seen 4 EOI */
+
+ int streaming; /* we are in streaming mode */
+ int stream_irq;
+};
+
+static struct cpia_camera_ops cpia_pp_ops =
+{
+ cpia_pp_open,
+ cpia_pp_registerCallback,
+ cpia_pp_transferCmd,
+ cpia_pp_streamStart,
+ cpia_pp_streamStop,
+ cpia_pp_streamRead,
+ cpia_pp_close,
+ 1,
+ THIS_MODULE
+};
+
+static LIST_HEAD(cam_list);
+static spinlock_t cam_list_lock_pp;
+
+/* FIXME */
+static void cpia_parport_enable_irq( struct parport *port ) {
+ parport_enable_irq(port);
+ mdelay(10);
+ return;
+}
+
+static void cpia_parport_disable_irq( struct parport *port ) {
+ parport_disable_irq(port);
+ mdelay(10);
+ return;
+}
+
+/* Special CPiA PPC modes: These are invoked by using the 1284 Extensibility
+ * Link Flag during negotiation */
+#define UPLOAD_FLAG 0x08
+#define NIBBLE_TRANSFER 0x01
+#define ECP_TRANSFER 0x03
+
+#define PARPORT_CHUNK_SIZE PAGE_SIZE
+
+
+/****************************************************************************
+ *
+ * CPiA-specific low-level parport functions for nibble uploads
+ *
+ ***************************************************************************/
+/* CPiA nonstandard "Nibble" mode (no nDataAvail signal after each byte). */
+/* The standard kernel parport_ieee1284_read_nibble() fails with the CPiA... */
+
+static size_t cpia_read_nibble (struct parport *port,
+ void *buffer, size_t len,
+ int flags)
+{
+ /* adapted verbatim, with one change, from
+ parport_ieee1284_read_nibble() in drivers/parport/ieee1284-ops.c */
+
+ unsigned char *buf = buffer;
+ int i;
+ unsigned char byte = 0;
+
+ len *= 2; /* in nibbles */
+ for (i=0; i < len; i++) {
+ unsigned char nibble;
+
+ /* The CPiA firmware suppresses the use of nDataAvail (nFault LO)
+ * after every second nibble to signal that more
+ * data is available. (the total number of Bytes that
+ * should be sent is known; if too few are received, an error
+ * will be recorded after a timeout).
+ * This is incompatible with parport_ieee1284_read_nibble(),
+ * which expects to find nFault LO after every second nibble.
+ */
+
+ /* Solution: modify cpia_read_nibble to only check for
+ * nDataAvail before the first nibble is sent.
+ */
+
+ /* Does the error line indicate end of data? */
+ if (((i /*& 1*/) == 0) &&
+ (parport_read_status(port) & PARPORT_STATUS_ERROR)) {
+ port->physport->ieee1284.phase = IEEE1284_PH_HBUSY_DNA;
+ DBG("%s: No more nibble data (%d bytes)\n",
+ port->name, i/2);
+
+ /* Go to reverse idle phase. */
+ parport_frob_control (port,
+ PARPORT_CONTROL_AUTOFD,
+ PARPORT_CONTROL_AUTOFD);
+ port->physport->ieee1284.phase = IEEE1284_PH_REV_IDLE;
+ break;
+ }
+
+ /* Event 7: Set nAutoFd low. */
+ parport_frob_control (port,
+ PARPORT_CONTROL_AUTOFD,
+ PARPORT_CONTROL_AUTOFD);
+
+ /* Event 9: nAck goes low. */
+ port->ieee1284.phase = IEEE1284_PH_REV_DATA;
+ if (parport_wait_peripheral (port,
+ PARPORT_STATUS_ACK, 0)) {
+ /* Timeout -- no more data? */
+ DBG("%s: Nibble timeout at event 9 (%d bytes)\n",
+ port->name, i/2);
+ parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0);
+ break;
+ }
+
+
+ /* Read a nibble. */
+ nibble = parport_read_status (port) >> 3;
+ nibble &= ~8;
+ if ((nibble & 0x10) == 0)
+ nibble |= 8;
+ nibble &= 0xf;
+
+ /* Event 10: Set nAutoFd high. */
+ parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0);
+
+ /* Event 11: nAck goes high. */
+ if (parport_wait_peripheral (port,
+ PARPORT_STATUS_ACK,
+ PARPORT_STATUS_ACK)) {
+ /* Timeout -- no more data? */
+ DBG("%s: Nibble timeout at event 11\n",
+ port->name);
+ break;
+ }
+
+ if (i & 1) {
+ /* Second nibble */
+ byte |= nibble << 4;
+ *buf++ = byte;
+ } else
+ byte = nibble;
+ }
+
+ i /= 2; /* i is now in bytes */
+
+ if (i == len) {
+ /* Read the last nibble without checking data avail. */
+ port = port->physport;
+ if (parport_read_status (port) & PARPORT_STATUS_ERROR)
+ port->ieee1284.phase = IEEE1284_PH_HBUSY_DNA;
+ else
+ port->ieee1284.phase = IEEE1284_PH_HBUSY_DAVAIL;
+ }
+
+ return i;
+}
+
+/* CPiA nonstandard "Nibble Stream" mode (2 nibbles per cycle, instead of 1)
+ * (See CPiA Data sheet p. 31)
+ *
+ * "Nibble Stream" mode used by CPiA for uploads to non-ECP ports is a
+ * nonstandard variant of nibble mode which allows the same (mediocre)
+ * data flow of 8 bits per cycle as software-enabled ECP by TRISTATE-capable
+ * parallel ports, but works also for non-TRISTATE-capable ports.
+ * (Standard nibble mode only send 4 bits per cycle)
+ *
+ */
+
+static size_t cpia_read_nibble_stream(struct parport *port,
+ void *buffer, size_t len,
+ int flags)
+{
+ int i;
+ unsigned char *buf = buffer;
+ int endseen = 0;
+
+ for (i=0; i < len; i++) {
+ unsigned char nibble[2], byte = 0;
+ int j;
+
+ /* Image Data is complete when 4 consecutive EOI bytes (0xff) are seen */
+ if (endseen > 3 )
+ break;
+
+ /* Event 7: Set nAutoFd low. */
+ parport_frob_control (port,
+ PARPORT_CONTROL_AUTOFD,
+ PARPORT_CONTROL_AUTOFD);
+
+ /* Event 9: nAck goes low. */
+ port->ieee1284.phase = IEEE1284_PH_REV_DATA;
+ if (parport_wait_peripheral (port,
+ PARPORT_STATUS_ACK, 0)) {
+ /* Timeout -- no more data? */
+ DBG("%s: Nibble timeout at event 9 (%d bytes)\n",
+ port->name, i/2);
+ parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0);
+ break;
+ }
+
+ /* Read lower nibble */
+ nibble[0] = parport_read_status (port) >>3;
+
+ /* Event 10: Set nAutoFd high. */
+ parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0);
+
+ /* Event 11: nAck goes high. */
+ if (parport_wait_peripheral (port,
+ PARPORT_STATUS_ACK,
+ PARPORT_STATUS_ACK)) {
+ /* Timeout -- no more data? */
+ DBG("%s: Nibble timeout at event 11\n",
+ port->name);
+ break;
+ }
+
+ /* Read upper nibble */
+ nibble[1] = parport_read_status (port) >>3;
+
+ /* reassemble the byte */
+ for (j = 0; j < 2 ; j++ ) {
+ nibble[j] &= ~8;
+ if ((nibble[j] & 0x10) == 0)
+ nibble[j] |= 8;
+ nibble[j] &= 0xf;
+ }
+ byte = (nibble[0] |(nibble[1] << 4));
+ *buf++ = byte;
+
+ if(byte == EOI)
+ endseen++;
+ else
+ endseen = 0;
+ }
+ return i;
+}
+
+/****************************************************************************
+ *
+ * EndTransferMode
+ *
+ ***************************************************************************/
+static void EndTransferMode(struct pp_cam_entry *cam)
+{
+ parport_negotiate(cam->port, IEEE1284_MODE_COMPAT);
+}
+
+/****************************************************************************
+ *
+ * ForwardSetup
+ *
+ ***************************************************************************/
+static int ForwardSetup(struct pp_cam_entry *cam)
+{
+ int retry;
+
+ /* The CPiA uses ECP protocol for Downloads from the Host to the camera.
+ * This will be software-emulated if ECP hardware is not present
+ */
+
+ /* the usual camera maximum response time is 10ms, but after receiving
+ * some commands, it needs up to 40ms. (Data Sheet p. 32)*/
+
+ for(retry = 0; retry < 4; ++retry) {
+ if(!parport_negotiate(cam->port, IEEE1284_MODE_ECP)) {
+ break;
+ }
+ mdelay(10);
+ }
+ if(retry == 4) {
+ DBG("Unable to negotiate IEEE1284 ECP Download mode\n");
+ return -1;
+ }
+ return 0;
+}
+/****************************************************************************
+ *
+ * ReverseSetup
+ *
+ ***************************************************************************/
+static int ReverseSetup(struct pp_cam_entry *cam, int extensibility)
+{
+ int retry;
+ int upload_mode, mode = IEEE1284_MODE_ECP;
+ int transfer_mode = ECP_TRANSFER;
+
+ if (!(cam->port->modes & PARPORT_MODE_ECP) &&
+ !(cam->port->modes & PARPORT_MODE_TRISTATE)) {
+ mode = IEEE1284_MODE_NIBBLE;
+ transfer_mode = NIBBLE_TRANSFER;
+ }
+
+ upload_mode = mode;
+ if(extensibility) mode = UPLOAD_FLAG|transfer_mode|IEEE1284_EXT_LINK;
+
+ /* the usual camera maximum response time is 10ms, but after
+ * receiving some commands, it needs up to 40ms. */
+
+ for(retry = 0; retry < 4; ++retry) {
+ if(!parport_negotiate(cam->port, mode)) {
+ break;
+ }
+ mdelay(10);
+ }
+ if(retry == 4) {
+ if(extensibility)
+ DBG("Unable to negotiate upload extensibility mode\n");
+ else
+ DBG("Unable to negotiate upload mode\n");
+ return -1;
+ }
+ if(extensibility) cam->port->ieee1284.mode = upload_mode;
+ return 0;
+}
+
+/****************************************************************************
+ *
+ * WritePacket
+ *
+ ***************************************************************************/
+static int WritePacket(struct pp_cam_entry *cam, const u8 *packet, size_t size)
+{
+ int retval=0;
+ int size_written;
+
+ if (packet == NULL) {
+ return -EINVAL;
+ }
+ if (ForwardSetup(cam)) {
+ DBG("Write failed in setup\n");
+ return -EIO;
+ }
+ size_written = parport_write(cam->port, packet, size);
+ if(size_written != size) {
+ DBG("Write failed, wrote %d/%d\n", size_written, size);
+ retval = -EIO;
+ }
+ EndTransferMode(cam);
+ return retval;
+}
+
+/****************************************************************************
+ *
+ * ReadPacket
+ *
+ ***************************************************************************/
+static int ReadPacket(struct pp_cam_entry *cam, u8 *packet, size_t size)
+{
+ int retval=0;
+
+ if (packet == NULL) {
+ return -EINVAL;
+ }
+ if (ReverseSetup(cam, 0)) {
+ return -EIO;
+ }
+
+ /* support for CPiA variant nibble reads */
+ if(cam->port->ieee1284.mode == IEEE1284_MODE_NIBBLE) {
+ if(cpia_read_nibble(cam->port, packet, size, 0) != size)
+ retval = -EIO;
+ } else {
+ if(parport_read(cam->port, packet, size) != size)
+ retval = -EIO;
+ }
+ EndTransferMode(cam);
+ return retval;
+}
+
+/****************************************************************************
+ *
+ * cpia_pp_streamStart
+ *
+ ***************************************************************************/
+static int cpia_pp_streamStart(void *privdata)
+{
+ struct pp_cam_entry *cam = privdata;
+ DBG("\n");
+ cam->streaming=1;
+ cam->image_ready=0;
+ //if (ReverseSetup(cam,1)) return -EIO;
+ if(cam->stream_irq) cpia_parport_enable_irq(cam->port);
+ return 0;
+}
+
+/****************************************************************************
+ *
+ * cpia_pp_streamStop
+ *
+ ***************************************************************************/
+static int cpia_pp_streamStop(void *privdata)
+{
+ struct pp_cam_entry *cam = privdata;
+
+ DBG("\n");
+ cam->streaming=0;
+ cpia_parport_disable_irq(cam->port);
+ //EndTransferMode(cam);
+
+ return 0;
+}
+
+/****************************************************************************
+ *
+ * cpia_pp_streamRead
+ *
+ ***************************************************************************/
+static int cpia_pp_read(struct parport *port, u8 *buffer, int len)
+{
+ int bytes_read;
+
+ /* support for CPiA variant "nibble stream" reads */
+ if(port->ieee1284.mode == IEEE1284_MODE_NIBBLE)
+ bytes_read = cpia_read_nibble_stream(port,buffer,len,0);
+ else {
+ int new_bytes;
+ for(bytes_read=0; bytes_read<len; bytes_read += new_bytes) {
+ new_bytes = parport_read(port, buffer+bytes_read,
+ len-bytes_read);
+ if(new_bytes < 0) break;
+ }
+ }
+ return bytes_read;
+}
+
+static int cpia_pp_streamRead(void *privdata, u8 *buffer, int noblock)
+{
+ struct pp_cam_entry *cam = privdata;
+ int read_bytes = 0;
+ int i, endseen, block_size, new_bytes;
+
+ if(cam == NULL) {
+ DBG("Internal driver error: cam is NULL\n");
+ return -EINVAL;
+ }
+ if(buffer == NULL) {
+ DBG("Internal driver error: buffer is NULL\n");
+ return -EINVAL;
+ }
+ //if(cam->streaming) DBG("%d / %d\n", cam->image_ready, noblock);
+ if( cam->stream_irq ) {
+ DBG("%d\n", cam->image_ready);
+ cam->image_ready--;
+ }
+ cam->image_complete=0;
+ if (0/*cam->streaming*/) {
+ if(!cam->image_ready) {
+ if(noblock) return -EWOULDBLOCK;
+ interruptible_sleep_on(&cam->wq_stream);
+ if( signal_pending(current) ) return -EINTR;
+ DBG("%d\n", cam->image_ready);
+ }
+ } else {
+ if (ReverseSetup(cam, 1)) {
+ DBG("unable to ReverseSetup\n");
+ return -EIO;
+ }
+ }
+ endseen = 0;
+ block_size = PARPORT_CHUNK_SIZE;
+ while( !cam->image_complete ) {
+ cond_resched();
+
+ new_bytes = cpia_pp_read(cam->port, buffer, block_size );
+ if( new_bytes <= 0 ) {
+ break;
+ }
+ i=-1;
+ while(++i<new_bytes && endseen<4) {
+ if(*buffer==EOI) {
+ endseen++;
+ } else {
+ endseen=0;
+ }
+ buffer++;
+ }
+ read_bytes += i;
+ if( endseen==4 ) {
+ cam->image_complete=1;
+ break;
+ }
+ if( CPIA_MAX_IMAGE_SIZE-read_bytes <= PARPORT_CHUNK_SIZE ) {
+ block_size=CPIA_MAX_IMAGE_SIZE-read_bytes;
+ }
+ }
+ EndTransferMode(cam);
+ return cam->image_complete ? read_bytes : -EIO;
+}
+/****************************************************************************
+ *
+ * cpia_pp_transferCmd
+ *
+ ***************************************************************************/
+static int cpia_pp_transferCmd(void *privdata, u8 *command, u8 *data)
+{
+ int err;
+ int retval=0;
+ int databytes;
+ struct pp_cam_entry *cam = privdata;
+
+ if(cam == NULL) {
+ DBG("Internal driver error: cam is NULL\n");
+ return -EINVAL;
+ }
+ if(command == NULL) {
+ DBG("Internal driver error: command is NULL\n");
+ return -EINVAL;
+ }
+ databytes = (((int)command[7])<<8) | command[6];
+ if ((err = WritePacket(cam, command, PACKET_LENGTH)) < 0) {
+ DBG("Error writing command\n");
+ return err;
+ }
+ if(command[0] == DATA_IN) {
+ u8 buffer[8];
+ if(data == NULL) {
+ DBG("Internal driver error: data is NULL\n");
+ return -EINVAL;
+ }
+ if((err = ReadPacket(cam, buffer, 8)) < 0) {
+ DBG("Error reading command result\n");
+ return err;
+ }
+ memcpy(data, buffer, databytes);
+ } else if(command[0] == DATA_OUT) {
+ if(databytes > 0) {
+ if(data == NULL) {
+ DBG("Internal driver error: data is NULL\n");
+ retval = -EINVAL;
+ } else {
+ if((err=WritePacket(cam, data, databytes)) < 0){
+ DBG("Error writing command data\n");
+ return err;
+ }
+ }
+ }
+ } else {
+ DBG("Unexpected first byte of command: %x\n", command[0]);
+ retval = -EINVAL;
+ }
+ return retval;
+}
+
+/****************************************************************************
+ *
+ * cpia_pp_open
+ *
+ ***************************************************************************/
+static int cpia_pp_open(void *privdata)
+{
+ struct pp_cam_entry *cam = (struct pp_cam_entry *)privdata;
+
+ if (cam == NULL)
+ return -EINVAL;
+
+ if(cam->open_count == 0) {
+ if (parport_claim(cam->pdev)) {
+ DBG("failed to claim the port\n");
+ return -EBUSY;
+ }
+ parport_negotiate(cam->port, IEEE1284_MODE_COMPAT);
+ parport_data_forward(cam->port);
+ parport_write_control(cam->port, PARPORT_CONTROL_SELECT);
+ udelay(50);
+ parport_write_control(cam->port,
+ PARPORT_CONTROL_SELECT
+ | PARPORT_CONTROL_INIT);
+ }
+
+ ++cam->open_count;
+
+ return 0;
+}
+
+/****************************************************************************
+ *
+ * cpia_pp_registerCallback
+ *
+ ***************************************************************************/
+static int cpia_pp_registerCallback(void *privdata, void (*cb)(void *cbdata), void *cbdata)
+{
+ struct pp_cam_entry *cam = privdata;
+ int retval = 0;
+
+ if(cam->port->irq != PARPORT_IRQ_NONE) {
+ INIT_WORK(&cam->cb_task, cb, cbdata);
+ } else {
+ retval = -1;
+ }
+ return retval;
+}
+
+/****************************************************************************
+ *
+ * cpia_pp_close
+ *
+ ***************************************************************************/
+static int cpia_pp_close(void *privdata)
+{
+ struct pp_cam_entry *cam = privdata;
+ if (--cam->open_count == 0) {
+ parport_release(cam->pdev);
+ }
+ return 0;
+}
+
+/****************************************************************************
+ *
+ * cpia_pp_register
+ *
+ ***************************************************************************/
+static int cpia_pp_register(struct parport *port)
+{
+ struct pardevice *pdev = NULL;
+ struct pp_cam_entry *cam;
+ struct cam_data *cpia;
+
+ if (!(port->modes & PARPORT_MODE_PCSPP)) {
+ LOG("port is not supported by CPiA driver\n");
+ return -ENXIO;
+ }
+
+ cam = kmalloc(sizeof(struct pp_cam_entry), GFP_KERNEL);
+ if (cam == NULL) {
+ LOG("failed to allocate camera structure\n");
+ return -ENOMEM;
+ }
+ memset(cam,0,sizeof(struct pp_cam_entry));
+
+ pdev = parport_register_device(port, "cpia_pp", NULL, NULL,
+ NULL, 0, cam);
+
+ if (!pdev) {
+ LOG("failed to parport_register_device\n");
+ kfree(cam);
+ return -ENXIO;
+ }
+
+ cam->pdev = pdev;
+ cam->port = port;
+ init_waitqueue_head(&cam->wq_stream);
+
+ cam->streaming = 0;
+ cam->stream_irq = 0;
+
+ if((cpia = cpia_register_camera(&cpia_pp_ops, cam)) == NULL) {
+ LOG("failed to cpia_register_camera\n");
+ parport_unregister_device(pdev);
+ kfree(cam);
+ return -ENXIO;
+ }
+ spin_lock( &cam_list_lock_pp );
+ list_add( &cpia->cam_data_list, &cam_list );
+ spin_unlock( &cam_list_lock_pp );
+
+ return 0;
+}
+
+static void cpia_pp_detach (struct parport *port)
+{
+ struct list_head *tmp;
+ struct cam_data *cpia = NULL;
+ struct pp_cam_entry *cam;
+
+ spin_lock( &cam_list_lock_pp );
+ list_for_each (tmp, &cam_list) {
+ cpia = list_entry(tmp, struct cam_data, cam_data_list);
+ cam = (struct pp_cam_entry *) cpia->lowlevel_data;
+ if (cam && cam->port->number == port->number) {
+ list_del(&cpia->cam_data_list);
+ break;
+ }
+ cpia = NULL;
+ }
+ spin_unlock( &cam_list_lock_pp );
+
+ if (!cpia) {
+ DBG("cpia_pp_detach failed to find cam_data in cam_list\n");
+ return;
+ }
+
+ cam = (struct pp_cam_entry *) cpia->lowlevel_data;
+ cpia_unregister_camera(cpia);
+ if(cam->open_count > 0)
+ cpia_pp_close(cam);
+ parport_unregister_device(cam->pdev);
+ cpia->lowlevel_data = NULL;
+ kfree(cam);
+}
+
+static void cpia_pp_attach (struct parport *port)
+{
+ unsigned int i;
+
+ switch (parport_nr[0])
+ {
+ case PPCPIA_PARPORT_UNSPEC:
+ case PPCPIA_PARPORT_AUTO:
+ if (port->probe_info[0].class != PARPORT_CLASS_MEDIA ||
+ port->probe_info[0].cmdset == NULL ||
+ strncmp(port->probe_info[0].cmdset, "CPIA_1", 6) != 0)
+ return;
+
+ cpia_pp_register(port);
+
+ break;
+
+ default:
+ for (i = 0; i < PARPORT_MAX; ++i) {
+ if (port->number == parport_nr[i]) {
+ cpia_pp_register(port);
+ break;
+ }
+ }
+ break;
+ }
+}
+
+static struct parport_driver cpia_pp_driver = {
+ .name = "cpia_pp",
+ .attach = cpia_pp_attach,
+ .detach = cpia_pp_detach,
+};
+
+int cpia_pp_init(void)
+{
+ printk(KERN_INFO "%s v%d.%d.%d\n",ABOUT,
+ CPIA_PP_MAJ_VER,CPIA_PP_MIN_VER,CPIA_PP_PATCH_VER);
+
+ if(parport_nr[0] == PPCPIA_PARPORT_OFF) {
+ printk(" disabled\n");
+ return 0;
+ }
+
+ spin_lock_init( &cam_list_lock_pp );
+
+ if (parport_register_driver (&cpia_pp_driver)) {
+ LOG ("unable to register with parport\n");
+ return -EIO;
+ }
+ return 0;
+}
+
+#ifdef MODULE
+int init_module(void)
+{
+ if (parport[0]) {
+ /* The user gave some parameters. Let's see what they were. */
+ if (!strncmp(parport[0], "auto", 4)) {
+ parport_nr[0] = PPCPIA_PARPORT_AUTO;
+ } else {
+ int n;
+ for (n = 0; n < PARPORT_MAX && parport[n]; n++) {
+ if (!strncmp(parport[n], "none", 4)) {
+ parport_nr[n] = PPCPIA_PARPORT_NONE;
+ } else {
+ char *ep;
+ unsigned long r = simple_strtoul(parport[n], &ep, 0);
+ if (ep != parport[n]) {
+ parport_nr[n] = r;
+ } else {
+ LOG("bad port specifier `%s'\n", parport[n]);
+ return -ENODEV;
+ }
+ }
+ }
+ }
+ }
+ return cpia_pp_init();
+}
+
+void cleanup_module(void)
+{
+ parport_unregister_driver (&cpia_pp_driver);
+ return;
+}
+
+#else /* !MODULE */
+
+static int __init cpia_pp_setup(char *str)
+{
+ if (!strncmp(str, "parport", 7)) {
+ int n = simple_strtoul(str + 7, NULL, 10);
+ if (parport_ptr < PARPORT_MAX) {
+ parport_nr[parport_ptr++] = n;
+ } else {
+ LOG("too many ports, %s ignored.\n", str);
+ }
+ } else if (!strcmp(str, "auto")) {
+ parport_nr[0] = PPCPIA_PARPORT_AUTO;
+ } else if (!strcmp(str, "none")) {
+ parport_nr[parport_ptr++] = PPCPIA_PARPORT_NONE;
+ }
+
+ return 0;
+}
+
+__setup("cpia_pp=", cpia_pp_setup);
+
+#endif /* !MODULE */