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/usb/image/mdc800.c b/drivers/usb/image/mdc800.c
new file mode 100644
index 0000000..5791723
--- /dev/null
+++ b/drivers/usb/image/mdc800.c
@@ -0,0 +1,1063 @@
+/*
+ * copyright (C) 1999/2000 by Henning Zabel <henning@uni-paderborn.de>
+ *
+ * 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.
+ */
+
+
+/*
+ * USB-Kernel Driver for the Mustek MDC800 Digital Camera
+ * (c) 1999/2000 Henning Zabel <henning@uni-paderborn.de>
+ *
+ *
+ * The driver brings the USB functions of the MDC800 to Linux.
+ * To use the Camera you must support the USB Protocoll of the camera
+ * to the Kernel Node.
+ * The Driver uses a misc device Node. Create it with :
+ * mknod /dev/mustek c 180 32
+ *
+ * The driver supports only one camera.
+ *
+ * Fix: mdc800 used sleep_on and slept with io_lock held.
+ * Converted sleep_on to waitqueues with schedule_timeout and made io_lock
+ * a semaphore from a spinlock.
+ * by Oliver Neukum <oliver@neukum.name>
+ * (02/12/2001)
+ *
+ * Identify version on module load.
+ * (08/04/2001) gb
+ *
+ * version 0.7.5
+ * Fixed potential SMP races with Spinlocks.
+ * Thanks to Oliver Neukum <oliver@neukum.name> who
+ * noticed the race conditions.
+ * (30/10/2000)
+ *
+ * Fixed: Setting urb->dev before submitting urb.
+ * by Greg KH <greg@kroah.com>
+ * (13/10/2000)
+ *
+ * version 0.7.3
+ * bugfix : The mdc800->state field gets set to READY after the
+ * the diconnect function sets it to NOT_CONNECTED. This makes the
+ * driver running like the camera is connected and causes some
+ * hang ups.
+ *
+ * version 0.7.1
+ * MOD_INC and MOD_DEC are changed in usb_probe to prevent load/unload
+ * problems when compiled as Module.
+ * (04/04/2000)
+ *
+ * The mdc800 driver gets assigned the USB Minor 32-47. The Registration
+ * was updated to use these values.
+ * (26/03/2000)
+ *
+ * The Init und Exit Module Function are updated.
+ * (01/03/2000)
+ *
+ * version 0.7.0
+ * Rewrite of the driver : The driver now uses URB's. The old stuff
+ * has been removed.
+ *
+ * version 0.6.0
+ * Rewrite of this driver: The Emulation of the rs232 protocoll
+ * has been removed from the driver. A special executeCommand function
+ * for this driver is included to gphoto.
+ * The driver supports two kind of communication to bulk endpoints.
+ * Either with the dev->bus->ops->bulk... or with callback function.
+ * (09/11/1999)
+ *
+ * version 0.5.0:
+ * first Version that gets a version number. Most of the needed
+ * functions work.
+ * (20/10/1999)
+ */
+
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include <linux/random.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/smp_lock.h>
+#include <linux/wait.h>
+
+#include <linux/usb.h>
+#include <linux/fs.h>
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v0.7.5 (30/10/2000)"
+#define DRIVER_AUTHOR "Henning Zabel <henning@uni-paderborn.de>"
+#define DRIVER_DESC "USB Driver for Mustek MDC800 Digital Camera"
+
+/* Vendor and Product Information */
+#define MDC800_VENDOR_ID 0x055f
+#define MDC800_PRODUCT_ID 0xa800
+
+/* Timeouts (msec) */
+#define TO_DOWNLOAD_GET_READY 1500
+#define TO_DOWNLOAD_GET_BUSY 1500
+#define TO_WRITE_GET_READY 1000
+#define TO_DEFAULT_COMMAND 5000
+#define TO_READ_FROM_IRQ TO_DEFAULT_COMMAND
+#define TO_GET_READY TO_DEFAULT_COMMAND
+
+/* Minor Number of the device (create with mknod /dev/mustek c 180 32) */
+#define MDC800_DEVICE_MINOR_BASE 32
+
+
+/**************************************************************************
+ Data and structs
+***************************************************************************/
+
+
+typedef enum {
+ NOT_CONNECTED, READY, WORKING, DOWNLOAD
+} mdc800_state;
+
+
+/* Data for the driver */
+struct mdc800_data
+{
+ struct usb_device * dev; // Device Data
+ mdc800_state state;
+
+ unsigned int endpoint [4];
+
+ struct urb * irq_urb;
+ wait_queue_head_t irq_wait;
+ int irq_woken;
+ char* irq_urb_buffer;
+
+ int camera_busy; // is camera busy ?
+ int camera_request_ready; // Status to synchronize with irq
+ char camera_response [8]; // last Bytes send after busy
+
+ struct urb * write_urb;
+ char* write_urb_buffer;
+ wait_queue_head_t write_wait;
+ int written;
+
+
+ struct urb * download_urb;
+ char* download_urb_buffer;
+ wait_queue_head_t download_wait;
+ int downloaded;
+ int download_left; // Bytes left to download ?
+
+
+ /* Device Data */
+ char out [64]; // Answer Buffer
+ int out_ptr; // Index to the first not readen byte
+ int out_count; // Bytes in the buffer
+
+ int open; // Camera device open ?
+ struct semaphore io_lock; // IO -lock
+
+ char in [8]; // Command Input Buffer
+ int in_count;
+
+ int pic_index; // Cache for the Imagesize (-1 for nothing cached )
+ int pic_len;
+ int minor;
+};
+
+
+/* Specification of the Endpoints */
+static struct usb_endpoint_descriptor mdc800_ed [4] =
+{
+ {
+ .bLength = 0,
+ .bDescriptorType = 0,
+ .bEndpointAddress = 0x01,
+ .bmAttributes = 0x02,
+ .wMaxPacketSize = __constant_cpu_to_le16(8),
+ .bInterval = 0,
+ .bRefresh = 0,
+ .bSynchAddress = 0,
+ },
+ {
+ .bLength = 0,
+ .bDescriptorType = 0,
+ .bEndpointAddress = 0x82,
+ .bmAttributes = 0x03,
+ .wMaxPacketSize = __constant_cpu_to_le16(8),
+ .bInterval = 0,
+ .bRefresh = 0,
+ .bSynchAddress = 0,
+ },
+ {
+ .bLength = 0,
+ .bDescriptorType = 0,
+ .bEndpointAddress = 0x03,
+ .bmAttributes = 0x02,
+ .wMaxPacketSize = __constant_cpu_to_le16(64),
+ .bInterval = 0,
+ .bRefresh = 0,
+ .bSynchAddress = 0,
+ },
+ {
+ .bLength = 0,
+ .bDescriptorType = 0,
+ .bEndpointAddress = 0x84,
+ .bmAttributes = 0x02,
+ .wMaxPacketSize = __constant_cpu_to_le16(64),
+ .bInterval = 0,
+ .bRefresh = 0,
+ .bSynchAddress = 0,
+ },
+};
+
+/* The Variable used by the driver */
+static struct mdc800_data* mdc800;
+
+
+/***************************************************************************
+ The USB Part of the driver
+****************************************************************************/
+
+static int mdc800_endpoint_equals (struct usb_endpoint_descriptor *a,struct usb_endpoint_descriptor *b)
+{
+ return (
+ ( a->bEndpointAddress == b->bEndpointAddress )
+ && ( a->bmAttributes == b->bmAttributes )
+ && ( a->wMaxPacketSize == b->wMaxPacketSize )
+ );
+}
+
+
+/*
+ * Checks whether the camera responds busy
+ */
+static int mdc800_isBusy (char* ch)
+{
+ int i=0;
+ while (i<8)
+ {
+ if (ch [i] != (char)0x99)
+ return 0;
+ i++;
+ }
+ return 1;
+}
+
+
+/*
+ * Checks whether the Camera is ready
+ */
+static int mdc800_isReady (char *ch)
+{
+ int i=0;
+ while (i<8)
+ {
+ if (ch [i] != (char)0xbb)
+ return 0;
+ i++;
+ }
+ return 1;
+}
+
+
+
+/*
+ * USB IRQ Handler for InputLine
+ */
+static void mdc800_usb_irq (struct urb *urb, struct pt_regs *res)
+{
+ int data_received=0, wake_up;
+ unsigned char* b=urb->transfer_buffer;
+ struct mdc800_data* mdc800=urb->context;
+
+ if (urb->status >= 0)
+ {
+
+ //dbg ("%i %i %i %i %i %i %i %i \n",b[0],b[1],b[2],b[3],b[4],b[5],b[6],b[7]);
+
+ if (mdc800_isBusy (b))
+ {
+ if (!mdc800->camera_busy)
+ {
+ mdc800->camera_busy=1;
+ dbg ("gets busy");
+ }
+ }
+ else
+ {
+ if (mdc800->camera_busy && mdc800_isReady (b))
+ {
+ mdc800->camera_busy=0;
+ dbg ("gets ready");
+ }
+ }
+ if (!(mdc800_isBusy (b) || mdc800_isReady (b)))
+ {
+ /* Store Data in camera_answer field */
+ dbg ("%i %i %i %i %i %i %i %i ",b[0],b[1],b[2],b[3],b[4],b[5],b[6],b[7]);
+
+ memcpy (mdc800->camera_response,b,8);
+ data_received=1;
+ }
+ }
+ wake_up= ( mdc800->camera_request_ready > 0 )
+ &&
+ (
+ ((mdc800->camera_request_ready == 1) && (!mdc800->camera_busy))
+ ||
+ ((mdc800->camera_request_ready == 2) && data_received)
+ ||
+ ((mdc800->camera_request_ready == 3) && (mdc800->camera_busy))
+ ||
+ (urb->status < 0)
+ );
+
+ if (wake_up)
+ {
+ mdc800->camera_request_ready=0;
+ mdc800->irq_woken=1;
+ wake_up (&mdc800->irq_wait);
+ }
+}
+
+
+/*
+ * Waits a while until the irq responds that camera is ready
+ *
+ * mode : 0: Wait for camera gets ready
+ * 1: Wait for receiving data
+ * 2: Wait for camera gets busy
+ *
+ * msec: Time to wait
+ */
+static int mdc800_usb_waitForIRQ (int mode, int msec)
+{
+ mdc800->camera_request_ready=1+mode;
+
+ wait_event_timeout(mdc800->irq_wait, mdc800->irq_woken, msec*HZ/1000);
+ mdc800->irq_woken = 0;
+
+ if (mdc800->camera_request_ready>0)
+ {
+ mdc800->camera_request_ready=0;
+ err ("timeout waiting for camera.");
+ return -1;
+ }
+
+ if (mdc800->state == NOT_CONNECTED)
+ {
+ warn ("Camera gets disconnected during waiting for irq.");
+ mdc800->camera_request_ready=0;
+ return -2;
+ }
+
+ return 0;
+}
+
+
+/*
+ * The write_urb callback function
+ */
+static void mdc800_usb_write_notify (struct urb *urb, struct pt_regs *res)
+{
+ struct mdc800_data* mdc800=urb->context;
+
+ if (urb->status != 0)
+ {
+ err ("writing command fails (status=%i)", urb->status);
+ }
+ else
+ {
+ mdc800->state=READY;
+ }
+ mdc800->written = 1;
+ wake_up (&mdc800->write_wait);
+}
+
+
+/*
+ * The download_urb callback function
+ */
+static void mdc800_usb_download_notify (struct urb *urb, struct pt_regs *res)
+{
+ struct mdc800_data* mdc800=urb->context;
+
+ if (urb->status == 0)
+ {
+ /* Fill output buffer with these data */
+ memcpy (mdc800->out, urb->transfer_buffer, 64);
+ mdc800->out_count=64;
+ mdc800->out_ptr=0;
+ mdc800->download_left-=64;
+ if (mdc800->download_left == 0)
+ {
+ mdc800->state=READY;
+ }
+ }
+ else
+ {
+ err ("request bytes fails (status:%i)", urb->status);
+ }
+ mdc800->downloaded = 1;
+ wake_up (&mdc800->download_wait);
+}
+
+
+/***************************************************************************
+ Probing for the Camera
+ ***************************************************************************/
+
+static struct usb_driver mdc800_usb_driver;
+static struct file_operations mdc800_device_ops;
+static struct usb_class_driver mdc800_class = {
+ .name = "usb/mdc800%d",
+ .fops = &mdc800_device_ops,
+ .mode = S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP,
+ .minor_base = MDC800_DEVICE_MINOR_BASE,
+};
+
+
+/*
+ * Callback to search the Mustek MDC800 on the USB Bus
+ */
+static int mdc800_usb_probe (struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ int i,j;
+ struct usb_host_interface *intf_desc;
+ struct usb_device *dev = interface_to_usbdev (intf);
+ int irq_interval=0;
+ int retval;
+
+ dbg ("(mdc800_usb_probe) called.");
+
+
+ if (mdc800->dev != NULL)
+ {
+ warn ("only one Mustek MDC800 is supported.");
+ return -ENODEV;
+ }
+
+ if (dev->descriptor.bNumConfigurations != 1)
+ {
+ err ("probe fails -> wrong Number of Configuration");
+ return -ENODEV;
+ }
+ intf_desc = intf->cur_altsetting;
+
+ if (
+ ( intf_desc->desc.bInterfaceClass != 0xff )
+ || ( intf_desc->desc.bInterfaceSubClass != 0 )
+ || ( intf_desc->desc.bInterfaceProtocol != 0 )
+ || ( intf_desc->desc.bNumEndpoints != 4)
+ )
+ {
+ err ("probe fails -> wrong Interface");
+ return -ENODEV;
+ }
+
+ /* Check the Endpoints */
+ for (i=0; i<4; i++)
+ {
+ mdc800->endpoint[i]=-1;
+ for (j=0; j<4; j++)
+ {
+ if (mdc800_endpoint_equals (&intf_desc->endpoint [j].desc,&mdc800_ed [i]))
+ {
+ mdc800->endpoint[i]=intf_desc->endpoint [j].desc.bEndpointAddress ;
+ if (i==1)
+ {
+ irq_interval=intf_desc->endpoint [j].desc.bInterval;
+ }
+
+ continue;
+ }
+ }
+ if (mdc800->endpoint[i] == -1)
+ {
+ err ("probe fails -> Wrong Endpoints.");
+ return -ENODEV;
+ }
+ }
+
+
+ info ("Found Mustek MDC800 on USB.");
+
+ down (&mdc800->io_lock);
+
+ retval = usb_register_dev(intf, &mdc800_class);
+ if (retval) {
+ err ("Not able to get a minor for this device.");
+ return -ENODEV;
+ }
+
+ mdc800->dev=dev;
+ mdc800->open=0;
+
+ /* Setup URB Structs */
+ usb_fill_int_urb (
+ mdc800->irq_urb,
+ mdc800->dev,
+ usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]),
+ mdc800->irq_urb_buffer,
+ 8,
+ mdc800_usb_irq,
+ mdc800,
+ irq_interval
+ );
+
+ usb_fill_bulk_urb (
+ mdc800->write_urb,
+ mdc800->dev,
+ usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]),
+ mdc800->write_urb_buffer,
+ 8,
+ mdc800_usb_write_notify,
+ mdc800
+ );
+
+ usb_fill_bulk_urb (
+ mdc800->download_urb,
+ mdc800->dev,
+ usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]),
+ mdc800->download_urb_buffer,
+ 64,
+ mdc800_usb_download_notify,
+ mdc800
+ );
+
+ mdc800->state=READY;
+
+ up (&mdc800->io_lock);
+
+ usb_set_intfdata(intf, mdc800);
+ return 0;
+}
+
+
+/*
+ * Disconnect USB device (maybe the MDC800)
+ */
+static void mdc800_usb_disconnect (struct usb_interface *intf)
+{
+ struct mdc800_data* mdc800 = usb_get_intfdata(intf);
+
+ dbg ("(mdc800_usb_disconnect) called");
+
+ if (mdc800) {
+ if (mdc800->state == NOT_CONNECTED)
+ return;
+
+ usb_deregister_dev(intf, &mdc800_class);
+
+ mdc800->state=NOT_CONNECTED;
+
+ usb_kill_urb(mdc800->irq_urb);
+ usb_kill_urb(mdc800->write_urb);
+ usb_kill_urb(mdc800->download_urb);
+
+ mdc800->dev = NULL;
+ usb_set_intfdata(intf, NULL);
+ }
+ info ("Mustek MDC800 disconnected from USB.");
+}
+
+
+/***************************************************************************
+ The Misc device Part (file_operations)
+****************************************************************************/
+
+/*
+ * This Function calc the Answersize for a command.
+ */
+static int mdc800_getAnswerSize (char command)
+{
+ switch ((unsigned char) command)
+ {
+ case 0x2a:
+ case 0x49:
+ case 0x51:
+ case 0x0d:
+ case 0x20:
+ case 0x07:
+ case 0x01:
+ case 0x25:
+ case 0x00:
+ return 8;
+
+ case 0x05:
+ case 0x3e:
+ return mdc800->pic_len;
+
+ case 0x09:
+ return 4096;
+
+ default:
+ return 0;
+ }
+}
+
+
+/*
+ * Init the device: (1) alloc mem (2) Increase MOD Count ..
+ */
+static int mdc800_device_open (struct inode* inode, struct file *file)
+{
+ int retval=0;
+ int errn=0;
+
+ down (&mdc800->io_lock);
+
+ if (mdc800->state == NOT_CONNECTED)
+ {
+ errn=-EBUSY;
+ goto error_out;
+ }
+ if (mdc800->open)
+ {
+ errn=-EBUSY;
+ goto error_out;
+ }
+
+ mdc800->in_count=0;
+ mdc800->out_count=0;
+ mdc800->out_ptr=0;
+ mdc800->pic_index=0;
+ mdc800->pic_len=-1;
+ mdc800->download_left=0;
+
+ mdc800->camera_busy=0;
+ mdc800->camera_request_ready=0;
+
+ retval=0;
+ mdc800->irq_urb->dev = mdc800->dev;
+ if (usb_submit_urb (mdc800->irq_urb, GFP_KERNEL))
+ {
+ err ("request USB irq fails (submit_retval=%i urb_status=%i).",retval, mdc800->irq_urb->status);
+ errn = -EIO;
+ goto error_out;
+ }
+
+ mdc800->open=1;
+ dbg ("Mustek MDC800 device opened.");
+
+error_out:
+ up (&mdc800->io_lock);
+ return errn;
+}
+
+
+/*
+ * Close the Camera and release Memory
+ */
+static int mdc800_device_release (struct inode* inode, struct file *file)
+{
+ int retval=0;
+ dbg ("Mustek MDC800 device closed.");
+
+ down (&mdc800->io_lock);
+ if (mdc800->open && (mdc800->state != NOT_CONNECTED))
+ {
+ usb_kill_urb(mdc800->irq_urb);
+ usb_kill_urb(mdc800->write_urb);
+ usb_kill_urb(mdc800->download_urb);
+ mdc800->open=0;
+ }
+ else
+ {
+ retval=-EIO;
+ }
+
+ up(&mdc800->io_lock);
+ return retval;
+}
+
+
+/*
+ * The Device read callback Function
+ */
+static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t len, loff_t *pos)
+{
+ size_t left=len, sts=len; /* single transfer size */
+ char __user *ptr = buf;
+
+ down (&mdc800->io_lock);
+ if (mdc800->state == NOT_CONNECTED)
+ {
+ up (&mdc800->io_lock);
+ return -EBUSY;
+ }
+ if (mdc800->state == WORKING)
+ {
+ warn ("Illegal State \"working\" reached during read ?!");
+ up (&mdc800->io_lock);
+ return -EBUSY;
+ }
+ if (!mdc800->open)
+ {
+ up (&mdc800->io_lock);
+ return -EBUSY;
+ }
+
+ while (left)
+ {
+ if (signal_pending (current))
+ {
+ up (&mdc800->io_lock);
+ return -EINTR;
+ }
+
+ sts=left > (mdc800->out_count-mdc800->out_ptr)?mdc800->out_count-mdc800->out_ptr:left;
+
+ if (sts <= 0)
+ {
+ /* Too less Data in buffer */
+ if (mdc800->state == DOWNLOAD)
+ {
+ mdc800->out_count=0;
+ mdc800->out_ptr=0;
+
+ /* Download -> Request new bytes */
+ mdc800->download_urb->dev = mdc800->dev;
+ if (usb_submit_urb (mdc800->download_urb, GFP_KERNEL))
+ {
+ err ("Can't submit download urb (status=%i)",mdc800->download_urb->status);
+ up (&mdc800->io_lock);
+ return len-left;
+ }
+ wait_event_timeout(mdc800->download_wait, mdc800->downloaded,
+ TO_DOWNLOAD_GET_READY*HZ/1000);
+ mdc800->downloaded = 0;
+ if (mdc800->download_urb->status != 0)
+ {
+ err ("request download-bytes fails (status=%i)",mdc800->download_urb->status);
+ up (&mdc800->io_lock);
+ return len-left;
+ }
+ }
+ else
+ {
+ /* No more bytes -> that's an error*/
+ up (&mdc800->io_lock);
+ return -EIO;
+ }
+ }
+ else
+ {
+ /* Copy Bytes */
+ if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr],
+ sts)) {
+ up(&mdc800->io_lock);
+ return -EFAULT;
+ }
+ ptr+=sts;
+ left-=sts;
+ mdc800->out_ptr+=sts;
+ }
+ }
+
+ up (&mdc800->io_lock);
+ return len-left;
+}
+
+
+/*
+ * The Device write callback Function
+ * If a 8Byte Command is received, it will be send to the camera.
+ * After this the driver initiates the request for the answer or
+ * just waits until the camera becomes ready.
+ */
+static ssize_t mdc800_device_write (struct file *file, const char __user *buf, size_t len, loff_t *pos)
+{
+ size_t i=0;
+
+ down (&mdc800->io_lock);
+ if (mdc800->state != READY)
+ {
+ up (&mdc800->io_lock);
+ return -EBUSY;
+ }
+ if (!mdc800->open )
+ {
+ up (&mdc800->io_lock);
+ return -EBUSY;
+ }
+
+ while (i<len)
+ {
+ unsigned char c;
+ if (signal_pending (current))
+ {
+ up (&mdc800->io_lock);
+ return -EINTR;
+ }
+
+ if(get_user(c, buf+i))
+ {
+ up(&mdc800->io_lock);
+ return -EFAULT;
+ }
+
+ /* check for command start */
+ if (c == 0x55)
+ {
+ mdc800->in_count=0;
+ mdc800->out_count=0;
+ mdc800->out_ptr=0;
+ mdc800->download_left=0;
+ }
+
+ /* save command byte */
+ if (mdc800->in_count < 8)
+ {
+ mdc800->in[mdc800->in_count] = c;
+ mdc800->in_count++;
+ }
+ else
+ {
+ up (&mdc800->io_lock);
+ return -EIO;
+ }
+
+ /* Command Buffer full ? -> send it to camera */
+ if (mdc800->in_count == 8)
+ {
+ int answersize;
+
+ if (mdc800_usb_waitForIRQ (0,TO_GET_READY))
+ {
+ err ("Camera didn't get ready.\n");
+ up (&mdc800->io_lock);
+ return -EIO;
+ }
+
+ answersize=mdc800_getAnswerSize (mdc800->in[1]);
+
+ mdc800->state=WORKING;
+ memcpy (mdc800->write_urb->transfer_buffer, mdc800->in,8);
+ mdc800->write_urb->dev = mdc800->dev;
+ if (usb_submit_urb (mdc800->write_urb, GFP_KERNEL))
+ {
+ err ("submitting write urb fails (status=%i)", mdc800->write_urb->status);
+ up (&mdc800->io_lock);
+ return -EIO;
+ }
+ wait_event_timeout(mdc800->write_wait, mdc800->written, TO_WRITE_GET_READY*HZ/1000);
+ mdc800->written = 0;
+ if (mdc800->state == WORKING)
+ {
+ usb_kill_urb(mdc800->write_urb);
+ up (&mdc800->io_lock);
+ return -EIO;
+ }
+
+ switch ((unsigned char) mdc800->in[1])
+ {
+ case 0x05: /* Download Image */
+ case 0x3e: /* Take shot in Fine Mode (WCam Mode) */
+ if (mdc800->pic_len < 0)
+ {
+ err ("call 0x07 before 0x05,0x3e");
+ mdc800->state=READY;
+ up (&mdc800->io_lock);
+ return -EIO;
+ }
+ mdc800->pic_len=-1;
+
+ case 0x09: /* Download Thumbnail */
+ mdc800->download_left=answersize+64;
+ mdc800->state=DOWNLOAD;
+ mdc800_usb_waitForIRQ (0,TO_DOWNLOAD_GET_BUSY);
+ break;
+
+
+ default:
+ if (answersize)
+ {
+
+ if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ))
+ {
+ err ("requesting answer from irq fails");
+ up (&mdc800->io_lock);
+ return -EIO;
+ }
+
+ /* Write dummy data, (this is ugly but part of the USB Protocol */
+ /* if you use endpoint 1 as bulk and not as irq) */
+ memcpy (mdc800->out, mdc800->camera_response,8);
+
+ /* This is the interpreted answer */
+ memcpy (&mdc800->out[8], mdc800->camera_response,8);
+
+ mdc800->out_ptr=0;
+ mdc800->out_count=16;
+
+ /* Cache the Imagesize, if command was getImageSize */
+ if (mdc800->in [1] == (char) 0x07)
+ {
+ mdc800->pic_len=(int) 65536*(unsigned char) mdc800->camera_response[0]+256*(unsigned char) mdc800->camera_response[1]+(unsigned char) mdc800->camera_response[2];
+
+ dbg ("cached imagesize = %i",mdc800->pic_len);
+ }
+
+ }
+ else
+ {
+ if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND))
+ {
+ err ("Command Timeout.");
+ up (&mdc800->io_lock);
+ return -EIO;
+ }
+ }
+ mdc800->state=READY;
+ break;
+ }
+ }
+ i++;
+ }
+ up (&mdc800->io_lock);
+ return i;
+}
+
+
+/***************************************************************************
+ Init and Cleanup this driver (Structs and types)
+****************************************************************************/
+
+/* File Operations of this drivers */
+static struct file_operations mdc800_device_ops =
+{
+ .owner = THIS_MODULE,
+ .read = mdc800_device_read,
+ .write = mdc800_device_write,
+ .open = mdc800_device_open,
+ .release = mdc800_device_release,
+};
+
+
+
+static struct usb_device_id mdc800_table [] = {
+ { USB_DEVICE(MDC800_VENDOR_ID, MDC800_PRODUCT_ID) },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, mdc800_table);
+/*
+ * USB Driver Struct for this device
+ */
+static struct usb_driver mdc800_usb_driver =
+{
+ .owner = THIS_MODULE,
+ .name = "mdc800",
+ .probe = mdc800_usb_probe,
+ .disconnect = mdc800_usb_disconnect,
+ .id_table = mdc800_table
+};
+
+
+
+/************************************************************************
+ Init and Cleanup this driver (Main Functions)
+*************************************************************************/
+
+#define try(A) if (!(A)) goto cleanup_on_fail;
+
+static int __init usb_mdc800_init (void)
+{
+ int retval = -ENODEV;
+ /* Allocate Memory */
+ try (mdc800=kmalloc (sizeof (struct mdc800_data), GFP_KERNEL));
+
+ memset(mdc800, 0, sizeof(struct mdc800_data));
+ mdc800->dev = NULL;
+ mdc800->open=0;
+ mdc800->state=NOT_CONNECTED;
+ init_MUTEX (&mdc800->io_lock);
+
+ init_waitqueue_head (&mdc800->irq_wait);
+ init_waitqueue_head (&mdc800->write_wait);
+ init_waitqueue_head (&mdc800->download_wait);
+
+ mdc800->irq_woken = 0;
+ mdc800->downloaded = 0;
+ mdc800->written = 0;
+
+ try (mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL));
+ try (mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL));
+ try (mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL));
+
+ try (mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL));
+ try (mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL));
+ try (mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL));
+
+ /* Register the driver */
+ retval = usb_register(&mdc800_usb_driver);
+ if (retval)
+ goto cleanup_on_fail;
+
+ info (DRIVER_VERSION ":" DRIVER_DESC);
+
+ return 0;
+
+ /* Clean driver up, when something fails */
+
+cleanup_on_fail:
+
+ if (mdc800 != NULL)
+ {
+ err ("can't alloc memory!");
+
+ kfree(mdc800->download_urb_buffer);
+ kfree(mdc800->write_urb_buffer);
+ kfree(mdc800->irq_urb_buffer);
+
+ usb_free_urb(mdc800->write_urb);
+ usb_free_urb(mdc800->download_urb);
+ usb_free_urb(mdc800->irq_urb);
+
+ kfree (mdc800);
+ }
+ mdc800 = NULL;
+ return retval;
+}
+
+
+static void __exit usb_mdc800_cleanup (void)
+{
+ usb_deregister (&mdc800_usb_driver);
+
+ usb_free_urb (mdc800->irq_urb);
+ usb_free_urb (mdc800->download_urb);
+ usb_free_urb (mdc800->write_urb);
+
+ kfree (mdc800->irq_urb_buffer);
+ kfree (mdc800->write_urb_buffer);
+ kfree (mdc800->download_urb_buffer);
+
+ kfree (mdc800);
+ mdc800 = NULL;
+}
+
+module_init (usb_mdc800_init);
+module_exit (usb_mdc800_cleanup);
+
+MODULE_AUTHOR( DRIVER_AUTHOR );
+MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_LICENSE("GPL");
+