forked from Minki/linux
174cd4b1e5
Fix up affected files that include this signal functionality via sched.h. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
1090 lines
24 KiB
C
1090 lines
24 KiB
C
/*
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* copyright (C) 1999/2000 by Henning Zabel <henning@uni-paderborn.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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* USB-Kernel Driver for the Mustek MDC800 Digital Camera
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* (c) 1999/2000 Henning Zabel <henning@uni-paderborn.de>
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*
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*
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* The driver brings the USB functions of the MDC800 to Linux.
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* To use the Camera you must support the USB Protocol of the camera
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* to the Kernel Node.
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* The Driver uses a misc device Node. Create it with :
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* mknod /dev/mustek c 180 32
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*
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* The driver supports only one camera.
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*
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* Fix: mdc800 used sleep_on and slept with io_lock held.
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* Converted sleep_on to waitqueues with schedule_timeout and made io_lock
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* a semaphore from a spinlock.
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* by Oliver Neukum <oliver@neukum.name>
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* (02/12/2001)
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*
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* Identify version on module load.
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* (08/04/2001) gb
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*
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* version 0.7.5
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* Fixed potential SMP races with Spinlocks.
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* Thanks to Oliver Neukum <oliver@neukum.name> who
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* noticed the race conditions.
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* (30/10/2000)
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*
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* Fixed: Setting urb->dev before submitting urb.
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* by Greg KH <greg@kroah.com>
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* (13/10/2000)
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*
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* version 0.7.3
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* bugfix : The mdc800->state field gets set to READY after the
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* the disconnect function sets it to NOT_CONNECTED. This makes the
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* driver running like the camera is connected and causes some
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* hang ups.
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*
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* version 0.7.1
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* MOD_INC and MOD_DEC are changed in usb_probe to prevent load/unload
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* problems when compiled as Module.
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* (04/04/2000)
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*
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* The mdc800 driver gets assigned the USB Minor 32-47. The Registration
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* was updated to use these values.
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* (26/03/2000)
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*
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* The Init und Exit Module Function are updated.
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* (01/03/2000)
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*
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* version 0.7.0
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* Rewrite of the driver : The driver now uses URB's. The old stuff
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* has been removed.
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*
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* version 0.6.0
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* Rewrite of this driver: The Emulation of the rs232 protocoll
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* has been removed from the driver. A special executeCommand function
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* for this driver is included to gphoto.
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* The driver supports two kind of communication to bulk endpoints.
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* Either with the dev->bus->ops->bulk... or with callback function.
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* (09/11/1999)
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*
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* version 0.5.0:
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* first Version that gets a version number. Most of the needed
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* functions work.
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* (20/10/1999)
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*/
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#include <linux/sched/signal.h>
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#include <linux/signal.h>
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#include <linux/spinlock.h>
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#include <linux/errno.h>
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#include <linux/random.h>
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#include <linux/poll.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/wait.h>
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#include <linux/mutex.h>
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#include <linux/usb.h>
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#include <linux/fs.h>
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "v0.7.5 (30/10/2000)"
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#define DRIVER_AUTHOR "Henning Zabel <henning@uni-paderborn.de>"
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#define DRIVER_DESC "USB Driver for Mustek MDC800 Digital Camera"
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/* Vendor and Product Information */
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#define MDC800_VENDOR_ID 0x055f
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#define MDC800_PRODUCT_ID 0xa800
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/* Timeouts (msec) */
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#define TO_DOWNLOAD_GET_READY 1500
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#define TO_DOWNLOAD_GET_BUSY 1500
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#define TO_WRITE_GET_READY 1000
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#define TO_DEFAULT_COMMAND 5000
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#define TO_READ_FROM_IRQ TO_DEFAULT_COMMAND
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#define TO_GET_READY TO_DEFAULT_COMMAND
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/* Minor Number of the device (create with mknod /dev/mustek c 180 32) */
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#define MDC800_DEVICE_MINOR_BASE 32
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/**************************************************************************
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Data and structs
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***************************************************************************/
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typedef enum {
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NOT_CONNECTED, READY, WORKING, DOWNLOAD
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} mdc800_state;
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/* Data for the driver */
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struct mdc800_data
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{
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struct usb_device * dev; // Device Data
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mdc800_state state;
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unsigned int endpoint [4];
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struct urb * irq_urb;
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wait_queue_head_t irq_wait;
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int irq_woken;
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char* irq_urb_buffer;
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int camera_busy; // is camera busy ?
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int camera_request_ready; // Status to synchronize with irq
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char camera_response [8]; // last Bytes send after busy
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struct urb * write_urb;
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char* write_urb_buffer;
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wait_queue_head_t write_wait;
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int written;
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struct urb * download_urb;
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char* download_urb_buffer;
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wait_queue_head_t download_wait;
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int downloaded;
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int download_left; // Bytes left to download ?
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/* Device Data */
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char out [64]; // Answer Buffer
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int out_ptr; // Index to the first not readen byte
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int out_count; // Bytes in the buffer
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int open; // Camera device open ?
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struct mutex io_lock; // IO -lock
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char in [8]; // Command Input Buffer
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int in_count;
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int pic_index; // Cache for the Imagesize (-1 for nothing cached )
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int pic_len;
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int minor;
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};
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/* Specification of the Endpoints */
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static struct usb_endpoint_descriptor mdc800_ed [4] =
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{
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{
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.bLength = 0,
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.bDescriptorType = 0,
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.bEndpointAddress = 0x01,
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.bmAttributes = 0x02,
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.wMaxPacketSize = cpu_to_le16(8),
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.bInterval = 0,
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.bRefresh = 0,
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.bSynchAddress = 0,
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},
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{
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.bLength = 0,
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.bDescriptorType = 0,
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.bEndpointAddress = 0x82,
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.bmAttributes = 0x03,
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.wMaxPacketSize = cpu_to_le16(8),
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.bInterval = 0,
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.bRefresh = 0,
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.bSynchAddress = 0,
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},
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{
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.bLength = 0,
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.bDescriptorType = 0,
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.bEndpointAddress = 0x03,
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.bmAttributes = 0x02,
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.wMaxPacketSize = cpu_to_le16(64),
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.bInterval = 0,
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.bRefresh = 0,
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.bSynchAddress = 0,
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},
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{
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.bLength = 0,
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.bDescriptorType = 0,
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.bEndpointAddress = 0x84,
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.bmAttributes = 0x02,
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.wMaxPacketSize = cpu_to_le16(64),
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.bInterval = 0,
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.bRefresh = 0,
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.bSynchAddress = 0,
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},
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};
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/* The Variable used by the driver */
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static struct mdc800_data* mdc800;
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/***************************************************************************
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The USB Part of the driver
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****************************************************************************/
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static int mdc800_endpoint_equals (struct usb_endpoint_descriptor *a,struct usb_endpoint_descriptor *b)
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{
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return (
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( a->bEndpointAddress == b->bEndpointAddress )
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&& ( a->bmAttributes == b->bmAttributes )
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&& ( a->wMaxPacketSize == b->wMaxPacketSize )
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);
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}
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/*
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* Checks whether the camera responds busy
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*/
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static int mdc800_isBusy (char* ch)
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{
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int i=0;
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while (i<8)
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{
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if (ch [i] != (char)0x99)
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return 0;
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i++;
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}
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return 1;
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}
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/*
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* Checks whether the Camera is ready
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*/
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static int mdc800_isReady (char *ch)
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{
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int i=0;
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while (i<8)
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{
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if (ch [i] != (char)0xbb)
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return 0;
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i++;
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}
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return 1;
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}
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/*
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* USB IRQ Handler for InputLine
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*/
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static void mdc800_usb_irq (struct urb *urb)
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{
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int data_received=0, wake_up;
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unsigned char* b=urb->transfer_buffer;
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struct mdc800_data* mdc800=urb->context;
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struct device *dev = &mdc800->dev->dev;
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int status = urb->status;
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if (status >= 0) {
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if (mdc800_isBusy (b))
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{
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if (!mdc800->camera_busy)
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{
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mdc800->camera_busy=1;
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dev_dbg(dev, "gets busy\n");
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}
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}
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else
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{
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if (mdc800->camera_busy && mdc800_isReady (b))
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{
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mdc800->camera_busy=0;
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dev_dbg(dev, "gets ready\n");
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}
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}
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if (!(mdc800_isBusy (b) || mdc800_isReady (b)))
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{
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/* Store Data in camera_answer field */
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dev_dbg(dev, "%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]);
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memcpy (mdc800->camera_response,b,8);
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data_received=1;
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}
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}
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wake_up= ( mdc800->camera_request_ready > 0 )
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&&
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(
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((mdc800->camera_request_ready == 1) && (!mdc800->camera_busy))
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||
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((mdc800->camera_request_ready == 2) && data_received)
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||
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((mdc800->camera_request_ready == 3) && (mdc800->camera_busy))
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||
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(status < 0)
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);
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if (wake_up)
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{
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mdc800->camera_request_ready=0;
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mdc800->irq_woken=1;
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wake_up (&mdc800->irq_wait);
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}
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}
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/*
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* Waits a while until the irq responds that camera is ready
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*
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* mode : 0: Wait for camera gets ready
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* 1: Wait for receiving data
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* 2: Wait for camera gets busy
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*
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* msec: Time to wait
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*/
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static int mdc800_usb_waitForIRQ (int mode, int msec)
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{
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mdc800->camera_request_ready=1+mode;
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wait_event_timeout(mdc800->irq_wait, mdc800->irq_woken,
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msecs_to_jiffies(msec));
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mdc800->irq_woken = 0;
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if (mdc800->camera_request_ready>0)
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{
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mdc800->camera_request_ready=0;
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dev_err(&mdc800->dev->dev, "timeout waiting for camera.\n");
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return -1;
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}
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if (mdc800->state == NOT_CONNECTED)
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{
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printk(KERN_WARNING "mdc800: Camera gets disconnected "
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"during waiting for irq.\n");
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mdc800->camera_request_ready=0;
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return -2;
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}
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return 0;
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}
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/*
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* The write_urb callback function
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*/
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static void mdc800_usb_write_notify (struct urb *urb)
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{
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struct mdc800_data* mdc800=urb->context;
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int status = urb->status;
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if (status != 0)
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dev_err(&mdc800->dev->dev,
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"writing command fails (status=%i)\n", status);
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else
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mdc800->state=READY;
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mdc800->written = 1;
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wake_up (&mdc800->write_wait);
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}
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/*
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* The download_urb callback function
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*/
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static void mdc800_usb_download_notify (struct urb *urb)
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{
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struct mdc800_data* mdc800=urb->context;
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int status = urb->status;
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if (status == 0) {
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/* Fill output buffer with these data */
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memcpy (mdc800->out, urb->transfer_buffer, 64);
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mdc800->out_count=64;
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mdc800->out_ptr=0;
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mdc800->download_left-=64;
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if (mdc800->download_left == 0)
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{
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mdc800->state=READY;
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}
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} else {
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dev_err(&mdc800->dev->dev,
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"request bytes fails (status:%i)\n", status);
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}
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mdc800->downloaded = 1;
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wake_up (&mdc800->download_wait);
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}
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/***************************************************************************
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Probing for the Camera
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***************************************************************************/
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static struct usb_driver mdc800_usb_driver;
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static const struct file_operations mdc800_device_ops;
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static struct usb_class_driver mdc800_class = {
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.name = "mdc800%d",
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.fops = &mdc800_device_ops,
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.minor_base = MDC800_DEVICE_MINOR_BASE,
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};
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/*
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* Callback to search the Mustek MDC800 on the USB Bus
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*/
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static int mdc800_usb_probe (struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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int i,j;
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struct usb_host_interface *intf_desc;
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struct usb_device *dev = interface_to_usbdev (intf);
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int irq_interval=0;
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int retval;
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dev_dbg(&intf->dev, "(%s) called.\n", __func__);
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if (mdc800->dev != NULL)
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{
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dev_warn(&intf->dev, "only one Mustek MDC800 is supported.\n");
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return -ENODEV;
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}
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if (dev->descriptor.bNumConfigurations != 1)
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{
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dev_err(&intf->dev,
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"probe fails -> wrong Number of Configuration\n");
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return -ENODEV;
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}
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intf_desc = intf->cur_altsetting;
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if (
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( intf_desc->desc.bInterfaceClass != 0xff )
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|| ( intf_desc->desc.bInterfaceSubClass != 0 )
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|| ( intf_desc->desc.bInterfaceProtocol != 0 )
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|| ( intf_desc->desc.bNumEndpoints != 4)
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)
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{
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dev_err(&intf->dev, "probe fails -> wrong Interface\n");
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return -ENODEV;
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}
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/* Check the Endpoints */
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for (i=0; i<4; i++)
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{
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mdc800->endpoint[i]=-1;
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for (j=0; j<4; j++)
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{
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if (mdc800_endpoint_equals (&intf_desc->endpoint [j].desc,&mdc800_ed [i]))
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{
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mdc800->endpoint[i]=intf_desc->endpoint [j].desc.bEndpointAddress ;
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if (i==1)
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{
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irq_interval=intf_desc->endpoint [j].desc.bInterval;
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}
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}
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}
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if (mdc800->endpoint[i] == -1)
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{
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dev_err(&intf->dev, "probe fails -> Wrong Endpoints.\n");
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return -ENODEV;
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}
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}
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|
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dev_info(&intf->dev, "Found Mustek MDC800 on USB.\n");
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mutex_lock(&mdc800->io_lock);
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retval = usb_register_dev(intf, &mdc800_class);
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if (retval) {
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dev_err(&intf->dev, "Not able to get a minor for this device.\n");
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mutex_unlock(&mdc800->io_lock);
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return -ENODEV;
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}
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mdc800->dev=dev;
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mdc800->open=0;
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/* Setup URB Structs */
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usb_fill_int_urb (
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mdc800->irq_urb,
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mdc800->dev,
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usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]),
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mdc800->irq_urb_buffer,
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8,
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mdc800_usb_irq,
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mdc800,
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irq_interval
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);
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usb_fill_bulk_urb (
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mdc800->write_urb,
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mdc800->dev,
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usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]),
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mdc800->write_urb_buffer,
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8,
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mdc800_usb_write_notify,
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mdc800
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);
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usb_fill_bulk_urb (
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mdc800->download_urb,
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mdc800->dev,
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usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]),
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mdc800->download_urb_buffer,
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64,
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mdc800_usb_download_notify,
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mdc800
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);
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mdc800->state=READY;
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|
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mutex_unlock(&mdc800->io_lock);
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|
|
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);
|
|
|
|
dev_dbg(&intf->dev, "(%s) called\n", __func__);
|
|
|
|
if (mdc800) {
|
|
if (mdc800->state == NOT_CONNECTED)
|
|
return;
|
|
|
|
usb_deregister_dev(intf, &mdc800_class);
|
|
|
|
/* must be under lock to make sure no URB
|
|
is submitted after usb_kill_urb() */
|
|
mutex_lock(&mdc800->io_lock);
|
|
mdc800->state=NOT_CONNECTED;
|
|
|
|
usb_kill_urb(mdc800->irq_urb);
|
|
usb_kill_urb(mdc800->write_urb);
|
|
usb_kill_urb(mdc800->download_urb);
|
|
mutex_unlock(&mdc800->io_lock);
|
|
|
|
mdc800->dev = NULL;
|
|
usb_set_intfdata(intf, NULL);
|
|
}
|
|
dev_info(&intf->dev, "Mustek MDC800 disconnected from USB.\n");
|
|
}
|
|
|
|
|
|
/***************************************************************************
|
|
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;
|
|
|
|
mutex_lock(&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;
|
|
retval = usb_submit_urb (mdc800->irq_urb, GFP_KERNEL);
|
|
if (retval) {
|
|
dev_err(&mdc800->dev->dev,
|
|
"request USB irq fails (submit_retval=%i).\n", retval);
|
|
errn = -EIO;
|
|
goto error_out;
|
|
}
|
|
|
|
mdc800->open=1;
|
|
dev_dbg(&mdc800->dev->dev, "Mustek MDC800 device opened.\n");
|
|
|
|
error_out:
|
|
mutex_unlock(&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;
|
|
|
|
mutex_lock(&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;
|
|
}
|
|
|
|
mutex_unlock(&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;
|
|
int retval;
|
|
|
|
mutex_lock(&mdc800->io_lock);
|
|
if (mdc800->state == NOT_CONNECTED)
|
|
{
|
|
mutex_unlock(&mdc800->io_lock);
|
|
return -EBUSY;
|
|
}
|
|
if (mdc800->state == WORKING)
|
|
{
|
|
printk(KERN_WARNING "mdc800: Illegal State \"working\""
|
|
"reached during read ?!\n");
|
|
mutex_unlock(&mdc800->io_lock);
|
|
return -EBUSY;
|
|
}
|
|
if (!mdc800->open)
|
|
{
|
|
mutex_unlock(&mdc800->io_lock);
|
|
return -EBUSY;
|
|
}
|
|
|
|
while (left)
|
|
{
|
|
if (signal_pending (current))
|
|
{
|
|
mutex_unlock(&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;
|
|
retval = usb_submit_urb (mdc800->download_urb, GFP_KERNEL);
|
|
if (retval) {
|
|
dev_err(&mdc800->dev->dev,
|
|
"Can't submit download urb "
|
|
"(retval=%i)\n", retval);
|
|
mutex_unlock(&mdc800->io_lock);
|
|
return len-left;
|
|
}
|
|
wait_event_timeout(mdc800->download_wait,
|
|
mdc800->downloaded,
|
|
msecs_to_jiffies(TO_DOWNLOAD_GET_READY));
|
|
mdc800->downloaded = 0;
|
|
if (mdc800->download_urb->status != 0)
|
|
{
|
|
dev_err(&mdc800->dev->dev,
|
|
"request download-bytes fails "
|
|
"(status=%i)\n",
|
|
mdc800->download_urb->status);
|
|
mutex_unlock(&mdc800->io_lock);
|
|
return len-left;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* No more bytes -> that's an error*/
|
|
mutex_unlock(&mdc800->io_lock);
|
|
return -EIO;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Copy Bytes */
|
|
if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr],
|
|
sts)) {
|
|
mutex_unlock(&mdc800->io_lock);
|
|
return -EFAULT;
|
|
}
|
|
ptr+=sts;
|
|
left-=sts;
|
|
mdc800->out_ptr+=sts;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&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;
|
|
int retval;
|
|
|
|
mutex_lock(&mdc800->io_lock);
|
|
if (mdc800->state != READY)
|
|
{
|
|
mutex_unlock(&mdc800->io_lock);
|
|
return -EBUSY;
|
|
}
|
|
if (!mdc800->open )
|
|
{
|
|
mutex_unlock(&mdc800->io_lock);
|
|
return -EBUSY;
|
|
}
|
|
|
|
while (i<len)
|
|
{
|
|
unsigned char c;
|
|
if (signal_pending (current))
|
|
{
|
|
mutex_unlock(&mdc800->io_lock);
|
|
return -EINTR;
|
|
}
|
|
|
|
if(get_user(c, buf+i))
|
|
{
|
|
mutex_unlock(&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
|
|
{
|
|
mutex_unlock(&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))
|
|
{
|
|
dev_err(&mdc800->dev->dev,
|
|
"Camera didn't get ready.\n");
|
|
mutex_unlock(&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;
|
|
retval = usb_submit_urb (mdc800->write_urb, GFP_KERNEL);
|
|
if (retval) {
|
|
dev_err(&mdc800->dev->dev,
|
|
"submitting write urb fails "
|
|
"(retval=%i)\n", retval);
|
|
mutex_unlock(&mdc800->io_lock);
|
|
return -EIO;
|
|
}
|
|
wait_event_timeout(mdc800->write_wait, mdc800->written,
|
|
msecs_to_jiffies(TO_WRITE_GET_READY));
|
|
mdc800->written = 0;
|
|
if (mdc800->state == WORKING)
|
|
{
|
|
usb_kill_urb(mdc800->write_urb);
|
|
mutex_unlock(&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)
|
|
{
|
|
dev_err(&mdc800->dev->dev,
|
|
"call 0x07 before "
|
|
"0x05,0x3e\n");
|
|
mdc800->state=READY;
|
|
mutex_unlock(&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))
|
|
{
|
|
dev_err(&mdc800->dev->dev, "requesting answer from irq fails\n");
|
|
mutex_unlock(&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];
|
|
|
|
dev_dbg(&mdc800->dev->dev, "cached imagesize = %i\n", mdc800->pic_len);
|
|
}
|
|
|
|
}
|
|
else
|
|
{
|
|
if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND))
|
|
{
|
|
dev_err(&mdc800->dev->dev, "Command Timeout.\n");
|
|
mutex_unlock(&mdc800->io_lock);
|
|
return -EIO;
|
|
}
|
|
}
|
|
mdc800->state=READY;
|
|
break;
|
|
}
|
|
}
|
|
i++;
|
|
}
|
|
mutex_unlock(&mdc800->io_lock);
|
|
return i;
|
|
}
|
|
|
|
|
|
/***************************************************************************
|
|
Init and Cleanup this driver (Structs and types)
|
|
****************************************************************************/
|
|
|
|
/* File Operations of this drivers */
|
|
static const 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,
|
|
.llseek = noop_llseek,
|
|
};
|
|
|
|
|
|
|
|
static const 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 =
|
|
{
|
|
.name = "mdc800",
|
|
.probe = mdc800_usb_probe,
|
|
.disconnect = mdc800_usb_disconnect,
|
|
.id_table = mdc800_table
|
|
};
|
|
|
|
|
|
|
|
/************************************************************************
|
|
Init and Cleanup this driver (Main Functions)
|
|
*************************************************************************/
|
|
|
|
static int __init usb_mdc800_init (void)
|
|
{
|
|
int retval = -ENODEV;
|
|
/* Allocate Memory */
|
|
mdc800=kzalloc (sizeof (struct mdc800_data), GFP_KERNEL);
|
|
if (!mdc800)
|
|
goto cleanup_on_fail;
|
|
|
|
mdc800->dev = NULL;
|
|
mdc800->state=NOT_CONNECTED;
|
|
mutex_init (&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;
|
|
|
|
mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL);
|
|
if (!mdc800->irq_urb_buffer)
|
|
goto cleanup_on_fail;
|
|
mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL);
|
|
if (!mdc800->write_urb_buffer)
|
|
goto cleanup_on_fail;
|
|
mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL);
|
|
if (!mdc800->download_urb_buffer)
|
|
goto cleanup_on_fail;
|
|
|
|
mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL);
|
|
if (!mdc800->irq_urb)
|
|
goto cleanup_on_fail;
|
|
mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL);
|
|
if (!mdc800->download_urb)
|
|
goto cleanup_on_fail;
|
|
mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL);
|
|
if (!mdc800->write_urb)
|
|
goto cleanup_on_fail;
|
|
|
|
/* Register the driver */
|
|
retval = usb_register(&mdc800_usb_driver);
|
|
if (retval)
|
|
goto cleanup_on_fail;
|
|
|
|
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
|
|
DRIVER_DESC "\n");
|
|
|
|
return 0;
|
|
|
|
/* Clean driver up, when something fails */
|
|
|
|
cleanup_on_fail:
|
|
|
|
if (mdc800 != NULL)
|
|
{
|
|
printk(KERN_ERR "mdc800: can't alloc memory!\n");
|
|
|
|
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");
|
|
|