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path: root/drivers/usb/image/mdc800.c
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Diffstat (limited to 'drivers/usb/image/mdc800.c')
-rw-r--r--drivers/usb/image/mdc800.c63
1 files changed, 32 insertions, 31 deletions
diff --git a/drivers/usb/image/mdc800.c b/drivers/usb/image/mdc800.c
index 4e3e4d048c1..08daf400f98 100644
--- a/drivers/usb/image/mdc800.c
+++ b/drivers/usb/image/mdc800.c
@@ -96,6 +96,7 @@
96#include <linux/module.h> 96#include <linux/module.h>
97#include <linux/smp_lock.h> 97#include <linux/smp_lock.h>
98#include <linux/wait.h> 98#include <linux/wait.h>
99#include <linux/mutex.h>
99 100
100#include <linux/usb.h> 101#include <linux/usb.h>
101#include <linux/fs.h> 102#include <linux/fs.h>
@@ -169,7 +170,7 @@ struct mdc800_data
169 int out_count; // Bytes in the buffer 170 int out_count; // Bytes in the buffer
170 171
171 int open; // Camera device open ? 172 int open; // Camera device open ?
172 struct semaphore io_lock; // IO -lock 173 struct mutex io_lock; // IO -lock
173 174
174 char in [8]; // Command Input Buffer 175 char in [8]; // Command Input Buffer
175 int in_count; 176 int in_count;
@@ -497,7 +498,7 @@ static int mdc800_usb_probe (struct usb_interface *intf,
497 498
498 info ("Found Mustek MDC800 on USB."); 499 info ("Found Mustek MDC800 on USB.");
499 500
500 down (&mdc800->io_lock); 501 mutex_lock(&mdc800->io_lock);
501 502
502 retval = usb_register_dev(intf, &mdc800_class); 503 retval = usb_register_dev(intf, &mdc800_class);
503 if (retval) { 504 if (retval) {
@@ -542,7 +543,7 @@ static int mdc800_usb_probe (struct usb_interface *intf,
542 543
543 mdc800->state=READY; 544 mdc800->state=READY;
544 545
545 up (&mdc800->io_lock); 546 mutex_unlock(&mdc800->io_lock);
546 547
547 usb_set_intfdata(intf, mdc800); 548 usb_set_intfdata(intf, mdc800);
548 return 0; 549 return 0;
@@ -620,7 +621,7 @@ static int mdc800_device_open (struct inode* inode, struct file *file)
620 int retval=0; 621 int retval=0;
621 int errn=0; 622 int errn=0;
622 623
623 down (&mdc800->io_lock); 624 mutex_lock(&mdc800->io_lock);
624 625
625 if (mdc800->state == NOT_CONNECTED) 626 if (mdc800->state == NOT_CONNECTED)
626 { 627 {
@@ -656,7 +657,7 @@ static int mdc800_device_open (struct inode* inode, struct file *file)
656 dbg ("Mustek MDC800 device opened."); 657 dbg ("Mustek MDC800 device opened.");
657 658
658error_out: 659error_out:
659 up (&mdc800->io_lock); 660 mutex_unlock(&mdc800->io_lock);
660 return errn; 661 return errn;
661} 662}
662 663
@@ -669,7 +670,7 @@ static int mdc800_device_release (struct inode* inode, struct file *file)
669 int retval=0; 670 int retval=0;
670 dbg ("Mustek MDC800 device closed."); 671 dbg ("Mustek MDC800 device closed.");
671 672
672 down (&mdc800->io_lock); 673 mutex_lock(&mdc800->io_lock);
673 if (mdc800->open && (mdc800->state != NOT_CONNECTED)) 674 if (mdc800->open && (mdc800->state != NOT_CONNECTED))
674 { 675 {
675 usb_kill_urb(mdc800->irq_urb); 676 usb_kill_urb(mdc800->irq_urb);
@@ -682,7 +683,7 @@ static int mdc800_device_release (struct inode* inode, struct file *file)
682 retval=-EIO; 683 retval=-EIO;
683 } 684 }
684 685
685 up(&mdc800->io_lock); 686 mutex_unlock(&mdc800->io_lock);
686 return retval; 687 return retval;
687} 688}
688 689
@@ -695,21 +696,21 @@ static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t l
695 size_t left=len, sts=len; /* single transfer size */ 696 size_t left=len, sts=len; /* single transfer size */
696 char __user *ptr = buf; 697 char __user *ptr = buf;
697 698
698 down (&mdc800->io_lock); 699 mutex_lock(&mdc800->io_lock);
699 if (mdc800->state == NOT_CONNECTED) 700 if (mdc800->state == NOT_CONNECTED)
700 { 701 {
701 up (&mdc800->io_lock); 702 mutex_unlock(&mdc800->io_lock);
702 return -EBUSY; 703 return -EBUSY;
703 } 704 }
704 if (mdc800->state == WORKING) 705 if (mdc800->state == WORKING)
705 { 706 {
706 warn ("Illegal State \"working\" reached during read ?!"); 707 warn ("Illegal State \"working\" reached during read ?!");
707 up (&mdc800->io_lock); 708 mutex_unlock(&mdc800->io_lock);
708 return -EBUSY; 709 return -EBUSY;
709 } 710 }
710 if (!mdc800->open) 711 if (!mdc800->open)
711 { 712 {
712 up (&mdc800->io_lock); 713 mutex_unlock(&mdc800->io_lock);
713 return -EBUSY; 714 return -EBUSY;
714 } 715 }
715 716
@@ -717,7 +718,7 @@ static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t l
717 { 718 {
718 if (signal_pending (current)) 719 if (signal_pending (current))
719 { 720 {
720 up (&mdc800->io_lock); 721 mutex_unlock(&mdc800->io_lock);
721 return -EINTR; 722 return -EINTR;
722 } 723 }
723 724
@@ -736,7 +737,7 @@ static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t l
736 if (usb_submit_urb (mdc800->download_urb, GFP_KERNEL)) 737 if (usb_submit_urb (mdc800->download_urb, GFP_KERNEL))
737 { 738 {
738 err ("Can't submit download urb (status=%i)",mdc800->download_urb->status); 739 err ("Can't submit download urb (status=%i)",mdc800->download_urb->status);
739 up (&mdc800->io_lock); 740 mutex_unlock(&mdc800->io_lock);
740 return len-left; 741 return len-left;
741 } 742 }
742 wait_event_timeout(mdc800->download_wait, mdc800->downloaded, 743 wait_event_timeout(mdc800->download_wait, mdc800->downloaded,
@@ -745,14 +746,14 @@ static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t l
745 if (mdc800->download_urb->status != 0) 746 if (mdc800->download_urb->status != 0)
746 { 747 {
747 err ("request download-bytes fails (status=%i)",mdc800->download_urb->status); 748 err ("request download-bytes fails (status=%i)",mdc800->download_urb->status);
748 up (&mdc800->io_lock); 749 mutex_unlock(&mdc800->io_lock);
749 return len-left; 750 return len-left;
750 } 751 }
751 } 752 }
752 else 753 else
753 { 754 {
754 /* No more bytes -> that's an error*/ 755 /* No more bytes -> that's an error*/
755 up (&mdc800->io_lock); 756 mutex_unlock(&mdc800->io_lock);
756 return -EIO; 757 return -EIO;
757 } 758 }
758 } 759 }
@@ -761,7 +762,7 @@ static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t l
761 /* Copy Bytes */ 762 /* Copy Bytes */
762 if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr], 763 if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr],
763 sts)) { 764 sts)) {
764 up(&mdc800->io_lock); 765 mutex_unlock(&mdc800->io_lock);
765 return -EFAULT; 766 return -EFAULT;
766 } 767 }
767 ptr+=sts; 768 ptr+=sts;
@@ -770,7 +771,7 @@ static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t l
770 } 771 }
771 } 772 }
772 773
773 up (&mdc800->io_lock); 774 mutex_unlock(&mdc800->io_lock);
774 return len-left; 775 return len-left;
775} 776}
776 777
@@ -785,15 +786,15 @@ static ssize_t mdc800_device_write (struct file *file, const char __user *buf, s
785{ 786{
786 size_t i=0; 787 size_t i=0;
787 788
788 down (&mdc800->io_lock); 789 mutex_lock(&mdc800->io_lock);
789 if (mdc800->state != READY) 790 if (mdc800->state != READY)
790 { 791 {
791 up (&mdc800->io_lock); 792 mutex_unlock(&mdc800->io_lock);
792 return -EBUSY; 793 return -EBUSY;
793 } 794 }
794 if (!mdc800->open ) 795 if (!mdc800->open )
795 { 796 {
796 up (&mdc800->io_lock); 797 mutex_unlock(&mdc800->io_lock);
797 return -EBUSY; 798 return -EBUSY;
798 } 799 }
799 800
@@ -802,13 +803,13 @@ static ssize_t mdc800_device_write (struct file *file, const char __user *buf, s
802 unsigned char c; 803 unsigned char c;
803 if (signal_pending (current)) 804 if (signal_pending (current))
804 { 805 {
805 up (&mdc800->io_lock); 806 mutex_unlock(&mdc800->io_lock);
806 return -EINTR; 807 return -EINTR;
807 } 808 }
808 809
809 if(get_user(c, buf+i)) 810 if(get_user(c, buf+i))
810 { 811 {
811 up(&mdc800->io_lock); 812 mutex_unlock(&mdc800->io_lock);
812 return -EFAULT; 813 return -EFAULT;
813 } 814 }
814 815
@@ -829,7 +830,7 @@ static ssize_t mdc800_device_write (struct file *file, const char __user *buf, s
829 } 830 }
830 else 831 else
831 { 832 {
832 up (&mdc800->io_lock); 833 mutex_unlock(&mdc800->io_lock);
833 return -EIO; 834 return -EIO;
834 } 835 }
835 836
@@ -841,7 +842,7 @@ static ssize_t mdc800_device_write (struct file *file, const char __user *buf, s
841 if (mdc800_usb_waitForIRQ (0,TO_GET_READY)) 842 if (mdc800_usb_waitForIRQ (0,TO_GET_READY))
842 { 843 {
843 err ("Camera didn't get ready.\n"); 844 err ("Camera didn't get ready.\n");
844 up (&mdc800->io_lock); 845 mutex_unlock(&mdc800->io_lock);
845 return -EIO; 846 return -EIO;
846 } 847 }
847 848
@@ -853,7 +854,7 @@ static ssize_t mdc800_device_write (struct file *file, const char __user *buf, s
853 if (usb_submit_urb (mdc800->write_urb, GFP_KERNEL)) 854 if (usb_submit_urb (mdc800->write_urb, GFP_KERNEL))
854 { 855 {
855 err ("submitting write urb fails (status=%i)", mdc800->write_urb->status); 856 err ("submitting write urb fails (status=%i)", mdc800->write_urb->status);
856 up (&mdc800->io_lock); 857 mutex_unlock(&mdc800->io_lock);
857 return -EIO; 858 return -EIO;
858 } 859 }
859 wait_event_timeout(mdc800->write_wait, mdc800->written, TO_WRITE_GET_READY*HZ/1000); 860 wait_event_timeout(mdc800->write_wait, mdc800->written, TO_WRITE_GET_READY*HZ/1000);
@@ -861,7 +862,7 @@ static ssize_t mdc800_device_write (struct file *file, const char __user *buf, s
861 if (mdc800->state == WORKING) 862 if (mdc800->state == WORKING)
862 { 863 {
863 usb_kill_urb(mdc800->write_urb); 864 usb_kill_urb(mdc800->write_urb);
864 up (&mdc800->io_lock); 865 mutex_unlock(&mdc800->io_lock);
865 return -EIO; 866 return -EIO;
866 } 867 }
867 868
@@ -873,7 +874,7 @@ static ssize_t mdc800_device_write (struct file *file, const char __user *buf, s
873 { 874 {
874 err ("call 0x07 before 0x05,0x3e"); 875 err ("call 0x07 before 0x05,0x3e");
875 mdc800->state=READY; 876 mdc800->state=READY;
876 up (&mdc800->io_lock); 877 mutex_unlock(&mdc800->io_lock);
877 return -EIO; 878 return -EIO;
878 } 879 }
879 mdc800->pic_len=-1; 880 mdc800->pic_len=-1;
@@ -892,7 +893,7 @@ static ssize_t mdc800_device_write (struct file *file, const char __user *buf, s
892 if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ)) 893 if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ))
893 { 894 {
894 err ("requesting answer from irq fails"); 895 err ("requesting answer from irq fails");
895 up (&mdc800->io_lock); 896 mutex_unlock(&mdc800->io_lock);
896 return -EIO; 897 return -EIO;
897 } 898 }
898 899
@@ -920,7 +921,7 @@ static ssize_t mdc800_device_write (struct file *file, const char __user *buf, s
920 if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND)) 921 if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND))
921 { 922 {
922 err ("Command Timeout."); 923 err ("Command Timeout.");
923 up (&mdc800->io_lock); 924 mutex_unlock(&mdc800->io_lock);
924 return -EIO; 925 return -EIO;
925 } 926 }
926 } 927 }
@@ -930,7 +931,7 @@ static ssize_t mdc800_device_write (struct file *file, const char __user *buf, s
930 } 931 }
931 i++; 932 i++;
932 } 933 }
933 up (&mdc800->io_lock); 934 mutex_unlock(&mdc800->io_lock);
934 return i; 935 return i;
935} 936}
936 937
@@ -984,7 +985,7 @@ static int __init usb_mdc800_init (void)
984 985
985 mdc800->dev = NULL; 986 mdc800->dev = NULL;
986 mdc800->state=NOT_CONNECTED; 987 mdc800->state=NOT_CONNECTED;
987 init_MUTEX (&mdc800->io_lock); 988 mutex_init (&mdc800->io_lock);
988 989
989 init_waitqueue_head (&mdc800->irq_wait); 990 init_waitqueue_head (&mdc800->irq_wait);
990 init_waitqueue_head (&mdc800->write_wait); 991 init_waitqueue_head (&mdc800->write_wait);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-27 06:24:13 -0500