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https://github.com/edk2-porting/linux-next.git
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USB: Add ADU support for Ontrak ADU devices
This patch adds support for Ontrak ADU USB devices. Fixed for printk issues by Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Steven Haigh <netwiz@crc.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Steven Haigh
Greg Kroah-Hartman
parent
8ac283ad41
commit
03270634e2
@ -2543,6 +2543,9 @@ Your cooperation is appreciated.
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64 = /dev/usb/rio500 Diamond Rio 500
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65 = /dev/usb/usblcd USBLCD Interface (info@usblcd.de)
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66 = /dev/usb/cpad0 Synaptics cPad (mouse/LCD)
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67 = /dev/usb/adutux0 1st Ontrak ADU device
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...
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76 = /dev/usb/adutux10 10th Ontrak ADU device
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96 = /dev/usb/hiddev0 1st USB HID device
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...
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111 = /dev/usb/hiddev15 16th USB HID device
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@ -63,6 +63,7 @@ obj-$(CONFIG_USB_USS720) += misc/
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obj-$(CONFIG_USB_PHIDGETSERVO) += misc/
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obj-$(CONFIG_USB_SISUSBVGA) += misc/
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obj-$(CONFIG_USB_APPLEDISPLAY) += misc/
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obj-$(CONFIG_USB_ADUTUX) += misc/
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obj-$(CONFIG_USB_ATM) += atm/
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obj-$(CONFIG_USB_SPEEDTOUCH) += atm/
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@ -1697,7 +1697,11 @@ static const struct hid_blacklist {
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{ USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS, HID_QUIRK_IGNORE },
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{ USB_VENDOR_ID_MGE, USB_DEVICE_ID_MGE_UPS1, HID_QUIRK_IGNORE },
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{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100, HID_QUIRK_IGNORE },
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{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 20, HID_QUIRK_IGNORE },
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{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 30, HID_QUIRK_IGNORE },
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{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 100, HID_QUIRK_IGNORE },
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{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 108, HID_QUIRK_IGNORE },
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{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 118, HID_QUIRK_IGNORE },
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{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 200, HID_QUIRK_IGNORE },
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{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 300, HID_QUIRK_IGNORE },
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{ USB_VENDOR_ID_ONTRAK, USB_DEVICE_ID_ONTRAK_ADU100 + 400, HID_QUIRK_IGNORE },
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@ -32,6 +32,16 @@ config USB_EMI26
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To compile this driver as a module, choose M here: the
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module will be called emi26.
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config USB_ADUTUX
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tristate "ADU devices from Ontrak Control Systems (EXPERIMENTAL)"
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depends on USB && EXPERIMENTAL
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help
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Say Y if you want to use an ADU device from Ontrak Control
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Systems.
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To compile this driver as a module, choose M here. The module
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will be called adutux.
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config USB_AUERSWALD
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tristate "USB Auerswald ISDN support (EXPERIMENTAL)"
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depends on USB && EXPERIMENTAL
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@ -3,6 +3,7 @@
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# (the ones that don't fit into any other categories)
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#
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obj-$(CONFIG_USB_ADUTUX) += adutux.o
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obj-$(CONFIG_USB_AUERSWALD) += auerswald.o
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obj-$(CONFIG_USB_CYPRESS_CY7C63)+= cypress_cy7c63.o
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obj-$(CONFIG_USB_CYTHERM) += cytherm.o
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900
drivers/usb/misc/adutux.c
Normal file
900
drivers/usb/misc/adutux.c
Normal file
@ -0,0 +1,900 @@
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/*
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* adutux - driver for ADU devices from Ontrak Control Systems
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* This is an experimental driver. Use at your own risk.
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* This driver is not supported by Ontrak Control Systems.
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*
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* Copyright (c) 2003 John Homppi (SCO, leave this notice here)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* derived from the Lego USB Tower driver 0.56:
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* Copyright (c) 2003 David Glance <davidgsf@sourceforge.net>
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* 2001 Juergen Stuber <stuber@loria.fr>
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* that was derived from USB Skeleton driver - 0.5
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* Copyright (c) 2001 Greg Kroah-Hartman (greg@kroah.com)
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*
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*/
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#include <linux/kernel.h>
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#include <linux/errno.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/usb.h>
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#include <asm/uaccess.h>
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#ifdef CONFIG_USB_DEBUG
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static int debug = 5;
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#else
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static int debug = 1;
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#endif
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/* Use our own dbg macro */
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#undef dbg
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#define dbg(lvl, format, arg...) \
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do { \
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if (debug >= lvl) \
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printk(KERN_DEBUG __FILE__ " : " format " \n", ## arg); \
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} while (0)
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/* Version Information */
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#define DRIVER_VERSION "v0.0.13"
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#define DRIVER_AUTHOR "John Homppi"
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#define DRIVER_DESC "adutux (see www.ontrak.net)"
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/* Module parameters */
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module_param(debug, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(debug, "Debug enabled or not");
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/* Define these values to match your device */
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#define ADU_VENDOR_ID 0x0a07
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#define ADU_PRODUCT_ID 0x0064
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/* table of devices that work with this driver */
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static struct usb_device_id device_table [] = {
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{ USB_DEVICE(ADU_VENDOR_ID, ADU_PRODUCT_ID) }, /* ADU100 */
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{ USB_DEVICE(ADU_VENDOR_ID, ADU_PRODUCT_ID+20) }, /* ADU120 */
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{ USB_DEVICE(ADU_VENDOR_ID, ADU_PRODUCT_ID+30) }, /* ADU130 */
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{ USB_DEVICE(ADU_VENDOR_ID, ADU_PRODUCT_ID+100) }, /* ADU200 */
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{ USB_DEVICE(ADU_VENDOR_ID, ADU_PRODUCT_ID+108) }, /* ADU208 */
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{ USB_DEVICE(ADU_VENDOR_ID, ADU_PRODUCT_ID+118) }, /* ADU218 */
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{ }/* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, device_table);
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#ifdef CONFIG_USB_DYNAMIC_MINORS
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#define ADU_MINOR_BASE 0
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#else
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#define ADU_MINOR_BASE 67
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#endif
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/* we can have up to this number of device plugged in at once */
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#define MAX_DEVICES 16
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#define COMMAND_TIMEOUT (2*HZ) /* 60 second timeout for a command */
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/* Structure to hold all of our device specific stuff */
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struct adu_device {
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struct semaphore sem; /* locks this structure */
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struct usb_device* udev; /* save off the usb device pointer */
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struct usb_interface* interface;
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unsigned char minor; /* the starting minor number for this device */
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char serial_number[8];
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int open_count; /* number of times this port has been opened */
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char* read_buffer_primary;
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int read_buffer_length;
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char* read_buffer_secondary;
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int secondary_head;
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int secondary_tail;
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spinlock_t buflock;
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wait_queue_head_t read_wait;
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wait_queue_head_t write_wait;
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char* interrupt_in_buffer;
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struct usb_endpoint_descriptor* interrupt_in_endpoint;
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struct urb* interrupt_in_urb;
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int read_urb_finished;
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char* interrupt_out_buffer;
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struct usb_endpoint_descriptor* interrupt_out_endpoint;
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struct urb* interrupt_out_urb;
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};
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/* prevent races between open() and disconnect */
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static DEFINE_MUTEX(disconnect_mutex);
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static struct usb_driver adu_driver;
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static void adu_debug_data(int level, const char *function, int size,
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const unsigned char *data)
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{
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int i;
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if (debug < level)
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return;
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printk(KERN_DEBUG __FILE__": %s - length = %d, data = ",
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function, size);
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for (i = 0; i < size; ++i)
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printk("%.2x ", data[i]);
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printk("\n");
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}
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/**
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* adu_abort_transfers
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* aborts transfers and frees associated data structures
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*/
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static void adu_abort_transfers(struct adu_device *dev)
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{
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dbg(2," %s : enter", __FUNCTION__);
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if (dev == NULL) {
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dbg(1," %s : dev is null", __FUNCTION__);
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goto exit;
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}
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if (dev->udev == NULL) {
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dbg(1," %s : udev is null", __FUNCTION__);
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goto exit;
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}
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dbg(2," %s : udev state %d", __FUNCTION__, dev->udev->state);
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if (dev->udev->state == USB_STATE_NOTATTACHED) {
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dbg(1," %s : udev is not attached", __FUNCTION__);
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goto exit;
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}
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/* shutdown transfer */
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usb_unlink_urb(dev->interrupt_in_urb);
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usb_unlink_urb(dev->interrupt_out_urb);
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exit:
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dbg(2," %s : leave", __FUNCTION__);
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}
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static void adu_delete(struct adu_device *dev)
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{
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dbg(2, "%s enter", __FUNCTION__);
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adu_abort_transfers(dev);
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/* free data structures */
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usb_free_urb(dev->interrupt_in_urb);
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usb_free_urb(dev->interrupt_out_urb);
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kfree(dev->read_buffer_primary);
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kfree(dev->read_buffer_secondary);
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kfree(dev->interrupt_in_buffer);
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kfree(dev->interrupt_out_buffer);
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kfree(dev);
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dbg(2, "%s : leave", __FUNCTION__);
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}
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static void adu_interrupt_in_callback(struct urb *urb, struct pt_regs *regs)
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{
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struct adu_device *dev = urb->context;
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dbg(4," %s : enter, status %d", __FUNCTION__, urb->status);
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adu_debug_data(5, __FUNCTION__, urb->actual_length,
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urb->transfer_buffer);
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spin_lock(&dev->buflock);
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if (urb->status != 0) {
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if ((urb->status != -ENOENT) && (urb->status != -ECONNRESET)) {
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dbg(1," %s : nonzero status received: %d",
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__FUNCTION__, urb->status);
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}
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goto exit;
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}
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if (urb->actual_length > 0 && dev->interrupt_in_buffer[0] != 0x00) {
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if (dev->read_buffer_length <
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(4 * le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize)) -
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(urb->actual_length)) {
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memcpy (dev->read_buffer_primary +
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dev->read_buffer_length,
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dev->interrupt_in_buffer, urb->actual_length);
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dev->read_buffer_length += urb->actual_length;
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dbg(2," %s reading %d ", __FUNCTION__,
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urb->actual_length);
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} else {
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dbg(1," %s : read_buffer overflow", __FUNCTION__);
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}
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}
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exit:
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dev->read_urb_finished = 1;
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spin_unlock(&dev->buflock);
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/* always wake up so we recover from errors */
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wake_up_interruptible(&dev->read_wait);
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adu_debug_data(5, __FUNCTION__, urb->actual_length,
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urb->transfer_buffer);
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dbg(4," %s : leave, status %d", __FUNCTION__, urb->status);
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}
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static void adu_interrupt_out_callback(struct urb *urb, struct pt_regs *regs)
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{
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struct adu_device *dev = urb->context;
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dbg(4," %s : enter, status %d", __FUNCTION__, urb->status);
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adu_debug_data(5,__FUNCTION__, urb->actual_length, urb->transfer_buffer);
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if (urb->status != 0) {
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if ((urb->status != -ENOENT) &&
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(urb->status != -ECONNRESET)) {
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dbg(1, " %s :nonzero status received: %d",
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__FUNCTION__, urb->status);
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}
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goto exit;
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}
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wake_up_interruptible(&dev->write_wait);
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exit:
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adu_debug_data(5, __FUNCTION__, urb->actual_length,
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urb->transfer_buffer);
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dbg(4," %s : leave, status %d", __FUNCTION__, urb->status);
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}
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static int adu_open(struct inode *inode, struct file *file)
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{
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struct adu_device *dev = NULL;
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struct usb_interface *interface;
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int subminor;
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int retval = 0;
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dbg(2,"%s : enter", __FUNCTION__);
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subminor = iminor(inode);
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mutex_lock(&disconnect_mutex);
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interface = usb_find_interface(&adu_driver, subminor);
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if (!interface) {
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err("%s - error, can't find device for minor %d",
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__FUNCTION__, subminor);
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retval = -ENODEV;
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goto exit_no_device;
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}
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dev = usb_get_intfdata(interface);
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if (!dev) {
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retval = -ENODEV;
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goto exit_no_device;
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}
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/* lock this device */
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if ((retval = down_interruptible(&dev->sem))) {
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dbg(2, "%s : sem down failed", __FUNCTION__);
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goto exit_no_device;
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}
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/* increment our usage count for the device */
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++dev->open_count;
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dbg(2,"%s : open count %d", __FUNCTION__, dev->open_count);
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/* save device in the file's private structure */
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file->private_data = dev;
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/* initialize in direction */
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dev->read_buffer_length = 0;
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/* fixup first read by having urb waiting for it */
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usb_fill_int_urb(dev->interrupt_in_urb,dev->udev,
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usb_rcvintpipe(dev->udev,
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dev->interrupt_in_endpoint->bEndpointAddress),
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dev->interrupt_in_buffer,
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le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize),
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adu_interrupt_in_callback, dev,
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dev->interrupt_in_endpoint->bInterval);
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/* dev->interrupt_in_urb->transfer_flags |= URB_ASYNC_UNLINK; */
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dev->read_urb_finished = 0;
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usb_submit_urb(dev->interrupt_in_urb, GFP_KERNEL);
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/* we ignore failure */
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/* end of fixup for first read */
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up(&dev->sem);
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exit_no_device:
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mutex_unlock(&disconnect_mutex);
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dbg(2,"%s : leave, return value %d ", __FUNCTION__, retval);
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return retval;
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}
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static int adu_release_internal(struct adu_device *dev)
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{
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int retval = 0;
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dbg(2," %s : enter", __FUNCTION__);
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if (dev->udev == NULL) {
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/* the device was unplugged before the file was released */
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adu_delete(dev);
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goto exit;
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}
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/* decrement our usage count for the device */
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--dev->open_count;
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dbg(2," %s : open count %d", __FUNCTION__, dev->open_count);
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if (dev->open_count <= 0) {
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adu_abort_transfers(dev);
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dev->open_count = 0;
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}
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exit:
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dbg(2," %s : leave", __FUNCTION__);
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return retval;
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}
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static int adu_release(struct inode *inode, struct file *file)
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{
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struct adu_device *dev = NULL;
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int retval = 0;
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dbg(2," %s : enter", __FUNCTION__);
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if (file == NULL) {
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dbg(1," %s : file is NULL", __FUNCTION__);
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retval = -ENODEV;
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goto exit;
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}
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dev = file->private_data;
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if (dev == NULL) {
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dbg(1," %s : object is NULL", __FUNCTION__);
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retval = -ENODEV;
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goto exit;
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}
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/* lock our device */
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down(&dev->sem); /* not interruptible */
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if (dev->open_count <= 0) {
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dbg(1," %s : device not opened", __FUNCTION__);
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retval = -ENODEV;
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goto exit;
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}
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/* do the work */
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retval = adu_release_internal(dev);
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exit:
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up(&dev->sem);
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dbg(2," %s : leave, return value %d", __FUNCTION__, retval);
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return retval;
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}
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static ssize_t adu_read(struct file *file, __user char *buffer, size_t count,
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loff_t *ppos)
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{
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struct adu_device *dev;
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size_t bytes_read = 0;
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size_t bytes_to_read = count;
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int i;
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int retval = 0;
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int timeout = 0;
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int should_submit = 0;
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unsigned long flags;
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DECLARE_WAITQUEUE(wait, current);
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dbg(2," %s : enter, count = %Zd, file=%p", __FUNCTION__, count, file);
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|
||||
dev = file->private_data;
|
||||
dbg(2," %s : dev=%p", __FUNCTION__, dev);
|
||||
/* lock this object */
|
||||
if (down_interruptible(&dev->sem))
|
||||
return -ERESTARTSYS;
|
||||
|
||||
/* verify that the device wasn't unplugged */
|
||||
if (dev->udev == NULL || dev->minor == 0) {
|
||||
retval = -ENODEV;
|
||||
err("No device or device unplugged %d", retval);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/* verify that some data was requested */
|
||||
if (count == 0) {
|
||||
dbg(1," %s : read request of 0 bytes", __FUNCTION__);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
timeout = COMMAND_TIMEOUT;
|
||||
dbg(2," %s : about to start looping", __FUNCTION__);
|
||||
while (bytes_to_read) {
|
||||
int data_in_secondary = dev->secondary_tail - dev->secondary_head;
|
||||
dbg(2," %s : while, data_in_secondary=%d, status=%d",
|
||||
__FUNCTION__, data_in_secondary,
|
||||
dev->interrupt_in_urb->status);
|
||||
|
||||
if (data_in_secondary) {
|
||||
/* drain secondary buffer */
|
||||
int amount = bytes_to_read < data_in_secondary ? bytes_to_read : data_in_secondary;
|
||||
i = copy_to_user(buffer, dev->read_buffer_secondary+dev->secondary_head, amount);
|
||||
if (i < 0) {
|
||||
retval = -EFAULT;
|
||||
goto exit;
|
||||
}
|
||||
dev->secondary_head += (amount - i);
|
||||
bytes_read += (amount - i);
|
||||
bytes_to_read -= (amount - i);
|
||||
if (i) {
|
||||
retval = bytes_read ? bytes_read : -EFAULT;
|
||||
goto exit;
|
||||
}
|
||||
} else {
|
||||
/* we check the primary buffer */
|
||||
spin_lock_irqsave (&dev->buflock, flags);
|
||||
if (dev->read_buffer_length) {
|
||||
/* we secure access to the primary */
|
||||
char *tmp;
|
||||
dbg(2," %s : swap, read_buffer_length = %d",
|
||||
__FUNCTION__, dev->read_buffer_length);
|
||||
tmp = dev->read_buffer_secondary;
|
||||
dev->read_buffer_secondary = dev->read_buffer_primary;
|
||||
dev->read_buffer_primary = tmp;
|
||||
dev->secondary_head = 0;
|
||||
dev->secondary_tail = dev->read_buffer_length;
|
||||
dev->read_buffer_length = 0;
|
||||
spin_unlock_irqrestore(&dev->buflock, flags);
|
||||
/* we have a free buffer so use it */
|
||||
should_submit = 1;
|
||||
} else {
|
||||
/* even the primary was empty - we may need to do IO */
|
||||
if (dev->interrupt_in_urb->status == -EINPROGRESS) {
|
||||
/* somebody is doing IO */
|
||||
spin_unlock_irqrestore(&dev->buflock, flags);
|
||||
dbg(2," %s : submitted already", __FUNCTION__);
|
||||
} else {
|
||||
/* we must initiate input */
|
||||
dbg(2," %s : initiate input", __FUNCTION__);
|
||||
dev->read_urb_finished = 0;
|
||||
|
||||
usb_fill_int_urb(dev->interrupt_in_urb,dev->udev,
|
||||
usb_rcvintpipe(dev->udev,
|
||||
dev->interrupt_in_endpoint->bEndpointAddress),
|
||||
dev->interrupt_in_buffer,
|
||||
le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize),
|
||||
adu_interrupt_in_callback,
|
||||
dev,
|
||||
dev->interrupt_in_endpoint->bInterval);
|
||||
retval = usb_submit_urb(dev->interrupt_in_urb, GFP_KERNEL);
|
||||
if (!retval) {
|
||||
spin_unlock_irqrestore(&dev->buflock, flags);
|
||||
dbg(2," %s : submitted OK", __FUNCTION__);
|
||||
} else {
|
||||
if (retval == -ENOMEM) {
|
||||
retval = bytes_read ? bytes_read : -ENOMEM;
|
||||
}
|
||||
spin_unlock_irqrestore(&dev->buflock, flags);
|
||||
dbg(2," %s : submit failed", __FUNCTION__);
|
||||
goto exit;
|
||||
}
|
||||
}
|
||||
|
||||
/* we wait for I/O to complete */
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
add_wait_queue(&dev->read_wait, &wait);
|
||||
if (!dev->read_urb_finished)
|
||||
timeout = schedule_timeout(COMMAND_TIMEOUT);
|
||||
else
|
||||
set_current_state(TASK_RUNNING);
|
||||
remove_wait_queue(&dev->read_wait, &wait);
|
||||
|
||||
if (timeout <= 0) {
|
||||
dbg(2," %s : timeout", __FUNCTION__);
|
||||
retval = bytes_read ? bytes_read : -ETIMEDOUT;
|
||||
goto exit;
|
||||
}
|
||||
|
||||
if (signal_pending(current)) {
|
||||
dbg(2," %s : signal pending", __FUNCTION__);
|
||||
retval = bytes_read ? bytes_read : -EINTR;
|
||||
goto exit;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
retval = bytes_read;
|
||||
/* if the primary buffer is empty then use it */
|
||||
if (should_submit && !dev->interrupt_in_urb->status==-EINPROGRESS) {
|
||||
usb_fill_int_urb(dev->interrupt_in_urb,dev->udev,
|
||||
usb_rcvintpipe(dev->udev,
|
||||
dev->interrupt_in_endpoint->bEndpointAddress),
|
||||
dev->interrupt_in_buffer,
|
||||
le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize),
|
||||
adu_interrupt_in_callback,
|
||||
dev,
|
||||
dev->interrupt_in_endpoint->bInterval);
|
||||
/* dev->interrupt_in_urb->transfer_flags |= URB_ASYNC_UNLINK; */
|
||||
dev->read_urb_finished = 0;
|
||||
usb_submit_urb(dev->interrupt_in_urb, GFP_KERNEL);
|
||||
/* we ignore failure */
|
||||
}
|
||||
|
||||
exit:
|
||||
/* unlock the device */
|
||||
up(&dev->sem);
|
||||
|
||||
dbg(2," %s : leave, return value %d", __FUNCTION__, retval);
|
||||
return retval;
|
||||
}
|
||||
|
||||
static ssize_t adu_write(struct file *file, const __user char *buffer,
|
||||
size_t count, loff_t *ppos)
|
||||
{
|
||||
struct adu_device *dev;
|
||||
size_t bytes_written = 0;
|
||||
size_t bytes_to_write;
|
||||
size_t buffer_size;
|
||||
int retval = 0;
|
||||
int timeout = 0;
|
||||
|
||||
dbg(2," %s : enter, count = %Zd", __FUNCTION__, count);
|
||||
|
||||
dev = file->private_data;
|
||||
|
||||
/* lock this object */
|
||||
down_interruptible(&dev->sem);
|
||||
|
||||
/* verify that the device wasn't unplugged */
|
||||
if (dev->udev == NULL || dev->minor == 0) {
|
||||
retval = -ENODEV;
|
||||
err("No device or device unplugged %d", retval);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/* verify that we actually have some data to write */
|
||||
if (count == 0) {
|
||||
dbg(1," %s : write request of 0 bytes", __FUNCTION__);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
|
||||
while (count > 0) {
|
||||
if (dev->interrupt_out_urb->status == -EINPROGRESS) {
|
||||
timeout = COMMAND_TIMEOUT;
|
||||
|
||||
while (timeout > 0) {
|
||||
if (signal_pending(current)) {
|
||||
dbg(1," %s : interrupted", __FUNCTION__);
|
||||
retval = -EINTR;
|
||||
goto exit;
|
||||
}
|
||||
up(&dev->sem);
|
||||
timeout = interruptible_sleep_on_timeout(&dev->write_wait, timeout);
|
||||
down_interruptible(&dev->sem);
|
||||
if (timeout > 0) {
|
||||
break;
|
||||
}
|
||||
dbg(1," %s : interrupted timeout: %d", __FUNCTION__, timeout);
|
||||
}
|
||||
|
||||
|
||||
dbg(1," %s : final timeout: %d", __FUNCTION__, timeout);
|
||||
|
||||
if (timeout == 0) {
|
||||
dbg(1, "%s - command timed out.", __FUNCTION__);
|
||||
retval = -ETIMEDOUT;
|
||||
goto exit;
|
||||
}
|
||||
|
||||
dbg(4," %s : in progress, count = %Zd", __FUNCTION__, count);
|
||||
|
||||
} else {
|
||||
dbg(4," %s : sending, count = %Zd", __FUNCTION__, count);
|
||||
|
||||
/* write the data into interrupt_out_buffer from userspace */
|
||||
buffer_size = le16_to_cpu(dev->interrupt_out_endpoint->wMaxPacketSize);
|
||||
bytes_to_write = count > buffer_size ? buffer_size : count;
|
||||
dbg(4," %s : buffer_size = %Zd, count = %Zd, bytes_to_write = %Zd",
|
||||
__FUNCTION__, buffer_size, count, bytes_to_write);
|
||||
|
||||
if (copy_from_user(dev->interrupt_out_buffer, buffer, bytes_to_write) != 0) {
|
||||
retval = -EFAULT;
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/* send off the urb */
|
||||
usb_fill_int_urb(
|
||||
dev->interrupt_out_urb,
|
||||
dev->udev,
|
||||
usb_sndintpipe(dev->udev, dev->interrupt_out_endpoint->bEndpointAddress),
|
||||
dev->interrupt_out_buffer,
|
||||
bytes_to_write,
|
||||
adu_interrupt_out_callback,
|
||||
dev,
|
||||
dev->interrupt_in_endpoint->bInterval);
|
||||
/* dev->interrupt_in_urb->transfer_flags |= URB_ASYNC_UNLINK; */
|
||||
dev->interrupt_out_urb->actual_length = bytes_to_write;
|
||||
retval = usb_submit_urb(dev->interrupt_out_urb, GFP_KERNEL);
|
||||
if (retval < 0) {
|
||||
err("Couldn't submit interrupt_out_urb %d", retval);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
buffer += bytes_to_write;
|
||||
count -= bytes_to_write;
|
||||
|
||||
bytes_written += bytes_to_write;
|
||||
}
|
||||
}
|
||||
|
||||
retval = bytes_written;
|
||||
|
||||
exit:
|
||||
/* unlock the device */
|
||||
up(&dev->sem);
|
||||
|
||||
dbg(2," %s : leave, return value %d", __FUNCTION__, retval);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
/* file operations needed when we register this driver */
|
||||
static struct file_operations adu_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.read = adu_read,
|
||||
.write = adu_write,
|
||||
.open = adu_open,
|
||||
.release = adu_release,
|
||||
};
|
||||
|
||||
/*
|
||||
* usb class driver info in order to get a minor number from the usb core,
|
||||
* and to have the device registered with devfs and the driver core
|
||||
*/
|
||||
static struct usb_class_driver adu_class = {
|
||||
.name = "usb/adutux%d",
|
||||
.fops = &adu_fops,
|
||||
.minor_base = ADU_MINOR_BASE,
|
||||
};
|
||||
|
||||
/**
|
||||
* adu_probe
|
||||
*
|
||||
* Called by the usb core when a new device is connected that it thinks
|
||||
* this driver might be interested in.
|
||||
*/
|
||||
static int adu_probe(struct usb_interface *interface,
|
||||
const struct usb_device_id *id)
|
||||
{
|
||||
struct usb_device *udev = interface_to_usbdev(interface);
|
||||
struct adu_device *dev = NULL;
|
||||
struct usb_host_interface *iface_desc;
|
||||
struct usb_endpoint_descriptor *endpoint;
|
||||
int retval = -ENODEV;
|
||||
int in_end_size;
|
||||
int out_end_size;
|
||||
int i;
|
||||
|
||||
dbg(2," %s : enter", __FUNCTION__);
|
||||
|
||||
if (udev == NULL) {
|
||||
dev_err(&interface->dev, "udev is NULL.\n");
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/* allocate memory for our device state and intialize it */
|
||||
dev = kzalloc(sizeof(struct adu_device), GFP_KERNEL);
|
||||
if (dev == NULL) {
|
||||
dev_err(&interface->dev, "Out of memory\n");
|
||||
retval = -ENOMEM;
|
||||
goto exit;
|
||||
}
|
||||
|
||||
init_MUTEX(&dev->sem);
|
||||
spin_lock_init(&dev->buflock);
|
||||
dev->udev = udev;
|
||||
init_waitqueue_head(&dev->read_wait);
|
||||
init_waitqueue_head(&dev->write_wait);
|
||||
|
||||
iface_desc = &interface->altsetting[0];
|
||||
|
||||
/* set up the endpoint information */
|
||||
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
|
||||
endpoint = &iface_desc->endpoint[i].desc;
|
||||
|
||||
if (usb_endpoint_is_int_in(endpoint))
|
||||
dev->interrupt_in_endpoint = endpoint;
|
||||
|
||||
if (usb_endpoint_is_int_out(endpoint))
|
||||
dev->interrupt_out_endpoint = endpoint;
|
||||
}
|
||||
if (dev->interrupt_in_endpoint == NULL) {
|
||||
dev_err(&interface->dev, "interrupt in endpoint not found\n");
|
||||
goto error;
|
||||
}
|
||||
if (dev->interrupt_out_endpoint == NULL) {
|
||||
dev_err(&interface->dev, "interrupt out endpoint not found\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
in_end_size = le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize);
|
||||
out_end_size = le16_to_cpu(dev->interrupt_out_endpoint->wMaxPacketSize);
|
||||
|
||||
dev->read_buffer_primary = kmalloc((4 * in_end_size), GFP_KERNEL);
|
||||
if (!dev->read_buffer_primary) {
|
||||
dev_err(&interface->dev, "Couldn't allocate read_buffer_primary\n");
|
||||
retval = -ENOMEM;
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* debug code prime the buffer */
|
||||
memset(dev->read_buffer_primary, 'a', in_end_size);
|
||||
memset(dev->read_buffer_primary + in_end_size, 'b', in_end_size);
|
||||
memset(dev->read_buffer_primary + (2 * in_end_size), 'c', in_end_size);
|
||||
memset(dev->read_buffer_primary + (3 * in_end_size), 'd', in_end_size);
|
||||
|
||||
dev->read_buffer_secondary = kmalloc((4 * in_end_size), GFP_KERNEL);
|
||||
if (!dev->read_buffer_secondary) {
|
||||
dev_err(&interface->dev, "Couldn't allocate read_buffer_secondary\n");
|
||||
retval = -ENOMEM;
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* debug code prime the buffer */
|
||||
memset(dev->read_buffer_secondary, 'e', in_end_size);
|
||||
memset(dev->read_buffer_secondary + in_end_size, 'f', in_end_size);
|
||||
memset(dev->read_buffer_secondary + (2 * in_end_size), 'g', in_end_size);
|
||||
memset(dev->read_buffer_secondary + (3 * in_end_size), 'h', in_end_size);
|
||||
|
||||
dev->interrupt_in_buffer = kmalloc(in_end_size, GFP_KERNEL);
|
||||
if (!dev->interrupt_in_buffer) {
|
||||
dev_err(&interface->dev, "Couldn't allocate interrupt_in_buffer\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* debug code prime the buffer */
|
||||
memset(dev->interrupt_in_buffer, 'i', in_end_size);
|
||||
|
||||
dev->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
|
||||
if (!dev->interrupt_in_urb) {
|
||||
dev_err(&interface->dev, "Couldn't allocate interrupt_in_urb\n");
|
||||
goto error;
|
||||
}
|
||||
dev->interrupt_out_buffer = kmalloc(out_end_size, GFP_KERNEL);
|
||||
if (!dev->interrupt_out_buffer) {
|
||||
dev_err(&interface->dev, "Couldn't allocate interrupt_out_buffer\n");
|
||||
goto error;
|
||||
}
|
||||
dev->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL);
|
||||
if (!dev->interrupt_out_urb) {
|
||||
dev_err(&interface->dev, "Couldn't allocate interrupt_out_urb\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
if (!usb_string(udev, udev->descriptor.iSerialNumber, dev->serial_number,
|
||||
sizeof(dev->serial_number))) {
|
||||
dev_err(&interface->dev, "Could not retrieve serial number\n");
|
||||
goto error;
|
||||
}
|
||||
dbg(2," %s : serial_number=%s", __FUNCTION__, dev->serial_number);
|
||||
|
||||
/* we can register the device now, as it is ready */
|
||||
usb_set_intfdata(interface, dev);
|
||||
|
||||
retval = usb_register_dev(interface, &adu_class);
|
||||
|
||||
if (retval) {
|
||||
/* something prevented us from registering this driver */
|
||||
dev_err(&interface->dev, "Not able to get a minor for this device.\n");
|
||||
usb_set_intfdata(interface, NULL);
|
||||
goto error;
|
||||
}
|
||||
|
||||
dev->minor = interface->minor;
|
||||
|
||||
/* let the user know what node this device is now attached to */
|
||||
dev_info(&interface->dev, "ADU%d %s now attached to /dev/usb/adutux%d",
|
||||
udev->descriptor.idProduct, dev->serial_number,
|
||||
(dev->minor - ADU_MINOR_BASE));
|
||||
exit:
|
||||
dbg(2," %s : leave, return value %p (dev)", __FUNCTION__, dev);
|
||||
|
||||
return retval;
|
||||
|
||||
error:
|
||||
adu_delete(dev);
|
||||
return retval;
|
||||
}
|
||||
|
||||
/**
|
||||
* adu_disconnect
|
||||
*
|
||||
* Called by the usb core when the device is removed from the system.
|
||||
*/
|
||||
static void adu_disconnect(struct usb_interface *interface)
|
||||
{
|
||||
struct adu_device *dev;
|
||||
int minor;
|
||||
|
||||
dbg(2," %s : enter", __FUNCTION__);
|
||||
|
||||
mutex_lock(&disconnect_mutex); /* not interruptible */
|
||||
|
||||
dev = usb_get_intfdata(interface);
|
||||
usb_set_intfdata(interface, NULL);
|
||||
|
||||
down(&dev->sem); /* not interruptible */
|
||||
|
||||
minor = dev->minor;
|
||||
|
||||
/* give back our minor */
|
||||
usb_deregister_dev(interface, &adu_class);
|
||||
dev->minor = 0;
|
||||
|
||||
/* if the device is not opened, then we clean up right now */
|
||||
dbg(2," %s : open count %d", __FUNCTION__, dev->open_count);
|
||||
if (!dev->open_count) {
|
||||
up(&dev->sem);
|
||||
adu_delete(dev);
|
||||
} else {
|
||||
dev->udev = NULL;
|
||||
up(&dev->sem);
|
||||
}
|
||||
|
||||
mutex_unlock(&disconnect_mutex);
|
||||
|
||||
dev_info(&interface->dev, "ADU device adutux%d now disconnected",
|
||||
(minor - ADU_MINOR_BASE));
|
||||
|
||||
dbg(2," %s : leave", __FUNCTION__);
|
||||
}
|
||||
|
||||
/* usb specific object needed to register this driver with the usb subsystem */
|
||||
static struct usb_driver adu_driver = {
|
||||
.name = "adutux",
|
||||
.probe = adu_probe,
|
||||
.disconnect = adu_disconnect,
|
||||
.id_table = device_table,
|
||||
};
|
||||
|
||||
static int __init adu_init(void)
|
||||
{
|
||||
int result;
|
||||
|
||||
dbg(2," %s : enter", __FUNCTION__);
|
||||
|
||||
/* register this driver with the USB subsystem */
|
||||
result = usb_register(&adu_driver);
|
||||
if (result < 0) {
|
||||
err("usb_register failed for the "__FILE__" driver. "
|
||||
"Error number %d", result);
|
||||
goto exit;
|
||||
}
|
||||
|
||||
info("adutux " DRIVER_DESC " " DRIVER_VERSION);
|
||||
info("adutux is an experimental driver. Use at your own risk");
|
||||
|
||||
exit:
|
||||
dbg(2," %s : leave, return value %d", __FUNCTION__, result);
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
static void __exit adu_exit(void)
|
||||
{
|
||||
dbg(2," %s : enter", __FUNCTION__);
|
||||
/* deregister this driver with the USB subsystem */
|
||||
usb_deregister(&adu_driver);
|
||||
dbg(2," %s : leave", __FUNCTION__);
|
||||
}
|
||||
|
||||
module_init(adu_init);
|
||||
module_exit(adu_exit);
|
||||
|
||||
MODULE_AUTHOR(DRIVER_AUTHOR);
|
||||
MODULE_DESCRIPTION(DRIVER_DESC);
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user