1946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* 2946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * Native support for the I/O-Warrior USB devices 3946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * 4946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * Copyright (c) 2003-2005 Code Mercenaries GmbH 5946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * written by Christian Lucht <lucht@codemercs.com> 6946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * 7946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * based on 8946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 9946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * usb-skeleton.c by Greg Kroah-Hartman <greg@kroah.com> 10946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * brlvger.c by Stephane Dalton <sdalton@videotron.ca> 11946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * and St�hane Doyon <s.doyon@videotron.ca> 12946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * 13946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * Released under the GPLv2. 14946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 15946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 16946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#include <linux/module.h> 17946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#include <linux/usb.h> 18946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#include <linux/init.h> 19946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#include <linux/slab.h> 20946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#include <linux/sched.h> 21925ce689bb31960c839804c19ef38d676f1939b9Arnd Bergmann#include <linux/mutex.h> 22946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#include <linux/poll.h> 23946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#include <linux/usb/iowarrior.h> 24946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 25946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* Version Information */ 26946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define DRIVER_VERSION "v0.4.0" 27946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define DRIVER_AUTHOR "Christian Lucht <lucht@codemercs.com>" 28946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define DRIVER_DESC "USB IO-Warrior driver (Linux 2.6.x)" 29946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 30946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define USB_VENDOR_ID_CODEMERCS 1984 31946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* low speed iowarrior */ 32946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define USB_DEVICE_ID_CODEMERCS_IOW40 0x1500 33946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define USB_DEVICE_ID_CODEMERCS_IOW24 0x1501 34946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define USB_DEVICE_ID_CODEMERCS_IOWPV1 0x1511 35946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define USB_DEVICE_ID_CODEMERCS_IOWPV2 0x1512 36946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* full speed iowarrior */ 37946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define USB_DEVICE_ID_CODEMERCS_IOW56 0x1503 38946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 39946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* Get a minor range for your devices from the usb maintainer */ 40946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#ifdef CONFIG_USB_DYNAMIC_MINORS 41946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define IOWARRIOR_MINOR_BASE 0 42946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#else 4325985edcedea6396277003854657b5f3cb31a628Lucas De Marchi#define IOWARRIOR_MINOR_BASE 208 // SKELETON_MINOR_BASE 192 + 16, not official yet 44946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#endif 45946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 46946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* interrupt input queue size */ 47946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define MAX_INTERRUPT_BUFFER 16 48946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* 49946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman maximum number of urbs that are submitted for writes at the same time, 50946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman this applies to the IOWarrior56 only! 51946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman IOWarrior24 and IOWarrior40 use synchronous usb_control_msg calls. 52946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman*/ 53946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define MAX_WRITES_IN_FLIGHT 4 54946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 55946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* Use our own dbg macro */ 56946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#undef dbg 57946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define dbg( format, arg... ) do { if( debug ) printk( KERN_DEBUG __FILE__ ": " format "\n" , ## arg ); } while ( 0 ) 58946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 59946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-HartmanMODULE_AUTHOR(DRIVER_AUTHOR); 60946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-HartmanMODULE_DESCRIPTION(DRIVER_DESC); 61946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-HartmanMODULE_LICENSE("GPL"); 62946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 63946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* Module parameters */ 64925ce689bb31960c839804c19ef38d676f1939b9Arnd Bergmannstatic DEFINE_MUTEX(iowarrior_mutex); 6590ab5ee94171b3e28de6bb42ee30b527014e0be7Rusty Russellstatic bool debug = 0; 66946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanmodule_param(debug, bool, 0644); 67946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-HartmanMODULE_PARM_DESC(debug, "debug=1 enables debugging messages"); 68946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 69946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic struct usb_driver iowarrior_driver; 7003f36e885fc26cb0ea299fb6df5171a51e814548Oliver Neukumstatic DEFINE_MUTEX(iowarrior_open_disc_lock); 71946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 72946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/*--------------*/ 73946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* data */ 74946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/*--------------*/ 75946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 76946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* Structure to hold all of our device specific stuff */ 77946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstruct iowarrior { 78946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct mutex mutex; /* locks this structure */ 79946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct usb_device *udev; /* save off the usb device pointer */ 80946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct usb_interface *interface; /* the interface for this device */ 81946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman unsigned char minor; /* the starting minor number for this device */ 82946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct usb_endpoint_descriptor *int_out_endpoint; /* endpoint for reading (needed for IOW56 only) */ 83946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct usb_endpoint_descriptor *int_in_endpoint; /* endpoint for reading */ 84946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct urb *int_in_urb; /* the urb for reading data */ 85946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman unsigned char *int_in_buffer; /* buffer for data to be read */ 86946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman unsigned char serial_number; /* to detect lost packages */ 87946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman unsigned char *read_queue; /* size is MAX_INTERRUPT_BUFFER * packet size */ 88946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman wait_queue_head_t read_wait; 89946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman wait_queue_head_t write_wait; /* wait-queue for writing to the device */ 90946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_t write_busy; /* number of write-urbs submitted */ 91946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_t read_idx; 92946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_t intr_idx; 93946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman spinlock_t intr_idx_lock; /* protects intr_idx */ 94946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_t overflow_flag; /* signals an index 'rollover' */ 95946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int present; /* this is 1 as long as the device is connected */ 96946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int opened; /* this is 1 if the device is currently open */ 97946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman char chip_serial[9]; /* the serial number string of the chip connected */ 98946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int report_size; /* number of bytes in a report */ 99946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman u16 product_id; 100946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman}; 101946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 102946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/*--------------*/ 103946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* globals */ 104946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/*--------------*/ 105946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 106946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* 107946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * USB spec identifies 5 second timeouts. 108946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 109946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define GET_TIMEOUT 5 110946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define USB_REQ_GET_REPORT 0x01 111946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman//#if 0 112946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic int usb_get_report(struct usb_device *dev, 113946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct usb_host_interface *inter, unsigned char type, 114946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman unsigned char id, void *buf, int size) 115946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman{ 116946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 117946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman USB_REQ_GET_REPORT, 118946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman USB_DIR_IN | USB_TYPE_CLASS | 119946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman USB_RECIP_INTERFACE, (type << 8) + id, 120946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman inter->desc.bInterfaceNumber, buf, size, 121147c5a17338fc72a89452f0a6c14ae6fcf853919Eberhard Fahle GET_TIMEOUT*HZ); 122946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman} 123946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman//#endif 124946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 125946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman#define USB_REQ_SET_REPORT 0x09 126946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 127946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic int usb_set_report(struct usb_interface *intf, unsigned char type, 128946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman unsigned char id, void *buf, int size) 129946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman{ 130946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return usb_control_msg(interface_to_usbdev(intf), 131946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_sndctrlpipe(interface_to_usbdev(intf), 0), 132946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman USB_REQ_SET_REPORT, 133946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman USB_TYPE_CLASS | USB_RECIP_INTERFACE, 134946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman (type << 8) + id, 135946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman intf->cur_altsetting->desc.bInterfaceNumber, buf, 136147c5a17338fc72a89452f0a6c14ae6fcf853919Eberhard Fahle size, HZ); 137946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman} 138946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 139946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/*---------------------*/ 140946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* driver registration */ 141946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/*---------------------*/ 142946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* table of devices that work with this driver */ 14333b9e16243fd69493be3ddda7be73226c8be586aNémeth Mártonstatic const struct usb_device_id iowarrior_ids[] = { 144946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW40)}, 145946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW24)}, 146946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOWPV1)}, 147946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOWPV2)}, 148946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW56)}, 149946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman {} /* Terminating entry */ 150946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman}; 151946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-HartmanMODULE_DEVICE_TABLE(usb, iowarrior_ids); 152946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 153946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* 154946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * USB callback handler for reading data 155946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 156946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic void iowarrior_callback(struct urb *urb) 157946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman{ 158cdc97792289179974af6dda781c855696358d307Ming Lei struct iowarrior *dev = urb->context; 159946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int intr_idx; 160946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int read_idx; 161946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int aux_idx; 162946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int offset; 163fb3abee69de583180348b9029378e31574c31cfdGreg Kroah-Hartman int status = urb->status; 164fb3abee69de583180348b9029378e31574c31cfdGreg Kroah-Hartman int retval; 165946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 166fb3abee69de583180348b9029378e31574c31cfdGreg Kroah-Hartman switch (status) { 167946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman case 0: 168946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* success */ 169946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman break; 170946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman case -ECONNRESET: 171946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman case -ENOENT: 172946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman case -ESHUTDOWN: 173946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return; 174946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman default: 175946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto exit; 176946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 177946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 178946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman spin_lock(&dev->intr_idx_lock); 179946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman intr_idx = atomic_read(&dev->intr_idx); 180946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* aux_idx become previous intr_idx */ 181946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman aux_idx = (intr_idx == 0) ? (MAX_INTERRUPT_BUFFER - 1) : (intr_idx - 1); 182946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman read_idx = atomic_read(&dev->read_idx); 183946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 184946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* queue is not empty and it's interface 0 */ 185946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if ((intr_idx != read_idx) 186946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman && (dev->interface->cur_altsetting->desc.bInterfaceNumber == 0)) { 187946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* + 1 for serial number */ 188946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman offset = aux_idx * (dev->report_size + 1); 189946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!memcmp 190946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman (dev->read_queue + offset, urb->transfer_buffer, 191946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->report_size)) { 192946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* equal values on interface 0 will be ignored */ 193946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman spin_unlock(&dev->intr_idx_lock); 194946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto exit; 195946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 196946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 197946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 198946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* aux_idx become next intr_idx */ 199946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman aux_idx = (intr_idx == (MAX_INTERRUPT_BUFFER - 1)) ? 0 : (intr_idx + 1); 200946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (read_idx == aux_idx) { 201946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* queue full, dropping oldest input */ 202946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman read_idx = (++read_idx == MAX_INTERRUPT_BUFFER) ? 0 : read_idx; 203946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_set(&dev->read_idx, read_idx); 204946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_set(&dev->overflow_flag, 1); 205946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 206946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 207946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* +1 for serial number */ 208946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman offset = intr_idx * (dev->report_size + 1); 209946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman memcpy(dev->read_queue + offset, urb->transfer_buffer, 210946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->report_size); 211946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman *(dev->read_queue + offset + (dev->report_size)) = dev->serial_number++; 212946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 213946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_set(&dev->intr_idx, aux_idx); 214946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman spin_unlock(&dev->intr_idx_lock); 215946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* tell the blocking read about the new data */ 216946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman wake_up_interruptible(&dev->read_wait); 217946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 218946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanexit: 219fb3abee69de583180348b9029378e31574c31cfdGreg Kroah-Hartman retval = usb_submit_urb(urb, GFP_ATOMIC); 220fb3abee69de583180348b9029378e31574c31cfdGreg Kroah-Hartman if (retval) 221898eb71cb17644964c5895fb190e79e3d0c49679Joe Perches dev_err(&dev->interface->dev, "%s - usb_submit_urb failed with result %d\n", 222441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison __func__, retval); 223946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 224946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman} 225946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 226946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* 227946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * USB Callback handler for write-ops 228946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 229946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic void iowarrior_write_callback(struct urb *urb) 230946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman{ 231946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct iowarrior *dev; 232fb3abee69de583180348b9029378e31574c31cfdGreg Kroah-Hartman int status = urb->status; 233fb3abee69de583180348b9029378e31574c31cfdGreg Kroah-Hartman 234cdc97792289179974af6dda781c855696358d307Ming Lei dev = urb->context; 235946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* sync/async unlink faults aren't errors */ 236fb3abee69de583180348b9029378e31574c31cfdGreg Kroah-Hartman if (status && 237fb3abee69de583180348b9029378e31574c31cfdGreg Kroah-Hartman !(status == -ENOENT || 238fb3abee69de583180348b9029378e31574c31cfdGreg Kroah-Hartman status == -ECONNRESET || status == -ESHUTDOWN)) { 239946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dbg("%s - nonzero write bulk status received: %d", 240fb3abee69de583180348b9029378e31574c31cfdGreg Kroah-Hartman __func__, status); 241946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 242946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* free up our allocated buffer */ 243997ea58eb92f9970b8af7aae48800d0ef43b9423Daniel Mack usb_free_coherent(urb->dev, urb->transfer_buffer_length, 244997ea58eb92f9970b8af7aae48800d0ef43b9423Daniel Mack urb->transfer_buffer, urb->transfer_dma); 245946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* tell a waiting writer the interrupt-out-pipe is available again */ 246946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_dec(&dev->write_busy); 247946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman wake_up_interruptible(&dev->write_wait); 248946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman} 249946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 250946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/** 251946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * iowarrior_delete 252946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 253946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic inline void iowarrior_delete(struct iowarrior *dev) 254946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman{ 255946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dbg("%s - minor %d", __func__, dev->minor); 256946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman kfree(dev->int_in_buffer); 257946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_free_urb(dev->int_in_urb); 258946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman kfree(dev->read_queue); 259946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman kfree(dev); 260946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman} 261946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 262946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/*---------------------*/ 263946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* fops implementation */ 264946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/*---------------------*/ 265946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 266946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic int read_index(struct iowarrior *dev) 267946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman{ 268946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int intr_idx, read_idx; 269946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 270946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman read_idx = atomic_read(&dev->read_idx); 271946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman intr_idx = atomic_read(&dev->intr_idx); 272946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 273946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return (read_idx == intr_idx ? -1 : read_idx); 274946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman} 275946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 276946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/** 277946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * iowarrior_read 278946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 279946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic ssize_t iowarrior_read(struct file *file, char __user *buffer, 280946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman size_t count, loff_t *ppos) 281946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman{ 282946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct iowarrior *dev; 283946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int read_idx; 284946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int offset; 285946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 2865bd6e8b3fb787b7337b681aaa601e5c7bdc67c55Joe Perches dev = file->private_data; 287946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 288946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* verify that the device wasn't unplugged */ 289946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (dev == NULL || !dev->present) 290946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return -ENODEV; 291946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 292946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dbg("%s - minor %d, count = %zd", __func__, dev->minor, count); 293946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 294946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* read count must be packet size (+ time stamp) */ 295946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if ((count != dev->report_size) 296946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman && (count != (dev->report_size + 1))) 297946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return -EINVAL; 298946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 299946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* repeat until no buffer overrun in callback handler occur */ 300946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman do { 301946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_set(&dev->overflow_flag, 0); 302946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if ((read_idx = read_index(dev)) == -1) { 303946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* queue emty */ 304946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (file->f_flags & O_NONBLOCK) 305946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return -EAGAIN; 306946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman else { 307946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman //next line will return when there is either new data, or the device is unplugged 308946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int r = wait_event_interruptible(dev->read_wait, 309946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman (!dev->present 310946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman || (read_idx = 311946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman read_index 312946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman (dev)) != 313946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman -1)); 314946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (r) { 315946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman //we were interrupted by a signal 316946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return -ERESTART; 317946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 318946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!dev->present) { 319946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman //The device was unplugged 320946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return -ENODEV; 321946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 322946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (read_idx == -1) { 323946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman // Can this happen ??? 324946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return 0; 325946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 326946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 327946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 328946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 329946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman offset = read_idx * (dev->report_size + 1); 330946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (copy_to_user(buffer, dev->read_queue + offset, count)) { 331946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return -EFAULT; 332946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 333946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } while (atomic_read(&dev->overflow_flag)); 334946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 335946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman read_idx = ++read_idx == MAX_INTERRUPT_BUFFER ? 0 : read_idx; 336946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_set(&dev->read_idx, read_idx); 337946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return count; 338946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman} 339946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 340946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* 341946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * iowarrior_write 342946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 343946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic ssize_t iowarrior_write(struct file *file, 344946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman const char __user *user_buffer, 345946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman size_t count, loff_t *ppos) 346946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman{ 347946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct iowarrior *dev; 348946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int retval = 0; 349946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman char *buf = NULL; /* for IOW24 and IOW56 we need a buffer */ 350946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct urb *int_out_urb = NULL; 351946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 3525bd6e8b3fb787b7337b681aaa601e5c7bdc67c55Joe Perches dev = file->private_data; 353946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 354946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman mutex_lock(&dev->mutex); 355946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* verify that the device wasn't unplugged */ 356e28c6a77061ab28bd2f0b57e400e3e58cd3474caAdrian Bunk if (!dev->present) { 357946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -ENODEV; 358946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto exit; 359946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 360946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dbg("%s - minor %d, count = %zd", __func__, dev->minor, count); 361946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* if count is 0 we're already done */ 362946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (count == 0) { 363946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = 0; 364946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto exit; 365946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 366946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* We only accept full reports */ 367946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (count != dev->report_size) { 368946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -EINVAL; 369946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto exit; 370946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 371946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman switch (dev->product_id) { 372946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman case USB_DEVICE_ID_CODEMERCS_IOW24: 373946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman case USB_DEVICE_ID_CODEMERCS_IOWPV1: 374946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman case USB_DEVICE_ID_CODEMERCS_IOWPV2: 375946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman case USB_DEVICE_ID_CODEMERCS_IOW40: 376946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* IOW24 and IOW40 use a synchronous call */ 3773ed780117dbe5acb64280d218f0347f238dafed0Kees Cook buf = kmalloc(count, GFP_KERNEL); 378946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!buf) { 379946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -ENOMEM; 380946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto exit; 381946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 382946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (copy_from_user(buf, user_buffer, count)) { 383946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -EFAULT; 384946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman kfree(buf); 385946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto exit; 386946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 387946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = usb_set_report(dev->interface, 2, 0, buf, count); 388946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman kfree(buf); 389946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto exit; 390946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman break; 391946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman case USB_DEVICE_ID_CODEMERCS_IOW56: 392946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* The IOW56 uses asynchronous IO and more urbs */ 393946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (atomic_read(&dev->write_busy) == MAX_WRITES_IN_FLIGHT) { 394946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* Wait until we are below the limit for submitted urbs */ 395946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (file->f_flags & O_NONBLOCK) { 396946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -EAGAIN; 397946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto exit; 398946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } else { 399946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = wait_event_interruptible(dev->write_wait, 400946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman (!dev->present || (atomic_read (&dev-> write_busy) < MAX_WRITES_IN_FLIGHT))); 401946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (retval) { 402946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* we were interrupted by a signal */ 403946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -ERESTART; 404946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto exit; 405946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 406946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!dev->present) { 407946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* The device was unplugged */ 408946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -ENODEV; 409946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto exit; 410946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 411946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!dev->opened) { 412946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* We were closed while waiting for an URB */ 413946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -ENODEV; 414946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto exit; 415946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 416946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 417946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 418946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_inc(&dev->write_busy); 419946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int_out_urb = usb_alloc_urb(0, GFP_KERNEL); 420946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!int_out_urb) { 421946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -ENOMEM; 422946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dbg("%s Unable to allocate urb ", __func__); 423f81ee4d52880b08c213982df5041217212689960Oliver Neukum goto error_no_urb; 424946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 425997ea58eb92f9970b8af7aae48800d0ef43b9423Daniel Mack buf = usb_alloc_coherent(dev->udev, dev->report_size, 426997ea58eb92f9970b8af7aae48800d0ef43b9423Daniel Mack GFP_KERNEL, &int_out_urb->transfer_dma); 427946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!buf) { 428946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -ENOMEM; 429946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dbg("%s Unable to allocate buffer ", __func__); 430f81ee4d52880b08c213982df5041217212689960Oliver Neukum goto error_no_buffer; 431946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 432946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_fill_int_urb(int_out_urb, dev->udev, 433946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_sndintpipe(dev->udev, 434946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->int_out_endpoint->bEndpointAddress), 435946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman buf, dev->report_size, 436946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman iowarrior_write_callback, dev, 437946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->int_out_endpoint->bInterval); 438946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int_out_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 439946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (copy_from_user(buf, user_buffer, count)) { 440946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -EFAULT; 441946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto error; 442946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 443946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = usb_submit_urb(int_out_urb, GFP_KERNEL); 444946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (retval) { 445946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dbg("%s submit error %d for urb nr.%d", __func__, 446946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval, atomic_read(&dev->write_busy)); 447946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto error; 448946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 449946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* submit was ok */ 450946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = count; 451946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_free_urb(int_out_urb); 452946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto exit; 453946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman break; 454946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman default: 455946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* what do we have here ? An unsupported Product-ID ? */ 456898eb71cb17644964c5895fb190e79e3d0c49679Joe Perches dev_err(&dev->interface->dev, "%s - not supported for product=0x%x\n", 457441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison __func__, dev->product_id); 458946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -EFAULT; 459946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto exit; 460946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman break; 461946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 462946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanerror: 463997ea58eb92f9970b8af7aae48800d0ef43b9423Daniel Mack usb_free_coherent(dev->udev, dev->report_size, buf, 464997ea58eb92f9970b8af7aae48800d0ef43b9423Daniel Mack int_out_urb->transfer_dma); 465f81ee4d52880b08c213982df5041217212689960Oliver Neukumerror_no_buffer: 466946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_free_urb(int_out_urb); 467f81ee4d52880b08c213982df5041217212689960Oliver Neukumerror_no_urb: 468946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_dec(&dev->write_busy); 469946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman wake_up_interruptible(&dev->write_wait); 470946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanexit: 471946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman mutex_unlock(&dev->mutex); 472946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return retval; 473946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman} 474946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 475946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/** 476946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * iowarrior_ioctl 477946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 478824f16fda56a88267aba9b2580d7566cf56a0860Alan Coxstatic long iowarrior_ioctl(struct file *file, unsigned int cmd, 479824f16fda56a88267aba9b2580d7566cf56a0860Alan Cox unsigned long arg) 480946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman{ 481946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct iowarrior *dev = NULL; 482946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman __u8 *buffer; 483946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman __u8 __user *user_buffer; 484946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int retval; 485946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int io_res; /* checks for bytes read/written and copy_to/from_user results */ 486946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 4875bd6e8b3fb787b7337b681aaa601e5c7bdc67c55Joe Perches dev = file->private_data; 488946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (dev == NULL) { 489946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return -ENODEV; 490946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 491946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 492946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman buffer = kzalloc(dev->report_size, GFP_KERNEL); 493946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!buffer) 494946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return -ENOMEM; 495946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 496946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* lock this object */ 497925ce689bb31960c839804c19ef38d676f1939b9Arnd Bergmann mutex_lock(&iowarrior_mutex); 498946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman mutex_lock(&dev->mutex); 499946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 500946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* verify that the device wasn't unplugged */ 501946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!dev->present) { 502fc0f8fc9be654bbff08ede04a49bd8f9805b9e13Oliver Neukum retval = -ENODEV; 503fc0f8fc9be654bbff08ede04a49bd8f9805b9e13Oliver Neukum goto error_out; 504946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 505946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 506946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dbg("%s - minor %d, cmd 0x%.4x, arg %ld", __func__, dev->minor, cmd, 507946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman arg); 508946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 509946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = 0; 510946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman io_res = 0; 511946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman switch (cmd) { 512946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman case IOW_WRITE: 513946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW24 || 514946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->product_id == USB_DEVICE_ID_CODEMERCS_IOWPV1 || 515946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->product_id == USB_DEVICE_ID_CODEMERCS_IOWPV2 || 516946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW40) { 517946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman user_buffer = (__u8 __user *)arg; 518946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman io_res = copy_from_user(buffer, user_buffer, 519946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->report_size); 520946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (io_res) { 521946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -EFAULT; 522946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } else { 523946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman io_res = usb_set_report(dev->interface, 2, 0, 524946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman buffer, 525946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->report_size); 526946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (io_res < 0) 527946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = io_res; 528946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 529946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } else { 530946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -EINVAL; 531946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev_err(&dev->interface->dev, 532898eb71cb17644964c5895fb190e79e3d0c49679Joe Perches "ioctl 'IOW_WRITE' is not supported for product=0x%x.\n", 533946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->product_id); 534946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 535946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman break; 536946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman case IOW_READ: 537946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman user_buffer = (__u8 __user *)arg; 538946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman io_res = usb_get_report(dev->udev, 539946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->interface->cur_altsetting, 1, 0, 540946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman buffer, dev->report_size); 541946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (io_res < 0) 542946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = io_res; 543946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman else { 544946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman io_res = copy_to_user(user_buffer, buffer, dev->report_size); 5456d4d4554863b7897f2bc9cd9085f54c819152825Kulikov Vasiliy if (io_res) 546946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -EFAULT; 547946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 548946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman break; 549946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman case IOW_GETINFO: 550946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman { 551946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* Report available information for the device */ 552946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct iowarrior_info info; 553946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* needed for power consumption */ 554946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct usb_config_descriptor *cfg_descriptor = &dev->udev->actconfig->desc; 555946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 556eca67aaeebd6e5d22b0d991af1dd0424dc703bfbVasiliy Kulikov memset(&info, 0, sizeof(info)); 557946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* directly from the descriptor */ 558946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman info.vendor = le16_to_cpu(dev->udev->descriptor.idVendor); 559946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman info.product = dev->product_id; 560946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman info.revision = le16_to_cpu(dev->udev->descriptor.bcdDevice); 561946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 562946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* 0==UNKNOWN, 1==LOW(usb1.1) ,2=FULL(usb1.1), 3=HIGH(usb2.0) */ 563946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman info.speed = le16_to_cpu(dev->udev->speed); 564946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman info.if_num = dev->interface->cur_altsetting->desc.bInterfaceNumber; 565946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman info.report_size = dev->report_size; 566946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 567946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* serial number string has been read earlier 8 chars or empty string */ 568946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman memcpy(info.serial, dev->chip_serial, 569946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman sizeof(dev->chip_serial)); 570946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (cfg_descriptor == NULL) { 571946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman info.power = -1; /* no information available */ 572946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } else { 573946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* the MaxPower is stored in units of 2mA to make it fit into a byte-value */ 574946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman info.power = cfg_descriptor->bMaxPower * 2; 575946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 576946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman io_res = copy_to_user((struct iowarrior_info __user *)arg, &info, 577946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman sizeof(struct iowarrior_info)); 5786d4d4554863b7897f2bc9cd9085f54c819152825Kulikov Vasiliy if (io_res) 579946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -EFAULT; 580946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman break; 581946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 582946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman default: 583946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* return that we did not understand this ioctl call */ 584946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -ENOTTY; 585946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman break; 586946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 587fc0f8fc9be654bbff08ede04a49bd8f9805b9e13Oliver Neukumerror_out: 588946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* unlock the device */ 589946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman mutex_unlock(&dev->mutex); 590925ce689bb31960c839804c19ef38d676f1939b9Arnd Bergmann mutex_unlock(&iowarrior_mutex); 591fc0f8fc9be654bbff08ede04a49bd8f9805b9e13Oliver Neukum kfree(buffer); 592946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return retval; 593946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman} 594946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 595946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/** 596946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * iowarrior_open 597946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 598946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic int iowarrior_open(struct inode *inode, struct file *file) 599946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman{ 600946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct iowarrior *dev = NULL; 601946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct usb_interface *interface; 602946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int subminor; 603946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int retval = 0; 604946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 605946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dbg("%s", __func__); 606946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 607925ce689bb31960c839804c19ef38d676f1939b9Arnd Bergmann mutex_lock(&iowarrior_mutex); 608946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman subminor = iminor(inode); 609946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 610946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman interface = usb_find_interface(&iowarrior_driver, subminor); 611946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!interface) { 612925ce689bb31960c839804c19ef38d676f1939b9Arnd Bergmann mutex_unlock(&iowarrior_mutex); 613441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison err("%s - error, can't find device for minor %d", __func__, 614946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman subminor); 615d4ead16f50f9ad30bdc7276ec8fee7a24c72f294Alan Stern return -ENODEV; 616946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 617946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 61803f36e885fc26cb0ea299fb6df5171a51e814548Oliver Neukum mutex_lock(&iowarrior_open_disc_lock); 619946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev = usb_get_intfdata(interface); 62003f36e885fc26cb0ea299fb6df5171a51e814548Oliver Neukum if (!dev) { 62103f36e885fc26cb0ea299fb6df5171a51e814548Oliver Neukum mutex_unlock(&iowarrior_open_disc_lock); 622925ce689bb31960c839804c19ef38d676f1939b9Arnd Bergmann mutex_unlock(&iowarrior_mutex); 623d4ead16f50f9ad30bdc7276ec8fee7a24c72f294Alan Stern return -ENODEV; 62403f36e885fc26cb0ea299fb6df5171a51e814548Oliver Neukum } 625d4ead16f50f9ad30bdc7276ec8fee7a24c72f294Alan Stern 626d4ead16f50f9ad30bdc7276ec8fee7a24c72f294Alan Stern mutex_lock(&dev->mutex); 62703f36e885fc26cb0ea299fb6df5171a51e814548Oliver Neukum mutex_unlock(&iowarrior_open_disc_lock); 628946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 629946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* Only one process can open each device, no sharing. */ 630946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (dev->opened) { 631946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -EBUSY; 632946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto out; 633946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 634946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 635946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* setup interrupt handler for receiving values */ 636946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if ((retval = usb_submit_urb(dev->int_in_urb, GFP_KERNEL)) < 0) { 637946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev_err(&interface->dev, "Error %d while submitting URB\n", retval); 638946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -EFAULT; 639946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto out; 640946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 641946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* increment our usage count for the driver */ 642946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman ++dev->opened; 643946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* save our object in the file's private structure */ 644946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman file->private_data = dev; 645946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = 0; 646946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 647946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanout: 648d4ead16f50f9ad30bdc7276ec8fee7a24c72f294Alan Stern mutex_unlock(&dev->mutex); 649925ce689bb31960c839804c19ef38d676f1939b9Arnd Bergmann mutex_unlock(&iowarrior_mutex); 650946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return retval; 651946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman} 652946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 653946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/** 654946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * iowarrior_release 655946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 656946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic int iowarrior_release(struct inode *inode, struct file *file) 657946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman{ 658946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct iowarrior *dev; 659946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int retval = 0; 660946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 6615bd6e8b3fb787b7337b681aaa601e5c7bdc67c55Joe Perches dev = file->private_data; 662946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (dev == NULL) { 663946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return -ENODEV; 664946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 665946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 666946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dbg("%s - minor %d", __func__, dev->minor); 667946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 668946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* lock our device */ 669946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman mutex_lock(&dev->mutex); 670946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 671946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (dev->opened <= 0) { 672946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = -ENODEV; /* close called more than once */ 673946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman mutex_unlock(&dev->mutex); 674946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } else { 675946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->opened = 0; /* we're closeing now */ 676946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = 0; 677946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (dev->present) { 678946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* 679946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman The device is still connected so we only shutdown 680946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman pending read-/write-ops. 681946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 682946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_kill_urb(dev->int_in_urb); 683946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman wake_up_interruptible(&dev->read_wait); 684946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman wake_up_interruptible(&dev->write_wait); 685946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman mutex_unlock(&dev->mutex); 686946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } else { 687946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* The device was unplugged, cleanup resources */ 688946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman mutex_unlock(&dev->mutex); 689946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman iowarrior_delete(dev); 690946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 691946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 692946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return retval; 693946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman} 694946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 695946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic unsigned iowarrior_poll(struct file *file, poll_table * wait) 696946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman{ 697946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct iowarrior *dev = file->private_data; 698946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman unsigned int mask = 0; 699946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 700946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!dev->present) 701946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return POLLERR | POLLHUP; 702946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 703946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman poll_wait(file, &dev->read_wait, wait); 704946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman poll_wait(file, &dev->write_wait, wait); 705946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 706946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!dev->present) 707946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return POLLERR | POLLHUP; 708946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 709946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (read_index(dev) != -1) 710946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman mask |= POLLIN | POLLRDNORM; 711946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 712946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (atomic_read(&dev->write_busy) < MAX_WRITES_IN_FLIGHT) 713946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman mask |= POLLOUT | POLLWRNORM; 714946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return mask; 715946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman} 716946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 717946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* 718946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * File operations needed when we register this driver. 719946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * This assumes that this driver NEEDS file operations, 720946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * of course, which means that the driver is expected 721946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * to have a node in the /dev directory. If the USB 722946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * device were for a network interface then the driver 723946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * would use "struct net_driver" instead, and a serial 724946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * device would use "struct tty_driver". 725946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 7260b3f5fe673d4626ea91816ca9c486b43b39a2fd1Jan Engelhardtstatic const struct file_operations iowarrior_fops = { 727946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman .owner = THIS_MODULE, 728946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman .write = iowarrior_write, 729946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman .read = iowarrior_read, 730824f16fda56a88267aba9b2580d7566cf56a0860Alan Cox .unlocked_ioctl = iowarrior_ioctl, 731946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman .open = iowarrior_open, 732946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman .release = iowarrior_release, 733946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman .poll = iowarrior_poll, 7346038f373a3dc1f1c26496e60b6c40b164716f07eArnd Bergmann .llseek = noop_llseek, 735946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman}; 736946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 7372c9ede55ecec58099b72e4bb8eab719f32f72c31Al Virostatic char *iowarrior_devnode(struct device *dev, umode_t *mode) 738f7a386c5b8ff34cd84ae922603d1c6f9d234edeeKay Sievers{ 739f7a386c5b8ff34cd84ae922603d1c6f9d234edeeKay Sievers return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev)); 740f7a386c5b8ff34cd84ae922603d1c6f9d234edeeKay Sievers} 741f7a386c5b8ff34cd84ae922603d1c6f9d234edeeKay Sievers 742946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* 743946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * usb class driver info in order to get a minor number from the usb core, 744946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * and to have the device registered with devfs and the driver core 745946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 746946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic struct usb_class_driver iowarrior_class = { 747946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman .name = "iowarrior%d", 748e454cea20bdcff10ee698d11b8882662a0153a47Kay Sievers .devnode = iowarrior_devnode, 749946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman .fops = &iowarrior_fops, 750946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman .minor_base = IOWARRIOR_MINOR_BASE, 751946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman}; 752946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 753946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/*---------------------------------*/ 754946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* probe and disconnect functions */ 755946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/*---------------------------------*/ 756946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/** 757946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * iowarrior_probe 758946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * 759946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * Called by the usb core when a new device is connected that it thinks 760946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * this driver might be interested in. 761946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 762946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic int iowarrior_probe(struct usb_interface *interface, 763946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman const struct usb_device_id *id) 764946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman{ 765946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct usb_device *udev = interface_to_usbdev(interface); 766946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct iowarrior *dev = NULL; 767946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct usb_host_interface *iface_desc; 768946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct usb_endpoint_descriptor *endpoint; 769946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int i; 770946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int retval = -ENOMEM; 771946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 772b595076a180a56d1bb170e6eceda6eb9d76f4cd3Uwe Kleine-König /* allocate memory for our device state and initialize it */ 773946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev = kzalloc(sizeof(struct iowarrior), GFP_KERNEL); 774946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (dev == NULL) { 775898eb71cb17644964c5895fb190e79e3d0c49679Joe Perches dev_err(&interface->dev, "Out of memory\n"); 776946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return retval; 777946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 778946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 779946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman mutex_init(&dev->mutex); 780946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 781946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_set(&dev->intr_idx, 0); 782946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_set(&dev->read_idx, 0); 783946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman spin_lock_init(&dev->intr_idx_lock); 784946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_set(&dev->overflow_flag, 0); 785946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman init_waitqueue_head(&dev->read_wait); 786946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman atomic_set(&dev->write_busy, 0); 787946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman init_waitqueue_head(&dev->write_wait); 788946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 789946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->udev = udev; 790946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->interface = interface; 791946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 792946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman iface_desc = interface->cur_altsetting; 793946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->product_id = le16_to_cpu(udev->descriptor.idProduct); 794946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 795946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* set up the endpoint information */ 796946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 797946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman endpoint = &iface_desc->endpoint[i].desc; 798946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 799946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (usb_endpoint_is_int_in(endpoint)) 800946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->int_in_endpoint = endpoint; 801946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (usb_endpoint_is_int_out(endpoint)) 802946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* this one will match for the IOWarrior56 only */ 803946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->int_out_endpoint = endpoint; 804946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 805946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* we have to check the report_size often, so remember it in the endianess suitable for our machine */ 80629cc88979a8818cd8c5019426e945aed118b400eKuninori Morimoto dev->report_size = usb_endpoint_maxp(dev->int_in_endpoint); 807946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if ((dev->interface->cur_altsetting->desc.bInterfaceNumber == 0) && 808946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman (dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW56)) 809946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* IOWarrior56 has wMaxPacketSize different from report size */ 810946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->report_size = 7; 811946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 812946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* create the urb and buffer for reading */ 813946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->int_in_urb = usb_alloc_urb(0, GFP_KERNEL); 814946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!dev->int_in_urb) { 815946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev_err(&interface->dev, "Couldn't allocate interrupt_in_urb\n"); 816946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto error; 817946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 818946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->int_in_buffer = kmalloc(dev->report_size, GFP_KERNEL); 819946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!dev->int_in_buffer) { 820946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev_err(&interface->dev, "Couldn't allocate int_in_buffer\n"); 821946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto error; 822946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 823946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_fill_int_urb(dev->int_in_urb, dev->udev, 824946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_rcvintpipe(dev->udev, 825946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->int_in_endpoint->bEndpointAddress), 826946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->int_in_buffer, dev->report_size, 827946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman iowarrior_callback, dev, 828946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->int_in_endpoint->bInterval); 829946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* create an internal buffer for interrupt data from the device */ 830946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->read_queue = 831946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman kmalloc(((dev->report_size + 1) * MAX_INTERRUPT_BUFFER), 832946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman GFP_KERNEL); 833946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (!dev->read_queue) { 834946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev_err(&interface->dev, "Couldn't allocate read_queue\n"); 835946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto error; 836946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 837946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* Get the serial-number of the chip */ 838946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman memset(dev->chip_serial, 0x00, sizeof(dev->chip_serial)); 839946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_string(udev, udev->descriptor.iSerialNumber, dev->chip_serial, 840946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman sizeof(dev->chip_serial)); 841946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (strlen(dev->chip_serial) != 8) 842946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman memset(dev->chip_serial, 0x00, sizeof(dev->chip_serial)); 843946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 844946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* Set the idle timeout to 0, if this is interface 0 */ 845946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (dev->interface->cur_altsetting->desc.bInterfaceNumber == 0) { 846147c5a17338fc72a89452f0a6c14ae6fcf853919Eberhard Fahle usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 847147c5a17338fc72a89452f0a6c14ae6fcf853919Eberhard Fahle 0x0A, 848147c5a17338fc72a89452f0a6c14ae6fcf853919Eberhard Fahle USB_TYPE_CLASS | USB_RECIP_INTERFACE, 0, 849147c5a17338fc72a89452f0a6c14ae6fcf853919Eberhard Fahle 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 850946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 851946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* allow device read and ioctl */ 852946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->present = 1; 853946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 854946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* we can register the device now, as it is ready */ 855946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_set_intfdata(interface, dev); 856946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 857946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman retval = usb_register_dev(interface, &iowarrior_class); 858946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (retval) { 859946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* something prevented us from registering this driver */ 860946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev_err(&interface->dev, "Not able to get a minor for this device.\n"); 861946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_set_intfdata(interface, NULL); 862946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman goto error; 863946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 864946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 865946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->minor = interface->minor; 866946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 867946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* let the user know what node this device is now attached to */ 868946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev_info(&interface->dev, "IOWarrior product=0x%x, serial=%s interface=%d " 869946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman "now attached to iowarrior%d\n", dev->product_id, dev->chip_serial, 870946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman iface_desc->desc.bInterfaceNumber, dev->minor - IOWARRIOR_MINOR_BASE); 871946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return retval; 872946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 873946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanerror: 874946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman iowarrior_delete(dev); 875946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman return retval; 876946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman} 877946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 878946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/** 879946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * iowarrior_disconnect 880946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * 881946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman * Called by the usb core when the device is removed from the system. 882946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 883946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic void iowarrior_disconnect(struct usb_interface *interface) 884946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman{ 885946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman struct iowarrior *dev; 886946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman int minor; 887946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 888946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev = usb_get_intfdata(interface); 88903f36e885fc26cb0ea299fb6df5171a51e814548Oliver Neukum mutex_lock(&iowarrior_open_disc_lock); 890946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_set_intfdata(interface, NULL); 891946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 892946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman minor = dev->minor; 893946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 894946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* give back our minor */ 895946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_deregister_dev(interface, &iowarrior_class); 896946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 897d4ead16f50f9ad30bdc7276ec8fee7a24c72f294Alan Stern mutex_lock(&dev->mutex); 898d4ead16f50f9ad30bdc7276ec8fee7a24c72f294Alan Stern 899946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* prevent device read, write and ioctl */ 900946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev->present = 0; 901946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 902946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman mutex_unlock(&dev->mutex); 90303f36e885fc26cb0ea299fb6df5171a51e814548Oliver Neukum mutex_unlock(&iowarrior_open_disc_lock); 904946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 905946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman if (dev->opened) { 906946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* There is a process that holds a filedescriptor to the device , 907946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman so we only shutdown read-/write-ops going on. 908946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman Deleting the device is postponed until close() was called. 909946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman */ 910946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman usb_kill_urb(dev->int_in_urb); 911946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman wake_up_interruptible(&dev->read_wait); 912946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman wake_up_interruptible(&dev->write_wait); 913946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } else { 914946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman /* no process is using the device, cleanup now */ 915946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman iowarrior_delete(dev); 916946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman } 917946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 918946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman dev_info(&interface->dev, "I/O-Warror #%d now disconnected\n", 919946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman minor - IOWARRIOR_MINOR_BASE); 920946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman} 921946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 922946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman/* usb specific object needed to register this driver with the usb subsystem */ 923946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartmanstatic struct usb_driver iowarrior_driver = { 924946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman .name = "iowarrior", 925946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman .probe = iowarrior_probe, 926946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman .disconnect = iowarrior_disconnect, 927946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman .id_table = iowarrior_ids, 928946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman}; 929946b960d13c15f050a3b848987aaca79f6a459b7Greg Kroah-Hartman 93065db43054065790a75291b0834657445fea2cf56Greg Kroah-Hartmanmodule_usb_driver(iowarrior_driver); 931