diff options
Diffstat (limited to 'drivers/usb/devio.c')
| -rw-r--r-- | drivers/usb/devio.c | 1021 |
1 files changed, 1021 insertions, 0 deletions
diff --git a/drivers/usb/devio.c b/drivers/usb/devio.c new file mode 100644 index 000000000..5fb51d93c --- /dev/null +++ b/drivers/usb/devio.c @@ -0,0 +1,1021 @@ +/*****************************************************************************/ + +/* + * devio.c -- User space communication with USB devices. + * + * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * $Id: devio.c,v 1.6 2000/01/11 23:26:33 tom Exp $ + * + * This file implements the usbdevfs/x/y files, where + * x is the bus number and y the device number. + * + * It allows user space programs/"drivers" to communicate directly + * with USB devices without intervening kernel driver. + * + * Revision history + * 22.12.1999 0.1 Initial release (split from proc_usb.c) + * 04.01.2000 0.2 Turned into its own filesystem + */ + +/*****************************************************************************/ + +#include <linux/fs.h> +#include <linux/mm.h> +#include <linux/slab.h> +#include <linux/smp_lock.h> +#include <linux/signal.h> +#include <linux/poll.h> +#include <asm/uaccess.h> + +#include "usb.h" +#include "usbdevice_fs.h" + +struct async { + struct list_head asynclist; + struct dev_state *ps; + struct task_struct *task; + unsigned int signr; + void *userbuffer; + void *userurb; + urb_t urb; +}; + +/* + * my own sync control and bulk methods. Here to experiment + * and because the kernel ones set the process to TASK_UNINTERRUPTIBLE. + */ + +struct sync { + wait_queue_head_t wait; +}; + +static void sync_completed(purb_t urb) +{ + struct sync *s = (struct sync *)urb->context; + + wake_up(&s->wait); +} + +static int do_sync(purb_t urb, int timeout) +{ + DECLARE_WAITQUEUE(wait, current); + unsigned long tm; + signed long tmdiff; + struct sync s; + int ret; + + tm = jiffies+timeout; + init_waitqueue_head(&s.wait); + add_wait_queue(&s.wait, &wait); + urb->context = &s; + urb->complete = sync_completed; + set_current_state(TASK_INTERRUPTIBLE); + if ((ret = usb_submit_urb(urb))) + goto out; + while (urb->status == -EINPROGRESS) { + tmdiff = tm - jiffies; + if (tmdiff <= 0) { + ret = -ETIMEDOUT; + goto out; + } + if (signal_pending(current)) { + ret = -EINTR; + goto out; + } + schedule_timeout(tmdiff); + } + ret = urb->status; + out: + set_current_state(TASK_RUNNING); + usb_unlink_urb(urb); + remove_wait_queue(&s.wait, &wait); + return ret; +} + +static int my_usb_control_msg(struct usb_device *dev, unsigned int pipe, __u8 request, __u8 requesttype, + __u16 value, __u16 index, void *data, __u16 size, int timeout) +{ + urb_t *urb; + int ret; + + if (!(urb = usb_alloc_urb(0))) + return -ENOMEM; + if (!(urb->setup_packet = kmalloc(8, GFP_KERNEL))) { + usb_free_urb(urb); + return -ENOMEM; + } + urb->setup_packet[0] = requesttype; + urb->setup_packet[1] = request; + urb->setup_packet[2] = value; + urb->setup_packet[3] = value >> 8; + urb->setup_packet[4] = index; + urb->setup_packet[5] = index >> 8; + urb->setup_packet[6] = size; + urb->setup_packet[7] = size >> 8; + urb->dev = dev; + urb->pipe = pipe; + urb->transfer_buffer = data; + urb->transfer_buffer_length = size; + ret = do_sync(urb, timeout); + if (ret >= 0) + ret = urb->status; + if (ret >= 0) + ret = urb->actual_length; + kfree(urb->setup_packet); + usb_free_urb(urb); + return ret; +} + +static int my_usb_bulk_msg(struct usb_device *dev, unsigned int pipe, + void *data, int len, int *actual_length, int timeout) +{ + urb_t *urb; + int ret; + + if (!(urb = usb_alloc_urb(0))) + return -ENOMEM; + urb->dev = dev; + urb->pipe = pipe; + urb->transfer_buffer = data; + urb->transfer_buffer_length = len; + ret = do_sync(urb, timeout); + if (ret >= 0) + ret = urb->status; + if (ret >= 0 && actual_length != NULL) + *actual_length = urb->actual_length; + usb_free_urb(urb); + return ret; +} + +static long long usbdev_lseek(struct file *file, long long offset, int orig) +{ + switch (orig) { + case 0: + file->f_pos = offset; + return file->f_pos; + + case 1: + file->f_pos += offset; + return file->f_pos; + + case 2: + return -EINVAL; + + default: + return -EINVAL; + } +} + +static ssize_t usbdev_read(struct file *file, char * buf, size_t nbytes, loff_t *ppos) +{ + struct dev_state *ps = (struct dev_state *)file->private_data; + ssize_t ret = 0; + unsigned len; + loff_t pos; + + pos = *ppos; + down_read(&ps->devsem); + if (!ps->dev) + ret = -ENODEV; + else if (pos < 0) + ret = -EINVAL; + else if (pos < sizeof(struct usb_device_descriptor)) { + len = sizeof(struct usb_device_descriptor) - pos; + if (len > nbytes) + len = nbytes; + if (copy_to_user(buf, ((char *)&ps->dev->descriptor) + pos, len)) + ret = -EFAULT; + else { + *ppos += len; + buf += len; + nbytes -= len; + ret += len; + } + } + up_read(&ps->devsem); + return ret; +} + +extern inline unsigned int ld2(unsigned int x) +{ + unsigned int r = 0; + + if (x >= 0x10000) { + x >>= 16; + r += 16; + } + if (x >= 0x100) { + x >>= 8; + r += 8; + } + if (x >= 0x10) { + x >>= 4; + r += 4; + } + if (x >= 4) { + x >>= 2; + r += 2; + } + if (x >= 2) + r++; + return r; +} + +/* + * async list handling + */ + +static struct async *alloc_async(unsigned int numisoframes) +{ + unsigned int assize = sizeof(struct async) + numisoframes * sizeof(iso_packet_descriptor_t); + struct async *as = kmalloc(assize, GFP_KERNEL); + if (!as) + return NULL; + memset(as, 0, assize); + as->urb.number_of_packets = numisoframes; + return as; +} + +static void free_async(struct async *as) +{ + if (as->urb.transfer_buffer) + kfree(as->urb.transfer_buffer); + kfree(as); +} + +extern __inline__ void async_newpending(struct async *as) +{ + struct dev_state *ps = as->ps; + unsigned long flags; + + spin_lock_irqsave(&ps->lock, flags); + list_add_tail(&as->asynclist, &ps->async_pending); + spin_unlock_irqrestore(&ps->lock, flags); +} + +extern __inline__ void async_removepending(struct async *as) +{ + struct dev_state *ps = as->ps; + unsigned long flags; + + spin_lock_irqsave(&ps->lock, flags); + list_del(&as->asynclist); + INIT_LIST_HEAD(&as->asynclist); + spin_unlock_irqrestore(&ps->lock, flags); +} + +extern __inline__ struct async *async_getcompleted(struct dev_state *ps) +{ + unsigned long flags; + struct async *as = NULL; + + spin_lock_irqsave(&ps->lock, flags); + if (!list_empty(&ps->async_completed)) { + as = list_entry(ps->async_completed.next, struct async, asynclist); + list_del(&as->asynclist); + INIT_LIST_HEAD(&as->asynclist); + } + spin_unlock_irqrestore(&ps->lock, flags); + return as; +} + +extern __inline__ struct async *async_getpending(struct dev_state *ps, void *userurb) +{ + unsigned long flags; + struct async *as; + struct list_head *p; + + spin_lock_irqsave(&ps->lock, flags); + for (p = ps->async_pending.next; p != &ps->async_pending; ) { + as = list_entry(p, struct async, asynclist); + p = p->next; + if (as->userurb != userurb) + continue; + list_del(&as->asynclist); + INIT_LIST_HEAD(&as->asynclist); + spin_unlock_irqrestore(&ps->lock, flags); + return as; + } + spin_unlock_irqrestore(&ps->lock, flags); + return NULL; +} + +static void async_completed(purb_t urb) +{ + struct async *as = (struct async *)urb->context; + struct dev_state *ps = as->ps; + struct siginfo sinfo; + +#if 0 + printk(KERN_DEBUG "usbdevfs: async_completed: status %d errcount %d actlen %d pipe 0x%x\n", + urb->status, urb->error_count, urb->actual_length, urb->pipe); +#endif + spin_lock(&ps->lock); + list_del(&as->asynclist); + list_add_tail(&as->asynclist, &ps->async_completed); + spin_unlock(&ps->lock); + wake_up(&ps->wait); + if (as->signr) { + sinfo.si_signo = as->signr; + sinfo.si_errno = as->urb.status; + sinfo.si_code = SI_ASYNCIO; + sinfo.si_addr = as->userurb; + send_sig_info(as->signr, &sinfo, as->task); + } +} + +static void destroy_all_async(struct dev_state *ps) +{ + struct async *as; + unsigned long flags; + + spin_lock_irqsave(&ps->lock, flags); + if (!list_empty(&ps->async_pending)) { + as = list_entry(ps->async_pending.next, struct async, asynclist); + list_del(&as->asynclist); + INIT_LIST_HEAD(&as->asynclist); + spin_unlock_irqrestore(&ps->lock, flags); + /* usb_unlink_urb calls the completion handler with status == USB_ST_URB_KILLED */ + usb_unlink_urb(&as->urb); + spin_lock_irqsave(&ps->lock, flags); + } + spin_unlock_irqrestore(&ps->lock, flags); + while ((as = async_getcompleted(ps))) + free_async(as); +} + +/* + * interface claiming + */ + +static void *driver_probe(struct usb_device *dev, unsigned int intf) +{ + return NULL; +} + +static void driver_disconnect(struct usb_device *dev, void *context) +{ + struct dev_state *ps = (struct dev_state *)context; + + ps->ifclaimed = 0; +} + +struct usb_driver usbdevfs_driver = { + "usbdevfs", + driver_probe, + driver_disconnect, + LIST_HEAD_INIT(usbdevfs_driver.driver_list), + NULL, + 0 +}; + +static int claimintf(struct dev_state *ps, unsigned int intf) +{ + struct usb_device *dev = ps->dev; + struct usb_interface *iface; + int err; + + if (intf >= 8*sizeof(ps->ifclaimed) || !dev || intf >= dev->actconfig->bNumInterfaces) + return -EINVAL; + /* already claimed */ + if (test_bit(intf, &ps->ifclaimed)) + return 0; + iface = &dev->actconfig->interface[intf]; + err = -EBUSY; + lock_kernel(); + if (!usb_interface_claimed(iface)) { + usb_driver_claim_interface(&usbdevfs_driver, iface, ps); + set_bit(intf, &ps->ifclaimed); + err = 0; + } + unlock_kernel(); + return err; +} + +static int releaseintf(struct dev_state *ps, unsigned int intf) +{ + struct usb_device *dev; + struct usb_interface *iface; + int err; + + if (intf >= 8*sizeof(ps->ifclaimed)) + return -EINVAL; + err = -EINVAL; + lock_kernel(); + dev = ps->dev; + if (dev && test_and_clear_bit(intf, &ps->ifclaimed)) { + iface = &dev->actconfig->interface[intf]; + usb_driver_release_interface(&usbdevfs_driver, iface); + err = 0; + } + unlock_kernel(); + return err; +} + +static int checkintf(struct dev_state *ps, unsigned int intf) +{ + if (intf >= 8*sizeof(ps->ifclaimed)) + return -EINVAL; + if (test_bit(intf, &ps->ifclaimed)) + return 0; + /* if not yet claimed, claim it for the driver */ + printk(KERN_WARNING "usbdevfs: process %d (%s) did not claim interface %u before use\n", + current->pid, current->comm, intf); + return claimintf(ps, intf); +} + +static int findintfep(struct usb_device *dev, unsigned int ep) +{ + unsigned int i, j, e; + struct usb_interface *iface; + struct usb_interface_descriptor *alts; + struct usb_endpoint_descriptor *endpt; + + if (ep & ~(USB_DIR_IN|0xf)) + return -EINVAL; + for (i = 0; i < dev->actconfig->bNumInterfaces; i++) { + iface = &dev->actconfig->interface[i]; + for (j = 0; j < iface->num_altsetting; j++) { + alts = &iface->altsetting[j]; + for (e = 0; e < alts->bNumEndpoints; e++) { + endpt = &alts->endpoint[e]; + if (endpt->bEndpointAddress == ep) + return i; + } + } + } + return -ENOENT; +} + +static int findintfif(struct usb_device *dev, unsigned int ifn) +{ + unsigned int i, j; + struct usb_interface *iface; + struct usb_interface_descriptor *alts; + + if (ifn & ~0xff) + return -EINVAL; + for (i = 0; i < dev->actconfig->bNumInterfaces; i++) { + iface = &dev->actconfig->interface[i]; + for (j = 0; j < iface->num_altsetting; j++) { + alts = &iface->altsetting[j]; + if (alts->bInterfaceNumber == ifn) + return i; + } + } + return -ENOENT; +} + +/* + * file operations + */ +static int usbdev_open(struct inode *inode, struct file *file) +{ + struct usb_device *dev; + struct dev_state *ps; + int ret; + + /* + * no locking necessary here, as both sys_open (actually filp_open) + * and the hub thread have the kernel lock + * (still acquire the kernel lock for safety) + */ + lock_kernel(); + ret = -ENOENT; + if (ITYPE(inode->i_ino) != IDEVICE) + goto out; + dev = inode->u.usbdev_i.p.dev; + if (!dev) + goto out; + ret = -ENOMEM; + if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL))) + goto out; + ret = 0; + ps->dev = dev; + ps->file = file; + spin_lock_init(&ps->lock); + INIT_LIST_HEAD(&ps->async_pending); + INIT_LIST_HEAD(&ps->async_completed); + init_waitqueue_head(&ps->wait); + init_rwsem(&ps->devsem); + ps->discsignr = 0; + ps->disctask = current; + ps->disccontext = NULL; + ps->ifclaimed = 0; + wmb(); + list_add_tail(&ps->list, &dev->filelist); + file->private_data = ps; + out: + unlock_kernel(); + return ret; +} + +static int usbdev_release(struct inode *inode, struct file *file) +{ + struct dev_state *ps = (struct dev_state *)file->private_data; + unsigned int i; + + lock_kernel(); + list_del(&ps->list); + INIT_LIST_HEAD(&ps->list); + if (ps->dev) { + for (i = 0; ps->ifclaimed && i < 8*sizeof(ps->ifclaimed); i++) + if (test_bit(i, &ps->ifclaimed)) + releaseintf(ps, i); + } + unlock_kernel(); + destroy_all_async(ps); + kfree(ps); + return 0; +} + +static int proc_control(struct dev_state *ps, void *arg) +{ + struct usb_device *dev = ps->dev; + struct usbdevfs_ctrltransfer ctrl; + unsigned int tmo; + unsigned char *tbuf; + int i, ret; + + copy_from_user_ret(&ctrl, (void *)arg, sizeof(ctrl), -EFAULT); + switch (ctrl.requesttype & 0x1f) { + case USB_RECIP_ENDPOINT: + if ((ret = findintfep(ps->dev, ctrl.index & 0xff)) < 0) + return ret; + if ((ret = checkintf(ps, ret))) + return ret; + break; + + case USB_RECIP_INTERFACE: + if ((ret = findintfif(ps->dev, ctrl.index & 0xff)) < 0) + return ret; + if ((ret = checkintf(ps, ret))) + return ret; + break; + } + if (ctrl.length > PAGE_SIZE) + return -EINVAL; + if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL))) + return -ENOMEM; + tmo = (ctrl.timeout * HZ + 999) / 1000; + if (ctrl.requesttype & 0x80) { + if (ctrl.length && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.length)) { + free_page((unsigned long)tbuf); + return -EINVAL; + } + i = my_usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.request, ctrl.requesttype, + ctrl.value, ctrl.index, tbuf, ctrl.length, tmo); + if ((i > 0) && ctrl.length) { + copy_to_user_ret(ctrl.data, tbuf, ctrl.length, -EFAULT); + } + } else { + if (ctrl.length) { + copy_from_user_ret(tbuf, ctrl.data, ctrl.length, -EFAULT); + } + i = my_usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.request, ctrl.requesttype, + ctrl.value, ctrl.index, tbuf, ctrl.length, tmo); + } + free_page((unsigned long)tbuf); + if (i<0) { + printk(KERN_DEBUG "usbdevfs: USBDEVFS_CONTROL failed dev %d rqt %u rq %u len %u ret %d\n", + dev->devnum, ctrl.requesttype, ctrl.request, ctrl.length, i); + } + return i; +} + +static int proc_bulk(struct dev_state *ps, void *arg) +{ + struct usb_device *dev = ps->dev; + struct usbdevfs_bulktransfer bulk; + unsigned int tmo, len1, pipe; + int len2; + unsigned char *tbuf; + int i, ret; + + copy_from_user_ret(&bulk, (void *)arg, sizeof(bulk), -EFAULT); + if ((ret = findintfep(ps->dev, bulk.ep)) < 0) + return ret; + if ((ret = checkintf(ps, ret))) + return ret; + if (bulk.ep & USB_DIR_IN) + pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); + else + pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); + if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) + return -EINVAL; + len1 = bulk.len; + if (len1 > PAGE_SIZE) + len1 = PAGE_SIZE; + if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL))) + return -ENOMEM; + tmo = (bulk.timeout * HZ + 999) / 1000; + if (bulk.ep & 0x80) { + if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { + free_page((unsigned long)tbuf); + return -EINVAL; + } + i = my_usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); + if (!i && len2) { + copy_to_user_ret(bulk.data, tbuf, len2, -EFAULT); + } + } else { + if (len1) { + copy_from_user_ret(tbuf, bulk.data, len1, -EFAULT); + } + i = my_usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); + } + free_page((unsigned long)tbuf); + if (i < 0) { + printk(KERN_WARNING "usbdevfs: USBDEVFS_BULK failed dev %d ep 0x%x len %u ret %d\n", + dev->devnum, bulk.ep, bulk.len, i); + return i; + } + return len2; +} + +static int proc_resetep(struct dev_state *ps, void *arg) +{ + unsigned int ep; + int ret; + + get_user_ret(ep, (unsigned int *)arg, -EFAULT); + if ((ret = findintfep(ps->dev, ep)) < 0) + return ret; + if ((ret = checkintf(ps, ret))) + return ret; + usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0); + return 0; +} + +static int proc_setintf(struct dev_state *ps, void *arg) +{ + struct usbdevfs_setinterface setintf; + int ret; + + copy_from_user_ret(&setintf, arg, sizeof(setintf), -EFAULT); + if ((ret = findintfif(ps->dev, setintf.interface)) < 0) + return ret; + if ((ret = checkintf(ps, ret))) + return ret; + if (usb_set_interface(ps->dev, setintf.interface, setintf.altsetting)) + return -EINVAL; + return 0; +} + +static int proc_setconfig(struct dev_state *ps, void *arg) +{ + unsigned int u; + + get_user_ret(u, (unsigned int *)arg, -EFAULT); + if (usb_set_configuration(ps->dev, u) < 0) + return -EINVAL; + return 0; +} + +static int proc_submiturb(struct dev_state *ps, void *arg) +{ + struct usbdevfs_urb uurb; + struct usbdevfs_iso_packet_desc *isopkt = NULL; + struct async *as; + unsigned int u, totlen, isofrmlen; + int ret; + + copy_from_user_ret(&uurb, arg, sizeof(uurb), -EFAULT); + if (uurb.flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_DISABLE_SPD)) + return -EINVAL; + if (!uurb.buffer) + return -EINVAL; + if (uurb.signr != 0 && (uurb.signr < SIGRTMIN || uurb.signr > SIGRTMAX)) + return -EINVAL; + if ((ret = findintfep(ps->dev, uurb.endpoint)) < 0) + return ret; + if ((ret = checkintf(ps, ret))) + return ret; + switch(uurb.type) { + case USBDEVFS_URB_TYPE_BULK: + uurb.number_of_packets = 0; + if (uurb.buffer_length > 16384) + return -EINVAL; + if (!access_ok((uurb.endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb.buffer, uurb.buffer_length)) + return -EFAULT; + break; + + case USBDEVFS_URB_TYPE_ISO: + /* arbitrary limit */ + if (uurb.number_of_packets < 1 || uurb.number_of_packets > 128) + return -EINVAL; + isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb.number_of_packets; + if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) + return -ENOMEM; + if (copy_from_user(isopkt, &((struct usbdevfs_urb *)arg)->iso_frame_desc, isofrmlen)) { + kfree(isopkt); + return -EFAULT; + } + for (totlen = u = 0; u < uurb.number_of_packets; u++) { + if (isopkt[u].length > 1023) { + kfree(isopkt); + return -EINVAL; + } + totlen += isopkt[u].length; + } + if (totlen > 32768) { + kfree(isopkt); + return -ENOMEM; + } + uurb.buffer_length = totlen; + break; + + default: + return -EINVAL; + } + if (!(as = alloc_async(uurb.number_of_packets))) { + if (isopkt) + kfree(isopkt); + return -ENOMEM; + } + if (!(as->urb.transfer_buffer = kmalloc(uurb.buffer_length, GFP_KERNEL))) { + if (isopkt) + kfree(isopkt); + free_async(as); + return -ENOMEM; + } + as->urb.next = NULL; + as->urb.dev = ps->dev; + as->urb.pipe = (uurb.type << 30) | __create_pipe(ps->dev, uurb.endpoint & 0xf) | (uurb.endpoint & USB_DIR_IN); + as->urb.transfer_flags = uurb.flags; + as->urb.transfer_buffer_length = uurb.buffer_length; + as->urb.start_frame = uurb.start_frame; + as->urb.number_of_packets = uurb.number_of_packets; + as->urb.context = as; + as->urb.complete = async_completed; + for (totlen = u = 0; u < uurb.number_of_packets; u++) { + as->urb.iso_frame_desc[u].offset = totlen; + as->urb.iso_frame_desc[u].length = isopkt[u].length; + totlen += isopkt[u].length; + } + if (isopkt) + kfree(isopkt); + as->ps = ps; + as->userurb = arg; + if (uurb.endpoint & USB_DIR_IN) + as->userbuffer = uurb.buffer; + else + as->userbuffer = NULL; + as->signr = uurb.signr; + as->task = current; + if (!(uurb.endpoint & USB_DIR_IN)) { + if (copy_from_user(as->urb.transfer_buffer, uurb.buffer, as->urb.transfer_buffer_length)) { + free_async(as); + return -EFAULT; + } + } + async_newpending(as); + if ((ret = usb_submit_urb(&as->urb))) { + printk(KERN_DEBUG "usbdevfs: usb_submit_urb returned %d\n", ret); + async_removepending(as); + free_async(as); + return ret; + } + return 0; +} + +static int proc_unlinkurb(struct dev_state *ps, void *arg) +{ + struct async *as; + + as = async_getpending(ps, arg); + if (!as) + return -EINVAL; + usb_unlink_urb(&as->urb); + return 0; +} + +static int processcompl(struct async *as) +{ + unsigned int i; + + if (as->userbuffer) + if (copy_to_user(as->userbuffer, as->urb.transfer_buffer, as->urb.transfer_buffer_length)) + return -EFAULT; + put_user_ret(as->urb.status, &((struct usbdevfs_urb *)as->userurb)->status, -EFAULT); + put_user_ret(as->urb.actual_length, &((struct usbdevfs_urb *)as->userurb)->actual_length, -EFAULT); + put_user_ret(as->urb.error_count, &((struct usbdevfs_urb *)as->userurb)->error_count, -EFAULT); + if (!(usb_pipeisoc(as->urb.pipe))) + return 0; + for (i = 0; i < as->urb.number_of_packets; i++) { + put_user_ret(as->urb.iso_frame_desc[i].actual_length, + &((struct usbdevfs_urb *)as->userurb)->iso_frame_desc[i].actual_length, + -EFAULT); + put_user_ret(as->urb.iso_frame_desc[i].status, + &((struct usbdevfs_urb *)as->userurb)->iso_frame_desc[i].status, + -EFAULT); + } + return 0; +} + +static int proc_reapurb(struct dev_state *ps, void *arg) +{ + DECLARE_WAITQUEUE(wait, current); + struct async *as = NULL; + void *addr; + int ret; + + add_wait_queue(&ps->wait, &wait); + while (ps->dev) { + __set_current_state(TASK_INTERRUPTIBLE); + if ((as = async_getcompleted(ps))) + break; + if (signal_pending(current)) + break; + up_read(&ps->devsem); + schedule(); + down_read(&ps->devsem); + } + remove_wait_queue(&ps->wait, &wait); + set_current_state(TASK_RUNNING); + if (as) { + ret = processcompl(as); + addr = as->userurb; + free_async(as); + if (ret) + return ret; + put_user_ret(addr, (void **)arg, -EFAULT); + return 0; + } + if (signal_pending(current)) + return -EINTR; + return -EIO; +} + +static int proc_reapurbnonblock(struct dev_state *ps, void *arg) +{ + struct async *as; + void *addr; + int ret; + + if (!(as = async_getcompleted(ps))) + return -EAGAIN; + ret = processcompl(as); + addr = as->userurb; + free_async(as); + if (ret) + return ret; + put_user_ret(addr, (void **)arg, -EFAULT); + return 0; +} + +static int proc_disconnectsignal(struct dev_state *ps, void *arg) +{ + struct usbdevfs_disconnectsignal ds; + + copy_from_user_ret(&ds, arg, sizeof(ds), -EFAULT); + if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX)) + return -EINVAL; + ps->discsignr = ds.signr; + ps->disccontext = ds.context; + return 0; +} + +static int proc_claiminterface(struct dev_state *ps, void *arg) +{ + unsigned int intf; + int ret; + + get_user_ret(intf, (unsigned int *)arg, -EFAULT); + if ((ret = findintfif(ps->dev, intf)) < 0) + return ret; + return claimintf(ps, ret); +} + +static int proc_releaseinterface(struct dev_state *ps, void *arg) +{ + unsigned int intf; + int ret; + + get_user_ret(intf, (unsigned int *)arg, -EFAULT); + if ((ret = findintfif(ps->dev, intf)) < 0) + return ret; + return releaseintf(ps, intf); +} + +static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) +{ + struct dev_state *ps = (struct dev_state *)file->private_data; + int ret = -ENOIOCTLCMD; + + if (!(file->f_mode & FMODE_WRITE)) + return -EPERM; + down_read(&ps->devsem); + if (!ps->dev) { + up_read(&ps->devsem); + return -ENODEV; + } + switch (cmd) { + case USBDEVFS_CONTROL: + ret = proc_control(ps, (void *)arg); + if (ret >= 0) + inode->i_mtime = CURRENT_TIME; + break; + + case USBDEVFS_BULK: + ret = proc_bulk(ps, (void *)arg); + if (ret >= 0) + inode->i_mtime = CURRENT_TIME; + break; + + case USBDEVFS_RESETEP: + ret = proc_resetep(ps, (void *)arg); + if (ret >= 0) + inode->i_mtime = CURRENT_TIME; + break; + + case USBDEVFS_SETINTERFACE: + ret = proc_setintf(ps, (void *)arg); + break; + + case USBDEVFS_SETCONFIGURATION: + ret = proc_setconfig(ps, (void *)arg); + break; + + case USBDEVFS_SUBMITURB: + ret = proc_submiturb(ps, (void *)arg); + if (ret >= 0) + inode->i_mtime = CURRENT_TIME; + break; + + case USBDEVFS_DISCARDURB: + ret = proc_unlinkurb(ps, (void *)arg); + break; + + case USBDEVFS_REAPURB: + ret = proc_reapurb(ps, (void *)arg); + break; + + case USBDEVFS_REAPURBNDELAY: + ret = proc_reapurbnonblock(ps, (void *)arg); + break; + + case USBDEVFS_DISCSIGNAL: + ret = proc_disconnectsignal(ps, (void *)arg); + break; + + case USBDEVFS_CLAIMINTERFACE: + ret = proc_claiminterface(ps, (void *)arg); + break; + + case USBDEVFS_RELEASEINTERFACE: + ret = proc_releaseinterface(ps, (void *)arg); + break; + + } + up_read(&ps->devsem); + if (ret >= 0) + inode->i_atime = CURRENT_TIME; + return ret; +} + +static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait) +{ + struct dev_state *ps = (struct dev_state *)file->private_data; + unsigned int mask = 0; + + poll_wait(file, &ps->wait, wait); + if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) + mask |= POLLOUT | POLLWRNORM; + if (!ps->dev) + mask |= POLLERR | POLLHUP; + return mask; +} + +static struct file_operations usbdevfs_device_file_operations = { + usbdev_lseek, /* lseek */ + usbdev_read, /* read */ + NULL, /* write */ + NULL, /* readdir */ + usbdev_poll, /* poll */ + usbdev_ioctl, /* ioctl */ + NULL, /* mmap */ + usbdev_open, /* open */ + NULL, /* flush */ + usbdev_release, /* release */ + NULL /* fsync */ +}; + +struct inode_operations usbdevfs_device_inode_operations = { + &usbdevfs_device_file_operations, /* file-ops */ +}; |