837 lines
22 KiB
C
837 lines
22 KiB
C
/*****************************************************************************/
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/*
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* uss720.c -- USS720 USB Parport Cable.
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*
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* Copyright (C) 1999, 2005, 2010
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* Thomas Sailer (t.sailer@alumni.ethz.ch)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Based on parport_pc.c
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*
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* History:
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* 0.1 04.08.1999 Created
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* 0.2 07.08.1999 Some fixes mainly suggested by Tim Waugh
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* Interrupt handling currently disabled because
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* usb_request_irq crashes somewhere within ohci.c
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* for no apparent reason (that is for me, anyway)
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* ECP currently untested
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* 0.3 10.08.1999 fixing merge errors
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* 0.4 13.08.1999 Added Vendor/Product ID of Brad Hard's cable
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* 0.5 20.09.1999 usb_control_msg wrapper used
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* Nov01.2000 usb_device_table support by Adam J. Richter
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* 08.04.2001 Identify version on module load. gb
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* 0.6 02.09.2005 Fix "scheduling in interrupt" problem by making save/restore
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* context asynchronous
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*
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*/
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/*****************************************************************************/
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#include <linux/module.h>
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#include <linux/socket.h>
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#include <linux/parport.h>
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#include <linux/init.h>
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#include <linux/usb.h>
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#include <linux/delay.h>
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#include <linux/completion.h>
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#include <linux/kref.h>
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#include <linux/slab.h>
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "v0.6"
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#define DRIVER_AUTHOR "Thomas M. Sailer, t.sailer@alumni.ethz.ch"
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#define DRIVER_DESC "USB Parport Cable driver for Cables using the Lucent Technologies USS720 Chip"
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/* --------------------------------------------------------------------- */
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struct parport_uss720_private {
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struct usb_device *usbdev;
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struct parport *pp;
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struct kref ref_count;
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__u8 reg[7]; /* USB registers */
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struct list_head asynclist;
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spinlock_t asynclock;
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};
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struct uss720_async_request {
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struct parport_uss720_private *priv;
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struct kref ref_count;
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struct list_head asynclist;
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struct completion compl;
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struct urb *urb;
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struct usb_ctrlrequest *dr;
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__u8 reg[7];
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};
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/* --------------------------------------------------------------------- */
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static void destroy_priv(struct kref *kref)
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{
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struct parport_uss720_private *priv = container_of(kref, struct parport_uss720_private, ref_count);
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dev_dbg(&priv->usbdev->dev, "destroying priv datastructure\n");
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usb_put_dev(priv->usbdev);
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kfree(priv);
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}
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static void destroy_async(struct kref *kref)
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{
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struct uss720_async_request *rq = container_of(kref, struct uss720_async_request, ref_count);
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struct parport_uss720_private *priv = rq->priv;
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unsigned long flags;
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if (likely(rq->urb))
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usb_free_urb(rq->urb);
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kfree(rq->dr);
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spin_lock_irqsave(&priv->asynclock, flags);
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list_del_init(&rq->asynclist);
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spin_unlock_irqrestore(&priv->asynclock, flags);
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kfree(rq);
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kref_put(&priv->ref_count, destroy_priv);
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}
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/* --------------------------------------------------------------------- */
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static void async_complete(struct urb *urb)
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{
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struct uss720_async_request *rq;
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struct parport *pp;
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struct parport_uss720_private *priv;
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int status = urb->status;
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rq = urb->context;
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priv = rq->priv;
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pp = priv->pp;
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if (status) {
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dev_err(&urb->dev->dev, "async_complete: urb error %d\n",
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status);
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} else if (rq->dr->bRequest == 3) {
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memcpy(priv->reg, rq->reg, sizeof(priv->reg));
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#if 0
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dev_dbg(&priv->usbdev->dev, "async_complete regs %7ph\n",
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priv->reg);
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#endif
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/* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */
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if (rq->reg[2] & rq->reg[1] & 0x10 && pp)
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parport_generic_irq(pp);
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}
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complete(&rq->compl);
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kref_put(&rq->ref_count, destroy_async);
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}
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static struct uss720_async_request *submit_async_request(struct parport_uss720_private *priv,
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__u8 request, __u8 requesttype, __u16 value, __u16 index,
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gfp_t mem_flags)
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{
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struct usb_device *usbdev;
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struct uss720_async_request *rq;
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unsigned long flags;
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int ret;
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if (!priv)
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return NULL;
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usbdev = priv->usbdev;
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if (!usbdev)
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return NULL;
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rq = kzalloc(sizeof(struct uss720_async_request), mem_flags);
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if (!rq)
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return NULL;
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kref_init(&rq->ref_count);
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INIT_LIST_HEAD(&rq->asynclist);
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init_completion(&rq->compl);
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kref_get(&priv->ref_count);
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rq->priv = priv;
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rq->urb = usb_alloc_urb(0, mem_flags);
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if (!rq->urb) {
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kref_put(&rq->ref_count, destroy_async);
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return NULL;
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}
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rq->dr = kmalloc(sizeof(*rq->dr), mem_flags);
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if (!rq->dr) {
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kref_put(&rq->ref_count, destroy_async);
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return NULL;
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}
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rq->dr->bRequestType = requesttype;
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rq->dr->bRequest = request;
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rq->dr->wValue = cpu_to_le16(value);
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rq->dr->wIndex = cpu_to_le16(index);
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rq->dr->wLength = cpu_to_le16((request == 3) ? sizeof(rq->reg) : 0);
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usb_fill_control_urb(rq->urb, usbdev, (requesttype & 0x80) ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0),
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(unsigned char *)rq->dr,
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(request == 3) ? rq->reg : NULL, (request == 3) ? sizeof(rq->reg) : 0, async_complete, rq);
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/* rq->urb->transfer_flags |= URB_ASYNC_UNLINK; */
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spin_lock_irqsave(&priv->asynclock, flags);
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list_add_tail(&rq->asynclist, &priv->asynclist);
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spin_unlock_irqrestore(&priv->asynclock, flags);
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kref_get(&rq->ref_count);
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ret = usb_submit_urb(rq->urb, mem_flags);
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if (!ret)
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return rq;
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destroy_async(&rq->ref_count);
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dev_err(&usbdev->dev, "submit_async_request submit_urb failed with %d\n", ret);
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return NULL;
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}
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static unsigned int kill_all_async_requests_priv(struct parport_uss720_private *priv)
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{
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struct uss720_async_request *rq;
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unsigned long flags;
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unsigned int ret = 0;
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spin_lock_irqsave(&priv->asynclock, flags);
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list_for_each_entry(rq, &priv->asynclist, asynclist) {
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usb_unlink_urb(rq->urb);
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ret++;
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}
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spin_unlock_irqrestore(&priv->asynclock, flags);
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return ret;
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}
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/* --------------------------------------------------------------------- */
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static int get_1284_register(struct parport *pp, unsigned char reg, unsigned char *val, gfp_t mem_flags)
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{
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struct parport_uss720_private *priv;
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struct uss720_async_request *rq;
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static const unsigned char regindex[9] = {
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4, 0, 1, 5, 5, 0, 2, 3, 6
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};
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int ret;
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if (!pp)
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return -EIO;
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priv = pp->private_data;
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rq = submit_async_request(priv, 3, 0xc0, ((unsigned int)reg) << 8, 0, mem_flags);
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if (!rq) {
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dev_err(&priv->usbdev->dev, "get_1284_register(%u) failed",
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(unsigned int)reg);
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return -EIO;
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}
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if (!val) {
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kref_put(&rq->ref_count, destroy_async);
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return 0;
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}
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if (wait_for_completion_timeout(&rq->compl, HZ)) {
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ret = rq->urb->status;
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*val = priv->reg[(reg >= 9) ? 0 : regindex[reg]];
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if (ret)
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printk(KERN_WARNING "get_1284_register: "
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"usb error %d\n", ret);
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kref_put(&rq->ref_count, destroy_async);
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return ret;
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}
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printk(KERN_WARNING "get_1284_register timeout\n");
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kill_all_async_requests_priv(priv);
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return -EIO;
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}
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static int set_1284_register(struct parport *pp, unsigned char reg, unsigned char val, gfp_t mem_flags)
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{
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struct parport_uss720_private *priv;
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struct uss720_async_request *rq;
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if (!pp)
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return -EIO;
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priv = pp->private_data;
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rq = submit_async_request(priv, 4, 0x40, (((unsigned int)reg) << 8) | val, 0, mem_flags);
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if (!rq) {
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dev_err(&priv->usbdev->dev, "set_1284_register(%u,%u) failed",
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(unsigned int)reg, (unsigned int)val);
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return -EIO;
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}
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kref_put(&rq->ref_count, destroy_async);
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return 0;
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}
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/* --------------------------------------------------------------------- */
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/* ECR modes */
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#define ECR_SPP 00
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#define ECR_PS2 01
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#define ECR_PPF 02
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#define ECR_ECP 03
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#define ECR_EPP 04
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/* Safely change the mode bits in the ECR */
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static int change_mode(struct parport *pp, int m)
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{
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struct parport_uss720_private *priv = pp->private_data;
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int mode;
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__u8 reg;
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if (get_1284_register(pp, 6, ®, GFP_KERNEL))
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return -EIO;
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/* Bits <7:5> contain the mode. */
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mode = (priv->reg[2] >> 5) & 0x7;
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if (mode == m)
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return 0;
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/* We have to go through mode 000 or 001 */
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if (mode > ECR_PS2 && m > ECR_PS2)
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if (change_mode(pp, ECR_PS2))
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return -EIO;
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if (m <= ECR_PS2 && !(priv->reg[1] & 0x20)) {
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/* This mode resets the FIFO, so we may
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* have to wait for it to drain first. */
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unsigned long expire = jiffies + pp->physport->cad->timeout;
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switch (mode) {
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case ECR_PPF: /* Parallel Port FIFO mode */
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case ECR_ECP: /* ECP Parallel Port mode */
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/* Poll slowly. */
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for (;;) {
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if (get_1284_register(pp, 6, ®, GFP_KERNEL))
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return -EIO;
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if (priv->reg[2] & 0x01)
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break;
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if (time_after_eq (jiffies, expire))
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/* The FIFO is stuck. */
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return -EBUSY;
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msleep_interruptible(10);
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if (signal_pending (current))
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break;
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}
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}
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}
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/* Set the mode. */
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if (set_1284_register(pp, 6, m << 5, GFP_KERNEL))
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return -EIO;
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if (get_1284_register(pp, 6, ®, GFP_KERNEL))
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return -EIO;
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return 0;
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}
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/*
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* Clear TIMEOUT BIT in EPP MODE
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*/
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static int clear_epp_timeout(struct parport *pp)
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{
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unsigned char stat;
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if (get_1284_register(pp, 1, &stat, GFP_KERNEL))
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return 1;
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return stat & 1;
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}
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/*
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* Access functions.
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*/
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#if 0
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static int uss720_irq(int usbstatus, void *buffer, int len, void *dev_id)
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{
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struct parport *pp = (struct parport *)dev_id;
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struct parport_uss720_private *priv = pp->private_data;
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if (usbstatus != 0 || len < 4 || !buffer)
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return 1;
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memcpy(priv->reg, buffer, 4);
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/* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */
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if (priv->reg[2] & priv->reg[1] & 0x10)
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parport_generic_irq(pp);
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return 1;
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}
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#endif
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static void parport_uss720_write_data(struct parport *pp, unsigned char d)
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{
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set_1284_register(pp, 0, d, GFP_KERNEL);
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}
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static unsigned char parport_uss720_read_data(struct parport *pp)
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{
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unsigned char ret;
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if (get_1284_register(pp, 0, &ret, GFP_KERNEL))
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return 0;
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return ret;
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}
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static void parport_uss720_write_control(struct parport *pp, unsigned char d)
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{
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struct parport_uss720_private *priv = pp->private_data;
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d = (d & 0xf) | (priv->reg[1] & 0xf0);
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if (set_1284_register(pp, 2, d, GFP_KERNEL))
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return;
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priv->reg[1] = d;
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}
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static unsigned char parport_uss720_read_control(struct parport *pp)
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{
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struct parport_uss720_private *priv = pp->private_data;
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return priv->reg[1] & 0xf; /* Use soft copy */
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}
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static unsigned char parport_uss720_frob_control(struct parport *pp, unsigned char mask, unsigned char val)
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{
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struct parport_uss720_private *priv = pp->private_data;
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unsigned char d;
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mask &= 0x0f;
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val &= 0x0f;
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d = (priv->reg[1] & (~mask)) ^ val;
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if (set_1284_register(pp, 2, d, GFP_ATOMIC))
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return 0;
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priv->reg[1] = d;
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return d & 0xf;
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}
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static unsigned char parport_uss720_read_status(struct parport *pp)
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{
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unsigned char ret;
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if (get_1284_register(pp, 1, &ret, GFP_ATOMIC))
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return 0;
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return ret & 0xf8;
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}
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static void parport_uss720_disable_irq(struct parport *pp)
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{
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struct parport_uss720_private *priv = pp->private_data;
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unsigned char d;
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d = priv->reg[1] & ~0x10;
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if (set_1284_register(pp, 2, d, GFP_KERNEL))
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return;
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priv->reg[1] = d;
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}
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static void parport_uss720_enable_irq(struct parport *pp)
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{
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struct parport_uss720_private *priv = pp->private_data;
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unsigned char d;
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d = priv->reg[1] | 0x10;
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if (set_1284_register(pp, 2, d, GFP_KERNEL))
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return;
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priv->reg[1] = d;
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}
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static void parport_uss720_data_forward (struct parport *pp)
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{
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struct parport_uss720_private *priv = pp->private_data;
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unsigned char d;
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d = priv->reg[1] & ~0x20;
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if (set_1284_register(pp, 2, d, GFP_KERNEL))
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return;
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priv->reg[1] = d;
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}
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static void parport_uss720_data_reverse (struct parport *pp)
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{
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struct parport_uss720_private *priv = pp->private_data;
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unsigned char d;
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d = priv->reg[1] | 0x20;
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if (set_1284_register(pp, 2, d, GFP_KERNEL))
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return;
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priv->reg[1] = d;
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}
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static void parport_uss720_init_state(struct pardevice *dev, struct parport_state *s)
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{
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s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0);
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s->u.pc.ecr = 0x24;
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}
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static void parport_uss720_save_state(struct parport *pp, struct parport_state *s)
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{
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struct parport_uss720_private *priv = pp->private_data;
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#if 0
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if (get_1284_register(pp, 2, NULL, GFP_ATOMIC))
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return;
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#endif
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s->u.pc.ctr = priv->reg[1];
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s->u.pc.ecr = priv->reg[2];
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}
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static void parport_uss720_restore_state(struct parport *pp, struct parport_state *s)
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{
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struct parport_uss720_private *priv = pp->private_data;
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set_1284_register(pp, 2, s->u.pc.ctr, GFP_ATOMIC);
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set_1284_register(pp, 6, s->u.pc.ecr, GFP_ATOMIC);
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get_1284_register(pp, 2, NULL, GFP_ATOMIC);
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priv->reg[1] = s->u.pc.ctr;
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priv->reg[2] = s->u.pc.ecr;
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}
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static size_t parport_uss720_epp_read_data(struct parport *pp, void *buf, size_t length, int flags)
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{
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struct parport_uss720_private *priv = pp->private_data;
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size_t got = 0;
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if (change_mode(pp, ECR_EPP))
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return 0;
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for (; got < length; got++) {
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if (get_1284_register(pp, 4, (char *)buf, GFP_KERNEL))
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break;
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buf++;
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if (priv->reg[0] & 0x01) {
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clear_epp_timeout(pp);
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break;
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}
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}
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change_mode(pp, ECR_PS2);
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return got;
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}
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static size_t parport_uss720_epp_write_data(struct parport *pp, const void *buf, size_t length, int flags)
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{
|
|
#if 0
|
|
struct parport_uss720_private *priv = pp->private_data;
|
|
size_t written = 0;
|
|
|
|
if (change_mode(pp, ECR_EPP))
|
|
return 0;
|
|
for (; written < length; written++) {
|
|
if (set_1284_register(pp, 4, (char *)buf, GFP_KERNEL))
|
|
break;
|
|
((char*)buf)++;
|
|
if (get_1284_register(pp, 1, NULL, GFP_KERNEL))
|
|
break;
|
|
if (priv->reg[0] & 0x01) {
|
|
clear_epp_timeout(pp);
|
|
break;
|
|
}
|
|
}
|
|
change_mode(pp, ECR_PS2);
|
|
return written;
|
|
#else
|
|
struct parport_uss720_private *priv = pp->private_data;
|
|
struct usb_device *usbdev = priv->usbdev;
|
|
int rlen;
|
|
int i;
|
|
|
|
if (!usbdev)
|
|
return 0;
|
|
if (change_mode(pp, ECR_EPP))
|
|
return 0;
|
|
i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buf, length, &rlen, 20000);
|
|
if (i)
|
|
printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buf, length, rlen);
|
|
change_mode(pp, ECR_PS2);
|
|
return rlen;
|
|
#endif
|
|
}
|
|
|
|
static size_t parport_uss720_epp_read_addr(struct parport *pp, void *buf, size_t length, int flags)
|
|
{
|
|
struct parport_uss720_private *priv = pp->private_data;
|
|
size_t got = 0;
|
|
|
|
if (change_mode(pp, ECR_EPP))
|
|
return 0;
|
|
for (; got < length; got++) {
|
|
if (get_1284_register(pp, 3, (char *)buf, GFP_KERNEL))
|
|
break;
|
|
buf++;
|
|
if (priv->reg[0] & 0x01) {
|
|
clear_epp_timeout(pp);
|
|
break;
|
|
}
|
|
}
|
|
change_mode(pp, ECR_PS2);
|
|
return got;
|
|
}
|
|
|
|
static size_t parport_uss720_epp_write_addr(struct parport *pp, const void *buf, size_t length, int flags)
|
|
{
|
|
struct parport_uss720_private *priv = pp->private_data;
|
|
size_t written = 0;
|
|
|
|
if (change_mode(pp, ECR_EPP))
|
|
return 0;
|
|
for (; written < length; written++) {
|
|
if (set_1284_register(pp, 3, *(char *)buf, GFP_KERNEL))
|
|
break;
|
|
buf++;
|
|
if (get_1284_register(pp, 1, NULL, GFP_KERNEL))
|
|
break;
|
|
if (priv->reg[0] & 0x01) {
|
|
clear_epp_timeout(pp);
|
|
break;
|
|
}
|
|
}
|
|
change_mode(pp, ECR_PS2);
|
|
return written;
|
|
}
|
|
|
|
static size_t parport_uss720_ecp_write_data(struct parport *pp, const void *buffer, size_t len, int flags)
|
|
{
|
|
struct parport_uss720_private *priv = pp->private_data;
|
|
struct usb_device *usbdev = priv->usbdev;
|
|
int rlen;
|
|
int i;
|
|
|
|
if (!usbdev)
|
|
return 0;
|
|
if (change_mode(pp, ECR_ECP))
|
|
return 0;
|
|
i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000);
|
|
if (i)
|
|
printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buffer, len, rlen);
|
|
change_mode(pp, ECR_PS2);
|
|
return rlen;
|
|
}
|
|
|
|
static size_t parport_uss720_ecp_read_data(struct parport *pp, void *buffer, size_t len, int flags)
|
|
{
|
|
struct parport_uss720_private *priv = pp->private_data;
|
|
struct usb_device *usbdev = priv->usbdev;
|
|
int rlen;
|
|
int i;
|
|
|
|
if (!usbdev)
|
|
return 0;
|
|
if (change_mode(pp, ECR_ECP))
|
|
return 0;
|
|
i = usb_bulk_msg(usbdev, usb_rcvbulkpipe(usbdev, 2), buffer, len, &rlen, 20000);
|
|
if (i)
|
|
printk(KERN_ERR "uss720: recvbulk ep 2 buf %p len %Zu rlen %u\n", buffer, len, rlen);
|
|
change_mode(pp, ECR_PS2);
|
|
return rlen;
|
|
}
|
|
|
|
static size_t parport_uss720_ecp_write_addr(struct parport *pp, const void *buffer, size_t len, int flags)
|
|
{
|
|
size_t written = 0;
|
|
|
|
if (change_mode(pp, ECR_ECP))
|
|
return 0;
|
|
for (; written < len; written++) {
|
|
if (set_1284_register(pp, 5, *(char *)buffer, GFP_KERNEL))
|
|
break;
|
|
buffer++;
|
|
}
|
|
change_mode(pp, ECR_PS2);
|
|
return written;
|
|
}
|
|
|
|
static size_t parport_uss720_write_compat(struct parport *pp, const void *buffer, size_t len, int flags)
|
|
{
|
|
struct parport_uss720_private *priv = pp->private_data;
|
|
struct usb_device *usbdev = priv->usbdev;
|
|
int rlen;
|
|
int i;
|
|
|
|
if (!usbdev)
|
|
return 0;
|
|
if (change_mode(pp, ECR_PPF))
|
|
return 0;
|
|
i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000);
|
|
if (i)
|
|
printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buffer, len, rlen);
|
|
change_mode(pp, ECR_PS2);
|
|
return rlen;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static struct parport_operations parport_uss720_ops =
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.write_data = parport_uss720_write_data,
|
|
.read_data = parport_uss720_read_data,
|
|
|
|
.write_control = parport_uss720_write_control,
|
|
.read_control = parport_uss720_read_control,
|
|
.frob_control = parport_uss720_frob_control,
|
|
|
|
.read_status = parport_uss720_read_status,
|
|
|
|
.enable_irq = parport_uss720_enable_irq,
|
|
.disable_irq = parport_uss720_disable_irq,
|
|
|
|
.data_forward = parport_uss720_data_forward,
|
|
.data_reverse = parport_uss720_data_reverse,
|
|
|
|
.init_state = parport_uss720_init_state,
|
|
.save_state = parport_uss720_save_state,
|
|
.restore_state = parport_uss720_restore_state,
|
|
|
|
.epp_write_data = parport_uss720_epp_write_data,
|
|
.epp_read_data = parport_uss720_epp_read_data,
|
|
.epp_write_addr = parport_uss720_epp_write_addr,
|
|
.epp_read_addr = parport_uss720_epp_read_addr,
|
|
|
|
.ecp_write_data = parport_uss720_ecp_write_data,
|
|
.ecp_read_data = parport_uss720_ecp_read_data,
|
|
.ecp_write_addr = parport_uss720_ecp_write_addr,
|
|
|
|
.compat_write_data = parport_uss720_write_compat,
|
|
.nibble_read_data = parport_ieee1284_read_nibble,
|
|
.byte_read_data = parport_ieee1284_read_byte,
|
|
};
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int uss720_probe(struct usb_interface *intf,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct usb_device *usbdev = usb_get_dev(interface_to_usbdev(intf));
|
|
struct usb_host_interface *interface;
|
|
struct usb_host_endpoint *endpoint;
|
|
struct parport_uss720_private *priv;
|
|
struct parport *pp;
|
|
unsigned char reg;
|
|
int i;
|
|
|
|
dev_dbg(&intf->dev, "probe: vendor id 0x%x, device id 0x%x\n",
|
|
le16_to_cpu(usbdev->descriptor.idVendor),
|
|
le16_to_cpu(usbdev->descriptor.idProduct));
|
|
|
|
/* our known interfaces have 3 alternate settings */
|
|
if (intf->num_altsetting != 3) {
|
|
usb_put_dev(usbdev);
|
|
return -ENODEV;
|
|
}
|
|
i = usb_set_interface(usbdev, intf->altsetting->desc.bInterfaceNumber, 2);
|
|
dev_dbg(&intf->dev, "set interface result %d\n", i);
|
|
|
|
interface = intf->cur_altsetting;
|
|
|
|
if (interface->desc.bNumEndpoints < 3) {
|
|
usb_put_dev(usbdev);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Allocate parport interface
|
|
*/
|
|
priv = kzalloc(sizeof(struct parport_uss720_private), GFP_KERNEL);
|
|
if (!priv) {
|
|
usb_put_dev(usbdev);
|
|
return -ENOMEM;
|
|
}
|
|
priv->pp = NULL;
|
|
priv->usbdev = usbdev;
|
|
kref_init(&priv->ref_count);
|
|
spin_lock_init(&priv->asynclock);
|
|
INIT_LIST_HEAD(&priv->asynclist);
|
|
pp = parport_register_port(0, PARPORT_IRQ_NONE, PARPORT_DMA_NONE, &parport_uss720_ops);
|
|
if (!pp) {
|
|
printk(KERN_WARNING "uss720: could not register parport\n");
|
|
goto probe_abort;
|
|
}
|
|
|
|
priv->pp = pp;
|
|
pp->private_data = priv;
|
|
pp->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP | PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
|
|
|
|
/* set the USS720 control register to manual mode, no ECP compression, enable all ints */
|
|
set_1284_register(pp, 7, 0x00, GFP_KERNEL);
|
|
set_1284_register(pp, 6, 0x30, GFP_KERNEL); /* PS/2 mode */
|
|
set_1284_register(pp, 2, 0x0c, GFP_KERNEL);
|
|
/* debugging */
|
|
get_1284_register(pp, 0, ®, GFP_KERNEL);
|
|
dev_dbg(&intf->dev, "reg: %7ph\n", priv->reg);
|
|
|
|
endpoint = &interface->endpoint[2];
|
|
dev_dbg(&intf->dev, "epaddr %d interval %d\n",
|
|
endpoint->desc.bEndpointAddress, endpoint->desc.bInterval);
|
|
parport_announce_port(pp);
|
|
|
|
usb_set_intfdata(intf, pp);
|
|
return 0;
|
|
|
|
probe_abort:
|
|
kill_all_async_requests_priv(priv);
|
|
kref_put(&priv->ref_count, destroy_priv);
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void uss720_disconnect(struct usb_interface *intf)
|
|
{
|
|
struct parport *pp = usb_get_intfdata(intf);
|
|
struct parport_uss720_private *priv;
|
|
struct usb_device *usbdev;
|
|
|
|
dev_dbg(&intf->dev, "disconnect\n");
|
|
usb_set_intfdata(intf, NULL);
|
|
if (pp) {
|
|
priv = pp->private_data;
|
|
usbdev = priv->usbdev;
|
|
priv->usbdev = NULL;
|
|
priv->pp = NULL;
|
|
dev_dbg(&intf->dev, "parport_remove_port\n");
|
|
parport_remove_port(pp);
|
|
parport_put_port(pp);
|
|
kill_all_async_requests_priv(priv);
|
|
kref_put(&priv->ref_count, destroy_priv);
|
|
}
|
|
dev_dbg(&intf->dev, "disconnect done\n");
|
|
}
|
|
|
|
/* table of cables that work through this driver */
|
|
static const struct usb_device_id uss720_table[] = {
|
|
{ USB_DEVICE(0x047e, 0x1001) },
|
|
{ USB_DEVICE(0x0557, 0x2001) },
|
|
{ USB_DEVICE(0x0729, 0x1284) },
|
|
{ USB_DEVICE(0x1293, 0x0002) },
|
|
{ USB_DEVICE(0x050d, 0x0002) },
|
|
{ } /* Terminating entry */
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE (usb, uss720_table);
|
|
|
|
|
|
static struct usb_driver uss720_driver = {
|
|
.name = "uss720",
|
|
.probe = uss720_probe,
|
|
.disconnect = uss720_disconnect,
|
|
.id_table = uss720_table,
|
|
};
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int __init uss720_init(void)
|
|
{
|
|
int retval;
|
|
retval = usb_register(&uss720_driver);
|
|
if (retval)
|
|
goto out;
|
|
|
|
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
|
|
DRIVER_DESC "\n");
|
|
printk(KERN_INFO KBUILD_MODNAME ": NOTE: this is a special purpose "
|
|
"driver to allow nonstandard\n");
|
|
printk(KERN_INFO KBUILD_MODNAME ": protocols (eg. bitbang) over "
|
|
"USS720 usb to parallel cables\n");
|
|
printk(KERN_INFO KBUILD_MODNAME ": If you just want to connect to a "
|
|
"printer, use usblp instead\n");
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static void __exit uss720_cleanup(void)
|
|
{
|
|
usb_deregister(&uss720_driver);
|
|
}
|
|
|
|
module_init(uss720_init);
|
|
module_exit(uss720_cleanup);
|
|
|
|
/* --------------------------------------------------------------------- */
|