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linux/drivers/usb/misc/uss720.c
Yoann Padioleau 0da2f0f164 potential compiler error, irqfunc caller sites update 
In 7d12e780e0 David Howells performed
this evolution:
 "IRQ: Maintain regs pointer globally rather than passing to IRQ handlers"

He correctly updated many of the function definitions that were using this
extra regs pointer parameter but forgot to update some caller sites of
those functions.  The reason the modifications was not properly done on all
drivers is that some drivers were rarely compiled because they are for
AMIGA, or that some code sites were inside #ifdefs where the option is not
set or inside #if 0.

Here is the semantic patch that found the occurences
and fixed the problem.

@ rule1 @
identifier fn;
identifier irq, dev_id;
typedef irqreturn_t;
@@

static irqreturn_t fn(int irq, void *dev_id)
{
   ...
}

@@
identifier rule1.fn;
expression E1, E2, E3;
@@

 fn(E1, E2
-   ,E3
   )

Signed-off-by: Yoann Padioleau <padator@wanadoo.fr>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-06 10:23:43 -07:00

819 lines
22 KiB
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/*****************************************************************************/
/*
* uss720.c -- USS720 USB Parport Cable.
*
* Copyright (C) 1999, 2005
* Thomas Sailer (t.sailer@alumni.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.
*
* Based on parport_pc.c
*
* History:
* 0.1 04.08.1999 Created
* 0.2 07.08.1999 Some fixes mainly suggested by Tim Waugh
* Interrupt handling currently disabled because
* usb_request_irq crashes somewhere within ohci.c
* for no apparent reason (that is for me, anyway)
* ECP currently untested
* 0.3 10.08.1999 fixing merge errors
* 0.4 13.08.1999 Added Vendor/Product ID of Brad Hard's cable
* 0.5 20.09.1999 usb_control_msg wrapper used
* Nov01.2000 usb_device_table support by Adam J. Richter
* 08.04.2001 Identify version on module load. gb
* 0.6 02.09.2005 Fix "scheduling in interrupt" problem by making save/restore
* context asynchronous
*
*/
/*****************************************************************************/
#include <linux/module.h>
#include <linux/socket.h>
#include <linux/parport.h>
#include <linux/init.h>
#include <linux/usb.h>
#include <linux/delay.h>
#include <linux/completion.h>
#include <linux/kref.h>
/*
* Version Information
*/
#define DRIVER_VERSION "v0.6"
#define DRIVER_AUTHOR "Thomas M. Sailer, t.sailer@alumni.ethz.ch"
#define DRIVER_DESC "USB Parport Cable driver for Cables using the Lucent Technologies USS720 Chip"
/* --------------------------------------------------------------------- */
struct parport_uss720_private {
struct usb_device *usbdev;
struct parport *pp;
struct kref ref_count;
__u8 reg[7]; /* USB registers */
struct list_head asynclist;
spinlock_t asynclock;
};
struct uss720_async_request {
struct parport_uss720_private *priv;
struct kref ref_count;
struct list_head asynclist;
struct completion compl;
struct urb *urb;
struct usb_ctrlrequest dr;
__u8 reg[7];
};
/* --------------------------------------------------------------------- */
static void destroy_priv(struct kref *kref)
{
struct parport_uss720_private *priv = container_of(kref, struct parport_uss720_private, ref_count);
usb_put_dev(priv->usbdev);
kfree(priv);
dbg("destroying priv datastructure");
}
static void destroy_async(struct kref *kref)
{
struct uss720_async_request *rq = container_of(kref, struct uss720_async_request, ref_count);
struct parport_uss720_private *priv = rq->priv;
unsigned long flags;
if (likely(rq->urb))
usb_free_urb(rq->urb);
spin_lock_irqsave(&priv->asynclock, flags);
list_del_init(&rq->asynclist);
spin_unlock_irqrestore(&priv->asynclock, flags);
kfree(rq);
kref_put(&priv->ref_count, destroy_priv);
}
/* --------------------------------------------------------------------- */
static void async_complete(struct urb *urb)
{
struct uss720_async_request *rq;
struct parport *pp;
struct parport_uss720_private *priv;
rq = urb->context;
priv = rq->priv;
pp = priv->pp;
if (urb->status) {
err("async_complete: urb error %d", urb->status);
} else if (rq->dr.bRequest == 3) {
memcpy(priv->reg, rq->reg, sizeof(priv->reg));
#if 0
dbg("async_complete regs %02x %02x %02x %02x %02x %02x %02x",
(unsigned int)priv->reg[0], (unsigned int)priv->reg[1], (unsigned int)priv->reg[2],
(unsigned int)priv->reg[3], (unsigned int)priv->reg[4], (unsigned int)priv->reg[5],
(unsigned int)priv->reg[6]);
#endif
/* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */
if (rq->reg[2] & rq->reg[1] & 0x10 && pp)
parport_generic_irq(0, pp);
}
complete(&rq->compl);
kref_put(&rq->ref_count, destroy_async);
}
static struct uss720_async_request *submit_async_request(struct parport_uss720_private *priv,
__u8 request, __u8 requesttype, __u16 value, __u16 index,
gfp_t mem_flags)
{
struct usb_device *usbdev;
struct uss720_async_request *rq;
unsigned long flags;
int ret;
if (!priv)
return NULL;
usbdev = priv->usbdev;
if (!usbdev)
return NULL;
rq = kmalloc(sizeof(struct uss720_async_request), mem_flags);
if (!rq) {
err("submit_async_request out of memory");
return NULL;
}
kref_init(&rq->ref_count);
INIT_LIST_HEAD(&rq->asynclist);
init_completion(&rq->compl);
kref_get(&priv->ref_count);
rq->priv = priv;
rq->urb = usb_alloc_urb(0, mem_flags);
if (!rq->urb) {
kref_put(&rq->ref_count, destroy_async);
err("submit_async_request out of memory");
return NULL;
}
rq->dr.bRequestType = requesttype;
rq->dr.bRequest = request;
rq->dr.wValue = cpu_to_le16(value);
rq->dr.wIndex = cpu_to_le16(index);
rq->dr.wLength = cpu_to_le16((request == 3) ? sizeof(rq->reg) : 0);
usb_fill_control_urb(rq->urb, usbdev, (requesttype & 0x80) ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0),
(unsigned char *)&rq->dr,
(request == 3) ? rq->reg : NULL, (request == 3) ? sizeof(rq->reg) : 0, async_complete, rq);
/* rq->urb->transfer_flags |= URB_ASYNC_UNLINK; */
spin_lock_irqsave(&priv->asynclock, flags);
list_add_tail(&rq->asynclist, &priv->asynclist);
spin_unlock_irqrestore(&priv->asynclock, flags);
ret = usb_submit_urb(rq->urb, mem_flags);
if (!ret) {
kref_get(&rq->ref_count);
return rq;
}
kref_put(&rq->ref_count, destroy_async);
err("submit_async_request submit_urb failed with %d", ret);
return NULL;
}
static unsigned int kill_all_async_requests_priv(struct parport_uss720_private *priv)
{
struct uss720_async_request *rq;
unsigned long flags;
unsigned int ret = 0;
spin_lock_irqsave(&priv->asynclock, flags);
list_for_each_entry(rq, &priv->asynclist, asynclist) {
usb_unlink_urb(rq->urb);
ret++;
}
spin_unlock_irqrestore(&priv->asynclock, flags);
return ret;
}
/* --------------------------------------------------------------------- */
static int get_1284_register(struct parport *pp, unsigned char reg, unsigned char *val, gfp_t mem_flags)
{
struct parport_uss720_private *priv;
struct uss720_async_request *rq;
static const unsigned char regindex[9] = {
4, 0, 1, 5, 5, 0, 2, 3, 6
};
int ret;
if (!pp)
return -EIO;
priv = pp->private_data;
rq = submit_async_request(priv, 3, 0xc0, ((unsigned int)reg) << 8, 0, mem_flags);
if (!rq) {
err("get_1284_register(%u) failed", (unsigned int)reg);
return -EIO;
}
if (!val) {
kref_put(&rq->ref_count, destroy_async);
return 0;
}
if (wait_for_completion_timeout(&rq->compl, HZ)) {
ret = rq->urb->status;
*val = priv->reg[(reg >= 9) ? 0 : regindex[reg]];
if (ret)
warn("get_1284_register: usb error %d", ret);
kref_put(&rq->ref_count, destroy_async);
return ret;
}
warn("get_1284_register timeout");
kill_all_async_requests_priv(priv);
return -EIO;
}
static int set_1284_register(struct parport *pp, unsigned char reg, unsigned char val, gfp_t mem_flags)
{
struct parport_uss720_private *priv;
struct uss720_async_request *rq;
if (!pp)
return -EIO;
priv = pp->private_data;
rq = submit_async_request(priv, 4, 0x40, (((unsigned int)reg) << 8) | val, 0, mem_flags);
if (!rq) {
err("set_1284_register(%u,%u) failed", (unsigned int)reg, (unsigned int)val);
return -EIO;
}
kref_put(&rq->ref_count, destroy_async);
return 0;
}
/* --------------------------------------------------------------------- */
/* ECR modes */
#define ECR_SPP 00
#define ECR_PS2 01
#define ECR_PPF 02
#define ECR_ECP 03
#define ECR_EPP 04
/* Safely change the mode bits in the ECR */
static int change_mode(struct parport *pp, int m)
{
struct parport_uss720_private *priv = pp->private_data;
int mode;
__u8 reg;
if (get_1284_register(pp, 6, &reg, GFP_KERNEL))
return -EIO;
/* Bits <7:5> contain the mode. */
mode = (priv->reg[2] >> 5) & 0x7;
if (mode == m)
return 0;
/* We have to go through mode 000 or 001 */
if (mode > ECR_PS2 && m > ECR_PS2)
if (change_mode(pp, ECR_PS2))
return -EIO;
if (m <= ECR_PS2 && !(priv->reg[1] & 0x20)) {
/* This mode resets the FIFO, so we may
* have to wait for it to drain first. */
unsigned long expire = jiffies + pp->physport->cad->timeout;
switch (mode) {
case ECR_PPF: /* Parallel Port FIFO mode */
case ECR_ECP: /* ECP Parallel Port mode */
/* Poll slowly. */
for (;;) {
if (get_1284_register(pp, 6, &reg, GFP_KERNEL))
return -EIO;
if (priv->reg[2] & 0x01)
break;
if (time_after_eq (jiffies, expire))
/* The FIFO is stuck. */
return -EBUSY;
msleep_interruptible(10);
if (signal_pending (current))
break;
}
}
}
/* Set the mode. */
if (set_1284_register(pp, 6, m << 5, GFP_KERNEL))
return -EIO;
if (get_1284_register(pp, 6, &reg, GFP_KERNEL))
return -EIO;
return 0;
}
/*
* Clear TIMEOUT BIT in EPP MODE
*/
static int clear_epp_timeout(struct parport *pp)
{
unsigned char stat;
if (get_1284_register(pp, 1, &stat, GFP_KERNEL))
return 1;
return stat & 1;
}
/*
* Access functions.
*/
#if 0
static int uss720_irq(int usbstatus, void *buffer, int len, void *dev_id)
{
struct parport *pp = (struct parport *)dev_id;
struct parport_uss720_private *priv = pp->private_data;
if (usbstatus != 0 || len < 4 || !buffer)
return 1;
memcpy(priv->reg, buffer, 4);
/* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */
if (priv->reg[2] & priv->reg[1] & 0x10)
parport_generic_irq(0, pp);
return 1;
}
#endif
static void parport_uss720_write_data(struct parport *pp, unsigned char d)
{
set_1284_register(pp, 0, d, GFP_KERNEL);
}
static unsigned char parport_uss720_read_data(struct parport *pp)
{
unsigned char ret;
if (get_1284_register(pp, 0, &ret, GFP_KERNEL))
return 0;
return ret;
}
static void parport_uss720_write_control(struct parport *pp, unsigned char d)
{
struct parport_uss720_private *priv = pp->private_data;
d = (d & 0xf) | (priv->reg[1] & 0xf0);
if (set_1284_register(pp, 2, d, GFP_KERNEL))
return;
priv->reg[1] = d;
}
static unsigned char parport_uss720_read_control(struct parport *pp)
{
struct parport_uss720_private *priv = pp->private_data;
return priv->reg[1] & 0xf; /* Use soft copy */
}
static unsigned char parport_uss720_frob_control(struct parport *pp, unsigned char mask, unsigned char val)
{
struct parport_uss720_private *priv = pp->private_data;
unsigned char d;
mask &= 0x0f;
val &= 0x0f;
d = (priv->reg[1] & (~mask)) ^ val;
if (set_1284_register(pp, 2, d, GFP_KERNEL))
return 0;
priv->reg[1] = d;
return d & 0xf;
}
static unsigned char parport_uss720_read_status(struct parport *pp)
{
unsigned char ret;
if (get_1284_register(pp, 1, &ret, GFP_KERNEL))
return 0;
return ret & 0xf8;
}
static void parport_uss720_disable_irq(struct parport *pp)
{
struct parport_uss720_private *priv = pp->private_data;
unsigned char d;
d = priv->reg[1] & ~0x10;
if (set_1284_register(pp, 2, d, GFP_KERNEL))
return;
priv->reg[1] = d;
}
static void parport_uss720_enable_irq(struct parport *pp)
{
struct parport_uss720_private *priv = pp->private_data;
unsigned char d;
d = priv->reg[1] | 0x10;
if (set_1284_register(pp, 2, d, GFP_KERNEL))
return;
priv->reg[1] = d;
}
static void parport_uss720_data_forward (struct parport *pp)
{
struct parport_uss720_private *priv = pp->private_data;
unsigned char d;
d = priv->reg[1] & ~0x20;
if (set_1284_register(pp, 2, d, GFP_KERNEL))
return;
priv->reg[1] = d;
}
static void parport_uss720_data_reverse (struct parport *pp)
{
struct parport_uss720_private *priv = pp->private_data;
unsigned char d;
d = priv->reg[1] | 0x20;
if (set_1284_register(pp, 2, d, GFP_KERNEL))
return;
priv->reg[1] = d;
}
static void parport_uss720_init_state(struct pardevice *dev, struct parport_state *s)
{
s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0);
s->u.pc.ecr = 0x24;
}
static void parport_uss720_save_state(struct parport *pp, struct parport_state *s)
{
struct parport_uss720_private *priv = pp->private_data;
#if 0
if (get_1284_register(pp, 2, NULL, GFP_ATOMIC))
return;
#endif
s->u.pc.ctr = priv->reg[1];
s->u.pc.ecr = priv->reg[2];
}
static void parport_uss720_restore_state(struct parport *pp, struct parport_state *s)
{
struct parport_uss720_private *priv = pp->private_data;
set_1284_register(pp, 2, s->u.pc.ctr, GFP_ATOMIC);
set_1284_register(pp, 6, s->u.pc.ecr, GFP_ATOMIC);
get_1284_register(pp, 2, NULL, GFP_ATOMIC);
priv->reg[1] = s->u.pc.ctr;
priv->reg[2] = s->u.pc.ecr;
}
static size_t parport_uss720_epp_read_data(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, 4, (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_data(struct parport *pp, const void *buf, size_t length, int flags)
{
#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;
dbg("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);
dbg("set inteface result %d", i);
interface = intf->cur_altsetting;
/*
* Allocate parport interface
*/
if (!(priv = kzalloc(sizeof(struct parport_uss720_private), GFP_KERNEL))) {
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);
if (!(pp = parport_register_port(0, PARPORT_IRQ_NONE, PARPORT_DMA_NONE, &parport_uss720_ops))) {
warn("could not register parport");
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, &reg, GFP_KERNEL);
dbg("reg: %02x %02x %02x %02x %02x %02x %02x",
priv->reg[0], priv->reg[1], priv->reg[2], priv->reg[3], priv->reg[4], priv->reg[5], priv->reg[6]);
endpoint = &interface->endpoint[2];
dbg("epaddr %d interval %d", 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;
dbg("disconnect");
usb_set_intfdata(intf, NULL);
if (pp) {
priv = pp->private_data;
usbdev = priv->usbdev;
priv->usbdev = NULL;
priv->pp = NULL;
dbg("parport_remove_port");
parport_remove_port(pp);
parport_put_port(pp);
kill_all_async_requests_priv(priv);
kref_put(&priv->ref_count, destroy_priv);
}
dbg("disconnect done");
}
/* table of cables that work through this driver */
static struct usb_device_id uss720_table [] = {
{ USB_DEVICE(0x047e, 0x1001) },
{ USB_DEVICE(0x0557, 0x2001) },
{ USB_DEVICE(0x0729, 0x1284) },
{ USB_DEVICE(0x1293, 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;
info(DRIVER_VERSION ":" DRIVER_DESC);
info("NOTE: this is a special purpose driver to allow nonstandard");
info("protocols (eg. bitbang) over USS720 usb to parallel cables");
info("If you just want to connect to a printer, use usblp instead");
out:
return retval;
}
static void __exit uss720_cleanup(void)
{
usb_deregister(&uss720_driver);
}
module_init(uss720_init);
module_exit(uss720_cleanup);
/* --------------------------------------------------------------------- */
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