diff options
Diffstat (limited to 'kernel/drivers/usb/misc/uss720.c')
| -rw-r--r-- | kernel/drivers/usb/misc/uss720.c | 832 |
1 files changed, 832 insertions, 0 deletions
diff --git a/kernel/drivers/usb/misc/uss720.c b/kernel/drivers/usb/misc/uss720.c new file mode 100644 index 000000000..588d62a73 --- /dev/null +++ b/kernel/drivers/usb/misc/uss720.c @@ -0,0 +1,832 @@ +/*****************************************************************************/ + +/* + * uss720.c -- USS720 USB Parport Cable. + * + * Copyright (C) 1999, 2005, 2010 + * 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> +#include <linux/slab.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); + + dev_dbg(&priv->usbdev->dev, "destroying priv datastructure\n"); + usb_put_dev(priv->usbdev); + kfree(priv); +} + +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); + kfree(rq->dr); + 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; + int status = urb->status; + + rq = urb->context; + priv = rq->priv; + pp = priv->pp; + if (status) { + dev_err(&urb->dev->dev, "async_complete: urb error %d\n", + status); + } else if (rq->dr->bRequest == 3) { + memcpy(priv->reg, rq->reg, sizeof(priv->reg)); +#if 0 + dev_dbg(&priv->usbdev->dev, "async_complete regs %7ph\n", + priv->reg); +#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(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 = kzalloc(sizeof(struct uss720_async_request), mem_flags); + if (!rq) { + dev_err(&usbdev->dev, "submit_async_request out of memory\n"); + 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); + dev_err(&usbdev->dev, "submit_async_request out of memory\n"); + return NULL; + } + rq->dr = kmalloc(sizeof(*rq->dr), mem_flags); + if (!rq->dr) { + kref_put(&rq->ref_count, destroy_async); + 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); + kref_get(&rq->ref_count); + ret = usb_submit_urb(rq->urb, mem_flags); + if (!ret) + return rq; + destroy_async(&rq->ref_count); + dev_err(&usbdev->dev, "submit_async_request submit_urb failed with %d\n", 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) { + dev_err(&priv->usbdev->dev, "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) + printk(KERN_WARNING "get_1284_register: " + "usb error %d\n", ret); + kref_put(&rq->ref_count, destroy_async); + return ret; + } + printk(KERN_WARNING "get_1284_register timeout\n"); + 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) { + dev_err(&priv->usbdev->dev, "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, ®, 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, ®, 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, ®, 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(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; + + 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; + + /* + * 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))) { + 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); + +/* --------------------------------------------------------------------- */ |