Signed-off-by: Jarod Wilson <jarod@xxxxxxxxxx> --- drivers/staging/lirc/lirc_sasem.c | 933 +++++++++++++++++++++++++++++++++++++ 1 files changed, 933 insertions(+), 0 deletions(-) create mode 100644 drivers/staging/lirc/lirc_sasem.c diff --git a/drivers/staging/lirc/lirc_sasem.c b/drivers/staging/lirc/lirc_sasem.c new file mode 100644 index 0000000..9e516a1 --- /dev/null +++ b/drivers/staging/lirc/lirc_sasem.c @@ -0,0 +1,933 @@ +/* + * lirc_sasem.c - USB remote support for LIRC + * Version 0.5 + * + * Copyright (C) 2004-2005 Oliver Stabel <oliver.stabel@xxxxxx> + * Tim Davies <tim@xxxxxxxxxxxxxxxxxx> + * + * This driver was derived from: + * Venky Raju <dev@xxxxxxxx> + * "lirc_imon - "LIRC/VFD driver for Ahanix/Soundgraph IMON IR/VFD" + * Paul Miller <pmiller9@xxxxxxxxxxxxxxxxxxxxx>'s 2003-2004 + * "lirc_atiusb - USB remote support for LIRC" + * Culver Consulting Services <henry@xxxxxxxxxx>'s 2003 + * "Sasem OnAir VFD/IR USB driver" + * + * + * NOTE - The LCDproc iMon driver should work with this module. More info at + * http://www.frogstorm.info/sasem + */ + +/* + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/uaccess.h> +#include <linux/usb.h> + +#include <media/lirc.h> +#include <media/lirc_dev.h> + + +#define MOD_AUTHOR "Oliver Stabel <oliver.stabel@xxxxxx>, " \ + "Tim Davies <tim@xxxxxxxxxxxxxxxxxx>" +#define MOD_DESC "USB Driver for Sasem Remote Controller V1.1" +#define MOD_NAME "lirc_sasem" +#define MOD_VERSION "0.5" + +#define VFD_MINOR_BASE 144 /* Same as LCD */ +#define DEVICE_NAME "lcd%d" + +#define BUF_CHUNK_SIZE 8 +#define BUF_SIZE 128 + +#define IOCTL_LCD_CONTRAST 1 + +/*** P R O T O T Y P E S ***/ + +/* USB Callback prototypes */ +static int sasem_probe(struct usb_interface *interface, + const struct usb_device_id *id); +static void sasem_disconnect(struct usb_interface *interface); +static void usb_rx_callback(struct urb *urb); +static void usb_tx_callback(struct urb *urb); + +/* VFD file_operations function prototypes */ +static int vfd_open(struct inode *inode, struct file *file); +static long vfd_ioctl(struct file *file, unsigned cmd, unsigned long arg); +static int vfd_close(struct inode *inode, struct file *file); +static ssize_t vfd_write(struct file *file, const char *buf, + size_t n_bytes, loff_t *pos); + +/* LIRC driver function prototypes */ +static int ir_open(void *data); +static void ir_close(void *data); + +/* Driver init/exit prototypes */ +static int __init sasem_init(void); +static void __exit sasem_exit(void); + +/*** G L O B A L S ***/ +#define SASEM_DATA_BUF_SZ 32 + +struct sasem_context { + + struct usb_device *dev; + int vfd_isopen; /* VFD port has been opened */ + unsigned int vfd_contrast; /* VFD contrast */ + int ir_isopen; /* IR port has been opened */ + int dev_present; /* USB device presence */ + struct mutex ctx_lock; /* to lock this object */ + wait_queue_head_t remove_ok; /* For unexpected USB disconnects */ + + struct lirc_driver *driver; + struct usb_endpoint_descriptor *rx_endpoint; + struct usb_endpoint_descriptor *tx_endpoint; + struct urb *rx_urb; + struct urb *tx_urb; + unsigned char usb_rx_buf[8]; + unsigned char usb_tx_buf[8]; + + struct tx_t { + unsigned char data_buf[SASEM_DATA_BUF_SZ]; /* user data buffer */ + struct completion finished; /* wait for write to finish */ + atomic_t busy; /* write in progress */ + int status; /* status of tx completion */ + } tx; + + /* for dealing with repeat codes (wish there was a toggle bit!) */ + struct timeval presstime; + char lastcode[8]; + int codesaved; +}; + +/* VFD file operations */ +static struct file_operations vfd_fops = { + .owner = THIS_MODULE, + .open = &vfd_open, + .write = &vfd_write, + .unlocked_ioctl = &vfd_ioctl, + .release = &vfd_close, +}; + +/* USB Device ID for Sasem USB Control Board */ +static struct usb_device_id sasem_usb_id_table[] = { + /* Sasem USB Control Board */ + { USB_DEVICE(0x11ba, 0x0101) }, + /* Terminating entry */ + {} +}; + +/* USB Device data */ +static struct usb_driver sasem_driver = { + .name = MOD_NAME, + .probe = sasem_probe, + .disconnect = sasem_disconnect, + .id_table = sasem_usb_id_table, +}; + +static struct usb_class_driver sasem_class = { + .name = DEVICE_NAME, + .fops = &vfd_fops, + .minor_base = VFD_MINOR_BASE, +}; + +/* to prevent races between open() and disconnect() */ +static DEFINE_MUTEX(disconnect_lock); + +static int debug; + + +/*** M O D U L E C O D E ***/ + +MODULE_AUTHOR(MOD_AUTHOR); +MODULE_DESCRIPTION(MOD_DESC); +MODULE_LICENSE("GPL"); +module_param(debug, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)"); + +static void delete_context(struct sasem_context *context) +{ + usb_free_urb(context->tx_urb); /* VFD */ + usb_free_urb(context->rx_urb); /* IR */ + lirc_buffer_free(context->driver->rbuf); + kfree(context->driver->rbuf); + kfree(context->driver); + kfree(context); + + if (debug) + printk(KERN_INFO "%s: context deleted\n", __func__); +} + +static void deregister_from_lirc(struct sasem_context *context) +{ + int retval; + int minor = context->driver->minor; + + retval = lirc_unregister_driver(minor); + if (retval) + err("%s: unable to deregister from lirc (%d)", + __func__, retval); + else + printk(KERN_INFO "Deregistered Sasem driver (minor:%d)\n", + minor); + +} + +/** + * Called when the VFD device (e.g. /dev/usb/lcd) + * is opened by the application. + */ +static int vfd_open(struct inode *inode, struct file *file) +{ + struct usb_interface *interface; + struct sasem_context *context = NULL; + int subminor; + int retval = 0; + + /* prevent races with disconnect */ + mutex_lock(&disconnect_lock); + + subminor = iminor(inode); + interface = usb_find_interface(&sasem_driver, subminor); + if (!interface) { + err("%s: could not find interface for minor %d", + __func__, subminor); + retval = -ENODEV; + goto exit; + } + context = usb_get_intfdata(interface); + + if (!context) { + err("%s: no context found for minor %d", + __func__, subminor); + retval = -ENODEV; + goto exit; + } + + mutex_lock(&context->ctx_lock); + + if (context->vfd_isopen) { + err("%s: VFD port is already open", __func__); + retval = -EBUSY; + } else { + context->vfd_isopen = 1; + file->private_data = context; + printk(KERN_INFO "VFD port opened\n"); + } + + mutex_unlock(&context->ctx_lock); + +exit: + mutex_unlock(&disconnect_lock); + return retval; +} + +/** + * Called when the VFD device (e.g. /dev/usb/lcd) + * is closed by the application. + */ +static long vfd_ioctl(struct file *file, unsigned cmd, unsigned long arg) +{ + struct sasem_context *context = NULL; + + context = (struct sasem_context *) file->private_data; + + if (!context) { + err("%s: no context for device", __func__); + return -ENODEV; + } + + mutex_lock(&context->ctx_lock); + + switch (cmd) { + case IOCTL_LCD_CONTRAST: + if (arg > 1000) + arg = 1000; + context->vfd_contrast = (unsigned int)arg; + break; + default: + printk(KERN_INFO "Unknown IOCTL command\n"); + mutex_unlock(&context->ctx_lock); + return -ENOIOCTLCMD; /* not supported */ + } + + mutex_unlock(&context->ctx_lock); + return 0; +} + +/** + * Called when the VFD device (e.g. /dev/usb/lcd) + * is closed by the application. + */ +static int vfd_close(struct inode *inode, struct file *file) +{ + struct sasem_context *context = NULL; + int retval = 0; + + context = (struct sasem_context *) file->private_data; + + if (!context) { + err("%s: no context for device", __func__); + return -ENODEV; + } + + mutex_lock(&context->ctx_lock); + + if (!context->vfd_isopen) { + err("%s: VFD is not open", __func__); + retval = -EIO; + } else { + context->vfd_isopen = 0; + printk(KERN_INFO "VFD port closed\n"); + if (!context->dev_present && !context->ir_isopen) { + + /* Device disconnected before close and IR port is + * not open. If IR port is open, context will be + * deleted by ir_close. */ + mutex_unlock(&context->ctx_lock); + delete_context(context); + return retval; + } + } + + mutex_unlock(&context->ctx_lock); + return retval; +} + +/** + * Sends a packet to the VFD. + */ +static int send_packet(struct sasem_context *context) +{ + unsigned int pipe; + int interval = 0; + int retval = 0; + + pipe = usb_sndintpipe(context->dev, + context->tx_endpoint->bEndpointAddress); + interval = context->tx_endpoint->bInterval; + + usb_fill_int_urb(context->tx_urb, context->dev, pipe, + context->usb_tx_buf, sizeof(context->usb_tx_buf), + usb_tx_callback, context, interval); + + context->tx_urb->actual_length = 0; + + init_completion(&context->tx.finished); + atomic_set(&(context->tx.busy), 1); + + retval = usb_submit_urb(context->tx_urb, GFP_KERNEL); + if (retval) { + atomic_set(&(context->tx.busy), 0); + err("%s: error submitting urb (%d)", __func__, retval); + } else { + /* Wait for transmission to complete (or abort) */ + mutex_unlock(&context->ctx_lock); + wait_for_completion(&context->tx.finished); + mutex_lock(&context->ctx_lock); + + retval = context->tx.status; + if (retval) + err("%s: packet tx failed (%d)", __func__, retval); + } + + return retval; +} + +/** + * Writes data to the VFD. The Sasem VFD is 2x16 characters + * and requires data in 9 consecutive USB interrupt packets, + * each packet carrying 8 bytes. + */ +static ssize_t vfd_write(struct file *file, const char *buf, + size_t n_bytes, loff_t *pos) +{ + int i; + int retval = 0; + struct sasem_context *context; + int *data_buf; + + context = (struct sasem_context *) file->private_data; + if (!context) { + err("%s: no context for device", __func__); + return -ENODEV; + } + + mutex_lock(&context->ctx_lock); + + if (!context->dev_present) { + err("%s: no Sasem device present", __func__); + retval = -ENODEV; + goto exit; + } + + if (n_bytes <= 0 || n_bytes > SASEM_DATA_BUF_SZ) { + err("%s: invalid payload size", __func__); + retval = -EINVAL; + goto exit; + } + + data_buf = memdup_user(buf, n_bytes); + if (PTR_ERR(data_buf)) + return PTR_ERR(data_buf); + + memcpy(context->tx.data_buf, data_buf, n_bytes); + + /* Pad with spaces */ + for (i = n_bytes; i < SASEM_DATA_BUF_SZ; ++i) + context->tx.data_buf[i] = ' '; + + /* Nine 8 byte packets to be sent */ + /* NOTE: "\x07\x01\0\0\0\0\0\0" or "\x0c\0\0\0\0\0\0\0" + * will clear the VFD */ + for (i = 0; i < 9; i++) { + switch (i) { + case 0: + memcpy(context->usb_tx_buf, "\x07\0\0\0\0\0\0\0", 8); + context->usb_tx_buf[1] = (context->vfd_contrast) ? + (0x2B - (context->vfd_contrast - 1) / 250) + : 0x2B; + break; + case 1: + memcpy(context->usb_tx_buf, "\x09\x01\0\0\0\0\0\0", 8); + break; + case 2: + memcpy(context->usb_tx_buf, "\x0b\x01\0\0\0\0\0\0", 8); + break; + case 3: + memcpy(context->usb_tx_buf, context->tx.data_buf, 8); + break; + case 4: + memcpy(context->usb_tx_buf, + context->tx.data_buf + 8, 8); + break; + case 5: + memcpy(context->usb_tx_buf, "\x09\x01\0\0\0\0\0\0", 8); + break; + case 6: + memcpy(context->usb_tx_buf, "\x0b\x02\0\0\0\0\0\0", 8); + break; + case 7: + memcpy(context->usb_tx_buf, + context->tx.data_buf + 16, 8); + break; + case 8: + memcpy(context->usb_tx_buf, + context->tx.data_buf + 24, 8); + break; + } + retval = send_packet(context); + if (retval) { + + err("%s: send packet failed for packet #%d", + __func__, i); + goto exit; + } + } +exit: + + mutex_unlock(&context->ctx_lock); + + return (!retval) ? n_bytes : retval; +} + +/** + * Callback function for USB core API: transmit data + */ +static void usb_tx_callback(struct urb *urb) +{ + struct sasem_context *context; + + if (!urb) + return; + context = (struct sasem_context *) urb->context; + if (!context) + return; + + context->tx.status = urb->status; + + /* notify waiters that write has finished */ + atomic_set(&context->tx.busy, 0); + complete(&context->tx.finished); + + return; +} + +/** + * Called by lirc_dev when the application opens /dev/lirc + */ +static int ir_open(void *data) +{ + int retval = 0; + struct sasem_context *context; + + /* prevent races with disconnect */ + mutex_lock(&disconnect_lock); + + context = (struct sasem_context *) data; + + mutex_lock(&context->ctx_lock); + + if (context->ir_isopen) { + err("%s: IR port is already open", __func__); + retval = -EBUSY; + goto exit; + } + + usb_fill_int_urb(context->rx_urb, context->dev, + usb_rcvintpipe(context->dev, + context->rx_endpoint->bEndpointAddress), + context->usb_rx_buf, sizeof(context->usb_rx_buf), + usb_rx_callback, context, context->rx_endpoint->bInterval); + + retval = usb_submit_urb(context->rx_urb, GFP_KERNEL); + + if (retval) + err("%s: usb_submit_urb failed for ir_open (%d)", + __func__, retval); + else { + context->ir_isopen = 1; + printk(KERN_INFO "IR port opened\n"); + } + +exit: + mutex_unlock(&context->ctx_lock); + + mutex_unlock(&disconnect_lock); + return 0; +} + +/** + * Called by lirc_dev when the application closes /dev/lirc + */ +static void ir_close(void *data) +{ + struct sasem_context *context; + + context = (struct sasem_context *)data; + if (!context) { + err("%s: no context for device", __func__); + return; + } + + mutex_lock(&context->ctx_lock); + + usb_kill_urb(context->rx_urb); + context->ir_isopen = 0; + printk(KERN_INFO "IR port closed\n"); + + if (!context->dev_present) { + + /* + * Device disconnected while IR port was + * still open. Driver was not deregistered + * at disconnect time, so do it now. + */ + deregister_from_lirc(context); + + if (!context->vfd_isopen) { + + mutex_unlock(&context->ctx_lock); + delete_context(context); + return; + } + /* If VFD port is open, context will be deleted by vfd_close */ + } + + mutex_unlock(&context->ctx_lock); + return; +} + +/** + * Process the incoming packet + */ +static void incoming_packet(struct sasem_context *context, + struct urb *urb) +{ + int len = urb->actual_length; + unsigned char *buf = urb->transfer_buffer; + long ms; + struct timeval tv; + + if (len != 8) { + printk(KERN_WARNING "%s: invalid incoming packet size (%d)\n", + __func__, len); + return; + } + +#ifdef DEBUG + int i; + for (i = 0; i < 8; ++i) + printk(KERN_INFO "%02x ", buf[i]); + printk(KERN_INFO "\n"); +#endif + + /* + * Lirc could deal with the repeat code, but we really need to block it + * if it arrives too late. Otherwise we could repeat the wrong code. + */ + + /* get the time since the last button press */ + do_gettimeofday(&tv); + ms = (tv.tv_sec - context->presstime.tv_sec) * 1000 + + (tv.tv_usec - context->presstime.tv_usec) / 1000; + + if (memcmp(buf, "\x08\0\0\0\0\0\0\0", 8) == 0) { + /* + * the repeat code is being sent, so we copy + * the old code to LIRC + */ + + /* + * NOTE: Only if the last code was less than 250ms ago + * - no one should be able to push another (undetected) button + * in that time and then get a false repeat of the previous + * press but it is long enough for a genuine repeat + */ + if ((ms < 250) && (context->codesaved != 0)) { + memcpy(buf, &context->lastcode, 8); + context->presstime.tv_sec = tv.tv_sec; + context->presstime.tv_usec = tv.tv_usec; + } + } else { + /* save the current valid code for repeats */ + memcpy(&context->lastcode, buf, 8); + /* + * set flag to signal a valid code was save; + * just for safety reasons + */ + context->codesaved = 1; + context->presstime.tv_sec = tv.tv_sec; + context->presstime.tv_usec = tv.tv_usec; + } + + lirc_buffer_write(context->driver->rbuf, buf); + wake_up(&context->driver->rbuf->wait_poll); +} + +/** + * Callback function for USB core API: receive data + */ +static void usb_rx_callback(struct urb *urb) +{ + struct sasem_context *context; + + if (!urb) + return; + context = (struct sasem_context *) urb->context; + if (!context) + return; + + switch (urb->status) { + + case -ENOENT: /* usbcore unlink successful! */ + return; + + case 0: + if (context->ir_isopen) + incoming_packet(context, urb); + break; + + default: + printk(KERN_WARNING "%s: status (%d): ignored", + __func__, urb->status); + break; + } + + usb_submit_urb(context->rx_urb, GFP_ATOMIC); + return; +} + + + +/** + * Callback function for USB core API: Probe + */ +static int sasem_probe(struct usb_interface *interface, + const struct usb_device_id *id) +{ + struct usb_device *dev = NULL; + struct usb_host_interface *iface_desc = NULL; + struct usb_endpoint_descriptor *rx_endpoint = NULL; + struct usb_endpoint_descriptor *tx_endpoint = NULL; + struct urb *rx_urb = NULL; + struct urb *tx_urb = NULL; + struct lirc_driver *driver = NULL; + struct lirc_buffer *rbuf = NULL; + int lirc_minor = 0; + int num_endpoints; + int retval = 0; + int vfd_ep_found; + int ir_ep_found; + int alloc_status; + struct sasem_context *context = NULL; + int i; + + printk(KERN_INFO "%s: found Sasem device\n", __func__); + + + dev = usb_get_dev(interface_to_usbdev(interface)); + iface_desc = interface->cur_altsetting; + num_endpoints = iface_desc->desc.bNumEndpoints; + + /* + * Scan the endpoint list and set: + * first input endpoint = IR endpoint + * first output endpoint = VFD endpoint + */ + + ir_ep_found = 0; + vfd_ep_found = 0; + + for (i = 0; i < num_endpoints && !(ir_ep_found && vfd_ep_found); ++i) { + + struct usb_endpoint_descriptor *ep; + int ep_dir; + int ep_type; + ep = &iface_desc->endpoint [i].desc; + ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK; + ep_type = ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; + + if (!ir_ep_found && + ep_dir == USB_DIR_IN && + ep_type == USB_ENDPOINT_XFER_INT) { + + rx_endpoint = ep; + ir_ep_found = 1; + if (debug) + printk(KERN_INFO "%s: found IR endpoint\n", + __func__); + + } else if (!vfd_ep_found && + ep_dir == USB_DIR_OUT && + ep_type == USB_ENDPOINT_XFER_INT) { + + tx_endpoint = ep; + vfd_ep_found = 1; + if (debug) + printk(KERN_INFO "%s: found VFD endpoint\n", + __func__); + } + } + + /* Input endpoint is mandatory */ + if (!ir_ep_found) { + + err("%s: no valid input (IR) endpoint found.", __func__); + retval = -ENODEV; + goto exit; + } + + if (!vfd_ep_found) + printk(KERN_INFO "%s: no valid output (VFD) endpoint found.\n", + __func__); + + + /* Allocate memory */ + alloc_status = 0; + + context = kzalloc(sizeof(struct sasem_context), GFP_KERNEL); + if (!context) { + err("%s: kzalloc failed for context", __func__); + alloc_status = 1; + goto alloc_status_switch; + } + driver = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL); + if (!driver) { + err("%s: kzalloc failed for lirc_driver", __func__); + alloc_status = 2; + goto alloc_status_switch; + } + rbuf = kmalloc(sizeof(struct lirc_buffer), GFP_KERNEL); + if (!rbuf) { + err("%s: kmalloc failed for lirc_buffer", __func__); + alloc_status = 3; + goto alloc_status_switch; + } + if (lirc_buffer_init(rbuf, BUF_CHUNK_SIZE, BUF_SIZE)) { + err("%s: lirc_buffer_init failed", __func__); + alloc_status = 4; + goto alloc_status_switch; + } + rx_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!rx_urb) { + err("%s: usb_alloc_urb failed for IR urb", __func__); + alloc_status = 5; + goto alloc_status_switch; + } + if (vfd_ep_found) { + tx_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!tx_urb) { + err("%s: usb_alloc_urb failed for VFD urb", + __func__); + alloc_status = 6; + goto alloc_status_switch; + } + } + + mutex_init(&context->ctx_lock); + + strcpy(driver->name, MOD_NAME); + driver->minor = -1; + driver->code_length = 64; + driver->sample_rate = 0; + driver->features = LIRC_CAN_REC_LIRCCODE; + driver->data = context; + driver->rbuf = rbuf; + driver->set_use_inc = ir_open; + driver->set_use_dec = ir_close; + driver->dev = &interface->dev; + driver->owner = THIS_MODULE; + + mutex_lock(&context->ctx_lock); + + lirc_minor = lirc_register_driver(driver); + if (lirc_minor < 0) { + err("%s: lirc_register_driver failed", __func__); + alloc_status = 7; + mutex_unlock(&context->ctx_lock); + } else + printk(KERN_INFO "%s: Registered Sasem driver (minor:%d)\n", + __func__, lirc_minor); + +alloc_status_switch: + + switch (alloc_status) { + + case 7: + if (vfd_ep_found) + usb_free_urb(tx_urb); + case 6: + usb_free_urb(rx_urb); + case 5: + lirc_buffer_free(rbuf); + case 4: + kfree(rbuf); + case 3: + kfree(driver); + case 2: + kfree(context); + context = NULL; + case 1: + retval = -ENOMEM; + goto exit; + } + + /* Needed while unregistering! */ + driver->minor = lirc_minor; + + context->dev = dev; + context->dev_present = 1; + context->rx_endpoint = rx_endpoint; + context->rx_urb = rx_urb; + if (vfd_ep_found) { + context->tx_endpoint = tx_endpoint; + context->tx_urb = tx_urb; + context->vfd_contrast = 1000; /* range 0 - 1000 */ + } + context->driver = driver; + + usb_set_intfdata(interface, context); + + if (vfd_ep_found) { + + if (debug) + printk(KERN_INFO "Registering VFD with sysfs\n"); + if (usb_register_dev(interface, &sasem_class)) + /* Not a fatal error, so ignore */ + printk(KERN_INFO "%s: could not get a minor number " + "for VFD\n", __func__); + } + + printk(KERN_INFO "%s: Sasem device on usb<%d:%d> initialized\n", + __func__, dev->bus->busnum, dev->devnum); + + mutex_unlock(&context->ctx_lock); +exit: + return retval; +} + +/** + * Callback function for USB core API: disonnect + */ +static void sasem_disconnect(struct usb_interface *interface) +{ + struct sasem_context *context; + + /* prevent races with ir_open()/vfd_open() */ + mutex_lock(&disconnect_lock); + + context = usb_get_intfdata(interface); + mutex_lock(&context->ctx_lock); + + printk(KERN_INFO "%s: Sasem device disconnected\n", __func__); + + usb_set_intfdata(interface, NULL); + context->dev_present = 0; + + /* Stop reception */ + usb_kill_urb(context->rx_urb); + + /* Abort ongoing write */ + if (atomic_read(&context->tx.busy)) { + + usb_kill_urb(context->tx_urb); + wait_for_completion(&context->tx.finished); + } + + /* De-register from lirc_dev if IR port is not open */ + if (!context->ir_isopen) + deregister_from_lirc(context); + + usb_deregister_dev(interface, &sasem_class); + + mutex_unlock(&context->ctx_lock); + + if (!context->ir_isopen && !context->vfd_isopen) + delete_context(context); + + mutex_unlock(&disconnect_lock); +} + +static int __init sasem_init(void) +{ + int rc; + + printk(KERN_INFO MOD_DESC ", v" MOD_VERSION "\n"); + printk(KERN_INFO MOD_AUTHOR "\n"); + + rc = usb_register(&sasem_driver); + if (rc < 0) { + err("%s: usb register failed (%d)", __func__, rc); + return -ENODEV; + } + return 0; +} + +static void __exit sasem_exit(void) +{ + usb_deregister(&sasem_driver); + printk(KERN_INFO "module removed. Goodbye!\n"); +} + + +module_init(sasem_init); +module_exit(sasem_exit); -- 1.7.1.1 -- Jarod Wilson jarod@xxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
