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Subject[PATCH 12/18] lirc driver for the Sasem OnAir and Dign HV5 receivers
Date
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Janne Grunau <j@jannau.net>
CC: Christoph Bartelmus <lirc@bartelmus.de>
---
drivers/input/lirc/Kconfig | 7 +
drivers/input/lirc/Makefile | 1 +
drivers/input/lirc/lirc_sasem.c | 969 +++++++++++++++++++++++++++++++++++++++
3 files changed, 977 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/lirc/lirc_sasem.c

diff --git a/drivers/input/lirc/Kconfig b/drivers/input/lirc/Kconfig
index 7e924fe..2731c40 100644
--- a/drivers/input/lirc/Kconfig
+++ b/drivers/input/lirc/Kconfig
@@ -68,6 +68,13 @@ config LIRC_MCEUSB2
help
Driver for the Microsoft Media Center Ed. Receiver, v2

+config LIRC_SASEM
+ tristate "Sasem USB IR Remote"
+ default n
+ depends on LIRC_DEV
+ help
+ Driver for the Sasem OnAir Remocon-V or Dign HV5 HTPC IR/VFD Module
+
config LIRC_SERIAL
tristate "Homebrew Serial Port Receiver"
default n
diff --git a/drivers/input/lirc/Makefile b/drivers/input/lirc/Makefile
index 2ee00d1..1b2793d 100644
--- a/drivers/input/lirc/Makefile
+++ b/drivers/input/lirc/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_LIRC_IGORPLUGUSB) += lirc_igorplugusb.o
obj-$(CONFIG_LIRC_IMON) += lirc_imon.o
obj-$(CONFIG_LIRC_MCEUSB) += lirc_mceusb.o
obj-$(CONFIG_LIRC_MCEUSB2) += lirc_mceusb2.o
+obj-$(CONFIG_LIRC_SASEM) += lirc_sasem.o
obj-$(CONFIG_LIRC_SERIAL) += lirc_serial.o
obj-$(CONFIG_LIRC_STREAMZAP) += lirc_streamzap.o
obj-$(CONFIG_LIRC_TTUSBIR) += lirc_ttusbir.o
diff --git a/drivers/input/lirc/lirc_sasem.c b/drivers/input/lirc/lirc_sasem.c
new file mode 100644
index 0000000..003f492
--- /dev/null
+++ b/drivers/input/lirc/lirc_sasem.c
@@ -0,0 +1,969 @@
+/* lirc_sasem.c - USB remote support for LIRC
+ * Version 0.5
+ *
+ * Copyright (C) 2004-2005 Oliver Stabel <oliver.stabel@gmx.de>
+ * Tim Davies <tim@opensystems.net.au>
+ *
+ * This driver was derived from:
+ * Venky Raju <dev@venky.ws>
+ * "lirc_imon - "LIRC plugin/VFD driver for Ahanix/Soundgraph IMON IR/VFD"
+ * Paul Miller <pmiller9@users.sourceforge.net>'s 2003-2004
+ * "lirc_atiusb - USB remote support for LIRC"
+ * Culver Consulting Services <henry@culcon.com>'s 2003
+ * "Sasem OnAir VFD/IR USB driver"
+ *
+ *
+ * 2004/06/13 - 0.1
+ * initial version
+ *
+ * 2004/06/28 - 0.2
+ * added file system support to write data to VFD device (used
+ * in conjunction with LCDProc)
+ *
+ * 2004/11/22 - 0.3
+ * Ported to 2.6 kernel
+ * - Tim Davies <tim@opensystems.net.au>
+ *
+ * 2005/03/29 - 0.4
+ * A few tidyups and keypress timings
+ * - Tim Davies <tim@opensystems.net.au>
+ *
+ * 2005/06/23 - 0.5
+ * A complete rewrite (shamelessly) based on lirc_imon.c
+ * Tim Davies <tim@opensystems.net.au>
+ *
+ * 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/version.h>
+
+
+#include <linux/autoconf.h>
+
+#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 "lirc.h"
+#include "lirc_dev.h"
+
+
+#define MOD_AUTHOR "Oliver Stabel <oliver.stabel@gmx.de>, " \
+ "Tim Davies <tim@opensystems.net.au>"
+#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 SUCCESS 0
+#define TRUE 1
+#define FALSE 0
+
+#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 int vfd_ioctl(struct inode *inode, 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 plugin 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
+ * ------------------------------------------------------------
+ */
+
+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 lock; /* to lock this object */
+ wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
+
+ struct lirc_plugin *plugin;
+ 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[32]; /* 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;
+};
+
+#define LOCK_CONTEXT mutex_lock(&context->lock)
+#define UNLOCK_CONTEXT mutex_unlock(&context->lock)
+
+/* VFD file operations */
+static struct file_operations vfd_fops = {
+
+ .owner = THIS_MODULE,
+ .open = &vfd_open,
+ .write = &vfd_write,
+ .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) },
+ /* Terminiating 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 DECLARE_MUTEX(disconnect_sem);
+
+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, 0);
+MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)");
+
+static inline 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->plugin->rbuf);
+ kfree(context->plugin->rbuf);
+ kfree(context->plugin);
+ kfree(context);
+
+ if (debug)
+ info("%s: context deleted", __func__);
+}
+
+static inline void deregister_from_lirc(struct sasem_context *context)
+{
+ int retval;
+ int minor = context->plugin->minor;
+
+ retval = lirc_unregister_plugin(minor);
+ if (retval)
+ err("%s: unable to deregister from lirc (%d)",
+ __func__, retval);
+ else
+ info("Deregistered Sasem plugin (minor:%d)", 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 = SUCCESS;
+
+ /* prevent races with disconnect */
+ down(&disconnect_sem);
+
+ 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;
+ }
+
+ LOCK_CONTEXT;
+
+ if (context->vfd_isopen) {
+ err("%s: VFD port is already open", __func__);
+ retval = -EBUSY;
+ } else {
+ context->vfd_isopen = TRUE;
+ file->private_data = context;
+ info("VFD port opened");
+ }
+
+ UNLOCK_CONTEXT;
+
+exit:
+ up(&disconnect_sem);
+ return retval;
+}
+
+/**
+ * Called when the VFD device (e.g. /dev/usb/lcd)
+ * is closed by the application.
+ */
+static int vfd_ioctl(struct inode *inode, 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;
+ }
+
+ LOCK_CONTEXT;
+
+ switch (cmd) {
+ case IOCTL_LCD_CONTRAST:
+ if (arg > 1000)
+ arg = 1000;
+ if (arg < 0)
+ arg = 0;
+ context->vfd_contrast = (unsigned int)arg;
+ break;
+ default:
+ info("Unknown IOCTL command");
+ UNLOCK_CONTEXT;
+ return -ENOIOCTLCMD; /* not supported */
+ }
+
+ UNLOCK_CONTEXT;
+ 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 = SUCCESS;
+
+ context = (struct sasem_context *) file->private_data;
+
+ if (!context) {
+ err("%s: no context for device", __func__);
+ return -ENODEV;
+ }
+
+ LOCK_CONTEXT;
+
+ if (!context->vfd_isopen) {
+ err("%s: VFD is not open", __func__);
+ retval = -EIO;
+ } else {
+ context->vfd_isopen = FALSE;
+ info("VFD port closed");
+ 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. */
+ UNLOCK_CONTEXT;
+ delete_context(context);
+ return retval;
+ }
+ }
+
+ UNLOCK_CONTEXT;
+ return retval;
+}
+
+/**
+ * Sends a packet to the VFD.
+ */
+static inline int send_packet(struct sasem_context *context)
+{
+ unsigned int pipe;
+ int interval = 0;
+ int retval = SUCCESS;
+
+ 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 != SUCCESS) {
+ atomic_set(&(context->tx.busy), 0);
+ err("%s: error submitting urb (%d)", __func__, retval);
+ } else {
+ /* Wait for tranmission to complete (or abort) */
+ UNLOCK_CONTEXT;
+ wait_for_completion(&context->tx.finished);
+ LOCK_CONTEXT;
+
+ retval = context->tx.status;
+ if (retval != SUCCESS)
+ 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 = SUCCESS;
+ struct sasem_context *context;
+
+ context = (struct sasem_context *) file->private_data;
+ if (!context) {
+ err("%s: no context for device", __func__);
+ return -ENODEV;
+ }
+
+ LOCK_CONTEXT;
+
+ if (!context->dev_present) {
+ err("%s: no Sasem device present", __func__);
+ retval = -ENODEV;
+ goto exit;
+ }
+
+ if (n_bytes <= 0 || n_bytes > 32) {
+ err("%s: invalid payload size", __func__);
+ retval = -EINVAL;
+ goto exit;
+ }
+
+ retval = copy_from_user(context->tx.data_buf, buf, n_bytes);
+ if (retval < 0)
+ goto exit;
+
+ /* Pad with spaces */
+ for (i = n_bytes; i < 32; ++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 != SUCCESS) {
+
+ err("%s: send packet failed for packet #%d",
+ __func__, i);
+ goto exit;
+ }
+ }
+exit:
+
+ UNLOCK_CONTEXT;
+
+ return (retval == SUCCESS) ? 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 = SUCCESS;
+ struct sasem_context *context;
+
+ /* prevent races with disconnect */
+ down(&disconnect_sem);
+
+ context = (struct sasem_context *) data;
+
+ LOCK_CONTEXT;
+
+ 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 = TRUE;
+ info("IR port opened");
+ }
+
+exit:
+ UNLOCK_CONTEXT;
+
+ up(&disconnect_sem);
+ return SUCCESS;
+}
+
+/**
+ * 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;
+ }
+
+ LOCK_CONTEXT;
+
+ usb_kill_urb(context->rx_urb);
+ context->ir_isopen = FALSE;
+ info("IR port closed");
+
+ if (!context->dev_present) {
+
+ /*
+ * Device disconnected while IR port was
+ * still open. Plugin was not deregistered
+ * at disconnect time, so do it now.
+ */
+ deregister_from_lirc(context);
+
+ if (!context->vfd_isopen) {
+
+ UNLOCK_CONTEXT;
+ delete_context(context);
+ return;
+ }
+ /* If VFD port is open, context will be deleted by vfd_close */
+ }
+
+ UNLOCK_CONTEXT;
+ return;
+}
+
+/**
+ * Process the incoming packet
+ */
+static inline 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) {
+ warn("%s: invalid incoming packet size (%d)",
+ __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_1(context->plugin->rbuf, buf);
+ wake_up(&context->plugin->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 SUCCESS:
+ if (context->ir_isopen)
+ incoming_packet(context, urb);
+ break;
+
+ default:
+ warn("%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_plugin *plugin = NULL;
+ struct lirc_buffer *rbuf = NULL;
+ int lirc_minor = 0;
+ int num_endpoints;
+ int retval = SUCCESS;
+ int vfd_ep_found;
+ int ir_ep_found;
+ int alloc_status;
+ struct sasem_context *context = NULL;
+ int i;
+
+ info("%s: found Sasem device", __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 = FALSE;
+ vfd_ep_found = FALSE;
+
+ 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 = TRUE;
+ if (debug)
+ info("%s: found IR endpoint", __func__);
+
+ } else if (!vfd_ep_found &&
+ ep_dir == USB_DIR_OUT &&
+ ep_type == USB_ENDPOINT_XFER_INT) {
+
+ tx_endpoint = ep;
+ vfd_ep_found = TRUE;
+ if (debug)
+ info("%s: found VFD endpoint", __func__);
+ }
+ }
+
+ /* Input endpoint is mandatory */
+ if (!ir_ep_found) {
+
+ err("%s: no valid input (IR) endpoint found.", __func__);
+ retval = -ENODEV;
+ goto exit;
+ }
+
+ /* Warning if no VFD endpoint */
+ if (!vfd_ep_found)
+ info("%s: no valid output (VFD) endpoint found.", __func__);
+
+
+ /* Allocate memory */
+ alloc_status = SUCCESS;
+
+ context = kmalloc(sizeof(struct sasem_context), GFP_KERNEL);
+ if (!context) {
+ err("%s: kmalloc failed for context", __func__);
+ alloc_status = 1;
+ goto alloc_status_switch;
+ }
+ plugin = kmalloc(sizeof(struct lirc_plugin), GFP_KERNEL);
+ if (!plugin) {
+ err("%s: kmalloc failed for lirc_plugin", __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;
+ }
+ }
+
+ /* clear all members of sasem_context and lirc_plugin */
+ memset(context, 0, sizeof(struct sasem_context));
+ mutex_init(&context->lock);
+
+ memset(plugin, 0, sizeof(struct lirc_plugin));
+
+ strcpy(plugin->name, MOD_NAME);
+ plugin->minor = -1;
+ plugin->code_length = 64;
+ plugin->sample_rate = 0;
+ plugin->features = LIRC_CAN_REC_LIRCCODE;
+ plugin->data = context;
+ plugin->rbuf = rbuf;
+ plugin->set_use_inc = ir_open;
+ plugin->set_use_dec = ir_close;
+ plugin->dev = &dev->dev;
+ plugin->owner = THIS_MODULE;
+
+ LOCK_CONTEXT;
+
+ lirc_minor = lirc_register_plugin(plugin);
+ if (lirc_minor < 0) {
+ err("%s: lirc_register_plugin failed", __func__);
+ alloc_status = 7;
+ UNLOCK_CONTEXT;
+ } else
+ info("%s: Registered Sasem plugin (minor:%d)",
+ __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(plugin);
+ case 2:
+ kfree(context);
+ context = NULL;
+ case 1:
+ retval = -ENOMEM;
+ goto exit;
+ }
+
+ /* Needed while unregistering! */
+ plugin->minor = lirc_minor;
+
+ context->dev = dev;
+ context->dev_present = TRUE;
+ 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->plugin = plugin;
+
+ usb_set_intfdata(interface, context);
+
+ if (vfd_ep_found) {
+
+ if (debug)
+ info("Registering VFD with sysfs");
+ if (usb_register_dev(interface, &sasem_class))
+ /* Not a fatal error, so ignore */
+ info("%s: could not get a minor number for VFD",
+ __func__);
+ }
+
+ info("%s: Sasem device on usb<%d:%d> initialized",
+ __func__, dev->bus->busnum, dev->devnum);
+
+ UNLOCK_CONTEXT;
+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() */
+ down(&disconnect_sem);
+
+ context = usb_get_intfdata(interface);
+ LOCK_CONTEXT;
+
+ info("%s: Sasem device disconnected", __func__);
+
+ usb_set_intfdata(interface, NULL);
+ context->dev_present = FALSE;
+
+ /* 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);
+
+ UNLOCK_CONTEXT;
+
+ if (!context->ir_isopen && !context->vfd_isopen)
+ delete_context(context);
+
+ up(&disconnect_sem);
+}
+
+#ifdef MODULE
+static int __init sasem_init(void)
+{
+ int rc;
+
+ info(MOD_DESC ", v" MOD_VERSION);
+ info(MOD_AUTHOR);
+
+ rc = usb_register(&sasem_driver);
+ if (rc < 0) {
+ err("%s: usb register failed (%d)", __func__, rc);
+ return -ENODEV;
+ }
+ return SUCCESS;
+}
+
+static void __exit sasem_exit(void)
+{
+ usb_deregister(&sasem_driver);
+ info("module removed. Goodbye!");
+}
+
+
+module_init(sasem_init);
+module_exit(sasem_exit);
+
+#endif /* MODULE */
--
1.6.0.1


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