Nb: this is a very trimmed-down lirc_imon, which only supports the
oldest generation of imon devices that don't do onboard signal decoding
like the most recent generation imon devices -- those are now supported
by the ir-core imon driver.
Signed-off-by: Jarod Wilson <jarod@xxxxxxxxxx>
---
drivers/staging/lirc/lirc_imon.c | 1058 ++++++++++++++++++++++++++++++++++++++
1 files changed, 1058 insertions(+), 0 deletions(-)
create mode 100644 drivers/staging/lirc/lirc_imon.c
diff --git a/drivers/staging/lirc/lirc_imon.c b/drivers/staging/lirc/lirc_imon.c
new file mode 100644
index 0000000..43856d6
--- /dev/null
+++ b/drivers/staging/lirc/lirc_imon.c
@@ -0,0 +1,1058 @@
+/*
+ * lirc_imon.c: LIRC/VFD/LCD driver for SoundGraph iMON IR/VFD/LCD
+ * including the iMON PAD model
+ *
+ * Copyright(C) 2004 Venky Raju(dev@xxxxxxxx)
+ * Copyright(C) 2009 Jarod Wilson <jarod@xxxxxxxxxxxx>
+ *
+ * lirc_imon 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.
+ */
+
+#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 "Venky Raju <dev@xxxxxxxx>"
+#define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
+#define MOD_NAME "lirc_imon"
+#define MOD_VERSION "0.8"
+
+#define DISPLAY_MINOR_BASE 144
+#define DEVICE_NAME "lcd%d"
+
+#define BUF_CHUNK_SIZE 4
+#define BUF_SIZE 128
+
+#define BIT_DURATION 250 /* each bit received is 250us */
+
+/*** P R O T O T Y P E S ***/
+
+/* USB Callback prototypes */
+static int imon_probe(struct usb_interface *interface,
+ const struct usb_device_id *id);
+static void imon_disconnect(struct usb_interface *interface);
+static void usb_rx_callback(struct urb *urb);
+static void usb_tx_callback(struct urb *urb);
+
+/* suspend/resume support */
+static int imon_resume(struct usb_interface *intf);
+static int imon_suspend(struct usb_interface *intf, pm_message_t message);
+
+/* Display file_operations function prototypes */
+static int display_open(struct inode *inode, struct file *file);
+static int display_close(struct inode *inode, struct file *file);
+
+/* VFD write operation */
+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 imon_init(void);
+static void __exit imon_exit(void);
+
+/*** G L O B A L S ***/
+#define IMON_DATA_BUF_SZ 35
+
+struct imon_context {
+ struct usb_device *usbdev;
+ /* Newer devices have two interfaces */
+ int display; /* not all controllers do */
+ int display_isopen; /* display port has been opened */
+ int ir_isopen; /* IR port open */
+ int dev_present; /* USB device presence */
+ struct mutex ctx_lock; /* to lock this object */
+ wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
+
+ int vfd_proto_6p; /* some VFD require a 6th packet */
+
+ 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 rx_data {
+ int count; /* length of 0 or 1 sequence */
+ int prev_bit; /* logic level of sequence */
+ int initial_space; /* initial space flag */
+ } rx;
+
+ struct tx_t {
+ unsigned char data_buf[IMON_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;
+};
+
+static struct file_operations display_fops = {
+ .owner = THIS_MODULE,
+ .open = &display_open,
+ .write = &vfd_write,
+ .release = &display_close
+};
+
+/*
+ * USB Device ID for iMON USB Control Boards
+ *
+ * The Windows drivers contain 6 different inf files, more or less one for
+ * each new device until the 0x0034-0x0046 devices, which all use the same
+ * driver. Some of the devices in the 34-46 range haven't been definitively
+ * identified yet. Early devices have either a TriGem Computer, Inc. or a
+ * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
+ * devices use the SoundGraph vendor ID (0x15c2).
+ */
+static struct usb_device_id imon_usb_id_table[] = {
+ /* TriGem iMON (IR only) -- TG_iMON.inf */
+ { USB_DEVICE(0x0aa8, 0x8001) },
+
+ /* SoundGraph iMON (IR only) -- sg_imon.inf */
+ { USB_DEVICE(0x04e8, 0xff30) },
+
+ /* SoundGraph iMON VFD (IR & VFD) -- iMON_VFD.inf */
+ { USB_DEVICE(0x0aa8, 0xffda) },
+
+ /* SoundGraph iMON SS (IR & VFD) -- iMON_SS.inf */
+ { USB_DEVICE(0x15c2, 0xffda) },
+
+ {}
+};
+
+/* Some iMON VFD models requires a 6th packet for VFD writes */
+static struct usb_device_id vfd_proto_6p_list[] = {
+ { USB_DEVICE(0x15c2, 0xffda) },
+ {}
+};
+
+/* Some iMON devices have no lcd/vfd, don't set one up */
+static struct usb_device_id ir_only_list[] = {
+ { USB_DEVICE(0x0aa8, 0x8001) },
+ { USB_DEVICE(0x04e8, 0xff30) },
+ {}
+};
+
+/* USB Device data */
+static struct usb_driver imon_driver = {
+ .name = MOD_NAME,
+ .probe = imon_probe,
+ .disconnect = imon_disconnect,
+ .suspend = imon_suspend,
+ .resume = imon_resume,
+ .id_table = imon_usb_id_table,
+};
+
+static struct usb_class_driver imon_class = {
+ .name = DEVICE_NAME,
+ .fops = &display_fops,
+ .minor_base = DISPLAY_MINOR_BASE,
+};
+
+/* to prevent races between open() and disconnect(), probing, etc */
+static DEFINE_MUTEX(driver_lock);
+
+static int debug;
+
+/*** M O D U L E C O D E ***/
+
+MODULE_AUTHOR(MOD_AUTHOR);
+MODULE_DESCRIPTION(MOD_DESC);
+MODULE_VERSION(MOD_VERSION);
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
+module_param(debug, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes(default: no)");
+
+static void free_imon_context(struct imon_context *context)
+{
+ struct device *dev = context->driver->dev;
+ usb_free_urb(context->tx_urb);
+ usb_free_urb(context->rx_urb);
+ lirc_buffer_free(context->driver->rbuf);
+ kfree(context->driver->rbuf);
+ kfree(context->driver);
+ kfree(context);
+
+ dev_dbg(dev, "%s: iMON context freed\n", __func__);
+}
+
+static void deregister_from_lirc(struct imon_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 MOD_NAME ": Deregistered iMON driver "
+ "(minor:%d)\n", minor);
+
+}
+
+/**
+ * Called when the Display device (e.g. /dev/lcd0)
+ * is opened by the application.
+ */
+static int display_open(struct inode *inode, struct file *file)
+{
+ struct usb_interface *interface;
+ struct imon_context *context = NULL;
+ int subminor;
+ int retval = 0;
+
+ /* prevent races with disconnect */
+ mutex_lock(&driver_lock);
+
+ subminor = iminor(inode);
+ interface = usb_find_interface(&imon_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->display) {
+ err("%s: display not supported by device", __func__);
+ retval = -ENODEV;
+ } else if (context->display_isopen) {
+ err("%s: display port is already open", __func__);
+ retval = -EBUSY;
+ } else {
+ context->display_isopen = 1;
+ file->private_data = context;
+ dev_info(context->driver->dev, "display port opened\n");
+ }
+
+ mutex_unlock(&context->ctx_lock);
+
+exit:
+ mutex_unlock(&driver_lock);
+ return retval;
+}
+
+/**
+ * Called when the display device (e.g. /dev/lcd0)
+ * is closed by the application.
+ */
+static int display_close(struct inode *inode, struct file *file)
+{
+ struct imon_context *context = NULL;
+ int retval = 0;
+
+ context = (struct imon_context *)file->private_data;
+
+ if (!context) {
+ err("%s: no context for device", __func__);
+ return -ENODEV;
+ }
+
+ mutex_lock(&context->ctx_lock);
+
+ if (!context->display) {
+ err("%s: display not supported by device", __func__);
+ retval = -ENODEV;
+ } else if (!context->display_isopen) {
+ err("%s: display is not open", __func__);
+ retval = -EIO;
+ } else {
+ context->display_isopen = 0;
+ dev_info(context->driver->dev, "display 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);
+ free_imon_context(context);
+ return retval;
+ }
+ }
+
+ mutex_unlock(&context->ctx_lock);
+ return retval;
+}
+
+/**
+ * Sends a packet to the device -- this function must be called
+ * with context->ctx_lock held.
+ */
+static int send_packet(struct imon_context *context)
+{
+ unsigned int pipe;
+ int interval = 0;
+ int retval = 0;
+ struct usb_ctrlrequest *control_req = NULL;
+
+ /* Check if we need to use control or interrupt urb */
+ pipe = usb_sndintpipe(context->usbdev,
+ context->tx_endpoint->bEndpointAddress);
+ interval = context->tx_endpoint->bInterval;
+
+ usb_fill_int_urb(context->tx_urb, context->usbdev, 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);
+ retval = wait_for_completion_interruptible(
+ &context->tx.finished);
+ if (retval)
+ err("%s: task interrupted", __func__);
+ mutex_lock(&context->ctx_lock);
+
+ retval = context->tx.status;
+ if (retval)
+ err("%s: packet tx failed (%d)", __func__, retval);
+ }
+
+ kfree(control_req);
+
+ return retval;
+}
+
+/**
+ * Writes data to the VFD. The iMON VFD is 2x16 characters
+ * and requires data in 5 consecutive USB interrupt packets,
+ * each packet but the last carrying 7 bytes.
+ *
+ * I don't know if the VFD board supports features such as
+ * scrolling, clearing rows, blanking, etc. so at
+ * the caller must provide a full screen of data. If fewer
+ * than 32 bytes are provided spaces will be appended to
+ * generate a full screen.
+ */
+static ssize_t vfd_write(struct file *file, const char *buf,
+ size_t n_bytes, loff_t *pos)
+{
+ int i;
+ int offset;
+ int seq;
+ int retval = 0;
+ struct imon_context *context;
+ const unsigned char vfd_packet6[] = {
+ 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
+ int *data_buf;
+
+ context = (struct imon_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 iMON device present", __func__);
+ retval = -ENODEV;
+ goto exit;
+ }
+
+ if (n_bytes <= 0 || n_bytes > IMON_DATA_BUF_SZ - 3) {
+ err("%s: invalid payload size", __func__);
+ retval = -EINVAL;
+ goto exit;
+ }
+
+ data_buf = memdup_user(buf, n_bytes);
+ if (IS_ERR(data_buf)) {
+ retval = PTR_ERR(data_buf);
+ goto exit;
+ }
+
+ memcpy(context->tx.data_buf, data_buf, n_bytes);
+
+ /* Pad with spaces */
+ for (i = n_bytes; i < IMON_DATA_BUF_SZ - 3; ++i)
+ context->tx.data_buf[i] = ' ';
+
+ for (i = IMON_DATA_BUF_SZ - 3; i < IMON_DATA_BUF_SZ; ++i)
+ context->tx.data_buf[i] = 0xFF;
+
+ offset = 0;
+ seq = 0;
+
+ do {
+ memcpy(context->usb_tx_buf, context->tx.data_buf + offset, 7);
+ context->usb_tx_buf[7] = (unsigned char) seq;
+
+ retval = send_packet(context);
+ if (retval) {
+ err("%s: send packet failed for packet #%d",
+ __func__, seq/2);
+ goto exit;
+ } else {
+ seq += 2;
+ offset += 7;
+ }
+
+ } while (offset < IMON_DATA_BUF_SZ);
+
+ if (context->vfd_proto_6p) {
+ /* Send packet #6 */
+ memcpy(context->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
+ context->usb_tx_buf[7] = (unsigned char) seq;
+ retval = send_packet(context);
+ if (retval)
+ err("%s: send packet failed for packet #%d",
+ __func__, seq/2);
+ }
+
+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 imon_context *context;
+
+ if (!urb)
+ return;
+ context = (struct imon_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 imon_context *context;
+
+ /* prevent races with disconnect */
+ mutex_lock(&driver_lock);
+
+ context = (struct imon_context *)data;
+
+ /* initial IR protocol decode variables */
+ context->rx.count = 0;
+ context->rx.initial_space = 1;
+ context->rx.prev_bit = 0;
+
+ context->ir_isopen = 1;
+ dev_info(context->driver->dev, "IR port opened\n");
+
+ mutex_unlock(&driver_lock);
+ return retval;
+}
+
+/**
+ * Called by lirc_dev when the application closes /dev/lirc
+ */
+static void ir_close(void *data)
+{
+ struct imon_context *context;
+
+ context = (struct imon_context *)data;
+ if (!context) {
+ err("%s: no context for device", __func__);
+ return;
+ }
+
+ mutex_lock(&context->ctx_lock);
+
+ context->ir_isopen = 0;
+ dev_info(context->driver->dev, "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->display_isopen) {
+ mutex_unlock(&context->ctx_lock);
+ free_imon_context(context);
+ return;
+ }
+ /*
+ * If display port is open, context will be deleted by
+ * display_close
+ */
+ }
+
+ mutex_unlock(&context->ctx_lock);
+ return;
+}
+
+/**
+ * Convert bit count to time duration (in us) and submit
+ * the value to lirc_dev.
+ */
+static void submit_data(struct imon_context *context)
+{
+ unsigned char buf[4];
+ int value = context->rx.count;
+ int i;
+
+ dev_dbg(context->driver->dev, "submitting data to LIRC\n");
+
+ value *= BIT_DURATION;
+ value &= PULSE_MASK;
+ if (context->rx.prev_bit)
+ value |= PULSE_BIT;
+
+ for (i = 0; i < 4; ++i)
+ buf[i] = value>>(i*8);
+
+ lirc_buffer_write(context->driver->rbuf, buf);
+ wake_up(&context->driver->rbuf->wait_poll);
+ return;
+}
+
+static inline int tv2int(const struct timeval *a, const struct timeval *b)
+{
+ int usecs = 0;
+ int sec = 0;
+
+ if (b->tv_usec > a->tv_usec) {
+ usecs = 1000000;
+ sec--;
+ }
+
+ usecs += a->tv_usec - b->tv_usec;
+
+ sec += a->tv_sec - b->tv_sec;
+ sec *= 1000;
+ usecs /= 1000;
+ sec += usecs;
+
+ if (sec < 0)
+ sec = 1000;
+
+ return sec;
+}
+
+/**
+ * Process the incoming packet
+ */
+static void imon_incoming_packet(struct imon_context *context,
+ struct urb *urb, int intf)
+{
+ int len = urb->actual_length;
+ unsigned char *buf = urb->transfer_buffer;
+ struct device *dev = context->driver->dev;
+ int octet, bit;
+ unsigned char mask;
+ int i, chunk_num;
+
+ /*
+ * just bail out if no listening IR client
+ */
+ if (!context->ir_isopen)
+ return;
+
+ if (len != 8) {
+ dev_warn(dev, "imon %s: invalid incoming packet "
+ "size (len = %d, intf%d)\n", __func__, len, intf);
+ return;
+ }
+
+ if (debug) {
+ printk(KERN_INFO "raw packet: ");
+ for (i = 0; i < len; ++i)
+ printk("%02x ", buf[i]);
+ printk("\n");
+ }
+
+ /*
+ * Translate received data to pulse and space lengths.
+ * Received data is active low, i.e. pulses are 0 and
+ * spaces are 1.
+ *
+ * My original algorithm was essentially similar to
+ * Changwoo Ryu's with the exception that he switched
+ * the incoming bits to active high and also fed an
+ * initial space to LIRC at the start of a new sequence
+ * if the previous bit was a pulse.
+ *
+ * I've decided to adopt his algorithm.
+ */
+
+ if (buf[7] == 1 && context->rx.initial_space) {
+ /* LIRC requires a leading space */
+ context->rx.prev_bit = 0;
+ context->rx.count = 4;
+ submit_data(context);
+ context->rx.count = 0;
+ }
+
+ for (octet = 0; octet < 5; ++octet) {
+ mask = 0x80;
+ for (bit = 0; bit < 8; ++bit) {
+ int curr_bit = !(buf[octet] & mask);
+ if (curr_bit != context->rx.prev_bit) {
+ if (context->rx.count) {
+ submit_data(context);
+ context->rx.count = 0;
+ }
+ context->rx.prev_bit = curr_bit;
+ }
+ ++context->rx.count;
+ mask >>= 1;
+ }
+ }
+
+ if (chunk_num == 10) {
+ if (context->rx.count) {
+ submit_data(context);
+ context->rx.count = 0;
+ }
+ context->rx.initial_space = context->rx.prev_bit;
+ }
+}
+
+/**
+ * Callback function for USB core API: receive data
+ */
+static void usb_rx_callback(struct urb *urb)
+{
+ struct imon_context *context;
+ unsigned char *buf;
+ int len;
+ int intfnum = 0;
+
+ if (!urb)
+ return;
+
+ context = (struct imon_context *)urb->context;
+ if (!context)
+ return;
+
+ buf = urb->transfer_buffer;
+ len = urb->actual_length;
+
+ switch (urb->status) {
+ case -ENOENT: /* usbcore unlink successful! */
+ return;
+
+ case 0:
+ imon_incoming_packet(context, urb, intfnum);
+ break;
+
+ default:
+ dev_warn(context->driver->dev, "imon %s: status(%d): ignored\n",
+ __func__, urb->status);
+ break;
+ }
+
+ usb_submit_urb(context->rx_urb, GFP_ATOMIC);
+
+ return;
+}
+
+/**
+ * Callback function for USB core API: Probe
+ */
+static int imon_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
+{
+ struct usb_device *usbdev = 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;
+ struct device *dev = &interface->dev;
+ int ifnum;
+ int lirc_minor = 0;
+ int num_endpts;
+ int retval = 0;
+ int display_ep_found = 0;
+ int ir_ep_found = 0;
+ int alloc_status = 0;
+ int vfd_proto_6p = 0;
+ int code_length;
+ struct imon_context *context = NULL;
+ int i;
+ u16 vendor, product;
+
+ context = kzalloc(sizeof(struct imon_context), GFP_KERNEL);
+ if (!context) {
+ err("%s: kzalloc failed for context", __func__);
+ alloc_status = 1;
+ goto alloc_status_switch;
+ }
+
+ /*
+ * Try to auto-detect the type of display if the user hasn't set
+ * it by hand via the display_type modparam. Default is VFD.
+ */
+ if (usb_match_id(interface, ir_only_list))
+ context->display = 0;
+ else
+ context->display = 1;
+
+ code_length = BUF_CHUNK_SIZE * 8;
+
+ usbdev = usb_get_dev(interface_to_usbdev(interface));
+ iface_desc = interface->cur_altsetting;
+ num_endpts = iface_desc->desc.bNumEndpoints;
+ ifnum = iface_desc->desc.bInterfaceNumber;
+ vendor = le16_to_cpu(usbdev->descriptor.idVendor);
+ product = le16_to_cpu(usbdev->descriptor.idProduct);
+
+ dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
+ __func__, vendor, product, ifnum);
+
+ /* prevent races probing devices w/multiple interfaces */
+ mutex_lock(&driver_lock);
+
+ /*
+ * Scan the endpoint list and set:
+ * first input endpoint = IR endpoint
+ * first output endpoint = display endpoint
+ */
+ for (i = 0; i < num_endpts && !(ir_ep_found && display_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;
+ dev_dbg(dev, "%s: found IR endpoint\n", __func__);
+
+ } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
+ ep_type == USB_ENDPOINT_XFER_INT) {
+ tx_endpoint = ep;
+ display_ep_found = 1;
+ dev_dbg(dev, "%s: found display endpoint\n", __func__);
+ }
+ }
+
+ /*
+ * Some iMON receivers have no display. Unfortunately, it seems
+ * that SoundGraph recycles device IDs between devices both with
+ * and without... :\
+ */
+ if (context->display == 0) {
+ display_ep_found = 0;
+ dev_dbg(dev, "%s: device has no display\n", __func__);
+ }
+
+ /* Input endpoint is mandatory */
+ if (!ir_ep_found) {
+ err("%s: no valid input (IR) endpoint found.", __func__);
+ retval = -ENODEV;
+ alloc_status = 2;
+ goto alloc_status_switch;
+ }
+
+ /* Determine if display requires 6 packets */
+ if (display_ep_found) {
+ if (usb_match_id(interface, vfd_proto_6p_list))
+ vfd_proto_6p = 1;
+
+ dev_dbg(dev, "%s: vfd_proto_6p: %d\n",
+ __func__, vfd_proto_6p);
+ }
+
+ 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;
+ }
+ tx_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!tx_urb) {
+ err("%s: usb_alloc_urb failed for display urb",
+ __func__);
+ alloc_status = 6;
+ goto alloc_status_switch;
+ }
+
+ mutex_init(&context->ctx_lock);
+ context->vfd_proto_6p = vfd_proto_6p;
+
+ strcpy(driver->name, MOD_NAME);
+ driver->minor = -1;
+ driver->code_length = sizeof(int) * 8;
+ driver->sample_rate = 0;
+ driver->features = LIRC_CAN_REC_MODE2;
+ 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);
+
+ context->driver = driver;
+ /* start out in keyboard mode */
+
+ lirc_minor = lirc_register_driver(driver);
+ if (lirc_minor < 0) {
+ err("%s: lirc_register_driver failed", __func__);
+ alloc_status = 7;
+ goto alloc_status_switch;
+ } else
+ dev_info(dev, "Registered iMON driver "
+ "(lirc minor: %d)\n", lirc_minor);
+
+ /* Needed while unregistering! */
+ driver->minor = lirc_minor;
+
+ context->usbdev = usbdev;
+ context->dev_present = 1;
+ context->rx_endpoint = rx_endpoint;
+ context->rx_urb = rx_urb;
+
+ /*
+ * tx is used to send characters to lcd/vfd, associate RF
+ * remotes, set IR protocol, and maybe more...
+ */
+ context->tx_endpoint = tx_endpoint;
+ context->tx_urb = tx_urb;
+
+ if (display_ep_found)
+ context->display = 1;
+
+ usb_fill_int_urb(context->rx_urb, context->usbdev,
+ usb_rcvintpipe(context->usbdev,
+ 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 intf0 (%d)",
+ __func__, retval);
+ mutex_unlock(&context->ctx_lock);
+ goto exit;
+ }
+
+ usb_set_intfdata(interface, context);
+
+ if (context->display && ifnum == 0) {
+ dev_dbg(dev, "%s: Registering iMON display with sysfs\n",
+ __func__);
+
+ if (usb_register_dev(interface, &imon_class)) {
+ /* Not a fatal error, so ignore */
+ dev_info(dev, "%s: could not get a minor number for "
+ "display\n", __func__);
+ }
+ }
+
+ dev_info(dev, "iMON device (%04x:%04x, intf%d) on "
+ "usb<%d:%d> initialized\n", vendor, product, ifnum,
+ usbdev->bus->busnum, usbdev->devnum);
+
+alloc_status_switch:
+ mutex_unlock(&context->ctx_lock);
+
+ switch (alloc_status) {
+ case 7:
+ usb_free_urb(tx_urb);
+ case 6:
+ usb_free_urb(rx_urb);
+ case 5:
+ if (rbuf)
+ lirc_buffer_free(rbuf);
+ case 4:
+ kfree(rbuf);
+ case 3:
+ kfree(driver);
+ case 2:
+ kfree(context);
+ context = NULL;
+ case 1:
+ if (retval != -ENODEV)
+ retval = -ENOMEM;
+ break;
+ case 0:
+ retval = 0;
+ }
+
+exit:
+ mutex_unlock(&driver_lock);
+
+ return retval;
+}
+
+/**
+ * Callback function for USB core API: disconnect
+ */
+static void imon_disconnect(struct usb_interface *interface)
+{
+ struct imon_context *context;
+ int ifnum;
+
+ /* prevent races with ir_open()/display_open() */
+ mutex_lock(&driver_lock);
+
+ context = usb_get_intfdata(interface);
+ ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
+
+ mutex_lock(&context->ctx_lock);
+
+ usb_set_intfdata(interface, NULL);
+
+ /* Abort ongoing write */
+ if (atomic_read(&context->tx.busy)) {
+ usb_kill_urb(context->tx_urb);
+ complete_all(&context->tx.finished);
+ }
+
+ context->dev_present = 0;
+ usb_kill_urb(context->rx_urb);
+ if (context->display)
+ usb_deregister_dev(interface, &imon_class);
+
+ if (!context->ir_isopen && !context->dev_present) {
+ deregister_from_lirc(context);
+ mutex_unlock(&context->ctx_lock);
+ if (!context->display_isopen)
+ free_imon_context(context);
+ } else
+ mutex_unlock(&context->ctx_lock);
+
+ mutex_unlock(&driver_lock);
+
+ printk(KERN_INFO "%s: iMON device (intf%d) disconnected\n",
+ __func__, ifnum);
+}
+
+static int imon_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct imon_context *context = usb_get_intfdata(intf);
+
+ usb_kill_urb(context->rx_urb);
+
+ return 0;
+}
+
+static int imon_resume(struct usb_interface *intf)
+{
+ int rc = 0;
+ struct imon_context *context = usb_get_intfdata(intf);
+
+ usb_fill_int_urb(context->rx_urb, context->usbdev,
+ usb_rcvintpipe(context->usbdev,
+ context->rx_endpoint->bEndpointAddress),
+ context->usb_rx_buf, sizeof(context->usb_rx_buf),
+ usb_rx_callback, context,
+ context->rx_endpoint->bInterval);
+
+ rc = usb_submit_urb(context->rx_urb, GFP_ATOMIC);
+
+ return rc;
+}
+
+static int __init imon_init(void)
+{
+ int rc;
+
+ printk(KERN_INFO MOD_NAME ": " MOD_DESC ", v" MOD_VERSION "\n");
+
+ rc = usb_register(&imon_driver);
+ if (rc) {
+ err("%s: usb register failed(%d)", __func__, rc);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static void __exit imon_exit(void)
+{
+ usb_deregister(&imon_driver);
+ printk(KERN_INFO MOD_NAME ": module removed. Goodbye!\n");
+}
+
+module_init(imon_init);
+module_exit(imon_exit);
--
1.7.1.1
--
Jarod Wilson
jarod@xxxxxxxxxx
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