| /* |
| * 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/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" |
| * |
| * |
| * 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@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 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 const struct file_operations vfd_fops = { |
| .owner = THIS_MODULE, |
| .open = &vfd_open, |
| .write = &vfd_write, |
| .unlocked_ioctl = &vfd_ioctl, |
| .release = &vfd_close, |
| .llseek = noop_llseek, |
| }; |
| |
| /* 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 = NULL; |
| |
| 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 (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 < 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); |
| kfree(data_buf); |
| |
| 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 retval; |
| } |
| |
| /** |
| * 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; |
| int i; |
| |
| if (len != 8) { |
| printk(KERN_WARNING "%s: invalid incoming packet size (%d)\n", |
| __func__, len); |
| return; |
| } |
| |
| if (debug) { |
| printk(KERN_INFO "Incoming data: "); |
| for (i = 0; i < 8; ++i) |
| printk(KERN_CONT "%02x ", buf[i]); |
| printk(KERN_CONT "\n"); |
| } |
| |
| /* |
| * 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; |
| retval = lirc_minor; |
| goto unlock; |
| } else |
| printk(KERN_INFO "%s: Registered Sasem driver (minor:%d)\n", |
| __func__, lirc_minor); |
| |
| /* 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); |
| unlock: |
| mutex_unlock(&context->ctx_lock); |
| |
| 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: |
| if (retval == 0) |
| retval = -ENOMEM; |
| } |
| |
| 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); |