| /* |
| * lirc_imon.c: LIRC/VFD/LCD driver for SoundGraph iMON IR/VFD/LCD |
| * including the iMON PAD model |
| * |
| * Copyright(C) 2004 Venky Raju(dev@venky.ws) |
| * Copyright(C) 2009 Jarod Wilson <jarod@wilsonet.com> |
| * |
| * 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@venky.ws>" |
| #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 const struct file_operations display_fops = { |
| .owner = THIS_MODULE, |
| .open = &display_open, |
| .write = &vfd_write, |
| .release = &display_close, |
| .llseek = noop_llseek, |
| }; |
| |
| /* |
| * 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 = 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; |
| |
| /* 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); |
| } |
| |
| 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 = NULL; |
| |
| 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); |
| 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 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; |
| |
| /* |
| * 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 (buf[7] == 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; |
| int intfnum = 0; |
| |
| if (!urb) |
| return; |
| |
| context = (struct imon_context *)urb->context; |
| if (!context) |
| return; |
| |
| 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; |
| struct imon_context *context = NULL; |
| int i; |
| u16 vendor, product; |
| |
| /* prevent races probing devices w/multiple interfaces */ |
| mutex_lock(&driver_lock); |
| |
| 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; |
| |
| 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); |
| |
| /* |
| * 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 = BUF_CHUNK_SIZE * 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 unlock; |
| } 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); |
| |
| unlock: |
| mutex_unlock(&context->ctx_lock); |
| alloc_status_switch: |
| |
| 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); |