diff options
Diffstat (limited to 'drivers/usb/input/keyspan_remote.c')
| -rw-r--r-- | drivers/usb/input/keyspan_remote.c | 592 |
1 files changed, 0 insertions, 592 deletions
diff --git a/drivers/usb/input/keyspan_remote.c b/drivers/usb/input/keyspan_remote.c deleted file mode 100644 index 1bffc9fa98c2..000000000000 --- a/drivers/usb/input/keyspan_remote.c +++ /dev/null @@ -1,592 +0,0 @@ -/* - * keyspan_remote: USB driver for the Keyspan DMR - * - * Copyright (C) 2005 Zymeta Corporation - Michael Downey (downey@zymeta.com) - * - * 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, version 2. - * - * This driver has been put together with the support of Innosys, Inc. - * and Keyspan, Inc the manufacturers of the Keyspan USB DMR product. - */ - -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/usb/input.h> - -#define DRIVER_VERSION "v0.1" -#define DRIVER_AUTHOR "Michael Downey <downey@zymeta.com>" -#define DRIVER_DESC "Driver for the USB Keyspan remote control." -#define DRIVER_LICENSE "GPL" - -/* Parameters that can be passed to the driver. */ -static int debug; -module_param(debug, int, 0444); -MODULE_PARM_DESC(debug, "Enable extra debug messages and information"); - -/* Vendor and product ids */ -#define USB_KEYSPAN_VENDOR_ID 0x06CD -#define USB_KEYSPAN_PRODUCT_UIA11 0x0202 - -/* Defines for converting the data from the remote. */ -#define ZERO 0x18 -#define ZERO_MASK 0x1F /* 5 bits for a 0 */ -#define ONE 0x3C -#define ONE_MASK 0x3F /* 6 bits for a 1 */ -#define SYNC 0x3F80 -#define SYNC_MASK 0x3FFF /* 14 bits for a SYNC sequence */ -#define STOP 0x00 -#define STOP_MASK 0x1F /* 5 bits for the STOP sequence */ -#define GAP 0xFF - -#define RECV_SIZE 8 /* The UIA-11 type have a 8 byte limit. */ - -/* table of devices that work with this driver */ -static struct usb_device_id keyspan_table[] = { - { USB_DEVICE(USB_KEYSPAN_VENDOR_ID, USB_KEYSPAN_PRODUCT_UIA11) }, - { } /* Terminating entry */ -}; - -/* Structure to store all the real stuff that a remote sends to us. */ -struct keyspan_message { - u16 system; - u8 button; - u8 toggle; -}; - -/* Structure used for all the bit testing magic needed to be done. */ -struct bit_tester { - u32 tester; - int len; - int pos; - int bits_left; - u8 buffer[32]; -}; - -/* Structure to hold all of our driver specific stuff */ -struct usb_keyspan { - char name[128]; - char phys[64]; - struct usb_device* udev; - struct input_dev *input; - struct usb_interface* interface; - struct usb_endpoint_descriptor* in_endpoint; - struct urb* irq_urb; - int open; - dma_addr_t in_dma; - unsigned char* in_buffer; - - /* variables used to parse messages from remote. */ - struct bit_tester data; - int stage; - int toggle; -}; - -/* - * Table that maps the 31 possible keycodes to input keys. - * Currently there are 15 and 17 button models so RESERVED codes - * are blank areas in the mapping. - */ -static const int keyspan_key_table[] = { - KEY_RESERVED, /* 0 is just a place holder. */ - KEY_RESERVED, - KEY_STOP, - KEY_PLAYCD, - KEY_RESERVED, - KEY_PREVIOUSSONG, - KEY_REWIND, - KEY_FORWARD, - KEY_NEXTSONG, - KEY_RESERVED, - KEY_RESERVED, - KEY_RESERVED, - KEY_PAUSE, - KEY_VOLUMEUP, - KEY_RESERVED, - KEY_RESERVED, - KEY_RESERVED, - KEY_VOLUMEDOWN, - KEY_RESERVED, - KEY_UP, - KEY_RESERVED, - KEY_MUTE, - KEY_LEFT, - KEY_ENTER, - KEY_RIGHT, - KEY_RESERVED, - KEY_RESERVED, - KEY_DOWN, - KEY_RESERVED, - KEY_KPASTERISK, - KEY_RESERVED, - KEY_MENU -}; - -static struct usb_driver keyspan_driver; - -/* - * Debug routine that prints out what we've received from the remote. - */ -static void keyspan_print(struct usb_keyspan* dev) /*unsigned char* data)*/ -{ - char codes[4 * RECV_SIZE]; - int i; - - for (i = 0; i < RECV_SIZE; i++) - snprintf(codes + i * 3, 4, "%02x ", dev->in_buffer[i]); - - dev_info(&dev->udev->dev, "%s\n", codes); -} - -/* - * Routine that manages the bit_tester structure. It makes sure that there are - * at least bits_needed bits loaded into the tester. - */ -static int keyspan_load_tester(struct usb_keyspan* dev, int bits_needed) -{ - if (dev->data.bits_left >= bits_needed) - return 0; - - /* - * Somehow we've missed the last message. The message will be repeated - * though so it's not too big a deal - */ - if (dev->data.pos >= dev->data.len) { - dev_dbg(&dev->udev->dev, - "%s - Error ran out of data. pos: %d, len: %d\n", - __FUNCTION__, dev->data.pos, dev->data.len); - return -1; - } - - /* Load as much as we can into the tester. */ - while ((dev->data.bits_left + 7 < (sizeof(dev->data.tester) * 8)) && - (dev->data.pos < dev->data.len)) { - dev->data.tester += (dev->data.buffer[dev->data.pos++] << dev->data.bits_left); - dev->data.bits_left += 8; - } - - return 0; -} - -/* - * Routine that handles all the logic needed to parse out the message from the remote. - */ -static void keyspan_check_data(struct usb_keyspan *remote) -{ - int i; - int found = 0; - struct keyspan_message message; - - switch(remote->stage) { - case 0: - /* - * In stage 0 we want to find the start of a message. The remote sends a 0xFF as filler. - * So the first byte that isn't a FF should be the start of a new message. - */ - for (i = 0; i < RECV_SIZE && remote->in_buffer[i] == GAP; ++i); - - if (i < RECV_SIZE) { - memcpy(remote->data.buffer, remote->in_buffer, RECV_SIZE); - remote->data.len = RECV_SIZE; - remote->data.pos = 0; - remote->data.tester = 0; - remote->data.bits_left = 0; - remote->stage = 1; - } - break; - - case 1: - /* - * Stage 1 we should have 16 bytes and should be able to detect a - * SYNC. The SYNC is 14 bits, 7 0's and then 7 1's. - */ - memcpy(remote->data.buffer + remote->data.len, remote->in_buffer, RECV_SIZE); - remote->data.len += RECV_SIZE; - - found = 0; - while ((remote->data.bits_left >= 14 || remote->data.pos < remote->data.len) && !found) { - for (i = 0; i < 8; ++i) { - if (keyspan_load_tester(remote, 14) != 0) { - remote->stage = 0; - return; - } - - if ((remote->data.tester & SYNC_MASK) == SYNC) { - remote->data.tester = remote->data.tester >> 14; - remote->data.bits_left -= 14; - found = 1; - break; - } else { - remote->data.tester = remote->data.tester >> 1; - --remote->data.bits_left; - } - } - } - - if (!found) { - remote->stage = 0; - remote->data.len = 0; - } else { - remote->stage = 2; - } - break; - - case 2: - /* - * Stage 2 we should have 24 bytes which will be enough for a full - * message. We need to parse out the system code, button code, - * toggle code, and stop. - */ - memcpy(remote->data.buffer + remote->data.len, remote->in_buffer, RECV_SIZE); - remote->data.len += RECV_SIZE; - - message.system = 0; - for (i = 0; i < 9; i++) { - keyspan_load_tester(remote, 6); - - if ((remote->data.tester & ZERO_MASK) == ZERO) { - message.system = message.system << 1; - remote->data.tester = remote->data.tester >> 5; - remote->data.bits_left -= 5; - } else if ((remote->data.tester & ONE_MASK) == ONE) { - message.system = (message.system << 1) + 1; - remote->data.tester = remote->data.tester >> 6; - remote->data.bits_left -= 6; - } else { - err("%s - Unknown sequence found in system data.\n", __FUNCTION__); - remote->stage = 0; - return; - } - } - - message.button = 0; - for (i = 0; i < 5; i++) { - keyspan_load_tester(remote, 6); - - if ((remote->data.tester & ZERO_MASK) == ZERO) { - message.button = message.button << 1; - remote->data.tester = remote->data.tester >> 5; - remote->data.bits_left -= 5; - } else if ((remote->data.tester & ONE_MASK) == ONE) { - message.button = (message.button << 1) + 1; - remote->data.tester = remote->data.tester >> 6; - remote->data.bits_left -= 6; - } else { - err("%s - Unknown sequence found in button data.\n", __FUNCTION__); - remote->stage = 0; - return; - } - } - - keyspan_load_tester(remote, 6); - if ((remote->data.tester & ZERO_MASK) == ZERO) { - message.toggle = 0; - remote->data.tester = remote->data.tester >> 5; - remote->data.bits_left -= 5; - } else if ((remote->data.tester & ONE_MASK) == ONE) { - message.toggle = 1; - remote->data.tester = remote->data.tester >> 6; - remote->data.bits_left -= 6; - } else { - err("%s - Error in message, invalid toggle.\n", __FUNCTION__); - remote->stage = 0; - return; - } - - keyspan_load_tester(remote, 5); - if ((remote->data.tester & STOP_MASK) == STOP) { - remote->data.tester = remote->data.tester >> 5; - remote->data.bits_left -= 5; - } else { - err("Bad message recieved, no stop bit found.\n"); - } - - dev_dbg(&remote->udev->dev, - "%s found valid message: system: %d, button: %d, toggle: %d\n", - __FUNCTION__, message.system, message.button, message.toggle); - - if (message.toggle != remote->toggle) { - input_report_key(remote->input, keyspan_key_table[message.button], 1); - input_report_key(remote->input, keyspan_key_table[message.button], 0); - input_sync(remote->input); - remote->toggle = message.toggle; - } - - remote->stage = 0; - break; - } -} - -/* - * Routine for sending all the initialization messages to the remote. - */ -static int keyspan_setup(struct usb_device* dev) -{ - int retval = 0; - - retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), - 0x11, 0x40, 0x5601, 0x0, NULL, 0, 0); - if (retval) { - dev_dbg(&dev->dev, "%s - failed to set bit rate due to error: %d\n", - __FUNCTION__, retval); - return(retval); - } - - retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), - 0x44, 0x40, 0x0, 0x0, NULL, 0, 0); - if (retval) { - dev_dbg(&dev->dev, "%s - failed to set resume sensitivity due to error: %d\n", - __FUNCTION__, retval); - return(retval); - } - - retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), - 0x22, 0x40, 0x0, 0x0, NULL, 0, 0); - if (retval) { - dev_dbg(&dev->dev, "%s - failed to turn receive on due to error: %d\n", - __FUNCTION__, retval); - return(retval); - } - - dev_dbg(&dev->dev, "%s - Setup complete.\n", __FUNCTION__); - return(retval); -} - -/* - * Routine used to handle a new message that has come in. - */ -static void keyspan_irq_recv(struct urb *urb) -{ - struct usb_keyspan *dev = urb->context; - int retval; - - /* Check our status in case we need to bail out early. */ - switch (urb->status) { - case 0: - break; - - /* Device went away so don't keep trying to read from it. */ - case -ECONNRESET: - case -ENOENT: - case -ESHUTDOWN: - return; - - default: - goto resubmit; - break; - } - - if (debug) - keyspan_print(dev); - - keyspan_check_data(dev); - -resubmit: - retval = usb_submit_urb(urb, GFP_ATOMIC); - if (retval) - err ("%s - usb_submit_urb failed with result: %d", __FUNCTION__, retval); -} - -static int keyspan_open(struct input_dev *dev) -{ - struct usb_keyspan *remote = input_get_drvdata(dev); - - remote->irq_urb->dev = remote->udev; - if (usb_submit_urb(remote->irq_urb, GFP_KERNEL)) - return -EIO; - - return 0; -} - -static void keyspan_close(struct input_dev *dev) -{ - struct usb_keyspan *remote = input_get_drvdata(dev); - - usb_kill_urb(remote->irq_urb); -} - -static struct usb_endpoint_descriptor *keyspan_get_in_endpoint(struct usb_host_interface *iface) -{ - - struct usb_endpoint_descriptor *endpoint; - int i; - - for (i = 0; i < iface->desc.bNumEndpoints; ++i) { - endpoint = &iface->endpoint[i].desc; - - if (usb_endpoint_is_int_in(endpoint)) { - /* we found our interrupt in endpoint */ - return endpoint; - } - } - - return NULL; -} - -/* - * Routine that sets up the driver to handle a specific USB device detected on the bus. - */ -static int keyspan_probe(struct usb_interface *interface, const struct usb_device_id *id) -{ - struct usb_device *udev = interface_to_usbdev(interface); - struct usb_endpoint_descriptor *endpoint; - struct usb_keyspan *remote; - struct input_dev *input_dev; - int i, error; - - endpoint = keyspan_get_in_endpoint(interface->cur_altsetting); - if (!endpoint) - return -ENODEV; - - remote = kzalloc(sizeof(*remote), GFP_KERNEL); - input_dev = input_allocate_device(); - if (!remote || !input_dev) { - error = -ENOMEM; - goto fail1; - } - - remote->udev = udev; - remote->input = input_dev; - remote->interface = interface; - remote->in_endpoint = endpoint; - remote->toggle = -1; /* Set to -1 so we will always not match the toggle from the first remote message. */ - - remote->in_buffer = usb_buffer_alloc(udev, RECV_SIZE, GFP_ATOMIC, &remote->in_dma); - if (!remote->in_buffer) { - error = -ENOMEM; - goto fail1; - } - - remote->irq_urb = usb_alloc_urb(0, GFP_KERNEL); - if (!remote->irq_urb) { - error = -ENOMEM; - goto fail2; - } - - error = keyspan_setup(udev); - if (error) { - error = -ENODEV; - goto fail3; - } - - if (udev->manufacturer) - strlcpy(remote->name, udev->manufacturer, sizeof(remote->name)); - - if (udev->product) { - if (udev->manufacturer) - strlcat(remote->name, " ", sizeof(remote->name)); - strlcat(remote->name, udev->product, sizeof(remote->name)); - } - - if (!strlen(remote->name)) - snprintf(remote->name, sizeof(remote->name), - "USB Keyspan Remote %04x:%04x", - le16_to_cpu(udev->descriptor.idVendor), - le16_to_cpu(udev->descriptor.idProduct)); - - usb_make_path(udev, remote->phys, sizeof(remote->phys)); - strlcat(remote->phys, "/input0", sizeof(remote->phys)); - - input_dev->name = remote->name; - input_dev->phys = remote->phys; - usb_to_input_id(udev, &input_dev->id); - input_dev->dev.parent = &interface->dev; - - input_dev->evbit[0] = BIT(EV_KEY); /* We will only report KEY events. */ - for (i = 0; i < ARRAY_SIZE(keyspan_key_table); i++) - if (keyspan_key_table[i] != KEY_RESERVED) - set_bit(keyspan_key_table[i], input_dev->keybit); - - input_set_drvdata(input_dev, remote); - - input_dev->open = keyspan_open; - input_dev->close = keyspan_close; - - /* - * Initialize the URB to access the device. The urb gets sent to the device in keyspan_open() - */ - usb_fill_int_urb(remote->irq_urb, - remote->udev, usb_rcvintpipe(remote->udev, remote->in_endpoint->bEndpointAddress), - remote->in_buffer, RECV_SIZE, keyspan_irq_recv, remote, - remote->in_endpoint->bInterval); - remote->irq_urb->transfer_dma = remote->in_dma; - remote->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; - - /* we can register the device now, as it is ready */ - error = input_register_device(remote->input); - if (error) - goto fail3; - - /* save our data pointer in this interface device */ - usb_set_intfdata(interface, remote); - - return 0; - - fail3: usb_free_urb(remote->irq_urb); - fail2: usb_buffer_free(udev, RECV_SIZE, remote->in_buffer, remote->in_dma); - fail1: kfree(remote); - input_free_device(input_dev); - - return error; -} - -/* - * Routine called when a device is disconnected from the USB. - */ -static void keyspan_disconnect(struct usb_interface *interface) -{ - struct usb_keyspan *remote; - - remote = usb_get_intfdata(interface); - usb_set_intfdata(interface, NULL); - - if (remote) { /* We have a valid driver structure so clean up everything we allocated. */ - input_unregister_device(remote->input); - usb_kill_urb(remote->irq_urb); - usb_free_urb(remote->irq_urb); - usb_buffer_free(remote->udev, RECV_SIZE, remote->in_buffer, remote->in_dma); - kfree(remote); - } -} - -/* - * Standard driver set up sections - */ -static struct usb_driver keyspan_driver = -{ - .name = "keyspan_remote", - .probe = keyspan_probe, - .disconnect = keyspan_disconnect, - .id_table = keyspan_table -}; - -static int __init usb_keyspan_init(void) -{ - int result; - - /* register this driver with the USB subsystem */ - result = usb_register(&keyspan_driver); - if (result) - err("usb_register failed. Error number %d\n", result); - - return result; -} - -static void __exit usb_keyspan_exit(void) -{ - /* deregister this driver with the USB subsystem */ - usb_deregister(&keyspan_driver); -} - -module_init(usb_keyspan_init); -module_exit(usb_keyspan_exit); - -MODULE_DEVICE_TABLE(usb, keyspan_table); -MODULE_AUTHOR(DRIVER_AUTHOR); -MODULE_DESCRIPTION(DRIVER_DESC); -MODULE_LICENSE(DRIVER_LICENSE); |