diff options
Diffstat (limited to 'drivers/net/irda/ks959-sir.c')
| -rw-r--r-- | drivers/net/irda/ks959-sir.c | 912 |
1 files changed, 0 insertions, 912 deletions
diff --git a/drivers/net/irda/ks959-sir.c b/drivers/net/irda/ks959-sir.c deleted file mode 100644 index 8025741e7586..000000000000 --- a/drivers/net/irda/ks959-sir.c +++ /dev/null @@ -1,912 +0,0 @@ -/***************************************************************************** -* -* Filename: ks959-sir.c -* Version: 0.1.2 -* Description: Irda KingSun KS-959 USB Dongle -* Status: Experimental -* Author: Alex Villacís Lasso <a_villacis@palosanto.com> -* with help from Domen Puncer <domen@coderock.org> -* -* Based on stir4200, mcs7780, kingsun-sir drivers. -* -* 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. -* -* 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. -* -*****************************************************************************/ - -/* - * Following is my most current (2007-07-17) understanding of how the Kingsun - * KS-959 dongle is supposed to work. This information was deduced by - * reverse-engineering and examining the USB traffic captured with USBSnoopy - * from the WinXP driver. Feel free to update here as more of the dongle is - * known. - * - * My most sincere thanks must go to Domen Puncer <domen@coderock.org> for - * invaluable help in cracking the obfuscation and padding required for this - * dongle. - * - * General: This dongle exposes one interface with one interrupt IN endpoint. - * However, the interrupt endpoint is NOT used at all for this dongle. Instead, - * this dongle uses control transfers for everything, including sending and - * receiving the IrDA frame data. Apparently the interrupt endpoint is just a - * dummy to ensure the dongle has a valid interface to present to the PC.And I - * thought the DonShine dongle was weird... In addition, this dongle uses - * obfuscation (?!?!), applied at the USB level, to hide the traffic, both sent - * and received, from the dongle. I call it obfuscation because the XOR keying - * and padding required to produce an USB traffic acceptable for the dongle can - * not be explained by any other technical requirement. - * - * Transmission: To transmit an IrDA frame, the driver must prepare a control - * URB with the following as a setup packet: - * bRequestType USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE - * bRequest 0x09 - * wValue <length of valid data before padding, little endian> - * wIndex 0x0000 - * wLength <length of padded data> - * The payload packet must be manually wrapped and escaped (as in stir4200.c), - * then padded and obfuscated before being sent. Both padding and obfuscation - * are implemented in the procedure obfuscate_tx_buffer(). Suffice to say, the - * designer/programmer of the dongle used his name as a source for the - * obfuscation. WTF?! - * Apparently the dongle cannot handle payloads larger than 256 bytes. The - * driver has to perform fragmentation in order to send anything larger than - * this limit. - * - * Reception: To receive data, the driver must poll the dongle regularly (like - * kingsun-sir.c) with control URBs and the following as a setup packet: - * bRequestType USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE - * bRequest 0x01 - * wValue 0x0200 - * wIndex 0x0000 - * wLength 0x0800 (size of available buffer) - * If there is data to be read, it will be returned as the response payload. - * This data is (apparently) not padded, but it is obfuscated. To de-obfuscate - * it, the driver must XOR every byte, in sequence, with a value that starts at - * 1 and is incremented with each byte processed, and then with 0x55. The value - * incremented with each byte processed overflows as an unsigned char. The - * resulting bytes form a wrapped SIR frame that is unwrapped and unescaped - * as in stir4200.c The incremented value is NOT reset with each frame, but is - * kept across the entire session with the dongle. Also, the dongle inserts an - * extra garbage byte with value 0x95 (after decoding) every 0xff bytes, which - * must be skipped. - * - * Speed change: To change the speed of the dongle, the driver prepares a - * control URB with the following as a setup packet: - * bRequestType USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE - * bRequest 0x09 - * wValue 0x0200 - * wIndex 0x0001 - * wLength 0x0008 (length of the payload) - * The payload is a 8-byte record, apparently identical to the one used in - * drivers/usb/serial/cypress_m8.c to change speed: - * __u32 baudSpeed; - * unsigned int dataBits : 2; // 0 - 5 bits 3 - 8 bits - * unsigned int : 1; - * unsigned int stopBits : 1; - * unsigned int parityEnable : 1; - * unsigned int parityType : 1; - * unsigned int : 1; - * unsigned int reset : 1; - * unsigned char reserved[3]; // set to 0 - * - * For now only SIR speeds have been observed with this dongle. Therefore, - * nothing is known on what changes (if any) must be done to frame wrapping / - * unwrapping for higher than SIR speeds. This driver assumes no change is - * necessary and announces support for all the way to 57600 bps. Although the - * package announces support for up to 4MBps, tests with a Sony Ericcson K300 - * phone show corruption when receiving large frames at 115200 bps, the highest - * speed announced by the phone. However, transmission at 115200 bps is OK. Go - * figure. Since I don't know whether the phone or the dongle is at fault, max - * announced speed is 57600 bps until someone produces a device that can run - * at higher speeds with this dongle. - */ - -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/slab.h> -#include <linux/usb.h> -#include <linux/device.h> -#include <linux/crc32.h> - -#include <asm/unaligned.h> -#include <asm/byteorder.h> -#include <linux/uaccess.h> - -#include <net/irda/irda.h> -#include <net/irda/wrapper.h> -#include <net/irda/crc.h> - -#define KS959_VENDOR_ID 0x07d0 -#define KS959_PRODUCT_ID 0x4959 - -/* These are the currently known USB ids */ -static const struct usb_device_id dongles[] = { - /* KingSun Co,Ltd IrDA/USB Bridge */ - {USB_DEVICE(KS959_VENDOR_ID, KS959_PRODUCT_ID)}, - {} -}; - -MODULE_DEVICE_TABLE(usb, dongles); - -#define KINGSUN_MTT 0x07 -#define KINGSUN_REQ_RECV 0x01 -#define KINGSUN_REQ_SEND 0x09 - -#define KINGSUN_RCV_FIFO_SIZE 2048 /* Max length we can receive */ -#define KINGSUN_SND_FIFO_SIZE 2048 /* Max packet we can send */ -#define KINGSUN_SND_PACKET_SIZE 256 /* Max packet dongle can handle */ - -struct ks959_speedparams { - __le32 baudrate; /* baud rate, little endian */ - __u8 flags; - __u8 reserved[3]; -} __packed; - -#define KS_DATA_5_BITS 0x00 -#define KS_DATA_6_BITS 0x01 -#define KS_DATA_7_BITS 0x02 -#define KS_DATA_8_BITS 0x03 - -#define KS_STOP_BITS_1 0x00 -#define KS_STOP_BITS_2 0x08 - -#define KS_PAR_DISABLE 0x00 -#define KS_PAR_EVEN 0x10 -#define KS_PAR_ODD 0x30 -#define KS_RESET 0x80 - -struct ks959_cb { - struct usb_device *usbdev; /* init: probe_irda */ - struct net_device *netdev; /* network layer */ - struct irlap_cb *irlap; /* The link layer we are binded to */ - - struct qos_info qos; - - struct usb_ctrlrequest *tx_setuprequest; - struct urb *tx_urb; - __u8 *tx_buf_clear; - unsigned int tx_buf_clear_used; - unsigned int tx_buf_clear_sent; - __u8 *tx_buf_xored; - - struct usb_ctrlrequest *rx_setuprequest; - struct urb *rx_urb; - __u8 *rx_buf; - __u8 rx_variable_xormask; - iobuff_t rx_unwrap_buff; - - struct usb_ctrlrequest *speed_setuprequest; - struct urb *speed_urb; - struct ks959_speedparams speedparams; - unsigned int new_speed; - - spinlock_t lock; - int receiving; -}; - -/* Procedure to perform the obfuscation/padding expected by the dongle - * - * buf_cleartext (IN) Cleartext version of the IrDA frame to transmit - * len_cleartext (IN) Length of the cleartext version of IrDA frame - * buf_xoredtext (OUT) Obfuscated version of frame built by proc - * len_maxbuf (OUT) Maximum space available at buf_xoredtext - * - * (return) length of obfuscated frame with padding - * - * If not enough space (as indicated by len_maxbuf vs. required padding), - * zero is returned - * - * The value of lookup_string is actually a required portion of the algorithm. - * Seems the designer of the dongle wanted to state who exactly is responsible - * for implementing obfuscation. Send your best (or other) wishes to him ]:-) - */ -static unsigned int obfuscate_tx_buffer(const __u8 * buf_cleartext, - unsigned int len_cleartext, - __u8 * buf_xoredtext, - unsigned int len_maxbuf) -{ - unsigned int len_xoredtext; - - /* Calculate required length with padding, check for necessary space */ - len_xoredtext = ((len_cleartext + 7) & ~0x7) + 0x10; - if (len_xoredtext <= len_maxbuf) { - static const __u8 lookup_string[] = "wangshuofei19710"; - __u8 xor_mask; - - /* Unlike the WinXP driver, we *do* clear out the padding */ - memset(buf_xoredtext, 0, len_xoredtext); - - xor_mask = lookup_string[(len_cleartext & 0x0f) ^ 0x06] ^ 0x55; - - while (len_cleartext-- > 0) { - *buf_xoredtext++ = *buf_cleartext++ ^ xor_mask; - } - } else { - len_xoredtext = 0; - } - return len_xoredtext; -} - -/* Callback transmission routine */ -static void ks959_speed_irq(struct urb *urb) -{ - /* unlink, shutdown, unplug, other nasties */ - if (urb->status != 0) { - dev_err(&urb->dev->dev, - "ks959_speed_irq: urb asynchronously failed - %d\n", - urb->status); - } -} - -/* Send a control request to change speed of the dongle */ -static int ks959_change_speed(struct ks959_cb *kingsun, unsigned speed) -{ - static unsigned int supported_speeds[] = { 2400, 9600, 19200, 38400, - 57600, 115200, 576000, 1152000, 4000000, 0 - }; - int err; - unsigned int i; - - if (kingsun->speed_setuprequest == NULL || kingsun->speed_urb == NULL) - return -ENOMEM; - - /* Check that requested speed is among the supported ones */ - for (i = 0; supported_speeds[i] && supported_speeds[i] != speed; i++) ; - if (supported_speeds[i] == 0) - return -EOPNOTSUPP; - - memset(&(kingsun->speedparams), 0, sizeof(struct ks959_speedparams)); - kingsun->speedparams.baudrate = cpu_to_le32(speed); - kingsun->speedparams.flags = KS_DATA_8_BITS; - - /* speed_setuprequest pre-filled in ks959_probe */ - usb_fill_control_urb(kingsun->speed_urb, kingsun->usbdev, - usb_sndctrlpipe(kingsun->usbdev, 0), - (unsigned char *)kingsun->speed_setuprequest, - &(kingsun->speedparams), - sizeof(struct ks959_speedparams), ks959_speed_irq, - kingsun); - kingsun->speed_urb->status = 0; - err = usb_submit_urb(kingsun->speed_urb, GFP_ATOMIC); - - return err; -} - -/* Submit one fragment of an IrDA frame to the dongle */ -static void ks959_send_irq(struct urb *urb); -static int ks959_submit_tx_fragment(struct ks959_cb *kingsun) -{ - unsigned int padlen; - unsigned int wraplen; - int ret; - - /* Check whether current plaintext can produce a padded buffer that fits - within the range handled by the dongle */ - wraplen = (KINGSUN_SND_PACKET_SIZE & ~0x7) - 0x10; - if (wraplen > kingsun->tx_buf_clear_used) - wraplen = kingsun->tx_buf_clear_used; - - /* Perform dongle obfuscation. Also remove the portion of the frame that - was just obfuscated and will now be sent to the dongle. */ - padlen = obfuscate_tx_buffer(kingsun->tx_buf_clear, wraplen, - kingsun->tx_buf_xored, - KINGSUN_SND_PACKET_SIZE); - - /* Calculate how much data can be transmitted in this urb */ - kingsun->tx_setuprequest->wValue = cpu_to_le16(wraplen); - kingsun->tx_setuprequest->wLength = cpu_to_le16(padlen); - /* Rest of the fields were filled in ks959_probe */ - usb_fill_control_urb(kingsun->tx_urb, kingsun->usbdev, - usb_sndctrlpipe(kingsun->usbdev, 0), - (unsigned char *)kingsun->tx_setuprequest, - kingsun->tx_buf_xored, padlen, - ks959_send_irq, kingsun); - kingsun->tx_urb->status = 0; - ret = usb_submit_urb(kingsun->tx_urb, GFP_ATOMIC); - - /* Remember how much data was sent, in order to update at callback */ - kingsun->tx_buf_clear_sent = (ret == 0) ? wraplen : 0; - return ret; -} - -/* Callback transmission routine */ -static void ks959_send_irq(struct urb *urb) -{ - struct ks959_cb *kingsun = urb->context; - struct net_device *netdev = kingsun->netdev; - int ret = 0; - - /* in process of stopping, just drop data */ - if (!netif_running(kingsun->netdev)) { - dev_err(&kingsun->usbdev->dev, - "ks959_send_irq: Network not running!\n"); - return; - } - - /* unlink, shutdown, unplug, other nasties */ - if (urb->status != 0) { - dev_err(&kingsun->usbdev->dev, - "ks959_send_irq: urb asynchronously failed - %d\n", - urb->status); - return; - } - - if (kingsun->tx_buf_clear_used > 0) { - /* Update data remaining to be sent */ - if (kingsun->tx_buf_clear_sent < kingsun->tx_buf_clear_used) { - memmove(kingsun->tx_buf_clear, - kingsun->tx_buf_clear + - kingsun->tx_buf_clear_sent, - kingsun->tx_buf_clear_used - - kingsun->tx_buf_clear_sent); - } - kingsun->tx_buf_clear_used -= kingsun->tx_buf_clear_sent; - kingsun->tx_buf_clear_sent = 0; - - if (kingsun->tx_buf_clear_used > 0) { - /* There is more data to be sent */ - if ((ret = ks959_submit_tx_fragment(kingsun)) != 0) { - dev_err(&kingsun->usbdev->dev, - "ks959_send_irq: failed tx_urb submit: %d\n", - ret); - switch (ret) { - case -ENODEV: - case -EPIPE: - break; - default: - netdev->stats.tx_errors++; - netif_start_queue(netdev); - } - } - } else { - /* All data sent, send next speed && wake network queue */ - if (kingsun->new_speed != -1 && - cpu_to_le32(kingsun->new_speed) != - kingsun->speedparams.baudrate) - ks959_change_speed(kingsun, kingsun->new_speed); - - netif_wake_queue(netdev); - } - } -} - -/* - * Called from net/core when new frame is available. - */ -static netdev_tx_t ks959_hard_xmit(struct sk_buff *skb, - struct net_device *netdev) -{ - struct ks959_cb *kingsun; - unsigned int wraplen; - int ret = 0; - - netif_stop_queue(netdev); - - /* the IRDA wrapping routines don't deal with non linear skb */ - SKB_LINEAR_ASSERT(skb); - - kingsun = netdev_priv(netdev); - - spin_lock(&kingsun->lock); - kingsun->new_speed = irda_get_next_speed(skb); - - /* Append data to the end of whatever data remains to be transmitted */ - wraplen = - async_wrap_skb(skb, kingsun->tx_buf_clear, KINGSUN_SND_FIFO_SIZE); - kingsun->tx_buf_clear_used = wraplen; - - if ((ret = ks959_submit_tx_fragment(kingsun)) != 0) { - dev_err(&kingsun->usbdev->dev, - "ks959_hard_xmit: failed tx_urb submit: %d\n", ret); - switch (ret) { - case -ENODEV: - case -EPIPE: - break; - default: - netdev->stats.tx_errors++; - netif_start_queue(netdev); - } - } else { - netdev->stats.tx_packets++; - netdev->stats.tx_bytes += skb->len; - - } - - dev_kfree_skb(skb); - spin_unlock(&kingsun->lock); - - return NETDEV_TX_OK; -} - -/* Receive callback function */ -static void ks959_rcv_irq(struct urb *urb) -{ - struct ks959_cb *kingsun = urb->context; - int ret; - - /* in process of stopping, just drop data */ - if (!netif_running(kingsun->netdev)) { - kingsun->receiving = 0; - return; - } - - /* unlink, shutdown, unplug, other nasties */ - if (urb->status != 0) { - dev_err(&kingsun->usbdev->dev, - "kingsun_rcv_irq: urb asynchronously failed - %d\n", - urb->status); - kingsun->receiving = 0; - return; - } - - if (urb->actual_length > 0) { - __u8 *bytes = urb->transfer_buffer; - unsigned int i; - - for (i = 0; i < urb->actual_length; i++) { - /* De-obfuscation implemented here: variable portion of - xormask is incremented, and then used with the encoded - byte for the XOR. The result of the operation is used - to unwrap the SIR frame. */ - kingsun->rx_variable_xormask++; - bytes[i] = - bytes[i] ^ kingsun->rx_variable_xormask ^ 0x55u; - - /* rx_variable_xormask doubles as an index counter so we - can skip the byte at 0xff (wrapped around to 0). - */ - if (kingsun->rx_variable_xormask != 0) { - async_unwrap_char(kingsun->netdev, - &kingsun->netdev->stats, - &kingsun->rx_unwrap_buff, - bytes[i]); - } - } - kingsun->receiving = - (kingsun->rx_unwrap_buff.state != OUTSIDE_FRAME) ? 1 : 0; - } - - /* This urb has already been filled in kingsun_net_open. Setup - packet must be re-filled, but it is assumed that urb keeps the - pointer to the initial setup packet, as well as the payload buffer. - Setup packet is already pre-filled at ks959_probe. - */ - urb->status = 0; - ret = usb_submit_urb(urb, GFP_ATOMIC); -} - -/* - * Function kingsun_net_open (dev) - * - * Network device is taken up. Usually this is done by "ifconfig irda0 up" - */ -static int ks959_net_open(struct net_device *netdev) -{ - struct ks959_cb *kingsun = netdev_priv(netdev); - int err = -ENOMEM; - char hwname[16]; - - /* At this point, urbs are NULL, and skb is NULL (see kingsun_probe) */ - kingsun->receiving = 0; - - /* Initialize for SIR to copy data directly into skb. */ - kingsun->rx_unwrap_buff.in_frame = FALSE; - kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME; - kingsun->rx_unwrap_buff.truesize = IRDA_SKB_MAX_MTU; - kingsun->rx_unwrap_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU); - if (!kingsun->rx_unwrap_buff.skb) - goto free_mem; - - skb_reserve(kingsun->rx_unwrap_buff.skb, 1); - kingsun->rx_unwrap_buff.head = kingsun->rx_unwrap_buff.skb->data; - - kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL); - if (!kingsun->rx_urb) - goto free_mem; - - kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL); - if (!kingsun->tx_urb) - goto free_mem; - - kingsun->speed_urb = usb_alloc_urb(0, GFP_KERNEL); - if (!kingsun->speed_urb) - goto free_mem; - - /* Initialize speed for dongle */ - kingsun->new_speed = 9600; - err = ks959_change_speed(kingsun, 9600); - if (err < 0) - goto free_mem; - - /* - * Now that everything should be initialized properly, - * Open new IrLAP layer instance to take care of us... - */ - sprintf(hwname, "usb#%d", kingsun->usbdev->devnum); - kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname); - if (!kingsun->irlap) { - err = -ENOMEM; - dev_err(&kingsun->usbdev->dev, "irlap_open failed\n"); - goto free_mem; - } - - /* Start reception. Setup request already pre-filled in ks959_probe */ - usb_fill_control_urb(kingsun->rx_urb, kingsun->usbdev, - usb_rcvctrlpipe(kingsun->usbdev, 0), - (unsigned char *)kingsun->rx_setuprequest, - kingsun->rx_buf, KINGSUN_RCV_FIFO_SIZE, - ks959_rcv_irq, kingsun); - kingsun->rx_urb->status = 0; - err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL); - if (err) { - dev_err(&kingsun->usbdev->dev, - "first urb-submit failed: %d\n", err); - goto close_irlap; - } - - netif_start_queue(netdev); - - /* Situation at this point: - - all work buffers allocated - - urbs allocated and ready to fill - - max rx packet known (in max_rx) - - unwrap state machine initialized, in state outside of any frame - - receive request in progress - - IrLAP layer started, about to hand over packets to send - */ - - return 0; - - close_irlap: - irlap_close(kingsun->irlap); - free_mem: - usb_free_urb(kingsun->speed_urb); - kingsun->speed_urb = NULL; - usb_free_urb(kingsun->tx_urb); - kingsun->tx_urb = NULL; - usb_free_urb(kingsun->rx_urb); - kingsun->rx_urb = NULL; - if (kingsun->rx_unwrap_buff.skb) { - kfree_skb(kingsun->rx_unwrap_buff.skb); - kingsun->rx_unwrap_buff.skb = NULL; - kingsun->rx_unwrap_buff.head = NULL; - } - return err; -} - -/* - * Function kingsun_net_close (kingsun) - * - * Network device is taken down. Usually this is done by - * "ifconfig irda0 down" - */ -static int ks959_net_close(struct net_device *netdev) -{ - struct ks959_cb *kingsun = netdev_priv(netdev); - - /* Stop transmit processing */ - netif_stop_queue(netdev); - - /* Mop up receive && transmit urb's */ - usb_kill_urb(kingsun->tx_urb); - usb_free_urb(kingsun->tx_urb); - kingsun->tx_urb = NULL; - - usb_kill_urb(kingsun->speed_urb); - usb_free_urb(kingsun->speed_urb); - kingsun->speed_urb = NULL; - - usb_kill_urb(kingsun->rx_urb); - usb_free_urb(kingsun->rx_urb); - kingsun->rx_urb = NULL; - - kfree_skb(kingsun->rx_unwrap_buff.skb); - kingsun->rx_unwrap_buff.skb = NULL; - kingsun->rx_unwrap_buff.head = NULL; - kingsun->rx_unwrap_buff.in_frame = FALSE; - kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME; - kingsun->receiving = 0; - - /* Stop and remove instance of IrLAP */ - if (kingsun->irlap) - irlap_close(kingsun->irlap); - - kingsun->irlap = NULL; - - return 0; -} - -/* - * IOCTLs : Extra out-of-band network commands... - */ -static int ks959_net_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) -{ - struct if_irda_req *irq = (struct if_irda_req *)rq; - struct ks959_cb *kingsun = netdev_priv(netdev); - int ret = 0; - - switch (cmd) { - case SIOCSBANDWIDTH: /* Set bandwidth */ - if (!capable(CAP_NET_ADMIN)) - return -EPERM; - - /* Check if the device is still there */ - if (netif_device_present(kingsun->netdev)) - return ks959_change_speed(kingsun, irq->ifr_baudrate); - break; - - case SIOCSMEDIABUSY: /* Set media busy */ - if (!capable(CAP_NET_ADMIN)) - return -EPERM; - - /* Check if the IrDA stack is still there */ - if (netif_running(kingsun->netdev)) - irda_device_set_media_busy(kingsun->netdev, TRUE); - break; - - case SIOCGRECEIVING: - /* Only approximately true */ - irq->ifr_receiving = kingsun->receiving; - break; - - default: - ret = -EOPNOTSUPP; - } - - return ret; -} - -static const struct net_device_ops ks959_ops = { - .ndo_start_xmit = ks959_hard_xmit, - .ndo_open = ks959_net_open, - .ndo_stop = ks959_net_close, - .ndo_do_ioctl = ks959_net_ioctl, -}; -/* - * This routine is called by the USB subsystem for each new device - * in the system. We need to check if the device is ours, and in - * this case start handling it. - */ -static int ks959_probe(struct usb_interface *intf, - const struct usb_device_id *id) -{ - struct usb_device *dev = interface_to_usbdev(intf); - struct ks959_cb *kingsun = NULL; - struct net_device *net = NULL; - int ret = -ENOMEM; - - /* Allocate network device container. */ - net = alloc_irdadev(sizeof(*kingsun)); - if (!net) - goto err_out1; - - SET_NETDEV_DEV(net, &intf->dev); - kingsun = netdev_priv(net); - kingsun->netdev = net; - kingsun->usbdev = dev; - kingsun->irlap = NULL; - kingsun->tx_setuprequest = NULL; - kingsun->tx_urb = NULL; - kingsun->tx_buf_clear = NULL; - kingsun->tx_buf_xored = NULL; - kingsun->tx_buf_clear_used = 0; - kingsun->tx_buf_clear_sent = 0; - - kingsun->rx_setuprequest = NULL; - kingsun->rx_urb = NULL; - kingsun->rx_buf = NULL; - kingsun->rx_variable_xormask = 0; - kingsun->rx_unwrap_buff.in_frame = FALSE; - kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME; - kingsun->rx_unwrap_buff.skb = NULL; - kingsun->receiving = 0; - spin_lock_init(&kingsun->lock); - - kingsun->speed_setuprequest = NULL; - kingsun->speed_urb = NULL; - kingsun->speedparams.baudrate = 0; - - /* Allocate input buffer */ - kingsun->rx_buf = kmalloc(KINGSUN_RCV_FIFO_SIZE, GFP_KERNEL); - if (!kingsun->rx_buf) - goto free_mem; - - /* Allocate input setup packet */ - kingsun->rx_setuprequest = - kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); - if (!kingsun->rx_setuprequest) - goto free_mem; - kingsun->rx_setuprequest->bRequestType = - USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE; - kingsun->rx_setuprequest->bRequest = KINGSUN_REQ_RECV; - kingsun->rx_setuprequest->wValue = cpu_to_le16(0x0200); - kingsun->rx_setuprequest->wIndex = 0; - kingsun->rx_setuprequest->wLength = cpu_to_le16(KINGSUN_RCV_FIFO_SIZE); - - /* Allocate output buffer */ - kingsun->tx_buf_clear = kmalloc(KINGSUN_SND_FIFO_SIZE, GFP_KERNEL); - if (!kingsun->tx_buf_clear) - goto free_mem; - kingsun->tx_buf_xored = kmalloc(KINGSUN_SND_PACKET_SIZE, GFP_KERNEL); - if (!kingsun->tx_buf_xored) - goto free_mem; - - /* Allocate and initialize output setup packet */ - kingsun->tx_setuprequest = - kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); - if (!kingsun->tx_setuprequest) - goto free_mem; - kingsun->tx_setuprequest->bRequestType = - USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE; - kingsun->tx_setuprequest->bRequest = KINGSUN_REQ_SEND; - kingsun->tx_setuprequest->wValue = 0; - kingsun->tx_setuprequest->wIndex = 0; - kingsun->tx_setuprequest->wLength = 0; - - /* Allocate and initialize speed setup packet */ - kingsun->speed_setuprequest = - kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); - if (!kingsun->speed_setuprequest) - goto free_mem; - kingsun->speed_setuprequest->bRequestType = - USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE; - kingsun->speed_setuprequest->bRequest = KINGSUN_REQ_SEND; - kingsun->speed_setuprequest->wValue = cpu_to_le16(0x0200); - kingsun->speed_setuprequest->wIndex = cpu_to_le16(0x0001); - kingsun->speed_setuprequest->wLength = - cpu_to_le16(sizeof(struct ks959_speedparams)); - - printk(KERN_INFO "KingSun KS-959 IRDA/USB found at address %d, " - "Vendor: %x, Product: %x\n", - dev->devnum, le16_to_cpu(dev->descriptor.idVendor), - le16_to_cpu(dev->descriptor.idProduct)); - - /* Initialize QoS for this device */ - irda_init_max_qos_capabilies(&kingsun->qos); - - /* Baud rates known to be supported. Please uncomment if devices (other - than a SonyEriccson K300 phone) can be shown to support higher speed - with this dongle. - */ - kingsun->qos.baud_rate.bits = - IR_2400 | IR_9600 | IR_19200 | IR_38400 | IR_57600; - kingsun->qos.min_turn_time.bits &= KINGSUN_MTT; - irda_qos_bits_to_value(&kingsun->qos); - - /* Override the network functions we need to use */ - net->netdev_ops = &ks959_ops; - - ret = register_netdev(net); - if (ret != 0) - goto free_mem; - - dev_info(&net->dev, "IrDA: Registered KingSun KS-959 device %s\n", - net->name); - - usb_set_intfdata(intf, kingsun); - - /* Situation at this point: - - all work buffers allocated - - setup requests pre-filled - - urbs not allocated, set to NULL - - max rx packet known (is KINGSUN_FIFO_SIZE) - - unwrap state machine (partially) initialized, but skb == NULL - */ - - return 0; - - free_mem: - kfree(kingsun->speed_setuprequest); - kfree(kingsun->tx_setuprequest); - kfree(kingsun->tx_buf_xored); - kfree(kingsun->tx_buf_clear); - kfree(kingsun->rx_setuprequest); - kfree(kingsun->rx_buf); - free_netdev(net); - err_out1: - return ret; -} - -/* - * The current device is removed, the USB layer tell us to shut it down... - */ -static void ks959_disconnect(struct usb_interface *intf) -{ - struct ks959_cb *kingsun = usb_get_intfdata(intf); - - if (!kingsun) - return; - - unregister_netdev(kingsun->netdev); - - /* Mop up receive && transmit urb's */ - if (kingsun->speed_urb != NULL) { - usb_kill_urb(kingsun->speed_urb); - usb_free_urb(kingsun->speed_urb); - kingsun->speed_urb = NULL; - } - if (kingsun->tx_urb != NULL) { - usb_kill_urb(kingsun->tx_urb); - usb_free_urb(kingsun->tx_urb); - kingsun->tx_urb = NULL; - } - if (kingsun->rx_urb != NULL) { - usb_kill_urb(kingsun->rx_urb); - usb_free_urb(kingsun->rx_urb); - kingsun->rx_urb = NULL; - } - - kfree(kingsun->speed_setuprequest); - kfree(kingsun->tx_setuprequest); - kfree(kingsun->tx_buf_xored); - kfree(kingsun->tx_buf_clear); - kfree(kingsun->rx_setuprequest); - kfree(kingsun->rx_buf); - free_netdev(kingsun->netdev); - - usb_set_intfdata(intf, NULL); -} - -#ifdef CONFIG_PM -/* USB suspend, so power off the transmitter/receiver */ -static int ks959_suspend(struct usb_interface *intf, pm_message_t message) -{ - struct ks959_cb *kingsun = usb_get_intfdata(intf); - - netif_device_detach(kingsun->netdev); - if (kingsun->speed_urb != NULL) - usb_kill_urb(kingsun->speed_urb); - if (kingsun->tx_urb != NULL) - usb_kill_urb(kingsun->tx_urb); - if (kingsun->rx_urb != NULL) - usb_kill_urb(kingsun->rx_urb); - return 0; -} - -/* Coming out of suspend, so reset hardware */ -static int ks959_resume(struct usb_interface *intf) -{ - struct ks959_cb *kingsun = usb_get_intfdata(intf); - - if (kingsun->rx_urb != NULL) { - /* Setup request already filled in ks959_probe */ - usb_submit_urb(kingsun->rx_urb, GFP_KERNEL); - } - netif_device_attach(kingsun->netdev); - - return 0; -} -#endif - -/* - * USB device callbacks - */ -static struct usb_driver irda_driver = { - .name = "ks959-sir", - .probe = ks959_probe, - .disconnect = ks959_disconnect, - .id_table = dongles, -#ifdef CONFIG_PM - .suspend = ks959_suspend, - .resume = ks959_resume, -#endif -}; - -module_usb_driver(irda_driver); - -MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>"); -MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun KS-959"); -MODULE_LICENSE("GPL"); |