--- /dev/null
+/*****************************************************************************
+*
+* Filename: ksdazzle.c
+* Version: 0.1.1
+* Description: Irda KingSun Dazzle USB Dongle
+* Status: Experimental
+* Author: Alex Villacís Lasso <a_villacis@palosanto.com>
+*
+* 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 (2007-07-26) understanding of how the Kingsun
+ * 07D0:4100 dongle (sometimes known as the MA-660) is supposed to work. This
+ * information was deduced by examining the USB traffic captured with USBSnoopy
+ * from the WinXP driver. Feel free to update here as more of the dongle is
+ * known.
+ *
+ * General: This dongle exposes one interface with two interrupt endpoints, one
+ * IN and one OUT. In this regard, it is similar to what the Kingsun/Donshine
+ * dongle (07c0:4200) exposes. Traffic is raw and needs to be wrapped and
+ * unwrapped manually as in stir4200, kingsun-sir, and ks959-sir.
+ *
+ * Transmission: To transmit an IrDA frame, it is necessary to wrap it, then
+ * split it into multiple segments of up to 7 bytes each, and transmit each in
+ * sequence. It seems that sending a single big block (like kingsun-sir does)
+ * won't work with this dongle. Each segment needs to be prefixed with a value
+ * equal to (unsigned char)0xF8 + <number of bytes in segment>, inside a payload
+ * of exactly 8 bytes. For example, a segment of 1 byte gets prefixed by 0xF9,
+ * and one of 7 bytes gets prefixed by 0xFF. The bytes at the end of the
+ * payload, not considered by the prefix, are ignored (set to 0 by this
+ * implementation).
+ *
+ * Reception: To receive data, the driver must poll the dongle regularly (like
+ * kingsun-sir.c) with interrupt URBs. If data is available, it will be returned
+ * in payloads from 0 to 8 bytes long. When concatenated, these payloads form
+ * a raw IrDA stream that needs to be unwrapped as in stir4200 and kingsun-sir
+ *
+ * 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 115200 bps.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/kref.h>
+#include <linux/usb.h>
+#include <linux/device.h>
+#include <linux/crc32.h>
+
+#include <asm/unaligned.h>
+#include <asm/byteorder.h>
+#include <asm/uaccess.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/wrapper.h>
+#include <net/irda/crc.h>
+
+#define KSDAZZLE_VENDOR_ID 0x07d0
+#define KSDAZZLE_PRODUCT_ID 0x4100
+
+/* These are the currently known USB ids */
+static struct usb_device_id dongles[] = {
+ /* KingSun Co,Ltd IrDA/USB Bridge */
+ {USB_DEVICE(KSDAZZLE_VENDOR_ID, KSDAZZLE_PRODUCT_ID)},
+ {}
+};
+
+MODULE_DEVICE_TABLE(usb, dongles);
+
+#define KINGSUN_MTT 0x07
+#define KINGSUN_REQ_RECV 0x01
+#define KINGSUN_REQ_SEND 0x09
+
+#define KINGSUN_SND_FIFO_SIZE 2048 /* Max packet we can send */
+
+struct ksdazzle_speedparams {
+ __le32 baudrate; /* baud rate, little endian */
+ __u8 flags;
+ __u8 reserved[3];
+} __attribute__ ((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
+
+#define KINGSUN_EP_IN 0
+#define KINGSUN_EP_OUT 1
+
+struct ksdazzle_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 net_device_stats stats; /* network statistics */
+ struct qos_info qos;
+
+ struct urb *tx_urb;
+ __u8 *tx_buf_clear;
+ unsigned int tx_buf_clear_used;
+ unsigned int tx_buf_clear_sent;
+ __u8 tx_payload[8];
+
+ struct urb *rx_urb;
+ __u8 rx_payload[8];
+ iobuff_t rx_unwrap_buff;
+
+ struct usb_ctrlrequest *speed_setuprequest;
+ struct urb *speed_urb;
+ struct ksdazzle_speedparams speedparams;
+ unsigned int new_speed;
+
+ __u8 ep_in;
+ __u8 ep_out;
+
+ spinlock_t lock;
+ int receiving;
+};
+
+/* Callback transmission routine */
+static void ksdazzle_speed_irq(struct urb *urb)
+{
+ /* unlink, shutdown, unplug, other nasties */
+ if (urb->status != 0) {
+ err("ksdazzle_speed_irq: urb asynchronously failed - %d",
+ urb->status);
+ }
+}
+
+/* Send a control request to change speed of the dongle */
+static int ksdazzle_change_speed(struct ksdazzle_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 ksdazzle_speedparams));
+ kingsun->speedparams.baudrate = cpu_to_le32(speed);
+ kingsun->speedparams.flags = KS_DATA_8_BITS;
+
+ /* speed_setuprequest pre-filled in ksdazzle_probe */
+ usb_fill_control_urb(kingsun->speed_urb, kingsun->usbdev,
+ usb_sndctrlpipe(kingsun->usbdev, 0),
+ (unsigned char *)kingsun->speed_setuprequest,
+ &(kingsun->speedparams),
+ sizeof(struct ksdazzle_speedparams),
+ ksdazzle_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 ksdazzle_send_irq(struct urb *urb);
+static int ksdazzle_submit_tx_fragment(struct ksdazzle_cb *kingsun)
+{
+ unsigned int wraplen;
+ int ret;
+
+ /* We can send at most 7 bytes of payload at a time */
+ wraplen = 7;
+ if (wraplen > kingsun->tx_buf_clear_used)
+ wraplen = kingsun->tx_buf_clear_used;
+
+ /* Prepare payload prefix with used length */
+ memset(kingsun->tx_payload, 0, 8);
+ kingsun->tx_payload[0] = (unsigned char)0xf8 + wraplen;
+ memcpy(kingsun->tx_payload + 1, kingsun->tx_buf_clear, wraplen);
+
+ usb_fill_int_urb(kingsun->tx_urb, kingsun->usbdev,
+ usb_sndintpipe(kingsun->usbdev, kingsun->ep_out),
+ kingsun->tx_payload, 8, ksdazzle_send_irq, kingsun, 1);
+ 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 ksdazzle_send_irq(struct urb *urb)
+{
+ struct ksdazzle_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)) {
+ err("ksdazzle_send_irq: Network not running!");
+ return;
+ }
+
+ /* unlink, shutdown, unplug, other nasties */
+ if (urb->status != 0) {
+ err("ksdazzle_send_irq: urb asynchronously failed - %d",
+ 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 = ksdazzle_submit_tx_fragment(kingsun)) != 0) {
+ err("ksdazzle_send_irq: failed tx_urb submit: %d", ret);
+ switch (ret) {
+ case -ENODEV:
+ case -EPIPE:
+ break;
+ default:
+ kingsun->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)
+ ksdazzle_change_speed(kingsun,
+ kingsun->new_speed);
+
+ netif_wake_queue(netdev);
+ }
+ }
+}
+
+/*
+ * Called from net/core when new frame is available.
+ */
+static int ksdazzle_hard_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+ struct ksdazzle_cb *kingsun;
+ unsigned int wraplen;
+ int ret = 0;
+
+ if (skb == NULL || netdev == NULL)
+ return -EINVAL;
+
+ 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 = ksdazzle_submit_tx_fragment(kingsun)) != 0) {
+ err("ksdazzle_hard_xmit: failed tx_urb submit: %d", ret);
+ switch (ret) {
+ case -ENODEV:
+ case -EPIPE:
+ break;
+ default:
+ kingsun->stats.tx_errors++;
+ netif_start_queue(netdev);
+ }
+ } else {
+ kingsun->stats.tx_packets++;
+ kingsun->stats.tx_bytes += skb->len;
+
+ }
+
+ dev_kfree_skb(skb);
+ spin_unlock(&kingsun->lock);
+
+ return ret;
+}
+
+/* Receive callback function */
+static void ksdazzle_rcv_irq(struct urb *urb)
+{
+ struct ksdazzle_cb *kingsun = urb->context;
+
+ /* 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) {
+ err("ksdazzle_rcv_irq: urb asynchronously failed - %d",
+ 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++) {
+ async_unwrap_char(kingsun->netdev, &kingsun->stats,
+ &kingsun->rx_unwrap_buff, bytes[i]);
+ }
+ kingsun->netdev->last_rx = jiffies;
+ kingsun->receiving =
+ (kingsun->rx_unwrap_buff.state != OUTSIDE_FRAME) ? 1 : 0;
+ }
+
+ /* This urb has already been filled in ksdazzle_net_open. It is assumed that
+ urb keeps the pointer to the payload buffer.
+ */
+ urb->status = 0;
+ usb_submit_urb(urb, GFP_ATOMIC);
+}
+
+/*
+ * Function ksdazzle_net_open (dev)
+ *
+ * Network device is taken up. Usually this is done by "ifconfig irda0 up"
+ */
+static int ksdazzle_net_open(struct net_device *netdev)
+{
+ struct ksdazzle_cb *kingsun = netdev_priv(netdev);
+ int err = -ENOMEM;
+ char hwname[16];
+
+ /* At this point, urbs are NULL, and skb is NULL (see ksdazzle_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 = ksdazzle_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("ksdazzle-sir: irlap_open failed");
+ goto free_mem;
+ }
+
+ /* Start reception. */
+ usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev,
+ usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in),
+ kingsun->rx_payload, 8, ksdazzle_rcv_irq, kingsun, 1);
+ kingsun->rx_urb->status = 0;
+ err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL);
+ if (err) {
+ err("ksdazzle-sir: first urb-submit failed: %d", 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 ksdazzle_net_close (dev)
+ *
+ * Network device is taken down. Usually this is done by
+ * "ifconfig irda0 down"
+ */
+static int ksdazzle_net_close(struct net_device *netdev)
+{
+ struct ksdazzle_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 */
+ irlap_close(kingsun->irlap);
+
+ kingsun->irlap = NULL;
+
+ return 0;
+}
+
+/*
+ * IOCTLs : Extra out-of-band network commands...
+ */
+static int ksdazzle_net_ioctl(struct net_device *netdev, struct ifreq *rq,
+ int cmd)
+{
+ struct if_irda_req *irq = (struct if_irda_req *)rq;
+ struct ksdazzle_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 ksdazzle_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;
+}
+
+/*
+ * Get device stats (for /proc/net/dev and ifconfig)
+ */
+static struct net_device_stats *ksdazzle_net_get_stats(struct net_device
+ *netdev)
+{
+ struct ksdazzle_cb *kingsun = netdev_priv(netdev);
+ return &kingsun->stats;
+}
+
+/*
+ * 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 ksdazzle_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_host_interface *interface;
+ struct usb_endpoint_descriptor *endpoint;
+
+ struct usb_device *dev = interface_to_usbdev(intf);
+ struct ksdazzle_cb *kingsun = NULL;
+ struct net_device *net = NULL;
+ int ret = -ENOMEM;
+ int pipe, maxp_in, maxp_out;
+ __u8 ep_in;
+ __u8 ep_out;
+
+ /* Check that there really are two interrupt endpoints. Check based on the
+ one in drivers/usb/input/usbmouse.c
+ */
+ interface = intf->cur_altsetting;
+ if (interface->desc.bNumEndpoints != 2) {
+ err("ksdazzle: expected 2 endpoints, found %d",
+ interface->desc.bNumEndpoints);
+ return -ENODEV;
+ }
+ endpoint = &interface->endpoint[KINGSUN_EP_IN].desc;
+ if (!usb_endpoint_is_int_in(endpoint)) {
+ err("ksdazzle: endpoint 0 is not interrupt IN");
+ return -ENODEV;
+ }
+
+ ep_in = endpoint->bEndpointAddress;
+ pipe = usb_rcvintpipe(dev, ep_in);
+ maxp_in = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
+ if (maxp_in > 255 || maxp_in <= 1) {
+ err("ksdazzle: endpoint 0 has max packet size %d not in range [2..255]", maxp_in);
+ return -ENODEV;
+ }
+
+ endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc;
+ if (!usb_endpoint_is_int_out(endpoint)) {
+ err("ksdazzle: endpoint 1 is not interrupt OUT");
+ return -ENODEV;
+ }
+
+ ep_out = endpoint->bEndpointAddress;
+ pipe = usb_sndintpipe(dev, ep_out);
+ maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
+
+ /* Allocate network device container. */
+ net = alloc_irdadev(sizeof(*kingsun));
+ if (!net)
+ goto err_out1;
+
+ SET_MODULE_OWNER(net);
+ SET_NETDEV_DEV(net, &intf->dev);
+ kingsun = netdev_priv(net);
+ kingsun->netdev = net;
+ kingsun->usbdev = dev;
+ kingsun->ep_in = ep_in;
+ kingsun->ep_out = ep_out;
+ kingsun->irlap = NULL;
+ kingsun->tx_urb = NULL;
+ kingsun->tx_buf_clear = NULL;
+ kingsun->tx_buf_clear_used = 0;
+ kingsun->tx_buf_clear_sent = 0;
+
+ kingsun->rx_urb = NULL;
+ 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 output buffer */
+ kingsun->tx_buf_clear = kmalloc(KINGSUN_SND_FIFO_SIZE, GFP_KERNEL);
+ if (!kingsun->tx_buf_clear)
+ goto free_mem;
+
+ /* 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 ksdazzle_speedparams));
+
+ printk(KERN_INFO "KingSun/Dazzle 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 speeds
+ with this dongle.
+ */
+ kingsun->qos.baud_rate.bits =
+ IR_2400 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200;
+ kingsun->qos.min_turn_time.bits &= KINGSUN_MTT;
+ irda_qos_bits_to_value(&kingsun->qos);
+
+ /* Override the network functions we need to use */
+ net->hard_start_xmit = ksdazzle_hard_xmit;
+ net->open = ksdazzle_net_open;
+ net->stop = ksdazzle_net_close;
+ net->get_stats = ksdazzle_net_get_stats;
+ net->do_ioctl = ksdazzle_net_ioctl;
+
+ ret = register_netdev(net);
+ if (ret != 0)
+ goto free_mem;
+
+ info("IrDA: Registered KingSun/Dazzle device %s", 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_buf_clear);
+ free_netdev(net);
+ err_out1:
+ return ret;
+}
+
+/*
+ * The current device is removed, the USB layer tell us to shut it down...
+ */
+static void ksdazzle_disconnect(struct usb_interface *intf)
+{
+ struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
+
+ if (!kingsun)
+ return;
+
+ unregister_netdev(kingsun->netdev);
+
+ /* Mop up receive && transmit urb's */
+ usb_kill_urb(kingsun->speed_urb);
+ usb_free_urb(kingsun->speed_urb);
+ kingsun->speed_urb = NULL;
+
+ usb_kill_urb(kingsun->tx_urb);
+ usb_free_urb(kingsun->tx_urb);
+ kingsun->tx_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_buf_clear);
+ free_netdev(kingsun->netdev);
+
+ usb_set_intfdata(intf, NULL);
+}
+
+#ifdef CONFIG_PM
+/* USB suspend, so power off the transmitter/receiver */
+static int ksdazzle_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct ksdazzle_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 ksdazzle_resume(struct usb_interface *intf)
+{
+ struct ksdazzle_cb *kingsun = usb_get_intfdata(intf);
+
+ if (kingsun->rx_urb != NULL) {
+ /* Setup request already filled in ksdazzle_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 = "ksdazzle-sir",
+ .probe = ksdazzle_probe,
+ .disconnect = ksdazzle_disconnect,
+ .id_table = dongles,
+#ifdef CONFIG_PM
+ .suspend = ksdazzle_suspend,
+ .resume = ksdazzle_resume,
+#endif
+};
+
+/*
+ * Module insertion
+ */
+static int __init ksdazzle_init(void)
+{
+ return usb_register(&irda_driver);
+}
+
+module_init(ksdazzle_init);
+
+/*
+ * Module removal
+ */
+static void __exit ksdazzle_cleanup(void)
+{
+ /* Deregister the driver and remove all pending instances */
+ usb_deregister(&irda_driver);
+}
+
+module_exit(ksdazzle_cleanup);
+
+MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>");
+MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun Dazzle");
+MODULE_LICENSE("GPL");
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff