| /***************************************************************************** |
| * |
| * Filename: ksdazzle.c |
| * Version: 0.1.2 |
| * 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/slab.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 */ |
| #define KINGSUN_RCV_MAX 2048 /* Max transfer we can receive */ |
| |
| struct ksdazzle_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 |
| |
| #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 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_buf; |
| 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) |
| dev_err(&urb->dev->dev, |
| "ksdazzle_speed_irq: urb asynchronously failed - %d\n", |
| 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)) { |
| dev_err(&kingsun->usbdev->dev, |
| "ksdazzle_send_irq: Network not running!\n"); |
| return; |
| } |
| |
| /* unlink, shutdown, unplug, other nasties */ |
| if (urb->status != 0) { |
| dev_err(&kingsun->usbdev->dev, |
| "ksdazzle_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 = ksdazzle_submit_tx_fragment(kingsun)) != 0) { |
| dev_err(&kingsun->usbdev->dev, |
| "ksdazzle_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) |
| ksdazzle_change_speed(kingsun, |
| kingsun->new_speed); |
| |
| netif_wake_queue(netdev); |
| } |
| } |
| } |
| |
| /* |
| * Called from net/core when new frame is available. |
| */ |
| static netdev_tx_t ksdazzle_hard_xmit(struct sk_buff *skb, |
| struct net_device *netdev) |
| { |
| struct ksdazzle_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 = ksdazzle_submit_tx_fragment(kingsun)) != 0) { |
| dev_err(&kingsun->usbdev->dev, |
| "ksdazzle_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 ksdazzle_rcv_irq(struct urb *urb) |
| { |
| struct ksdazzle_cb *kingsun = urb->context; |
| struct net_device *netdev = kingsun->netdev; |
| |
| /* in process of stopping, just drop data */ |
| if (!netif_running(netdev)) { |
| kingsun->receiving = 0; |
| return; |
| } |
| |
| /* unlink, shutdown, unplug, other nasties */ |
| if (urb->status != 0) { |
| dev_err(&kingsun->usbdev->dev, |
| "ksdazzle_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++) { |
| async_unwrap_char(netdev, &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 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 = -ENOMEM; |
| dev_err(&kingsun->usbdev->dev, "irlap_open failed\n"); |
| goto free_mem; |
| } |
| |
| /* Start reception. */ |
| usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev, |
| usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in), |
| kingsun->rx_buf, KINGSUN_RCV_MAX, ksdazzle_rcv_irq, |
| kingsun, 1); |
| 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 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; |
| } |
| |
| static const struct net_device_ops ksdazzle_ops = { |
| .ndo_start_xmit = ksdazzle_hard_xmit, |
| .ndo_open = ksdazzle_net_open, |
| .ndo_stop = ksdazzle_net_close, |
| .ndo_do_ioctl = ksdazzle_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 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) { |
| dev_err(&intf->dev, "ksdazzle: expected 2 endpoints, found %d\n", |
| interface->desc.bNumEndpoints); |
| return -ENODEV; |
| } |
| endpoint = &interface->endpoint[KINGSUN_EP_IN].desc; |
| if (!usb_endpoint_is_int_in(endpoint)) { |
| dev_err(&intf->dev, |
| "ksdazzle: endpoint 0 is not interrupt IN\n"); |
| 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) { |
| dev_err(&intf->dev, |
| "ksdazzle: endpoint 0 has max packet size %d not in range [2..255]\n", |
| maxp_in); |
| return -ENODEV; |
| } |
| |
| endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc; |
| if (!usb_endpoint_is_int_out(endpoint)) { |
| dev_err(&intf->dev, |
| "ksdazzle: endpoint 1 is not interrupt OUT\n"); |
| 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_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_buf = 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 input buffer */ |
| kingsun->rx_buf = kmalloc(KINGSUN_RCV_MAX, GFP_KERNEL); |
| if (!kingsun->rx_buf) |
| goto free_mem; |
| |
| /* 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->netdev_ops = &ksdazzle_ops; |
| |
| ret = register_netdev(net); |
| if (ret != 0) |
| goto free_mem; |
| |
| dev_info(&net->dev, "IrDA: Registered KingSun/Dazzle 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_buf_clear); |
| 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 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); |
| 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 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_usb_driver(irda_driver); |
| |
| MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>"); |
| MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun Dazzle"); |
| MODULE_LICENSE("GPL"); |
