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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#include <linux/module.h>
#include <linux/kernel.h>#include <linux/init.h>#include <linux/slab.h>#include <linux/types.h>#include <linux/errno.h>#include <linux/skbuff.h>
#include <linux/device.h>#include <linux/firmware.h>
#include <linux/usb.h>
#include <net/bluetooth/bluetooth.h>#include <net/bluetooth/hci_core.h>
#define VERSION "1.2"
static struct usb_driver bfusb_driver;
static const struct usb_device_id bfusb_table[] = { /* AVM BlueFRITZ! USB */ { USB_DEVICE(0x057c, 0x2200) },
{ } /* Terminating entry */};
MODULE_DEVICE_TABLE(usb, bfusb_table);
#define BFUSB_MAX_BLOCK_SIZE 256
#define BFUSB_BLOCK_TIMEOUT 3000
#define BFUSB_TX_PROCESS 1#define BFUSB_TX_WAKEUP 2
#define BFUSB_MAX_BULK_TX 2#define BFUSB_MAX_BULK_RX 2
struct bfusb_data { struct hci_dev *hdev;
unsigned long state;
struct usb_device *udev;
unsigned int bulk_in_ep; unsigned int bulk_out_ep; unsigned int bulk_pkt_size;
rwlock_t lock;
struct sk_buff_head transmit_q;
struct sk_buff *reassembly;
atomic_t pending_tx; struct sk_buff_head pending_q; struct sk_buff_head completed_q;};
struct bfusb_data_scb { struct urb *urb;};
static void bfusb_tx_complete(struct urb *urb);static void bfusb_rx_complete(struct urb *urb);
static struct urb *bfusb_get_completed(struct bfusb_data *data){ struct sk_buff *skb; struct urb *urb = NULL;
BT_DBG("bfusb %p", data);
skb = skb_dequeue(&data->completed_q); if (skb) { urb = ((struct bfusb_data_scb *) skb->cb)->urb; kfree_skb(skb); }
return urb;}
static void bfusb_unlink_urbs(struct bfusb_data *data){ struct sk_buff *skb; struct urb *urb;
BT_DBG("bfusb %p", data);
while ((skb = skb_dequeue(&data->pending_q))) { urb = ((struct bfusb_data_scb *) skb->cb)->urb; usb_kill_urb(urb); skb_queue_tail(&data->completed_q, skb); }
while ((urb = bfusb_get_completed(data))) usb_free_urb(urb);}
static int bfusb_send_bulk(struct bfusb_data *data, struct sk_buff *skb){ struct bfusb_data_scb *scb = (void *) skb->cb; struct urb *urb = bfusb_get_completed(data); int err, pipe;
BT_DBG("bfusb %p skb %p len %d", data, skb, skb->len);
if (!urb) { urb = usb_alloc_urb(0, GFP_ATOMIC); if (!urb) return -ENOMEM; }
pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, skb->len, bfusb_tx_complete, skb);
scb->urb = urb;
skb_queue_tail(&data->pending_q, skb);
err = usb_submit_urb(urb, GFP_ATOMIC); if (err) { bt_dev_err(data->hdev, "bulk tx submit failed urb %p err %d", urb, err); skb_unlink(skb, &data->pending_q); usb_free_urb(urb); } else atomic_inc(&data->pending_tx);
return err;}
static void bfusb_tx_wakeup(struct bfusb_data *data){ struct sk_buff *skb;
BT_DBG("bfusb %p", data);
if (test_and_set_bit(BFUSB_TX_PROCESS, &data->state)) { set_bit(BFUSB_TX_WAKEUP, &data->state); return; }
do { clear_bit(BFUSB_TX_WAKEUP, &data->state);
while ((atomic_read(&data->pending_tx) < BFUSB_MAX_BULK_TX) && (skb = skb_dequeue(&data->transmit_q))) { if (bfusb_send_bulk(data, skb) < 0) { skb_queue_head(&data->transmit_q, skb); break; } }
} while (test_bit(BFUSB_TX_WAKEUP, &data->state));
clear_bit(BFUSB_TX_PROCESS, &data->state);}
static void bfusb_tx_complete(struct urb *urb){ struct sk_buff *skb = (struct sk_buff *) urb->context; struct bfusb_data *data = (struct bfusb_data *) skb->dev;
BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
atomic_dec(&data->pending_tx);
if (!test_bit(HCI_RUNNING, &data->hdev->flags)) return;
if (!urb->status) data->hdev->stat.byte_tx += skb->len; else data->hdev->stat.err_tx++;
read_lock(&data->lock);
skb_unlink(skb, &data->pending_q); skb_queue_tail(&data->completed_q, skb);
bfusb_tx_wakeup(data);
read_unlock(&data->lock);}
static int bfusb_rx_submit(struct bfusb_data *data, struct urb *urb){ struct bfusb_data_scb *scb; struct sk_buff *skb; int err, pipe, size = HCI_MAX_FRAME_SIZE + 32;
BT_DBG("bfusb %p urb %p", data, urb);
if (!urb) { urb = usb_alloc_urb(0, GFP_ATOMIC); if (!urb) return -ENOMEM; }
skb = bt_skb_alloc(size, GFP_ATOMIC); if (!skb) { usb_free_urb(urb); return -ENOMEM; }
skb->dev = (void *) data;
scb = (struct bfusb_data_scb *) skb->cb; scb->urb = urb;
pipe = usb_rcvbulkpipe(data->udev, data->bulk_in_ep);
usb_fill_bulk_urb(urb, data->udev, pipe, skb->data, size, bfusb_rx_complete, skb);
skb_queue_tail(&data->pending_q, skb);
err = usb_submit_urb(urb, GFP_ATOMIC); if (err) { bt_dev_err(data->hdev, "bulk rx submit failed urb %p err %d", urb, err); skb_unlink(skb, &data->pending_q); kfree_skb(skb); usb_free_urb(urb); }
return err;}
static inline int bfusb_recv_block(struct bfusb_data *data, int hdr, unsigned char *buf, int len){ BT_DBG("bfusb %p hdr 0x%02x data %p len %d", data, hdr, buf, len);
if (hdr & 0x10) { bt_dev_err(data->hdev, "error in block"); kfree_skb(data->reassembly); data->reassembly = NULL; return -EIO; }
if (hdr & 0x04) { struct sk_buff *skb; unsigned char pkt_type; int pkt_len = 0;
if (data->reassembly) { bt_dev_err(data->hdev, "unexpected start block"); kfree_skb(data->reassembly); data->reassembly = NULL; }
if (len < 1) { bt_dev_err(data->hdev, "no packet type found"); return -EPROTO; }
pkt_type = *buf++; len--;
switch (pkt_type) { case HCI_EVENT_PKT: if (len >= HCI_EVENT_HDR_SIZE) { struct hci_event_hdr *hdr = (struct hci_event_hdr *) buf; pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen; } else { bt_dev_err(data->hdev, "event block is too short"); return -EILSEQ; } break;
case HCI_ACLDATA_PKT: if (len >= HCI_ACL_HDR_SIZE) { struct hci_acl_hdr *hdr = (struct hci_acl_hdr *) buf; pkt_len = HCI_ACL_HDR_SIZE + __le16_to_cpu(hdr->dlen); } else { bt_dev_err(data->hdev, "data block is too short"); return -EILSEQ; } break;
case HCI_SCODATA_PKT: if (len >= HCI_SCO_HDR_SIZE) { struct hci_sco_hdr *hdr = (struct hci_sco_hdr *) buf; pkt_len = HCI_SCO_HDR_SIZE + hdr->dlen; } else { bt_dev_err(data->hdev, "audio block is too short"); return -EILSEQ; } break;
default: bt_dev_err(data->hdev, "unknown packet type 0x%02x", pkt_type); return -EILSEQ; }
skb = bt_skb_alloc(pkt_len, GFP_ATOMIC); if (!skb) { bt_dev_err(data->hdev, "no memory for the packet"); return -ENOMEM; }
hci_skb_pkt_type(skb) = pkt_type;
data->reassembly = skb; } else { if (!data->reassembly) { bt_dev_err(data->hdev, "unexpected continuation block"); return -EIO; } }
if (len > skb_tailroom(data->reassembly)) { bt_dev_err(data->hdev, "block exceeds packet length"); kfree_skb(data->reassembly); data->reassembly = NULL; return -EILSEQ; }
if (len > 0) skb_put_data(data->reassembly, buf, len);
if (hdr & 0x08) { hci_recv_frame(data->hdev, data->reassembly); data->reassembly = NULL; }
return 0;}
static void bfusb_rx_complete(struct urb *urb){ struct sk_buff *skb = (struct sk_buff *) urb->context; struct bfusb_data *data = (struct bfusb_data *) skb->dev; unsigned char *buf = urb->transfer_buffer; int count = urb->actual_length; int err, hdr, len;
BT_DBG("bfusb %p urb %p skb %p len %d", data, urb, skb, skb->len);
read_lock(&data->lock);
if (!test_bit(HCI_RUNNING, &data->hdev->flags)) goto unlock;
if (urb->status || !count) goto resubmit;
data->hdev->stat.byte_rx += count;
skb_put(skb, count);
while (count) { if (count < 2) { bt_dev_err(data->hdev, "short block header"); kfree_skb(data->reassembly); data->reassembly = NULL; break; }
hdr = buf[0] | (buf[1] << 8);
if (hdr & 0x4000) { len = 0; count -= 2; buf += 2; } else { if (count < 3) { bt_dev_err(data->hdev, "short block header"); kfree_skb(data->reassembly); data->reassembly = NULL; break; }
len = (buf[2] == 0) ? 256 : buf[2]; count -= 3; buf += 3; }
if (count < len) { bt_dev_err(data->hdev, "block extends over URB buffer ranges"); kfree_skb(data->reassembly); data->reassembly = NULL; break; }
if ((hdr & 0xe1) == 0xc1 && bfusb_recv_block(data, hdr, buf, len) < 0) data->hdev->stat.err_rx++;
count -= len; buf += len; }
skb_unlink(skb, &data->pending_q); kfree_skb(skb);
bfusb_rx_submit(data, urb);
read_unlock(&data->lock);
return;
resubmit: urb->dev = data->udev;
err = usb_submit_urb(urb, GFP_ATOMIC); if (err) { bt_dev_err(data->hdev, "bulk resubmit failed urb %p err %d", urb, err); }
unlock: read_unlock(&data->lock);}
static int bfusb_open(struct hci_dev *hdev){ struct bfusb_data *data = hci_get_drvdata(hdev); unsigned long flags; int i, err;
BT_DBG("hdev %p bfusb %p", hdev, data);
write_lock_irqsave(&data->lock, flags);
err = bfusb_rx_submit(data, NULL); if (!err) { for (i = 1; i < BFUSB_MAX_BULK_RX; i++) bfusb_rx_submit(data, NULL); }
write_unlock_irqrestore(&data->lock, flags);
return err;}
static int bfusb_flush(struct hci_dev *hdev){ struct bfusb_data *data = hci_get_drvdata(hdev);
BT_DBG("hdev %p bfusb %p", hdev, data);
skb_queue_purge(&data->transmit_q);
return 0;}
static int bfusb_close(struct hci_dev *hdev){ struct bfusb_data *data = hci_get_drvdata(hdev); unsigned long flags;
BT_DBG("hdev %p bfusb %p", hdev, data);
write_lock_irqsave(&data->lock, flags); write_unlock_irqrestore(&data->lock, flags);
bfusb_unlink_urbs(data); bfusb_flush(hdev);
return 0;}
static int bfusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb){ struct bfusb_data *data = hci_get_drvdata(hdev); struct sk_buff *nskb; unsigned char buf[3]; int sent = 0, size, count;
BT_DBG("hdev %p skb %p type %d len %d", hdev, skb, hci_skb_pkt_type(skb), skb->len);
switch (hci_skb_pkt_type(skb)) { case HCI_COMMAND_PKT: hdev->stat.cmd_tx++; break; case HCI_ACLDATA_PKT: hdev->stat.acl_tx++; break; case HCI_SCODATA_PKT: hdev->stat.sco_tx++; break; }
/* Prepend skb with frame type */ memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
count = skb->len;
/* Max HCI frame size seems to be 1511 + 1 */ nskb = bt_skb_alloc(count + 32, GFP_KERNEL); if (!nskb) { bt_dev_err(hdev, "Can't allocate memory for new packet"); return -ENOMEM; }
nskb->dev = (void *) data;
while (count) { size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE);
buf[0] = 0xc1 | ((sent == 0) ? 0x04 : 0) | ((count == size) ? 0x08 : 0); buf[1] = 0x00; buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;
skb_put_data(nskb, buf, 3); skb_copy_from_linear_data_offset(skb, sent, skb_put(nskb, size), size);
sent += size; count -= size; }
/* Don't send frame with multiple size of bulk max packet */ if ((nskb->len % data->bulk_pkt_size) == 0) { buf[0] = 0xdd; buf[1] = 0x00; skb_put_data(nskb, buf, 2); }
read_lock(&data->lock);
skb_queue_tail(&data->transmit_q, nskb); bfusb_tx_wakeup(data);
read_unlock(&data->lock);
kfree_skb(skb);
return 0;}
static int bfusb_load_firmware(struct bfusb_data *data, const unsigned char *firmware, int count){ unsigned char *buf; int err, pipe, len, size, sent = 0;
BT_DBG("bfusb %p udev %p", data, data->udev);
BT_INFO("BlueFRITZ! USB loading firmware");
buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_KERNEL); if (!buf) { BT_ERR("Can't allocate memory chunk for firmware"); return -ENOMEM; }
pipe = usb_sndctrlpipe(data->udev, 0);
if (usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION, 0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) { BT_ERR("Can't change to loading configuration"); kfree(buf); return -EBUSY; }
data->udev->toggle[0] = data->udev->toggle[1] = 0;
pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
while (count) { size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3);
memcpy(buf, firmware + sent, size);
err = usb_bulk_msg(data->udev, pipe, buf, size, &len, BFUSB_BLOCK_TIMEOUT);
if (err || (len != size)) { BT_ERR("Error in firmware loading"); goto error; }
sent += size; count -= size; }
err = usb_bulk_msg(data->udev, pipe, NULL, 0, &len, BFUSB_BLOCK_TIMEOUT); if (err < 0) { BT_ERR("Error in null packet request"); goto error; }
pipe = usb_sndctrlpipe(data->udev, 0);
err = usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION, 0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); if (err < 0) { BT_ERR("Can't change to running configuration"); goto error; }
data->udev->toggle[0] = data->udev->toggle[1] = 0;
BT_INFO("BlueFRITZ! USB device ready");
kfree(buf); return 0;
error: kfree(buf);
pipe = usb_sndctrlpipe(data->udev, 0);
usb_control_msg(data->udev, pipe, USB_REQ_SET_CONFIGURATION, 0, 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
return err;}
static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *id){ const struct firmware *firmware; struct usb_device *udev = interface_to_usbdev(intf); struct usb_host_endpoint *bulk_out_ep; struct usb_host_endpoint *bulk_in_ep; struct hci_dev *hdev; struct bfusb_data *data;
BT_DBG("intf %p id %p", intf, id);
/* Check number of endpoints */ if (intf->cur_altsetting->desc.bNumEndpoints < 2) return -EIO;
bulk_out_ep = &intf->cur_altsetting->endpoint[0]; bulk_in_ep = &intf->cur_altsetting->endpoint[1];
if (!bulk_out_ep || !bulk_in_ep) { BT_ERR("Bulk endpoints not found"); goto done; }
/* Initialize control structure and load firmware */ data = devm_kzalloc(&intf->dev, sizeof(struct bfusb_data), GFP_KERNEL); if (!data) return -ENOMEM;
data->udev = udev; data->bulk_in_ep = bulk_in_ep->desc.bEndpointAddress; data->bulk_out_ep = bulk_out_ep->desc.bEndpointAddress; data->bulk_pkt_size = le16_to_cpu(bulk_out_ep->desc.wMaxPacketSize);
if (!data->bulk_pkt_size) goto done;
rwlock_init(&data->lock);
data->reassembly = NULL;
skb_queue_head_init(&data->transmit_q); skb_queue_head_init(&data->pending_q); skb_queue_head_init(&data->completed_q);
if (request_firmware(&firmware, "bfubase.frm", &udev->dev) < 0) { BT_ERR("Firmware request failed"); goto done; }
BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
if (bfusb_load_firmware(data, firmware->data, firmware->size) < 0) { BT_ERR("Firmware loading failed"); goto release; }
release_firmware(firmware);
/* Initialize and register HCI device */ hdev = hci_alloc_dev(); if (!hdev) { BT_ERR("Can't allocate HCI device"); goto done; }
data->hdev = hdev;
hdev->bus = HCI_USB; hci_set_drvdata(hdev, data); SET_HCIDEV_DEV(hdev, &intf->dev);
hdev->open = bfusb_open; hdev->close = bfusb_close; hdev->flush = bfusb_flush; hdev->send = bfusb_send_frame;
hci_set_quirk(hdev, HCI_QUIRK_BROKEN_LOCAL_COMMANDS);
if (hci_register_dev(hdev) < 0) { BT_ERR("Can't register HCI device"); hci_free_dev(hdev); goto done; }
usb_set_intfdata(intf, data);
return 0;
release: release_firmware(firmware);
done: return -EIO;}
static void bfusb_disconnect(struct usb_interface *intf){ struct bfusb_data *data = usb_get_intfdata(intf); struct hci_dev *hdev = data->hdev;
BT_DBG("intf %p", intf);
if (!hdev) return;
usb_set_intfdata(intf, NULL);
bfusb_close(hdev);
hci_unregister_dev(hdev); hci_free_dev(hdev);}
static struct usb_driver bfusb_driver = { .name = "bfusb", .probe = bfusb_probe, .disconnect = bfusb_disconnect, .id_table = bfusb_table, .disable_hub_initiated_lpm = 1,};
module_usb_driver(bfusb_driver);
MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION);MODULE_VERSION(VERSION);MODULE_LICENSE("GPL");MODULE_FIRMWARE("bfubase.frm");