diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/bluetooth/bfusb.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/bluetooth/bfusb.c')
-rw-r--r-- | drivers/bluetooth/bfusb.c | 806 |
1 files changed, 806 insertions, 0 deletions
diff --git a/drivers/bluetooth/bfusb.c b/drivers/bluetooth/bfusb.c new file mode 100644 index 000000000000..c42d7e6ac1c5 --- /dev/null +++ b/drivers/bluetooth/bfusb.c @@ -0,0 +1,806 @@ +/* + * + * AVM BlueFRITZ! USB driver + * + * Copyright (C) 2003 Marcel Holtmann <marcel@holtmann.org> + * + * + * 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, or + * (at your option) any later version. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <linux/config.h> +#include <linux/module.h> + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <linux/sched.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> + +#ifndef CONFIG_BT_HCIBFUSB_DEBUG +#undef BT_DBG +#define BT_DBG(D...) +#endif + +#define VERSION "1.1" + +static int ignore = 0; + +static struct usb_driver bfusb_driver; + +static 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 { + 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_scb { + struct urb *urb; +}; + +static void bfusb_tx_complete(struct urb *urb, struct pt_regs *regs); +static void bfusb_rx_complete(struct urb *urb, struct pt_regs *regs); + +static struct urb *bfusb_get_completed(struct bfusb *bfusb) +{ + struct sk_buff *skb; + struct urb *urb = NULL; + + BT_DBG("bfusb %p", bfusb); + + skb = skb_dequeue(&bfusb->completed_q); + if (skb) { + urb = ((struct bfusb_scb *) skb->cb)->urb; + kfree_skb(skb); + } + + return urb; +} + +static void bfusb_unlink_urbs(struct bfusb *bfusb) +{ + struct sk_buff *skb; + struct urb *urb; + + BT_DBG("bfusb %p", bfusb); + + while ((skb = skb_dequeue(&bfusb->pending_q))) { + urb = ((struct bfusb_scb *) skb->cb)->urb; + usb_kill_urb(urb); + skb_queue_tail(&bfusb->completed_q, skb); + } + + while ((urb = bfusb_get_completed(bfusb))) + usb_free_urb(urb); +} + + +static int bfusb_send_bulk(struct bfusb *bfusb, struct sk_buff *skb) +{ + struct bfusb_scb *scb = (void *) skb->cb; + struct urb *urb = bfusb_get_completed(bfusb); + int err, pipe; + + BT_DBG("bfusb %p skb %p len %d", bfusb, skb, skb->len); + + if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC))) + return -ENOMEM; + + pipe = usb_sndbulkpipe(bfusb->udev, bfusb->bulk_out_ep); + + usb_fill_bulk_urb(urb, bfusb->udev, pipe, skb->data, skb->len, + bfusb_tx_complete, skb); + + scb->urb = urb; + + skb_queue_tail(&bfusb->pending_q, skb); + + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err) { + BT_ERR("%s bulk tx submit failed urb %p err %d", + bfusb->hdev->name, urb, err); + skb_unlink(skb); + usb_free_urb(urb); + } else + atomic_inc(&bfusb->pending_tx); + + return err; +} + +static void bfusb_tx_wakeup(struct bfusb *bfusb) +{ + struct sk_buff *skb; + + BT_DBG("bfusb %p", bfusb); + + if (test_and_set_bit(BFUSB_TX_PROCESS, &bfusb->state)) { + set_bit(BFUSB_TX_WAKEUP, &bfusb->state); + return; + } + + do { + clear_bit(BFUSB_TX_WAKEUP, &bfusb->state); + + while ((atomic_read(&bfusb->pending_tx) < BFUSB_MAX_BULK_TX) && + (skb = skb_dequeue(&bfusb->transmit_q))) { + if (bfusb_send_bulk(bfusb, skb) < 0) { + skb_queue_head(&bfusb->transmit_q, skb); + break; + } + } + + } while (test_bit(BFUSB_TX_WAKEUP, &bfusb->state)); + + clear_bit(BFUSB_TX_PROCESS, &bfusb->state); +} + +static void bfusb_tx_complete(struct urb *urb, struct pt_regs *regs) +{ + struct sk_buff *skb = (struct sk_buff *) urb->context; + struct bfusb *bfusb = (struct bfusb *) skb->dev; + + BT_DBG("bfusb %p urb %p skb %p len %d", bfusb, urb, skb, skb->len); + + atomic_dec(&bfusb->pending_tx); + + if (!test_bit(HCI_RUNNING, &bfusb->hdev->flags)) + return; + + if (!urb->status) + bfusb->hdev->stat.byte_tx += skb->len; + else + bfusb->hdev->stat.err_tx++; + + read_lock(&bfusb->lock); + + skb_unlink(skb); + skb_queue_tail(&bfusb->completed_q, skb); + + bfusb_tx_wakeup(bfusb); + + read_unlock(&bfusb->lock); +} + + +static int bfusb_rx_submit(struct bfusb *bfusb, struct urb *urb) +{ + struct bfusb_scb *scb; + struct sk_buff *skb; + int err, pipe, size = HCI_MAX_FRAME_SIZE + 32; + + BT_DBG("bfusb %p urb %p", bfusb, urb); + + if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC))) + return -ENOMEM; + + if (!(skb = bt_skb_alloc(size, GFP_ATOMIC))) { + usb_free_urb(urb); + return -ENOMEM; + } + + skb->dev = (void *) bfusb; + + scb = (struct bfusb_scb *) skb->cb; + scb->urb = urb; + + pipe = usb_rcvbulkpipe(bfusb->udev, bfusb->bulk_in_ep); + + usb_fill_bulk_urb(urb, bfusb->udev, pipe, skb->data, size, + bfusb_rx_complete, skb); + + skb_queue_tail(&bfusb->pending_q, skb); + + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err) { + BT_ERR("%s bulk rx submit failed urb %p err %d", + bfusb->hdev->name, urb, err); + skb_unlink(skb); + kfree_skb(skb); + usb_free_urb(urb); + } + + return err; +} + +static inline int bfusb_recv_block(struct bfusb *bfusb, int hdr, unsigned char *data, int len) +{ + BT_DBG("bfusb %p hdr 0x%02x data %p len %d", bfusb, hdr, data, len); + + if (hdr & 0x10) { + BT_ERR("%s error in block", bfusb->hdev->name); + if (bfusb->reassembly) + kfree_skb(bfusb->reassembly); + bfusb->reassembly = NULL; + return -EIO; + } + + if (hdr & 0x04) { + struct sk_buff *skb; + unsigned char pkt_type; + int pkt_len = 0; + + if (bfusb->reassembly) { + BT_ERR("%s unexpected start block", bfusb->hdev->name); + kfree_skb(bfusb->reassembly); + bfusb->reassembly = NULL; + } + + if (len < 1) { + BT_ERR("%s no packet type found", bfusb->hdev->name); + return -EPROTO; + } + + pkt_type = *data++; len--; + + switch (pkt_type) { + case HCI_EVENT_PKT: + if (len >= HCI_EVENT_HDR_SIZE) { + struct hci_event_hdr *hdr = (struct hci_event_hdr *) data; + pkt_len = HCI_EVENT_HDR_SIZE + hdr->plen; + } else { + BT_ERR("%s event block is too short", bfusb->hdev->name); + return -EILSEQ; + } + break; + + case HCI_ACLDATA_PKT: + if (len >= HCI_ACL_HDR_SIZE) { + struct hci_acl_hdr *hdr = (struct hci_acl_hdr *) data; + pkt_len = HCI_ACL_HDR_SIZE + __le16_to_cpu(hdr->dlen); + } else { + BT_ERR("%s data block is too short", bfusb->hdev->name); + return -EILSEQ; + } + break; + + case HCI_SCODATA_PKT: + if (len >= HCI_SCO_HDR_SIZE) { + struct hci_sco_hdr *hdr = (struct hci_sco_hdr *) data; + pkt_len = HCI_SCO_HDR_SIZE + hdr->dlen; + } else { + BT_ERR("%s audio block is too short", bfusb->hdev->name); + return -EILSEQ; + } + break; + } + + skb = bt_skb_alloc(pkt_len, GFP_ATOMIC); + if (!skb) { + BT_ERR("%s no memory for the packet", bfusb->hdev->name); + return -ENOMEM; + } + + skb->dev = (void *) bfusb->hdev; + skb->pkt_type = pkt_type; + + bfusb->reassembly = skb; + } else { + if (!bfusb->reassembly) { + BT_ERR("%s unexpected continuation block", bfusb->hdev->name); + return -EIO; + } + } + + if (len > 0) + memcpy(skb_put(bfusb->reassembly, len), data, len); + + if (hdr & 0x08) { + hci_recv_frame(bfusb->reassembly); + bfusb->reassembly = NULL; + } + + return 0; +} + +static void bfusb_rx_complete(struct urb *urb, struct pt_regs *regs) +{ + struct sk_buff *skb = (struct sk_buff *) urb->context; + struct bfusb *bfusb = (struct bfusb *) 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", bfusb, urb, skb, skb->len); + + read_lock(&bfusb->lock); + + if (!test_bit(HCI_RUNNING, &bfusb->hdev->flags)) + goto unlock; + + if (urb->status || !count) + goto resubmit; + + bfusb->hdev->stat.byte_rx += count; + + skb_put(skb, count); + + while (count) { + hdr = buf[0] | (buf[1] << 8); + + if (hdr & 0x4000) { + len = 0; + count -= 2; + buf += 2; + } else { + len = (buf[2] == 0) ? 256 : buf[2]; + count -= 3; + buf += 3; + } + + if (count < len) { + BT_ERR("%s block extends over URB buffer ranges", + bfusb->hdev->name); + } + + if ((hdr & 0xe1) == 0xc1) + bfusb_recv_block(bfusb, hdr, buf, len); + + count -= len; + buf += len; + } + + skb_unlink(skb); + kfree_skb(skb); + + bfusb_rx_submit(bfusb, urb); + + read_unlock(&bfusb->lock); + + return; + +resubmit: + urb->dev = bfusb->udev; + + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err) { + BT_ERR("%s bulk resubmit failed urb %p err %d", + bfusb->hdev->name, urb, err); + } + +unlock: + read_unlock(&bfusb->lock); +} + + +static int bfusb_open(struct hci_dev *hdev) +{ + struct bfusb *bfusb = (struct bfusb *) hdev->driver_data; + unsigned long flags; + int i, err; + + BT_DBG("hdev %p bfusb %p", hdev, bfusb); + + if (test_and_set_bit(HCI_RUNNING, &hdev->flags)) + return 0; + + write_lock_irqsave(&bfusb->lock, flags); + + err = bfusb_rx_submit(bfusb, NULL); + if (!err) { + for (i = 1; i < BFUSB_MAX_BULK_RX; i++) + bfusb_rx_submit(bfusb, NULL); + } else { + clear_bit(HCI_RUNNING, &hdev->flags); + } + + write_unlock_irqrestore(&bfusb->lock, flags); + + return err; +} + +static int bfusb_flush(struct hci_dev *hdev) +{ + struct bfusb *bfusb = (struct bfusb *) hdev->driver_data; + + BT_DBG("hdev %p bfusb %p", hdev, bfusb); + + skb_queue_purge(&bfusb->transmit_q); + + return 0; +} + +static int bfusb_close(struct hci_dev *hdev) +{ + struct bfusb *bfusb = (struct bfusb *) hdev->driver_data; + unsigned long flags; + + BT_DBG("hdev %p bfusb %p", hdev, bfusb); + + if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) + return 0; + + write_lock_irqsave(&bfusb->lock, flags); + write_unlock_irqrestore(&bfusb->lock, flags); + + bfusb_unlink_urbs(bfusb); + bfusb_flush(hdev); + + return 0; +} + +static int bfusb_send_frame(struct sk_buff *skb) +{ + struct hci_dev *hdev = (struct hci_dev *) skb->dev; + struct bfusb *bfusb; + 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, skb->pkt_type, skb->len); + + if (!hdev) { + BT_ERR("Frame for unknown HCI device (hdev=NULL)"); + return -ENODEV; + } + + if (!test_bit(HCI_RUNNING, &hdev->flags)) + return -EBUSY; + + bfusb = (struct bfusb *) hdev->driver_data; + + switch (skb->pkt_type) { + 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), &(skb->pkt_type), 1); + + count = skb->len; + + /* Max HCI frame size seems to be 1511 + 1 */ + if (!(nskb = bt_skb_alloc(count + 32, GFP_ATOMIC))) { + BT_ERR("Can't allocate memory for new packet"); + return -ENOMEM; + } + + nskb->dev = (void *) bfusb; + + 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; + + memcpy(skb_put(nskb, 3), buf, 3); + memcpy(skb_put(nskb, size), skb->data + sent, size); + + sent += size; + count -= size; + } + + /* Don't send frame with multiple size of bulk max packet */ + if ((nskb->len % bfusb->bulk_pkt_size) == 0) { + buf[0] = 0xdd; + buf[1] = 0x00; + memcpy(skb_put(nskb, 2), buf, 2); + } + + read_lock(&bfusb->lock); + + skb_queue_tail(&bfusb->transmit_q, nskb); + bfusb_tx_wakeup(bfusb); + + read_unlock(&bfusb->lock); + + kfree_skb(skb); + + return 0; +} + +static void bfusb_destruct(struct hci_dev *hdev) +{ + struct bfusb *bfusb = (struct bfusb *) hdev->driver_data; + + BT_DBG("hdev %p bfusb %p", hdev, bfusb); + + kfree(bfusb); +} + +static int bfusb_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg) +{ + return -ENOIOCTLCMD; +} + + +static int bfusb_load_firmware(struct bfusb *bfusb, unsigned char *firmware, int count) +{ + unsigned char *buf; + int err, pipe, len, size, sent = 0; + + BT_DBG("bfusb %p udev %p", bfusb, bfusb->udev); + + BT_INFO("BlueFRITZ! USB loading firmware"); + + pipe = usb_sndctrlpipe(bfusb->udev, 0); + + if (usb_control_msg(bfusb->udev, pipe, USB_REQ_SET_CONFIGURATION, + 0, 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT) < 0) { + BT_ERR("Can't change to loading configuration"); + return -EBUSY; + } + + bfusb->udev->toggle[0] = bfusb->udev->toggle[1] = 0; + + buf = kmalloc(BFUSB_MAX_BLOCK_SIZE + 3, GFP_ATOMIC); + if (!buf) { + BT_ERR("Can't allocate memory chunk for firmware"); + return -ENOMEM; + } + + pipe = usb_sndbulkpipe(bfusb->udev, bfusb->bulk_out_ep); + + while (count) { + size = min_t(uint, count, BFUSB_MAX_BLOCK_SIZE + 3); + + memcpy(buf, firmware + sent, size); + + err = usb_bulk_msg(bfusb->udev, pipe, buf, size, + &len, BFUSB_BLOCK_TIMEOUT); + + if (err || (len != size)) { + BT_ERR("Error in firmware loading"); + goto error; + } + + sent += size; + count -= size; + } + + if ((err = usb_bulk_msg(bfusb->udev, pipe, NULL, 0, + &len, BFUSB_BLOCK_TIMEOUT)) < 0) { + BT_ERR("Error in null packet request"); + goto error; + } + + pipe = usb_sndctrlpipe(bfusb->udev, 0); + + if ((err = usb_control_msg(bfusb->udev, pipe, USB_REQ_SET_CONFIGURATION, + 0, 2, 0, NULL, 0, USB_CTRL_SET_TIMEOUT)) < 0) { + BT_ERR("Can't change to running configuration"); + goto error; + } + + bfusb->udev->toggle[0] = bfusb->udev->toggle[1] = 0; + + BT_INFO("BlueFRITZ! USB device ready"); + + kfree(buf); + return 0; + +error: + kfree(buf); + + pipe = usb_sndctrlpipe(bfusb->udev, 0); + + usb_control_msg(bfusb->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 *bfusb; + + BT_DBG("intf %p id %p", intf, id); + + if (ignore) + return -ENODEV; + + /* 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 */ + if (!(bfusb = kmalloc(sizeof(struct bfusb), GFP_KERNEL))) { + BT_ERR("Can't allocate memory for control structure"); + goto done; + } + + memset(bfusb, 0, sizeof(struct bfusb)); + + bfusb->udev = udev; + bfusb->bulk_in_ep = bulk_in_ep->desc.bEndpointAddress; + bfusb->bulk_out_ep = bulk_out_ep->desc.bEndpointAddress; + bfusb->bulk_pkt_size = le16_to_cpu(bulk_out_ep->desc.wMaxPacketSize); + + rwlock_init(&bfusb->lock); + + bfusb->reassembly = NULL; + + skb_queue_head_init(&bfusb->transmit_q); + skb_queue_head_init(&bfusb->pending_q); + skb_queue_head_init(&bfusb->completed_q); + + if (request_firmware(&firmware, "bfubase.frm", &udev->dev) < 0) { + BT_ERR("Firmware request failed"); + goto error; + } + + BT_DBG("firmware data %p size %d", firmware->data, firmware->size); + + if (bfusb_load_firmware(bfusb, 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 error; + } + + bfusb->hdev = hdev; + + hdev->type = HCI_USB; + hdev->driver_data = bfusb; + SET_HCIDEV_DEV(hdev, &intf->dev); + + hdev->open = bfusb_open; + hdev->close = bfusb_close; + hdev->flush = bfusb_flush; + hdev->send = bfusb_send_frame; + hdev->destruct = bfusb_destruct; + hdev->ioctl = bfusb_ioctl; + + hdev->owner = THIS_MODULE; + + if (hci_register_dev(hdev) < 0) { + BT_ERR("Can't register HCI device"); + hci_free_dev(hdev); + goto error; + } + + usb_set_intfdata(intf, bfusb); + + return 0; + +release: + release_firmware(firmware); + +error: + kfree(bfusb); + +done: + return -EIO; +} + +static void bfusb_disconnect(struct usb_interface *intf) +{ + struct bfusb *bfusb = usb_get_intfdata(intf); + struct hci_dev *hdev = bfusb->hdev; + + BT_DBG("intf %p", intf); + + if (!hdev) + return; + + usb_set_intfdata(intf, NULL); + + bfusb_close(hdev); + + if (hci_unregister_dev(hdev) < 0) + BT_ERR("Can't unregister HCI device %s", hdev->name); + + hci_free_dev(hdev); +} + +static struct usb_driver bfusb_driver = { + .owner = THIS_MODULE, + .name = "bfusb", + .probe = bfusb_probe, + .disconnect = bfusb_disconnect, + .id_table = bfusb_table, +}; + +static int __init bfusb_init(void) +{ + int err; + + BT_INFO("BlueFRITZ! USB driver ver %s", VERSION); + + if ((err = usb_register(&bfusb_driver)) < 0) + BT_ERR("Failed to register BlueFRITZ! USB driver"); + + return err; +} + +static void __exit bfusb_exit(void) +{ + usb_deregister(&bfusb_driver); +} + +module_init(bfusb_init); +module_exit(bfusb_exit); + +module_param(ignore, bool, 0644); +MODULE_PARM_DESC(ignore, "Ignore devices from the matching table"); + +MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); +MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION); +MODULE_VERSION(VERSION); +MODULE_LICENSE("GPL"); |