From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/bluetooth/bfusb.c | 750 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 750 insertions(+) create mode 100644 kernel/drivers/bluetooth/bfusb.c (limited to 'kernel/drivers/bluetooth/bfusb.c') diff --git a/kernel/drivers/bluetooth/bfusb.c b/kernel/drivers/bluetooth/bfusb.c new file mode 100644 index 000000000..fcfb72e9e --- /dev/null +++ b/kernel/drivers/bluetooth/bfusb.c @@ -0,0 +1,750 @@ +/* + * + * AVM BlueFRITZ! USB driver + * + * Copyright (C) 2003-2006 Marcel Holtmann + * + * + * 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 + +#include +#include +#include +#include +#include +#include + +#include +#include + +#include + +#include +#include + +#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_ERR("%s bulk tx submit failed urb %p err %d", + data->hdev->name, 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_ERR("%s bulk rx submit failed urb %p err %d", + data->hdev->name, 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_ERR("%s error in block", data->hdev->name); + 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_ERR("%s unexpected start block", data->hdev->name); + kfree_skb(data->reassembly); + data->reassembly = NULL; + } + + if (len < 1) { + BT_ERR("%s no packet type found", data->hdev->name); + 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_ERR("%s event block is too short", data->hdev->name); + 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_ERR("%s data block is too short", data->hdev->name); + 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_ERR("%s audio block is too short", data->hdev->name); + return -EILSEQ; + } + break; + } + + skb = bt_skb_alloc(pkt_len, GFP_ATOMIC); + if (!skb) { + BT_ERR("%s no memory for the packet", data->hdev->name); + return -ENOMEM; + } + + bt_cb(skb)->pkt_type = pkt_type; + + data->reassembly = skb; + } else { + if (!data->reassembly) { + BT_ERR("%s unexpected continuation block", data->hdev->name); + return -EIO; + } + } + + if (len > 0) + memcpy(skb_put(data->reassembly, len), 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) { + 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", + data->hdev->name); + } + + if ((hdr & 0xe1) == 0xc1) + bfusb_recv_block(data, hdr, buf, len); + + 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_ERR("%s bulk resubmit failed urb %p err %d", + data->hdev->name, 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); + + if (test_and_set_bit(HCI_RUNNING, &hdev->flags)) + return 0; + + 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); + } else { + clear_bit(HCI_RUNNING, &hdev->flags); + } + + 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); + + if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) + return 0; + + 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, bt_cb(skb)->pkt_type, skb->len); + + if (!test_bit(HCI_RUNNING, &hdev->flags)) + return -EBUSY; + + switch (bt_cb(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), &bt_cb(skb)->pkt_type, 1); + + count = skb->len; + + /* Max HCI frame size seems to be 1511 + 1 */ + nskb = bt_skb_alloc(count + 32, GFP_ATOMIC); + if (!nskb) { + BT_ERR("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; + + memcpy(skb_put(nskb, 3), 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; + memcpy(skb_put(nskb, 2), 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) { + BT_ERR("Can't allocate memory for control structure"); + goto done; + } + + 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); + + 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; + + set_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks); + + 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 "); +MODULE_DESCRIPTION("BlueFRITZ! USB driver ver " VERSION); +MODULE_VERSION(VERSION); +MODULE_LICENSE("GPL"); +MODULE_FIRMWARE("bfubase.frm"); -- cgit 1.2.3-korg