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![Mianhan Liu](/assets/img/avatar_default.png)
btrsi.c hasn't use any macro or function declared in net/genetlink.h. Thus, these files can be removed from btrsi.c safely without affecting the compilation of the ./drivers/bluetooth module Signed-off-by: Mianhan Liu <liumh1@shanghaitech.edu.cn> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
196 lines
4.5 KiB
C
196 lines
4.5 KiB
C
/*
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* Copyright (c) 2017 Redpine Signals Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include <asm/unaligned.h>
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#include <net/rsi_91x.h>
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#define RSI_DMA_ALIGN 8
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#define RSI_FRAME_DESC_SIZE 16
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#define RSI_HEADROOM_FOR_BT_HAL (RSI_FRAME_DESC_SIZE + RSI_DMA_ALIGN)
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struct rsi_hci_adapter {
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void *priv;
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struct rsi_proto_ops *proto_ops;
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struct hci_dev *hdev;
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};
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static int rsi_hci_open(struct hci_dev *hdev)
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{
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return 0;
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}
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static int rsi_hci_close(struct hci_dev *hdev)
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{
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return 0;
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}
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static int rsi_hci_flush(struct hci_dev *hdev)
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{
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return 0;
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}
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static int rsi_hci_send_pkt(struct hci_dev *hdev, struct sk_buff *skb)
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{
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struct rsi_hci_adapter *h_adapter = hci_get_drvdata(hdev);
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struct sk_buff *new_skb = NULL;
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switch (hci_skb_pkt_type(skb)) {
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case HCI_COMMAND_PKT:
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hdev->stat.cmd_tx++;
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break;
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case HCI_ACLDATA_PKT:
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hdev->stat.acl_tx++;
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break;
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case HCI_SCODATA_PKT:
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hdev->stat.sco_tx++;
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break;
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}
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if (skb_headroom(skb) < RSI_HEADROOM_FOR_BT_HAL) {
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/* Insufficient skb headroom - allocate a new skb */
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new_skb = skb_realloc_headroom(skb, RSI_HEADROOM_FOR_BT_HAL);
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if (unlikely(!new_skb))
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return -ENOMEM;
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bt_cb(new_skb)->pkt_type = hci_skb_pkt_type(skb);
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kfree_skb(skb);
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skb = new_skb;
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if (!IS_ALIGNED((unsigned long)skb->data, RSI_DMA_ALIGN)) {
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u8 *skb_data = skb->data;
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int skb_len = skb->len;
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skb_push(skb, RSI_DMA_ALIGN);
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skb_pull(skb, PTR_ALIGN(skb->data,
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RSI_DMA_ALIGN) - skb->data);
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memmove(skb->data, skb_data, skb_len);
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skb_trim(skb, skb_len);
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}
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}
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return h_adapter->proto_ops->coex_send_pkt(h_adapter->priv, skb,
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RSI_BT_Q);
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}
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static int rsi_hci_recv_pkt(void *priv, const u8 *pkt)
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{
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struct rsi_hci_adapter *h_adapter = priv;
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struct hci_dev *hdev = h_adapter->hdev;
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struct sk_buff *skb;
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int pkt_len = get_unaligned_le16(pkt) & 0x0fff;
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skb = dev_alloc_skb(pkt_len);
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if (!skb)
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return -ENOMEM;
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memcpy(skb->data, pkt + RSI_FRAME_DESC_SIZE, pkt_len);
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skb_put(skb, pkt_len);
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h_adapter->hdev->stat.byte_rx += skb->len;
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hci_skb_pkt_type(skb) = pkt[14];
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return hci_recv_frame(hdev, skb);
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}
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static int rsi_hci_attach(void *priv, struct rsi_proto_ops *ops)
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{
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struct rsi_hci_adapter *h_adapter = NULL;
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struct hci_dev *hdev;
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int err = 0;
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h_adapter = kzalloc(sizeof(*h_adapter), GFP_KERNEL);
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if (!h_adapter)
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return -ENOMEM;
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h_adapter->priv = priv;
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ops->set_bt_context(priv, h_adapter);
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h_adapter->proto_ops = ops;
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hdev = hci_alloc_dev();
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if (!hdev) {
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BT_ERR("Failed to alloc HCI device");
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goto err;
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}
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h_adapter->hdev = hdev;
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if (ops->get_host_intf(priv) == RSI_HOST_INTF_SDIO)
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hdev->bus = HCI_SDIO;
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else
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hdev->bus = HCI_USB;
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hci_set_drvdata(hdev, h_adapter);
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hdev->dev_type = HCI_PRIMARY;
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hdev->open = rsi_hci_open;
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hdev->close = rsi_hci_close;
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hdev->flush = rsi_hci_flush;
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hdev->send = rsi_hci_send_pkt;
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err = hci_register_dev(hdev);
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if (err < 0) {
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BT_ERR("HCI registration failed with errcode %d", err);
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hci_free_dev(hdev);
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goto err;
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}
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return 0;
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err:
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h_adapter->hdev = NULL;
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kfree(h_adapter);
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return -EINVAL;
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}
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static void rsi_hci_detach(void *priv)
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{
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struct rsi_hci_adapter *h_adapter = priv;
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struct hci_dev *hdev;
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if (!h_adapter)
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return;
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hdev = h_adapter->hdev;
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if (hdev) {
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hci_unregister_dev(hdev);
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hci_free_dev(hdev);
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h_adapter->hdev = NULL;
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}
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kfree(h_adapter);
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}
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const struct rsi_mod_ops rsi_bt_ops = {
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.attach = rsi_hci_attach,
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.detach = rsi_hci_detach,
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.recv_pkt = rsi_hci_recv_pkt,
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};
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EXPORT_SYMBOL(rsi_bt_ops);
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static int rsi_91x_bt_module_init(void)
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{
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return 0;
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}
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static void rsi_91x_bt_module_exit(void)
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{
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return;
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}
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module_init(rsi_91x_bt_module_init);
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module_exit(rsi_91x_bt_module_exit);
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MODULE_AUTHOR("Redpine Signals Inc");
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MODULE_DESCRIPTION("RSI BT driver");
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MODULE_LICENSE("Dual BSD/GPL");
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