Commit | Line | Data |
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e9a2dd26 MH |
1 | /* |
2 | * | |
3 | * Bluetooth HCI UART driver for Broadcom devices | |
4 | * | |
5 | * Copyright (C) 2015 Intel Corporation | |
6 | * | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | */ | |
23 | ||
24 | #include <linux/kernel.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/skbuff.h> | |
27 | ||
28 | #include <net/bluetooth/bluetooth.h> | |
29 | #include <net/bluetooth/hci_core.h> | |
30 | ||
bdd8818e | 31 | #include "btbcm.h" |
e9a2dd26 | 32 | #include "hci_uart.h" |
bdd8818e MH |
33 | |
34 | struct bcm_data { | |
35 | struct sk_buff *rx_skb; | |
36 | struct sk_buff_head txq; | |
37 | }; | |
38 | ||
39 | static int bcm_open(struct hci_uart *hu) | |
40 | { | |
41 | struct bcm_data *bcm; | |
42 | ||
43 | BT_DBG("hu %p", hu); | |
44 | ||
45 | bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); | |
46 | if (!bcm) | |
47 | return -ENOMEM; | |
48 | ||
49 | skb_queue_head_init(&bcm->txq); | |
50 | ||
51 | hu->priv = bcm; | |
52 | return 0; | |
53 | } | |
54 | ||
55 | static int bcm_close(struct hci_uart *hu) | |
56 | { | |
57 | struct bcm_data *bcm = hu->priv; | |
58 | ||
59 | BT_DBG("hu %p", hu); | |
60 | ||
61 | skb_queue_purge(&bcm->txq); | |
62 | kfree_skb(bcm->rx_skb); | |
63 | kfree(bcm); | |
64 | ||
65 | hu->priv = NULL; | |
66 | return 0; | |
67 | } | |
68 | ||
69 | static int bcm_flush(struct hci_uart *hu) | |
70 | { | |
71 | struct bcm_data *bcm = hu->priv; | |
72 | ||
73 | BT_DBG("hu %p", hu); | |
74 | ||
75 | skb_queue_purge(&bcm->txq); | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
80 | static int bcm_setup(struct hci_uart *hu) | |
81 | { | |
82 | BT_DBG("hu %p", hu); | |
83 | ||
84 | hu->hdev->set_bdaddr = btbcm_set_bdaddr; | |
85 | ||
86 | return btbcm_setup_patchram(hu->hdev); | |
87 | } | |
88 | ||
79b8df93 MH |
89 | static const struct h4_recv_pkt bcm_recv_pkts[] = { |
90 | { H4_RECV_ACL, .recv = hci_recv_frame }, | |
91 | { H4_RECV_SCO, .recv = hci_recv_frame }, | |
92 | { H4_RECV_EVENT, .recv = hci_recv_frame }, | |
93 | }; | |
94 | ||
bdd8818e MH |
95 | static int bcm_recv(struct hci_uart *hu, const void *data, int count) |
96 | { | |
97 | struct bcm_data *bcm = hu->priv; | |
98 | ||
99 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) | |
100 | return -EUNATCH; | |
101 | ||
79b8df93 MH |
102 | bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, |
103 | bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); | |
bdd8818e MH |
104 | if (IS_ERR(bcm->rx_skb)) { |
105 | int err = PTR_ERR(bcm->rx_skb); | |
106 | BT_ERR("%s: Frame reassembly failed (%d)", hu->hdev->name, err); | |
107 | return err; | |
108 | } | |
109 | ||
110 | return count; | |
111 | } | |
112 | ||
113 | static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) | |
114 | { | |
115 | struct bcm_data *bcm = hu->priv; | |
116 | ||
117 | BT_DBG("hu %p skb %p", hu, skb); | |
118 | ||
119 | /* Prepend skb with frame type */ | |
120 | memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); | |
121 | skb_queue_tail(&bcm->txq, skb); | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
126 | static struct sk_buff *bcm_dequeue(struct hci_uart *hu) | |
127 | { | |
128 | struct bcm_data *bcm = hu->priv; | |
129 | ||
130 | return skb_dequeue(&bcm->txq); | |
131 | } | |
132 | ||
133 | static const struct hci_uart_proto bcm_proto = { | |
134 | .id = HCI_UART_BCM, | |
135 | .name = "BCM", | |
136 | .open = bcm_open, | |
137 | .close = bcm_close, | |
138 | .flush = bcm_flush, | |
139 | .setup = bcm_setup, | |
140 | .recv = bcm_recv, | |
141 | .enqueue = bcm_enqueue, | |
142 | .dequeue = bcm_dequeue, | |
143 | }; | |
144 | ||
145 | int __init bcm_init(void) | |
146 | { | |
147 | return hci_uart_register_proto(&bcm_proto); | |
148 | } | |
149 | ||
150 | int __exit bcm_deinit(void) | |
151 | { | |
152 | return hci_uart_unregister_proto(&bcm_proto); | |
153 | } |