Commit | Line | Data |
---|---|---|
b3190df6 SS |
1 | /* |
2 | * Atheros Communication Bluetooth HCIATH3K UART protocol | |
3 | * | |
4 | * HCIATH3K (HCI Atheros AR300x Protocol) is a Atheros Communication's | |
5 | * power management protocol extension to H4 to support AR300x Bluetooth Chip. | |
6 | * | |
7 | * Copyright (c) 2009-2010 Atheros Communications Inc. | |
8 | * | |
9 | * Acknowledgements: | |
10 | * This file is based on hci_h4.c, which was written | |
11 | * by Maxim Krasnyansky and Marcel Holtmann. | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
26 | * | |
27 | */ | |
28 | ||
29 | #include <linux/module.h> | |
30 | #include <linux/kernel.h> | |
31 | ||
32 | #include <linux/init.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/tty.h> | |
35 | #include <linux/errno.h> | |
36 | #include <linux/ioctl.h> | |
37 | #include <linux/skbuff.h> | |
38 | ||
39 | #include <net/bluetooth/bluetooth.h> | |
40 | #include <net/bluetooth/hci_core.h> | |
41 | ||
42 | #include "hci_uart.h" | |
43 | ||
44 | struct ath_struct { | |
45 | struct hci_uart *hu; | |
46 | unsigned int cur_sleep; | |
47 | ||
d90aa682 | 48 | struct sk_buff *rx_skb; |
b3190df6 SS |
49 | struct sk_buff_head txq; |
50 | struct work_struct ctxtsw; | |
51 | }; | |
52 | ||
53 | static int ath_wakeup_ar3k(struct tty_struct *tty) | |
54 | { | |
afaae084 | 55 | int status = tty->driver->ops->tiocmget(tty); |
b3190df6 SS |
56 | |
57 | if (status & TIOCM_CTS) | |
58 | return status; | |
59 | ||
b3190df6 | 60 | /* Clear RTS first */ |
632f32e2 | 61 | tty->driver->ops->tiocmget(tty); |
afaae084 | 62 | tty->driver->ops->tiocmset(tty, 0x00, TIOCM_RTS); |
b3190df6 SS |
63 | mdelay(20); |
64 | ||
65 | /* Set RTS, wake up board */ | |
632f32e2 | 66 | tty->driver->ops->tiocmget(tty); |
afaae084 | 67 | tty->driver->ops->tiocmset(tty, TIOCM_RTS, 0x00); |
b3190df6 SS |
68 | mdelay(20); |
69 | ||
afaae084 | 70 | status = tty->driver->ops->tiocmget(tty); |
b3190df6 SS |
71 | return status; |
72 | } | |
73 | ||
74 | static void ath_hci_uart_work(struct work_struct *work) | |
75 | { | |
76 | int status; | |
77 | struct ath_struct *ath; | |
78 | struct hci_uart *hu; | |
79 | struct tty_struct *tty; | |
80 | ||
81 | ath = container_of(work, struct ath_struct, ctxtsw); | |
82 | ||
83 | hu = ath->hu; | |
84 | tty = hu->tty; | |
85 | ||
86 | /* verify and wake up controller */ | |
87 | if (ath->cur_sleep) { | |
88 | status = ath_wakeup_ar3k(tty); | |
89 | if (!(status & TIOCM_CTS)) | |
90 | return; | |
91 | } | |
92 | ||
93 | /* Ready to send Data */ | |
94 | clear_bit(HCI_UART_SENDING, &hu->tx_state); | |
95 | hci_uart_tx_wakeup(hu); | |
96 | } | |
97 | ||
b3190df6 SS |
98 | static int ath_open(struct hci_uart *hu) |
99 | { | |
100 | struct ath_struct *ath; | |
101 | ||
102 | BT_DBG("hu %p", hu); | |
103 | ||
f5fd5bae | 104 | ath = kzalloc(sizeof(*ath), GFP_KERNEL); |
b3190df6 SS |
105 | if (!ath) |
106 | return -ENOMEM; | |
107 | ||
108 | skb_queue_head_init(&ath->txq); | |
109 | ||
110 | hu->priv = ath; | |
111 | ath->hu = hu; | |
112 | ||
113 | INIT_WORK(&ath->ctxtsw, ath_hci_uart_work); | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
c0ba7acd | 118 | static int ath_close(struct hci_uart *hu) |
b3190df6 SS |
119 | { |
120 | struct ath_struct *ath = hu->priv; | |
121 | ||
122 | BT_DBG("hu %p", hu); | |
123 | ||
124 | skb_queue_purge(&ath->txq); | |
125 | ||
c0ba7acd MH |
126 | kfree_skb(ath->rx_skb); |
127 | ||
128 | cancel_work_sync(&ath->ctxtsw); | |
129 | ||
130 | hu->priv = NULL; | |
131 | kfree(ath); | |
132 | ||
b3190df6 SS |
133 | return 0; |
134 | } | |
135 | ||
c0ba7acd | 136 | static int ath_flush(struct hci_uart *hu) |
b3190df6 SS |
137 | { |
138 | struct ath_struct *ath = hu->priv; | |
139 | ||
140 | BT_DBG("hu %p", hu); | |
141 | ||
142 | skb_queue_purge(&ath->txq); | |
143 | ||
c0ba7acd MH |
144 | return 0; |
145 | } | |
d90aa682 | 146 | |
4c876c0e MH |
147 | static int ath_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) |
148 | { | |
149 | struct sk_buff *skb; | |
150 | u8 buf[10]; | |
151 | int err; | |
152 | ||
153 | buf[0] = 0x01; | |
154 | buf[1] = 0x01; | |
155 | buf[2] = 0x00; | |
156 | buf[3] = sizeof(bdaddr_t); | |
157 | memcpy(buf + 4, bdaddr, sizeof(bdaddr_t)); | |
158 | ||
159 | skb = __hci_cmd_sync(hdev, 0xfc0b, sizeof(buf), buf, HCI_INIT_TIMEOUT); | |
160 | if (IS_ERR(skb)) { | |
161 | err = PTR_ERR(skb); | |
162 | BT_ERR("%s: Change address command failed (%d)", | |
163 | hdev->name, err); | |
164 | return err; | |
165 | } | |
166 | kfree_skb(skb); | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static int ath_setup(struct hci_uart *hu) | |
172 | { | |
173 | BT_DBG("hu %p", hu); | |
174 | ||
175 | hu->hdev->set_bdaddr = ath_set_bdaddr; | |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
c0ba7acd MH |
180 | static const struct h4_recv_pkt ath_recv_pkts[] = { |
181 | { H4_RECV_ACL, .recv = hci_recv_frame }, | |
182 | { H4_RECV_SCO, .recv = hci_recv_frame }, | |
183 | { H4_RECV_EVENT, .recv = hci_recv_frame }, | |
184 | }; | |
b3190df6 | 185 | |
c0ba7acd MH |
186 | static int ath_recv(struct hci_uart *hu, const void *data, int count) |
187 | { | |
188 | struct ath_struct *ath = hu->priv; | |
b3190df6 | 189 | |
c0ba7acd MH |
190 | ath->rx_skb = h4_recv_buf(hu->hdev, ath->rx_skb, data, count, |
191 | ath_recv_pkts, ARRAY_SIZE(ath_recv_pkts)); | |
192 | if (IS_ERR(ath->rx_skb)) { | |
193 | int err = PTR_ERR(ath->rx_skb); | |
194 | BT_ERR("%s: Frame reassembly failed (%d)", hu->hdev->name, err); | |
37134167 | 195 | ath->rx_skb = NULL; |
c0ba7acd MH |
196 | return err; |
197 | } | |
198 | ||
199 | return count; | |
b3190df6 SS |
200 | } |
201 | ||
202 | #define HCI_OP_ATH_SLEEP 0xFC04 | |
203 | ||
b3190df6 SS |
204 | static int ath_enqueue(struct hci_uart *hu, struct sk_buff *skb) |
205 | { | |
206 | struct ath_struct *ath = hu->priv; | |
207 | ||
208 | if (bt_cb(skb)->pkt_type == HCI_SCODATA_PKT) { | |
4ebaa4ed | 209 | kfree_skb(skb); |
b3190df6 SS |
210 | return 0; |
211 | } | |
212 | ||
c0ba7acd | 213 | /* Update power management enable flag with parameters of |
b3190df6 SS |
214 | * HCI sleep enable vendor specific HCI command. |
215 | */ | |
216 | if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) { | |
217 | struct hci_command_hdr *hdr = (void *)skb->data; | |
218 | ||
219 | if (__le16_to_cpu(hdr->opcode) == HCI_OP_ATH_SLEEP) | |
220 | ath->cur_sleep = skb->data[HCI_COMMAND_HDR_SIZE]; | |
221 | } | |
222 | ||
223 | BT_DBG("hu %p skb %p", hu, skb); | |
224 | ||
225 | /* Prepend skb with frame type */ | |
226 | memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); | |
227 | ||
228 | skb_queue_tail(&ath->txq, skb); | |
229 | set_bit(HCI_UART_SENDING, &hu->tx_state); | |
230 | ||
231 | schedule_work(&ath->ctxtsw); | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
236 | static struct sk_buff *ath_dequeue(struct hci_uart *hu) | |
237 | { | |
238 | struct ath_struct *ath = hu->priv; | |
239 | ||
240 | return skb_dequeue(&ath->txq); | |
241 | } | |
242 | ||
4ee7ef19 | 243 | static const struct hci_uart_proto athp = { |
7c40fb8d MH |
244 | .id = HCI_UART_ATH3K, |
245 | .name = "ATH3K", | |
aee61f7a | 246 | .manufacturer = 69, |
7c40fb8d MH |
247 | .open = ath_open, |
248 | .close = ath_close, | |
c0ba7acd | 249 | .flush = ath_flush, |
4c876c0e | 250 | .setup = ath_setup, |
7c40fb8d MH |
251 | .recv = ath_recv, |
252 | .enqueue = ath_enqueue, | |
253 | .dequeue = ath_dequeue, | |
b3190df6 SS |
254 | }; |
255 | ||
f2b94bb9 | 256 | int __init ath_init(void) |
b3190df6 | 257 | { |
01009eec | 258 | return hci_uart_register_proto(&athp); |
b3190df6 SS |
259 | } |
260 | ||
f2b94bb9 | 261 | int __exit ath_deinit(void) |
b3190df6 SS |
262 | { |
263 | return hci_uart_unregister_proto(&athp); | |
264 | } |