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v3.1
  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
 44struct ath_struct {
 45	struct hci_uart *hu;
 46	unsigned int cur_sleep;
 47
 
 48	struct sk_buff_head txq;
 49	struct work_struct ctxtsw;
 50};
 51
 52static int ath_wakeup_ar3k(struct tty_struct *tty)
 53{
 54	struct ktermios ktermios;
 55	int status = tty->driver->ops->tiocmget(tty);
 56
 57	if (status & TIOCM_CTS)
 58		return status;
 59
 60	/* Disable Automatic RTSCTS */
 61	memcpy(&ktermios, tty->termios, sizeof(ktermios));
 62	ktermios.c_cflag &= ~CRTSCTS;
 63	tty_set_termios(tty, &ktermios);
 64
 65	/* Clear RTS first */
 66	status = tty->driver->ops->tiocmget(tty);
 67	tty->driver->ops->tiocmset(tty, 0x00, TIOCM_RTS);
 68	mdelay(20);
 69
 70	/* Set RTS, wake up board */
 71	status = tty->driver->ops->tiocmget(tty);
 72	tty->driver->ops->tiocmset(tty, TIOCM_RTS, 0x00);
 73	mdelay(20);
 74
 75	status = tty->driver->ops->tiocmget(tty);
 76
 77	/* Disable Automatic RTSCTS */
 78	ktermios.c_cflag |= CRTSCTS;
 79	status = tty_set_termios(tty, &ktermios);
 80
 81	return status;
 82}
 83
 84static void ath_hci_uart_work(struct work_struct *work)
 85{
 86	int status;
 87	struct ath_struct *ath;
 88	struct hci_uart *hu;
 89	struct tty_struct *tty;
 90
 91	ath = container_of(work, struct ath_struct, ctxtsw);
 92
 93	hu = ath->hu;
 94	tty = hu->tty;
 95
 96	/* verify and wake up controller */
 97	if (ath->cur_sleep) {
 98		status = ath_wakeup_ar3k(tty);
 99		if (!(status & TIOCM_CTS))
100			return;
101	}
102
103	/* Ready to send Data */
104	clear_bit(HCI_UART_SENDING, &hu->tx_state);
105	hci_uart_tx_wakeup(hu);
106}
107
108/* Initialize protocol */
109static int ath_open(struct hci_uart *hu)
110{
111	struct ath_struct *ath;
112
113	BT_DBG("hu %p", hu);
114
115	ath = kzalloc(sizeof(*ath), GFP_ATOMIC);
116	if (!ath)
117		return -ENOMEM;
118
119	skb_queue_head_init(&ath->txq);
120
121	hu->priv = ath;
122	ath->hu = hu;
123
124	INIT_WORK(&ath->ctxtsw, ath_hci_uart_work);
125
126	return 0;
127}
128
129/* Flush protocol data */
130static int ath_flush(struct hci_uart *hu)
131{
132	struct ath_struct *ath = hu->priv;
133
134	BT_DBG("hu %p", hu);
135
136	skb_queue_purge(&ath->txq);
137
 
 
 
 
 
 
 
138	return 0;
139}
140
141/* Close protocol */
142static int ath_close(struct hci_uart *hu)
143{
144	struct ath_struct *ath = hu->priv;
145
146	BT_DBG("hu %p", hu);
147
148	skb_queue_purge(&ath->txq);
149
150	cancel_work_sync(&ath->ctxtsw);
 
151
152	hu->priv = NULL;
153	kfree(ath);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
154
155	return 0;
156}
157
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
158#define HCI_OP_ATH_SLEEP 0xFC04
159
160/* Enqueue frame for transmittion */
161static int ath_enqueue(struct hci_uart *hu, struct sk_buff *skb)
162{
163	struct ath_struct *ath = hu->priv;
164
165	if (bt_cb(skb)->pkt_type == HCI_SCODATA_PKT) {
166		kfree_skb(skb);
167		return 0;
168	}
169
170	/*
171	 * Update power management enable flag with parameters of
172	 * HCI sleep enable vendor specific HCI command.
173	 */
174	if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) {
175		struct hci_command_hdr *hdr = (void *)skb->data;
176
177		if (__le16_to_cpu(hdr->opcode) == HCI_OP_ATH_SLEEP)
178			ath->cur_sleep = skb->data[HCI_COMMAND_HDR_SIZE];
179	}
180
181	BT_DBG("hu %p skb %p", hu, skb);
182
183	/* Prepend skb with frame type */
184	memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
185
186	skb_queue_tail(&ath->txq, skb);
187	set_bit(HCI_UART_SENDING, &hu->tx_state);
188
189	schedule_work(&ath->ctxtsw);
190
191	return 0;
192}
193
194static struct sk_buff *ath_dequeue(struct hci_uart *hu)
195{
196	struct ath_struct *ath = hu->priv;
197
198	return skb_dequeue(&ath->txq);
199}
200
201/* Recv data */
202static int ath_recv(struct hci_uart *hu, void *data, int count)
203{
204	int ret;
205
206	ret = hci_recv_stream_fragment(hu->hdev, data, count);
207	if (ret < 0) {
208		BT_ERR("Frame Reassembly Failed");
209		return ret;
210	}
211
212	return count;
213}
214
215static struct hci_uart_proto athp = {
216	.id = HCI_UART_ATH3K,
217	.open = ath_open,
218	.close = ath_close,
219	.recv = ath_recv,
220	.enqueue = ath_enqueue,
221	.dequeue = ath_dequeue,
222	.flush = ath_flush,
223};
224
225int __init ath_init(void)
226{
227	int err = hci_uart_register_proto(&athp);
228
229	if (!err)
230		BT_INFO("HCIATH3K protocol initialized");
231	else
232		BT_ERR("HCIATH3K protocol registration failed");
233
234	return err;
235}
236
237int __exit ath_deinit(void)
238{
239	return hci_uart_unregister_proto(&athp);
240}
v4.6
  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
 44struct ath_struct {
 45	struct hci_uart *hu;
 46	unsigned int cur_sleep;
 47
 48	struct sk_buff *rx_skb;
 49	struct sk_buff_head txq;
 50	struct work_struct ctxtsw;
 51};
 52
 53static int ath_wakeup_ar3k(struct tty_struct *tty)
 54{
 
 55	int status = tty->driver->ops->tiocmget(tty);
 56
 57	if (status & TIOCM_CTS)
 58		return status;
 59
 
 
 
 
 
 60	/* Clear RTS first */
 61	tty->driver->ops->tiocmget(tty);
 62	tty->driver->ops->tiocmset(tty, 0x00, TIOCM_RTS);
 63	mdelay(20);
 64
 65	/* Set RTS, wake up board */
 66	tty->driver->ops->tiocmget(tty);
 67	tty->driver->ops->tiocmset(tty, TIOCM_RTS, 0x00);
 68	mdelay(20);
 69
 70	status = tty->driver->ops->tiocmget(tty);
 
 
 
 
 
 71	return status;
 72}
 73
 74static 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
 
 98static int ath_open(struct hci_uart *hu)
 99{
100	struct ath_struct *ath;
101
102	BT_DBG("hu %p", hu);
103
104	ath = kzalloc(sizeof(*ath), GFP_KERNEL);
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
118static int ath_close(struct hci_uart *hu)
 
119{
120	struct ath_struct *ath = hu->priv;
121
122	BT_DBG("hu %p", hu);
123
124	skb_queue_purge(&ath->txq);
125
126	kfree_skb(ath->rx_skb);
127
128	cancel_work_sync(&ath->ctxtsw);
129
130	hu->priv = NULL;
131	kfree(ath);
132
133	return 0;
134}
135
136static int ath_flush(struct hci_uart *hu)
 
137{
138	struct ath_struct *ath = hu->priv;
139
140	BT_DBG("hu %p", hu);
141
142	skb_queue_purge(&ath->txq);
143
144	return 0;
145}
146
147static 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
171static 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
180static 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};
185
186static int ath_recv(struct hci_uart *hu, const void *data, int count)
187{
188	struct ath_struct *ath = hu->priv;
189
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);
195		ath->rx_skb = NULL;
196		return err;
197	}
198
199	return count;
200}
201
202#define HCI_OP_ATH_SLEEP 0xFC04
203
 
204static int ath_enqueue(struct hci_uart *hu, struct sk_buff *skb)
205{
206	struct ath_struct *ath = hu->priv;
207
208	if (hci_skb_pkt_type(skb) == HCI_SCODATA_PKT) {
209		kfree_skb(skb);
210		return 0;
211	}
212
213	/* Update power management enable flag with parameters of
 
214	 * HCI sleep enable vendor specific HCI command.
215	 */
216	if (hci_skb_pkt_type(skb) == 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), &hci_skb_pkt_type(skb), 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
236static 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
243static const struct hci_uart_proto athp = {
244	.id		= HCI_UART_ATH3K,
245	.name		= "ATH3K",
246	.manufacturer	= 69,
247	.open		= ath_open,
248	.close		= ath_close,
249	.flush		= ath_flush,
250	.setup		= ath_setup,
251	.recv		= ath_recv,
252	.enqueue	= ath_enqueue,
253	.dequeue	= ath_dequeue,
 
 
 
 
 
 
 
 
 
 
 
254};
255
256int __init ath_init(void)
257{
258	return hci_uart_register_proto(&athp);
 
 
 
 
 
 
 
259}
260
261int __exit ath_deinit(void)
262{
263	return hci_uart_unregister_proto(&athp);
264}