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-rw-r--r--drivers/bluetooth/Kconfig12
-rw-r--r--drivers/bluetooth/Makefile1
-rw-r--r--drivers/bluetooth/bluecard_cs.c6
-rw-r--r--drivers/bluetooth/bt3c_cs.c2
-rw-r--r--drivers/bluetooth/btmrvl_main.c8
-rw-r--r--drivers/bluetooth/btmrvl_sdio.c3
-rw-r--r--drivers/bluetooth/btuart_cs.c2
-rw-r--r--drivers/bluetooth/dtl1_cs.c18
-rw-r--r--drivers/bluetooth/hci_h5.c747
-rw-r--r--drivers/bluetooth/hci_ldisc.c66
-rw-r--r--drivers/bluetooth/hci_uart.h10
11 files changed, 848 insertions, 27 deletions
diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
index 5ccf142ef0b8..e9f203eadb1f 100644
--- a/drivers/bluetooth/Kconfig
+++ b/drivers/bluetooth/Kconfig
@@ -81,6 +81,18 @@ config BT_HCIUART_LL
81 81
82 Say Y here to compile support for HCILL protocol. 82 Say Y here to compile support for HCILL protocol.
83 83
84config BT_HCIUART_3WIRE
85 bool "Three-wire UART (H5) protocol support"
86 depends on BT_HCIUART
87 help
88 The HCI Three-wire UART Transport Layer makes it possible to
89 user the Bluetooth HCI over a serial port interface. The HCI
90 Three-wire UART Transport Layer assumes that the UART
91 communication may have bit errors, overrun errors or burst
92 errors and thereby making CTS/RTS lines unnecessary.
93
94 Say Y here to compile support for Three-wire UART protocol.
95
84config BT_HCIBCM203X 96config BT_HCIBCM203X
85 tristate "HCI BCM203x USB driver" 97 tristate "HCI BCM203x USB driver"
86 depends on USB 98 depends on USB
diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile
index f4460f4f4b78..4afae20df512 100644
--- a/drivers/bluetooth/Makefile
+++ b/drivers/bluetooth/Makefile
@@ -28,4 +28,5 @@ hci_uart-$(CONFIG_BT_HCIUART_H4) += hci_h4.o
28hci_uart-$(CONFIG_BT_HCIUART_BCSP) += hci_bcsp.o 28hci_uart-$(CONFIG_BT_HCIUART_BCSP) += hci_bcsp.o
29hci_uart-$(CONFIG_BT_HCIUART_LL) += hci_ll.o 29hci_uart-$(CONFIG_BT_HCIUART_LL) += hci_ll.o
30hci_uart-$(CONFIG_BT_HCIUART_ATH3K) += hci_ath.o 30hci_uart-$(CONFIG_BT_HCIUART_ATH3K) += hci_ath.o
31hci_uart-$(CONFIG_BT_HCIUART_3WIRE) += hci_h5.o
31hci_uart-objs := $(hci_uart-y) 32hci_uart-objs := $(hci_uart-y)
diff --git a/drivers/bluetooth/bluecard_cs.c b/drivers/bluetooth/bluecard_cs.c
index 585c88e01893..66c3a6770c41 100644
--- a/drivers/bluetooth/bluecard_cs.c
+++ b/drivers/bluetooth/bluecard_cs.c
@@ -621,7 +621,6 @@ static int bluecard_hci_flush(struct hci_dev *hdev)
621static int bluecard_hci_open(struct hci_dev *hdev) 621static int bluecard_hci_open(struct hci_dev *hdev)
622{ 622{
623 bluecard_info_t *info = hci_get_drvdata(hdev); 623 bluecard_info_t *info = hci_get_drvdata(hdev);
624 unsigned int iobase = info->p_dev->resource[0]->start;
625 624
626 if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) 625 if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
627 bluecard_hci_set_baud_rate(hdev, DEFAULT_BAUD_RATE); 626 bluecard_hci_set_baud_rate(hdev, DEFAULT_BAUD_RATE);
@@ -630,6 +629,8 @@ static int bluecard_hci_open(struct hci_dev *hdev)
630 return 0; 629 return 0;
631 630
632 if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) { 631 if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) {
632 unsigned int iobase = info->p_dev->resource[0]->start;
633
633 /* Enable LED */ 634 /* Enable LED */
634 outb(0x08 | 0x20, iobase + 0x30); 635 outb(0x08 | 0x20, iobase + 0x30);
635 } 636 }
@@ -641,7 +642,6 @@ static int bluecard_hci_open(struct hci_dev *hdev)
641static int bluecard_hci_close(struct hci_dev *hdev) 642static int bluecard_hci_close(struct hci_dev *hdev)
642{ 643{
643 bluecard_info_t *info = hci_get_drvdata(hdev); 644 bluecard_info_t *info = hci_get_drvdata(hdev);
644 unsigned int iobase = info->p_dev->resource[0]->start;
645 645
646 if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags))) 646 if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
647 return 0; 647 return 0;
@@ -649,6 +649,8 @@ static int bluecard_hci_close(struct hci_dev *hdev)
649 bluecard_hci_flush(hdev); 649 bluecard_hci_flush(hdev);
650 650
651 if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) { 651 if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) {
652 unsigned int iobase = info->p_dev->resource[0]->start;
653
652 /* Disable LED */ 654 /* Disable LED */
653 outb(0x00, iobase + 0x30); 655 outb(0x00, iobase + 0x30);
654 } 656 }
diff --git a/drivers/bluetooth/bt3c_cs.c b/drivers/bluetooth/bt3c_cs.c
index b2b0fbbb43b5..8925b6d672a6 100644
--- a/drivers/bluetooth/bt3c_cs.c
+++ b/drivers/bluetooth/bt3c_cs.c
@@ -664,7 +664,7 @@ static int bt3c_check_config(struct pcmcia_device *p_dev, void *priv_data)
664{ 664{
665 int *try = priv_data; 665 int *try = priv_data;
666 666
667 if (try == 0) 667 if (!try)
668 p_dev->io_lines = 16; 668 p_dev->io_lines = 16;
669 669
670 if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0)) 670 if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0))
diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c
index dc304def8400..3a4343b3bd6d 100644
--- a/drivers/bluetooth/btmrvl_main.c
+++ b/drivers/bluetooth/btmrvl_main.c
@@ -47,10 +47,11 @@ EXPORT_SYMBOL_GPL(btmrvl_interrupt);
47bool btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb) 47bool btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb)
48{ 48{
49 struct hci_event_hdr *hdr = (void *) skb->data; 49 struct hci_event_hdr *hdr = (void *) skb->data;
50 struct hci_ev_cmd_complete *ec;
51 u16 opcode, ocf, ogf;
52 50
53 if (hdr->evt == HCI_EV_CMD_COMPLETE) { 51 if (hdr->evt == HCI_EV_CMD_COMPLETE) {
52 struct hci_ev_cmd_complete *ec;
53 u16 opcode, ocf, ogf;
54
54 ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE); 55 ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE);
55 opcode = __le16_to_cpu(ec->opcode); 56 opcode = __le16_to_cpu(ec->opcode);
56 ocf = hci_opcode_ocf(opcode); 57 ocf = hci_opcode_ocf(opcode);
@@ -64,7 +65,8 @@ bool btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb)
64 } 65 }
65 66
66 if (ogf == OGF) { 67 if (ogf == OGF) {
67 BT_DBG("vendor event skipped: ogf 0x%4.4x", ogf); 68 BT_DBG("vendor event skipped: ogf 0x%4.4x ocf 0x%4.4x",
69 ogf, ocf);
68 kfree_skb(skb); 70 kfree_skb(skb);
69 return false; 71 return false;
70 } 72 }
diff --git a/drivers/bluetooth/btmrvl_sdio.c b/drivers/bluetooth/btmrvl_sdio.c
index cf7588edba0d..6a9e9717d3ab 100644
--- a/drivers/bluetooth/btmrvl_sdio.c
+++ b/drivers/bluetooth/btmrvl_sdio.c
@@ -568,8 +568,9 @@ static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
568 if (type == HCI_EVENT_PKT) { 568 if (type == HCI_EVENT_PKT) {
569 if (btmrvl_check_evtpkt(priv, skb)) 569 if (btmrvl_check_evtpkt(priv, skb))
570 hci_recv_frame(skb); 570 hci_recv_frame(skb);
571 } else 571 } else {
572 hci_recv_frame(skb); 572 hci_recv_frame(skb);
573 }
573 574
574 hdev->stat.byte_rx += buf_len; 575 hdev->stat.byte_rx += buf_len;
575 break; 576 break;
diff --git a/drivers/bluetooth/btuart_cs.c b/drivers/bluetooth/btuart_cs.c
index 65b8d996840c..21e803a6a281 100644
--- a/drivers/bluetooth/btuart_cs.c
+++ b/drivers/bluetooth/btuart_cs.c
@@ -593,7 +593,7 @@ static int btuart_check_config(struct pcmcia_device *p_dev, void *priv_data)
593{ 593{
594 int *try = priv_data; 594 int *try = priv_data;
595 595
596 if (try == 0) 596 if (!try)
597 p_dev->io_lines = 16; 597 p_dev->io_lines = 16;
598 598
599 if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0)) 599 if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0))
diff --git a/drivers/bluetooth/dtl1_cs.c b/drivers/bluetooth/dtl1_cs.c
index b1b37ccd3cd4..97a7784db4a2 100644
--- a/drivers/bluetooth/dtl1_cs.c
+++ b/drivers/bluetooth/dtl1_cs.c
@@ -586,29 +586,31 @@ static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data)
586static int dtl1_config(struct pcmcia_device *link) 586static int dtl1_config(struct pcmcia_device *link)
587{ 587{
588 dtl1_info_t *info = link->priv; 588 dtl1_info_t *info = link->priv;
589 int i; 589 int ret;
590 590
591 /* Look for a generic full-sized window */ 591 /* Look for a generic full-sized window */
592 link->resource[0]->end = 8; 592 link->resource[0]->end = 8;
593 if (pcmcia_loop_config(link, dtl1_confcheck, NULL) < 0) 593 ret = pcmcia_loop_config(link, dtl1_confcheck, NULL);
594 if (ret)
594 goto failed; 595 goto failed;
595 596
596 i = pcmcia_request_irq(link, dtl1_interrupt); 597 ret = pcmcia_request_irq(link, dtl1_interrupt);
597 if (i != 0) 598 if (ret)
598 goto failed; 599 goto failed;
599 600
600 i = pcmcia_enable_device(link); 601 ret = pcmcia_enable_device(link);
601 if (i != 0) 602 if (ret)
602 goto failed; 603 goto failed;
603 604
604 if (dtl1_open(info) != 0) 605 ret = dtl1_open(info);
606 if (ret)
605 goto failed; 607 goto failed;
606 608
607 return 0; 609 return 0;
608 610
609failed: 611failed:
610 dtl1_detach(link); 612 dtl1_detach(link);
611 return -ENODEV; 613 return ret;
612} 614}
613 615
614static const struct pcmcia_device_id dtl1_ids[] = { 616static const struct pcmcia_device_id dtl1_ids[] = {
diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
new file mode 100644
index 000000000000..b6154d5a07a5
--- /dev/null
+++ b/drivers/bluetooth/hci_h5.c
@@ -0,0 +1,747 @@
1/*
2 *
3 * Bluetooth HCI Three-wire UART driver
4 *
5 * Copyright (C) 2012 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
31#include "hci_uart.h"
32
33#define HCI_3WIRE_ACK_PKT 0
34#define HCI_3WIRE_LINK_PKT 15
35
36/* Sliding window size */
37#define H5_TX_WIN_MAX 4
38
39#define H5_ACK_TIMEOUT msecs_to_jiffies(250)
40#define H5_SYNC_TIMEOUT msecs_to_jiffies(100)
41
42/*
43 * Maximum Three-wire packet:
44 * 4 byte header + max value for 12-bit length + 2 bytes for CRC
45 */
46#define H5_MAX_LEN (4 + 0xfff + 2)
47
48/* Convenience macros for reading Three-wire header values */
49#define H5_HDR_SEQ(hdr) ((hdr)[0] & 0x07)
50#define H5_HDR_ACK(hdr) (((hdr)[0] >> 3) & 0x07)
51#define H5_HDR_CRC(hdr) (((hdr)[0] >> 6) & 0x01)
52#define H5_HDR_RELIABLE(hdr) (((hdr)[0] >> 7) & 0x01)
53#define H5_HDR_PKT_TYPE(hdr) ((hdr)[1] & 0x0f)
54#define H5_HDR_LEN(hdr) ((((hdr)[1] >> 4) & 0xff) + ((hdr)[2] << 4))
55
56#define SLIP_DELIMITER 0xc0
57#define SLIP_ESC 0xdb
58#define SLIP_ESC_DELIM 0xdc
59#define SLIP_ESC_ESC 0xdd
60
61/* H5 state flags */
62enum {
63 H5_RX_ESC, /* SLIP escape mode */
64 H5_TX_ACK_REQ, /* Pending ack to send */
65};
66
67struct h5 {
68 struct sk_buff_head unack; /* Unack'ed packets queue */
69 struct sk_buff_head rel; /* Reliable packets queue */
70 struct sk_buff_head unrel; /* Unreliable packets queue */
71
72 unsigned long flags;
73
74 struct sk_buff *rx_skb; /* Receive buffer */
75 size_t rx_pending; /* Expecting more bytes */
76 u8 rx_ack; /* Last ack number received */
77
78 int (*rx_func) (struct hci_uart *hu, u8 c);
79
80 struct timer_list timer; /* Retransmission timer */
81
82 u8 tx_seq; /* Next seq number to send */
83 u8 tx_ack; /* Next ack number to send */
84 u8 tx_win; /* Sliding window size */
85
86 enum {
87 H5_UNINITIALIZED,
88 H5_INITIALIZED,
89 H5_ACTIVE,
90 } state;
91
92 enum {
93 H5_AWAKE,
94 H5_SLEEPING,
95 H5_WAKING_UP,
96 } sleep;
97};
98
99static void h5_reset_rx(struct h5 *h5);
100
101static void h5_link_control(struct hci_uart *hu, const void *data, size_t len)
102{
103 struct h5 *h5 = hu->priv;
104 struct sk_buff *nskb;
105
106 nskb = alloc_skb(3, GFP_ATOMIC);
107 if (!nskb)
108 return;
109
110 bt_cb(nskb)->pkt_type = HCI_3WIRE_LINK_PKT;
111
112 memcpy(skb_put(nskb, len), data, len);
113
114 skb_queue_tail(&h5->unrel, nskb);
115}
116
117static u8 h5_cfg_field(struct h5 *h5)
118{
119 u8 field = 0;
120
121 /* Sliding window size (first 3 bits) */
122 field |= (h5->tx_win & 7);
123
124 return field;
125}
126
127static void h5_timed_event(unsigned long arg)
128{
129 const unsigned char sync_req[] = { 0x01, 0x7e };
130 unsigned char conf_req[] = { 0x03, 0xfc, 0x01 };
131 struct hci_uart *hu = (struct hci_uart *) arg;
132 struct h5 *h5 = hu->priv;
133 struct sk_buff *skb;
134 unsigned long flags;
135
136 BT_DBG("%s", hu->hdev->name);
137
138 if (h5->state == H5_UNINITIALIZED)
139 h5_link_control(hu, sync_req, sizeof(sync_req));
140
141 if (h5->state == H5_INITIALIZED) {
142 conf_req[2] = h5_cfg_field(h5);
143 h5_link_control(hu, conf_req, sizeof(conf_req));
144 }
145
146 if (h5->state != H5_ACTIVE) {
147 mod_timer(&h5->timer, jiffies + H5_SYNC_TIMEOUT);
148 goto wakeup;
149 }
150
151 if (h5->sleep != H5_AWAKE) {
152 h5->sleep = H5_SLEEPING;
153 goto wakeup;
154 }
155
156 BT_DBG("hu %p retransmitting %u pkts", hu, h5->unack.qlen);
157
158 spin_lock_irqsave_nested(&h5->unack.lock, flags, SINGLE_DEPTH_NESTING);
159
160 while ((skb = __skb_dequeue_tail(&h5->unack)) != NULL) {
161 h5->tx_seq = (h5->tx_seq - 1) & 0x07;
162 skb_queue_head(&h5->rel, skb);
163 }
164
165 spin_unlock_irqrestore(&h5->unack.lock, flags);
166
167wakeup:
168 hci_uart_tx_wakeup(hu);
169}
170
171static int h5_open(struct hci_uart *hu)
172{
173 struct h5 *h5;
174 const unsigned char sync[] = { 0x01, 0x7e };
175
176 BT_DBG("hu %p", hu);
177
178 h5 = kzalloc(sizeof(*h5), GFP_KERNEL);
179 if (!h5)
180 return -ENOMEM;
181
182 hu->priv = h5;
183
184 skb_queue_head_init(&h5->unack);
185 skb_queue_head_init(&h5->rel);
186 skb_queue_head_init(&h5->unrel);
187
188 h5_reset_rx(h5);
189
190 init_timer(&h5->timer);
191 h5->timer.function = h5_timed_event;
192 h5->timer.data = (unsigned long) hu;
193
194 h5->tx_win = H5_TX_WIN_MAX;
195
196 set_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags);
197
198 /* Send initial sync request */
199 h5_link_control(hu, sync, sizeof(sync));
200 mod_timer(&h5->timer, jiffies + H5_SYNC_TIMEOUT);
201
202 return 0;
203}
204
205static int h5_close(struct hci_uart *hu)
206{
207 struct h5 *h5 = hu->priv;
208
209 skb_queue_purge(&h5->unack);
210 skb_queue_purge(&h5->rel);
211 skb_queue_purge(&h5->unrel);
212
213 del_timer(&h5->timer);
214
215 kfree(h5);
216
217 return 0;
218}
219
220static void h5_pkt_cull(struct h5 *h5)
221{
222 struct sk_buff *skb, *tmp;
223 unsigned long flags;
224 int i, to_remove;
225 u8 seq;
226
227 spin_lock_irqsave(&h5->unack.lock, flags);
228
229 to_remove = skb_queue_len(&h5->unack);
230 if (to_remove == 0)
231 goto unlock;
232
233 seq = h5->tx_seq;
234
235 while (to_remove > 0) {
236 if (h5->rx_ack == seq)
237 break;
238
239 to_remove--;
240 seq = (seq - 1) % 8;
241 }
242
243 if (seq != h5->rx_ack)
244 BT_ERR("Controller acked invalid packet");
245
246 i = 0;
247 skb_queue_walk_safe(&h5->unack, skb, tmp) {
248 if (i++ >= to_remove)
249 break;
250
251 __skb_unlink(skb, &h5->unack);
252 kfree_skb(skb);
253 }
254
255 if (skb_queue_empty(&h5->unack))
256 del_timer(&h5->timer);
257
258unlock:
259 spin_unlock_irqrestore(&h5->unack.lock, flags);
260}
261
262static void h5_handle_internal_rx(struct hci_uart *hu)
263{
264 struct h5 *h5 = hu->priv;
265 const unsigned char sync_req[] = { 0x01, 0x7e };
266 const unsigned char sync_rsp[] = { 0x02, 0x7d };
267 unsigned char conf_req[] = { 0x03, 0xfc, 0x01 };
268 const unsigned char conf_rsp[] = { 0x04, 0x7b };
269 const unsigned char wakeup_req[] = { 0x05, 0xfa };
270 const unsigned char woken_req[] = { 0x06, 0xf9 };
271 const unsigned char sleep_req[] = { 0x07, 0x78 };
272 const unsigned char *hdr = h5->rx_skb->data;
273 const unsigned char *data = &h5->rx_skb->data[4];
274
275 BT_DBG("%s", hu->hdev->name);
276
277 if (H5_HDR_PKT_TYPE(hdr) != HCI_3WIRE_LINK_PKT)
278 return;
279
280 if (H5_HDR_LEN(hdr) < 2)
281 return;
282
283 conf_req[2] = h5_cfg_field(h5);
284
285 if (memcmp(data, sync_req, 2) == 0) {
286 h5_link_control(hu, sync_rsp, 2);
287 } else if (memcmp(data, sync_rsp, 2) == 0) {
288 h5->state = H5_INITIALIZED;
289 h5_link_control(hu, conf_req, 3);
290 } else if (memcmp(data, conf_req, 2) == 0) {
291 h5_link_control(hu, conf_rsp, 2);
292 h5_link_control(hu, conf_req, 3);
293 } else if (memcmp(data, conf_rsp, 2) == 0) {
294 if (H5_HDR_LEN(hdr) > 2)
295 h5->tx_win = (data[2] & 7);
296 BT_DBG("Three-wire init complete. tx_win %u", h5->tx_win);
297 h5->state = H5_ACTIVE;
298 hci_uart_init_ready(hu);
299 return;
300 } else if (memcmp(data, sleep_req, 2) == 0) {
301 BT_DBG("Peer went to sleep");
302 h5->sleep = H5_SLEEPING;
303 return;
304 } else if (memcmp(data, woken_req, 2) == 0) {
305 BT_DBG("Peer woke up");
306 h5->sleep = H5_AWAKE;
307 } else if (memcmp(data, wakeup_req, 2) == 0) {
308 BT_DBG("Peer requested wakeup");
309 h5_link_control(hu, woken_req, 2);
310 h5->sleep = H5_AWAKE;
311 } else {
312 BT_DBG("Link Control: 0x%02hhx 0x%02hhx", data[0], data[1]);
313 return;
314 }
315
316 hci_uart_tx_wakeup(hu);
317}
318
319static void h5_complete_rx_pkt(struct hci_uart *hu)
320{
321 struct h5 *h5 = hu->priv;
322 const unsigned char *hdr = h5->rx_skb->data;
323
324 if (H5_HDR_RELIABLE(hdr)) {
325 h5->tx_ack = (h5->tx_ack + 1) % 8;
326 set_bit(H5_TX_ACK_REQ, &h5->flags);
327 hci_uart_tx_wakeup(hu);
328 }
329
330 h5->rx_ack = H5_HDR_ACK(hdr);
331
332 h5_pkt_cull(h5);
333
334 switch (H5_HDR_PKT_TYPE(hdr)) {
335 case HCI_EVENT_PKT:
336 case HCI_ACLDATA_PKT:
337 case HCI_SCODATA_PKT:
338 bt_cb(h5->rx_skb)->pkt_type = H5_HDR_PKT_TYPE(hdr);
339
340 /* Remove Three-wire header */
341 skb_pull(h5->rx_skb, 4);
342
343 hci_recv_frame(h5->rx_skb);
344 h5->rx_skb = NULL;
345
346 break;
347
348 default:
349 h5_handle_internal_rx(hu);
350 break;
351 }
352
353 h5_reset_rx(h5);
354}
355
356static int h5_rx_crc(struct hci_uart *hu, unsigned char c)
357{
358 struct h5 *h5 = hu->priv;
359
360 h5_complete_rx_pkt(hu);
361 h5_reset_rx(h5);
362
363 return 0;
364}
365
366static int h5_rx_payload(struct hci_uart *hu, unsigned char c)
367{
368 struct h5 *h5 = hu->priv;
369 const unsigned char *hdr = h5->rx_skb->data;
370
371 if (H5_HDR_CRC(hdr)) {
372 h5->rx_func = h5_rx_crc;
373 h5->rx_pending = 2;
374 } else {
375 h5_complete_rx_pkt(hu);
376 h5_reset_rx(h5);
377 }
378
379 return 0;
380}
381
382static int h5_rx_3wire_hdr(struct hci_uart *hu, unsigned char c)
383{
384 struct h5 *h5 = hu->priv;
385 const unsigned char *hdr = h5->rx_skb->data;
386
387 BT_DBG("%s rx: seq %u ack %u crc %u rel %u type %u len %u",
388 hu->hdev->name, H5_HDR_SEQ(hdr), H5_HDR_ACK(hdr),
389 H5_HDR_CRC(hdr), H5_HDR_RELIABLE(hdr), H5_HDR_PKT_TYPE(hdr),
390 H5_HDR_LEN(hdr));
391
392 if (((hdr[0] + hdr[1] + hdr[2] + hdr[3]) & 0xff) != 0xff) {
393 BT_ERR("Invalid header checksum");
394 h5_reset_rx(h5);
395 return 0;
396 }
397
398 if (H5_HDR_RELIABLE(hdr) && H5_HDR_SEQ(hdr) != h5->tx_ack) {
399 BT_ERR("Out-of-order packet arrived (%u != %u)",
400 H5_HDR_SEQ(hdr), h5->tx_ack);
401 h5_reset_rx(h5);
402 return 0;
403 }
404
405 if (h5->state != H5_ACTIVE &&
406 H5_HDR_PKT_TYPE(hdr) != HCI_3WIRE_LINK_PKT) {
407 BT_ERR("Non-link packet received in non-active state");
408 h5_reset_rx(h5);
409 }
410
411 h5->rx_func = h5_rx_payload;
412 h5->rx_pending = H5_HDR_LEN(hdr);
413
414 return 0;
415}
416
417static int h5_rx_pkt_start(struct hci_uart *hu, unsigned char c)
418{
419 struct h5 *h5 = hu->priv;
420
421 if (c == SLIP_DELIMITER)
422 return 1;
423
424 h5->rx_func = h5_rx_3wire_hdr;
425 h5->rx_pending = 4;
426
427 h5->rx_skb = bt_skb_alloc(H5_MAX_LEN, GFP_ATOMIC);
428 if (!h5->rx_skb) {
429 BT_ERR("Can't allocate mem for new packet");
430 h5_reset_rx(h5);
431 return -ENOMEM;
432 }
433
434 h5->rx_skb->dev = (void *) hu->hdev;
435
436 return 0;
437}
438
439static int h5_rx_delimiter(struct hci_uart *hu, unsigned char c)
440{
441 struct h5 *h5 = hu->priv;
442
443 if (c == SLIP_DELIMITER)
444 h5->rx_func = h5_rx_pkt_start;
445
446 return 1;
447}
448
449static void h5_unslip_one_byte(struct h5 *h5, unsigned char c)
450{
451 const u8 delim = SLIP_DELIMITER, esc = SLIP_ESC;
452 const u8 *byte = &c;
453
454 if (!test_bit(H5_RX_ESC, &h5->flags) && c == SLIP_ESC) {
455 set_bit(H5_RX_ESC, &h5->flags);
456 return;
457 }
458
459 if (test_and_clear_bit(H5_RX_ESC, &h5->flags)) {
460 switch (c) {
461 case SLIP_ESC_DELIM:
462 byte = &delim;
463 break;
464 case SLIP_ESC_ESC:
465 byte = &esc;
466 break;
467 default:
468 BT_ERR("Invalid esc byte 0x%02hhx", c);
469 h5_reset_rx(h5);
470 return;
471 }
472 }
473
474 memcpy(skb_put(h5->rx_skb, 1), byte, 1);
475 h5->rx_pending--;
476
477 BT_DBG("unsliped 0x%02hhx, rx_pending %zu", *byte, h5->rx_pending);
478}
479
480static void h5_reset_rx(struct h5 *h5)
481{
482 if (h5->rx_skb) {
483 kfree_skb(h5->rx_skb);
484 h5->rx_skb = NULL;
485 }
486
487 h5->rx_func = h5_rx_delimiter;
488 h5->rx_pending = 0;
489 clear_bit(H5_RX_ESC, &h5->flags);
490}
491
492static int h5_recv(struct hci_uart *hu, void *data, int count)
493{
494 struct h5 *h5 = hu->priv;
495 unsigned char *ptr = data;
496
497 BT_DBG("%s pending %zu count %d", hu->hdev->name, h5->rx_pending,
498 count);
499
500 while (count > 0) {
501 int processed;
502
503 if (h5->rx_pending > 0) {
504 if (*ptr == SLIP_DELIMITER) {
505 BT_ERR("Too short H5 packet");
506 h5_reset_rx(h5);
507 continue;
508 }
509
510 h5_unslip_one_byte(h5, *ptr);
511
512 ptr++; count--;
513 continue;
514 }
515
516 processed = h5->rx_func(hu, *ptr);
517 if (processed < 0)
518 return processed;
519
520 ptr += processed;
521 count -= processed;
522 }
523
524 return 0;
525}
526
527static int h5_enqueue(struct hci_uart *hu, struct sk_buff *skb)
528{
529 struct h5 *h5 = hu->priv;
530
531 if (skb->len > 0xfff) {
532 BT_ERR("Packet too long (%u bytes)", skb->len);
533 kfree_skb(skb);
534 return 0;
535 }
536
537 if (h5->state != H5_ACTIVE) {
538 BT_ERR("Ignoring HCI data in non-active state");
539 kfree_skb(skb);
540 return 0;
541 }
542
543 switch (bt_cb(skb)->pkt_type) {
544 case HCI_ACLDATA_PKT:
545 case HCI_COMMAND_PKT:
546 skb_queue_tail(&h5->rel, skb);
547 break;
548
549 case HCI_SCODATA_PKT:
550 skb_queue_tail(&h5->unrel, skb);
551 break;
552
553 default:
554 BT_ERR("Unknown packet type %u", bt_cb(skb)->pkt_type);
555 kfree_skb(skb);
556 break;
557 }
558
559 return 0;
560}
561
562static void h5_slip_delim(struct sk_buff *skb)
563{
564 const char delim = SLIP_DELIMITER;
565
566 memcpy(skb_put(skb, 1), &delim, 1);
567}
568
569static void h5_slip_one_byte(struct sk_buff *skb, u8 c)
570{
571 const char esc_delim[2] = { SLIP_ESC, SLIP_ESC_DELIM };
572 const char esc_esc[2] = { SLIP_ESC, SLIP_ESC_ESC };
573
574 switch (c) {
575 case SLIP_DELIMITER:
576 memcpy(skb_put(skb, 2), &esc_delim, 2);
577 break;
578 case SLIP_ESC:
579 memcpy(skb_put(skb, 2), &esc_esc, 2);
580 break;
581 default:
582 memcpy(skb_put(skb, 1), &c, 1);
583 }
584}
585
586static bool valid_packet_type(u8 type)
587{
588 switch (type) {
589 case HCI_ACLDATA_PKT:
590 case HCI_COMMAND_PKT:
591 case HCI_SCODATA_PKT:
592 case HCI_3WIRE_LINK_PKT:
593 case HCI_3WIRE_ACK_PKT:
594 return true;
595 default:
596 return false;
597 }
598}
599
600static struct sk_buff *h5_prepare_pkt(struct hci_uart *hu, u8 pkt_type,
601 const u8 *data, size_t len)
602{
603 struct h5 *h5 = hu->priv;
604 struct sk_buff *nskb;
605 u8 hdr[4];
606 int i;
607
608 if (!valid_packet_type(pkt_type)) {
609 BT_ERR("Unknown packet type %u", pkt_type);
610 return NULL;
611 }
612
613 /*
614 * Max len of packet: (original len + 4 (H5 hdr) + 2 (crc)) * 2
615 * (because bytes 0xc0 and 0xdb are escaped, worst case is when
616 * the packet is all made of 0xc0 and 0xdb) + 2 (0xc0
617 * delimiters at start and end).
618 */
619 nskb = alloc_skb((len + 6) * 2 + 2, GFP_ATOMIC);
620 if (!nskb)
621 return NULL;
622
623 bt_cb(nskb)->pkt_type = pkt_type;
624
625 h5_slip_delim(nskb);
626
627 hdr[0] = h5->tx_ack << 3;
628 clear_bit(H5_TX_ACK_REQ, &h5->flags);
629
630 /* Reliable packet? */
631 if (pkt_type == HCI_ACLDATA_PKT || pkt_type == HCI_COMMAND_PKT) {
632 hdr[0] |= 1 << 7;
633 hdr[0] |= h5->tx_seq;
634 h5->tx_seq = (h5->tx_seq + 1) % 8;
635 }
636
637 hdr[1] = pkt_type | ((len & 0x0f) << 4);
638 hdr[2] = len >> 4;
639 hdr[3] = ~((hdr[0] + hdr[1] + hdr[2]) & 0xff);
640
641 BT_DBG("%s tx: seq %u ack %u crc %u rel %u type %u len %u",
642 hu->hdev->name, H5_HDR_SEQ(hdr), H5_HDR_ACK(hdr),
643 H5_HDR_CRC(hdr), H5_HDR_RELIABLE(hdr), H5_HDR_PKT_TYPE(hdr),
644 H5_HDR_LEN(hdr));
645
646 for (i = 0; i < 4; i++)
647 h5_slip_one_byte(nskb, hdr[i]);
648
649 for (i = 0; i < len; i++)
650 h5_slip_one_byte(nskb, data[i]);
651
652 h5_slip_delim(nskb);
653
654 return nskb;
655}
656
657static struct sk_buff *h5_dequeue(struct hci_uart *hu)
658{
659 struct h5 *h5 = hu->priv;
660 unsigned long flags;
661 struct sk_buff *skb, *nskb;
662
663 if (h5->sleep != H5_AWAKE) {
664 const unsigned char wakeup_req[] = { 0x05, 0xfa };
665
666 if (h5->sleep == H5_WAKING_UP)
667 return NULL;
668
669 h5->sleep = H5_WAKING_UP;
670 BT_DBG("Sending wakeup request");
671
672 mod_timer(&h5->timer, jiffies + HZ / 100);
673 return h5_prepare_pkt(hu, HCI_3WIRE_LINK_PKT, wakeup_req, 2);
674 }
675
676 if ((skb = skb_dequeue(&h5->unrel)) != NULL) {
677 nskb = h5_prepare_pkt(hu, bt_cb(skb)->pkt_type,
678 skb->data, skb->len);
679 if (nskb) {
680 kfree_skb(skb);
681 return nskb;
682 }
683
684 skb_queue_head(&h5->unrel, skb);
685 BT_ERR("Could not dequeue pkt because alloc_skb failed");
686 }
687
688 spin_lock_irqsave_nested(&h5->unack.lock, flags, SINGLE_DEPTH_NESTING);
689
690 if (h5->unack.qlen >= h5->tx_win)
691 goto unlock;
692
693 if ((skb = skb_dequeue(&h5->rel)) != NULL) {
694 nskb = h5_prepare_pkt(hu, bt_cb(skb)->pkt_type,
695 skb->data, skb->len);
696 if (nskb) {
697 __skb_queue_tail(&h5->unack, skb);
698 mod_timer(&h5->timer, jiffies + H5_ACK_TIMEOUT);
699 spin_unlock_irqrestore(&h5->unack.lock, flags);
700 return nskb;
701 }
702
703 skb_queue_head(&h5->rel, skb);
704 BT_ERR("Could not dequeue pkt because alloc_skb failed");
705 }
706
707unlock:
708 spin_unlock_irqrestore(&h5->unack.lock, flags);
709
710 if (test_bit(H5_TX_ACK_REQ, &h5->flags))
711 return h5_prepare_pkt(hu, HCI_3WIRE_ACK_PKT, NULL, 0);
712
713 return NULL;
714}
715
716static int h5_flush(struct hci_uart *hu)
717{
718 BT_DBG("hu %p", hu);
719 return 0;
720}
721
722static struct hci_uart_proto h5p = {
723 .id = HCI_UART_3WIRE,
724 .open = h5_open,
725 .close = h5_close,
726 .recv = h5_recv,
727 .enqueue = h5_enqueue,
728 .dequeue = h5_dequeue,
729 .flush = h5_flush,
730};
731
732int __init h5_init(void)
733{
734 int err = hci_uart_register_proto(&h5p);
735
736 if (!err)
737 BT_INFO("HCI Three-wire UART (H5) protocol initialized");
738 else
739 BT_ERR("HCI Three-wire UART (H5) protocol init failed");
740
741 return err;
742}
743
744int __exit h5_deinit(void)
745{
746 return hci_uart_unregister_proto(&h5p);
747}
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 2f9b796e106e..74e0966b3ead 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -156,6 +156,35 @@ restart:
156 return 0; 156 return 0;
157} 157}
158 158
159static void hci_uart_init_work(struct work_struct *work)
160{
161 struct hci_uart *hu = container_of(work, struct hci_uart, init_ready);
162 int err;
163
164 if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
165 return;
166
167 err = hci_register_dev(hu->hdev);
168 if (err < 0) {
169 BT_ERR("Can't register HCI device");
170 hci_free_dev(hu->hdev);
171 hu->hdev = NULL;
172 hu->proto->close(hu);
173 }
174
175 set_bit(HCI_UART_REGISTERED, &hu->flags);
176}
177
178int hci_uart_init_ready(struct hci_uart *hu)
179{
180 if (!test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
181 return -EALREADY;
182
183 schedule_work(&hu->init_ready);
184
185 return 0;
186}
187
159/* ------- Interface to HCI layer ------ */ 188/* ------- Interface to HCI layer ------ */
160/* Initialize device */ 189/* Initialize device */
161static int hci_uart_open(struct hci_dev *hdev) 190static int hci_uart_open(struct hci_dev *hdev)
@@ -264,6 +293,8 @@ static int hci_uart_tty_open(struct tty_struct *tty)
264 hu->tty = tty; 293 hu->tty = tty;
265 tty->receive_room = 65536; 294 tty->receive_room = 65536;
266 295
296 INIT_WORK(&hu->init_ready, hci_uart_init_work);
297
267 spin_lock_init(&hu->rx_lock); 298 spin_lock_init(&hu->rx_lock);
268 299
269 /* Flush any pending characters in the driver and line discipline. */ 300 /* Flush any pending characters in the driver and line discipline. */
@@ -286,28 +317,30 @@ static int hci_uart_tty_open(struct tty_struct *tty)
286static void hci_uart_tty_close(struct tty_struct *tty) 317static void hci_uart_tty_close(struct tty_struct *tty)
287{ 318{
288 struct hci_uart *hu = (void *)tty->disc_data; 319 struct hci_uart *hu = (void *)tty->disc_data;
320 struct hci_dev *hdev;
289 321
290 BT_DBG("tty %p", tty); 322 BT_DBG("tty %p", tty);
291 323
292 /* Detach from the tty */ 324 /* Detach from the tty */
293 tty->disc_data = NULL; 325 tty->disc_data = NULL;
294 326
295 if (hu) { 327 if (!hu)
296 struct hci_dev *hdev = hu->hdev; 328 return;
297 329
298 if (hdev) 330 hdev = hu->hdev;
299 hci_uart_close(hdev); 331 if (hdev)
332 hci_uart_close(hdev);
300 333
301 if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) { 334 if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) {
302 if (hdev) { 335 if (hdev) {
336 if (test_bit(HCI_UART_REGISTERED, &hu->flags))
303 hci_unregister_dev(hdev); 337 hci_unregister_dev(hdev);
304 hci_free_dev(hdev); 338 hci_free_dev(hdev);
305 }
306 hu->proto->close(hu);
307 } 339 }
308 340 hu->proto->close(hu);
309 kfree(hu);
310 } 341 }
342
343 kfree(hu);
311} 344}
312 345
313/* hci_uart_tty_wakeup() 346/* hci_uart_tty_wakeup()
@@ -401,12 +434,17 @@ static int hci_uart_register_dev(struct hci_uart *hu)
401 else 434 else
402 hdev->dev_type = HCI_BREDR; 435 hdev->dev_type = HCI_BREDR;
403 436
437 if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
438 return 0;
439
404 if (hci_register_dev(hdev) < 0) { 440 if (hci_register_dev(hdev) < 0) {
405 BT_ERR("Can't register HCI device"); 441 BT_ERR("Can't register HCI device");
406 hci_free_dev(hdev); 442 hci_free_dev(hdev);
407 return -ENODEV; 443 return -ENODEV;
408 } 444 }
409 445
446 set_bit(HCI_UART_REGISTERED, &hu->flags);
447
410 return 0; 448 return 0;
411} 449}
412 450
@@ -558,6 +596,9 @@ static int __init hci_uart_init(void)
558#ifdef CONFIG_BT_HCIUART_ATH3K 596#ifdef CONFIG_BT_HCIUART_ATH3K
559 ath_init(); 597 ath_init();
560#endif 598#endif
599#ifdef CONFIG_BT_HCIUART_3WIRE
600 h5_init();
601#endif
561 602
562 return 0; 603 return 0;
563} 604}
@@ -578,6 +619,9 @@ static void __exit hci_uart_exit(void)
578#ifdef CONFIG_BT_HCIUART_ATH3K 619#ifdef CONFIG_BT_HCIUART_ATH3K
579 ath_deinit(); 620 ath_deinit();
580#endif 621#endif
622#ifdef CONFIG_BT_HCIUART_3WIRE
623 h5_deinit();
624#endif
581 625
582 /* Release tty registration of line discipline */ 626 /* Release tty registration of line discipline */
583 if ((err = tty_unregister_ldisc(N_HCI))) 627 if ((err = tty_unregister_ldisc(N_HCI)))
diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h
index 6cf6ab22ad21..fffa61ff5cb1 100644
--- a/drivers/bluetooth/hci_uart.h
+++ b/drivers/bluetooth/hci_uart.h
@@ -47,6 +47,7 @@
47#define HCI_UART_RAW_DEVICE 0 47#define HCI_UART_RAW_DEVICE 0
48#define HCI_UART_RESET_ON_INIT 1 48#define HCI_UART_RESET_ON_INIT 1
49#define HCI_UART_CREATE_AMP 2 49#define HCI_UART_CREATE_AMP 2
50#define HCI_UART_INIT_PENDING 3
50 51
51struct hci_uart; 52struct hci_uart;
52 53
@@ -66,6 +67,8 @@ struct hci_uart {
66 unsigned long flags; 67 unsigned long flags;
67 unsigned long hdev_flags; 68 unsigned long hdev_flags;
68 69
70 struct work_struct init_ready;
71
69 struct hci_uart_proto *proto; 72 struct hci_uart_proto *proto;
70 void *priv; 73 void *priv;
71 74
@@ -76,6 +79,7 @@ struct hci_uart {
76 79
77/* HCI_UART proto flag bits */ 80/* HCI_UART proto flag bits */
78#define HCI_UART_PROTO_SET 0 81#define HCI_UART_PROTO_SET 0
82#define HCI_UART_REGISTERED 1
79 83
80/* TX states */ 84/* TX states */
81#define HCI_UART_SENDING 1 85#define HCI_UART_SENDING 1
@@ -84,6 +88,7 @@ struct hci_uart {
84int hci_uart_register_proto(struct hci_uart_proto *p); 88int hci_uart_register_proto(struct hci_uart_proto *p);
85int hci_uart_unregister_proto(struct hci_uart_proto *p); 89int hci_uart_unregister_proto(struct hci_uart_proto *p);
86int hci_uart_tx_wakeup(struct hci_uart *hu); 90int hci_uart_tx_wakeup(struct hci_uart *hu);
91int hci_uart_init_ready(struct hci_uart *hu);
87 92
88#ifdef CONFIG_BT_HCIUART_H4 93#ifdef CONFIG_BT_HCIUART_H4
89int h4_init(void); 94int h4_init(void);
@@ -104,3 +109,8 @@ int ll_deinit(void);
104int ath_init(void); 109int ath_init(void);
105int ath_deinit(void); 110int ath_deinit(void);
106#endif 111#endif
112
113#ifdef CONFIG_BT_HCIUART_3WIRE
114int h5_init(void);
115int h5_deinit(void);
116#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-29 05:08:20 -0500