root / hw / bt-hci-csr.c @ 927d4878
History | View | Annotate | Download (12 kB)
1 |
/*
|
---|---|
2 |
* Bluetooth serial HCI transport.
|
3 |
* CSR41814 HCI with H4p vendor extensions.
|
4 |
*
|
5 |
* Copyright (C) 2008 Andrzej Zaborowski <balrog@zabor.org>
|
6 |
*
|
7 |
* This program is free software; you can redistribute it and/or
|
8 |
* modify it under the terms of the GNU General Public License as
|
9 |
* published by the Free Software Foundation; either version 2 or
|
10 |
* (at your option) version 3 of the License.
|
11 |
*
|
12 |
* This program is distributed in the hope that it will be useful,
|
13 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
14 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
15 |
* GNU General Public License for more details.
|
16 |
*
|
17 |
* You should have received a copy of the GNU General Public License along
|
18 |
* with this program; if not, see <http://www.gnu.org/licenses/>.
|
19 |
*/
|
20 |
|
21 |
#include "qemu-common.h" |
22 |
#include "char/char.h" |
23 |
#include "qemu/timer.h" |
24 |
#include "irq.h" |
25 |
#include "bt/bt.h" |
26 |
#include "bt.h" |
27 |
|
28 |
struct csrhci_s {
|
29 |
int enable;
|
30 |
qemu_irq *pins; |
31 |
int pin_state;
|
32 |
int modem_state;
|
33 |
CharDriverState chr; |
34 |
#define FIFO_LEN 4096 |
35 |
int out_start;
|
36 |
int out_len;
|
37 |
int out_size;
|
38 |
uint8_t outfifo[FIFO_LEN * 2];
|
39 |
uint8_t inpkt[FIFO_LEN]; |
40 |
int in_len;
|
41 |
int in_hdr;
|
42 |
int in_data;
|
43 |
QEMUTimer *out_tm; |
44 |
int64_t baud_delay; |
45 |
|
46 |
bdaddr_t bd_addr; |
47 |
struct HCIInfo *hci;
|
48 |
}; |
49 |
|
50 |
/* H4+ packet types */
|
51 |
enum {
|
52 |
H4_CMD_PKT = 1,
|
53 |
H4_ACL_PKT = 2,
|
54 |
H4_SCO_PKT = 3,
|
55 |
H4_EVT_PKT = 4,
|
56 |
H4_NEG_PKT = 6,
|
57 |
H4_ALIVE_PKT = 7,
|
58 |
}; |
59 |
|
60 |
/* CSR41814 negotiation start magic packet */
|
61 |
static const uint8_t csrhci_neg_packet[] = { |
62 |
H4_NEG_PKT, 10,
|
63 |
0x00, 0xa0, 0x01, 0x00, 0x00, |
64 |
0x4c, 0x00, 0x96, 0x00, 0x00, |
65 |
}; |
66 |
|
67 |
/* CSR41814 vendor-specific command OCFs */
|
68 |
enum {
|
69 |
OCF_CSR_SEND_FIRMWARE = 0x000,
|
70 |
}; |
71 |
|
72 |
static inline void csrhci_fifo_wake(struct csrhci_s *s) |
73 |
{ |
74 |
if (!s->enable || !s->out_len)
|
75 |
return;
|
76 |
|
77 |
/* XXX: Should wait for s->modem_state & CHR_TIOCM_RTS? */
|
78 |
if (s->chr.chr_can_read && s->chr.chr_can_read(s->chr.handler_opaque) &&
|
79 |
s->chr.chr_read) { |
80 |
s->chr.chr_read(s->chr.handler_opaque, |
81 |
s->outfifo + s->out_start ++, 1);
|
82 |
s->out_len --; |
83 |
if (s->out_start >= s->out_size) {
|
84 |
s->out_start = 0;
|
85 |
s->out_size = FIFO_LEN; |
86 |
} |
87 |
} |
88 |
|
89 |
if (s->out_len)
|
90 |
qemu_mod_timer(s->out_tm, qemu_get_clock_ns(vm_clock) + s->baud_delay); |
91 |
} |
92 |
|
93 |
#define csrhci_out_packetz(s, len) memset(csrhci_out_packet(s, len), 0, len) |
94 |
static uint8_t *csrhci_out_packet(struct csrhci_s *s, int len) |
95 |
{ |
96 |
int off = s->out_start + s->out_len;
|
97 |
|
98 |
/* TODO: do the padding here, i.e. align len */
|
99 |
s->out_len += len; |
100 |
|
101 |
if (off < FIFO_LEN) {
|
102 |
if (off + len > FIFO_LEN && (s->out_size = off + len) > FIFO_LEN * 2) { |
103 |
fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
|
104 |
exit(-1);
|
105 |
} |
106 |
return s->outfifo + off;
|
107 |
} |
108 |
|
109 |
if (s->out_len > s->out_size) {
|
110 |
fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
|
111 |
exit(-1);
|
112 |
} |
113 |
|
114 |
return s->outfifo + off - s->out_size;
|
115 |
} |
116 |
|
117 |
static inline uint8_t *csrhci_out_packet_csr(struct csrhci_s *s, |
118 |
int type, int len) |
119 |
{ |
120 |
uint8_t *ret = csrhci_out_packetz(s, len + 2);
|
121 |
|
122 |
*ret ++ = type; |
123 |
*ret ++ = len; |
124 |
|
125 |
return ret;
|
126 |
} |
127 |
|
128 |
static inline uint8_t *csrhci_out_packet_event(struct csrhci_s *s, |
129 |
int evt, int len) |
130 |
{ |
131 |
uint8_t *ret = csrhci_out_packetz(s, |
132 |
len + 1 + sizeof(struct hci_event_hdr)); |
133 |
|
134 |
*ret ++ = H4_EVT_PKT; |
135 |
((struct hci_event_hdr *) ret)->evt = evt;
|
136 |
((struct hci_event_hdr *) ret)->plen = len;
|
137 |
|
138 |
return ret + sizeof(struct hci_event_hdr); |
139 |
} |
140 |
|
141 |
static void csrhci_in_packet_vendor(struct csrhci_s *s, int ocf, |
142 |
uint8_t *data, int len)
|
143 |
{ |
144 |
int offset;
|
145 |
uint8_t *rpkt; |
146 |
|
147 |
switch (ocf) {
|
148 |
case OCF_CSR_SEND_FIRMWARE:
|
149 |
/* Check if this is the bd_address packet */
|
150 |
if (len >= 18 + 8 && data[12] == 0x01 && data[13] == 0x00) { |
151 |
offset = 18;
|
152 |
s->bd_addr.b[0] = data[offset + 7]; /* Beyond cmd packet end(!?) */ |
153 |
s->bd_addr.b[1] = data[offset + 6]; |
154 |
s->bd_addr.b[2] = data[offset + 4]; |
155 |
s->bd_addr.b[3] = data[offset + 0]; |
156 |
s->bd_addr.b[4] = data[offset + 3]; |
157 |
s->bd_addr.b[5] = data[offset + 2]; |
158 |
|
159 |
s->hci->bdaddr_set(s->hci, s->bd_addr.b); |
160 |
fprintf(stderr, "%s: bd_address loaded from firmware: "
|
161 |
"%02x:%02x:%02x:%02x:%02x:%02x\n", __FUNCTION__,
|
162 |
s->bd_addr.b[0], s->bd_addr.b[1], s->bd_addr.b[2], |
163 |
s->bd_addr.b[3], s->bd_addr.b[4], s->bd_addr.b[5]); |
164 |
} |
165 |
|
166 |
rpkt = csrhci_out_packet_event(s, EVT_VENDOR, 11);
|
167 |
/* Status bytes: no error */
|
168 |
rpkt[9] = 0x00; |
169 |
rpkt[10] = 0x00; |
170 |
break;
|
171 |
|
172 |
default:
|
173 |
fprintf(stderr, "%s: got a bad CMD packet\n", __FUNCTION__);
|
174 |
return;
|
175 |
} |
176 |
|
177 |
csrhci_fifo_wake(s); |
178 |
} |
179 |
|
180 |
static void csrhci_in_packet(struct csrhci_s *s, uint8_t *pkt) |
181 |
{ |
182 |
uint8_t *rpkt; |
183 |
int opc;
|
184 |
|
185 |
switch (*pkt ++) {
|
186 |
case H4_CMD_PKT:
|
187 |
opc = le16_to_cpu(((struct hci_command_hdr *) pkt)->opcode);
|
188 |
if (cmd_opcode_ogf(opc) == OGF_VENDOR_CMD) {
|
189 |
csrhci_in_packet_vendor(s, cmd_opcode_ocf(opc), |
190 |
pkt + sizeof(struct hci_command_hdr), |
191 |
s->in_len - sizeof(struct hci_command_hdr) - 1); |
192 |
return;
|
193 |
} |
194 |
|
195 |
/* TODO: if the command is OCF_READ_LOCAL_COMMANDS or the likes,
|
196 |
* we need to send it to the HCI layer and then add our supported
|
197 |
* commands to the returned mask (such as OGF_VENDOR_CMD). With
|
198 |
* bt-hci.c we could just have hooks for this kind of commands but
|
199 |
* we can't with bt-host.c. */
|
200 |
|
201 |
s->hci->cmd_send(s->hci, pkt, s->in_len - 1);
|
202 |
break;
|
203 |
|
204 |
case H4_EVT_PKT:
|
205 |
goto bad_pkt;
|
206 |
|
207 |
case H4_ACL_PKT:
|
208 |
s->hci->acl_send(s->hci, pkt, s->in_len - 1);
|
209 |
break;
|
210 |
|
211 |
case H4_SCO_PKT:
|
212 |
s->hci->sco_send(s->hci, pkt, s->in_len - 1);
|
213 |
break;
|
214 |
|
215 |
case H4_NEG_PKT:
|
216 |
if (s->in_hdr != sizeof(csrhci_neg_packet) || |
217 |
memcmp(pkt - 1, csrhci_neg_packet, s->in_hdr)) {
|
218 |
fprintf(stderr, "%s: got a bad NEG packet\n", __FUNCTION__);
|
219 |
return;
|
220 |
} |
221 |
pkt += 2;
|
222 |
|
223 |
rpkt = csrhci_out_packet_csr(s, H4_NEG_PKT, 10);
|
224 |
|
225 |
*rpkt ++ = 0x20; /* Operational settings negotiation Ok */ |
226 |
memcpy(rpkt, pkt, 7); rpkt += 7; |
227 |
*rpkt ++ = 0xff;
|
228 |
*rpkt = 0xff;
|
229 |
break;
|
230 |
|
231 |
case H4_ALIVE_PKT:
|
232 |
if (s->in_hdr != 4 || pkt[1] != 0x55 || pkt[2] != 0x00) { |
233 |
fprintf(stderr, "%s: got a bad ALIVE packet\n", __FUNCTION__);
|
234 |
return;
|
235 |
} |
236 |
|
237 |
rpkt = csrhci_out_packet_csr(s, H4_ALIVE_PKT, 2);
|
238 |
|
239 |
*rpkt ++ = 0xcc;
|
240 |
*rpkt = 0x00;
|
241 |
break;
|
242 |
|
243 |
default:
|
244 |
bad_pkt:
|
245 |
/* TODO: error out */
|
246 |
fprintf(stderr, "%s: got a bad packet\n", __FUNCTION__);
|
247 |
break;
|
248 |
} |
249 |
|
250 |
csrhci_fifo_wake(s); |
251 |
} |
252 |
|
253 |
static int csrhci_header_len(const uint8_t *pkt) |
254 |
{ |
255 |
switch (pkt[0]) { |
256 |
case H4_CMD_PKT:
|
257 |
return HCI_COMMAND_HDR_SIZE;
|
258 |
case H4_EVT_PKT:
|
259 |
return HCI_EVENT_HDR_SIZE;
|
260 |
case H4_ACL_PKT:
|
261 |
return HCI_ACL_HDR_SIZE;
|
262 |
case H4_SCO_PKT:
|
263 |
return HCI_SCO_HDR_SIZE;
|
264 |
case H4_NEG_PKT:
|
265 |
return pkt[1] + 1; |
266 |
case H4_ALIVE_PKT:
|
267 |
return 3; |
268 |
} |
269 |
|
270 |
exit(-1);
|
271 |
} |
272 |
|
273 |
static int csrhci_data_len(const uint8_t *pkt) |
274 |
{ |
275 |
switch (*pkt ++) {
|
276 |
case H4_CMD_PKT:
|
277 |
/* It seems that vendor-specific command packets for H4+ are all
|
278 |
* one byte longer than indicated in the standard header. */
|
279 |
if (le16_to_cpu(((struct hci_command_hdr *) pkt)->opcode) == 0xfc00) |
280 |
return (((struct hci_command_hdr *) pkt)->plen + 1) & ~1; |
281 |
|
282 |
return ((struct hci_command_hdr *) pkt)->plen; |
283 |
case H4_EVT_PKT:
|
284 |
return ((struct hci_event_hdr *) pkt)->plen; |
285 |
case H4_ACL_PKT:
|
286 |
return le16_to_cpu(((struct hci_acl_hdr *) pkt)->dlen); |
287 |
case H4_SCO_PKT:
|
288 |
return ((struct hci_sco_hdr *) pkt)->dlen; |
289 |
case H4_NEG_PKT:
|
290 |
case H4_ALIVE_PKT:
|
291 |
return 0; |
292 |
} |
293 |
|
294 |
exit(-1);
|
295 |
} |
296 |
|
297 |
static int csrhci_write(struct CharDriverState *chr, |
298 |
const uint8_t *buf, int len) |
299 |
{ |
300 |
struct csrhci_s *s = (struct csrhci_s *) chr->opaque; |
301 |
int plen = s->in_len;
|
302 |
|
303 |
if (!s->enable)
|
304 |
return 0; |
305 |
|
306 |
s->in_len += len; |
307 |
memcpy(s->inpkt + plen, buf, len); |
308 |
|
309 |
while (1) { |
310 |
if (s->in_len >= 2 && plen < 2) |
311 |
s->in_hdr = csrhci_header_len(s->inpkt) + 1;
|
312 |
|
313 |
if (s->in_len >= s->in_hdr && plen < s->in_hdr)
|
314 |
s->in_data = csrhci_data_len(s->inpkt) + s->in_hdr; |
315 |
|
316 |
if (s->in_len >= s->in_data) {
|
317 |
csrhci_in_packet(s, s->inpkt); |
318 |
|
319 |
memmove(s->inpkt, s->inpkt + s->in_len, s->in_len - s->in_data); |
320 |
s->in_len -= s->in_data; |
321 |
s->in_hdr = INT_MAX; |
322 |
s->in_data = INT_MAX; |
323 |
plen = 0;
|
324 |
} else
|
325 |
break;
|
326 |
} |
327 |
|
328 |
return len;
|
329 |
} |
330 |
|
331 |
static void csrhci_out_hci_packet_event(void *opaque, |
332 |
const uint8_t *data, int len) |
333 |
{ |
334 |
struct csrhci_s *s = (struct csrhci_s *) opaque; |
335 |
uint8_t *pkt = csrhci_out_packet(s, (len + 2) & ~1); /* Align */ |
336 |
|
337 |
*pkt ++ = H4_EVT_PKT; |
338 |
memcpy(pkt, data, len); |
339 |
|
340 |
csrhci_fifo_wake(s); |
341 |
} |
342 |
|
343 |
static void csrhci_out_hci_packet_acl(void *opaque, |
344 |
const uint8_t *data, int len) |
345 |
{ |
346 |
struct csrhci_s *s = (struct csrhci_s *) opaque; |
347 |
uint8_t *pkt = csrhci_out_packet(s, (len + 2) & ~1); /* Align */ |
348 |
|
349 |
*pkt ++ = H4_ACL_PKT; |
350 |
pkt[len & ~1] = 0; |
351 |
memcpy(pkt, data, len); |
352 |
|
353 |
csrhci_fifo_wake(s); |
354 |
} |
355 |
|
356 |
static int csrhci_ioctl(struct CharDriverState *chr, int cmd, void *arg) |
357 |
{ |
358 |
QEMUSerialSetParams *ssp; |
359 |
struct csrhci_s *s = (struct csrhci_s *) chr->opaque; |
360 |
int prev_state = s->modem_state;
|
361 |
|
362 |
switch (cmd) {
|
363 |
case CHR_IOCTL_SERIAL_SET_PARAMS:
|
364 |
ssp = (QEMUSerialSetParams *) arg; |
365 |
s->baud_delay = get_ticks_per_sec() / ssp->speed; |
366 |
/* Moments later... (but shorter than 100ms) */
|
367 |
s->modem_state |= CHR_TIOCM_CTS; |
368 |
break;
|
369 |
|
370 |
case CHR_IOCTL_SERIAL_GET_TIOCM:
|
371 |
*(int *) arg = s->modem_state;
|
372 |
break;
|
373 |
|
374 |
case CHR_IOCTL_SERIAL_SET_TIOCM:
|
375 |
s->modem_state = *(int *) arg;
|
376 |
if (~s->modem_state & prev_state & CHR_TIOCM_RTS)
|
377 |
s->modem_state &= ~CHR_TIOCM_CTS; |
378 |
break;
|
379 |
|
380 |
default:
|
381 |
return -ENOTSUP;
|
382 |
} |
383 |
return 0; |
384 |
} |
385 |
|
386 |
static void csrhci_reset(struct csrhci_s *s) |
387 |
{ |
388 |
s->out_len = 0;
|
389 |
s->out_size = FIFO_LEN; |
390 |
s->in_len = 0;
|
391 |
s->baud_delay = get_ticks_per_sec(); |
392 |
s->enable = 0;
|
393 |
s->in_hdr = INT_MAX; |
394 |
s->in_data = INT_MAX; |
395 |
|
396 |
s->modem_state = 0;
|
397 |
/* After a while... (but sooner than 10ms) */
|
398 |
s->modem_state |= CHR_TIOCM_CTS; |
399 |
|
400 |
memset(&s->bd_addr, 0, sizeof(bdaddr_t)); |
401 |
} |
402 |
|
403 |
static void csrhci_out_tick(void *opaque) |
404 |
{ |
405 |
csrhci_fifo_wake((struct csrhci_s *) opaque);
|
406 |
} |
407 |
|
408 |
static void csrhci_pins(void *opaque, int line, int level) |
409 |
{ |
410 |
struct csrhci_s *s = (struct csrhci_s *) opaque; |
411 |
int state = s->pin_state;
|
412 |
|
413 |
s->pin_state &= ~(1 << line);
|
414 |
s->pin_state |= (!!level) << line; |
415 |
|
416 |
if ((state & ~s->pin_state) & (1 << csrhci_pin_reset)) { |
417 |
/* TODO: Disappear from lower layers */
|
418 |
csrhci_reset(s); |
419 |
} |
420 |
|
421 |
if (s->pin_state == 3 && state != 3) { |
422 |
s->enable = 1;
|
423 |
/* TODO: Wake lower layers up */
|
424 |
} |
425 |
} |
426 |
|
427 |
qemu_irq *csrhci_pins_get(CharDriverState *chr) |
428 |
{ |
429 |
struct csrhci_s *s = (struct csrhci_s *) chr->opaque; |
430 |
|
431 |
return s->pins;
|
432 |
} |
433 |
|
434 |
CharDriverState *uart_hci_init(qemu_irq wakeup) |
435 |
{ |
436 |
struct csrhci_s *s = (struct csrhci_s *) |
437 |
g_malloc0(sizeof(struct csrhci_s)); |
438 |
|
439 |
s->chr.opaque = s; |
440 |
s->chr.chr_write = csrhci_write; |
441 |
s->chr.chr_ioctl = csrhci_ioctl; |
442 |
|
443 |
s->hci = qemu_next_hci(); |
444 |
s->hci->opaque = s; |
445 |
s->hci->evt_recv = csrhci_out_hci_packet_event; |
446 |
s->hci->acl_recv = csrhci_out_hci_packet_acl; |
447 |
|
448 |
s->out_tm = qemu_new_timer_ns(vm_clock, csrhci_out_tick, s); |
449 |
s->pins = qemu_allocate_irqs(csrhci_pins, s, __csrhci_pins); |
450 |
csrhci_reset(s); |
451 |
|
452 |
return &s->chr;
|
453 |
} |