2 * Bluetooth serial HCI transport.
3 * CSR41814 HCI with H4p vendor extensions.
5 * Copyright (C) 2008 Andrzej Zaborowski <balrog@zabor.org>
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.
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.
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/>.
21 #include "qemu/osdep.h"
22 #include "qemu-common.h"
23 #include "sysemu/char.h"
24 #include "qemu/timer.h"
25 #include "qemu/bswap.h"
27 #include "sysemu/bt.h"
40 uint8_t outfifo[FIFO_LEN * 2];
41 uint8_t inpkt[FIFO_LEN];
57 /* H4+ packet types */
67 /* CSR41814 negotiation start magic packet */
68 static const uint8_t csrhci_neg_packet[] = {
70 0x00, 0xa0, 0x01, 0x00, 0x00,
71 0x4c, 0x00, 0x96, 0x00, 0x00,
74 /* CSR41814 vendor-specific command OCFs */
76 OCF_CSR_SEND_FIRMWARE = 0x000,
79 static inline void csrhci_fifo_wake(struct csrhci_s *s)
81 CharBackend *be = s->chr.be;
83 if (!s->enable || !s->out_len)
86 /* XXX: Should wait for s->modem_state & CHR_TIOCM_RTS? */
87 if (be && be->chr_can_read && be->chr_can_read(be->opaque) &&
89 be->chr_read(be->opaque,
90 s->outfifo + s->out_start++, 1);
92 if (s->out_start >= s->out_size) {
94 s->out_size = FIFO_LEN;
99 timer_mod(s->out_tm, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->baud_delay);
102 #define csrhci_out_packetz(s, len) memset(csrhci_out_packet(s, len), 0, len)
103 static uint8_t *csrhci_out_packet(struct csrhci_s *s, int len)
105 int off = s->out_start + s->out_len;
107 /* TODO: do the padding here, i.e. align len */
110 if (off < FIFO_LEN) {
111 if (off + len > FIFO_LEN && (s->out_size = off + len) > FIFO_LEN * 2) {
112 fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
115 return s->outfifo + off;
118 if (s->out_len > s->out_size) {
119 fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
123 return s->outfifo + off - s->out_size;
126 static inline uint8_t *csrhci_out_packet_csr(struct csrhci_s *s,
129 uint8_t *ret = csrhci_out_packetz(s, len + 2);
137 static inline uint8_t *csrhci_out_packet_event(struct csrhci_s *s,
140 uint8_t *ret = csrhci_out_packetz(s,
141 len + 1 + sizeof(struct hci_event_hdr));
143 *ret ++ = H4_EVT_PKT;
144 ((struct hci_event_hdr *) ret)->evt = evt;
145 ((struct hci_event_hdr *) ret)->plen = len;
147 return ret + sizeof(struct hci_event_hdr);
150 static void csrhci_in_packet_vendor(struct csrhci_s *s, int ocf,
151 uint8_t *data, int len)
157 case OCF_CSR_SEND_FIRMWARE:
158 /* Check if this is the bd_address packet */
159 if (len >= 18 + 8 && data[12] == 0x01 && data[13] == 0x00) {
161 s->bd_addr.b[0] = data[offset + 7]; /* Beyond cmd packet end(!?) */
162 s->bd_addr.b[1] = data[offset + 6];
163 s->bd_addr.b[2] = data[offset + 4];
164 s->bd_addr.b[3] = data[offset + 0];
165 s->bd_addr.b[4] = data[offset + 3];
166 s->bd_addr.b[5] = data[offset + 2];
168 s->hci->bdaddr_set(s->hci, s->bd_addr.b);
169 fprintf(stderr, "%s: bd_address loaded from firmware: "
170 "%02x:%02x:%02x:%02x:%02x:%02x\n", __FUNCTION__,
171 s->bd_addr.b[0], s->bd_addr.b[1], s->bd_addr.b[2],
172 s->bd_addr.b[3], s->bd_addr.b[4], s->bd_addr.b[5]);
175 rpkt = csrhci_out_packet_event(s, EVT_VENDOR, 11);
176 /* Status bytes: no error */
182 fprintf(stderr, "%s: got a bad CMD packet\n", __FUNCTION__);
189 static void csrhci_in_packet(struct csrhci_s *s, uint8_t *pkt)
196 opc = le16_to_cpu(((struct hci_command_hdr *) pkt)->opcode);
197 if (cmd_opcode_ogf(opc) == OGF_VENDOR_CMD) {
198 csrhci_in_packet_vendor(s, cmd_opcode_ocf(opc),
199 pkt + sizeof(struct hci_command_hdr),
200 s->in_len - sizeof(struct hci_command_hdr) - 1);
204 /* TODO: if the command is OCF_READ_LOCAL_COMMANDS or the likes,
205 * we need to send it to the HCI layer and then add our supported
206 * commands to the returned mask (such as OGF_VENDOR_CMD). With
207 * bt-hci.c we could just have hooks for this kind of commands but
208 * we can't with bt-host.c. */
210 s->hci->cmd_send(s->hci, pkt, s->in_len - 1);
217 s->hci->acl_send(s->hci, pkt, s->in_len - 1);
221 s->hci->sco_send(s->hci, pkt, s->in_len - 1);
225 if (s->in_hdr != sizeof(csrhci_neg_packet) ||
226 memcmp(pkt - 1, csrhci_neg_packet, s->in_hdr)) {
227 fprintf(stderr, "%s: got a bad NEG packet\n", __FUNCTION__);
232 rpkt = csrhci_out_packet_csr(s, H4_NEG_PKT, 10);
234 *rpkt ++ = 0x20; /* Operational settings negotiation Ok */
235 memcpy(rpkt, pkt, 7); rpkt += 7;
241 if (s->in_hdr != 4 || pkt[1] != 0x55 || pkt[2] != 0x00) {
242 fprintf(stderr, "%s: got a bad ALIVE packet\n", __FUNCTION__);
246 rpkt = csrhci_out_packet_csr(s, H4_ALIVE_PKT, 2);
254 /* TODO: error out */
255 fprintf(stderr, "%s: got a bad packet\n", __FUNCTION__);
262 static int csrhci_header_len(const uint8_t *pkt)
266 return HCI_COMMAND_HDR_SIZE;
268 return HCI_EVENT_HDR_SIZE;
270 return HCI_ACL_HDR_SIZE;
272 return HCI_SCO_HDR_SIZE;
282 static int csrhci_data_len(const uint8_t *pkt)
286 /* It seems that vendor-specific command packets for H4+ are all
287 * one byte longer than indicated in the standard header. */
288 if (le16_to_cpu(((struct hci_command_hdr *) pkt)->opcode) == 0xfc00)
289 return (((struct hci_command_hdr *) pkt)->plen + 1) & ~1;
291 return ((struct hci_command_hdr *) pkt)->plen;
293 return ((struct hci_event_hdr *) pkt)->plen;
295 return le16_to_cpu(((struct hci_acl_hdr *) pkt)->dlen);
297 return ((struct hci_sco_hdr *) pkt)->dlen;
306 static void csrhci_ready_for_next_inpkt(struct csrhci_s *s)
308 s->in_state = CSR_HDR_LEN;
314 static int csrhci_write(struct CharDriverState *chr,
315 const uint8_t *buf, int len)
317 struct csrhci_s *s = (struct csrhci_s *) chr->opaque;
324 int cnt = MIN(len, s->in_needed - s->in_len);
326 memcpy(s->inpkt + s->in_len, buf, cnt);
333 if (s->in_len < s->in_needed) {
337 if (s->in_state == CSR_HDR_LEN) {
338 s->in_hdr = csrhci_header_len(s->inpkt) + 1;
339 assert(s->in_hdr >= s->in_needed);
340 s->in_needed = s->in_hdr;
341 s->in_state = CSR_DATA_LEN;
345 if (s->in_state == CSR_DATA_LEN) {
346 s->in_needed += csrhci_data_len(s->inpkt);
347 /* hci_acl_hdr could specify more than 4096 bytes, so assert. */
348 assert(s->in_needed <= sizeof(s->inpkt));
349 s->in_state = CSR_DATA;
353 if (s->in_state == CSR_DATA) {
354 csrhci_in_packet(s, s->inpkt);
355 csrhci_ready_for_next_inpkt(s);
362 static void csrhci_out_hci_packet_event(void *opaque,
363 const uint8_t *data, int len)
365 struct csrhci_s *s = (struct csrhci_s *) opaque;
366 uint8_t *pkt = csrhci_out_packet(s, (len + 2) & ~1); /* Align */
368 *pkt ++ = H4_EVT_PKT;
369 memcpy(pkt, data, len);
374 static void csrhci_out_hci_packet_acl(void *opaque,
375 const uint8_t *data, int len)
377 struct csrhci_s *s = (struct csrhci_s *) opaque;
378 uint8_t *pkt = csrhci_out_packet(s, (len + 2) & ~1); /* Align */
380 *pkt ++ = H4_ACL_PKT;
382 memcpy(pkt, data, len);
387 static int csrhci_ioctl(struct CharDriverState *chr, int cmd, void *arg)
389 QEMUSerialSetParams *ssp;
390 struct csrhci_s *s = (struct csrhci_s *) chr->opaque;
391 int prev_state = s->modem_state;
394 case CHR_IOCTL_SERIAL_SET_PARAMS:
395 ssp = (QEMUSerialSetParams *) arg;
396 s->baud_delay = NANOSECONDS_PER_SECOND / ssp->speed;
397 /* Moments later... (but shorter than 100ms) */
398 s->modem_state |= CHR_TIOCM_CTS;
401 case CHR_IOCTL_SERIAL_GET_TIOCM:
402 *(int *) arg = s->modem_state;
405 case CHR_IOCTL_SERIAL_SET_TIOCM:
406 s->modem_state = *(int *) arg;
407 if (~s->modem_state & prev_state & CHR_TIOCM_RTS)
408 s->modem_state &= ~CHR_TIOCM_CTS;
417 static void csrhci_reset(struct csrhci_s *s)
420 s->out_size = FIFO_LEN;
421 csrhci_ready_for_next_inpkt(s);
422 s->baud_delay = NANOSECONDS_PER_SECOND;
426 /* After a while... (but sooner than 10ms) */
427 s->modem_state |= CHR_TIOCM_CTS;
429 memset(&s->bd_addr, 0, sizeof(bdaddr_t));
432 static void csrhci_out_tick(void *opaque)
434 csrhci_fifo_wake((struct csrhci_s *) opaque);
437 static void csrhci_pins(void *opaque, int line, int level)
439 struct csrhci_s *s = (struct csrhci_s *) opaque;
440 int state = s->pin_state;
442 s->pin_state &= ~(1 << line);
443 s->pin_state |= (!!level) << line;
445 if ((state & ~s->pin_state) & (1 << csrhci_pin_reset)) {
446 /* TODO: Disappear from lower layers */
450 if (s->pin_state == 3 && state != 3) {
452 /* TODO: Wake lower layers up */
456 qemu_irq *csrhci_pins_get(CharDriverState *chr)
458 struct csrhci_s *s = (struct csrhci_s *) chr->opaque;
463 CharDriverState *uart_hci_init(void)
465 struct csrhci_s *s = (struct csrhci_s *)
466 g_malloc0(sizeof(struct csrhci_s));
469 s->chr.chr_write = csrhci_write;
470 s->chr.chr_ioctl = csrhci_ioctl;
472 s->hci = qemu_next_hci();
474 s->hci->evt_recv = csrhci_out_hci_packet_event;
475 s->hci->acl_recv = csrhci_out_hci_packet_acl;
477 s->out_tm = timer_new_ns(QEMU_CLOCK_VIRTUAL, csrhci_out_tick, s);
478 s->pins = qemu_allocate_irqs(csrhci_pins, s, __csrhci_pins);