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
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 #include "qemu-common.h"
24 #include "qemu-char.h"
25 #include "qemu-timer.h"
41 uint8_t outfifo[FIFO_LEN * 2];
42 uint8_t inpkt[FIFO_LEN];
53 /* H4+ packet types */
63 /* CSR41814 negotiation start magic packet */
64 static const uint8_t csrhci_neg_packet[] = {
66 0x00, 0xa0, 0x01, 0x00, 0x00,
67 0x4c, 0x00, 0x96, 0x00, 0x00,
70 /* CSR41814 vendor-specific command OCFs */
72 OCF_CSR_SEND_FIRMWARE = 0x000,
75 static inline void csrhci_fifo_wake(struct csrhci_s *s)
77 if (!s->enable || !s->out_len)
80 /* XXX: Should wait for s->modem_state & CHR_TIOCM_RTS? */
81 if (s->chr.chr_can_read && s->chr.chr_can_read(s->chr.handler_opaque) &&
83 s->chr.chr_read(s->chr.handler_opaque,
84 s->outfifo + s->out_start ++, 1);
86 if (s->out_start >= s->out_size) {
88 s->out_size = FIFO_LEN;
93 qemu_mod_timer(s->out_tm, qemu_get_clock(vm_clock) + s->baud_delay);
96 #define csrhci_out_packetz(s, len) memset(csrhci_out_packet(s, len), 0, len)
97 static uint8_t *csrhci_out_packet(struct csrhci_s *s, int len)
99 int off = s->out_start + s->out_len;
101 /* TODO: do the padding here, i.e. align len */
104 if (off < FIFO_LEN) {
105 if (off + len > FIFO_LEN && (s->out_size = off + len) > FIFO_LEN * 2) {
106 fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
109 return s->outfifo + off;
112 if (s->out_len > s->out_size) {
113 fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
117 return s->outfifo + off - s->out_size;
120 static inline uint8_t *csrhci_out_packet_csr(struct csrhci_s *s,
123 uint8_t *ret = csrhci_out_packetz(s, len + 2);
131 static inline uint8_t *csrhci_out_packet_event(struct csrhci_s *s,
134 uint8_t *ret = csrhci_out_packetz(s,
135 len + 1 + sizeof(struct hci_event_hdr));
137 *ret ++ = H4_EVT_PKT;
138 ((struct hci_event_hdr *) ret)->evt = evt;
139 ((struct hci_event_hdr *) ret)->plen = len;
141 return ret + sizeof(struct hci_event_hdr);
144 static void csrhci_in_packet_vendor(struct csrhci_s *s, int ocf,
145 uint8_t *data, int len)
151 case OCF_CSR_SEND_FIRMWARE:
152 /* Check if this is the bd_address packet */
153 if (len >= 18 + 8 && data[12] == 0x01 && data[13] == 0x00) {
155 s->bd_addr.b[0] = data[offset + 7]; /* Beyond cmd packet end(!?) */
156 s->bd_addr.b[1] = data[offset + 6];
157 s->bd_addr.b[2] = data[offset + 4];
158 s->bd_addr.b[3] = data[offset + 0];
159 s->bd_addr.b[4] = data[offset + 3];
160 s->bd_addr.b[5] = data[offset + 2];
162 s->hci->bdaddr_set(s->hci, s->bd_addr.b);
163 fprintf(stderr, "%s: bd_address loaded from firmware: "
164 "%02x:%02x:%02x:%02x:%02x:%02x\n", __FUNCTION__,
165 s->bd_addr.b[0], s->bd_addr.b[1], s->bd_addr.b[2],
166 s->bd_addr.b[3], s->bd_addr.b[4], s->bd_addr.b[5]);
169 rpkt = csrhci_out_packet_event(s, EVT_VENDOR, 11);
170 /* Status bytes: no error */
176 fprintf(stderr, "%s: got a bad CMD packet\n", __FUNCTION__);
183 static void csrhci_in_packet(struct csrhci_s *s, uint8_t *pkt)
190 opc = le16_to_cpu(((struct hci_command_hdr *) pkt)->opcode);
191 if (cmd_opcode_ogf(opc) == OGF_VENDOR_CMD) {
192 csrhci_in_packet_vendor(s, cmd_opcode_ocf(opc),
193 pkt + sizeof(struct hci_command_hdr),
194 s->in_len - sizeof(struct hci_command_hdr) - 1);
198 /* TODO: if the command is OCF_READ_LOCAL_COMMANDS or the likes,
199 * we need to send it to the HCI layer and then add our supported
200 * commands to the returned mask (such as OGF_VENDOR_CMD). With
201 * bt-hci.c we could just have hooks for this kind of commands but
202 * we can't with bt-host.c. */
204 s->hci->cmd_send(s->hci, pkt, s->in_len - 1);
211 s->hci->acl_send(s->hci, pkt, s->in_len - 1);
215 s->hci->sco_send(s->hci, pkt, s->in_len - 1);
219 if (s->in_hdr != sizeof(csrhci_neg_packet) ||
220 memcmp(pkt - 1, csrhci_neg_packet, s->in_hdr)) {
221 fprintf(stderr, "%s: got a bad NEG packet\n", __FUNCTION__);
226 rpkt = csrhci_out_packet_csr(s, H4_NEG_PKT, 10);
228 *rpkt ++ = 0x20; /* Operational settings negotation Ok */
229 memcpy(rpkt, pkt, 7); rpkt += 7;
235 if (s->in_hdr != 4 || pkt[1] != 0x55 || pkt[2] != 0x00) {
236 fprintf(stderr, "%s: got a bad ALIVE packet\n", __FUNCTION__);
240 rpkt = csrhci_out_packet_csr(s, H4_ALIVE_PKT, 2);
248 /* TODO: error out */
249 fprintf(stderr, "%s: got a bad packet\n", __FUNCTION__);
256 static int csrhci_header_len(const uint8_t *pkt)
260 return HCI_COMMAND_HDR_SIZE;
262 return HCI_EVENT_HDR_SIZE;
264 return HCI_ACL_HDR_SIZE;
266 return HCI_SCO_HDR_SIZE;
276 static int csrhci_data_len(const uint8_t *pkt)
280 /* It seems that vendor-specific command packets for H4+ are all
281 * one byte longer than indicated in the standard header. */
282 if (le16_to_cpu(((struct hci_command_hdr *) pkt)->opcode) == 0xfc00)
283 return (((struct hci_command_hdr *) pkt)->plen + 1) & ~1;
285 return ((struct hci_command_hdr *) pkt)->plen;
287 return ((struct hci_event_hdr *) pkt)->plen;
289 return le16_to_cpu(((struct hci_acl_hdr *) pkt)->dlen);
291 return ((struct hci_sco_hdr *) pkt)->dlen;
300 static int csrhci_write(struct CharDriverState *chr,
301 const uint8_t *buf, int len)
303 struct csrhci_s *s = (struct csrhci_s *) chr->opaque;
304 int plen = s->in_len;
310 memcpy(s->inpkt + plen, buf, len);
313 if (s->in_len >= 2 && plen < 2)
314 s->in_hdr = csrhci_header_len(s->inpkt) + 1;
316 if (s->in_len >= s->in_hdr && plen < s->in_hdr)
317 s->in_data = csrhci_data_len(s->inpkt) + s->in_hdr;
319 if (s->in_len >= s->in_data) {
320 csrhci_in_packet(s, s->inpkt);
322 memmove(s->inpkt, s->inpkt + s->in_len, s->in_len - s->in_data);
323 s->in_len -= s->in_data;
325 s->in_data = INT_MAX;
334 static void csrhci_out_hci_packet_event(void *opaque,
335 const uint8_t *data, int len)
337 struct csrhci_s *s = (struct csrhci_s *) opaque;
338 uint8_t *pkt = csrhci_out_packet(s, (len + 2) & ~1); /* Align */
340 *pkt ++ = H4_EVT_PKT;
341 memcpy(pkt, data, len);
346 static void csrhci_out_hci_packet_acl(void *opaque,
347 const uint8_t *data, int len)
349 struct csrhci_s *s = (struct csrhci_s *) opaque;
350 uint8_t *pkt = csrhci_out_packet(s, (len + 2) & ~1); /* Align */
352 *pkt ++ = H4_ACL_PKT;
354 memcpy(pkt, data, len);
359 static int csrhci_ioctl(struct CharDriverState *chr, int cmd, void *arg)
361 QEMUSerialSetParams *ssp;
362 struct csrhci_s *s = (struct csrhci_s *) chr->opaque;
363 int prev_state = s->modem_state;
366 case CHR_IOCTL_SERIAL_SET_PARAMS:
367 ssp = (QEMUSerialSetParams *) arg;
368 s->baud_delay = ticks_per_sec / ssp->speed;
369 /* Moments later... (but shorter than 100ms) */
370 s->modem_state |= CHR_TIOCM_CTS;
373 case CHR_IOCTL_SERIAL_GET_TIOCM:
374 *(int *) arg = s->modem_state;
377 case CHR_IOCTL_SERIAL_SET_TIOCM:
378 s->modem_state = *(int *) arg;
379 if (~s->modem_state & prev_state & CHR_TIOCM_RTS)
380 s->modem_state &= ~CHR_TIOCM_CTS;
389 static void csrhci_reset(struct csrhci_s *s)
392 s->out_size = FIFO_LEN;
394 s->baud_delay = ticks_per_sec;
397 s->in_data = INT_MAX;
400 /* After a while... (but sooner than 10ms) */
401 s->modem_state |= CHR_TIOCM_CTS;
403 memset(&s->bd_addr, 0, sizeof(bdaddr_t));
406 static void csrhci_out_tick(void *opaque)
408 csrhci_fifo_wake((struct csrhci_s *) opaque);
411 static void csrhci_pins(void *opaque, int line, int level)
413 struct csrhci_s *s = (struct csrhci_s *) opaque;
414 int state = s->pin_state;
416 s->pin_state &= ~(1 << line);
417 s->pin_state |= (!!level) << line;
419 if ((state & ~s->pin_state) & (1 << csrhci_pin_reset)) {
420 /* TODO: Disappear from lower layers */
424 if (s->pin_state == 3 && state != 3) {
426 /* TODO: Wake lower layers up */
430 qemu_irq *csrhci_pins_get(CharDriverState *chr)
432 struct csrhci_s *s = (struct csrhci_s *) chr->opaque;
437 CharDriverState *uart_hci_init(qemu_irq wakeup)
439 struct csrhci_s *s = (struct csrhci_s *)
440 qemu_mallocz(sizeof(struct csrhci_s));
443 s->chr.chr_write = csrhci_write;
444 s->chr.chr_ioctl = csrhci_ioctl;
446 s->hci = qemu_next_hci();
448 s->hci->evt_recv = csrhci_out_hci_packet_event;
449 s->hci->acl_recv = csrhci_out_hci_packet_acl;
451 s->out_tm = qemu_new_timer(vm_clock, csrhci_out_tick, s);
452 s->pins = qemu_allocate_irqs(csrhci_pins, s, __csrhci_pins);