David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 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 |
David Turner | a253513 | 2010-09-10 10:15:07 +0200 | [diff] [blame] | 18 | * with this program; if not, see <http://www.gnu.org/licenses/>. |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 19 | */ |
| 20 | |
| 21 | #include "qemu-common.h" |
| 22 | #include "qemu-char.h" |
| 23 | #include "qemu-timer.h" |
| 24 | #include "irq.h" |
| 25 | #include "sysemu.h" |
| 26 | #include "net.h" |
| 27 | #include "bt.h" |
| 28 | |
| 29 | struct csrhci_s { |
| 30 | int enable; |
| 31 | qemu_irq *pins; |
| 32 | int pin_state; |
| 33 | int modem_state; |
| 34 | CharDriverState chr; |
| 35 | #define FIFO_LEN 4096 |
| 36 | int out_start; |
| 37 | int out_len; |
| 38 | int out_size; |
| 39 | uint8_t outfifo[FIFO_LEN * 2]; |
| 40 | uint8_t inpkt[FIFO_LEN]; |
| 41 | int in_len; |
| 42 | int in_hdr; |
| 43 | int in_data; |
| 44 | QEMUTimer *out_tm; |
| 45 | int64_t baud_delay; |
| 46 | |
| 47 | bdaddr_t bd_addr; |
| 48 | struct HCIInfo *hci; |
| 49 | }; |
| 50 | |
| 51 | /* H4+ packet types */ |
| 52 | enum { |
| 53 | H4_CMD_PKT = 1, |
| 54 | H4_ACL_PKT = 2, |
| 55 | H4_SCO_PKT = 3, |
| 56 | H4_EVT_PKT = 4, |
| 57 | H4_NEG_PKT = 6, |
| 58 | H4_ALIVE_PKT = 7, |
| 59 | }; |
| 60 | |
| 61 | /* CSR41814 negotiation start magic packet */ |
| 62 | static const uint8_t csrhci_neg_packet[] = { |
| 63 | H4_NEG_PKT, 10, |
| 64 | 0x00, 0xa0, 0x01, 0x00, 0x00, |
| 65 | 0x4c, 0x00, 0x96, 0x00, 0x00, |
| 66 | }; |
| 67 | |
| 68 | /* CSR41814 vendor-specific command OCFs */ |
| 69 | enum { |
| 70 | OCF_CSR_SEND_FIRMWARE = 0x000, |
| 71 | }; |
| 72 | |
| 73 | static inline void csrhci_fifo_wake(struct csrhci_s *s) |
| 74 | { |
| 75 | if (!s->enable || !s->out_len) |
| 76 | return; |
| 77 | |
| 78 | /* XXX: Should wait for s->modem_state & CHR_TIOCM_RTS? */ |
| 79 | if (s->chr.chr_can_read && s->chr.chr_can_read(s->chr.handler_opaque) && |
| 80 | s->chr.chr_read) { |
| 81 | s->chr.chr_read(s->chr.handler_opaque, |
| 82 | s->outfifo + s->out_start ++, 1); |
| 83 | s->out_len --; |
| 84 | if (s->out_start >= s->out_size) { |
| 85 | s->out_start = 0; |
| 86 | s->out_size = FIFO_LEN; |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | if (s->out_len) |
| 91 | qemu_mod_timer(s->out_tm, qemu_get_clock(vm_clock) + s->baud_delay); |
| 92 | } |
| 93 | |
| 94 | #define csrhci_out_packetz(s, len) memset(csrhci_out_packet(s, len), 0, len) |
| 95 | static uint8_t *csrhci_out_packet(struct csrhci_s *s, int len) |
| 96 | { |
| 97 | int off = s->out_start + s->out_len; |
| 98 | |
| 99 | /* TODO: do the padding here, i.e. align len */ |
| 100 | s->out_len += len; |
| 101 | |
| 102 | if (off < FIFO_LEN) { |
| 103 | if (off + len > FIFO_LEN && (s->out_size = off + len) > FIFO_LEN * 2) { |
| 104 | fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len); |
| 105 | exit(-1); |
| 106 | } |
| 107 | return s->outfifo + off; |
| 108 | } |
| 109 | |
| 110 | if (s->out_len > s->out_size) { |
| 111 | fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len); |
| 112 | exit(-1); |
| 113 | } |
| 114 | |
| 115 | return s->outfifo + off - s->out_size; |
| 116 | } |
| 117 | |
| 118 | static inline uint8_t *csrhci_out_packet_csr(struct csrhci_s *s, |
| 119 | int type, int len) |
| 120 | { |
| 121 | uint8_t *ret = csrhci_out_packetz(s, len + 2); |
| 122 | |
| 123 | *ret ++ = type; |
| 124 | *ret ++ = len; |
| 125 | |
| 126 | return ret; |
| 127 | } |
| 128 | |
| 129 | static inline uint8_t *csrhci_out_packet_event(struct csrhci_s *s, |
| 130 | int evt, int len) |
| 131 | { |
| 132 | uint8_t *ret = csrhci_out_packetz(s, |
| 133 | len + 1 + sizeof(struct hci_event_hdr)); |
| 134 | |
| 135 | *ret ++ = H4_EVT_PKT; |
| 136 | ((struct hci_event_hdr *) ret)->evt = evt; |
| 137 | ((struct hci_event_hdr *) ret)->plen = len; |
| 138 | |
| 139 | return ret + sizeof(struct hci_event_hdr); |
| 140 | } |
| 141 | |
| 142 | static void csrhci_in_packet_vendor(struct csrhci_s *s, int ocf, |
| 143 | uint8_t *data, int len) |
| 144 | { |
| 145 | int offset; |
| 146 | uint8_t *rpkt; |
| 147 | |
| 148 | switch (ocf) { |
| 149 | case OCF_CSR_SEND_FIRMWARE: |
| 150 | /* Check if this is the bd_address packet */ |
| 151 | if (len >= 18 + 8 && data[12] == 0x01 && data[13] == 0x00) { |
| 152 | offset = 18; |
| 153 | s->bd_addr.b[0] = data[offset + 7]; /* Beyond cmd packet end(!?) */ |
| 154 | s->bd_addr.b[1] = data[offset + 6]; |
| 155 | s->bd_addr.b[2] = data[offset + 4]; |
| 156 | s->bd_addr.b[3] = data[offset + 0]; |
| 157 | s->bd_addr.b[4] = data[offset + 3]; |
| 158 | s->bd_addr.b[5] = data[offset + 2]; |
| 159 | |
| 160 | s->hci->bdaddr_set(s->hci, s->bd_addr.b); |
| 161 | fprintf(stderr, "%s: bd_address loaded from firmware: " |
| 162 | "%02x:%02x:%02x:%02x:%02x:%02x\n", __FUNCTION__, |
| 163 | s->bd_addr.b[0], s->bd_addr.b[1], s->bd_addr.b[2], |
| 164 | s->bd_addr.b[3], s->bd_addr.b[4], s->bd_addr.b[5]); |
| 165 | } |
| 166 | |
| 167 | rpkt = csrhci_out_packet_event(s, EVT_VENDOR, 11); |
| 168 | /* Status bytes: no error */ |
| 169 | rpkt[9] = 0x00; |
| 170 | rpkt[10] = 0x00; |
| 171 | break; |
| 172 | |
| 173 | default: |
| 174 | fprintf(stderr, "%s: got a bad CMD packet\n", __FUNCTION__); |
| 175 | return; |
| 176 | } |
| 177 | |
| 178 | csrhci_fifo_wake(s); |
| 179 | } |
| 180 | |
| 181 | static void csrhci_in_packet(struct csrhci_s *s, uint8_t *pkt) |
| 182 | { |
| 183 | uint8_t *rpkt; |
| 184 | int opc; |
| 185 | |
| 186 | switch (*pkt ++) { |
| 187 | case H4_CMD_PKT: |
| 188 | opc = le16_to_cpu(((struct hci_command_hdr *) pkt)->opcode); |
| 189 | if (cmd_opcode_ogf(opc) == OGF_VENDOR_CMD) { |
| 190 | csrhci_in_packet_vendor(s, cmd_opcode_ocf(opc), |
| 191 | pkt + sizeof(struct hci_command_hdr), |
| 192 | s->in_len - sizeof(struct hci_command_hdr) - 1); |
| 193 | return; |
| 194 | } |
| 195 | |
| 196 | /* TODO: if the command is OCF_READ_LOCAL_COMMANDS or the likes, |
| 197 | * we need to send it to the HCI layer and then add our supported |
| 198 | * commands to the returned mask (such as OGF_VENDOR_CMD). With |
| 199 | * bt-hci.c we could just have hooks for this kind of commands but |
| 200 | * we can't with bt-host.c. */ |
| 201 | |
| 202 | s->hci->cmd_send(s->hci, pkt, s->in_len - 1); |
| 203 | break; |
| 204 | |
| 205 | case H4_EVT_PKT: |
| 206 | goto bad_pkt; |
| 207 | |
| 208 | case H4_ACL_PKT: |
| 209 | s->hci->acl_send(s->hci, pkt, s->in_len - 1); |
| 210 | break; |
| 211 | |
| 212 | case H4_SCO_PKT: |
| 213 | s->hci->sco_send(s->hci, pkt, s->in_len - 1); |
| 214 | break; |
| 215 | |
| 216 | case H4_NEG_PKT: |
| 217 | if (s->in_hdr != sizeof(csrhci_neg_packet) || |
| 218 | memcmp(pkt - 1, csrhci_neg_packet, s->in_hdr)) { |
| 219 | fprintf(stderr, "%s: got a bad NEG packet\n", __FUNCTION__); |
| 220 | return; |
| 221 | } |
| 222 | pkt += 2; |
| 223 | |
| 224 | rpkt = csrhci_out_packet_csr(s, H4_NEG_PKT, 10); |
| 225 | |
| 226 | *rpkt ++ = 0x20; /* Operational settings negotation Ok */ |
| 227 | memcpy(rpkt, pkt, 7); rpkt += 7; |
| 228 | *rpkt ++ = 0xff; |
David Turner | a253513 | 2010-09-10 10:15:07 +0200 | [diff] [blame] | 229 | *rpkt = 0xff; |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 230 | break; |
| 231 | |
| 232 | case H4_ALIVE_PKT: |
| 233 | if (s->in_hdr != 4 || pkt[1] != 0x55 || pkt[2] != 0x00) { |
| 234 | fprintf(stderr, "%s: got a bad ALIVE packet\n", __FUNCTION__); |
| 235 | return; |
| 236 | } |
| 237 | |
| 238 | rpkt = csrhci_out_packet_csr(s, H4_ALIVE_PKT, 2); |
| 239 | |
| 240 | *rpkt ++ = 0xcc; |
David Turner | a253513 | 2010-09-10 10:15:07 +0200 | [diff] [blame] | 241 | *rpkt = 0x00; |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 242 | break; |
| 243 | |
| 244 | default: |
| 245 | bad_pkt: |
| 246 | /* TODO: error out */ |
| 247 | fprintf(stderr, "%s: got a bad packet\n", __FUNCTION__); |
| 248 | break; |
| 249 | } |
| 250 | |
| 251 | csrhci_fifo_wake(s); |
| 252 | } |
| 253 | |
| 254 | static int csrhci_header_len(const uint8_t *pkt) |
| 255 | { |
| 256 | switch (pkt[0]) { |
| 257 | case H4_CMD_PKT: |
| 258 | return HCI_COMMAND_HDR_SIZE; |
| 259 | case H4_EVT_PKT: |
| 260 | return HCI_EVENT_HDR_SIZE; |
| 261 | case H4_ACL_PKT: |
| 262 | return HCI_ACL_HDR_SIZE; |
| 263 | case H4_SCO_PKT: |
| 264 | return HCI_SCO_HDR_SIZE; |
| 265 | case H4_NEG_PKT: |
| 266 | return pkt[1] + 1; |
| 267 | case H4_ALIVE_PKT: |
| 268 | return 3; |
| 269 | } |
| 270 | |
| 271 | exit(-1); |
| 272 | } |
| 273 | |
| 274 | static int csrhci_data_len(const uint8_t *pkt) |
| 275 | { |
| 276 | switch (*pkt ++) { |
| 277 | case H4_CMD_PKT: |
| 278 | /* It seems that vendor-specific command packets for H4+ are all |
| 279 | * one byte longer than indicated in the standard header. */ |
| 280 | if (le16_to_cpu(((struct hci_command_hdr *) pkt)->opcode) == 0xfc00) |
| 281 | return (((struct hci_command_hdr *) pkt)->plen + 1) & ~1; |
| 282 | |
| 283 | return ((struct hci_command_hdr *) pkt)->plen; |
| 284 | case H4_EVT_PKT: |
| 285 | return ((struct hci_event_hdr *) pkt)->plen; |
| 286 | case H4_ACL_PKT: |
| 287 | return le16_to_cpu(((struct hci_acl_hdr *) pkt)->dlen); |
| 288 | case H4_SCO_PKT: |
| 289 | return ((struct hci_sco_hdr *) pkt)->dlen; |
| 290 | case H4_NEG_PKT: |
| 291 | case H4_ALIVE_PKT: |
| 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | exit(-1); |
| 296 | } |
| 297 | |
| 298 | static int csrhci_write(struct CharDriverState *chr, |
| 299 | const uint8_t *buf, int len) |
| 300 | { |
| 301 | struct csrhci_s *s = (struct csrhci_s *) chr->opaque; |
| 302 | int plen = s->in_len; |
| 303 | |
| 304 | if (!s->enable) |
| 305 | return 0; |
| 306 | |
| 307 | s->in_len += len; |
| 308 | memcpy(s->inpkt + plen, buf, len); |
| 309 | |
| 310 | while (1) { |
| 311 | if (s->in_len >= 2 && plen < 2) |
| 312 | s->in_hdr = csrhci_header_len(s->inpkt) + 1; |
| 313 | |
| 314 | if (s->in_len >= s->in_hdr && plen < s->in_hdr) |
| 315 | s->in_data = csrhci_data_len(s->inpkt) + s->in_hdr; |
| 316 | |
| 317 | if (s->in_len >= s->in_data) { |
| 318 | csrhci_in_packet(s, s->inpkt); |
| 319 | |
| 320 | memmove(s->inpkt, s->inpkt + s->in_len, s->in_len - s->in_data); |
| 321 | s->in_len -= s->in_data; |
| 322 | s->in_hdr = INT_MAX; |
| 323 | s->in_data = INT_MAX; |
| 324 | plen = 0; |
| 325 | } else |
| 326 | break; |
| 327 | } |
| 328 | |
| 329 | return len; |
| 330 | } |
| 331 | |
| 332 | static void csrhci_out_hci_packet_event(void *opaque, |
| 333 | const uint8_t *data, int len) |
| 334 | { |
| 335 | struct csrhci_s *s = (struct csrhci_s *) opaque; |
| 336 | uint8_t *pkt = csrhci_out_packet(s, (len + 2) & ~1); /* Align */ |
| 337 | |
| 338 | *pkt ++ = H4_EVT_PKT; |
| 339 | memcpy(pkt, data, len); |
| 340 | |
| 341 | csrhci_fifo_wake(s); |
| 342 | } |
| 343 | |
| 344 | static void csrhci_out_hci_packet_acl(void *opaque, |
| 345 | const uint8_t *data, int len) |
| 346 | { |
| 347 | struct csrhci_s *s = (struct csrhci_s *) opaque; |
| 348 | uint8_t *pkt = csrhci_out_packet(s, (len + 2) & ~1); /* Align */ |
| 349 | |
| 350 | *pkt ++ = H4_ACL_PKT; |
| 351 | pkt[len & ~1] = 0; |
| 352 | memcpy(pkt, data, len); |
| 353 | |
| 354 | csrhci_fifo_wake(s); |
| 355 | } |
| 356 | |
| 357 | static int csrhci_ioctl(struct CharDriverState *chr, int cmd, void *arg) |
| 358 | { |
| 359 | QEMUSerialSetParams *ssp; |
| 360 | struct csrhci_s *s = (struct csrhci_s *) chr->opaque; |
| 361 | int prev_state = s->modem_state; |
| 362 | |
| 363 | switch (cmd) { |
| 364 | case CHR_IOCTL_SERIAL_SET_PARAMS: |
| 365 | ssp = (QEMUSerialSetParams *) arg; |
David Turner | a253513 | 2010-09-10 10:15:07 +0200 | [diff] [blame] | 366 | s->baud_delay = get_ticks_per_sec() / ssp->speed; |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 367 | /* Moments later... (but shorter than 100ms) */ |
| 368 | s->modem_state |= CHR_TIOCM_CTS; |
| 369 | break; |
| 370 | |
| 371 | case CHR_IOCTL_SERIAL_GET_TIOCM: |
| 372 | *(int *) arg = s->modem_state; |
| 373 | break; |
| 374 | |
| 375 | case CHR_IOCTL_SERIAL_SET_TIOCM: |
| 376 | s->modem_state = *(int *) arg; |
| 377 | if (~s->modem_state & prev_state & CHR_TIOCM_RTS) |
| 378 | s->modem_state &= ~CHR_TIOCM_CTS; |
| 379 | break; |
| 380 | |
| 381 | default: |
| 382 | return -ENOTSUP; |
| 383 | } |
| 384 | return 0; |
| 385 | } |
| 386 | |
| 387 | static void csrhci_reset(struct csrhci_s *s) |
| 388 | { |
| 389 | s->out_len = 0; |
| 390 | s->out_size = FIFO_LEN; |
| 391 | s->in_len = 0; |
David Turner | a253513 | 2010-09-10 10:15:07 +0200 | [diff] [blame] | 392 | s->baud_delay = get_ticks_per_sec(); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 393 | s->enable = 0; |
| 394 | s->in_hdr = INT_MAX; |
| 395 | s->in_data = INT_MAX; |
| 396 | |
| 397 | s->modem_state = 0; |
| 398 | /* After a while... (but sooner than 10ms) */ |
| 399 | s->modem_state |= CHR_TIOCM_CTS; |
| 400 | |
| 401 | memset(&s->bd_addr, 0, sizeof(bdaddr_t)); |
| 402 | } |
| 403 | |
| 404 | static void csrhci_out_tick(void *opaque) |
| 405 | { |
| 406 | csrhci_fifo_wake((struct csrhci_s *) opaque); |
| 407 | } |
| 408 | |
| 409 | static void csrhci_pins(void *opaque, int line, int level) |
| 410 | { |
| 411 | struct csrhci_s *s = (struct csrhci_s *) opaque; |
| 412 | int state = s->pin_state; |
| 413 | |
| 414 | s->pin_state &= ~(1 << line); |
| 415 | s->pin_state |= (!!level) << line; |
| 416 | |
| 417 | if ((state & ~s->pin_state) & (1 << csrhci_pin_reset)) { |
| 418 | /* TODO: Disappear from lower layers */ |
| 419 | csrhci_reset(s); |
| 420 | } |
| 421 | |
| 422 | if (s->pin_state == 3 && state != 3) { |
| 423 | s->enable = 1; |
| 424 | /* TODO: Wake lower layers up */ |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | qemu_irq *csrhci_pins_get(CharDriverState *chr) |
| 429 | { |
| 430 | struct csrhci_s *s = (struct csrhci_s *) chr->opaque; |
| 431 | |
| 432 | return s->pins; |
| 433 | } |
| 434 | |
| 435 | CharDriverState *uart_hci_init(qemu_irq wakeup) |
| 436 | { |
| 437 | struct csrhci_s *s = (struct csrhci_s *) |
| 438 | qemu_mallocz(sizeof(struct csrhci_s)); |
| 439 | |
| 440 | s->chr.opaque = s; |
| 441 | s->chr.chr_write = csrhci_write; |
| 442 | s->chr.chr_ioctl = csrhci_ioctl; |
| 443 | |
| 444 | s->hci = qemu_next_hci(); |
| 445 | s->hci->opaque = s; |
| 446 | s->hci->evt_recv = csrhci_out_hci_packet_event; |
| 447 | s->hci->acl_recv = csrhci_out_hci_packet_acl; |
| 448 | |
| 449 | s->out_tm = qemu_new_timer(vm_clock, csrhci_out_tick, s); |
| 450 | s->pins = qemu_allocate_irqs(csrhci_pins, s, __csrhci_pins); |
| 451 | csrhci_reset(s); |
| 452 | |
| 453 | return &s->chr; |
| 454 | } |