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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"
26#include "hw/irq.h"
27#include "sysemu/bt.h"
28#include "hw/bt.h"
29
30struct csrhci_s {
31 int enable;
32 qemu_irq *pins;
33 int pin_state;
34 int modem_state;
35 CharDriverState chr;
36#define FIFO_LEN 4096
37 int out_start;
38 int out_len;
39 int out_size;
40 uint8_t outfifo[FIFO_LEN * 2];
41 uint8_t inpkt[FIFO_LEN];
42 int in_len;
43 int in_hdr;
44 int in_data;
45 QEMUTimer *out_tm;
46 int64_t baud_delay;
47
48 bdaddr_t bd_addr;
49 struct HCIInfo *hci;
50};
51
52
53enum {
54 H4_CMD_PKT = 1,
55 H4_ACL_PKT = 2,
56 H4_SCO_PKT = 3,
57 H4_EVT_PKT = 4,
58 H4_NEG_PKT = 6,
59 H4_ALIVE_PKT = 7,
60};
61
62
63static const uint8_t csrhci_neg_packet[] = {
64 H4_NEG_PKT, 10,
65 0x00, 0xa0, 0x01, 0x00, 0x00,
66 0x4c, 0x00, 0x96, 0x00, 0x00,
67};
68
69
70enum {
71 OCF_CSR_SEND_FIRMWARE = 0x000,
72};
73
74static inline void csrhci_fifo_wake(struct csrhci_s *s)
75{
76 if (!s->enable || !s->out_len)
77 return;
78
79
80 if (s->chr.chr_can_read && s->chr.chr_can_read(s->chr.handler_opaque) &&
81 s->chr.chr_read) {
82 s->chr.chr_read(s->chr.handler_opaque,
83 s->outfifo + s->out_start ++, 1);
84 s->out_len --;
85 if (s->out_start >= s->out_size) {
86 s->out_start = 0;
87 s->out_size = FIFO_LEN;
88 }
89 }
90
91 if (s->out_len)
92 timer_mod(s->out_tm, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->baud_delay);
93}
94
95#define csrhci_out_packetz(s, len) memset(csrhci_out_packet(s, len), 0, len)
96static uint8_t *csrhci_out_packet(struct csrhci_s *s, int len)
97{
98 int off = s->out_start + s->out_len;
99
100
101 s->out_len += len;
102
103 if (off < FIFO_LEN) {
104 if (off + len > FIFO_LEN && (s->out_size = off + len) > FIFO_LEN * 2) {
105 fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
106 exit(-1);
107 }
108 return s->outfifo + off;
109 }
110
111 if (s->out_len > s->out_size) {
112 fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
113 exit(-1);
114 }
115
116 return s->outfifo + off - s->out_size;
117}
118
119static inline uint8_t *csrhci_out_packet_csr(struct csrhci_s *s,
120 int type, int len)
121{
122 uint8_t *ret = csrhci_out_packetz(s, len + 2);
123
124 *ret ++ = type;
125 *ret ++ = len;
126
127 return ret;
128}
129
130static inline uint8_t *csrhci_out_packet_event(struct csrhci_s *s,
131 int evt, int len)
132{
133 uint8_t *ret = csrhci_out_packetz(s,
134 len + 1 + sizeof(struct hci_event_hdr));
135
136 *ret ++ = H4_EVT_PKT;
137 ((struct hci_event_hdr *) ret)->evt = evt;
138 ((struct hci_event_hdr *) ret)->plen = len;
139
140 return ret + sizeof(struct hci_event_hdr);
141}
142
143static void csrhci_in_packet_vendor(struct csrhci_s *s, int ocf,
144 uint8_t *data, int len)
145{
146 int offset;
147 uint8_t *rpkt;
148
149 switch (ocf) {
150 case OCF_CSR_SEND_FIRMWARE:
151
152 if (len >= 18 + 8 && data[12] == 0x01 && data[13] == 0x00) {
153 offset = 18;
154 s->bd_addr.b[0] = data[offset + 7];
155 s->bd_addr.b[1] = data[offset + 6];
156 s->bd_addr.b[2] = data[offset + 4];
157 s->bd_addr.b[3] = data[offset + 0];
158 s->bd_addr.b[4] = data[offset + 3];
159 s->bd_addr.b[5] = data[offset + 2];
160
161 s->hci->bdaddr_set(s->hci, s->bd_addr.b);
162 fprintf(stderr, "%s: bd_address loaded from firmware: "
163 "%02x:%02x:%02x:%02x:%02x:%02x\n", __FUNCTION__,
164 s->bd_addr.b[0], s->bd_addr.b[1], s->bd_addr.b[2],
165 s->bd_addr.b[3], s->bd_addr.b[4], s->bd_addr.b[5]);
166 }
167
168 rpkt = csrhci_out_packet_event(s, EVT_VENDOR, 11);
169
170 rpkt[9] = 0x00;
171 rpkt[10] = 0x00;
172 break;
173
174 default:
175 fprintf(stderr, "%s: got a bad CMD packet\n", __FUNCTION__);
176 return;
177 }
178
179 csrhci_fifo_wake(s);
180}
181
182static void csrhci_in_packet(struct csrhci_s *s, uint8_t *pkt)
183{
184 uint8_t *rpkt;
185 int opc;
186
187 switch (*pkt ++) {
188 case H4_CMD_PKT:
189 opc = le16_to_cpu(((struct hci_command_hdr *) pkt)->opcode);
190 if (cmd_opcode_ogf(opc) == OGF_VENDOR_CMD) {
191 csrhci_in_packet_vendor(s, cmd_opcode_ocf(opc),
192 pkt + sizeof(struct hci_command_hdr),
193 s->in_len - sizeof(struct hci_command_hdr) - 1);
194 return;
195 }
196
197
198
199
200
201
202
203 s->hci->cmd_send(s->hci, pkt, s->in_len - 1);
204 break;
205
206 case H4_EVT_PKT:
207 goto bad_pkt;
208
209 case H4_ACL_PKT:
210 s->hci->acl_send(s->hci, pkt, s->in_len - 1);
211 break;
212
213 case H4_SCO_PKT:
214 s->hci->sco_send(s->hci, pkt, s->in_len - 1);
215 break;
216
217 case H4_NEG_PKT:
218 if (s->in_hdr != sizeof(csrhci_neg_packet) ||
219 memcmp(pkt - 1, csrhci_neg_packet, s->in_hdr)) {
220 fprintf(stderr, "%s: got a bad NEG packet\n", __FUNCTION__);
221 return;
222 }
223 pkt += 2;
224
225 rpkt = csrhci_out_packet_csr(s, H4_NEG_PKT, 10);
226
227 *rpkt ++ = 0x20;
228 memcpy(rpkt, pkt, 7); rpkt += 7;
229 *rpkt ++ = 0xff;
230 *rpkt = 0xff;
231 break;
232
233 case H4_ALIVE_PKT:
234 if (s->in_hdr != 4 || pkt[1] != 0x55 || pkt[2] != 0x00) {
235 fprintf(stderr, "%s: got a bad ALIVE packet\n", __FUNCTION__);
236 return;
237 }
238
239 rpkt = csrhci_out_packet_csr(s, H4_ALIVE_PKT, 2);
240
241 *rpkt ++ = 0xcc;
242 *rpkt = 0x00;
243 break;
244
245 default:
246 bad_pkt:
247
248 fprintf(stderr, "%s: got a bad packet\n", __FUNCTION__);
249 break;
250 }
251
252 csrhci_fifo_wake(s);
253}
254
255static int csrhci_header_len(const uint8_t *pkt)
256{
257 switch (pkt[0]) {
258 case H4_CMD_PKT:
259 return HCI_COMMAND_HDR_SIZE;
260 case H4_EVT_PKT:
261 return HCI_EVENT_HDR_SIZE;
262 case H4_ACL_PKT:
263 return HCI_ACL_HDR_SIZE;
264 case H4_SCO_PKT:
265 return HCI_SCO_HDR_SIZE;
266 case H4_NEG_PKT:
267 return pkt[1] + 1;
268 case H4_ALIVE_PKT:
269 return 3;
270 }
271
272 exit(-1);
273}
274
275static int csrhci_data_len(const uint8_t *pkt)
276{
277 switch (*pkt ++) {
278 case H4_CMD_PKT:
279
280
281 if (le16_to_cpu(((struct hci_command_hdr *) pkt)->opcode) == 0xfc00)
282 return (((struct hci_command_hdr *) pkt)->plen + 1) & ~1;
283
284 return ((struct hci_command_hdr *) pkt)->plen;
285 case H4_EVT_PKT:
286 return ((struct hci_event_hdr *) pkt)->plen;
287 case H4_ACL_PKT:
288 return le16_to_cpu(((struct hci_acl_hdr *) pkt)->dlen);
289 case H4_SCO_PKT:
290 return ((struct hci_sco_hdr *) pkt)->dlen;
291 case H4_NEG_PKT:
292 case H4_ALIVE_PKT:
293 return 0;
294 }
295
296 exit(-1);
297}
298
299static int csrhci_write(struct CharDriverState *chr,
300 const uint8_t *buf, int len)
301{
302 struct csrhci_s *s = (struct csrhci_s *) chr->opaque;
303 int plen = s->in_len;
304
305 if (!s->enable)
306 return 0;
307
308 s->in_len += len;
309 memcpy(s->inpkt + plen, buf, len);
310
311 while (1) {
312 if (s->in_len >= 2 && plen < 2)
313 s->in_hdr = csrhci_header_len(s->inpkt) + 1;
314
315 if (s->in_len >= s->in_hdr && plen < s->in_hdr)
316 s->in_data = csrhci_data_len(s->inpkt) + s->in_hdr;
317
318 if (s->in_len >= s->in_data) {
319 csrhci_in_packet(s, s->inpkt);
320
321 memmove(s->inpkt, s->inpkt + s->in_len, s->in_len - s->in_data);
322 s->in_len -= s->in_data;
323 s->in_hdr = INT_MAX;
324 s->in_data = INT_MAX;
325 plen = 0;
326 } else
327 break;
328 }
329
330 return len;
331}
332
333static void csrhci_out_hci_packet_event(void *opaque,
334 const uint8_t *data, int len)
335{
336 struct csrhci_s *s = (struct csrhci_s *) opaque;
337 uint8_t *pkt = csrhci_out_packet(s, (len + 2) & ~1);
338
339 *pkt ++ = H4_EVT_PKT;
340 memcpy(pkt, data, len);
341
342 csrhci_fifo_wake(s);
343}
344
345static void csrhci_out_hci_packet_acl(void *opaque,
346 const uint8_t *data, int len)
347{
348 struct csrhci_s *s = (struct csrhci_s *) opaque;
349 uint8_t *pkt = csrhci_out_packet(s, (len + 2) & ~1);
350
351 *pkt ++ = H4_ACL_PKT;
352 pkt[len & ~1] = 0;
353 memcpy(pkt, data, len);
354
355 csrhci_fifo_wake(s);
356}
357
358static int csrhci_ioctl(struct CharDriverState *chr, int cmd, void *arg)
359{
360 QEMUSerialSetParams *ssp;
361 struct csrhci_s *s = (struct csrhci_s *) chr->opaque;
362 int prev_state = s->modem_state;
363
364 switch (cmd) {
365 case CHR_IOCTL_SERIAL_SET_PARAMS:
366 ssp = (QEMUSerialSetParams *) arg;
367 s->baud_delay = NANOSECONDS_PER_SECOND / ssp->speed;
368
369 s->modem_state |= CHR_TIOCM_CTS;
370 break;
371
372 case CHR_IOCTL_SERIAL_GET_TIOCM:
373 *(int *) arg = s->modem_state;
374 break;
375
376 case CHR_IOCTL_SERIAL_SET_TIOCM:
377 s->modem_state = *(int *) arg;
378 if (~s->modem_state & prev_state & CHR_TIOCM_RTS)
379 s->modem_state &= ~CHR_TIOCM_CTS;
380 break;
381
382 default:
383 return -ENOTSUP;
384 }
385 return 0;
386}
387
388static void csrhci_reset(struct csrhci_s *s)
389{
390 s->out_len = 0;
391 s->out_size = FIFO_LEN;
392 s->in_len = 0;
393 s->baud_delay = NANOSECONDS_PER_SECOND;
394 s->enable = 0;
395 s->in_hdr = INT_MAX;
396 s->in_data = INT_MAX;
397
398 s->modem_state = 0;
399
400 s->modem_state |= CHR_TIOCM_CTS;
401
402 memset(&s->bd_addr, 0, sizeof(bdaddr_t));
403}
404
405static void csrhci_out_tick(void *opaque)
406{
407 csrhci_fifo_wake((struct csrhci_s *) opaque);
408}
409
410static void csrhci_pins(void *opaque, int line, int level)
411{
412 struct csrhci_s *s = (struct csrhci_s *) opaque;
413 int state = s->pin_state;
414
415 s->pin_state &= ~(1 << line);
416 s->pin_state |= (!!level) << line;
417
418 if ((state & ~s->pin_state) & (1 << csrhci_pin_reset)) {
419
420 csrhci_reset(s);
421 }
422
423 if (s->pin_state == 3 && state != 3) {
424 s->enable = 1;
425
426 }
427}
428
429qemu_irq *csrhci_pins_get(CharDriverState *chr)
430{
431 struct csrhci_s *s = (struct csrhci_s *) chr->opaque;
432
433 return s->pins;
434}
435
436CharDriverState *uart_hci_init(qemu_irq wakeup)
437{
438 struct csrhci_s *s = (struct csrhci_s *)
439 g_malloc0(sizeof(struct csrhci_s));
440
441 s->chr.opaque = s;
442 s->chr.chr_write = csrhci_write;
443 s->chr.chr_ioctl = csrhci_ioctl;
444 s->chr.avail_connections = 1;
445
446 s->hci = qemu_next_hci();
447 s->hci->opaque = s;
448 s->hci->evt_recv = csrhci_out_hci_packet_event;
449 s->hci->acl_recv = csrhci_out_hci_packet_acl;
450
451 s->out_tm = timer_new_ns(QEMU_CLOCK_VIRTUAL, csrhci_out_tick, s);
452 s->pins = qemu_allocate_irqs(csrhci_pins, s, __csrhci_pins);
453 csrhci_reset(s);
454
455 return &s->chr;
456}
457