2 * FTDI FT232BM Device emulation
4 * Copyright (c) 2006 CodeSourcery.
5 * Copyright (c) 2008 Samuel Thibault <samuel.thibault@ens-lyon.org>
6 * Written by Paul Brook, reused for FTDI by Samuel Thibault
8 * This code is licensed under the LGPL.
11 #include "qemu-common.h"
12 #include "qemu/error-report.h"
14 #include "hw/usb/desc.h"
15 #include "char/char.h"
17 //#define DEBUG_Serial
20 #define DPRINTF(fmt, ...) \
21 do { printf("usb-serial: " fmt , ## __VA_ARGS__); } while (0)
23 #define DPRINTF(fmt, ...) do {} while(0)
30 #define FTDI_SET_MDM_CTRL 1
31 #define FTDI_SET_FLOW_CTRL 2
32 #define FTDI_SET_BAUD 3
33 #define FTDI_SET_DATA 4
34 #define FTDI_GET_MDM_ST 5
35 #define FTDI_SET_EVENT_CHR 6
36 #define FTDI_SET_ERROR_CHR 7
37 #define FTDI_SET_LATENCY 9
38 #define FTDI_GET_LATENCY 10
40 #define DeviceOutVendor ((USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_DEVICE)<<8)
41 #define DeviceInVendor ((USB_DIR_IN |USB_TYPE_VENDOR|USB_RECIP_DEVICE)<<8)
45 #define FTDI_RESET_SIO 0
46 #define FTDI_RESET_RX 1
47 #define FTDI_RESET_TX 2
52 #define FTDI_SET_DTR (FTDI_DTR << 8)
54 #define FTDI_SET_RTS (FTDI_RTS << 8)
58 #define FTDI_RTS_CTS_HS 1
59 #define FTDI_DTR_DSR_HS 2
60 #define FTDI_XON_XOFF_HS 4
64 #define FTDI_PARITY (0x7 << 8)
65 #define FTDI_ODD (0x1 << 8)
66 #define FTDI_EVEN (0x2 << 8)
67 #define FTDI_MARK (0x3 << 8)
68 #define FTDI_SPACE (0x4 << 8)
70 #define FTDI_STOP (0x3 << 11)
71 #define FTDI_STOP1 (0x0 << 11)
72 #define FTDI_STOP15 (0x1 << 11)
73 #define FTDI_STOP2 (0x2 << 11)
76 /* TODO: should be sent every 40ms */
77 #define FTDI_CTS (1<<4) // CTS line status
78 #define FTDI_DSR (1<<5) // DSR line status
79 #define FTDI_RI (1<<6) // RI line status
80 #define FTDI_RLSD (1<<7) // Receive Line Signal Detect
84 #define FTDI_DR (1<<0) // Data Ready
85 #define FTDI_OE (1<<1) // Overrun Err
86 #define FTDI_PE (1<<2) // Parity Err
87 #define FTDI_FE (1<<3) // Framing Err
88 #define FTDI_BI (1<<4) // Break Interrupt
89 #define FTDI_THRE (1<<5) // Transmitter Holding Register
90 #define FTDI_TEMT (1<<6) // Transmitter Empty
91 #define FTDI_FIFO (1<<7) // Error in FIFO
95 uint8_t recv_buf[RECV_BUF];
100 uint8_t event_trigger;
101 QEMUSerialSetParams params;
102 int latency; /* ms */
107 STR_MANUFACTURER = 1,
113 static const USBDescStrings desc_strings = {
114 [STR_MANUFACTURER] = "QEMU",
115 [STR_PRODUCT_SERIAL] = "QEMU USB SERIAL",
116 [STR_PRODUCT_BRAILLE] = "QEMU USB BAUM BRAILLE",
117 [STR_SERIALNUMBER] = "1",
120 static const USBDescIface desc_iface0 = {
121 .bInterfaceNumber = 0,
123 .bInterfaceClass = 0xff,
124 .bInterfaceSubClass = 0xff,
125 .bInterfaceProtocol = 0xff,
126 .eps = (USBDescEndpoint[]) {
128 .bEndpointAddress = USB_DIR_IN | 0x01,
129 .bmAttributes = USB_ENDPOINT_XFER_BULK,
130 .wMaxPacketSize = 64,
132 .bEndpointAddress = USB_DIR_OUT | 0x02,
133 .bmAttributes = USB_ENDPOINT_XFER_BULK,
134 .wMaxPacketSize = 64,
139 static const USBDescDevice desc_device = {
141 .bMaxPacketSize0 = 8,
142 .bNumConfigurations = 1,
143 .confs = (USBDescConfig[]) {
146 .bConfigurationValue = 1,
147 .bmAttributes = 0x80,
155 static const USBDesc desc_serial = {
160 .iManufacturer = STR_MANUFACTURER,
161 .iProduct = STR_PRODUCT_SERIAL,
162 .iSerialNumber = STR_SERIALNUMBER,
164 .full = &desc_device,
168 static const USBDesc desc_braille = {
173 .iManufacturer = STR_MANUFACTURER,
174 .iProduct = STR_PRODUCT_BRAILLE,
175 .iSerialNumber = STR_SERIALNUMBER,
177 .full = &desc_device,
181 static void usb_serial_reset(USBSerialState *s)
183 /* TODO: Set flow control to none */
185 s->event_trigger = 0;
188 /* TODO: purge in char driver */
191 static void usb_serial_handle_reset(USBDevice *dev)
193 USBSerialState *s = (USBSerialState *)dev;
198 /* TODO: Reset char device, send BREAK? */
201 static uint8_t usb_get_modem_lines(USBSerialState *s)
206 if (qemu_chr_fe_ioctl(s->cs, CHR_IOCTL_SERIAL_GET_TIOCM, &flags) == -ENOTSUP)
207 return FTDI_CTS|FTDI_DSR|FTDI_RLSD;
210 if (flags & CHR_TIOCM_CTS)
212 if (flags & CHR_TIOCM_DSR)
214 if (flags & CHR_TIOCM_RI)
216 if (flags & CHR_TIOCM_CAR)
222 static void usb_serial_handle_control(USBDevice *dev, USBPacket *p,
223 int request, int value, int index, int length, uint8_t *data)
225 USBSerialState *s = (USBSerialState *)dev;
228 DPRINTF("got control %x, value %x\n",request, value);
229 ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
235 case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
238 /* Class specific requests. */
239 case DeviceOutVendor | FTDI_RESET:
247 /* TODO: purge from char device */
250 /* TODO: purge from char device */
254 case DeviceOutVendor | FTDI_SET_MDM_CTRL:
257 qemu_chr_fe_ioctl(s->cs,CHR_IOCTL_SERIAL_GET_TIOCM, &flags);
258 if (value & FTDI_SET_RTS) {
259 if (value & FTDI_RTS)
260 flags |= CHR_TIOCM_RTS;
262 flags &= ~CHR_TIOCM_RTS;
264 if (value & FTDI_SET_DTR) {
265 if (value & FTDI_DTR)
266 flags |= CHR_TIOCM_DTR;
268 flags &= ~CHR_TIOCM_DTR;
270 qemu_chr_fe_ioctl(s->cs,CHR_IOCTL_SERIAL_SET_TIOCM, &flags);
273 case DeviceOutVendor | FTDI_SET_FLOW_CTRL:
276 case DeviceOutVendor | FTDI_SET_BAUD: {
277 static const int subdivisors8[8] = { 0, 4, 2, 1, 3, 5, 6, 7 };
278 int subdivisor8 = subdivisors8[((value & 0xc000) >> 14)
279 | ((index & 1) << 2)];
280 int divisor = value & 0x3fff;
282 /* chip special cases */
283 if (divisor == 1 && subdivisor8 == 0)
285 if (divisor == 0 && subdivisor8 == 0)
288 s->params.speed = (48000000 / 2) / (8 * divisor + subdivisor8);
289 qemu_chr_fe_ioctl(s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params);
292 case DeviceOutVendor | FTDI_SET_DATA:
293 switch (value & FTDI_PARITY) {
295 s->params.parity = 'N';
298 s->params.parity = 'O';
301 s->params.parity = 'E';
304 DPRINTF("unsupported parity %d\n", value & FTDI_PARITY);
307 switch (value & FTDI_STOP) {
309 s->params.stop_bits = 1;
312 s->params.stop_bits = 2;
315 DPRINTF("unsupported stop bits %d\n", value & FTDI_STOP);
318 qemu_chr_fe_ioctl(s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params);
319 /* TODO: TX ON/OFF */
321 case DeviceInVendor | FTDI_GET_MDM_ST:
322 data[0] = usb_get_modem_lines(s) | 1;
324 p->actual_length = 2;
326 case DeviceOutVendor | FTDI_SET_EVENT_CHR:
327 /* TODO: handle it */
328 s->event_chr = value;
330 case DeviceOutVendor | FTDI_SET_ERROR_CHR:
331 /* TODO: handle it */
332 s->error_chr = value;
334 case DeviceOutVendor | FTDI_SET_LATENCY:
337 case DeviceInVendor | FTDI_GET_LATENCY:
338 data[0] = s->latency;
339 p->actual_length = 1;
343 DPRINTF("got unsupported/bogus control %x, value %x\n", request, value);
344 p->status = USB_RET_STALL;
349 static void usb_serial_handle_data(USBDevice *dev, USBPacket *p)
351 USBSerialState *s = (USBSerialState *)dev;
352 uint8_t devep = p->ep->nr;
355 int i, first_len, len;
361 for (i = 0; i < p->iov.niov; i++) {
362 iov = p->iov.iov + i;
363 qemu_chr_fe_write(s->cs, iov->iov_base, iov->iov_len);
365 p->actual_length = p->iov.size;
371 first_len = RECV_BUF - s->recv_ptr;
374 p->status = USB_RET_NAK;
377 header[0] = usb_get_modem_lines(s) | 1;
378 /* We do not have the uart details */
379 /* handle serial break */
380 if (s->event_trigger && s->event_trigger & FTDI_BI) {
381 s->event_trigger &= ~FTDI_BI;
383 usb_packet_copy(p, header, 2);
389 if (len > s->recv_used)
392 p->status = USB_RET_NAK;
397 usb_packet_copy(p, header, 2);
398 usb_packet_copy(p, s->recv_buf + s->recv_ptr, first_len);
400 usb_packet_copy(p, s->recv_buf, len - first_len);
402 s->recv_ptr = (s->recv_ptr + len) % RECV_BUF;
406 DPRINTF("Bad token\n");
408 p->status = USB_RET_STALL;
413 static void usb_serial_handle_destroy(USBDevice *dev)
415 USBSerialState *s = (USBSerialState *)dev;
417 qemu_chr_add_handlers(s->cs, NULL, NULL, NULL, NULL);
420 static int usb_serial_can_read(void *opaque)
422 USBSerialState *s = opaque;
424 if (!s->dev.attached) {
427 return RECV_BUF - s->recv_used;
430 static void usb_serial_read(void *opaque, const uint8_t *buf, int size)
432 USBSerialState *s = opaque;
433 int first_size, start;
435 /* room in the buffer? */
436 if (size > (RECV_BUF - s->recv_used))
437 size = RECV_BUF - s->recv_used;
439 start = s->recv_ptr + s->recv_used;
440 if (start < RECV_BUF) {
441 /* copy data to end of buffer */
442 first_size = RECV_BUF - start;
443 if (first_size > size)
446 memcpy(s->recv_buf + start, buf, first_size);
448 /* wrap around to front if needed */
449 if (size > first_size)
450 memcpy(s->recv_buf, buf + first_size, size - first_size);
453 memcpy(s->recv_buf + start, buf, size);
455 s->recv_used += size;
458 static void usb_serial_event(void *opaque, int event)
460 USBSerialState *s = opaque;
463 case CHR_EVENT_BREAK:
464 s->event_trigger |= FTDI_BI;
466 case CHR_EVENT_FOCUS:
468 case CHR_EVENT_OPENED:
469 if (!s->dev.attached) {
470 usb_device_attach(&s->dev);
473 case CHR_EVENT_CLOSED:
474 if (s->dev.attached) {
475 usb_device_detach(&s->dev);
481 static int usb_serial_initfn(USBDevice *dev)
483 USBSerialState *s = DO_UPCAST(USBSerialState, dev, dev);
485 usb_desc_create_serial(dev);
487 dev->auto_attach = 0;
490 error_report("Property chardev is required");
494 qemu_chr_add_handlers(s->cs, usb_serial_can_read, usb_serial_read,
495 usb_serial_event, s);
496 usb_serial_handle_reset(dev);
498 if (s->cs->be_open && !dev->attached) {
499 usb_device_attach(dev);
504 static USBDevice *usb_serial_init(USBBus *bus, const char *filename)
507 CharDriverState *cdrv;
508 uint32_t vendorid = 0, productid = 0;
512 while (*filename && *filename != ':') {
515 if (strstart(filename, "vendorid=", &p)) {
516 vendorid = strtol(p, &e, 16);
517 if (e == p || (*e && *e != ',' && *e != ':')) {
518 error_report("bogus vendor ID %s", p);
522 } else if (strstart(filename, "productid=", &p)) {
523 productid = strtol(p, &e, 16);
524 if (e == p || (*e && *e != ',' && *e != ':')) {
525 error_report("bogus product ID %s", p);
530 error_report("unrecognized serial USB option %s", filename);
533 while(*filename == ',')
537 error_report("character device specification needed");
542 snprintf(label, sizeof(label), "usbserial%d", index++);
543 cdrv = qemu_chr_new(label, filename, NULL);
547 dev = usb_create(bus, "usb-serial");
551 qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);
553 qdev_prop_set_uint16(&dev->qdev, "vendorid", vendorid);
555 qdev_prop_set_uint16(&dev->qdev, "productid", productid);
556 qdev_init_nofail(&dev->qdev);
561 static USBDevice *usb_braille_init(USBBus *bus, const char *unused)
564 CharDriverState *cdrv;
566 cdrv = qemu_chr_new("braille", "braille", NULL);
570 dev = usb_create(bus, "usb-braille");
571 qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);
572 qdev_init_nofail(&dev->qdev);
577 static const VMStateDescription vmstate_usb_serial = {
578 .name = "usb-serial",
582 static Property serial_properties[] = {
583 DEFINE_PROP_CHR("chardev", USBSerialState, cs),
584 DEFINE_PROP_END_OF_LIST(),
587 static void usb_serial_class_initfn(ObjectClass *klass, void *data)
589 DeviceClass *dc = DEVICE_CLASS(klass);
590 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
592 uc->init = usb_serial_initfn;
593 uc->product_desc = "QEMU USB Serial";
594 uc->usb_desc = &desc_serial;
595 uc->handle_reset = usb_serial_handle_reset;
596 uc->handle_control = usb_serial_handle_control;
597 uc->handle_data = usb_serial_handle_data;
598 uc->handle_destroy = usb_serial_handle_destroy;
599 dc->vmsd = &vmstate_usb_serial;
600 dc->props = serial_properties;
603 static const TypeInfo serial_info = {
604 .name = "usb-serial",
605 .parent = TYPE_USB_DEVICE,
606 .instance_size = sizeof(USBSerialState),
607 .class_init = usb_serial_class_initfn,
610 static Property braille_properties[] = {
611 DEFINE_PROP_CHR("chardev", USBSerialState, cs),
612 DEFINE_PROP_END_OF_LIST(),
615 static void usb_braille_class_initfn(ObjectClass *klass, void *data)
617 DeviceClass *dc = DEVICE_CLASS(klass);
618 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
620 uc->init = usb_serial_initfn;
621 uc->product_desc = "QEMU USB Braille";
622 uc->usb_desc = &desc_braille;
623 uc->handle_reset = usb_serial_handle_reset;
624 uc->handle_control = usb_serial_handle_control;
625 uc->handle_data = usb_serial_handle_data;
626 uc->handle_destroy = usb_serial_handle_destroy;
627 dc->vmsd = &vmstate_usb_serial;
628 dc->props = braille_properties;
631 static const TypeInfo braille_info = {
632 .name = "usb-braille",
633 .parent = TYPE_USB_DEVICE,
634 .instance_size = sizeof(USBSerialState),
635 .class_init = usb_braille_class_initfn,
638 static void usb_serial_register_types(void)
640 type_register_static(&serial_info);
641 usb_legacy_register("usb-serial", "serial", usb_serial_init);
642 type_register_static(&braille_info);
643 usb_legacy_register("usb-braille", "braille", usb_braille_init);
646 type_init(usb_serial_register_types)