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.h"
15 #include "qemu-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 " QEMU_VERSION,
115 [STR_PRODUCT_SERIAL] = "QEMU USB SERIAL",
116 [STR_PRODUCT_BRAILLE] = "QEMU USB 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_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 int 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);
236 case DeviceRequest | USB_REQ_GET_INTERFACE:
240 case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
243 case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
247 /* Class specific requests. */
248 case DeviceOutVendor | FTDI_RESET:
256 /* TODO: purge from char device */
259 /* TODO: purge from char device */
263 case DeviceOutVendor | FTDI_SET_MDM_CTRL:
266 qemu_chr_ioctl(s->cs,CHR_IOCTL_SERIAL_GET_TIOCM, &flags);
267 if (value & FTDI_SET_RTS) {
268 if (value & FTDI_RTS)
269 flags |= CHR_TIOCM_RTS;
271 flags &= ~CHR_TIOCM_RTS;
273 if (value & FTDI_SET_DTR) {
274 if (value & FTDI_DTR)
275 flags |= CHR_TIOCM_DTR;
277 flags &= ~CHR_TIOCM_DTR;
279 qemu_chr_ioctl(s->cs,CHR_IOCTL_SERIAL_SET_TIOCM, &flags);
282 case DeviceOutVendor | FTDI_SET_FLOW_CTRL:
285 case DeviceOutVendor | FTDI_SET_BAUD: {
286 static const int subdivisors8[8] = { 0, 4, 2, 1, 3, 5, 6, 7 };
287 int subdivisor8 = subdivisors8[((value & 0xc000) >> 14)
288 | ((index & 1) << 2)];
289 int divisor = value & 0x3fff;
291 /* chip special cases */
292 if (divisor == 1 && subdivisor8 == 0)
294 if (divisor == 0 && subdivisor8 == 0)
297 s->params.speed = (48000000 / 2) / (8 * divisor + subdivisor8);
298 qemu_chr_ioctl(s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params);
301 case DeviceOutVendor | FTDI_SET_DATA:
302 switch (value & FTDI_PARITY) {
304 s->params.parity = 'N';
307 s->params.parity = 'O';
310 s->params.parity = 'E';
313 DPRINTF("unsupported parity %d\n", value & FTDI_PARITY);
316 switch (value & FTDI_STOP) {
318 s->params.stop_bits = 1;
321 s->params.stop_bits = 2;
324 DPRINTF("unsupported stop bits %d\n", value & FTDI_STOP);
327 qemu_chr_ioctl(s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params);
328 /* TODO: TX ON/OFF */
330 case DeviceInVendor | FTDI_GET_MDM_ST:
331 data[0] = usb_get_modem_lines(s) | 1;
335 case DeviceOutVendor | FTDI_SET_EVENT_CHR:
336 /* TODO: handle it */
337 s->event_chr = value;
339 case DeviceOutVendor | FTDI_SET_ERROR_CHR:
340 /* TODO: handle it */
341 s->error_chr = value;
343 case DeviceOutVendor | FTDI_SET_LATENCY:
346 case DeviceInVendor | FTDI_GET_LATENCY:
347 data[0] = s->latency;
352 DPRINTF("got unsupported/bogus control %x, value %x\n", request, value);
359 static int usb_serial_handle_data(USBDevice *dev, USBPacket *p)
361 USBSerialState *s = (USBSerialState *)dev;
363 uint8_t devep = p->devep;
364 uint8_t *data = p->data;
372 qemu_chr_write(s->cs, data, len);
378 first_len = RECV_BUF - s->recv_ptr;
383 *data++ = usb_get_modem_lines(s) | 1;
384 /* We do not have the uart details */
385 /* handle serial break */
386 if (s->event_trigger && s->event_trigger & FTDI_BI) {
387 s->event_trigger &= ~FTDI_BI;
395 if (len > s->recv_used)
403 memcpy(data, s->recv_buf + s->recv_ptr, first_len);
405 memcpy(data + first_len, s->recv_buf, len - first_len);
407 s->recv_ptr = (s->recv_ptr + len) % RECV_BUF;
412 DPRINTF("Bad token\n");
421 static void usb_serial_handle_destroy(USBDevice *dev)
423 USBSerialState *s = (USBSerialState *)dev;
425 qemu_chr_close(s->cs);
428 static int usb_serial_can_read(void *opaque)
430 USBSerialState *s = opaque;
431 return RECV_BUF - s->recv_used;
434 static void usb_serial_read(void *opaque, const uint8_t *buf, int size)
436 USBSerialState *s = opaque;
437 int first_size, start;
439 /* room in the buffer? */
440 if (size > (RECV_BUF - s->recv_used))
441 size = RECV_BUF - s->recv_used;
443 start = s->recv_ptr + s->recv_used;
444 if (start < RECV_BUF) {
445 /* copy data to end of buffer */
446 first_size = RECV_BUF - start;
447 if (first_size > size)
450 memcpy(s->recv_buf + start, buf, first_size);
452 /* wrap around to front if needed */
453 if (size > first_size)
454 memcpy(s->recv_buf, buf + first_size, size - first_size);
457 memcpy(s->recv_buf + start, buf, size);
459 s->recv_used += size;
462 static void usb_serial_event(void *opaque, int event)
464 USBSerialState *s = opaque;
467 case CHR_EVENT_BREAK:
468 s->event_trigger |= FTDI_BI;
470 case CHR_EVENT_FOCUS:
472 case CHR_EVENT_OPENED:
474 /* TODO: Reset USB port */
479 static int usb_serial_initfn(USBDevice *dev)
481 USBSerialState *s = DO_UPCAST(USBSerialState, dev, dev);
486 error_report("Property chardev is required");
490 qemu_chr_add_handlers(s->cs, usb_serial_can_read, usb_serial_read,
491 usb_serial_event, s);
492 usb_serial_handle_reset(dev);
496 static USBDevice *usb_serial_init(const char *filename)
499 CharDriverState *cdrv;
500 uint32_t vendorid = 0, productid = 0;
504 while (*filename && *filename != ':') {
507 if (strstart(filename, "vendorid=", &p)) {
508 vendorid = strtol(p, &e, 16);
509 if (e == p || (*e && *e != ',' && *e != ':')) {
510 error_report("bogus vendor ID %s", p);
514 } else if (strstart(filename, "productid=", &p)) {
515 productid = strtol(p, &e, 16);
516 if (e == p || (*e && *e != ',' && *e != ':')) {
517 error_report("bogus product ID %s", p);
522 error_report("unrecognized serial USB option %s", filename);
525 while(*filename == ',')
529 error_report("character device specification needed");
534 snprintf(label, sizeof(label), "usbserial%d", index++);
535 cdrv = qemu_chr_open(label, filename, NULL);
539 dev = usb_create(NULL /* FIXME */, "usb-serial");
543 qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);
545 qdev_prop_set_uint16(&dev->qdev, "vendorid", vendorid);
547 qdev_prop_set_uint16(&dev->qdev, "productid", productid);
548 qdev_init_nofail(&dev->qdev);
553 static USBDevice *usb_braille_init(const char *unused)
556 CharDriverState *cdrv;
558 cdrv = qemu_chr_open("braille", "braille", NULL);
562 dev = usb_create(NULL /* FIXME */, "usb-braille");
563 qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);
564 qdev_init_nofail(&dev->qdev);
569 static const VMStateDescription vmstate_usb_serial = {
570 .name = "usb-serial",
574 static struct USBDeviceInfo serial_info = {
575 .product_desc = "QEMU USB Serial",
576 .qdev.name = "usb-serial",
577 .qdev.size = sizeof(USBSerialState),
578 .qdev.vmsd = &vmstate_usb_serial,
579 .usb_desc = &desc_serial,
580 .init = usb_serial_initfn,
581 .handle_packet = usb_generic_handle_packet,
582 .handle_reset = usb_serial_handle_reset,
583 .handle_control = usb_serial_handle_control,
584 .handle_data = usb_serial_handle_data,
585 .handle_destroy = usb_serial_handle_destroy,
586 .usbdevice_name = "serial",
587 .usbdevice_init = usb_serial_init,
588 .qdev.props = (Property[]) {
589 DEFINE_PROP_CHR("chardev", USBSerialState, cs),
590 DEFINE_PROP_END_OF_LIST(),
594 static struct USBDeviceInfo braille_info = {
595 .product_desc = "QEMU USB Braille",
596 .qdev.name = "usb-braille",
597 .qdev.size = sizeof(USBSerialState),
598 .qdev.vmsd = &vmstate_usb_serial,
599 .usb_desc = &desc_braille,
600 .init = usb_serial_initfn,
601 .handle_packet = usb_generic_handle_packet,
602 .handle_reset = usb_serial_handle_reset,
603 .handle_control = usb_serial_handle_control,
604 .handle_data = usb_serial_handle_data,
605 .handle_destroy = usb_serial_handle_destroy,
606 .usbdevice_name = "braille",
607 .usbdevice_init = usb_braille_init,
608 .qdev.props = (Property[]) {
609 DEFINE_PROP_CHR("chardev", USBSerialState, cs),
610 DEFINE_PROP_END_OF_LIST(),
614 static void usb_serial_register_devices(void)
616 usb_qdev_register(&serial_info);
617 usb_qdev_register(&braille_info);
619 device_init(usb_serial_register_devices)