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/osdep.h"
12 #include "qapi/error.h"
13 #include "qemu-common.h"
14 #include "qemu/cutils.h"
15 #include "qemu/error-report.h"
17 #include "hw/usb/desc.h"
18 #include "sysemu/char.h"
20 //#define DEBUG_Serial
23 #define DPRINTF(fmt, ...) \
24 do { printf("usb-serial: " fmt , ## __VA_ARGS__); } while (0)
26 #define DPRINTF(fmt, ...) do {} while(0)
33 #define FTDI_SET_MDM_CTRL 1
34 #define FTDI_SET_FLOW_CTRL 2
35 #define FTDI_SET_BAUD 3
36 #define FTDI_SET_DATA 4
37 #define FTDI_GET_MDM_ST 5
38 #define FTDI_SET_EVENT_CHR 6
39 #define FTDI_SET_ERROR_CHR 7
40 #define FTDI_SET_LATENCY 9
41 #define FTDI_GET_LATENCY 10
43 #define DeviceOutVendor ((USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_DEVICE)<<8)
44 #define DeviceInVendor ((USB_DIR_IN |USB_TYPE_VENDOR|USB_RECIP_DEVICE)<<8)
48 #define FTDI_RESET_SIO 0
49 #define FTDI_RESET_RX 1
50 #define FTDI_RESET_TX 2
55 #define FTDI_SET_DTR (FTDI_DTR << 8)
57 #define FTDI_SET_RTS (FTDI_RTS << 8)
61 #define FTDI_RTS_CTS_HS 1
62 #define FTDI_DTR_DSR_HS 2
63 #define FTDI_XON_XOFF_HS 4
67 #define FTDI_PARITY (0x7 << 8)
68 #define FTDI_ODD (0x1 << 8)
69 #define FTDI_EVEN (0x2 << 8)
70 #define FTDI_MARK (0x3 << 8)
71 #define FTDI_SPACE (0x4 << 8)
73 #define FTDI_STOP (0x3 << 11)
74 #define FTDI_STOP1 (0x0 << 11)
75 #define FTDI_STOP15 (0x1 << 11)
76 #define FTDI_STOP2 (0x2 << 11)
79 /* TODO: should be sent every 40ms */
80 #define FTDI_CTS (1<<4) // CTS line status
81 #define FTDI_DSR (1<<5) // DSR line status
82 #define FTDI_RI (1<<6) // RI line status
83 #define FTDI_RLSD (1<<7) // Receive Line Signal Detect
87 #define FTDI_DR (1<<0) // Data Ready
88 #define FTDI_OE (1<<1) // Overrun Err
89 #define FTDI_PE (1<<2) // Parity Err
90 #define FTDI_FE (1<<3) // Framing Err
91 #define FTDI_BI (1<<4) // Break Interrupt
92 #define FTDI_THRE (1<<5) // Transmitter Holding Register
93 #define FTDI_TEMT (1<<6) // Transmitter Empty
94 #define FTDI_FIFO (1<<7) // Error in FIFO
98 uint8_t recv_buf[RECV_BUF];
103 uint8_t event_trigger;
104 QEMUSerialSetParams params;
105 int latency; /* ms */
109 #define TYPE_USB_SERIAL "usb-serial-dev"
110 #define USB_SERIAL_DEV(obj) OBJECT_CHECK(USBSerialState, (obj), TYPE_USB_SERIAL)
113 STR_MANUFACTURER = 1,
119 static const USBDescStrings desc_strings = {
120 [STR_MANUFACTURER] = "QEMU",
121 [STR_PRODUCT_SERIAL] = "QEMU USB SERIAL",
122 [STR_PRODUCT_BRAILLE] = "QEMU USB BAUM BRAILLE",
123 [STR_SERIALNUMBER] = "1",
126 static const USBDescIface desc_iface0 = {
127 .bInterfaceNumber = 0,
129 .bInterfaceClass = 0xff,
130 .bInterfaceSubClass = 0xff,
131 .bInterfaceProtocol = 0xff,
132 .eps = (USBDescEndpoint[]) {
134 .bEndpointAddress = USB_DIR_IN | 0x01,
135 .bmAttributes = USB_ENDPOINT_XFER_BULK,
136 .wMaxPacketSize = 64,
138 .bEndpointAddress = USB_DIR_OUT | 0x02,
139 .bmAttributes = USB_ENDPOINT_XFER_BULK,
140 .wMaxPacketSize = 64,
145 static const USBDescDevice desc_device = {
147 .bMaxPacketSize0 = 8,
148 .bNumConfigurations = 1,
149 .confs = (USBDescConfig[]) {
152 .bConfigurationValue = 1,
153 .bmAttributes = USB_CFG_ATT_ONE,
161 static const USBDesc desc_serial = {
166 .iManufacturer = STR_MANUFACTURER,
167 .iProduct = STR_PRODUCT_SERIAL,
168 .iSerialNumber = STR_SERIALNUMBER,
170 .full = &desc_device,
174 static const USBDesc desc_braille = {
179 .iManufacturer = STR_MANUFACTURER,
180 .iProduct = STR_PRODUCT_BRAILLE,
181 .iSerialNumber = STR_SERIALNUMBER,
183 .full = &desc_device,
187 static void usb_serial_reset(USBSerialState *s)
189 /* TODO: Set flow control to none */
191 s->event_trigger = 0;
194 /* TODO: purge in char driver */
197 static void usb_serial_handle_reset(USBDevice *dev)
199 USBSerialState *s = (USBSerialState *)dev;
204 /* TODO: Reset char device, send BREAK? */
207 static uint8_t usb_get_modem_lines(USBSerialState *s)
212 if (qemu_chr_fe_ioctl(s->cs, CHR_IOCTL_SERIAL_GET_TIOCM, &flags) == -ENOTSUP)
213 return FTDI_CTS|FTDI_DSR|FTDI_RLSD;
216 if (flags & CHR_TIOCM_CTS)
218 if (flags & CHR_TIOCM_DSR)
220 if (flags & CHR_TIOCM_RI)
222 if (flags & CHR_TIOCM_CAR)
228 static void usb_serial_handle_control(USBDevice *dev, USBPacket *p,
229 int request, int value, int index, int length, uint8_t *data)
231 USBSerialState *s = (USBSerialState *)dev;
234 DPRINTF("got control %x, value %x\n",request, value);
235 ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
241 case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
244 /* Class specific requests. */
245 case DeviceOutVendor | FTDI_RESET:
253 /* TODO: purge from char device */
256 /* TODO: purge from char device */
260 case DeviceOutVendor | FTDI_SET_MDM_CTRL:
263 qemu_chr_fe_ioctl(s->cs,CHR_IOCTL_SERIAL_GET_TIOCM, &flags);
264 if (value & FTDI_SET_RTS) {
265 if (value & FTDI_RTS)
266 flags |= CHR_TIOCM_RTS;
268 flags &= ~CHR_TIOCM_RTS;
270 if (value & FTDI_SET_DTR) {
271 if (value & FTDI_DTR)
272 flags |= CHR_TIOCM_DTR;
274 flags &= ~CHR_TIOCM_DTR;
276 qemu_chr_fe_ioctl(s->cs,CHR_IOCTL_SERIAL_SET_TIOCM, &flags);
279 case DeviceOutVendor | FTDI_SET_FLOW_CTRL:
282 case DeviceOutVendor | FTDI_SET_BAUD: {
283 static const int subdivisors8[8] = { 0, 4, 2, 1, 3, 5, 6, 7 };
284 int subdivisor8 = subdivisors8[((value & 0xc000) >> 14)
285 | ((index & 1) << 2)];
286 int divisor = value & 0x3fff;
288 /* chip special cases */
289 if (divisor == 1 && subdivisor8 == 0)
291 if (divisor == 0 && subdivisor8 == 0)
294 s->params.speed = (48000000 / 2) / (8 * divisor + subdivisor8);
295 qemu_chr_fe_ioctl(s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params);
298 case DeviceOutVendor | FTDI_SET_DATA:
299 switch (value & FTDI_PARITY) {
301 s->params.parity = 'N';
304 s->params.parity = 'O';
307 s->params.parity = 'E';
310 DPRINTF("unsupported parity %d\n", value & FTDI_PARITY);
313 switch (value & FTDI_STOP) {
315 s->params.stop_bits = 1;
318 s->params.stop_bits = 2;
321 DPRINTF("unsupported stop bits %d\n", value & FTDI_STOP);
324 qemu_chr_fe_ioctl(s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params);
325 /* TODO: TX ON/OFF */
327 case DeviceInVendor | FTDI_GET_MDM_ST:
328 data[0] = usb_get_modem_lines(s) | 1;
330 p->actual_length = 2;
332 case DeviceOutVendor | FTDI_SET_EVENT_CHR:
333 /* TODO: handle it */
334 s->event_chr = value;
336 case DeviceOutVendor | FTDI_SET_ERROR_CHR:
337 /* TODO: handle it */
338 s->error_chr = value;
340 case DeviceOutVendor | FTDI_SET_LATENCY:
343 case DeviceInVendor | FTDI_GET_LATENCY:
344 data[0] = s->latency;
345 p->actual_length = 1;
349 DPRINTF("got unsupported/bogus control %x, value %x\n", request, value);
350 p->status = USB_RET_STALL;
355 static void usb_serial_handle_data(USBDevice *dev, USBPacket *p)
357 USBSerialState *s = (USBSerialState *)dev;
358 uint8_t devep = p->ep->nr;
361 int i, first_len, len;
367 for (i = 0; i < p->iov.niov; i++) {
368 iov = p->iov.iov + i;
369 qemu_chr_fe_write(s->cs, iov->iov_base, iov->iov_len);
371 p->actual_length = p->iov.size;
377 first_len = RECV_BUF - s->recv_ptr;
380 p->status = USB_RET_NAK;
383 header[0] = 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;
389 usb_packet_copy(p, header, 2);
395 if (len > s->recv_used)
398 p->status = USB_RET_NAK;
403 usb_packet_copy(p, header, 2);
404 usb_packet_copy(p, s->recv_buf + s->recv_ptr, first_len);
406 usb_packet_copy(p, s->recv_buf, len - first_len);
408 s->recv_ptr = (s->recv_ptr + len) % RECV_BUF;
412 DPRINTF("Bad token\n");
414 p->status = USB_RET_STALL;
419 static int usb_serial_can_read(void *opaque)
421 USBSerialState *s = opaque;
423 if (!s->dev.attached) {
426 return RECV_BUF - s->recv_used;
429 static void usb_serial_read(void *opaque, const uint8_t *buf, int size)
431 USBSerialState *s = opaque;
432 int first_size, start;
434 /* room in the buffer? */
435 if (size > (RECV_BUF - s->recv_used))
436 size = RECV_BUF - s->recv_used;
438 start = s->recv_ptr + s->recv_used;
439 if (start < RECV_BUF) {
440 /* copy data to end of buffer */
441 first_size = RECV_BUF - start;
442 if (first_size > size)
445 memcpy(s->recv_buf + start, buf, first_size);
447 /* wrap around to front if needed */
448 if (size > first_size)
449 memcpy(s->recv_buf, buf + first_size, size - first_size);
452 memcpy(s->recv_buf + start, buf, size);
454 s->recv_used += size;
457 static void usb_serial_event(void *opaque, int event)
459 USBSerialState *s = opaque;
462 case CHR_EVENT_BREAK:
463 s->event_trigger |= FTDI_BI;
465 case CHR_EVENT_FOCUS:
467 case CHR_EVENT_OPENED:
468 if (!s->dev.attached) {
469 usb_device_attach(&s->dev, &error_abort);
472 case CHR_EVENT_CLOSED:
473 if (s->dev.attached) {
474 usb_device_detach(&s->dev);
480 static void usb_serial_realize(USBDevice *dev, Error **errp)
482 USBSerialState *s = USB_SERIAL_DEV(dev);
483 Error *local_err = NULL;
485 usb_desc_create_serial(dev);
487 dev->auto_attach = 0;
490 error_setg(errp, "Property chardev is required");
494 usb_check_attach(dev, &local_err);
496 error_propagate(errp, local_err);
500 qemu_chr_add_handlers(s->cs, usb_serial_can_read, usb_serial_read,
501 usb_serial_event, s);
502 usb_serial_handle_reset(dev);
504 if (s->cs->be_open && !dev->attached) {
505 usb_device_attach(dev, &error_abort);
509 static USBDevice *usb_serial_init(USBBus *bus, const char *filename)
512 CharDriverState *cdrv;
513 uint32_t vendorid = 0, productid = 0;
517 while (*filename && *filename != ':') {
520 if (strstart(filename, "vendorid=", &p)) {
521 vendorid = strtol(p, &e, 16);
522 if (e == p || (*e && *e != ',' && *e != ':')) {
523 error_report("bogus vendor ID %s", p);
527 } else if (strstart(filename, "productid=", &p)) {
528 productid = strtol(p, &e, 16);
529 if (e == p || (*e && *e != ',' && *e != ':')) {
530 error_report("bogus product ID %s", p);
535 error_report("unrecognized serial USB option %s", filename);
538 while(*filename == ',')
542 error_report("character device specification needed");
547 snprintf(label, sizeof(label), "usbserial%d", index++);
548 cdrv = qemu_chr_new(label, filename, NULL);
552 dev = usb_create(bus, "usb-serial");
553 qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);
555 qdev_prop_set_uint16(&dev->qdev, "vendorid", vendorid);
557 qdev_prop_set_uint16(&dev->qdev, "productid", productid);
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);
575 static const VMStateDescription vmstate_usb_serial = {
576 .name = "usb-serial",
580 static Property serial_properties[] = {
581 DEFINE_PROP_CHR("chardev", USBSerialState, cs),
582 DEFINE_PROP_END_OF_LIST(),
585 static void usb_serial_dev_class_init(ObjectClass *klass, void *data)
587 DeviceClass *dc = DEVICE_CLASS(klass);
588 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
590 uc->realize = usb_serial_realize;
591 uc->handle_reset = usb_serial_handle_reset;
592 uc->handle_control = usb_serial_handle_control;
593 uc->handle_data = usb_serial_handle_data;
594 dc->vmsd = &vmstate_usb_serial;
595 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
598 static const TypeInfo usb_serial_dev_type_info = {
599 .name = TYPE_USB_SERIAL,
600 .parent = TYPE_USB_DEVICE,
601 .instance_size = sizeof(USBSerialState),
603 .class_init = usb_serial_dev_class_init,
606 static void usb_serial_class_initfn(ObjectClass *klass, void *data)
608 DeviceClass *dc = DEVICE_CLASS(klass);
609 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
611 uc->product_desc = "QEMU USB Serial";
612 uc->usb_desc = &desc_serial;
613 dc->props = serial_properties;
616 static const TypeInfo serial_info = {
617 .name = "usb-serial",
618 .parent = TYPE_USB_SERIAL,
619 .class_init = usb_serial_class_initfn,
622 static Property braille_properties[] = {
623 DEFINE_PROP_CHR("chardev", USBSerialState, cs),
624 DEFINE_PROP_END_OF_LIST(),
627 static void usb_braille_class_initfn(ObjectClass *klass, void *data)
629 DeviceClass *dc = DEVICE_CLASS(klass);
630 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
632 uc->product_desc = "QEMU USB Braille";
633 uc->usb_desc = &desc_braille;
634 dc->props = braille_properties;
637 static const TypeInfo braille_info = {
638 .name = "usb-braille",
639 .parent = TYPE_USB_SERIAL,
640 .class_init = usb_braille_class_initfn,
643 static void usb_serial_register_types(void)
645 type_register_static(&usb_serial_dev_type_info);
646 type_register_static(&serial_info);
647 usb_legacy_register("usb-serial", "serial", usb_serial_init);
648 type_register_static(&braille_info);
649 usb_legacy_register("usb-braille", "braille", usb_braille_init);
652 type_init(usb_serial_register_types)