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xemu/hw/usb-serial.c
Anthony Liguori 70f24fb6c6 char: rename qemu_chr_close() -> qemu_chr_delete() 
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-08-22 10:17:43 -05:00

626 lines
17 KiB
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/*
* FTDI FT232BM Device emulation
*
* Copyright (c) 2006 CodeSourcery.
* Copyright (c) 2008 Samuel Thibault <samuel.thibault@ens-lyon.org>
* Written by Paul Brook, reused for FTDI by Samuel Thibault
*
* This code is licensed under the LGPL.
*/
#include "qemu-common.h"
#include "qemu-error.h"
#include "usb.h"
#include "usb-desc.h"
#include "qemu-char.h"
//#define DEBUG_Serial
#ifdef DEBUG_Serial
#define DPRINTF(fmt, ...) \
do { printf("usb-serial: " fmt , ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) do {} while(0)
#endif
#define RECV_BUF 384
/* Commands */
#define FTDI_RESET 0
#define FTDI_SET_MDM_CTRL 1
#define FTDI_SET_FLOW_CTRL 2
#define FTDI_SET_BAUD 3
#define FTDI_SET_DATA 4
#define FTDI_GET_MDM_ST 5
#define FTDI_SET_EVENT_CHR 6
#define FTDI_SET_ERROR_CHR 7
#define FTDI_SET_LATENCY 9
#define FTDI_GET_LATENCY 10
#define DeviceOutVendor ((USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_DEVICE)<<8)
#define DeviceInVendor ((USB_DIR_IN |USB_TYPE_VENDOR|USB_RECIP_DEVICE)<<8)
/* RESET */
#define FTDI_RESET_SIO 0
#define FTDI_RESET_RX 1
#define FTDI_RESET_TX 2
/* SET_MDM_CTRL */
#define FTDI_DTR 1
#define FTDI_SET_DTR (FTDI_DTR << 8)
#define FTDI_RTS 2
#define FTDI_SET_RTS (FTDI_RTS << 8)
/* SET_FLOW_CTRL */
#define FTDI_RTS_CTS_HS 1
#define FTDI_DTR_DSR_HS 2
#define FTDI_XON_XOFF_HS 4
/* SET_DATA */
#define FTDI_PARITY (0x7 << 8)
#define FTDI_ODD (0x1 << 8)
#define FTDI_EVEN (0x2 << 8)
#define FTDI_MARK (0x3 << 8)
#define FTDI_SPACE (0x4 << 8)
#define FTDI_STOP (0x3 << 11)
#define FTDI_STOP1 (0x0 << 11)
#define FTDI_STOP15 (0x1 << 11)
#define FTDI_STOP2 (0x2 << 11)
/* GET_MDM_ST */
/* TODO: should be sent every 40ms */
#define FTDI_CTS (1<<4) // CTS line status
#define FTDI_DSR (1<<5) // DSR line status
#define FTDI_RI (1<<6) // RI line status
#define FTDI_RLSD (1<<7) // Receive Line Signal Detect
/* Status */
#define FTDI_DR (1<<0) // Data Ready
#define FTDI_OE (1<<1) // Overrun Err
#define FTDI_PE (1<<2) // Parity Err
#define FTDI_FE (1<<3) // Framing Err
#define FTDI_BI (1<<4) // Break Interrupt
#define FTDI_THRE (1<<5) // Transmitter Holding Register
#define FTDI_TEMT (1<<6) // Transmitter Empty
#define FTDI_FIFO (1<<7) // Error in FIFO
typedef struct {
USBDevice dev;
uint8_t recv_buf[RECV_BUF];
uint16_t recv_ptr;
uint16_t recv_used;
uint8_t event_chr;
uint8_t error_chr;
uint8_t event_trigger;
QEMUSerialSetParams params;
int latency; /* ms */
CharDriverState *cs;
} USBSerialState;
enum {
STR_MANUFACTURER = 1,
STR_PRODUCT_SERIAL,
STR_PRODUCT_BRAILLE,
STR_SERIALNUMBER,
};
static const USBDescStrings desc_strings = {
[STR_MANUFACTURER] = "QEMU " QEMU_VERSION,
[STR_PRODUCT_SERIAL] = "QEMU USB SERIAL",
[STR_PRODUCT_BRAILLE] = "QEMU USB BRAILLE",
[STR_SERIALNUMBER] = "1",
};
static const USBDescIface desc_iface0 = {
.bInterfaceNumber = 0,
.bNumEndpoints = 2,
.bInterfaceClass = 0xff,
.bInterfaceSubClass = 0xff,
.bInterfaceProtocol = 0xff,
.eps = (USBDescEndpoint[]) {
{
.bEndpointAddress = USB_DIR_IN | 0x01,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = 64,
},{
.bEndpointAddress = USB_DIR_OUT | 0x02,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = 64,
},
}
};
static const USBDescDevice desc_device = {
.bcdUSB = 0x0200,
.bMaxPacketSize0 = 8,
.bNumConfigurations = 1,
.confs = (USBDescConfig[]) {
{
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.bmAttributes = 0x80,
.bMaxPower = 50,
.nif = 1,
.ifs = &desc_iface0,
},
},
};
static const USBDesc desc_serial = {
.id = {
.idVendor = 0x0403,
.idProduct = 0x6001,
.bcdDevice = 0x0400,
.iManufacturer = STR_MANUFACTURER,
.iProduct = STR_PRODUCT_SERIAL,
.iSerialNumber = STR_SERIALNUMBER,
},
.full = &desc_device,
.str = desc_strings,
};
static const USBDesc desc_braille = {
.id = {
.idVendor = 0x0403,
.idProduct = 0xfe72,
.bcdDevice = 0x0400,
.iManufacturer = STR_MANUFACTURER,
.iProduct = STR_PRODUCT_BRAILLE,
.iSerialNumber = STR_SERIALNUMBER,
},
.full = &desc_device,
.str = desc_strings,
};
static void usb_serial_reset(USBSerialState *s)
{
/* TODO: Set flow control to none */
s->event_chr = 0x0d;
s->event_trigger = 0;
s->recv_ptr = 0;
s->recv_used = 0;
/* TODO: purge in char driver */
}
static void usb_serial_handle_reset(USBDevice *dev)
{
USBSerialState *s = (USBSerialState *)dev;
DPRINTF("Reset\n");
usb_serial_reset(s);
/* TODO: Reset char device, send BREAK? */
}
static uint8_t usb_get_modem_lines(USBSerialState *s)
{
int flags;
uint8_t ret;
if (qemu_chr_fe_ioctl(s->cs, CHR_IOCTL_SERIAL_GET_TIOCM, &flags) == -ENOTSUP)
return FTDI_CTS|FTDI_DSR|FTDI_RLSD;
ret = 0;
if (flags & CHR_TIOCM_CTS)
ret |= FTDI_CTS;
if (flags & CHR_TIOCM_DSR)
ret |= FTDI_DSR;
if (flags & CHR_TIOCM_RI)
ret |= FTDI_RI;
if (flags & CHR_TIOCM_CAR)
ret |= FTDI_RLSD;
return ret;
}
static int usb_serial_handle_control(USBDevice *dev, USBPacket *p,
int request, int value, int index, int length, uint8_t *data)
{
USBSerialState *s = (USBSerialState *)dev;
int ret;
DPRINTF("got control %x, value %x\n",request, value);
ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
if (ret >= 0) {
return ret;
}
ret = 0;
switch (request) {
case DeviceRequest | USB_REQ_GET_INTERFACE:
data[0] = 0;
ret = 1;
break;
case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
ret = 0;
break;
case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
ret = 0;
break;
/* Class specific requests. */
case DeviceOutVendor | FTDI_RESET:
switch (value) {
case FTDI_RESET_SIO:
usb_serial_reset(s);
break;
case FTDI_RESET_RX:
s->recv_ptr = 0;
s->recv_used = 0;
/* TODO: purge from char device */
break;
case FTDI_RESET_TX:
/* TODO: purge from char device */
break;
}
break;
case DeviceOutVendor | FTDI_SET_MDM_CTRL:
{
static int flags;
qemu_chr_fe_ioctl(s->cs,CHR_IOCTL_SERIAL_GET_TIOCM, &flags);
if (value & FTDI_SET_RTS) {
if (value & FTDI_RTS)
flags |= CHR_TIOCM_RTS;
else
flags &= ~CHR_TIOCM_RTS;
}
if (value & FTDI_SET_DTR) {
if (value & FTDI_DTR)
flags |= CHR_TIOCM_DTR;
else
flags &= ~CHR_TIOCM_DTR;
}
qemu_chr_fe_ioctl(s->cs,CHR_IOCTL_SERIAL_SET_TIOCM, &flags);
break;
}
case DeviceOutVendor | FTDI_SET_FLOW_CTRL:
/* TODO: ioctl */
break;
case DeviceOutVendor | FTDI_SET_BAUD: {
static const int subdivisors8[8] = { 0, 4, 2, 1, 3, 5, 6, 7 };
int subdivisor8 = subdivisors8[((value & 0xc000) >> 14)
| ((index & 1) << 2)];
int divisor = value & 0x3fff;
/* chip special cases */
if (divisor == 1 && subdivisor8 == 0)
subdivisor8 = 4;
if (divisor == 0 && subdivisor8 == 0)
divisor = 1;
s->params.speed = (48000000 / 2) / (8 * divisor + subdivisor8);
qemu_chr_fe_ioctl(s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params);
break;
}
case DeviceOutVendor | FTDI_SET_DATA:
switch (value & FTDI_PARITY) {
case 0:
s->params.parity = 'N';
break;
case FTDI_ODD:
s->params.parity = 'O';
break;
case FTDI_EVEN:
s->params.parity = 'E';
break;
default:
DPRINTF("unsupported parity %d\n", value & FTDI_PARITY);
goto fail;
}
switch (value & FTDI_STOP) {
case FTDI_STOP1:
s->params.stop_bits = 1;
break;
case FTDI_STOP2:
s->params.stop_bits = 2;
break;
default:
DPRINTF("unsupported stop bits %d\n", value & FTDI_STOP);
goto fail;
}
qemu_chr_fe_ioctl(s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params);
/* TODO: TX ON/OFF */
break;
case DeviceInVendor | FTDI_GET_MDM_ST:
data[0] = usb_get_modem_lines(s) | 1;
data[1] = 0;
ret = 2;
break;
case DeviceOutVendor | FTDI_SET_EVENT_CHR:
/* TODO: handle it */
s->event_chr = value;
break;
case DeviceOutVendor | FTDI_SET_ERROR_CHR:
/* TODO: handle it */
s->error_chr = value;
break;
case DeviceOutVendor | FTDI_SET_LATENCY:
s->latency = value;
break;
case DeviceInVendor | FTDI_GET_LATENCY:
data[0] = s->latency;
ret = 1;
break;
default:
fail:
DPRINTF("got unsupported/bogus control %x, value %x\n", request, value);
ret = USB_RET_STALL;
break;
}
return ret;
}
static int usb_serial_handle_data(USBDevice *dev, USBPacket *p)
{
USBSerialState *s = (USBSerialState *)dev;
int i, ret = 0;
uint8_t devep = p->devep;
struct iovec *iov;
uint8_t header[2];
int first_len, len;
switch (p->pid) {
case USB_TOKEN_OUT:
if (devep != 2)
goto fail;
for (i = 0; i < p->iov.niov; i++) {
iov = p->iov.iov + i;
qemu_chr_fe_write(s->cs, iov->iov_base, iov->iov_len);
}
break;
case USB_TOKEN_IN:
if (devep != 1)
goto fail;
first_len = RECV_BUF - s->recv_ptr;
len = p->iov.size;
if (len <= 2) {
ret = USB_RET_NAK;
break;
}
header[0] = usb_get_modem_lines(s) | 1;
/* We do not have the uart details */
/* handle serial break */
if (s->event_trigger && s->event_trigger & FTDI_BI) {
s->event_trigger &= ~FTDI_BI;
header[1] = FTDI_BI;
usb_packet_copy(p, header, 2);
ret = 2;
break;
} else {
header[1] = 0;
}
len -= 2;
if (len > s->recv_used)
len = s->recv_used;
if (!len) {
ret = USB_RET_NAK;
break;
}
if (first_len > len)
first_len = len;
usb_packet_copy(p, header, 2);
usb_packet_copy(p, s->recv_buf + s->recv_ptr, first_len);
if (len > first_len)
usb_packet_copy(p, s->recv_buf, len - first_len);
s->recv_used -= len;
s->recv_ptr = (s->recv_ptr + len) % RECV_BUF;
ret = len + 2;
break;
default:
DPRINTF("Bad token\n");
fail:
ret = USB_RET_STALL;
break;
}
return ret;
}
static void usb_serial_handle_destroy(USBDevice *dev)
{
USBSerialState *s = (USBSerialState *)dev;
qemu_chr_delete(s->cs);
}
static int usb_serial_can_read(void *opaque)
{
USBSerialState *s = opaque;
return RECV_BUF - s->recv_used;
}
static void usb_serial_read(void *opaque, const uint8_t *buf, int size)
{
USBSerialState *s = opaque;
int first_size, start;
/* room in the buffer? */
if (size > (RECV_BUF - s->recv_used))
size = RECV_BUF - s->recv_used;
start = s->recv_ptr + s->recv_used;
if (start < RECV_BUF) {
/* copy data to end of buffer */
first_size = RECV_BUF - start;
if (first_size > size)
first_size = size;
memcpy(s->recv_buf + start, buf, first_size);
/* wrap around to front if needed */
if (size > first_size)
memcpy(s->recv_buf, buf + first_size, size - first_size);
} else {
start -= RECV_BUF;
memcpy(s->recv_buf + start, buf, size);
}
s->recv_used += size;
}
static void usb_serial_event(void *opaque, int event)
{
USBSerialState *s = opaque;
switch (event) {
case CHR_EVENT_BREAK:
s->event_trigger |= FTDI_BI;
break;
case CHR_EVENT_FOCUS:
break;
case CHR_EVENT_OPENED:
usb_serial_reset(s);
/* TODO: Reset USB port */
break;
}
}
static int usb_serial_initfn(USBDevice *dev)
{
USBSerialState *s = DO_UPCAST(USBSerialState, dev, dev);
usb_desc_init(dev);
if (!s->cs) {
error_report("Property chardev is required");
return -1;
}
qemu_chr_add_handlers(s->cs, usb_serial_can_read, usb_serial_read,
usb_serial_event, s);
usb_serial_handle_reset(dev);
return 0;
}
static USBDevice *usb_serial_init(const char *filename)
{
USBDevice *dev;
CharDriverState *cdrv;
uint32_t vendorid = 0, productid = 0;
char label[32];
static int index;
while (*filename && *filename != ':') {
const char *p;
char *e;
if (strstart(filename, "vendorid=", &p)) {
vendorid = strtol(p, &e, 16);
if (e == p || (*e && *e != ',' && *e != ':')) {
error_report("bogus vendor ID %s", p);
return NULL;
}
filename = e;
} else if (strstart(filename, "productid=", &p)) {
productid = strtol(p, &e, 16);
if (e == p || (*e && *e != ',' && *e != ':')) {
error_report("bogus product ID %s", p);
return NULL;
}
filename = e;
} else {
error_report("unrecognized serial USB option %s", filename);
return NULL;
}
while(*filename == ',')
filename++;
}
if (!*filename) {
error_report("character device specification needed");
return NULL;
}
filename++;
snprintf(label, sizeof(label), "usbserial%d", index++);
cdrv = qemu_chr_new(label, filename, NULL);
if (!cdrv)
return NULL;
dev = usb_create(NULL /* FIXME */, "usb-serial");
if (!dev) {
return NULL;
}
qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);
if (vendorid)
qdev_prop_set_uint16(&dev->qdev, "vendorid", vendorid);
if (productid)
qdev_prop_set_uint16(&dev->qdev, "productid", productid);
qdev_init_nofail(&dev->qdev);
return dev;
}
static USBDevice *usb_braille_init(const char *unused)
{
USBDevice *dev;
CharDriverState *cdrv;
cdrv = qemu_chr_new("braille", "braille", NULL);
if (!cdrv)
return NULL;
dev = usb_create(NULL /* FIXME */, "usb-braille");
qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);
qdev_init_nofail(&dev->qdev);
return dev;
}
static const VMStateDescription vmstate_usb_serial = {
.name = "usb-serial",
.unmigratable = 1,
};
static struct USBDeviceInfo serial_info = {
.product_desc = "QEMU USB Serial",
.qdev.name = "usb-serial",
.qdev.size = sizeof(USBSerialState),
.qdev.vmsd = &vmstate_usb_serial,
.usb_desc = &desc_serial,
.init = usb_serial_initfn,
.handle_packet = usb_generic_handle_packet,
.handle_reset = usb_serial_handle_reset,
.handle_control = usb_serial_handle_control,
.handle_data = usb_serial_handle_data,
.handle_destroy = usb_serial_handle_destroy,
.usbdevice_name = "serial",
.usbdevice_init = usb_serial_init,
.qdev.props = (Property[]) {
DEFINE_PROP_CHR("chardev", USBSerialState, cs),
DEFINE_PROP_END_OF_LIST(),
},
};
static struct USBDeviceInfo braille_info = {
.product_desc = "QEMU USB Braille",
.qdev.name = "usb-braille",
.qdev.size = sizeof(USBSerialState),
.qdev.vmsd = &vmstate_usb_serial,
.usb_desc = &desc_braille,
.init = usb_serial_initfn,
.handle_packet = usb_generic_handle_packet,
.handle_reset = usb_serial_handle_reset,
.handle_control = usb_serial_handle_control,
.handle_data = usb_serial_handle_data,
.handle_destroy = usb_serial_handle_destroy,
.usbdevice_name = "braille",
.usbdevice_init = usb_braille_init,
.qdev.props = (Property[]) {
DEFINE_PROP_CHR("chardev", USBSerialState, cs),
DEFINE_PROP_END_OF_LIST(),
},
};
static void usb_serial_register_devices(void)
{
usb_qdev_register(&serial_info);
usb_qdev_register(&braille_info);
}
device_init(usb_serial_register_devices)
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