585 lines
17 KiB
C
585 lines
17 KiB
C
/*
|
|
* 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 licenced under the LGPL.
|
|
*/
|
|
|
|
#include "qemu-common.h"
|
|
#include "usb.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;
|
|
uint16_t vendorid;
|
|
uint16_t productid;
|
|
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;
|
|
|
|
static const uint8_t qemu_serial_dev_descriptor[] = {
|
|
0x12, /* u8 bLength; */
|
|
0x01, /* u8 bDescriptorType; Device */
|
|
0x00, 0x02, /* u16 bcdUSB; v2.0 */
|
|
|
|
0x00, /* u8 bDeviceClass; */
|
|
0x00, /* u8 bDeviceSubClass; */
|
|
0x00, /* u8 bDeviceProtocol; [ low/full speeds only ] */
|
|
0x08, /* u8 bMaxPacketSize0; 8 Bytes */
|
|
|
|
/* Vendor and product id are arbitrary. */
|
|
0x03, 0x04, /* u16 idVendor; */
|
|
0x00, 0xFF, /* u16 idProduct; */
|
|
0x00, 0x04, /* u16 bcdDevice */
|
|
|
|
0x01, /* u8 iManufacturer; */
|
|
0x02, /* u8 iProduct; */
|
|
0x03, /* u8 iSerialNumber; */
|
|
0x01 /* u8 bNumConfigurations; */
|
|
};
|
|
|
|
static const uint8_t qemu_serial_config_descriptor[] = {
|
|
|
|
/* one configuration */
|
|
0x09, /* u8 bLength; */
|
|
0x02, /* u8 bDescriptorType; Configuration */
|
|
0x20, 0x00, /* u16 wTotalLength; */
|
|
0x01, /* u8 bNumInterfaces; (1) */
|
|
0x01, /* u8 bConfigurationValue; */
|
|
0x00, /* u8 iConfiguration; */
|
|
0x80, /* u8 bmAttributes;
|
|
Bit 7: must be set,
|
|
6: Self-powered,
|
|
5: Remote wakeup,
|
|
4..0: resvd */
|
|
100/2, /* u8 MaxPower; */
|
|
|
|
/* one interface */
|
|
0x09, /* u8 if_bLength; */
|
|
0x04, /* u8 if_bDescriptorType; Interface */
|
|
0x00, /* u8 if_bInterfaceNumber; */
|
|
0x00, /* u8 if_bAlternateSetting; */
|
|
0x02, /* u8 if_bNumEndpoints; */
|
|
0xff, /* u8 if_bInterfaceClass; Vendor Specific */
|
|
0xff, /* u8 if_bInterfaceSubClass; Vendor Specific */
|
|
0xff, /* u8 if_bInterfaceProtocol; Vendor Specific */
|
|
0x02, /* u8 if_iInterface; */
|
|
|
|
/* Bulk-In endpoint */
|
|
0x07, /* u8 ep_bLength; */
|
|
0x05, /* u8 ep_bDescriptorType; Endpoint */
|
|
0x81, /* u8 ep_bEndpointAddress; IN Endpoint 1 */
|
|
0x02, /* u8 ep_bmAttributes; Bulk */
|
|
0x40, 0x00, /* u16 ep_wMaxPacketSize; */
|
|
0x00, /* u8 ep_bInterval; */
|
|
|
|
/* Bulk-Out endpoint */
|
|
0x07, /* u8 ep_bLength; */
|
|
0x05, /* u8 ep_bDescriptorType; Endpoint */
|
|
0x02, /* u8 ep_bEndpointAddress; OUT Endpoint 2 */
|
|
0x02, /* u8 ep_bmAttributes; Bulk */
|
|
0x40, 0x00, /* u16 ep_wMaxPacketSize; */
|
|
0x00 /* u8 ep_bInterval; */
|
|
};
|
|
|
|
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_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, int request, int value,
|
|
int index, int length, uint8_t *data)
|
|
{
|
|
USBSerialState *s = (USBSerialState *)dev;
|
|
int ret = 0;
|
|
|
|
//DPRINTF("got control %x, value %x\n",request, value);
|
|
switch (request) {
|
|
case DeviceRequest | USB_REQ_GET_STATUS:
|
|
data[0] = (0 << USB_DEVICE_SELF_POWERED) |
|
|
(dev->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP);
|
|
data[1] = 0x00;
|
|
ret = 2;
|
|
break;
|
|
case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
|
|
if (value == USB_DEVICE_REMOTE_WAKEUP) {
|
|
dev->remote_wakeup = 0;
|
|
} else {
|
|
goto fail;
|
|
}
|
|
ret = 0;
|
|
break;
|
|
case DeviceOutRequest | USB_REQ_SET_FEATURE:
|
|
if (value == USB_DEVICE_REMOTE_WAKEUP) {
|
|
dev->remote_wakeup = 1;
|
|
} else {
|
|
goto fail;
|
|
}
|
|
ret = 0;
|
|
break;
|
|
case DeviceOutRequest | USB_REQ_SET_ADDRESS:
|
|
dev->addr = value;
|
|
ret = 0;
|
|
break;
|
|
case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
|
|
switch(value >> 8) {
|
|
case USB_DT_DEVICE:
|
|
memcpy(data, qemu_serial_dev_descriptor,
|
|
sizeof(qemu_serial_dev_descriptor));
|
|
data[8] = s->vendorid & 0xff;
|
|
data[9] = ((s->vendorid) >> 8) & 0xff;
|
|
data[10] = s->productid & 0xff;
|
|
data[11] = ((s->productid) >> 8) & 0xff;
|
|
ret = sizeof(qemu_serial_dev_descriptor);
|
|
break;
|
|
case USB_DT_CONFIG:
|
|
memcpy(data, qemu_serial_config_descriptor,
|
|
sizeof(qemu_serial_config_descriptor));
|
|
ret = sizeof(qemu_serial_config_descriptor);
|
|
break;
|
|
case USB_DT_STRING:
|
|
switch(value & 0xff) {
|
|
case 0:
|
|
/* language ids */
|
|
data[0] = 4;
|
|
data[1] = 3;
|
|
data[2] = 0x09;
|
|
data[3] = 0x04;
|
|
ret = 4;
|
|
break;
|
|
case 1:
|
|
/* vendor description */
|
|
ret = set_usb_string(data, "QEMU " QEMU_VERSION);
|
|
break;
|
|
case 2:
|
|
/* product description */
|
|
ret = set_usb_string(data, "QEMU USB SERIAL");
|
|
break;
|
|
case 3:
|
|
/* serial number */
|
|
ret = set_usb_string(data, "1");
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
break;
|
|
case DeviceRequest | USB_REQ_GET_CONFIGURATION:
|
|
data[0] = 1;
|
|
ret = 1;
|
|
break;
|
|
case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
|
|
ret = 0;
|
|
break;
|
|
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_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_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_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_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 ret = 0;
|
|
uint8_t devep = p->devep;
|
|
uint8_t *data = p->data;
|
|
int len = p->len;
|
|
int first_len;
|
|
|
|
switch (p->pid) {
|
|
case USB_TOKEN_OUT:
|
|
if (devep != 2)
|
|
goto fail;
|
|
qemu_chr_write(s->cs, data, len);
|
|
break;
|
|
|
|
case USB_TOKEN_IN:
|
|
if (devep != 1)
|
|
goto fail;
|
|
first_len = RECV_BUF - s->recv_ptr;
|
|
if (len <= 2) {
|
|
ret = USB_RET_NAK;
|
|
break;
|
|
}
|
|
*data++ = usb_get_modem_lines(s) | 1;
|
|
/* We do not have the uart details */
|
|
*data++ = 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;
|
|
memcpy(data, s->recv_buf + s->recv_ptr, first_len);
|
|
if (len > first_len)
|
|
memcpy(data + first_len, 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_close(s->cs);
|
|
qemu_free(s);
|
|
}
|
|
|
|
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 = RECV_BUF - s->recv_ptr;
|
|
if (first_size > size)
|
|
first_size = size;
|
|
memcpy(s->recv_buf + s->recv_ptr + s->recv_used, buf, first_size);
|
|
if (size > first_size)
|
|
memcpy(s->recv_buf, buf + first_size, size - first_size);
|
|
s->recv_used += size;
|
|
}
|
|
|
|
static void usb_serial_event(void *opaque, int event)
|
|
{
|
|
USBSerialState *s = opaque;
|
|
|
|
switch (event) {
|
|
case CHR_EVENT_BREAK:
|
|
/* TODO: Send Break to USB */
|
|
break;
|
|
case CHR_EVENT_FOCUS:
|
|
break;
|
|
case CHR_EVENT_RESET:
|
|
usb_serial_reset(s);
|
|
/* TODO: Reset USB port */
|
|
break;
|
|
}
|
|
}
|
|
|
|
USBDevice *usb_serial_init(const char *filename)
|
|
{
|
|
USBSerialState *s;
|
|
CharDriverState *cdrv;
|
|
unsigned short vendorid = 0x0403, productid = 0x6001;
|
|
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 != ':')) {
|
|
printf("bogus vendor ID %s\n", p);
|
|
return NULL;
|
|
}
|
|
filename = e;
|
|
} else if (strstart(filename, "productid=", &p)) {
|
|
productid = strtol(p, &e, 16);
|
|
if (e == p || (*e && *e != ',' && *e != ':')) {
|
|
printf("bogus product ID %s\n", p);
|
|
return NULL;
|
|
}
|
|
filename = e;
|
|
} else {
|
|
printf("unrecognized serial USB option %s\n", filename);
|
|
return NULL;
|
|
}
|
|
while(*filename == ',')
|
|
filename++;
|
|
}
|
|
if (!*filename) {
|
|
printf("character device specification needed\n");
|
|
return NULL;
|
|
}
|
|
filename++;
|
|
s = qemu_mallocz(sizeof(USBSerialState));
|
|
|
|
snprintf(label, sizeof(label), "usbserial%d", index++);
|
|
cdrv = qemu_chr_open(label, filename, NULL);
|
|
if (!cdrv)
|
|
goto fail;
|
|
s->cs = cdrv;
|
|
qemu_chr_add_handlers(cdrv, usb_serial_can_read, usb_serial_read, usb_serial_event, s);
|
|
|
|
s->dev.speed = USB_SPEED_FULL;
|
|
s->dev.handle_packet = usb_generic_handle_packet;
|
|
|
|
s->dev.handle_reset = usb_serial_handle_reset;
|
|
s->dev.handle_control = usb_serial_handle_control;
|
|
s->dev.handle_data = usb_serial_handle_data;
|
|
s->dev.handle_destroy = usb_serial_handle_destroy;
|
|
|
|
s->vendorid = vendorid;
|
|
s->productid = productid;
|
|
|
|
snprintf(s->dev.devname, sizeof(s->dev.devname), "QEMU USB Serial(%.16s)",
|
|
filename);
|
|
|
|
usb_serial_handle_reset((USBDevice *)s);
|
|
return (USBDevice *)s;
|
|
fail:
|
|
qemu_free(s);
|
|
return NULL;
|
|
}
|