root / hw / usb-serial.c @ d44168ff
History | View | Annotate | Download (19.4 kB)
| 1 |
/*
|
|---|---|
| 2 |
* FTDI FT232BM Device emulation
|
| 3 |
*
|
| 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
|
| 7 |
*
|
| 8 |
* This code is licenced under the LGPL.
|
| 9 |
*/
|
| 10 |
|
| 11 |
#include "qemu-common.h" |
| 12 |
#include "usb.h" |
| 13 |
#include "qemu-char.h" |
| 14 |
|
| 15 |
//#define DEBUG_Serial
|
| 16 |
|
| 17 |
#ifdef DEBUG_Serial
|
| 18 |
#define DPRINTF(fmt, ...) \
|
| 19 |
do { printf("usb-serial: " fmt , ## __VA_ARGS__); } while (0) |
| 20 |
#else
|
| 21 |
#define DPRINTF(fmt, ...) do {} while(0) |
| 22 |
#endif
|
| 23 |
|
| 24 |
#define RECV_BUF 384 |
| 25 |
|
| 26 |
/* Commands */
|
| 27 |
#define FTDI_RESET 0 |
| 28 |
#define FTDI_SET_MDM_CTRL 1 |
| 29 |
#define FTDI_SET_FLOW_CTRL 2 |
| 30 |
#define FTDI_SET_BAUD 3 |
| 31 |
#define FTDI_SET_DATA 4 |
| 32 |
#define FTDI_GET_MDM_ST 5 |
| 33 |
#define FTDI_SET_EVENT_CHR 6 |
| 34 |
#define FTDI_SET_ERROR_CHR 7 |
| 35 |
#define FTDI_SET_LATENCY 9 |
| 36 |
#define FTDI_GET_LATENCY 10 |
| 37 |
|
| 38 |
#define DeviceOutVendor ((USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_DEVICE)<<8) |
| 39 |
#define DeviceInVendor ((USB_DIR_IN |USB_TYPE_VENDOR|USB_RECIP_DEVICE)<<8) |
| 40 |
|
| 41 |
/* RESET */
|
| 42 |
|
| 43 |
#define FTDI_RESET_SIO 0 |
| 44 |
#define FTDI_RESET_RX 1 |
| 45 |
#define FTDI_RESET_TX 2 |
| 46 |
|
| 47 |
/* SET_MDM_CTRL */
|
| 48 |
|
| 49 |
#define FTDI_DTR 1 |
| 50 |
#define FTDI_SET_DTR (FTDI_DTR << 8) |
| 51 |
#define FTDI_RTS 2 |
| 52 |
#define FTDI_SET_RTS (FTDI_RTS << 8) |
| 53 |
|
| 54 |
/* SET_FLOW_CTRL */
|
| 55 |
|
| 56 |
#define FTDI_RTS_CTS_HS 1 |
| 57 |
#define FTDI_DTR_DSR_HS 2 |
| 58 |
#define FTDI_XON_XOFF_HS 4 |
| 59 |
|
| 60 |
/* SET_DATA */
|
| 61 |
|
| 62 |
#define FTDI_PARITY (0x7 << 8) |
| 63 |
#define FTDI_ODD (0x1 << 8) |
| 64 |
#define FTDI_EVEN (0x2 << 8) |
| 65 |
#define FTDI_MARK (0x3 << 8) |
| 66 |
#define FTDI_SPACE (0x4 << 8) |
| 67 |
|
| 68 |
#define FTDI_STOP (0x3 << 11) |
| 69 |
#define FTDI_STOP1 (0x0 << 11) |
| 70 |
#define FTDI_STOP15 (0x1 << 11) |
| 71 |
#define FTDI_STOP2 (0x2 << 11) |
| 72 |
|
| 73 |
/* GET_MDM_ST */
|
| 74 |
/* TODO: should be sent every 40ms */
|
| 75 |
#define FTDI_CTS (1<<4) // CTS line status |
| 76 |
#define FTDI_DSR (1<<5) // DSR line status |
| 77 |
#define FTDI_RI (1<<6) // RI line status |
| 78 |
#define FTDI_RLSD (1<<7) // Receive Line Signal Detect |
| 79 |
|
| 80 |
/* Status */
|
| 81 |
|
| 82 |
#define FTDI_DR (1<<0) // Data Ready |
| 83 |
#define FTDI_OE (1<<1) // Overrun Err |
| 84 |
#define FTDI_PE (1<<2) // Parity Err |
| 85 |
#define FTDI_FE (1<<3) // Framing Err |
| 86 |
#define FTDI_BI (1<<4) // Break Interrupt |
| 87 |
#define FTDI_THRE (1<<5) // Transmitter Holding Register |
| 88 |
#define FTDI_TEMT (1<<6) // Transmitter Empty |
| 89 |
#define FTDI_FIFO (1<<7) // Error in FIFO |
| 90 |
|
| 91 |
typedef struct { |
| 92 |
USBDevice dev; |
| 93 |
uint32_t vendorid; |
| 94 |
uint32_t productid; |
| 95 |
uint8_t recv_buf[RECV_BUF]; |
| 96 |
uint16_t recv_ptr; |
| 97 |
uint16_t recv_used; |
| 98 |
uint8_t event_chr; |
| 99 |
uint8_t error_chr; |
| 100 |
uint8_t event_trigger; |
| 101 |
QEMUSerialSetParams params; |
| 102 |
int latency; /* ms */ |
| 103 |
CharDriverState *cs; |
| 104 |
} USBSerialState; |
| 105 |
|
| 106 |
static const uint8_t qemu_serial_dev_descriptor[] = { |
| 107 |
0x12, /* u8 bLength; */ |
| 108 |
0x01, /* u8 bDescriptorType; Device */ |
| 109 |
0x00, 0x02, /* u16 bcdUSB; v2.0 */ |
| 110 |
|
| 111 |
0x00, /* u8 bDeviceClass; */ |
| 112 |
0x00, /* u8 bDeviceSubClass; */ |
| 113 |
0x00, /* u8 bDeviceProtocol; [ low/full speeds only ] */ |
| 114 |
0x08, /* u8 bMaxPacketSize0; 8 Bytes */ |
| 115 |
|
| 116 |
/* Vendor and product id are arbitrary. */
|
| 117 |
0x03, 0x04, /* u16 idVendor; */ |
| 118 |
0x00, 0xFF, /* u16 idProduct; */ |
| 119 |
0x00, 0x04, /* u16 bcdDevice */ |
| 120 |
|
| 121 |
0x01, /* u8 iManufacturer; */ |
| 122 |
0x02, /* u8 iProduct; */ |
| 123 |
0x03, /* u8 iSerialNumber; */ |
| 124 |
0x01 /* u8 bNumConfigurations; */ |
| 125 |
}; |
| 126 |
|
| 127 |
static const uint8_t qemu_serial_config_descriptor[] = { |
| 128 |
|
| 129 |
/* one configuration */
|
| 130 |
0x09, /* u8 bLength; */ |
| 131 |
0x02, /* u8 bDescriptorType; Configuration */ |
| 132 |
0x20, 0x00, /* u16 wTotalLength; */ |
| 133 |
0x01, /* u8 bNumInterfaces; (1) */ |
| 134 |
0x01, /* u8 bConfigurationValue; */ |
| 135 |
0x00, /* u8 iConfiguration; */ |
| 136 |
0x80, /* u8 bmAttributes; |
| 137 |
Bit 7: must be set,
|
| 138 |
6: Self-powered,
|
| 139 |
5: Remote wakeup,
|
| 140 |
4..0: resvd */
|
| 141 |
100/2, /* u8 MaxPower; */ |
| 142 |
|
| 143 |
/* one interface */
|
| 144 |
0x09, /* u8 if_bLength; */ |
| 145 |
0x04, /* u8 if_bDescriptorType; Interface */ |
| 146 |
0x00, /* u8 if_bInterfaceNumber; */ |
| 147 |
0x00, /* u8 if_bAlternateSetting; */ |
| 148 |
0x02, /* u8 if_bNumEndpoints; */ |
| 149 |
0xff, /* u8 if_bInterfaceClass; Vendor Specific */ |
| 150 |
0xff, /* u8 if_bInterfaceSubClass; Vendor Specific */ |
| 151 |
0xff, /* u8 if_bInterfaceProtocol; Vendor Specific */ |
| 152 |
0x02, /* u8 if_iInterface; */ |
| 153 |
|
| 154 |
/* Bulk-In endpoint */
|
| 155 |
0x07, /* u8 ep_bLength; */ |
| 156 |
0x05, /* u8 ep_bDescriptorType; Endpoint */ |
| 157 |
0x81, /* u8 ep_bEndpointAddress; IN Endpoint 1 */ |
| 158 |
0x02, /* u8 ep_bmAttributes; Bulk */ |
| 159 |
0x40, 0x00, /* u16 ep_wMaxPacketSize; */ |
| 160 |
0x00, /* u8 ep_bInterval; */ |
| 161 |
|
| 162 |
/* Bulk-Out endpoint */
|
| 163 |
0x07, /* u8 ep_bLength; */ |
| 164 |
0x05, /* u8 ep_bDescriptorType; Endpoint */ |
| 165 |
0x02, /* u8 ep_bEndpointAddress; OUT Endpoint 2 */ |
| 166 |
0x02, /* u8 ep_bmAttributes; Bulk */ |
| 167 |
0x40, 0x00, /* u16 ep_wMaxPacketSize; */ |
| 168 |
0x00 /* u8 ep_bInterval; */ |
| 169 |
}; |
| 170 |
|
| 171 |
static void usb_serial_reset(USBSerialState *s) |
| 172 |
{
|
| 173 |
/* TODO: Set flow control to none */
|
| 174 |
s->event_chr = 0x0d;
|
| 175 |
s->event_trigger = 0;
|
| 176 |
s->recv_ptr = 0;
|
| 177 |
s->recv_used = 0;
|
| 178 |
/* TODO: purge in char driver */
|
| 179 |
} |
| 180 |
|
| 181 |
static void usb_serial_handle_reset(USBDevice *dev) |
| 182 |
{
|
| 183 |
USBSerialState *s = (USBSerialState *)dev; |
| 184 |
|
| 185 |
DPRINTF("Reset\n");
|
| 186 |
|
| 187 |
usb_serial_reset(s); |
| 188 |
/* TODO: Reset char device, send BREAK? */
|
| 189 |
} |
| 190 |
|
| 191 |
static uint8_t usb_get_modem_lines(USBSerialState *s)
|
| 192 |
{
|
| 193 |
int flags;
|
| 194 |
uint8_t ret; |
| 195 |
|
| 196 |
if (qemu_chr_ioctl(s->cs, CHR_IOCTL_SERIAL_GET_TIOCM, &flags) == -ENOTSUP)
|
| 197 |
return FTDI_CTS|FTDI_DSR|FTDI_RLSD;
|
| 198 |
|
| 199 |
ret = 0;
|
| 200 |
if (flags & CHR_TIOCM_CTS)
|
| 201 |
ret |= FTDI_CTS; |
| 202 |
if (flags & CHR_TIOCM_DSR)
|
| 203 |
ret |= FTDI_DSR; |
| 204 |
if (flags & CHR_TIOCM_RI)
|
| 205 |
ret |= FTDI_RI; |
| 206 |
if (flags & CHR_TIOCM_CAR)
|
| 207 |
ret |= FTDI_RLSD; |
| 208 |
|
| 209 |
return ret;
|
| 210 |
} |
| 211 |
|
| 212 |
static int usb_serial_handle_control(USBDevice *dev, int request, int value, |
| 213 |
int index, int length, uint8_t *data) |
| 214 |
{
|
| 215 |
USBSerialState *s = (USBSerialState *)dev; |
| 216 |
int ret = 0; |
| 217 |
|
| 218 |
//DPRINTF("got control %x, value %x\n",request, value);
|
| 219 |
switch (request) {
|
| 220 |
case DeviceRequest | USB_REQ_GET_STATUS:
|
| 221 |
data[0] = (0 << USB_DEVICE_SELF_POWERED) | |
| 222 |
(dev->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP); |
| 223 |
data[1] = 0x00; |
| 224 |
ret = 2;
|
| 225 |
break;
|
| 226 |
case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
|
| 227 |
if (value == USB_DEVICE_REMOTE_WAKEUP) {
|
| 228 |
dev->remote_wakeup = 0;
|
| 229 |
} else {
|
| 230 |
goto fail;
|
| 231 |
} |
| 232 |
ret = 0;
|
| 233 |
break;
|
| 234 |
case DeviceOutRequest | USB_REQ_SET_FEATURE:
|
| 235 |
if (value == USB_DEVICE_REMOTE_WAKEUP) {
|
| 236 |
dev->remote_wakeup = 1;
|
| 237 |
} else {
|
| 238 |
goto fail;
|
| 239 |
} |
| 240 |
ret = 0;
|
| 241 |
break;
|
| 242 |
case DeviceOutRequest | USB_REQ_SET_ADDRESS:
|
| 243 |
dev->addr = value; |
| 244 |
ret = 0;
|
| 245 |
break;
|
| 246 |
case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
|
| 247 |
switch(value >> 8) { |
| 248 |
case USB_DT_DEVICE:
|
| 249 |
memcpy(data, qemu_serial_dev_descriptor, |
| 250 |
sizeof(qemu_serial_dev_descriptor));
|
| 251 |
data[8] = s->vendorid & 0xff; |
| 252 |
data[9] = ((s->vendorid) >> 8) & 0xff; |
| 253 |
data[10] = s->productid & 0xff; |
| 254 |
data[11] = ((s->productid) >> 8) & 0xff; |
| 255 |
ret = sizeof(qemu_serial_dev_descriptor);
|
| 256 |
break;
|
| 257 |
case USB_DT_CONFIG:
|
| 258 |
memcpy(data, qemu_serial_config_descriptor, |
| 259 |
sizeof(qemu_serial_config_descriptor));
|
| 260 |
ret = sizeof(qemu_serial_config_descriptor);
|
| 261 |
break;
|
| 262 |
case USB_DT_STRING:
|
| 263 |
switch(value & 0xff) { |
| 264 |
case 0: |
| 265 |
/* language ids */
|
| 266 |
data[0] = 4; |
| 267 |
data[1] = 3; |
| 268 |
data[2] = 0x09; |
| 269 |
data[3] = 0x04; |
| 270 |
ret = 4;
|
| 271 |
break;
|
| 272 |
case 1: |
| 273 |
/* vendor description */
|
| 274 |
ret = set_usb_string(data, "QEMU " QEMU_VERSION);
|
| 275 |
break;
|
| 276 |
case 2: |
| 277 |
/* product description */
|
| 278 |
ret = set_usb_string(data, "QEMU USB SERIAL");
|
| 279 |
break;
|
| 280 |
case 3: |
| 281 |
/* serial number */
|
| 282 |
ret = set_usb_string(data, "1");
|
| 283 |
break;
|
| 284 |
default:
|
| 285 |
goto fail;
|
| 286 |
} |
| 287 |
break;
|
| 288 |
default:
|
| 289 |
goto fail;
|
| 290 |
} |
| 291 |
break;
|
| 292 |
case DeviceRequest | USB_REQ_GET_CONFIGURATION:
|
| 293 |
data[0] = 1; |
| 294 |
ret = 1;
|
| 295 |
break;
|
| 296 |
case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
|
| 297 |
ret = 0;
|
| 298 |
break;
|
| 299 |
case DeviceRequest | USB_REQ_GET_INTERFACE:
|
| 300 |
data[0] = 0; |
| 301 |
ret = 1;
|
| 302 |
break;
|
| 303 |
case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
|
| 304 |
ret = 0;
|
| 305 |
break;
|
| 306 |
case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
|
| 307 |
ret = 0;
|
| 308 |
break;
|
| 309 |
|
| 310 |
/* Class specific requests. */
|
| 311 |
case DeviceOutVendor | FTDI_RESET:
|
| 312 |
switch (value) {
|
| 313 |
case FTDI_RESET_SIO:
|
| 314 |
usb_serial_reset(s); |
| 315 |
break;
|
| 316 |
case FTDI_RESET_RX:
|
| 317 |
s->recv_ptr = 0;
|
| 318 |
s->recv_used = 0;
|
| 319 |
/* TODO: purge from char device */
|
| 320 |
break;
|
| 321 |
case FTDI_RESET_TX:
|
| 322 |
/* TODO: purge from char device */
|
| 323 |
break;
|
| 324 |
} |
| 325 |
break;
|
| 326 |
case DeviceOutVendor | FTDI_SET_MDM_CTRL:
|
| 327 |
{
|
| 328 |
static int flags; |
| 329 |
qemu_chr_ioctl(s->cs,CHR_IOCTL_SERIAL_GET_TIOCM, &flags); |
| 330 |
if (value & FTDI_SET_RTS) {
|
| 331 |
if (value & FTDI_RTS)
|
| 332 |
flags |= CHR_TIOCM_RTS; |
| 333 |
else
|
| 334 |
flags &= ~CHR_TIOCM_RTS; |
| 335 |
} |
| 336 |
if (value & FTDI_SET_DTR) {
|
| 337 |
if (value & FTDI_DTR)
|
| 338 |
flags |= CHR_TIOCM_DTR; |
| 339 |
else
|
| 340 |
flags &= ~CHR_TIOCM_DTR; |
| 341 |
} |
| 342 |
qemu_chr_ioctl(s->cs,CHR_IOCTL_SERIAL_SET_TIOCM, &flags); |
| 343 |
break;
|
| 344 |
} |
| 345 |
case DeviceOutVendor | FTDI_SET_FLOW_CTRL:
|
| 346 |
/* TODO: ioctl */
|
| 347 |
break;
|
| 348 |
case DeviceOutVendor | FTDI_SET_BAUD: {
|
| 349 |
static const int subdivisors8[8] = { 0, 4, 2, 1, 3, 5, 6, 7 }; |
| 350 |
int subdivisor8 = subdivisors8[((value & 0xc000) >> 14) |
| 351 |
| ((index & 1) << 2)]; |
| 352 |
int divisor = value & 0x3fff; |
| 353 |
|
| 354 |
/* chip special cases */
|
| 355 |
if (divisor == 1 && subdivisor8 == 0) |
| 356 |
subdivisor8 = 4;
|
| 357 |
if (divisor == 0 && subdivisor8 == 0) |
| 358 |
divisor = 1;
|
| 359 |
|
| 360 |
s->params.speed = (48000000 / 2) / (8 * divisor + subdivisor8); |
| 361 |
qemu_chr_ioctl(s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params); |
| 362 |
break;
|
| 363 |
} |
| 364 |
case DeviceOutVendor | FTDI_SET_DATA:
|
| 365 |
switch (value & FTDI_PARITY) {
|
| 366 |
case 0: |
| 367 |
s->params.parity = 'N';
|
| 368 |
break;
|
| 369 |
case FTDI_ODD:
|
| 370 |
s->params.parity = 'O';
|
| 371 |
break;
|
| 372 |
case FTDI_EVEN:
|
| 373 |
s->params.parity = 'E';
|
| 374 |
break;
|
| 375 |
default:
|
| 376 |
DPRINTF("unsupported parity %d\n", value & FTDI_PARITY);
|
| 377 |
goto fail;
|
| 378 |
} |
| 379 |
switch (value & FTDI_STOP) {
|
| 380 |
case FTDI_STOP1:
|
| 381 |
s->params.stop_bits = 1;
|
| 382 |
break;
|
| 383 |
case FTDI_STOP2:
|
| 384 |
s->params.stop_bits = 2;
|
| 385 |
break;
|
| 386 |
default:
|
| 387 |
DPRINTF("unsupported stop bits %d\n", value & FTDI_STOP);
|
| 388 |
goto fail;
|
| 389 |
} |
| 390 |
qemu_chr_ioctl(s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params); |
| 391 |
/* TODO: TX ON/OFF */
|
| 392 |
break;
|
| 393 |
case DeviceInVendor | FTDI_GET_MDM_ST:
|
| 394 |
data[0] = usb_get_modem_lines(s) | 1; |
| 395 |
data[1] = 0; |
| 396 |
ret = 2;
|
| 397 |
break;
|
| 398 |
case DeviceOutVendor | FTDI_SET_EVENT_CHR:
|
| 399 |
/* TODO: handle it */
|
| 400 |
s->event_chr = value; |
| 401 |
break;
|
| 402 |
case DeviceOutVendor | FTDI_SET_ERROR_CHR:
|
| 403 |
/* TODO: handle it */
|
| 404 |
s->error_chr = value; |
| 405 |
break;
|
| 406 |
case DeviceOutVendor | FTDI_SET_LATENCY:
|
| 407 |
s->latency = value; |
| 408 |
break;
|
| 409 |
case DeviceInVendor | FTDI_GET_LATENCY:
|
| 410 |
data[0] = s->latency;
|
| 411 |
ret = 1;
|
| 412 |
break;
|
| 413 |
default:
|
| 414 |
fail:
|
| 415 |
DPRINTF("got unsupported/bogus control %x, value %x\n", request, value);
|
| 416 |
ret = USB_RET_STALL; |
| 417 |
break;
|
| 418 |
} |
| 419 |
return ret;
|
| 420 |
} |
| 421 |
|
| 422 |
static int usb_serial_handle_data(USBDevice *dev, USBPacket *p) |
| 423 |
{
|
| 424 |
USBSerialState *s = (USBSerialState *)dev; |
| 425 |
int ret = 0; |
| 426 |
uint8_t devep = p->devep; |
| 427 |
uint8_t *data = p->data; |
| 428 |
int len = p->len;
|
| 429 |
int first_len;
|
| 430 |
|
| 431 |
switch (p->pid) {
|
| 432 |
case USB_TOKEN_OUT:
|
| 433 |
if (devep != 2) |
| 434 |
goto fail;
|
| 435 |
qemu_chr_write(s->cs, data, len); |
| 436 |
break;
|
| 437 |
|
| 438 |
case USB_TOKEN_IN:
|
| 439 |
if (devep != 1) |
| 440 |
goto fail;
|
| 441 |
first_len = RECV_BUF - s->recv_ptr; |
| 442 |
if (len <= 2) { |
| 443 |
ret = USB_RET_NAK; |
| 444 |
break;
|
| 445 |
} |
| 446 |
*data++ = usb_get_modem_lines(s) | 1;
|
| 447 |
/* We do not have the uart details */
|
| 448 |
/* handle serial break */
|
| 449 |
if (s->event_trigger && s->event_trigger & FTDI_BI) {
|
| 450 |
s->event_trigger &= ~FTDI_BI; |
| 451 |
*data++ = FTDI_BI; |
| 452 |
ret = 2;
|
| 453 |
break;
|
| 454 |
} else {
|
| 455 |
*data++ = 0;
|
| 456 |
} |
| 457 |
len -= 2;
|
| 458 |
if (len > s->recv_used)
|
| 459 |
len = s->recv_used; |
| 460 |
if (!len) {
|
| 461 |
ret = USB_RET_NAK; |
| 462 |
break;
|
| 463 |
} |
| 464 |
if (first_len > len)
|
| 465 |
first_len = len; |
| 466 |
memcpy(data, s->recv_buf + s->recv_ptr, first_len); |
| 467 |
if (len > first_len)
|
| 468 |
memcpy(data + first_len, s->recv_buf, len - first_len); |
| 469 |
s->recv_used -= len; |
| 470 |
s->recv_ptr = (s->recv_ptr + len) % RECV_BUF; |
| 471 |
ret = len + 2;
|
| 472 |
break;
|
| 473 |
|
| 474 |
default:
|
| 475 |
DPRINTF("Bad token\n");
|
| 476 |
fail:
|
| 477 |
ret = USB_RET_STALL; |
| 478 |
break;
|
| 479 |
} |
| 480 |
|
| 481 |
return ret;
|
| 482 |
} |
| 483 |
|
| 484 |
static void usb_serial_handle_destroy(USBDevice *dev) |
| 485 |
{
|
| 486 |
USBSerialState *s = (USBSerialState *)dev; |
| 487 |
|
| 488 |
qemu_chr_close(s->cs); |
| 489 |
} |
| 490 |
|
| 491 |
static int usb_serial_can_read(void *opaque) |
| 492 |
{
|
| 493 |
USBSerialState *s = opaque; |
| 494 |
return RECV_BUF - s->recv_used;
|
| 495 |
} |
| 496 |
|
| 497 |
static void usb_serial_read(void *opaque, const uint8_t *buf, int size) |
| 498 |
{
|
| 499 |
USBSerialState *s = opaque; |
| 500 |
int first_size, start;
|
| 501 |
|
| 502 |
/* room in the buffer? */
|
| 503 |
if (size > (RECV_BUF - s->recv_used))
|
| 504 |
size = RECV_BUF - s->recv_used; |
| 505 |
|
| 506 |
start = s->recv_ptr + s->recv_used; |
| 507 |
if (start < RECV_BUF) {
|
| 508 |
/* copy data to end of buffer */
|
| 509 |
first_size = RECV_BUF - start; |
| 510 |
if (first_size > size)
|
| 511 |
first_size = size; |
| 512 |
|
| 513 |
memcpy(s->recv_buf + start, buf, first_size); |
| 514 |
|
| 515 |
/* wrap around to front if needed */
|
| 516 |
if (size > first_size)
|
| 517 |
memcpy(s->recv_buf, buf + first_size, size - first_size); |
| 518 |
} else {
|
| 519 |
start -= RECV_BUF; |
| 520 |
memcpy(s->recv_buf + start, buf, size); |
| 521 |
} |
| 522 |
s->recv_used += size; |
| 523 |
} |
| 524 |
|
| 525 |
static void usb_serial_event(void *opaque, int event) |
| 526 |
{
|
| 527 |
USBSerialState *s = opaque; |
| 528 |
|
| 529 |
switch (event) {
|
| 530 |
case CHR_EVENT_BREAK:
|
| 531 |
s->event_trigger |= FTDI_BI; |
| 532 |
break;
|
| 533 |
case CHR_EVENT_FOCUS:
|
| 534 |
break;
|
| 535 |
case CHR_EVENT_OPENED:
|
| 536 |
usb_serial_reset(s); |
| 537 |
/* TODO: Reset USB port */
|
| 538 |
break;
|
| 539 |
} |
| 540 |
} |
| 541 |
|
| 542 |
static int usb_serial_initfn(USBDevice *dev) |
| 543 |
{
|
| 544 |
USBSerialState *s = DO_UPCAST(USBSerialState, dev, dev); |
| 545 |
s->dev.speed = USB_SPEED_FULL; |
| 546 |
|
| 547 |
qemu_chr_add_handlers(s->cs, usb_serial_can_read, usb_serial_read, |
| 548 |
usb_serial_event, s); |
| 549 |
usb_serial_handle_reset(dev); |
| 550 |
return 0; |
| 551 |
} |
| 552 |
|
| 553 |
static USBDevice *usb_serial_init(const char *filename) |
| 554 |
{
|
| 555 |
USBDevice *dev; |
| 556 |
CharDriverState *cdrv; |
| 557 |
uint32_t vendorid = 0, productid = 0; |
| 558 |
char label[32]; |
| 559 |
static int index; |
| 560 |
|
| 561 |
while (*filename && *filename != ':') { |
| 562 |
const char *p; |
| 563 |
char *e;
|
| 564 |
if (strstart(filename, "vendorid=", &p)) { |
| 565 |
vendorid = strtol(p, &e, 16);
|
| 566 |
if (e == p || (*e && *e != ',' && *e != ':')) { |
| 567 |
qemu_error("bogus vendor ID %s\n", p);
|
| 568 |
return NULL; |
| 569 |
} |
| 570 |
filename = e; |
| 571 |
} else if (strstart(filename, "productid=", &p)) { |
| 572 |
productid = strtol(p, &e, 16);
|
| 573 |
if (e == p || (*e && *e != ',' && *e != ':')) { |
| 574 |
qemu_error("bogus product ID %s\n", p);
|
| 575 |
return NULL; |
| 576 |
} |
| 577 |
filename = e; |
| 578 |
} else {
|
| 579 |
qemu_error("unrecognized serial USB option %s\n", filename);
|
| 580 |
return NULL; |
| 581 |
} |
| 582 |
while(*filename == ',') |
| 583 |
filename++; |
| 584 |
} |
| 585 |
if (!*filename) {
|
| 586 |
qemu_error("character device specification needed\n");
|
| 587 |
return NULL; |
| 588 |
} |
| 589 |
filename++; |
| 590 |
|
| 591 |
snprintf(label, sizeof(label), "usbserial%d", index++); |
| 592 |
cdrv = qemu_chr_open(label, filename, NULL);
|
| 593 |
if (!cdrv)
|
| 594 |
return NULL; |
| 595 |
|
| 596 |
dev = usb_create(NULL /* FIXME */, "usb-serial"); |
| 597 |
if (!dev) {
|
| 598 |
return NULL; |
| 599 |
} |
| 600 |
qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);
|
| 601 |
if (vendorid)
|
| 602 |
qdev_prop_set_uint16(&dev->qdev, "vendorid", vendorid);
|
| 603 |
if (productid)
|
| 604 |
qdev_prop_set_uint16(&dev->qdev, "productid", productid);
|
| 605 |
qdev_init_nofail(&dev->qdev); |
| 606 |
|
| 607 |
return dev;
|
| 608 |
} |
| 609 |
|
| 610 |
static USBDevice *usb_braille_init(const char *unused) |
| 611 |
{
|
| 612 |
USBDevice *dev; |
| 613 |
CharDriverState *cdrv; |
| 614 |
|
| 615 |
cdrv = qemu_chr_open("braille", "braille", NULL); |
| 616 |
if (!cdrv)
|
| 617 |
return NULL; |
| 618 |
|
| 619 |
dev = usb_create(NULL /* FIXME */, "usb-braille"); |
| 620 |
qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);
|
| 621 |
qdev_init_nofail(&dev->qdev); |
| 622 |
|
| 623 |
return dev;
|
| 624 |
} |
| 625 |
|
| 626 |
static struct USBDeviceInfo serial_info = { |
| 627 |
.product_desc = "QEMU USB Serial",
|
| 628 |
.qdev.name = "usb-serial",
|
| 629 |
.qdev.size = sizeof(USBSerialState),
|
| 630 |
.init = usb_serial_initfn, |
| 631 |
.handle_packet = usb_generic_handle_packet, |
| 632 |
.handle_reset = usb_serial_handle_reset, |
| 633 |
.handle_control = usb_serial_handle_control, |
| 634 |
.handle_data = usb_serial_handle_data, |
| 635 |
.handle_destroy = usb_serial_handle_destroy, |
| 636 |
.usbdevice_name = "serial",
|
| 637 |
.usbdevice_init = usb_serial_init, |
| 638 |
.qdev.props = (Property[]) {
|
| 639 |
DEFINE_PROP_CHR("chardev", USBSerialState, cs),
|
| 640 |
DEFINE_PROP_HEX32("vendorid", USBSerialState, vendorid, 0x0403), |
| 641 |
DEFINE_PROP_HEX32("productid", USBSerialState, productid, 0x6001), |
| 642 |
DEFINE_PROP_END_OF_LIST(), |
| 643 |
}, |
| 644 |
}; |
| 645 |
|
| 646 |
static struct USBDeviceInfo braille_info = { |
| 647 |
.product_desc = "QEMU USB Braille",
|
| 648 |
.qdev.name = "usb-braille",
|
| 649 |
.qdev.size = sizeof(USBSerialState),
|
| 650 |
.init = usb_serial_initfn, |
| 651 |
.handle_packet = usb_generic_handle_packet, |
| 652 |
.handle_reset = usb_serial_handle_reset, |
| 653 |
.handle_control = usb_serial_handle_control, |
| 654 |
.handle_data = usb_serial_handle_data, |
| 655 |
.handle_destroy = usb_serial_handle_destroy, |
| 656 |
.usbdevice_name = "braille",
|
| 657 |
.usbdevice_init = usb_braille_init, |
| 658 |
.qdev.props = (Property[]) {
|
| 659 |
DEFINE_PROP_CHR("chardev", USBSerialState, cs),
|
| 660 |
DEFINE_PROP_HEX32("vendorid", USBSerialState, vendorid, 0x0403), |
| 661 |
DEFINE_PROP_HEX32("productid", USBSerialState, productid, 0xfe72), |
| 662 |
DEFINE_PROP_END_OF_LIST(), |
| 663 |
}, |
| 664 |
}; |
| 665 |
|
| 666 |
static void usb_serial_register_devices(void) |
| 667 |
{
|
| 668 |
usb_qdev_register(&serial_info); |
| 669 |
usb_qdev_register(&braille_info); |
| 670 |
} |
| 671 |
device_init(usb_serial_register_devices) |