| 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 licensed under the LGPL. |
| 9 | */ |
| 10 | |
| 11 | #include "qemu/osdep.h" |
| 12 | #include "qapi/error.h" |
| 13 | #include "qemu/cutils.h" |
| 14 | #include "qemu/error-report.h" |
| 15 | #include "qemu/module.h" |
| 16 | #include "hw/core/qdev-properties.h" |
| 17 | #include "hw/core/qdev-properties-system.h" |
| 18 | #include "hw/usb/usb.h" |
| 19 | #include "migration/vmstate.h" |
| 20 | #include "desc.h" |
| 21 | #include "chardev/char-serial.h" |
| 22 | #include "chardev/char-fe.h" |
| 23 | #include "qom/object.h" |
| 24 | #include "trace.h" |
| 25 | |
| 26 | |
| 27 | #define RECV_BUF (512 - (2 * 8)) |
| 28 | |
| 29 | /* Commands */ |
| 30 | #define FTDI_RESET 0 |
| 31 | #define FTDI_SET_MDM_CTRL 1 |
| 32 | #define FTDI_SET_FLOW_CTRL 2 |
| 33 | #define FTDI_SET_BAUD 3 |
| 34 | #define FTDI_SET_DATA 4 |
| 35 | #define FTDI_GET_MDM_ST 5 |
| 36 | #define FTDI_SET_EVENT_CHR 6 |
| 37 | #define FTDI_SET_ERROR_CHR 7 |
| 38 | #define FTDI_SET_LATENCY 9 |
| 39 | #define FTDI_GET_LATENCY 10 |
| 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_NO_HS 0 |
| 57 | #define FTDI_RTS_CTS_HS 1 |
| 58 | #define FTDI_DTR_DSR_HS 2 |
| 59 | #define FTDI_XON_XOFF_HS 4 |
| 60 | |
| 61 | /* SET_DATA */ |
| 62 | |
| 63 | #define FTDI_PARITY (0x7 << 8) |
| 64 | #define FTDI_ODD (0x1 << 8) |
| 65 | #define FTDI_EVEN (0x2 << 8) |
| 66 | #define FTDI_MARK (0x3 << 8) |
| 67 | #define FTDI_SPACE (0x4 << 8) |
| 68 | |
| 69 | #define FTDI_STOP (0x3 << 11) |
| 70 | #define FTDI_STOP1 (0x0 << 11) |
| 71 | #define FTDI_STOP15 (0x1 << 11) |
| 72 | #define FTDI_STOP2 (0x2 << 11) |
| 73 | |
| 74 | /* GET_MDM_ST */ |
| 75 | /* TODO: should be sent every 40ms */ |
| 76 | #define FTDI_CTS (1 << 4) /* CTS line status */ |
| 77 | #define FTDI_DSR (1 << 5) /* DSR line status */ |
| 78 | #define FTDI_RI (1 << 6) /* RI line status */ |
| 79 | #define FTDI_RLSD (1 << 7) /* Receive Line Signal Detect */ |
| 80 | |
| 81 | /* Status */ |
| 82 | |
| 83 | #define FTDI_DR (1 << 0) /* Data Ready */ |
| 84 | #define FTDI_OE (1 << 1) /* Overrun Err */ |
| 85 | #define FTDI_PE (1 << 2) /* Parity Err */ |
| 86 | #define FTDI_FE (1 << 3) /* Framing Err */ |
| 87 | #define FTDI_BI (1 << 4) /* Break Interrupt */ |
| 88 | #define FTDI_THRE (1 << 5) /* Transmitter Holding Register */ |
| 89 | #define FTDI_TEMT (1 << 6) /* Transmitter Empty */ |
| 90 | #define FTDI_FIFO (1 << 7) /* Error in FIFO */ |
| 91 | |
| 92 | struct USBSerialState { |
| 93 | USBDevice dev; |
| 94 | |
| 95 | USBEndpoint *intr; |
| 96 | uint8_t recv_buf[RECV_BUF]; |
| 97 | uint16_t recv_ptr; |
| 98 | uint16_t recv_used; |
| 99 | uint8_t event_chr; |
| 100 | uint8_t error_chr; |
| 101 | uint8_t event_trigger; |
| 102 | bool always_plugged; |
| 103 | uint8_t flow_control; |
| 104 | uint8_t xon; |
| 105 | uint8_t xoff; |
| 106 | QEMUSerialSetParams params; |
| 107 | int latency; /* ms */ |
| 108 | CharFrontend cs; |
| 109 | }; |
| 110 | |
| 111 | #define TYPE_USB_SERIAL "usb-serial-dev" |
| 112 | OBJECT_DECLARE_SIMPLE_TYPE(USBSerialState, USB_SERIAL) |
| 113 | |
| 114 | enum { |
| 115 | STR_MANUFACTURER = 1, |
| 116 | STR_PRODUCT_SERIAL, |
| 117 | STR_PRODUCT_BRAILLE, |
| 118 | STR_SERIALNUMBER, |
| 119 | }; |
| 120 | |
| 121 | static const USBDescStrings desc_strings = { |
| 122 | [STR_MANUFACTURER] = "QEMU", |
| 123 | [STR_PRODUCT_SERIAL] = "QEMU USB SERIAL", |
| 124 | [STR_PRODUCT_BRAILLE] = "QEMU USB BAUM BRAILLE", |
| 125 | [STR_SERIALNUMBER] = "1", |
| 126 | }; |
| 127 | |
| 128 | static const USBDescIface desc_iface0 = { |
| 129 | .bInterfaceNumber = 0, |
| 130 | .bNumEndpoints = 2, |
| 131 | .bInterfaceClass = 0xff, |
| 132 | .bInterfaceSubClass = 0xff, |
| 133 | .bInterfaceProtocol = 0xff, |
| 134 | .eps = (USBDescEndpoint[]) { |
| 135 | { |
| 136 | .bEndpointAddress = USB_DIR_IN | 0x01, |
| 137 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 138 | .wMaxPacketSize = 64, |
| 139 | },{ |
| 140 | .bEndpointAddress = USB_DIR_OUT | 0x02, |
| 141 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 142 | .wMaxPacketSize = 64, |
| 143 | }, |
| 144 | } |
| 145 | }; |
| 146 | |
| 147 | static const USBDescDevice desc_device = { |
| 148 | .bcdUSB = 0x0200, |
| 149 | .bMaxPacketSize0 = 8, |
| 150 | .bNumConfigurations = 1, |
| 151 | .confs = (USBDescConfig[]) { |
| 152 | { |
| 153 | .bNumInterfaces = 1, |
| 154 | .bConfigurationValue = 1, |
| 155 | .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, |
| 156 | .bMaxPower = 50, |
| 157 | .nif = 1, |
| 158 | .ifs = &desc_iface0, |
| 159 | }, |
| 160 | }, |
| 161 | }; |
| 162 | |
| 163 | static const USBDesc desc_serial = { |
| 164 | .id = { |
| 165 | .idVendor = 0x0403, |
| 166 | .idProduct = 0x6001, |
| 167 | .bcdDevice = 0x0400, |
| 168 | .iManufacturer = STR_MANUFACTURER, |
| 169 | .iProduct = STR_PRODUCT_SERIAL, |
| 170 | .iSerialNumber = STR_SERIALNUMBER, |
| 171 | }, |
| 172 | .full = &desc_device, |
| 173 | .str = desc_strings, |
| 174 | }; |
| 175 | |
| 176 | static const USBDesc desc_braille = { |
| 177 | .id = { |
| 178 | .idVendor = 0x0403, |
| 179 | .idProduct = 0xfe72, |
| 180 | .bcdDevice = 0x0400, |
| 181 | .iManufacturer = STR_MANUFACTURER, |
| 182 | .iProduct = STR_PRODUCT_BRAILLE, |
| 183 | .iSerialNumber = STR_SERIALNUMBER, |
| 184 | }, |
| 185 | .full = &desc_device, |
| 186 | .str = desc_strings, |
| 187 | }; |
| 188 | |
| 189 | static void usb_serial_set_flow_control(USBSerialState *s, |
| 190 | uint8_t flow_control) |
| 191 | { |
| 192 | USBDevice *dev = USB_DEVICE(s); |
| 193 | USBBus *bus = usb_bus_from_device(dev); |
| 194 | |
| 195 | /* TODO: ioctl */ |
| 196 | s->flow_control = flow_control; |
| 197 | trace_usb_serial_set_flow_control(bus->busnr, dev->addr, flow_control); |
| 198 | } |
| 199 | |
| 200 | static void usb_serial_set_xonxoff(USBSerialState *s, int xonxoff) |
| 201 | { |
| 202 | USBDevice *dev = USB_DEVICE(s); |
| 203 | USBBus *bus = usb_bus_from_device(dev); |
| 204 | |
| 205 | s->xon = xonxoff & 0xff; |
| 206 | s->xoff = (xonxoff >> 8) & 0xff; |
| 207 | |
| 208 | trace_usb_serial_set_xonxoff(bus->busnr, dev->addr, s->xon, s->xoff); |
| 209 | } |
| 210 | |
| 211 | static void usb_serial_reset(USBSerialState *s) |
| 212 | { |
| 213 | s->event_chr = 0x0d; |
| 214 | s->event_trigger = 0; |
| 215 | s->recv_ptr = 0; |
| 216 | s->recv_used = 0; |
| 217 | /* TODO: purge in char driver */ |
| 218 | usb_serial_set_flow_control(s, FTDI_NO_HS); |
| 219 | } |
| 220 | |
| 221 | static void usb_serial_handle_reset(USBDevice *dev) |
| 222 | { |
| 223 | USBSerialState *s = USB_SERIAL(dev); |
| 224 | USBBus *bus = usb_bus_from_device(dev); |
| 225 | |
| 226 | trace_usb_serial_reset(bus->busnr, dev->addr); |
| 227 | |
| 228 | usb_serial_reset(s); |
| 229 | /* TODO: Reset char device, send BREAK? */ |
| 230 | } |
| 231 | |
| 232 | static uint8_t usb_get_modem_lines(USBSerialState *s) |
| 233 | { |
| 234 | int flags; |
| 235 | uint8_t ret; |
| 236 | |
| 237 | if (qemu_chr_fe_ioctl(&s->cs, |
| 238 | CHR_IOCTL_SERIAL_GET_TIOCM, &flags) == -ENOTSUP) { |
| 239 | return FTDI_CTS | FTDI_DSR | FTDI_RLSD; |
| 240 | } |
| 241 | |
| 242 | ret = 0; |
| 243 | if (flags & CHR_TIOCM_CTS) { |
| 244 | ret |= FTDI_CTS; |
| 245 | } |
| 246 | if (flags & CHR_TIOCM_DSR) { |
| 247 | ret |= FTDI_DSR; |
| 248 | } |
| 249 | if (flags & CHR_TIOCM_RI) { |
| 250 | ret |= FTDI_RI; |
| 251 | } |
| 252 | if (flags & CHR_TIOCM_CAR) { |
| 253 | ret |= FTDI_RLSD; |
| 254 | } |
| 255 | |
| 256 | return ret; |
| 257 | } |
| 258 | |
| 259 | static void usb_serial_handle_control(USBDevice *dev, USBPacket *p, |
| 260 | int request, int value, int index, |
| 261 | int length, uint8_t *data) |
| 262 | { |
| 263 | USBSerialState *s = USB_SERIAL(dev); |
| 264 | USBBus *bus = usb_bus_from_device(dev); |
| 265 | int ret; |
| 266 | |
| 267 | trace_usb_serial_handle_control(bus->busnr, dev->addr, request, value); |
| 268 | |
| 269 | ret = usb_desc_handle_control(dev, p, request, value, index, length, data); |
| 270 | if (ret >= 0) { |
| 271 | return; |
| 272 | } |
| 273 | |
| 274 | switch (request) { |
| 275 | case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: |
| 276 | break; |
| 277 | |
| 278 | /* Class specific requests. */ |
| 279 | case VendorDeviceOutRequest | FTDI_RESET: |
| 280 | switch (value) { |
| 281 | case FTDI_RESET_SIO: |
| 282 | usb_serial_reset(s); |
| 283 | break; |
| 284 | case FTDI_RESET_RX: |
| 285 | s->recv_ptr = 0; |
| 286 | s->recv_used = 0; |
| 287 | /* TODO: purge from char device */ |
| 288 | break; |
| 289 | case FTDI_RESET_TX: |
| 290 | /* TODO: purge from char device */ |
| 291 | break; |
| 292 | } |
| 293 | break; |
| 294 | case VendorDeviceOutRequest | FTDI_SET_MDM_CTRL: |
| 295 | { |
| 296 | static int flags; |
| 297 | qemu_chr_fe_ioctl(&s->cs, CHR_IOCTL_SERIAL_GET_TIOCM, &flags); |
| 298 | if (value & FTDI_SET_RTS) { |
| 299 | if (value & FTDI_RTS) { |
| 300 | flags |= CHR_TIOCM_RTS; |
| 301 | } else { |
| 302 | flags &= ~CHR_TIOCM_RTS; |
| 303 | } |
| 304 | } |
| 305 | if (value & FTDI_SET_DTR) { |
| 306 | if (value & FTDI_DTR) { |
| 307 | flags |= CHR_TIOCM_DTR; |
| 308 | } else { |
| 309 | flags &= ~CHR_TIOCM_DTR; |
| 310 | } |
| 311 | } |
| 312 | qemu_chr_fe_ioctl(&s->cs, CHR_IOCTL_SERIAL_SET_TIOCM, &flags); |
| 313 | break; |
| 314 | } |
| 315 | case VendorDeviceOutRequest | FTDI_SET_FLOW_CTRL: { |
| 316 | uint8_t flow_control = index >> 8; |
| 317 | |
| 318 | usb_serial_set_flow_control(s, flow_control); |
| 319 | if (flow_control & FTDI_XON_XOFF_HS) { |
| 320 | usb_serial_set_xonxoff(s, value); |
| 321 | } |
| 322 | break; |
| 323 | } |
| 324 | case VendorDeviceOutRequest | FTDI_SET_BAUD: { |
| 325 | static const int subdivisors8[8] = { 0, 4, 2, 1, 3, 5, 6, 7 }; |
| 326 | int subdivisor8 = subdivisors8[((value & 0xc000) >> 14) |
| 327 | | ((index & 1) << 2)]; |
| 328 | int divisor = value & 0x3fff; |
| 329 | |
| 330 | /* chip special cases */ |
| 331 | if (divisor == 1 && subdivisor8 == 0) { |
| 332 | subdivisor8 = 4; |
| 333 | } |
| 334 | if (divisor == 0 && subdivisor8 == 0) { |
| 335 | divisor = 1; |
| 336 | } |
| 337 | |
| 338 | s->params.speed = (48000000 / 2) / (8 * divisor + subdivisor8); |
| 339 | trace_usb_serial_set_baud(bus->busnr, dev->addr, s->params.speed); |
| 340 | qemu_chr_fe_ioctl(&s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params); |
| 341 | break; |
| 342 | } |
| 343 | case VendorDeviceOutRequest | FTDI_SET_DATA: |
| 344 | switch (value & 0xff) { |
| 345 | case 7: |
| 346 | s->params.data_bits = 7; |
| 347 | break; |
| 348 | case 8: |
| 349 | s->params.data_bits = 8; |
| 350 | break; |
| 351 | default: |
| 352 | /* |
| 353 | * According to a comment in Linux's ftdi_sio.c original FTDI |
| 354 | * chips fall back to 8 data bits for unsupported data_bits |
| 355 | */ |
| 356 | trace_usb_serial_unsupported_data_bits(bus->busnr, dev->addr, |
| 357 | value & 0xff); |
| 358 | s->params.data_bits = 8; |
| 359 | } |
| 360 | |
| 361 | switch (value & FTDI_PARITY) { |
| 362 | case 0: |
| 363 | s->params.parity = 'N'; |
| 364 | break; |
| 365 | case FTDI_ODD: |
| 366 | s->params.parity = 'O'; |
| 367 | break; |
| 368 | case FTDI_EVEN: |
| 369 | s->params.parity = 'E'; |
| 370 | break; |
| 371 | default: |
| 372 | trace_usb_serial_unsupported_parity(bus->busnr, dev->addr, |
| 373 | value & FTDI_PARITY); |
| 374 | goto fail; |
| 375 | } |
| 376 | |
| 377 | switch (value & FTDI_STOP) { |
| 378 | case FTDI_STOP1: |
| 379 | s->params.stop_bits = 1; |
| 380 | break; |
| 381 | case FTDI_STOP2: |
| 382 | s->params.stop_bits = 2; |
| 383 | break; |
| 384 | default: |
| 385 | trace_usb_serial_unsupported_stopbits(bus->busnr, dev->addr, |
| 386 | value & FTDI_STOP); |
| 387 | goto fail; |
| 388 | } |
| 389 | |
| 390 | trace_usb_serial_set_data(bus->busnr, dev->addr, s->params.parity, |
| 391 | s->params.data_bits, s->params.stop_bits); |
| 392 | qemu_chr_fe_ioctl(&s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params); |
| 393 | /* TODO: TX ON/OFF */ |
| 394 | break; |
| 395 | case VendorDeviceRequest | FTDI_GET_MDM_ST: |
| 396 | data[0] = usb_get_modem_lines(s) | 1; |
| 397 | data[1] = FTDI_THRE | FTDI_TEMT; |
| 398 | p->actual_length = 2; |
| 399 | break; |
| 400 | case VendorDeviceOutRequest | FTDI_SET_EVENT_CHR: |
| 401 | /* TODO: handle it */ |
| 402 | s->event_chr = value; |
| 403 | break; |
| 404 | case VendorDeviceOutRequest | FTDI_SET_ERROR_CHR: |
| 405 | /* TODO: handle it */ |
| 406 | s->error_chr = value; |
| 407 | break; |
| 408 | case VendorDeviceOutRequest | FTDI_SET_LATENCY: |
| 409 | s->latency = value; |
| 410 | break; |
| 411 | case VendorDeviceRequest | FTDI_GET_LATENCY: |
| 412 | data[0] = s->latency; |
| 413 | p->actual_length = 1; |
| 414 | break; |
| 415 | default: |
| 416 | fail: |
| 417 | trace_usb_serial_unsupported_control(bus->busnr, dev->addr, request, |
| 418 | value); |
| 419 | p->status = USB_RET_STALL; |
| 420 | break; |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | static void usb_serial_token_in(USBSerialState *s, USBPacket *p) |
| 425 | { |
| 426 | const int max_packet_size = desc_iface0.eps[0].wMaxPacketSize; |
| 427 | int packet_len; |
| 428 | uint8_t header[2]; |
| 429 | |
| 430 | packet_len = p->iov.size; |
| 431 | if (packet_len <= 2) { |
| 432 | p->status = USB_RET_NAK; |
| 433 | return; |
| 434 | } |
| 435 | |
| 436 | header[0] = usb_get_modem_lines(s) | 1; |
| 437 | /* We do not have the uart details */ |
| 438 | /* handle serial break */ |
| 439 | if (s->event_trigger && s->event_trigger & FTDI_BI) { |
| 440 | s->event_trigger &= ~FTDI_BI; |
| 441 | header[1] = FTDI_BI; |
| 442 | usb_packet_copy(p, header, 2); |
| 443 | return; |
| 444 | } else { |
| 445 | header[1] = 0; |
| 446 | } |
| 447 | |
| 448 | if (!s->recv_used) { |
| 449 | p->status = USB_RET_NAK; |
| 450 | return; |
| 451 | } |
| 452 | |
| 453 | while (s->recv_used && packet_len > 2) { |
| 454 | int first_len, len; |
| 455 | |
| 456 | len = MIN(packet_len, max_packet_size); |
| 457 | len -= 2; |
| 458 | if (len > s->recv_used) { |
| 459 | len = s->recv_used; |
| 460 | } |
| 461 | |
| 462 | first_len = RECV_BUF - s->recv_ptr; |
| 463 | if (first_len > len) { |
| 464 | first_len = len; |
| 465 | } |
| 466 | usb_packet_copy(p, header, 2); |
| 467 | usb_packet_copy(p, s->recv_buf + s->recv_ptr, first_len); |
| 468 | if (len > first_len) { |
| 469 | usb_packet_copy(p, s->recv_buf, len - first_len); |
| 470 | } |
| 471 | s->recv_used -= len; |
| 472 | s->recv_ptr = (s->recv_ptr + len) % RECV_BUF; |
| 473 | packet_len -= len + 2; |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | static void usb_serial_handle_data(USBDevice *dev, USBPacket *p) |
| 478 | { |
| 479 | USBSerialState *s = USB_SERIAL(dev); |
| 480 | USBBus *bus = usb_bus_from_device(dev); |
| 481 | uint8_t devep = p->ep->nr; |
| 482 | struct iovec *iov; |
| 483 | int i; |
| 484 | |
| 485 | switch (p->pid) { |
| 486 | case USB_TOKEN_OUT: |
| 487 | if (devep != 2) { |
| 488 | goto fail; |
| 489 | } |
| 490 | for (i = 0; i < p->iov.niov; i++) { |
| 491 | iov = p->iov.iov + i; |
| 492 | /* |
| 493 | * XXX this blocks entire thread. Rewrite to use |
| 494 | * qemu_chr_fe_write and background I/O callbacks |
| 495 | */ |
| 496 | qemu_chr_fe_write_all(&s->cs, iov->iov_base, iov->iov_len); |
| 497 | } |
| 498 | p->actual_length = p->iov.size; |
| 499 | break; |
| 500 | |
| 501 | case USB_TOKEN_IN: |
| 502 | if (devep != 1) { |
| 503 | goto fail; |
| 504 | } |
| 505 | usb_serial_token_in(s, p); |
| 506 | break; |
| 507 | |
| 508 | default: |
| 509 | trace_usb_serial_bad_token(bus->busnr, dev->addr); |
| 510 | fail: |
| 511 | p->status = USB_RET_STALL; |
| 512 | break; |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | static int usb_serial_can_read(void *opaque) |
| 517 | { |
| 518 | USBSerialState *s = opaque; |
| 519 | |
| 520 | if (!s->dev.attached) { |
| 521 | return 0; |
| 522 | } |
| 523 | return RECV_BUF - s->recv_used; |
| 524 | } |
| 525 | |
| 526 | static void usb_serial_read(void *opaque, const uint8_t *buf, int size) |
| 527 | { |
| 528 | USBSerialState *s = opaque; |
| 529 | int first_size, start; |
| 530 | |
| 531 | /* room in the buffer? */ |
| 532 | if (size > (RECV_BUF - s->recv_used)) { |
| 533 | size = RECV_BUF - s->recv_used; |
| 534 | } |
| 535 | |
| 536 | start = s->recv_ptr + s->recv_used; |
| 537 | if (start < RECV_BUF) { |
| 538 | /* copy data to end of buffer */ |
| 539 | first_size = RECV_BUF - start; |
| 540 | if (first_size > size) { |
| 541 | first_size = size; |
| 542 | } |
| 543 | |
| 544 | memcpy(s->recv_buf + start, buf, first_size); |
| 545 | |
| 546 | /* wrap around to front if needed */ |
| 547 | if (size > first_size) { |
| 548 | memcpy(s->recv_buf, buf + first_size, size - first_size); |
| 549 | } |
| 550 | } else { |
| 551 | start -= RECV_BUF; |
| 552 | memcpy(s->recv_buf + start, buf, size); |
| 553 | } |
| 554 | s->recv_used += size; |
| 555 | |
| 556 | usb_wakeup(s->intr, 0); |
| 557 | } |
| 558 | |
| 559 | static void usb_serial_event(void *opaque, QEMUChrEvent event) |
| 560 | { |
| 561 | USBSerialState *s = opaque; |
| 562 | |
| 563 | switch (event) { |
| 564 | case CHR_EVENT_BREAK: |
| 565 | s->event_trigger |= FTDI_BI; |
| 566 | break; |
| 567 | case CHR_EVENT_OPENED: |
| 568 | if (!s->always_plugged && !s->dev.attached) { |
| 569 | usb_device_attach(&s->dev, &error_abort); |
| 570 | } |
| 571 | break; |
| 572 | case CHR_EVENT_CLOSED: |
| 573 | if (!s->always_plugged && s->dev.attached) { |
| 574 | usb_device_detach(&s->dev); |
| 575 | } |
| 576 | break; |
| 577 | case CHR_EVENT_MUX_IN: |
| 578 | case CHR_EVENT_MUX_OUT: |
| 579 | /* Ignore */ |
| 580 | break; |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | static void usb_serial_realize(USBDevice *dev, Error **errp) |
| 585 | { |
| 586 | USBSerialState *s = USB_SERIAL(dev); |
| 587 | Error *local_err = NULL; |
| 588 | |
| 589 | usb_desc_create_serial(dev); |
| 590 | usb_desc_init(dev); |
| 591 | dev->auto_attach = 0; |
| 592 | |
| 593 | if (!qemu_chr_fe_backend_connected(&s->cs)) { |
| 594 | error_setg(errp, "Property chardev is required"); |
| 595 | return; |
| 596 | } |
| 597 | |
| 598 | usb_check_attach(dev, &local_err); |
| 599 | if (local_err) { |
| 600 | error_propagate(errp, local_err); |
| 601 | return; |
| 602 | } |
| 603 | |
| 604 | qemu_chr_fe_set_handlers(&s->cs, usb_serial_can_read, usb_serial_read, |
| 605 | usb_serial_event, NULL, s, NULL, true); |
| 606 | usb_serial_handle_reset(dev); |
| 607 | |
| 608 | if ((s->always_plugged || qemu_chr_fe_backend_open(&s->cs)) && |
| 609 | !dev->attached) { |
| 610 | usb_device_attach(dev, &error_abort); |
| 611 | } |
| 612 | s->intr = usb_ep_get(dev, USB_TOKEN_IN, 1); |
| 613 | } |
| 614 | |
| 615 | static USBDevice *usb_braille_init(void) |
| 616 | { |
| 617 | USBDevice *dev; |
| 618 | Chardev *cdrv; |
| 619 | |
| 620 | cdrv = qemu_chr_new("braille", "braille", NULL); |
| 621 | if (!cdrv) { |
| 622 | return NULL; |
| 623 | } |
| 624 | |
| 625 | dev = USB_DEVICE(qdev_new("usb-braille")); |
| 626 | qdev_prop_set_chr(&dev->qdev, "chardev", cdrv); |
| 627 | return dev; |
| 628 | } |
| 629 | |
| 630 | static const VMStateDescription vmstate_usb_serial = { |
| 631 | .name = "usb-serial", |
| 632 | .unmigratable = 1, |
| 633 | }; |
| 634 | |
| 635 | static const Property serial_properties[] = { |
| 636 | DEFINE_PROP_CHR("chardev", USBSerialState, cs), |
| 637 | DEFINE_PROP_BOOL("always-plugged", USBSerialState, always_plugged, false), |
| 638 | }; |
| 639 | |
| 640 | static void usb_serial_dev_class_init(ObjectClass *klass, const void *data) |
| 641 | { |
| 642 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 643 | USBDeviceClass *uc = USB_DEVICE_CLASS(klass); |
| 644 | |
| 645 | uc->realize = usb_serial_realize; |
| 646 | uc->handle_reset = usb_serial_handle_reset; |
| 647 | uc->handle_control = usb_serial_handle_control; |
| 648 | uc->handle_data = usb_serial_handle_data; |
| 649 | dc->vmsd = &vmstate_usb_serial; |
| 650 | set_bit(DEVICE_CATEGORY_INPUT, dc->categories); |
| 651 | } |
| 652 | |
| 653 | static const TypeInfo usb_serial_dev_type_info = { |
| 654 | .name = TYPE_USB_SERIAL, |
| 655 | .parent = TYPE_USB_DEVICE, |
| 656 | .instance_size = sizeof(USBSerialState), |
| 657 | .abstract = true, |
| 658 | .class_init = usb_serial_dev_class_init, |
| 659 | }; |
| 660 | |
| 661 | static void usb_serial_class_initfn(ObjectClass *klass, const void *data) |
| 662 | { |
| 663 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 664 | USBDeviceClass *uc = USB_DEVICE_CLASS(klass); |
| 665 | |
| 666 | uc->product_desc = "QEMU USB Serial"; |
| 667 | uc->usb_desc = &desc_serial; |
| 668 | device_class_set_props(dc, serial_properties); |
| 669 | } |
| 670 | |
| 671 | static const TypeInfo serial_info = { |
| 672 | .name = "usb-serial", |
| 673 | .parent = TYPE_USB_SERIAL, |
| 674 | .class_init = usb_serial_class_initfn, |
| 675 | }; |
| 676 | |
| 677 | static const Property braille_properties[] = { |
| 678 | DEFINE_PROP_CHR("chardev", USBSerialState, cs), |
| 679 | }; |
| 680 | |
| 681 | static void usb_braille_class_initfn(ObjectClass *klass, const void *data) |
| 682 | { |
| 683 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 684 | USBDeviceClass *uc = USB_DEVICE_CLASS(klass); |
| 685 | |
| 686 | uc->product_desc = "QEMU USB Braille"; |
| 687 | uc->usb_desc = &desc_braille; |
| 688 | device_class_set_props(dc, braille_properties); |
| 689 | } |
| 690 | |
| 691 | static const TypeInfo braille_info = { |
| 692 | .name = "usb-braille", |
| 693 | .parent = TYPE_USB_SERIAL, |
| 694 | .class_init = usb_braille_class_initfn, |
| 695 | }; |
| 696 | |
| 697 | static void usb_serial_register_types(void) |
| 698 | { |
| 699 | type_register_static(&usb_serial_dev_type_info); |
| 700 | type_register_static(&serial_info); |
| 701 | type_register_static(&braille_info); |
| 702 | usb_legacy_register("usb-braille", "braille", usb_braille_init); |
| 703 | } |
| 704 | |
| 705 | type_init(usb_serial_register_types) |