1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Fintek F81232 USB to serial adaptor driver 4 * Fintek F81532A/534A/535/536 USB to 2/4/8/12 serial adaptor driver 5 * 6 * Copyright (C) 2012 Greg Kroah-Hartman (gregkh@linuxfoundation.org) 7 * Copyright (C) 2012 Linux Foundation 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/errno.h> 12 #include <linux/slab.h> 13 #include <linux/tty.h> 14 #include <linux/tty_driver.h> 15 #include <linux/tty_flip.h> 16 #include <linux/serial.h> 17 #include <linux/module.h> 18 #include <linux/moduleparam.h> 19 #include <linux/mutex.h> 20 #include <linux/uaccess.h> 21 #include <linux/usb.h> 22 #include <linux/usb/serial.h> 23 #include <linux/serial_reg.h> 24 25 #define F81232_ID \ 26 { USB_DEVICE(0x1934, 0x0706) } /* 1 port UART device */ 27 28 #define F81534A_SERIES_ID \ 29 { USB_DEVICE(0x2c42, 0x1602) }, /* In-Box 2 port UART device */ \ 30 { USB_DEVICE(0x2c42, 0x1604) }, /* In-Box 4 port UART device */ \ 31 { USB_DEVICE(0x2c42, 0x1605) }, /* In-Box 8 port UART device */ \ 32 { USB_DEVICE(0x2c42, 0x1606) }, /* In-Box 12 port UART device */ \ 33 { USB_DEVICE(0x2c42, 0x1608) }, /* Non-Flash type */ \ 34 { USB_DEVICE(0x2c42, 0x1632) }, /* 2 port UART device */ \ 35 { USB_DEVICE(0x2c42, 0x1634) }, /* 4 port UART device */ \ 36 { USB_DEVICE(0x2c42, 0x1635) }, /* 8 port UART device */ \ 37 { USB_DEVICE(0x2c42, 0x1636) } /* 12 port UART device */ 38 39 #define F81534A_CTRL_ID \ 40 { USB_DEVICE(0x2c42, 0x16f8) } /* Global control device */ 41 42 static const struct usb_device_id f81232_id_table[] = { 43 F81232_ID, 44 { } /* Terminating entry */ 45 }; 46 47 static const struct usb_device_id f81534a_id_table[] = { 48 F81534A_SERIES_ID, 49 { } /* Terminating entry */ 50 }; 51 52 static const struct usb_device_id f81534a_ctrl_id_table[] = { 53 F81534A_CTRL_ID, 54 { } /* Terminating entry */ 55 }; 56 57 static const struct usb_device_id combined_id_table[] = { 58 F81232_ID, 59 F81534A_SERIES_ID, 60 F81534A_CTRL_ID, 61 { } /* Terminating entry */ 62 }; 63 MODULE_DEVICE_TABLE(usb, combined_id_table); 64 65 /* Maximum baudrate for F81232 */ 66 #define F81232_MAX_BAUDRATE 1500000 67 #define F81232_DEF_BAUDRATE 9600 68 69 /* USB Control EP parameter */ 70 #define F81232_REGISTER_REQUEST 0xa0 71 #define F81232_GET_REGISTER 0xc0 72 #define F81232_SET_REGISTER 0x40 73 #define F81534A_ACCESS_REG_RETRY 2 74 75 #define SERIAL_BASE_ADDRESS 0x0120 76 #define RECEIVE_BUFFER_REGISTER (0x00 + SERIAL_BASE_ADDRESS) 77 #define INTERRUPT_ENABLE_REGISTER (0x01 + SERIAL_BASE_ADDRESS) 78 #define FIFO_CONTROL_REGISTER (0x02 + SERIAL_BASE_ADDRESS) 79 #define LINE_CONTROL_REGISTER (0x03 + SERIAL_BASE_ADDRESS) 80 #define MODEM_CONTROL_REGISTER (0x04 + SERIAL_BASE_ADDRESS) 81 #define LINE_STATUS_REGISTER (0x05 + SERIAL_BASE_ADDRESS) 82 #define MODEM_STATUS_REGISTER (0x06 + SERIAL_BASE_ADDRESS) 83 84 /* 85 * F81232 Clock registers (106h) 86 * 87 * Bit1-0: Clock source selector 88 * 00: 1.846MHz. 89 * 01: 18.46MHz. 90 * 10: 24MHz. 91 * 11: 14.77MHz. 92 */ 93 #define F81232_CLK_REGISTER 0x106 94 #define F81232_CLK_1_846_MHZ 0 95 #define F81232_CLK_18_46_MHZ BIT(0) 96 #define F81232_CLK_24_MHZ BIT(1) 97 #define F81232_CLK_14_77_MHZ (BIT(1) | BIT(0)) 98 #define F81232_CLK_MASK GENMASK(1, 0) 99 100 #define F81534A_MODE_REG 0x107 101 #define F81534A_TRIGGER_MASK GENMASK(3, 2) 102 #define F81534A_TRIGGER_MULTIPLE_4X BIT(3) 103 #define F81534A_FIFO_128BYTE (BIT(1) | BIT(0)) 104 105 /* Serial port self GPIO control, 2bytes [control&output data][input data] */ 106 #define F81534A_GPIO_REG 0x10e 107 #define F81534A_GPIO_MODE2_DIR BIT(6) /* 1: input, 0: output */ 108 #define F81534A_GPIO_MODE1_DIR BIT(5) 109 #define F81534A_GPIO_MODE0_DIR BIT(4) 110 #define F81534A_GPIO_MODE2_OUTPUT BIT(2) 111 #define F81534A_GPIO_MODE1_OUTPUT BIT(1) 112 #define F81534A_GPIO_MODE0_OUTPUT BIT(0) 113 114 #define F81534A_CTRL_CMD_ENABLE_PORT 0x116 115 116 struct f81232_private { 117 struct mutex lock; 118 u8 modem_control; 119 u8 modem_status; 120 u8 shadow_lcr; 121 speed_t baud_base; 122 struct work_struct lsr_work; 123 struct work_struct interrupt_work; 124 struct usb_serial_port *port; 125 }; 126 127 static u32 const baudrate_table[] = { 115200, 921600, 1152000, 1500000 }; 128 static u8 const clock_table[] = { F81232_CLK_1_846_MHZ, F81232_CLK_14_77_MHZ, 129 F81232_CLK_18_46_MHZ, F81232_CLK_24_MHZ }; 130 131 static int calc_baud_divisor(speed_t baudrate, speed_t clockrate) 132 { 133 if (!baudrate) 134 return 0; 135 136 return DIV_ROUND_CLOSEST(clockrate, baudrate); 137 } 138 139 static int f81232_get_register(struct usb_serial_port *port, u16 reg, u8 *val) 140 { 141 int status; 142 struct usb_device *dev = port->serial->dev; 143 144 status = usb_control_msg_recv(dev, 145 0, 146 F81232_REGISTER_REQUEST, 147 F81232_GET_REGISTER, 148 reg, 149 0, 150 val, 151 sizeof(*val), 152 USB_CTRL_GET_TIMEOUT, 153 GFP_KERNEL); 154 if (status) { 155 dev_err(&port->dev, "%s failed status: %d\n", __func__, status); 156 status = usb_translate_errors(status); 157 } 158 159 return status; 160 } 161 162 static int f81232_set_register(struct usb_serial_port *port, u16 reg, u8 val) 163 { 164 int status; 165 struct usb_device *dev = port->serial->dev; 166 167 status = usb_control_msg_send(dev, 168 0, 169 F81232_REGISTER_REQUEST, 170 F81232_SET_REGISTER, 171 reg, 172 0, 173 &val, 174 sizeof(val), 175 USB_CTRL_SET_TIMEOUT, 176 GFP_KERNEL); 177 if (status) { 178 dev_err(&port->dev, "%s failed status: %d\n", __func__, status); 179 status = usb_translate_errors(status); 180 } 181 182 return status; 183 } 184 185 static int f81232_set_mask_register(struct usb_serial_port *port, u16 reg, 186 u8 mask, u8 val) 187 { 188 int status; 189 u8 tmp; 190 191 status = f81232_get_register(port, reg, &tmp); 192 if (status) 193 return status; 194 195 tmp = (tmp & ~mask) | (val & mask); 196 197 return f81232_set_register(port, reg, tmp); 198 } 199 200 static void f81232_read_msr(struct usb_serial_port *port) 201 { 202 int status; 203 u8 current_msr; 204 struct tty_struct *tty; 205 struct f81232_private *priv = usb_get_serial_port_data(port); 206 207 mutex_lock(&priv->lock); 208 status = f81232_get_register(port, MODEM_STATUS_REGISTER, 209 ¤t_msr); 210 if (status) { 211 dev_err(&port->dev, "%s fail, status: %d\n", __func__, status); 212 mutex_unlock(&priv->lock); 213 return; 214 } 215 216 if (!(current_msr & UART_MSR_ANY_DELTA)) { 217 mutex_unlock(&priv->lock); 218 return; 219 } 220 221 priv->modem_status = current_msr; 222 223 if (current_msr & UART_MSR_DCTS) 224 port->icount.cts++; 225 if (current_msr & UART_MSR_DDSR) 226 port->icount.dsr++; 227 if (current_msr & UART_MSR_TERI) 228 port->icount.rng++; 229 if (current_msr & UART_MSR_DDCD) { 230 port->icount.dcd++; 231 tty = tty_port_tty_get(&port->port); 232 if (tty) { 233 usb_serial_handle_dcd_change(port, tty, 234 current_msr & UART_MSR_DCD); 235 236 tty_kref_put(tty); 237 } 238 } 239 240 wake_up_interruptible(&port->port.delta_msr_wait); 241 mutex_unlock(&priv->lock); 242 } 243 244 static int f81232_set_mctrl(struct usb_serial_port *port, 245 unsigned int set, unsigned int clear) 246 { 247 u8 val; 248 int status; 249 struct f81232_private *priv = usb_get_serial_port_data(port); 250 251 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) 252 return 0; /* no change */ 253 254 /* 'set' takes precedence over 'clear' */ 255 clear &= ~set; 256 257 /* force enable interrupt with OUT2 */ 258 mutex_lock(&priv->lock); 259 val = UART_MCR_OUT2 | priv->modem_control; 260 261 if (clear & TIOCM_DTR) 262 val &= ~UART_MCR_DTR; 263 264 if (clear & TIOCM_RTS) 265 val &= ~UART_MCR_RTS; 266 267 if (set & TIOCM_DTR) 268 val |= UART_MCR_DTR; 269 270 if (set & TIOCM_RTS) 271 val |= UART_MCR_RTS; 272 273 dev_dbg(&port->dev, "%s new:%02x old:%02x\n", __func__, 274 val, priv->modem_control); 275 276 status = f81232_set_register(port, MODEM_CONTROL_REGISTER, val); 277 if (status) { 278 dev_err(&port->dev, "%s set MCR status < 0\n", __func__); 279 mutex_unlock(&priv->lock); 280 return status; 281 } 282 283 priv->modem_control = val; 284 mutex_unlock(&priv->lock); 285 286 return 0; 287 } 288 289 static void f81232_update_line_status(struct usb_serial_port *port, 290 unsigned char *data, 291 size_t actual_length) 292 { 293 struct f81232_private *priv = usb_get_serial_port_data(port); 294 295 if (!actual_length) 296 return; 297 298 switch (data[0] & 0x07) { 299 case 0x00: /* msr change */ 300 dev_dbg(&port->dev, "IIR: MSR Change: %02x\n", data[0]); 301 schedule_work(&priv->interrupt_work); 302 break; 303 case 0x02: /* tx-empty */ 304 break; 305 case 0x04: /* rx data available */ 306 break; 307 case 0x06: /* lsr change */ 308 /* we can forget it. the LSR will read from bulk-in */ 309 dev_dbg(&port->dev, "IIR: LSR Change: %02x\n", data[0]); 310 break; 311 } 312 } 313 314 static void f81232_read_int_callback(struct urb *urb) 315 { 316 struct usb_serial_port *port = urb->context; 317 unsigned char *data = urb->transfer_buffer; 318 unsigned int actual_length = urb->actual_length; 319 int status = urb->status; 320 int retval; 321 322 switch (status) { 323 case 0: 324 /* success */ 325 break; 326 case -ECONNRESET: 327 case -ENOENT: 328 case -ESHUTDOWN: 329 /* this urb is terminated, clean up */ 330 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 331 __func__, status); 332 return; 333 default: 334 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 335 __func__, status); 336 goto exit; 337 } 338 339 usb_serial_debug_data(&port->dev, __func__, 340 urb->actual_length, urb->transfer_buffer); 341 342 f81232_update_line_status(port, data, actual_length); 343 344 exit: 345 retval = usb_submit_urb(urb, GFP_ATOMIC); 346 if (retval) 347 dev_err(&urb->dev->dev, 348 "%s - usb_submit_urb failed with result %d\n", 349 __func__, retval); 350 } 351 352 static char f81232_handle_lsr(struct usb_serial_port *port, u8 lsr) 353 { 354 struct f81232_private *priv = usb_get_serial_port_data(port); 355 char tty_flag = TTY_NORMAL; 356 357 if (!(lsr & UART_LSR_BRK_ERROR_BITS)) 358 return tty_flag; 359 360 if (lsr & UART_LSR_BI) { 361 tty_flag = TTY_BREAK; 362 port->icount.brk++; 363 usb_serial_handle_break(port); 364 } else if (lsr & UART_LSR_PE) { 365 tty_flag = TTY_PARITY; 366 port->icount.parity++; 367 } else if (lsr & UART_LSR_FE) { 368 tty_flag = TTY_FRAME; 369 port->icount.frame++; 370 } 371 372 if (lsr & UART_LSR_OE) { 373 port->icount.overrun++; 374 schedule_work(&priv->lsr_work); 375 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 376 } 377 378 return tty_flag; 379 } 380 381 static void f81232_process_read_urb(struct urb *urb) 382 { 383 struct usb_serial_port *port = urb->context; 384 unsigned char *data = urb->transfer_buffer; 385 char tty_flag; 386 unsigned int i; 387 u8 lsr; 388 389 /* 390 * When opening the port we get a 1-byte packet with the current LSR, 391 * which we discard. 392 */ 393 if ((urb->actual_length < 2) || (urb->actual_length % 2)) 394 return; 395 396 /* bulk-in data: [LSR(1Byte)+DATA(1Byte)][LSR(1Byte)+DATA(1Byte)]... */ 397 398 for (i = 0; i < urb->actual_length; i += 2) { 399 lsr = data[i]; 400 tty_flag = f81232_handle_lsr(port, lsr); 401 402 if (port->sysrq) { 403 if (usb_serial_handle_sysrq_char(port, data[i + 1])) 404 continue; 405 } 406 407 tty_insert_flip_char(&port->port, data[i + 1], tty_flag); 408 } 409 410 tty_flip_buffer_push(&port->port); 411 } 412 413 static void f81534a_process_read_urb(struct urb *urb) 414 { 415 struct usb_serial_port *port = urb->context; 416 unsigned char *data = urb->transfer_buffer; 417 char tty_flag; 418 unsigned int i; 419 u8 lsr; 420 u8 len; 421 422 if (urb->actual_length < 3) { 423 dev_err(&port->dev, "short message received: %d\n", 424 urb->actual_length); 425 return; 426 } 427 428 len = data[0]; 429 if (len != urb->actual_length) { 430 dev_err(&port->dev, "malformed message received: %d (%d)\n", 431 urb->actual_length, len); 432 return; 433 } 434 435 /* bulk-in data: [LEN][Data.....][LSR] */ 436 lsr = data[len - 1]; 437 tty_flag = f81232_handle_lsr(port, lsr); 438 439 if (port->sysrq) { 440 for (i = 1; i < len - 1; ++i) { 441 if (!usb_serial_handle_sysrq_char(port, data[i])) { 442 tty_insert_flip_char(&port->port, data[i], 443 tty_flag); 444 } 445 } 446 } else { 447 tty_insert_flip_string_fixed_flag(&port->port, &data[1], 448 tty_flag, len - 2); 449 } 450 451 tty_flip_buffer_push(&port->port); 452 } 453 454 static void f81232_break_ctl(struct tty_struct *tty, int break_state) 455 { 456 struct usb_serial_port *port = tty->driver_data; 457 struct f81232_private *priv = usb_get_serial_port_data(port); 458 int status; 459 460 mutex_lock(&priv->lock); 461 462 if (break_state) 463 priv->shadow_lcr |= UART_LCR_SBC; 464 else 465 priv->shadow_lcr &= ~UART_LCR_SBC; 466 467 status = f81232_set_register(port, LINE_CONTROL_REGISTER, 468 priv->shadow_lcr); 469 if (status) 470 dev_err(&port->dev, "set break failed: %d\n", status); 471 472 mutex_unlock(&priv->lock); 473 } 474 475 static int f81232_find_clk(speed_t baudrate) 476 { 477 int idx; 478 479 for (idx = 0; idx < ARRAY_SIZE(baudrate_table); ++idx) { 480 if (baudrate <= baudrate_table[idx] && 481 baudrate_table[idx] % baudrate == 0) 482 return idx; 483 } 484 485 return -EINVAL; 486 } 487 488 static void f81232_set_baudrate(struct tty_struct *tty, 489 struct usb_serial_port *port, speed_t baudrate, 490 speed_t old_baudrate) 491 { 492 struct f81232_private *priv = usb_get_serial_port_data(port); 493 u8 lcr; 494 int divisor; 495 int status = 0; 496 int i; 497 int idx; 498 speed_t baud_list[] = { baudrate, old_baudrate, F81232_DEF_BAUDRATE }; 499 500 for (i = 0; i < ARRAY_SIZE(baud_list); ++i) { 501 idx = f81232_find_clk(baud_list[i]); 502 if (idx >= 0) { 503 baudrate = baud_list[i]; 504 tty_encode_baud_rate(tty, baudrate, baudrate); 505 break; 506 } 507 } 508 509 if (idx < 0) 510 return; 511 512 priv->baud_base = baudrate_table[idx]; 513 divisor = calc_baud_divisor(baudrate, priv->baud_base); 514 515 status = f81232_set_mask_register(port, F81232_CLK_REGISTER, 516 F81232_CLK_MASK, clock_table[idx]); 517 if (status) { 518 dev_err(&port->dev, "%s failed to set CLK_REG: %d\n", 519 __func__, status); 520 return; 521 } 522 523 status = f81232_get_register(port, LINE_CONTROL_REGISTER, 524 &lcr); /* get LCR */ 525 if (status) { 526 dev_err(&port->dev, "%s failed to get LCR: %d\n", 527 __func__, status); 528 return; 529 } 530 531 status = f81232_set_register(port, LINE_CONTROL_REGISTER, 532 lcr | UART_LCR_DLAB); /* Enable DLAB */ 533 if (status) { 534 dev_err(&port->dev, "%s failed to set DLAB: %d\n", 535 __func__, status); 536 return; 537 } 538 539 status = f81232_set_register(port, RECEIVE_BUFFER_REGISTER, 540 divisor & 0x00ff); /* low */ 541 if (status) { 542 dev_err(&port->dev, "%s failed to set baudrate MSB: %d\n", 543 __func__, status); 544 goto reapply_lcr; 545 } 546 547 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, 548 (divisor & 0xff00) >> 8); /* high */ 549 if (status) { 550 dev_err(&port->dev, "%s failed to set baudrate LSB: %d\n", 551 __func__, status); 552 } 553 554 reapply_lcr: 555 status = f81232_set_register(port, LINE_CONTROL_REGISTER, 556 lcr & ~UART_LCR_DLAB); 557 if (status) { 558 dev_err(&port->dev, "%s failed to set DLAB: %d\n", 559 __func__, status); 560 } 561 } 562 563 static int f81232_port_enable(struct usb_serial_port *port) 564 { 565 u8 val; 566 int status; 567 568 /* fifo on, trigger8, clear TX/RX*/ 569 val = UART_FCR_TRIGGER_8 | UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | 570 UART_FCR_CLEAR_XMIT; 571 572 status = f81232_set_register(port, FIFO_CONTROL_REGISTER, val); 573 if (status) { 574 dev_err(&port->dev, "%s failed to set FCR: %d\n", 575 __func__, status); 576 return status; 577 } 578 579 /* MSR Interrupt only, LSR will read from Bulk-in odd byte */ 580 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, 581 UART_IER_MSI); 582 if (status) { 583 dev_err(&port->dev, "%s failed to set IER: %d\n", 584 __func__, status); 585 return status; 586 } 587 588 return 0; 589 } 590 591 static int f81232_port_disable(struct usb_serial_port *port) 592 { 593 int status; 594 595 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, 0); 596 if (status) { 597 dev_err(&port->dev, "%s failed to set IER: %d\n", 598 __func__, status); 599 return status; 600 } 601 602 return 0; 603 } 604 605 static void f81232_set_termios(struct tty_struct *tty, 606 struct usb_serial_port *port, 607 const struct ktermios *old_termios) 608 { 609 struct f81232_private *priv = usb_get_serial_port_data(port); 610 u8 new_lcr = 0; 611 int status = 0; 612 speed_t baudrate; 613 speed_t old_baud; 614 615 /* Don't change anything if nothing has changed */ 616 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) 617 return; 618 619 if (C_BAUD(tty) == B0) 620 f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS); 621 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 622 f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0); 623 624 baudrate = tty_get_baud_rate(tty); 625 if (baudrate > 0) { 626 if (old_termios) 627 old_baud = tty_termios_baud_rate(old_termios); 628 else 629 old_baud = F81232_DEF_BAUDRATE; 630 631 f81232_set_baudrate(tty, port, baudrate, old_baud); 632 } 633 634 if (C_PARENB(tty)) { 635 new_lcr |= UART_LCR_PARITY; 636 637 if (!C_PARODD(tty)) 638 new_lcr |= UART_LCR_EPAR; 639 640 if (C_CMSPAR(tty)) 641 new_lcr |= UART_LCR_SPAR; 642 } 643 644 if (C_CSTOPB(tty)) 645 new_lcr |= UART_LCR_STOP; 646 647 new_lcr |= UART_LCR_WLEN(tty_get_char_size(tty->termios.c_cflag)); 648 649 mutex_lock(&priv->lock); 650 651 new_lcr |= (priv->shadow_lcr & UART_LCR_SBC); 652 status = f81232_set_register(port, LINE_CONTROL_REGISTER, new_lcr); 653 if (status) { 654 dev_err(&port->dev, "%s failed to set LCR: %d\n", 655 __func__, status); 656 } 657 658 priv->shadow_lcr = new_lcr; 659 660 mutex_unlock(&priv->lock); 661 } 662 663 static int f81232_tiocmget(struct tty_struct *tty) 664 { 665 int r; 666 struct usb_serial_port *port = tty->driver_data; 667 struct f81232_private *port_priv = usb_get_serial_port_data(port); 668 u8 mcr, msr; 669 670 /* force get current MSR changed state */ 671 f81232_read_msr(port); 672 673 mutex_lock(&port_priv->lock); 674 mcr = port_priv->modem_control; 675 msr = port_priv->modem_status; 676 mutex_unlock(&port_priv->lock); 677 678 r = (mcr & UART_MCR_DTR ? TIOCM_DTR : 0) | 679 (mcr & UART_MCR_RTS ? TIOCM_RTS : 0) | 680 (msr & UART_MSR_CTS ? TIOCM_CTS : 0) | 681 (msr & UART_MSR_DCD ? TIOCM_CAR : 0) | 682 (msr & UART_MSR_RI ? TIOCM_RI : 0) | 683 (msr & UART_MSR_DSR ? TIOCM_DSR : 0); 684 685 return r; 686 } 687 688 static int f81232_tiocmset(struct tty_struct *tty, 689 unsigned int set, unsigned int clear) 690 { 691 struct usb_serial_port *port = tty->driver_data; 692 693 return f81232_set_mctrl(port, set, clear); 694 } 695 696 static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port) 697 { 698 int result; 699 700 result = f81232_port_enable(port); 701 if (result) 702 return result; 703 704 /* Setup termios */ 705 if (tty) 706 f81232_set_termios(tty, port, NULL); 707 708 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 709 if (result) { 710 dev_err(&port->dev, "%s - failed submitting interrupt urb," 711 " error %d\n", __func__, result); 712 return result; 713 } 714 715 result = usb_serial_generic_open(tty, port); 716 if (result) { 717 usb_kill_urb(port->interrupt_in_urb); 718 return result; 719 } 720 721 return 0; 722 } 723 724 static int f81534a_open(struct tty_struct *tty, struct usb_serial_port *port) 725 { 726 int status; 727 u8 mask; 728 u8 val; 729 730 val = F81534A_TRIGGER_MULTIPLE_4X | F81534A_FIFO_128BYTE; 731 mask = F81534A_TRIGGER_MASK | F81534A_FIFO_128BYTE; 732 733 status = f81232_set_mask_register(port, F81534A_MODE_REG, mask, val); 734 if (status) { 735 dev_err(&port->dev, "failed to set MODE_REG: %d\n", status); 736 return status; 737 } 738 739 return f81232_open(tty, port); 740 } 741 742 static void f81232_close(struct usb_serial_port *port) 743 { 744 struct f81232_private *port_priv = usb_get_serial_port_data(port); 745 746 f81232_port_disable(port); 747 usb_serial_generic_close(port); 748 usb_kill_urb(port->interrupt_in_urb); 749 flush_work(&port_priv->interrupt_work); 750 flush_work(&port_priv->lsr_work); 751 } 752 753 static void f81232_dtr_rts(struct usb_serial_port *port, int on) 754 { 755 if (on) 756 f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0); 757 else 758 f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS); 759 } 760 761 static bool f81232_tx_empty(struct usb_serial_port *port) 762 { 763 int status; 764 u8 tmp; 765 766 status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp); 767 if (!status) { 768 if ((tmp & UART_LSR_TEMT) != UART_LSR_TEMT) 769 return false; 770 } 771 772 return true; 773 } 774 775 static int f81232_carrier_raised(struct usb_serial_port *port) 776 { 777 u8 msr; 778 struct f81232_private *priv = usb_get_serial_port_data(port); 779 780 mutex_lock(&priv->lock); 781 msr = priv->modem_status; 782 mutex_unlock(&priv->lock); 783 784 if (msr & UART_MSR_DCD) 785 return 1; 786 return 0; 787 } 788 789 static void f81232_get_serial(struct tty_struct *tty, struct serial_struct *ss) 790 { 791 struct usb_serial_port *port = tty->driver_data; 792 struct f81232_private *priv = usb_get_serial_port_data(port); 793 794 ss->baud_base = priv->baud_base; 795 } 796 797 static void f81232_interrupt_work(struct work_struct *work) 798 { 799 struct f81232_private *priv = 800 container_of(work, struct f81232_private, interrupt_work); 801 802 f81232_read_msr(priv->port); 803 } 804 805 static void f81232_lsr_worker(struct work_struct *work) 806 { 807 struct f81232_private *priv; 808 struct usb_serial_port *port; 809 int status; 810 u8 tmp; 811 812 priv = container_of(work, struct f81232_private, lsr_work); 813 port = priv->port; 814 815 status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp); 816 if (status) 817 dev_warn(&port->dev, "read LSR failed: %d\n", status); 818 } 819 820 static int f81534a_ctrl_set_register(struct usb_interface *intf, u16 reg, 821 u16 size, void *val) 822 { 823 struct usb_device *dev = interface_to_usbdev(intf); 824 int retry = F81534A_ACCESS_REG_RETRY; 825 int status; 826 827 while (retry--) { 828 status = usb_control_msg_send(dev, 829 0, 830 F81232_REGISTER_REQUEST, 831 F81232_SET_REGISTER, 832 reg, 833 0, 834 val, 835 size, 836 USB_CTRL_SET_TIMEOUT, 837 GFP_KERNEL); 838 if (status) { 839 status = usb_translate_errors(status); 840 if (status == -EIO) 841 continue; 842 } 843 844 break; 845 } 846 847 if (status) { 848 dev_err(&intf->dev, "failed to set register 0x%x: %d\n", 849 reg, status); 850 } 851 852 return status; 853 } 854 855 static int f81534a_ctrl_enable_all_ports(struct usb_interface *intf, bool en) 856 { 857 unsigned char enable[2] = {0}; 858 int status; 859 860 /* 861 * Enable all available serial ports, define as following: 862 * bit 15 : Reset behavior (when HUB got soft reset) 863 * 0: maintain all serial port enabled state. 864 * 1: disable all serial port. 865 * bit 0~11 : Serial port enable bit. 866 */ 867 if (en) { 868 enable[0] = 0xff; 869 enable[1] = 0x8f; 870 } 871 872 status = f81534a_ctrl_set_register(intf, F81534A_CTRL_CMD_ENABLE_PORT, 873 sizeof(enable), enable); 874 if (status) 875 dev_err(&intf->dev, "failed to enable ports: %d\n", status); 876 877 return status; 878 } 879 880 static int f81534a_ctrl_probe(struct usb_interface *intf, 881 const struct usb_device_id *id) 882 { 883 return f81534a_ctrl_enable_all_ports(intf, true); 884 } 885 886 static void f81534a_ctrl_disconnect(struct usb_interface *intf) 887 { 888 f81534a_ctrl_enable_all_ports(intf, false); 889 } 890 891 static int f81534a_ctrl_resume(struct usb_interface *intf) 892 { 893 return f81534a_ctrl_enable_all_ports(intf, true); 894 } 895 896 static int f81232_port_probe(struct usb_serial_port *port) 897 { 898 struct f81232_private *priv; 899 900 priv = devm_kzalloc(&port->dev, sizeof(*priv), GFP_KERNEL); 901 if (!priv) 902 return -ENOMEM; 903 904 mutex_init(&priv->lock); 905 INIT_WORK(&priv->interrupt_work, f81232_interrupt_work); 906 INIT_WORK(&priv->lsr_work, f81232_lsr_worker); 907 908 usb_set_serial_port_data(port, priv); 909 910 priv->port = port; 911 912 return 0; 913 } 914 915 static int f81534a_port_probe(struct usb_serial_port *port) 916 { 917 int status; 918 919 /* tri-state with pull-high, default RS232 Mode */ 920 status = f81232_set_register(port, F81534A_GPIO_REG, 921 F81534A_GPIO_MODE2_DIR); 922 if (status) 923 return status; 924 925 return f81232_port_probe(port); 926 } 927 928 static int f81232_suspend(struct usb_serial *serial, pm_message_t message) 929 { 930 struct usb_serial_port *port = serial->port[0]; 931 struct f81232_private *port_priv = usb_get_serial_port_data(port); 932 int i; 933 934 for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) 935 usb_kill_urb(port->read_urbs[i]); 936 937 usb_kill_urb(port->interrupt_in_urb); 938 939 if (port_priv) { 940 flush_work(&port_priv->interrupt_work); 941 flush_work(&port_priv->lsr_work); 942 } 943 944 return 0; 945 } 946 947 static int f81232_resume(struct usb_serial *serial) 948 { 949 struct usb_serial_port *port = serial->port[0]; 950 int result; 951 952 if (tty_port_initialized(&port->port)) { 953 result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO); 954 if (result) { 955 dev_err(&port->dev, "submit interrupt urb failed: %d\n", 956 result); 957 return result; 958 } 959 } 960 961 return usb_serial_generic_resume(serial); 962 } 963 964 static struct usb_serial_driver f81232_device = { 965 .driver = { 966 .owner = THIS_MODULE, 967 .name = "f81232", 968 }, 969 .id_table = f81232_id_table, 970 .num_ports = 1, 971 .bulk_in_size = 256, 972 .bulk_out_size = 256, 973 .open = f81232_open, 974 .close = f81232_close, 975 .dtr_rts = f81232_dtr_rts, 976 .carrier_raised = f81232_carrier_raised, 977 .get_serial = f81232_get_serial, 978 .break_ctl = f81232_break_ctl, 979 .set_termios = f81232_set_termios, 980 .tiocmget = f81232_tiocmget, 981 .tiocmset = f81232_tiocmset, 982 .tiocmiwait = usb_serial_generic_tiocmiwait, 983 .tx_empty = f81232_tx_empty, 984 .process_read_urb = f81232_process_read_urb, 985 .read_int_callback = f81232_read_int_callback, 986 .port_probe = f81232_port_probe, 987 .suspend = f81232_suspend, 988 .resume = f81232_resume, 989 }; 990 991 static struct usb_serial_driver f81534a_device = { 992 .driver = { 993 .owner = THIS_MODULE, 994 .name = "f81534a", 995 }, 996 .id_table = f81534a_id_table, 997 .num_ports = 1, 998 .open = f81534a_open, 999 .close = f81232_close, 1000 .dtr_rts = f81232_dtr_rts, 1001 .carrier_raised = f81232_carrier_raised, 1002 .get_serial = f81232_get_serial, 1003 .break_ctl = f81232_break_ctl, 1004 .set_termios = f81232_set_termios, 1005 .tiocmget = f81232_tiocmget, 1006 .tiocmset = f81232_tiocmset, 1007 .tiocmiwait = usb_serial_generic_tiocmiwait, 1008 .tx_empty = f81232_tx_empty, 1009 .process_read_urb = f81534a_process_read_urb, 1010 .read_int_callback = f81232_read_int_callback, 1011 .port_probe = f81534a_port_probe, 1012 .suspend = f81232_suspend, 1013 .resume = f81232_resume, 1014 }; 1015 1016 static struct usb_serial_driver * const serial_drivers[] = { 1017 &f81232_device, 1018 &f81534a_device, 1019 NULL, 1020 }; 1021 1022 static struct usb_driver f81534a_ctrl_driver = { 1023 .name = "f81534a_ctrl", 1024 .id_table = f81534a_ctrl_id_table, 1025 .probe = f81534a_ctrl_probe, 1026 .disconnect = f81534a_ctrl_disconnect, 1027 .resume = f81534a_ctrl_resume, 1028 }; 1029 1030 static int __init f81232_init(void) 1031 { 1032 int status; 1033 1034 status = usb_register_driver(&f81534a_ctrl_driver, THIS_MODULE, 1035 KBUILD_MODNAME); 1036 if (status) 1037 return status; 1038 1039 status = usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, 1040 combined_id_table); 1041 if (status) { 1042 usb_deregister(&f81534a_ctrl_driver); 1043 return status; 1044 } 1045 1046 return 0; 1047 } 1048 1049 static void __exit f81232_exit(void) 1050 { 1051 usb_serial_deregister_drivers(serial_drivers); 1052 usb_deregister(&f81534a_ctrl_driver); 1053 } 1054 1055 module_init(f81232_init); 1056 module_exit(f81232_exit); 1057 1058 MODULE_DESCRIPTION("Fintek F81232/532A/534A/535/536 USB to serial driver"); 1059 MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); 1060 MODULE_AUTHOR("Peter Hong <peter_hong@fintek.com.tw>"); 1061 MODULE_LICENSE("GPL v2"); 1062