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 42static const struct usb_device_id f81232_id_table[] = { 43 F81232_ID, 44 { } /* Terminating entry */ 45}; 46 47static const struct usb_device_id f81534a_id_table[] = { 48 F81534A_SERIES_ID, 49 { } /* Terminating entry */ 50}; 51 52static const struct usb_device_id f81534a_ctrl_id_table[] = { 53 F81534A_CTRL_ID, 54 { } /* Terminating entry */ 55}; 56 57static const struct usb_device_id combined_id_table[] = { 58 F81232_ID, 59 F81534A_SERIES_ID, 60 F81534A_CTRL_ID, 61 { } /* Terminating entry */ 62}; 63MODULE_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 116struct 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 127static u32 const baudrate_table[] = { 115200, 921600, 1152000, 1500000 }; 128static 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 131static int calc_baud_divisor(speed_t baudrate, speed_t clockrate) 132{ 133 return DIV_ROUND_CLOSEST(clockrate, baudrate); 134} 135 136static int f81232_get_register(struct usb_serial_port *port, u16 reg, u8 *val) 137{ 138 int status; 139 struct usb_device *dev = port->serial->dev; 140 141 status = usb_control_msg_recv(dev, 142 0, 143 F81232_REGISTER_REQUEST, 144 F81232_GET_REGISTER, 145 reg, 146 0, 147 val, 148 sizeof(*val), 149 USB_CTRL_GET_TIMEOUT, 150 GFP_KERNEL); 151 if (status) { 152 dev_err(&port->dev, "%s failed status: %d\n", __func__, status); 153 status = usb_translate_errors(status); 154 } 155 156 return status; 157} 158 159static int f81232_set_register(struct usb_serial_port *port, u16 reg, u8 val) 160{ 161 int status; 162 struct usb_device *dev = port->serial->dev; 163 164 status = usb_control_msg_send(dev, 165 0, 166 F81232_REGISTER_REQUEST, 167 F81232_SET_REGISTER, 168 reg, 169 0, 170 &val, 171 sizeof(val), 172 USB_CTRL_SET_TIMEOUT, 173 GFP_KERNEL); 174 if (status) { 175 dev_err(&port->dev, "%s failed status: %d\n", __func__, status); 176 status = usb_translate_errors(status); 177 } 178 179 return status; 180} 181 182static int f81232_set_mask_register(struct usb_serial_port *port, u16 reg, 183 u8 mask, u8 val) 184{ 185 int status; 186 u8 tmp; 187 188 status = f81232_get_register(port, reg, &tmp); 189 if (status) 190 return status; 191 192 tmp = (tmp & ~mask) | (val & mask); 193 194 return f81232_set_register(port, reg, tmp); 195} 196 197static void f81232_read_msr(struct usb_serial_port *port) 198{ 199 int status; 200 u8 current_msr; 201 struct tty_struct *tty; 202 struct f81232_private *priv = usb_get_serial_port_data(port); 203 204 mutex_lock(&priv->lock); 205 status = f81232_get_register(port, MODEM_STATUS_REGISTER, 206 ¤t_msr); 207 if (status) { 208 dev_err(&port->dev, "%s fail, status: %d\n", __func__, status); 209 mutex_unlock(&priv->lock); 210 return; 211 } 212 213 if (!(current_msr & UART_MSR_ANY_DELTA)) { 214 mutex_unlock(&priv->lock); 215 return; 216 } 217 218 priv->modem_status = current_msr; 219 220 if (current_msr & UART_MSR_DCTS) 221 port->icount.cts++; 222 if (current_msr & UART_MSR_DDSR) 223 port->icount.dsr++; 224 if (current_msr & UART_MSR_TERI) 225 port->icount.rng++; 226 if (current_msr & UART_MSR_DDCD) { 227 port->icount.dcd++; 228 tty = tty_port_tty_get(&port->port); 229 if (tty) { 230 usb_serial_handle_dcd_change(port, tty, 231 current_msr & UART_MSR_DCD); 232 233 tty_kref_put(tty); 234 } 235 } 236 237 wake_up_interruptible(&port->port.delta_msr_wait); 238 mutex_unlock(&priv->lock); 239} 240 241static int f81232_set_mctrl(struct usb_serial_port *port, 242 unsigned int set, unsigned int clear) 243{ 244 u8 val; 245 int status; 246 struct f81232_private *priv = usb_get_serial_port_data(port); 247 248 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) 249 return 0; /* no change */ 250 251 /* 'set' takes precedence over 'clear' */ 252 clear &= ~set; 253 254 /* force enable interrupt with OUT2 */ 255 mutex_lock(&priv->lock); 256 val = UART_MCR_OUT2 | priv->modem_control; 257 258 if (clear & TIOCM_DTR) 259 val &= ~UART_MCR_DTR; 260 261 if (clear & TIOCM_RTS) 262 val &= ~UART_MCR_RTS; 263 264 if (set & TIOCM_DTR) 265 val |= UART_MCR_DTR; 266 267 if (set & TIOCM_RTS) 268 val |= UART_MCR_RTS; 269 270 dev_dbg(&port->dev, "%s new:%02x old:%02x\n", __func__, 271 val, priv->modem_control); 272 273 status = f81232_set_register(port, MODEM_CONTROL_REGISTER, val); 274 if (status) { 275 dev_err(&port->dev, "%s set MCR status < 0\n", __func__); 276 mutex_unlock(&priv->lock); 277 return status; 278 } 279 280 priv->modem_control = val; 281 mutex_unlock(&priv->lock); 282 283 return 0; 284} 285 286static void f81232_update_line_status(struct usb_serial_port *port, 287 unsigned char *data, 288 size_t actual_length) 289{ 290 struct f81232_private *priv = usb_get_serial_port_data(port); 291 292 if (!actual_length) 293 return; 294 295 switch (data[0] & 0x07) { 296 case 0x00: /* msr change */ 297 dev_dbg(&port->dev, "IIR: MSR Change: %02x\n", data[0]); 298 schedule_work(&priv->interrupt_work); 299 break; 300 case 0x02: /* tx-empty */ 301 break; 302 case 0x04: /* rx data available */ 303 break; 304 case 0x06: /* lsr change */ 305 /* we can forget it. the LSR will read from bulk-in */ 306 dev_dbg(&port->dev, "IIR: LSR Change: %02x\n", data[0]); 307 break; 308 } 309} 310 311static void f81232_read_int_callback(struct urb *urb) 312{ 313 struct usb_serial_port *port = urb->context; 314 unsigned char *data = urb->transfer_buffer; 315 unsigned int actual_length = urb->actual_length; 316 int status = urb->status; 317 int retval; 318 319 switch (status) { 320 case 0: 321 /* success */ 322 break; 323 case -ECONNRESET: 324 case -ENOENT: 325 case -ESHUTDOWN: 326 /* this urb is terminated, clean up */ 327 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 328 __func__, status); 329 return; 330 default: 331 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 332 __func__, status); 333 goto exit; 334 } 335 336 usb_serial_debug_data(&port->dev, __func__, 337 urb->actual_length, urb->transfer_buffer); 338 339 f81232_update_line_status(port, data, actual_length); 340 341exit: 342 retval = usb_submit_urb(urb, GFP_ATOMIC); 343 if (retval) 344 dev_err(&urb->dev->dev, 345 "%s - usb_submit_urb failed with result %d\n", 346 __func__, retval); 347} 348 349static char f81232_handle_lsr(struct usb_serial_port *port, u8 lsr) 350{ 351 struct f81232_private *priv = usb_get_serial_port_data(port); 352 char tty_flag = TTY_NORMAL; 353 354 if (!(lsr & UART_LSR_BRK_ERROR_BITS)) 355 return tty_flag; 356 357 if (lsr & UART_LSR_BI) { 358 tty_flag = TTY_BREAK; 359 port->icount.brk++; 360 usb_serial_handle_break(port); 361 } else if (lsr & UART_LSR_PE) { 362 tty_flag = TTY_PARITY; 363 port->icount.parity++; 364 } else if (lsr & UART_LSR_FE) { 365 tty_flag = TTY_FRAME; 366 port->icount.frame++; 367 } 368 369 if (lsr & UART_LSR_OE) { 370 port->icount.overrun++; 371 schedule_work(&priv->lsr_work); 372 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 373 } 374 375 return tty_flag; 376} 377 378static void f81232_process_read_urb(struct urb *urb) 379{ 380 struct usb_serial_port *port = urb->context; 381 unsigned char *data = urb->transfer_buffer; 382 char tty_flag; 383 unsigned int i; 384 u8 lsr; 385 386 /* 387 * When opening the port we get a 1-byte packet with the current LSR, 388 * which we discard. 389 */ 390 if ((urb->actual_length < 2) || (urb->actual_length % 2)) 391 return; 392 393 /* bulk-in data: [LSR(1Byte)+DATA(1Byte)][LSR(1Byte)+DATA(1Byte)]... */ 394 395 for (i = 0; i < urb->actual_length; i += 2) { 396 lsr = data[i]; 397 tty_flag = f81232_handle_lsr(port, lsr); 398 399 if (port->sysrq) { 400 if (usb_serial_handle_sysrq_char(port, data[i + 1])) 401 continue; 402 } 403 404 tty_insert_flip_char(&port->port, data[i + 1], tty_flag); 405 } 406 407 tty_flip_buffer_push(&port->port); 408} 409 410static void f81534a_process_read_urb(struct urb *urb) 411{ 412 struct usb_serial_port *port = urb->context; 413 unsigned char *data = urb->transfer_buffer; 414 char tty_flag; 415 unsigned int i; 416 u8 lsr; 417 u8 len; 418 419 if (urb->actual_length < 3) { 420 dev_err(&port->dev, "short message received: %d\n", 421 urb->actual_length); 422 return; 423 } 424 425 len = data[0]; 426 if (len != urb->actual_length) { 427 dev_err(&port->dev, "malformed message received: %d (%d)\n", 428 urb->actual_length, len); 429 return; 430 } 431 432 /* bulk-in data: [LEN][Data.....][LSR] */ 433 lsr = data[len - 1]; 434 tty_flag = f81232_handle_lsr(port, lsr); 435 436 if (port->sysrq) { 437 for (i = 1; i < len - 1; ++i) { 438 if (!usb_serial_handle_sysrq_char(port, data[i])) { 439 tty_insert_flip_char(&port->port, data[i], 440 tty_flag); 441 } 442 } 443 } else { 444 tty_insert_flip_string_fixed_flag(&port->port, &data[1], 445 tty_flag, len - 2); 446 } 447 448 tty_flip_buffer_push(&port->port); 449} 450 451static int f81232_break_ctl(struct tty_struct *tty, int break_state) 452{ 453 struct usb_serial_port *port = tty->driver_data; 454 struct f81232_private *priv = usb_get_serial_port_data(port); 455 int status; 456 457 mutex_lock(&priv->lock); 458 459 if (break_state) 460 priv->shadow_lcr |= UART_LCR_SBC; 461 else 462 priv->shadow_lcr &= ~UART_LCR_SBC; 463 464 status = f81232_set_register(port, LINE_CONTROL_REGISTER, 465 priv->shadow_lcr); 466 if (status) 467 dev_err(&port->dev, "set break failed: %d\n", status); 468 469 mutex_unlock(&priv->lock); 470 471 return status; 472} 473 474static int f81232_find_clk(speed_t baudrate) 475{ 476 int idx; 477 478 for (idx = 0; idx < ARRAY_SIZE(baudrate_table); ++idx) { 479 if (baudrate <= baudrate_table[idx] && 480 baudrate_table[idx] % baudrate == 0) 481 return idx; 482 } 483 484 return -EINVAL; 485} 486 487static void f81232_set_baudrate(struct tty_struct *tty, 488 struct usb_serial_port *port, speed_t baudrate, 489 speed_t old_baudrate) 490{ 491 struct f81232_private *priv = usb_get_serial_port_data(port); 492 u8 lcr; 493 int divisor; 494 int status = 0; 495 int i; 496 int idx; 497 speed_t baud_list[] = { baudrate, old_baudrate, F81232_DEF_BAUDRATE }; 498 499 for (i = 0; i < ARRAY_SIZE(baud_list); ++i) { 500 baudrate = baud_list[i]; 501 if (baudrate == 0) { 502 tty_encode_baud_rate(tty, 0, 0); 503 return; 504 } 505 506 idx = f81232_find_clk(baudrate); 507 if (idx >= 0) { 508 tty_encode_baud_rate(tty, baudrate, baudrate); 509 break; 510 } 511 } 512 513 if (idx < 0) 514 return; 515 516 priv->baud_base = baudrate_table[idx]; 517 divisor = calc_baud_divisor(baudrate, priv->baud_base); 518 519 status = f81232_set_mask_register(port, F81232_CLK_REGISTER, 520 F81232_CLK_MASK, clock_table[idx]); 521 if (status) { 522 dev_err(&port->dev, "%s failed to set CLK_REG: %d\n", 523 __func__, status); 524 return; 525 } 526 527 status = f81232_get_register(port, LINE_CONTROL_REGISTER, 528 &lcr); /* get LCR */ 529 if (status) { 530 dev_err(&port->dev, "%s failed to get LCR: %d\n", 531 __func__, status); 532 return; 533 } 534 535 status = f81232_set_register(port, LINE_CONTROL_REGISTER, 536 lcr | UART_LCR_DLAB); /* Enable DLAB */ 537 if (status) { 538 dev_err(&port->dev, "%s failed to set DLAB: %d\n", 539 __func__, status); 540 return; 541 } 542 543 status = f81232_set_register(port, RECEIVE_BUFFER_REGISTER, 544 divisor & 0x00ff); /* low */ 545 if (status) { 546 dev_err(&port->dev, "%s failed to set baudrate MSB: %d\n", 547 __func__, status); 548 goto reapply_lcr; 549 } 550 551 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, 552 (divisor & 0xff00) >> 8); /* high */ 553 if (status) { 554 dev_err(&port->dev, "%s failed to set baudrate LSB: %d\n", 555 __func__, status); 556 } 557 558reapply_lcr: 559 status = f81232_set_register(port, LINE_CONTROL_REGISTER, 560 lcr & ~UART_LCR_DLAB); 561 if (status) { 562 dev_err(&port->dev, "%s failed to set DLAB: %d\n", 563 __func__, status); 564 } 565} 566 567static int f81232_port_enable(struct usb_serial_port *port) 568{ 569 u8 val; 570 int status; 571 572 /* fifo on, trigger8, clear TX/RX*/ 573 val = UART_FCR_TRIGGER_8 | UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | 574 UART_FCR_CLEAR_XMIT; 575 576 status = f81232_set_register(port, FIFO_CONTROL_REGISTER, val); 577 if (status) { 578 dev_err(&port->dev, "%s failed to set FCR: %d\n", 579 __func__, status); 580 return status; 581 } 582 583 /* MSR Interrupt only, LSR will read from Bulk-in odd byte */ 584 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, 585 UART_IER_MSI); 586 if (status) { 587 dev_err(&port->dev, "%s failed to set IER: %d\n", 588 __func__, status); 589 return status; 590 } 591 592 return 0; 593} 594 595static int f81232_port_disable(struct usb_serial_port *port) 596{ 597 int status; 598 599 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, 0); 600 if (status) { 601 dev_err(&port->dev, "%s failed to set IER: %d\n", 602 __func__, status); 603 return status; 604 } 605 606 return 0; 607} 608 609static void f81232_set_termios(struct tty_struct *tty, 610 struct usb_serial_port *port, 611 const struct ktermios *old_termios) 612{ 613 struct f81232_private *priv = usb_get_serial_port_data(port); 614 u8 new_lcr = 0; 615 int status = 0; 616 speed_t baudrate; 617 speed_t old_baud; 618 619 /* Don't change anything if nothing has changed */ 620 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) 621 return; 622 623 if (C_BAUD(tty) == B0) 624 f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS); 625 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 626 f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0); 627 628 baudrate = tty_get_baud_rate(tty); 629 if (baudrate > 0) { 630 if (old_termios) 631 old_baud = tty_termios_baud_rate(old_termios); 632 else 633 old_baud = F81232_DEF_BAUDRATE; 634 635 f81232_set_baudrate(tty, port, baudrate, old_baud); 636 } 637 638 if (C_PARENB(tty)) { 639 new_lcr |= UART_LCR_PARITY; 640 641 if (!C_PARODD(tty)) 642 new_lcr |= UART_LCR_EPAR; 643 644 if (C_CMSPAR(tty)) 645 new_lcr |= UART_LCR_SPAR; 646 } 647 648 if (C_CSTOPB(tty)) 649 new_lcr |= UART_LCR_STOP; 650 651 new_lcr |= UART_LCR_WLEN(tty_get_char_size(tty->termios.c_cflag)); 652 653 mutex_lock(&priv->lock); 654 655 new_lcr |= (priv->shadow_lcr & UART_LCR_SBC); 656 status = f81232_set_register(port, LINE_CONTROL_REGISTER, new_lcr); 657 if (status) { 658 dev_err(&port->dev, "%s failed to set LCR: %d\n", 659 __func__, status); 660 } 661 662 priv->shadow_lcr = new_lcr; 663 664 mutex_unlock(&priv->lock); 665} 666 667static int f81232_tiocmget(struct tty_struct *tty) 668{ 669 int r; 670 struct usb_serial_port *port = tty->driver_data; 671 struct f81232_private *port_priv = usb_get_serial_port_data(port); 672 u8 mcr, msr; 673 674 /* force get current MSR changed state */ 675 f81232_read_msr(port); 676 677 mutex_lock(&port_priv->lock); 678 mcr = port_priv->modem_control; 679 msr = port_priv->modem_status; 680 mutex_unlock(&port_priv->lock); 681 682 r = (mcr & UART_MCR_DTR ? TIOCM_DTR : 0) | 683 (mcr & UART_MCR_RTS ? TIOCM_RTS : 0) | 684 (msr & UART_MSR_CTS ? TIOCM_CTS : 0) | 685 (msr & UART_MSR_DCD ? TIOCM_CAR : 0) | 686 (msr & UART_MSR_RI ? TIOCM_RI : 0) | 687 (msr & UART_MSR_DSR ? TIOCM_DSR : 0); 688 689 return r; 690} 691 692static int f81232_tiocmset(struct tty_struct *tty, 693 unsigned int set, unsigned int clear) 694{ 695 struct usb_serial_port *port = tty->driver_data; 696 697 return f81232_set_mctrl(port, set, clear); 698} 699 700static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port) 701{ 702 int result; 703 704 result = f81232_port_enable(port); 705 if (result) 706 return result; 707 708 /* Setup termios */ 709 if (tty) 710 f81232_set_termios(tty, port, NULL); 711 712 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 713 if (result) { 714 dev_err(&port->dev, "%s - failed submitting interrupt urb," 715 " error %d\n", __func__, result); 716 return result; 717 } 718 719 result = usb_serial_generic_open(tty, port); 720 if (result) { 721 usb_kill_urb(port->interrupt_in_urb); 722 return result; 723 } 724 725 return 0; 726} 727 728static int f81534a_open(struct tty_struct *tty, struct usb_serial_port *port) 729{ 730 int status; 731 u8 mask; 732 u8 val; 733 734 val = F81534A_TRIGGER_MULTIPLE_4X | F81534A_FIFO_128BYTE; 735 mask = F81534A_TRIGGER_MASK | F81534A_FIFO_128BYTE; 736 737 status = f81232_set_mask_register(port, F81534A_MODE_REG, mask, val); 738 if (status) { 739 dev_err(&port->dev, "failed to set MODE_REG: %d\n", status); 740 return status; 741 } 742 743 return f81232_open(tty, port); 744} 745 746static void f81232_close(struct usb_serial_port *port) 747{ 748 struct f81232_private *port_priv = usb_get_serial_port_data(port); 749 750 f81232_port_disable(port); 751 usb_serial_generic_close(port); 752 usb_kill_urb(port->interrupt_in_urb); 753 flush_work(&port_priv->interrupt_work); 754 flush_work(&port_priv->lsr_work); 755} 756 757static void f81232_dtr_rts(struct usb_serial_port *port, int on) 758{ 759 if (on) 760 f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0); 761 else 762 f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS); 763} 764 765static bool f81232_tx_empty(struct usb_serial_port *port) 766{ 767 int status; 768 u8 tmp; 769 770 status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp); 771 if (!status) { 772 if ((tmp & UART_LSR_TEMT) != UART_LSR_TEMT) 773 return false; 774 } 775 776 return true; 777} 778 779static int f81232_carrier_raised(struct usb_serial_port *port) 780{ 781 u8 msr; 782 struct f81232_private *priv = usb_get_serial_port_data(port); 783 784 mutex_lock(&priv->lock); 785 msr = priv->modem_status; 786 mutex_unlock(&priv->lock); 787 788 if (msr & UART_MSR_DCD) 789 return 1; 790 return 0; 791} 792 793static void f81232_get_serial(struct tty_struct *tty, struct serial_struct *ss) 794{ 795 struct usb_serial_port *port = tty->driver_data; 796 struct f81232_private *priv = usb_get_serial_port_data(port); 797 798 ss->baud_base = priv->baud_base; 799} 800 801static void f81232_interrupt_work(struct work_struct *work) 802{ 803 struct f81232_private *priv = 804 container_of(work, struct f81232_private, interrupt_work); 805 806 f81232_read_msr(priv->port); 807} 808 809static void f81232_lsr_worker(struct work_struct *work) 810{ 811 struct f81232_private *priv; 812 struct usb_serial_port *port; 813 int status; 814 u8 tmp; 815 816 priv = container_of(work, struct f81232_private, lsr_work); 817 port = priv->port; 818 819 status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp); 820 if (status) 821 dev_warn(&port->dev, "read LSR failed: %d\n", status); 822} 823 824static int f81534a_ctrl_set_register(struct usb_interface *intf, u16 reg, 825 u16 size, void *val) 826{ 827 struct usb_device *dev = interface_to_usbdev(intf); 828 int retry = F81534A_ACCESS_REG_RETRY; 829 int status; 830 831 while (retry--) { 832 status = usb_control_msg_send(dev, 833 0, 834 F81232_REGISTER_REQUEST, 835 F81232_SET_REGISTER, 836 reg, 837 0, 838 val, 839 size, 840 USB_CTRL_SET_TIMEOUT, 841 GFP_KERNEL); 842 if (status) { 843 status = usb_translate_errors(status); 844 if (status == -EIO) 845 continue; 846 } 847 848 break; 849 } 850 851 if (status) { 852 dev_err(&intf->dev, "failed to set register 0x%x: %d\n", 853 reg, status); 854 } 855 856 return status; 857} 858 859static int f81534a_ctrl_enable_all_ports(struct usb_interface *intf, bool en) 860{ 861 unsigned char enable[2] = {0}; 862 int status; 863 864 /* 865 * Enable all available serial ports, define as following: 866 * bit 15 : Reset behavior (when HUB got soft reset) 867 * 0: maintain all serial port enabled state. 868 * 1: disable all serial port. 869 * bit 0~11 : Serial port enable bit. 870 */ 871 if (en) { 872 enable[0] = 0xff; 873 enable[1] = 0x8f; 874 } 875 876 status = f81534a_ctrl_set_register(intf, F81534A_CTRL_CMD_ENABLE_PORT, 877 sizeof(enable), enable); 878 if (status) 879 dev_err(&intf->dev, "failed to enable ports: %d\n", status); 880 881 return status; 882} 883 884static int f81534a_ctrl_probe(struct usb_interface *intf, 885 const struct usb_device_id *id) 886{ 887 return f81534a_ctrl_enable_all_ports(intf, true); 888} 889 890static void f81534a_ctrl_disconnect(struct usb_interface *intf) 891{ 892 f81534a_ctrl_enable_all_ports(intf, false); 893} 894 895static int f81534a_ctrl_resume(struct usb_interface *intf) 896{ 897 return f81534a_ctrl_enable_all_ports(intf, true); 898} 899 900static int f81232_port_probe(struct usb_serial_port *port) 901{ 902 struct f81232_private *priv; 903 904 priv = devm_kzalloc(&port->dev, sizeof(*priv), GFP_KERNEL); 905 if (!priv) 906 return -ENOMEM; 907 908 mutex_init(&priv->lock); 909 INIT_WORK(&priv->interrupt_work, f81232_interrupt_work); 910 INIT_WORK(&priv->lsr_work, f81232_lsr_worker); 911 912 usb_set_serial_port_data(port, priv); 913 914 priv->port = port; 915 916 return 0; 917} 918 919static int f81534a_port_probe(struct usb_serial_port *port) 920{ 921 int status; 922 923 /* tri-state with pull-high, default RS232 Mode */ 924 status = f81232_set_register(port, F81534A_GPIO_REG, 925 F81534A_GPIO_MODE2_DIR); 926 if (status) 927 return status; 928 929 return f81232_port_probe(port); 930} 931 932static int f81232_suspend(struct usb_serial *serial, pm_message_t message) 933{ 934 struct usb_serial_port *port = serial->port[0]; 935 struct f81232_private *port_priv = usb_get_serial_port_data(port); 936 int i; 937 938 for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) 939 usb_kill_urb(port->read_urbs[i]); 940 941 usb_kill_urb(port->interrupt_in_urb); 942 943 if (port_priv) { 944 flush_work(&port_priv->interrupt_work); 945 flush_work(&port_priv->lsr_work); 946 } 947 948 return 0; 949} 950 951static int f81232_resume(struct usb_serial *serial) 952{ 953 struct usb_serial_port *port = serial->port[0]; 954 int result; 955 956 if (tty_port_initialized(&port->port)) { 957 result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO); 958 if (result) { 959 dev_err(&port->dev, "submit interrupt urb failed: %d\n", 960 result); 961 return result; 962 } 963 } 964 965 return usb_serial_generic_resume(serial); 966} 967 968static struct usb_serial_driver f81232_device = { 969 .driver = { 970 .owner = THIS_MODULE, 971 .name = "f81232", 972 }, 973 .id_table = f81232_id_table, 974 .num_ports = 1, 975 .bulk_in_size = 256, 976 .bulk_out_size = 256, 977 .open = f81232_open, 978 .close = f81232_close, 979 .dtr_rts = f81232_dtr_rts, 980 .carrier_raised = f81232_carrier_raised, 981 .get_serial = f81232_get_serial, 982 .break_ctl = f81232_break_ctl, 983 .set_termios = f81232_set_termios, 984 .tiocmget = f81232_tiocmget, 985 .tiocmset = f81232_tiocmset, 986 .tiocmiwait = usb_serial_generic_tiocmiwait, 987 .tx_empty = f81232_tx_empty, 988 .process_read_urb = f81232_process_read_urb, 989 .read_int_callback = f81232_read_int_callback, 990 .port_probe = f81232_port_probe, 991 .suspend = f81232_suspend, 992 .resume = f81232_resume, 993}; 994 995static struct usb_serial_driver f81534a_device = { 996 .driver = { 997 .owner = THIS_MODULE, 998 .name = "f81534a", 999 }, 1000 .id_table = f81534a_id_table, 1001 .num_ports = 1, 1002 .open = f81534a_open, 1003 .close = f81232_close, 1004 .dtr_rts = f81232_dtr_rts, 1005 .carrier_raised = f81232_carrier_raised, 1006 .get_serial = f81232_get_serial, 1007 .break_ctl = f81232_break_ctl, 1008 .set_termios = f81232_set_termios, 1009 .tiocmget = f81232_tiocmget, 1010 .tiocmset = f81232_tiocmset, 1011 .tiocmiwait = usb_serial_generic_tiocmiwait, 1012 .tx_empty = f81232_tx_empty, 1013 .process_read_urb = f81534a_process_read_urb, 1014 .read_int_callback = f81232_read_int_callback, 1015 .port_probe = f81534a_port_probe, 1016 .suspend = f81232_suspend, 1017 .resume = f81232_resume, 1018}; 1019 1020static struct usb_serial_driver * const serial_drivers[] = { 1021 &f81232_device, 1022 &f81534a_device, 1023 NULL, 1024}; 1025 1026static struct usb_driver f81534a_ctrl_driver = { 1027 .name = "f81534a_ctrl", 1028 .id_table = f81534a_ctrl_id_table, 1029 .probe = f81534a_ctrl_probe, 1030 .disconnect = f81534a_ctrl_disconnect, 1031 .resume = f81534a_ctrl_resume, 1032}; 1033 1034static int __init f81232_init(void) 1035{ 1036 int status; 1037 1038 status = usb_register_driver(&f81534a_ctrl_driver, THIS_MODULE, 1039 KBUILD_MODNAME); 1040 if (status) 1041 return status; 1042 1043 status = usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, 1044 combined_id_table); 1045 if (status) { 1046 usb_deregister(&f81534a_ctrl_driver); 1047 return status; 1048 } 1049 1050 return 0; 1051} 1052 1053static void __exit f81232_exit(void) 1054{ 1055 usb_serial_deregister_drivers(serial_drivers); 1056 usb_deregister(&f81534a_ctrl_driver); 1057} 1058 1059module_init(f81232_init); 1060module_exit(f81232_exit); 1061 1062MODULE_DESCRIPTION("Fintek F81232/532A/534A/535/536 USB to serial driver"); 1063MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); 1064MODULE_AUTHOR("Peter Hong <peter_hong@fintek.com.tw>"); 1065MODULE_LICENSE("GPL v2"); 1066