drivers/usb/serial/spcp8x5.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * spcp8x5 USB to serial adaptor driver
   4  *
   5  * Copyright (C) 2010-2013 Johan Hovold (jhovold@gmail.com)
   6  * Copyright (C) 2006 Linxb (xubin.lin@worldplus.com.cn)
   7  * Copyright (C) 2006 S1 Corp.
   8  *
   9  * Original driver for 2.6.10 pl2303 driver by
  10  *   Greg Kroah-Hartman (greg@kroah.com)
  11  * Changes for 2.6.20 by Harald Klein <hari@vt100.at>
  12  */
  13 #include <linux/kernel.h>
  14 #include <linux/errno.h>
  15 #include <linux/slab.h>
  16 #include <linux/tty.h>
  17 #include <linux/tty_driver.h>
  18 #include <linux/tty_flip.h>
  19 #include <linux/module.h>
  20 #include <linux/spinlock.h>
  21 #include <linux/usb.h>
  22 #include <linux/usb/serial.h>
  23
  24 #define DRIVER_DESC     "SPCP8x5 USB to serial adaptor driver"
  25
  26 #define SPCP825_QUIRK_NO_UART_STATUS    0x01
  27 #define SPCP825_QUIRK_NO_WORK_MODE      0x02
  28
  29 #define SPCP8x5_007_VID         0x04FC
  30 #define SPCP8x5_007_PID         0x0201
  31 #define SPCP8x5_008_VID         0x04fc
  32 #define SPCP8x5_008_PID         0x0235
  33 #define SPCP8x5_PHILIPS_VID     0x0471
  34 #define SPCP8x5_PHILIPS_PID     0x081e
  35 #define SPCP8x5_INTERMATIC_VID  0x04FC
  36 #define SPCP8x5_INTERMATIC_PID  0x0204
  37 #define SPCP8x5_835_VID         0x04fc
  38 #define SPCP8x5_835_PID         0x0231
  39
  40 static const struct usb_device_id id_table[] = {
  41         { USB_DEVICE(SPCP8x5_PHILIPS_VID , SPCP8x5_PHILIPS_PID)},
  42         { USB_DEVICE(SPCP8x5_INTERMATIC_VID, SPCP8x5_INTERMATIC_PID)},
  43         { USB_DEVICE(SPCP8x5_835_VID, SPCP8x5_835_PID)},
  44         { USB_DEVICE(SPCP8x5_008_VID, SPCP8x5_008_PID)},
  45         { USB_DEVICE(SPCP8x5_007_VID, SPCP8x5_007_PID),
  46           .driver_info = SPCP825_QUIRK_NO_UART_STATUS |
  47                                 SPCP825_QUIRK_NO_WORK_MODE },
  48         { }                                     /* Terminating entry */
  49 };
  50 MODULE_DEVICE_TABLE(usb, id_table);
  51
  52 struct spcp8x5_usb_ctrl_arg {
  53         u8      type;
  54         u8      cmd;
  55         u8      cmd_type;
  56         u16     value;
  57         u16     index;
  58         u16     length;
  59 };
  60
  61
  62 /* spcp8x5 spec register define */
  63 #define MCR_CONTROL_LINE_RTS            0x02
  64 #define MCR_CONTROL_LINE_DTR            0x01
  65 #define MCR_DTR                         0x01
  66 #define MCR_RTS                         0x02
  67
  68 #define MSR_STATUS_LINE_DCD             0x80
  69 #define MSR_STATUS_LINE_RI              0x40
  70 #define MSR_STATUS_LINE_DSR             0x20
  71 #define MSR_STATUS_LINE_CTS             0x10
  72
  73 /* verdor command here , we should define myself */
  74 #define SET_DEFAULT                     0x40
  75 #define SET_DEFAULT_TYPE                0x20
  76
  77 #define SET_UART_FORMAT                 0x40
  78 #define SET_UART_FORMAT_TYPE            0x21
  79 #define SET_UART_FORMAT_SIZE_5          0x00
  80 #define SET_UART_FORMAT_SIZE_6          0x01
  81 #define SET_UART_FORMAT_SIZE_7          0x02
  82 #define SET_UART_FORMAT_SIZE_8          0x03
  83 #define SET_UART_FORMAT_STOP_1          0x00
  84 #define SET_UART_FORMAT_STOP_2          0x04
  85 #define SET_UART_FORMAT_PAR_NONE        0x00
  86 #define SET_UART_FORMAT_PAR_ODD         0x10
  87 #define SET_UART_FORMAT_PAR_EVEN        0x30
  88 #define SET_UART_FORMAT_PAR_MASK        0xD0
  89 #define SET_UART_FORMAT_PAR_SPACE       0x90
  90
  91 #define GET_UART_STATUS_TYPE            0xc0
  92 #define GET_UART_STATUS                 0x22
  93 #define GET_UART_STATUS_MSR             0x06
  94
  95 #define SET_UART_STATUS                 0x40
  96 #define SET_UART_STATUS_TYPE            0x23
  97 #define SET_UART_STATUS_MCR             0x0004
  98 #define SET_UART_STATUS_MCR_DTR         0x01
  99 #define SET_UART_STATUS_MCR_RTS         0x02
 100 #define SET_UART_STATUS_MCR_LOOP        0x10
 101
 102 #define SET_WORKING_MODE                0x40
 103 #define SET_WORKING_MODE_TYPE           0x24
 104 #define SET_WORKING_MODE_U2C            0x00
 105 #define SET_WORKING_MODE_RS485          0x01
 106 #define SET_WORKING_MODE_PDMA           0x02
 107 #define SET_WORKING_MODE_SPP            0x03
 108
 109 #define SET_FLOWCTL_CHAR                0x40
 110 #define SET_FLOWCTL_CHAR_TYPE           0x25
 111
 112 #define GET_VERSION                     0xc0
 113 #define GET_VERSION_TYPE                0x26
 114
 115 #define SET_REGISTER                    0x40
 116 #define SET_REGISTER_TYPE               0x27
 117
 118 #define GET_REGISTER                    0xc0
 119 #define GET_REGISTER_TYPE               0x28
 120
 121 #define SET_RAM                         0x40
 122 #define SET_RAM_TYPE                    0x31
 123
 124 #define GET_RAM                         0xc0
 125 #define GET_RAM_TYPE                    0x32
 126
 127 /* how come ??? */
 128 #define UART_STATE                      0x08
 129 #define UART_STATE_TRANSIENT_MASK       0x75
 130 #define UART_DCD                        0x01
 131 #define UART_DSR                        0x02
 132 #define UART_BREAK_ERROR                0x04
 133 #define UART_RING                       0x08
 134 #define UART_FRAME_ERROR                0x10
 135 #define UART_PARITY_ERROR               0x20
 136 #define UART_OVERRUN_ERROR              0x40
 137 #define UART_CTS                        0x80
 138
 139 struct spcp8x5_private {
 140         unsigned                quirks;
 141         spinlock_t              lock;
 142         u8                      line_control;
 143 };
 144
 145 static int spcp8x5_probe(struct usb_serial *serial,
 146                                                 const struct usb_device_id *id)
 147 {
 148         usb_set_serial_data(serial, (void *)id);
 149
 150         return 0;
 151 }
 152
 153 static int spcp8x5_port_probe(struct usb_serial_port *port)
 154 {
 155         const struct usb_device_id *id = usb_get_serial_data(port->serial);
 156         struct spcp8x5_private *priv;
 157
 158         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 159         if (!priv)
 160                 return -ENOMEM;
 161
 162         spin_lock_init(&priv->lock);
 163         priv->quirks = id->driver_info;
 164
 165         usb_set_serial_port_data(port, priv);
 166
 167         port->port.drain_delay = 256;
 168
 169         return 0;
 170 }
 171
 172 static int spcp8x5_port_remove(struct usb_serial_port *port)
 173 {
 174         struct spcp8x5_private *priv;
 175
 176         priv = usb_get_serial_port_data(port);
 177         kfree(priv);
 178
 179         return 0;
 180 }
 181
 182 static int spcp8x5_set_ctrl_line(struct usb_serial_port *port, u8 mcr)
 183 {
 184         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 185         struct usb_device *dev = port->serial->dev;
 186         int retval;
 187
 188         if (priv->quirks & SPCP825_QUIRK_NO_UART_STATUS)
 189                 return -EPERM;
 190
 191         retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 192                                  SET_UART_STATUS_TYPE, SET_UART_STATUS,
 193                                  mcr, 0x04, NULL, 0, 100);
 194         if (retval != 0) {
 195                 dev_err(&port->dev, "failed to set control lines: %d\n",
 196                                                                 retval);
 197         }
 198         return retval;
 199 }
 200
 201 static int spcp8x5_get_msr(struct usb_serial_port *port, u8 *status)
 202 {
 203         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 204         struct usb_device *dev = port->serial->dev;
 205         u8 *buf;
 206         int ret;
 207
 208         if (priv->quirks & SPCP825_QUIRK_NO_UART_STATUS)
 209                 return -EPERM;
 210
 211         buf = kzalloc(1, GFP_KERNEL);
 212         if (!buf)
 213                 return -ENOMEM;
 214
 215         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 216                               GET_UART_STATUS, GET_UART_STATUS_TYPE,
 217                               0, GET_UART_STATUS_MSR, buf, 1, 100);
 218         if (ret < 1) {
 219                 dev_err(&port->dev, "failed to get modem status: %d\n", ret);
 220                 if (ret >= 0)
 221                         ret = -EIO;
 222                 goto out;
 223         }
 224
 225         dev_dbg(&port->dev, "0xc0:0x22:0:6  %d - 0x02%x\n", ret, *buf);
 226         *status = *buf;
 227         ret = 0;
 228 out:
 229         kfree(buf);
 230
 231         return ret;
 232 }
 233
 234 static void spcp8x5_set_work_mode(struct usb_serial_port *port, u16 value,
 235                                                                  u16 index)
 236 {
 237         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 238         struct usb_device *dev = port->serial->dev;
 239         int ret;
 240
 241         if (priv->quirks & SPCP825_QUIRK_NO_WORK_MODE)
 242                 return;
 243
 244         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 245                               SET_WORKING_MODE_TYPE, SET_WORKING_MODE,
 246                               value, index, NULL, 0, 100);
 247         dev_dbg(&port->dev, "value = %#x , index = %#x\n", value, index);
 248         if (ret < 0)
 249                 dev_err(&port->dev, "failed to set work mode: %d\n", ret);
 250 }
 251
 252 static int spcp8x5_carrier_raised(struct usb_serial_port *port)
 253 {
 254         u8 msr;
 255         int ret;
 256
 257         ret = spcp8x5_get_msr(port, &msr);
 258         if (ret || msr & MSR_STATUS_LINE_DCD)
 259                 return 1;
 260
 261         return 0;
 262 }
 263
 264 static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on)
 265 {
 266         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 267         unsigned long flags;
 268         u8 control;
 269
 270         spin_lock_irqsave(&priv->lock, flags);
 271         if (on)
 272                 priv->line_control = MCR_CONTROL_LINE_DTR
 273                                                 | MCR_CONTROL_LINE_RTS;
 274         else
 275                 priv->line_control &= ~ (MCR_CONTROL_LINE_DTR
 276                                                 | MCR_CONTROL_LINE_RTS);
 277         control = priv->line_control;
 278         spin_unlock_irqrestore(&priv->lock, flags);
 279         spcp8x5_set_ctrl_line(port, control);
 280 }
 281
 282 static void spcp8x5_init_termios(struct tty_struct *tty)
 283 {
 284         tty_encode_baud_rate(tty, 115200, 115200);
 285 }
 286
 287 static void spcp8x5_set_termios(struct tty_struct *tty,
 288                 struct usb_serial_port *port, struct ktermios *old_termios)
 289 {
 290         struct usb_serial *serial = port->serial;
 291         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 292         unsigned long flags;
 293         unsigned int cflag = tty->termios.c_cflag;
 294         unsigned short uartdata;
 295         unsigned char buf[2] = {0, 0};
 296         int baud;
 297         int i;
 298         u8 control;
 299
 300         /* check that they really want us to change something */
 301         if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
 302                 return;
 303
 304         /* set DTR/RTS active */
 305         spin_lock_irqsave(&priv->lock, flags);
 306         control = priv->line_control;
 307         if (old_termios && (old_termios->c_cflag & CBAUD) == B0) {
 308                 priv->line_control |= MCR_DTR;
 309                 if (!(old_termios->c_cflag & CRTSCTS))
 310                         priv->line_control |= MCR_RTS;
 311         }
 312         if (control != priv->line_control) {
 313                 control = priv->line_control;
 314                 spin_unlock_irqrestore(&priv->lock, flags);
 315                 spcp8x5_set_ctrl_line(port, control);
 316         } else {
 317                 spin_unlock_irqrestore(&priv->lock, flags);
 318         }
 319
 320         /* Set Baud Rate */
 321         baud = tty_get_baud_rate(tty);
 322         switch (baud) {
 323         case 300:       buf[0] = 0x00;  break;
 324         case 600:       buf[0] = 0x01;  break;
 325         case 1200:      buf[0] = 0x02;  break;
 326         case 2400:      buf[0] = 0x03;  break;
 327         case 4800:      buf[0] = 0x04;  break;
 328         case 9600:      buf[0] = 0x05;  break;
 329         case 19200:     buf[0] = 0x07;  break;
 330         case 38400:     buf[0] = 0x09;  break;
 331         case 57600:     buf[0] = 0x0a;  break;
 332         case 115200:    buf[0] = 0x0b;  break;
 333         case 230400:    buf[0] = 0x0c;  break;
 334         case 460800:    buf[0] = 0x0d;  break;
 335         case 921600:    buf[0] = 0x0e;  break;
 336 /*      case 1200000:   buf[0] = 0x0f;  break; */
 337 /*      case 2400000:   buf[0] = 0x10;  break; */
 338         case 3000000:   buf[0] = 0x11;  break;
 339 /*      case 6000000:   buf[0] = 0x12;  break; */
 340         case 0:
 341         case 1000000:
 342                         buf[0] = 0x0b;  break;
 343         default:
 344                 dev_err(&port->dev, "unsupported baudrate, using 9600\n");
 345         }
 346
 347         /* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */
 348         switch (cflag & CSIZE) {
 349         case CS5:
 350                 buf[1] |= SET_UART_FORMAT_SIZE_5;
 351                 break;
 352         case CS6:
 353                 buf[1] |= SET_UART_FORMAT_SIZE_6;
 354                 break;
 355         case CS7:
 356                 buf[1] |= SET_UART_FORMAT_SIZE_7;
 357                 break;
 358         default:
 359         case CS8:
 360                 buf[1] |= SET_UART_FORMAT_SIZE_8;
 361                 break;
 362         }
 363
 364         /* Set Stop bit2 : 0:1bit 1:2bit */
 365         buf[1] |= (cflag & CSTOPB) ? SET_UART_FORMAT_STOP_2 :
 366                                      SET_UART_FORMAT_STOP_1;
 367
 368         /* Set Parity bit3-4 01:Odd 11:Even */
 369         if (cflag & PARENB) {
 370                 buf[1] |= (cflag & PARODD) ?
 371                 SET_UART_FORMAT_PAR_ODD : SET_UART_FORMAT_PAR_EVEN ;
 372         } else {
 373                 buf[1] |= SET_UART_FORMAT_PAR_NONE;
 374         }
 375         uartdata = buf[0] | buf[1]<<8;
 376
 377         i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 378                             SET_UART_FORMAT_TYPE, SET_UART_FORMAT,
 379                             uartdata, 0, NULL, 0, 100);
 380         if (i < 0)
 381                 dev_err(&port->dev, "Set UART format %#x failed (error = %d)\n",
 382                         uartdata, i);
 383         dev_dbg(&port->dev, "0x21:0x40:0:0  %d\n", i);
 384
 385         if (cflag & CRTSCTS) {
 386                 /* enable hardware flow control */
 387                 spcp8x5_set_work_mode(port, 0x000a, SET_WORKING_MODE_U2C);
 388         }
 389 }
 390
 391 static int spcp8x5_open(struct tty_struct *tty, struct usb_serial_port *port)
 392 {
 393         struct usb_serial *serial = port->serial;
 394         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 395         int ret;
 396
 397         usb_clear_halt(serial->dev, port->write_urb->pipe);
 398         usb_clear_halt(serial->dev, port->read_urb->pipe);
 399
 400         ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 401                               0x09, 0x00,
 402                               0x01, 0x00, NULL, 0x00, 100);
 403         if (ret)
 404                 return ret;
 405
 406         spcp8x5_set_ctrl_line(port, priv->line_control);
 407
 408         if (tty)
 409                 spcp8x5_set_termios(tty, port, NULL);
 410
 411         return usb_serial_generic_open(tty, port);
 412 }
 413
 414 static int spcp8x5_tiocmset(struct tty_struct *tty,
 415                             unsigned int set, unsigned int clear)
 416 {
 417         struct usb_serial_port *port = tty->driver_data;
 418         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 419         unsigned long flags;
 420         u8 control;
 421
 422         spin_lock_irqsave(&priv->lock, flags);
 423         if (set & TIOCM_RTS)
 424                 priv->line_control |= MCR_RTS;
 425         if (set & TIOCM_DTR)
 426                 priv->line_control |= MCR_DTR;
 427         if (clear & TIOCM_RTS)
 428                 priv->line_control &= ~MCR_RTS;
 429         if (clear & TIOCM_DTR)
 430                 priv->line_control &= ~MCR_DTR;
 431         control = priv->line_control;
 432         spin_unlock_irqrestore(&priv->lock, flags);
 433
 434         return spcp8x5_set_ctrl_line(port, control);
 435 }
 436
 437 static int spcp8x5_tiocmget(struct tty_struct *tty)
 438 {
 439         struct usb_serial_port *port = tty->driver_data;
 440         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 441         unsigned long flags;
 442         unsigned int mcr;
 443         u8 status;
 444         unsigned int result;
 445
 446         result = spcp8x5_get_msr(port, &status);
 447         if (result)
 448                 return result;
 449
 450         spin_lock_irqsave(&priv->lock, flags);
 451         mcr = priv->line_control;
 452         spin_unlock_irqrestore(&priv->lock, flags);
 453
 454         result = ((mcr & MCR_DTR)                       ? TIOCM_DTR : 0)
 455                   | ((mcr & MCR_RTS)                    ? TIOCM_RTS : 0)
 456                   | ((status & MSR_STATUS_LINE_CTS)     ? TIOCM_CTS : 0)
 457                   | ((status & MSR_STATUS_LINE_DSR)     ? TIOCM_DSR : 0)
 458                   | ((status & MSR_STATUS_LINE_RI)      ? TIOCM_RI  : 0)
 459                   | ((status & MSR_STATUS_LINE_DCD)     ? TIOCM_CD  : 0);
 460
 461         return result;
 462 }
 463
 464 static struct usb_serial_driver spcp8x5_device = {
 465         .driver = {
 466                 .owner =        THIS_MODULE,
 467                 .name =         "SPCP8x5",
 468         },
 469         .id_table               = id_table,
 470         .num_ports              = 1,
 471         .num_bulk_in            = 1,
 472         .num_bulk_out           = 1,
 473         .open                   = spcp8x5_open,
 474         .dtr_rts                = spcp8x5_dtr_rts,
 475         .carrier_raised         = spcp8x5_carrier_raised,
 476         .set_termios            = spcp8x5_set_termios,
 477         .init_termios           = spcp8x5_init_termios,
 478         .tiocmget               = spcp8x5_tiocmget,
 479         .tiocmset               = spcp8x5_tiocmset,
 480         .probe                  = spcp8x5_probe,
 481         .port_probe             = spcp8x5_port_probe,
 482         .port_remove            = spcp8x5_port_remove,
 483 };
 484
 485 static struct usb_serial_driver * const serial_drivers[] = {
 486         &spcp8x5_device, NULL
 487 };
 488
 489 module_usb_serial_driver(serial_drivers, id_table);
 490
 491 MODULE_DESCRIPTION(DRIVER_DESC);
 492 MODULE_LICENSE("GPL");