Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

Linux/drivers/usb/serial/spcp8x5.c

  1 /*
  2  * spcp8x5 USB to serial adaptor driver
  3  *
  4  * Copyright (C) 2010-2013 Johan Hovold (jhovold@gmail.com)
  5  * Copyright (C) 2006 Linxb (xubin.lin@worldplus.com.cn)
  6  * Copyright (C) 2006 S1 Corp.
  7  *
  8  * Original driver for 2.6.10 pl2303 driver by
  9  *   Greg Kroah-Hartman (greg@kroah.com)
 10  * Changes for 2.6.20 by Harald Klein <hari@vt100.at>
 11  *
 12  *      This program is free software; you can redistribute it and/or modify
 13  *      it under the terms of the GNU General Public License as published by
 14  *      the Free Software Foundation; either version 2 of the License, or
 15  *      (at your option) any later version.
 16  */
 17 #include <linux/kernel.h>
 18 #include <linux/errno.h>
 19 #include <linux/slab.h>
 20 #include <linux/tty.h>
 21 #include <linux/tty_driver.h>
 22 #include <linux/tty_flip.h>
 23 #include <linux/module.h>
 24 #include <linux/spinlock.h>
 25 #include <linux/usb.h>
 26 #include <linux/usb/serial.h>
 27 
 28 #define DRIVER_DESC     "SPCP8x5 USB to serial adaptor driver"
 29 
 30 #define SPCP825_QUIRK_NO_UART_STATUS    0x01
 31 #define SPCP825_QUIRK_NO_WORK_MODE      0x02
 32 
 33 #define SPCP8x5_007_VID         0x04FC
 34 #define SPCP8x5_007_PID         0x0201
 35 #define SPCP8x5_008_VID         0x04fc
 36 #define SPCP8x5_008_PID         0x0235
 37 #define SPCP8x5_PHILIPS_VID     0x0471
 38 #define SPCP8x5_PHILIPS_PID     0x081e
 39 #define SPCP8x5_INTERMATIC_VID  0x04FC
 40 #define SPCP8x5_INTERMATIC_PID  0x0204
 41 #define SPCP8x5_835_VID         0x04fc
 42 #define SPCP8x5_835_PID         0x0231
 43 
 44 static const struct usb_device_id id_table[] = {
 45         { USB_DEVICE(SPCP8x5_PHILIPS_VID , SPCP8x5_PHILIPS_PID)},
 46         { USB_DEVICE(SPCP8x5_INTERMATIC_VID, SPCP8x5_INTERMATIC_PID)},
 47         { USB_DEVICE(SPCP8x5_835_VID, SPCP8x5_835_PID)},
 48         { USB_DEVICE(SPCP8x5_008_VID, SPCP8x5_008_PID)},
 49         { USB_DEVICE(SPCP8x5_007_VID, SPCP8x5_007_PID),
 50           .driver_info = SPCP825_QUIRK_NO_UART_STATUS |
 51                                 SPCP825_QUIRK_NO_WORK_MODE },
 52         { }                                     /* Terminating entry */
 53 };
 54 MODULE_DEVICE_TABLE(usb, id_table);
 55 
 56 struct spcp8x5_usb_ctrl_arg {
 57         u8      type;
 58         u8      cmd;
 59         u8      cmd_type;
 60         u16     value;
 61         u16     index;
 62         u16     length;
 63 };
 64 
 65 
 66 /* spcp8x5 spec register define */
 67 #define MCR_CONTROL_LINE_RTS            0x02
 68 #define MCR_CONTROL_LINE_DTR            0x01
 69 #define MCR_DTR                         0x01
 70 #define MCR_RTS                         0x02
 71 
 72 #define MSR_STATUS_LINE_DCD             0x80
 73 #define MSR_STATUS_LINE_RI              0x40
 74 #define MSR_STATUS_LINE_DSR             0x20
 75 #define MSR_STATUS_LINE_CTS             0x10
 76 
 77 /* verdor command here , we should define myself */
 78 #define SET_DEFAULT                     0x40
 79 #define SET_DEFAULT_TYPE                0x20
 80 
 81 #define SET_UART_FORMAT                 0x40
 82 #define SET_UART_FORMAT_TYPE            0x21
 83 #define SET_UART_FORMAT_SIZE_5          0x00
 84 #define SET_UART_FORMAT_SIZE_6          0x01
 85 #define SET_UART_FORMAT_SIZE_7          0x02
 86 #define SET_UART_FORMAT_SIZE_8          0x03
 87 #define SET_UART_FORMAT_STOP_1          0x00
 88 #define SET_UART_FORMAT_STOP_2          0x04
 89 #define SET_UART_FORMAT_PAR_NONE        0x00
 90 #define SET_UART_FORMAT_PAR_ODD         0x10
 91 #define SET_UART_FORMAT_PAR_EVEN        0x30
 92 #define SET_UART_FORMAT_PAR_MASK        0xD0
 93 #define SET_UART_FORMAT_PAR_SPACE       0x90
 94 
 95 #define GET_UART_STATUS_TYPE            0xc0
 96 #define GET_UART_STATUS                 0x22
 97 #define GET_UART_STATUS_MSR             0x06
 98 
 99 #define SET_UART_STATUS                 0x40
100 #define SET_UART_STATUS_TYPE            0x23
101 #define SET_UART_STATUS_MCR             0x0004
102 #define SET_UART_STATUS_MCR_DTR         0x01
103 #define SET_UART_STATUS_MCR_RTS         0x02
104 #define SET_UART_STATUS_MCR_LOOP        0x10
105 
106 #define SET_WORKING_MODE                0x40
107 #define SET_WORKING_MODE_TYPE           0x24
108 #define SET_WORKING_MODE_U2C            0x00
109 #define SET_WORKING_MODE_RS485          0x01
110 #define SET_WORKING_MODE_PDMA           0x02
111 #define SET_WORKING_MODE_SPP            0x03
112 
113 #define SET_FLOWCTL_CHAR                0x40
114 #define SET_FLOWCTL_CHAR_TYPE           0x25
115 
116 #define GET_VERSION                     0xc0
117 #define GET_VERSION_TYPE                0x26
118 
119 #define SET_REGISTER                    0x40
120 #define SET_REGISTER_TYPE               0x27
121 
122 #define GET_REGISTER                    0xc0
123 #define GET_REGISTER_TYPE               0x28
124 
125 #define SET_RAM                         0x40
126 #define SET_RAM_TYPE                    0x31
127 
128 #define GET_RAM                         0xc0
129 #define GET_RAM_TYPE                    0x32
130 
131 /* how come ??? */
132 #define UART_STATE                      0x08
133 #define UART_STATE_TRANSIENT_MASK       0x75
134 #define UART_DCD                        0x01
135 #define UART_DSR                        0x02
136 #define UART_BREAK_ERROR                0x04
137 #define UART_RING                       0x08
138 #define UART_FRAME_ERROR                0x10
139 #define UART_PARITY_ERROR               0x20
140 #define UART_OVERRUN_ERROR              0x40
141 #define UART_CTS                        0x80
142 
143 struct spcp8x5_private {
144         unsigned                quirks;
145         spinlock_t              lock;
146         u8                      line_control;
147 };
148 
149 static int spcp8x5_probe(struct usb_serial *serial,
150                                                 const struct usb_device_id *id)
151 {
152         usb_set_serial_data(serial, (void *)id);
153 
154         return 0;
155 }
156 
157 static int spcp8x5_attach(struct usb_serial *serial)
158 {
159         unsigned char num_ports = serial->num_ports;
160 
161         if (serial->num_bulk_in < num_ports ||
162                         serial->num_bulk_out < num_ports) {
163                 dev_err(&serial->interface->dev, "missing endpoints\n");
164                 return -ENODEV;
165         }
166 
167         return 0;
168 }
169 
170 static int spcp8x5_port_probe(struct usb_serial_port *port)
171 {
172         const struct usb_device_id *id = usb_get_serial_data(port->serial);
173         struct spcp8x5_private *priv;
174 
175         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
176         if (!priv)
177                 return -ENOMEM;
178 
179         spin_lock_init(&priv->lock);
180         priv->quirks = id->driver_info;
181 
182         usb_set_serial_port_data(port, priv);
183 
184         port->port.drain_delay = 256;
185 
186         return 0;
187 }
188 
189 static int spcp8x5_port_remove(struct usb_serial_port *port)
190 {
191         struct spcp8x5_private *priv;
192 
193         priv = usb_get_serial_port_data(port);
194         kfree(priv);
195 
196         return 0;
197 }
198 
199 static int spcp8x5_set_ctrl_line(struct usb_serial_port *port, u8 mcr)
200 {
201         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
202         struct usb_device *dev = port->serial->dev;
203         int retval;
204 
205         if (priv->quirks & SPCP825_QUIRK_NO_UART_STATUS)
206                 return -EPERM;
207 
208         retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
209                                  SET_UART_STATUS_TYPE, SET_UART_STATUS,
210                                  mcr, 0x04, NULL, 0, 100);
211         if (retval != 0) {
212                 dev_err(&port->dev, "failed to set control lines: %d\n",
213                                                                 retval);
214         }
215         return retval;
216 }
217 
218 static int spcp8x5_get_msr(struct usb_serial_port *port, u8 *status)
219 {
220         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
221         struct usb_device *dev = port->serial->dev;
222         u8 *buf;
223         int ret;
224 
225         if (priv->quirks & SPCP825_QUIRK_NO_UART_STATUS)
226                 return -EPERM;
227 
228         buf = kzalloc(1, GFP_KERNEL);
229         if (!buf)
230                 return -ENOMEM;
231 
232         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
233                               GET_UART_STATUS, GET_UART_STATUS_TYPE,
234                               0, GET_UART_STATUS_MSR, buf, 1, 100);
235         if (ret < 0)
236                 dev_err(&port->dev, "failed to get modem status: %d\n", ret);
237 
238         dev_dbg(&port->dev, "0xc0:0x22:0:6  %d - 0x02%x\n", ret, *buf);
239         *status = *buf;
240         kfree(buf);
241 
242         return ret;
243 }
244 
245 static void spcp8x5_set_work_mode(struct usb_serial_port *port, u16 value,
246                                                                  u16 index)
247 {
248         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
249         struct usb_device *dev = port->serial->dev;
250         int ret;
251 
252         if (priv->quirks & SPCP825_QUIRK_NO_WORK_MODE)
253                 return;
254 
255         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
256                               SET_WORKING_MODE_TYPE, SET_WORKING_MODE,
257                               value, index, NULL, 0, 100);
258         dev_dbg(&port->dev, "value = %#x , index = %#x\n", value, index);
259         if (ret < 0)
260                 dev_err(&port->dev, "failed to set work mode: %d\n", ret);
261 }
262 
263 static int spcp8x5_carrier_raised(struct usb_serial_port *port)
264 {
265         u8 msr;
266         int ret;
267 
268         ret = spcp8x5_get_msr(port, &msr);
269         if (ret || msr & MSR_STATUS_LINE_DCD)
270                 return 1;
271 
272         return 0;
273 }
274 
275 static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on)
276 {
277         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
278         unsigned long flags;
279         u8 control;
280 
281         spin_lock_irqsave(&priv->lock, flags);
282         if (on)
283                 priv->line_control = MCR_CONTROL_LINE_DTR
284                                                 | MCR_CONTROL_LINE_RTS;
285         else
286                 priv->line_control &= ~ (MCR_CONTROL_LINE_DTR
287                                                 | MCR_CONTROL_LINE_RTS);
288         control = priv->line_control;
289         spin_unlock_irqrestore(&priv->lock, flags);
290         spcp8x5_set_ctrl_line(port, control);
291 }
292 
293 static void spcp8x5_init_termios(struct tty_struct *tty)
294 {
295         tty->termios = tty_std_termios;
296         tty->termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
297         tty->termios.c_ispeed = 115200;
298         tty->termios.c_ospeed = 115200;
299 }
300 
301 static void spcp8x5_set_termios(struct tty_struct *tty,
302                 struct usb_serial_port *port, struct ktermios *old_termios)
303 {
304         struct usb_serial *serial = port->serial;
305         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
306         unsigned long flags;
307         unsigned int cflag = tty->termios.c_cflag;
308         unsigned short uartdata;
309         unsigned char buf[2] = {0, 0};
310         int baud;
311         int i;
312         u8 control;
313 
314         /* check that they really want us to change something */
315         if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
316                 return;
317 
318         /* set DTR/RTS active */
319         spin_lock_irqsave(&priv->lock, flags);
320         control = priv->line_control;
321         if (old_termios && (old_termios->c_cflag & CBAUD) == B0) {
322                 priv->line_control |= MCR_DTR;
323                 if (!(old_termios->c_cflag & CRTSCTS))
324                         priv->line_control |= MCR_RTS;
325         }
326         if (control != priv->line_control) {
327                 control = priv->line_control;
328                 spin_unlock_irqrestore(&priv->lock, flags);
329                 spcp8x5_set_ctrl_line(port, control);
330         } else {
331                 spin_unlock_irqrestore(&priv->lock, flags);
332         }
333 
334         /* Set Baud Rate */
335         baud = tty_get_baud_rate(tty);
336         switch (baud) {
337         case 300:       buf[0] = 0x00;  break;
338         case 600:       buf[0] = 0x01;  break;
339         case 1200:      buf[0] = 0x02;  break;
340         case 2400:      buf[0] = 0x03;  break;
341         case 4800:      buf[0] = 0x04;  break;
342         case 9600:      buf[0] = 0x05;  break;
343         case 19200:     buf[0] = 0x07;  break;
344         case 38400:     buf[0] = 0x09;  break;
345         case 57600:     buf[0] = 0x0a;  break;
346         case 115200:    buf[0] = 0x0b;  break;
347         case 230400:    buf[0] = 0x0c;  break;
348         case 460800:    buf[0] = 0x0d;  break;
349         case 921600:    buf[0] = 0x0e;  break;
350 /*      case 1200000:   buf[0] = 0x0f;  break; */
351 /*      case 2400000:   buf[0] = 0x10;  break; */
352         case 3000000:   buf[0] = 0x11;  break;
353 /*      case 6000000:   buf[0] = 0x12;  break; */
354         case 0:
355         case 1000000:
356                         buf[0] = 0x0b;  break;
357         default:
358                 dev_err(&port->dev, "unsupported baudrate, using 9600\n");
359         }
360 
361         /* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */
362         switch (cflag & CSIZE) {
363         case CS5:
364                 buf[1] |= SET_UART_FORMAT_SIZE_5;
365                 break;
366         case CS6:
367                 buf[1] |= SET_UART_FORMAT_SIZE_6;
368                 break;
369         case CS7:
370                 buf[1] |= SET_UART_FORMAT_SIZE_7;
371                 break;
372         default:
373         case CS8:
374                 buf[1] |= SET_UART_FORMAT_SIZE_8;
375                 break;
376         }
377 
378         /* Set Stop bit2 : 0:1bit 1:2bit */
379         buf[1] |= (cflag & CSTOPB) ? SET_UART_FORMAT_STOP_2 :
380                                      SET_UART_FORMAT_STOP_1;
381 
382         /* Set Parity bit3-4 01:Odd 11:Even */
383         if (cflag & PARENB) {
384                 buf[1] |= (cflag & PARODD) ?
385                 SET_UART_FORMAT_PAR_ODD : SET_UART_FORMAT_PAR_EVEN ;
386         } else {
387                 buf[1] |= SET_UART_FORMAT_PAR_NONE;
388         }
389         uartdata = buf[0] | buf[1]<<8;
390 
391         i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
392                             SET_UART_FORMAT_TYPE, SET_UART_FORMAT,
393                             uartdata, 0, NULL, 0, 100);
394         if (i < 0)
395                 dev_err(&port->dev, "Set UART format %#x failed (error = %d)\n",
396                         uartdata, i);
397         dev_dbg(&port->dev, "0x21:0x40:0:0  %d\n", i);
398 
399         if (cflag & CRTSCTS) {
400                 /* enable hardware flow control */
401                 spcp8x5_set_work_mode(port, 0x000a, SET_WORKING_MODE_U2C);
402         }
403 }
404 
405 static int spcp8x5_open(struct tty_struct *tty, struct usb_serial_port *port)
406 {
407         struct usb_serial *serial = port->serial;
408         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
409         int ret;
410 
411         usb_clear_halt(serial->dev, port->write_urb->pipe);
412         usb_clear_halt(serial->dev, port->read_urb->pipe);
413 
414         ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
415                               0x09, 0x00,
416                               0x01, 0x00, NULL, 0x00, 100);
417         if (ret)
418                 return ret;
419 
420         spcp8x5_set_ctrl_line(port, priv->line_control);
421 
422         if (tty)
423                 spcp8x5_set_termios(tty, port, NULL);
424 
425         return usb_serial_generic_open(tty, port);
426 }
427 
428 static int spcp8x5_tiocmset(struct tty_struct *tty,
429                             unsigned int set, unsigned int clear)
430 {
431         struct usb_serial_port *port = tty->driver_data;
432         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
433         unsigned long flags;
434         u8 control;
435 
436         spin_lock_irqsave(&priv->lock, flags);
437         if (set & TIOCM_RTS)
438                 priv->line_control |= MCR_RTS;
439         if (set & TIOCM_DTR)
440                 priv->line_control |= MCR_DTR;
441         if (clear & TIOCM_RTS)
442                 priv->line_control &= ~MCR_RTS;
443         if (clear & TIOCM_DTR)
444                 priv->line_control &= ~MCR_DTR;
445         control = priv->line_control;
446         spin_unlock_irqrestore(&priv->lock, flags);
447 
448         return spcp8x5_set_ctrl_line(port, control);
449 }
450 
451 static int spcp8x5_tiocmget(struct tty_struct *tty)
452 {
453         struct usb_serial_port *port = tty->driver_data;
454         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
455         unsigned long flags;
456         unsigned int mcr;
457         u8 status;
458         unsigned int result;
459 
460         result = spcp8x5_get_msr(port, &status);
461         if (result)
462                 return result;
463 
464         spin_lock_irqsave(&priv->lock, flags);
465         mcr = priv->line_control;
466         spin_unlock_irqrestore(&priv->lock, flags);
467 
468         result = ((mcr & MCR_DTR)                       ? TIOCM_DTR : 0)
469                   | ((mcr & MCR_RTS)                    ? TIOCM_RTS : 0)
470                   | ((status & MSR_STATUS_LINE_CTS)     ? TIOCM_CTS : 0)
471                   | ((status & MSR_STATUS_LINE_DSR)     ? TIOCM_DSR : 0)
472                   | ((status & MSR_STATUS_LINE_RI)      ? TIOCM_RI  : 0)
473                   | ((status & MSR_STATUS_LINE_DCD)     ? TIOCM_CD  : 0);
474 
475         return result;
476 }
477 
478 static struct usb_serial_driver spcp8x5_device = {
479         .driver = {
480                 .owner =        THIS_MODULE,
481                 .name =         "SPCP8x5",
482         },
483         .id_table               = id_table,
484         .num_ports              = 1,
485         .open                   = spcp8x5_open,
486         .dtr_rts                = spcp8x5_dtr_rts,
487         .carrier_raised         = spcp8x5_carrier_raised,
488         .set_termios            = spcp8x5_set_termios,
489         .init_termios           = spcp8x5_init_termios,
490         .tiocmget               = spcp8x5_tiocmget,
491         .tiocmset               = spcp8x5_tiocmset,
492         .probe                  = spcp8x5_probe,
493         .attach                 = spcp8x5_attach,
494         .port_probe             = spcp8x5_port_probe,
495         .port_remove            = spcp8x5_port_remove,
496 };
497 
498 static struct usb_serial_driver * const serial_drivers[] = {
499         &spcp8x5_device, NULL
500 };
501 
502 module_usb_serial_driver(serial_drivers, id_table);
503 
504 MODULE_DESCRIPTION(DRIVER_DESC);
505 MODULE_LICENSE("GPL");
506 

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