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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_port_probe(struct usb_serial_port *port)
158 {
159         const struct usb_device_id *id = usb_get_serial_data(port->serial);
160         struct spcp8x5_private *priv;
161 
162         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
163         if (!priv)
164                 return -ENOMEM;
165 
166         spin_lock_init(&priv->lock);
167         priv->quirks = id->driver_info;
168 
169         usb_set_serial_port_data(port, priv);
170 
171         port->port.drain_delay = 256;
172 
173         return 0;
174 }
175 
176 static int spcp8x5_port_remove(struct usb_serial_port *port)
177 {
178         struct spcp8x5_private *priv;
179 
180         priv = usb_get_serial_port_data(port);
181         kfree(priv);
182 
183         return 0;
184 }
185 
186 static int spcp8x5_set_ctrl_line(struct usb_serial_port *port, u8 mcr)
187 {
188         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
189         struct usb_device *dev = port->serial->dev;
190         int retval;
191 
192         if (priv->quirks & SPCP825_QUIRK_NO_UART_STATUS)
193                 return -EPERM;
194 
195         retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
196                                  SET_UART_STATUS_TYPE, SET_UART_STATUS,
197                                  mcr, 0x04, NULL, 0, 100);
198         if (retval != 0) {
199                 dev_err(&port->dev, "failed to set control lines: %d\n",
200                                                                 retval);
201         }
202         return retval;
203 }
204 
205 static int spcp8x5_get_msr(struct usb_serial_port *port, u8 *status)
206 {
207         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
208         struct usb_device *dev = port->serial->dev;
209         u8 *buf;
210         int ret;
211 
212         if (priv->quirks & SPCP825_QUIRK_NO_UART_STATUS)
213                 return -EPERM;
214 
215         buf = kzalloc(1, GFP_KERNEL);
216         if (!buf)
217                 return -ENOMEM;
218 
219         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
220                               GET_UART_STATUS, GET_UART_STATUS_TYPE,
221                               0, GET_UART_STATUS_MSR, buf, 1, 100);
222         if (ret < 0)
223                 dev_err(&port->dev, "failed to get modem status: %d", ret);
224 
225         dev_dbg(&port->dev, "0xc0:0x22:0:6  %d - 0x02%x", ret, *buf);
226         *status = *buf;
227         kfree(buf);
228 
229         return ret;
230 }
231 
232 static void spcp8x5_set_work_mode(struct usb_serial_port *port, u16 value,
233                                                                  u16 index)
234 {
235         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
236         struct usb_device *dev = port->serial->dev;
237         int ret;
238 
239         if (priv->quirks & SPCP825_QUIRK_NO_WORK_MODE)
240                 return;
241 
242         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
243                               SET_WORKING_MODE_TYPE, SET_WORKING_MODE,
244                               value, index, NULL, 0, 100);
245         dev_dbg(&port->dev, "value = %#x , index = %#x\n", value, index);
246         if (ret < 0)
247                 dev_err(&port->dev, "failed to set work mode: %d\n", ret);
248 }
249 
250 static int spcp8x5_carrier_raised(struct usb_serial_port *port)
251 {
252         u8 msr;
253         int ret;
254 
255         ret = spcp8x5_get_msr(port, &msr);
256         if (ret || msr & MSR_STATUS_LINE_DCD)
257                 return 1;
258 
259         return 0;
260 }
261 
262 static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on)
263 {
264         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
265         unsigned long flags;
266         u8 control;
267 
268         spin_lock_irqsave(&priv->lock, flags);
269         if (on)
270                 priv->line_control = MCR_CONTROL_LINE_DTR
271                                                 | MCR_CONTROL_LINE_RTS;
272         else
273                 priv->line_control &= ~ (MCR_CONTROL_LINE_DTR
274                                                 | MCR_CONTROL_LINE_RTS);
275         control = priv->line_control;
276         spin_unlock_irqrestore(&priv->lock, flags);
277         spcp8x5_set_ctrl_line(port, control);
278 }
279 
280 static void spcp8x5_init_termios(struct tty_struct *tty)
281 {
282         tty->termios = tty_std_termios;
283         tty->termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
284         tty->termios.c_ispeed = 115200;
285         tty->termios.c_ospeed = 115200;
286 }
287 
288 static void spcp8x5_set_termios(struct tty_struct *tty,
289                 struct usb_serial_port *port, struct ktermios *old_termios)
290 {
291         struct usb_serial *serial = port->serial;
292         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
293         unsigned long flags;
294         unsigned int cflag = tty->termios.c_cflag;
295         unsigned short uartdata;
296         unsigned char buf[2] = {0, 0};
297         int baud;
298         int i;
299         u8 control;
300 
301         /* check that they really want us to change something */
302         if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
303                 return;
304 
305         /* set DTR/RTS active */
306         spin_lock_irqsave(&priv->lock, flags);
307         control = priv->line_control;
308         if (old_termios && (old_termios->c_cflag & CBAUD) == B0) {
309                 priv->line_control |= MCR_DTR;
310                 if (!(old_termios->c_cflag & CRTSCTS))
311                         priv->line_control |= MCR_RTS;
312         }
313         if (control != priv->line_control) {
314                 control = priv->line_control;
315                 spin_unlock_irqrestore(&priv->lock, flags);
316                 spcp8x5_set_ctrl_line(port, control);
317         } else {
318                 spin_unlock_irqrestore(&priv->lock, flags);
319         }
320 
321         /* Set Baud Rate */
322         baud = tty_get_baud_rate(tty);
323         switch (baud) {
324         case 300:       buf[0] = 0x00;  break;
325         case 600:       buf[0] = 0x01;  break;
326         case 1200:      buf[0] = 0x02;  break;
327         case 2400:      buf[0] = 0x03;  break;
328         case 4800:      buf[0] = 0x04;  break;
329         case 9600:      buf[0] = 0x05;  break;
330         case 19200:     buf[0] = 0x07;  break;
331         case 38400:     buf[0] = 0x09;  break;
332         case 57600:     buf[0] = 0x0a;  break;
333         case 115200:    buf[0] = 0x0b;  break;
334         case 230400:    buf[0] = 0x0c;  break;
335         case 460800:    buf[0] = 0x0d;  break;
336         case 921600:    buf[0] = 0x0e;  break;
337 /*      case 1200000:   buf[0] = 0x0f;  break; */
338 /*      case 2400000:   buf[0] = 0x10;  break; */
339         case 3000000:   buf[0] = 0x11;  break;
340 /*      case 6000000:   buf[0] = 0x12;  break; */
341         case 0:
342         case 1000000:
343                         buf[0] = 0x0b;  break;
344         default:
345                 dev_err(&port->dev, "spcp825 driver does not support the "
346                         "baudrate requested, using default of 9600.\n");
347         }
348 
349         /* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */
350         switch (cflag & CSIZE) {
351         case CS5:
352                 buf[1] |= SET_UART_FORMAT_SIZE_5;
353                 break;
354         case CS6:
355                 buf[1] |= SET_UART_FORMAT_SIZE_6;
356                 break;
357         case CS7:
358                 buf[1] |= SET_UART_FORMAT_SIZE_7;
359                 break;
360         default:
361         case CS8:
362                 buf[1] |= SET_UART_FORMAT_SIZE_8;
363                 break;
364         }
365 
366         /* Set Stop bit2 : 0:1bit 1:2bit */
367         buf[1] |= (cflag & CSTOPB) ? SET_UART_FORMAT_STOP_2 :
368                                      SET_UART_FORMAT_STOP_1;
369 
370         /* Set Parity bit3-4 01:Odd 11:Even */
371         if (cflag & PARENB) {
372                 buf[1] |= (cflag & PARODD) ?
373                 SET_UART_FORMAT_PAR_ODD : SET_UART_FORMAT_PAR_EVEN ;
374         } else {
375                 buf[1] |= SET_UART_FORMAT_PAR_NONE;
376         }
377         uartdata = buf[0] | buf[1]<<8;
378 
379         i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
380                             SET_UART_FORMAT_TYPE, SET_UART_FORMAT,
381                             uartdata, 0, NULL, 0, 100);
382         if (i < 0)
383                 dev_err(&port->dev, "Set UART format %#x failed (error = %d)\n",
384                         uartdata, i);
385         dev_dbg(&port->dev, "0x21:0x40:0:0  %d\n", i);
386 
387         if (cflag & CRTSCTS) {
388                 /* enable hardware flow control */
389                 spcp8x5_set_work_mode(port, 0x000a, SET_WORKING_MODE_U2C);
390         }
391 }
392 
393 static int spcp8x5_open(struct tty_struct *tty, struct usb_serial_port *port)
394 {
395         struct usb_serial *serial = port->serial;
396         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
397         int ret;
398 
399         usb_clear_halt(serial->dev, port->write_urb->pipe);
400         usb_clear_halt(serial->dev, port->read_urb->pipe);
401 
402         ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
403                               0x09, 0x00,
404                               0x01, 0x00, NULL, 0x00, 100);
405         if (ret)
406                 return ret;
407 
408         spcp8x5_set_ctrl_line(port, priv->line_control);
409 
410         if (tty)
411                 spcp8x5_set_termios(tty, port, NULL);
412 
413         return usb_serial_generic_open(tty, port);
414 }
415 
416 static int spcp8x5_tiocmset(struct tty_struct *tty,
417                             unsigned int set, unsigned int clear)
418 {
419         struct usb_serial_port *port = tty->driver_data;
420         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
421         unsigned long flags;
422         u8 control;
423 
424         spin_lock_irqsave(&priv->lock, flags);
425         if (set & TIOCM_RTS)
426                 priv->line_control |= MCR_RTS;
427         if (set & TIOCM_DTR)
428                 priv->line_control |= MCR_DTR;
429         if (clear & TIOCM_RTS)
430                 priv->line_control &= ~MCR_RTS;
431         if (clear & TIOCM_DTR)
432                 priv->line_control &= ~MCR_DTR;
433         control = priv->line_control;
434         spin_unlock_irqrestore(&priv->lock, flags);
435 
436         return spcp8x5_set_ctrl_line(port, control);
437 }
438 
439 static int spcp8x5_tiocmget(struct tty_struct *tty)
440 {
441         struct usb_serial_port *port = tty->driver_data;
442         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
443         unsigned long flags;
444         unsigned int mcr;
445         u8 status;
446         unsigned int result;
447 
448         result = spcp8x5_get_msr(port, &status);
449         if (result)
450                 return result;
451 
452         spin_lock_irqsave(&priv->lock, flags);
453         mcr = priv->line_control;
454         spin_unlock_irqrestore(&priv->lock, flags);
455 
456         result = ((mcr & MCR_DTR)                       ? TIOCM_DTR : 0)
457                   | ((mcr & MCR_RTS)                    ? TIOCM_RTS : 0)
458                   | ((status & MSR_STATUS_LINE_CTS)     ? TIOCM_CTS : 0)
459                   | ((status & MSR_STATUS_LINE_DSR)     ? TIOCM_DSR : 0)
460                   | ((status & MSR_STATUS_LINE_RI)      ? TIOCM_RI  : 0)
461                   | ((status & MSR_STATUS_LINE_DCD)     ? TIOCM_CD  : 0);
462 
463         return result;
464 }
465 
466 static struct usb_serial_driver spcp8x5_device = {
467         .driver = {
468                 .owner =        THIS_MODULE,
469                 .name =         "SPCP8x5",
470         },
471         .id_table               = id_table,
472         .num_ports              = 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");
493 

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