aboutsummaryrefslogtreecommitdiffstats
path: root/drv_Noritake.c
blob: 9b1678d1e59ec19daa42798b6be5ceb89a7bd494 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
/* $Id: drv_Noritake.c,v 1.3 2005/05/05 08:36:12 reinelt Exp $
 * 
 * Driver for a Noritake GU128x32-311 graphical display.
 * 
 * Copyright (C) 2005 Julien Aube <ob@obconseil.net>
 * Copyright (C) 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * LCD4Linux is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * $Log: drv_Noritake.c,v $
 * Revision 1.3  2005/05/05 08:36:12  reinelt
 * changed SELECT to SLCTIN
 *
 * Revision 1.2  2005/05/04 07:18:44  obconseil
 * Driver modified according to Michels's recommendations :
 *
 * - Suppressed linux/parport.h depandancy. It was not needed anyway.
 * - Compile-time disable the wait_busy polling function, replaced with a time wait.
 * - Replaced the hardwire_* calls by their wire_* equivalent, to adapt other wirings.
 * - Created a "Models" structure, containing parameters for the display.
 * - Other cleanups, to remove compile-time warnings.
 *
 * Revision 1.1  2005/05/04 05:42:38  reinelt
 * Noritake driver added
 *
 */

/*
 * *** Noritake Itron GU128x32-311 ***
 * A 128x32 VFD (Vacuum Fluorescent Display).
 * It is driver by a Hitachi microcontroller, with a specific 
 * firmware. 
 * The datasheet can be easily found on the internet by searching for the 
 * the name of the display, it's a PDF file that describe the timing, and 
 * the protocol to communicate with the Hitachi microcontroller.
 * 
 * The display support 2 modes (that can be mutiplexed), one text mode
 * thanks to an integrated character generator, and provide 4 lines of 
 * 21 caracters.
 * There is also a graphical mode that can be used to switch on or off
 * each one if the 128x32 pixels. (monochrome).
 * 
 * The protocol include the possibility to clear the display memory quickly,
 * change the luminosity, swich the display on or off (without affecting the 
 * content of the memory) and finally change the "page" or the caracter 
 * generator. Two pages are available in the ROM, all the characters are 
 * listed in the documentation.
 *
 * This driver support only the character mode at the moment.
 * A future release will support the graphical mode as an option.
 * 
 * This driver is released under the GPL.
 */

/* 
 *
 * exported fuctions:
 *
 * struct DRIVER drv_Noritake
 *
 */

#include "config.h"

#include <stdlib.h>
#include <unistd.h>
#include <string.h>

#include "debug.h"
#include "cfg.h"
#include "qprintf.h"
#include "plugin.h"
#include "widget.h"
#include "widget_text.h"
#include "widget_icon.h"
#include "widget_bar.h"
#include "drv.h"
#include "udelay.h"
#include "drv_generic_text.h"
#include "drv_generic_parport.h"


static char Name[]="Noritake";

typedef struct {
  int type;
  char *name;
  int rows;
  int cols;
  int xres;
  int yrex;
  int goto_cost;
  int protocol;
} MODEL;

static int Model,Protocol;
static MODEL Models[] = {
  { 0x01, "GU311",            4, 21,  6,  8, 5, 1 },
  { 0x02, "GU311_Graphic",    4, 21,  6,  8, 6, 1 },
  { 0xff, "Unknown", -1, -1, -1, -1, -1, -1 }
};

static unsigned char SIGNAL_CS;    /* Chip select, OUTPUT, negative logic, pport AUTOFEED */
static unsigned char SIGNAL_WR;    /* Write        OUTPUT, negative logic, pport STOBE */
static unsigned char SIGNAL_RESET; /* Reset,       OUTPUT, negative logic, pport INIT */
static unsigned char SIGNAL_BLANK; /* Blank,       OUTPUT , negative logic, pport SELECT-IN */
/* static unsigned char SIGNAL_BUSY;*/  /* Busy,        INPUT , positive logic, pport BUSY, not used */
/* static unsigned char SIGNAL_FRP;*/   /* Frame Pulse, INPUT , positive logic, pport ACK, not used */ 
void (*drv_Noritake_clear) (void) ;

/* Data port is positive logic */


/****************************************/
/***  hardware dependant functions    ***/
/****************************************/

/* Low-level parport driving functions */

/* This function was used to pool the BUSY line on the parallel port, which 
can be linked to the BUSY line on the display. But since it works 
with a timed wait, this function is not necessary, and is kept just in case.*/
#if 0
static void drv_GU311_wait_busy(void)
{
    char c;
    
    c = drv_generic_parport_status();
    while ( (c & SIGNAL_BUSY) == 0 ) 
    {
       ndelay(200); /* Wait 100ns before next consultation of BUSY line 
                    if the first one was not successful */
       c = drv_generic_parport_status();
    }
}
#endif 


static void drv_GU311_send_char(char c)
{
   //drv_GU311_wait_busy(); /* ensuite the display is ready to take the command */
                            /* Disabled because all the cables does not have the busy line linked. */
   drv_generic_parport_data(c);
   ndelay(30); /* delay to ensure data line stabilisation on long cables */
   drv_generic_parport_control(SIGNAL_WR,0); /* write line to enable */
   ndelay(150); /* data hold time */
   drv_generic_parport_control(SIGNAL_WR,0xff);  /* write line to disable */
   ndelay(75); /* From spec : minimum time before next command */
}

static void drv_GU311_send_string(char * str, int size)
{
  int i;
  for (i=0;i<size;i++)
       drv_GU311_send_char(str[i]);
  
}

/* Command-string elaboration functions */
static void drv_GU311_make_text_string(const int row, const int col, const char *data, int len)
{
   static char cmd[96] = { 0x01,'C',0,0,'S',0 };
   unsigned char start_addr;
   
   /* Cols are 0x00..0x15, on 4 lines. */
   start_addr = ( 0x16 * row ) + col; 
   if ( start_addr > 0x57 ) return;
   if ( len > 0x57 ) return ;
   
   cmd[2] = start_addr;
   cmd[3] = len;
   
   memcpy(cmd+5,data,len);
   
   drv_GU311_send_string(cmd,len+5);
   
}

/* API functions */

static void drv_GU311_clear (void)
{
  static char clear_cmd[] = { 0x01, 'O', 'P' };
  drv_GU311_send_string(  clear_cmd, sizeof(clear_cmd) );
  ndelay(500); /* Delay for execution - this command is the longuest */
}


static void drv_GU311_write (const int row, const int col, const char *data, int len)
{
    drv_GU311_make_text_string(row,col,data, len);
}


static void drv_GU311_reset (void)
{
  drv_generic_parport_control(SIGNAL_RESET,0); /* initiate reset */
  ndelay(1000); /* reset hold time 1ms */
  drv_generic_parport_control(SIGNAL_RESET,0xff);
  ndelay(200000); /* reset ready time 200ms */

}


static int drv_GU311_start(const char *section)
{
  char   cmd[3] = { 0x01, 'O' };
  
  /* Parallel port opening and association */
  if (drv_generic_parport_open(section, Name) < 0) return -1;
  if ((SIGNAL_CS=drv_generic_parport_wire_ctrl    ("CS", "AUTOFD"))==0xff) return -1;
  if ((SIGNAL_WR=drv_generic_parport_wire_ctrl    ("WR", "STROBE"))==0xff) return -1;
  if ((SIGNAL_RESET=drv_generic_parport_wire_ctrl ("RESET", "INIT"))==0xff) return -1;
  if ((SIGNAL_BLANK=drv_generic_parport_wire_ctrl ("BLANK", "SLCTIN")  )==0xff) return -1;
  /* SIGNAL_BUSY=PARPORT_STATUS_BUSY; */ /* Not currently needed */ 
  /* SIGNAL_FRP=PARPORT_STATUS_ACK;   */ /* Not currently needed */
  
  /* Signals configuration */
  drv_generic_parport_direction(0); /* parallel port in output mode */
  drv_generic_parport_control(SIGNAL_CS|SIGNAL_WR|SIGNAL_RESET|SIGNAL_BLANK, 0xff);
                             /* All lines to "deactivate", -> 1 level on the wire */
  drv_generic_parport_control(SIGNAL_CS,0); /* CS to 0 all the time, write done by WR */
  drv_GU311_reset();
  
  /* Ready for commands from now on. */
  
  /* Display configuration */
  cmd[2] = '0' ; drv_GU311_send_string(cmd, sizeof(cmd) ); /* Select char. page 0 */
  cmd[2] = 'Q' ; drv_GU311_send_string(cmd, sizeof(cmd) ); /* Select 'Quick Mode' */ 
  cmd[2] = 'a' ; drv_GU311_send_string(cmd, sizeof(cmd) ); /* Brightness at 100% */
  cmd[2] = 'T' ; drv_GU311_send_string(cmd, sizeof(cmd) ); /* Ensure display ON */
  
  drv_Noritake_clear();
  return 0;
}



static int drv_Noritake_start (const char *section)
{
   char * model=0;
   int i;
   model=cfg_get(section, "Model", NULL);
   if (model!=NULL && *model!='\0') {
      for (i=0; Models[i].type!=0xff; i++) {
         if (strcasecmp(Models[i].name, model)==0) break;
      }
      if (Models[i].type==0xff) {
         error ("%s: %s.Model '%s' is unknown from %s", Name, section, model, cfg_source());
         return -1;
       }
       Model=i;
       info ("%s: using model '%s'", Name, Models[Model].name);
   } else {
       error ("%s: no '%s.Model' entry from %s", Name, section, cfg_source());
       return -1;
  }
  
  DROWS     = Models[Model].rows;
  DCOLS     = Models[Model].cols;
  XRES      = Models[Model].xres;
  YRES      = Models[Model].xres;
  GOTO_COST = Models[Model].goto_cost;
  Protocol  = Models[Model].protocol;
    /* display preferences */
  CHARS = 0;      /* number of user-defineable characters */
  CHAR0 = 0;      /* ASCII of first user-defineable char */


 
  /* real worker functions */
  drv_Noritake_clear = drv_GU311_clear;
  if ( Models[Model].type == 0x01 ) {
     drv_generic_text_real_write = drv_GU311_write;    
  } else {
     error("%s: Unsupported display. Currently supported are : GU311.",Name);
     return -1;
  }
  return drv_GU311_start(section);
}


/****************************************/
/***            plugins               ***/
/****************************************/

/* none */


/****************************************/
/***        widget callbacks          ***/
/****************************************/


/* using drv_generic_text_draw(W) */


/****************************************/
/***        exported functions        ***/
/****************************************/


/* list models */
int drv_Noritake_list (void)
{
  printf ("GU311 GU311_Graphic");
  return 0;
}


/* initialize driver & display */
int drv_Noritake_init (const char *section, const int quiet)
{
  WIDGET_CLASS wc;
  int ret;  
  
  /* start display */
  if ((ret=drv_Noritake_start (section))!=0)
    return ret;
    
  /* initialize generic text driver */
  if ((ret=drv_generic_text_init(section, Name))!=0)
    return ret;

  /* register text widget */
  wc=Widget_Text;
  wc.draw=drv_generic_text_draw;
  widget_register(&wc);
  
  /* register plugins */
  /* none */

  if (!quiet) {
    char buffer[40];
    qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS);
    if (drv_generic_text_greet (buffer, NULL)) {
      sleep (3);
      drv_Noritake_clear();
    }
  }

  return 0;
}


/* close driver & display */
int drv_Noritake_quit (const int quiet)
{

  info("%s: shutting down.", Name);
  
  /* clear display */
  drv_Noritake_clear();
  
  /* say goodbye... */
  if (!quiet) {
    drv_generic_text_greet ("goodbye!", NULL);
  }
  
  drv_generic_parport_close();
  drv_generic_text_quit();
  return (0);
}


DRIVER drv_Noritake = {
  name: Name,
  list: drv_Noritake_list,
  init: drv_Noritake_init,
  quit: drv_Noritake_quit, 
};