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1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2002 by Alan Korr
11 *
12 * All files in this archive are subject to the GNU General Public License.
13 * See the file COPYING in the source tree root for full license agreement.
14 *
15 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
16 * KIND, either express or implied.
17 *
18 ****************************************************************************/
19
20#ifndef __LCD_H__
21#define __LCD_H__
22
23#include <sh7034.h>
24#include <system.h>
25
26#define LCDR (PBDR+1)
27
28/* PA14 : /LCD-BL --- backlight */
29#define LCD_BL (14-8)
30
31#ifdef JBP /* JukeBox MP3 Player - AJB6K, AJBS20 */
32# define LCD_DS +1 // PB0 = 1 --- 0001 --- LCD-DS
33# define LCD_CS +2 // PB1 = 1 --- 0010 --- /LCD-CS
34# define LCD_SD +4 // PB2 = 1 --- 0100 --- LCD-SD
35# define LCD_SC +8 // PB3 = 1 --- 1000 --- LCD-SC
36# ifndef JBP_OLD
37# define LCD_CONTRAST_SET ((char)0x50)
38# define LCD_CRAM ((char)0x80) /* Characters */
39# define LCD_PRAM ((char)0xC0) /* Patterns */
40# define LCD_IRAM ((char)0x40) /* Icons */
41# else
42# define LCD_CONTRAST_SET ((char)0xA8)
43# define LCD_CRAM ((char)0xB0) /* Characters */
44# define LCD_PRAM ((char)0x80) /* Patterns */
45# define LCD_IRAM ((char)0xE0) /* Icons */
46# endif
47# define LCD_ASCII(c) (lcd_ascii[(c)&255])
48# define LCD_CURSOR(x,y) ((char)(LCD_CRAM+((y)*16+(x))))
49# define LCD_ICON(i) ((char)(LCD_IRAM+i))
50# define LCD_ICON_BATTERY 0
51# define LCD_BATTERY_FRAME 0x02
52# define LCD_BATTERY_BAR1 0x08
53# define LCD_BATTERY_BAR2 0x04
54# define LCD_BATTERY_BAR3 0x10
55# define LCD_ICON_USB 2
56# define LCD_USB_LOGO 0xFF
57# define LCD_ICON_PLAY 3
58# define LCD_PLAY_ICON 0xFF
59# define LCD_ICON_RECORD 4
60# define LCD_RECORD_ICON 0x10
61# define LCD_ICON_STOP 5
62# define LCD_STOP_ICON 0x0F
63# define LCD_ICON_AUDIO 5
64# define LCD_AUDIO_ICON 0xF0
65# define LCD_ICON_REVERSE 6
66# define LCD_REVERSE_ICON 0xFF
67# define LCD_ICON_SINGLE 7
68# define LCD_SINGLE_ICON 0xFF
69# define LCD_ICON_VOLUME0 9
70# define LCD_VOLUME_ICON 0x04
71# define LCD_VOLUME_BAR1 0x02
72# define LCD_VOLUME_BAR2 0x01
73# define LCD_ICON_VOLUME1 10
74# define LCD_VOLUME_BAR3 0x08
75# define LCD_VOLUME_BAR4 0x04
76# define LCD_VOLUME_BAR5 0x01
77# define LCD_ICON_PARAM 10
78# define LCD_PARAM_SYMBOL 0xF0
79#endif
80
81#ifdef JBR /* JukeBox MP3 Recorder - AJBR --- FIXME */
82# error "JBR : FIX ME"
83#endif
84
85
86/*
87 * About /CS,DS,SC,SD
88 * ------------------
89 *
90 * LCD on JBP and JBR uses a SPI protocol to receive orders (SDA and SCK lines)
91 *
92 * - /CS -> Chip Selection line :
93 * 0 : LCD chipset is activated.
94 * - DS -> Data Selection line, latched at the rising edge
95 * of the 8th serial clock (*) :
96 * 0 : instruction register,
97 * 1 : data register;
98 * - SC -> Serial Clock line (SDA).
99 * - SD -> Serial Data line (SCK), latched at the rising edge
100 * of each serial clock (*).
101 *
102 * _ _
103 * /CS \ /
104 * \______________________________________________________/
105 * _____ ____ ____ ____ ____ ____ ____ ____ ____ _____
106 * SD \/ D7 \/ D6 \/ D5 \/ D4 \/ D3 \/ D2 \/ D1 \/ D0 \/
107 * _____/\____/\____/\____/\____/\____/\____/\____/\____/\_____
108 *
109 * _____ _ _ _ _ _ _ _ ________
110 * SC \ * \ * \ * \ * \ * \ * \ * \ *
111 * \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/
112 * _ _________________________________________________________
113 * DS \/
114 * _/\_________________________________________________________
115 *
116 */
117
118/*
119 * The only way to do logical operations in an atomic way
120 * on SH1 is using :
121 *
122 * or.b/and.b/tst.b/xor.b #imm,@(r0,gbr)
123 *
124 * but GCC doesn't generate them at all so some assembly
125 * codes are needed here.
126 *
127 * The Global Base Register gbr is expected to be zero
128 * and r0 is the address of one register in the on-chip
129 * peripheral module.
130 *
131 */
132
133static inline void lcd_start (void)
134 /*
135 * Enter a LCD session :
136 *
137 * QI(LCDR) &= ~(LCD_CS|LCD_DS|LCD_SD|LCD_SC);
138 */
139 {
140 asm
141 ("and.b\t%0,@(r0,gbr)"
142 :
143 : /* %0 */ "I"(~(LCD_CS|LCD_DS|LCD_SD|LCD_SC)),
144 /* %1 */ "z"(LCDR));
145 }
146
147static inline void lcd_stop (void)
148 /*
149 * Leave a LCD session :
150 *
151 * QI(LCDR) |= LCD_CS|LCD_RS|LCD_SD|LCD_SC;
152 */
153 {
154 asm
155 ("or.b\t%0,@(r0,gbr)"
156 :
157 : /* %0 */ "I"(LCD_CS|LCD_DS|LCD_SD|LCD_SC),
158 /* %1 */ "z"(LCDR));
159 }
160
161static inline void lcd_byte (int byte,int rs)
162 /*
163 * char j = 0x80;
164 * if (rs)
165 * do
166 * {
167 * QI(LCDR) &= ~(LCD_SC|LCD_SD);
168 * if (j & byte)
169 * QI(LCDR) |= LCD_SD;
170 * QI(LCDR) |= LCD_SC|LCD_DS;
171 * }
172 * while ((unsigned char)j >>= 1);
173 * else
174 * do
175 * {
176 * QI(LCDR) &= ~(LCD_SC|LCD_SD|LCD_DS);
177 * if (j & byte)
178 * QI(LCDR) |= LCD_SD;
179 * QI(LCDR) |= LCD_SC;
180 * }
181 * while ((unsigned char)j >>= 1);
182 */
183 {
184 if (rs > 0)
185 asm
186 ("shll8\t%0\n"
187 "0:\n\t"
188 "and.b\t%2,@(r0,gbr)\n\t"
189 "shll\t%0\n\t"
190 "bf\t1f\n\t"
191 "or.b\t%3,@(r0,gbr)\n"
192 "1:\n\t"
193 "or.b\t%4,@(r0,gbr)\n"
194 "add\t#-1,%1\n\t"
195 "cmp/pl\t%1\n\t"
196 "bt\t0b"
197 :
198 : /* %0 */ "r"(((unsigned)byte)<<16),
199 /* %1 */ "r"(8),
200 /* %2 */ "I"(~(LCD_SC|LCD_SD)),
201 /* %3 */ "I"(LCD_SD),
202 /* %4 */ "I"(LCD_SC|LCD_DS),
203 /* %5 */ "z"(LCDR));
204 else
205 asm
206 ("shll8\t%0\n"
207 "0:\n\t"
208 "and.b\t%2,@(r0,gbr)\n\t"
209 "shll\t%0\n\t"
210 "bf\t1f\n\t"
211 "or.b\t%3,@(r0,gbr)\n"
212 "1:\n\t"
213 "or.b\t%4,@(r0,gbr)\n"
214 "add\t#-1,%1\n\t"
215 "cmp/pl\t%1\n\t"
216 "bt\t0b"
217 :
218 : /* %0 */ "r"(((unsigned)byte)<<16),
219 /* %1 */ "r"(8),
220 /* %2 */ "I"(~(LCD_SC|LCD_DS|LCD_SD)),
221 /* %3 */ "I"(LCD_SD),
222 /* %4 */ "I"(LCD_SC),
223 /* %5 */ "z"(LCDR));
224 }
225
226extern void lcd_data (int data);
227extern void lcd_instruction (int instruction);
228extern void lcd_zero (int length);
229extern void lcd_fill (int data,int length);
230extern void lcd_copy (void *data,int count);
231
232#ifdef JBP
233
234extern void lcd_puts (char const *string);
235extern void lcd_putns (char const *string,int n);
236extern void lcd_putc (int character);
237extern void lcd_puthex (unsigned int value,int digits);
238
239extern void lcd_pattern (int which,char const *pattern,int count);
240
241static inline void lcd_goto (int x,int y)
242 { lcd_instruction (LCD_CURSOR(x,y)); }
243
244#endif
245
246#ifdef JBR
247# error "JBR : FIX ME"
248#endif
249
250/*** BACKLIGHT ***/
251
252static inline void lcd_toggle_backlight (void)
253 { toggle_bit (LCD_BL,PAIOR); }
254
255static inline void lcd_turn_on_backlight (void)
256 { set_bit (LCD_BL,PAIOR); }
257
258static inline void lcd_turn_off_backlight (void)
259 { clear_bit (LCD_BL,PAIOR); }
260
261/*** ICONS ***/
262
263#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-24 18:22:27 +0000