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Wolfgang Denke8143e72006-08-30 23:09:00 +02001/*
2 * (C) Copyright 2006
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of
8 * the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
18 * MA 02111-1307 USA
19 */
20
21#include <common.h>
22#include <lcd.h>
23#include <mpc5xxx.h>
24
25#ifdef CONFIG_LCD
26
Sergei Poselenov638dd142007-02-27 12:40:16 +030027#undef SWAPPED_LCD /* For the previous h/w version */
Wolfgang Denke8143e72006-08-30 23:09:00 +020028/*
29 * The name of the device used for communication
30 * with the PSoC.
31 */
32#define PSOC_PSC MPC5XXX_PSC2
Sergei Poselenov638dd142007-02-27 12:40:16 +030033#define PSOC_BAUD 230400UL
Wolfgang Denke8143e72006-08-30 23:09:00 +020034
35#define RTS_ASSERT 1
36#define RTS_NEGATE 0
37#define CTS_ASSERT 1
38#define CTS_NEGATE 0
39
40/*
41 * Dimensions in pixels
42 */
43#define LCD_WIDTH 160
44#define LCD_HEIGHT 100
45
46/*
47 * Dimensions in bytes
48 */
49#define LCD_BUF_SIZE ((LCD_WIDTH*LCD_HEIGHT)>>3)
50
51#if LCD_BPP != LCD_MONOCHROME
52#error "MCC200 support only monochrome displays (1 bpp)!"
53#endif
54
55#define PSOC_RETRIES 10 /* each of PSOC_WAIT_TIME */
56#define PSOC_WAIT_TIME 10 /* usec */
57
58DECLARE_GLOBAL_DATA_PTR;
59
60/*
61 * LCD information
62 */
63vidinfo_t panel_info = {
64 LCD_WIDTH, LCD_HEIGHT, LCD_BPP
65};
66
67int lcd_line_length;
68
69int lcd_color_fg;
70int lcd_color_bg;
71
72/*
73 * Frame buffer memory information
74 */
75void *lcd_base; /* Start of framebuffer memory */
76void *lcd_console_address; /* Start of console buffer */
77
78short console_col = 0;
79short console_row = 0;
80
81/*
82 * The device we use to communicate with PSoC
83 */
84int serial_inited = 0;
85
86/*
87 * Exported functions
88 */
89void lcd_initcolregs (void);
90void lcd_ctrl_init (void *lcdbase);
91void lcd_enable (void);
92
93/*
94 * Imported functions to support the PSoC protocol
95 */
96extern int serial_init_dev (unsigned long dev_base);
97extern void serial_setrts_dev (unsigned long dev_base, int s);
98extern int serial_getcts_dev (unsigned long dev_base);
99extern void serial_putc_raw_dev(unsigned long dev_base, const char c);
100
101/*
102 * Just stubs for our driver, needed for compiling compabilty with
103 * the common LCD driver code.
104 */
105void lcd_initcolregs (void)
106{
107}
108
109void lcd_ctrl_init (void *lcdbase)
110{
111}
112
113/*
114 * Function sends the contents of the frame-buffer to the LCD
115 */
116void lcd_enable (void)
117{
118 int i, retries, fb_size;
119
120 if (!serial_inited) {
121 unsigned long baud;
122
123 baud = gd->baudrate;
124 gd->baudrate = PSOC_BAUD;
125 serial_init_dev(PSOC_PSC);
126 gd->baudrate = baud;
127 serial_setrts_dev (PSOC_PSC, RTS_ASSERT);
128 serial_inited = 1;
129 }
130
131 /*
132 * Implement PSoC communication protocol:
133 * 1. Assert RTS, wait CTS assertion
134 * 2. Transmit data
135 * 3. Negate RTS, wait CTS negation
136 */
137
138 /* 1 */
139 serial_setrts_dev (PSOC_PSC, RTS_ASSERT);
140 for (retries = PSOC_RETRIES; retries; retries--) {
141 if (serial_getcts_dev(PSOC_PSC) == CTS_ASSERT)
142 break;
143 udelay (PSOC_WAIT_TIME);
144 }
145 if (!retries) {
146 printf ("%s Error: PSoC doesn't respond on "
147 "RTS ASSERT\n", __FUNCTION__);
148 }
149
150 /* 2 */
151 fb_size = panel_info.vl_row * (panel_info.vl_col >> 3);
152
153#if !defined(SWAPPED_LCD)
154 for (i=0; i<fb_size; i++) {
155 serial_putc_raw_dev (PSOC_PSC, ((char *)lcd_base)[i]);
156 }
157#else
158 {
159 int x, y, pwidth;
160 char *p = (char *)lcd_base;
161
162 pwidth = ((panel_info.vl_col+7) >> 3);
163 for (y=0; y<panel_info.vl_row; y++) {
164 i = y * pwidth;
165 for (x=0; x<pwidth; x+=5) {
166 serial_putc_raw_dev (PSOC_PSC, (p[i+x+2]<<4 & 0xF0) | (p[i+x+3]>>4 & 0x0F));
167 serial_putc_raw_dev (PSOC_PSC, (p[i+x+3]<<4 & 0xF0) | (p[i+x+4]>>4 & 0x0F));
168 serial_putc_raw_dev (PSOC_PSC, (p[i+x+4]<<4 & 0xF0) | (p[i+x]>>4 & 0x0F));
169 serial_putc_raw_dev (PSOC_PSC, (p[i+x]<<4 & 0xF0) | (p[i+x+1]>>4 & 0x0F));
170 serial_putc_raw_dev (PSOC_PSC, (p[i+x+1]<<4 & 0xF0) | (p[i+x+2]>>4 & 0x0F));
171 }
172 }
173 }
174#endif
175
176 /* 3 */
177 serial_setrts_dev (PSOC_PSC, RTS_NEGATE);
178 for (retries = PSOC_RETRIES; retries; retries--) {
179 if (serial_getcts_dev(PSOC_PSC) == CTS_NEGATE)
180 break;
181 udelay (PSOC_WAIT_TIME);
182 }
Wolfgang Denke8143e72006-08-30 23:09:00 +0200183
184 return;
185}
Sergei Poselenov638dd142007-02-27 12:40:16 +0300186#ifdef CONFIG_PROGRESSBAR
187
188#define FONT_WIDTH 8 /* the same as VIDEO_FONT_WIDTH in video_font.h */
189void show_progress (int size, int tot)
190{
191 int cnt;
192 int i;
193 static int rc = 0;
194
195 rc += size;
196
197 cnt = ((LCD_WIDTH/FONT_WIDTH) * rc) / tot;
198
199 rc -= (cnt * tot) / (LCD_WIDTH/FONT_WIDTH);
200
201 for (i = 0; i < cnt; i++) {
202 lcd_putc(0xdc);
203 }
204
205 if (cnt) {
206 lcd_enable(); /* MCC200-specific - send the framebuffer to PSoC */
207 }
208}
209
210#endif
Wolfgang Denke8143e72006-08-30 23:09:00 +0200211#endif /* CONFIG_LCD */