212 lines
4.7 KiB
C
212 lines
4.7 KiB
C
/*
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* (C) Copyright 2006
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <lcd.h>
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#include <mpc5xxx.h>
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#ifdef CONFIG_LCD
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#undef SWAPPED_LCD /* For the previous h/w version */
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/*
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* The name of the device used for communication
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* with the PSoC.
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*/
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#define PSOC_PSC MPC5XXX_PSC2
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#define PSOC_BAUD 230400UL
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#define RTS_ASSERT 1
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#define RTS_NEGATE 0
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#define CTS_ASSERT 1
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#define CTS_NEGATE 0
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/*
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* Dimensions in pixels
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*/
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#define LCD_WIDTH 160
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#define LCD_HEIGHT 100
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/*
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* Dimensions in bytes
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*/
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#define LCD_BUF_SIZE ((LCD_WIDTH*LCD_HEIGHT)>>3)
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#if LCD_BPP != LCD_MONOCHROME
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#error "MCC200 support only monochrome displays (1 bpp)!"
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#endif
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#define PSOC_RETRIES 10 /* each of PSOC_WAIT_TIME */
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#define PSOC_WAIT_TIME 10 /* usec */
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* LCD information
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*/
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vidinfo_t panel_info = {
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LCD_WIDTH, LCD_HEIGHT, LCD_BPP
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};
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int lcd_line_length;
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int lcd_color_fg;
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int lcd_color_bg;
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/*
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* Frame buffer memory information
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*/
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void *lcd_base; /* Start of framebuffer memory */
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void *lcd_console_address; /* Start of console buffer */
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short console_col = 0;
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short console_row = 0;
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/*
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* The device we use to communicate with PSoC
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*/
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int serial_inited = 0;
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/*
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* Exported functions
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*/
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void lcd_initcolregs (void);
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void lcd_ctrl_init (void *lcdbase);
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void lcd_enable (void);
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/*
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* Imported functions to support the PSoC protocol
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*/
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extern int serial_init_dev (unsigned long dev_base);
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extern void serial_setrts_dev (unsigned long dev_base, int s);
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extern int serial_getcts_dev (unsigned long dev_base);
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extern void serial_putc_raw_dev(unsigned long dev_base, const char c);
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/*
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* Just stubs for our driver, needed for compiling compabilty with
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* the common LCD driver code.
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*/
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void lcd_initcolregs (void)
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{
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}
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void lcd_ctrl_init (void *lcdbase)
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{
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}
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/*
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* Function sends the contents of the frame-buffer to the LCD
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*/
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void lcd_enable (void)
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{
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int i, retries, fb_size;
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if (!serial_inited) {
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unsigned long baud;
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baud = gd->baudrate;
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gd->baudrate = PSOC_BAUD;
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serial_init_dev(PSOC_PSC);
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gd->baudrate = baud;
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serial_setrts_dev (PSOC_PSC, RTS_ASSERT);
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serial_inited = 1;
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}
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/*
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* Implement PSoC communication protocol:
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* 1. Assert RTS, wait CTS assertion
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* 2. Transmit data
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* 3. Negate RTS, wait CTS negation
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*/
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/* 1 */
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serial_setrts_dev (PSOC_PSC, RTS_ASSERT);
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for (retries = PSOC_RETRIES; retries; retries--) {
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if (serial_getcts_dev(PSOC_PSC) == CTS_ASSERT)
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break;
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udelay (PSOC_WAIT_TIME);
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}
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if (!retries) {
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printf ("%s Error: PSoC doesn't respond on "
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"RTS ASSERT\n", __FUNCTION__);
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}
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/* 2 */
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fb_size = panel_info.vl_row * (panel_info.vl_col >> 3);
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#if !defined(SWAPPED_LCD)
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for (i=0; i<fb_size; i++) {
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serial_putc_raw_dev (PSOC_PSC, ((char *)lcd_base)[i]);
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}
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#else
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{
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int x, y, pwidth;
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char *p = (char *)lcd_base;
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pwidth = ((panel_info.vl_col+7) >> 3);
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for (y=0; y<panel_info.vl_row; y++) {
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i = y * pwidth;
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for (x=0; x<pwidth; x+=5) {
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serial_putc_raw_dev (PSOC_PSC, (p[i+x+2]<<4 & 0xF0) | (p[i+x+3]>>4 & 0x0F));
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serial_putc_raw_dev (PSOC_PSC, (p[i+x+3]<<4 & 0xF0) | (p[i+x+4]>>4 & 0x0F));
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serial_putc_raw_dev (PSOC_PSC, (p[i+x+4]<<4 & 0xF0) | (p[i+x]>>4 & 0x0F));
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serial_putc_raw_dev (PSOC_PSC, (p[i+x]<<4 & 0xF0) | (p[i+x+1]>>4 & 0x0F));
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serial_putc_raw_dev (PSOC_PSC, (p[i+x+1]<<4 & 0xF0) | (p[i+x+2]>>4 & 0x0F));
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}
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}
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}
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#endif
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/* 3 */
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serial_setrts_dev (PSOC_PSC, RTS_NEGATE);
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for (retries = PSOC_RETRIES; retries; retries--) {
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if (serial_getcts_dev(PSOC_PSC) == CTS_NEGATE)
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break;
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udelay (PSOC_WAIT_TIME);
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}
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return;
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}
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#ifdef CONFIG_PROGRESSBAR
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#define FONT_WIDTH 8 /* the same as VIDEO_FONT_WIDTH in video_font.h */
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void show_progress (int size, int tot)
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{
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int cnt;
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int i;
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static int rc = 0;
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rc += size;
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cnt = ((LCD_WIDTH/FONT_WIDTH) * rc) / tot;
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rc -= (cnt * tot) / (LCD_WIDTH/FONT_WIDTH);
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for (i = 0; i < cnt; i++) {
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lcd_putc(0xdc);
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}
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if (cnt) {
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lcd_enable(); /* MCC200-specific - send the framebuffer to PSoC */
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}
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}
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#endif
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#endif /* CONFIG_LCD */
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