/* * (C) Copyright 2006 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * This program 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 of * the License, or (at your option) any later version. * * This program 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., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <common.h> #include <lcd.h> #include <mpc5xxx.h> #ifdef CONFIG_LCD #undef SWAPPED_LCD /* For the previous h/w version */ /* * The name of the device used for communication * with the PSoC. */ #define PSOC_PSC MPC5XXX_PSC2 #define PSOC_BAUD 230400UL #define RTS_ASSERT 1 #define RTS_NEGATE 0 #define CTS_ASSERT 1 #define CTS_NEGATE 0 /* * Dimensions in pixels */ #define LCD_WIDTH 160 #define LCD_HEIGHT 100 /* * Dimensions in bytes */ #define LCD_BUF_SIZE ((LCD_WIDTH*LCD_HEIGHT)>>3) #if LCD_BPP != LCD_MONOCHROME #error "MCC200 support only monochrome displays (1 bpp)!" #endif #define PSOC_RETRIES 10 /* each of PSOC_WAIT_TIME */ #define PSOC_WAIT_TIME 10 /* usec */ DECLARE_GLOBAL_DATA_PTR; /* * LCD information */ vidinfo_t panel_info = { LCD_WIDTH, LCD_HEIGHT, LCD_BPP }; int lcd_line_length; int lcd_color_fg; int lcd_color_bg; /* * Frame buffer memory information */ void *lcd_base; /* Start of framebuffer memory */ void *lcd_console_address; /* Start of console buffer */ short console_col = 0; short console_row = 0; /* * The device we use to communicate with PSoC */ int serial_inited = 0; /* * Exported functions */ void lcd_initcolregs (void); void lcd_ctrl_init (void *lcdbase); void lcd_enable (void); /* * Imported functions to support the PSoC protocol */ extern int serial_init_dev (unsigned long dev_base); extern void serial_setrts_dev (unsigned long dev_base, int s); extern int serial_getcts_dev (unsigned long dev_base); extern void serial_putc_raw_dev(unsigned long dev_base, const char c); /* * Just stubs for our driver, needed for compiling compabilty with * the common LCD driver code. */ void lcd_initcolregs (void) { } void lcd_ctrl_init (void *lcdbase) { } /* * Function sends the contents of the frame-buffer to the LCD */ void lcd_enable (void) { int i, retries, fb_size; if (!serial_inited) { unsigned long baud; baud = gd->baudrate; gd->baudrate = PSOC_BAUD; serial_init_dev(PSOC_PSC); gd->baudrate = baud; serial_setrts_dev (PSOC_PSC, RTS_ASSERT); serial_inited = 1; } /* * Implement PSoC communication protocol: * 1. Assert RTS, wait CTS assertion * 2. Transmit data * 3. Negate RTS, wait CTS negation */ /* 1 */ serial_setrts_dev (PSOC_PSC, RTS_ASSERT); for (retries = PSOC_RETRIES; retries; retries--) { if (serial_getcts_dev(PSOC_PSC) == CTS_ASSERT) break; udelay (PSOC_WAIT_TIME); } if (!retries) { printf ("%s Error: PSoC doesn't respond on " "RTS ASSERT\n", __FUNCTION__); } /* 2 */ fb_size = panel_info.vl_row * (panel_info.vl_col >> 3); #if !defined(SWAPPED_LCD) for (i=0; i<fb_size; i++) { serial_putc_raw_dev (PSOC_PSC, ((char *)lcd_base)[i]); } #else { int x, y, pwidth; char *p = (char *)lcd_base; pwidth = ((panel_info.vl_col+7) >> 3); for (y=0; y<panel_info.vl_row; y++) { i = y * pwidth; for (x=0; x<pwidth; x+=5) { serial_putc_raw_dev (PSOC_PSC, (p[i+x+2]<<4 & 0xF0) | (p[i+x+3]>>4 & 0x0F)); serial_putc_raw_dev (PSOC_PSC, (p[i+x+3]<<4 & 0xF0) | (p[i+x+4]>>4 & 0x0F)); serial_putc_raw_dev (PSOC_PSC, (p[i+x+4]<<4 & 0xF0) | (p[i+x]>>4 & 0x0F)); serial_putc_raw_dev (PSOC_PSC, (p[i+x]<<4 & 0xF0) | (p[i+x+1]>>4 & 0x0F)); serial_putc_raw_dev (PSOC_PSC, (p[i+x+1]<<4 & 0xF0) | (p[i+x+2]>>4 & 0x0F)); } } } #endif /* 3 */ serial_setrts_dev (PSOC_PSC, RTS_NEGATE); for (retries = PSOC_RETRIES; retries; retries--) { if (serial_getcts_dev(PSOC_PSC) == CTS_NEGATE) break; udelay (PSOC_WAIT_TIME); } if (!retries) { printf ("%s Warning: PSoC doesn't respond on " "RTS NEGATE\n", __FUNCTION__); } return; } #ifdef CONFIG_PROGRESSBAR #define FONT_WIDTH 8 /* the same as VIDEO_FONT_WIDTH in video_font.h */ void show_progress (int size, int tot) { int cnt; int i; static int rc = 0; rc += size; cnt = ((LCD_WIDTH/FONT_WIDTH) * rc) / tot; rc -= (cnt * tot) / (LCD_WIDTH/FONT_WIDTH); for (i = 0; i < cnt; i++) { lcd_putc(0xdc); } if (cnt) { lcd_enable(); /* MCC200-specific - send the framebuffer to PSoC */ } } #endif #endif /* CONFIG_LCD */