/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * * Copyright (C) 2010 Marcin Bukat * * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include "config.h" #include "system.h" #include "kernel.h" #include "lcd.h" /*** definitions ***/ /* TOMATO LSI 0350 - definitions and slightly tweaked functions * taken from lcd-remote-iaudio.c */ #define LCD_SET_DUTY_RATIO 0x48 #define LCD_SELECT_ADC 0xa0 #define LCD_SELECT_SHL 0xc0 #define LCD_SET_COM0 0x44 #define LCD_OSC_ON 0xab #define LCD_SELECT_DCDC 0x64 #define LCD_SELECT_RES 0x20 #define LCD_SET_VOLUME 0x81 #define LCD_SET_BIAS 0x50 #define LCD_CONTROL_POWER 0x28 #define LCD_DISPLAY_ON 0xae #define LCD_SET_INITLINE 0x40 #define LCD_SET_COLUMN 0x10 #define LCD_SET_PAGE 0xb0 #define LCD_SET_GRAY 0x88 #define LCD_SET_PWM_FRC 0x90 #define LCD_SET_POWER_SAVE 0xa8 #define LCD_REVERSE 0xa6 #define LCD_RESET 0xe2 /* cached settings */ static bool cached_invert = false; static bool cached_flip = false; static int cached_contrast = DEFAULT_CONTRAST_SETTING; static struct mutex lcd_mtx; /* The update functions use DMA and yield */ volatile unsigned char page IBSS_ATTR; unsigned char column IBSS_ATTR; unsigned int dma_len IBSS_ATTR; volatile unsigned long dma_count IBSS_ATTR; /*** hardware configuration ***/ int lcd_default_contrast(void) { return DEFAULT_CONTRAST_SETTING; } void lcd_powersave(bool on) { if (on) /* enter power saving mode * this turns off lcd without controller reset * probably ~1mA saving */ lcd_write_command(LCD_SET_POWER_SAVE | 1); else /* leave lcd power saving mode * no need to reset and initialize controller */ lcd_write_command(LCD_SET_POWER_SAVE | 0); } void lcd_set_contrast(int val) { if (val < MIN_CONTRAST_SETTING) val = MIN_CONTRAST_SETTING; else if (val > MAX_CONTRAST_SETTING) val = MAX_CONTRAST_SETTING; cached_contrast = val; lcd_write_command_e(LCD_SET_VOLUME, val); } void lcd_set_invert_display(bool yesno) { cached_invert = yesno; lcd_write_command(LCD_REVERSE | yesno); } /* turn the display upside down (call lcd_update() afterwards) */ void lcd_set_flip(bool yesno) { cached_flip = yesno; if(yesno) { lcd_write_command(LCD_SELECT_ADC | 1); lcd_write_command(LCD_SELECT_SHL | 0); lcd_write_command_e(LCD_SET_COM0, 0); } else { lcd_write_command(LCD_SELECT_ADC | 0); lcd_write_command(LCD_SELECT_SHL | 8); lcd_write_command_e(LCD_SET_COM0, 0); } } void lcd_shutdown(void) { /* Set power save -> Power OFF (VDD - VSS) .. that's it */ lcd_write_command(LCD_SET_POWER_SAVE | 1); } void lcd_init_device(void) { and_l(~0x00000800, &GPIO_FUNCTION); /* CS3 line */ /* LCD Reset GPO34 */ or_l(0x00000004, &GPIO1_ENABLE); /* set as output */ or_l(0x00000004, &GPIO1_FUNCTION); /* switch to secondary function - GPIO */ and_l(~0x00000004, &GPIO1_OUT); /* RESET low */ sleep(1); /* delay at least 1000 ns */ or_l(0x00000004, &GPIO1_OUT); /* RESET high */ sleep(1); /* parameters setup taken from original firmware */ lcd_write_command(LCD_RESET); lcd_write_command_e(LCD_SET_DUTY_RATIO,0x80); /* 1/128 */ lcd_write_command(LCD_OSC_ON); lcd_write_command(LCD_SELECT_DCDC | 3); /* DC/DC 6xboost */ lcd_write_command(LCD_SELECT_RES | 7); /* Regulator resistor: 7.2 */ lcd_write_command(LCD_SET_BIAS | 6); /* 1/11 */ lcd_write_command(LCD_SET_PWM_FRC | 6); /* 3FRC + 12PWM */ lcd_write_command_e(LCD_SET_GRAY | 0, 0x00); lcd_write_command_e(LCD_SET_GRAY | 1, 0x00); lcd_write_command_e(LCD_SET_GRAY | 2, 0x0c); lcd_write_command_e(LCD_SET_GRAY | 3, 0x00); lcd_write_command_e(LCD_SET_GRAY | 4, 0xc4); lcd_write_command_e(LCD_SET_GRAY | 5, 0x00); lcd_write_command_e(LCD_SET_GRAY | 6, 0xcc); lcd_write_command_e(LCD_SET_GRAY | 7, 0x00); lcd_write_command(LCD_CONTROL_POWER | 7); /* All circuits ON */ lcd_write_command(LCD_DISPLAY_ON | 1); /* display on */ lcd_set_flip(cached_flip); lcd_set_contrast(cached_contrast); lcd_set_invert_display(cached_invert); /* Configure DMA3 */ DAR3 = 0xf0000002; DSR3 = 1; DIVR3 = 57; /* DMA3 is mapped into vector 57 in system.c */ ICR9 = (6 << 2); /* Enable DMA3 interrupt at level 6, priority 0 */ coldfire_imr_mod(0, 1 << 17); mutex_init(&lcd_mtx); lcd_update(); } /* LCD DMA ISR */ void DMA3(void) __attribute__ ((interrupt_handler, section(".icode"))); void DMA3(void) { DSR3 = 1; if (--dma_count > 0) { /* Setup write address in lcd controller ram*/ lcd_write_command(LCD_SET_PAGE | ++page); lcd_write_command_e(LCD_SET_COLUMN | ((column >> 4) & 0xf), column & 0x0f); SAR3 = (unsigned long)FBADDR(column,page); BCR3 = dma_len; DCR3 = DMA_INT | DMA_AA | DMA_BWC(1) | DMA_SINC | DMA_SSIZE(DMA_SIZE_LINE) | DMA_DSIZE(DMA_SIZE_BYTE) | DMA_START; } } /* Update the display. This must be called after all other LCD functions that change the display. */ void lcd_update(void) ICODE_ATTR; void lcd_update(void) { mutex_lock(&lcd_mtx); /* Setup initial address in lcd controller */ lcd_write_command(LCD_SET_PAGE | 0); lcd_write_command_e(LCD_SET_COLUMN, 0); /* Initial lcd ram address */ page = 0; column = 0; /* Number of pages to address */ dma_count = LCD_FBHEIGHT; /* Transfer size in bytes to the given page */ dma_len = LCD_WIDTH*2; /* Initialize DMA transfer */ SAR3 = (unsigned long)FBADDR(0,0); BCR3 = LCD_WIDTH*2; DCR3 = DMA_INT | DMA_AA | DMA_BWC(1) | DMA_SINC | DMA_SSIZE(DMA_SIZE_LINE) | DMA_DSIZE(DMA_SIZE_BYTE) | DMA_START; while (dma_count > 0) yield(); mutex_unlock(&lcd_mtx); } /* Update a fraction of the display. */ void lcd_update_rect(int, int, int, int) ICODE_ATTR; void lcd_update_rect(int x, int y, int width, int height) { int ymax; /* The Y coordinates have to work on even 8 pixel rows */ ymax = (y + height-1) >> 3; y >>= 3; if (x + width > LCD_WIDTH) width = LCD_WIDTH - x; if (width <= 0) return; /* nothing left to do, 0 is harmful to lcd_write_data() */ mutex_lock(&lcd_mtx); if (ymax >= LCD_FBHEIGHT) ymax = LCD_FBHEIGHT-1; /* Initial lcd ram address*/ lcd_write_command(LCD_SET_PAGE | y ); lcd_write_command_e(LCD_SET_COLUMN | ((x >> 4) & 0xf), x & 0x0f); page = y; column = x; dma_len = width*2; dma_count = ymax - y + 1; /* Initialize DMA transfer */ SAR3 = (unsigned long)FBADDR(column,page); BCR3 = dma_len; DCR3 = DMA_INT | DMA_AA | DMA_BWC(1) | DMA_SINC | DMA_SSIZE(DMA_SIZE_LINE) | DMA_DSIZE(DMA_SIZE_BYTE) | DMA_START; while (dma_count > 0) yield(); mutex_unlock(&lcd_mtx); } /* Helper function. */ void lcd_mono_data(const unsigned char *data, int count); /* Performance function that works with an external buffer note that by and bheight are in 8-pixel units! */ void lcd_blit_mono(const unsigned char *data, int x, int by, int width, int bheight, int stride) { while (bheight--) { lcd_write_command(LCD_SET_PAGE | (by & 0xf)); lcd_write_command_e(LCD_SET_COLUMN | ((x >> 4) & 0xf), x & 0xf); lcd_mono_data(data, width); data += stride; by++; } } /* Helper function for lcd_grey_phase_blit(). */ void lcd_grey_data(unsigned char *values, unsigned char *phases, int count); /* Performance function that works with an external buffer note that by and bheight are in 8-pixel units! */ void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases, int x, int by, int width, int bheight, int stride) { stride <<= 3; /* 8 pixels per block */ while (bheight--) { lcd_write_command(LCD_SET_PAGE | (by & 0xf)); lcd_write_command_e(LCD_SET_COLUMN | ((x >> 4) & 0xf), x & 0xf); lcd_grey_data(values, phases, width); values += stride; phases += stride; by++; } }