259 lines
7.9 KiB
C
259 lines
7.9 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (c) 2013 by Amaury Pouly
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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
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <sys/types.h> /* off_t */
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#include <string.h>
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#include "cpu.h"
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#include "system.h"
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#include "backlight-target.h"
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#include "lcd.h"
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#include "lcdif-imx233.h"
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#include "clkctrl-imx233.h"
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#include "pinctrl-imx233.h"
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#include "logf.h"
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#ifdef HAVE_LCD_ENABLE
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static bool lcd_on;
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#endif
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static void lcd_write_reg(uint8_t reg, uint8_t data)
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{
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imx233_lcdif_wait_ready();
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imx233_lcdif_set_data_swizzle(0);
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imx233_lcdif_set_word_length(8);
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imx233_lcdif_pio_send(false, 1, ®);
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if(reg != 0x22)
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imx233_lcdif_pio_send(true, 1, &data);
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}
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static void lcd_init_seq(void)
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{
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lcd_write_reg(0xea, 0);
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lcd_write_reg(0xeb, 0x20);
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lcd_write_reg(0xec, 0xc);
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lcd_write_reg(0xed, 0xc4);
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lcd_write_reg(0xe8, 0x38);
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lcd_write_reg(0xe9, 0xe);
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lcd_write_reg(0xf1, 1);
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lcd_write_reg(0xf2, 8);
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lcd_write_reg(0x2e, 0x86);
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lcd_write_reg(0x29, 0xff);
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lcd_write_reg(0xe4, 1);
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lcd_write_reg(0xe5, 0x20);
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lcd_write_reg(0xe7, 1);
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lcd_write_reg(0x40, 0);
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lcd_write_reg(0x41, 0);
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lcd_write_reg(0x42, 0);
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lcd_write_reg(0x43, 0x14);
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lcd_write_reg(0x44, 0x14);
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lcd_write_reg(0x45, 0x28);
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lcd_write_reg(0x46, 0x11);
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lcd_write_reg(0x47, 0x57);
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lcd_write_reg(0x48, 5);
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lcd_write_reg(0x49, 0x16);
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lcd_write_reg(0x4a, 0x19);
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lcd_write_reg(0x4b, 0x1a);
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lcd_write_reg(0x4c, 0x1a);
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lcd_write_reg(0x50, 0x17);
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lcd_write_reg(0x51, 0x2b);
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lcd_write_reg(0x52, 0x2b);
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lcd_write_reg(0x53, 0x3f);
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lcd_write_reg(0x54, 0x3f);
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lcd_write_reg(0x55, 0x3f);
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lcd_write_reg(0x56, 0x28);
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lcd_write_reg(0x57, 0x6e);
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lcd_write_reg(0x58, 5);
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lcd_write_reg(0x59, 5);
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lcd_write_reg(0x5a, 6);
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lcd_write_reg(0x5b, 9);
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lcd_write_reg(0x5c, 0x1a);
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lcd_write_reg(0x5d, 0xcc);
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lcd_write_reg(0x1b, 0x1b);
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lcd_write_reg(0x1A, 1);
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lcd_write_reg(0x24, 0x2f); // something special here
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lcd_write_reg(0x25, 0x57); // something special here
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lcd_write_reg(0x23, 0x8a);
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lcd_write_reg(0x2f, 1);
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lcd_write_reg(0x60, 0);
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lcd_write_reg(0x16, 8);
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lcd_write_reg(0x18, 0x36); // something special here
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lcd_write_reg(0x19, 1);
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udelay(5000);
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lcd_write_reg(1, 0);
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lcd_write_reg(0x1f, 0x88);
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udelay(5000);
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lcd_write_reg(0x1f, 0x80);
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udelay(5000);
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lcd_write_reg(0x1f, 0x90);
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udelay(5000);
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lcd_write_reg(0x1f, 0xD0);
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udelay(5000);
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lcd_write_reg(0x17, 6);
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lcd_write_reg(0x37, 0);
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lcd_write_reg(0x28, 0x38);
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udelay(40000);
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lcd_write_reg(0x28, 0x3c);
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}
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void lcd_init_device(void)
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{
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/* the LCD seems to work at 24Mhz, so use the xtal clock with no divider */
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imx233_clkctrl_enable(CLK_PIX, false);
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imx233_clkctrl_set_div(CLK_PIX, 1);
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imx233_clkctrl_set_bypass(CLK_PIX, true); /* use XTAL */
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imx233_clkctrl_enable(CLK_PIX, true);
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imx233_lcdif_init();
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imx233_lcdif_set_lcd_databus_width(8);
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imx233_lcdif_set_timings(1, 1, 1, 1);
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imx233_lcdif_enable_underflow_recover(true);
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imx233_lcdif_setup_system_pins(8);
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imx233_lcdif_set_byte_packing_format(0xf); /* two pixels per 32-bit word */
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// reset device
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imx233_lcdif_reset_lcd(true);
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mdelay(10);
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imx233_lcdif_reset_lcd(false);
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mdelay(10);
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imx233_lcdif_reset_lcd(true);
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mdelay(150);
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lcd_init_seq();
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#ifdef HAVE_LCD_ENABLE
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lcd_on = true;
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#endif
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}
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#ifdef HAVE_LCD_ENABLE
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bool lcd_active(void)
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{
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return lcd_on;
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}
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static void lcd_enable_seq(bool enable)
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{
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if(!enable)
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{
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lcd_write_reg(0x1f, 0xd1);
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lcd_write_reg(1, 0x40);
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lcd_write_reg(1, 0xc0);
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lcd_write_reg(0x19, 1);
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}
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else
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{
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lcd_write_reg(0x19, 0x81);
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udelay(5000);
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lcd_write_reg(1, 0x40);
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udelay(20000);
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lcd_write_reg(1, 0);
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lcd_write_reg(0x1f, 0xd0);
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}
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}
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void lcd_enable(bool enable)
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{
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if(lcd_on == enable)
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return;
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lcd_on = enable;
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if(enable)
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imx233_lcdif_enable(true);
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lcd_enable_seq(enable);
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if(!enable)
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imx233_lcdif_enable(false);
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else
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send_event(LCD_EVENT_ACTIVATION, NULL);
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}
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#endif
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void lcd_update(void)
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{
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lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
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}
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void lcd_update_rect(int x, int y, int w, int h)
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{
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#ifdef HAVE_LCD_ENABLE
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if(!lcd_on)
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return;
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#endif
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/* make sure the rectangle is included in the screen */
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x = MIN(x, LCD_WIDTH);
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y = MIN(y, LCD_HEIGHT);
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w = MIN(w, LCD_WIDTH - x);
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h = MIN(h, LCD_HEIGHT - y);
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imx233_lcdif_wait_ready();
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lcd_write_reg(2, x >> 8);
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lcd_write_reg(3, x & 0xff);
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lcd_write_reg(4, (x + w - 1) >> 8);
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lcd_write_reg(5, (x + w - 1) & 0xff);
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lcd_write_reg(6, y >> 8);
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lcd_write_reg(7, y & 0xff);
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lcd_write_reg(8, (y + h - 1) >> 8);
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lcd_write_reg(9, (y + h - 1) & 0xff);
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lcd_write_reg(0x22, 0);
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imx233_lcdif_wait_ready();
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imx233_lcdif_set_word_length(16);
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/* there are two cases here:
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* - either width = LCD_WIDTH and we can directly memcopy a part of lcd_framebuffer to FRAME
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* and send it
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* - either width != LCD_WIDTH and we have to build a contiguous copy of the rectangular area
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* into FRAME before sending it (which is slower and doesn't use the hardware)
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* In all cases, FRAME just acts as a temporary buffer.
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* NOTE It's more interesting to do a copy to FRAME in all cases since in system mode
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* the clock runs at 24MHz which provides barely 10MB/s bandwidth compared to >100MB/s
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* for memcopy operations
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*/
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if(w == LCD_WIDTH)
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{
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memcpy((void *)FRAME, FBADDR(x,y), w * h * sizeof(fb_data));
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}
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else
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{
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for(int i = 0; i < h; i++)
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memcpy((fb_data *)FRAME + i * w, FBADDR(x,y + i), w * sizeof(fb_data));
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}
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/* WARNING The LCDIF has a limitation on the vertical count ! In 16-bit packed mode
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* (which we used, ie 16-bit per pixel, 2 pixels per 32-bit words), the v_count
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* field must be a multiple of 2. Furthermore, it seems the lcd controller doesn't
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* really like when both w and h are even, probably because the writes to the GRAM
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* are done on several words and the controller requires dummy writes.
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* The workaround is to always make sure that we send a number of pixels which is
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* a multiple of 4 so that both the lcdif and the controller are happy. If any
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* of w or h is odd, we will send a copy of the first pixels as dummy writes. We will
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* send at most 3 bytes. We then send (w * h + 3) / 4 x 4 bytes.
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*/
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if(w % 2 == 1 || h % 2 == 1)
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{
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/* copy three pixel after the last one */
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for(int i = 0; i < 3; i++)
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*((fb_data *)FRAME + w * h + i) = *((fb_data *)FRAME + i);
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/* WARNING we need to update w and h to reflect the pixel count BUT it
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* has no relation to w * h (it can even be 2 * prime). Hopefully, w <= 240 and
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* h <= 320 so w * h <= 76800 and (w * h + 3) / 4 <= 38400 which fits into
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* a 16-bit integer (horizontal count). */
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h = (w * h + 3) / 4;
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w = 4;
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}
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imx233_lcdif_dma_send((void *)FRAME_PHYS_ADDR, w, h);
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}
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