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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (c) 2011 by Amaury Pouly
*
* 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 "lcdif-imx233.h"
static unsigned lcdif_word_length = 0;
static unsigned lcdif_byte_packing = 0;
void imx233_lcdif_enable_bus_master(bool enable)
{
if(enable)
__REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__LCDIF_MASTER;
else
__REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__LCDIF_MASTER;
}
void imx233_lcdif_enable(bool enable)
{
if(enable)
__REG_CLR(HW_LCDIF_CTRL) = __BLOCK_CLKGATE;
else
__REG_SET(HW_LCDIF_CTRL) = __BLOCK_CLKGATE;
}
void imx233_lcdif_reset(void)
{
imx233_reset_block(&HW_LCDIF_CTRL);
}
void imx233_lcdif_set_timings(unsigned data_setup, unsigned data_hold,
unsigned cmd_setup, unsigned cmd_hold)
{
HW_LCDIF_TIMING = (data_setup << HW_LCDIF_TIMING__DATA_SETUP_BP) |
(data_hold << HW_LCDIF_TIMING__DATA_HOLD_BP) |
(cmd_setup << HW_LCDIF_TIMING__CMD_SETUP_BP) |
(cmd_hold << HW_LCDIF_TIMING__CMD_HOLD_BP);
}
void imx233_lcdif_set_lcd_databus_width(unsigned width)
{
__REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__LCD_DATABUS_WIDTH_BM;
__REG_SET(HW_LCDIF_CTRL) = width;
}
void imx233_lcdif_set_word_length(unsigned word_length)
{
__REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__WORD_LENGTH_BM;
__REG_SET(HW_LCDIF_CTRL) = word_length;
lcdif_word_length = word_length;
}
unsigned imx233_lcdif_enable_irqs(unsigned irq_bm)
{
unsigned old_msk = __XTRACT(HW_LCDIF_CTRL1, IRQ_EN);
/* clear irq status */
__REG_CLR(HW_LCDIF_CTRL1) = irq_bm << HW_LCDIF_CTRL1__IRQ_BP;
/* disable irqs */
__REG_CLR(HW_LCDIF_CTRL1) = HW_LCDIF_CTRL1__IRQ_EN_BM;
/* enable irqs */
__REG_SET(HW_LCDIF_CTRL1) = irq_bm << HW_LCDIF_CTRL1__IRQ_EN_BP;
return old_msk;
}
void imx233_lcdif_set_byte_packing_format(unsigned byte_packing)
{
__REG_CLR(HW_LCDIF_CTRL1) = HW_LCDIF_CTRL1__BYTE_PACKING_FORMAT_BM;
__REG_SET(HW_LCDIF_CTRL1) = byte_packing << HW_LCDIF_CTRL1__BYTE_PACKING_FORMAT_BP;
lcdif_byte_packing = byte_packing;
}
void imx233_lcdif_set_data_format(bool data_fmt_16, bool data_fmt_18, bool data_fmt_24)
{
if(data_fmt_16)
__REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_FORMAT_16_BIT;
else
__REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_FORMAT_16_BIT;
if(data_fmt_18)
__REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_FORMAT_18_BIT;
else
__REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_FORMAT_18_BIT;
if(data_fmt_24)
__REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_FORMAT_24_BIT;
else
__REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_FORMAT_24_BIT;
}
void imx233_lcdif_wait_ready(void)
{
while(HW_LCDIF_CTRL & HW_LCDIF_CTRL__RUN);
}
void imx233_lcdif_pio_send(bool data_mode, unsigned len, uint32_t *buf)
{
unsigned max_xfer_size = 0xffff;
if(len == 0)
return;
if(lcdif_word_length == HW_LCDIF_CTRL__WORD_LENGTH_16_BIT)
max_xfer_size = 0x1fffe;
imx233_lcdif_wait_ready();
unsigned msk = imx233_lcdif_enable_irqs(0);
imx233_lcdif_enable_bus_master(false);
do
{
unsigned burst = MIN(len, max_xfer_size);
len -= burst;
unsigned count = burst;
if(lcdif_word_length != HW_LCDIF_CTRL__WORD_LENGTH_8_BIT)
{
if(burst & 1)
burst++;
count = burst / 2;
}
else
count = burst;
HW_LCDIF_TRANSFER_COUNT = 0;
HW_LCDIF_TRANSFER_COUNT = 0x10000 | count;
__REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_SELECT | HW_LCDIF_CTRL__RUN;
if(data_mode)
__REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_SELECT;
__REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__RUN;
burst = (burst + 3) / 4;
while(burst-- > 0)
{
while(HW_LCDIF_STAT & HW_LCDIF_STAT__LFIFO_FULL);
HW_LCDIF_DATA = *buf++;
}
while(HW_LCDIF_CTRL & HW_LCDIF_CTRL__RUN);
}while(len > 0);
imx233_lcdif_enable_bus_master(true);
imx233_lcdif_enable_irqs(msk);
}
void imx233_lcdif_dma_send(void *buf, unsigned width, unsigned height)
{
HW_LCDIF_CUR_BUF = (uint32_t)buf;
HW_LCDIF_TRANSFER_COUNT = 0;
HW_LCDIF_TRANSFER_COUNT = (height << 16) | width;
__REG_CLR(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__RUN;
__REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__DATA_SELECT;
__REG_SET(HW_LCDIF_CTRL) = HW_LCDIF_CTRL__RUN;
}
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