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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2011 by amaury Pouly
*
* Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
* and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
*
* 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 "dma-imx233.h"
void imx233_dma_init(void)
{
/* Enable APHB and APBX */
__REG_CLR(HW_APBH_CTRL0) = __BLOCK_CLKGATE | __BLOCK_SFTRST;
__REG_CLR(HW_APBX_CTRL0) = __BLOCK_CLKGATE | __BLOCK_SFTRST;
}
void imx233_dma_reset_channel(unsigned chan)
{
if(APB_IS_APBX_CHANNEL(chan))
__REG_SET(HW_APBX_CHANNEL_CTRL) =
HW_APBX_CHANNEL_CTRL__RESET_CHANNEL(APB_GET_DMA_CHANNEL(chan));
else
__REG_SET(HW_APBH_CTRL0) =
HW_APBH_CTRL0__RESET_CHANNEL(APB_GET_DMA_CHANNEL(chan));
}
void imx233_dma_clkgate_channel(unsigned chan, bool enable_clock)
{
if(APB_IS_APBX_CHANNEL(chan))
return;
if(enable_clock)
__REG_CLR(HW_APBH_CTRL0) =
HW_APBH_CTRL0__CLKGATE_CHANNEL(APB_GET_DMA_CHANNEL(chan));
else
__REG_SET(HW_APBH_CTRL0) =
HW_APBH_CTRL0__CLKGATE_CHANNEL(APB_GET_DMA_CHANNEL(chan));
}
void imx233_dma_enable_channel_interrupt(unsigned chan, bool enable)
{
volatile uint32_t *ptr;
uint32_t bm;
if(APB_IS_APBX_CHANNEL(chan))
{
ptr = &HW_APBX_CTRL1;
bm = HW_APBX_CTRL1__CHx_CMDCMPLT_IRQ_EN(APB_GET_DMA_CHANNEL(chan));
}
else
{
ptr = &HW_APBH_CTRL1;;
bm = HW_APBH_CTRL1__CHx_CMDCMPLT_IRQ_EN(APB_GET_DMA_CHANNEL(chan));
}
if(enable)
{
__REG_SET(*ptr) = bm;
imx233_dma_clear_channel_interrupt(chan);
}
else
__REG_CLR(*ptr) = bm;
}
void imx233_dma_clear_channel_interrupt(unsigned chan)
{
if(APB_IS_APBX_CHANNEL(chan))
{
__REG_CLR(HW_APBX_CTRL1) =
HW_APBX_CTRL1__CHx_CMDCMPLT_IRQ(APB_GET_DMA_CHANNEL(chan));
__REG_CLR(HW_APBX_CTRL2) =
HW_APBX_CTRL2__CHx_ERROR_IRQ(APB_GET_DMA_CHANNEL(chan));
}
else
{
__REG_CLR(HW_APBH_CTRL1) =
HW_APBH_CTRL1__CHx_CMDCMPLT_IRQ(APB_GET_DMA_CHANNEL(chan));
__REG_CLR(HW_APBH_CTRL2) =
HW_APBH_CTRL2__CHx_ERROR_IRQ(APB_GET_DMA_CHANNEL(chan));
}
}
bool imx233_dma_is_channel_error_irq(unsigned chan)
{
if(APB_IS_APBX_CHANNEL(chan))
return !!(HW_APBX_CTRL2 &
HW_APBX_CTRL2__CHx_ERROR_IRQ(APB_GET_DMA_CHANNEL(chan)));
else
return !!(HW_APBH_CTRL2 &
HW_APBH_CTRL2__CHx_ERROR_IRQ(APB_GET_DMA_CHANNEL(chan)));
}
void imx233_dma_start_command(unsigned chan, struct apb_dma_command_t *cmd)
{
if(APB_IS_APBX_CHANNEL(chan))
{
HW_APBX_CHx_NXTCMDAR(APB_GET_DMA_CHANNEL(chan)) = (uint32_t)cmd;
HW_APBX_CHx_SEMA(APB_GET_DMA_CHANNEL(chan)) = 1;
}
else
{
HW_APBH_CHx_NXTCMDAR(APB_GET_DMA_CHANNEL(chan)) = (uint32_t)cmd;
HW_APBH_CHx_SEMA(APB_GET_DMA_CHANNEL(chan)) = 1;
}
}
void imx233_dma_wait_completion(unsigned chan)
{
volatile uint32_t *sema;
if(APB_IS_APBX_CHANNEL(chan))
sema = &HW_APBX_CHx_SEMA(APB_GET_DMA_CHANNEL(chan));
else
sema = &HW_APBH_CHx_SEMA(APB_GET_DMA_CHANNEL(chan));
while(*sema & HW_APB_CHx_SEMA__PHORE_BM)
;
}
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