2cf3313382
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30010 a1c6a512-1295-4272-9138-f99709370657
133 lines
4 KiB
C
133 lines
4 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) 2011 by amaury Pouly
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*
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* Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
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* and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
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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 "config.h"
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#include "system.h"
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#include "dma-imx233.h"
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void imx233_dma_init(void)
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{
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/* Enable APHB and APBX */
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__REG_CLR(HW_APBH_CTRL0) = __BLOCK_CLKGATE | __BLOCK_SFTRST;
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__REG_CLR(HW_APBX_CTRL0) = __BLOCK_CLKGATE | __BLOCK_SFTRST;
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}
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void imx233_dma_reset_channel(unsigned chan)
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{
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if(APB_IS_APBX_CHANNEL(chan))
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__REG_SET(HW_APBX_CHANNEL_CTRL) =
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HW_APBX_CHANNEL_CTRL__RESET_CHANNEL(APB_GET_DMA_CHANNEL(chan));
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else
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__REG_SET(HW_APBH_CTRL0) =
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HW_APBH_CTRL0__RESET_CHANNEL(APB_GET_DMA_CHANNEL(chan));
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}
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void imx233_dma_clkgate_channel(unsigned chan, bool enable_clock)
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{
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if(APB_IS_APBX_CHANNEL(chan))
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return;
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if(enable_clock)
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__REG_CLR(HW_APBH_CTRL0) =
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HW_APBH_CTRL0__CLKGATE_CHANNEL(APB_GET_DMA_CHANNEL(chan));
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else
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__REG_SET(HW_APBH_CTRL0) =
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HW_APBH_CTRL0__CLKGATE_CHANNEL(APB_GET_DMA_CHANNEL(chan));
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}
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void imx233_dma_enable_channel_interrupt(unsigned chan, bool enable)
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{
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volatile uint32_t *ptr;
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uint32_t bm;
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if(APB_IS_APBX_CHANNEL(chan))
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{
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ptr = &HW_APBX_CTRL1;
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bm = HW_APBX_CTRL1__CHx_CMDCMPLT_IRQ_EN(APB_GET_DMA_CHANNEL(chan));
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}
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else
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{
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ptr = &HW_APBH_CTRL1;;
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bm = HW_APBH_CTRL1__CHx_CMDCMPLT_IRQ_EN(APB_GET_DMA_CHANNEL(chan));
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}
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if(enable)
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{
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__REG_SET(*ptr) = bm;
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imx233_dma_clear_channel_interrupt(chan);
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}
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else
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__REG_CLR(*ptr) = bm;
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}
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void imx233_dma_clear_channel_interrupt(unsigned chan)
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{
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if(APB_IS_APBX_CHANNEL(chan))
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{
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__REG_CLR(HW_APBX_CTRL1) =
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HW_APBX_CTRL1__CHx_CMDCMPLT_IRQ(APB_GET_DMA_CHANNEL(chan));
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__REG_CLR(HW_APBX_CTRL2) =
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HW_APBX_CTRL2__CHx_ERROR_IRQ(APB_GET_DMA_CHANNEL(chan));
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}
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else
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{
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__REG_CLR(HW_APBH_CTRL1) =
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HW_APBH_CTRL1__CHx_CMDCMPLT_IRQ(APB_GET_DMA_CHANNEL(chan));
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__REG_CLR(HW_APBH_CTRL2) =
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HW_APBH_CTRL2__CHx_ERROR_IRQ(APB_GET_DMA_CHANNEL(chan));
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}
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}
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bool imx233_dma_is_channel_error_irq(unsigned chan)
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{
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if(APB_IS_APBX_CHANNEL(chan))
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return !!(HW_APBX_CTRL2 &
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HW_APBX_CTRL2__CHx_ERROR_IRQ(APB_GET_DMA_CHANNEL(chan)));
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else
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return !!(HW_APBH_CTRL2 &
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HW_APBH_CTRL2__CHx_ERROR_IRQ(APB_GET_DMA_CHANNEL(chan)));
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}
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void imx233_dma_start_command(unsigned chan, struct apb_dma_command_t *cmd)
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{
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if(APB_IS_APBX_CHANNEL(chan))
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{
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HW_APBX_CHx_NXTCMDAR(APB_GET_DMA_CHANNEL(chan)) = (uint32_t)cmd;
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HW_APBX_CHx_SEMA(APB_GET_DMA_CHANNEL(chan)) = 1;
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}
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else
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{
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HW_APBH_CHx_NXTCMDAR(APB_GET_DMA_CHANNEL(chan)) = (uint32_t)cmd;
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HW_APBH_CHx_SEMA(APB_GET_DMA_CHANNEL(chan)) = 1;
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}
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}
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void imx233_dma_wait_completion(unsigned chan)
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{
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volatile uint32_t *sema;
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if(APB_IS_APBX_CHANNEL(chan))
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sema = &HW_APBX_CHx_SEMA(APB_GET_DMA_CHANNEL(chan));
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else
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sema = &HW_APBH_CHx_SEMA(APB_GET_DMA_CHANNEL(chan));
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while(*sema & HW_APB_CHx_SEMA__PHORE_BM)
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;
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}
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