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rockbox/firmware/target/arm/imx233/dma-imx233.h
Amaury Pouly f7132e4044 Fix copyright headers 
Change-Id: Ie65920b1192e9b737fcc2554d280fbcedfa39800
2012-12-29 01:40:35 +01:00

217 lines
8.2 KiB
C
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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.
*
****************************************************************************/
#ifndef __DMA_IMX233_H__
#define __DMA_IMX233_H__
#include "cpu.h"
#include "system.h"
#include "system-target.h"
/********
* APHB *
********/
#define HW_APBH_BASE 0x80004000
/* APHB channels */
#define HW_APBH_SSP(ssp) ssp
#define HW_APBH_NAND(dev) (4 + (ssp))
#define HW_APBH_CTRL0 (*(volatile uint32_t *)(HW_APBH_BASE + 0x0))
#define HW_APBH_CTRL0__FREEZE_CHANNEL(i) (1 << (i))
#define HW_APBH_CTRL0__CLKGATE_CHANNEL(i) (1 << ((i) + 8))
#define HW_APBH_CTRL0__RESET_CHANNEL(i) (1 << ((i) + 16))
#define HW_APBH_CTRL0__APB_BURST4_EN (1 << 28)
#define HW_APBH_CTRL0__APB_BURST8_EN (1 << 29)
#define HW_APBH_CTRL1 (*(volatile uint32_t *)(HW_APBH_BASE + 0x10))
#define HW_APBH_CTRL1__CHx_CMDCMPLT_IRQ(i) (1 << (i))
#define HW_APBH_CTRL1__CHx_CMDCMPLT_IRQ_EN(i) (1 << ((i) + 16))
#define HW_APBH_CTRL2 (*(volatile uint32_t *)(HW_APBH_BASE + 0x20))
#define HW_APBH_CTRL2__CHx_ERROR_IRQ(i) (1 << (i))
#define HW_APBH_CTRL2__CHx_ERROR_STATUS(i) (1 << ((i) + 16))
#define HW_APBH_CHx_CURCMDAR(i) (*(volatile uint32_t *)(HW_APBH_BASE + 0x40 + 0x70 * (i)))
#define HW_APBH_CHx_NXTCMDAR(i) (*(volatile uint32_t *)(HW_APBH_BASE + 0x50 + 0x70 * (i)))
#define HW_APBH_CHx_CMD(i) (*(volatile uint32_t *)(HW_APBH_BASE + 0x60 + 0x70 * (i)))
#define HW_APBH_CHx_BAR(i) (*(volatile uint32_t *)(HW_APBH_BASE + 0x70 + 0x70 * (i)))
#define HW_APBH_CHx_SEMA(i) (*(volatile uint32_t *)(HW_APBH_BASE + 0x80 + 0x70 * (i)))
#define HW_APBH_CHx_DEBUG1(i) (*(volatile uint32_t *)(HW_APBH_BASE + 0x90 + 0x70 * (i)))
#define HW_APBH_CHx_DEBUG2(i) (*(volatile uint32_t *)(HW_APBH_BASE + 0xa0 + 0x70 * (i)))
#define HW_APBH_CHx_DEBUG2__AHB_BYTES_BP 0
#define HW_APBH_CHx_DEBUG2__AHB_BYTES_BM 0xffff
#define HW_APBH_CHx_DEBUG2__APB_BYTES_BP 16
#define HW_APBH_CHx_DEBUG2__APB_BYTES_BM 0xffff0000
/********
* APHX *
********/
/* APHX channels */
#define HW_APBX_AUDIO_ADC 0
#define HW_APBX_AUDIO_DAC 1
#define HW_APBX_I2C 3
#define HW_APBX_BASE 0x80024000
#define HW_APBX_CTRL0 (*(volatile uint32_t *)(HW_APBX_BASE + 0x0))
#define HW_APBX_CTRL1 (*(volatile uint32_t *)(HW_APBX_BASE + 0x10))
#define HW_APBX_CTRL1__CHx_CMDCMPLT_IRQ(i) (1 << (i))
#define HW_APBX_CTRL1__CHx_CMDCMPLT_IRQ_EN(i) (1 << ((i) + 16))
#define HW_APBX_CTRL2 (*(volatile uint32_t *)(HW_APBX_BASE + 0x20))
#define HW_APBX_CTRL2__CHx_ERROR_IRQ(i) (1 << (i))
#define HW_APBX_CTRL2__CHx_ERROR_STATUS(i) (1 << ((i) + 16))
#define HW_APBX_CHANNEL_CTRL (*(volatile uint32_t *)(HW_APBX_BASE + 0x30))
#define HW_APBX_CHANNEL_CTRL__FREEZE_CHANNEL(i) (1 << (i))
#define HW_APBX_CHANNEL_CTRL__RESET_CHANNEL(i) (1 << ((i) + 16))
#define HW_APBX_CHx_CURCMDAR(i) (*(volatile uint32_t *)(HW_APBX_BASE + 0x100 + (i) * 0x70))
#define HW_APBX_CHx_NXTCMDAR(i) (*(volatile uint32_t *)(HW_APBX_BASE + 0x110 + (i) * 0x70))
#define HW_APBX_CHx_CMD(i) (*(volatile uint32_t *)(HW_APBX_BASE + 0x120 + (i) * 0x70))
#define HW_APBX_CHx_BAR(i) (*(volatile uint32_t *)(HW_APBX_BASE + 0x130 + (i) * 0x70))
#define HW_APBX_CHx_SEMA(i) (*(volatile uint32_t *)(HW_APBX_BASE + 0x140 + (i) * 0x70))
#define HW_APBX_CHx_DEBUG1(i) (*(volatile uint32_t *)(HW_APBX_BASE + 0x150 + (i) * 0x70))
#define HW_APBX_CHx_DEBUG2(i) (*(volatile uint32_t *)(HW_APBX_BASE + 0x160 + (i) * 0x70))
#define HW_APBX_CHx_DEBUG2__AHB_BYTES_BP 0
#define HW_APBX_CHx_DEBUG2__AHB_BYTES_BM 0xffff
#define HW_APBX_CHx_DEBUG2__APB_BYTES_BP 16
#define HW_APBX_CHx_DEBUG2__APB_BYTES_BM 0xffff0000
/**********
* COMMON *
**********/
/* DMA structures should be cache aligned and be padded so that their size
* is a multiple of a cache line size. Otherwise some nasty side effects
* could occur with adjacents data fields.
* The same apply to DMA buffers for the same reasons */
struct apb_dma_command_t
{
struct apb_dma_command_t *next;
uint32_t cmd;
void *buffer;
/* PIO words follow */
};
#define DMA_INFO_CURCMDADDR (1 << 0)
#define DMA_INFO_NXTCMDADDR (1 << 1)
#define DMA_INFO_CMD (1 << 2)
#define DMA_INFO_BAR (1 << 3)
#define DMA_INFO_APB_BYTES (1 << 4)
#define DMA_INFO_AHB_BYTES (1 << 5)
#define DMA_INFO_FREEZED (1 << 6)
#define DMA_INFO_GATED (1 << 7)
#define DMA_INFO_INTERRUPT (1 << 8)
#define DMA_INFO_ALL 0x1ff
struct imx233_dma_info_t
{
unsigned long cur_cmd_addr;
unsigned long nxt_cmd_addr;
unsigned long cmd;
unsigned long bar;
unsigned apb_bytes;
unsigned ahb_bytes;
bool freezed;
bool gated;
bool int_enabled;
bool int_cmdcomplt;
bool int_error;
int nr_unaligned;
};
#define APBH_DMA_CHANNEL(i) i
#define APBX_DMA_CHANNEL(i) ((i) | 0x10)
#define APB_IS_APBX_CHANNEL(x) ((x) & 0x10)
#define APB_GET_DMA_CHANNEL(x) ((x) & 0xf)
#define APB_SSP(ssp) APBH_DMA_CHANNEL(HW_APBH_SSP(ssp))
#define APB_AUDIO_ADC APBX_DMA_CHANNEL(HW_APBX_AUDIO_ADC)
#define APB_AUDIO_DAC APBX_DMA_CHANNEL(HW_APBX_AUDIO_DAC)
#define APB_I2C APBX_DMA_CHANNEL(HW_APBX_I2C)
#define APB_NAND(dev) APBH_DMA_CHANNEL(HW_APBH_NAND(dev))
#define HW_APB_CHx_CMD__COMMAND_BM 0x3
#define HW_APB_CHx_CMD__COMMAND_BP 0
#define HW_APB_CHx_CMD__COMMAND__NO_XFER 0
#define HW_APB_CHx_CMD__COMMAND__WRITE 1
#define HW_APB_CHx_CMD__COMMAND__READ 2
#define HW_APB_CHx_CMD__COMMAND__SENSE 3
#define HW_APB_CHx_CMD__CHAIN (1 << 2)
#define HW_APB_CHx_CMD__IRQONCMPLT (1 << 3)
/* those two are only available on APHB */
#define HW_APBH_CHx_CMD__NANDLOCK (1 << 4)
#define HW_APBH_CHx_CMD__NANDWAIT4READY (1 << 5)
#define HW_APB_CHx_CMD__SEMAPHORE (1 << 6)
#define HW_APB_CHx_CMD__WAIT4ENDCMD (1 << 7)
/* An errata advise not to use it */
#define HW_APB_CHx_CMD__HALTONTERMINATE (1 << 8)
#define HW_APB_CHx_CMD__CMDWORDS_BM 0xf000
#define HW_APB_CHx_CMD__CMDWORDS_BP 12
#define HW_APB_CHx_CMD__XFER_COUNT_BM 0xffff0000
#define HW_APB_CHx_CMD__XFER_COUNT_BP 16
/* For software use */
#define HW_APB_CHx_CMD__UNUSED_BP 8
#define HW_APB_CHx_CMD__UNUSED_BM (0xf << 8)
#define HW_APB_CHx_CMD__UNUSED_MAGIC (0xa << 8)
#define HW_APB_CHx_SEMA__PHORE_BM 0xff0000
#define HW_APB_CHx_SEMA__PHORE_BP 16
/* A single descriptor cannot transfer more than 2^16 bytes but because of the
* weird 0=64KiB, it's safer to restrict to 2^15 */
#define IMX233_MAX_SINGLE_DMA_XFER_SIZE (1 << 15)
void imx233_dma_init(void);
void imx233_dma_reset_channel(unsigned chan);
/* only apbh channel have clkgate control */
void imx233_dma_clkgate_channel(unsigned chan, bool enable_clock);
void imx233_dma_freeze_channel(unsigned chan, bool freeze);
void imx233_dma_enable_channel_interrupt(unsigned chan, bool enable);
/* clear both channel complete and error bits */
void imx233_dma_clear_channel_interrupt(unsigned chan);
bool imx233_dma_is_channel_error_irq(unsigned chan);
/* assume no command is in progress */
void imx233_dma_start_command(unsigned chan, struct apb_dma_command_t *cmd);
/* return value of the semaphore */
int imx233_dma_wait_completion(unsigned chan, unsigned tmo);
/* get some info
* WARNING: if channel is not freezed, data might not be coherent ! */
struct imx233_dma_info_t imx233_dma_get_info(unsigned chan, unsigned flags);
#endif // __DMA_IMX233_H__
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