/*************************************************************************** * __________ __ ___. * 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 */ } __attribute__((packed)); #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__