diff options
Diffstat (limited to 'arch/arm/include/asm/arch-mxs/dma.h')
| -rw-r--r-- | arch/arm/include/asm/arch-mxs/dma.h | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/arch/arm/include/asm/arch-mxs/dma.h b/arch/arm/include/asm/arch-mxs/dma.h deleted file mode 100644 index 1ac8696e64e..00000000000 --- a/arch/arm/include/asm/arch-mxs/dma.h +++ /dev/null @@ -1,165 +0,0 @@ -/* - * Freescale i.MX28 APBH DMA - * - * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com> - * on behalf of DENX Software Engineering GmbH - * - * Based on code from LTIB: - * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved. - * - * 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 program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -#ifndef __DMA_H__ -#define __DMA_H__ - -#include <linux/list.h> -#include <linux/compiler.h> - -#ifndef CONFIG_ARCH_DMA_PIO_WORDS -#define DMA_PIO_WORDS 15 -#else -#define DMA_PIO_WORDS CONFIG_ARCH_DMA_PIO_WORDS -#endif - -#define MXS_DMA_ALIGNMENT 32 - -/* - * MXS DMA channels - */ -#if defined(CONFIG_MX23) -enum { - MXS_DMA_CHANNEL_AHB_APBH_LCDIF = 0, - MXS_DMA_CHANNEL_AHB_APBH_SSP0, - MXS_DMA_CHANNEL_AHB_APBH_SSP1, - MXS_DMA_CHANNEL_AHB_APBH_RESERVED0, - MXS_DMA_CHANNEL_AHB_APBH_GPMI0, - MXS_DMA_CHANNEL_AHB_APBH_GPMI1, - MXS_DMA_CHANNEL_AHB_APBH_GPMI2, - MXS_DMA_CHANNEL_AHB_APBH_GPMI3, - MXS_MAX_DMA_CHANNELS, -}; -#elif defined(CONFIG_MX28) -enum { - MXS_DMA_CHANNEL_AHB_APBH_SSP0 = 0, - MXS_DMA_CHANNEL_AHB_APBH_SSP1, - MXS_DMA_CHANNEL_AHB_APBH_SSP2, - MXS_DMA_CHANNEL_AHB_APBH_SSP3, - MXS_DMA_CHANNEL_AHB_APBH_GPMI0, - MXS_DMA_CHANNEL_AHB_APBH_GPMI1, - MXS_DMA_CHANNEL_AHB_APBH_GPMI2, - MXS_DMA_CHANNEL_AHB_APBH_GPMI3, - MXS_DMA_CHANNEL_AHB_APBH_GPMI4, - MXS_DMA_CHANNEL_AHB_APBH_GPMI5, - MXS_DMA_CHANNEL_AHB_APBH_GPMI6, - MXS_DMA_CHANNEL_AHB_APBH_GPMI7, - MXS_DMA_CHANNEL_AHB_APBH_HSADC, - MXS_DMA_CHANNEL_AHB_APBH_LCDIF, - MXS_DMA_CHANNEL_AHB_APBH_RESERVED0, - MXS_DMA_CHANNEL_AHB_APBH_RESERVED1, - MXS_MAX_DMA_CHANNELS, -}; -#endif - -/* - * MXS DMA hardware command. - * - * This structure describes the in-memory layout of an entire DMA command, - * including space for the maximum number of PIO accesses. See the appropriate - * reference manual for a detailed description of what these fields mean to the - * DMA hardware. - */ -#define MXS_DMA_DESC_COMMAND_MASK 0x3 -#define MXS_DMA_DESC_COMMAND_OFFSET 0 -#define MXS_DMA_DESC_COMMAND_NO_DMAXFER 0x0 -#define MXS_DMA_DESC_COMMAND_DMA_WRITE 0x1 -#define MXS_DMA_DESC_COMMAND_DMA_READ 0x2 -#define MXS_DMA_DESC_COMMAND_DMA_SENSE 0x3 -#define MXS_DMA_DESC_CHAIN (1 << 2) -#define MXS_DMA_DESC_IRQ (1 << 3) -#define MXS_DMA_DESC_NAND_LOCK (1 << 4) -#define MXS_DMA_DESC_NAND_WAIT_4_READY (1 << 5) -#define MXS_DMA_DESC_DEC_SEM (1 << 6) -#define MXS_DMA_DESC_WAIT4END (1 << 7) -#define MXS_DMA_DESC_HALT_ON_TERMINATE (1 << 8) -#define MXS_DMA_DESC_TERMINATE_FLUSH (1 << 9) -#define MXS_DMA_DESC_PIO_WORDS_MASK (0xf << 12) -#define MXS_DMA_DESC_PIO_WORDS_OFFSET 12 -#define MXS_DMA_DESC_BYTES_MASK (0xffff << 16) -#define MXS_DMA_DESC_BYTES_OFFSET 16 - -struct mxs_dma_cmd { - unsigned long next; - unsigned long data; - union { - dma_addr_t address; - unsigned long alternate; - }; - unsigned long pio_words[DMA_PIO_WORDS]; -}; - -/* - * MXS DMA command descriptor. - * - * This structure incorporates an MXS DMA hardware command structure, along - * with metadata. - */ -#define MXS_DMA_DESC_FIRST (1 << 0) -#define MXS_DMA_DESC_LAST (1 << 1) -#define MXS_DMA_DESC_READY (1 << 31) - -struct mxs_dma_desc { - struct mxs_dma_cmd cmd; - unsigned int flags; - dma_addr_t address; - void *buffer; - struct list_head node; -} __aligned(MXS_DMA_ALIGNMENT); - -/** - * MXS DMA channel - * - * This structure represents a single DMA channel. The MXS platform code - * maintains an array of these structures to represent every DMA channel in the - * system (see mxs_dma_channels). - */ -#define MXS_DMA_FLAGS_IDLE 0 -#define MXS_DMA_FLAGS_BUSY (1 << 0) -#define MXS_DMA_FLAGS_FREE 0 -#define MXS_DMA_FLAGS_ALLOCATED (1 << 16) -#define MXS_DMA_FLAGS_VALID (1 << 31) - -struct mxs_dma_chan { - const char *name; - unsigned long dev; - struct mxs_dma_device *dma; - unsigned int flags; - unsigned int active_num; - unsigned int pending_num; - struct list_head active; - struct list_head done; -}; - -struct mxs_dma_desc *mxs_dma_desc_alloc(void); -void mxs_dma_desc_free(struct mxs_dma_desc *); -int mxs_dma_desc_append(int channel, struct mxs_dma_desc *pdesc); - -int mxs_dma_go(int chan); -void mxs_dma_init(void); -int mxs_dma_init_channel(int chan); -int mxs_dma_release(int chan); - -#endif /* __DMA_H__ */ |