linux-imx

/*

 * Copyright (C) 2008

 * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>

 *

 * Copyright (C) 2005-2007 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 version 2 as

 * published by the Free Software Foundation.

 */

​

#include <linux/dma-mapping.h>

#include <linux/init.h>

#include <linux/platform_device.h>

#include <linux/err.h>

#include <linux/spinlock.h>

#include <linux/delay.h>

#include <linux/list.h>

#include <linux/clk.h>

#include <linux/vmalloc.h>

#include <linux/string.h>

#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/dma/ipu-dma.h>

​

#include "../dmaengine.h"

#include "ipu_intern.h"

​

#define FS_VF_IN_VALID  0x00000002

#define FS_ENC_IN_VALID 0x00000001

​

static int ipu_disable_channel(struct idmac *idmac, struct idmac_channel *ichan,

                   bool wait_for_stop);

​

/*

 * There can be only one, we could allocate it dynamically, but then we'd have

 * to add an extra parameter to some functions, and use something as ugly as

 *  struct ipu *ipu = to_ipu(to_idmac(ichan->dma_chan.device));

 * in the ISR

 */

static struct ipu ipu_data;

​

#define to_ipu(id) container_of(id, struct ipu, idmac)

​

static u32 __idmac_read_icreg(struct ipu *ipu, unsigned long reg)

{

    return __raw_readl(ipu->reg_ic + reg);

}

​

#define idmac_read_icreg(ipu, reg) __idmac_read_icreg(ipu, reg - IC_CONF)

​

static void __idmac_write_icreg(struct ipu *ipu, u32 value, unsigned long reg)

{

    __raw_writel(value, ipu->reg_ic + reg);

}

​

#define idmac_write_icreg(ipu, v, reg) __idmac_write_icreg(ipu, v, reg - IC_CONF)

​

static u32 idmac_read_ipureg(struct ipu *ipu, unsigned long reg)

{

    return __raw_readl(ipu->reg_ipu + reg);

}

​

static void idmac_write_ipureg(struct ipu *ipu, u32 value, unsigned long reg)

{

    __raw_writel(value, ipu->reg_ipu + reg);

}

​

/*****************************************************************************

 * IPU / IC common functions

 */

static void dump_idmac_reg(struct ipu *ipu)

{

    dev_dbg(ipu->dev, "IDMAC_CONF 0x%x, IC_CONF 0x%x, IDMAC_CHA_EN 0x%x, "

        "IDMAC_CHA_PRI 0x%x, IDMAC_CHA_BUSY 0x%x\n",

        idmac_read_icreg(ipu, IDMAC_CONF),

        idmac_read_icreg(ipu, IC_CONF),

        idmac_read_icreg(ipu, IDMAC_CHA_EN),

        idmac_read_icreg(ipu, IDMAC_CHA_PRI),

        idmac_read_icreg(ipu, IDMAC_CHA_BUSY));

    dev_dbg(ipu->dev, "BUF0_RDY 0x%x, BUF1_RDY 0x%x, CUR_BUF 0x%x, "

        "DB_MODE 0x%x, TASKS_STAT 0x%x\n",

        idmac_read_ipureg(ipu, IPU_CHA_BUF0_RDY),

        idmac_read_ipureg(ipu, IPU_CHA_BUF1_RDY),

        idmac_read_ipureg(ipu, IPU_CHA_CUR_BUF),

        idmac_read_ipureg(ipu, IPU_CHA_DB_MODE_SEL),

        idmac_read_ipureg(ipu, IPU_TASKS_STAT));

}

​

static uint32_t bytes_per_pixel(enum pixel_fmt fmt)

{