1. 根目录:
2. drivers
3. staging
4. fsl-mc
5. bus
6. dpbp.c

/* Copyright 2013-2014 Freescale Semiconductor Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the above-listed copyright holders nor the
* names of any contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation, either version 2 of that License or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "../include/mc-sys.h"
#include "../include/mc-cmd.h"
#include "../include/dpbp.h"
#include "../include/dpbp-cmd.h"

int dpbp_open(struct fsl_mc_io *mc_io, int dpbp_id, uint16_t *token)
{
	struct mc_command cmd = { 0 };
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_OPEN,
					  MC_CMD_PRI_LOW, 0);
	cmd.params[0] |= mc_enc(0, 32, dpbp_id);

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	*token = MC_CMD_HDR_READ_TOKEN(cmd.header);

	return err;
}
EXPORT_SYMBOL(dpbp_open);

int dpbp_close(struct fsl_mc_io *mc_io, uint16_t token)
{
	struct mc_command cmd = { 0 };

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_CLOSE, MC_CMD_PRI_HIGH,
					  token);

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}
EXPORT_SYMBOL(dpbp_close);

int dpbp_create(struct fsl_mc_io *mc_io,
		const struct dpbp_cfg *cfg,
		uint16_t *token)
{
	struct mc_command cmd = { 0 };
	int err;

	(void)(cfg); /* unused */

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_CREATE,
					  MC_CMD_PRI_LOW, 0);

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	*token = MC_CMD_HDR_READ_TOKEN(cmd.header);

	return 0;
}

int dpbp_destroy(struct fsl_mc_io *mc_io, uint16_t token)
{
	struct mc_command cmd = { 0 };

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_DESTROY,
					  MC_CMD_PRI_LOW, token);

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}

int dpbp_enable(struct fsl_mc_io *mc_io, uint16_t token)
{
	struct mc_command cmd = { 0 };

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_ENABLE, MC_CMD_PRI_LOW,
					  token);

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}
EXPORT_SYMBOL(dpbp_enable);

int dpbp_disable(struct fsl_mc_io *mc_io, uint16_t token)
{
	struct mc_command cmd = { 0 };

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_DISABLE,
					  MC_CMD_PRI_LOW, token);

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}
EXPORT_SYMBOL(dpbp_disable);

int dpbp_is_enabled(struct fsl_mc_io *mc_io, uint16_t token, int *en)
{
	struct mc_command cmd = { 0 };
	int err;
	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_IS_ENABLED, MC_CMD_PRI_LOW,
					  token);

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	*en = (int)mc_dec(cmd.params[0], 0, 1);

	return 0;
}

int dpbp_reset(struct fsl_mc_io *mc_io, uint16_t token)
{
	struct mc_command cmd = { 0 };

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_RESET,
					  MC_CMD_PRI_LOW, token);

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}

int dpbp_set_irq(struct fsl_mc_io *mc_io,
		 uint16_t token,
		 uint8_t irq_index,
		 uint64_t irq_paddr,
		 uint32_t irq_val,
		 int user_irq_id)
{
	struct mc_command cmd = { 0 };

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_SET_IRQ,
					  MC_CMD_PRI_LOW, token);
	cmd.params[0] |= mc_enc(0, 8, irq_index);
	cmd.params[0] |= mc_enc(32, 32, irq_val);
	cmd.params[1] |= mc_enc(0, 64, irq_paddr);
	cmd.params[2] |= mc_enc(0, 32, user_irq_id);

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}

int dpbp_get_irq(struct fsl_mc_io *mc_io,
		 uint16_t token,
		 uint8_t irq_index,
		 int *type,
		 uint64_t *irq_paddr,
		 uint32_t *irq_val,
		 int *user_irq_id)
{
	struct mc_command cmd = { 0 };
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_GET_IRQ,
					  MC_CMD_PRI_LOW, token);
	cmd.params[0] |= mc_enc(32, 8, irq_index);

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	*irq_val = (uint32_t)mc_dec(cmd.params[0], 0, 32);
	*irq_paddr = (uint64_t)mc_dec(cmd.params[1], 0, 64);
	*user_irq_id = (int)mc_dec(cmd.params[2], 0, 32);
	*type = (int)mc_dec(cmd.params[2], 32, 32);
	return 0;
}

int dpbp_set_irq_enable(struct fsl_mc_io *mc_io,
			uint16_t token,
			uint8_t irq_index,
			uint8_t en)
{
	struct mc_command cmd = { 0 };

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_SET_IRQ_ENABLE,
					  MC_CMD_PRI_LOW, token);
	cmd.params[0] |= mc_enc(0, 8, en);
	cmd.params[0] |= mc_enc(32, 8, irq_index);

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}

int dpbp_get_irq_enable(struct fsl_mc_io *mc_io,
			uint16_t token,
			uint8_t irq_index,
			uint8_t *en)
{
	struct mc_command cmd = { 0 };
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_GET_IRQ_ENABLE,
					  MC_CMD_PRI_LOW, token);
	cmd.params[0] |= mc_enc(32, 8, irq_index);

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	*en = (uint8_t)mc_dec(cmd.params[0], 0, 8);
	return 0;
}

int dpbp_set_irq_mask(struct fsl_mc_io *mc_io,
		      uint16_t token,
		      uint8_t irq_index,
		      uint32_t mask)
{
	struct mc_command cmd = { 0 };

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_SET_IRQ_MASK,
					  MC_CMD_PRI_LOW, token);
	cmd.params[0] |= mc_enc(0, 32, mask);
	cmd.params[0] |= mc_enc(32, 8, irq_index);

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}

int dpbp_get_irq_mask(struct fsl_mc_io *mc_io,
		      uint16_t token,
		      uint8_t irq_index,
		      uint32_t *mask)
{
	struct mc_command cmd = { 0 };
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_GET_IRQ_MASK,
					  MC_CMD_PRI_LOW, token);
	cmd.params[0] |= mc_enc(32, 8, irq_index);

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	*mask = (uint32_t)mc_dec(cmd.params[0], 0, 32);
	return 0;
}

int dpbp_get_irq_status(struct fsl_mc_io *mc_io,
			uint16_t token,
			uint8_t irq_index,
			uint32_t *status)
{
	struct mc_command cmd = { 0 };
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_GET_IRQ_STATUS,
					  MC_CMD_PRI_LOW, token);
	cmd.params[0] |= mc_enc(32, 8, irq_index);

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	*status = (uint32_t)mc_dec(cmd.params[0], 0, 32);
	return 0;
}

int dpbp_clear_irq_status(struct fsl_mc_io *mc_io,
			  uint16_t token,
			  uint8_t irq_index,
			  uint32_t status)
{
	struct mc_command cmd = { 0 };

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_CLEAR_IRQ_STATUS,
					  MC_CMD_PRI_LOW, token);
	cmd.params[0] |= mc_enc(0, 32, status);
	cmd.params[0] |= mc_enc(32, 8, irq_index);

	/* send command to mc*/
	return mc_send_command(mc_io, &cmd);
}

int dpbp_get_attributes(struct fsl_mc_io *mc_io,
			uint16_t token,
			struct dpbp_attr *attr)
{
	struct mc_command cmd = { 0 };
	int err;

	/* prepare command */
	cmd.header = mc_encode_cmd_header(DPBP_CMDID_GET_ATTR,
					  MC_CMD_PRI_LOW, token);

	/* send command to mc*/
	err = mc_send_command(mc_io, &cmd);
	if (err)
		return err;

	/* retrieve response parameters */
	attr->bpid = (uint16_t)mc_dec(cmd.params[0], 16, 16);
	attr->id = (int)mc_dec(cmd.params[0], 32, 32);
	attr->version.major = (uint16_t)mc_dec(cmd.params[1], 0, 16);
	attr->version.minor = (uint16_t)mc_dec(cmd.params[1], 16, 16);
	return 0;
}
EXPORT_SYMBOL(dpbp_get_attributes);