/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
 *
 * 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 Linux Foundation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER 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 <debug.h>
#include <string.h>
#include <reg.h>
#include <arch/defines.h>
#include <sys/types.h>
#include <stdlib.h>
#include <endian.h>
#include <ufs.h>
#include <dme.h>
#include <uic.h>
#include <utp.h>
#include <ucs.h>
#include <crc32.h>

int dme_send_linkstartup_req(struct ufs_dev *dev)
{
	struct uic_cmd cmd;

	cmd.uiccmd        = UICCMDR_DME_LINKSTARTUP;
	cmd.num_args      = UICCMD_NO_ARGS;
	cmd.timeout_msecs = DME_LINK_START_TIMEOUT;

	if (uic_send_cmd(dev, &cmd) || cmd.gen_err_code == UICCMD_FAILURE)
		goto dme_send_linkstartup_req_err;

	return UFS_SUCCESS;

dme_send_linkstartup_req_err:
	dprintf(CRITICAL, "%s:%d DME_LINKSTARTUP command failed.\n",__func__, __LINE__);
	return -UFS_FAILURE;
}

int dme_get_req(struct ufs_dev *dev, struct dme_get_req_type *req)
{
	struct uic_cmd cmd;

	cmd.uiccmd	      = UICCMDR_DME_GET;
	cmd.num_args      = UICCMD_ONE_ARGS;
	cmd.uiccmdarg1    = req->attribute << 16 | req->index;
	cmd.timeout_msecs = INFINITE_TIME;

	if (uic_send_cmd(dev, &cmd) || cmd.gen_err_code == UICCMD_FAILURE)
		goto dme_get_req_err;

	/* Return the result. */
	*(req->mibval) = cmd.uiccmdarg3;

	return UFS_SUCCESS;

dme_get_req_err:
	dprintf(CRITICAL, "%s:%d DME_GET command failed.\n", __func__, __LINE__);
	return -UFS_FAILURE;
}

static int dme_get_query_resp(struct ufs_dev *dev,
					          struct upiu_req_build_type *req_upiu,
					          addr_t buffer,
					          size_t buf_len)
{
	struct upiu_trans_mgmt_query_hdr *resp_upiu;

	resp_upiu = (struct upiu_trans_mgmt_query_hdr *) req_upiu->resp_ptr;

	if (resp_upiu->opcode != req_upiu->opcode)
	{
		dprintf(CRITICAL, "%s:%d Opcode from respose does not match with Opcode from request\n", __func__, __LINE__);
		return -UFS_FAILURE;
	}
	if (resp_upiu->basic_hdr.response != UPIU_QUERY_RESP_SUCCESS)
	{
		dprintf(CRITICAL, "%s:%d UPIU Response is not SUCCESS, response code: 0x%x\n", __func__, __LINE__, resp_upiu->basic_hdr.response);
		return -UFS_FAILURE;
	}

	switch (resp_upiu->opcode)
	{
		case UPIU_QUERY_OP_READ_ATTRIBUTE:
		case UPIU_QUERY_OP_READ_FLAG:
		case UPIU_QUERY_OP_SET_FLAG:
									  if (buf_len < sizeof(uint32_t))
									  {
										dprintf(CRITICAL, "%s:%d Insufficient buffer space.\n", __func__, __LINE__);
										return -UFS_FAILURE;
									  }

									  *((uint32_t *) buffer) = resp_upiu->resv_1[3]; //resv_1[3] contains the data for flag
									  break;
		case UPIU_QUERY_OP_WRITE_ATTRIBUTE:
		case UPIU_QUERY_OP_TOGGLE_FLAG:
		case UPIU_QUERY_OP_CLEAR_FLAG:
		case UPIU_QUERY_OP_READ_DESCRIPTOR:
									 break;
		default:
				dprintf(CRITICAL, "%s:%d UPIU query opcode not supported.\n", __func__, __LINE__);
				return -UFS_FAILURE;
	}

	return UFS_SUCCESS;
}

static int dme_send_query_upiu(struct ufs_dev *dev, struct utp_query_req_upiu_type *query)
{
	struct upiu_trans_mgmt_query_hdr resp_upiu;
	struct upiu_req_build_type       req_upiu;
	int                              ret;

	memset(&req_upiu, 0, sizeof(req_upiu));

	req_upiu.opcode        = query->opcode;
	req_upiu.selector      = query->selector;
	req_upiu.index         = query->index;
	req_upiu.idn           = query->idn;
	req_upiu.trans_type    = UPIU_TYPE_QUERY_REQ;
	req_upiu.dd            = UTRD_NO_DATA_TRANSFER;
	req_upiu.resp_ptr      = (struct upiu_basic_resp_hdr *) &resp_upiu;
	req_upiu.resp_len      = sizeof(resp_upiu);
	req_upiu.resp_data_ptr = query->buf;
	req_upiu.timeout_msecs = UTP_GENERIC_CMD_TIMEOUT;

	if (query->opcode == UPIU_QUERY_OP_READ_DESCRIPTOR)
	{
		req_upiu.resp_data_len = query->buf_len;
	}

	if (query->opcode == UPIU_QUERY_OP_WRITE_ATTRIBUTE)
		req_upiu.data_buffer_addr = query->buf; // attribute is 4 byte value

	ret = utp_enqueue_upiu(dev, &req_upiu);
	if (ret)
		goto utp_send_query_upiu_err;

	ret = dme_get_query_resp(dev, &req_upiu, query->buf, query->buf_len);
	if (ret)
		goto utp_send_query_upiu_err;

utp_send_query_upiu_err:
	return ret;
}

int dme_set_bbootlunen(struct ufs_dev *dev, uint32_t val)
{
	int ret = 0;
	STACKBUF_DMA_ALIGN(value, sizeof(uint32_t));
	memset((void *)value, 0, sizeof(uint32_t));
	*value = val;
	struct utp_query_req_upiu_type set_query = {UPIU_QUERY_OP_WRITE_ATTRIBUTE,
												 UFS_IDX_bBootLunEn,
												 0,
												 0,
												 (addr_t)value,
												 sizeof(uint32_t)};
	if ((ret = dme_send_query_upiu(dev, &set_query)))
	{
		arch_invalidate_cache_range((addr_t) value, sizeof(uint32_t));
		dprintf(CRITICAL, "%s:%d DME Set Boot Lun Query failed. Value 0x%x\n", __func__, __LINE__, *value);
		return -UFS_FAILURE;
	}
	return UFS_SUCCESS;
}

int dme_get_bbootlunen(struct ufs_dev *dev)
{
	STACKBUF_DMA_ALIGN(value, sizeof(uint32_t));
	memset((void *)value, 0, sizeof(uint32_t));
	int ret = 0;
	struct utp_query_req_upiu_type set_query = {UPIU_QUERY_OP_READ_ATTRIBUTE,
												 UFS_IDX_bBootLunEn,
												 0,
												 0,
												 (addr_t)value,
												 sizeof(uint32_t)};
	if ((ret = dme_send_query_upiu(dev, &set_query)))
	{
		dprintf(CRITICAL, "%s:%d DME Set Boot Lun Query failed\n", __func__, __LINE__);
		return -UFS_FAILURE;
	}
	arch_invalidate_cache_range((addr_t) value, sizeof(uint32_t));
	return *value;
}

int dme_set_fpurgeenable(struct ufs_dev *dev)
{
	STACKBUF_DMA_ALIGN(result, sizeof(uint32_t));
	STACKBUF_DMA_ALIGN(status, sizeof(uint32_t));
	uint32_t try_again                        = DME_BPURGESTATUS_RETRIES;
	struct utp_query_req_upiu_type set_query  = {UPIU_QUERY_OP_SET_FLAG,
												 UFS_IDX_fPurgeEn,
												 0,
												 0,
												 (addr_t) result,
												 sizeof(uint32_t)};
	struct utp_query_req_upiu_type read_query = {UPIU_QUERY_OP_READ_ATTRIBUTE,
												 UFS_IDX_bPurgeStatus,
												 0,
												 0,
												 (addr_t)status,
												 sizeof(uint32_t)};

	if (dme_send_query_upiu(dev, &set_query))
	{
		dprintf(CRITICAL, "%s:%d DME Purge Enable failed\n", __func__, __LINE__);
		return -UFS_FAILURE;
	}

	arch_invalidate_cache_range((addr_t) result, sizeof(uint32_t));
	dprintf(INFO, "%s:%d Purge enable status: %u\n", __func__,__LINE__, *result);

	do {
		*status = 0;
		arch_invalidate_cache_range((addr_t) status, sizeof(uint32_t));
		if (dme_send_query_upiu(dev, &read_query))
		{
			dprintf(CRITICAL, "%s:%d DME Purge Status Read failed\n", __func__, __LINE__);
			return -UFS_FAILURE;
		}

		switch (*status)
		{

			case 0x0:
#ifdef DEBUG_UFS
				dprintf(INFO, "%s:%d Purge operation returning to ufs_erase. Purge Status 0x0\n", __func__, __LINE__);
#endif
				return UFS_SUCCESS;
			case 0x3:
#ifdef DEBUG_UFS
				dprintf(INFO, "%s:%d Purge operation has completed. Purge Status:0x3\n", __func__, __LINE__);
#endif
				// next read of status will move to 0
				continue;
			case 0x1:
#ifdef DEBUG_UFS
				dprintf(INFO, "%s:%d Purge operation is still in progress.. Retrying\n", __func__, __LINE__);
#endif
				try_again--;
				continue;
			case 0x2:
				dprintf(CRITICAL, "%s:%d Purge operation stopped prematurely\n", __func__, __LINE__);
				return -UFS_FAILURE;
			case 0x4:
				dprintf(CRITICAL, "%s:%d Purge operation failed due to logical unit queue not empty\n", __func__, __LINE__);
				return -UFS_FAILURE;
			case 0x5:
				dprintf(CRITICAL, "%s:%d Purge operation general failure\n", __func__, __LINE__);
				return -UFS_FAILURE;
		}
	} while((*status == 0x1 || *status == 0x3) && try_again);

	// should not come here
	dprintf(CRITICAL, "%s:%d Purge operation timed out after checking status %d times\n", __func__, __LINE__, DME_BPURGESTATUS_RETRIES);
	return -UFS_FAILURE;
}

int dme_set_fpoweronwpen(struct ufs_dev *dev)
{
	STACKBUF_DMA_ALIGN(result, sizeof(uint32_t));
	uint32_t try_again                        = DME_FPOWERONWPEN_RETRIES;
	struct utp_query_req_upiu_type read_query = {UPIU_QUERY_OP_READ_FLAG,
                                                 UFS_IDX_fPowerOnWPEn,
                                                 0,
                                                 0,
                                                 (addr_t) result,
                                                 sizeof(uint32_t)};
	struct utp_query_req_upiu_type set_query  = {UPIU_QUERY_OP_SET_FLAG,
                                                 UFS_IDX_fPowerOnWPEn,
                                                 0,
                                                 0,
                                                 (addr_t) result,
                                                 sizeof(uint32_t)};


	if (dme_send_query_upiu(dev, &read_query))
	{
		dprintf(CRITICAL, "%s:%d DME Power On Write Read Request failed\n", __func__, __LINE__);
		return -UFS_FAILURE;
	}

	arch_invalidate_cache_range((addr_t) result, sizeof(uint32_t));

	if (*result == 1)
		goto utp_set_fpoweronwpen_done;

	do
	{
		try_again--;
		dprintf(CRITICAL, "Power on Write Protect request failed. Retrying again.\n");

		if (dme_send_query_upiu(dev, &set_query))
		{
			dprintf(CRITICAL, "%s:%d DME Power On Write Set Request failed\n", __func__, __LINE__);
			return -UFS_FAILURE;
		}

		if (dme_send_query_upiu(dev, &read_query))
		{
			dprintf(CRITICAL, "%s:%d DME Power On Write Read Request failed\n", __func__, __LINE__);
			return -UFS_FAILURE;
		}

		if (*result == 1)
			break;
	} while (try_again);

utp_set_fpoweronwpen_done:
	dprintf(INFO,"Power on Write Protect status: %u\n", *result);
	return UFS_SUCCESS;
}

int dme_set_fdeviceinit(struct ufs_dev *dev)
{
	uint32_t result;
	uint32_t try_again                        = DME_FDEVICEINIT_RETRIES;
	struct utp_query_req_upiu_type read_query = {UPIU_QUERY_OP_READ_FLAG,
												 UFS_IDX_fDeviceInit,
												 0,
												 0,
												 (addr_t) &result,
												 sizeof(uint32_t)};
	struct utp_query_req_upiu_type set_query  = {UPIU_QUERY_OP_SET_FLAG,
												 UFS_IDX_fDeviceInit,
												 0,
												 0,
												 (addr_t) &result,
												 sizeof(uint32_t)};


	if (dme_send_query_upiu(dev, &read_query))
	{
		dprintf(CRITICAL, "%s:%d DME Device Init Read request failed\n", __func__, __LINE__);
		return -UFS_FAILURE;
	}

	if (result == 1)
		goto utp_set_fdeviceinit_done;

	do
	{
		try_again--;

		if (dme_send_query_upiu(dev, &set_query))
		{
			dprintf(CRITICAL, "%s:%d DME Device Init Set request failed\n", __func__, __LINE__);
			return -UFS_FAILURE;
		}

		if (dme_send_query_upiu(dev, &read_query))
		{
			dprintf(CRITICAL, "%s:%d DME Device Init Read request failed\n", __func__, __LINE__);
			return -UFS_FAILURE;
		}

		if (result == 1)
			break;
	} while (try_again);

utp_set_fdeviceinit_done:
	return UFS_SUCCESS;
}

int dme_read_string_desc(struct ufs_dev *dev, uint8_t index, struct ufs_string_desc *desc)
{
	struct utp_query_req_upiu_type query = {UPIU_QUERY_OP_READ_DESCRIPTOR,
											UFS_DESC_IDN_STRING,
											index,
											0,
											(addr_t) desc,
											sizeof(struct ufs_string_desc)};

	if (dme_send_query_upiu(dev, &query))
	{
		dprintf(CRITICAL, "%s:%d DME Read String Descriptor request failed\n", __func__, __LINE__);
		return -UFS_FAILURE;
	}

	if (desc->desc_len != 0)
		return UFS_SUCCESS;
	dprintf(CRITICAL, "%s:%d DME Read String Descriptor is length 0\n", __func__, __LINE__);
	return -UFS_FAILURE;
}

static uint32_t dme_parse_serial_no(struct ufs_string_desc *desc)
{
	uint32_t serial_no=0;
	int len=0;

	if(desc->desc_len <= 0)
	{
		dprintf(CRITICAL, "%s:%d Invalid string descriptor length\n", __func__, __LINE__);
		return -UFS_FAILURE;
	}

	len = (desc->desc_len-2)/2;

	serial_no = crc32(~0L, desc->serial_num, len);

	return serial_no;
}

int dme_read_device_desc(struct ufs_dev *dev)
{
	struct ufs_dev_desc            device_desc;
	struct ufs_string_desc         str_desc;
	struct utp_query_req_upiu_type query = {UPIU_QUERY_OP_READ_DESCRIPTOR,
											UFS_DESC_IDN_DEVICE,
											0,
											0,
											(addr_t) &device_desc,
											sizeof(struct ufs_dev_desc)};

	if (dme_send_query_upiu(dev, &query))
	{
		dprintf(CRITICAL, "%s:%d DME Read Device Descriptor request failed\n", __func__, __LINE__);
		return -UFS_FAILURE;
	}

	/* Store all relevant data */
	dev->num_lus = device_desc.num_lu;

	/* Get serial number for the device based on the string index. */
	if (dme_read_string_desc(dev, device_desc.serial_num, (struct ufs_string_desc *) &str_desc))
		return -UFS_FAILURE;

	dev->serial_num = dme_parse_serial_no(&str_desc);

	return UFS_SUCCESS;
}


int dme_read_geo_desc(struct ufs_dev *dev)
{
	struct ufs_geometry_desc *desc;
	STACKBUF_DMA_ALIGN(geometry_desc, sizeof(struct ufs_geometry_desc));
	desc = (struct ufs_geometry_desc *) geometry_desc;
	struct utp_query_req_upiu_type query = {UPIU_QUERY_OP_READ_DESCRIPTOR,
											UFS_DESC_IDN_GEOMETRY,
											0,
											0,
											(addr_t) geometry_desc,
											sizeof(struct ufs_geometry_desc)};

	if (dme_send_query_upiu(dev, &query))
	{
		dprintf(CRITICAL, "%s:%d DME Read Geometry Descriptor request failed\n", __func__, __LINE__);
		return -UFS_FAILURE;
	}

	dev->rpmb_rw_size = desc->rpmb_read_write_size;
	return UFS_SUCCESS;
}

int dme_read_unit_desc(struct ufs_dev *dev, uint8_t index)
{
	struct ufs_unit_desc unit_desc;
	struct ufs_unit_desc           *desc = (struct ufs_unit_desc *) &unit_desc;
	struct utp_query_req_upiu_type query = {UPIU_QUERY_OP_READ_DESCRIPTOR,
											UFS_DESC_IDN_UNIT,
											index,
											0,
											(addr_t) &unit_desc,
											sizeof(struct ufs_unit_desc)};

	if (dme_send_query_upiu(dev, &query))
	{
		dprintf(CRITICAL, "%s:%d DME Read Unit Descriptor request failed\n", __func__, __LINE__);
		return -UFS_FAILURE;
	}

	// use only the lower 32 bits for rpmb partition size
	if (index == UFS_WLUN_RPMB)
		dev->rpmb_num_blocks = BE32(desc->logical_blk_cnt >> 32);
	/*
	 rpmb will not use blk count and blk size from lun_cfg as it has
	 its own entries in ufs_dev structure
	*/
	else
	{
		dev->lun_cfg[index].logical_blk_cnt = BE64(desc->logical_blk_cnt);
		dev->lun_cfg[index].erase_blk_size = BE32(desc->erase_blk_size);
	}


	return UFS_SUCCESS;
}

int dme_read_config_desc(struct ufs_dev *dev)
{
	STACKBUF_DMA_ALIGN(desc, sizeof(struct ufs_config_desc));
	struct ufs_config_desc         *config_desc = (struct ufs_config_desc *)desc;
	struct utp_query_req_upiu_type query = {UPIU_QUERY_OP_READ_DESCRIPTOR,
											UFS_DESC_IDN_CONFIGURATION,
											0,
											0,
											(addr_t) config_desc,
											sizeof(struct ufs_config_desc)};

	if (dme_send_query_upiu(dev, &query))
	{
		dprintf(CRITICAL, "%s:%d DME Read Config Descriptor request failed\n", __func__, __LINE__);
		return -UFS_FAILURE;
	}

	/* Flush buffer. */
	arch_invalidate_cache_range((addr_t) config_desc, sizeof(struct ufs_config_desc));

	return UFS_SUCCESS;
}

int dme_send_nop_query(struct ufs_dev *dev)
{
	struct upiu_req_build_type     req_upiu;
	struct upiu_basic_resp_hdr     resp_upiu;
	int                            ret;
	unsigned                       try_again;

	ret       = UFS_SUCCESS;
	try_again = DME_NOP_NUM_RETRIES;

	memset(&req_upiu, 0 , sizeof(struct upiu_req_build_type));

	req_upiu.trans_type        = UPIU_TYPE_NOP_OUT;
	req_upiu.flags             = 0;
	req_upiu.query_mgmt_func   = 0;
	req_upiu.cmd_type          = UTRD_DEV_MGMT_FUNC;
	req_upiu.dd                = UTRD_NO_DATA_TRANSFER;
	req_upiu.resp_ptr          = &resp_upiu;
	req_upiu.resp_len          = sizeof(struct upiu_basic_hdr);
	req_upiu.timeout_msecs     = DME_NOP_QUERY_TIMEOUT;

	while (try_again)
	{
		try_again--;

		ret = utp_enqueue_upiu(dev, &req_upiu);

		if (ret == -UFS_RETRY)
		{
			continue;
		}
		else if (ret == -UFS_FAILURE)
		{
			dprintf(CRITICAL, "%s:%d Sending nop out failed.\n", __func__, __LINE__);
			goto upiu_send_nop_out_err;
		}

		/* Check response UPIU */
		if (resp_upiu.trans_type != UPIU_TYPE_NOP_IN)
		{
			dprintf(CRITICAL, "%s:%d Command failed. command = %x. Invalid response.\n",__func__,__LINE__, req_upiu.trans_type);
			ret = -UFS_FAILURE;
			goto upiu_send_nop_out_err;
		}
		else
			break;
	}

upiu_send_nop_out_err:
	return ret;
}

int utp_build_query_req_upiu(struct upiu_trans_mgmt_query_hdr *req_upiu,
							 struct upiu_req_build_type *upiu_data)
{
	req_upiu->opcode    = upiu_data->opcode;
	req_upiu->idn       = upiu_data->idn;
	req_upiu->index     = upiu_data->index;
	req_upiu->selector  = upiu_data->selector;
	req_upiu->resp_len  = BE16(upiu_data->resp_data_len);

	switch (upiu_data->opcode)
	{
		case UPIU_QUERY_OP_READ_FLAG:
		case UPIU_QUERY_OP_READ_ATTRIBUTE:
		case UPIU_QUERY_OP_READ_DESCRIPTOR:
											req_upiu->basic_hdr.query_task_mgmt_func = UPIU_QUERY_FUNC_STD_READ_REQ;
											break;
		case UPIU_QUERY_OP_TOGGLE_FLAG:
		case UPIU_QUERY_OP_WRITE_ATTRIBUTE:
		case UPIU_QUERY_OP_CLEAR_FLAG:
		case UPIU_QUERY_OP_SET_FLAG:
									 req_upiu->basic_hdr.query_task_mgmt_func = UPIU_QUERY_FUNC_STD_WRITE_REQ;
									 break;
		default:
				dprintf(CRITICAL, "%s:%d UPIU query opcode not supported.\n", __func__, __LINE__);
				return -UFS_FAILURE;
	}
	if (upiu_data->opcode == UPIU_QUERY_OP_WRITE_ATTRIBUTE)
	{
		req_upiu->resv_1[0] = (*(uint32_t *)(upiu_data->data_buffer_addr) >> 24);
		req_upiu->resv_1[1] = (*(uint32_t *)(upiu_data->data_buffer_addr) >> 16);
		req_upiu->resv_1[2] = (*(uint32_t *)(upiu_data->data_buffer_addr) >> 8);
		req_upiu->resv_1[3] = (*(uint32_t *)(upiu_data->data_buffer_addr) & 0xFF);
	}

	return UFS_SUCCESS;
}