/*
 * TISCI clock ops library
 *
 * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
 *	Lokesh Vutla <lokeshvutla@ti.com>
 *
 *  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 Texas Instruments Incorporated 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 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
 *  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 <string.h>
#include <sec_proxy.h>
#include <tisci_protocol.h>
#include <tisci.h>

static const char clock_state[MAX_CLOCK_HW_STATES + 1][MAX_CLOCK_STATE_LENGTH] = {
	[MSG_CLOCK_HW_STATE_NOT_READY] = "CLK_STATE_NOT_READY",
	[MSG_CLOCK_HW_STATE_READY] = "CLK_STATE_READY",
	[MAX_CLOCK_HW_STATES] = "CLK_STATE_UNKNOWN"
};

static int ti_sci_set_clock_state(uint32_t dev_id, uint32_t clk_id,
				  uint32_t flags, uint8_t state)
{
	struct ti_sci_msg_req_set_clock_state *req;
	uint8_t buf[SEC_PROXY_MAX_MSG_SIZE];
	struct k3_sec_proxy_msg msg;

	memset(buf, 0, sizeof(buf));
	ti_sci_setup_header((struct ti_sci_msg_hdr *)buf,
			    TI_SCI_MSG_SET_CLOCK_STATE, flags);
	req = (struct ti_sci_msg_req_set_clock_state *)buf;
	req->dev_id = dev_id;
	if (clk_id < 255) {
		req->clk_id = clk_id;
	} else {
		req->clk_id = 255;
		req->clk_id_32 = clk_id;
	}
	req->request_state = state;

	msg.len = sizeof(*req);
	msg.buf = buf;
	return ti_sci_xfer_msg(&msg);
}

int ti_sci_cmd_get_clk(uint32_t dev_id, uint32_t clk_id)
{
	return ti_sci_set_clock_state(dev_id, clk_id,
				      MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE,
				      MSG_CLOCK_SW_STATE_REQ);
}

int ti_sci_cmd_put_clk(uint32_t dev_id, uint32_t clk_id)
{
	return ti_sci_set_clock_state(dev_id, clk_id,
				      MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE,
				      MSG_CLOCK_SW_STATE_UNREQ);
}

const char *ti_sci_cmd_get_clk_state(uint32_t dev_id, uint32_t clk_id)
{
	struct ti_sci_msg_resp_get_clock_state *resp;
	struct ti_sci_msg_req_get_clock_state *req;
	uint8_t buf[SEC_PROXY_MAX_MSG_SIZE];
	struct k3_sec_proxy_msg msg;
	int ret;

	memset(buf, 0, sizeof(buf));
	ti_sci_setup_header((struct ti_sci_msg_hdr *)buf,
			    TI_SCI_MSG_GET_CLOCK_STATE, 0);
	req = (struct ti_sci_msg_req_get_clock_state *)buf;
	req->dev_id = dev_id;
	if (clk_id < 255) {
		req->clk_id = clk_id;
	} else {
		req->clk_id = 255;
		req->clk_id_32 = clk_id;
	}

	msg.len = sizeof(*req);
	msg.buf = buf;
	ret = ti_sci_xfer_msg(&msg);
	if (ret)
		return NULL;

	resp = (struct ti_sci_msg_resp_get_clock_state *)buf;

	return clock_state[resp->current_state];
}

int ti_sci_cmd_set_clk_freq(uint32_t dev_id, uint32_t clk_id, uint64_t freq)
{
	struct ti_sci_msg_req_set_clock_freq *req;
	uint8_t buf[SEC_PROXY_MAX_MSG_SIZE];
	struct k3_sec_proxy_msg msg;

	memset(buf, 0, sizeof(buf));
	ti_sci_setup_header((struct ti_sci_msg_hdr *)buf,
			    TI_SCI_MSG_SET_CLOCK_FREQ, 0);
	req = (struct ti_sci_msg_req_set_clock_freq *)buf;
	req->dev_id = dev_id;
	if (clk_id < 255) {
		req->clk_id = clk_id;
	} else {
		req->clk_id = 255;
		req->clk_id_32 = clk_id;
	}
	/* ToDo: Get best match freq and set that freq */
	req->min_freq_hz = freq;
	req->target_freq_hz = freq;
	req->max_freq_hz = freq;

	msg.len = sizeof(*req);
	msg.buf = buf;
	return ti_sci_xfer_msg(&msg);
}

int ti_sci_cmd_get_clk_freq(uint32_t dev_id, uint32_t clk_id, uint64_t *freq)
{
	struct ti_sci_msg_resp_get_clock_freq *resp;
	struct ti_sci_msg_req_get_clock_freq *req;
	uint8_t buf[SEC_PROXY_MAX_MSG_SIZE];
	struct k3_sec_proxy_msg msg;
	int ret;

	memset(buf, 0, sizeof(buf));
	ti_sci_setup_header((struct ti_sci_msg_hdr *)buf,
			    TI_SCI_MSG_GET_CLOCK_FREQ, 0);
	req = (struct ti_sci_msg_req_get_clock_freq *)buf;
	req->dev_id = dev_id;
	if (clk_id < 255) {
		req->clk_id = clk_id;
	} else {
		req->clk_id = 255;
		req->clk_id_32 = clk_id;
	}

	msg.len = sizeof(*req);
	msg.buf = buf;
	ret = ti_sci_xfer_msg(&msg);
	if (ret)
		return ret;

	resp = (struct ti_sci_msg_resp_get_clock_freq *)buf;
	*freq = resp->freq_hz;

	return 0;
}