2018-05-04 20:06:09 +01:00
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/*
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* Texas Instruments System Control Interface Driver
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* Based on Linux and U-Boot implementation
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*
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* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <debug.h>
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#include <errno.h>
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#include <platform_def.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <string.h>
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#include <sec_proxy.h>
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#include "ti_sci_protocol.h"
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#include "ti_sci.h"
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/**
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* struct ti_sci_desc - Description of SoC integration
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* @host_id: Host identifier representing the compute entity
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* @max_msg_size: Maximum size of data per message that can be handled
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*/
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struct ti_sci_desc {
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uint8_t host_id;
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int max_msg_size;
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};
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/**
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* struct ti_sci_info - Structure representing a TI SCI instance
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* @desc: SoC description for this instance
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* @seq: Seq id used for verification for tx and rx message
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*/
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struct ti_sci_info {
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const struct ti_sci_desc desc;
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uint8_t seq;
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};
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static struct ti_sci_info info = {
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.desc = {
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.host_id = TI_SCI_HOST_ID,
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.max_msg_size = TI_SCI_MAX_MESSAGE_SIZE,
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},
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.seq = 0x0a,
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};
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/**
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* struct ti_sci_xfer - Structure representing a message flow
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* @tx_message: Transmit message
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* @rx_message: Receive message
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*/
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struct ti_sci_xfer {
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struct k3_sec_proxy_msg tx_message;
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struct k3_sec_proxy_msg rx_message;
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};
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/**
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* ti_sci_setup_one_xfer() - Setup one message type
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*
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* @msg_type: Message type
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* @msg_flags: Flag to set for the message
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* @tx_buf: Buffer to be sent to mailbox channel
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* @tx_message_size: transmit message size
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* @rx_buf: Buffer to be received from mailbox channel
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* @rx_message_size: receive message size
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*
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* Helper function which is used by various command functions that are
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* exposed to clients of this driver for allocating a message traffic event.
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*
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* Return: 0 if all goes well, else appropriate error message
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*/
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static int ti_sci_setup_one_xfer(uint16_t msg_type, uint32_t msg_flags,
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void *tx_buf,
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size_t tx_message_size,
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void *rx_buf,
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size_t rx_message_size,
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struct ti_sci_xfer *xfer)
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{
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struct ti_sci_msg_hdr *hdr;
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/* Ensure we have sane transfer sizes */
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if (rx_message_size > info.desc.max_msg_size ||
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tx_message_size > info.desc.max_msg_size ||
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rx_message_size < sizeof(*hdr) ||
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tx_message_size < sizeof(*hdr))
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return -ERANGE;
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info.seq++;
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hdr = (struct ti_sci_msg_hdr *)tx_buf;
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hdr->seq = info.seq;
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hdr->type = msg_type;
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hdr->host = info.desc.host_id;
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hdr->flags = msg_flags;
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xfer->tx_message.buf = tx_buf;
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xfer->tx_message.len = tx_message_size;
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xfer->rx_message.buf = rx_buf;
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xfer->rx_message.len = rx_message_size;
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return 0;
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}
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/**
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* ti_sci_get_response() - Receive response from mailbox channel
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*
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* @xfer: Transfer to initiate and wait for response
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* @chan: Channel to receive the response
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*
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* Return: 0 if all goes well, else appropriate error message
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*/
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static inline int ti_sci_get_response(struct ti_sci_xfer *xfer,
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enum k3_sec_proxy_chan_id chan)
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{
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struct k3_sec_proxy_msg *msg = &xfer->rx_message;
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struct ti_sci_msg_hdr *hdr;
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int ret;
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/* Receive the response */
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ret = k3_sec_proxy_recv(chan, msg);
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if (ret) {
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ERROR("Message receive failed (%d)\n", ret);
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return ret;
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}
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/* msg is updated by Secure Proxy driver */
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hdr = (struct ti_sci_msg_hdr *)msg->buf;
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/* Sanity check for message response */
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if (hdr->seq != info.seq) {
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ERROR("Message for %d is not expected\n", hdr->seq);
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return -EINVAL;
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}
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if (msg->len > info.desc.max_msg_size) {
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ERROR("Unable to handle %lu xfer (max %d)\n",
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msg->len, info.desc.max_msg_size);
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return -EINVAL;
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}
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return 0;
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}
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/**
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* ti_sci_do_xfer() - Do one transfer
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*
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* @xfer: Transfer to initiate and wait for response
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*
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* Return: 0 if all goes well, else appropriate error message
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*/
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static inline int ti_sci_do_xfer(struct ti_sci_xfer *xfer)
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{
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struct k3_sec_proxy_msg *msg = &xfer->tx_message;
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int ret;
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/* Send the message */
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ret = k3_sec_proxy_send(SP_HIGH_PRIORITY, msg);
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if (ret) {
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ERROR("Message sending failed (%d)\n", ret);
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return ret;
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}
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ret = ti_sci_get_response(xfer, SP_RESPONSE);
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if (ret) {
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ERROR("Failed to get response (%d)\n", ret);
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return ret;
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}
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return 0;
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}
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/**
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* ti_sci_get_revision() - Get the revision of the SCI entity
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*
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* Updates the SCI information in the internal data structure.
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*
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* Return: 0 if all goes well, else appropriate error message
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*/
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int ti_sci_get_revision(struct ti_sci_msg_resp_version *rev_info)
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{
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struct ti_sci_msg_hdr hdr;
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struct ti_sci_xfer xfer;
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int ret;
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ret = ti_sci_setup_one_xfer(TI_SCI_MSG_VERSION, 0x0,
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&hdr, sizeof(hdr),
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rev_info, sizeof(*rev_info),
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&xfer);
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if (ret) {
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ERROR("Message alloc failed (%d)\n", ret);
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return ret;
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}
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ret = ti_sci_do_xfer(&xfer);
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if (ret) {
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ERROR("Transfer send failed (%d)\n", ret);
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return ret;
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}
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return 0;
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}
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2018-05-04 20:06:10 +01:00
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/**
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* ti_sci_is_response_ack() - Generic ACK/NACK message check
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*
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* @r: pointer to response buffer
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*
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* Return: true if the response was an ACK, else returns false
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*/
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static inline bool ti_sci_is_response_ack(void *r)
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{
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struct ti_sci_msg_hdr *hdr = r;
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return hdr->flags & TI_SCI_FLAG_RESP_GENERIC_ACK ? true : false;
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}
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/**
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* ti_sci_device_set_state() - Set device state
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*
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* @id: Device identifier
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* @flags: flags to setup for the device
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* @state: State to move the device to
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*
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* Return: 0 if all goes well, else appropriate error message
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*/
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int ti_sci_device_set_state(uint32_t id, uint32_t flags, uint8_t state)
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{
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struct ti_sci_msg_req_set_device_state req;
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struct ti_sci_msg_hdr resp;
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struct ti_sci_xfer xfer;
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int ret;
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ret = ti_sci_setup_one_xfer(TI_SCI_MSG_SET_DEVICE_STATE,
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flags | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
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&req, sizeof(req),
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&resp, sizeof(resp),
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&xfer);
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if (ret) {
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ERROR("Message alloc failed (%d)\n", ret);
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return ret;
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}
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req.id = id;
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req.state = state;
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ret = ti_sci_do_xfer(&xfer);
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if (ret) {
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ERROR("Transfer send failed (%d)\n", ret);
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return ret;
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}
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if (!ti_sci_is_response_ack(&resp))
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return -ENODEV;
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return 0;
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}
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/**
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* ti_sci_device_get_state() - Get device state
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*
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* @id: Device Identifier
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* @clcnt: Pointer to Context Loss Count
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* @resets: pointer to resets
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* @p_state: pointer to p_state
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* @c_state: pointer to c_state
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*
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* Return: 0 if all goes well, else appropriate error message
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*/
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int ti_sci_device_get_state(uint32_t id, uint32_t *clcnt, uint32_t *resets,
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uint8_t *p_state, uint8_t *c_state)
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{
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struct ti_sci_msg_req_get_device_state req;
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struct ti_sci_msg_resp_get_device_state resp;
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struct ti_sci_xfer xfer;
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int ret;
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if (!clcnt && !resets && !p_state && !c_state)
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return -EINVAL;
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ret = ti_sci_setup_one_xfer(TI_SCI_MSG_GET_DEVICE_STATE, 0,
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&req, sizeof(req),
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&resp, sizeof(resp),
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&xfer);
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if (ret) {
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ERROR("Message alloc failed (%d)\n", ret);
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return ret;
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}
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req.id = id;
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ret = ti_sci_do_xfer(&xfer);
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if (ret) {
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ERROR("Transfer send failed (%d)\n", ret);
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return ret;
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}
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if (!ti_sci_is_response_ack(&resp))
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return -ENODEV;
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if (clcnt)
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*clcnt = resp.context_loss_count;
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if (resets)
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*resets = resp.resets;
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if (p_state)
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*p_state = resp.programmed_state;
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if (c_state)
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*c_state = resp.current_state;
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return 0;
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}
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/**
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* ti_sci_device_get() - Request for device managed by TISCI
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*
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* @id: Device Identifier
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*
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* Request for the device - NOTE: the client MUST maintain integrity of
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* usage count by balancing get_device with put_device. No refcounting is
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* managed by driver for that purpose.
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*
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* NOTE: The request is for exclusive access for the processor.
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*
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* Return: 0 if all goes well, else appropriate error message
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*/
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int ti_sci_device_get(uint32_t id)
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{
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return ti_sci_device_set_state(id,
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MSG_FLAG_DEVICE_EXCLUSIVE,
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MSG_DEVICE_SW_STATE_ON);
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}
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/**
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* ti_sci_device_idle() - Idle a device managed by TISCI
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*
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* @id: Device Identifier
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*
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* Request for the device - NOTE: the client MUST maintain integrity of
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* usage count by balancing get_device with put_device. No refcounting is
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* managed by driver for that purpose.
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*
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* Return: 0 if all goes well, else appropriate error message
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*/
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int ti_sci_device_idle(uint32_t id)
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{
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return ti_sci_device_set_state(id,
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MSG_FLAG_DEVICE_EXCLUSIVE,
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MSG_DEVICE_SW_STATE_RETENTION);
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}
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/**
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* ti_sci_device_put() - Release a device managed by TISCI
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*
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* @id: Device Identifier
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*
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* Request for the device - NOTE: the client MUST maintain integrity of
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* usage count by balancing get_device with put_device. No refcounting is
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* managed by driver for that purpose.
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*
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* Return: 0 if all goes well, else appropriate error message
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*/
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int ti_sci_device_put(uint32_t id)
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{
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return ti_sci_device_set_state(id, 0, MSG_DEVICE_SW_STATE_AUTO_OFF);
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}
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/**
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* ti_sci_device_is_valid() - Is the device valid
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*
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* @id: Device Identifier
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*
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* Return: 0 if all goes well and the device ID is valid, else return
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* appropriate error
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*/
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int ti_sci_device_is_valid(uint32_t id)
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{
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uint8_t unused;
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/* check the device state which will also tell us if the ID is valid */
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return ti_sci_device_get_state(id, NULL, NULL, NULL, &unused);
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}
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/**
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* ti_sci_device_get_clcnt() - Get context loss counter
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*
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* @id: Device Identifier
|
|
|
|
* @count: Pointer to Context Loss counter to populate
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_device_get_clcnt(uint32_t id, uint32_t *count)
|
|
|
|
{
|
|
|
|
return ti_sci_device_get_state(id, count, NULL, NULL, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_device_is_idle() - Check if the device is requested to be idle
|
|
|
|
*
|
|
|
|
* @id: Device Identifier
|
|
|
|
* @r_state: true if requested to be idle
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_device_is_idle(uint32_t id, bool *r_state)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
uint8_t state;
|
|
|
|
|
|
|
|
if (!r_state)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ret = ti_sci_device_get_state(id, NULL, NULL, &state, NULL);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
*r_state = (state == MSG_DEVICE_SW_STATE_RETENTION);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_device_is_stop() - Check if the device is requested to be stopped
|
|
|
|
*
|
|
|
|
* @id: Device Identifier
|
|
|
|
* @r_state: true if requested to be stopped
|
|
|
|
* @curr_state: true if currently stopped
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_device_is_stop(uint32_t id, bool *r_state, bool *curr_state)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
uint8_t p_state, c_state;
|
|
|
|
|
|
|
|
if (!r_state && !curr_state)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ret = ti_sci_device_get_state(id, NULL, NULL, &p_state, &c_state);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
if (r_state)
|
|
|
|
*r_state = (p_state == MSG_DEVICE_SW_STATE_AUTO_OFF);
|
|
|
|
if (curr_state)
|
|
|
|
*curr_state = (c_state == MSG_DEVICE_HW_STATE_OFF);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_device_is_on() - Check if the device is requested to be ON
|
|
|
|
*
|
|
|
|
* @id: Device Identifier
|
|
|
|
* @r_state: true if requested to be ON
|
|
|
|
* @curr_state: true if currently ON and active
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_device_is_on(uint32_t id, bool *r_state, bool *curr_state)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
uint8_t p_state, c_state;
|
|
|
|
|
|
|
|
if (!r_state && !curr_state)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ret =
|
|
|
|
ti_sci_device_get_state(id, NULL, NULL, &p_state, &c_state);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
if (r_state)
|
|
|
|
*r_state = (p_state == MSG_DEVICE_SW_STATE_ON);
|
|
|
|
if (curr_state)
|
|
|
|
*curr_state = (c_state == MSG_DEVICE_HW_STATE_ON);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_device_is_trans() - Check if the device is currently transitioning
|
|
|
|
*
|
|
|
|
* @id: Device Identifier
|
|
|
|
* @curr_state: true if currently transitioning
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_device_is_trans(uint32_t id, bool *curr_state)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
uint8_t state;
|
|
|
|
|
|
|
|
if (!curr_state)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ret = ti_sci_device_get_state(id, NULL, NULL, NULL, &state);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
*curr_state = (state == MSG_DEVICE_HW_STATE_TRANS);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_device_set_resets() - Set resets for device managed by TISCI
|
|
|
|
*
|
|
|
|
* @id: Device Identifier
|
|
|
|
* @reset_state: Device specific reset bit field
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_device_set_resets(uint32_t id, uint32_t reset_state)
|
|
|
|
{
|
|
|
|
struct ti_sci_msg_req_set_device_resets req;
|
|
|
|
struct ti_sci_msg_hdr resp;
|
|
|
|
|
|
|
|
struct ti_sci_xfer xfer;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = ti_sci_setup_one_xfer(TI_SCI_MSG_SET_DEVICE_RESETS,
|
|
|
|
TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
|
|
|
|
&req, sizeof(req),
|
|
|
|
&resp, sizeof(resp),
|
|
|
|
&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Message alloc failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
req.id = id;
|
|
|
|
req.resets = reset_state;
|
|
|
|
|
|
|
|
ret = ti_sci_do_xfer(&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Transfer send failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!ti_sci_is_response_ack(&resp))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_device_get_resets() - Get reset state for device managed by TISCI
|
|
|
|
*
|
|
|
|
* @id: Device Identifier
|
|
|
|
* @reset_state: Pointer to reset state to populate
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_device_get_resets(uint32_t id, uint32_t *reset_state)
|
|
|
|
{
|
|
|
|
return ti_sci_device_get_state(id, NULL, reset_state, NULL, NULL);
|
|
|
|
}
|
|
|
|
|
2018-05-04 20:06:11 +01:00
|
|
|
/**
|
|
|
|
* ti_sci_clock_set_state() - Set clock state helper
|
|
|
|
*
|
|
|
|
* @dev_id: Device identifier this request is for
|
|
|
|
* @clk_id: Clock identifier for the device for this request,
|
|
|
|
* Each device has its own set of clock inputs, This indexes
|
|
|
|
* which clock input to modify
|
|
|
|
* @flags: Header flags as needed
|
|
|
|
* @state: State to request for the clock
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_clock_set_state(uint32_t dev_id, uint8_t clk_id,
|
|
|
|
uint32_t flags, uint8_t state)
|
|
|
|
{
|
|
|
|
struct ti_sci_msg_req_set_clock_state req;
|
|
|
|
struct ti_sci_msg_hdr resp;
|
|
|
|
|
|
|
|
struct ti_sci_xfer xfer;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = ti_sci_setup_one_xfer(TI_SCI_MSG_SET_CLOCK_STATE,
|
|
|
|
flags | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
|
|
|
|
&req, sizeof(req),
|
|
|
|
&resp, sizeof(resp),
|
|
|
|
&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Message alloc failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
req.dev_id = dev_id;
|
|
|
|
req.clk_id = clk_id;
|
|
|
|
req.request_state = state;
|
|
|
|
|
|
|
|
ret = ti_sci_do_xfer(&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Transfer send failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!ti_sci_is_response_ack(&resp))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_clock_get_state() - Get clock state helper
|
|
|
|
*
|
|
|
|
* @dev_id: Device identifier this request is for
|
|
|
|
* @clk_id: Clock identifier for the device for this request.
|
|
|
|
* Each device has its own set of clock inputs. This indexes
|
|
|
|
* which clock input to modify.
|
|
|
|
* @programmed_state: State requested for clock to move to
|
|
|
|
* @current_state: State that the clock is currently in
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_clock_get_state(uint32_t dev_id, uint8_t clk_id,
|
|
|
|
uint8_t *programmed_state,
|
|
|
|
uint8_t *current_state)
|
|
|
|
{
|
|
|
|
struct ti_sci_msg_req_get_clock_state req;
|
|
|
|
struct ti_sci_msg_resp_get_clock_state resp;
|
|
|
|
|
|
|
|
struct ti_sci_xfer xfer;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!programmed_state && !current_state)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ret = ti_sci_setup_one_xfer(TI_SCI_MSG_GET_CLOCK_STATE,
|
|
|
|
TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
|
|
|
|
&req, sizeof(req),
|
|
|
|
&resp, sizeof(resp),
|
|
|
|
&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Message alloc failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
req.dev_id = dev_id;
|
|
|
|
req.clk_id = clk_id;
|
|
|
|
|
|
|
|
ret = ti_sci_do_xfer(&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Transfer send failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!ti_sci_is_response_ack(&resp))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
if (programmed_state)
|
|
|
|
*programmed_state = resp.programmed_state;
|
|
|
|
if (current_state)
|
|
|
|
*current_state = resp.current_state;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_clock_get() - Get control of a clock from TI SCI
|
|
|
|
|
|
|
|
* @dev_id: Device identifier this request is for
|
|
|
|
* @clk_id: Clock identifier for the device for this request.
|
|
|
|
* Each device has its own set of clock inputs. This indexes
|
|
|
|
* which clock input to modify.
|
|
|
|
* @needs_ssc: 'true' iff Spread Spectrum clock is desired
|
|
|
|
* @can_change_freq: 'true' iff frequency change is desired
|
|
|
|
* @enable_input_term: 'true' iff input termination is desired
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_clock_get(uint32_t dev_id, uint8_t clk_id,
|
|
|
|
bool needs_ssc, bool can_change_freq,
|
|
|
|
bool enable_input_term)
|
|
|
|
{
|
|
|
|
uint32_t flags = 0;
|
|
|
|
|
|
|
|
flags |= needs_ssc ? MSG_FLAG_CLOCK_ALLOW_SSC : 0;
|
|
|
|
flags |= can_change_freq ? MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE : 0;
|
|
|
|
flags |= enable_input_term ? MSG_FLAG_CLOCK_INPUT_TERM : 0;
|
|
|
|
|
|
|
|
return ti_sci_clock_set_state(dev_id, clk_id, flags,
|
|
|
|
MSG_CLOCK_SW_STATE_REQ);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_clock_idle() - Idle a clock which is in our control
|
|
|
|
|
|
|
|
* @dev_id: Device identifier this request is for
|
|
|
|
* @clk_id: Clock identifier for the device for this request.
|
|
|
|
* Each device has its own set of clock inputs. This indexes
|
|
|
|
* which clock input to modify.
|
|
|
|
*
|
|
|
|
* NOTE: This clock must have been requested by get_clock previously.
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_clock_idle(uint32_t dev_id, uint8_t clk_id)
|
|
|
|
{
|
|
|
|
return ti_sci_clock_set_state(dev_id, clk_id, 0,
|
|
|
|
MSG_CLOCK_SW_STATE_UNREQ);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_clock_put() - Release a clock from our control
|
|
|
|
*
|
|
|
|
* @dev_id: Device identifier this request is for
|
|
|
|
* @clk_id: Clock identifier for the device for this request.
|
|
|
|
* Each device has its own set of clock inputs. This indexes
|
|
|
|
* which clock input to modify.
|
|
|
|
*
|
|
|
|
* NOTE: This clock must have been requested by get_clock previously.
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_clock_put(uint32_t dev_id, uint8_t clk_id)
|
|
|
|
{
|
|
|
|
return ti_sci_clock_set_state(dev_id, clk_id, 0,
|
|
|
|
MSG_CLOCK_SW_STATE_AUTO);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_clock_is_auto() - Is the clock being auto managed
|
|
|
|
*
|
|
|
|
* @dev_id: Device identifier this request is for
|
|
|
|
* @clk_id: Clock identifier for the device for this request.
|
|
|
|
* Each device has its own set of clock inputs. This indexes
|
|
|
|
* which clock input to modify.
|
|
|
|
* @req_state: state indicating if the clock is auto managed
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_clock_is_auto(uint32_t dev_id, uint8_t clk_id, bool *req_state)
|
|
|
|
{
|
|
|
|
uint8_t state = 0;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!req_state)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ret = ti_sci_clock_get_state(dev_id, clk_id, &state, NULL);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
*req_state = (state == MSG_CLOCK_SW_STATE_AUTO);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_clock_is_on() - Is the clock ON
|
|
|
|
*
|
|
|
|
* @dev_id: Device identifier this request is for
|
|
|
|
* @clk_id: Clock identifier for the device for this request.
|
|
|
|
* Each device has its own set of clock inputs. This indexes
|
|
|
|
* which clock input to modify.
|
|
|
|
* @req_state: state indicating if the clock is managed by us and enabled
|
|
|
|
* @curr_state: state indicating if the clock is ready for operation
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_clock_is_on(uint32_t dev_id, uint8_t clk_id,
|
|
|
|
bool *req_state, bool *curr_state)
|
|
|
|
{
|
|
|
|
uint8_t c_state = 0, r_state = 0;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!req_state && !curr_state)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ret = ti_sci_clock_get_state(dev_id, clk_id, &r_state, &c_state);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
if (req_state)
|
|
|
|
*req_state = (r_state == MSG_CLOCK_SW_STATE_REQ);
|
|
|
|
if (curr_state)
|
|
|
|
*curr_state = (c_state == MSG_CLOCK_HW_STATE_READY);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_clock_is_off() - Is the clock OFF
|
|
|
|
*
|
|
|
|
* @dev_id: Device identifier this request is for
|
|
|
|
* @clk_id: Clock identifier for the device for this request.
|
|
|
|
* Each device has its own set of clock inputs. This indexes
|
|
|
|
* which clock input to modify.
|
|
|
|
* @req_state: state indicating if the clock is managed by us and disabled
|
|
|
|
* @curr_state: state indicating if the clock is NOT ready for operation
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_clock_is_off(uint32_t dev_id, uint8_t clk_id,
|
|
|
|
bool *req_state, bool *curr_state)
|
|
|
|
{
|
|
|
|
uint8_t c_state = 0, r_state = 0;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!req_state && !curr_state)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ret = ti_sci_clock_get_state(dev_id, clk_id, &r_state, &c_state);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
if (req_state)
|
|
|
|
*req_state = (r_state == MSG_CLOCK_SW_STATE_UNREQ);
|
|
|
|
if (curr_state)
|
|
|
|
*curr_state = (c_state == MSG_CLOCK_HW_STATE_NOT_READY);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_clock_set_parent() - Set the clock source of a specific device clock
|
|
|
|
*
|
|
|
|
* @dev_id: Device identifier this request is for
|
|
|
|
* @clk_id: Clock identifier for the device for this request.
|
|
|
|
* Each device has its own set of clock inputs. This indexes
|
|
|
|
* which clock input to modify.
|
|
|
|
* @parent_id: Parent clock identifier to set
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_clock_set_parent(uint32_t dev_id, uint8_t clk_id, uint8_t parent_id)
|
|
|
|
{
|
|
|
|
struct ti_sci_msg_req_set_clock_parent req;
|
|
|
|
struct ti_sci_msg_hdr resp;
|
|
|
|
|
|
|
|
struct ti_sci_xfer xfer;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = ti_sci_setup_one_xfer(TI_SCI_MSG_SET_CLOCK_PARENT,
|
|
|
|
TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
|
|
|
|
&req, sizeof(req),
|
|
|
|
&resp, sizeof(resp),
|
|
|
|
&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Message alloc failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
req.dev_id = dev_id;
|
|
|
|
req.clk_id = clk_id;
|
|
|
|
req.parent_id = parent_id;
|
|
|
|
|
|
|
|
ret = ti_sci_do_xfer(&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Transfer send failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!ti_sci_is_response_ack(&resp))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_clock_get_parent() - Get current parent clock source
|
|
|
|
*
|
|
|
|
* @dev_id: Device identifier this request is for
|
|
|
|
* @clk_id: Clock identifier for the device for this request.
|
|
|
|
* Each device has its own set of clock inputs. This indexes
|
|
|
|
* which clock input to modify.
|
|
|
|
* @parent_id: Current clock parent
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_clock_get_parent(uint32_t dev_id, uint8_t clk_id, uint8_t *parent_id)
|
|
|
|
{
|
|
|
|
struct ti_sci_msg_req_get_clock_parent req;
|
|
|
|
struct ti_sci_msg_resp_get_clock_parent resp;
|
|
|
|
|
|
|
|
struct ti_sci_xfer xfer;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = ti_sci_setup_one_xfer(TI_SCI_MSG_GET_CLOCK_PARENT,
|
|
|
|
TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
|
|
|
|
&req, sizeof(req),
|
|
|
|
&resp, sizeof(resp),
|
|
|
|
&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Message alloc failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
req.dev_id = dev_id;
|
|
|
|
req.clk_id = clk_id;
|
|
|
|
|
|
|
|
ret = ti_sci_do_xfer(&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Transfer send failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!ti_sci_is_response_ack(&resp))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
*parent_id = resp.parent_id;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_clock_get_num_parents() - Get num parents of the current clk source
|
|
|
|
*
|
|
|
|
* @dev_id: Device identifier this request is for
|
|
|
|
* @clk_id: Clock identifier for the device for this request.
|
|
|
|
* Each device has its own set of clock inputs. This indexes
|
|
|
|
* which clock input to modify.
|
|
|
|
* @num_parents: Returns he number of parents to the current clock.
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_clock_get_num_parents(uint32_t dev_id, uint8_t clk_id,
|
|
|
|
uint8_t *num_parents)
|
|
|
|
{
|
|
|
|
struct ti_sci_msg_req_get_clock_num_parents req;
|
|
|
|
struct ti_sci_msg_resp_get_clock_num_parents resp;
|
|
|
|
|
|
|
|
struct ti_sci_xfer xfer;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = ti_sci_setup_one_xfer(TI_SCI_MSG_GET_NUM_CLOCK_PARENTS,
|
|
|
|
TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
|
|
|
|
&req, sizeof(req),
|
|
|
|
&resp, sizeof(resp),
|
|
|
|
&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Message alloc failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
req.dev_id = dev_id;
|
|
|
|
req.clk_id = clk_id;
|
|
|
|
|
|
|
|
ret = ti_sci_do_xfer(&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Transfer send failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!ti_sci_is_response_ack(&resp))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
*num_parents = resp.num_parents;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_clock_get_match_freq() - Find a good match for frequency
|
|
|
|
*
|
|
|
|
* @dev_id: Device identifier this request is for
|
|
|
|
* @clk_id: Clock identifier for the device for this request.
|
|
|
|
* Each device has its own set of clock inputs. This indexes
|
|
|
|
* which clock input to modify.
|
|
|
|
* @min_freq: The minimum allowable frequency in Hz. This is the minimum
|
|
|
|
* allowable programmed frequency and does not account for clock
|
|
|
|
* tolerances and jitter.
|
|
|
|
* @target_freq: The target clock frequency in Hz. A frequency will be
|
|
|
|
* processed as close to this target frequency as possible.
|
|
|
|
* @max_freq: The maximum allowable frequency in Hz. This is the maximum
|
|
|
|
* allowable programmed frequency and does not account for clock
|
|
|
|
* tolerances and jitter.
|
|
|
|
* @match_freq: Frequency match in Hz response.
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_clock_get_match_freq(uint32_t dev_id, uint8_t clk_id,
|
|
|
|
uint64_t min_freq, uint64_t target_freq,
|
|
|
|
uint64_t max_freq, uint64_t *match_freq)
|
|
|
|
{
|
|
|
|
struct ti_sci_msg_req_query_clock_freq req;
|
|
|
|
struct ti_sci_msg_resp_query_clock_freq resp;
|
|
|
|
|
|
|
|
struct ti_sci_xfer xfer;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = ti_sci_setup_one_xfer(TI_SCI_MSG_QUERY_CLOCK_FREQ,
|
|
|
|
TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
|
|
|
|
&req, sizeof(req),
|
|
|
|
&resp, sizeof(resp),
|
|
|
|
&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Message alloc failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
req.dev_id = dev_id;
|
|
|
|
req.clk_id = clk_id;
|
|
|
|
req.min_freq_hz = min_freq;
|
|
|
|
req.target_freq_hz = target_freq;
|
|
|
|
req.max_freq_hz = max_freq;
|
|
|
|
|
|
|
|
ret = ti_sci_do_xfer(&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Transfer send failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!ti_sci_is_response_ack(&resp))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
*match_freq = resp.freq_hz;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_clock_set_freq() - Set a frequency for clock
|
|
|
|
*
|
|
|
|
* @dev_id: Device identifier this request is for
|
|
|
|
* @clk_id: Clock identifier for the device for this request.
|
|
|
|
* Each device has its own set of clock inputs. This indexes
|
|
|
|
* which clock input to modify.
|
|
|
|
* @min_freq: The minimum allowable frequency in Hz. This is the minimum
|
|
|
|
* allowable programmed frequency and does not account for clock
|
|
|
|
* tolerances and jitter.
|
|
|
|
* @target_freq: The target clock frequency in Hz. A frequency will be
|
|
|
|
* processed as close to this target frequency as possible.
|
|
|
|
* @max_freq: The maximum allowable frequency in Hz. This is the maximum
|
|
|
|
* allowable programmed frequency and does not account for clock
|
|
|
|
* tolerances and jitter.
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_clock_set_freq(uint32_t dev_id, uint8_t clk_id, uint64_t min_freq,
|
|
|
|
uint64_t target_freq, uint64_t max_freq)
|
|
|
|
{
|
|
|
|
struct ti_sci_msg_req_set_clock_freq req;
|
|
|
|
struct ti_sci_msg_hdr resp;
|
|
|
|
|
|
|
|
struct ti_sci_xfer xfer;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = ti_sci_setup_one_xfer(TI_SCI_MSG_SET_CLOCK_FREQ,
|
|
|
|
TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
|
|
|
|
&req, sizeof(req),
|
|
|
|
&resp, sizeof(resp),
|
|
|
|
&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Message alloc failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
req.dev_id = dev_id;
|
|
|
|
req.clk_id = clk_id;
|
|
|
|
req.min_freq_hz = min_freq;
|
|
|
|
req.target_freq_hz = target_freq;
|
|
|
|
req.max_freq_hz = max_freq;
|
|
|
|
|
|
|
|
ret = ti_sci_do_xfer(&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Transfer send failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!ti_sci_is_response_ack(&resp))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ti_sci_clock_get_freq() - Get current frequency
|
|
|
|
*
|
|
|
|
* @dev_id: Device identifier this request is for
|
|
|
|
* @clk_id: Clock identifier for the device for this request.
|
|
|
|
* Each device has its own set of clock inputs. This indexes
|
|
|
|
* which clock input to modify.
|
|
|
|
* @freq: Currently frequency in Hz
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_clock_get_freq(uint32_t dev_id, uint8_t clk_id, uint64_t *freq)
|
|
|
|
{
|
|
|
|
struct ti_sci_msg_req_get_clock_freq req;
|
|
|
|
struct ti_sci_msg_resp_get_clock_freq resp;
|
|
|
|
|
|
|
|
struct ti_sci_xfer xfer;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = ti_sci_setup_one_xfer(TI_SCI_MSG_GET_CLOCK_FREQ,
|
|
|
|
TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
|
|
|
|
&req, sizeof(req),
|
|
|
|
&resp, sizeof(resp),
|
|
|
|
&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Message alloc failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
req.dev_id = dev_id;
|
|
|
|
req.clk_id = clk_id;
|
|
|
|
|
|
|
|
ret = ti_sci_do_xfer(&xfer);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Transfer send failed (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!ti_sci_is_response_ack(&resp))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
*freq = resp.freq_hz;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2018-05-04 20:06:09 +01:00
|
|
|
/**
|
|
|
|
* ti_sci_init() - Basic initialization
|
|
|
|
*
|
|
|
|
* Return: 0 if all goes well, else appropriate error message
|
|
|
|
*/
|
|
|
|
int ti_sci_init(void)
|
|
|
|
{
|
|
|
|
struct ti_sci_msg_resp_version rev_info;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = ti_sci_get_revision(&rev_info);
|
|
|
|
if (ret) {
|
|
|
|
ERROR("Unable to communicate with control firmware (%d)\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
INFO("SYSFW ABI: %d.%d (firmware rev 0x%04x '%s')\n",
|
|
|
|
rev_info.abi_major, rev_info.abi_minor,
|
|
|
|
rev_info.firmware_revision,
|
|
|
|
rev_info.firmware_description);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|