/* * Texas Instruments System Control Interface Driver * Based on Linux and U-Boot implementation * * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ * * SPDX-License-Identifier: BSD-3-Clause */ #include #include #include #include #include #include #include #include "ti_sci_protocol.h" #include "ti_sci.h" /** * struct ti_sci_desc - Description of SoC integration * @host_id: Host identifier representing the compute entity * @max_msg_size: Maximum size of data per message that can be handled */ struct ti_sci_desc { uint8_t host_id; int max_msg_size; }; /** * struct ti_sci_info - Structure representing a TI SCI instance * @desc: SoC description for this instance * @seq: Seq id used for verification for tx and rx message */ struct ti_sci_info { const struct ti_sci_desc desc; uint8_t seq; }; static struct ti_sci_info info = { .desc = { .host_id = TI_SCI_HOST_ID, .max_msg_size = TI_SCI_MAX_MESSAGE_SIZE, }, .seq = 0x0a, }; /** * struct ti_sci_xfer - Structure representing a message flow * @tx_message: Transmit message * @rx_message: Receive message */ struct ti_sci_xfer { struct k3_sec_proxy_msg tx_message; struct k3_sec_proxy_msg rx_message; }; /** * ti_sci_setup_one_xfer() - Setup one message type * * @msg_type: Message type * @msg_flags: Flag to set for the message * @tx_buf: Buffer to be sent to mailbox channel * @tx_message_size: transmit message size * @rx_buf: Buffer to be received from mailbox channel * @rx_message_size: receive message size * * Helper function which is used by various command functions that are * exposed to clients of this driver for allocating a message traffic event. * * Return: 0 if all goes well, else appropriate error message */ static int ti_sci_setup_one_xfer(uint16_t msg_type, uint32_t msg_flags, void *tx_buf, size_t tx_message_size, void *rx_buf, size_t rx_message_size, struct ti_sci_xfer *xfer) { struct ti_sci_msg_hdr *hdr; /* Ensure we have sane transfer sizes */ if (rx_message_size > info.desc.max_msg_size || tx_message_size > info.desc.max_msg_size || rx_message_size < sizeof(*hdr) || tx_message_size < sizeof(*hdr)) return -ERANGE; info.seq++; hdr = (struct ti_sci_msg_hdr *)tx_buf; hdr->seq = info.seq; hdr->type = msg_type; hdr->host = info.desc.host_id; hdr->flags = msg_flags; xfer->tx_message.buf = tx_buf; xfer->tx_message.len = tx_message_size; xfer->rx_message.buf = rx_buf; xfer->rx_message.len = rx_message_size; return 0; } /** * ti_sci_get_response() - Receive response from mailbox channel * * @xfer: Transfer to initiate and wait for response * @chan: Channel to receive the response * * Return: 0 if all goes well, else appropriate error message */ static inline int ti_sci_get_response(struct ti_sci_xfer *xfer, enum k3_sec_proxy_chan_id chan) { struct k3_sec_proxy_msg *msg = &xfer->rx_message; struct ti_sci_msg_hdr *hdr; int ret; /* Receive the response */ ret = k3_sec_proxy_recv(chan, msg); if (ret) { ERROR("Message receive failed (%d)\n", ret); return ret; } /* msg is updated by Secure Proxy driver */ hdr = (struct ti_sci_msg_hdr *)msg->buf; /* Sanity check for message response */ if (hdr->seq != info.seq) { ERROR("Message for %d is not expected\n", hdr->seq); return -EINVAL; } if (msg->len > info.desc.max_msg_size) { ERROR("Unable to handle %lu xfer (max %d)\n", msg->len, info.desc.max_msg_size); return -EINVAL; } return 0; } /** * ti_sci_do_xfer() - Do one transfer * * @xfer: Transfer to initiate and wait for response * * Return: 0 if all goes well, else appropriate error message */ static inline int ti_sci_do_xfer(struct ti_sci_xfer *xfer) { struct k3_sec_proxy_msg *msg = &xfer->tx_message; int ret; /* Send the message */ ret = k3_sec_proxy_send(SP_HIGH_PRIORITY, msg); if (ret) { ERROR("Message sending failed (%d)\n", ret); return ret; } ret = ti_sci_get_response(xfer, SP_RESPONSE); if (ret) { ERROR("Failed to get response (%d)\n", ret); return ret; } return 0; } /** * ti_sci_get_revision() - Get the revision of the SCI entity * * Updates the SCI information in the internal data structure. * * Return: 0 if all goes well, else appropriate error message */ int ti_sci_get_revision(struct ti_sci_msg_resp_version *rev_info) { struct ti_sci_msg_hdr hdr; struct ti_sci_xfer xfer; int ret; ret = ti_sci_setup_one_xfer(TI_SCI_MSG_VERSION, 0x0, &hdr, sizeof(hdr), rev_info, sizeof(*rev_info), &xfer); if (ret) { ERROR("Message alloc failed (%d)\n", ret); return ret; } ret = ti_sci_do_xfer(&xfer); if (ret) { ERROR("Transfer send failed (%d)\n", ret); return ret; } return 0; } /** * ti_sci_is_response_ack() - Generic ACK/NACK message check * * @r: pointer to response buffer * * Return: true if the response was an ACK, else returns false */ static inline bool ti_sci_is_response_ack(void *r) { struct ti_sci_msg_hdr *hdr = r; return hdr->flags & TI_SCI_FLAG_RESP_GENERIC_ACK ? true : false; } /** * ti_sci_device_set_state() - Set device state * * @id: Device identifier * @flags: flags to setup for the device * @state: State to move the device to * * Return: 0 if all goes well, else appropriate error message */ int ti_sci_device_set_state(uint32_t id, uint32_t flags, uint8_t state) { struct ti_sci_msg_req_set_device_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_DEVICE_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.id = id; req.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_device_get_state() - Get device state * * @id: Device Identifier * @clcnt: Pointer to Context Loss Count * @resets: pointer to resets * @p_state: pointer to p_state * @c_state: pointer to c_state * * Return: 0 if all goes well, else appropriate error message */ int ti_sci_device_get_state(uint32_t id, uint32_t *clcnt, uint32_t *resets, uint8_t *p_state, uint8_t *c_state) { struct ti_sci_msg_req_get_device_state req; struct ti_sci_msg_resp_get_device_state resp; struct ti_sci_xfer xfer; int ret; if (!clcnt && !resets && !p_state && !c_state) return -EINVAL; ret = ti_sci_setup_one_xfer(TI_SCI_MSG_GET_DEVICE_STATE, 0, &req, sizeof(req), &resp, sizeof(resp), &xfer); if (ret) { ERROR("Message alloc failed (%d)\n", ret); return ret; } req.id = 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 (clcnt) *clcnt = resp.context_loss_count; if (resets) *resets = resp.resets; if (p_state) *p_state = resp.programmed_state; if (c_state) *c_state = resp.current_state; return 0; } /** * ti_sci_device_get() - Request for device managed by TISCI * * @id: Device Identifier * * Request for the device - NOTE: the client MUST maintain integrity of * usage count by balancing get_device with put_device. No refcounting is * managed by driver for that purpose. * * NOTE: The request is for exclusive access for the processor. * * Return: 0 if all goes well, else appropriate error message */ int ti_sci_device_get(uint32_t id) { return ti_sci_device_set_state(id, MSG_FLAG_DEVICE_EXCLUSIVE, MSG_DEVICE_SW_STATE_ON); } /** * ti_sci_device_idle() - Idle a device managed by TISCI * * @id: Device Identifier * * Request for the device - NOTE: the client MUST maintain integrity of * usage count by balancing get_device with put_device. No refcounting is * managed by driver for that purpose. * * Return: 0 if all goes well, else appropriate error message */ int ti_sci_device_idle(uint32_t id) { return ti_sci_device_set_state(id, MSG_FLAG_DEVICE_EXCLUSIVE, MSG_DEVICE_SW_STATE_RETENTION); } /** * ti_sci_device_put() - Release a device managed by TISCI * * @id: Device Identifier * * Request for the device - NOTE: the client MUST maintain integrity of * usage count by balancing get_device with put_device. No refcounting is * managed by driver for that purpose. * * Return: 0 if all goes well, else appropriate error message */ int ti_sci_device_put(uint32_t id) { return ti_sci_device_set_state(id, 0, MSG_DEVICE_SW_STATE_AUTO_OFF); } /** * ti_sci_device_is_valid() - Is the device valid * * @id: Device Identifier * * Return: 0 if all goes well and the device ID is valid, else return * appropriate error */ int ti_sci_device_is_valid(uint32_t id) { uint8_t unused; /* check the device state which will also tell us if the ID is valid */ return ti_sci_device_get_state(id, NULL, NULL, NULL, &unused); } /** * ti_sci_device_get_clcnt() - Get context loss counter * * @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); } /** * 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; } /** * 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; }