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-rw-r--r--drivers/firmware/ti_sci.h289
1 files changed, 289 insertions, 0 deletions
diff --git a/drivers/firmware/ti_sci.h b/drivers/firmware/ti_sci.h
index 29ce0532a7ca..f69907cfc128 100644
--- a/drivers/firmware/ti_sci.h
+++ b/drivers/firmware/ti_sci.h
@@ -52,6 +52,16 @@
#define TI_SCI_MSG_GET_DEVICE_STATE 0x0201
#define TI_SCI_MSG_SET_DEVICE_RESETS 0x0202
+/* Clock requests */
+#define TI_SCI_MSG_SET_CLOCK_STATE 0x0100
+#define TI_SCI_MSG_GET_CLOCK_STATE 0x0101
+#define TI_SCI_MSG_SET_CLOCK_PARENT 0x0102
+#define TI_SCI_MSG_GET_CLOCK_PARENT 0x0103
+#define TI_SCI_MSG_GET_NUM_CLOCK_PARENTS 0x0104
+#define TI_SCI_MSG_SET_CLOCK_FREQ 0x010c
+#define TI_SCI_MSG_QUERY_CLOCK_FREQ 0x010d
+#define TI_SCI_MSG_GET_CLOCK_FREQ 0x010e
+
/**
* struct ti_sci_msg_hdr - Generic Message Header for All messages and responses
* @type: Type of messages: One of TI_SCI_MSG* values
@@ -188,4 +198,283 @@ struct ti_sci_msg_req_set_device_resets {
u32 resets;
} __packed;
+/**
+ * struct ti_sci_msg_req_set_clock_state - Request to setup a Clock state
+ * @hdr: Generic Header, Certain flags can be set specific to the clocks:
+ * MSG_FLAG_CLOCK_ALLOW_SSC: Allow this clock to be modified
+ * via spread spectrum clocking.
+ * MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE: Allow this clock's
+ * frequency to be changed while it is running so long as it
+ * is within the min/max limits.
+ * MSG_FLAG_CLOCK_INPUT_TERM: Enable input termination, this
+ * is only applicable to clock inputs on the SoC pseudo-device.
+ * @dev_id: Device identifier this request is for
+ * @clk_id: Clock identifier for the device for this request.
+ * Each device has it's own set of clock inputs. This indexes
+ * which clock input to modify.
+ * @request_state: Request the state for the clock to be set to.
+ * MSG_CLOCK_SW_STATE_UNREQ: The IP does not require this clock,
+ * it can be disabled, regardless of the state of the device
+ * MSG_CLOCK_SW_STATE_AUTO: Allow the System Controller to
+ * automatically manage the state of this clock. If the device
+ * is enabled, then the clock is enabled. If the device is set
+ * to off or retention, then the clock is internally set as not
+ * being required by the device.(default)
+ * MSG_CLOCK_SW_STATE_REQ: Configure the clock to be enabled,
+ * regardless of the state of the device.
+ *
+ * Normally, all required clocks are managed by TISCI entity, this is used
+ * only for specific control *IF* required. Auto managed state is
+ * MSG_CLOCK_SW_STATE_AUTO, in other states, TISCI entity assume remote
+ * will explicitly control.
+ *
+ * Request type is TI_SCI_MSG_SET_CLOCK_STATE, response is a generic
+ * ACK or NACK message.
+ */
+struct ti_sci_msg_req_set_clock_state {
+ /* Additional hdr->flags options */
+#define MSG_FLAG_CLOCK_ALLOW_SSC TI_SCI_MSG_FLAG(8)
+#define MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE TI_SCI_MSG_FLAG(9)
+#define MSG_FLAG_CLOCK_INPUT_TERM TI_SCI_MSG_FLAG(10)
+ struct ti_sci_msg_hdr hdr;
+ u32 dev_id;
+ u8 clk_id;
+#define MSG_CLOCK_SW_STATE_UNREQ 0
+#define MSG_CLOCK_SW_STATE_AUTO 1
+#define MSG_CLOCK_SW_STATE_REQ 2
+ u8 request_state;
+} __packed;
+
+/**
+ * struct ti_sci_msg_req_get_clock_state - Request for clock state
+ * @hdr: Generic Header
+ * @dev_id: Device identifier this request is for
+ * @clk_id: Clock identifier for the device for this request.
+ * Each device has it's own set of clock inputs. This indexes
+ * which clock input to get state of.
+ *
+ * Request type is TI_SCI_MSG_GET_CLOCK_STATE, response is state
+ * of the clock
+ */
+struct ti_sci_msg_req_get_clock_state {
+ struct ti_sci_msg_hdr hdr;
+ u32 dev_id;
+ u8 clk_id;
+} __packed;
+
+/**
+ * struct ti_sci_msg_resp_get_clock_state - Response to get clock state
+ * @hdr: Generic Header
+ * @programmed_state: Any programmed state of the clock. This is one of
+ * MSG_CLOCK_SW_STATE* values.
+ * @current_state: Current state of the clock. This is one of:
+ * MSG_CLOCK_HW_STATE_NOT_READY: Clock is not ready
+ * MSG_CLOCK_HW_STATE_READY: Clock is ready
+ *
+ * Response to TI_SCI_MSG_GET_CLOCK_STATE.
+ */
+struct ti_sci_msg_resp_get_clock_state {
+ struct ti_sci_msg_hdr hdr;
+ u8 programmed_state;
+#define MSG_CLOCK_HW_STATE_NOT_READY 0
+#define MSG_CLOCK_HW_STATE_READY 1
+ u8 current_state;
+} __packed;
+
+/**
+ * struct ti_sci_msg_req_set_clock_parent - Set the clock parent
+ * @hdr: Generic Header
+ * @dev_id: Device identifier this request is for
+ * @clk_id: Clock identifier for the device for this request.
+ * Each device has it's own set of clock inputs. This indexes
+ * which clock input to modify.
+ * @parent_id: The new clock parent is selectable by an index via this
+ * parameter.
+ *
+ * Request type is TI_SCI_MSG_SET_CLOCK_PARENT, response is generic
+ * ACK / NACK message.
+ */
+struct ti_sci_msg_req_set_clock_parent {
+ struct ti_sci_msg_hdr hdr;
+ u32 dev_id;
+ u8 clk_id;
+ u8 parent_id;
+} __packed;
+
+/**
+ * struct ti_sci_msg_req_get_clock_parent - Get the clock parent
+ * @hdr: Generic Header
+ * @dev_id: Device identifier this request is for
+ * @clk_id: Clock identifier for the device for this request.
+ * Each device has it's own set of clock inputs. This indexes
+ * which clock input to get the parent for.
+ *
+ * Request type is TI_SCI_MSG_GET_CLOCK_PARENT, response is parent information
+ */
+struct ti_sci_msg_req_get_clock_parent {
+ struct ti_sci_msg_hdr hdr;
+ u32 dev_id;
+ u8 clk_id;
+} __packed;
+
+/**
+ * struct ti_sci_msg_resp_get_clock_parent - Response with clock parent
+ * @hdr: Generic Header
+ * @parent_id: The current clock parent
+ *
+ * Response to TI_SCI_MSG_GET_CLOCK_PARENT.
+ */
+struct ti_sci_msg_resp_get_clock_parent {
+ struct ti_sci_msg_hdr hdr;
+ u8 parent_id;
+} __packed;
+
+/**
+ * struct ti_sci_msg_req_get_clock_num_parents - Request to get clock parents
+ * @hdr: Generic header
+ * @dev_id: Device identifier this request is for
+ * @clk_id: Clock identifier for the device for this request.
+ *
+ * This request provides information about how many clock parent options
+ * are available for a given clock to a device. This is typically used
+ * for input clocks.
+ *
+ * Request type is TI_SCI_MSG_GET_NUM_CLOCK_PARENTS, response is appropriate
+ * message, or NACK in case of inability to satisfy request.
+ */
+struct ti_sci_msg_req_get_clock_num_parents {
+ struct ti_sci_msg_hdr hdr;
+ u32 dev_id;
+ u8 clk_id;
+} __packed;
+
+/**
+ * struct ti_sci_msg_resp_get_clock_num_parents - Response for get clk parents
+ * @hdr: Generic header
+ * @num_parents: Number of clock parents
+ *
+ * Response to TI_SCI_MSG_GET_NUM_CLOCK_PARENTS
+ */
+struct ti_sci_msg_resp_get_clock_num_parents {
+ struct ti_sci_msg_hdr hdr;
+ u8 num_parents;
+} __packed;
+
+/**
+ * struct ti_sci_msg_req_query_clock_freq - Request to query a frequency
+ * @hdr: Generic Header
+ * @dev_id: Device identifier this request is for
+ * @min_freq_hz: The minimum allowable frequency in Hz. This is the minimum
+ * allowable programmed frequency and does not account for clock
+ * tolerances and jitter.
+ * @target_freq_hz: The target clock frequency. A frequency will be found
+ * as close to this target frequency as possible.
+ * @max_freq_hz: The maximum allowable frequency in Hz. This is the maximum
+ * allowable programmed frequency and does not account for clock
+ * tolerances and jitter.
+ * @clk_id: Clock identifier for the device for this request.
+ *
+ * NOTE: Normally clock frequency management is automatically done by TISCI
+ * entity. In case of specific requests, TISCI evaluates capability to achieve
+ * requested frequency within provided range and responds with
+ * result message.
+ *
+ * Request type is TI_SCI_MSG_QUERY_CLOCK_FREQ, response is appropriate message,
+ * or NACK in case of inability to satisfy request.
+ */
+struct ti_sci_msg_req_query_clock_freq {
+ struct ti_sci_msg_hdr hdr;
+ u32 dev_id;
+ u64 min_freq_hz;
+ u64 target_freq_hz;
+ u64 max_freq_hz;
+ u8 clk_id;
+} __packed;
+
+/**
+ * struct ti_sci_msg_resp_query_clock_freq - Response to a clock frequency query
+ * @hdr: Generic Header
+ * @freq_hz: Frequency that is the best match in Hz.
+ *
+ * Response to request type TI_SCI_MSG_QUERY_CLOCK_FREQ. NOTE: if the request
+ * cannot be satisfied, the message will be of type NACK.
+ */
+struct ti_sci_msg_resp_query_clock_freq {
+ struct ti_sci_msg_hdr hdr;
+ u64 freq_hz;
+} __packed;
+
+/**
+ * struct ti_sci_msg_req_set_clock_freq - Request to setup a clock frequency
+ * @hdr: Generic Header
+ * @dev_id: Device identifier this request is for
+ * @min_freq_hz: The minimum allowable frequency in Hz. This is the minimum
+ * allowable programmed frequency and does not account for clock
+ * tolerances and jitter.
+ * @target_freq_hz: The target clock frequency. The clock will be programmed
+ * at a rate as close to this target frequency as possible.
+ * @max_freq_hz: The maximum allowable frequency in Hz. This is the maximum
+ * allowable programmed frequency and does not account for clock
+ * tolerances and jitter.
+ * @clk_id: Clock identifier for the device for this request.
+ *
+ * NOTE: Normally clock frequency management is automatically done by TISCI
+ * entity. In case of specific requests, TISCI evaluates capability to achieve
+ * requested range and responds with success/failure message.
+ *
+ * This sets the desired frequency for a clock within an allowable
+ * range. This message will fail on an enabled clock unless
+ * MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE is set for the clock. Additionally,
+ * if other clocks have their frequency modified due to this message,
+ * they also must have the MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE or be disabled.
+ *
+ * Calling set frequency on a clock input to the SoC pseudo-device will
+ * inform the PMMC of that clock's frequency. Setting a frequency of
+ * zero will indicate the clock is disabled.
+ *
+ * Calling set frequency on clock outputs from the SoC pseudo-device will
+ * function similarly to setting the clock frequency on a device.
+ *
+ * Request type is TI_SCI_MSG_SET_CLOCK_FREQ, response is a generic ACK/NACK
+ * message.
+ */
+struct ti_sci_msg_req_set_clock_freq {
+ struct ti_sci_msg_hdr hdr;
+ u32 dev_id;
+ u64 min_freq_hz;
+ u64 target_freq_hz;
+ u64 max_freq_hz;
+ u8 clk_id;
+} __packed;
+
+/**
+ * struct ti_sci_msg_req_get_clock_freq - Request to get the clock frequency
+ * @hdr: Generic Header
+ * @dev_id: Device identifier this request is for
+ * @clk_id: Clock identifier for the device for this request.
+ *
+ * NOTE: Normally clock frequency management is automatically done by TISCI
+ * entity. In some cases, clock frequencies are configured by host.
+ *
+ * Request type is TI_SCI_MSG_GET_CLOCK_FREQ, responded with clock frequency
+ * that the clock is currently at.
+ */
+struct ti_sci_msg_req_get_clock_freq {
+ struct ti_sci_msg_hdr hdr;
+ u32 dev_id;
+ u8 clk_id;
+} __packed;
+
+/**
+ * struct ti_sci_msg_resp_get_clock_freq - Response of clock frequency request
+ * @hdr: Generic Header
+ * @freq_hz: Frequency that the clock is currently on, in Hz.
+ *
+ * Response to request type TI_SCI_MSG_GET_CLOCK_FREQ.
+ */
+struct ti_sci_msg_resp_get_clock_freq {
+ struct ti_sci_msg_hdr hdr;
+ u64 freq_hz;
+} __packed;
+
#endif /* __TI_SCI_H */