ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/firmware/arm_scmi/sensors.c b/marvell/linux/drivers/firmware/arm_scmi/sensors.c
new file mode 100644
index 0000000..931208b
--- /dev/null
+++ b/marvell/linux/drivers/firmware/arm_scmi/sensors.c
@@ -0,0 +1,310 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * System Control and Management Interface (SCMI) Sensor Protocol
+ *
+ * Copyright (C) 2018 ARM Ltd.
+ */
+
+#include "common.h"
+
+enum scmi_sensor_protocol_cmd {
+ SENSOR_DESCRIPTION_GET = 0x3,
+ SENSOR_TRIP_POINT_NOTIFY = 0x4,
+ SENSOR_TRIP_POINT_CONFIG = 0x5,
+ SENSOR_READING_GET = 0x6,
+};
+
+struct scmi_msg_resp_sensor_attributes {
+ __le16 num_sensors;
+ u8 max_requests;
+ u8 reserved;
+ __le32 reg_addr_low;
+ __le32 reg_addr_high;
+ __le32 reg_size;
+};
+
+struct scmi_msg_resp_sensor_description {
+ __le16 num_returned;
+ __le16 num_remaining;
+ struct {
+ __le32 id;
+ __le32 attributes_low;
+#define SUPPORTS_ASYNC_READ(x) ((x) & BIT(31))
+#define NUM_TRIP_POINTS(x) ((x) & 0xff)
+ __le32 attributes_high;
+#define SENSOR_TYPE(x) ((x) & 0xff)
+#define SENSOR_SCALE(x) (((x) >> 11) & 0x1f)
+#define SENSOR_SCALE_SIGN BIT(4)
+#define SENSOR_SCALE_EXTEND GENMASK(7, 5)
+#define SENSOR_UPDATE_SCALE(x) (((x) >> 22) & 0x1f)
+#define SENSOR_UPDATE_BASE(x) (((x) >> 27) & 0x1f)
+ u8 name[SCMI_MAX_STR_SIZE];
+ } desc[0];
+};
+
+struct scmi_msg_sensor_trip_point_notify {
+ __le32 id;
+ __le32 event_control;
+#define SENSOR_TP_NOTIFY_ALL BIT(0)
+};
+
+struct scmi_msg_set_sensor_trip_point {
+ __le32 id;
+ __le32 event_control;
+#define SENSOR_TP_EVENT_MASK (0x3)
+#define SENSOR_TP_DISABLED 0x0
+#define SENSOR_TP_POSITIVE 0x1
+#define SENSOR_TP_NEGATIVE 0x2
+#define SENSOR_TP_BOTH 0x3
+#define SENSOR_TP_ID(x) (((x) & 0xff) << 4)
+ __le32 value_low;
+ __le32 value_high;
+};
+
+struct scmi_msg_sensor_reading_get {
+ __le32 id;
+ __le32 flags;
+#define SENSOR_READ_ASYNC BIT(0)
+};
+
+struct sensors_info {
+ int num_sensors;
+ int max_requests;
+ u64 reg_addr;
+ u32 reg_size;
+ struct scmi_sensor_info *sensors;
+};
+
+static int scmi_sensor_attributes_get(const struct scmi_handle *handle,
+ struct sensors_info *si)
+{
+ int ret;
+ struct scmi_xfer *t;
+ struct scmi_msg_resp_sensor_attributes *attr;
+
+ ret = scmi_xfer_get_init(handle, PROTOCOL_ATTRIBUTES,
+ SCMI_PROTOCOL_SENSOR, 0, sizeof(*attr), &t);
+ if (ret)
+ return ret;
+
+ attr = t->rx.buf;
+
+ ret = scmi_do_xfer(handle, t);
+ if (!ret) {
+ si->num_sensors = le16_to_cpu(attr->num_sensors);
+ si->max_requests = attr->max_requests;
+ si->reg_addr = le32_to_cpu(attr->reg_addr_low) |
+ (u64)le32_to_cpu(attr->reg_addr_high) << 32;
+ si->reg_size = le32_to_cpu(attr->reg_size);
+ }
+
+ scmi_xfer_put(handle, t);
+ return ret;
+}
+
+static int scmi_sensor_description_get(const struct scmi_handle *handle,
+ struct sensors_info *si)
+{
+ int ret, cnt;
+ u32 desc_index = 0;
+ u16 num_returned, num_remaining;
+ struct scmi_xfer *t;
+ struct scmi_msg_resp_sensor_description *buf;
+
+ ret = scmi_xfer_get_init(handle, SENSOR_DESCRIPTION_GET,
+ SCMI_PROTOCOL_SENSOR, sizeof(__le32), 0, &t);
+ if (ret)
+ return ret;
+
+ buf = t->rx.buf;
+
+ do {
+ /* Set the number of sensors to be skipped/already read */
+ put_unaligned_le32(desc_index, t->tx.buf);
+
+ ret = scmi_do_xfer(handle, t);
+ if (ret)
+ break;
+
+ num_returned = le16_to_cpu(buf->num_returned);
+ num_remaining = le16_to_cpu(buf->num_remaining);
+
+ if (desc_index + num_returned > si->num_sensors) {
+ dev_err(handle->dev, "No. of sensors can't exceed %d",
+ si->num_sensors);
+ break;
+ }
+
+ for (cnt = 0; cnt < num_returned; cnt++) {
+ u32 attrh, attrl;
+ struct scmi_sensor_info *s;
+
+ attrl = le32_to_cpu(buf->desc[cnt].attributes_low);
+ attrh = le32_to_cpu(buf->desc[cnt].attributes_high);
+ s = &si->sensors[desc_index + cnt];
+ s->id = le32_to_cpu(buf->desc[cnt].id);
+ s->type = SENSOR_TYPE(attrh);
+ s->scale = SENSOR_SCALE(attrh);
+ /* Sign extend to a full s8 */
+ if (s->scale & SENSOR_SCALE_SIGN)
+ s->scale |= SENSOR_SCALE_EXTEND;
+ s->async = SUPPORTS_ASYNC_READ(attrl);
+ s->num_trip_points = NUM_TRIP_POINTS(attrl);
+ strlcpy(s->name, buf->desc[cnt].name, SCMI_MAX_STR_SIZE);
+ }
+
+ desc_index += num_returned;
+
+ scmi_reset_rx_to_maxsz(handle, t);
+ /*
+ * check for both returned and remaining to avoid infinite
+ * loop due to buggy firmware
+ */
+ } while (num_returned && num_remaining);
+
+ scmi_xfer_put(handle, t);
+ return ret;
+}
+
+static int scmi_sensor_trip_point_notify(const struct scmi_handle *handle,
+ u32 sensor_id, bool enable)
+{
+ int ret;
+ u32 evt_cntl = enable ? SENSOR_TP_NOTIFY_ALL : 0;
+ struct scmi_xfer *t;
+ struct scmi_msg_sensor_trip_point_notify *cfg;
+
+ ret = scmi_xfer_get_init(handle, SENSOR_TRIP_POINT_NOTIFY,
+ SCMI_PROTOCOL_SENSOR, sizeof(*cfg), 0, &t);
+ if (ret)
+ return ret;
+
+ cfg = t->tx.buf;
+ cfg->id = cpu_to_le32(sensor_id);
+ cfg->event_control = cpu_to_le32(evt_cntl);
+
+ ret = scmi_do_xfer(handle, t);
+
+ scmi_xfer_put(handle, t);
+ return ret;
+}
+
+static int
+scmi_sensor_trip_point_config(const struct scmi_handle *handle, u32 sensor_id,
+ u8 trip_id, u64 trip_value)
+{
+ int ret;
+ u32 evt_cntl = SENSOR_TP_BOTH;
+ struct scmi_xfer *t;
+ struct scmi_msg_set_sensor_trip_point *trip;
+
+ ret = scmi_xfer_get_init(handle, SENSOR_TRIP_POINT_CONFIG,
+ SCMI_PROTOCOL_SENSOR, sizeof(*trip), 0, &t);
+ if (ret)
+ return ret;
+
+ trip = t->tx.buf;
+ trip->id = cpu_to_le32(sensor_id);
+ trip->event_control = cpu_to_le32(evt_cntl | SENSOR_TP_ID(trip_id));
+ trip->value_low = cpu_to_le32(trip_value & 0xffffffff);
+ trip->value_high = cpu_to_le32(trip_value >> 32);
+
+ ret = scmi_do_xfer(handle, t);
+
+ scmi_xfer_put(handle, t);
+ return ret;
+}
+
+static int scmi_sensor_reading_get(const struct scmi_handle *handle,
+ u32 sensor_id, u64 *value)
+{
+ int ret;
+ struct scmi_xfer *t;
+ struct scmi_msg_sensor_reading_get *sensor;
+ struct sensors_info *si = handle->sensor_priv;
+ struct scmi_sensor_info *s = si->sensors + sensor_id;
+
+ ret = scmi_xfer_get_init(handle, SENSOR_READING_GET,
+ SCMI_PROTOCOL_SENSOR, sizeof(*sensor),
+ sizeof(u64), &t);
+ if (ret)
+ return ret;
+
+ sensor = t->tx.buf;
+ sensor->id = cpu_to_le32(sensor_id);
+
+ if (s->async) {
+ sensor->flags = cpu_to_le32(SENSOR_READ_ASYNC);
+ ret = scmi_do_xfer_with_response(handle, t);
+ if (!ret)
+ *value = get_unaligned_le64((void *)
+ ((__le32 *)t->rx.buf + 1));
+ } else {
+ sensor->flags = cpu_to_le32(0);
+ ret = scmi_do_xfer(handle, t);
+ if (!ret)
+ *value = get_unaligned_le64(t->rx.buf);
+ }
+
+ scmi_xfer_put(handle, t);
+ return ret;
+}
+
+static const struct scmi_sensor_info *
+scmi_sensor_info_get(const struct scmi_handle *handle, u32 sensor_id)
+{
+ struct sensors_info *si = handle->sensor_priv;
+
+ return si->sensors + sensor_id;
+}
+
+static int scmi_sensor_count_get(const struct scmi_handle *handle)
+{
+ struct sensors_info *si = handle->sensor_priv;
+
+ return si->num_sensors;
+}
+
+static struct scmi_sensor_ops sensor_ops = {
+ .count_get = scmi_sensor_count_get,
+ .info_get = scmi_sensor_info_get,
+ .trip_point_notify = scmi_sensor_trip_point_notify,
+ .trip_point_config = scmi_sensor_trip_point_config,
+ .reading_get = scmi_sensor_reading_get,
+};
+
+static int scmi_sensors_protocol_init(struct scmi_handle *handle)
+{
+ u32 version;
+ struct sensors_info *sinfo;
+
+ scmi_version_get(handle, SCMI_PROTOCOL_SENSOR, &version);
+
+ dev_dbg(handle->dev, "Sensor Version %d.%d\n",
+ PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version));
+
+ sinfo = devm_kzalloc(handle->dev, sizeof(*sinfo), GFP_KERNEL);
+ if (!sinfo)
+ return -ENOMEM;
+
+ scmi_sensor_attributes_get(handle, sinfo);
+
+ sinfo->sensors = devm_kcalloc(handle->dev, sinfo->num_sensors,
+ sizeof(*sinfo->sensors), GFP_KERNEL);
+ if (!sinfo->sensors)
+ return -ENOMEM;
+
+ scmi_sensor_description_get(handle, sinfo);
+
+ handle->sensor_ops = &sensor_ops;
+ handle->sensor_priv = sinfo;
+
+ return 0;
+}
+
+static int __init scmi_sensors_init(void)
+{
+ return scmi_protocol_register(SCMI_PROTOCOL_SENSOR,
+ &scmi_sensors_protocol_init);
+}
+subsys_initcall(scmi_sensors_init);