summaryrefslogtreecommitdiffstats
path: root/drivers/firmware
diff options
context:
space:
mode:
authorArnd Bergmann <arnd@arndb.de>2024-11-12 16:01:09 +0100
committerArnd Bergmann <arnd@arndb.de>2024-11-12 16:01:10 +0100
commitffca677936ea87c0a5204b39761227da85403774 (patch)
tree129c025499839a55687b0232600d4b401cb0059d /drivers/firmware
parentMerge tag 'reset-for-v6.13' of git://git.pengutronix.de/pza/linux into soc/dr... (diff)
parentfirmware: ti_sci: Remove use of of_match_ptr() helper (diff)
downloadlinux-ffca677936ea87c0a5204b39761227da85403774.tar.xz
linux-ffca677936ea87c0a5204b39761227da85403774.zip
Merge tag 'ti-driver-soc-for-v6.13' of https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux into soc/drivers
TI SoC driver updates for v6.13 - knav_qmss_queue: Cleanups around request_irq params and redundant code. - ti_sci: Power management ops in preperation for suspend/resume capability. Also includes dependency patch to export dev_pm_qos_read_value (acked by Rafael). * tag 'ti-driver-soc-for-v6.13' of https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux: firmware: ti_sci: Remove use of of_match_ptr() helper firmware: ti_sci: add CPU latency constraint management firmware: ti_sci: Introduce Power Management Ops firmware: ti_sci: Add system suspend and resume call firmware: ti_sci: Add support for querying the firmware caps PM: QoS: Export dev_pm_qos_read_value soc: ti: knav_qmss_queue: Drop redundant continue statement soc: ti: knav_qmss_queue: Use IRQF_NO_AUTOEN flag in request_irq() Link: https://lore.kernel.org/r/20241106121708.rso5wvc7wbhfi6xk@maverick Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/ti_sci.c489
-rw-r--r--drivers/firmware/ti_sci.h143
2 files changed, 629 insertions, 3 deletions
diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index 160968301b1f..806a975fff22 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -2,13 +2,14 @@
/*
* Texas Instruments System Control Interface Protocol Driver
*
- * Copyright (C) 2015-2022 Texas Instruments Incorporated - https://www.ti.com/
+ * Copyright (C) 2015-2024 Texas Instruments Incorporated - https://www.ti.com/
* Nishanth Menon
*/
#define pr_fmt(fmt) "%s: " fmt, __func__
#include <linux/bitmap.h>
+#include <linux/cpu.h>
#include <linux/debugfs.h>
#include <linux/export.h>
#include <linux/io.h>
@@ -19,11 +20,14 @@
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
+#include <linux/pm_qos.h>
#include <linux/property.h>
#include <linux/semaphore.h>
#include <linux/slab.h>
#include <linux/soc/ti/ti-msgmgr.h>
#include <linux/soc/ti/ti_sci_protocol.h>
+#include <linux/suspend.h>
+#include <linux/sys_soc.h>
#include <linux/reboot.h>
#include "ti_sci.h"
@@ -98,6 +102,7 @@ struct ti_sci_desc {
* @minfo: Message info
* @node: list head
* @host_id: Host ID
+ * @fw_caps: FW/SoC low power capabilities
* @users: Number of users of this instance
*/
struct ti_sci_info {
@@ -114,6 +119,7 @@ struct ti_sci_info {
struct ti_sci_xfers_info minfo;
struct list_head node;
u8 host_id;
+ u64 fw_caps;
/* protected by ti_sci_list_mutex */
int users;
};
@@ -1651,6 +1657,364 @@ fail:
return ret;
}
+/**
+ * ti_sci_cmd_prepare_sleep() - Prepare system for system suspend
+ * @handle: pointer to TI SCI handle
+ * @mode: Device identifier
+ * @ctx_lo: Low part of address for context save
+ * @ctx_hi: High part of address for context save
+ * @debug_flags: Debug flags to pass to firmware
+ *
+ * Return: 0 if all went well, else returns appropriate error value.
+ */
+static int ti_sci_cmd_prepare_sleep(const struct ti_sci_handle *handle, u8 mode,
+ u32 ctx_lo, u32 ctx_hi, u32 debug_flags)
+{
+ struct ti_sci_info *info;
+ struct ti_sci_msg_req_prepare_sleep *req;
+ struct ti_sci_msg_hdr *resp;
+ struct ti_sci_xfer *xfer;
+ struct device *dev;
+ int ret = 0;
+
+ if (IS_ERR(handle))
+ return PTR_ERR(handle);
+ if (!handle)
+ return -EINVAL;
+
+ info = handle_to_ti_sci_info(handle);
+ dev = info->dev;
+
+ xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_PREPARE_SLEEP,
+ TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
+ sizeof(*req), sizeof(*resp));
+ if (IS_ERR(xfer)) {
+ ret = PTR_ERR(xfer);
+ dev_err(dev, "Message alloc failed(%d)\n", ret);
+ return ret;
+ }
+
+ req = (struct ti_sci_msg_req_prepare_sleep *)xfer->xfer_buf;
+ req->mode = mode;
+ req->ctx_lo = ctx_lo;
+ req->ctx_hi = ctx_hi;
+ req->debug_flags = debug_flags;
+
+ ret = ti_sci_do_xfer(info, xfer);
+ if (ret) {
+ dev_err(dev, "Mbox send fail %d\n", ret);
+ goto fail;
+ }
+
+ resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf;
+
+ if (!ti_sci_is_response_ack(resp)) {
+ dev_err(dev, "Failed to prepare sleep\n");
+ ret = -ENODEV;
+ }
+
+fail:
+ ti_sci_put_one_xfer(&info->minfo, xfer);
+
+ return ret;
+}
+
+/**
+ * ti_sci_msg_cmd_query_fw_caps() - Get the FW/SoC capabilities
+ * @handle: Pointer to TI SCI handle
+ * @fw_caps: Each bit in fw_caps indicating one FW/SOC capability
+ *
+ * Check if the firmware supports any optional low power modes.
+ * Old revisions of TIFS (< 08.04) will NACK the request which results in
+ * -ENODEV being returned.
+ *
+ * Return: 0 if all went well, else returns appropriate error value.
+ */
+static int ti_sci_msg_cmd_query_fw_caps(const struct ti_sci_handle *handle,
+ u64 *fw_caps)
+{
+ struct ti_sci_info *info;
+ struct ti_sci_xfer *xfer;
+ struct ti_sci_msg_resp_query_fw_caps *resp;
+ struct device *dev;
+ int ret = 0;
+
+ if (IS_ERR(handle))
+ return PTR_ERR(handle);
+ if (!handle)
+ return -EINVAL;
+
+ info = handle_to_ti_sci_info(handle);
+ dev = info->dev;
+
+ xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_QUERY_FW_CAPS,
+ TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
+ sizeof(struct ti_sci_msg_hdr),
+ sizeof(*resp));
+ if (IS_ERR(xfer)) {
+ ret = PTR_ERR(xfer);
+ dev_err(dev, "Message alloc failed(%d)\n", ret);
+ return ret;
+ }
+
+ ret = ti_sci_do_xfer(info, xfer);
+ if (ret) {
+ dev_err(dev, "Mbox send fail %d\n", ret);
+ goto fail;
+ }
+
+ resp = (struct ti_sci_msg_resp_query_fw_caps *)xfer->xfer_buf;
+
+ if (!ti_sci_is_response_ack(resp)) {
+ dev_err(dev, "Failed to get capabilities\n");
+ ret = -ENODEV;
+ goto fail;
+ }
+
+ if (fw_caps)
+ *fw_caps = resp->fw_caps;
+
+fail:
+ ti_sci_put_one_xfer(&info->minfo, xfer);
+
+ return ret;
+}
+
+/**
+ * ti_sci_cmd_set_io_isolation() - Enable IO isolation in LPM
+ * @handle: Pointer to TI SCI handle
+ * @state: The desired state of the IO isolation
+ *
+ * Return: 0 if all went well, else returns appropriate error value.
+ */
+static int ti_sci_cmd_set_io_isolation(const struct ti_sci_handle *handle,
+ u8 state)
+{
+ struct ti_sci_info *info;
+ struct ti_sci_msg_req_set_io_isolation *req;
+ struct ti_sci_msg_hdr *resp;
+ struct ti_sci_xfer *xfer;
+ struct device *dev;
+ int ret = 0;
+
+ if (IS_ERR(handle))
+ return PTR_ERR(handle);
+ if (!handle)
+ return -EINVAL;
+
+ info = handle_to_ti_sci_info(handle);
+ dev = info->dev;
+
+ xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_IO_ISOLATION,
+ TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
+ sizeof(*req), sizeof(*resp));
+ if (IS_ERR(xfer)) {
+ ret = PTR_ERR(xfer);
+ dev_err(dev, "Message alloc failed(%d)\n", ret);
+ return ret;
+ }
+ req = (struct ti_sci_msg_req_set_io_isolation *)xfer->xfer_buf;
+ req->state = state;
+
+ ret = ti_sci_do_xfer(info, xfer);
+ if (ret) {
+ dev_err(dev, "Mbox send fail %d\n", ret);
+ goto fail;
+ }
+
+ resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf;
+
+ if (!ti_sci_is_response_ack(resp)) {
+ dev_err(dev, "Failed to set IO isolation\n");
+ ret = -ENODEV;
+ }
+
+fail:
+ ti_sci_put_one_xfer(&info->minfo, xfer);
+
+ return ret;
+}
+
+/**
+ * ti_sci_msg_cmd_lpm_wake_reason() - Get the wakeup source from LPM
+ * @handle: Pointer to TI SCI handle
+ * @source: The wakeup source that woke the SoC from LPM
+ * @timestamp: Timestamp of the wakeup event
+ * @pin: The pin that has triggered wake up
+ * @mode: The last entered low power mode
+ *
+ * Return: 0 if all went well, else returns appropriate error value.
+ */
+static int ti_sci_msg_cmd_lpm_wake_reason(const struct ti_sci_handle *handle,
+ u32 *source, u64 *timestamp, u8 *pin, u8 *mode)
+{
+ struct ti_sci_info *info;
+ struct ti_sci_xfer *xfer;
+ struct ti_sci_msg_resp_lpm_wake_reason *resp;
+ struct device *dev;
+ int ret = 0;
+
+ if (IS_ERR(handle))
+ return PTR_ERR(handle);
+ if (!handle)
+ return -EINVAL;
+
+ info = handle_to_ti_sci_info(handle);
+ dev = info->dev;
+
+ xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_LPM_WAKE_REASON,
+ TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
+ sizeof(struct ti_sci_msg_hdr),
+ sizeof(*resp));
+ if (IS_ERR(xfer)) {
+ ret = PTR_ERR(xfer);
+ dev_err(dev, "Message alloc failed(%d)\n", ret);
+ return ret;
+ }
+
+ ret = ti_sci_do_xfer(info, xfer);
+ if (ret) {
+ dev_err(dev, "Mbox send fail %d\n", ret);
+ goto fail;
+ }
+
+ resp = (struct ti_sci_msg_resp_lpm_wake_reason *)xfer->xfer_buf;
+
+ if (!ti_sci_is_response_ack(resp)) {
+ dev_err(dev, "Failed to get wake reason\n");
+ ret = -ENODEV;
+ goto fail;
+ }
+
+ if (source)
+ *source = resp->wake_source;
+ if (timestamp)
+ *timestamp = resp->wake_timestamp;
+ if (pin)
+ *pin = resp->wake_pin;
+ if (mode)
+ *mode = resp->mode;
+
+fail:
+ ti_sci_put_one_xfer(&info->minfo, xfer);
+
+ return ret;
+}
+
+/**
+ * ti_sci_cmd_set_device_constraint() - Set LPM constraint on behalf of a device
+ * @handle: pointer to TI SCI handle
+ * @id: Device identifier
+ * @state: The desired state of device constraint: set or clear
+ *
+ * Return: 0 if all went well, else returns appropriate error value.
+ */
+static int ti_sci_cmd_set_device_constraint(const struct ti_sci_handle *handle,
+ u32 id, u8 state)
+{
+ struct ti_sci_info *info;
+ struct ti_sci_msg_req_lpm_set_device_constraint *req;
+ struct ti_sci_msg_hdr *resp;
+ struct ti_sci_xfer *xfer;
+ struct device *dev;
+ int ret = 0;
+
+ if (IS_ERR(handle))
+ return PTR_ERR(handle);
+ if (!handle)
+ return -EINVAL;
+
+ info = handle_to_ti_sci_info(handle);
+ dev = info->dev;
+
+ xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_LPM_SET_DEVICE_CONSTRAINT,
+ TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
+ sizeof(*req), sizeof(*resp));
+ if (IS_ERR(xfer)) {
+ ret = PTR_ERR(xfer);
+ dev_err(dev, "Message alloc failed(%d)\n", ret);
+ return ret;
+ }
+ req = (struct ti_sci_msg_req_lpm_set_device_constraint *)xfer->xfer_buf;
+ req->id = id;
+ req->state = state;
+
+ ret = ti_sci_do_xfer(info, xfer);
+ if (ret) {
+ dev_err(dev, "Mbox send fail %d\n", ret);
+ goto fail;
+ }
+
+ resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf;
+
+ if (!ti_sci_is_response_ack(resp)) {
+ dev_err(dev, "Failed to set device constraint\n");
+ ret = -ENODEV;
+ }
+
+fail:
+ ti_sci_put_one_xfer(&info->minfo, xfer);
+
+ return ret;
+}
+
+/**
+ * ti_sci_cmd_set_latency_constraint() - Set LPM resume latency constraint
+ * @handle: pointer to TI SCI handle
+ * @latency: maximum acceptable latency (in ms) to wake up from LPM
+ * @state: The desired state of latency constraint: set or clear
+ *
+ * Return: 0 if all went well, else returns appropriate error value.
+ */
+static int ti_sci_cmd_set_latency_constraint(const struct ti_sci_handle *handle,
+ u16 latency, u8 state)
+{
+ struct ti_sci_info *info;
+ struct ti_sci_msg_req_lpm_set_latency_constraint *req;
+ struct ti_sci_msg_hdr *resp;
+ struct ti_sci_xfer *xfer;
+ struct device *dev;
+ int ret = 0;
+
+ if (IS_ERR(handle))
+ return PTR_ERR(handle);
+ if (!handle)
+ return -EINVAL;
+
+ info = handle_to_ti_sci_info(handle);
+ dev = info->dev;
+
+ xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_LPM_SET_LATENCY_CONSTRAINT,
+ TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
+ sizeof(*req), sizeof(*resp));
+ if (IS_ERR(xfer)) {
+ ret = PTR_ERR(xfer);
+ dev_err(dev, "Message alloc failed(%d)\n", ret);
+ return ret;
+ }
+ req = (struct ti_sci_msg_req_lpm_set_latency_constraint *)xfer->xfer_buf;
+ req->latency = latency;
+ req->state = state;
+
+ ret = ti_sci_do_xfer(info, xfer);
+ if (ret) {
+ dev_err(dev, "Mbox send fail %d\n", ret);
+ goto fail;
+ }
+
+ resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf;
+
+ if (!ti_sci_is_response_ack(resp)) {
+ dev_err(dev, "Failed to set device constraint\n");
+ ret = -ENODEV;
+ }
+
+fail:
+ ti_sci_put_one_xfer(&info->minfo, xfer);
+
+ return ret;
+}
+
static int ti_sci_cmd_core_reboot(const struct ti_sci_handle *handle)
{
struct ti_sci_info *info;
@@ -2793,6 +3157,7 @@ static void ti_sci_setup_ops(struct ti_sci_info *info)
struct ti_sci_core_ops *core_ops = &ops->core_ops;
struct ti_sci_dev_ops *dops = &ops->dev_ops;
struct ti_sci_clk_ops *cops = &ops->clk_ops;
+ struct ti_sci_pm_ops *pmops = &ops->pm_ops;
struct ti_sci_rm_core_ops *rm_core_ops = &ops->rm_core_ops;
struct ti_sci_rm_irq_ops *iops = &ops->rm_irq_ops;
struct ti_sci_rm_ringacc_ops *rops = &ops->rm_ring_ops;
@@ -2832,6 +3197,13 @@ static void ti_sci_setup_ops(struct ti_sci_info *info)
cops->set_freq = ti_sci_cmd_clk_set_freq;
cops->get_freq = ti_sci_cmd_clk_get_freq;
+ if (info->fw_caps & MSG_FLAG_CAPS_LPM_DM_MANAGED) {
+ pr_debug("detected DM managed LPM in fw_caps\n");
+ pmops->lpm_wake_reason = ti_sci_msg_cmd_lpm_wake_reason;
+ pmops->set_device_constraint = ti_sci_cmd_set_device_constraint;
+ pmops->set_latency_constraint = ti_sci_cmd_set_latency_constraint;
+ }
+
rm_core_ops->get_range = ti_sci_cmd_get_resource_range;
rm_core_ops->get_range_from_shost =
ti_sci_cmd_get_resource_range_from_shost;
@@ -3262,6 +3634,111 @@ static int tisci_reboot_handler(struct sys_off_data *data)
return NOTIFY_BAD;
}
+static int ti_sci_prepare_system_suspend(struct ti_sci_info *info)
+{
+ /*
+ * Map and validate the target Linux suspend state to TISCI LPM.
+ * Default is to let Device Manager select the low power mode.
+ */
+ switch (pm_suspend_target_state) {
+ case PM_SUSPEND_MEM:
+ if (info->fw_caps & MSG_FLAG_CAPS_LPM_DM_MANAGED) {
+ /*
+ * For the DM_MANAGED mode the context is reserved for
+ * internal use and can be 0
+ */
+ return ti_sci_cmd_prepare_sleep(&info->handle,
+ TISCI_MSG_VALUE_SLEEP_MODE_DM_MANAGED,
+ 0, 0, 0);
+ } else {
+ /* DM Managed is not supported by the firmware. */
+ dev_err(info->dev, "Suspend to memory is not supported by the firmware\n");
+ return -EOPNOTSUPP;
+ }
+ break;
+ default:
+ /*
+ * Do not fail if we don't have action to take for a
+ * specific suspend mode.
+ */
+ return 0;
+ }
+}
+
+static int __maybe_unused ti_sci_suspend(struct device *dev)
+{
+ struct ti_sci_info *info = dev_get_drvdata(dev);
+ struct device *cpu_dev, *cpu_dev_max = NULL;
+ s32 val, cpu_lat = 0;
+ int i, ret;
+
+ if (info->fw_caps & MSG_FLAG_CAPS_LPM_DM_MANAGED) {
+ for_each_possible_cpu(i) {
+ cpu_dev = get_cpu_device(i);
+ val = dev_pm_qos_read_value(cpu_dev, DEV_PM_QOS_RESUME_LATENCY);
+ if (val != PM_QOS_RESUME_LATENCY_NO_CONSTRAINT) {
+ cpu_lat = max(cpu_lat, val);
+ cpu_dev_max = cpu_dev;
+ }
+ }
+ if (cpu_dev_max) {
+ dev_dbg(cpu_dev_max, "%s: sending max CPU latency=%u\n", __func__, cpu_lat);
+ ret = ti_sci_cmd_set_latency_constraint(&info->handle,
+ cpu_lat, TISCI_MSG_CONSTRAINT_SET);
+ if (ret)
+ return ret;
+ }
+ }
+
+ ret = ti_sci_prepare_system_suspend(info);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int __maybe_unused ti_sci_suspend_noirq(struct device *dev)
+{
+ struct ti_sci_info *info = dev_get_drvdata(dev);
+ int ret = 0;
+
+ ret = ti_sci_cmd_set_io_isolation(&info->handle, TISCI_MSG_VALUE_IO_ENABLE);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int __maybe_unused ti_sci_resume_noirq(struct device *dev)
+{
+ struct ti_sci_info *info = dev_get_drvdata(dev);
+ int ret = 0;
+ u32 source;
+ u64 time;
+ u8 pin;
+ u8 mode;
+
+ ret = ti_sci_cmd_set_io_isolation(&info->handle, TISCI_MSG_VALUE_IO_DISABLE);
+ if (ret)
+ return ret;
+
+ ret = ti_sci_msg_cmd_lpm_wake_reason(&info->handle, &source, &time, &pin, &mode);
+ /* Do not fail to resume on error as the wake reason is not critical */
+ if (!ret)
+ dev_info(dev, "ti_sci: wakeup source:0x%x, pin:0x%x, mode:0x%x\n",
+ source, pin, mode);
+
+ return 0;
+}
+
+static const struct dev_pm_ops ti_sci_pm_ops = {
+#ifdef CONFIG_PM_SLEEP
+ .suspend = ti_sci_suspend,
+ .suspend_noirq = ti_sci_suspend_noirq,
+ .resume_noirq = ti_sci_resume_noirq,
+#endif
+};
+
/* Description for K2G */
static const struct ti_sci_desc ti_sci_pmmc_k2g_desc = {
.default_host_id = 2,
@@ -3390,6 +3867,13 @@ static int ti_sci_probe(struct platform_device *pdev)
goto out;
}
+ ti_sci_msg_cmd_query_fw_caps(&info->handle, &info->fw_caps);
+ dev_dbg(dev, "Detected firmware capabilities: %s%s%s\n",
+ info->fw_caps & MSG_FLAG_CAPS_GENERIC ? "Generic" : "",
+ info->fw_caps & MSG_FLAG_CAPS_LPM_PARTIAL_IO ? " Partial-IO" : "",
+ info->fw_caps & MSG_FLAG_CAPS_LPM_DM_MANAGED ? " DM-Managed" : ""
+ );
+
ti_sci_setup_ops(info);
ret = devm_register_restart_handler(dev, tisci_reboot_handler, info);
@@ -3421,8 +3905,9 @@ static struct platform_driver ti_sci_driver = {
.probe = ti_sci_probe,
.driver = {
.name = "ti-sci",
- .of_match_table = of_match_ptr(ti_sci_of_match),
+ .of_match_table = ti_sci_of_match,
.suppress_bind_attrs = true,
+ .pm = &ti_sci_pm_ops,
},
};
module_platform_driver(ti_sci_driver);
diff --git a/drivers/firmware/ti_sci.h b/drivers/firmware/ti_sci.h
index 5846c60220f5..053387d7baa0 100644
--- a/drivers/firmware/ti_sci.h
+++ b/drivers/firmware/ti_sci.h
@@ -6,7 +6,7 @@
* The system works in a message response protocol
* See: https://software-dl.ti.com/tisci/esd/latest/index.html for details
*
- * Copyright (C) 2015-2016 Texas Instruments Incorporated - https://www.ti.com/
+ * Copyright (C) 2015-2024 Texas Instruments Incorporated - https://www.ti.com/
*/
#ifndef __TI_SCI_H
@@ -19,6 +19,7 @@
#define TI_SCI_MSG_WAKE_REASON 0x0003
#define TI_SCI_MSG_GOODBYE 0x0004
#define TI_SCI_MSG_SYS_RESET 0x0005
+#define TI_SCI_MSG_QUERY_FW_CAPS 0x0022
/* Device requests */
#define TI_SCI_MSG_SET_DEVICE_STATE 0x0200
@@ -35,6 +36,13 @@
#define TI_SCI_MSG_QUERY_CLOCK_FREQ 0x010d
#define TI_SCI_MSG_GET_CLOCK_FREQ 0x010e
+/* Low Power Mode Requests */
+#define TI_SCI_MSG_PREPARE_SLEEP 0x0300
+#define TI_SCI_MSG_LPM_WAKE_REASON 0x0306
+#define TI_SCI_MSG_SET_IO_ISOLATION 0x0307
+#define TI_SCI_MSG_LPM_SET_DEVICE_CONSTRAINT 0x0309
+#define TI_SCI_MSG_LPM_SET_LATENCY_CONSTRAINT 0x030A
+
/* Resource Management Requests */
#define TI_SCI_MSG_GET_RESOURCE_RANGE 0x1500
@@ -133,6 +141,27 @@ struct ti_sci_msg_req_reboot {
} __packed;
/**
+ * struct ti_sci_msg_resp_query_fw_caps - Response for query firmware caps
+ * @hdr: Generic header
+ * @fw_caps: Each bit in fw_caps indicating one FW/SOC capability
+ * MSG_FLAG_CAPS_GENERIC: Generic capability (LPM not supported)
+ * MSG_FLAG_CAPS_LPM_PARTIAL_IO: Partial IO in LPM
+ * MSG_FLAG_CAPS_LPM_DM_MANAGED: LPM can be managed by DM
+ *
+ * Response to a generic message with message type TI_SCI_MSG_QUERY_FW_CAPS
+ * providing currently available SOC/firmware capabilities. SoC that don't
+ * support low power modes return only MSG_FLAG_CAPS_GENERIC capability.
+ */
+struct ti_sci_msg_resp_query_fw_caps {
+ struct ti_sci_msg_hdr hdr;
+#define MSG_FLAG_CAPS_GENERIC TI_SCI_MSG_FLAG(0)
+#define MSG_FLAG_CAPS_LPM_PARTIAL_IO TI_SCI_MSG_FLAG(4)
+#define MSG_FLAG_CAPS_LPM_DM_MANAGED TI_SCI_MSG_FLAG(5)
+#define MSG_MASK_CAPS_LPM GENMASK_ULL(4, 1)
+ u64 fw_caps;
+} __packed;
+
+/**
* struct ti_sci_msg_req_set_device_state - Set the desired state of the device
* @hdr: Generic header
* @id: Indicates which device to modify
@@ -545,6 +574,118 @@ struct ti_sci_msg_resp_get_clock_freq {
u64 freq_hz;
} __packed;
+/**
+ * struct tisci_msg_req_prepare_sleep - Request for TISCI_MSG_PREPARE_SLEEP.
+ *
+ * @hdr TISCI header to provide ACK/NAK flags to the host.
+ * @mode Low power mode to enter.
+ * @ctx_lo Low 32-bits of physical pointer to address to use for context save.
+ * @ctx_hi High 32-bits of physical pointer to address to use for context save.
+ * @debug_flags Flags that can be set to halt the sequence during suspend or
+ * resume to allow JTAG connection and debug.
+ *
+ * This message is used as the first step of entering a low power mode. It
+ * allows configurable information, including which state to enter to be
+ * easily shared from the application, as this is a non-secure message and
+ * therefore can be sent by anyone.
+ */
+struct ti_sci_msg_req_prepare_sleep {
+ struct ti_sci_msg_hdr hdr;
+
+#define TISCI_MSG_VALUE_SLEEP_MODE_DM_MANAGED 0xfd
+ u8 mode;
+ u32 ctx_lo;
+ u32 ctx_hi;
+ u32 debug_flags;
+} __packed;
+
+/**
+ * struct tisci_msg_set_io_isolation_req - Request for TI_SCI_MSG_SET_IO_ISOLATION.
+ *
+ * @hdr: Generic header
+ * @state: The deseared state of the IO isolation.
+ *
+ * This message is used to enable/disable IO isolation for low power modes.
+ * Response is generic ACK / NACK message.
+ */
+struct ti_sci_msg_req_set_io_isolation {
+ struct ti_sci_msg_hdr hdr;
+ u8 state;
+} __packed;
+
+/**
+ * struct ti_sci_msg_resp_lpm_wake_reason - Response for TI_SCI_MSG_LPM_WAKE_REASON.
+ *
+ * @hdr: Generic header.
+ * @wake_source: The wake up source that woke soc from LPM.
+ * @wake_timestamp: Timestamp at which soc woke.
+ * @wake_pin: The pin that has triggered wake up.
+ * @mode: The last entered low power mode.
+ * @rsvd: Reserved for future use.
+ *
+ * Response to a generic message with message type TI_SCI_MSG_LPM_WAKE_REASON,
+ * used to query the wake up source, pin and entered low power mode.
+ */
+struct ti_sci_msg_resp_lpm_wake_reason {
+ struct ti_sci_msg_hdr hdr;
+ u32 wake_source;
+ u64 wake_timestamp;
+ u8 wake_pin;
+ u8 mode;
+ u32 rsvd[2];
+} __packed;
+
+/**
+ * struct ti_sci_msg_req_lpm_set_device_constraint - Request for
+ * TISCI_MSG_LPM_SET_DEVICE_CONSTRAINT.
+ *
+ * @hdr: TISCI header to provide ACK/NAK flags to the host.
+ * @id: Device ID of device whose constraint has to be modified.
+ * @state: The desired state of device constraint: set or clear.
+ * @rsvd: Reserved for future use.
+ *
+ * This message is used by host to set constraint on the device. This can be
+ * sent anytime after boot before prepare sleep message. Any device can set a
+ * constraint on the low power mode that the SoC can enter. It allows
+ * configurable information to be easily shared from the application, as this
+ * is a non-secure message and therefore can be sent by anyone. By setting a
+ * constraint, the device ensures that it will not be powered off or reset in
+ * the selected mode. Note: Access Restriction: Exclusivity flag of Device will
+ * be honored. If some other host already has constraint on this device ID,
+ * NACK will be returned.
+ */
+struct ti_sci_msg_req_lpm_set_device_constraint {
+ struct ti_sci_msg_hdr hdr;
+ u32 id;
+ u8 state;
+ u32 rsvd[2];
+} __packed;
+
+/**
+ * struct ti_sci_msg_req_lpm_set_latency_constraint - Request for
+ * TISCI_MSG_LPM_SET_LATENCY_CONSTRAINT.
+ *
+ * @hdr: TISCI header to provide ACK/NAK flags to the host.
+ * @wkup_latency: The maximum acceptable latency to wake up from low power mode
+ * in milliseconds. The deeper the state, the higher the latency.
+ * @state: The desired state of wakeup latency constraint: set or clear.
+ * @rsvd: Reserved for future use.
+ *
+ * This message is used by host to set wakeup latency from low power mode. This can
+ * be sent anytime after boot before prepare sleep message, and can be sent after
+ * current low power mode is exited. Any device can set a constraint on the low power
+ * mode that the SoC can enter. It allows configurable information to be easily shared
+ * from the application, as this is a non-secure message and therefore can be sent by
+ * anyone. By setting a wakeup latency constraint, the host ensures that the resume time
+ * from selected low power mode will be less than the constraint value.
+ */
+struct ti_sci_msg_req_lpm_set_latency_constraint {
+ struct ti_sci_msg_hdr hdr;
+ u16 latency;
+ u8 state;
+ u32 rsvd;
+} __packed;
+
#define TI_SCI_IRQ_SECONDARY_HOST_INVALID 0xff
/**