[PATCH v2 4/6] firmware: arm_scmi: add initial support for i.MX MISC protocol
Peng Fan (OSS)
peng.fan at oss.nxp.com
Fri Apr 5 05:39:26 PDT 2024
From: Peng Fan <peng.fan at nxp.com>
The i.MX MISC protocol is for misc settings, such as gpio expander
wakeup.
Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
drivers/firmware/arm_scmi/Kconfig | 10 ++
drivers/firmware/arm_scmi/Makefile | 1 +
drivers/firmware/arm_scmi/imx-sm-misc.c | 305 ++++++++++++++++++++++++++++++++
include/linux/scmi_imx_protocol.h | 17 ++
4 files changed, 333 insertions(+)
diff --git a/drivers/firmware/arm_scmi/Kconfig b/drivers/firmware/arm_scmi/Kconfig
index 56d11c9d9f47..bfeae92f6420 100644
--- a/drivers/firmware/arm_scmi/Kconfig
+++ b/drivers/firmware/arm_scmi/Kconfig
@@ -191,3 +191,13 @@ config IMX_SCMI_BBM_EXT
and BUTTON.
This driver can also be built as a module.
+
+config IMX_SCMI_MISC_EXT
+ tristate "i.MX SCMI MISC EXTENSION"
+ depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF)
+ default y if ARCH_MXC
+ help
+ This enables i.MX System MISC control logic such as gpio expander
+ wakeup
+
+ This driver can also be built as a module.
diff --git a/drivers/firmware/arm_scmi/Makefile b/drivers/firmware/arm_scmi/Makefile
index 327687acf857..a23fde721222 100644
--- a/drivers/firmware/arm_scmi/Makefile
+++ b/drivers/firmware/arm_scmi/Makefile
@@ -12,6 +12,7 @@ scmi-transport-$(CONFIG_ARM_SCMI_TRANSPORT_VIRTIO) += virtio.o
scmi-transport-$(CONFIG_ARM_SCMI_TRANSPORT_OPTEE) += optee.o
scmi-protocols-y = base.o clock.o perf.o power.o reset.o sensors.o system.o voltage.o powercap.o
scmi-protocols-$(CONFIG_IMX_SCMI_BBM_EXT) += imx-sm-bbm.o
+scmi-protocols-$(CONFIG_IMX_SCMI_MISC_EXT) += imx-sm-misc.o
scmi-module-objs := $(scmi-driver-y) $(scmi-protocols-y) $(scmi-transport-y)
obj-$(CONFIG_ARM_SCMI_PROTOCOL) += scmi-core.o
diff --git a/drivers/firmware/arm_scmi/imx-sm-misc.c b/drivers/firmware/arm_scmi/imx-sm-misc.c
new file mode 100644
index 000000000000..1b0ec2281518
--- /dev/null
+++ b/drivers/firmware/arm_scmi/imx-sm-misc.c
@@ -0,0 +1,305 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * System control and Management Interface (SCMI) NXP MISC Protocol
+ *
+ * Copyright 2024 NXP
+ */
+
+#define pr_fmt(fmt) "SCMI Notifications MISC - " fmt
+
+#include <linux/bits.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/scmi_protocol.h>
+#include <linux/scmi_imx_protocol.h>
+
+#include "protocols.h"
+#include "notify.h"
+
+#define SCMI_PROTOCOL_SUPPORTED_VERSION 0x10000
+
+enum scmi_imx_misc_protocol_cmd {
+ SCMI_IMX_MISC_CTRL_SET = 0x3,
+ SCMI_IMX_MISC_CTRL_GET = 0x4,
+ SCMI_IMX_MISC_CTRL_NOTIFY = 0x8,
+};
+
+struct scmi_imx_misc_info {
+ u32 version;
+ u32 nr_dev_ctrl;
+ u32 nr_brd_ctrl;
+ u32 nr_reason;
+};
+
+struct scmi_msg_imx_misc_protocol_attributes {
+ __le32 attributes;
+};
+
+#define GET_BRD_CTRLS_NR(x) le32_get_bits((x), GENMASK(31, 24))
+#define GET_REASONS_NR(x) le32_get_bits((x), GENMASK(23, 16))
+#define GET_DEV_CTRLS_NR(x) le32_get_bits((x), GENMASK(15, 0))
+#define BRD_CTRL_START_ID BIT(15)
+
+struct scmi_imx_misc_ctrl_set_in {
+ __le32 id;
+ __le32 num;
+ __le32 value[MISC_MAX_VAL];
+};
+
+struct scmi_imx_misc_ctrl_notify_in {
+ __le32 ctrl_id;
+ __le32 flags;
+};
+
+struct scmi_imx_misc_ctrl_notify_payld {
+ __le32 ctrl_id;
+ __le32 flags;
+};
+
+struct scmi_imx_misc_ctrl_get_out {
+ __le32 num;
+ __le32 *val;
+};
+
+static int scmi_imx_misc_attributes_get(const struct scmi_protocol_handle *ph,
+ struct scmi_imx_misc_info *mi)
+{
+ int ret;
+ struct scmi_xfer *t;
+ struct scmi_msg_imx_misc_protocol_attributes *attr;
+
+ ret = ph->xops->xfer_get_init(ph, PROTOCOL_ATTRIBUTES, 0,
+ sizeof(*attr), &t);
+ if (ret)
+ return ret;
+
+ attr = t->rx.buf;
+
+ ret = ph->xops->do_xfer(ph, t);
+ if (!ret) {
+ mi->nr_dev_ctrl = GET_DEV_CTRLS_NR(attr->attributes);
+ mi->nr_brd_ctrl = GET_BRD_CTRLS_NR(attr->attributes);
+ mi->nr_reason = GET_REASONS_NR(attr->attributes);
+ dev_info(ph->dev, "i.MX MISC NUM DEV CTRL: %d, NUM BRD CTRL: %d,NUM Reason: %d\n",
+ mi->nr_dev_ctrl, mi->nr_brd_ctrl, mi->nr_reason);
+ }
+
+ ph->xops->xfer_put(ph, t);
+
+ return ret;
+}
+
+static int scmi_imx_misc_ctrl_validate_id(const struct scmi_protocol_handle *ph,
+ u32 ctrl_id)
+{
+ struct scmi_imx_misc_info *mi = ph->get_priv(ph);
+
+ if ((ctrl_id < BRD_CTRL_START_ID) && (ctrl_id > mi->nr_dev_ctrl))
+ return -EINVAL;
+ if (ctrl_id >= BRD_CTRL_START_ID + mi->nr_brd_ctrl)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int scmi_imx_misc_ctrl_notify(const struct scmi_protocol_handle *ph,
+ u32 ctrl_id, u32 flags)
+{
+ struct scmi_imx_misc_ctrl_notify_in *in;
+ struct scmi_xfer *t;
+ int ret;
+
+ ret = scmi_imx_misc_ctrl_validate_id(ph, ctrl_id);
+ if (ret)
+ return ret;
+
+ ret = ph->xops->xfer_get_init(ph, SCMI_IMX_MISC_CTRL_NOTIFY,
+ sizeof(*in), 0, &t);
+ if (ret)
+ return ret;
+
+ in = t->tx.buf;
+ in->ctrl_id = cpu_to_le32(ctrl_id);
+ in->flags = cpu_to_le32(flags);
+
+ ret = ph->xops->do_xfer(ph, t);
+
+ ph->xops->xfer_put(ph, t);
+
+ return ret;
+}
+
+static int
+scmi_imx_misc_ctrl_set_notify_enabled(const struct scmi_protocol_handle *ph,
+ u8 evt_id, u32 src_id, bool enable)
+{
+ int ret;
+
+ ret = scmi_imx_misc_ctrl_notify(ph, src_id, enable ? evt_id : 0);
+ if (ret)
+ dev_err(ph->dev, "FAIL_ENABLED - evt[%X] src[%d] - ret:%d\n",
+ evt_id, src_id, ret);
+
+ return ret;
+}
+
+static int scmi_imx_misc_ctrl_get_num_sources(const struct scmi_protocol_handle *ph)
+{
+ return GENMASK(15, 0);
+}
+
+static void *
+scmi_imx_misc_ctrl_fill_custom_report(const struct scmi_protocol_handle *ph,
+ u8 evt_id, ktime_t timestamp,
+ const void *payld, size_t payld_sz,
+ void *report, u32 *src_id)
+{
+ const struct scmi_imx_misc_ctrl_notify_payld *p = payld;
+ struct scmi_imx_misc_ctrl_notify_report *r = report;
+
+ if (sizeof(*p) != payld_sz)
+ return NULL;
+
+ r->timestamp = timestamp;
+ r->ctrl_id = p->ctrl_id;
+ r->flags = p->flags;
+ *src_id = r->ctrl_id;
+ dev_dbg(ph->dev, "%s: ctrl_id: %d flags: %d\n", __func__,
+ r->ctrl_id, r->flags);
+
+ return r;
+}
+
+static const struct scmi_event_ops scmi_imx_misc_event_ops = {
+ .get_num_sources = scmi_imx_misc_ctrl_get_num_sources,
+ .set_notify_enabled = scmi_imx_misc_ctrl_set_notify_enabled,
+ .fill_custom_report = scmi_imx_misc_ctrl_fill_custom_report,
+};
+
+static const struct scmi_event scmi_imx_misc_events[] = {
+ {
+ .id = SCMI_EVENT_IMX_MISC_CONTROL_DISABLED,
+ .max_payld_sz = sizeof(struct scmi_imx_misc_ctrl_notify_payld),
+ .max_report_sz = sizeof(struct scmi_imx_misc_ctrl_notify_report),
+ },
+ {
+ .id = SCMI_EVENT_IMX_MISC_CONTROL_FALLING_EDGE,
+ .max_payld_sz = sizeof(struct scmi_imx_misc_ctrl_notify_payld),
+ .max_report_sz = sizeof(struct scmi_imx_misc_ctrl_notify_report),
+ },
+ {
+ .id = SCMI_EVENT_IMX_MISC_CONTROL_RISING_EDGE,
+ .max_payld_sz = sizeof(struct scmi_imx_misc_ctrl_notify_payld),
+ .max_report_sz = sizeof(struct scmi_imx_misc_ctrl_notify_report),
+ }
+};
+
+static struct scmi_protocol_events scmi_imx_misc_protocol_events = {
+ .queue_sz = SCMI_PROTO_QUEUE_SZ,
+ .ops = &scmi_imx_misc_event_ops,
+ .evts = scmi_imx_misc_events,
+ .num_events = ARRAY_SIZE(scmi_imx_misc_events),
+};
+
+static int scmi_imx_misc_protocol_init(const struct scmi_protocol_handle *ph)
+{
+ struct scmi_imx_misc_info *minfo;
+ u32 version;
+ int ret;
+
+ ret = ph->xops->version_get(ph, &version);
+ if (ret)
+ return ret;
+
+ dev_info(ph->dev, "NXP SM MISC Version %d.%d\n",
+ PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version));
+
+ minfo = devm_kzalloc(ph->dev, sizeof(*minfo), GFP_KERNEL);
+ if (!minfo)
+ return -ENOMEM;
+
+ ret = scmi_imx_misc_attributes_get(ph, minfo);
+ if (ret)
+ return ret;
+
+ return ph->set_priv(ph, minfo, version);
+}
+
+static int scmi_imx_misc_ctrl_get(const struct scmi_protocol_handle *ph,
+ u32 ctrl_id, u32 *num, u32 *val)
+{
+ struct scmi_imx_misc_ctrl_get_out *out;
+ struct scmi_xfer *t;
+ int ret, i;
+
+ ret = scmi_imx_misc_ctrl_validate_id(ph, ctrl_id);
+ if (ret)
+ return ret;
+
+ ret = ph->xops->xfer_get_init(ph, SCMI_IMX_MISC_CTRL_GET, sizeof(u32),
+ 0, &t);
+ if (ret)
+ return ret;
+
+ put_unaligned_le32(ctrl_id, t->tx.buf);
+ ret = ph->xops->do_xfer(ph, t);
+ if (!ret) {
+ out = t->rx.buf;
+ *num = le32_to_cpu(out->num);
+ for (i = 0; i < *num && i < MISC_MAX_VAL; i++)
+ val[i] = le32_to_cpu(out->val[i]);
+ }
+
+ ph->xops->xfer_put(ph, t);
+
+ return ret;
+}
+
+static int scmi_imx_misc_ctrl_set(const struct scmi_protocol_handle *ph,
+ u32 ctrl_id, u32 num, u32 *val)
+{
+ struct scmi_imx_misc_ctrl_set_in *in;
+ struct scmi_xfer *t;
+ int ret, i;
+
+ ret = scmi_imx_misc_ctrl_validate_id(ph, ctrl_id);
+ if (ret)
+ return ret;
+
+ if (num > MISC_MAX_VAL)
+ return -EINVAL;
+
+ ret = ph->xops->xfer_get_init(ph, SCMI_IMX_MISC_CTRL_SET, sizeof(*in),
+ 0, &t);
+ if (ret)
+ return ret;
+
+ in = t->tx.buf;
+ in->id = cpu_to_le32(ctrl_id);
+ in->num = cpu_to_le32(num);
+ for (i = 0; i < num; i++)
+ in->value[i] = cpu_to_le32(val[i]);
+
+ ret = ph->xops->do_xfer(ph, t);
+
+ ph->xops->xfer_put(ph, t);
+
+ return ret;
+}
+
+static const struct scmi_imx_misc_proto_ops scmi_imx_misc_proto_ops = {
+ .misc_ctrl_set = scmi_imx_misc_ctrl_set,
+ .misc_ctrl_get = scmi_imx_misc_ctrl_get,
+};
+
+static const struct scmi_protocol scmi_imx_misc = {
+ .id = SCMI_PROTOCOL_IMX_MISC,
+ .owner = THIS_MODULE,
+ .instance_init = &scmi_imx_misc_protocol_init,
+ .ops = &scmi_imx_misc_proto_ops,
+ .events = &scmi_imx_misc_protocol_events,
+ .supported_version = SCMI_PROTOCOL_SUPPORTED_VERSION,
+};
+module_scmi_protocol(scmi_imx_misc);
diff --git a/include/linux/scmi_imx_protocol.h b/include/linux/scmi_imx_protocol.h
index 90ce011a4429..a69bd4a20f0f 100644
--- a/include/linux/scmi_imx_protocol.h
+++ b/include/linux/scmi_imx_protocol.h
@@ -13,8 +13,14 @@
#include <linux/notifier.h>
#include <linux/types.h>
+#define SCMI_PAYLOAD_LEN 100
+
+#define SCMI_ARRAY(X, Y) ((SCMI_PAYLOAD_LEN - (X)) / sizeof(Y))
+#define MISC_MAX_VAL SCMI_ARRAY(8, uint32_t)
+
enum scmi_nxp_protocol {
SCMI_PROTOCOL_IMX_BBM = 0x81,
+ SCMI_PROTOCOL_IMX_MISC = 0x84,
};
struct scmi_imx_bbm_proto_ops {
@@ -42,4 +48,15 @@ struct scmi_imx_bbm_notif_report {
unsigned int rtc_id;
unsigned int rtc_evt;
};
+
+struct scmi_imx_misc_ctrl_notify_report {
+ ktime_t timestamp;
+ unsigned int ctrl_id;
+ unsigned int flags;
+};
+
+struct scmi_imx_misc_proto_ops {
+ int (*misc_ctrl_set)(const struct scmi_protocol_handle *ph, u32 id, u32 num, u32 *val);
+ int (*misc_ctrl_get)(const struct scmi_protocol_handle *ph, u32 id, u32 *num, u32 *val);
+};
#endif
--
2.37.1
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