Re: [PATCH v2 4/6] firmware: arm_scmi: add initial support for i.MX MISC protocol

From: Marco Felsch
Date: Fri Apr 05 2024 - 12:44:42 EST

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In reply to: Peng Fan (OSS): "[PATCH v2 4/6] firmware: arm_scmi: add initial support for i.MX MISC protocol"
Next in thread: Peng Fan: "RE: [PATCH v2 4/6] firmware: arm_scmi: add initial support for i.MX MISC protocol"
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Hi Peng,

On 24-04-05, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@xxxxxxx>
>
> The i.MX MISC protocol is for misc settings, such as gpio expander
> wakeup.

Can you elaborate a bit more please?

Regards,
Marco

>
> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
> ---
> 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
>
>
>

Next message: Kuppuswamy Sathyanarayanan: "Re: [PATCH v1 1/1] gpio: wcove: Use -ENOTSUPP consistently"
Previous message: Vinod Koul: "Re: [PATCH v4 08/18] phy: ti: phy-j721e-wiz: add resume support"
In reply to: Peng Fan (OSS): "[PATCH v2 4/6] firmware: arm_scmi: add initial support for i.MX MISC protocol"
Next in thread: Peng Fan: "RE: [PATCH v2 4/6] firmware: arm_scmi: add initial support for i.MX MISC protocol"
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