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The System Manager(SM) firmware use SCMI ven= dor protocol(SCMI BBM) to let agent be able to use GPR, RTC and ON/OFF button. Signed-off-by: Peng Fan --- drivers/firmware/arm_scmi/Kconfig | 10 + drivers/firmware/arm_scmi/Makefile | 1 + drivers/firmware/arm_scmi/imx-sm-bbm.c | 378 +++++++++++++++++++++++++++++= ++++ include/linux/scmi_imx_protocol.h | 45 ++++ 4 files changed, 434 insertions(+) diff --git a/drivers/firmware/arm_scmi/Kconfig b/drivers/firmware/arm_scmi/= Kconfig index aa5842be19b2..56d11c9d9f47 100644 --- a/drivers/firmware/arm_scmi/Kconfig +++ b/drivers/firmware/arm_scmi/Kconfig @@ -181,3 +181,13 @@ config ARM_SCMI_POWER_CONTROL early shutdown/reboot SCMI requests. =20 endmenu + +config IMX_SCMI_BBM_EXT + tristate "i.MX SCMI BBM EXTENSION" + depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF) + default y if ARCH_MXC + help + This enables i.MX System BBM control logic which supports RTC + and BUTTON. + + This driver can also be built as a module. diff --git a/drivers/firmware/arm_scmi/Makefile b/drivers/firmware/arm_scmi= /Makefile index a7bc4796519c..327687acf857 100644 --- a/drivers/firmware/arm_scmi/Makefile +++ b/drivers/firmware/arm_scmi/Makefile @@ -11,6 +11,7 @@ scmi-transport-$(CONFIG_ARM_SCMI_HAVE_MSG) +=3D msg.o scmi-transport-$(CONFIG_ARM_SCMI_TRANSPORT_VIRTIO) +=3D virtio.o scmi-transport-$(CONFIG_ARM_SCMI_TRANSPORT_OPTEE) +=3D optee.o scmi-protocols-y =3D base.o clock.o perf.o power.o reset.o sensors.o syste= m.o voltage.o powercap.o +scmi-protocols-$(CONFIG_IMX_SCMI_BBM_EXT) +=3D imx-sm-bbm.o scmi-module-objs :=3D $(scmi-driver-y) $(scmi-protocols-y) $(scmi-transpor= t-y) =20 obj-$(CONFIG_ARM_SCMI_PROTOCOL) +=3D scmi-core.o diff --git a/drivers/firmware/arm_scmi/imx-sm-bbm.c b/drivers/firmware/arm_= scmi/imx-sm-bbm.c new file mode 100644 index 000000000000..7ee699cc4215 --- /dev/null +++ b/drivers/firmware/arm_scmi/imx-sm-bbm.c @@ -0,0 +1,378 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * System Control and Management Interface (SCMI) NXP BBM Protocol + * + * Copyright 2024 NXP + */ + +#define pr_fmt(fmt) "SCMI Notifications BBM - " fmt + +#include +#include +#include +#include +#include +#include +#include + +#include "protocols.h" +#include "notify.h" + +#define SCMI_PROTOCOL_SUPPORTED_VERSION 0x10000 + +enum scmi_imx_bbm_protocol_cmd { + IMX_BBM_GPR_SET =3D 0x3, + IMX_BBM_GPR_GET =3D 0x4, + IMX_BBM_RTC_ATTRIBUTES =3D 0x5, + IMX_BBM_RTC_TIME_SET =3D 0x6, + IMX_BBM_RTC_TIME_GET =3D 0x7, + IMX_BBM_RTC_ALARM_SET =3D 0x8, + IMX_BBM_BUTTON_GET =3D 0x9, + IMX_BBM_RTC_NOTIFY =3D 0xA, + IMX_BBM_BUTTON_NOTIFY =3D 0xB, +}; + +#define GET_RTCS_NR(x) le32_get_bits((x), GENMASK(23, 16)) +#define GET_GPRS_NR(x) le32_get_bits((x), GENMASK(15, 0)) + +#define SCMI_IMX_BBM_NOTIFY_RTC_UPDATED BIT(2) +#define SCMI_IMX_BBM_NOTIFY_RTC_ROLLOVER BIT(1) +#define SCMI_IMX_BBM_NOTIFY_RTC_ALARM BIT(0) + +#define SCMI_IMX_BBM_RTC_ALARM_ENABLE_FLAG BIT(0) + +#define SCMI_IMX_BBM_NOTIFY_RTC_FLAG \ + (SCMI_IMX_BBM_NOTIFY_RTC_UPDATED | SCMI_IMX_BBM_NOTIFY_RTC_ROLLOVER | \ + SCMI_IMX_BBM_NOTIFY_RTC_ALARM) + +#define SCMI_IMX_BBM_EVENT_RTC_MASK GENMASK(31, 24) + +struct scmi_imx_bbm_info { + u32 version; + int nr_rtc; + int nr_gpr; +}; + +struct scmi_msg_imx_bbm_protocol_attributes { + __le32 attributes; +}; + +struct scmi_imx_bbm_set_time { + __le32 id; + __le32 flags; + __le32 value_low; + __le32 value_high; +}; + +struct scmi_imx_bbm_get_time { + __le32 id; + __le32 flags; +}; + +struct scmi_imx_bbm_alarm_time { + __le32 id; + __le32 flags; + __le32 value_low; + __le32 value_high; +}; + +struct scmi_msg_imx_bbm_rtc_notify { + __le32 rtc_id; + __le32 flags; +}; + +struct scmi_msg_imx_bbm_button_notify { + __le32 flags; +}; + +struct scmi_imx_bbm_notify_payld { + __le32 flags; +}; + +static int scmi_imx_bbm_attributes_get(const struct scmi_protocol_handle *= ph, + struct scmi_imx_bbm_info *pi) +{ + int ret; + struct scmi_xfer *t; + struct scmi_msg_imx_bbm_protocol_attributes *attr; + + ret =3D ph->xops->xfer_get_init(ph, PROTOCOL_ATTRIBUTES, 0, sizeof(*attr)= , &t); + if (ret) + return ret; + + attr =3D t->rx.buf; + + ret =3D ph->xops->do_xfer(ph, t); + if (!ret) { + pi->nr_rtc =3D GET_RTCS_NR(attr->attributes); + pi->nr_gpr =3D GET_GPRS_NR(attr->attributes); + } + + ph->xops->xfer_put(ph, t); + + return ret; +} + +static int scmi_imx_bbm_notify(const struct scmi_protocol_handle *ph, + u32 src_id, int message_id, bool enable) +{ + int ret; + struct scmi_xfer *t; + + if (message_id =3D=3D IMX_BBM_RTC_NOTIFY) { + struct scmi_msg_imx_bbm_rtc_notify *rtc_notify; + + ret =3D ph->xops->xfer_get_init(ph, message_id, + sizeof(*rtc_notify), 0, &t); + if (ret) + return ret; + + rtc_notify =3D t->tx.buf; + rtc_notify->rtc_id =3D cpu_to_le32(0); + rtc_notify->flags =3D + cpu_to_le32(enable ? SCMI_IMX_BBM_NOTIFY_RTC_FLAG : 0); + } else if (message_id =3D=3D IMX_BBM_BUTTON_NOTIFY) { + struct scmi_msg_imx_bbm_button_notify *button_notify; + + ret =3D ph->xops->xfer_get_init(ph, message_id, + sizeof(*button_notify), 0, &t); + if (ret) + return ret; + + button_notify =3D t->tx.buf; + button_notify->flags =3D cpu_to_le32(enable ? 1 : 0); + } else { + return -EINVAL; + } + + ret =3D ph->xops->do_xfer(ph, t); + + ph->xops->xfer_put(ph, t); + return ret; +} + +static enum scmi_imx_bbm_protocol_cmd evt_2_cmd[] =3D { + IMX_BBM_RTC_NOTIFY, + IMX_BBM_BUTTON_NOTIFY +}; + +static int scmi_imx_bbm_set_notify_enabled(const struct scmi_protocol_hand= le *ph, + u8 evt_id, u32 src_id, bool enable) +{ + int ret, cmd_id; + + if (evt_id >=3D ARRAY_SIZE(evt_2_cmd)) + return -EINVAL; + + cmd_id =3D evt_2_cmd[evt_id]; + ret =3D scmi_imx_bbm_notify(ph, src_id, cmd_id, enable); + if (ret) + pr_debug("FAIL_ENABLED - evt[%X] dom[%d] - ret:%d\n", + evt_id, src_id, ret); + + return ret; +} + +static void *scmi_imx_bbm_fill_custom_report(const struct scmi_protocol_ha= ndle *ph, + u8 evt_id, ktime_t timestamp, + const void *payld, size_t payld_sz, + void *report, u32 *src_id) +{ + const struct scmi_imx_bbm_notify_payld *p =3D payld; + struct scmi_imx_bbm_notif_report *r =3D report; + + if (sizeof(*p) !=3D payld_sz) + return NULL; + + if (evt_id =3D=3D SCMI_EVENT_IMX_BBM_RTC) { + r->is_rtc =3D true; + r->is_button =3D false; + r->timestamp =3D timestamp; + r->rtc_id =3D le32_get_bits(p->flags, SCMI_IMX_BBM_EVENT_RTC_MASK); + r->rtc_evt =3D le32_get_bits(p->flags, SCMI_IMX_BBM_NOTIFY_RTC_FLAG); + dev_dbg(ph->dev, "RTC: %d evt: %x\n", r->rtc_id, r->rtc_evt); + *src_id =3D r->rtc_evt; + } else if (evt_id =3D=3D SCMI_EVENT_IMX_BBM_BUTTON) { + r->is_rtc =3D false; + r->is_button =3D true; + r->timestamp =3D timestamp; + dev_dbg(ph->dev, "BBM Button\n"); + *src_id =3D 0; + } else { + WARN_ON_ONCE(1); + return NULL; + } + + return r; +} + +static const struct scmi_event scmi_imx_bbm_events[] =3D { + { + .id =3D SCMI_EVENT_IMX_BBM_RTC, + .max_payld_sz =3D sizeof(struct scmi_imx_bbm_notify_payld), + .max_report_sz =3D sizeof(struct scmi_imx_bbm_notif_report), + }, + { + .id =3D SCMI_EVENT_IMX_BBM_BUTTON, + .max_payld_sz =3D sizeof(struct scmi_imx_bbm_notify_payld), + .max_report_sz =3D sizeof(struct scmi_imx_bbm_notif_report), + }, +}; + +static const struct scmi_event_ops scmi_imx_bbm_event_ops =3D { + .set_notify_enabled =3D scmi_imx_bbm_set_notify_enabled, + .fill_custom_report =3D scmi_imx_bbm_fill_custom_report, +}; + +static const struct scmi_protocol_events scmi_imx_bbm_protocol_events =3D { + .queue_sz =3D SCMI_PROTO_QUEUE_SZ, + .ops =3D &scmi_imx_bbm_event_ops, + .evts =3D scmi_imx_bbm_events, + .num_events =3D ARRAY_SIZE(scmi_imx_bbm_events), + .num_sources =3D 1, +}; + +static int scmi_imx_bbm_protocol_init(const struct scmi_protocol_handle *p= h) +{ + u32 version; + int ret; + struct scmi_imx_bbm_info *binfo; + + ret =3D ph->xops->version_get(ph, &version); + if (ret) + return ret; + + dev_info(ph->dev, "NXP SM BBM Version %d.%d\n", + PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version)); + + binfo =3D devm_kzalloc(ph->dev, sizeof(*binfo), GFP_KERNEL); + if (!binfo) + return -ENOMEM; + + ret =3D scmi_imx_bbm_attributes_get(ph, binfo); + if (ret) + return ret; + + return ph->set_priv(ph, binfo, version); +} + +static int scmi_imx_bbm_rtc_time_set(const struct scmi_protocol_handle *ph, + u32 rtc_id, u64 sec) +{ + struct scmi_imx_bbm_info *pi =3D ph->get_priv(ph); + struct scmi_imx_bbm_set_time *cfg; + struct scmi_xfer *t; + int ret; + + if (rtc_id >=3D pi->nr_rtc) + return -EINVAL; + + ret =3D ph->xops->xfer_get_init(ph, IMX_BBM_RTC_TIME_SET, sizeof(*cfg), 0= , &t); + if (ret) + return ret; + + cfg =3D t->tx.buf; + cfg->id =3D cpu_to_le32(rtc_id); + cfg->flags =3D 0; + cfg->value_low =3D cpu_to_le32(lower_32_bits(sec)); + cfg->value_high =3D cpu_to_le32(upper_32_bits(sec)); + + ret =3D ph->xops->do_xfer(ph, t); + + ph->xops->xfer_put(ph, t); + + return ret; +} + +static int scmi_imx_bbm_rtc_time_get(const struct scmi_protocol_handle *ph, + u32 rtc_id, u64 *value) +{ + struct scmi_imx_bbm_info *pi =3D ph->get_priv(ph); + struct scmi_imx_bbm_get_time *cfg; + struct scmi_xfer *t; + int ret; + + if (rtc_id >=3D pi->nr_rtc) + return -EINVAL; + + ret =3D ph->xops->xfer_get_init(ph, IMX_BBM_RTC_TIME_GET, sizeof(*cfg), + sizeof(u64), &t); + if (ret) + return ret; + + cfg =3D t->tx.buf; + cfg->id =3D cpu_to_le32(rtc_id); + cfg->flags =3D 0; + + ret =3D ph->xops->do_xfer(ph, t); + if (!ret) + *value =3D get_unaligned_le64(t->rx.buf); + + ph->xops->xfer_put(ph, t); + + return ret; +} + +static int scmi_imx_bbm_rtc_alarm_set(const struct scmi_protocol_handle *p= h, + u32 rtc_id, u64 sec) +{ + struct scmi_imx_bbm_info *pi =3D ph->get_priv(ph); + struct scmi_imx_bbm_alarm_time *cfg; + struct scmi_xfer *t; + int ret; + + if (rtc_id >=3D pi->nr_rtc) + return -EINVAL; + + ret =3D ph->xops->xfer_get_init(ph, IMX_BBM_RTC_ALARM_SET, sizeof(*cfg), = 0, &t); + if (ret) + return ret; + + cfg =3D t->tx.buf; + cfg->id =3D cpu_to_le32(rtc_id); + cfg->flags =3D SCMI_IMX_BBM_RTC_ALARM_ENABLE_FLAG; + cfg->value_low =3D cpu_to_le32(lower_32_bits(sec)); + cfg->value_high =3D cpu_to_le32(upper_32_bits(sec)); + + ret =3D ph->xops->do_xfer(ph, t); + + ph->xops->xfer_put(ph, t); + + return ret; +} + +static int scmi_imx_bbm_button_get(const struct scmi_protocol_handle *ph, = u32 *state) +{ + struct scmi_xfer *t; + int ret; + + ret =3D ph->xops->xfer_get_init(ph, IMX_BBM_BUTTON_GET, 0, sizeof(u32), &= t); + if (ret) + return ret; + + ret =3D ph->xops->do_xfer(ph, t); + if (!ret) + *state =3D get_unaligned_le32(t->rx.buf); + + ph->xops->xfer_put(ph, t); + + return ret; +} + +static const struct scmi_imx_bbm_proto_ops scmi_imx_bbm_proto_ops =3D { + .rtc_time_get =3D scmi_imx_bbm_rtc_time_get, + .rtc_time_set =3D scmi_imx_bbm_rtc_time_set, + .rtc_alarm_set =3D scmi_imx_bbm_rtc_alarm_set, + .button_get =3D scmi_imx_bbm_button_get, +}; + +static const struct scmi_protocol scmi_imx_bbm =3D { + .id =3D SCMI_PROTOCOL_IMX_BBM, + .owner =3D THIS_MODULE, + .instance_init =3D &scmi_imx_bbm_protocol_init, + .ops =3D &scmi_imx_bbm_proto_ops, + .events =3D &scmi_imx_bbm_protocol_events, + .supported_version =3D SCMI_PROTOCOL_SUPPORTED_VERSION, +}; + +module_scmi_protocol(scmi_imx_bbm); diff --git a/include/linux/scmi_imx_protocol.h b/include/linux/scmi_imx_pro= tocol.h new file mode 100644 index 000000000000..90ce011a4429 --- /dev/null +++ b/include/linux/scmi_imx_protocol.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * SCMI Message Protocol driver NXP extension header + * + * Copyright 2024 NXP. + */ + +#ifndef _LINUX_SCMI_NXP_PROTOCOL_H +#define _LINUX_SCMI_NXP_PROTOCOL_H + +#include +#include +#include +#include + +enum scmi_nxp_protocol { + SCMI_PROTOCOL_IMX_BBM =3D 0x81, +}; + +struct scmi_imx_bbm_proto_ops { + int (*rtc_time_set)(const struct scmi_protocol_handle *ph, u32 id, + uint64_t sec); + int (*rtc_time_get)(const struct scmi_protocol_handle *ph, u32 id, + u64 *val); + int (*rtc_alarm_set)(const struct scmi_protocol_handle *ph, u32 id, + u64 sec); + int (*button_get)(const struct scmi_protocol_handle *ph, u32 *state); +}; + +enum scmi_nxp_notification_events { + SCMI_EVENT_IMX_BBM_RTC =3D 0x0, + SCMI_EVENT_IMX_BBM_BUTTON =3D 0x1, + SCMI_EVENT_IMX_MISC_CONTROL_DISABLED =3D 0x0, + SCMI_EVENT_IMX_MISC_CONTROL_FALLING_EDGE =3D 0x1, + SCMI_EVENT_IMX_MISC_CONTROL_RISING_EDGE =3D 0x2, +}; + +struct scmi_imx_bbm_notif_report { + bool is_rtc; + bool is_button; + ktime_t timestamp; + unsigned int rtc_id; + unsigned int rtc_evt; +}; +#endif --=20 2.37.1