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Fri, 23 Aug 2024 08:56:55 +0000 Received: from PAXPR04MB8459.eurprd04.prod.outlook.com ([fe80::165a:30a2:5835:9630]) by PAXPR04MB8459.eurprd04.prod.outlook.com ([fe80::165a:30a2:5835:9630%6]) with mapi id 15.20.7897.014; Fri, 23 Aug 2024 08:56:55 +0000 From: "Peng Fan (OSS)" Date: Fri, 23 Aug 2024 17:05:18 +0800 Subject: [PATCH v8 2/7] firmware: arm_scmi: add initial support for i.MX BBM protocol Message-Id: <20240823-imx95-bbm-misc-v2-v8-2-e600ed9e9271@nxp.com> References: <20240823-imx95-bbm-misc-v2-v8-0-e600ed9e9271@nxp.com> In-Reply-To: <20240823-imx95-bbm-misc-v2-v8-0-e600ed9e9271@nxp.com> To: Sudeep Holla , Cristian Marussi , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Peng Fan , Alexandre Belloni , Dmitry Torokhov Cc: arm-scmi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-rtc@vger.kernel.org, linux-input@vger.kernel.org X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; 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The System Manager(SM) firmware use SCMI vendor protocol(SCMI BBM) to let agent be able to use GPR, RTC and ON/OFF button. Reviewed-by: Cristian Marussi Signed-off-by: Peng Fan --- drivers/firmware/arm_scmi/Kconfig | 1 + drivers/firmware/arm_scmi/Makefile | 1 + drivers/firmware/arm_scmi/vendors/imx/Kconfig | 13 + drivers/firmware/arm_scmi/vendors/imx/Makefile | 2 + drivers/firmware/arm_scmi/vendors/imx/imx-sm-bbm.c | 379 +++++++++++++++++++++ include/linux/scmi_imx_protocol.h | 42 +++ 6 files changed, 438 insertions(+) diff --git a/drivers/firmware/arm_scmi/Kconfig b/drivers/firmware/arm_scmi/Kconfig index 67053c1862d1..dabd874641d0 100644 --- a/drivers/firmware/arm_scmi/Kconfig +++ b/drivers/firmware/arm_scmi/Kconfig @@ -70,6 +70,7 @@ config ARM_SCMI_DEBUG_COUNTERS SCMI monitoring. source "drivers/firmware/arm_scmi/transports/Kconfig" +source "drivers/firmware/arm_scmi/vendors/imx/Kconfig" endif #ARM_SCMI_PROTOCOL diff --git a/drivers/firmware/arm_scmi/Makefile b/drivers/firmware/arm_scmi/Makefile index 9659b7d1b963..9ac81adff567 100644 --- a/drivers/firmware/arm_scmi/Makefile +++ b/drivers/firmware/arm_scmi/Makefile @@ -11,6 +11,7 @@ scmi-protocols-y += pinctrl.o scmi-module-objs := $(scmi-driver-y) $(scmi-protocols-y) $(scmi-transport-y) obj-$(CONFIG_ARM_SCMI_PROTOCOL) += transports/ +obj-$(CONFIG_ARM_SCMI_PROTOCOL) += vendors/imx/ obj-$(CONFIG_ARM_SCMI_PROTOCOL) += scmi-core.o obj-$(CONFIG_ARM_SCMI_PROTOCOL) += scmi-module.o diff --git a/drivers/firmware/arm_scmi/vendors/imx/Kconfig b/drivers/firmware/arm_scmi/vendors/imx/Kconfig new file mode 100644 index 000000000000..51ccbd038627 --- /dev/null +++ b/drivers/firmware/arm_scmi/vendors/imx/Kconfig @@ -0,0 +1,13 @@ +# SPDX-License-Identifier: GPL-2.0-only +menu "ARM SCMI NXP i.MX Vendor Protocols" + +config IMX_SCMI_BBM_EXT + tristate "i.MX SCMI BBM EXTENSION" + depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF) + default y if ARCH_MXC + help + This enables i.MX System BBM control logic which supports RTC + and BUTTON. + + This driver can also be built as a module. +endmenu diff --git a/drivers/firmware/arm_scmi/vendors/imx/Makefile b/drivers/firmware/arm_scmi/vendors/imx/Makefile new file mode 100644 index 000000000000..a7dbdd20dbb9 --- /dev/null +++ b/drivers/firmware/arm_scmi/vendors/imx/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_IMX_SCMI_BBM_EXT) += imx-sm-bbm.o diff --git a/drivers/firmware/arm_scmi/vendors/imx/imx-sm-bbm.c b/drivers/firmware/arm_scmi/vendors/imx/imx-sm-bbm.c new file mode 100644 index 000000000000..0df7ca135c34 --- /dev/null +++ b/drivers/firmware/arm_scmi/vendors/imx/imx-sm-bbm.c @@ -0,0 +1,379 @@ +// 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 = 0x3, + IMX_BBM_GPR_GET = 0x4, + IMX_BBM_RTC_ATTRIBUTES = 0x5, + IMX_BBM_RTC_TIME_SET = 0x6, + IMX_BBM_RTC_TIME_GET = 0x7, + IMX_BBM_RTC_ALARM_SET = 0x8, + IMX_BBM_BUTTON_GET = 0x9, + IMX_BBM_RTC_NOTIFY = 0xA, + IMX_BBM_BUTTON_NOTIFY = 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 = 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) { + pi->nr_rtc = GET_RTCS_NR(attr->attributes); + pi->nr_gpr = 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 == IMX_BBM_RTC_NOTIFY) { + struct scmi_msg_imx_bbm_rtc_notify *rtc_notify; + + ret = ph->xops->xfer_get_init(ph, message_id, + sizeof(*rtc_notify), 0, &t); + if (ret) + return ret; + + rtc_notify = t->tx.buf; + rtc_notify->rtc_id = cpu_to_le32(0); + rtc_notify->flags = + cpu_to_le32(enable ? SCMI_IMX_BBM_NOTIFY_RTC_FLAG : 0); + } else if (message_id == IMX_BBM_BUTTON_NOTIFY) { + struct scmi_msg_imx_bbm_button_notify *button_notify; + + ret = ph->xops->xfer_get_init(ph, message_id, + sizeof(*button_notify), 0, &t); + if (ret) + return ret; + + button_notify = t->tx.buf; + button_notify->flags = cpu_to_le32(enable ? 1 : 0); + } else { + return -EINVAL; + } + + ret = ph->xops->do_xfer(ph, t); + + ph->xops->xfer_put(ph, t); + return ret; +} + +static enum scmi_imx_bbm_protocol_cmd evt_2_cmd[] = { + IMX_BBM_RTC_NOTIFY, + IMX_BBM_BUTTON_NOTIFY +}; + +static int scmi_imx_bbm_set_notify_enabled(const struct scmi_protocol_handle *ph, + u8 evt_id, u32 src_id, bool enable) +{ + int ret, cmd_id; + + if (evt_id >= ARRAY_SIZE(evt_2_cmd)) + return -EINVAL; + + cmd_id = evt_2_cmd[evt_id]; + ret = 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_handle *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 = payld; + struct scmi_imx_bbm_notif_report *r = report; + + if (sizeof(*p) != payld_sz) + return NULL; + + if (evt_id == SCMI_EVENT_IMX_BBM_RTC) { + r->is_rtc = true; + r->is_button = false; + r->timestamp = timestamp; + r->rtc_id = le32_get_bits(p->flags, SCMI_IMX_BBM_EVENT_RTC_MASK); + r->rtc_evt = 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 = r->rtc_evt; + } else if (evt_id == SCMI_EVENT_IMX_BBM_BUTTON) { + r->is_rtc = false; + r->is_button = true; + r->timestamp = timestamp; + dev_dbg(ph->dev, "BBM Button\n"); + *src_id = 0; + } else { + WARN_ON_ONCE(1); + return NULL; + } + + return r; +} + +static const struct scmi_event scmi_imx_bbm_events[] = { + { + .id = SCMI_EVENT_IMX_BBM_RTC, + .max_payld_sz = sizeof(struct scmi_imx_bbm_notify_payld), + .max_report_sz = sizeof(struct scmi_imx_bbm_notif_report), + }, + { + .id = SCMI_EVENT_IMX_BBM_BUTTON, + .max_payld_sz = sizeof(struct scmi_imx_bbm_notify_payld), + .max_report_sz = sizeof(struct scmi_imx_bbm_notif_report), + }, +}; + +static const struct scmi_event_ops scmi_imx_bbm_event_ops = { + .set_notify_enabled = scmi_imx_bbm_set_notify_enabled, + .fill_custom_report = scmi_imx_bbm_fill_custom_report, +}; + +static const struct scmi_protocol_events scmi_imx_bbm_protocol_events = { + .queue_sz = SCMI_PROTO_QUEUE_SZ, + .ops = &scmi_imx_bbm_event_ops, + .evts = scmi_imx_bbm_events, + .num_events = ARRAY_SIZE(scmi_imx_bbm_events), + .num_sources = 1, +}; + +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 = ph->get_priv(ph); + struct scmi_imx_bbm_set_time *cfg; + struct scmi_xfer *t; + int ret; + + if (rtc_id >= pi->nr_rtc) + return -EINVAL; + + ret = ph->xops->xfer_get_init(ph, IMX_BBM_RTC_TIME_SET, sizeof(*cfg), 0, &t); + if (ret) + return ret; + + cfg = t->tx.buf; + cfg->id = cpu_to_le32(rtc_id); + cfg->flags = 0; + cfg->value_low = cpu_to_le32(lower_32_bits(sec)); + cfg->value_high = cpu_to_le32(upper_32_bits(sec)); + + ret = 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 = ph->get_priv(ph); + struct scmi_imx_bbm_get_time *cfg; + struct scmi_xfer *t; + int ret; + + if (rtc_id >= pi->nr_rtc) + return -EINVAL; + + ret = ph->xops->xfer_get_init(ph, IMX_BBM_RTC_TIME_GET, sizeof(*cfg), + sizeof(u64), &t); + if (ret) + return ret; + + cfg = t->tx.buf; + cfg->id = cpu_to_le32(rtc_id); + cfg->flags = 0; + + ret = ph->xops->do_xfer(ph, t); + if (!ret) + *value = 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 *ph, + u32 rtc_id, bool enable, u64 sec) +{ + struct scmi_imx_bbm_info *pi = ph->get_priv(ph); + struct scmi_imx_bbm_alarm_time *cfg; + struct scmi_xfer *t; + int ret; + + if (rtc_id >= pi->nr_rtc) + return -EINVAL; + + ret = ph->xops->xfer_get_init(ph, IMX_BBM_RTC_ALARM_SET, sizeof(*cfg), 0, &t); + if (ret) + return ret; + + cfg = t->tx.buf; + cfg->id = cpu_to_le32(rtc_id); + cfg->flags = enable ? SCMI_IMX_BBM_RTC_ALARM_ENABLE_FLAG : 0; + cfg->value_low = cpu_to_le32(lower_32_bits(sec)); + cfg->value_high = cpu_to_le32(upper_32_bits(sec)); + + ret = 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 = ph->xops->xfer_get_init(ph, IMX_BBM_BUTTON_GET, 0, sizeof(u32), &t); + if (ret) + return ret; + + ret = ph->xops->do_xfer(ph, t); + if (!ret) + *state = 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 = { + .rtc_time_get = scmi_imx_bbm_rtc_time_get, + .rtc_time_set = scmi_imx_bbm_rtc_time_set, + .rtc_alarm_set = scmi_imx_bbm_rtc_alarm_set, + .button_get = scmi_imx_bbm_button_get, +}; + +static int scmi_imx_bbm_protocol_init(const struct scmi_protocol_handle *ph) +{ + u32 version; + int ret; + struct scmi_imx_bbm_info *binfo; + + ret = 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 = devm_kzalloc(ph->dev, sizeof(*binfo), GFP_KERNEL); + if (!binfo) + return -ENOMEM; + + ret = scmi_imx_bbm_attributes_get(ph, binfo); + if (ret) + return ret; + + return ph->set_priv(ph, binfo, version); +} + +static const struct scmi_protocol scmi_imx_bbm = { + .id = SCMI_PROTOCOL_IMX_BBM, + .owner = THIS_MODULE, + .instance_init = &scmi_imx_bbm_protocol_init, + .ops = &scmi_imx_bbm_proto_ops, + .events = &scmi_imx_bbm_protocol_events, + .supported_version = SCMI_PROTOCOL_SUPPORTED_VERSION, + .vendor_id = "NXP", + .sub_vendor_id = "IMX", +}; +module_scmi_protocol(scmi_imx_bbm); diff --git a/include/linux/scmi_imx_protocol.h b/include/linux/scmi_imx_protocol.h new file mode 100644 index 000000000000..2df2ea0f1809 --- /dev/null +++ b/include/linux/scmi_imx_protocol.h @@ -0,0 +1,42 @@ +/* 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 = 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, + bool enable, u64 sec); + int (*button_get)(const struct scmi_protocol_handle *ph, u32 *state); +}; + +enum scmi_nxp_notification_events { + SCMI_EVENT_IMX_BBM_RTC = 0x0, + SCMI_EVENT_IMX_BBM_BUTTON = 0x1, +}; + +struct scmi_imx_bbm_notif_report { + bool is_rtc; + bool is_button; + ktime_t timestamp; + unsigned int rtc_id; + unsigned int rtc_evt; +}; +#endif