diff options
| -rw-r--r-- | Documentation/devicetree/bindings/firmware/arm,scmi.yaml | 54 | ||||
| -rw-r--r-- | MAINTAINERS | 1 | ||||
| -rw-r--r-- | drivers/firmware/arm_scmi/Makefile | 3 | ||||
| -rw-r--r-- | drivers/firmware/arm_scmi/common.h | 11 | ||||
| -rw-r--r-- | drivers/firmware/arm_scmi/driver.c | 269 | ||||
| -rw-r--r-- | drivers/firmware/arm_scmi/mailbox.c | 3 | ||||
| -rw-r--r-- | drivers/firmware/arm_scmi/notify.c | 30 | ||||
| -rw-r--r-- | drivers/firmware/arm_scmi/perf.c | 15 | ||||
| -rw-r--r-- | drivers/firmware/arm_scmi/pinctrl.c | 916 | ||||
| -rw-r--r-- | drivers/firmware/arm_scmi/protocols.h | 18 | ||||
| -rw-r--r-- | drivers/pinctrl/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/pinctrl/Makefile | 1 | ||||
| -rw-r--r-- | drivers/pinctrl/pinctrl-scmi.c | 571 | ||||
| -rw-r--r-- | include/linux/scmi_protocol.h | 86 | ||||
| -rw-r--r-- | include/trace/events/scmi.h | 6 |
15 files changed, 1925 insertions, 70 deletions
diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml index 4591523b51a0..7de2c29606e5 100644 --- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml +++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml @@ -247,6 +247,37 @@ properties: reg: const: 0x18 + protocol@19: + type: object + allOf: + - $ref: '#/$defs/protocol-node' + - $ref: /schemas/pinctrl/pinctrl.yaml + + unevaluatedProperties: false + + properties: + reg: + const: 0x19 + + patternProperties: + '-pins$': + type: object + allOf: + - $ref: /schemas/pinctrl/pincfg-node.yaml# + - $ref: /schemas/pinctrl/pinmux-node.yaml# + unevaluatedProperties: false + + description: + A pin multiplexing sub-node describes how to configure a + set of pins in some desired function. + A single sub-node may define several pin configurations. + This sub-node is using the default pinctrl bindings to configure + pin multiplexing and using SCMI protocol to apply a specified + configuration. + + required: + - reg + additionalProperties: false $defs: @@ -355,7 +386,7 @@ examples: scmi_dvfs: protocol@13 { reg = <0x13>; - #clock-cells = <1>; + #power-domain-cells = <1>; mboxes = <&mhuB 1 0>, <&mhuB 1 1>; @@ -401,6 +432,25 @@ examples: scmi_powercap: protocol@18 { reg = <0x18>; }; + + scmi_pinctrl: protocol@19 { + reg = <0x19>; + + i2c2-pins { + groups = "g_i2c2_a", "g_i2c2_b"; + function = "f_i2c2"; + }; + + mdio-pins { + groups = "g_avb_mdio"; + drive-strength = <24>; + }; + + keys_pins: keys-pins { + pins = "gpio_5_17", "gpio_5_20", "gpio_5_22", "gpio_2_1"; + bias-pull-up; + }; + }; }; }; @@ -468,7 +518,7 @@ examples: reg = <0x13>; linaro,optee-channel-id = <1>; shmem = <&cpu_optee_lpri0>; - #clock-cells = <1>; + #power-domain-cells = <1>; }; scmi_clk0: protocol@14 { diff --git a/MAINTAINERS b/MAINTAINERS index b6f2b6e92961..0137547ff172 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -21522,6 +21522,7 @@ F: drivers/cpufreq/sc[mp]i-cpufreq.c F: drivers/firmware/arm_scmi/ F: drivers/firmware/arm_scpi.c F: drivers/hwmon/scmi-hwmon.c +F: drivers/pinctrl/pinctrl-scmi.c F: drivers/pmdomain/arm/ F: drivers/powercap/arm_scmi_powercap.c F: drivers/regulator/scmi-regulator.c diff --git a/drivers/firmware/arm_scmi/Makefile b/drivers/firmware/arm_scmi/Makefile index a7bc4796519c..fd59f58ce8a2 100644 --- a/drivers/firmware/arm_scmi/Makefile +++ b/drivers/firmware/arm_scmi/Makefile @@ -10,7 +10,8 @@ scmi-transport-$(CONFIG_ARM_SCMI_TRANSPORT_SMC) += smc.o scmi-transport-$(CONFIG_ARM_SCMI_HAVE_MSG) += msg.o scmi-transport-$(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-y := base.o clock.o perf.o power.o reset.o sensors.o system.o voltage.o powercap.o +scmi-protocols-y += pinctrl.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/common.h b/drivers/firmware/arm_scmi/common.h index 6affbfdd1dec..b5ac25dbc1ca 100644 --- a/drivers/firmware/arm_scmi/common.h +++ b/drivers/firmware/arm_scmi/common.h @@ -301,6 +301,17 @@ extern const struct scmi_desc scmi_optee_desc; void scmi_rx_callback(struct scmi_chan_info *cinfo, u32 msg_hdr, void *priv); +enum scmi_bad_msg { + MSG_UNEXPECTED = -1, + MSG_INVALID = -2, + MSG_UNKNOWN = -3, + MSG_NOMEM = -4, + MSG_MBOX_SPURIOUS = -5, +}; + +void scmi_bad_message_trace(struct scmi_chan_info *cinfo, u32 msg_hdr, + enum scmi_bad_msg err); + /* shmem related declarations */ struct scmi_shared_mem; diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 2709598f3008..6b6957f4743f 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -33,6 +33,7 @@ #include <linux/processor.h> #include <linux/refcount.h> #include <linux/slab.h> +#include <linux/xarray.h> #include "common.h" #include "notify.h" @@ -44,8 +45,7 @@ static DEFINE_IDA(scmi_id); -static DEFINE_IDR(scmi_protocols); -static DEFINE_SPINLOCK(protocol_lock); +static DEFINE_XARRAY(scmi_protocols); /* List of all SCMI devices active in system */ static LIST_HEAD(scmi_list); @@ -194,11 +194,94 @@ struct scmi_info { #define bus_nb_to_scmi_info(nb) container_of(nb, struct scmi_info, bus_nb) #define req_nb_to_scmi_info(nb) container_of(nb, struct scmi_info, dev_req_nb) -static const struct scmi_protocol *scmi_protocol_get(int protocol_id) +static unsigned long +scmi_vendor_protocol_signature(unsigned int protocol_id, char *vendor_id, + char *sub_vendor_id, u32 impl_ver) { - const struct scmi_protocol *proto; + char *signature, *p; + unsigned long hash = 0; - proto = idr_find(&scmi_protocols, protocol_id); + /* vendor_id/sub_vendor_id guaranteed <= SCMI_SHORT_NAME_MAX_SIZE */ + signature = kasprintf(GFP_KERNEL, "%02X|%s|%s|0x%08X", protocol_id, + vendor_id ?: "", sub_vendor_id ?: "", impl_ver); + if (!signature) + return 0; + + p = signature; + while (*p) + hash = partial_name_hash(tolower(*p++), hash); + hash = end_name_hash(hash); + + kfree(signature); + + return hash; +} + +static unsigned long +scmi_protocol_key_calculate(int protocol_id, char *vendor_id, + char *sub_vendor_id, u32 impl_ver) +{ + if (protocol_id < SCMI_PROTOCOL_VENDOR_BASE) + return protocol_id; + else + return scmi_vendor_protocol_signature(protocol_id, vendor_id, + sub_vendor_id, impl_ver); +} + +static const struct scmi_protocol * +__scmi_vendor_protocol_lookup(int protocol_id, char *vendor_id, + char *sub_vendor_id, u32 impl_ver) +{ + unsigned long key; + struct scmi_protocol *proto = NULL; + + key = scmi_protocol_key_calculate(protocol_id, vendor_id, + sub_vendor_id, impl_ver); + if (key) + proto = xa_load(&scmi_protocols, key); + + return proto; +} + +static const struct scmi_protocol * +scmi_vendor_protocol_lookup(int protocol_id, char *vendor_id, + char *sub_vendor_id, u32 impl_ver) +{ + const struct scmi_protocol *proto = NULL; + + /* Searching for closest match ...*/ + proto = __scmi_vendor_protocol_lookup(protocol_id, vendor_id, + sub_vendor_id, impl_ver); + if (proto) + return proto; + + /* Any match just on vendor/sub_vendor ? */ + if (impl_ver) { + proto = __scmi_vendor_protocol_lookup(protocol_id, vendor_id, + sub_vendor_id, 0); + if (proto) + return proto; + } + + /* Any match just on the vendor ? */ + if (sub_vendor_id) + proto = __scmi_vendor_protocol_lookup(protocol_id, vendor_id, + NULL, 0); + return proto; +} + +static const struct scmi_protocol * +scmi_protocol_get(int protocol_id, struct scmi_revision_info *version) +{ + const struct scmi_protocol *proto = NULL; + + if (protocol_id < SCMI_PROTOCOL_VENDOR_BASE) + proto = xa_load(&scmi_protocols, protocol_id); + else + proto = scmi_vendor_protocol_lookup(protocol_id, + version->vendor_id, + version->sub_vendor_id, + version->impl_ver); if (!proto || !try_module_get(proto->owner)) { pr_warn("SCMI Protocol 0x%x not found!\n", protocol_id); return NULL; @@ -206,21 +289,46 @@ static const struct scmi_protocol *scmi_protocol_get(int protocol_id) pr_debug("Found SCMI Protocol 0x%x\n", protocol_id); + if (protocol_id >= SCMI_PROTOCOL_VENDOR_BASE) + pr_info("Loaded SCMI Vendor Protocol 0x%x - %s %s %X\n", + protocol_id, proto->vendor_id ?: "", + proto->sub_vendor_id ?: "", proto->impl_ver); + return proto; } -static void scmi_protocol_put(int protocol_id) +static void scmi_protocol_put(const struct scmi_protocol *proto) { - const struct scmi_protocol *proto; - - proto = idr_find(&scmi_protocols, protocol_id); if (proto) module_put(proto->owner); } +static int scmi_vendor_protocol_check(const struct scmi_protocol *proto) +{ + if (!proto->vendor_id) { + pr_err("missing vendor_id for protocol 0x%x\n", proto->id); + return -EINVAL; + } + + if (strlen(proto->vendor_id) >= SCMI_SHORT_NAME_MAX_SIZE) { + pr_err("malformed vendor_id for protocol 0x%x\n", proto->id); + return -EINVAL; + } + + if (proto->sub_vendor_id && + strlen(proto->sub_vendor_id) >= SCMI_SHORT_NAME_MAX_SIZE) { + pr_err("malformed sub_vendor_id for protocol 0x%x\n", + proto->id); + return -EINVAL; + } + + return 0; +} + int scmi_protocol_register(const struct scmi_protocol *proto) { int ret; + unsigned long key; if (!proto) { pr_err("invalid protocol\n"); @@ -232,12 +340,23 @@ int scmi_protocol_register(const struct scmi_protocol *proto) return -EINVAL; } - spin_lock(&protocol_lock); - ret = idr_alloc(&scmi_protocols, (void *)proto, - proto->id, proto->id + 1, GFP_ATOMIC); - spin_unlock(&protocol_lock); - if (ret != proto->id) { - pr_err("unable to allocate SCMI idr slot for 0x%x - err %d\n", + if (proto->id >= SCMI_PROTOCOL_VENDOR_BASE && + scmi_vendor_protocol_check(proto)) + return -EINVAL; + + /* + * Calculate a protocol key to register this protocol with the core; + * key value 0 is considered invalid. + */ + key = scmi_protocol_key_calculate(proto->id, proto->vendor_id, + proto->sub_vendor_id, + proto->impl_ver); + if (!key) + return -EINVAL; + + ret = xa_insert(&scmi_protocols, key, (void *)proto, GFP_KERNEL); + if (ret) { + pr_err("unable to allocate SCMI protocol slot for 0x%x - err %d\n", proto->id, ret); return ret; } @@ -250,9 +369,15 @@ EXPORT_SYMBOL_GPL(scmi_protocol_register); void scmi_protocol_unregister(const struct scmi_protocol *proto) { - spin_lock(&protocol_lock); - idr_remove(&scmi_protocols, proto->id); - spin_unlock(&protocol_lock); + unsigned long key; + + key = scmi_protocol_key_calculate(proto->id, proto->vendor_id, + proto->sub_vendor_id, + proto->impl_ver); + if (!key) + return; + + xa_erase(&scmi_protocols, key); pr_debug("Unregistered SCMI Protocol 0x%x\n", proto->id); } @@ -697,6 +822,45 @@ scmi_xfer_lookup_unlocked(struct scmi_xfers_info *minfo, u16 xfer_id) } /** + * scmi_bad_message_trace - A helper to trace weird messages + * + * @cinfo: A reference to the channel descriptor on which the message was + * received + * @msg_hdr: Message header to track + * @err: A specific error code used as a status value in traces. + * + * This helper can be used to trace any kind of weird, incomplete, unexpected, + * timed-out message that arrives and as such, can be traced only referring to + * the header content, since the payload is missing/unreliable. + */ +void scmi_bad_message_trace(struct scmi_chan_info *cinfo, u32 msg_hdr, + enum scmi_bad_msg err) +{ + char *tag; + struct scmi_info *info = handle_to_scmi_info(cinfo->handle); + + switch (MSG_XTRACT_TYPE(msg_hdr)) { + case MSG_TYPE_COMMAND: + tag = "!RESP"; + break; + case MSG_TYPE_DELAYED_RESP: + tag = "!DLYD"; + break; + case MSG_TYPE_NOTIFICATION: + tag = "!NOTI"; + break; + default: + tag = "!UNKN"; + break; + } + + trace_scmi_msg_dump(info->id, cinfo->id, + MSG_XTRACT_PROT_ID(msg_hdr), + MSG_XTRACT_ID(msg_hdr), tag, + MSG_XTRACT_TOKEN(msg_hdr), err, NULL, 0); +} + +/** * scmi_msg_response_validate - Validate message type against state of related * xfer * @@ -822,6 +986,9 @@ scmi_xfer_command_acquire(struct scmi_chan_info *cinfo, u32 msg_hdr) "Message for %d type %d is not expected!\n", xfer_id, msg_type); spin_unlock_irqrestore(&minfo->xfer_lock, flags); + + scmi_bad_message_trace(cinfo, msg_hdr, MSG_UNEXPECTED); + return xfer; } refcount_inc(&xfer->users); @@ -846,6 +1013,9 @@ scmi_xfer_command_acquire(struct scmi_chan_info *cinfo, u32 msg_hdr) dev_err(cinfo->dev, "Invalid message type:%d for %d - HDR:0x%X state:%d\n", msg_type, xfer_id, msg_hdr, xfer->state); + + scmi_bad_message_trace(cinfo, msg_hdr, MSG_INVALID); + /* On error the refcount incremented above has to be dropped */ __scmi_xfer_put(minfo, xfer); xfer = ERR_PTR(-EINVAL); @@ -882,6 +1052,9 @@ static void scmi_handle_notification(struct scmi_chan_info *cinfo, if (IS_ERR(xfer)) { dev_err(dev, "failed to get free message slot (%ld)\n", PTR_ERR(xfer)); + + scmi_bad_message_trace(cinfo, msg_hdr, MSG_NOMEM); + scmi_clear_channel(info, cinfo); return; } @@ -1001,6 +1174,7 @@ void scmi_rx_callback(struct scmi_chan_info *cinfo, u32 msg_hdr, void *priv) break; default: WARN_ONCE(1, "received unknown msg_type:%d\n", msg_type); + scmi_bad_message_trace(cinfo, msg_hdr, MSG_UNKNOWN); break; } } @@ -1489,6 +1663,20 @@ out: } /** + * scmi_common_get_max_msg_size - Get maximum message size + * @ph: A protocol handle reference. + * + * Return: Maximum message size for the current protocol. + */ +static int scmi_common_get_max_msg_size(const struct scmi_protocol_handle *ph) +{ + const struct scmi_protocol_instance *pi = ph_to_pi(ph); + struct scmi_info *info = handle_to_scmi_info(pi->handle); + + return info->desc->max_msg_size; +} + +/** * struct scmi_iterator - Iterator descriptor * @msg: A reference to the message TX buffer; filled by @prepare_message with * a proper custom command payload for each multi-part command request. @@ -1799,6 +1987,7 @@ static int scmi_protocol_msg_check(const struct scmi_protocol_handle *ph, static const struct scmi_proto_helpers_ops helpers_ops = { .extended_name_get = scmi_common_extended_name_get, + .get_max_msg_size = scmi_common_get_max_msg_size, .iter_response_init = scmi_iterator_init, .iter_response_run = scmi_iterator_run, .protocol_msg_check = scmi_protocol_msg_check, @@ -1891,7 +2080,7 @@ scmi_alloc_init_protocol_instance(struct scmi_info *info, /* Protocol specific devres group */ gid = devres_open_group(handle->dev, NULL, GFP_KERNEL); if (!gid) { - scmi_protocol_put(proto->id); + scmi_protocol_put(proto); goto out; } @@ -1955,7 +2144,7 @@ scmi_alloc_init_protocol_instance(struct scmi_info *info, clean: /* Take care to put the protocol module's owner before releasing all */ - scmi_protocol_put(proto->id); + scmi_protocol_put(proto); devres_release_group(handle->dev, gid); out: return ERR_PTR(ret); @@ -1989,7 +2178,7 @@ scmi_get_protocol_instance(const struct scmi_handle *handle, u8 protocol_id) const struct scmi_protocol *proto; /* Fails if protocol not registered on bus */ - proto = scmi_protocol_get(protocol_id); + proto = scmi_protocol_get(protocol_id, &info->version); if (proto) pi = scmi_alloc_init_protocol_instance(info, proto); else @@ -2044,7 +2233,7 @@ void scmi_protocol_release(const struct scmi_handle *handle, u8 protocol_id) idr_remove(&info->protocols, protocol_id); - scmi_protocol_put(protocol_id); + scmi_protocol_put(pi->proto); devres_release_group(handle->dev, gid); dev_dbg(handle->dev, "De-Initialized protocol: 0x%X\n", @@ -2491,6 +2680,10 @@ scmi_txrx_setup(struct scmi_info *info, struct device_node *of_node, ret = 0; } + if (ret) + dev_err(info->dev, + "failed to setup channel for protocol:0x%X\n", prot_id); + return ret; } @@ -2760,6 +2953,7 @@ static int scmi_debugfs_raw_mode_setup(struct scmi_info *info) static int scmi_probe(struct platform_device *pdev) { int ret; + char *err_str = "probe failure\n"; struct scmi_handle *handle; const struct scmi_desc *desc; struct scmi_info *info; @@ -2810,27 +3004,37 @@ static int scmi_probe(struct platform_device *pdev) if (desc->ops->link_supplier) { ret = desc->ops->link_supplier(dev); - if (ret) + if (ret) { + err_str = "transport not ready\n"; goto clear_ida; + } } /* Setup all channels described in the DT at first */ ret = scmi_channels_setup(info); - if (ret) + if (ret) { + err_str = "failed to setup channels\n"; goto clear_ida; + } ret = bus_register_notifier(&scmi_bus_type, &info->bus_nb); - if (ret) + if (ret) { + err_str = "failed to register bus notifier\n"; goto clear_txrx_setup; + } ret = blocking_notifier_chain_register(&scmi_requested_devices_nh, &info->dev_req_nb); - if (ret) + if (ret) { + err_str = "failed to register device notifier\n"; goto clear_bus_notifier; + } ret = scmi_xfer_info_init(info); - if (ret) + if (ret) { + err_str = "failed to init xfers pool\n"; goto clear_dev_req_notifier; + } if (scmi_top_dentry) { info->dbg = scmi_debugfs_common_setup(info); @@ -2867,9 +3071,11 @@ static int scmi_probe(struct platform_device *pdev) */ ret = scmi_protocol_acquire(handle, SCMI_PROTOCOL_BASE); if (ret) { - dev_err(dev, "unable to communicate with SCMI\n"); - if (coex) + err_str = "unable to communicate with SCMI\n"; + if (coex) { + dev_err(dev, "%s", err_str); return 0; + } goto notification_exit; } @@ -2923,7 +3129,8 @@ clear_txrx_setup: scmi_cleanup_txrx_channels(info); clear_ida: ida_free(&scmi_id, info->id); - return ret; + + return dev_err_probe(dev, ret, "%s", err_str); } static void scmi_remove(struct platform_device *pdev) @@ -3127,6 +3334,7 @@ static int __init scmi_driver_init(void) scmi_voltage_register(); scmi_system_register(); scmi_powercap_register(); + scmi_pinctrl_register(); return platform_driver_register(&scmi_driver); } @@ -3144,6 +3352,7 @@ static void __exit scmi_driver_exit(void) scmi_voltage_unregister(); scmi_system_unregister(); scmi_powercap_unregister(); + scmi_pinctrl_unregister(); scmi_transports_exit(); diff --git a/drivers/firmware/arm_scmi/mailbox.c b/drivers/firmware/arm_scmi/mailbox.c index b8d470417e8f..615a3b2ad83d 100644 --- a/drivers/firmware/arm_scmi/mailbox.c +++ b/drivers/firmware/arm_scmi/mailbox.c @@ -56,6 +56,9 @@ static void rx_callback(struct mbox_client *cl, void *m) */ if (cl->knows_txdone && !shmem_channel_free(smbox->shmem)) { dev_warn(smbox->cinfo->dev, "Ignoring spurious A2P IRQ !\n"); + scmi_bad_message_trace(smbox->cinfo, + shmem_read_header(smbox->shmem), + MSG_MBOX_SPURIOUS); return; } diff --git a/drivers/firmware/arm_scmi/notify.c b/drivers/firmware/arm_scmi/notify.c index 27c52531194d..e160ecb22948 100644 --- a/drivers/firmware/arm_scmi/notify.c +++ b/drivers/firmware/arm_scmi/notify.c @@ -1513,17 +1513,12 @@ static int scmi_devm_notifier_register(struct scmi_device *sdev, static int scmi_devm_notifier_match(struct device *dev, void *res, void *data) { struct scmi_notifier_devres *dres = res; - struct scmi_notifier_devres *xres = data; + struct notifier_block *nb = data; - if (WARN_ON(!dres || !xres)) + if (WARN_ON(!dres || !nb)) return 0; - return dres->proto_id == xres->proto_id && - dres->evt_id == xres->evt_id && - dres->nb == xres->nb && - ((!dres->src_id && !xres->src_id) || - (dres->src_id && xres->src_id && - dres->__src_id == xres->__src_id)); + return dres->nb == nb; } /** @@ -1531,10 +1526,6 @@ static int scmi_devm_notifier_match(struct device *dev, void *res, void *data) * notifier_block for an event * @sdev: A reference to an scmi_device whose embedded struct device is to * be used for devres accounting. - * @proto_id: Protocol ID - * @evt_id: Event ID - * @src_id: Source ID, when NULL register for events coming form ALL possible - * sources * @nb: A standard notifier block to register for the specified event * * Generic devres managed helper to explicitly un-register a notifier_block @@ -1544,25 +1535,12 @@ static int scmi_devm_notifier_match(struct device *dev, void *res, void *data) * Return: 0 on Success */ static int scmi_devm_notifier_unregister(struct scmi_device *sdev, - u8 proto_id, u8 evt_id, - const u32 *src_id, struct notifier_block *nb) { int ret; - struct scmi_notifier_devres dres; - - dres.handle = sdev->handle; - dres.proto_id = proto_id; - dres.evt_id = evt_id; - if (src_id) { - dres.__src_id = *src_id; - dres.src_id = &dres.__src_id; - } else { - dres.src_id = NULL; - } ret = devres_release(&sdev->dev, scmi_devm_release_notifier, - scmi_devm_notifier_match, &dres); + scmi_devm_notifier_match, nb); WARN_ON(ret); diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c index 345fff167b52..4b7f1cbb9b04 100644 --- a/drivers/firmware/arm_scmi/perf.c +++ b/drivers/firmware/arm_scmi/perf.c @@ -387,8 +387,8 @@ process_response_opp(struct device *dev, struct perf_dom_info *dom, ret = xa_insert(&dom->opps_by_lvl, opp->perf, opp, GFP_KERNEL); if (ret) - dev_warn(dev, "Failed to add opps_by_lvl at %d - ret:%d\n", - opp->perf, ret); + dev_warn(dev, "Failed to add opps_by_lvl at %d for %s - ret:%d\n", + opp->perf, dom->info.name, ret); } static inline void @@ -405,8 +405,8 @@ process_response_opp_v4(struct device *dev, struct perf_dom_info *dom, ret = xa_insert(&dom->opps_by_lvl, opp->perf, opp, GFP_KERNEL); if (ret) - dev_warn(dev, "Failed to add opps_by_lvl at %d - ret:%d\n", - opp->perf, ret); + dev_warn(dev, "Failed to add opps_by_lvl at %d for %s - ret:%d\n", + opp->perf, dom->info.name, ret); /* Note that PERF v4 reports always five 32-bit words */ opp->indicative_freq = le32_to_cpu(r->opp[loop_idx].indicative_freq); @@ -417,8 +417,8 @@ process_response_opp_v4(struct device *dev, struct perf_dom_info *dom, GFP_KERNEL); if (ret) dev_warn(dev, - "Failed to add opps_by_idx at %d - ret:%d\n", - opp->level_index, ret); + "Failed to add opps_by_idx at %d for %s - ret:%d\n", + opp->level_index, dom->info.name, ret); hash_add(dom->opps_by_freq, &opp->hash, opp->indicative_freq); } @@ -879,7 +879,8 @@ static int scmi_dvfs_device_opps_add(const struct scmi_protocol_handle *ph, ret = dev_pm_opp_add_dynamic(dev, &data); if (ret) { - dev_warn(dev, "failed to add opp %luHz\n", freq); + dev_warn(dev, "[%d][%s]: Failed to add OPP[%d] %lu\n", + domain, dom->info.name, idx, freq); dev_pm_opp_remove_all_dynamic(dev); return ret; } diff --git a/drivers/firmware/arm_scmi/pinctrl.c b/drivers/firmware/arm_scmi/pinctrl.c new file mode 100644 index 000000000000..a2a7f880d6a3 --- /dev/null +++ b/drivers/firmware/arm_scmi/pinctrl.c @@ -0,0 +1,916 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * System Control and Management Interface (SCMI) Pinctrl Protocol + * + * Copyright (C) 2024 EPAM + * Copyright 2024 NXP + */ + +#include <asm/byteorder.h> +#include <linux/bits.h> +#include <linux/bitfield.h> +#include <linux/device.h> +#include <linux/module.h> +#include <linux/scmi_protocol.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/types.h> + +#include "common.h" +#include "protocols.h" + +/* Updated only after ALL the mandatory features for that version are merged */ +#define SCMI_PROTOCOL_SUPPORTED_VERSION 0x10000 + +#define GET_GROUPS_NR(x) le32_get_bits((x), GENMASK(31, 16)) +#define GET_PINS_NR(x) le32_get_bits((x), GENMASK(15, 0)) +#define GET_FUNCTIONS_NR(x) le32_get_bits((x), GENMASK(15, 0)) + +#define EXT_NAME_FLAG(x) le32_get_bits((x), BIT(31)) +#define NUM_ELEMS(x) le32_get_bits((x), GENMASK(15, 0)) + +#define REMAINING(x) le32_get_bits((x), GENMASK(31, 16)) +#define RETURNED(x) le32_get_bits((x), GENMASK(11, 0)) + +#define CONFIG_FLAG_MASK GENMASK(19, 18) +#define SELECTOR_MASK GENMASK(17, 16) +#define SKIP_CONFIGS_MASK GENMASK(15, 8) +#define CONFIG_TYPE_MASK GENMASK(7, 0) + +enum scmi_pinctrl_protocol_cmd { + PINCTRL_ATTRIBUTES = 0x3, + PINCTRL_LIST_ASSOCIATIONS = 0x4, + PINCTRL_SETTINGS_GET = 0x5, + PINCTRL_SETTINGS_CONFIGURE = 0x6, + PINCTRL_REQUEST = 0x7, + PINCTRL_RELEASE = 0x8, + PINCTRL_NAME_GET = 0x9, + PINCTRL_SET_PERMISSIONS = 0xa, +}; + +struct scmi_msg_settings_conf { + __le32 identifier; + __le32 function_id; + __le32 attributes; + __le32 configs[]; +}; + +struct scmi_msg_settings_get { + __le32 identifier; + __le32 attributes; +}; + +struct scmi_resp_settings_get { + __le32 function_selected; + __le32 num_configs; + __le32 configs[]; +}; + +struct scmi_msg_pinctrl_protocol_attributes { + __le32 attributes_low; + __le32 attributes_high; +}; + +struct scmi_msg_pinctrl_attributes { + __le32 identifier; + __le32 flags; +}; + +struct scmi_resp_pinctrl_attributes { + __le32 attributes; + u8 name[SCMI_SHORT_NAME_MAX_SIZE]; +}; + +struct scmi_msg_pinctrl_list_assoc { + __le32 identifier; + __le32 flags; + __le32 index; +}; + +struct scmi_resp_pinctrl_list_assoc { + __le32 flags; + __le16 array[]; +}; + +struct scmi_msg_request { + __le32 identifier; + __le32 flags; +}; + +struct scmi_group_info { + char name[SCMI_MAX_STR_SIZE]; + bool present; + u32 *group_pins; + u32 nr_pins; +}; + +struct scmi_function_info { + char name[SCMI_MAX_STR_SIZE]; + bool present; + u32 *groups; + u32 nr_groups; +}; + +struct scmi_pin_info { + char name[SCMI_MAX_STR_SIZE]; + bool present; +}; + +struct scmi_pinctrl_info { + u32 version; + int nr_groups; + int nr_functions; + int nr_pins; + struct scmi_group_info *groups; + struct scmi_function_info *functions; + struct scmi_pin_info *pins; +}; + +static int scmi_pinctrl_attributes_get(const struct scmi_protocol_handle *ph, + struct scmi_pinctrl_info *pi) +{ + int ret; + struct scmi_xfer *t; + struct scmi_msg_pinctrl_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_functions = GET_FUNCTIONS_NR(attr->attributes_high); + pi->nr_groups = GET_GROUPS_NR(attr->attributes_low); + pi->nr_pins = GET_PINS_NR(attr->attributes_low); + if (pi->nr_pins == 0) { + dev_warn(ph->dev, "returned zero pins\n"); + ret = -EINVAL; + } + } + + ph->xops->xfer_put(ph, t); + return ret; +} + +static int scmi_pinctrl_count_get(const struct scmi_protocol_handle *ph, + enum scmi_pinctrl_selector_type type) +{ + struct scmi_pinctrl_info *pi = ph->get_priv(ph); + + switch (type) { + case PIN_TYPE: + return pi->nr_pins; + case GROUP_TYPE: + return pi->nr_groups; + case FUNCTION_TYPE: + return pi->nr_functions; + default: + return -EINVAL; + } +} + +static int scmi_pinctrl_validate_id(const struct scmi_protocol_handle *ph, + u32 selector, + enum scmi_pinctrl_selector_type type) +{ + int value; + + value = scmi_pinctrl_count_get(ph, type); + if (value < 0) + return value; + + if (selector >= value || value == 0) + return -EINVAL; + + return 0; +} + +static int scmi_pinctrl_attributes(const struct scmi_protocol_handle *ph, + enum scmi_pinctrl_selector_type type, + u32 selector, char *name, + u32 *n_elems) +{ + int ret; + struct scmi_xfer *t; + struct scmi_msg_pinctrl_attributes *tx; + struct scmi_resp_pinctrl_attributes *rx; + bool ext_name_flag; + + if (!name) + return -EINVAL; + + ret = scmi_pinctrl_validate_id(ph, selector, type); + if (ret) + return ret; + + ret = ph->xops->xfer_get_init(ph, PINCTRL_ATTRIBUTES, sizeof(*tx), + sizeof(*rx), &t); + if (ret) + return ret; + + tx = t->tx.buf; + rx = t->rx.buf; + tx->identifier = cpu_to_le32(selector); + tx->flags = cpu_to_le32(type); + + ret = ph->xops->do_xfer(ph, t); + if (!ret) { + if (n_elems) + *n_elems = NUM_ELEMS(rx->attributes); + + strscpy(name, rx->name, SCMI_SHORT_NAME_MAX_SIZE); + + ext_name_flag = !!EXT_NAME_FLAG(rx->attributes); + } + + ph->xops->xfer_put(ph, t); + + if (ret) + return ret; + /* + * If supported overwrite short name with the extended one; + * on error just carry on and use already provided short name. + */ + if (ext_name_flag) + ret = ph->hops->extended_name_get(ph, PINCTRL_NAME_GET, + selector, (u32 *)&type, name, + SCMI_MAX_STR_SIZE); + return ret; +} + +struct scmi_pinctrl_ipriv { + u32 selector; + enum scmi_pinctrl_selector_type type; + u32 *array; +}; + +static void iter_pinctrl_assoc_prepare_message(void *message, + u32 desc_index, + const void *priv) +{ + struct scmi_msg_pinctrl_list_assoc *msg = message; + const struct scmi_pinctrl_ipriv *p = priv; + + msg->identifier = cpu_to_le32(p->selector); + msg->flags = cpu_to_le32(p->type); + msg->index = cpu_to_le32(desc_index); +} + +static int iter_pinctrl_assoc_update_state(struct scmi_iterator_state *st, + const void *response, void *priv) +{ + const struct scmi_resp_pinctrl_list_assoc *r = response; + + st->num_returned = RETURNED(r->flags); + st->num_remaining = REMAINING(r->flags); + + return 0; +} + +static int +iter_pinctrl_assoc_process_response(const struct scmi_protocol_handle *ph, + const void *response, + struct scmi_iterator_state *st, void *priv) +{ + const struct scmi_resp_pinctrl_list_assoc *r = response; + struct scmi_pinctrl_ipriv *p = priv; + + p->array[st->desc_index + st->loop_idx] = + le16_to_cpu(r->array[st->loop_idx]); + + return 0; +} + +static int scmi_pinctrl_list_associations(const struct scmi_protocol_handle *ph, + u32 selector, + enum scmi_pinctrl_selector_type type, + u16 size, u32 *array) +{ + int ret; + void *iter; + struct scmi_iterator_ops ops = { + .prepare_message = iter_pinctrl_assoc_prepare_message, + .update_state = iter_pinctrl_assoc_update_state, + .process_response = iter_pinctrl_assoc_process_response, + }; + struct scmi_pinctrl_ipriv ipriv = { + .selector = selector, + .type = type, + .array = array, + }; + + if (!array || !size || type == PIN_TYPE) + return -EINVAL; + + ret = scmi_pinctrl_validate_id(ph, selector, type); + if (ret) + return ret; + + iter = ph->hops->iter_response_init(ph, &ops, size, + PINCTRL_LIST_ASSOCIATIONS, + sizeof(struct scmi_msg_pinctrl_list_assoc), + &ipriv); + if (IS_ERR(iter)) + return PTR_ERR(iter); + + return ph->hops->iter_response_run(iter); +} + +struct scmi_settings_get_ipriv { + u32 selector; + enum scmi_pinctrl_selector_type type; + bool get_all; + unsigned int *nr_configs; + enum scmi_pinctrl_conf_type *config_types; + u32 *config_values; +}; + +static void +iter_pinctrl_settings_get_prepare_message(void *message, u32 desc_index, + const void *priv) +{ + struct scmi_msg_settings_get *msg = message; + const struct scmi_settings_get_ipriv *p = priv; + u32 attributes; + + attributes = FIELD_PREP(SELECTOR_MASK, p->type); + + if (p->get_all) { + attributes |= FIELD_PREP(CONFIG_FLAG_MASK, 1) | + FIELD_PREP(SKIP_CONFIGS_MASK, desc_index); + } else { + attributes |= FIELD_PREP(CONFIG_TYPE_MASK, p->config_types[0]); + } + + msg->attributes = cpu_to_le32(attributes); + msg->identifier = cpu_to_le32(p->selector); +} + +static int +iter_pinctrl_settings_get_update_state(struct scmi_iterator_state *st, + const void *response, void *priv) +{ + const struct scmi_resp_settings_get *r = response; + struct scmi_settings_get_ipriv *p = priv; + + if (p->get_all) { + st->num_returned = le32_get_bits(r->num_configs, GENMASK(7, 0)); + st->num_remaining = le32_get_bits(r->num_configs, GENMASK(31, 24)); + } else { + st->num_returned = 1; + st->num_remaining = 0; + } + + return 0; +} + +static int +iter_pinctrl_settings_get_process_response(const struct scmi_protocol_handle *ph, + const void *response, + struct scmi_iterator_state *st, + void *priv) +{ + const struct scmi_resp_settings_get *r = response; + struct scmi_settings_get_ipriv *p = priv; + u32 type = le32_get_bits(r->configs[st->loop_idx * 2], GENMASK(7, 0)); + u32 val = le32_to_cpu(r->configs[st->loop_idx * 2 + 1]); + + if (p->get_all) { + p->config_types[st->desc_index + st->loop_idx] = type; + } else { + if (p->config_types[0] != type) + return -EINVAL; + } + + p->config_values[st->desc_index + st->loop_idx] = val; + ++*p->nr_configs; + + return 0; +} + +static int +scmi_pinctrl_settings_get(const struct scmi_protocol_handle *ph, u32 selector, + enum scmi_pinctrl_selector_type type, + unsigned int *nr_configs, + enum scmi_pinctrl_conf_type *config_types, + u32 *config_values) +{ + int ret; + void *iter; + unsigned int max_configs = *nr_configs; + struct scmi_iterator_ops ops = { + .prepare_message = iter_pinctrl_settings_get_prepare_message, + .update_state = iter_pinctrl_settings_get_update_state, + .process_response = iter_pinctrl_settings_get_process_response, + }; + struct scmi_settings_get_ipriv ipriv = { + .selector = selector, + .type = type, + .get_all = (max_configs > 1), + .nr_configs = nr_configs, + .config_types = config_types, + .config_values = config_values, + }; + + if (!config_types || !config_values || type == FUNCTION_TYPE) + return -EINVAL; + + ret = scmi_pinctrl_validate_id(ph, selector, type); + if (ret) + return ret; + + /* Prepare to count returned configs */ + *nr_configs = 0; + iter = ph->hops->iter_response_init(ph, &ops, max_configs, + PINCTRL_SETTINGS_GET, + sizeof(struct scmi_msg_settings_get), + &ipriv); + if (IS_ERR(iter)) + return PTR_ERR(iter); + + return ph->hops->iter_response_run(iter); +} + +static int scmi_pinctrl_settings_get_one(const struct scmi_protocol_handle *ph, + u32 selector, + enum scmi_pinctrl_selector_type type, + enum scmi_pinctrl_conf_type config_type, + u32 *config_value) +{ + unsigned int nr_configs = 1; + + return scmi_pinctrl_settings_get(ph, selector, type, &nr_configs, + &config_type, config_value); +} + +static int scmi_pinctrl_settings_get_all(const struct scmi_protocol_handle *ph, + u32 selector, + enum scmi_pinctrl_selector_type type, + unsigned int *nr_configs, + enum scmi_pinctrl_conf_type *config_types, + u32 *config_values) +{ + if (!nr_configs || *nr_configs == 0) + return -EINVAL; + + return scmi_pinctrl_settings_get(ph, selector, type, nr_configs, + config_types, config_values); +} + +static int +scmi_pinctrl_settings_conf(const struct scmi_protocol_handle *ph, + u32 selector, + enum scmi_pinctrl_selector_type type, + u32 nr_configs, + enum scmi_pinctrl_conf_type *config_type, + u32 *config_value) +{ + struct scmi_xfer *t; + struct scmi_msg_settings_conf *tx; + u32 attributes; + int ret, i; + u32 configs_in_chunk, conf_num = 0; + u32 chunk; + int max_msg_size = ph->hops->get_max_msg_size(ph); + + if (!config_type || !config_value || type == FUNCTION_TYPE) + return -EINVAL; + + ret = scmi_pinctrl_validate_id(ph, selector, type); + if (ret) + return ret; + + configs_in_chunk = (max_msg_size - sizeof(*tx)) / (sizeof(__le32) * 2); + while (conf_num < nr_configs) { + chunk = (nr_configs - conf_num > configs_in_chunk) ? + configs_in_chunk : nr_configs - conf_num; + + ret = ph->xops->xfer_get_init(ph, PINCTRL_SETTINGS_CONFIGURE, + sizeof(*tx) + + chunk * 2 * sizeof(__le32), 0, &t); + if (ret) + break; + + tx = t->tx.buf; + tx->identifier = cpu_to_le32(selector); + tx->function_id = cpu_to_le32(0xFFFFFFFF); + attributes = FIELD_PREP(GENMASK(1, 0), type) | + FIELD_PREP(GENMASK(9, 2), chunk); + tx->attributes = cpu_to_le32(attributes); + + for (i = 0; i < chunk; i++) { + tx->configs[i * 2] = + cpu_to_le32(config_type[conf_num + i]); + tx->configs[i * 2 + 1] = + cpu_to_le32(config_value[conf_num + i]); + } + + ret = ph->xops->do_xfer(ph, t); + + ph->xops->xfer_put(ph, t); + + if (ret) + break; + + conf_num += chunk; + } + + return ret; +} + +static int scmi_pinctrl_function_select(const struct scmi_protocol_handle *ph, + u32 group, + enum scmi_pinctrl_selector_type type, + u32 function_id) +{ + int ret; + struct scmi_xfer *t; + struct scmi_msg_settings_conf *tx; + u32 attributes; + + ret = scmi_pinctrl_validate_id(ph, group, type); + if (ret) + return ret; + + ret = ph->xops->xfer_get_init(ph, PINCTRL_SETTINGS_CONFIGURE, + sizeof(*tx), 0, &t); + if (ret) + return ret; + + tx = t->tx.buf; + tx->identifier = cpu_to_le32(group); + tx->function_id = cpu_to_le32(function_id); + attributes = FIELD_PREP(GENMASK(1, 0), type) | BIT(10); + tx->attributes = cpu_to_le32(attributes); + + ret = ph->xops->do_xfer(ph, t); + ph->xops->xfer_put(ph, t); + + return ret; +} + +static int scmi_pinctrl_request_free(const struct scmi_protocol_handle *ph, + u32 identifier, + enum scmi_pinctrl_selector_type type, + enum scmi_pinctrl_protocol_cmd cmd) +{ + int ret; + struct scmi_xfer *t; + struct scmi_msg_request *tx; + + if (type == FUNCTION_TYPE) + return -EINVAL; + + if (cmd != PINCTRL_REQUEST && cmd != PINCTRL_RELEASE) + return -EINVAL; + + ret = scmi_pinctrl_validate_id(ph, identifier, type); + if (ret) + return ret; + + ret = ph->xops->xfer_get_init(ph, cmd, sizeof(*tx), 0, &t); + if (ret) + return ret; + + tx = t->tx.buf; + tx->identifier = cpu_to_le32(identifier); + tx->flags = cpu_to_le32(type); + + ret = ph->xops->do_xfer(ph, t); + ph->xops->xfer_put(ph, t); + + return ret; +} + +static int scmi_pinctrl_pin_request(const struct scmi_protocol_handle *ph, + u32 pin) +{ + return scmi_pinctrl_request_free(ph, pin, PIN_TYPE, PINCTRL_REQUEST); +} + +static int scmi_pinctrl_pin_free(const struct scmi_protocol_handle *ph, u32 pin) +{ + return scmi_pinctrl_request_free(ph, pin, PIN_TYPE, PINCTRL_RELEASE); +} + +static int scmi_pinctrl_get_group_info(const struct scmi_protocol_handle *ph, + u32 selector, + struct scmi_group_info *group) +{ + int ret; + + ret = scmi_pinctrl_attributes(ph, GROUP_TYPE, selector, group->name, + &group->nr_pins); + if (ret) + return ret; + + if (!group->nr_pins) { + dev_err(ph->dev, "Group %d has 0 elements", selector); + return -ENODATA; + } + + group->group_pins = kmalloc_array(group->nr_pins, + sizeof(*group->group_pins), + GFP_KERNEL); + if (!group->group_pins) + return -ENOMEM; + + ret = scmi_pinctrl_list_associations(ph, selector, GROUP_TYPE, + group->nr_pins, group->group_pins); + if (ret) { + kfree(group->group_pins); + return ret; + } + + group->present = true; + return 0; +} + +static int scmi_pinctrl_get_group_name(const struct scmi_protocol_handle *ph, + u32 selector, const char **name) +{ + struct scmi_pinctrl_info *pi = ph->get_priv(ph); + + if (!name) + return -EINVAL; + + if (selector >= pi->nr_groups || pi->nr_groups == 0) + return -EINVAL; + + if (!pi->groups[selector].present) { + int ret; + + ret = scmi_pinctrl_get_group_info(ph, selector, + &pi->groups[selector]); + if (ret) + return ret; + } + + *name = pi->groups[selector].name; + + return 0; +} + +static int scmi_pinctrl_group_pins_get(const struct scmi_protocol_handle *ph, + u32 selector, const u32 **pins, + u32 *nr_pins) +{ + struct scmi_pinctrl_info *pi = ph->get_priv(ph); + + if (!pins || !nr_pins) + return -EINVAL; + + if (selector >= pi->nr_groups || pi->nr_groups == 0) + return -EINVAL; + + if (!pi->groups[selector].present) { + int ret; + + ret = scmi_pinctrl_get_group_info(ph, selector, + &pi->groups[selector]); + if (ret) + return ret; + } + + *pins = pi->groups[selector].group_pins; + *nr_pins = pi->groups[selector].nr_pins; + + return 0; +} + +static int scmi_pinctrl_get_function_info(const struct scmi_protocol_handle *ph, + u32 selector, + struct scmi_function_info *func) +{ + int ret; + + ret = scmi_pinctrl_attributes(ph, FUNCTION_TYPE, selector, func->name, + &func->nr_groups); + if (ret) + return ret; + + if (!func->nr_groups) { + dev_err(ph->dev, "Function %d has 0 elements", selector); + return -ENODATA; + } + + func->groups = kmalloc_array(func->nr_groups, sizeof(*func->groups), + GFP_KERNEL); + if (!func->groups) + return -ENOMEM; + + ret = scmi_pinctrl_list_associations(ph, selector, FUNCTION_TYPE, + func->nr_groups, func->groups); + if (ret) { + kfree(func->groups); + return ret; + } + + func->present = true; + return 0; +} + +static int scmi_pinctrl_get_function_name(const struct scmi_protocol_handle *ph, + u32 selector, const char **name) +{ + struct scmi_pinctrl_info *pi = ph->get_priv(ph); + + if (!name) + return -EINVAL; + + if (selector >= pi->nr_functions || pi->nr_functions == 0) + return -EINVAL; + + if (!pi->functions[selector].present) { + int ret; + + ret = scmi_pinctrl_get_function_info(ph, selector, + &pi->functions[selector]); + if (ret) + return ret; + } + + *name = pi->functions[selector].name; + return 0; +} + +static int +scmi_pinctrl_function_groups_get(const struct scmi_protocol_handle *ph, + u32 selector, u32 *nr_groups, + const u32 **groups) +{ + struct scmi_pinctrl_info *pi = ph->get_priv(ph); + + if (!groups || !nr_groups) + return -EINVAL; + + if (selector >= pi->nr_functions || pi->nr_functions == 0) + return -EINVAL; + + if (!pi->functions[selector].present) { + int ret; + + ret = scmi_pinctrl_get_function_info(ph, selector, + &pi->functions[selector]); + if (ret) + return ret; + } + + *groups = pi->functions[selector].groups; + *nr_groups = pi->functions[selector].nr_groups; + + return 0; +} + +static int scmi_pinctrl_mux_set(const struct scmi_protocol_handle *ph, + u32 selector, u32 group) +{ + return scmi_pinctrl_function_select(ph, group, GROUP_TYPE, selector); +} + +static int scmi_pinctrl_get_pin_info(const struct scmi_protocol_handle *ph, + u32 selector, struct scmi_pin_info *pin) +{ + int ret; + + if (!pin) + return -EINVAL; + + ret = scmi_pinctrl_attributes(ph, PIN_TYPE, selector, pin->name, NULL); + if (ret) + return ret; + + pin->present = true; + return 0; +} + +static int scmi_pinctrl_get_pin_name(const struct scmi_protocol_handle *ph, + u32 selector, const char **name) +{ + struct scmi_pinctrl_info *pi = ph->get_priv(ph); + + if (!name) + return -EINVAL; + + if (selector >= pi->nr_pins) + return -EINVAL; + + if (!pi->pins[selector].present) { + int ret; + + ret = scmi_pinctrl_get_pin_info(ph, selector, &pi->pins[selector]); + if (ret) + return ret; + } + + *name = pi->pins[selector].name; + + return 0; +} + +static int scmi_pinctrl_name_get(const struct scmi_protocol_handle *ph, + u32 selector, + enum scmi_pinctrl_selector_type type, + const char **name) +{ + switch (type) { + case PIN_TYPE: + return scmi_pinctrl_get_pin_name(ph, selector, name); + case GROUP_TYPE: + return scmi_pinctrl_get_group_name(ph, selector, name); + case FUNCTION_TYPE: + return scmi_pinctrl_get_function_name(ph, selector, name); + default: + return -EINVAL; + } +} + +static const struct scmi_pinctrl_proto_ops pinctrl_proto_ops = { + .count_get = scmi_pinctrl_count_get, + .name_get = scmi_pinctrl_name_get, + .group_pins_get = scmi_pinctrl_group_pins_get, + .function_groups_get = scmi_pinctrl_function_groups_get, + .mux_set = scmi_pinctrl_mux_set, + .settings_get_one = scmi_pinctrl_settings_get_one, + .settings_get_all = scmi_pinctrl_settings_get_all, + .settings_conf = scmi_pinctrl_settings_conf, + .pin_request = scmi_pinctrl_pin_request, + .pin_free = scmi_pinctrl_pin_free, +}; + +static int scmi_pinctrl_protocol_init(const struct scmi_protocol_handle *ph) +{ + int ret; + u32 version; + struct scmi_pinctrl_info *pinfo; + + ret = ph->xops->version_get(ph, &version); + if (ret) + return ret; + + dev_dbg(ph->dev, "Pinctrl Version %d.%d\n", + PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version)); + + pinfo = devm_kzalloc(ph->dev, sizeof(*pinfo), GFP_KERNEL); + if (!pinfo) + return -ENOMEM; + + ret = scmi_pinctrl_attributes_get(ph, pinfo); + if (ret) + return ret; + + pinfo->pins = devm_kcalloc(ph->dev, pinfo->nr_pins, + sizeof(*pinfo->pins), GFP_KERNEL); + if (!pinfo->pins) + return -ENOMEM; + + pinfo->groups = devm_kcalloc(ph->dev, pinfo->nr_groups, + sizeof(*pinfo->groups), GFP_KERNEL); + if (!pinfo->groups) + return -ENOMEM; + + pinfo->functions = devm_kcalloc(ph->dev, pinfo->nr_functions, + sizeof(*pinfo->functions), GFP_KERNEL); + if (!pinfo->functions) + return -ENOMEM; + + pinfo->version = version; + + return ph->set_priv(ph, pinfo, version); +} + +static int scmi_pinctrl_protocol_deinit(const struct scmi_protocol_handle *ph) +{ + int i; + struct scmi_pinctrl_info *pi = ph->get_priv(ph); + + /* Free groups_pins allocated in scmi_pinctrl_get_group_info */ + for (i = 0; i < pi->nr_groups; i++) { + if (pi->groups[i].present) { + kfree(pi->groups[i].group_pins); + pi->groups[i].present = false; + } + } + + /* Free groups allocated in scmi_pinctrl_get_function_info */ + for (i = 0; i < pi->nr_functions; i++) { + if (pi->functions[i].present) { + kfree(pi->functions[i].groups); + pi->functions[i].present = false; + } + } + + return 0; +} + +static const struct scmi_protocol scmi_pinctrl = { + .id = SCMI_PROTOCOL_PINCTRL, + .owner = THIS_MODULE, + .instance_init = &scmi_pinctrl_protocol_init, + .instance_deinit = &scmi_pinctrl_protocol_deinit, + .ops = &pinctrl_proto_ops, + .supported_version = SCMI_PROTOCOL_SUPPORTED_VERSION, +}; +DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(pinctrl, scmi_pinctrl) diff --git a/drivers/firmware/arm_scmi/protocols.h b/drivers/firmware/arm_scmi/protocols.h index 317d3fb32676..8e95f53bd7b7 100644 --- a/drivers/firmware/arm_scmi/protocols.h +++ b/drivers/firmware/arm_scmi/protocols.h @@ -29,6 +29,8 @@ #define PROTOCOL_REV_MAJOR(x) ((u16)(FIELD_GET(PROTOCOL_REV_MAJOR_MASK, (x)))) #define PROTOCOL_REV_MINOR(x) ((u16)(FIELD_GET(PROTOCOL_REV_MINOR_MASK, (x)))) +#define SCMI_PROTOCOL_VENDOR_BASE 0x80 + enum scmi_common_cmd { PROTOCOL_VERSION = 0x0, PROTOCOL_ATTRIBUTES = 0x1, @@ -258,6 +260,7 @@ struct scmi_fc_info { * @fastchannel_init: A common helper used to initialize FC descriptors by * gathering FC descriptions from the SCMI platform server. * @fastchannel_db_ring: A common helper to ring a FC doorbell. + * @get_max_msg_size: A common helper to get the maximum message size. */ struct scmi_proto_helpers_ops { int (*extended_name_get)(const struct scmi_protocol_handle *ph, @@ -277,6 +280,7 @@ struct scmi_proto_helpers_ops { struct scmi_fc_db_info **p_db, u32 *rate_limit); void (*fastchannel_db_ring)(struct scmi_fc_db_info *db); + int (*get_max_msg_size)(const struct scmi_protocol_handle *ph); }; /** @@ -323,6 +327,16 @@ typedef int (*scmi_prot_init_ph_fn_t)(const struct scmi_protocol_handle *); * protocol by the agent. Each protocol implementation * in the agent is supposed to downgrade to match the * protocol version supported by the platform. + * @vendor_id: A firmware vendor string for vendor protocols matching. + * Ignored when @id identifies a standard protocol, cannot be NULL + * otherwise. + * @sub_vendor_id: A firmware sub_vendor string for vendor protocols matching. + * Ignored if NULL or when @id identifies a standard protocol. + * @impl_ver: A firmware implementation version for vendor protocols matching. + * Ignored if zero or if @id identifies a standard protocol. + * + * Note that vendor protocols matching at load time is performed by attempting + * the closest match first against the tuple (vendor, sub_vendor, impl_ver) */ struct scmi_protocol { const u8 id; @@ -332,6 +346,9 @@ struct scmi_protocol { const void *ops; const struct scmi_protocol_events *events; unsigned int supported_version; + char *vendor_id; + char *sub_vendor_id; + u32 impl_ver; }; #define DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(name, proto) \ @@ -353,6 +370,7 @@ void __exit scmi_##name##_unregister(void) \ DECLARE_SCMI_REGISTER_UNREGISTER(base); DECLARE_SCMI_REGISTER_UNREGISTER(clock); DECLARE_SCMI_REGISTER_UNREGISTER(perf); +DECLARE_SCMI_REGISTER_UNREGISTER(pinctrl); DECLARE_SCMI_REGISTER_UNREGISTER(power); DECLARE_SCMI_REGISTER_UNREGISTER(reset); DECLARE_SCMI_REGISTER_UNREGISTER(sensors); diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index d45657aa986a..4e6f65cf0e76 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -450,6 +450,17 @@ config PINCTRL_ROCKCHIP help This support pinctrl and GPIO driver for Rockchip SoCs. +config PINCTRL_SCMI + tristate "Pinctrl driver using SCMI protocol interface" + depends on ARM_SCMI_PROTOCOL || COMPILE_TEST + select PINMUX + select GENERIC_PINCONF + help + This driver provides support for pinctrl which is controlled + by firmware that implements the SCMI interface. + It uses SCMI Message Protocol to interact with the + firmware providing all the pinctrl controls. + config PINCTRL_SINGLE tristate "One-register-per-pin type device tree based pinctrl driver" depends on OF diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 2152539b53d5..cc809669405a 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -45,6 +45,7 @@ obj-$(CONFIG_PINCTRL_PIC32) += pinctrl-pic32.o obj-$(CONFIG_PINCTRL_PISTACHIO) += pinctrl-pistachio.o obj-$(CONFIG_PINCTRL_RK805) += pinctrl-rk805.o obj-$(CONFIG_PINCTRL_ROCKCHIP) += pinctrl-rockchip.o +obj-$(CONFIG_PINCTRL_SCMI) += pinctrl-scmi.o obj-$(CONFIG_PINCTRL_SINGLE) += pinctrl-single.o obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.o obj-$(CONFIG_PINCTRL_STMFX) += pinctrl-stmfx.o diff --git a/drivers/pinctrl/pinctrl-scmi.c b/drivers/pinctrl/pinctrl-scmi.c new file mode 100644 index 000000000000..036bc1e3fc6c --- /dev/null +++ b/drivers/pinctrl/pinctrl-scmi.c @@ -0,0 +1,571 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * System Control and Power Interface (SCMI) Protocol based pinctrl driver + * + * Copyright (C) 2024 EPAM + * Copyright 2024 NXP + */ + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/scmi_protocol.h> +#include <linux/slab.h> +#include <linux/types.h> + +#include <linux/pinctrl/machine.h> +#include <linux/pinctrl/pinconf.h> +#include <linux/pinctrl/pinconf-generic.h> +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> + +#include "pinctrl-utils.h" +#include "core.h" +#include "pinconf.h" + +#define DRV_NAME "scmi-pinctrl" + +/* Define num configs, if not large than 4 use stack, else use kcalloc() */ +#define SCMI_NUM_CONFIGS 4 + +static const struct scmi_pinctrl_proto_ops *pinctrl_ops; + +struct scmi_pinctrl { + struct device *dev; + struct scmi_protocol_handle *ph; + struct pinctrl_dev *pctldev; + struct pinctrl_desc pctl_desc; + struct pinfunction *functions; + unsigned int nr_functions; + struct pinctrl_pin_desc *pins; + unsigned int nr_pins; +}; + +static int pinctrl_scmi_get_groups_count(struct pinctrl_dev *pctldev) +{ + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + return pinctrl_ops->count_get(pmx->ph, GROUP_TYPE); +} + +static const char *pinctrl_scmi_get_group_name(struct pinctrl_dev *pctldev, + unsigned int selector) +{ + int ret; + const char *name; + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + ret = pinctrl_ops->name_get(pmx->ph, selector, GROUP_TYPE, &name); + if (ret) { + dev_err(pmx->dev, "get name failed with err %d", ret); + return NULL; + } + + return name; +} + +static int pinctrl_scmi_get_group_pins(struct pinctrl_dev *pctldev, + unsigned int selector, + const unsigned int **pins, + unsigned int *num_pins) +{ + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + return pinctrl_ops->group_pins_get(pmx->ph, selector, pins, num_pins); +} + +static const struct pinctrl_ops pinctrl_scmi_pinctrl_ops = { + .get_groups_count = pinctrl_scmi_get_groups_count, + .get_group_name = pinctrl_scmi_get_group_name, + .get_group_pins = pinctrl_scmi_get_group_pins, +#ifdef CONFIG_OF + .dt_node_to_map = pinconf_generic_dt_node_to_map_all, + .dt_free_map = pinconf_generic_dt_free_map, +#endif +}; + +static int pinctrl_scmi_get_functions_count(struct pinctrl_dev *pctldev) +{ + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + return pinctrl_ops->count_get(pmx->ph, FUNCTION_TYPE); +} + +static const char *pinctrl_scmi_get_function_name(struct pinctrl_dev *pctldev, + unsigned int selector) +{ + int ret; + const char *name; + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + ret = pinctrl_ops->name_get(pmx->ph, selector, FUNCTION_TYPE, &name); + if (ret) { + dev_err(pmx->dev, "get name failed with err %d", ret); + return NULL; + } + + return name; +} + +static int pinctrl_scmi_get_function_groups(struct pinctrl_dev *pctldev, + unsigned int selector, + const char * const **p_groups, + unsigned int * const p_num_groups) +{ + struct pinfunction *func; + const unsigned int *group_ids; + unsigned int num_groups; + const char **groups; + int ret, i; + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + if (!p_groups || !p_num_groups) + return -EINVAL; + + if (selector >= pmx->nr_functions) + return -EINVAL; + + func = &pmx->functions[selector]; + if (func->ngroups) + goto done; + + ret = pinctrl_ops->function_groups_get(pmx->ph, selector, &num_groups, + &group_ids); + if (ret) { + dev_err(pmx->dev, "Unable to get function groups, err %d", ret); + return ret; + } + if (!num_groups) + return -EINVAL; + + groups = kcalloc(num_groups, sizeof(*groups), GFP_KERNEL); + if (!groups) + return -ENOMEM; + + for (i = 0; i < num_groups; i++) { + groups[i] = pinctrl_scmi_get_group_name(pctldev, group_ids[i]); + if (!groups[i]) { + ret = -EINVAL; + goto err_free; + } + } + + func->ngroups = num_groups; + func->groups = groups; +done: + *p_groups = func->groups; + *p_num_groups = func->ngroups; + + return 0; + +err_free: + kfree(groups); + + return ret; +} + +static int pinctrl_scmi_func_set_mux(struct pinctrl_dev *pctldev, + unsigned int selector, unsigned int group) +{ + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + return pinctrl_ops->mux_set(pmx->ph, selector, group); +} + +static int pinctrl_scmi_request(struct pinctrl_dev *pctldev, + unsigned int offset) +{ + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + return pinctrl_ops->pin_request(pmx->ph, offset); +} + +static int pinctrl_scmi_free(struct pinctrl_dev *pctldev, unsigned int offset) +{ + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + return pinctrl_ops->pin_free(pmx->ph, offset); +} + +static const struct pinmux_ops pinctrl_scmi_pinmux_ops = { + .request = pinctrl_scmi_request, + .free = pinctrl_scmi_free, + .get_functions_count = pinctrl_scmi_get_functions_count, + .get_function_name = pinctrl_scmi_get_function_name, + .get_function_groups = pinctrl_scmi_get_function_groups, + .set_mux = pinctrl_scmi_func_set_mux, +}; + +static int pinctrl_scmi_map_pinconf_type(enum pin_config_param param, + enum scmi_pinctrl_conf_type *type) +{ + u32 arg = param; + + switch (arg) { + case PIN_CONFIG_BIAS_BUS_HOLD: + *type = SCMI_PIN_BIAS_BUS_HOLD; + break; + case PIN_CONFIG_BIAS_DISABLE: + *type = SCMI_PIN_BIAS_DISABLE; + break; + case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: + *type = SCMI_PIN_BIAS_HIGH_IMPEDANCE; + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + *type = SCMI_PIN_BIAS_PULL_DOWN; + break; + case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT: + *type = SCMI_PIN_BIAS_PULL_DEFAULT; + break; + case PIN_CONFIG_BIAS_PULL_UP: + *type = SCMI_PIN_BIAS_PULL_UP; + break; + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + *type = SCMI_PIN_DRIVE_OPEN_DRAIN; + break; + case PIN_CONFIG_DRIVE_OPEN_SOURCE: + *type = SCMI_PIN_DRIVE_OPEN_SOURCE; + break; + case PIN_CONFIG_DRIVE_PUSH_PULL: + *type = SCMI_PIN_DRIVE_PUSH_PULL; + break; + case PIN_CONFIG_DRIVE_STRENGTH: + *type = SCMI_PIN_DRIVE_STRENGTH; + break; + case PIN_CONFIG_DRIVE_STRENGTH_UA: + *type = SCMI_PIN_DRIVE_STRENGTH; + break; + case PIN_CONFIG_INPUT_DEBOUNCE: + *type = SCMI_PIN_INPUT_DEBOUNCE; + break; + case PIN_CONFIG_INPUT_ENABLE: + *type = SCMI_PIN_INPUT_MODE; + break; + case PIN_CONFIG_INPUT_SCHMITT: + *type = SCMI_PIN_INPUT_SCHMITT; + break; + case PIN_CONFIG_INPUT_SCHMITT_ENABLE: + *type = SCMI_PIN_INPUT_MODE; + break; + case PIN_CONFIG_MODE_LOW_POWER: + *type = SCMI_PIN_LOW_POWER_MODE; + break; + case PIN_CONFIG_OUTPUT: + *type = SCMI_PIN_OUTPUT_VALUE; + break; + case PIN_CONFIG_OUTPUT_ENABLE: + *type = SCMI_PIN_OUTPUT_MODE; + break; + case PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS: + *type = SCMI_PIN_OUTPUT_VALUE; + break; + case PIN_CONFIG_POWER_SOURCE: + *type = SCMI_PIN_POWER_SOURCE; + break; + case PIN_CONFIG_SLEW_RATE: + *type = SCMI_PIN_SLEW_RATE; + break; + case SCMI_PIN_OEM_START ... SCMI_PIN_OEM_END: + *type = arg; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int pinctrl_scmi_pinconf_get(struct pinctrl_dev *pctldev, + unsigned int pin, unsigned long *config) +{ + int ret; + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + enum pin_config_param config_type; + enum scmi_pinctrl_conf_type type; + u32 config_value; + + if (!config) + return -EINVAL; + + config_type = pinconf_to_config_param(*config); + + ret = pinctrl_scmi_map_pinconf_type(config_type, &type); + if (ret) + return ret; + + ret = pinctrl_ops->settings_get_one(pmx->ph, pin, PIN_TYPE, type, + &config_value); + /* Convert SCMI error code to PINCTRL expected error code */ + if (ret == -EOPNOTSUPP) + return -ENOTSUPP; + if (ret) + return ret; + + *config = pinconf_to_config_packed(config_type, config_value); + + return 0; +} + +static int +pinctrl_scmi_alloc_configs(struct pinctrl_dev *pctldev, u32 num_configs, + u32 **p_config_value, + enum scmi_pinctrl_conf_type **p_config_type) +{ + if (num_configs <= SCMI_NUM_CONFIGS) + return 0; + + *p_config_value = kcalloc(num_configs, sizeof(**p_config_value), GFP_KERNEL); + if (!*p_config_value) + return -ENOMEM; + + *p_config_type = kcalloc(num_configs, sizeof(**p_config_type), GFP_KERNEL); + if (!*p_config_type) { + kfree(*p_config_value); + return -ENOMEM; + } + + return 0; +} + +static void +pinctrl_scmi_free_configs(struct pinctrl_dev *pctldev, u32 num_configs, + u32 **p_config_value, + enum scmi_pinctrl_conf_type **p_config_type) +{ + if (num_configs <= SCMI_NUM_CONFIGS) + return; + + kfree(*p_config_value); + kfree(*p_config_type); +} + +static int pinctrl_scmi_pinconf_set(struct pinctrl_dev *pctldev, + unsigned int pin, + unsigned long *configs, + unsigned int num_configs) +{ + int i, ret; + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + enum scmi_pinctrl_conf_type config_type[SCMI_NUM_CONFIGS]; + u32 config_value[SCMI_NUM_CONFIGS]; + enum scmi_pinctrl_conf_type *p_config_type = config_type; + u32 *p_config_value = config_value; + enum pin_config_param param; + + if (!configs || !num_configs) + return -EINVAL; + + ret = pinctrl_scmi_alloc_configs(pctldev, num_configs, &p_config_type, + &p_config_value); + if (ret) + return ret; + + for (i = 0; i < num_configs; i++) { + param = pinconf_to_config_param(configs[i]); + ret = pinctrl_scmi_map_pinconf_type(param, &p_config_type[i]); + if (ret) { + dev_err(pmx->dev, "Error map pinconf_type %d\n", ret); + goto free_config; + } + p_config_value[i] = pinconf_to_config_argument(configs[i]); + } + + ret = pinctrl_ops->settings_conf(pmx->ph, pin, PIN_TYPE, num_configs, + p_config_type, p_config_value); + if (ret) + dev_err(pmx->dev, "Error parsing config %d\n", ret); + +free_config: + pinctrl_scmi_free_configs(pctldev, num_configs, &p_config_type, + &p_config_value); + return ret; +} + +static int pinctrl_scmi_pinconf_group_set(struct pinctrl_dev *pctldev, + unsigned int group, + unsigned long *configs, + unsigned int num_configs) +{ + int i, ret; + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + enum scmi_pinctrl_conf_type config_type[SCMI_NUM_CONFIGS]; + u32 config_value[SCMI_NUM_CONFIGS]; + enum scmi_pinctrl_conf_type *p_config_type = config_type; + u32 *p_config_value = config_value; + enum pin_config_param param; + + if (!configs || !num_configs) + return -EINVAL; + + ret = pinctrl_scmi_alloc_configs(pctldev, num_configs, &p_config_type, + &p_config_value); + if (ret) + return ret; + + for (i = 0; i < num_configs; i++) { + param = pinconf_to_config_param(configs[i]); + ret = pinctrl_scmi_map_pinconf_type(param, &p_config_type[i]); + if (ret) { + dev_err(pmx->dev, "Error map pinconf_type %d\n", ret); + goto free_config; + } + + p_config_value[i] = pinconf_to_config_argument(configs[i]); + } + + ret = pinctrl_ops->settings_conf(pmx->ph, group, GROUP_TYPE, + num_configs, p_config_type, + p_config_value); + if (ret) + dev_err(pmx->dev, "Error parsing config %d", ret); + +free_config: + pinctrl_scmi_free_configs(pctldev, num_configs, &p_config_type, + &p_config_value); + return ret; +}; + +static int pinctrl_scmi_pinconf_group_get(struct pinctrl_dev *pctldev, + unsigned int group, + unsigned long *config) +{ + int ret; + struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + enum pin_config_param config_type; + enum scmi_pinctrl_conf_type type; + u32 config_value; + + if (!config) + return -EINVAL; + + config_type = pinconf_to_config_param(*config); + ret = pinctrl_scmi_map_pinconf_type(config_type, &type); + if (ret) { + dev_err(pmx->dev, "Error map pinconf_type %d\n", ret); + return ret; + } + + ret = pinctrl_ops->settings_get_one(pmx->ph, group, GROUP_TYPE, type, + &config_value); + /* Convert SCMI error code to PINCTRL expected error code */ + if (ret == -EOPNOTSUPP) + return -ENOTSUPP; + if (ret) + return ret; + + *config = pinconf_to_config_packed(config_type, config_value); + + return 0; +} + +static const struct pinconf_ops pinctrl_scmi_pinconf_ops = { + .is_generic = true, + .pin_config_get = pinctrl_scmi_pinconf_get, + .pin_config_set = pinctrl_scmi_pinconf_set, + .pin_config_group_set = pinctrl_scmi_pinconf_group_set, + .pin_config_group_get = pinctrl_scmi_pinconf_group_get, + .pin_config_config_dbg_show = pinconf_generic_dump_config, +}; + +static int pinctrl_scmi_get_pins(struct scmi_pinctrl *pmx, + struct pinctrl_desc *desc) +{ + struct pinctrl_pin_desc *pins; + unsigned int npins; + int ret, i; + + npins = pinctrl_ops->count_get(pmx->ph, PIN_TYPE); + /* + * npins will never be zero, the scmi pinctrl driver has bailed out + * if npins is zero. + */ + pins = devm_kmalloc_array(pmx->dev, npins, sizeof(*pins), GFP_KERNEL); + if (!pins) + return -ENOMEM; + + for (i = 0; i < npins; i++) { + pins[i].number = i; + /* + * The memory for name is handled by the scmi firmware driver, + * no need free here + */ + ret = pinctrl_ops->name_get(pmx->ph, i, PIN_TYPE, &pins[i].name); + if (ret) + return dev_err_probe(pmx->dev, ret, + "Can't get name for pin %d", i); + } + + desc->npins = npins; + desc->pins = pins; + dev_dbg(pmx->dev, "got pins %u", npins); + + return 0; +} + +static int scmi_pinctrl_probe(struct scmi_device *sdev) +{ + int ret; + struct device *dev = &sdev->dev; + struct scmi_pinctrl *pmx; + const struct scmi_handle *handle; + struct scmi_protocol_handle *ph; + + if (!sdev->handle) + return -EINVAL; + + handle = sdev->handle; + + pinctrl_ops = handle->devm_protocol_get(sdev, SCMI_PROTOCOL_PINCTRL, &ph); + if (IS_ERR(pinctrl_ops)) + return PTR_ERR(pinctrl_ops); + + pmx = devm_kzalloc(dev, sizeof(*pmx), GFP_KERNEL); + if (!pmx) + return -ENOMEM; + + pmx->ph = ph; + + pmx->dev = dev; + pmx->pctl_desc.name = DRV_NAME; + pmx->pctl_desc.owner = THIS_MODULE; + pmx->pctl_desc.pctlops = &pinctrl_scmi_pinctrl_ops; + pmx->pctl_desc.pmxops = &pinctrl_scmi_pinmux_ops; + pmx->pctl_desc.confops = &pinctrl_scmi_pinconf_ops; + + ret = pinctrl_scmi_get_pins(pmx, &pmx->pctl_desc); + if (ret) + return ret; + + ret = devm_pinctrl_register_and_init(dev, &pmx->pctl_desc, pmx, + &pmx->pctldev); + if (ret) + return dev_err_probe(dev, ret, "Failed to register pinctrl\n"); + + pmx->nr_functions = pinctrl_scmi_get_functions_count(pmx->pctldev); + pmx->functions = devm_kcalloc(dev, pmx->nr_functions, + sizeof(*pmx->functions), GFP_KERNEL); + if (!pmx->functions) + return -ENOMEM; + + return pinctrl_enable(pmx->pctldev); +} + +static const struct scmi_device_id scmi_id_table[] = { + { SCMI_PROTOCOL_PINCTRL, "pinctrl" }, + { } +}; +MODULE_DEVICE_TABLE(scmi, scmi_id_table); + +static struct scmi_driver scmi_pinctrl_driver = { + .name = DRV_NAME, + .probe = scmi_pinctrl_probe, + .id_table = scmi_id_table, +}; +module_scmi_driver(scmi_pinctrl_driver); + +MODULE_AUTHOR("Oleksii Moisieiev <oleksii_moisieiev@epam.com>"); +MODULE_AUTHOR("Peng Fan <peng.fan@nxp.com>"); +MODULE_DESCRIPTION("ARM SCMI pin controller driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index b807141acc14..3a9bb5b9a9e8 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -737,6 +737,89 @@ struct scmi_powercap_proto_ops { u32 *power_thresh_high); }; +enum scmi_pinctrl_selector_type { + PIN_TYPE = 0, + GROUP_TYPE, + FUNCTION_TYPE, +}; + +enum scmi_pinctrl_conf_type { + SCMI_PIN_DEFAULT = 0, + SCMI_PIN_BIAS_BUS_HOLD = 1, + SCMI_PIN_BIAS_DISABLE = 2, + SCMI_PIN_BIAS_HIGH_IMPEDANCE = 3, + SCMI_PIN_BIAS_PULL_UP = 4, + SCMI_PIN_BIAS_PULL_DEFAULT = 5, + SCMI_PIN_BIAS_PULL_DOWN = 6, + SCMI_PIN_DRIVE_OPEN_DRAIN = 7, + SCMI_PIN_DRIVE_OPEN_SOURCE = 8, + SCMI_PIN_DRIVE_PUSH_PULL = 9, + SCMI_PIN_DRIVE_STRENGTH = 10, + SCMI_PIN_INPUT_DEBOUNCE = 11, + SCMI_PIN_INPUT_MODE = 12, + SCMI_PIN_PULL_MODE = 13, + SCMI_PIN_INPUT_VALUE = 14, + SCMI_PIN_INPUT_SCHMITT = 15, + SCMI_PIN_LOW_POWER_MODE = 16, + SCMI_PIN_OUTPUT_MODE = 17, + SCMI_PIN_OUTPUT_VALUE = 18, + SCMI_PIN_POWER_SOURCE = 19, + SCMI_PIN_SLEW_RATE = 20, + SCMI_PIN_OEM_START = 192, + SCMI_PIN_OEM_END = 255, +}; + +/** + * struct scmi_pinctrl_proto_ops - represents the various operations provided + * by SCMI Pinctrl Protocol + * + * @count_get: returns count of the registered elements in given type + * @name_get: returns name by index of given type + * @group_pins_get: returns the set of pins, assigned to the specified group + * @function_groups_get: returns the set of groups, assigned to the specified + * function + * @mux_set: set muxing function for groups of pins + * @settings_get_one: returns one configuration parameter for pin or group + * specified by config_type + * @settings_get_all: returns all configuration parameters for pin or group + * @settings_conf: sets the configuration parameter for pin or group + * @pin_request: aquire pin before selecting mux setting + * @pin_free: frees pin, acquired by request_pin call + */ +struct scmi_pinctrl_proto_ops { + int (*count_get)(const struct scmi_protocol_handle *ph, + enum scmi_pinctrl_selector_type type); + int (*name_get)(const struct scmi_protocol_handle *ph, u32 selector, + enum scmi_pinctrl_selector_type type, + const char **name); + int (*group_pins_get)(const struct scmi_protocol_handle *ph, + u32 selector, const unsigned int **pins, + unsigned int *nr_pins); + int (*function_groups_get)(const struct scmi_protocol_handle *ph, + u32 selector, unsigned int *nr_groups, + const unsigned int **groups); + int (*mux_set)(const struct scmi_protocol_handle *ph, u32 selector, + u32 group); + int (*settings_get_one)(const struct scmi_protocol_handle *ph, + u32 selector, + enum scmi_pinctrl_selector_type type, + enum scmi_pinctrl_conf_type config_type, + u32 *config_value); + int (*settings_get_all)(const struct scmi_protocol_handle *ph, + u32 selector, + enum scmi_pinctrl_selector_type type, + unsigned int *nr_configs, + enum scmi_pinctrl_conf_type *config_types, + u32 *config_values); + int (*settings_conf)(const struct scmi_protocol_handle *ph, + u32 selector, enum scmi_pinctrl_selector_type type, + unsigned int nr_configs, + enum scmi_pinctrl_conf_type *config_type, + u32 *config_value); + int (*pin_request)(const struct scmi_protocol_handle *ph, u32 pin); + int (*pin_free)(const struct scmi_protocol_handle *ph, u32 pin); +}; + /** * struct scmi_notify_ops - represents notifications' operations provided by * SCMI core @@ -783,8 +866,6 @@ struct scmi_notify_ops { const u32 *src_id, struct notifier_block *nb); int (*devm_event_notifier_unregister)(struct scmi_device *sdev, - u8 proto_id, u8 evt_id, - const u32 *src_id, struct notifier_block *nb); int (*event_notifier_register)(const struct scmi_handle *handle, u8 proto_id, u8 evt_id, @@ -844,6 +925,7 @@ enum scmi_std_protocol { SCMI_PROTOCOL_RESET = 0x16, SCMI_PROTOCOL_VOLTAGE = 0x17, SCMI_PROTOCOL_POWERCAP = 0x18, + SCMI_PROTOCOL_PINCTRL = 0x19, }; enum scmi_system_events { diff --git a/include/trace/events/scmi.h b/include/trace/events/scmi.h index 422c1ad9484d..127300481123 100644 --- a/include/trace/events/scmi.h +++ b/include/trace/events/scmi.h @@ -7,6 +7,8 @@ #include <linux/tracepoint.h> +#define TRACE_SCMI_MAX_TAG_LEN 6 + TRACE_EVENT(scmi_fc_call, TP_PROTO(u8 protocol_id, u8 msg_id, u32 res_id, u32 val1, u32 val2), TP_ARGS(protocol_id, msg_id, res_id, val1, val2), @@ -150,7 +152,7 @@ TRACE_EVENT(scmi_msg_dump, __field(u8, channel_id) __field(u8, protocol_id) __field(u8, msg_id) - __array(char, tag, 5) + __array(char, tag, TRACE_SCMI_MAX_TAG_LEN) __field(u16, seq) __field(int, status) __field(size_t, len) @@ -162,7 +164,7 @@ TRACE_EVENT(scmi_msg_dump, __entry->channel_id = channel_id; __entry->protocol_id = protocol_id; __entry->msg_id = msg_id; - strscpy(__entry->tag, tag, 5); + strscpy(__entry->tag, tag, TRACE_SCMI_MAX_TAG_LEN); __entry->seq = seq; __entry->status = status; __entry->len = len; |