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Signed-off-by: Oleksii Moisieiev Co-developed-by: Peng Fan Signed-off-by: Peng Fan --- MAINTAINERS | 6 + drivers/firmware/arm_scmi/Makefile | 1 + drivers/firmware/arm_scmi/driver.c | 2 + drivers/firmware/arm_scmi/pinctrl.c | 930 ++++++++++++++++++++++++++++++++++ drivers/firmware/arm_scmi/protocols.h | 1 + include/linux/scmi_protocol.h | 73 +++ 6 files changed, 1013 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 0275a2c58f0f..487bff0d44c0 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -21322,6 +21322,12 @@ F: include/linux/sc[mp]i_protocol.h F: include/trace/events/scmi.h F: include/uapi/linux/virtio_scmi.h +SYSTEM CONTROL MANAGEMENT INTERFACE (SCMI) PINCTRL DRIVER +M: Oleksii Moisieiev +L: linux-arm-kernel@lists.infradead.org +S: Maintained +F: drivers/firmware/arm_scmi/pinctrl.c + SYSTEM RESET/SHUTDOWN DRIVERS M: Sebastian Reichel L: linux-pm@vger.kernel.org diff --git a/drivers/firmware/arm_scmi/Makefile b/drivers/firmware/arm_scmi/Makefile index a7bc4796519c..8e3874ff1544 100644 --- a/drivers/firmware/arm_scmi/Makefile +++ b/drivers/firmware/arm_scmi/Makefile @@ -11,6 +11,7 @@ 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 += 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/driver.c b/drivers/firmware/arm_scmi/driver.c index a12afc254afa..4c3752749105 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -3050,6 +3050,7 @@ 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); } @@ -3067,6 +3068,7 @@ 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/pinctrl.c b/drivers/firmware/arm_scmi/pinctrl.c new file mode 100644 index 000000000000..aa6e698e7b7c --- /dev/null +++ b/drivers/firmware/arm_scmi/pinctrl.c @@ -0,0 +1,930 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * System Control and Management Interface (SCMI) Pinctrl Protocol + * + * Copyright (C) 2023 EPAM + */ + +#include +#include +#include + +#include "common.h" +#include "protocols.h" + +/* Updated only after ALL the mandatory features for that version are merged */ +#define SCMI_PROTOCOL_SUPPORTED_VERSION 0x40000 + +#define REG_TYPE_BITS GENMASK(9, 8) +#define REG_CONFIG GENMASK(7, 0) + +#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)) + +enum scmi_pinctrl_protocol_cmd { + PINCTRL_ATTRIBUTES = 0x3, + PINCTRL_LIST_ASSOCIATIONS = 0x4, + PINCTRL_CONFIG_GET = 0x5, + PINCTRL_CONFIG_SET = 0x6, + PINCTRL_FUNCTION_SELECT = 0x7, + PINCTRL_REQUEST = 0x8, + PINCTRL_RELEASE = 0x9, + PINCTRL_NAME_GET = 0xa, + PINCTRL_SET_PERMISSIONS = 0xb +}; + +struct scmi_msg_conf_set { + __le32 identifier; + __le32 attributes; + __le32 configs[]; +}; + +struct scmi_msg_conf_get { + __le32 identifier; + __le32 attributes; +}; + +struct scmi_resp_conf_get { + __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_func_set { + __le32 identifier; + __le32 function_id; + __le32 flags; +}; + +struct scmi_msg_request { + __le32 identifier; + __le32 flags; +}; + +struct scmi_group_info { + char name[SCMI_MAX_STR_SIZE]; + bool present; + unsigned int *group_pins; + unsigned int nr_pins; +}; + +struct scmi_function_info { + char name[SCMI_MAX_STR_SIZE]; + bool present; + unsigned int *groups; + unsigned int 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); + } + + 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 identifier, + enum scmi_pinctrl_selector_type type) +{ + int value; + + value = scmi_pinctrl_count_get(ph, type); + if (value < 0) + return value; + + if (identifier >= value) + 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, + unsigned int *n_elems) +{ + int ret; + struct scmi_xfer *t; + struct scmi_msg_pinctrl_attributes *tx; + struct scmi_resp_pinctrl_attributes *rx; + + 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); + } + + ph->xops->xfer_put(ph, t); + + /* + * If supported overwrite short name with the extended one; + * on error just carry on and use already provided short name. + */ + if (!ret && EXT_NAME_FLAG(rx->attributes)) + 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; + unsigned int *array; +}; + +static void iter_pinctrl_assoc_prepare_message(void *message, + unsigned int 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); + /* Set the number of OPPs to be skipped/already read */ + 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, unsigned int *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_conf_get_ipriv { + u32 selector; + enum scmi_pinctrl_selector_type type; + u8 all; + u8 *config_types; + u32 *config_values; +}; + +static void iter_pinctrl_conf_get_prepare_message(void *message, + unsigned int desc_index, + const void *priv) +{ + struct scmi_msg_conf_get *msg = message; + const struct scmi_conf_get_ipriv *p = priv; + u32 attributes; + + attributes = FIELD_PREP(BIT(18), p->all) | + FIELD_PREP(GENMASK(17, 16), p->type); + + if (p->all) + attributes |= FIELD_PREP(GENMASK(15, 8), desc_index); + else + attributes |= FIELD_PREP(GENMASK(7, 0), p->config_types[0]); + + msg->attributes = cpu_to_le32(attributes); + msg->identifier = cpu_to_le32(p->selector); +} + +static int iter_pinctrl_conf_get_update_state(struct scmi_iterator_state *st, + const void *response, void *priv) +{ + const struct scmi_resp_conf_get *r = response; + struct scmi_conf_get_ipriv *p = priv; + + if (!p->all) { + st->num_returned = 1; + st->num_remaining = 0; + } else { + st->num_returned = le32_get_bits(r->num_configs, GENMASK(7, 0)); + st->num_remaining = le32_get_bits(r->num_configs, GENMASK(31, 24)); + } + + return 0; +} + +static int iter_pinctrl_conf_get_process_response(const struct scmi_protocol_handle *ph, + const void *response, + struct scmi_iterator_state *st, void *priv) +{ + const struct scmi_resp_conf_get *r = response; + struct scmi_conf_get_ipriv *p = priv; + + if (!p->all) { + if (p->config_types[0] != + le32_get_bits(r->configs[st->loop_idx * 2], GENMASK(7, 0))) + return -EINVAL; + } else { + p->config_types[st->desc_index + st->loop_idx] = + le32_get_bits(r->configs[st->loop_idx * 2], GENMASK(7, 0)); + } + + p->config_values[st->desc_index + st->loop_idx] = + le32_to_cpu(r->configs[st->loop_idx * 2 + 1]); + + return 0; +} + +static int scmi_pinctrl_config_get(const struct scmi_protocol_handle *ph, + u32 selector, + enum scmi_pinctrl_selector_type type, + u8 config_type, u32 *config_value) +{ + int ret; + void *iter; + struct scmi_iterator_ops ops = { + .prepare_message = iter_pinctrl_conf_get_prepare_message, + .update_state = iter_pinctrl_conf_get_update_state, + .process_response = iter_pinctrl_conf_get_process_response, + }; + struct scmi_conf_get_ipriv ipriv = { + .selector = selector, + .type = type, + .all = 0, + .config_types = &config_type, + .config_values = config_value, + }; + + if (!config_value || type == FUNCTION_TYPE) + return -EINVAL; + + ret = scmi_pinctrl_validate_id(ph, selector, type); + if (ret) + return ret; + + iter = ph->hops->iter_response_init(ph, &ops, 1, PINCTRL_CONFIG_GET, + sizeof(struct scmi_msg_conf_get), + &ipriv); + + if (IS_ERR(iter)) + return PTR_ERR(iter); + + return ph->hops->iter_response_run(iter); +} + +static int scmi_pinctrl_config_get_all(const struct scmi_protocol_handle *ph, + u32 selector, + enum scmi_pinctrl_selector_type type, + u16 size, u8 *config_types, + u32 *config_values) +{ + int ret; + void *iter; + struct scmi_iterator_ops ops = { + .prepare_message = iter_pinctrl_conf_get_prepare_message, + .update_state = iter_pinctrl_conf_get_update_state, + .process_response = iter_pinctrl_conf_get_process_response, + }; + struct scmi_conf_get_ipriv ipriv = { + .selector = selector, + .type = type, + .all = 1, + .config_types = config_types, + .config_values = config_values, + }; + + if (!config_values || !config_types || type == FUNCTION_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_CONFIG_GET, + sizeof(struct scmi_msg_conf_get), + &ipriv); + + if (IS_ERR(iter)) + return PTR_ERR(iter); + + return ph->hops->iter_response_run(iter); +} + +static int scmi_pinctrl_config_set(const struct scmi_protocol_handle *ph, + u32 selector, enum scmi_pinctrl_selector_type type, + unsigned int nr_configs, u8 *config_type, + u32 *config_value) +{ + struct scmi_xfer *t; + struct scmi_msg_conf_set *tx; + u32 attributes; + int ret, i; + unsigned int configs_in_chunk, conf_num = 0; + unsigned int 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_CONFIG_SET, + sizeof(*tx) + chunk * 2 * sizeof(__le32), + 0, &t); + if (ret) + return ret; + + tx = t->tx.buf; + tx->identifier = cpu_to_le32(selector); + 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 identifier, + enum scmi_pinctrl_selector_type type, + u32 function_id) +{ + int ret; + struct scmi_xfer *t; + struct scmi_msg_func_set *tx; + + if (type == FUNCTION_TYPE) + return -EINVAL; + + ret = scmi_pinctrl_validate_id(ph, identifier, type); + if (ret) + return ret; + + ret = ph->xops->xfer_get_init(ph, PINCTRL_FUNCTION_SELECT, sizeof(*tx), 0, &t); + if (ret) + return ret; + + tx = t->tx.buf; + tx->identifier = cpu_to_le32(identifier); + tx->function_id = cpu_to_le32(function_id); + 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_request(const struct scmi_protocol_handle *ph, + u32 identifier, + enum scmi_pinctrl_selector_type type) +{ + int ret; + struct scmi_xfer *t; + struct scmi_msg_request *tx; + + if (type == FUNCTION_TYPE) + return -EINVAL; + + ret = scmi_pinctrl_validate_id(ph, identifier, type); + if (ret) + return ret; + + ret = ph->xops->xfer_get_init(ph, PINCTRL_REQUEST, sizeof(*tx), 0, &t); + + 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(ph, pin, PIN_TYPE); +} + +static int scmi_pinctrl_free(const struct scmi_protocol_handle *ph, + u32 identifier, + enum scmi_pinctrl_selector_type type) +{ + int ret; + struct scmi_xfer *t; + struct scmi_msg_request *tx; + + if (type == FUNCTION_TYPE) + return -EINVAL; + + ret = scmi_pinctrl_validate_id(ph, identifier, type); + if (ret) + return ret; + + ret = ph->xops->xfer_get_init(ph, PINCTRL_RELEASE, sizeof(*tx), 0, &t); + + 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_free(const struct scmi_protocol_handle *ph, u32 pin) +{ + return scmi_pinctrl_free(ph, pin, PIN_TYPE); +} + +static int scmi_pinctrl_get_group_info(const struct scmi_protocol_handle *ph, + u32 selector, + struct scmi_group_info *group) +{ + int ret; + + if (!group) + return -EINVAL; + + 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) + 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 unsigned int **pins, + unsigned int *nr_pins) +{ + struct scmi_pinctrl_info *pi = ph->get_priv(ph); + + if (!pins || !nr_pins) + return -EINVAL; + + if (selector >= pi->nr_groups) + 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; + + if (!func) + return -EINVAL; + + 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) + 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, + unsigned int *nr_groups, + const unsigned int **groups) +{ + struct scmi_pinctrl_info *pi = ph->get_priv(ph); + + if (!groups || !nr_groups) + return -EINVAL; + + if (selector >= pi->nr_functions) + 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, + .config_get = scmi_pinctrl_config_get, + .config_get_all = scmi_pinctrl_config_get_all, + .config_set = scmi_pinctrl_config_set, + .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); + + for (i = 0; i < pi->nr_groups; i++) { + if (pi->groups[i].present) { + kfree(pi->groups[i].group_pins); + pi->groups[i].present = false; + } + } + + 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 b5c65f26207b..996410962b91 100644 --- a/drivers/firmware/arm_scmi/protocols.h +++ b/drivers/firmware/arm_scmi/protocols.h @@ -348,6 +348,7 @@ 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/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index f2f05fb42d28..d8e2bb828ee7 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -717,6 +717,78 @@ struct scmi_powercap_proto_ops { u32 *power_thresh_high); }; +enum scmi_pinctrl_selector_type { + PIN_TYPE = 0, + GROUP_TYPE, + FUNCTION_TYPE, +}; + +/** + * 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 + * @config_get: returns configuration parameter for pin or group + * @config_set: 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 (*config_get)(const struct scmi_protocol_handle *ph, u32 selector, + enum scmi_pinctrl_selector_type type, + u8 config_type, u32 *config_value); + int (*config_get_all)(const struct scmi_protocol_handle *ph, + u32 selector, + enum scmi_pinctrl_selector_type type, u16 size, + u8 *config_types, u32 *config_values); + int (*config_set)(const struct scmi_protocol_handle *ph, u32 selector, + enum scmi_pinctrl_selector_type type, + unsigned int nr_configs, + u8 *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); +}; + +enum scmi_pinctrl_conf_type { + SCMI_PIN_NONE = 0x0, + SCMI_PIN_BIAS_BUS_HOLD = 0x1, + SCMI_PIN_BIAS_DISABLE = 0x2, + SCMI_PIN_BIAS_HIGH_IMPEDANCE = 0x3, + SCMI_PIN_BIAS_PULL_UP = 0x4, + SCMI_PIN_BIAS_PULL_DEFAULT = 0x5, + SCMI_PIN_BIAS_PULL_DOWN = 0x6, + SCMI_PIN_DRIVE_OPEN_DRAIN = 0x7, + SCMI_PIN_DRIVE_OPEN_SOURCE = 0x8, + SCMI_PIN_DRIVE_PUSH_PULL = 0x9, + SCMI_PIN_DRIVE_STRENGTH = 0xA, + SCMI_PIN_INPUT_DEBOUNCE = 0xB, + SCMI_PIN_INPUT_MODE = 0xC, + SCMI_PIN_PULL_MODE = 0xD, + SCMI_PIN_INPUT_VALUE = 0xE, + SCMI_PIN_INPUT_SCHMITT = 0xF, + SCMI_PIN_LOW_POWER_MODE = 0x10, + SCMI_PIN_OUTPUT_MODE = 0x11, + SCMI_PIN_OUTPUT_VALUE = 0x12, + SCMI_PIN_POWER_SOURCE = 0x13, + SCMI_PIN_SLEW_RATE = 0x20, + SCMI_PIN_OEM_START = 0xC0, + SCMI_PIN_OEM_END = 0xFF, +}; + /** * struct scmi_notify_ops - represents notifications' operations provided by * SCMI core @@ -824,6 +896,7 @@ enum scmi_std_protocol { SCMI_PROTOCOL_RESET = 0x16, SCMI_PROTOCOL_VOLTAGE = 0x17, SCMI_PROTOCOL_POWERCAP = 0x18, + SCMI_PROTOCOL_PINCTRL = 0x19, }; enum scmi_system_events {