blob: bc1ec94f0f5de8e5e6f66f9b3732bf221f052ab0 [file] [log] [blame] [edit]
/*
* Copyright (c) 2016 Wind River Systems, Inc.
* Copyright (c) 2016,2022 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/kernel.h>
#include <zephyr/init.h>
#include <zephyr/drivers/i3c.h>
#include <zephyr/logging/log.h>
LOG_MODULE_DECLARE(i3c, CONFIG_I3C_LOG_LEVEL);
/* Statically allocated array of IBI work item nodes */
static struct i3c_ibi_work i3c_ibi_work_nodes[CONFIG_I3C_IBI_WORKQUEUE_LENGTH];
static K_KERNEL_STACK_DEFINE(i3c_ibi_work_q_stack,
CONFIG_I3C_IBI_WORKQUEUE_STACK_SIZE);
/* IBI workqueue */
static struct k_work_q i3c_ibi_work_q;
static sys_slist_t i3c_ibi_work_nodes_free;
static inline int ibi_work_submit(struct i3c_ibi_work *ibi_node)
{
return k_work_submit_to_queue(&i3c_ibi_work_q, &ibi_node->work);
}
int i3c_ibi_work_enqueue(struct i3c_ibi_work *ibi_work)
{
sys_snode_t *node;
struct i3c_ibi_work *ibi_node;
int ret;
node = sys_slist_get(&i3c_ibi_work_nodes_free);
if (node == NULL) {
ret = -ENOMEM;
goto out;
}
ibi_node = (struct i3c_ibi_work *)node;
(void)memcpy(ibi_node, ibi_work, sizeof(*ibi_node));
ret = ibi_work_submit(ibi_node);
if (ret >= 0) {
ret = 0;
}
out:
return ret;
}
int i3c_ibi_work_enqueue_target_irq(struct i3c_device_desc *target,
uint8_t *payload, size_t payload_len)
{
sys_snode_t *node;
struct i3c_ibi_work *ibi_node;
int ret;
node = sys_slist_get(&i3c_ibi_work_nodes_free);
if (node == NULL) {
ret = -ENOMEM;
goto out;
}
ibi_node = (struct i3c_ibi_work *)node;
ibi_node->type = I3C_IBI_TARGET_INTR;
ibi_node->target = target;
ibi_node->payload.payload_len = payload_len;
if ((payload != NULL) && (payload_len > 0U)) {
(void)memcpy(&ibi_node->payload.payload[0],
payload, payload_len);
}
ret = ibi_work_submit(ibi_node);
if (ret >= 0) {
ret = 0;
}
out:
return ret;
}
int i3c_ibi_work_enqueue_hotjoin(const struct device *dev)
{
sys_snode_t *node;
struct i3c_ibi_work *ibi_node;
int ret;
node = sys_slist_get(&i3c_ibi_work_nodes_free);
if (node == NULL) {
ret = -ENOMEM;
goto out;
}
ibi_node = (struct i3c_ibi_work *)node;
ibi_node->type = I3C_IBI_HOTJOIN;
ibi_node->controller = dev;
ibi_node->payload.payload_len = 0;
ret = ibi_work_submit(ibi_node);
if (ret >= 0) {
ret = 0;
}
out:
return ret;
}
int i3c_ibi_work_enqueue_cb(const struct device *dev,
k_work_handler_t work_cb)
{
sys_snode_t *node;
struct i3c_ibi_work *ibi_node;
int ret;
node = sys_slist_get(&i3c_ibi_work_nodes_free);
if (node == NULL) {
ret = -ENOMEM;
goto out;
}
ibi_node = (struct i3c_ibi_work *)node;
ibi_node->type = I3C_IBI_WORKQUEUE_CB;
ibi_node->controller = dev;
ibi_node->work_cb = work_cb;
ret = ibi_work_submit(ibi_node);
if (ret >= 0) {
ret = 0;
}
out:
return ret;
}
static void i3c_ibi_work_handler(struct k_work *work)
{
struct i3c_ibi_work *ibi_node = CONTAINER_OF(work, struct i3c_ibi_work, work);
struct i3c_ibi_payload *payload;
int ret = 0;
if (IS_ENABLED(CONFIG_I3C_IBI_WORKQUEUE_VERBOSE_DEBUG) &&
((uint32_t)ibi_node->type <= I3C_IBI_TYPE_MAX)) {
LOG_DBG("Processing IBI work %p (type %d, len %u)",
ibi_node, (int)ibi_node->type,
ibi_node->payload.payload_len);
if (ibi_node->payload.payload_len > 0U) {
LOG_HEXDUMP_DBG(&ibi_node->payload.payload[0],
ibi_node->payload.payload_len, "IBI Payload");
}
}
switch (ibi_node->type) {
case I3C_IBI_TARGET_INTR:
if (ibi_node->payload.payload_len != 0U) {
payload = &ibi_node->payload;
} else {
payload = NULL;
}
ret = ibi_node->target->ibi_cb(ibi_node->target, payload);
if ((ret != 0) && (ret != -EBUSY)) {
LOG_ERR("IBI work %p cb returns %d", ibi_node, ret);
}
break;
case I3C_IBI_HOTJOIN:
ret = i3c_do_daa(ibi_node->controller);
if ((ret != 0) && (ret != -EBUSY)) {
LOG_ERR("i3c_do_daa returns %d", ret);
}
break;
case I3C_IBI_WORKQUEUE_CB:
if (ibi_node->work_cb != NULL) {
ibi_node->work_cb(work);
}
break;
case I3C_IBI_CONTROLLER_ROLE_REQUEST:
/* TODO: Add support for controller role request */
__fallthrough;
default:
/* Unknown IBI type: do nothing */
LOG_DBG("Cannot process IBI type %d", (int)ibi_node->type);
break;
}
if (ret == -EBUSY) {
/* Retry if bus is busy. */
if (ibi_work_submit(ibi_node) < 0) {
LOG_ERR("Error re-adding IBI work %p", ibi_node);
}
} else {
/* Add the now processed node back to the free list */
sys_slist_append(&i3c_ibi_work_nodes_free, (sys_snode_t *)ibi_node);
}
}
static int i3c_ibi_work_q_init(void)
{
struct k_work_queue_config cfg = {
.name = "i3c_ibi_workq",
.no_yield = true,
};
/* Init the linked list of work item nodes */
sys_slist_init(&i3c_ibi_work_nodes_free);
for (int i = 0; i < ARRAY_SIZE(i3c_ibi_work_nodes); i++) {
i3c_ibi_work_nodes[i].work.handler = i3c_ibi_work_handler;
sys_slist_append(&i3c_ibi_work_nodes_free,
(sys_snode_t *)&i3c_ibi_work_nodes[i]);
}
/* Start the workqueue */
k_work_queue_start(&i3c_ibi_work_q, i3c_ibi_work_q_stack,
K_KERNEL_STACK_SIZEOF(i3c_ibi_work_q_stack),
CONFIG_I3C_IBI_WORKQUEUE_PRIORITY, &cfg);
return 0;
}
SYS_INIT(i3c_ibi_work_q_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);