// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com * Author: Peter Ujfalusi <peter.ujfalusi@ti.com> */ #include <linux/kernel.h> #include <linux/device.h> #include <linux/init.h> #include <linux/mutex.h> #include <linux/of.h> #include <linux/sys_soc.h> #include "k3-psil-priv.h" static DEFINE_MUTEX(ep_map_mutex); static const struct psil_ep_map *soc_ep_map; static const struct soc_device_attribute k3_soc_devices[] = { { .family = "AM65X", .data = &am654_ep_map }, { .family = "J721E", .data = &j721e_ep_map }, { .family = "J7200", .data = &j7200_ep_map }, { .family = "AM64X", .data = &am64_ep_map }, { .family = "J721S2", .data = &j721s2_ep_map }, { /* sentinel */ } }; struct psil_endpoint_config *psil_get_ep_config(u32 thread_id) { int i; mutex_lock(&ep_map_mutex); if (!soc_ep_map) { const struct soc_device_attribute *soc; soc = soc_device_match(k3_soc_devices); if (soc) { soc_ep_map = soc->data; } else { pr_err("PSIL: No compatible machine found for map\n"); mutex_unlock(&ep_map_mutex); return ERR_PTR(-ENOTSUPP); } pr_debug("%s: Using map for %s\n", __func__, soc_ep_map->name); } mutex_unlock(&ep_map_mutex); if (thread_id & K3_PSIL_DST_THREAD_ID_OFFSET && soc_ep_map->dst) { /* check in destination thread map */ for (i = 0; i < soc_ep_map->dst_count; i++) { if (soc_ep_map->dst[i].thread_id == thread_id) return &soc_ep_map->dst[i].ep_config; } } thread_id &= ~K3_PSIL_DST_THREAD_ID_OFFSET; if (soc_ep_map->src) { for (i = 0; i < soc_ep_map->src_count; i++) { if (soc_ep_map->src[i].thread_id == thread_id) return &soc_ep_map->src[i].ep_config; } } return ERR_PTR(-ENOENT); } EXPORT_SYMBOL_GPL(psil_get_ep_config); int psil_set_new_ep_config(struct device *dev, const char *name, struct psil_endpoint_config *ep_config) { struct psil_endpoint_config *dst_ep_config; struct of_phandle_args dma_spec; u32 thread_id; int index; if (!dev || !dev->of_node) return -EINVAL; index = of_property_match_string(dev->of_node, "dma-names", name); if (index < 0) return index; if (of_parse_phandle_with_args(dev->of_node, "dmas", "#dma-cells", index, &dma_spec)) return -ENOENT; thread_id = dma_spec.args[0]; dst_ep_config = psil_get_ep_config(thread_id); if (IS_ERR(dst_ep_config)) { pr_err("PSIL: thread ID 0x%04x not defined in map\n", thread_id); of_node_put(dma_spec.np); return PTR_ERR(dst_ep_config); } memcpy(dst_ep_config, ep_config, sizeof(*dst_ep_config)); of_node_put(dma_spec.np); return 0; } EXPORT_SYMBOL_GPL(psil_set_new_ep_config);