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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com4 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>5 */6 7#include <linux/kernel.h>8#include <linux/module.h>9#include <linux/device.h>10#include <linux/init.h>11#include <linux/mutex.h>12#include <linux/of.h>13#include <linux/sys_soc.h>14 15#include "k3-psil-priv.h"16 17static DEFINE_MUTEX(ep_map_mutex);18static const struct psil_ep_map *soc_ep_map;19 20static const struct soc_device_attribute k3_soc_devices[] = {21 { .family = "AM65X", .data = &am654_ep_map },22 { .family = "J721E", .data = &j721e_ep_map },23 { .family = "J7200", .data = &j7200_ep_map },24 { .family = "AM64X", .data = &am64_ep_map },25 { .family = "J721S2", .data = &j721s2_ep_map },26 { .family = "AM62X", .data = &am62_ep_map },27 { .family = "AM62AX", .data = &am62a_ep_map },28 { .family = "J784S4", .data = &j784s4_ep_map },29 { .family = "AM62PX", .data = &am62p_ep_map },30 { .family = "J722S", .data = &am62p_ep_map },31 { /* sentinel */ }32};33 34struct psil_endpoint_config *psil_get_ep_config(u32 thread_id)35{36 int i;37 38 mutex_lock(&ep_map_mutex);39 if (!soc_ep_map) {40 const struct soc_device_attribute *soc;41 42 soc = soc_device_match(k3_soc_devices);43 if (soc) {44 soc_ep_map = soc->data;45 } else {46 pr_err("PSIL: No compatible machine found for map\n");47 mutex_unlock(&ep_map_mutex);48 return ERR_PTR(-ENOTSUPP);49 }50 pr_debug("%s: Using map for %s\n", __func__, soc_ep_map->name);51 }52 mutex_unlock(&ep_map_mutex);53 54 if (thread_id & K3_PSIL_DST_THREAD_ID_OFFSET && soc_ep_map->dst) {55 /* check in destination thread map */56 for (i = 0; i < soc_ep_map->dst_count; i++) {57 if (soc_ep_map->dst[i].thread_id == thread_id)58 return &soc_ep_map->dst[i].ep_config;59 }60 }61 62 thread_id &= ~K3_PSIL_DST_THREAD_ID_OFFSET;63 if (soc_ep_map->src) {64 for (i = 0; i < soc_ep_map->src_count; i++) {65 if (soc_ep_map->src[i].thread_id == thread_id)66 return &soc_ep_map->src[i].ep_config;67 }68 }69 70 return ERR_PTR(-ENOENT);71}72EXPORT_SYMBOL_GPL(psil_get_ep_config);73 74int psil_set_new_ep_config(struct device *dev, const char *name,75 struct psil_endpoint_config *ep_config)76{77 struct psil_endpoint_config *dst_ep_config;78 struct of_phandle_args dma_spec;79 u32 thread_id;80 int index;81 82 if (!dev || !dev->of_node)83 return -EINVAL;84 85 index = of_property_match_string(dev->of_node, "dma-names", name);86 if (index < 0)87 return index;88 89 if (of_parse_phandle_with_args(dev->of_node, "dmas", "#dma-cells",90 index, &dma_spec))91 return -ENOENT;92 93 thread_id = dma_spec.args[0];94 95 dst_ep_config = psil_get_ep_config(thread_id);96 if (IS_ERR(dst_ep_config)) {97 pr_err("PSIL: thread ID 0x%04x not defined in map\n",98 thread_id);99 of_node_put(dma_spec.np);100 return PTR_ERR(dst_ep_config);101 }102 103 memcpy(dst_ep_config, ep_config, sizeof(*dst_ep_config));104 105 of_node_put(dma_spec.np);106 return 0;107}108EXPORT_SYMBOL_GPL(psil_set_new_ep_config);109MODULE_DESCRIPTION("K3 PSI-L endpoint configuration");110MODULE_LICENSE("GPL v2");111