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// 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 },
{ /* 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);
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