1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
4*4882a593Smuzhiyun * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <linux/kernel.h>
8*4882a593Smuzhiyun #include <linux/device.h>
9*4882a593Smuzhiyun #include <linux/init.h>
10*4882a593Smuzhiyun #include <linux/mutex.h>
11*4882a593Smuzhiyun #include <linux/of.h>
12*4882a593Smuzhiyun #include <linux/sys_soc.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include "k3-psil-priv.h"
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun static DEFINE_MUTEX(ep_map_mutex);
17*4882a593Smuzhiyun static const struct psil_ep_map *soc_ep_map;
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun static const struct soc_device_attribute k3_soc_devices[] = {
20*4882a593Smuzhiyun { .family = "AM65X", .data = &am654_ep_map },
21*4882a593Smuzhiyun { .family = "J721E", .data = &j721e_ep_map },
22*4882a593Smuzhiyun { .family = "J7200", .data = &j7200_ep_map },
23*4882a593Smuzhiyun { /* sentinel */ }
24*4882a593Smuzhiyun };
25*4882a593Smuzhiyun
psil_get_ep_config(u32 thread_id)26*4882a593Smuzhiyun struct psil_endpoint_config *psil_get_ep_config(u32 thread_id)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun int i;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun mutex_lock(&ep_map_mutex);
31*4882a593Smuzhiyun if (!soc_ep_map) {
32*4882a593Smuzhiyun const struct soc_device_attribute *soc;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun soc = soc_device_match(k3_soc_devices);
35*4882a593Smuzhiyun if (soc) {
36*4882a593Smuzhiyun soc_ep_map = soc->data;
37*4882a593Smuzhiyun } else {
38*4882a593Smuzhiyun pr_err("PSIL: No compatible machine found for map\n");
39*4882a593Smuzhiyun mutex_unlock(&ep_map_mutex);
40*4882a593Smuzhiyun return ERR_PTR(-ENOTSUPP);
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun pr_debug("%s: Using map for %s\n", __func__, soc_ep_map->name);
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun mutex_unlock(&ep_map_mutex);
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun if (thread_id & K3_PSIL_DST_THREAD_ID_OFFSET && soc_ep_map->dst) {
47*4882a593Smuzhiyun /* check in destination thread map */
48*4882a593Smuzhiyun for (i = 0; i < soc_ep_map->dst_count; i++) {
49*4882a593Smuzhiyun if (soc_ep_map->dst[i].thread_id == thread_id)
50*4882a593Smuzhiyun return &soc_ep_map->dst[i].ep_config;
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun thread_id &= ~K3_PSIL_DST_THREAD_ID_OFFSET;
55*4882a593Smuzhiyun if (soc_ep_map->src) {
56*4882a593Smuzhiyun for (i = 0; i < soc_ep_map->src_count; i++) {
57*4882a593Smuzhiyun if (soc_ep_map->src[i].thread_id == thread_id)
58*4882a593Smuzhiyun return &soc_ep_map->src[i].ep_config;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun return ERR_PTR(-ENOENT);
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(psil_get_ep_config);
65*4882a593Smuzhiyun
psil_set_new_ep_config(struct device * dev,const char * name,struct psil_endpoint_config * ep_config)66*4882a593Smuzhiyun int psil_set_new_ep_config(struct device *dev, const char *name,
67*4882a593Smuzhiyun struct psil_endpoint_config *ep_config)
68*4882a593Smuzhiyun {
69*4882a593Smuzhiyun struct psil_endpoint_config *dst_ep_config;
70*4882a593Smuzhiyun struct of_phandle_args dma_spec;
71*4882a593Smuzhiyun u32 thread_id;
72*4882a593Smuzhiyun int index;
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun if (!dev || !dev->of_node)
75*4882a593Smuzhiyun return -EINVAL;
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun index = of_property_match_string(dev->of_node, "dma-names", name);
78*4882a593Smuzhiyun if (index < 0)
79*4882a593Smuzhiyun return index;
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun if (of_parse_phandle_with_args(dev->of_node, "dmas", "#dma-cells",
82*4882a593Smuzhiyun index, &dma_spec))
83*4882a593Smuzhiyun return -ENOENT;
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun thread_id = dma_spec.args[0];
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun dst_ep_config = psil_get_ep_config(thread_id);
88*4882a593Smuzhiyun if (IS_ERR(dst_ep_config)) {
89*4882a593Smuzhiyun pr_err("PSIL: thread ID 0x%04x not defined in map\n",
90*4882a593Smuzhiyun thread_id);
91*4882a593Smuzhiyun of_node_put(dma_spec.np);
92*4882a593Smuzhiyun return PTR_ERR(dst_ep_config);
93*4882a593Smuzhiyun }
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun memcpy(dst_ep_config, ep_config, sizeof(*dst_ep_config));
96*4882a593Smuzhiyun
97*4882a593Smuzhiyun of_node_put(dma_spec.np);
98*4882a593Smuzhiyun return 0;
99*4882a593Smuzhiyun }
100*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(psil_set_new_ep_config);
101