1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
4 * 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
17 static DEFINE_MUTEX(ep_map_mutex);
18 static const struct psil_ep_map *soc_ep_map;
19
20 static 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 { /* sentinel */ }
30 };
31
psil_get_ep_config(u32 thread_id)32 struct psil_endpoint_config *psil_get_ep_config(u32 thread_id)
33 {
34 int i;
35
36 mutex_lock(&ep_map_mutex);
37 if (!soc_ep_map) {
38 const struct soc_device_attribute *soc;
39
40 soc = soc_device_match(k3_soc_devices);
41 if (soc) {
42 soc_ep_map = soc->data;
43 } else {
44 pr_err("PSIL: No compatible machine found for map\n");
45 mutex_unlock(&ep_map_mutex);
46 return ERR_PTR(-ENOTSUPP);
47 }
48 pr_debug("%s: Using map for %s\n", __func__, soc_ep_map->name);
49 }
50 mutex_unlock(&ep_map_mutex);
51
52 if (thread_id & K3_PSIL_DST_THREAD_ID_OFFSET && soc_ep_map->dst) {
53 /* check in destination thread map */
54 for (i = 0; i < soc_ep_map->dst_count; i++) {
55 if (soc_ep_map->dst[i].thread_id == thread_id)
56 return &soc_ep_map->dst[i].ep_config;
57 }
58 }
59
60 thread_id &= ~K3_PSIL_DST_THREAD_ID_OFFSET;
61 if (soc_ep_map->src) {
62 for (i = 0; i < soc_ep_map->src_count; i++) {
63 if (soc_ep_map->src[i].thread_id == thread_id)
64 return &soc_ep_map->src[i].ep_config;
65 }
66 }
67
68 return ERR_PTR(-ENOENT);
69 }
70 EXPORT_SYMBOL_GPL(psil_get_ep_config);
71
psil_set_new_ep_config(struct device * dev,const char * name,struct psil_endpoint_config * ep_config)72 int psil_set_new_ep_config(struct device *dev, const char *name,
73 struct psil_endpoint_config *ep_config)
74 {
75 struct psil_endpoint_config *dst_ep_config;
76 struct of_phandle_args dma_spec;
77 u32 thread_id;
78 int index;
79
80 if (!dev || !dev->of_node)
81 return -EINVAL;
82
83 index = of_property_match_string(dev->of_node, "dma-names", name);
84 if (index < 0)
85 return index;
86
87 if (of_parse_phandle_with_args(dev->of_node, "dmas", "#dma-cells",
88 index, &dma_spec))
89 return -ENOENT;
90
91 thread_id = dma_spec.args[0];
92
93 dst_ep_config = psil_get_ep_config(thread_id);
94 if (IS_ERR(dst_ep_config)) {
95 pr_err("PSIL: thread ID 0x%04x not defined in map\n",
96 thread_id);
97 of_node_put(dma_spec.np);
98 return PTR_ERR(dst_ep_config);
99 }
100
101 memcpy(dst_ep_config, ep_config, sizeof(*dst_ep_config));
102
103 of_node_put(dma_spec.np);
104 return 0;
105 }
106 EXPORT_SYMBOL_GPL(psil_set_new_ep_config);
107 MODULE_LICENSE("GPL v2");
108