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 { .family = "AM62PX", .data = &am62p_ep_map },
30 { .family = "J722S", .data = &am62p_ep_map },
31 { /* sentinel */ }
32 };
33
psil_get_ep_config(u32 thread_id)34 struct 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 }
72 EXPORT_SYMBOL_GPL(psil_get_ep_config);
73
psil_set_new_ep_config(struct device * dev,const char * name,struct psil_endpoint_config * ep_config)74 int 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 }
108 EXPORT_SYMBOL_GPL(psil_set_new_ep_config);
109 MODULE_DESCRIPTION("K3 PSI-L endpoint configuration");
110 MODULE_LICENSE("GPL v2");
111