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 { /* sentinel */ } 28 }; 29 30 struct psil_endpoint_config *psil_get_ep_config(u32 thread_id) 31 { 32 int i; 33 34 mutex_lock(&ep_map_mutex); 35 if (!soc_ep_map) { 36 const struct soc_device_attribute *soc; 37 38 soc = soc_device_match(k3_soc_devices); 39 if (soc) { 40 soc_ep_map = soc->data; 41 } else { 42 pr_err("PSIL: No compatible machine found for map\n"); 43 mutex_unlock(&ep_map_mutex); 44 return ERR_PTR(-ENOTSUPP); 45 } 46 pr_debug("%s: Using map for %s\n", __func__, soc_ep_map->name); 47 } 48 mutex_unlock(&ep_map_mutex); 49 50 if (thread_id & K3_PSIL_DST_THREAD_ID_OFFSET && soc_ep_map->dst) { 51 /* check in destination thread map */ 52 for (i = 0; i < soc_ep_map->dst_count; i++) { 53 if (soc_ep_map->dst[i].thread_id == thread_id) 54 return &soc_ep_map->dst[i].ep_config; 55 } 56 } 57 58 thread_id &= ~K3_PSIL_DST_THREAD_ID_OFFSET; 59 if (soc_ep_map->src) { 60 for (i = 0; i < soc_ep_map->src_count; i++) { 61 if (soc_ep_map->src[i].thread_id == thread_id) 62 return &soc_ep_map->src[i].ep_config; 63 } 64 } 65 66 return ERR_PTR(-ENOENT); 67 } 68 EXPORT_SYMBOL_GPL(psil_get_ep_config); 69 70 int psil_set_new_ep_config(struct device *dev, const char *name, 71 struct psil_endpoint_config *ep_config) 72 { 73 struct psil_endpoint_config *dst_ep_config; 74 struct of_phandle_args dma_spec; 75 u32 thread_id; 76 int index; 77 78 if (!dev || !dev->of_node) 79 return -EINVAL; 80 81 index = of_property_match_string(dev->of_node, "dma-names", name); 82 if (index < 0) 83 return index; 84 85 if (of_parse_phandle_with_args(dev->of_node, "dmas", "#dma-cells", 86 index, &dma_spec)) 87 return -ENOENT; 88 89 thread_id = dma_spec.args[0]; 90 91 dst_ep_config = psil_get_ep_config(thread_id); 92 if (IS_ERR(dst_ep_config)) { 93 pr_err("PSIL: thread ID 0x%04x not defined in map\n", 94 thread_id); 95 of_node_put(dma_spec.np); 96 return PTR_ERR(dst_ep_config); 97 } 98 99 memcpy(dst_ep_config, ep_config, sizeof(*dst_ep_config)); 100 101 of_node_put(dma_spec.np); 102 return 0; 103 } 104 EXPORT_SYMBOL_GPL(psil_set_new_ep_config); 105 MODULE_LICENSE("GPL v2"); 106