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/device.h> 9 #include <linux/init.h> 10 #include <linux/mutex.h> 11 #include <linux/of.h> 12 #include <linux/sys_soc.h> 13 14 #include "k3-psil-priv.h" 15 16 static DEFINE_MUTEX(ep_map_mutex); 17 static const struct psil_ep_map *soc_ep_map; 18 19 static const struct soc_device_attribute k3_soc_devices[] = { 20 { .family = "AM65X", .data = &am654_ep_map }, 21 { .family = "J721E", .data = &j721e_ep_map }, 22 { .family = "J7200", .data = &j7200_ep_map }, 23 { .family = "AM64X", .data = &am64_ep_map }, 24 { /* sentinel */ } 25 }; 26 27 struct psil_endpoint_config *psil_get_ep_config(u32 thread_id) 28 { 29 int i; 30 31 mutex_lock(&ep_map_mutex); 32 if (!soc_ep_map) { 33 const struct soc_device_attribute *soc; 34 35 soc = soc_device_match(k3_soc_devices); 36 if (soc) { 37 soc_ep_map = soc->data; 38 } else { 39 pr_err("PSIL: No compatible machine found for map\n"); 40 mutex_unlock(&ep_map_mutex); 41 return ERR_PTR(-ENOTSUPP); 42 } 43 pr_debug("%s: Using map for %s\n", __func__, soc_ep_map->name); 44 } 45 mutex_unlock(&ep_map_mutex); 46 47 if (thread_id & K3_PSIL_DST_THREAD_ID_OFFSET && soc_ep_map->dst) { 48 /* check in destination thread map */ 49 for (i = 0; i < soc_ep_map->dst_count; i++) { 50 if (soc_ep_map->dst[i].thread_id == thread_id) 51 return &soc_ep_map->dst[i].ep_config; 52 } 53 } 54 55 thread_id &= ~K3_PSIL_DST_THREAD_ID_OFFSET; 56 if (soc_ep_map->src) { 57 for (i = 0; i < soc_ep_map->src_count; i++) { 58 if (soc_ep_map->src[i].thread_id == thread_id) 59 return &soc_ep_map->src[i].ep_config; 60 } 61 } 62 63 return ERR_PTR(-ENOENT); 64 } 65 EXPORT_SYMBOL_GPL(psil_get_ep_config); 66 67 int psil_set_new_ep_config(struct device *dev, const char *name, 68 struct psil_endpoint_config *ep_config) 69 { 70 struct psil_endpoint_config *dst_ep_config; 71 struct of_phandle_args dma_spec; 72 u32 thread_id; 73 int index; 74 75 if (!dev || !dev->of_node) 76 return -EINVAL; 77 78 index = of_property_match_string(dev->of_node, "dma-names", name); 79 if (index < 0) 80 return index; 81 82 if (of_parse_phandle_with_args(dev->of_node, "dmas", "#dma-cells", 83 index, &dma_spec)) 84 return -ENOENT; 85 86 thread_id = dma_spec.args[0]; 87 88 dst_ep_config = psil_get_ep_config(thread_id); 89 if (IS_ERR(dst_ep_config)) { 90 pr_err("PSIL: thread ID 0x%04x not defined in map\n", 91 thread_id); 92 of_node_put(dma_spec.np); 93 return PTR_ERR(dst_ep_config); 94 } 95 96 memcpy(dst_ep_config, ep_config, sizeof(*dst_ep_config)); 97 98 of_node_put(dma_spec.np); 99 return 0; 100 } 101 EXPORT_SYMBOL_GPL(psil_set_new_ep_config); 102