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 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 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