1 /*- 2 * Copyright (c) 2018-2020 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * This software was developed by SRI International and the University of 6 * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237 7 * ("CTSRD"), as part of the DARPA CRASH research programme. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/bus.h> 34 #include <sys/rman.h> 35 #include <sys/kernel.h> 36 #include <sys/lock.h> 37 #include <sys/module.h> 38 #include <sys/mutex.h> 39 #include <machine/bus.h> 40 41 #include <dev/ofw/ofw_bus.h> 42 #include <dev/ofw/ofw_bus_subr.h> 43 44 #include <arm64/coresight/coresight.h> 45 46 static int 47 coresight_fdt_get_ports(phandle_t dev_node, 48 struct coresight_platform_data *pdata) 49 { 50 phandle_t node, child; 51 pcell_t port_reg; 52 phandle_t xref; 53 char *name; 54 int ret; 55 phandle_t endpoint_child; 56 struct endpoint *endp; 57 58 child = ofw_bus_find_child(dev_node, "ports"); 59 if (child) 60 node = child; 61 else 62 node = dev_node; 63 64 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 65 ret = OF_getprop_alloc(child, "name", (void **)&name); 66 if (ret == -1) 67 continue; 68 69 if (strcasecmp(name, "port") || 70 strncasecmp(name, "port@", 6)) { 71 port_reg = -1; 72 OF_getencprop(child, "reg", (void *)&port_reg, 73 sizeof(port_reg)); 74 75 endpoint_child = ofw_bus_find_child(child, "endpoint"); 76 if (endpoint_child) { 77 if (OF_getencprop(endpoint_child, 78 "remote-endpoint", &xref, 79 sizeof(xref)) == -1) { 80 printf("failed\n"); 81 continue; 82 } 83 endp = malloc(sizeof(struct endpoint), 84 M_CORESIGHT, M_WAITOK | M_ZERO); 85 endp->my_node = endpoint_child; 86 endp->their_node = OF_node_from_xref(xref); 87 endp->dev_node = dev_node; 88 endp->reg = port_reg; 89 if (OF_getproplen(endpoint_child, 90 "slave-mode") >= 0) { 91 pdata->in_ports++; 92 endp->input = 1; 93 } else 94 pdata->out_ports++; 95 96 mtx_lock(&pdata->mtx_lock); 97 TAILQ_INSERT_TAIL(&pdata->endpoints, 98 endp, link); 99 mtx_unlock(&pdata->mtx_lock); 100 } 101 } 102 } 103 104 return (0); 105 } 106 107 static int 108 coresight_fdt_get_cpu(phandle_t node, 109 struct coresight_platform_data *pdata) 110 { 111 phandle_t cpu_node; 112 pcell_t xref; 113 pcell_t cpu_reg; 114 115 if (OF_getencprop(node, "cpu", &xref, sizeof(xref)) != -1) { 116 cpu_node = OF_node_from_xref(xref); 117 if (OF_getencprop(cpu_node, "reg", (void *)&cpu_reg, 118 sizeof(cpu_reg)) > 0) { 119 pdata->cpu = cpu_reg; 120 return (0); 121 } 122 } 123 124 return (-1); 125 } 126 127 struct coresight_platform_data * 128 coresight_fdt_get_platform_data(device_t dev) 129 { 130 struct coresight_platform_data *pdata; 131 phandle_t node; 132 133 node = ofw_bus_get_node(dev); 134 135 pdata = malloc(sizeof(struct coresight_platform_data), 136 M_CORESIGHT, M_WAITOK | M_ZERO); 137 pdata->bus_type = CORESIGHT_BUS_FDT; 138 139 mtx_init(&pdata->mtx_lock, "Coresight Platform Data", NULL, MTX_DEF); 140 TAILQ_INIT(&pdata->endpoints); 141 142 coresight_fdt_get_cpu(node, pdata); 143 coresight_fdt_get_ports(node, pdata); 144 145 if (bootverbose) 146 printf("Total ports: in %d out %d\n", 147 pdata->in_ports, pdata->out_ports); 148 149 return (pdata); 150 } 151