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/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bus.h> 37 #include <sys/rman.h> 38 #include <sys/kernel.h> 39 #include <sys/lock.h> 40 #include <sys/module.h> 41 #include <sys/mutex.h> 42 #include <machine/bus.h> 43 44 #include <dev/ofw/ofw_bus.h> 45 #include <dev/ofw/ofw_bus_subr.h> 46 47 #include <arm64/coresight/coresight.h> 48 49 static int 50 coresight_fdt_get_ports(phandle_t dev_node, 51 struct coresight_platform_data *pdata) 52 { 53 phandle_t node, child; 54 pcell_t port_reg; 55 phandle_t xref; 56 char *name; 57 int ret; 58 phandle_t endpoint_child; 59 struct endpoint *endp; 60 61 child = ofw_bus_find_child(dev_node, "ports"); 62 if (child) 63 node = child; 64 else 65 node = dev_node; 66 67 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 68 ret = OF_getprop_alloc(child, "name", (void **)&name); 69 if (ret == -1) 70 continue; 71 72 if (strcasecmp(name, "port") || 73 strncasecmp(name, "port@", 6)) { 74 75 port_reg = -1; 76 OF_getencprop(child, "reg", (void *)&port_reg, 77 sizeof(port_reg)); 78 79 endpoint_child = ofw_bus_find_child(child, "endpoint"); 80 if (endpoint_child) { 81 if (OF_getencprop(endpoint_child, 82 "remote-endpoint", &xref, 83 sizeof(xref)) == -1) { 84 printf("failed\n"); 85 continue; 86 } 87 endp = malloc(sizeof(struct endpoint), 88 M_CORESIGHT, M_WAITOK | M_ZERO); 89 endp->my_node = endpoint_child; 90 endp->their_node = OF_node_from_xref(xref); 91 endp->dev_node = dev_node; 92 endp->reg = port_reg; 93 if (OF_getproplen(endpoint_child, 94 "slave-mode") >= 0) { 95 pdata->in_ports++; 96 endp->input = 1; 97 } else 98 pdata->out_ports++; 99 100 mtx_lock(&pdata->mtx_lock); 101 TAILQ_INSERT_TAIL(&pdata->endpoints, 102 endp, link); 103 mtx_unlock(&pdata->mtx_lock); 104 } 105 } 106 } 107 108 return (0); 109 } 110 111 static int 112 coresight_fdt_get_cpu(phandle_t node, 113 struct coresight_platform_data *pdata) 114 { 115 phandle_t cpu_node; 116 pcell_t xref; 117 pcell_t cpu_reg; 118 119 if (OF_getencprop(node, "cpu", &xref, sizeof(xref)) != -1) { 120 cpu_node = OF_node_from_xref(xref); 121 if (OF_getencprop(cpu_node, "reg", (void *)&cpu_reg, 122 sizeof(cpu_reg)) > 0) { 123 pdata->cpu = cpu_reg; 124 return (0); 125 } 126 } 127 128 return (-1); 129 } 130 131 struct coresight_platform_data * 132 coresight_fdt_get_platform_data(device_t dev) 133 { 134 struct coresight_platform_data *pdata; 135 phandle_t node; 136 137 node = ofw_bus_get_node(dev); 138 139 pdata = malloc(sizeof(struct coresight_platform_data), 140 M_CORESIGHT, M_WAITOK | M_ZERO); 141 pdata->bus_type = CORESIGHT_BUS_FDT; 142 143 mtx_init(&pdata->mtx_lock, "Coresight Platform Data", NULL, MTX_DEF); 144 TAILQ_INIT(&pdata->endpoints); 145 146 coresight_fdt_get_cpu(node, pdata); 147 coresight_fdt_get_ports(node, pdata); 148 149 if (bootverbose) 150 printf("Total ports: in %d out %d\n", 151 pdata->in_ports, pdata->out_ports); 152 153 return (pdata); 154 } 155