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 port_reg = -1; 75 OF_getencprop(child, "reg", (void *)&port_reg, 76 sizeof(port_reg)); 77 78 endpoint_child = ofw_bus_find_child(child, "endpoint"); 79 if (endpoint_child) { 80 if (OF_getencprop(endpoint_child, 81 "remote-endpoint", &xref, 82 sizeof(xref)) == -1) { 83 printf("failed\n"); 84 continue; 85 } 86 endp = malloc(sizeof(struct endpoint), 87 M_CORESIGHT, M_WAITOK | M_ZERO); 88 endp->my_node = endpoint_child; 89 endp->their_node = OF_node_from_xref(xref); 90 endp->dev_node = dev_node; 91 endp->reg = port_reg; 92 if (OF_getproplen(endpoint_child, 93 "slave-mode") >= 0) { 94 pdata->in_ports++; 95 endp->input = 1; 96 } else 97 pdata->out_ports++; 98 99 mtx_lock(&pdata->mtx_lock); 100 TAILQ_INSERT_TAIL(&pdata->endpoints, 101 endp, link); 102 mtx_unlock(&pdata->mtx_lock); 103 } 104 } 105 } 106 107 return (0); 108 } 109 110 static int 111 coresight_fdt_get_cpu(phandle_t node, 112 struct coresight_platform_data *pdata) 113 { 114 phandle_t cpu_node; 115 pcell_t xref; 116 pcell_t cpu_reg; 117 118 if (OF_getencprop(node, "cpu", &xref, sizeof(xref)) != -1) { 119 cpu_node = OF_node_from_xref(xref); 120 if (OF_getencprop(cpu_node, "reg", (void *)&cpu_reg, 121 sizeof(cpu_reg)) > 0) { 122 pdata->cpu = cpu_reg; 123 return (0); 124 } 125 } 126 127 return (-1); 128 } 129 130 struct coresight_platform_data * 131 coresight_fdt_get_platform_data(device_t dev) 132 { 133 struct coresight_platform_data *pdata; 134 phandle_t node; 135 136 node = ofw_bus_get_node(dev); 137 138 pdata = malloc(sizeof(struct coresight_platform_data), 139 M_CORESIGHT, M_WAITOK | M_ZERO); 140 pdata->bus_type = CORESIGHT_BUS_FDT; 141 142 mtx_init(&pdata->mtx_lock, "Coresight Platform Data", NULL, MTX_DEF); 143 TAILQ_INIT(&pdata->endpoints); 144 145 coresight_fdt_get_cpu(node, pdata); 146 coresight_fdt_get_ports(node, pdata); 147 148 if (bootverbose) 149 printf("Total ports: in %d out %d\n", 150 pdata->in_ports, pdata->out_ports); 151 152 return (pdata); 153 } 154