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