bcm53xx_idm.c revision 1.1
1 /*- 2 * Copyright (c) 2012 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Matt Thomas of 3am Software Foundry. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include "opt_broadcom.h" 31 #include "locators.h" 32 33 #define CRU_PRIVATE 34 #define IDM_PRIVATE 35 36 #include <sys/cdefs.h> 37 38 __KERNEL_RCSID(1, "$NetBSD: bcm53xx_idm.c,v 1.1 2012/09/01 00:04:44 matt Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/bus.h> 42 #include <sys/device.h> 43 #include <sys/intr.h> 44 #include <sys/systm.h> 45 46 #include <arm/mainbus/mainbus.h> 47 48 #include <arm/broadcom/bcm53xx_reg.h> 49 #include <arm/broadcom/bcm53xx_var.h> 50 51 struct idm_info { 52 bus_size_t idm_offset; 53 const char *idm_name; 54 int idm_port; 55 bool (*idm_unreset)(bus_space_tag_t, bus_space_handle_t, 56 const struct idm_info *); 57 }; 58 59 static bool 60 bcmeth_unreset(bus_space_tag_t bst, bus_space_handle_t bsh, 61 const struct idm_info *idm) 62 { 63 /* 64 * To enable any GMAC, we must enable all off them. 65 */ 66 static const bus_size_t regoff[] = { 67 IDM_BASE + IDM_AMAC0_BASE + IDM_RESET_CONTROL, 68 IDM_BASE + IDM_AMAC1_BASE + IDM_RESET_CONTROL, 69 IDM_BASE + IDM_AMAC2_BASE + IDM_RESET_CONTROL, 70 IDM_BASE + IDM_AMAC3_BASE + IDM_RESET_CONTROL, 71 }; 72 static bool bcmeth_init_done; 73 if (!bcmeth_init_done) { 74 for (size_t idx = 0; idx < __arraycount(regoff); idx++) { 75 bus_space_write_4(bst, bsh, regoff[idx], 0); 76 } 77 bcmeth_init_done = true; 78 } 79 return true; 80 } 81 82 static bool 83 bcmccb_idm_unreset(bus_space_tag_t bst, bus_space_handle_t bsh, 84 const struct idm_info *idm) 85 { 86 if (idm->idm_offset == 0) 87 return true; 88 89 /* 90 * If the device might be in reset, let's try to take it out of it. 91 */ 92 bus_size_t o = IDM_BASE + idm->idm_offset + IDM_RESET_CONTROL; 93 uint32_t v = bus_space_read_4(bst, bsh, o); 94 if (v & 1) { 95 v &= ~1; 96 bus_space_write_4(bst, bsh, o, v); 97 } 98 return true; 99 } 100 101 static bool 102 bcmpax2_idm_unreset(bus_space_tag_t bst, bus_space_handle_t bsh, 103 const struct idm_info *idm) 104 { 105 uint32_t v = bus_space_read_4(bst, bsh, CRU_BASE + CRU_STRAPS_CONTROL); 106 107 if (v & STRAP_USB3_SEL) 108 return false; 109 110 return bcmccb_idm_unreset(bst, bsh, idm); 111 } 112 113 static bool 114 bcmxhci_idm_unreset(bus_space_tag_t bst, bus_space_handle_t bsh, 115 const struct idm_info *idm) 116 { 117 uint32_t v = bus_space_read_4(bst, bsh, CRU_BASE + CRU_STRAPS_CONTROL); 118 119 if ((v & STRAP_USB3_SEL) == 0) 120 return false; 121 122 return bcmccb_idm_unreset(bst, bsh, idm); 123 } 124 125 static const struct idm_info bcm53xx_idm_info[] = { 126 { 0, "bcmi2c", BCMCCBCF_PORT_DEFAULT, bcmccb_idm_unreset }, 127 { 0, "bcmmdio", BCMCCBCF_PORT_DEFAULT, bcmccb_idm_unreset }, 128 { 0, "bcmrng", BCMCCBCF_PORT_DEFAULT, bcmccb_idm_unreset }, 129 { IDM_PCIE_M0_BASE, "bcmpax", 0, bcmccb_idm_unreset }, 130 { IDM_PCIE_M1_BASE, "bcmpax", 1, bcmccb_idm_unreset }, 131 { IDM_PCIE_M2_BASE, "bcmpax", 2, bcmpax2_idm_unreset }, 132 { IDM_AMAC0_BASE, "bcmeth", 0, bcmeth_unreset }, 133 { IDM_AMAC1_BASE, "bcmeth", 1, bcmeth_unreset }, 134 { IDM_AMAC2_BASE, "bcmeth", 2, bcmeth_unreset }, 135 { IDM_AMAC3_BASE, "bcmeth", 3, bcmeth_unreset }, 136 { IDM_USB3_BASE, "xhci", BCMCCBCF_PORT_DEFAULT, bcmxhci_idm_unreset }, 137 { IDM_SDIO_BASE, "sdhc", BCMCCBCF_PORT_DEFAULT, bcmccb_idm_unreset }, 138 { IDM_USB2_BASE, "bcmusb", BCMCCBCF_PORT_DEFAULT, bcmccb_idm_unreset }, 139 }; 140 141 static const struct idm_info * 142 bcmccb_idm_lookup(const struct bcm_locators * const loc) 143 { 144 const struct idm_info *idm = bcm53xx_idm_info; 145 for (size_t i = 0; i < __arraycount(bcm53xx_idm_info); i++, idm++) { 146 if (strcmp(idm->idm_name, loc->loc_name) == 0 147 && idm->idm_port == loc->loc_port) { 148 return idm; 149 } 150 } 151 return NULL; 152 } 153 154 bool 155 bcm53xx_idm_device_init(const struct bcm_locators *loc, bus_space_tag_t bst, 156 bus_space_handle_t bsh) 157 { 158 const struct idm_info * const idm = bcmccb_idm_lookup(loc); 159 if (idm == NULL) 160 return false; 161 162 /* 163 * If the device might be in reset, let's try to take it out of it. 164 */ 165 return (*idm->idm_unreset)(bst, bsh, idm); 166 } 167
Indexes created Tue Sep 30 06:09:59 GMT 2025