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 1.4 2024/02/16 15:11:17 skrll 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
bcmeth_unreset(bus_space_tag_t bst,bus_space_handle_t bsh,const struct idm_info * idm)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,
68 IDM_BASE + IDM_AMAC1_BASE,
69 IDM_BASE + IDM_AMAC2_BASE,
70 IDM_BASE + IDM_AMAC3_BASE,
71 };
72 static bool bcmeth_init_done;
73 if (!bcmeth_init_done) {
74 for (size_t idx = 0; idx < __arraycount(regoff); idx++) {
75 const bus_size_t off = regoff[idx];
76 bus_space_write_4(bst, bsh, off + IDM_RESET_CONTROL, 0);
77 uint32_t v = bus_space_read_4(bst, bsh,
78 off + IDM_IO_CONTROL_DIRECT);
79 /*
80 * Clear read-allocate and write-allocate bits from
81 * ACP cache access so we don't pollute the caches with
82 * DMA traffic.
83 */
84 v &= ~IO_CONTROL_DIRECT_ARCACHE;
85 v &= ~IO_CONTROL_DIRECT_AWCACHE;
86 #if 0
87 v |= __SHIFTIN(AXCACHE_WA, IO_CONTROL_DIRECT_ARCACHE);
88 v |= __SHIFTIN(AXCACHE_RA, IO_CONTROL_DIRECT_AWCACHE);
89 #endif
90 v |= __SHIFTIN(AXCACHE_C|AXCACHE_B, IO_CONTROL_DIRECT_ARCACHE);
91 v |= __SHIFTIN(AXCACHE_C|AXCACHE_B, IO_CONTROL_DIRECT_AWCACHE);
92 /*
93 * These are the default but make sure they are
94 * properly set.
95 */
96 v |= __SHIFTIN(0x1F, IO_CONTROL_DIRECT_ARUSER);
97 v |= __SHIFTIN(0x1F, IO_CONTROL_DIRECT_AWUSER);
98 v |= IO_CONTROL_DIRECT_CLK_250_SEL;
99 v |= IO_CONTROL_DIRECT_DIRECT_GMII_MODE;
100 v |= IO_CONTROL_DIRECT_SOURCE_SYNC_MODE_EN;
101 v |= IO_CONTROL_DIRECT_CLK_GATING_EN;
102
103 bus_space_write_4(bst, bsh, off + IDM_IO_CONTROL_DIRECT,
104 v);
105 }
106 bcmeth_init_done = true;
107 }
108 return true;
109 }
110
111 static bool
bcmccb_idm_unreset(bus_space_tag_t bst,bus_space_handle_t bsh,const struct idm_info * idm)112 bcmccb_idm_unreset(bus_space_tag_t bst, bus_space_handle_t bsh,
113 const struct idm_info *idm)
114 {
115 if (idm->idm_offset == 0)
116 return true;
117
118 /*
119 * If the device might be in reset, let's try to take it out of it.
120 */
121 bus_size_t o = IDM_BASE + idm->idm_offset + IDM_RESET_CONTROL;
122 uint32_t v = bus_space_read_4(bst, bsh, o);
123 if (v & 1) {
124 v &= ~1;
125 bus_space_write_4(bst, bsh, o, v);
126 }
127 return true;
128 }
129
130 static bool
bcmpax2_idm_unreset(bus_space_tag_t bst,bus_space_handle_t bsh,const struct idm_info * idm)131 bcmpax2_idm_unreset(bus_space_tag_t bst, bus_space_handle_t bsh,
132 const struct idm_info *idm)
133 {
134 uint32_t v = bus_space_read_4(bst, bsh, CRU_BASE + CRU_STRAPS_CONTROL);
135
136 if (v & STRAP_USB3_SEL)
137 return false;
138
139 return bcmccb_idm_unreset(bst, bsh, idm);
140 }
141
142 static bool
bcmxhci_idm_unreset(bus_space_tag_t bst,bus_space_handle_t bsh,const struct idm_info * idm)143 bcmxhci_idm_unreset(bus_space_tag_t bst, bus_space_handle_t bsh,
144 const struct idm_info *idm)
145 {
146 uint32_t v = bus_space_read_4(bst, bsh, CRU_BASE + CRU_STRAPS_CONTROL);
147
148 if ((v & STRAP_USB3_SEL) == 0)
149 return false;
150
151 return bcmccb_idm_unreset(bst, bsh, idm);
152 }
153
154 static const struct idm_info bcm53xx_idm_info[] = {
155 { 0, "bcmi2c", BCMCCBCF_PORT_DEFAULT, bcmccb_idm_unreset },
156 { 0, "bcmmdio", BCMCCBCF_PORT_DEFAULT, bcmccb_idm_unreset },
157 { 0, "bcmrng", BCMCCBCF_PORT_DEFAULT, bcmccb_idm_unreset },
158 { IDM_PCIE_M0_BASE, "bcmpax", 0, bcmccb_idm_unreset },
159 { IDM_PCIE_M1_BASE, "bcmpax", 1, bcmccb_idm_unreset },
160 { IDM_PCIE_M2_BASE, "bcmpax", 2, bcmpax2_idm_unreset },
161 { IDM_AMAC0_BASE, "bcmeth", 0, bcmeth_unreset },
162 { IDM_AMAC1_BASE, "bcmeth", 1, bcmeth_unreset },
163 { IDM_AMAC2_BASE, "bcmeth", 2, bcmeth_unreset },
164 { IDM_AMAC3_BASE, "bcmeth", 3, bcmeth_unreset },
165 { IDM_USB3_BASE, "xhci", BCMCCBCF_PORT_DEFAULT, bcmxhci_idm_unreset },
166 { IDM_SDIO_BASE, "sdhc", BCMCCBCF_PORT_DEFAULT, bcmccb_idm_unreset },
167 { IDM_USB2_BASE, "bcmusb", BCMCCBCF_PORT_DEFAULT, bcmccb_idm_unreset },
168 };
169
170 static const struct idm_info *
bcmccb_idm_lookup(const struct bcm_locators * const loc)171 bcmccb_idm_lookup(const struct bcm_locators * const loc)
172 {
173 const struct idm_info *idm = bcm53xx_idm_info;
174 for (size_t i = 0; i < __arraycount(bcm53xx_idm_info); i++, idm++) {
175 if (strcmp(idm->idm_name, loc->loc_name) == 0
176 && idm->idm_port == loc->loc_port) {
177 return idm;
178 }
179 }
180 return NULL;
181 }
182
183 bool
bcm53xx_idm_device_init(const struct bcm_locators * loc,bus_space_tag_t bst,bus_space_handle_t bsh)184 bcm53xx_idm_device_init(const struct bcm_locators *loc, bus_space_tag_t bst,
185 bus_space_handle_t bsh)
186 {
187 const struct idm_info * const idm = bcmccb_idm_lookup(loc);
188 if (idm == NULL)
189 return false;
190
191 /*
192 * If the device might be in reset, let's try to take it out of it.
193 */
194 return (*idm->idm_unreset)(bst, bsh, idm);
195 }
196