1 /* $NetBSD: sbgbus.c,v 1.15 2021/08/07 16:18:59 thorpej Exp $ */
2
3 /*
4 * Copyright 2000, 2001
5 * Broadcom Corporation. All rights reserved.
6 *
7 * This software is furnished under license and may be used and copied only
8 * in accordance with the following terms and conditions. Subject to these
9 * conditions, you may download, copy, install, use, modify and distribute
10 * modified or unmodified copies of this software in source and/or binary
11 * form. No title or ownership is transferred hereby.
12 *
13 * 1) Any source code used, modified or distributed must reproduce and
14 * retain this copyright notice and list of conditions as they appear in
15 * the source file.
16 *
17 * 2) No right is granted to use any trade name, trademark, or logo of
18 * Broadcom Corporation. The "Broadcom Corporation" name may not be
19 * used to endorse or promote products derived from this software
20 * without the prior written permission of Broadcom Corporation.
21 *
22 * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
25 * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
26 * FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
27 * LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
32 * OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 __KERNEL_RCSID(0, "$NetBSD: sbgbus.c,v 1.15 2021/08/07 16:18:59 thorpej Exp $");
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/device.h>
41
42 #include "ioconf.h"
43
44 #include <mips/locore.h>
45
46 #include <sbmips/sb1250/sb1250_regs.h>
47 #include <sbmips/sb1250/sb1250_genbus.h>
48
49 #include <sbmips/dev/sbobio/sbobiovar.h>
50 #include <sbmips/dev/sbgbus/sbgbusvar.h>
51
52 static int sbgbus_match(device_t, cfdata_t, void *);
53 static void sbgbus_attach(device_t, device_t, void *);
54
55 CFATTACH_DECL_NEW(sbgbus, 0,
56 sbgbus_match, sbgbus_attach, NULL, NULL);
57
58 static int sbgbussearch(device_t, cfdata_t, const int *, void *);
59 static int sbgbusprint(void *, const char *);
60
61 static int
sbgbus_match(device_t parent,cfdata_t match,void * aux)62 sbgbus_match(device_t parent, cfdata_t match, void *aux)
63 {
64 struct sbobio_attach_args *sap = aux;
65
66 if (sap->sa_locs.sa_type != SBOBIO_DEVTYPE_GBUS)
67 return (0);
68
69 return 1;
70 }
71
72 static void
sbgbus_attach(device_t parent,device_t self,void * aux)73 sbgbus_attach(device_t parent, device_t self, void *aux)
74 {
75
76 /* Configure children using indirect configuration. */
77 config_search(self, NULL,
78 CFARGS(.search = sbgbussearch));
79 }
80
81 static int
sbgbusprint(void * aux,const char * pnp)82 sbgbusprint(void *aux, const char *pnp)
83 {
84 struct sbgbus_attach_args *sga = aux;
85
86 if (sga->sga_chipsel != SBGBUS_CHIPSEL_NONE)
87 aprint_normal(" chipsel %u", sga->sga_chipsel);
88 if (sga->sga_offset != 0)
89 aprint_normal(" offset 0x%x", sga->sga_offset);
90 if (sga->sga_intr[0] != SBGBUS_INTR_NONE) {
91 aprint_normal(" intr %u", sga->sga_intr[0]);
92 if (sga->sga_intr[1] != SBGBUS_INTR_NONE) {
93 aprint_normal(",%u", sga->sga_intr[1]);
94 }
95 }
96 return (UNCONF);
97 }
98
99 static int
sbgbussearch(device_t parent,cfdata_t cf,const int * ldesc,void * aux)100 sbgbussearch(device_t parent, cfdata_t cf,
101 const int *ldesc, void *aux)
102 {
103 struct sbgbus_attach_args sga;
104 int tryagain;
105
106 do {
107 /* Fill in sga */
108 sga.sga_chipsel = cf->cf_loc[SBGBUSCF_CHIPSEL];
109 sga.sga_offset = cf->cf_loc[SBGBUSCF_OFFSET];
110 sga.sga_intr[0] = cf->cf_loc[SBGBUSCF_INTR];
111 sga.sga_intr[1] = cf->cf_loc[SBGBUSCF_INTR_1];
112
113 /* Some quick sanity checks. */
114 if (sga.sga_intr[0] == SBGBUS_INTR_NONE &&
115 sga.sga_intr[1] != SBGBUS_INTR_NONE) {
116 /* XXX probably should print */
117 return (0);
118 }
119 if (sga.sga_chipsel == SBGBUS_CHIPSEL_NONE &&
120 sga.sga_offset != 0) {
121 /* XXX probably should print */
122 return (0);
123 }
124 if (sga.sga_chipsel >= IO_EXT_CFG_COUNT) {
125 /* XXX probably should print */
126 return (0);
127 }
128
129 /* XXX check for PCMCIA. */
130
131 if (sga.sga_chipsel == SBGBUS_CHIPSEL_NONE) {
132 sga.sga_startphys = 0;
133 sga.sga_size = 0;
134 } else {
135 uint64_t rv;
136
137 rv = mips3_ld((volatile uint64_t *)MIPS_PHYS_TO_KSEG1(
138 A_IO_EXT_CS_BASE(sga.sga_chipsel) +
139 R_IO_EXT_START_ADDR));
140 sga.sga_startphys = (rv & M_IO_START_ADDR) << S_IO_ADDRBASE;
141 rv = mips3_ld((volatile uint64_t *)MIPS_PHYS_TO_KSEG1(
142 A_IO_EXT_CS_BASE(sga.sga_chipsel) +
143 R_IO_EXT_MULT_SIZE));
144 sga.sga_size = (rv & M_IO_MULT_SIZE) << S_IO_REGSIZE;
145
146 /* Make sure that region is enabled. */
147 if (sga.sga_size == 0 ||
148 sga.sga_startphys < A_PHYS_GENBUS ||
149 sga.sga_startphys >= A_PHYS_GENBUS_END)
150 return (0);
151
152 /* Report to child only the space they can access. */
153 if (sga.sga_startphys + sga.sga_size > A_PHYS_GENBUS_END)
154 sga.sga_size = A_PHYS_GENBUS_END - sga.sga_startphys;
155 }
156
157 tryagain = 0;
158 if (config_probe(parent, cf, &sga)) {
159 config_attach(parent, cf, &sga, sbgbusprint, CFARGS_NONE);
160 tryagain = (cf->cf_fstate == FSTATE_STAR);
161 }
162 } while (tryagain);
163
164 return (0);
165 }
166