sbgbus.c revision 1.14
1 /* $NetBSD: sbgbus.c,v 1.14 2021/04/24 23:36:43 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 1.14 2021/04/24 23:36:43 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 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 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 CFARG_SEARCH, sbgbussearch, 79 CFARG_EOL); 80 } 81 82 static int 83 sbgbusprint(void *aux, const char *pnp) 84 { 85 struct sbgbus_attach_args *sga = aux; 86 87 if (sga->sga_chipsel != SBGBUS_CHIPSEL_NONE) 88 aprint_normal(" chipsel %u", sga->sga_chipsel); 89 if (sga->sga_offset != 0) 90 aprint_normal(" offset 0x%x", sga->sga_offset); 91 if (sga->sga_intr[0] != SBGBUS_INTR_NONE) { 92 aprint_normal(" intr %u", sga->sga_intr[0]); 93 if (sga->sga_intr[1] != SBGBUS_INTR_NONE) { 94 aprint_normal(",%u", sga->sga_intr[1]); 95 } 96 } 97 return (UNCONF); 98 } 99 100 static int 101 sbgbussearch(device_t parent, cfdata_t cf, 102 const int *ldesc, void *aux) 103 { 104 struct sbgbus_attach_args sga; 105 int tryagain; 106 107 do { 108 /* Fill in sga */ 109 sga.sga_chipsel = cf->cf_loc[SBGBUSCF_CHIPSEL]; 110 sga.sga_offset = cf->cf_loc[SBGBUSCF_OFFSET]; 111 sga.sga_intr[0] = cf->cf_loc[SBGBUSCF_INTR]; 112 sga.sga_intr[1] = cf->cf_loc[SBGBUSCF_INTR_1]; 113 114 /* Some quick sanity checks. */ 115 if (sga.sga_intr[0] == SBGBUS_INTR_NONE && 116 sga.sga_intr[1] != SBGBUS_INTR_NONE) { 117 /* XXX probably should print */ 118 return (0); 119 } 120 if (sga.sga_chipsel == SBGBUS_CHIPSEL_NONE && 121 sga.sga_offset != 0) { 122 /* XXX probably should print */ 123 return (0); 124 } 125 if (sga.sga_chipsel >= IO_EXT_CFG_COUNT) { 126 /* XXX probably should print */ 127 return (0); 128 } 129 130 /* XXX check for PCMCIA. */ 131 132 if (sga.sga_chipsel == SBGBUS_CHIPSEL_NONE) { 133 sga.sga_startphys = 0; 134 sga.sga_size = 0; 135 } else { 136 uint64_t rv; 137 138 rv = mips3_ld((volatile uint64_t *)MIPS_PHYS_TO_KSEG1( 139 A_IO_EXT_CS_BASE(sga.sga_chipsel) + 140 R_IO_EXT_START_ADDR)); 141 sga.sga_startphys = (rv & M_IO_START_ADDR) << S_IO_ADDRBASE; 142 rv = mips3_ld((volatile uint64_t *)MIPS_PHYS_TO_KSEG1( 143 A_IO_EXT_CS_BASE(sga.sga_chipsel) + 144 R_IO_EXT_MULT_SIZE)); 145 sga.sga_size = (rv & M_IO_MULT_SIZE) << S_IO_REGSIZE; 146 147 /* Make sure that region is enabled. */ 148 if (sga.sga_size == 0 || 149 sga.sga_startphys < A_PHYS_GENBUS || 150 sga.sga_startphys >= A_PHYS_GENBUS_END) 151 return (0); 152 153 /* Report to child only the space they can access. */ 154 if (sga.sga_startphys + sga.sga_size > A_PHYS_GENBUS_END) 155 sga.sga_size = A_PHYS_GENBUS_END - sga.sga_startphys; 156 } 157 158 tryagain = 0; 159 if (config_probe(parent, cf, &sga)) { 160 config_attach(parent, cf, &sga, sbgbusprint, CFARG_EOL); 161 tryagain = (cf->cf_fstate == FSTATE_STAR); 162 } 163 } while (tryagain); 164 165 return (0); 166 } 167
Indexes created Mon Sep 29 21:09:56 GMT 2025