1 /* $NetBSD: sbgbus.c,v 1.12 2011/02/01 03:16:54 matt 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 1.12 2011/02/01 03:16:54 matt 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 <machine/locore.h> 45 #include <machine/sb1250/sb1250_regs.h> 46 #include <machine/sb1250/sb1250_genbus.h> 47 #include <sbmips/dev/sbobio/sbobiovar.h> 48 #include <sbmips/dev/sbgbus/sbgbusvar.h> 49 50 static int sbgbus_match(device_t, cfdata_t, void *); 51 static void sbgbus_attach(device_t, device_t, void *); 52 53 CFATTACH_DECL_NEW(sbgbus, 0, 54 sbgbus_match, sbgbus_attach, NULL, NULL); 55 56 static int sbgbussearch(device_t, cfdata_t, const int *, void *); 57 static int sbgbusprint(void *, const char *); 58 59 static int 60 sbgbus_match(device_t parent, cfdata_t match, void *aux) 61 { 62 struct sbobio_attach_args *sap = aux; 63 64 if (sap->sa_locs.sa_type != SBOBIO_DEVTYPE_GBUS) 65 return (0); 66 67 return 1; 68 } 69 70 static void 71 sbgbus_attach(device_t parent, device_t self, void *aux) 72 { 73 74 /* Configure children using indirect configuration. */ 75 config_search_ia(sbgbussearch, self, "sbgbus", NULL); 76 } 77 78 static int 79 sbgbusprint(void *aux, const char *pnp) 80 { 81 struct sbgbus_attach_args *sga = aux; 82 83 if (sga->sga_chipsel != SBGBUS_CHIPSEL_NONE) 84 aprint_normal(" chipsel %u", sga->sga_chipsel); 85 if (sga->sga_offset != 0) 86 aprint_normal(" offset 0x%x", sga->sga_offset); 87 if (sga->sga_intr[0] != SBGBUS_INTR_NONE) { 88 aprint_normal(" intr %u", sga->sga_intr[0]); 89 if (sga->sga_intr[1] != SBGBUS_INTR_NONE) { 90 aprint_normal(",%u", sga->sga_intr[1]); 91 } 92 } 93 return (UNCONF); 94 } 95 96 static int 97 sbgbussearch(device_t parent, cfdata_t cf, 98 const int *ldesc, void *aux) 99 { 100 struct sbgbus_attach_args sga; 101 int tryagain; 102 103 do { 104 /* Fill in sga */ 105 sga.sga_chipsel = cf->cf_loc[SBGBUSCF_CHIPSEL]; 106 sga.sga_offset = cf->cf_loc[SBGBUSCF_OFFSET]; 107 sga.sga_intr[0] = cf->cf_loc[SBGBUSCF_INTR]; 108 sga.sga_intr[1] = cf->cf_loc[SBGBUSCF_INTR_1]; 109 110 /* Some quick sanity checks. */ 111 if (sga.sga_intr[0] == SBGBUS_INTR_NONE && 112 sga.sga_intr[1] != SBGBUS_INTR_NONE) { 113 /* XXX probably should print */ 114 return (0); 115 } 116 if (sga.sga_chipsel == SBGBUS_CHIPSEL_NONE && 117 sga.sga_offset != 0) { 118 /* XXX probably should print */ 119 return (0); 120 } 121 if (sga.sga_chipsel >= IO_EXT_CFG_COUNT) { 122 /* XXX probably should print */ 123 return (0); 124 } 125 126 /* XXX check for PCMCIA. */ 127 128 if (sga.sga_chipsel == SBGBUS_CHIPSEL_NONE) { 129 sga.sga_startphys = 0; 130 sga.sga_size = 0; 131 } else { 132 uint64_t rv; 133 134 rv = mips3_ld((volatile uint64_t *)MIPS_PHYS_TO_KSEG1( 135 A_IO_EXT_CS_BASE(sga.sga_chipsel) + 136 R_IO_EXT_START_ADDR)); 137 sga.sga_startphys = (rv & M_IO_START_ADDR) << S_IO_ADDRBASE; 138 rv = mips3_ld((volatile uint64_t *)MIPS_PHYS_TO_KSEG1( 139 A_IO_EXT_CS_BASE(sga.sga_chipsel) + 140 R_IO_EXT_MULT_SIZE)); 141 sga.sga_size = (rv & M_IO_MULT_SIZE) << S_IO_REGSIZE; 142 143 /* Make sure that region is enabled. */ 144 if (sga.sga_size == 0 || 145 sga.sga_startphys < A_PHYS_GENBUS || 146 sga.sga_startphys >= A_PHYS_GENBUS_END) 147 return (0); 148 149 /* Report to child only the space they can access. */ 150 if (sga.sga_startphys + sga.sga_size > A_PHYS_GENBUS_END) 151 sga.sga_size = A_PHYS_GENBUS_END - sga.sga_startphys; 152 } 153 154 tryagain = 0; 155 if (config_match(parent, cf, &sga) > 0) { 156 config_attach(parent, cf, &sga, sbgbusprint); 157 tryagain = (cf->cf_fstate == FSTATE_STAR); 158 } 159 } while (tryagain); 160 161 return (0); 162 } 163