Home | History | Annotate | Line # | Download | only in dev
sbgbus.c revision 1.6 
      1 /* $NetBSD: sbgbus.c,v 1.6 2003/02/07 17:38:49 cgd 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/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/device.h>
     38 
     39 #include <machine/locore.h>
     40 #include <machine/sb1250/sb1250_regs.h>
     41 #include <machine/sb1250/sb1250_genbus.h>
     42 #include <sbmips/dev/sbobio/sbobiovar.h>
     43 #include <sbmips/dev/sbgbus/sbgbusvar.h>
     44 
     45 extern struct cfdriver sbgbus_cd;
     46 
     47 static int	sbgbus_match(struct device *, struct cfdata *, void *);
     48 static void	sbgbus_attach(struct device *, struct device *, void *);
     49 
     50 CFATTACH_DECL(sbgbus, sizeof(struct device),
     51     sbgbus_match, sbgbus_attach, NULL, NULL);
     52 
     53 static int	sbgbussearch(struct device *, struct cfdata *, void *);
     54 static int	sbgbusprint(void *, const char *);
     55 
     56 static int
     57 sbgbus_match(struct device *parent, struct cfdata *match, void *aux)
     58 {
     59 	struct sbobio_attach_args *sap = aux;
     60 
     61 	if (sap->sa_locs.sa_type != SBOBIO_DEVTYPE_GBUS)
     62 		return (0);
     63 
     64 	return 1;
     65 }
     66 
     67 static void
     68 sbgbus_attach(struct device *parent, struct device *self, void *aux)
     69 {
     70 
     71 	/* Configure children using indirect configuration. */
     72 	config_search(sbgbussearch, self, NULL);
     73 }
     74 
     75 static int
     76 sbgbusprint(void *aux, const char *pnp)
     77 {
     78 	struct sbgbus_attach_args *sga = aux;
     79 
     80 	if (sga->sga_chipsel != SBGBUS_CHIPSEL_NONE)
     81 		aprint_normal(" chipsel %u", sga->sga_chipsel);
     82 	if (sga->sga_offset != 0)
     83 		aprint_normal(" offset 0x%x", sga->sga_offset);
     84 	if (sga->sga_intr[0] != SBGBUS_INTR_NONE) {
     85 		aprint_normal(" intr %u", sga->sga_intr[0]);
     86 		if (sga->sga_intr[1] != SBGBUS_INTR_NONE) {
     87 			aprint_normal(",%u", sga->sga_intr[1]);
     88 		}
     89 	}
     90 	return (UNCONF);
     91 }
     92 
     93 static int
     94 sbgbussearch(struct device *parent, struct cfdata *cf, void *aux)
     95 {
     96 	struct sbgbus_attach_args sga;
     97 	int tryagain;
     98 
     99 	do {
    100 		/* Fill in sga */
    101 		sga.sga_chipsel = cf->cf_loc[SBGBUSCF_CHIPSEL];
    102 		sga.sga_offset = cf->cf_loc[SBGBUSCF_OFFSET];
    103 		sga.sga_intr[0] = cf->cf_loc[SBGBUSCF_INTR];
    104 		sga.sga_intr[1] = cf->cf_loc[SBGBUSCF_INTR_1];
    105 
    106 		/* Some quick sanity checks. */
    107 		if (sga.sga_intr[0] == SBGBUS_INTR_NONE &&
    108 		    sga.sga_intr[1] != SBGBUS_INTR_NONE) {
    109 			/* XXX probably should print */
    110 			return (0);
    111 		}
    112 		if (sga.sga_chipsel == SBGBUS_CHIPSEL_NONE &&
    113 		    sga.sga_offset != 0) {
    114 			/* XXX probably should print */
    115 			return (0);
    116 		}
    117 		if (sga.sga_chipsel >= IO_EXT_CFG_COUNT) {
    118 			/* XXX probably should print */
    119 			return (0);
    120 		}
    121 
    122 		/* XXX check for PCMCIA. */
    123 
    124 		if (sga.sga_chipsel == SBGBUS_CHIPSEL_NONE) {
    125 			sga.sga_startphys = 0;
    126 			sga.sga_size = 0;
    127 		} else {
    128 			uint64_t rv;
    129 
    130 			rv = mips3_ld((void *)MIPS_PHYS_TO_KSEG1(
    131 			    A_IO_EXT_CS_BASE(sga.sga_chipsel) +
    132 			    R_IO_EXT_START_ADDR));
    133 			sga.sga_startphys = (rv & M_IO_START_ADDR) << S_IO_ADDRBASE;
    134 			rv = mips3_ld((void *)MIPS_PHYS_TO_KSEG1(
    135 			    A_IO_EXT_CS_BASE(sga.sga_chipsel) +
    136 			    R_IO_EXT_MULT_SIZE));
    137 			sga.sga_size = (rv & M_IO_MULT_SIZE) << S_IO_REGSIZE;
    138 
    139 			/* Make sure that region is enabled.  */
    140 			if (sga.sga_size == 0 ||
    141 			    sga.sga_startphys < A_PHYS_GENBUS ||
    142 			    sga.sga_startphys >= A_PHYS_GENBUS_END)
    143 				return (0);
    144 
    145 			/* Report to child only the space they can access. */
    146 			if (sga.sga_startphys + sga.sga_size > A_PHYS_GENBUS_END)
    147 			    sga.sga_size = A_PHYS_GENBUS_END - sga.sga_startphys;
    148 		}
    149 
    150 		tryagain = 0;
    151 		if (config_match(parent, cf, &sga) > 0) {
    152 			config_attach(parent, cf, &sga, sbgbusprint);
    153 			tryagain = (cf->cf_fstate == FSTATE_STAR);
    154 		}
    155 	} while (tryagain);
    156 
    157 	return (0);
    158 }
    159