Annotation of src/sys/arch/arm/omap/omapl1x_tipb.c, Revision 1.1.4.2
1.1.4.2 ! rmind 1:
! 2: /*
! 3: * Autoconfiguration support for the Texas Instruments OMAP TIPB.
! 4: * Based on arm/xscale/pxa2x0.c which in turn was derived from
! 5: * arm/sa11x0/sa11x0.c. The code to do the early attach was initially derived
! 6: * from arch/sparc/dev/obio.c.
! 7: *
! 8: * Copyright (c) 2002, 2005 Genetec Corporation. All rights reserved.
! 9: * Written by Hiroyuki Bessho for Genetec Corporation.
! 10: *
! 11: * Redistribution and use in source and binary forms, with or without
! 12: * modification, are permitted provided that the following conditions
! 13: * are met:
! 14: * 1. Redistributions of source code must retain the above copyright
! 15: * notice, this list of conditions and the following disclaimer.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. All advertising materials mentioning features or use of this software
! 20: * must display the following acknowledgement:
! 21: * This product includes software developed for the NetBSD Project by
! 22: * Genetec Corporation.
! 23: * 4. The name of Genetec Corporation may not be used to endorse or
! 24: * promote products derived from this software without specific prior
! 25: * written permission.
! 26: *
! 27: * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND
! 28: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION
! 31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 37: * POSSIBILITY OF SUCH DAMAGE.
! 38: *
! 39: * Copyright (c) 1997, 1998, 2001, The NetBSD Foundation, Inc.
! 40: * All rights reserved.
! 41: *
! 42: * This code is derived from software contributed to The NetBSD Foundation
! 43: * by IWAMOTO Toshihiro, Ichiro FUKUHARA and Paul Kranenburg.
! 44: *
! 45: * Redistribution and use in source and binary forms, with or without
! 46: * modification, are permitted provided that the following conditions
! 47: * are met:
! 48: * 1. Redistributions of source code must retain the above copyright
! 49: * notice, this list of conditions and the following disclaimer.
! 50: * 2. Redistributions in binary form must reproduce the above copyright
! 51: * notice, this list of conditions and the following disclaimer in the
! 52: * documentation and/or other materials provided with the distribution.
! 53: *
! 54: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 55: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 56: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 57: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 58: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 59: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 60: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 61: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 62: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 63: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 64: * POSSIBILITY OF SUCH DAMAGE.
! 65: *
! 66: * Copyright (c) 1999
! 67: * Shin Takemura and PocketBSD Project. All rights reserved.
! 68: *
! 69: * Redistribution and use in source and binary forms, with or without
! 70: * modification, are permitted provided that the following conditions
! 71: * are met:
! 72: * 1. Redistributions of source code must retain the above copyright
! 73: * notice, this list of conditions and the following disclaimer.
! 74: * 2. Redistributions in binary form must reproduce the above copyright
! 75: * notice, this list of conditions and the following disclaimer in the
! 76: * documentation and/or other materials provided with the distribution.
! 77: * 3. All advertising materials mentioning features or use of this software
! 78: * must display the following acknowledgement:
! 79: * This product includes software developed by the PocketBSD project
! 80: * and its contributors.
! 81: * 4. Neither the name of the project nor the names of its contributors
! 82: * may be used to endorse or promote products derived from this software
! 83: * without specific prior written permission.
! 84: *
! 85: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 86: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 87: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 88: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 89: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 90: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 91: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 92: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 93: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 94: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 95: * SUCH DAMAGE.
! 96: */
! 97:
! 98: #include <sys/cdefs.h>
! 99:
! 100: __KERNEL_RCSID(0, "$NetBSD$");
! 101:
! 102: #include "locators.h"
! 103:
! 104: #include <sys/param.h>
! 105: #include <sys/systm.h>
! 106: #include <sys/device.h>
! 107: #include <sys/kernel.h>
! 108: #include <sys/reboot.h>
! 109: #include <sys/bus.h>
! 110:
! 111: #include <machine/cpu.h>
! 112:
! 113:
! 114: #include <arm/cpufunc.h>
! 115: #include <arm/mainbus/mainbus.h>
! 116: /*
! 117: * XXX. Do we really need this ? #include <arm/omap/omap_reg.h>
! 118: * Atleast commenting this makes it more generic.
! 119: */
! 120: #include <arm/omap/omap_tipb.h>
! 121: #include <arm/omap/omap_var.h>
! 122:
! 123: struct tipb_softc {
! 124: struct device sc_dev;
! 125: bus_dma_tag_t sc_dmac;
! 126: };
! 127:
! 128: /* prototypes */
! 129: static int tipb_match(struct device *, struct cfdata *, void *);
! 130: static void tipb_attach(struct device *, struct device *, void *);
! 131: static int tipb_search(struct device *, struct cfdata *,
! 132: const int *, void *);
! 133: static int tipb_print(void *, const char *);
! 134:
! 135: /* attach structures */
! 136: CFATTACH_DECL_NEW(tipb, sizeof(struct tipb_softc),
! 137: tipb_match, tipb_attach, NULL, NULL);
! 138:
! 139: static int tipb_attached;
! 140:
! 141: extern struct arm32_bus_dma_tag omapl1x_bus_dma_tag;
! 142:
! 143: /*
! 144: * There are some devices that need to be set up before all the others. The
! 145: * earlies array contains their names. tipb_attach() and tipb_search() work
! 146: * together to attach these devices in the order they appear in this array
! 147: * before any other TIPB devices are attached.
! 148: */
! 149: static const char * const earlies[] = {
! 150: OMAP_INTC_DEVICE,
! 151: "omapl1xtimer",
! 152: "omapl1xpsc",
! 153: NULL
! 154: };
! 155:
! 156: static int
! 157: tipb_match(struct device *parent, struct cfdata *match, void *aux)
! 158: {
! 159: if (tipb_attached)
! 160: return 0;
! 161: return 1;
! 162: }
! 163:
! 164: static void
! 165: tipb_attach(struct device *parent, struct device *self, void *aux)
! 166: {
! 167: struct tipb_softc *sc = (struct tipb_softc *)self;
! 168:
! 169: tipb_attached = 1;
! 170:
! 171: #if NOMAPDMAC > 0
! 172: #error DMA not implemented
! 173: sc->sc_dmac = &omap_bus_dma_tag;
! 174: #else
! 175: sc->sc_dmac = omap_bus_dma_init(&omapl1x_bus_dma_tag);
! 176: #endif
! 177:
! 178: aprint_normal(": OMAP L1X Texas Instruments Peripheral Bus\n");
! 179: aprint_naive("\n");
! 180:
! 181: /*
! 182: * There are some devices that need to be set up before all the
! 183: * others. The earlies array contains their names. Find them and
! 184: * attach them in the order they appear in the array.
! 185: */
! 186: const char *const *earlyp;
! 187: for (earlyp = earlies; *earlyp != NULL; earlyp++)
! 188: /*
! 189: * The bus search function is passed an aux argument that
! 190: * "describes the device that has been found". The type of it
! 191: * is void *. However, I want to pass a constant string, so
! 192: * use __UNCONST to convince the compiler that this is ok.
! 193: */
! 194: config_search_ia(tipb_search, self, "tipb",
! 195: __UNCONST(*earlyp));
! 196:
! 197: /*
! 198: * Attach all other devices
! 199: */
! 200: config_search_ia(tipb_search, self, "tipb", NULL);
! 201: }
! 202:
! 203: static int
! 204: tipb_search(struct device *parent, struct cfdata *cf,
! 205: const int *ldesc, void *aux)
! 206: {
! 207: struct tipb_softc *sc = (struct tipb_softc *)parent;
! 208: struct tipb_attach_args aa;
! 209: const char *const name = (const char *const)aux;
! 210:
! 211: /* Check whether we're looking for a specifically named device */
! 212: if (name != NULL && strcmp(name, cf->cf_name) != 0)
! 213: return (0);
! 214:
! 215: switch (cf->cf_loc[TIPBCF_MULT]) {
! 216: case 1:
! 217: aa.tipb_iot = &omap_bs_tag;
! 218: break;
! 219: case 2:
! 220: aa.tipb_iot = &omap_a2x_bs_tag;
! 221: break;
! 222: case 4:
! 223: aa.tipb_iot = &omap_a4x_bs_tag;
! 224: break;
! 225: default:
! 226: panic("Unsupported TIPB multiplier.");
! 227: break;
! 228: }
! 229: aa.tipb_dmac = sc->sc_dmac;
! 230: aa.tipb_addr = cf->cf_loc[TIPBCF_ADDR];
! 231: aa.tipb_size = cf->cf_loc[TIPBCF_SIZE];
! 232: aa.tipb_intr = cf->cf_loc[TIPBCF_INTR];
! 233: aa.tipb_mult = cf->cf_loc[TIPBCF_MULT];
! 234:
! 235: if (config_match(parent, cf, &aa))
! 236: config_attach(parent, cf, &aa, tipb_print);
! 237:
! 238: return 0;
! 239: }
! 240:
! 241: static int
! 242: tipb_print(void *aux, const char *name)
! 243: {
! 244: struct tipb_attach_args *sa = (struct tipb_attach_args*)aux;
! 245:
! 246: if (sa->tipb_addr != TIPBCF_ADDR_DEFAULT) {
! 247: aprint_normal(" addr 0x%08lx", sa->tipb_addr);
! 248: if (sa->tipb_size > TIPBCF_SIZE_DEFAULT)
! 249: aprint_normal("-0x%08lx", sa->tipb_addr + sa->tipb_size-1);
! 250: }
! 251: if (sa->tipb_intr != TIPBCF_INTR_DEFAULT)
! 252: aprint_normal(" intr %d", sa->tipb_intr);
! 253:
! 254: return (UNCONF);
! 255: }
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