1 /* $NetBSD: ixdp425_led.c,v 1.4 2009/10/21 14:15:51 rmind Exp $ */ 2 /* 3 * Copyright (c) 2003 4 * Ichiro FUKUHARA <ichiro@ichiro.org>. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: ixdp425_led.c,v 1.4 2009/10/21 14:15:51 rmind Exp $"); 30 31 /* 32 * LED support for IXDP425 33 */ 34 35 #include <sys/param.h> 36 #include <sys/types.h> 37 #include <sys/callout.h> 38 #include <sys/device.h> 39 #include <sys/kernel.h> 40 #include <sys/systm.h> 41 42 #include <machine/bus.h> 43 44 #include <arm/xscale/ixp425_sipvar.h> 45 #include <arm/xscale/ixp425var.h> 46 47 static int ixdpled_match(struct device *, struct cfdata *, void *); 48 static void ixdpled_attach(struct device *, struct device *, void *); 49 static void ixdpled_callout(void *); 50 51 extern void ixp425_expbus_init(void); 52 53 struct ixdpled_softc { 54 struct device sc_dev; 55 bus_space_tag_t sc_iot; 56 bus_space_handle_t sc_ioh; 57 bus_addr_t sc_baseaddr; 58 bus_space_handle_t sc_pos; 59 struct callout sc_co; 60 }; 61 62 CFATTACH_DECL(ixdpled, sizeof(struct ixdpled_softc), 63 ixdpled_match, ixdpled_attach, NULL, NULL); 64 65 static int 66 ixdpled_match(struct device *parent, struct cfdata *match, void *aux) 67 { 68 return (1); 69 } 70 71 static void 72 ixdpled_attach(struct device *parent, struct device *self, void *aux) 73 { 74 struct ixdpled_softc* sc = (struct ixdpled_softc*) self; 75 struct ixpsip_attach_args* sa = aux; 76 77 printf("\n"); 78 79 sc->sc_iot = sa->sa_iot; 80 sc->sc_baseaddr = sa->sa_addr; 81 82 if(bus_space_map(sc->sc_iot, sa->sa_addr, sa->sa_size, 0, 83 &sc->sc_ioh)) { 84 printf("%s: unable to map registers\n", self->dv_xname); 85 return; 86 } 87 88 IXPREG(IXP425_EXP_VBASE + EXP_TIMING_CS2_OFFSET) = 89 IXP425_EXP_ADDR_T(3) | IXP425_EXP_SETUP_T(3) | 90 IXP425_EXP_STROBE_T(15) | IXP425_EXP_HOLD_T(3) | 91 IXP425_EXP_RECOVERY_T(15) | EXP_SZ_512 | EXP_WR_EN | 92 IXP425_EXP_CS_EN; 93 94 callout_init(&sc->sc_co, 0); 95 callout_reset(&sc->sc_co, hz / 5, ixdpled_callout, sc); 96 97 } 98 99 static void 100 ixdpled_callout(void *arg) 101 { 102 struct ixdpled_softc* sc = arg; 103 104 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0, 105 0x1000 + (sc->sc_pos++ % 16)); 106 107 callout_reset(&sc->sc_co, hz / 5, ixdpled_callout, sc); 108 } 109 110