1 /* $NetBSD: pxa2x0_com.c,v 1.5 2005/12/11 12:16:51 christos Exp $ */ 2 3 /* 4 * Copyright 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Steve C. Woodford for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: pxa2x0_com.c,v 1.5 2005/12/11 12:16:51 christos Exp $"); 40 41 #include "opt_com.h" 42 43 #ifndef COM_PXA2X0 44 #error "You must use options COM_PXA2X0 to get PXA2x0 serial port support" 45 #endif 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/device.h> 50 #include <sys/termios.h> 51 52 #include <machine/intr.h> 53 #include <machine/bus.h> 54 55 #include <dev/ic/comreg.h> 56 #include <dev/ic/comvar.h> 57 58 #include <arm/xscale/pxa2x0reg.h> 59 #include <arm/xscale/pxa2x0var.h> 60 61 #include "locators.h" 62 63 static int pxauart_match(struct device *, struct cfdata *, void *); 64 static void pxauart_attach(struct device *, struct device *, void *); 65 66 CFATTACH_DECL(pxauart, sizeof(struct com_softc), 67 pxauart_match, pxauart_attach, NULL, NULL); 68 69 static int 70 pxauart_match(struct device *parent, struct cfdata *cf, void *aux) 71 { 72 struct pxaip_attach_args *pxa = aux; 73 bus_space_tag_t bt = &pxa2x0_a4x_bs_tag; /* XXX: This sucks */ 74 bus_space_handle_t bh; 75 int rv; 76 77 switch (pxa->pxa_addr) { 78 case PXA2X0_FFUART_BASE: 79 if (pxa->pxa_intr != PXA2X0_INT_FFUART) 80 return (0); 81 break; 82 83 case PXA2X0_STUART_BASE: 84 if (pxa->pxa_intr != PXA2X0_INT_STUART) 85 return (0); 86 break; 87 88 case PXA2X0_BTUART_BASE: /* XXX: Config file option ... */ 89 if (pxa->pxa_intr != PXA2X0_INT_BTUART) 90 return (0); 91 break; 92 93 default: 94 return (0); 95 } 96 97 pxa->pxa_size = 0x20; 98 99 if (com_is_console(bt, pxa->pxa_addr, NULL)) 100 return (1); 101 102 if (bus_space_map(bt, pxa->pxa_addr, pxa->pxa_size, 0, &bh)) 103 return (0); 104 105 /* Make sure the UART is enabled */ 106 bus_space_write_1(bt, bh, com_ier, IER_EUART); 107 108 rv = comprobe1(bt, bh); 109 bus_space_unmap(bt, bh, pxa->pxa_size); 110 111 return (rv); 112 } 113 114 static void 115 pxauart_attach(struct device *parent, struct device *self, void *aux) 116 { 117 struct com_softc *sc = (struct com_softc *)self; 118 struct pxaip_attach_args *pxa = aux; 119 120 sc->sc_iot = &pxa2x0_a4x_bs_tag; /* XXX: This sucks */ 121 sc->sc_iobase = pxa->pxa_addr; 122 sc->sc_frequency = PXA2X0_COM_FREQ; 123 sc->sc_type = COM_TYPE_PXA2x0; 124 125 if (com_is_console(sc->sc_iot, sc->sc_iobase, &sc->sc_ioh) == 0 && 126 bus_space_map(sc->sc_iot, sc->sc_iobase, pxa->pxa_size, 0, 127 &sc->sc_ioh)) { 128 printf(": can't map registers\n"); 129 return; 130 } 131 132 com_attach_subr(sc); 133 134 pxa2x0_intr_establish(pxa->pxa_intr, IPL_SERIAL, comintr, sc); 135 } 136