1 /* $Id: imx23_plcom.c,v 1.1 2012/11/20 19:06:13 jkunz Exp $ */ 2 3 /* 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Petri Laakso 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* Interface to plcom (PL011) serial driver. */ 33 34 #include <sys/param.h> 35 #include <sys/types.h> 36 #include <sys/bus.h> 37 #include <sys/device.h> 38 #include <sys/systm.h> 39 #include <sys/termios.h> 40 41 #include <arm/pic/picvar.h> 42 43 #include <arm/imx/imx23var.h> 44 #include <arm/imx/imx23_uartdbgreg.h> 45 46 #include <evbarm/dev/plcomreg.h> 47 #include <evbarm/dev/plcomvar.h> 48 49 static int imx23_plcom_match(device_t, cfdata_t, void *); 50 static void imx23_plcom_attach(device_t, device_t, void *); 51 52 CFATTACH_DECL3_NEW(imx23plcom, 53 sizeof(struct plcom_softc), 54 imx23_plcom_match, 55 imx23_plcom_attach, 56 NULL, 57 NULL, 58 NULL, 59 NULL, 60 0); 61 62 static int 63 imx23_plcom_match(device_t parent, cfdata_t cf, void *aux) 64 { 65 struct apb_attach_args *aaa = aux; 66 67 if (aaa->aa_addr == HW_UARTDBG_BASE && 68 aaa->aa_size == PL011COM_UART_SIZE) { 69 return 1; 70 } 71 72 return 0; 73 } 74 75 static void 76 imx23_plcom_attach(device_t parent, device_t self, void *aux) 77 { 78 static int plcom_attached = 0; 79 struct plcom_softc *sc = device_private(self); 80 struct apb_attach_args *aaa = aux; 81 void *ih; 82 83 if (plcom_attached) 84 return; 85 86 sc->sc_dev = self; 87 sc->sc_frequency = IMX23_UART_CLK; 88 sc->sc_hwflags = PLCOM_HW_TXFIFO_DISABLE; 89 sc->sc_swflags = 0; 90 sc->sc_set_mcr = NULL; 91 sc->sc_set_mcr_arg = NULL; 92 93 sc->sc_pi.pi_type = PLCOM_TYPE_PL011; 94 sc->sc_pi.pi_flags = PLC_FLAG_32BIT_ACCESS; 95 sc->sc_pi.pi_iot = aaa->aa_iot; 96 sc->sc_pi.pi_iobase = aaa->aa_addr; 97 98 if (bus_space_map(aaa->aa_iot, aaa->aa_addr, PL011COM_UART_SIZE, 0, 99 &sc->sc_pi.pi_ioh)) { 100 aprint_error_dev(sc->sc_dev, "unable to map device\n"); 101 return; 102 } 103 104 plcom_attach_subr(sc); 105 106 ih = intr_establish(aaa->aa_irq, IPL_SERIAL, IST_LEVEL, 107 plcomintr, sc); 108 109 if (ih == NULL) 110 panic("%s: cannot install interrupt handler", 111 device_xname(sc->sc_dev)); 112 113 plcom_attached = 1; 114 115 return; 116 } 117