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plcom_ifpga.c revision 1.13 
      1 /*      $NetBSD: plcom_ifpga.c,v 1.13 2012/05/20 10:28:44 skrll Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2001 ARM Ltd
      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  * 3. The name of the company may not be used to endorse or promote
     16  *    products derived from this software without specific prior written
     17  *    permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     20  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     22  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     23  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     25  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 /* Interface to plcom (PL010) serial driver. */
     33 
     34 #include <sys/cdefs.h>
     35 __KERNEL_RCSID(0, "$NetBSD: plcom_ifpga.c,v 1.13 2012/05/20 10:28:44 skrll Exp $");
     36 
     37 #include <sys/types.h>
     38 #include <sys/device.h>
     39 #include <sys/systm.h>
     40 #include <sys/param.h>
     41 #include <sys/malloc.h>
     42 
     43 #include <sys/termios.h>
     44 
     45 #include <machine/intr.h>
     46 #include <sys/bus.h>
     47 
     48 #include <evbarm/dev/plcomreg.h>
     49 #include <evbarm/dev/plcomvar.h>
     50 
     51 #include <evbarm/ifpga/plcom_ifpgavar.h>
     52 
     53 #include <evbarm/ifpga/ifpgareg.h>
     54 #include <evbarm/ifpga/ifpgavar.h>
     55 
     56 static int  plcom_ifpga_match(device_t, cfdata_t, void *);
     57 static void plcom_ifpga_attach(device_t, device_t, void *);
     58 static void plcom_ifpga_set_mcr(void *, int, u_int);
     59 
     60 CFATTACH_DECL_NEW(plcom_ifpga, sizeof(struct plcom_ifpga_softc),
     61     plcom_ifpga_match, plcom_ifpga_attach, NULL, NULL);
     62 
     63 static int
     64 plcom_ifpga_match(device_t parent, cfdata_t cf, void *aux)
     65 {
     66 	return 1;
     67 }
     68 
     69 static void
     70 plcom_ifpga_attach(device_t parent, device_t self, void *aux)
     71 {
     72 	struct plcom_ifpga_softc *isc = device_private(self);
     73 	struct plcom_softc *sc = &isc->sc_plcom;
     74 	struct ifpga_attach_args *ifa = aux;
     75 
     76 	isc->sc_iot = ifa->ifa_iot;
     77 	isc->sc_ioh = ifa->ifa_sc_ioh;
     78 	sc->sc_dev = self;
     79 	sc->sc_iounit = device_unit(sc->sc_dev);
     80 	sc->sc_frequency = IFPGA_UART_CLK;
     81 	sc->sc_iot = ifa->ifa_iot;
     82 	sc->sc_hwflags = 0;
     83 	sc->sc_swflags = 0;
     84 	sc->sc_set_mcr = plcom_ifpga_set_mcr;
     85 	sc->sc_set_mcr_arg = (void *)isc;
     86 
     87 	if (bus_space_map(ifa->ifa_iot, ifa->ifa_addr, PLCOM_UART_SIZE, 0,
     88 	    &sc->sc_ioh)) {
     89 		printf("%s: unable to map device\n", device_xname(sc->sc_dev));
     90 		return;
     91 	}
     92 
     93 	plcom_attach_subr(sc);
     94 	isc->sc_ih = ifpga_intr_establish(ifa->ifa_irq, IPL_SERIAL, plcomintr,
     95 	    sc);
     96 	if (isc->sc_ih == NULL)
     97 		panic("%s: cannot install interrupt handler",
     98 		    device_xname(sc->sc_dev));
     99 }
    100 
    101 static void plcom_ifpga_set_mcr(void *aux, int unit, u_int mcr)
    102 {
    103 	struct plcom_ifpga_softc *isc = (struct plcom_ifpga_softc *)aux;
    104 	u_int set, clr;
    105 
    106 	set = clr = 0;
    107 
    108 	switch (unit) {
    109 	case 0:
    110 		if (mcr & PL01X_MCR_RTS)
    111 			set |= IFPGA_SC_CTRL_UART0RTS;
    112 		else
    113 			clr |= IFPGA_SC_CTRL_UART0RTS;
    114 		if (mcr & PL01X_MCR_DTR)
    115 			set |= IFPGA_SC_CTRL_UART0DTR;
    116 		else
    117 			clr |= IFPGA_SC_CTRL_UART0DTR;
    118 	case 1:
    119 		if (mcr & PL01X_MCR_RTS)
    120 			set |= IFPGA_SC_CTRL_UART1RTS;
    121 		else
    122 			clr |= IFPGA_SC_CTRL_UART1RTS;
    123 		if (mcr & PL01X_MCR_DTR)
    124 			set |= IFPGA_SC_CTRL_UART1DTR;
    125 		else
    126 			clr |= IFPGA_SC_CTRL_UART1DTR;
    127 	default:
    128 		return;
    129 	}
    130 
    131 	if (set)
    132 		bus_space_write_1(isc->sc_iot, isc->sc_ioh, IFPGA_SC_CTRLS,
    133 		    set);
    134 	if (clr)
    135 		bus_space_write_1(isc->sc_iot, isc->sc_ioh, IFPGA_SC_CTRLC,
    136 		    clr);
    137 }
    138