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      1 /*	$NetBSD: ixp425_com.c,v 1.19 2018/12/08 17:46:10 thorpej 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: ixp425_com.c,v 1.19 2018/12/08 17:46:10 thorpej Exp $");
     40 
     41 #include "opt_com.h"
     42 #ifndef COM_PXA2X0
     43 #error "You must use options COM_PXA2X0 to get IXP425 serial port support"
     44 #endif
     45 
     46 #include <sys/systm.h>
     47 #include <sys/param.h>
     48 #include <sys/device.h>
     49 #include <sys/termios.h>
     50 
     51 #include <machine/intr.h>
     52 #include <sys/bus.h>
     53 
     54 #include <dev/ic/comreg.h>
     55 #include <dev/ic/comvar.h>
     56 
     57 #include <arm/xscale/ixp425reg.h>
     58 #include <arm/xscale/ixp425var.h>
     59 #include <arm/xscale/ixp425_sipvar.h>
     60 
     61 static int	ixsipcom_match(device_t, cfdata_t , void *);
     62 static void	ixsipcom_attach(device_t, device_t, void *);
     63 
     64 CFATTACH_DECL_NEW(ixsipcom, sizeof(struct com_softc),
     65     ixsipcom_match, ixsipcom_attach, NULL, NULL);
     66 
     67 static const int uart_irq[] = {IXP425_INT_UART0, IXP425_INT_UART1};
     68 
     69 static int
     70 ixsipcom_match(device_t parent, cfdata_t match, void *aux)
     71 {
     72 	struct ixpsip_attach_args *sa = aux;
     73 	bus_space_tag_t bt = &ixp425_a4x_bs_tag;
     74 	bus_space_handle_t bh;
     75 	int rv;
     76 
     77 	if (strcmp(match->cf_name, "ixsipcom") == 0)
     78 		return 1;
     79 
     80 	if (com_is_console(bt, sa->sa_addr, NULL))
     81 		return (1);
     82 
     83 	if (bus_space_map(bt, sa->sa_addr, sa->sa_size, 0, &bh))
     84 		return (0);
     85 
     86 	/* Make sure the UART is enabled */
     87 	bus_space_write_1(bt, bh, com_ier, IER_EUART);
     88 
     89 	rv = comprobe1(bt, bh);
     90 	bus_space_unmap(bt, bh, sa->sa_size);
     91 
     92 	return (rv);
     93 }
     94 
     95 static void
     96 ixsipcom_attach(device_t parent, device_t self, void *aux)
     97 {
     98 	struct com_softc *sc = device_private(self);
     99 	struct ixpsip_attach_args *sa = aux;
    100 	bus_space_tag_t iot;
    101 	bus_space_handle_t ioh;
    102 	bus_addr_t iobase;
    103 
    104 	sc->sc_dev = self;
    105 	iot = &ixp425_a4x_bs_tag;
    106 	iobase = sa->sa_addr;
    107 	sc->sc_frequency = IXP425_UART_FREQ;
    108 	sc->sc_type = COM_TYPE_PXA2x0;
    109 
    110 	if (com_is_console(iot, iobase, &ioh) == 0 &&
    111 	    bus_space_map(iot, iobase, sa->sa_size, 0, &ioh)) {
    112 		aprint_error(": can't map registers\n");
    113 		return;
    114 	}
    115 	com_init_regs(&sc->sc_regs, iot, ioh, iobase);
    116 
    117 	com_attach_subr(sc);
    118 
    119 	ixp425_intr_establish(uart_irq[sa->sa_index], IPL_SERIAL, comintr, sc);
    120 }
    121