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      1 /*	$NetBSD: com_mv.c,v 1.12 2019/01/27 02:08:42 pgoyette Exp $	*/
      2 /*
      3  * Copyright (c) 2007, 2010 KIYOHARA Takashi
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     18  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
     19  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     20  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     23  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
     24  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     25  * POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: com_mv.c,v 1.12 2019/01/27 02:08:42 pgoyette Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/bus.h>
     33 #include <sys/device.h>
     34 #include <sys/errno.h>
     35 #include <sys/termios.h>
     36 
     37 #include <dev/marvell/gtvar.h>
     38 #include <dev/marvell/marvellreg.h>
     39 #include <dev/marvell/marvellvar.h>
     40 
     41 #include <dev/ic/comvar.h>
     42 
     43 #include <prop/proplib.h>
     44 
     45 #define MVUART_SIZE		0x20
     46 
     47 
     48 static int mvuart_match(device_t, struct cfdata *, void *);
     49 static void mvuart_attach(device_t, device_t, void *);
     50 
     51 CFATTACH_DECL_NEW(mvuart_gt, sizeof(struct com_softc),
     52     mvuart_match, mvuart_attach, NULL, NULL);
     53 CFATTACH_DECL_NEW(mvuart_mbus, sizeof(struct com_softc),
     54     mvuart_match, mvuart_attach, NULL, NULL);
     55 
     56 static void
     57 mvuart_init_regs(struct com_regs *regs, bus_space_tag_t tag,
     58 		 bus_space_handle_t hdl, bus_addr_t addr)
     59 {
     60 
     61 	com_init_regs_stride(regs, tag, hdl, addr, 2);
     62 }
     63 
     64 
     65 /* ARGSUSED */
     66 static int
     67 mvuart_match(device_t parent, struct cfdata *match, void *aux)
     68 {
     69 	struct marvell_attach_args *mva = aux;
     70 	struct com_regs regs;
     71 	bus_space_handle_t ioh;
     72 
     73 	if (strcmp(mva->mva_name, match->cf_name) != 0)
     74 		return 0;
     75 	if (mva->mva_offset == MVA_OFFSET_DEFAULT ||
     76 	    mva->mva_irq == MVA_IRQ_DEFAULT)
     77 		return 0;
     78 
     79 	if (com_is_console(mva->mva_iot, mva->mva_addr + mva->mva_offset, NULL))
     80 		goto console;
     81 
     82 	if (bus_space_subregion(mva->mva_iot, mva->mva_ioh, mva->mva_offset,
     83 	    MVUART_SIZE, &ioh))
     84 		return 0;
     85 	mvuart_init_regs(&regs, mva->mva_iot, ioh, mva->mva_offset);
     86 	if (!com_probe_subr(&regs))
     87 		return 0;
     88 
     89 console:
     90 	mva->mva_size = MVUART_SIZE;
     91 	return 1;
     92 }
     93 
     94 /* ARGSUSED */
     95 static void
     96 mvuart_attach(device_t parent, device_t self, void *aux)
     97 {
     98 	struct com_softc *sc = device_private(self);
     99 	struct marvell_attach_args *mva = aux;
    100 	bus_space_tag_t iot;
    101 	bus_space_handle_t ioh;
    102 	prop_dictionary_t dict = device_properties(self);
    103 
    104 	sc->sc_dev = self;
    105 
    106 	if (!prop_dictionary_get_uint32(dict, "frequency", &sc->sc_frequency)) {
    107 		aprint_error(": no frequency property\n");
    108 		return;
    109 	}
    110 
    111 	iot = mva->mva_iot;
    112 	if (!com_is_console(iot, mva->mva_addr + mva->mva_offset, &ioh)) {
    113 		if (bus_space_subregion(iot, mva->mva_ioh, mva->mva_offset,
    114 		    mva->mva_size, &ioh)) {
    115 			aprint_error(": can't map registers\n");
    116 			return;
    117 		}
    118 	}
    119 	mvuart_init_regs(&sc->sc_regs,
    120 	    iot, ioh, mva->mva_addr + mva->mva_offset);
    121 
    122 	com_attach_subr(sc);
    123 
    124 	marvell_intr_establish(mva->mva_irq, IPL_SERIAL, comintr, sc);
    125 }
    126 
    127 int mvuart_cnattach(bus_space_tag_t, bus_addr_t, int, uint32_t, int);
    128 
    129 int
    130 mvuart_cnattach(bus_space_tag_t iot, bus_addr_t addr, int baud,
    131 		uint32_t sysfreq, int mode)
    132 {
    133 	struct com_regs regs;
    134 
    135 	mvuart_init_regs(&regs, iot, 0x0, addr);
    136 
    137 	return comcnattach1(&regs, baud, sysfreq, COM_TYPE_16550_NOERS, mode);
    138 }
    139