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      1 /*	$NetBSD: clmpcc_pcctwo.c,v 1.20 2014/03/25 15:52:16 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999, 2002 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Steve C. Woodford.
      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 /*
     33  * Cirrus Logic CD2401 4-channel serial chip. PCCchip2 Front-end.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(0, "$NetBSD: clmpcc_pcctwo.c,v 1.20 2014/03/25 15:52:16 christos Exp $");
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/proc.h>
     42 #include <sys/device.h>
     43 #include <sys/conf.h>
     44 #include <sys/file.h>
     45 #include <sys/ioctl.h>
     46 #include <sys/tty.h>
     47 #include <sys/time.h>
     48 #include <sys/kernel.h>
     49 #include <sys/syslog.h>
     50 
     51 #include <dev/cons.h>
     52 
     53 #include <sys/cpu.h>
     54 #include <sys/bus.h>
     55 #include <sys/intr.h>
     56 
     57 #include <dev/ic/clmpccvar.h>
     58 
     59 #include <dev/mvme/pcctwovar.h>
     60 #include <dev/mvme/pcctworeg.h>
     61 
     62 /* XXXXSCW: Fixme */
     63 #ifdef MVME68K
     64 #include <mvme68k/dev/mainbus.h>
     65 #else
     66 #error Need consiack hook
     67 #endif
     68 
     69 
     70 /* Definition of the driver for autoconfig. */
     71 int clmpcc_pcctwo_match(device_t, cfdata_t, void *);
     72 void clmpcc_pcctwo_attach(device_t, device_t, void *);
     73 void clmpcc_pcctwo_iackhook(struct clmpcc_softc *, int);
     74 void clmpcc_pcctwo_consiackhook(struct clmpcc_softc *, int);
     75 
     76 CFATTACH_DECL_NEW(clmpcc_pcctwo, sizeof(struct clmpcc_softc),
     77     clmpcc_pcctwo_match, clmpcc_pcctwo_attach, NULL, NULL);
     78 
     79 extern struct cfdriver clmpcc_cd;
     80 
     81 extern const struct cdevsw clmpcc_cdevsw;
     82 
     83 /*
     84  * For clmpcccn*()
     85  */
     86 cons_decl(clmpcc);
     87 
     88 
     89 /*
     90  * Is the CD2401 chip present?
     91  */
     92 int
     93 clmpcc_pcctwo_match(device_t parent, cfdata_t cf, void *aux)
     94 {
     95 	struct pcctwo_attach_args *pa;
     96 
     97 	pa = aux;
     98 
     99 	if (strcmp(pa->pa_name, clmpcc_cd.cd_name))
    100 		return (0);
    101 
    102 	pa->pa_ipl = cf->pcctwocf_ipl;
    103 
    104 	return (1);
    105 }
    106 
    107 /*
    108  * Attach a found CD2401.
    109  */
    110 void
    111 clmpcc_pcctwo_attach(device_t parent, device_t self, void *aux)
    112 {
    113 	struct clmpcc_softc *sc;
    114 	struct pcctwo_attach_args *pa = aux;
    115 	int level = pa->pa_ipl;
    116 
    117 	sc = device_private(self);
    118 	sc->sc_dev = self;
    119 	level = pa->pa_ipl;
    120 	sc->sc_iot = pa->pa_bust;
    121 	bus_space_map(pa->pa_bust, pa->pa_offset, 0x100, 0, &sc->sc_ioh);
    122 
    123 	sc->sc_clk = 20000000;
    124 	sc->sc_byteswap = CLMPCC_BYTESWAP_LOW;
    125 	sc->sc_swaprtsdtr = 1;
    126 	sc->sc_iackhook = clmpcc_pcctwo_iackhook;
    127 	sc->sc_vector_base = PCCTWO_SCC_VECBASE;
    128 	sc->sc_rpilr = 0x03;
    129 	sc->sc_tpilr = 0x02;
    130 	sc->sc_mpilr = 0x01;
    131 	sc->sc_evcnt = pcctwointr_evcnt(level);
    132 
    133 	/* Do common parts of CD2401 configuration. */
    134 	clmpcc_attach(sc);
    135 
    136 	/* Hook the interrupts */
    137 	pcctwointr_establish(PCCTWOV_SCC_RX, clmpcc_rxintr, level, sc, NULL);
    138 	pcctwointr_establish(PCCTWOV_SCC_RX_EXCEP, clmpcc_rxintr, level, sc,
    139 	    NULL);
    140 	pcctwointr_establish(PCCTWOV_SCC_TX, clmpcc_txintr, level, sc, NULL);
    141 	pcctwointr_establish(PCCTWOV_SCC_MODEM, clmpcc_mdintr, level, sc, NULL);
    142 }
    143 
    144 void
    145 clmpcc_pcctwo_iackhook(struct clmpcc_softc *sc, int which)
    146 {
    147 	bus_size_t offset;
    148 	volatile u_char foo;
    149 
    150 	switch (which) {
    151 	case CLMPCC_IACK_MODEM:
    152 		offset = PCC2REG_SCC_MODEM_PIACK;
    153 		break;
    154 
    155 	case CLMPCC_IACK_RX:
    156 		offset = PCC2REG_SCC_RX_PIACK;
    157 		break;
    158 
    159 	case CLMPCC_IACK_TX:
    160 		offset = PCC2REG_SCC_TX_PIACK;
    161 		break;
    162 	default:
    163 #ifdef DEBUG
    164 		printf("%s: Invalid IACK number '%d'\n",
    165 		    device_xname(sc->sc_dev), which);
    166 #endif
    167 		panic("clmpcc_pcctwo_iackhook %d", which);
    168 	}
    169 
    170 	foo = pcc2_reg_read(sys_pcctwo, offset);
    171 	__USE(foo);
    172 }
    173 
    174 /*
    175  * This routine is only used prior to clmpcc_attach() being called
    176  */
    177 void
    178 clmpcc_pcctwo_consiackhook(struct clmpcc_softc *sc, int which)
    179 {
    180 	bus_space_handle_t bush;
    181 	bus_size_t offset;
    182 	volatile u_char foo;
    183 
    184 	switch (which) {
    185 	case CLMPCC_IACK_MODEM:
    186 		offset = PCC2REG_SCC_MODEM_PIACK;
    187 		break;
    188 
    189 	case CLMPCC_IACK_RX:
    190 		offset = PCC2REG_SCC_RX_PIACK;
    191 		break;
    192 
    193 	case CLMPCC_IACK_TX:
    194 		offset = PCC2REG_SCC_TX_PIACK;
    195 		break;
    196 	default:
    197 #ifdef DEBUG
    198 		printf("%s: Invalid IACK number '%d'\n",
    199 		    device_xname(sc->sc_dev), which);
    200 		panic("clmpcc_pcctwo_consiackhook");
    201 #endif
    202 		panic("clmpcc_pcctwo_iackhook %d", which);
    203 	}
    204 
    205 #ifdef MVME68K
    206 	/*
    207 	 * We need to fake the tag and handle since 'sys_pcctwo' will
    208 	 * be NULL during early system startup...
    209 	 */
    210 	bush = (bus_space_handle_t) & (intiobase[MAINBUS_PCCTWO_OFFSET +
    211 		PCCTWO_REG_OFF]);
    212 
    213 	foo = bus_space_read_1(&_mainbus_space_tag, bush, offset);
    214 	__USE(foo);
    215 #else
    216 #error Need consiack hook
    217 #endif
    218 }
    219 
    220 
    221 /****************************************************************
    222  * Console support functions (MVME PCCchip2 specific!)
    223  ****************************************************************/
    224 
    225 /*
    226  * Check for CD2401 console.
    227  */
    228 void
    229 clmpcccnprobe(struct consdev *cp)
    230 {
    231 	int maj;
    232 
    233 #if defined(MVME68K)
    234 	if (machineid != MVME_167 && machineid != MVME_177)
    235 #elif defined(MVME88K)
    236 	if (machineid != MVME_187)
    237 #endif
    238 	{
    239 		cp->cn_pri = CN_DEAD;
    240 		return;
    241 	}
    242 
    243 	/*
    244 	 * Locate the major number
    245 	 */
    246 	maj = cdevsw_lookup_major(&clmpcc_cdevsw);
    247 
    248 	/* Initialize required fields. */
    249 	cp->cn_dev = makedev(maj, 0);
    250 	cp->cn_pri = CN_NORMAL;
    251 }
    252 
    253 void
    254 clmpcccninit(struct consdev *cp)
    255 {
    256 	static struct clmpcc_softc cons_sc;
    257 
    258 	cons_sc.sc_iot = &_mainbus_space_tag;
    259 	bus_space_map(&_mainbus_space_tag,
    260 	    intiobase_phys + MAINBUS_PCCTWO_OFFSET + PCCTWO_SCC_OFF,
    261 	    PCC2REG_SIZE, 0, &cons_sc.sc_ioh);
    262 	cons_sc.sc_clk = 20000000;
    263 	cons_sc.sc_byteswap = CLMPCC_BYTESWAP_LOW;
    264 	cons_sc.sc_swaprtsdtr = 1;
    265 	cons_sc.sc_iackhook = clmpcc_pcctwo_consiackhook;
    266 	cons_sc.sc_vector_base = PCCTWO_SCC_VECBASE;
    267 	cons_sc.sc_rpilr = 0x03;
    268 	cons_sc.sc_tpilr = 0x02;
    269 	cons_sc.sc_mpilr = 0x01;
    270 
    271 	clmpcc_cnattach(&cons_sc, 0, 9600);
    272 }
    273