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tc5165buf.c revision 1.10 
      1 /*	$NetBSD: tc5165buf.c,v 1.10 2002/09/27 20:32:15 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1999-2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by UCHIYAMA Yasushi.
      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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*
     40  * Device driver for TOSHIBA TC5165BFTS, PHILIPS 74ALVC16241/245
     41  * buffer chip
     42  */
     43 
     44 #include "opt_use_poll.h"
     45 
     46 #include <sys/param.h>
     47 #include <sys/systm.h>
     48 #include <sys/callout.h>
     49 #include <sys/device.h>
     50 
     51 #include <machine/bus.h>
     52 #include <machine/intr.h>
     53 
     54 #include <dev/hpc/hpckbdvar.h>
     55 
     56 #include <hpcmips/tx/tx39var.h>
     57 #include <hpcmips/tx/txcsbusvar.h>
     58 #include <hpcmips/dev/tc5165bufvar.h>
     59 
     60 #define TC5165_ROW_MAX		16
     61 #define TC5165_COLUMN_MAX	8
     62 
     63 #ifdef TC5165DEBUG
     64 #define	DPRINTF(arg) printf arg
     65 #else
     66 #define	DPRINTF(arg)
     67 #endif
     68 
     69 struct tc5165buf_chip {
     70 	bus_space_tag_t		scc_cst;
     71 	bus_space_handle_t	scc_csh;
     72 	u_int16_t		scc_buf[TC5165_COLUMN_MAX];
     73 	int			scc_enabled;
     74 	int			scc_queued;
     75 	struct callout		scc_soft_ch;
     76 	struct hpckbd_ic_if	scc_if;
     77 	struct hpckbd_if	*scc_hpckbd;
     78 };
     79 
     80 struct tc5165buf_softc {
     81 	struct device		sc_dev;
     82 	struct tc5165buf_chip	*sc_chip;
     83 	tx_chipset_tag_t	sc_tc;
     84 	void			*sc_ih;
     85 };
     86 
     87 int	tc5165buf_match(struct device *, struct cfdata *, void *);
     88 void	tc5165buf_attach(struct device *, struct device *, void *);
     89 int	tc5165buf_intr(void *);
     90 int	tc5165buf_poll(void *);
     91 void	tc5165buf_soft(void *);
     92 void	tc5165buf_ifsetup(struct tc5165buf_chip *);
     93 
     94 int	tc5165buf_input_establish(void *, struct hpckbd_if *);
     95 
     96 struct tc5165buf_chip tc5165buf_chip;
     97 
     98 const struct cfattach tc5165buf_ca = {
     99 	sizeof(struct tc5165buf_softc), tc5165buf_match, tc5165buf_attach
    100 };
    101 
    102 int
    103 tc5165buf_match(struct device *parent, struct cfdata *cf, void *aux)
    104 {
    105 
    106 	return (1);
    107 }
    108 
    109 void
    110 tc5165buf_attach(struct device *parent, struct device *self, void *aux)
    111 {
    112 	struct cs_attach_args *ca = aux;
    113 	struct tc5165buf_softc *sc = (void*)self;
    114 	struct hpckbd_attach_args haa;
    115 
    116 	printf(": ");
    117 	sc->sc_tc = ca->ca_tc;
    118 	sc->sc_chip = &tc5165buf_chip;
    119 
    120 	callout_init(&sc->sc_chip->scc_soft_ch);
    121 
    122 	sc->sc_chip->scc_cst = ca->ca_csio.cstag;
    123 
    124 	if (bus_space_map(sc->sc_chip->scc_cst, ca->ca_csio.csbase,
    125 	    ca->ca_csio.cssize, 0, &sc->sc_chip->scc_csh)) {
    126 		printf("can't map i/o space\n");
    127 		return;
    128 	}
    129 
    130 	sc->sc_chip->scc_enabled = 0;
    131 
    132 	if (ca->ca_irq1 != -1) {
    133 		sc->sc_ih = tx_intr_establish(sc->sc_tc, ca->ca_irq1,
    134 		    IST_EDGE, IPL_TTY,
    135 		    tc5165buf_intr, sc);
    136 		printf("interrupt mode");
    137 	} else {
    138 		sc->sc_ih = tx39_poll_establish(sc->sc_tc, 1, IPL_TTY,
    139 		    tc5165buf_intr, sc);
    140 		printf("polling mode");
    141 	}
    142 
    143 	if (!sc->sc_ih) {
    144 		printf(" can't establish interrupt\n");
    145 		return;
    146 	}
    147 
    148 	printf("\n");
    149 
    150 	/* setup upper interface */
    151 	tc5165buf_ifsetup(sc->sc_chip);
    152 
    153 	haa.haa_ic = &sc->sc_chip->scc_if;
    154 
    155 	config_found(self, &haa, hpckbd_print);
    156 }
    157 
    158 void
    159 tc5165buf_ifsetup(struct tc5165buf_chip *scc)
    160 {
    161 
    162 	scc->scc_if.hii_ctx		= scc;
    163 	scc->scc_if.hii_establish	= tc5165buf_input_establish;
    164 	scc->scc_if.hii_poll		= tc5165buf_poll;
    165 }
    166 
    167 int
    168 tc5165buf_cnattach(paddr_t addr)
    169 {
    170 	struct tc5165buf_chip *scc = &tc5165buf_chip;
    171 
    172 	scc->scc_csh = MIPS_PHYS_TO_KSEG1(addr);
    173 
    174 	tc5165buf_ifsetup(scc);
    175 
    176 	hpckbd_cnattach(&scc->scc_if);
    177 
    178 	return (0);
    179 }
    180 
    181 int
    182 tc5165buf_input_establish(void *ic, struct hpckbd_if *kbdif)
    183 {
    184 	struct tc5165buf_chip *scc = ic;
    185 
    186 	/* save hpckbd interface */
    187 	scc->scc_hpckbd = kbdif;
    188 
    189 	scc->scc_enabled = 1;
    190 
    191 	return (0);
    192 }
    193 
    194 int
    195 tc5165buf_intr(void *arg)
    196 {
    197 	struct tc5165buf_softc *sc = arg;
    198 	struct tc5165buf_chip *scc = sc->sc_chip;
    199 
    200 	if (!scc->scc_enabled || scc->scc_queued)
    201 		return (0);
    202 
    203 	scc->scc_queued = 1;
    204 	callout_reset(&scc->scc_soft_ch, 1, tc5165buf_soft, scc);
    205 
    206 	return (0);
    207 }
    208 
    209 int
    210 tc5165buf_poll(void *arg)
    211 {
    212 	struct tc5165buf_chip *scc = arg;
    213 
    214 	if (!scc->scc_enabled)
    215 		return (POLL_CONT);
    216 
    217 	tc5165buf_soft(arg);
    218 
    219 	return (POLL_CONT);
    220 }
    221 
    222 void
    223 tc5165buf_soft(void *arg)
    224 {
    225 	struct tc5165buf_chip *scc = arg;
    226 	bus_space_tag_t t = scc->scc_cst;
    227 	bus_space_handle_t h = scc->scc_csh;
    228 	u_int16_t mask, rpat, edge;
    229 	int i, j, type, val;
    230 	int s;
    231 
    232 	hpckbd_input_hook(scc->scc_hpckbd);
    233 
    234 	/* clear scanlines */
    235 	(void)bus_space_read_2(t, h, 0);
    236 	delay(3);
    237 
    238 	for (i = 0; i < TC5165_COLUMN_MAX; i++) {
    239 		rpat = bus_space_read_2(t, h, 2 << i);
    240 		delay(3);
    241 		(void)bus_space_read_2(t, h, 0);
    242 		delay(3);
    243 		if ((edge = (rpat ^ scc->scc_buf[i]))) {
    244 			scc->scc_buf[i] = rpat;
    245 			for (j = 0, mask = 1; j < TC5165_ROW_MAX;
    246 			    j++, mask <<= 1) {
    247 				if (mask & edge) {
    248 					type = mask & rpat ? 1 : 0;
    249 					val = j * TC5165_COLUMN_MAX + i;
    250 					DPRINTF(("%d %d\n", j, i));
    251 					hpckbd_input(scc->scc_hpckbd,
    252 					    type, val);
    253 				}
    254 			}
    255 		}
    256 	}
    257 
    258 	s = spltty();
    259 	scc->scc_queued = 0;
    260 	splx(s);
    261 }
    262