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tc5165buf.c revision 1.8.4.3 
      1 /*	$NetBSD: tc5165buf.c,v 1.8.4.3 2002/10/18 02:37:07 nathanw 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 CFATTACH_DECL(tc5165buf, sizeof(struct tc5165buf_softc),
     99     tc5165buf_match, tc5165buf_attach, NULL, NULL);
    100 
    101 int
    102 tc5165buf_match(struct device *parent, struct cfdata *cf, void *aux)
    103 {
    104 
    105 	return (1);
    106 }
    107 
    108 void
    109 tc5165buf_attach(struct device *parent, struct device *self, void *aux)
    110 {
    111 	struct cs_attach_args *ca = aux;
    112 	struct tc5165buf_softc *sc = (void*)self;
    113 	struct hpckbd_attach_args haa;
    114 
    115 	printf(": ");
    116 	sc->sc_tc = ca->ca_tc;
    117 	sc->sc_chip = &tc5165buf_chip;
    118 
    119 	callout_init(&sc->sc_chip->scc_soft_ch);
    120 
    121 	sc->sc_chip->scc_cst = ca->ca_csio.cstag;
    122 
    123 	if (bus_space_map(sc->sc_chip->scc_cst, ca->ca_csio.csbase,
    124 	    ca->ca_csio.cssize, 0, &sc->sc_chip->scc_csh)) {
    125 		printf("can't map i/o space\n");
    126 		return;
    127 	}
    128 
    129 	sc->sc_chip->scc_enabled = 0;
    130 
    131 	if (ca->ca_irq1 != -1) {
    132 		sc->sc_ih = tx_intr_establish(sc->sc_tc, ca->ca_irq1,
    133 		    IST_EDGE, IPL_TTY,
    134 		    tc5165buf_intr, sc);
    135 		printf("interrupt mode");
    136 	} else {
    137 		sc->sc_ih = tx39_poll_establish(sc->sc_tc, 1, IPL_TTY,
    138 		    tc5165buf_intr, sc);
    139 		printf("polling mode");
    140 	}
    141 
    142 	if (!sc->sc_ih) {
    143 		printf(" can't establish interrupt\n");
    144 		return;
    145 	}
    146 
    147 	printf("\n");
    148 
    149 	/* setup upper interface */
    150 	tc5165buf_ifsetup(sc->sc_chip);
    151 
    152 	haa.haa_ic = &sc->sc_chip->scc_if;
    153 
    154 	config_found(self, &haa, hpckbd_print);
    155 }
    156 
    157 void
    158 tc5165buf_ifsetup(struct tc5165buf_chip *scc)
    159 {
    160 
    161 	scc->scc_if.hii_ctx		= scc;
    162 	scc->scc_if.hii_establish	= tc5165buf_input_establish;
    163 	scc->scc_if.hii_poll		= tc5165buf_poll;
    164 }
    165 
    166 int
    167 tc5165buf_cnattach(paddr_t addr)
    168 {
    169 	struct tc5165buf_chip *scc = &tc5165buf_chip;
    170 
    171 	scc->scc_csh = MIPS_PHYS_TO_KSEG1(addr);
    172 
    173 	tc5165buf_ifsetup(scc);
    174 
    175 	hpckbd_cnattach(&scc->scc_if);
    176 
    177 	return (0);
    178 }
    179 
    180 int
    181 tc5165buf_input_establish(void *ic, struct hpckbd_if *kbdif)
    182 {
    183 	struct tc5165buf_chip *scc = ic;
    184 
    185 	/* save hpckbd interface */
    186 	scc->scc_hpckbd = kbdif;
    187 
    188 	scc->scc_enabled = 1;
    189 
    190 	return (0);
    191 }
    192 
    193 int
    194 tc5165buf_intr(void *arg)
    195 {
    196 	struct tc5165buf_softc *sc = arg;
    197 	struct tc5165buf_chip *scc = sc->sc_chip;
    198 
    199 	if (!scc->scc_enabled || scc->scc_queued)
    200 		return (0);
    201 
    202 	scc->scc_queued = 1;
    203 	callout_reset(&scc->scc_soft_ch, 1, tc5165buf_soft, scc);
    204 
    205 	return (0);
    206 }
    207 
    208 int
    209 tc5165buf_poll(void *arg)
    210 {
    211 	struct tc5165buf_chip *scc = arg;
    212 
    213 	if (!scc->scc_enabled)
    214 		return (POLL_CONT);
    215 
    216 	tc5165buf_soft(arg);
    217 
    218 	return (POLL_CONT);
    219 }
    220 
    221 void
    222 tc5165buf_soft(void *arg)
    223 {
    224 	struct tc5165buf_chip *scc = arg;
    225 	bus_space_tag_t t = scc->scc_cst;
    226 	bus_space_handle_t h = scc->scc_csh;
    227 	u_int16_t mask, rpat, edge;
    228 	int i, j, type, val;
    229 	int s;
    230 
    231 	hpckbd_input_hook(scc->scc_hpckbd);
    232 
    233 	/* clear scanlines */
    234 	(void)bus_space_read_2(t, h, 0);
    235 	delay(3);
    236 
    237 	for (i = 0; i < TC5165_COLUMN_MAX; i++) {
    238 		rpat = bus_space_read_2(t, h, 2 << i);
    239 		delay(3);
    240 		(void)bus_space_read_2(t, h, 0);
    241 		delay(3);
    242 		if ((edge = (rpat ^ scc->scc_buf[i]))) {
    243 			scc->scc_buf[i] = rpat;
    244 			for (j = 0, mask = 1; j < TC5165_ROW_MAX;
    245 			    j++, mask <<= 1) {
    246 				if (mask & edge) {
    247 					type = mask & rpat ? 1 : 0;
    248 					val = j * TC5165_COLUMN_MAX + i;
    249 					DPRINTF(("%d %d\n", j, i));
    250 					hpckbd_input(scc->scc_hpckbd,
    251 					    type, val);
    252 				}
    253 			}
    254 		}
    255 	}
    256 
    257 	s = spltty();
    258 	scc->scc_queued = 0;
    259 	splx(s);
    260 }
    261