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tc5165buf.c revision 1.8 
      1 /*	$NetBSD: tc5165buf.c,v 1.8 2001/09/15 12:47:07 uch 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_tx39_debug.h"
     45 #include "opt_use_poll.h"
     46 
     47 #include <sys/param.h>
     48 #include <sys/systm.h>
     49 #include <sys/callout.h>
     50 #include <sys/device.h>
     51 
     52 #include <machine/bus.h>
     53 #include <machine/intr.h>
     54 
     55 #include <dev/hpc/hpckbdvar.h>
     56 
     57 #include <hpcmips/tx/tx39var.h>
     58 #include <hpcmips/tx/txcsbusvar.h>
     59 #include <hpcmips/dev/tc5165bufvar.h>
     60 
     61 #define TC5165_ROW_MAX		16
     62 #define TC5165_COLUMN_MAX	8
     63 
     64 #ifdef TC5165DEBUG
     65 #define	DPRINTF(arg) printf arg
     66 #else
     67 #define	DPRINTF(arg)
     68 #endif
     69 
     70 struct tc5165buf_chip {
     71 	bus_space_tag_t		scc_cst;
     72 	bus_space_handle_t	scc_csh;
     73 	u_int16_t		scc_buf[TC5165_COLUMN_MAX];
     74 	int			scc_enabled;
     75 	int			scc_queued;
     76 	struct callout		scc_soft_ch;
     77 	struct hpckbd_ic_if	scc_if;
     78 	struct hpckbd_if	*scc_hpckbd;
     79 };
     80 
     81 struct tc5165buf_softc {
     82 	struct device		sc_dev;
     83 	struct tc5165buf_chip	*sc_chip;
     84 	tx_chipset_tag_t	sc_tc;
     85 	void			*sc_ih;
     86 };
     87 
     88 int	tc5165buf_match(struct device *, struct cfdata *, void *);
     89 void	tc5165buf_attach(struct device *, struct device *, void *);
     90 int	tc5165buf_intr(void *);
     91 int	tc5165buf_poll(void *);
     92 void	tc5165buf_soft(void *);
     93 void	tc5165buf_ifsetup(struct tc5165buf_chip *);
     94 
     95 int	tc5165buf_input_establish(void *, struct hpckbd_if *);
     96 
     97 struct tc5165buf_chip tc5165buf_chip;
     98 
     99 struct cfattach tc5165buf_ca = {
    100 	sizeof(struct tc5165buf_softc), tc5165buf_match, tc5165buf_attach
    101 };
    102 
    103 int
    104 tc5165buf_match(struct device *parent, struct cfdata *cf, void *aux)
    105 {
    106 
    107 	return (1);
    108 }
    109 
    110 void
    111 tc5165buf_attach(struct device *parent, struct device *self, void *aux)
    112 {
    113 	struct cs_attach_args *ca = aux;
    114 	struct tc5165buf_softc *sc = (void*)self;
    115 	struct hpckbd_attach_args haa;
    116 
    117 	printf(": ");
    118 	sc->sc_tc = ca->ca_tc;
    119 	sc->sc_chip = &tc5165buf_chip;
    120 
    121 	callout_init(&sc->sc_chip->scc_soft_ch);
    122 
    123 	sc->sc_chip->scc_cst = ca->ca_csio.cstag;
    124 
    125 	if (bus_space_map(sc->sc_chip->scc_cst, ca->ca_csio.csbase,
    126 	    ca->ca_csio.cssize, 0, &sc->sc_chip->scc_csh)) {
    127 		printf("can't map i/o space\n");
    128 		return;
    129 	}
    130 
    131 	sc->sc_chip->scc_enabled = 0;
    132 
    133 	if (ca->ca_irq1 != -1) {
    134 		sc->sc_ih = tx_intr_establish(sc->sc_tc, ca->ca_irq1,
    135 		    IST_EDGE, IPL_TTY,
    136 		    tc5165buf_intr, sc);
    137 		printf("interrupt mode");
    138 	} else {
    139 		sc->sc_ih = tx39_poll_establish(sc->sc_tc, 1, IPL_TTY,
    140 		    tc5165buf_intr, sc);
    141 		printf("polling mode");
    142 	}
    143 
    144 	if (!sc->sc_ih) {
    145 		printf(" can't establish interrupt\n");
    146 		return;
    147 	}
    148 
    149 	printf("\n");
    150 
    151 	/* setup upper interface */
    152 	tc5165buf_ifsetup(sc->sc_chip);
    153 
    154 	haa.haa_ic = &sc->sc_chip->scc_if;
    155 
    156 	config_found(self, &haa, hpckbd_print);
    157 }
    158 
    159 void
    160 tc5165buf_ifsetup(struct tc5165buf_chip *scc)
    161 {
    162 
    163 	scc->scc_if.hii_ctx		= scc;
    164 	scc->scc_if.hii_establish	= tc5165buf_input_establish;
    165 	scc->scc_if.hii_poll		= tc5165buf_poll;
    166 }
    167 
    168 int
    169 tc5165buf_cnattach(paddr_t addr)
    170 {
    171 	struct tc5165buf_chip *scc = &tc5165buf_chip;
    172 
    173 	scc->scc_csh = MIPS_PHYS_TO_KSEG1(addr);
    174 
    175 	tc5165buf_ifsetup(scc);
    176 
    177 	hpckbd_cnattach(&scc->scc_if);
    178 
    179 	return (0);
    180 }
    181 
    182 int
    183 tc5165buf_input_establish(void *ic, struct hpckbd_if *kbdif)
    184 {
    185 	struct tc5165buf_chip *scc = ic;
    186 
    187 	/* save hpckbd interface */
    188 	scc->scc_hpckbd = kbdif;
    189 
    190 	scc->scc_enabled = 1;
    191 
    192 	return (0);
    193 }
    194 
    195 int
    196 tc5165buf_intr(void *arg)
    197 {
    198 	struct tc5165buf_softc *sc = arg;
    199 	struct tc5165buf_chip *scc = sc->sc_chip;
    200 
    201 	if (!scc->scc_enabled || scc->scc_queued)
    202 		return (0);
    203 
    204 	scc->scc_queued = 1;
    205 	callout_reset(&scc->scc_soft_ch, 1, tc5165buf_soft, scc);
    206 
    207 	return (0);
    208 }
    209 
    210 int
    211 tc5165buf_poll(void *arg)
    212 {
    213 	struct tc5165buf_chip *scc = arg;
    214 
    215 	if (!scc->scc_enabled)
    216 		return (POLL_CONT);
    217 
    218 	tc5165buf_soft(arg);
    219 
    220 	return (POLL_CONT);
    221 }
    222 
    223 void
    224 tc5165buf_soft(void *arg)
    225 {
    226 	struct tc5165buf_chip *scc = arg;
    227 	bus_space_tag_t t = scc->scc_cst;
    228 	bus_space_handle_t h = scc->scc_csh;
    229 	u_int16_t mask, rpat, edge;
    230 	int i, j, type, val;
    231 	int s;
    232 
    233 	hpckbd_input_hook(scc->scc_hpckbd);
    234 
    235 	/* clear scanlines */
    236 	(void)bus_space_read_2(t, h, 0);
    237 	delay(3);
    238 
    239 	for (i = 0; i < TC5165_COLUMN_MAX; i++) {
    240 		rpat = bus_space_read_2(t, h, 2 << i);
    241 		delay(3);
    242 		(void)bus_space_read_2(t, h, 0);
    243 		delay(3);
    244 		if ((edge = (rpat ^ scc->scc_buf[i]))) {
    245 			scc->scc_buf[i] = rpat;
    246 			for (j = 0, mask = 1; j < TC5165_ROW_MAX;
    247 			    j++, mask <<= 1) {
    248 				if (mask & edge) {
    249 					type = mask & rpat ? 1 : 0;
    250 					val = j * TC5165_COLUMN_MAX + i;
    251 					DPRINTF(("%d %d\n", j, i));
    252 					hpckbd_input(scc->scc_hpckbd,
    253 					    type, val);
    254 				}
    255 			}
    256 		}
    257 	}
    258 
    259 	s = spltty();
    260 	scc->scc_queued = 0;
    261 	splx(s);
    262 }
    263