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tc5165buf.c revision 1.12 
      1 /*	$NetBSD: tc5165buf.c,v 1.12 2003/07/15 02:29:30 lukem 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 <sys/cdefs.h>
     45 __KERNEL_RCSID(0, "$NetBSD: tc5165buf.c,v 1.12 2003/07/15 02:29:30 lukem Exp $");
     46 
     47 #include "opt_use_poll.h"
     48 
     49 #include <sys/param.h>
     50 #include <sys/systm.h>
     51 #include <sys/callout.h>
     52 #include <sys/device.h>
     53 
     54 #include <machine/bus.h>
     55 #include <machine/intr.h>
     56 
     57 #include <dev/hpc/hpckbdvar.h>
     58 
     59 #include <hpcmips/tx/tx39var.h>
     60 #include <hpcmips/tx/txcsbusvar.h>
     61 #include <hpcmips/dev/tc5165bufvar.h>
     62 
     63 #define TC5165_ROW_MAX		16
     64 #define TC5165_COLUMN_MAX	8
     65 
     66 #ifdef TC5165DEBUG
     67 #define	DPRINTF(arg) printf arg
     68 #else
     69 #define	DPRINTF(arg)
     70 #endif
     71 
     72 struct tc5165buf_chip {
     73 	bus_space_tag_t		scc_cst;
     74 	bus_space_handle_t	scc_csh;
     75 	u_int16_t		scc_buf[TC5165_COLUMN_MAX];
     76 	int			scc_enabled;
     77 	int			scc_queued;
     78 	struct callout		scc_soft_ch;
     79 	struct hpckbd_ic_if	scc_if;
     80 	struct hpckbd_if	*scc_hpckbd;
     81 };
     82 
     83 struct tc5165buf_softc {
     84 	struct device		sc_dev;
     85 	struct tc5165buf_chip	*sc_chip;
     86 	tx_chipset_tag_t	sc_tc;
     87 	void			*sc_ih;
     88 };
     89 
     90 int	tc5165buf_match(struct device *, struct cfdata *, void *);
     91 void	tc5165buf_attach(struct device *, struct device *, void *);
     92 int	tc5165buf_intr(void *);
     93 int	tc5165buf_poll(void *);
     94 void	tc5165buf_soft(void *);
     95 void	tc5165buf_ifsetup(struct tc5165buf_chip *);
     96 
     97 int	tc5165buf_input_establish(void *, struct hpckbd_if *);
     98 
     99 struct tc5165buf_chip tc5165buf_chip;
    100 
    101 CFATTACH_DECL(tc5165buf, sizeof(struct tc5165buf_softc),
    102     tc5165buf_match, tc5165buf_attach, NULL, NULL);
    103 
    104 int
    105 tc5165buf_match(struct device *parent, struct cfdata *cf, void *aux)
    106 {
    107 
    108 	return (1);
    109 }
    110 
    111 void
    112 tc5165buf_attach(struct device *parent, struct device *self, void *aux)
    113 {
    114 	struct cs_attach_args *ca = aux;
    115 	struct tc5165buf_softc *sc = (void*)self;
    116 	struct hpckbd_attach_args haa;
    117 
    118 	printf(": ");
    119 	sc->sc_tc = ca->ca_tc;
    120 	sc->sc_chip = &tc5165buf_chip;
    121 
    122 	callout_init(&sc->sc_chip->scc_soft_ch);
    123 
    124 	sc->sc_chip->scc_cst = ca->ca_csio.cstag;
    125 
    126 	if (bus_space_map(sc->sc_chip->scc_cst, ca->ca_csio.csbase,
    127 	    ca->ca_csio.cssize, 0, &sc->sc_chip->scc_csh)) {
    128 		printf("can't map i/o space\n");
    129 		return;
    130 	}
    131 
    132 	sc->sc_chip->scc_enabled = 0;
    133 
    134 	if (ca->ca_irq1 != -1) {
    135 		sc->sc_ih = tx_intr_establish(sc->sc_tc, ca->ca_irq1,
    136 		    IST_EDGE, IPL_TTY,
    137 		    tc5165buf_intr, sc);
    138 		printf("interrupt mode");
    139 	} else {
    140 		sc->sc_ih = tx39_poll_establish(sc->sc_tc, 1, IPL_TTY,
    141 		    tc5165buf_intr, sc);
    142 		printf("polling mode");
    143 	}
    144 
    145 	if (!sc->sc_ih) {
    146 		printf(" can't establish interrupt\n");
    147 		return;
    148 	}
    149 
    150 	printf("\n");
    151 
    152 	/* setup upper interface */
    153 	tc5165buf_ifsetup(sc->sc_chip);
    154 
    155 	haa.haa_ic = &sc->sc_chip->scc_if;
    156 
    157 	config_found(self, &haa, hpckbd_print);
    158 }
    159 
    160 void
    161 tc5165buf_ifsetup(struct tc5165buf_chip *scc)
    162 {
    163 
    164 	scc->scc_if.hii_ctx		= scc;
    165 	scc->scc_if.hii_establish	= tc5165buf_input_establish;
    166 	scc->scc_if.hii_poll		= tc5165buf_poll;
    167 }
    168 
    169 int
    170 tc5165buf_cnattach(paddr_t addr)
    171 {
    172 	struct tc5165buf_chip *scc = &tc5165buf_chip;
    173 
    174 	scc->scc_csh = MIPS_PHYS_TO_KSEG1(addr);
    175 
    176 	tc5165buf_ifsetup(scc);
    177 
    178 	hpckbd_cnattach(&scc->scc_if);
    179 
    180 	return (0);
    181 }
    182 
    183 int
    184 tc5165buf_input_establish(void *ic, struct hpckbd_if *kbdif)
    185 {
    186 	struct tc5165buf_chip *scc = ic;
    187 
    188 	/* save hpckbd interface */
    189 	scc->scc_hpckbd = kbdif;
    190 
    191 	scc->scc_enabled = 1;
    192 
    193 	return (0);
    194 }
    195 
    196 int
    197 tc5165buf_intr(void *arg)
    198 {
    199 	struct tc5165buf_softc *sc = arg;
    200 	struct tc5165buf_chip *scc = sc->sc_chip;
    201 
    202 	if (!scc->scc_enabled || scc->scc_queued)
    203 		return (0);
    204 
    205 	scc->scc_queued = 1;
    206 	callout_reset(&scc->scc_soft_ch, 1, tc5165buf_soft, scc);
    207 
    208 	return (0);
    209 }
    210 
    211 int
    212 tc5165buf_poll(void *arg)
    213 {
    214 	struct tc5165buf_chip *scc = arg;
    215 
    216 	if (!scc->scc_enabled)
    217 		return (POLL_CONT);
    218 
    219 	tc5165buf_soft(arg);
    220 
    221 	return (POLL_CONT);
    222 }
    223 
    224 void
    225 tc5165buf_soft(void *arg)
    226 {
    227 	struct tc5165buf_chip *scc = arg;
    228 	bus_space_tag_t t = scc->scc_cst;
    229 	bus_space_handle_t h = scc->scc_csh;
    230 	u_int16_t mask, rpat, edge;
    231 	int i, j, type, val;
    232 	int s;
    233 
    234 	hpckbd_input_hook(scc->scc_hpckbd);
    235 
    236 	/* clear scanlines */
    237 	(void)bus_space_read_2(t, h, 0);
    238 	delay(3);
    239 
    240 	for (i = 0; i < TC5165_COLUMN_MAX; i++) {
    241 		rpat = bus_space_read_2(t, h, 2 << i);
    242 		delay(3);
    243 		(void)bus_space_read_2(t, h, 0);
    244 		delay(3);
    245 		if ((edge = (rpat ^ scc->scc_buf[i]))) {
    246 			scc->scc_buf[i] = rpat;
    247 			for (j = 0, mask = 1; j < TC5165_ROW_MAX;
    248 			    j++, mask <<= 1) {
    249 				if (mask & edge) {
    250 					type = mask & rpat ? 1 : 0;
    251 					val = j * TC5165_COLUMN_MAX + i;
    252 					DPRINTF(("%d %d\n", j, i));
    253 					hpckbd_input(scc->scc_hpckbd,
    254 					    type, val);
    255 				}
    256 			}
    257 		}
    258 	}
    259 
    260 	s = spltty();
    261 	scc->scc_queued = 0;
    262 	splx(s);
    263 }
    264