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tc5165buf.c revision 1.6 
      1 /*	$NetBSD: tc5165buf.c,v 1.6 2000/09/21 14:17:29 takemura Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1999, 2000, by UCHIYAMA Yasushi
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. The name of the developer may NOT be used to endorse or promote products
     13  *    derived from this software without specific prior written permission.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  *
     27  */
     28 
     29 /*
     30  * Device driver for TOSHIBA TC5165BFTS, PHILIPS 74ALVC16241/245
     31  * buffer chip
     32  */
     33 
     34 #include "opt_tx39_debug.h"
     35 #include "opt_use_poll.h"
     36 
     37 #include <sys/param.h>
     38 #include <sys/systm.h>
     39 #include <sys/callout.h>
     40 #include <sys/device.h>
     41 
     42 #include <machine/bus.h>
     43 #include <machine/intr.h>
     44 
     45 #include <hpcmips/tx/tx39var.h>
     46 #include <hpcmips/tx/txcsbusvar.h>
     47 
     48 #include <hpcmips/dev/tc5165bufvar.h>
     49 #include <hpcmips/dev/hpckbdvar.h>
     50 
     51 #define TC5165_ROW_MAX		16
     52 #define TC5165_COLUMN_MAX	8
     53 
     54 #ifdef TC5165DEBUG
     55 #define	DPRINTF(arg) printf arg
     56 #else
     57 #define	DPRINTF(arg)
     58 #endif
     59 
     60 struct tc5165buf_chip {
     61 	bus_space_tag_t		scc_cst;
     62 	bus_space_handle_t	scc_csh;
     63 	u_int16_t		scc_buf[TC5165_COLUMN_MAX];
     64 	int			scc_enabled;
     65 	int			scc_queued;
     66 	struct callout		scc_soft_ch;
     67 	struct hpckbd_ic_if	scc_if;
     68 	struct hpckbd_if	*scc_hpckbd;
     69 };
     70 
     71 struct tc5165buf_softc {
     72 	struct device		sc_dev;
     73 	struct tc5165buf_chip	*sc_chip;
     74 	tx_chipset_tag_t	sc_tc;
     75 	void			*sc_ih;
     76 };
     77 
     78 int	tc5165buf_match	__P((struct device*, struct cfdata*, void*));
     79 void	tc5165buf_attach __P((struct device*, struct device*, void*));
     80 int	tc5165buf_intr __P((void*));
     81 int	tc5165buf_poll __P((void*));
     82 void	tc5165buf_soft __P((void*));
     83 void	tc5165buf_ifsetup __P((struct tc5165buf_chip*));
     84 
     85 int	tc5165buf_input_establish __P((void*, struct hpckbd_if*));
     86 
     87 struct tc5165buf_chip tc5165buf_chip;
     88 
     89 struct cfattach tc5165buf_ca = {
     90 	sizeof(struct tc5165buf_softc), tc5165buf_match, tc5165buf_attach
     91 };
     92 
     93 int
     94 tc5165buf_match(parent, cf, aux)
     95 	struct device *parent;
     96 	struct cfdata *cf;
     97 	void *aux;
     98 {
     99 	return 1;
    100 }
    101 
    102 void
    103 tc5165buf_attach(parent, self, aux)
    104 	struct device *parent;
    105 	struct device *self;
    106 	void *aux;
    107 {
    108 	struct cs_attach_args *ca = aux;
    109 	struct tc5165buf_softc *sc = (void*)self;
    110 	struct hpckbd_attach_args haa;
    111 
    112 	printf(": ");
    113 	sc->sc_tc = ca->ca_tc;
    114 	sc->sc_chip = &tc5165buf_chip;
    115 
    116 	callout_init(&sc->sc_chip->scc_soft_ch);
    117 
    118 	sc->sc_chip->scc_cst = ca->ca_csio.cstag;
    119 
    120 	if (bus_space_map(sc->sc_chip->scc_cst, ca->ca_csio.csbase,
    121 			  ca->ca_csio.cssize, 0, &sc->sc_chip->scc_csh)) {
    122 		printf("can't map i/o space\n");
    123 		return;
    124 	}
    125 
    126 	sc->sc_chip->scc_enabled = 0;
    127 
    128 	if (ca->ca_irq1 != -1) {
    129 		sc->sc_ih = tx_intr_establish(sc->sc_tc, ca->ca_irq1,
    130 					      IST_EDGE, IPL_TTY,
    131 					      tc5165buf_intr, sc);
    132 		printf("interrupt mode");
    133 	} else {
    134 		sc->sc_ih = tx39_poll_establish(sc->sc_tc, 1, IPL_TTY,
    135 						tc5165buf_intr, sc);
    136 		printf("polling mode");
    137 	}
    138 
    139 	if (!sc->sc_ih) {
    140 		printf(" can't establish interrupt\n");
    141 		return;
    142 	}
    143 
    144 	printf("\n");
    145 
    146 	/* setup upper interface */
    147 	tc5165buf_ifsetup(sc->sc_chip);
    148 
    149 	haa.haa_ic = &sc->sc_chip->scc_if;
    150 
    151 	config_found(self, &haa, hpckbd_print);
    152 }
    153 
    154 void
    155 tc5165buf_ifsetup(scc)
    156 	struct tc5165buf_chip *scc;
    157 {
    158 	scc->scc_if.hii_ctx		= scc;
    159 	scc->scc_if.hii_establish	= tc5165buf_input_establish;
    160 	scc->scc_if.hii_poll		= tc5165buf_poll;
    161 }
    162 
    163 int
    164 tc5165buf_cnattach(addr)
    165 	paddr_t addr;
    166 {
    167 	struct tc5165buf_chip *scc = &tc5165buf_chip;
    168 
    169 	scc->scc_csh = MIPS_PHYS_TO_KSEG1(addr);
    170 
    171 	tc5165buf_ifsetup(scc);
    172 
    173 	hpckbd_cnattach(&scc->scc_if);
    174 
    175 	return 0;
    176 }
    177 
    178 int
    179 tc5165buf_input_establish(ic, kbdif)
    180 	void *ic;
    181 	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(arg)
    195 	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(arg)
    211 	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(arg)
    225 	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