1 /* $NetBSD: gb225.c,v 1.7 2007/10/17 19:54:12 garbled Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003 Genetec corp. All rights reserved. 5 * Written by Hiroyuki Bessho for Genetec corp. 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. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of Genetec corp. may not be used to endorse 16 * or promote products derived from this software without specific prior 17 * written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY GENETEC CORP. ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORP. 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/device.h> 36 #include <sys/kernel.h> 37 #include <sys/reboot.h> 38 39 #include <machine/cpu.h> 40 #include <machine/bus.h> 41 #include <machine/intr.h> 42 #include <arm/cpufunc.h> 43 44 #include <arm/mainbus/mainbus.h> 45 #include <arm/xscale/pxa2x0reg.h> 46 #include <arm/xscale/pxa2x0var.h> 47 #include <arm/xscale/pxa2x0_gpio.h> 48 #include <arm/sa11x0/sa11x0_var.h> 49 #include <evbarm/g42xxeb/g42xxeb_reg.h> 50 #include <evbarm/g42xxeb/g42xxeb_var.h> 51 #include <evbarm/g42xxeb/gb225reg.h> 52 #include <evbarm/g42xxeb/gb225var.h> 53 54 #include "locators.h" 55 56 #define OPIO_INTR G42XXEB_INT_EXT3 57 58 59 #define DEBOUNCE_COUNT 2 60 #define DEBOUNCE_TICKS (hz/20) /* 50ms */ 61 62 /* prototypes */ 63 static int opio_match(struct device *, struct cfdata *, void *); 64 static void opio_attach(struct device *, struct device *, void *); 65 static int opio_search(struct device *, struct cfdata *, 66 const int *, void *); 67 static int opio_print(void *, const char *); 68 #ifdef OPIO_INTR 69 static int opio_intr( void *arg ); 70 static void opio_debounce(void *arg); 71 #endif 72 73 74 /* attach structures */ 75 CFATTACH_DECL(opio, sizeof(struct opio_softc), opio_match, opio_attach, 76 NULL, NULL); 77 78 /* 79 * int opio_print(void *aux, const char *name) 80 * print configuration info for children 81 */ 82 83 static int 84 opio_print(void *aux, const char *name) 85 { 86 struct obio_attach_args *oba = (struct obio_attach_args*)aux; 87 88 if (oba->oba_addr != OPIOCF_ADDR_DEFAULT) 89 aprint_normal(" addr 0x%lx", oba->oba_addr); 90 return (UNCONF); 91 } 92 93 int 94 opio_match(struct device *parent, struct cfdata *match, void *aux) 95 { 96 struct obio_softc *psc = (struct obio_softc *)parent; 97 uint16_t optid; 98 99 optid = bus_space_read_2(psc->sc_iot, psc->sc_obioreg_ioh, 100 G42XXEB_OPTBRDID); 101 102 return optid == 0x01; 103 } 104 105 void 106 opio_attach(struct device *parent, struct device *self, void *aux) 107 { 108 struct opio_softc *sc = (struct opio_softc*)self; 109 struct obio_softc *bsc = (struct obio_softc *)parent; 110 struct obio_attach_args *oba = aux; 111 uint32_t reg; 112 int i; 113 bus_space_tag_t iot; 114 bus_space_handle_t memctl_ioh = bsc->sc_memctl_ioh; 115 116 iot = oba->oba_iot; 117 sc->sc_iot = iot; 118 sc->sc_memctl_ioh = memctl_ioh; 119 120 /* use 16bit access for CS4, 32bit for CS5 */ 121 reg = bus_space_read_4(iot, memctl_ioh, MEMCTL_MSC2); 122 reg |= MSC_RBW; 123 reg &= ~(MSC_RBW<<16); 124 /* XXX: set access timing */ 125 bus_space_write_4(iot, memctl_ioh, MEMCTL_MSC2, reg); 126 127 /* Set alternative function for GPIO pings 48..57 on PXA2X0 */ 128 #if 0 129 reg = bus_space_read_4(iot, csc->saip.sc_gpioh, GPIO_GPDR1); 130 bus_space_write_4(iot, csc->saip.sc_gpioh, GPIO_GPDR1, 131 (reg & ~0x03ff0000) | 0x00ff0000); 132 reg = bus_space_read_4(iot, csc->saip.sc_gpioh, GPIO_GAFR1_U); 133 bus_space_write_4(iot, csc->saip.sc_gpioh, GPIO_GAFR1_U, 134 (reg & ~0x000fffff) | 0x0005aaaa ); 135 #else 136 for (i=47; i <= 55; ++i) 137 pxa2x0_gpio_set_function(i, GPIO_ALT_FN_2_OUT); 138 pxa2x0_gpio_set_function(56, GPIO_ALT_FN_1_IN); 139 pxa2x0_gpio_set_function(57, GPIO_ALT_FN_1_IN); 140 #endif 141 142 /* Enable bus switch for option board */ 143 reg = bus_space_read_2(iot, bsc->sc_obioreg_ioh, G42XXEB_EXTCTRL); 144 bus_space_write_2(iot, bsc->sc_obioreg_ioh, G42XXEB_EXTCTRL, reg | 3); 145 146 /* Map on-board FPGA registers */ 147 if( bus_space_map( iot, GB225_PLDREG_BASE, GB225_PLDREG_SIZE, 148 0, &(sc->sc_ioh) ) ){ 149 aprint_error("%s: can't map FPGA registers\n", self->dv_xname); 150 } 151 152 aprint_normal("\n"); 153 154 callout_init(&sc->sc_callout, 0); 155 156 for (i=0; i < N_OPIO_INTR; ++i) { 157 sc->sc_intr[i].func = NULL; 158 sc->sc_intr[i].reported_state = 0xff; 159 sc->sc_intr[i].last_state = 0xff; 160 } 161 162 #ifdef OPIO_INTR 163 sc->sc_ih = obio_intr_establish(bsc, OPIO_INTR, IPL_BIO, 164 IST_EDGE_FALLING, opio_intr, sc); 165 #endif 166 167 #ifdef DEBUG 168 printf("%s: CF_DET=%x PCMCIA_DET=%x\n", 169 self->dv_xname, 170 bus_space_read_1(sc->sc_iot, sc->sc_ioh, GB225_CFDET), 171 bus_space_read_1(sc->sc_iot, sc->sc_ioh, GB225_PCMCIADET)); 172 #endif 173 174 /* 175 * Attach each devices 176 */ 177 config_search_ia(opio_search, self, "opio", NULL); 178 } 179 180 int 181 opio_search(struct device *parent, struct cfdata *cf, 182 const int *ldesc, void *aux) 183 { 184 struct opio_softc *sc = (struct opio_softc *)parent; 185 struct obio_attach_args oba; 186 187 oba.oba_sc = sc; 188 oba.oba_iot = sc->sc_iot; 189 oba.oba_addr = cf->cf_loc[OPIOCF_ADDR]; 190 oba.oba_intr = cf->cf_loc[OPIOCF_INTR]; 191 192 if (config_match(parent, cf, &oba) > 0) 193 config_attach(parent, cf, &oba, opio_print); 194 195 return 0; 196 } 197 198 void * 199 opio_intr_establish(struct opio_softc *sc, int intr, int ipl, 200 int (*func)(void *, int), void *arg) 201 { 202 sc->sc_intr[intr].arg = arg; 203 sc->sc_intr[intr].func = func; 204 205 return &sc->sc_intr[intr]; 206 } 207 208 209 #ifdef OPIO_INTR 210 /* 211 * interrupt handler for option board. interrupt sources are: 212 * CF card insertion/removal. 213 * PCMCIA card insertion/removal. 214 * USB power failure. 215 * CF/PCMCIA power failure. 216 * We need to debounce for CF/PCMCIA card insertion/removal signal. 217 */ 218 static int 219 opio_intr( void *arg ) 220 { 221 struct opio_softc *sc = (struct opio_softc *)arg; 222 struct obio_softc *bsc = 223 (struct obio_softc *)device_parent(&sc->sc_dev); 224 225 /* avoid further interrupts while debouncing */ 226 obio_intr_mask(bsc, sc->sc_ih); 227 228 printf("OPIO "); 229 230 if (sc->sc_debounce == ST_STABLE) { 231 /* start debounce timer */ 232 callout_reset(&sc->sc_callout, DEBOUNCE_TICKS, 233 opio_debounce, sc); 234 sc->sc_debounce = ST_BOUNCING; 235 } 236 237 return 1; 238 } 239 240 241 static int 242 do_debounce(struct opio_softc *sc, int intr, int val, int count) 243 { 244 int s; 245 246 247 struct opio_intr_handler *p = &sc->sc_intr[intr]; 248 249 if (p->last_state != val) { 250 p->debounce_count = 0; 251 p->last_state = val; 252 return 1; 253 } 254 else if (p->debounce_count++ < count) 255 return 1; 256 else { 257 /* debounce done. if status has changed, report it */ 258 if (p->reported_state != val) { 259 p->reported_state = val; 260 if (p->func) { 261 s = _splraise(p->level); 262 p->func(p->arg, val); 263 splx(s); 264 } 265 } 266 return 0; 267 } 268 /*NOTREACHED*/ 269 } 270 271 static void 272 opio_debounce(void *arg) 273 { 274 struct opio_softc *sc = arg; 275 struct obio_softc *osc = 276 (struct obio_softc *)device_parent(&sc->sc_dev); 277 bus_space_tag_t iot = sc->sc_iot; 278 bus_space_handle_t ioh = sc->sc_ioh; 279 int flag = 0; 280 uint8_t reg; 281 282 reg = bus_space_read_1(iot, ioh, GB225_CFDET) & CARDDET_DET; 283 flag |= do_debounce(sc, OPIO_INTR_CF_INSERT, reg, DEBOUNCE_COUNT); 284 285 reg = bus_space_read_1(iot, ioh, GB225_PCMCIADET) & CARDDET_DET; 286 flag |= do_debounce(sc, OPIO_INTR_PCMCIA_INSERT, reg, DEBOUNCE_COUNT); 287 288 reg = bus_space_read_1(iot, ioh, GB225_DEVERROR); 289 290 flag |= do_debounce(sc, OPIO_INTR_USB_POWER, reg & DEVERROR_USB, 1); 291 292 flag |= do_debounce(sc, OPIO_INTR_CARD_POWER, reg & DEVERROR_CARD, 1); 293 294 295 if (flag) { 296 /* start debounce timer */ 297 callout_reset(&sc->sc_callout, DEBOUNCE_TICKS, 298 opio_debounce, sc); 299 } 300 else { 301 sc->sc_debounce = ST_STABLE; 302 obio_intr_unmask(osc, sc->sc_ih); 303 } 304 } 305 #endif 306