1 /* $NetBSD: lcdctl.c,v 1.3 2012/01/29 10:12:41 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (C) 2012 NONAKA Kimihiro <nonaka (at) netbsd.org> 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. 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: lcdctl.c,v 1.3 2012/01/29 10:12:41 tsutsui Exp $"); 30 31 #include "ioexp.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/device.h> 36 #include <sys/bus.h> 37 38 #include <dev/wscons/wsconsio.h> 39 #include <dev/wscons/wsdisplayvar.h> 40 41 #include <zaurus/zaurus/zaurus_var.h> 42 #include <zaurus/dev/lcdctlvar.h> 43 #include <zaurus/dev/zsspvar.h> 44 #include <zaurus/dev/scoopvar.h> 45 #include <zaurus/dev/ioexpvar.h> 46 47 struct lcdctl_backlight { 48 int duty; /* LZ9JG18 DAC value */ 49 int cont; /* BACKLIGHT_CONT signal */ 50 int on; /* BACKLIGHT_ON signal */ 51 }; 52 53 struct lcdctl_softc { 54 device_t sc_dev; 55 56 int sc_brightness; 57 int sc_brightnesscurval; 58 bool sc_islit; 59 bool sc_isblank; 60 61 int sc_nbacklighttbl; 62 const struct lcdctl_backlight *sc_backlighttbl; 63 }; 64 65 /* for SL-C1000/SL-C3x00 */ 66 static const struct lcdctl_backlight lcdctl_backlight_c3000[] = { 67 { 0x00, 0, 0 }, /* 0: Off */ 68 { 0x00, 0, 1 }, /* 1: 0% */ 69 { 0x01, 0, 1 }, /* 2: 20% */ 70 { 0x07, 0, 1 }, /* 3: 40% */ 71 { 0x01, 1, 1 }, /* 4: 60% */ 72 { 0x07, 1, 1 }, /* 5: 80% */ 73 { 0x11, 1, 1 } /* 6: 100% */ 74 }; 75 76 static int lcdctl_match(device_t, cfdata_t, void *); 77 static void lcdctl_attach(device_t, device_t, void *); 78 79 CFATTACH_DECL_NEW(lcdctl, sizeof(struct lcdctl_softc), 80 lcdctl_match, lcdctl_attach, NULL, NULL); 81 82 static void lcdctl_brightness_up(device_t); 83 static void lcdctl_brightness_down(device_t); 84 static void lcdctl_display_on(device_t); 85 static void lcdctl_display_off(device_t); 86 87 static void lcdctl_set_brightness(struct lcdctl_softc *, int); 88 static void lcdctl_set_blank(struct lcdctl_softc *, bool); 89 static void lcdctl_set_backlight(struct lcdctl_softc *, bool); 90 91 static struct lcdctl_softc *lcdctl_sc; 92 93 static int 94 lcdctl_match(device_t parent, cfdata_t cf, void *aux) 95 { 96 struct zssp_attach_args *aa = aux; 97 98 if (strcmp("lcdctl", aa->zaa_name)) 99 return 0; 100 101 return 1; 102 } 103 104 static void 105 lcdctl_attach(device_t parent, device_t self, void *aux) 106 { 107 struct lcdctl_softc *sc = device_private(self); 108 109 sc->sc_dev = self; 110 111 aprint_normal("\n"); 112 aprint_naive("\n"); 113 114 sc->sc_brightness = sc->sc_brightnesscurval = 1; 115 sc->sc_islit = true; 116 sc->sc_isblank = false; 117 118 if (ZAURUS_ISC1000 || ZAURUS_ISC3000) { 119 sc->sc_nbacklighttbl = __arraycount(lcdctl_backlight_c3000); 120 sc->sc_backlighttbl = lcdctl_backlight_c3000; 121 } else { 122 /* XXX: Is this okay for C7x0/860? */ 123 sc->sc_nbacklighttbl = __arraycount(lcdctl_backlight_c3000); 124 sc->sc_backlighttbl = lcdctl_backlight_c3000; 125 } 126 127 /* Start with approximately 40% of full brightness. */ 128 lcdctl_set_brightness(sc, 3); 129 130 lcdctl_sc = sc; 131 132 if (!pmf_event_register(self, PMFE_DISPLAY_BRIGHTNESS_UP, 133 lcdctl_brightness_up, true)) 134 aprint_error_dev(self, "couldn't register event handler\n"); 135 if (!pmf_event_register(self, PMFE_DISPLAY_BRIGHTNESS_DOWN, 136 lcdctl_brightness_down, true)) 137 aprint_error_dev(self, "couldn't register event handler\n"); 138 if (!pmf_event_register(self, PMFE_DISPLAY_ON, 139 lcdctl_display_on, true)) 140 aprint_error_dev(self, "couldn't register event handler\n"); 141 if (!pmf_event_register(self, PMFE_DISPLAY_OFF, 142 lcdctl_display_off, true)) 143 aprint_error_dev(self, "couldn't register event handler\n"); 144 } 145 146 static void 147 lcdctl_brightness_up(device_t dv) 148 { 149 struct lcdctl_softc *sc = device_private(dv); 150 151 lcdctl_set_brightness(sc, sc->sc_brightness + 1); 152 } 153 154 static void 155 lcdctl_brightness_down(device_t dv) 156 { 157 struct lcdctl_softc *sc = device_private(dv); 158 159 lcdctl_set_brightness(sc, sc->sc_brightness - 1); 160 } 161 162 static void 163 lcdctl_display_on(device_t dv) 164 { 165 struct lcdctl_softc *sc = device_private(dv); 166 167 lcdctl_set_blank(sc, false); 168 lcdctl_set_backlight(sc, true); 169 } 170 171 static void 172 lcdctl_display_off(device_t dv) 173 { 174 struct lcdctl_softc *sc = device_private(dv); 175 176 lcdctl_set_backlight(sc, false); 177 lcdctl_set_blank(sc, true); 178 } 179 180 static __inline void 181 set_backlight(const struct lcdctl_backlight *bl) 182 { 183 184 (void) zssp_ic_send(ZSSP_IC_LZ9JG18, bl->duty); 185 if (ZAURUS_ISC1000) 186 ioexp_set_backlight(bl->on, bl->cont); 187 else 188 scoop_set_backlight(bl->on, bl->cont); 189 } 190 191 static void 192 lcdctl_set_brightness_internal(struct lcdctl_softc *sc, int newval) 193 { 194 int i; 195 196 /* 197 * It appears that the C3000 backlight can draw too much power if we 198 * switch it from a low to a high brightness. Increasing brightness 199 * in steps avoids this issue. 200 */ 201 if (newval > sc->sc_brightnesscurval) { 202 for (i = sc->sc_brightnesscurval + 1; i <= newval; i++) { 203 set_backlight(&sc->sc_backlighttbl[i]); 204 delay(5000); 205 } 206 } else 207 set_backlight(&sc->sc_backlighttbl[newval]); 208 209 sc->sc_brightnesscurval = newval; 210 } 211 212 static void 213 lcdctl_set_brightness(struct lcdctl_softc *sc, int newval) 214 { 215 int maxval = sc->sc_nbacklighttbl - 1; 216 217 if (newval < 0) 218 newval = 0; 219 else if (newval > maxval) 220 newval = maxval; 221 222 if (sc->sc_islit && !sc->sc_isblank) 223 lcdctl_set_brightness_internal(sc, newval); 224 225 if (newval > 0) 226 sc->sc_brightness = newval; 227 } 228 229 static void 230 lcdctl_set_backlight(struct lcdctl_softc *sc, bool onoff) 231 { 232 233 if (!onoff) { 234 lcdctl_set_brightness(sc, 0); 235 sc->sc_islit = false; 236 } else { 237 sc->sc_islit = true; 238 lcdctl_set_brightness(sc, sc->sc_brightness); 239 } 240 } 241 242 static void 243 lcdctl_set_blank(struct lcdctl_softc *sc, bool isblank) 244 { 245 246 if (isblank) { 247 lcdctl_set_brightness(sc, 0); 248 sc->sc_isblank = true; 249 } else { 250 sc->sc_isblank = false; 251 lcdctl_set_brightness(sc, sc->sc_brightness); 252 } 253 } 254 255 static void 256 lcdctl_set_onoff(struct lcdctl_softc *sc, bool onoff) 257 { 258 259 if (!onoff) { 260 lcdctl_set_brightness(sc, 0); 261 } else { 262 lcdctl_set_brightness(sc, sc->sc_brightness); 263 } 264 } 265 266 static int 267 lcdctl_param_ioctl(struct lcdctl_softc *sc, u_long cmd, struct wsdisplay_param *dp) 268 { 269 int rv = EINVAL; 270 271 switch (dp->param) { 272 case WSDISPLAYIO_PARAM_BACKLIGHT: 273 if (cmd == WSDISPLAYIO_GETPARAM) { 274 dp->min = 0; 275 dp->max = 1; 276 dp->curval = sc->sc_islit ? 1 : 0; 277 rv = 0; 278 } else if (cmd == WSDISPLAYIO_SETPARAM) { 279 lcdctl_set_backlight(sc, dp->curval != 0); 280 rv = 0; 281 } 282 break; 283 284 case WSDISPLAYIO_PARAM_CONTRAST: 285 /* unsupported */ 286 rv = ENOTTY; 287 break; 288 289 case WSDISPLAYIO_PARAM_BRIGHTNESS: 290 if (cmd == WSDISPLAYIO_GETPARAM) { 291 dp->min = 1; 292 dp->max = sc->sc_nbacklighttbl - 1; 293 dp->curval = sc->sc_brightness; 294 rv = 0; 295 } else if (cmd == WSDISPLAYIO_SETPARAM) { 296 lcdctl_set_brightness(sc, dp->curval); 297 rv = 0; 298 } 299 break; 300 } 301 return rv; 302 } 303 304 void 305 lcdctl_brightness(int newval) 306 { 307 308 if (__predict_true(lcdctl_sc != NULL)) 309 lcdctl_set_brightness(lcdctl_sc, newval); 310 } 311 312 void 313 lcdctl_blank(bool isblank) 314 { 315 316 if (__predict_true(lcdctl_sc != NULL)) 317 lcdctl_set_blank(lcdctl_sc, isblank); 318 } 319 320 void 321 lcdctl_onoff(bool onoff) 322 { 323 324 if (__predict_true(lcdctl_sc != NULL)) 325 lcdctl_set_onoff(lcdctl_sc, onoff); 326 } 327 328 int 329 lcdctl_param(u_long cmd, struct wsdisplay_param *dp) 330 { 331 332 if (__predict_true(lcdctl_sc != NULL)) 333 return lcdctl_param_ioctl(lcdctl_sc, cmd, dp); 334 return ENOTTY; /* unsupported */ 335 } 336
Indexes created Sun Sep 21 16:09:51 GMT 2025