/* $NetBSD: lcdctl.c,v 1.3 2012/01/29 10:12:41 tsutsui Exp $ */ /*- * Copyright (C) 2012 NONAKA Kimihiro * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: lcdctl.c,v 1.3 2012/01/29 10:12:41 tsutsui Exp $"); #include "ioexp.h" #include #include #include #include #include #include #include #include #include #include #include struct lcdctl_backlight { int duty; /* LZ9JG18 DAC value */ int cont; /* BACKLIGHT_CONT signal */ int on; /* BACKLIGHT_ON signal */ }; struct lcdctl_softc { device_t sc_dev; int sc_brightness; int sc_brightnesscurval; bool sc_islit; bool sc_isblank; int sc_nbacklighttbl; const struct lcdctl_backlight *sc_backlighttbl; }; /* for SL-C1000/SL-C3x00 */ static const struct lcdctl_backlight lcdctl_backlight_c3000[] = { { 0x00, 0, 0 }, /* 0: Off */ { 0x00, 0, 1 }, /* 1: 0% */ { 0x01, 0, 1 }, /* 2: 20% */ { 0x07, 0, 1 }, /* 3: 40% */ { 0x01, 1, 1 }, /* 4: 60% */ { 0x07, 1, 1 }, /* 5: 80% */ { 0x11, 1, 1 } /* 6: 100% */ }; static int lcdctl_match(device_t, cfdata_t, void *); static void lcdctl_attach(device_t, device_t, void *); CFATTACH_DECL_NEW(lcdctl, sizeof(struct lcdctl_softc), lcdctl_match, lcdctl_attach, NULL, NULL); static void lcdctl_brightness_up(device_t); static void lcdctl_brightness_down(device_t); static void lcdctl_display_on(device_t); static void lcdctl_display_off(device_t); static void lcdctl_set_brightness(struct lcdctl_softc *, int); static void lcdctl_set_blank(struct lcdctl_softc *, bool); static void lcdctl_set_backlight(struct lcdctl_softc *, bool); static struct lcdctl_softc *lcdctl_sc; static int lcdctl_match(device_t parent, cfdata_t cf, void *aux) { struct zssp_attach_args *aa = aux; if (strcmp("lcdctl", aa->zaa_name)) return 0; return 1; } static void lcdctl_attach(device_t parent, device_t self, void *aux) { struct lcdctl_softc *sc = device_private(self); sc->sc_dev = self; aprint_normal("\n"); aprint_naive("\n"); sc->sc_brightness = sc->sc_brightnesscurval = 1; sc->sc_islit = true; sc->sc_isblank = false; if (ZAURUS_ISC1000 || ZAURUS_ISC3000) { sc->sc_nbacklighttbl = __arraycount(lcdctl_backlight_c3000); sc->sc_backlighttbl = lcdctl_backlight_c3000; } else { /* XXX: Is this okay for C7x0/860? */ sc->sc_nbacklighttbl = __arraycount(lcdctl_backlight_c3000); sc->sc_backlighttbl = lcdctl_backlight_c3000; } /* Start with approximately 40% of full brightness. */ lcdctl_set_brightness(sc, 3); lcdctl_sc = sc; if (!pmf_event_register(self, PMFE_DISPLAY_BRIGHTNESS_UP, lcdctl_brightness_up, true)) aprint_error_dev(self, "couldn't register event handler\n"); if (!pmf_event_register(self, PMFE_DISPLAY_BRIGHTNESS_DOWN, lcdctl_brightness_down, true)) aprint_error_dev(self, "couldn't register event handler\n"); if (!pmf_event_register(self, PMFE_DISPLAY_ON, lcdctl_display_on, true)) aprint_error_dev(self, "couldn't register event handler\n"); if (!pmf_event_register(self, PMFE_DISPLAY_OFF, lcdctl_display_off, true)) aprint_error_dev(self, "couldn't register event handler\n"); } static void lcdctl_brightness_up(device_t dv) { struct lcdctl_softc *sc = device_private(dv); lcdctl_set_brightness(sc, sc->sc_brightness + 1); } static void lcdctl_brightness_down(device_t dv) { struct lcdctl_softc *sc = device_private(dv); lcdctl_set_brightness(sc, sc->sc_brightness - 1); } static void lcdctl_display_on(device_t dv) { struct lcdctl_softc *sc = device_private(dv); lcdctl_set_blank(sc, false); lcdctl_set_backlight(sc, true); } static void lcdctl_display_off(device_t dv) { struct lcdctl_softc *sc = device_private(dv); lcdctl_set_backlight(sc, false); lcdctl_set_blank(sc, true); } static __inline void set_backlight(const struct lcdctl_backlight *bl) { (void) zssp_ic_send(ZSSP_IC_LZ9JG18, bl->duty); if (ZAURUS_ISC1000) ioexp_set_backlight(bl->on, bl->cont); else scoop_set_backlight(bl->on, bl->cont); } static void lcdctl_set_brightness_internal(struct lcdctl_softc *sc, int newval) { int i; /* * It appears that the C3000 backlight can draw too much power if we * switch it from a low to a high brightness. Increasing brightness * in steps avoids this issue. */ if (newval > sc->sc_brightnesscurval) { for (i = sc->sc_brightnesscurval + 1; i <= newval; i++) { set_backlight(&sc->sc_backlighttbl[i]); delay(5000); } } else set_backlight(&sc->sc_backlighttbl[newval]); sc->sc_brightnesscurval = newval; } static void lcdctl_set_brightness(struct lcdctl_softc *sc, int newval) { int maxval = sc->sc_nbacklighttbl - 1; if (newval < 0) newval = 0; else if (newval > maxval) newval = maxval; if (sc->sc_islit && !sc->sc_isblank) lcdctl_set_brightness_internal(sc, newval); if (newval > 0) sc->sc_brightness = newval; } static void lcdctl_set_backlight(struct lcdctl_softc *sc, bool onoff) { if (!onoff) { lcdctl_set_brightness(sc, 0); sc->sc_islit = false; } else { sc->sc_islit = true; lcdctl_set_brightness(sc, sc->sc_brightness); } } static void lcdctl_set_blank(struct lcdctl_softc *sc, bool isblank) { if (isblank) { lcdctl_set_brightness(sc, 0); sc->sc_isblank = true; } else { sc->sc_isblank = false; lcdctl_set_brightness(sc, sc->sc_brightness); } } static void lcdctl_set_onoff(struct lcdctl_softc *sc, bool onoff) { if (!onoff) { lcdctl_set_brightness(sc, 0); } else { lcdctl_set_brightness(sc, sc->sc_brightness); } } static int lcdctl_param_ioctl(struct lcdctl_softc *sc, u_long cmd, struct wsdisplay_param *dp) { int rv = EINVAL; switch (dp->param) { case WSDISPLAYIO_PARAM_BACKLIGHT: if (cmd == WSDISPLAYIO_GETPARAM) { dp->min = 0; dp->max = 1; dp->curval = sc->sc_islit ? 1 : 0; rv = 0; } else if (cmd == WSDISPLAYIO_SETPARAM) { lcdctl_set_backlight(sc, dp->curval != 0); rv = 0; } break; case WSDISPLAYIO_PARAM_CONTRAST: /* unsupported */ rv = ENOTTY; break; case WSDISPLAYIO_PARAM_BRIGHTNESS: if (cmd == WSDISPLAYIO_GETPARAM) { dp->min = 1; dp->max = sc->sc_nbacklighttbl - 1; dp->curval = sc->sc_brightness; rv = 0; } else if (cmd == WSDISPLAYIO_SETPARAM) { lcdctl_set_brightness(sc, dp->curval); rv = 0; } break; } return rv; } void lcdctl_brightness(int newval) { if (__predict_true(lcdctl_sc != NULL)) lcdctl_set_brightness(lcdctl_sc, newval); } void lcdctl_blank(bool isblank) { if (__predict_true(lcdctl_sc != NULL)) lcdctl_set_blank(lcdctl_sc, isblank); } void lcdctl_onoff(bool onoff) { if (__predict_true(lcdctl_sc != NULL)) lcdctl_set_onoff(lcdctl_sc, onoff); } int lcdctl_param(u_long cmd, struct wsdisplay_param *dp) { if (__predict_true(lcdctl_sc != NULL)) return lcdctl_param_ioctl(lcdctl_sc, cmd, dp); return ENOTTY; /* unsupported */ }