netwalker_backlight.c revision 1.1.2.2
1 1.1.2.2 rmind /* $NetBSD: netwalker_backlight.c,v 1.1.2.2 2014/05/18 17:45:05 rmind Exp $ */ 2 1.1.2.2 rmind 3 1.1.2.2 rmind /* 4 1.1.2.2 rmind * Copyright (c) 2014 Genetec Corporation. All rights reserved. 5 1.1.2.2 rmind * Written by Hashimoto Kenichi for Genetec Corporation. 6 1.1.2.2 rmind * 7 1.1.2.2 rmind * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 rmind * modification, are permitted provided that the following conditions 9 1.1.2.2 rmind * are met: 10 1.1.2.2 rmind * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 rmind * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 rmind * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 rmind * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 rmind * documentation and/or other materials provided with the distribution. 15 1.1.2.2 rmind * 16 1.1.2.2 rmind * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND 17 1.1.2.2 rmind * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.1.2.2 rmind * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.1.2.2 rmind * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION 20 1.1.2.2 rmind * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 1.1.2.2 rmind * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 1.1.2.2 rmind * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 1.1.2.2 rmind * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 1.1.2.2 rmind * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 1.1.2.2 rmind * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 1.1.2.2 rmind * POSSIBILITY OF SUCH DAMAGE. 27 1.1.2.2 rmind */ 28 1.1.2.2 rmind 29 1.1.2.2 rmind #include <sys/cdefs.h> 30 1.1.2.2 rmind __KERNEL_RCSID(0, "$NetBSD: netwalker_backlight.c,v 1.1.2.2 2014/05/18 17:45:05 rmind Exp $"); 31 1.1.2.2 rmind 32 1.1.2.2 rmind #include <sys/param.h> 33 1.1.2.2 rmind #include <sys/bus.h> 34 1.1.2.2 rmind #include <sys/systm.h> 35 1.1.2.2 rmind #include <sys/device.h> 36 1.1.2.2 rmind #include <sys/pmf.h> 37 1.1.2.2 rmind 38 1.1.2.2 rmind #include <dev/wscons/wsconsio.h> 39 1.1.2.2 rmind #include <dev/wscons/wsdisplayvar.h> 40 1.1.2.2 rmind 41 1.1.2.2 rmind #include <dev/sysmon/sysmonvar.h> 42 1.1.2.2 rmind #include <dev/sysmon/sysmon_taskq.h> 43 1.1.2.2 rmind 44 1.1.2.2 rmind #include <arm/imx/imx51reg.h> 45 1.1.2.2 rmind #include <arm/imx/imx51var.h> 46 1.1.2.2 rmind #include <arm/imx/imx51_ccmvar.h> 47 1.1.2.2 rmind #include <arm/imx/imxpwmvar.h> 48 1.1.2.2 rmind 49 1.1.2.2 rmind #include <evbarm/netwalker/netwalker_backlightvar.h> 50 1.1.2.2 rmind 51 1.1.2.2 rmind #define BRIGHTNESS_MAX 16 52 1.1.2.2 rmind 53 1.1.2.2 rmind struct netwalker_backlight_softc { 54 1.1.2.2 rmind struct imxpwm_softc sc_imxpwm; 55 1.1.2.2 rmind 56 1.1.2.2 rmind int sc_brightness; 57 1.1.2.2 rmind bool sc_islit; 58 1.1.2.2 rmind }; 59 1.1.2.2 rmind 60 1.1.2.2 rmind static struct netwalker_backlight_softc *netwalker_backlight_sc; 61 1.1.2.2 rmind 62 1.1.2.2 rmind static int netwalker_backlight_match(device_t, cfdata_t, void *); 63 1.1.2.2 rmind static void netwalker_backlight_attach(device_t, device_t, void *); 64 1.1.2.2 rmind static int netwalker_backlight_detach(device_t, int); 65 1.1.2.2 rmind 66 1.1.2.2 rmind CFATTACH_DECL_NEW(netwalker_backlight, sizeof(struct netwalker_backlight_softc), 67 1.1.2.2 rmind netwalker_backlight_match, netwalker_backlight_attach, netwalker_backlight_detach, NULL); 68 1.1.2.2 rmind 69 1.1.2.2 rmind static bool netwalker_backlight_resume(device_t, const pmf_qual_t *); 70 1.1.2.2 rmind static bool netwalker_backlight_suspend(device_t, const pmf_qual_t *); 71 1.1.2.2 rmind static void netwalker_backlight_on(device_t); 72 1.1.2.2 rmind static void netwalker_backlight_off(device_t); 73 1.1.2.2 rmind static void netwalker_brightness_up(device_t); 74 1.1.2.2 rmind static void netwalker_brightness_down(device_t); 75 1.1.2.2 rmind static void netwalker_set_brightness(struct netwalker_backlight_softc *, int); 76 1.1.2.2 rmind 77 1.1.2.2 rmind static int 78 1.1.2.2 rmind netwalker_backlight_match(device_t parent, cfdata_t cf, void * aux) 79 1.1.2.2 rmind { 80 1.1.2.2 rmind return imxpwm_match(parent, cf, aux); 81 1.1.2.2 rmind } 82 1.1.2.2 rmind 83 1.1.2.2 rmind static void 84 1.1.2.2 rmind netwalker_backlight_attach(device_t parent, device_t self, void *aux) 85 1.1.2.2 rmind { 86 1.1.2.2 rmind struct netwalker_backlight_softc *sc = device_private(self); 87 1.1.2.2 rmind struct imxpwm_softc *imxpwm = &sc->sc_imxpwm; 88 1.1.2.2 rmind 89 1.1.2.2 rmind imxpwm->sc_dev = self; 90 1.1.2.2 rmind imxpwm->sc_hz = 1000; /* 1000 Hz */ 91 1.1.2.2 rmind imxpwm->sc_handler = NULL; 92 1.1.2.2 rmind imxpwm->sc_cookie = sc; 93 1.1.2.2 rmind imxpwm_attach(imxpwm, aux); 94 1.1.2.2 rmind 95 1.1.2.2 rmind aprint_normal(": LCD BackLight Control\n"); 96 1.1.2.2 rmind aprint_naive(": LCD BackLight Control\n"); 97 1.1.2.2 rmind 98 1.1.2.2 rmind netwalker_backlight_sc = sc; 99 1.1.2.2 rmind 100 1.1.2.2 rmind /* BackLight 100% On */ 101 1.1.2.2 rmind sc->sc_brightness = BRIGHTNESS_MAX; 102 1.1.2.2 rmind sc->sc_islit = true; 103 1.1.2.2 rmind imxpwm_set_pwm(imxpwm, 1000); 104 1.1.2.2 rmind 105 1.1.2.2 rmind if (!pmf_device_register(self, netwalker_backlight_suspend, 106 1.1.2.2 rmind netwalker_backlight_resume)) 107 1.1.2.2 rmind aprint_error_dev(self, 108 1.1.2.2 rmind "couldn't establish backlight handler\n"); 109 1.1.2.2 rmind 110 1.1.2.2 rmind if (!pmf_event_register(self, PMFE_DISPLAY_BRIGHTNESS_UP, 111 1.1.2.2 rmind netwalker_brightness_up, true)) 112 1.1.2.2 rmind aprint_error_dev(self, 113 1.1.2.2 rmind "couldn't register BRIGHTNESS UP event handler\n"); 114 1.1.2.2 rmind if (!pmf_event_register(self, PMFE_DISPLAY_BRIGHTNESS_DOWN, 115 1.1.2.2 rmind netwalker_brightness_down, true)) 116 1.1.2.2 rmind aprint_error_dev(self, 117 1.1.2.2 rmind "couldn't register BRIGHTNESS DOWN event handler\n"); 118 1.1.2.2 rmind if (!pmf_event_register(self, PMFE_DISPLAY_ON, 119 1.1.2.2 rmind netwalker_backlight_on, true)) 120 1.1.2.2 rmind aprint_error_dev(self, 121 1.1.2.2 rmind "couldn't register DISPLAY ON event handler\n"); 122 1.1.2.2 rmind if (!pmf_event_register(self, PMFE_DISPLAY_OFF, 123 1.1.2.2 rmind netwalker_backlight_off, true)) 124 1.1.2.2 rmind aprint_error_dev(self, 125 1.1.2.2 rmind "couldn't register DISPLAY OFF event handler\n"); 126 1.1.2.2 rmind if (!pmf_event_register(self, PMFE_CHASSIS_LID_OPEN, 127 1.1.2.2 rmind netwalker_backlight_on, true)) 128 1.1.2.2 rmind aprint_error_dev(self, 129 1.1.2.2 rmind "couldn't register LID OPEN event handler\n"); 130 1.1.2.2 rmind if (!pmf_event_register(self, PMFE_CHASSIS_LID_CLOSE, 131 1.1.2.2 rmind netwalker_backlight_off, true)) 132 1.1.2.2 rmind aprint_error_dev(self, 133 1.1.2.2 rmind "couldn't register LID CLOSE event handler\n"); 134 1.1.2.2 rmind } 135 1.1.2.2 rmind 136 1.1.2.2 rmind static int 137 1.1.2.2 rmind netwalker_backlight_detach(device_t self, int flags) 138 1.1.2.2 rmind { 139 1.1.2.2 rmind struct netwalker_backlight_softc *sc = device_private(self); 140 1.1.2.2 rmind struct imxpwm_softc *imxpwm = &sc->sc_imxpwm; 141 1.1.2.2 rmind 142 1.1.2.2 rmind imxpwm_set_pwm(imxpwm, 0); 143 1.1.2.2 rmind pmf_device_deregister(self); 144 1.1.2.2 rmind return 0; 145 1.1.2.2 rmind } 146 1.1.2.2 rmind 147 1.1.2.2 rmind /* 148 1.1.2.2 rmind * Power management 149 1.1.2.2 rmind */ 150 1.1.2.2 rmind static bool 151 1.1.2.2 rmind netwalker_backlight_suspend(device_t dv, const pmf_qual_t *qual) 152 1.1.2.2 rmind { 153 1.1.2.2 rmind netwalker_backlight_off(dv); 154 1.1.2.2 rmind return true; 155 1.1.2.2 rmind } 156 1.1.2.2 rmind 157 1.1.2.2 rmind static bool 158 1.1.2.2 rmind netwalker_backlight_resume(device_t dv, const pmf_qual_t *qual) 159 1.1.2.2 rmind { 160 1.1.2.2 rmind netwalker_backlight_on(dv); 161 1.1.2.2 rmind return true; 162 1.1.2.2 rmind } 163 1.1.2.2 rmind 164 1.1.2.2 rmind static void 165 1.1.2.2 rmind netwalker_backlight_on(device_t dv) 166 1.1.2.2 rmind { 167 1.1.2.2 rmind struct netwalker_backlight_softc *sc = device_private(dv); 168 1.1.2.2 rmind sc->sc_islit = true; 169 1.1.2.2 rmind netwalker_set_brightness(sc, sc->sc_brightness); 170 1.1.2.2 rmind } 171 1.1.2.2 rmind 172 1.1.2.2 rmind static void 173 1.1.2.2 rmind netwalker_backlight_off(device_t dv) 174 1.1.2.2 rmind { 175 1.1.2.2 rmind struct netwalker_backlight_softc *sc = device_private(dv); 176 1.1.2.2 rmind sc->sc_islit = false; 177 1.1.2.2 rmind netwalker_set_brightness(sc, sc->sc_brightness); 178 1.1.2.2 rmind } 179 1.1.2.2 rmind 180 1.1.2.2 rmind static void 181 1.1.2.2 rmind netwalker_brightness_up(device_t dv) 182 1.1.2.2 rmind { 183 1.1.2.2 rmind struct netwalker_backlight_softc *sc = device_private(dv); 184 1.1.2.2 rmind netwalker_set_brightness(sc, sc->sc_brightness + 1); 185 1.1.2.2 rmind } 186 1.1.2.2 rmind 187 1.1.2.2 rmind static void 188 1.1.2.2 rmind netwalker_brightness_down(device_t dv) 189 1.1.2.2 rmind { 190 1.1.2.2 rmind struct netwalker_backlight_softc *sc = device_private(dv); 191 1.1.2.2 rmind netwalker_set_brightness(sc, sc->sc_brightness - 1); 192 1.1.2.2 rmind } 193 1.1.2.2 rmind 194 1.1.2.2 rmind static void 195 1.1.2.2 rmind netwalker_set_brightness(struct netwalker_backlight_softc *sc, int newval) 196 1.1.2.2 rmind { 197 1.1.2.2 rmind struct imxpwm_softc *imxpwm = &sc->sc_imxpwm; 198 1.1.2.2 rmind 199 1.1.2.2 rmind if (newval < 0) 200 1.1.2.2 rmind newval = 0; 201 1.1.2.2 rmind else if (newval > BRIGHTNESS_MAX) 202 1.1.2.2 rmind newval = BRIGHTNESS_MAX; 203 1.1.2.2 rmind sc->sc_brightness = newval; 204 1.1.2.2 rmind 205 1.1.2.2 rmind if (sc->sc_islit) 206 1.1.2.2 rmind imxpwm_set_pwm(imxpwm, 1000 * sc->sc_brightness / BRIGHTNESS_MAX); 207 1.1.2.2 rmind else 208 1.1.2.2 rmind imxpwm_set_pwm(imxpwm, 0); 209 1.1.2.2 rmind } 210 1.1.2.2 rmind 211 1.1.2.2 rmind int 212 1.1.2.2 rmind netwalker_lcd_param_ioctl(u_long cmd, struct wsdisplay_param *dp) 213 1.1.2.2 rmind { 214 1.1.2.2 rmind struct netwalker_backlight_softc *sc = netwalker_backlight_sc; 215 1.1.2.2 rmind int rv = EINVAL; 216 1.1.2.2 rmind 217 1.1.2.2 rmind switch (dp->param) { 218 1.1.2.2 rmind case WSDISPLAYIO_PARAM_BACKLIGHT: 219 1.1.2.2 rmind if (cmd == WSDISPLAYIO_GETPARAM) { 220 1.1.2.2 rmind dp->min = 0; 221 1.1.2.2 rmind dp->max = 1; 222 1.1.2.2 rmind dp->curval = sc->sc_islit ? 1 : 0; 223 1.1.2.2 rmind rv = 0; 224 1.1.2.2 rmind } else if (cmd == WSDISPLAYIO_SETPARAM) { 225 1.1.2.2 rmind if (dp->curval != 0) 226 1.1.2.2 rmind netwalker_backlight_on(sc->sc_imxpwm.sc_dev); 227 1.1.2.2 rmind else 228 1.1.2.2 rmind netwalker_backlight_off(sc->sc_imxpwm.sc_dev); 229 1.1.2.2 rmind rv = 0; 230 1.1.2.2 rmind } 231 1.1.2.2 rmind break; 232 1.1.2.2 rmind 233 1.1.2.2 rmind case WSDISPLAYIO_PARAM_CONTRAST: 234 1.1.2.2 rmind /* unsupported */ 235 1.1.2.2 rmind rv = ENOTSUP; 236 1.1.2.2 rmind break; 237 1.1.2.2 rmind 238 1.1.2.2 rmind case WSDISPLAYIO_PARAM_BRIGHTNESS: 239 1.1.2.2 rmind if (cmd == WSDISPLAYIO_GETPARAM) { 240 1.1.2.2 rmind dp->min = 0; 241 1.1.2.2 rmind dp->max = BRIGHTNESS_MAX; 242 1.1.2.2 rmind dp->curval = sc->sc_brightness; 243 1.1.2.2 rmind rv = 0; 244 1.1.2.2 rmind } else if (cmd == WSDISPLAYIO_SETPARAM) { 245 1.1.2.2 rmind netwalker_set_brightness(sc, dp->curval); 246 1.1.2.2 rmind rv = 0; 247 1.1.2.2 rmind } 248 1.1.2.2 rmind break; 249 1.1.2.2 rmind } 250 1.1.2.2 rmind 251 1.1.2.2 rmind return rv; 252 1.1.2.2 rmind } 253
Indexes created Thu Oct 02 01:09:59 GMT 2025