zlcd.c revision 1.1
1 /* $NetBSD: zlcd.c,v 1.1 2006/12/16 05:23:06 ober Exp $ */ 2 /* $OpenBSD: zaurus_lcd.c,v 1.20 2006/06/02 20:50:14 miod Exp $ */ 3 /* NetBSD: lubbock_lcd.c,v 1.1 2003/08/09 19:38:53 bsh Exp */ 4 5 /* 6 * Copyright (c) 2002, 2003 Genetec Corporation. All rights reserved. 7 * Written by Hiroyuki Bessho for Genetec Corporation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of Genetec Corporation may not be used to endorse or 18 * promote products derived from this software without specific prior 19 * written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * LCD driver for Sharp Zaurus (based on the Intel Lubbock driver). 36 * 37 * Controlling LCD is almost completely done through PXA2X0's 38 * integrated LCD controller. Codes for it is arm/xscale/pxa2x0_lcd.c. 39 * 40 * Codes in this file provide platform specific things including: 41 * LCD on/off switch and backlight brightness 42 * LCD panel geometry 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: zlcd.c,v 1.1 2006/12/16 05:23:06 ober Exp $"); 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/conf.h> 51 #include <sys/uio.h> 52 #include <sys/malloc.h> 53 54 #include <dev/cons.h> 55 #include <dev/wscons/wsconsio.h> 56 #include <dev/wscons/wsdisplayvar.h> 57 #include <dev/wscons/wscons_callbacks.h> 58 59 #include <machine/bus.h> 60 #include <arm/xscale/pxa2x0var.h> 61 #include <arm/xscale/pxa2x0reg.h> 62 #include <arm/xscale/pxa2x0_lcd.h> 63 64 #include <zaurus/dev/scoopvar.h> 65 #include <zaurus/dev/zsspvar.h> 66 #include <zaurus/zaurus/zaurus_var.h> 67 68 /* 69 * wsdisplay glue 70 */ 71 struct pxa2x0_wsscreen_descr lcd_bpp16_screen = { 72 { 73 "std" 74 }, 75 16, /* bits per pixel */ 76 0/*RI_ROTATE_CW*/ /* quarter clockwise rotation */ 77 }; 78 79 static const struct wsscreen_descr *lcd_scr_descr[] = { 80 &lcd_bpp16_screen.c 81 }; 82 83 const struct wsscreen_list lcd_screen_list = { 84 sizeof lcd_scr_descr / sizeof lcd_scr_descr[0], lcd_scr_descr 85 }; 86 87 int lcd_ioctl(void *, void *, u_long, caddr_t, int, struct lwp *); 88 int lcd_param(struct pxa2x0_lcd_softc *, u_long, 89 struct wsdisplay_param *); 90 int lcd_show_screen(void *, void *, int, 91 void (*)(void *, int, int), void *); 92 void lcd_burner(void *, u_int, u_int); 93 94 const struct wsdisplay_accessops lcd_accessops = { 95 lcd_ioctl, 96 pxa2x0_lcd_mmap, 97 pxa2x0_lcd_alloc_screen, 98 pxa2x0_lcd_free_screen, 99 lcd_show_screen, 100 NULL, /* load_font */ 101 NULL, /* pollc */ 102 NULL, /* scroll */ 103 }; 104 105 #define CURRENT_DISPLAY &sharp_zaurus_C3000 106 107 const struct lcd_panel_geometry sharp_zaurus_C3000 = 108 { 109 480, /* Width */ 110 640, /* Height */ 111 0, /* No extra lines */ 112 113 LCDPANEL_ACTIVE | LCDPANEL_VSP | LCDPANEL_HSP, 114 1, /* clock divider */ 115 0, /* AC bias pin freq */ 116 117 0x28, /* horizontal sync pulse width */ 118 0x2e, /* BLW */ 119 0x7d, /* ELW */ 120 121 2, /* vertical sync pulse width */ 122 1, /* BFW */ 123 0, /* EFW */ 124 }; 125 126 struct sharp_lcd_backlight { 127 int duty; /* LZ9JG18 DAC value */ 128 int cont; /* BACKLIGHT_CONT signal */ 129 int on; /* BACKLIGHT_ON signal */ 130 }; 131 132 #define CURRENT_BACKLIGHT sharp_zaurus_C3000_bl 133 134 const struct sharp_lcd_backlight sharp_zaurus_C3000_bl[] = { 135 { 0x00, 0, 0 }, /* 0: Off */ 136 { 0x00, 0, 1 }, /* 1: 0% */ 137 { 0x01, 0, 1 }, /* 2: 20% */ 138 { 0x07, 0, 1 }, /* 3: 40% */ 139 { 0x01, 1, 1 }, /* 4: 60% */ 140 { 0x07, 1, 1 }, /* 5: 80% */ 141 { 0x11, 1, 1 }, /* 6: 100% */ 142 { -1, -1, -1 } /* 7: Invalid */ 143 }; 144 145 static int lcd_match(struct device *, struct cfdata *, void *); 146 static void lcd_attach(struct device *, struct device *, void *); 147 int lcd_cnattach(void); 148 149 CFATTACH_DECL(zlcd, sizeof(struct pxa2x0_lcd_softc), 150 lcd_match, lcd_attach, NULL, NULL); 151 152 int lcd_max_brightness(void); 153 int lcd_get_brightness(void); 154 void lcd_set_brightness(int); 155 void lcd_set_brightness_internal(int); 156 int lcd_get_backlight(void); 157 void lcd_set_backlight(int); 158 void lcd_blank(int); 159 void lcd_power(int, void *); 160 161 static int 162 lcd_match(struct device *parent, struct cfdata *cf, void *aux) 163 { 164 165 return 1; 166 } 167 168 static void 169 lcd_attach(struct device *parent, struct device *self, void *aux) 170 { 171 struct pxa2x0_lcd_softc *sc = (struct pxa2x0_lcd_softc *)self; 172 struct wsemuldisplaydev_attach_args aa; 173 174 printf("\n"); 175 176 pxa2x0_lcd_attach_sub(sc, aux, &lcd_bpp16_screen, CURRENT_DISPLAY, 177 glass_console); 178 179 aa.console = glass_console; 180 aa.scrdata = &lcd_screen_list; 181 aa.accessops = &lcd_accessops; 182 aa.accesscookie = sc; 183 184 (void)config_found(self, &aa, wsemuldisplaydevprint); 185 186 /* Start with approximately 40% of full brightness. */ 187 lcd_set_brightness(3); 188 189 (void)powerhook_establish(sc->dev.dv_xname, lcd_power, sc); 190 } 191 192 int 193 lcd_cnattach(void) 194 { 195 196 return pxa2x0_lcd_cnattach(&lcd_bpp16_screen, CURRENT_DISPLAY); 197 } 198 199 /* 200 * wsdisplay accessops overrides 201 */ 202 int 203 lcd_ioctl(void *v, void *vs, u_long cmd, caddr_t data, int flag, struct lwp *l) 204 { 205 struct pxa2x0_lcd_softc *sc = (struct pxa2x0_lcd_softc *)v; 206 int res = EINVAL; 207 208 switch (cmd) { 209 case WSDISPLAYIO_GETPARAM: 210 case WSDISPLAYIO_SETPARAM: 211 res = lcd_param(sc, cmd, (struct wsdisplay_param *)data); 212 break; 213 } 214 215 if (res == EINVAL) 216 res = pxa2x0_lcd_ioctl(v, vs, cmd, data, flag, l); 217 return res; 218 } 219 220 void 221 lcd_burner(void *v, u_int on, u_int flags) 222 { 223 224 lcd_set_brightness(on ? lcd_get_brightness() : 0); 225 } 226 227 int 228 lcd_show_screen(void *v, void *cookie, int waitok, 229 void (*cb)(void *, int, int), void *cbarg) 230 { 231 int error; 232 233 error = pxa2x0_lcd_show_screen(v, cookie, waitok, cb, cbarg); 234 if (error) 235 return (error); 236 237 /* Turn on LCD */ 238 lcd_burner(v, 1, 0); 239 240 return 0; 241 } 242 243 /* 244 * wsdisplay I/O controls 245 */ 246 int 247 lcd_param(struct pxa2x0_lcd_softc *sc, u_long cmd, 248 struct wsdisplay_param *dp) 249 { 250 int res = EINVAL; 251 252 switch (dp->param) { 253 case WSDISPLAYIO_PARAM_BACKLIGHT: 254 if (cmd == WSDISPLAYIO_GETPARAM) { 255 dp->min = 0; 256 dp->max = 1; 257 dp->curval = lcd_get_backlight(); 258 res = 0; 259 } else if (cmd == WSDISPLAYIO_SETPARAM) { 260 lcd_set_backlight(dp->curval); 261 res = 0; 262 } 263 break; 264 265 case WSDISPLAYIO_PARAM_CONTRAST: 266 /* unsupported */ 267 res = ENOTTY; 268 break; 269 270 case WSDISPLAYIO_PARAM_BRIGHTNESS: 271 if (cmd == WSDISPLAYIO_GETPARAM) { 272 dp->min = 1; 273 dp->max = lcd_max_brightness(); 274 dp->curval = lcd_get_brightness(); 275 res = 0; 276 } else if (cmd == WSDISPLAYIO_SETPARAM) { 277 lcd_set_brightness(dp->curval); 278 res = 0; 279 } 280 break; 281 } 282 283 return res; 284 } 285 286 /* 287 * LCD backlight 288 */ 289 290 static int lcdbrightnesscurval = 1; 291 static int lcdislit = 1; 292 static int lcdisblank = 0; 293 294 int 295 lcd_max_brightness(void) 296 { 297 int i; 298 299 for (i = 0; CURRENT_BACKLIGHT[i].duty != -1; i++) 300 continue; 301 return i - 1; 302 } 303 304 int 305 lcd_get_brightness(void) 306 { 307 308 return lcdbrightnesscurval; 309 } 310 311 void 312 lcd_set_brightness(int newval) 313 { 314 int maxval; 315 316 maxval = lcd_max_brightness(); 317 if (newval < 0) 318 newval = 0; 319 else if (newval > maxval) 320 newval = maxval; 321 322 if (lcd_get_backlight() && !lcdisblank) 323 lcd_set_brightness_internal(newval); 324 325 if (newval > 0) 326 lcdbrightnesscurval = newval; 327 } 328 329 void 330 lcd_set_brightness_internal(int newval) 331 { 332 static int curval = 1; 333 int i; 334 335 /* 336 * It appears that the C3000 backlight can draw too much power if we 337 * switch it from a low to a high brightness. Increasing brightness 338 * in steps avoids this issue. 339 */ 340 if (newval > curval) { 341 for (i = curval + 1; i <= newval; i++) { 342 (void)zssp_ic_send(ZSSP_IC_LZ9JG18, 343 CURRENT_BACKLIGHT[i].duty); 344 scoop_set_backlight(CURRENT_BACKLIGHT[i].on, 345 CURRENT_BACKLIGHT[i].cont); 346 delay(5000); 347 } 348 } else { 349 (void)zssp_ic_send(ZSSP_IC_LZ9JG18, 350 CURRENT_BACKLIGHT[newval].duty); 351 scoop_set_backlight(CURRENT_BACKLIGHT[newval].on, 352 CURRENT_BACKLIGHT[newval].cont); 353 } 354 355 curval = newval; 356 } 357 358 int 359 lcd_get_backlight(void) 360 { 361 362 return lcdislit; 363 } 364 365 void 366 lcd_set_backlight(int on) 367 { 368 369 if (!on) { 370 lcd_set_brightness(0); 371 lcdislit = 0; 372 } else { 373 lcdislit = 1; 374 lcd_set_brightness(lcd_get_brightness()); 375 } 376 } 377 378 void 379 lcd_blank(int blank) 380 { 381 382 if (blank) { 383 lcd_set_brightness(0); 384 lcdisblank = 1; 385 } else { 386 lcdisblank = 0; 387 lcd_set_brightness(lcd_get_brightness()); 388 } 389 } 390 391 void 392 lcd_power(int why, void *v) 393 { 394 395 switch (why) { 396 case PWR_SUSPEND: 397 case PWR_STANDBY: 398 lcd_set_brightness(0); 399 pxa2x0_lcd_power(why, v); 400 break; 401 402 case PWR_RESUME: 403 pxa2x0_lcd_power(why, v); 404 lcd_set_brightness(lcd_get_brightness()); 405 break; 406 } 407 } 408
Indexes created Mon Sep 29 21:09:56 GMT 2025