j6x0lcd.c revision 1.3.2.5
1 1.3.2.5 skrll /* $NetBSD: j6x0lcd.c,v 1.3.2.5 2005/03/04 16:38:36 skrll Exp $ */ 2 1.3.2.2 skrll 3 1.3.2.2 skrll /* 4 1.3.2.2 skrll * Copyright (c) 2004 Valeriy E. Ushakov 5 1.3.2.2 skrll * All rights reserved. 6 1.3.2.2 skrll * 7 1.3.2.2 skrll * Redistribution and use in source and binary forms, with or without 8 1.3.2.2 skrll * modification, are permitted provided that the following conditions 9 1.3.2.2 skrll * are met: 10 1.3.2.2 skrll * 1. Redistributions of source code must retain the above copyright 11 1.3.2.2 skrll * notice, this list of conditions and the following disclaimer. 12 1.3.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 13 1.3.2.2 skrll * notice, this list of conditions and the following disclaimer in the 14 1.3.2.2 skrll * documentation and/or other materials provided with the distribution. 15 1.3.2.2 skrll * 3. The name of the author may not be used to endorse or promote products 16 1.3.2.2 skrll * derived from this software without specific prior written permission 17 1.3.2.2 skrll * 18 1.3.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 1.3.2.2 skrll * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 1.3.2.2 skrll * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 1.3.2.2 skrll * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 1.3.2.2 skrll * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 1.3.2.2 skrll * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 1.3.2.2 skrll * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 1.3.2.2 skrll * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 1.3.2.2 skrll * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 1.3.2.2 skrll * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 1.3.2.2 skrll */ 29 1.3.2.2 skrll 30 1.3.2.2 skrll #include <sys/cdefs.h> 31 1.3.2.5 skrll __KERNEL_RCSID(0, "$NetBSD: j6x0lcd.c,v 1.3.2.5 2005/03/04 16:38:36 skrll Exp $"); 32 1.3.2.2 skrll 33 1.3.2.2 skrll #include <sys/param.h> 34 1.3.2.2 skrll #include <sys/kernel.h> 35 1.3.2.2 skrll #include <sys/device.h> 36 1.3.2.2 skrll #include <sys/systm.h> 37 1.3.2.2 skrll #ifdef GPROF 38 1.3.2.2 skrll #include <sys/gmon.h> 39 1.3.2.2 skrll #endif 40 1.3.2.2 skrll 41 1.3.2.2 skrll #include <machine/platid.h> 42 1.3.2.2 skrll #include <machine/platid_mask.h> 43 1.3.2.2 skrll 44 1.3.2.2 skrll #include <machine/config_hook.h> 45 1.3.2.2 skrll 46 1.3.2.2 skrll #include <sh3/dacreg.h> 47 1.3.2.2 skrll #include <hpcsh/dev/hd64461/hd64461var.h> /* XXX: for hd64461_reg_read_2 &c */ 48 1.3.2.2 skrll #include <hpcsh/dev/hd64461/hd64461reg.h> 49 1.3.2.2 skrll #include <hpcsh/dev/hd64461/hd64461gpioreg.h> 50 1.3.2.2 skrll 51 1.3.2.2 skrll 52 1.3.2.2 skrll /* 53 1.3.2.2 skrll * LCD power: controlled by pin 0 in HD64461 GPIO port B. 54 1.3.2.2 skrll * 0 - power on 55 1.3.2.2 skrll * 1 - power off 56 1.3.2.2 skrll */ 57 1.3.2.2 skrll #define HD64461_GPBDR_J6X0LCD_OFF 0x01 58 1.3.2.2 skrll 59 1.3.2.2 skrll #define HD64461_GPBCR_J6X0LCD_OFF_MASK 0xfffc 60 1.3.2.2 skrll #define HD64461_GPBCR_J6X0LCD_OFF_BITS 0x0001 61 1.3.2.2 skrll 62 1.3.2.2 skrll 63 1.3.2.2 skrll /* 64 1.3.2.2 skrll * LCD brightness: controlled by DAC channel 0. Larger channel values 65 1.3.2.2 skrll * mean dimmer. Values smaller (i.e. brighter) then 0x5e seems to 66 1.3.2.2 skrll * result in no visible changes. 67 1.3.2.2 skrll */ 68 1.3.2.2 skrll #define J6X0LCD_BRIGHTNESS_DA_MAX 0x5e 69 1.3.2.2 skrll #define J6X0LCD_BRIGHTNESS_DA_MIN 0xff 70 1.3.2.2 skrll 71 1.3.2.2 skrll #define J6X0LCD_DA_TO_BRIGHTNESS(da) \ 72 1.3.2.2 skrll (J6X0LCD_BRIGHTNESS_DA_MIN - (da)) 73 1.3.2.2 skrll 74 1.3.2.2 skrll #define J6X0LCD_BRIGHTNESS_TO_DA(br) \ 75 1.3.2.2 skrll (J6X0LCD_BRIGHTNESS_DA_MIN - (br)) 76 1.3.2.2 skrll 77 1.3.2.2 skrll #define J6X0LCD_BRIGHTNESS_MAX \ 78 1.3.2.2 skrll J6X0LCD_DA_TO_BRIGHTNESS(J6X0LCD_BRIGHTNESS_DA_MAX) 79 1.3.2.2 skrll 80 1.3.2.2 skrll /* convenience macro to accesses DAC registers */ 81 1.3.2.2 skrll #define DAC_(x) (*((volatile uint8_t *)SH7709_DA ## x)) 82 1.3.2.2 skrll 83 1.3.2.2 skrll 84 1.3.2.2 skrll /* 85 1.3.2.2 skrll * LCD contrast: controlled by pins 6,5,4,3 HD64461 GPIO port B. 86 1.3.2.2 skrll * 6th is the least significant bit, 3rd is the most significant. 87 1.3.2.2 skrll * The bits are inverted: .1111... = 0, .0111... = 1, etc. 88 1.3.2.2 skrll * 89 1.3.2.2 skrll * We control the contrast value by setting bits in the data register 90 1.3.2.2 skrll * to all ones, and changing the mode of the bits in the control 91 1.3.2.2 skrll * register, keeping "ones" in gpio output mode (1), and switching 92 1.3.2.2 skrll * "zeros" to input mode (3). This is what WinCE also does. 93 1.3.2.2 skrll * 94 1.3.2.2 skrll * Alternative method is to set the mode of all bits to gpio output 95 1.3.2.2 skrll * mode and then change the bits in the data register. This method 96 1.3.2.2 skrll * results in significantly less contrast screen for the same values. 97 1.3.2.2 skrll * E.g., WinCE default contrast value is 11 (in our numbering, 23 in 98 1.3.2.2 skrll * WinCE's) - which is fine in the "tweak the control register" 99 1.3.2.2 skrll * method, but is very blurry in the "tweak the data register" method. 100 1.3.2.2 skrll * Subjectively, 15 in the "tweak control" method looks like 7 in the 101 1.3.2.2 skrll * "tweak data" method. 102 1.3.2.2 skrll * 103 1.3.2.2 skrll * May be it's possible to control a wider range of contrast by 104 1.3.2.2 skrll * combining the two methods, but values above 7 in the "tweak data" 105 1.3.2.2 skrll * method are so blurry that they are next to unusable in practice. 106 1.3.2.2 skrll */ 107 1.3.2.2 skrll #define J6X0LCD_CONTRAST_MAX 15 108 1.3.2.2 skrll 109 1.3.2.2 skrll #define HD64461_GPBDR_J6X0LCD_CONTRAST_MASK 0x87 110 1.3.2.2 skrll #define HD64461_GPBDR_J6X0LCD_CONTRAST_BITS 0x78 111 1.3.2.2 skrll 112 1.3.2.2 skrll #if 0 113 1.3.2.2 skrll /* "tweak data" */ 114 1.3.2.2 skrll static uint8_t j6x0lcd_contrast_data_bits[] = { 115 1.3.2.2 skrll 0x78, 0x38, 0x58, 0x18, 0x68, 0x28, 0x48, 0x08, 116 1.3.2.2 skrll 0x70, 0x30, 0x50, 0x10, 0x60, 0x20, 0x40, 0x00 117 1.3.2.2 skrll }; 118 1.3.2.2 skrll #endif 119 1.3.2.2 skrll 120 1.3.2.2 skrll #define HD64461_GPBCR_J6X0LCD_CONTRAST_MASK 0xc03f 121 1.3.2.2 skrll #define HD64461_GPBCR_J6X0LCD_CONTRAST_BITS 0x1540 122 1.3.2.2 skrll 123 1.3.2.2 skrll /* "tweak control" */ 124 1.3.2.2 skrll static uint16_t j6x0lcd_contrast_control_bits[] = { 125 1.3.2.2 skrll 0x1540, 0x3540, 0x1d40, 0x3d40, 0x1740, 0x3740, 0x1f40, 0x3f40, 126 1.3.2.2 skrll 0x15c0, 0x35c0, 0x1dc0, 0x3dc0, 0x17c0, 0x37c0, 0x1fc0, 0x3fc0 127 1.3.2.2 skrll }; 128 1.3.2.2 skrll 129 1.3.2.2 skrll 130 1.3.2.2 skrll struct j6x0lcd_softc { 131 1.3.2.2 skrll struct device sc_dev; 132 1.3.2.2 skrll int sc_brightness; 133 1.3.2.2 skrll int sc_contrast; 134 1.3.2.2 skrll }; 135 1.3.2.2 skrll 136 1.3.2.2 skrll static int j6x0lcd_match(struct device *, struct cfdata *, void *); 137 1.3.2.2 skrll static void j6x0lcd_attach(struct device *, struct device *, void *); 138 1.3.2.2 skrll 139 1.3.2.2 skrll CFATTACH_DECL(j6x0lcd, sizeof(struct j6x0lcd_softc), 140 1.3.2.2 skrll j6x0lcd_match, j6x0lcd_attach, NULL, NULL); 141 1.3.2.2 skrll 142 1.3.2.2 skrll 143 1.3.2.2 skrll static int j6x0lcd_param(void *, int, long, void *); 144 1.3.2.2 skrll static int j6x0lcd_power(void *, int, long, void *); 145 1.3.2.2 skrll 146 1.3.2.2 skrll 147 1.3.2.2 skrll static int 148 1.3.2.2 skrll j6x0lcd_match(struct device *parent, struct cfdata *cfp, void *aux) 149 1.3.2.2 skrll { 150 1.3.2.2 skrll 151 1.3.2.2 skrll /* 152 1.3.2.2 skrll * XXX: does platid_mask_MACH_HP_LX matches _JORNADA_6XX too? 153 1.3.2.2 skrll * Is 620 wired similarly? 154 1.3.2.2 skrll */ 155 1.3.2.2 skrll if (!platid_match(&platid, &platid_mask_MACH_HP_JORNADA_6XX)) 156 1.3.2.2 skrll return (0); 157 1.3.2.2 skrll 158 1.3.2.2 skrll if (strcmp(cfp->cf_name, "j6x0lcd") != 0) 159 1.3.2.2 skrll return (0); 160 1.3.2.2 skrll 161 1.3.2.2 skrll return (1); 162 1.3.2.2 skrll } 163 1.3.2.2 skrll 164 1.3.2.2 skrll 165 1.3.2.2 skrll static void 166 1.3.2.2 skrll j6x0lcd_attach(struct device *parent, struct device *self, void *aux) 167 1.3.2.2 skrll { 168 1.3.2.2 skrll struct j6x0lcd_softc *sc = (struct j6x0lcd_softc *)self; 169 1.3.2.2 skrll int contrast, i; 170 1.3.2.2 skrll uint16_t bcr, bdr; 171 1.3.2.2 skrll uint8_t dcr, ddr; 172 1.3.2.2 skrll 173 1.3.2.5 skrll /* 174 1.3.2.2 skrll * Brightness is controlled by DAC channel 0. 175 1.3.2.2 skrll */ 176 1.3.2.2 skrll dcr = DAC_(CR); 177 1.3.2.2 skrll dcr &= ~SH7709_DACR_DAE; /* want to control each channel separately */ 178 1.3.2.2 skrll dcr |= SH7709_DACR_DAOE0; /* enable channel 0 */ 179 1.3.2.2 skrll DAC_(CR) = dcr; 180 1.3.2.2 skrll 181 1.3.2.2 skrll ddr = DAC_(DR0); 182 1.3.2.2 skrll sc->sc_brightness = J6X0LCD_DA_TO_BRIGHTNESS(ddr); 183 1.3.2.2 skrll 184 1.3.2.2 skrll 185 1.3.2.2 skrll /* 186 1.3.2.2 skrll * Contrast and power are controlled by HD64461 GPIO port B. 187 1.3.2.2 skrll */ 188 1.3.2.2 skrll bcr = hd64461_reg_read_2(HD64461_GPBCR_REG16); 189 1.3.2.2 skrll bdr = hd64461_reg_read_2(HD64461_GPBDR_REG16); 190 1.3.2.2 skrll 191 1.3.2.2 skrll contrast = 0xf; /* bits are inverted */ 192 1.3.2.2 skrll for (i = 0; i < 4; ++i) { 193 1.3.2.2 skrll unsigned int c, v; 194 1.3.2.2 skrll c = (bcr >> ((6 - i) << 1)) & 0x3; 195 1.3.2.2 skrll if (c == 1) /* gpio mode? */ 196 1.3.2.2 skrll v = 1; 197 1.3.2.2 skrll else 198 1.3.2.2 skrll v = 0; 199 1.3.2.2 skrll contrast &= ~(v << i); 200 1.3.2.2 skrll } 201 1.3.2.2 skrll 202 1.3.2.2 skrll sc->sc_contrast = contrast; 203 1.3.2.2 skrll 204 1.3.2.2 skrll bdr &= ~HD64461_GPBDR_J6X0LCD_OFF; 205 1.3.2.2 skrll bdr |= HD64461_GPBDR_J6X0LCD_CONTRAST_BITS; 206 1.3.2.2 skrll hd64461_reg_write_2(HD64461_GPBDR_REG16, bdr); 207 1.3.2.2 skrll 208 1.3.2.2 skrll bcr &= HD64461_GPBCR_J6X0LCD_OFF_MASK 209 1.3.2.2 skrll & HD64461_GPBCR_J6X0LCD_CONTRAST_MASK; 210 1.3.2.2 skrll bcr |= HD64461_GPBCR_J6X0LCD_OFF_BITS 211 1.3.2.2 skrll | j6x0lcd_contrast_control_bits[contrast]; 212 1.3.2.2 skrll hd64461_reg_write_2(HD64461_GPBCR_REG16, bcr); 213 1.3.2.2 skrll 214 1.3.2.2 skrll printf(": brightness %d, contrast %d\n", 215 1.3.2.2 skrll sc->sc_brightness, sc->sc_contrast); 216 1.3.2.2 skrll 217 1.3.2.2 skrll 218 1.3.2.2 skrll /* LCD brightness hooks */ 219 1.3.2.5 skrll config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_BRIGHTNESS_MAX, 220 1.3.2.2 skrll CONFIG_HOOK_SHARE, 221 1.3.2.2 skrll j6x0lcd_param, sc); 222 1.3.2.5 skrll config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_BRIGHTNESS, 223 1.3.2.2 skrll CONFIG_HOOK_SHARE, 224 1.3.2.2 skrll j6x0lcd_param, sc); 225 1.3.2.5 skrll config_hook(CONFIG_HOOK_SET, CONFIG_HOOK_BRIGHTNESS, 226 1.3.2.2 skrll CONFIG_HOOK_SHARE, 227 1.3.2.2 skrll j6x0lcd_param, sc); 228 1.3.2.2 skrll 229 1.3.2.2 skrll /* LCD contrast hooks */ 230 1.3.2.5 skrll config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_CONTRAST_MAX, 231 1.3.2.2 skrll CONFIG_HOOK_SHARE, 232 1.3.2.2 skrll j6x0lcd_param, sc); 233 1.3.2.5 skrll config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_CONTRAST, 234 1.3.2.2 skrll CONFIG_HOOK_SHARE, 235 1.3.2.2 skrll j6x0lcd_param, sc); 236 1.3.2.5 skrll config_hook(CONFIG_HOOK_SET, CONFIG_HOOK_CONTRAST, 237 1.3.2.2 skrll CONFIG_HOOK_SHARE, 238 1.3.2.2 skrll j6x0lcd_param, sc); 239 1.3.2.2 skrll 240 1.3.2.2 skrll /* LCD on/off hook */ 241 1.3.2.2 skrll config_hook(CONFIG_HOOK_POWERCONTROL, 242 1.3.2.2 skrll CONFIG_HOOK_POWERCONTROL_LCD, 243 1.3.2.2 skrll CONFIG_HOOK_SHARE, 244 1.3.2.2 skrll j6x0lcd_power, sc); 245 1.3.2.2 skrll } 246 1.3.2.2 skrll 247 1.3.2.2 skrll 248 1.3.2.2 skrll static int 249 1.3.2.2 skrll j6x0lcd_param(ctx, type, id, msg) 250 1.3.2.2 skrll void *ctx; 251 1.3.2.2 skrll int type; 252 1.3.2.2 skrll long id; 253 1.3.2.2 skrll void *msg; 254 1.3.2.2 skrll { 255 1.3.2.2 skrll struct j6x0lcd_softc *sc = ctx; 256 1.3.2.2 skrll int value; 257 1.3.2.2 skrll uint16_t bcr; 258 1.3.2.2 skrll uint8_t dr; 259 1.3.2.2 skrll 260 1.3.2.2 skrll switch (type) { 261 1.3.2.2 skrll case CONFIG_HOOK_GET: 262 1.3.2.2 skrll switch (id) { 263 1.3.2.2 skrll case CONFIG_HOOK_CONTRAST: 264 1.3.2.2 skrll *(int *)msg = sc->sc_contrast; 265 1.3.2.2 skrll return (0); 266 1.3.2.2 skrll 267 1.3.2.2 skrll case CONFIG_HOOK_CONTRAST_MAX: 268 1.3.2.2 skrll *(int *)msg = J6X0LCD_CONTRAST_MAX; 269 1.3.2.2 skrll return (0); 270 1.3.2.2 skrll 271 1.3.2.2 skrll case CONFIG_HOOK_BRIGHTNESS: 272 1.3.2.2 skrll *(int *)msg = sc->sc_brightness; 273 1.3.2.2 skrll return (0); 274 1.3.2.2 skrll 275 1.3.2.2 skrll case CONFIG_HOOK_BRIGHTNESS_MAX: 276 1.3.2.2 skrll *(int *)msg = J6X0LCD_BRIGHTNESS_MAX; 277 1.3.2.2 skrll return (0); 278 1.3.2.2 skrll } 279 1.3.2.2 skrll break; 280 1.3.2.2 skrll 281 1.3.2.2 skrll case CONFIG_HOOK_SET: 282 1.3.2.2 skrll value = *(int *)msg; 283 1.3.2.2 skrll if (value < 0) 284 1.3.2.2 skrll value = 0; 285 1.3.2.2 skrll 286 1.3.2.2 skrll switch (id) { 287 1.3.2.2 skrll case CONFIG_HOOK_CONTRAST: 288 1.3.2.2 skrll if (value > J6X0LCD_CONTRAST_MAX) 289 1.3.2.2 skrll value = J6X0LCD_CONTRAST_MAX; 290 1.3.2.2 skrll sc->sc_contrast = value; 291 1.3.2.2 skrll 292 1.3.2.2 skrll bcr = hd64461_reg_read_2(HD64461_GPBCR_REG16); 293 1.3.2.2 skrll bcr &= HD64461_GPBCR_J6X0LCD_CONTRAST_MASK; 294 1.3.2.2 skrll bcr |= j6x0lcd_contrast_control_bits[value]; 295 1.3.2.2 skrll hd64461_reg_write_2(HD64461_GPBCR_REG16, bcr); 296 1.3.2.2 skrll return (0); 297 1.3.2.2 skrll 298 1.3.2.2 skrll case CONFIG_HOOK_BRIGHTNESS: 299 1.3.2.2 skrll if (value > J6X0LCD_BRIGHTNESS_MAX) 300 1.3.2.2 skrll value = J6X0LCD_BRIGHTNESS_MAX; 301 1.3.2.2 skrll sc->sc_brightness = value; 302 1.3.2.2 skrll 303 1.3.2.2 skrll dr = J6X0LCD_BRIGHTNESS_TO_DA(value); 304 1.3.2.2 skrll DAC_(DR0) = dr; 305 1.3.2.2 skrll return (0); 306 1.3.2.2 skrll } 307 1.3.2.2 skrll break; 308 1.3.2.2 skrll } 309 1.3.2.2 skrll 310 1.3.2.2 skrll return (EINVAL); 311 1.3.2.2 skrll } 312 1.3.2.2 skrll 313 1.3.2.2 skrll 314 1.3.2.2 skrll static int 315 1.3.2.2 skrll j6x0lcd_power(ctx, type, id, msg) 316 1.3.2.5 skrll void *ctx; 317 1.3.2.5 skrll int type; 318 1.3.2.5 skrll long id; 319 1.3.2.2 skrll void *msg; 320 1.3.2.2 skrll { 321 1.3.2.2 skrll int on; 322 1.3.2.2 skrll uint16_t r; 323 1.3.2.2 skrll 324 1.3.2.2 skrll if (type != CONFIG_HOOK_POWERCONTROL 325 1.3.2.2 skrll || id != CONFIG_HOOK_POWERCONTROL_LCD) 326 1.3.2.2 skrll return (EINVAL); 327 1.3.2.2 skrll 328 1.3.2.2 skrll on = (int)msg; 329 1.3.2.2 skrll 330 1.3.2.2 skrll r = hd64461_reg_read_2(HD64461_GPBDR_REG16); 331 1.3.2.2 skrll if (on) 332 1.3.2.2 skrll r &= ~HD64461_GPBDR_J6X0LCD_OFF; 333 1.3.2.2 skrll else 334 1.3.2.2 skrll r |= HD64461_GPBDR_J6X0LCD_OFF; 335 1.3.2.2 skrll hd64461_reg_write_2(HD64461_GPBDR_REG16, r); 336 1.3.2.2 skrll 337 1.3.2.2 skrll return (0); 338 1.3.2.2 skrll } 339
Indexes created Tue Sep 30 20:09:53 GMT 2025