j6x0lcd.c revision 1.3.2.2
1 1.3.2.2 skrll /* $NetBSD: j6x0lcd.c,v 1.3.2.2 2004/08/03 10:35:28 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 1.3.2.2 skrll __KERNEL_RCSID(0, "$NetBSD: j6x0lcd.c,v 1.3.2.2 2004/08/03 10:35:28 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/malloc.h> 37 1.3.2.2 skrll #include <sys/systm.h> 38 1.3.2.2 skrll #include <sys/callout.h> 39 1.3.2.2 skrll #ifdef GPROF 40 1.3.2.2 skrll #include <sys/gmon.h> 41 1.3.2.2 skrll #endif 42 1.3.2.2 skrll 43 1.3.2.2 skrll #include <machine/platid.h> 44 1.3.2.2 skrll #include <machine/platid_mask.h> 45 1.3.2.2 skrll 46 1.3.2.2 skrll #include <machine/config_hook.h> 47 1.3.2.2 skrll 48 1.3.2.2 skrll #include <sh3/dacreg.h> 49 1.3.2.2 skrll #include <hpcsh/dev/hd64461/hd64461var.h> /* XXX: for hd64461_reg_read_2 &c */ 50 1.3.2.2 skrll #include <hpcsh/dev/hd64461/hd64461reg.h> 51 1.3.2.2 skrll #include <hpcsh/dev/hd64461/hd64461gpioreg.h> 52 1.3.2.2 skrll 53 1.3.2.2 skrll 54 1.3.2.2 skrll /* 55 1.3.2.2 skrll * LCD power: controlled by pin 0 in HD64461 GPIO port B. 56 1.3.2.2 skrll * 0 - power on 57 1.3.2.2 skrll * 1 - power off 58 1.3.2.2 skrll */ 59 1.3.2.2 skrll #define HD64461_GPBDR_J6X0LCD_OFF 0x01 60 1.3.2.2 skrll 61 1.3.2.2 skrll #define HD64461_GPBCR_J6X0LCD_OFF_MASK 0xfffc 62 1.3.2.2 skrll #define HD64461_GPBCR_J6X0LCD_OFF_BITS 0x0001 63 1.3.2.2 skrll 64 1.3.2.2 skrll 65 1.3.2.2 skrll /* 66 1.3.2.2 skrll * LCD brightness: controlled by DAC channel 0. Larger channel values 67 1.3.2.2 skrll * mean dimmer. Values smaller (i.e. brighter) then 0x5e seems to 68 1.3.2.2 skrll * result in no visible changes. 69 1.3.2.2 skrll */ 70 1.3.2.2 skrll #define J6X0LCD_BRIGHTNESS_DA_MAX 0x5e 71 1.3.2.2 skrll #define J6X0LCD_BRIGHTNESS_DA_MIN 0xff 72 1.3.2.2 skrll 73 1.3.2.2 skrll #define J6X0LCD_DA_TO_BRIGHTNESS(da) \ 74 1.3.2.2 skrll (J6X0LCD_BRIGHTNESS_DA_MIN - (da)) 75 1.3.2.2 skrll 76 1.3.2.2 skrll #define J6X0LCD_BRIGHTNESS_TO_DA(br) \ 77 1.3.2.2 skrll (J6X0LCD_BRIGHTNESS_DA_MIN - (br)) 78 1.3.2.2 skrll 79 1.3.2.2 skrll #define J6X0LCD_BRIGHTNESS_MAX \ 80 1.3.2.2 skrll J6X0LCD_DA_TO_BRIGHTNESS(J6X0LCD_BRIGHTNESS_DA_MAX) 81 1.3.2.2 skrll 82 1.3.2.2 skrll /* convenience macro to accesses DAC registers */ 83 1.3.2.2 skrll #define DAC_(x) (*((volatile uint8_t *)SH7709_DA ## x)) 84 1.3.2.2 skrll 85 1.3.2.2 skrll 86 1.3.2.2 skrll /* 87 1.3.2.2 skrll * LCD contrast: controlled by pins 6,5,4,3 HD64461 GPIO port B. 88 1.3.2.2 skrll * 6th is the least significant bit, 3rd is the most significant. 89 1.3.2.2 skrll * The bits are inverted: .1111... = 0, .0111... = 1, etc. 90 1.3.2.2 skrll * 91 1.3.2.2 skrll * We control the contrast value by setting bits in the data register 92 1.3.2.2 skrll * to all ones, and changing the mode of the bits in the control 93 1.3.2.2 skrll * register, keeping "ones" in gpio output mode (1), and switching 94 1.3.2.2 skrll * "zeros" to input mode (3). This is what WinCE also does. 95 1.3.2.2 skrll * 96 1.3.2.2 skrll * Alternative method is to set the mode of all bits to gpio output 97 1.3.2.2 skrll * mode and then change the bits in the data register. This method 98 1.3.2.2 skrll * results in significantly less contrast screen for the same values. 99 1.3.2.2 skrll * E.g., WinCE default contrast value is 11 (in our numbering, 23 in 100 1.3.2.2 skrll * WinCE's) - which is fine in the "tweak the control register" 101 1.3.2.2 skrll * method, but is very blurry in the "tweak the data register" method. 102 1.3.2.2 skrll * Subjectively, 15 in the "tweak control" method looks like 7 in the 103 1.3.2.2 skrll * "tweak data" method. 104 1.3.2.2 skrll * 105 1.3.2.2 skrll * May be it's possible to control a wider range of contrast by 106 1.3.2.2 skrll * combining the two methods, but values above 7 in the "tweak data" 107 1.3.2.2 skrll * method are so blurry that they are next to unusable in practice. 108 1.3.2.2 skrll */ 109 1.3.2.2 skrll #define J6X0LCD_CONTRAST_MAX 15 110 1.3.2.2 skrll 111 1.3.2.2 skrll #define HD64461_GPBDR_J6X0LCD_CONTRAST_MASK 0x87 112 1.3.2.2 skrll #define HD64461_GPBDR_J6X0LCD_CONTRAST_BITS 0x78 113 1.3.2.2 skrll 114 1.3.2.2 skrll #if 0 115 1.3.2.2 skrll /* "tweak data" */ 116 1.3.2.2 skrll static uint8_t j6x0lcd_contrast_data_bits[] = { 117 1.3.2.2 skrll 0x78, 0x38, 0x58, 0x18, 0x68, 0x28, 0x48, 0x08, 118 1.3.2.2 skrll 0x70, 0x30, 0x50, 0x10, 0x60, 0x20, 0x40, 0x00 119 1.3.2.2 skrll }; 120 1.3.2.2 skrll #endif 121 1.3.2.2 skrll 122 1.3.2.2 skrll #define HD64461_GPBCR_J6X0LCD_CONTRAST_MASK 0xc03f 123 1.3.2.2 skrll #define HD64461_GPBCR_J6X0LCD_CONTRAST_BITS 0x1540 124 1.3.2.2 skrll 125 1.3.2.2 skrll /* "tweak control" */ 126 1.3.2.2 skrll static uint16_t j6x0lcd_contrast_control_bits[] = { 127 1.3.2.2 skrll 0x1540, 0x3540, 0x1d40, 0x3d40, 0x1740, 0x3740, 0x1f40, 0x3f40, 128 1.3.2.2 skrll 0x15c0, 0x35c0, 0x1dc0, 0x3dc0, 0x17c0, 0x37c0, 0x1fc0, 0x3fc0 129 1.3.2.2 skrll }; 130 1.3.2.2 skrll 131 1.3.2.2 skrll 132 1.3.2.2 skrll struct j6x0lcd_softc { 133 1.3.2.2 skrll struct device sc_dev; 134 1.3.2.2 skrll int sc_brightness; 135 1.3.2.2 skrll int sc_contrast; 136 1.3.2.2 skrll }; 137 1.3.2.2 skrll 138 1.3.2.2 skrll static int j6x0lcd_match(struct device *, struct cfdata *, void *); 139 1.3.2.2 skrll static void j6x0lcd_attach(struct device *, struct device *, void *); 140 1.3.2.2 skrll 141 1.3.2.2 skrll CFATTACH_DECL(j6x0lcd, sizeof(struct j6x0lcd_softc), 142 1.3.2.2 skrll j6x0lcd_match, j6x0lcd_attach, NULL, NULL); 143 1.3.2.2 skrll 144 1.3.2.2 skrll 145 1.3.2.2 skrll static int j6x0lcd_param(void *, int, long, void *); 146 1.3.2.2 skrll static int j6x0lcd_power(void *, int, long, void *); 147 1.3.2.2 skrll 148 1.3.2.2 skrll 149 1.3.2.2 skrll static int 150 1.3.2.2 skrll j6x0lcd_match(struct device *parent, struct cfdata *cfp, void *aux) 151 1.3.2.2 skrll { 152 1.3.2.2 skrll 153 1.3.2.2 skrll /* 154 1.3.2.2 skrll * XXX: does platid_mask_MACH_HP_LX matches _JORNADA_6XX too? 155 1.3.2.2 skrll * Is 620 wired similarly? 156 1.3.2.2 skrll */ 157 1.3.2.2 skrll if (!platid_match(&platid, &platid_mask_MACH_HP_JORNADA_6XX)) 158 1.3.2.2 skrll return (0); 159 1.3.2.2 skrll 160 1.3.2.2 skrll if (strcmp(cfp->cf_name, "j6x0lcd") != 0) 161 1.3.2.2 skrll return (0); 162 1.3.2.2 skrll 163 1.3.2.2 skrll return (1); 164 1.3.2.2 skrll } 165 1.3.2.2 skrll 166 1.3.2.2 skrll 167 1.3.2.2 skrll static void 168 1.3.2.2 skrll j6x0lcd_attach(struct device *parent, struct device *self, void *aux) 169 1.3.2.2 skrll { 170 1.3.2.2 skrll struct j6x0lcd_softc *sc = (struct j6x0lcd_softc *)self; 171 1.3.2.2 skrll int contrast, i; 172 1.3.2.2 skrll uint16_t bcr, bdr; 173 1.3.2.2 skrll uint8_t dcr, ddr; 174 1.3.2.2 skrll 175 1.3.2.2 skrll /* 176 1.3.2.2 skrll * Brightness is controlled by DAC channel 0. 177 1.3.2.2 skrll */ 178 1.3.2.2 skrll dcr = DAC_(CR); 179 1.3.2.2 skrll dcr &= ~SH7709_DACR_DAE; /* want to control each channel separately */ 180 1.3.2.2 skrll dcr |= SH7709_DACR_DAOE0; /* enable channel 0 */ 181 1.3.2.2 skrll DAC_(CR) = dcr; 182 1.3.2.2 skrll 183 1.3.2.2 skrll ddr = DAC_(DR0); 184 1.3.2.2 skrll sc->sc_brightness = J6X0LCD_DA_TO_BRIGHTNESS(ddr); 185 1.3.2.2 skrll 186 1.3.2.2 skrll 187 1.3.2.2 skrll /* 188 1.3.2.2 skrll * Contrast and power are controlled by HD64461 GPIO port B. 189 1.3.2.2 skrll */ 190 1.3.2.2 skrll bcr = hd64461_reg_read_2(HD64461_GPBCR_REG16); 191 1.3.2.2 skrll bdr = hd64461_reg_read_2(HD64461_GPBDR_REG16); 192 1.3.2.2 skrll 193 1.3.2.2 skrll contrast = 0xf; /* bits are inverted */ 194 1.3.2.2 skrll for (i = 0; i < 4; ++i) { 195 1.3.2.2 skrll unsigned int c, v; 196 1.3.2.2 skrll c = (bcr >> ((6 - i) << 1)) & 0x3; 197 1.3.2.2 skrll if (c == 1) /* gpio mode? */ 198 1.3.2.2 skrll v = 1; 199 1.3.2.2 skrll else 200 1.3.2.2 skrll v = 0; 201 1.3.2.2 skrll contrast &= ~(v << i); 202 1.3.2.2 skrll } 203 1.3.2.2 skrll 204 1.3.2.2 skrll sc->sc_contrast = contrast; 205 1.3.2.2 skrll 206 1.3.2.2 skrll bdr &= ~HD64461_GPBDR_J6X0LCD_OFF; 207 1.3.2.2 skrll bdr |= HD64461_GPBDR_J6X0LCD_CONTRAST_BITS; 208 1.3.2.2 skrll hd64461_reg_write_2(HD64461_GPBDR_REG16, bdr); 209 1.3.2.2 skrll 210 1.3.2.2 skrll bcr &= HD64461_GPBCR_J6X0LCD_OFF_MASK 211 1.3.2.2 skrll & HD64461_GPBCR_J6X0LCD_CONTRAST_MASK; 212 1.3.2.2 skrll bcr |= HD64461_GPBCR_J6X0LCD_OFF_BITS 213 1.3.2.2 skrll | j6x0lcd_contrast_control_bits[contrast]; 214 1.3.2.2 skrll hd64461_reg_write_2(HD64461_GPBCR_REG16, bcr); 215 1.3.2.2 skrll 216 1.3.2.2 skrll printf(": brightness %d, contrast %d\n", 217 1.3.2.2 skrll sc->sc_brightness, sc->sc_contrast); 218 1.3.2.2 skrll 219 1.3.2.2 skrll 220 1.3.2.2 skrll /* LCD brightness hooks */ 221 1.3.2.2 skrll config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_BRIGHTNESS_MAX, 222 1.3.2.2 skrll CONFIG_HOOK_SHARE, 223 1.3.2.2 skrll j6x0lcd_param, sc); 224 1.3.2.2 skrll config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_BRIGHTNESS, 225 1.3.2.2 skrll CONFIG_HOOK_SHARE, 226 1.3.2.2 skrll j6x0lcd_param, sc); 227 1.3.2.2 skrll config_hook(CONFIG_HOOK_SET, CONFIG_HOOK_BRIGHTNESS, 228 1.3.2.2 skrll CONFIG_HOOK_SHARE, 229 1.3.2.2 skrll j6x0lcd_param, sc); 230 1.3.2.2 skrll 231 1.3.2.2 skrll /* LCD contrast hooks */ 232 1.3.2.2 skrll config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_CONTRAST_MAX, 233 1.3.2.2 skrll CONFIG_HOOK_SHARE, 234 1.3.2.2 skrll j6x0lcd_param, sc); 235 1.3.2.2 skrll config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_CONTRAST, 236 1.3.2.2 skrll CONFIG_HOOK_SHARE, 237 1.3.2.2 skrll j6x0lcd_param, sc); 238 1.3.2.2 skrll config_hook(CONFIG_HOOK_SET, CONFIG_HOOK_CONTRAST, 239 1.3.2.2 skrll CONFIG_HOOK_SHARE, 240 1.3.2.2 skrll j6x0lcd_param, sc); 241 1.3.2.2 skrll 242 1.3.2.2 skrll /* LCD on/off hook */ 243 1.3.2.2 skrll config_hook(CONFIG_HOOK_POWERCONTROL, 244 1.3.2.2 skrll CONFIG_HOOK_POWERCONTROL_LCD, 245 1.3.2.2 skrll CONFIG_HOOK_SHARE, 246 1.3.2.2 skrll j6x0lcd_power, sc); 247 1.3.2.2 skrll } 248 1.3.2.2 skrll 249 1.3.2.2 skrll 250 1.3.2.2 skrll static int 251 1.3.2.2 skrll j6x0lcd_param(ctx, type, id, msg) 252 1.3.2.2 skrll void *ctx; 253 1.3.2.2 skrll int type; 254 1.3.2.2 skrll long id; 255 1.3.2.2 skrll void *msg; 256 1.3.2.2 skrll { 257 1.3.2.2 skrll struct j6x0lcd_softc *sc = ctx; 258 1.3.2.2 skrll int value; 259 1.3.2.2 skrll uint16_t bcr; 260 1.3.2.2 skrll uint8_t dr; 261 1.3.2.2 skrll 262 1.3.2.2 skrll switch (type) { 263 1.3.2.2 skrll case CONFIG_HOOK_GET: 264 1.3.2.2 skrll switch (id) { 265 1.3.2.2 skrll case CONFIG_HOOK_CONTRAST: 266 1.3.2.2 skrll *(int *)msg = sc->sc_contrast; 267 1.3.2.2 skrll return (0); 268 1.3.2.2 skrll 269 1.3.2.2 skrll case CONFIG_HOOK_CONTRAST_MAX: 270 1.3.2.2 skrll *(int *)msg = J6X0LCD_CONTRAST_MAX; 271 1.3.2.2 skrll return (0); 272 1.3.2.2 skrll 273 1.3.2.2 skrll case CONFIG_HOOK_BRIGHTNESS: 274 1.3.2.2 skrll *(int *)msg = sc->sc_brightness; 275 1.3.2.2 skrll return (0); 276 1.3.2.2 skrll 277 1.3.2.2 skrll case CONFIG_HOOK_BRIGHTNESS_MAX: 278 1.3.2.2 skrll *(int *)msg = J6X0LCD_BRIGHTNESS_MAX; 279 1.3.2.2 skrll return (0); 280 1.3.2.2 skrll } 281 1.3.2.2 skrll break; 282 1.3.2.2 skrll 283 1.3.2.2 skrll case CONFIG_HOOK_SET: 284 1.3.2.2 skrll value = *(int *)msg; 285 1.3.2.2 skrll if (value < 0) 286 1.3.2.2 skrll value = 0; 287 1.3.2.2 skrll 288 1.3.2.2 skrll switch (id) { 289 1.3.2.2 skrll case CONFIG_HOOK_CONTRAST: 290 1.3.2.2 skrll if (value > J6X0LCD_CONTRAST_MAX) 291 1.3.2.2 skrll value = J6X0LCD_CONTRAST_MAX; 292 1.3.2.2 skrll sc->sc_contrast = value; 293 1.3.2.2 skrll 294 1.3.2.2 skrll bcr = hd64461_reg_read_2(HD64461_GPBCR_REG16); 295 1.3.2.2 skrll bcr &= HD64461_GPBCR_J6X0LCD_CONTRAST_MASK; 296 1.3.2.2 skrll bcr |= j6x0lcd_contrast_control_bits[value]; 297 1.3.2.2 skrll hd64461_reg_write_2(HD64461_GPBCR_REG16, bcr); 298 1.3.2.2 skrll return (0); 299 1.3.2.2 skrll 300 1.3.2.2 skrll case CONFIG_HOOK_BRIGHTNESS: 301 1.3.2.2 skrll if (value > J6X0LCD_BRIGHTNESS_MAX) 302 1.3.2.2 skrll value = J6X0LCD_BRIGHTNESS_MAX; 303 1.3.2.2 skrll sc->sc_brightness = value; 304 1.3.2.2 skrll 305 1.3.2.2 skrll dr = J6X0LCD_BRIGHTNESS_TO_DA(value); 306 1.3.2.2 skrll DAC_(DR0) = dr; 307 1.3.2.2 skrll return (0); 308 1.3.2.2 skrll } 309 1.3.2.2 skrll break; 310 1.3.2.2 skrll } 311 1.3.2.2 skrll 312 1.3.2.2 skrll return (EINVAL); 313 1.3.2.2 skrll } 314 1.3.2.2 skrll 315 1.3.2.2 skrll 316 1.3.2.2 skrll static int 317 1.3.2.2 skrll j6x0lcd_power(ctx, type, id, msg) 318 1.3.2.2 skrll void *ctx; 319 1.3.2.2 skrll int type; 320 1.3.2.2 skrll long id; 321 1.3.2.2 skrll void *msg; 322 1.3.2.2 skrll { 323 1.3.2.2 skrll int on; 324 1.3.2.2 skrll uint16_t r; 325 1.3.2.2 skrll 326 1.3.2.2 skrll if (type != CONFIG_HOOK_POWERCONTROL 327 1.3.2.2 skrll || id != CONFIG_HOOK_POWERCONTROL_LCD) 328 1.3.2.2 skrll return (EINVAL); 329 1.3.2.2 skrll 330 1.3.2.2 skrll on = (int)msg; 331 1.3.2.2 skrll 332 1.3.2.2 skrll r = hd64461_reg_read_2(HD64461_GPBDR_REG16); 333 1.3.2.2 skrll if (on) 334 1.3.2.2 skrll r &= ~HD64461_GPBDR_J6X0LCD_OFF; 335 1.3.2.2 skrll else 336 1.3.2.2 skrll r |= HD64461_GPBDR_J6X0LCD_OFF; 337 1.3.2.2 skrll hd64461_reg_write_2(HD64461_GPBDR_REG16, r); 338 1.3.2.2 skrll 339 1.3.2.2 skrll return (0); 340 1.3.2.2 skrll } 341
Indexes created Wed Oct 01 19:09:53 GMT 2025