j6x0pwr.c revision 1.14
1 /* $NetBSD: j6x0pwr.c,v 1.14 2008/03/27 03:34:14 uwe Exp $ */ 2 3 /* 4 * Copyright (c) 2003, 2006 Valeriy E. Ushakov 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: j6x0pwr.c,v 1.14 2008/03/27 03:34:14 uwe Exp $"); 32 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/device.h> 36 #include <sys/malloc.h> 37 #include <sys/systm.h> 38 #include <sys/callout.h> 39 40 #include <dev/apm/apmbios.h> 41 42 #include <machine/platid.h> 43 #include <machine/platid_mask.h> 44 #include <machine/config_hook.h> 45 46 #include <sh3/exception.h> 47 #include <sh3/intcreg.h> 48 #include <sh3/pfcreg.h> 49 50 #include <sh3/dev/adcvar.h> 51 52 53 /* SH7709 PFC bits pertinent to Jornada 6x0 power */ 54 #define PGDR_MAIN_BATTERY_OUT 0x04 55 #define PGDR_LID_OPEN 0x01 56 #define PJDR_AC_POWER_OUT 0x10 57 #define PLDR_BATTERY_CHARGED 0x20 58 59 60 static inline int __attribute__((__always_inline__)) 61 j6x0pwr_battery_is_absent(void) 62 { 63 64 return _reg_read_1(SH7709_PGDR) & PGDR_MAIN_BATTERY_OUT; 65 } 66 67 static inline int __attribute__((__always_inline__)) 68 j6x0pwr_ac_is_off(void) 69 { 70 71 return _reg_read_1(SH7709_PJDR) & PJDR_AC_POWER_OUT; 72 } 73 74 75 static inline int __attribute__((__always_inline__)) 76 j6x0pwr_is_not_charging(void) 77 { 78 79 return _reg_read_1(SH7709_PLDR) & PLDR_BATTERY_CHARGED; 80 } 81 82 83 /* A/D converter channels to get power stats from */ 84 #define ADC_CHANNEL_BATTERY 3 /* main battery */ 85 #define ADC_CHANNEL_BACKUP 4 /* backup battery - we don't report it */ 86 #define ADC_CHANNEL_CHARGE 5 /* we use PLDR_BATTERY_CHARGED instead */ 87 88 /* 89 * Empirical range of battery values. 90 * Thanks to Joseph Heenan for measurements. 91 */ 92 #define J6X0PWR_BATTERY_MIN 630 93 #define J6X0PWR_BATTERY_CRITICAL 635 94 #define J6X0PWR_BATTERY_LOW 645 95 #define J6X0PWR_BATTERY_FULL 910 /* can be slightly more */ 96 97 98 /* Convenience aliases (XXX: should be provided by config_hook.h) */ 99 #define CONFIG_HOOK_BUTTON_PRESSED ((void *)1) 100 #define CONFIG_HOOK_BUTTON_RELEASED ((void *)0) 101 102 103 104 /* allow only one instance */ 105 static int j6x0pwr_attached = 0; 106 107 struct j6x0pwr_softc { 108 device_t sc_dev; 109 110 void *sc_ih; 111 volatile int sc_poweroff; 112 }; 113 114 static int j6x0pwr_match(device_t, cfdata_t, void *); 115 static void j6x0pwr_attach(device_t, device_t, void *); 116 117 CFATTACH_DECL_NEW(j6x0pwr, sizeof(struct j6x0pwr_softc), 118 j6x0pwr_match, j6x0pwr_attach, NULL, NULL); 119 120 121 static int j6x0pwr_apm_getpower_hook(void *, int, long, void *); 122 static int j6x0pwr_get_battery(void); /* from ADC */ 123 124 static int j6x0pwr_intr(void *); 125 static void j6x0pwr_sleep(void *); 126 static int j6x0pwr_clear_interrupt(void); 127 128 129 static int 130 j6x0pwr_match(device_t parent, cfdata_t cfp, void *aux) 131 { 132 133 /* 134 * XXX: does platid_mask_MACH_HP_LX matches _JORNADA_6XX too? 135 * Is 620 wired similarly? 136 */ 137 if (!platid_match(&platid, &platid_mask_MACH_HP_JORNADA_6XX)) 138 return 0; 139 140 if (strcmp(cfp->cf_name, "j6x0pwr") != 0) 141 return 0; 142 143 /* allow only one instance */ 144 return !j6x0pwr_attached; 145 } 146 147 148 static void 149 j6x0pwr_attach(device_t parent, device_t self, void *aux) 150 { 151 struct j6x0pwr_softc *sc; 152 153 /* XXX: in machdep.c */ 154 extern void (*__sleep_func)(void *); 155 extern void *__sleep_ctx; 156 157 sc = device_private(self); 158 sc->sc_dev = self; 159 160 aprint_naive("\n"); 161 aprint_normal("\n"); 162 163 /* allow only one instance */ 164 j6x0pwr_attached = 1; 165 166 /* arrange for hpcapm to call us when power status is requested */ 167 config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_ACADAPTER, 168 CONFIG_HOOK_EXCLUSIVE, 169 j6x0pwr_apm_getpower_hook, sc); 170 config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_CHARGE, 171 CONFIG_HOOK_EXCLUSIVE, 172 j6x0pwr_apm_getpower_hook, sc); 173 config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_BATTERYVAL, 174 CONFIG_HOOK_EXCLUSIVE, 175 j6x0pwr_apm_getpower_hook, sc); 176 177 /* register sleep function to APM */ 178 __sleep_func = j6x0pwr_sleep; 179 __sleep_ctx = sc; 180 181 sc->sc_poweroff = 0; 182 183 /* drain the old interrupt */ 184 j6x0pwr_clear_interrupt(); 185 186 sc->sc_ih = intc_intr_establish(SH7709_INTEVT2_IRQ0, IST_EDGE, IPL_TTY, 187 j6x0pwr_intr, sc); 188 189 _reg_write_1(SH7709_PKDR, 0); /* Green LED on */ 190 } 191 192 193 /* 194 * Triggered when the On/Off button is pressed or the lid is closed. 195 * The state of the lid is reflected in the bit PGDR[0]. 196 * Closing the lid can trigger several consecutive interrupts. 197 * 198 * XXX: Since we don't put the machine to sleep, I have no idea how 199 * wakeup interrupt(s) look like. Need to revisit when software 200 * suspend is added to the kernel (which we need to support ACPI). 201 */ 202 static int 203 j6x0pwr_intr(void *arg) 204 { 205 struct j6x0pwr_softc *sc = arg; 206 device_t self = sc->sc_dev; 207 uint8_t irr0; 208 uint8_t pgdr; 209 210 irr0 = j6x0pwr_clear_interrupt(); 211 if ((irr0 & IRR0_IRQ0) == 0) { 212 #ifdef DIAGNOSTIC 213 aprint_normal_dev(self, "irr0=0x%02x?\n", irr0); 214 #endif 215 return 0; 216 } 217 218 pgdr = _reg_read_1(SH7709_PGDR); 219 if ((pgdr & PGDR_LID_OPEN) == 0) { 220 aprint_normal_dev(self, "lid closed %d\n", sc->sc_poweroff); 221 if (sc->sc_poweroff) 222 return 1; 223 } else { 224 aprint_normal_dev(self, "ON/OFF %d\n", sc->sc_poweroff); 225 if (sc->sc_poweroff) 226 sc->sc_poweroff = 0; 227 } 228 229 config_hook_call(CONFIG_HOOK_BUTTONEVENT, 230 CONFIG_HOOK_BUTTONEVENT_POWER, 231 CONFIG_HOOK_BUTTON_PRESSED); 232 /* fake release */ 233 config_hook_call(CONFIG_HOOK_BUTTONEVENT, 234 CONFIG_HOOK_BUTTONEVENT_POWER, 235 CONFIG_HOOK_BUTTON_RELEASED); 236 237 return 1; 238 } 239 240 241 static int 242 j6x0pwr_clear_interrupt(void) 243 { 244 uint8_t irr0; 245 246 irr0 = _reg_read_1(SH7709_IRR0); 247 if (irr0 & IRR0_IRQ0) 248 _reg_write_1(SH7709_IRR0, irr0 & ~IRR0_IRQ0); 249 250 return irr0; 251 } 252 253 254 void 255 j6x0pwr_sleep(void *arg) 256 { 257 /* splhigh on entry */ 258 struct j6x0pwr_softc *sc = arg; 259 int s; 260 261 /* Reinstall j6x0pwr_intr as a wakeup handler */ 262 intc_intr_disestablish(sc->sc_ih); 263 sc->sc_ih = intc_intr_establish(SH7709_INTEVT2_IRQ0, IST_EDGE, IPL_HIGH, 264 j6x0pwr_intr, sc); 265 sc->sc_poweroff = 1; 266 do { 267 /* Disable interrupt except for power button. */ 268 s = _cpu_intr_resume(IPL_CLOCK << 4); 269 _reg_write_1(SH7709_PKDR, 0xff); /* Green LED off */ 270 271 __asm volatile("sleep"); 272 273 _reg_write_1(SH7709_PKDR, 0); /* Green LED on */ 274 _cpu_intr_resume(s); 275 } while (sc->sc_poweroff); 276 277 /* Return to normal power button */ 278 intc_intr_disestablish(sc->sc_ih); 279 sc->sc_ih = intc_intr_establish(SH7709_INTEVT2_IRQ0, IST_EDGE, IPL_TTY, 280 j6x0pwr_intr, sc); 281 /* splhigh on exit */ 282 } 283 284 285 static int 286 j6x0pwr_apm_getpower_hook(void *ctx, int type, long id, void *msg) 287 { 288 /* struct j6x0pwr_softc * const sc = ctx; */ 289 int * const pval = msg; 290 int battery, state; 291 292 if (type != CONFIG_HOOK_GET) 293 return EINVAL; 294 295 switch (id) { 296 297 case CONFIG_HOOK_ACADAPTER: 298 *pval = j6x0pwr_ac_is_off() ? APM_AC_OFF : APM_AC_ON; 299 return 0; 300 301 case CONFIG_HOOK_CHARGE: 302 if (j6x0pwr_battery_is_absent()) 303 state = APM_BATT_FLAG_NO_SYSTEM_BATTERY; 304 else { 305 battery = j6x0pwr_get_battery(); 306 if (battery < J6X0PWR_BATTERY_CRITICAL) 307 state = APM_BATT_FLAG_CRITICAL; 308 else if (battery < J6X0PWR_BATTERY_LOW) 309 state = APM_BATT_FLAG_LOW; 310 else 311 state = APM_BATT_FLAG_HIGH; /* XXX? */ 312 313 if (!j6x0pwr_is_not_charging()) 314 state |= APM_BATT_FLAG_CHARGING; 315 } 316 *pval = state; 317 return 0; 318 319 case CONFIG_HOOK_BATTERYVAL: 320 if (j6x0pwr_battery_is_absent()) 321 state = 0; 322 else { 323 battery = j6x0pwr_get_battery(); 324 if (battery > J6X0PWR_BATTERY_FULL) 325 state = 100; 326 else 327 state = 100 * (battery - J6X0PWR_BATTERY_MIN) 328 / (J6X0PWR_BATTERY_FULL 329 - J6X0PWR_BATTERY_MIN); 330 } 331 *pval = state; 332 return 0; 333 } 334 335 return EINVAL; 336 } 337 338 339 static int 340 j6x0pwr_get_battery(void) 341 { 342 int battery; 343 int s; 344 345 if (j6x0pwr_battery_is_absent()) 346 return -1; 347 348 s = spltty(); 349 battery = adc_sample_channel(ADC_CHANNEL_BATTERY); 350 splx(s); 351 352 return battery; 353 } 354
Indexes created Fri Sep 26 08:10:20 GMT 2025