j6x0pwr.c revision 1.14.4.1
1 /* $NetBSD: j6x0pwr.c,v 1.14.4.1 2009/05/04 08:11:13 yamt 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 1.14.4.1 2009/05/04 08:11:13 yamt 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 if (!pmf_device_register(self, NULL, NULL)) 192 aprint_error_dev(self, "unable to establish power handler\n"); 193 } 194 195 196 /* 197 * Triggered when the On/Off button is pressed or the lid is closed. 198 * The state of the lid is reflected in the bit PGDR[0]. 199 * Closing the lid can trigger several consecutive interrupts. 200 * 201 * XXX: Since we don't put the machine to sleep, I have no idea how 202 * wakeup interrupt(s) look like. Need to revisit when software 203 * suspend is added to the kernel (which we need to support ACPI). 204 */ 205 static int 206 j6x0pwr_intr(void *arg) 207 { 208 struct j6x0pwr_softc *sc = arg; 209 device_t self = sc->sc_dev; 210 uint8_t irr0; 211 uint8_t pgdr; 212 213 irr0 = j6x0pwr_clear_interrupt(); 214 if ((irr0 & IRR0_IRQ0) == 0) { 215 #ifdef DIAGNOSTIC 216 aprint_normal_dev(self, "irr0=0x%02x?\n", irr0); 217 #endif 218 return 0; 219 } 220 221 pgdr = _reg_read_1(SH7709_PGDR); 222 if ((pgdr & PGDR_LID_OPEN) == 0) { 223 aprint_normal_dev(self, "lid closed %d\n", sc->sc_poweroff); 224 if (sc->sc_poweroff) 225 return 1; 226 } else { 227 aprint_normal_dev(self, "ON/OFF %d\n", sc->sc_poweroff); 228 if (sc->sc_poweroff) 229 sc->sc_poweroff = 0; 230 } 231 232 config_hook_call(CONFIG_HOOK_BUTTONEVENT, 233 CONFIG_HOOK_BUTTONEVENT_POWER, 234 CONFIG_HOOK_BUTTON_PRESSED); 235 /* fake release */ 236 config_hook_call(CONFIG_HOOK_BUTTONEVENT, 237 CONFIG_HOOK_BUTTONEVENT_POWER, 238 CONFIG_HOOK_BUTTON_RELEASED); 239 240 return 1; 241 } 242 243 244 static int 245 j6x0pwr_clear_interrupt(void) 246 { 247 uint8_t irr0; 248 249 irr0 = _reg_read_1(SH7709_IRR0); 250 if (irr0 & IRR0_IRQ0) 251 _reg_write_1(SH7709_IRR0, irr0 & ~IRR0_IRQ0); 252 253 return irr0; 254 } 255 256 257 void 258 j6x0pwr_sleep(void *arg) 259 { 260 /* splhigh on entry */ 261 struct j6x0pwr_softc *sc = arg; 262 int s; 263 264 /* Reinstall j6x0pwr_intr as a wakeup handler */ 265 intc_intr_disestablish(sc->sc_ih); 266 sc->sc_ih = intc_intr_establish(SH7709_INTEVT2_IRQ0, IST_EDGE, IPL_HIGH, 267 j6x0pwr_intr, sc); 268 sc->sc_poweroff = 1; 269 do { 270 /* Disable interrupt except for power button. */ 271 s = _cpu_intr_resume(IPL_CLOCK << 4); 272 _reg_write_1(SH7709_PKDR, 0xff); /* Green LED off */ 273 274 __asm volatile("sleep"); 275 276 _reg_write_1(SH7709_PKDR, 0); /* Green LED on */ 277 _cpu_intr_resume(s); 278 } while (sc->sc_poweroff); 279 280 /* Return to normal power button */ 281 intc_intr_disestablish(sc->sc_ih); 282 sc->sc_ih = intc_intr_establish(SH7709_INTEVT2_IRQ0, IST_EDGE, IPL_TTY, 283 j6x0pwr_intr, sc); 284 /* splhigh on exit */ 285 } 286 287 288 static int 289 j6x0pwr_apm_getpower_hook(void *ctx, int type, long id, void *msg) 290 { 291 /* struct j6x0pwr_softc * const sc = ctx; */ 292 int * const pval = msg; 293 int battery, state; 294 295 if (type != CONFIG_HOOK_GET) 296 return EINVAL; 297 298 switch (id) { 299 300 case CONFIG_HOOK_ACADAPTER: 301 *pval = j6x0pwr_ac_is_off() ? APM_AC_OFF : APM_AC_ON; 302 return 0; 303 304 case CONFIG_HOOK_CHARGE: 305 if (j6x0pwr_battery_is_absent()) 306 state = APM_BATT_FLAG_NO_SYSTEM_BATTERY; 307 else { 308 battery = j6x0pwr_get_battery(); 309 if (battery < J6X0PWR_BATTERY_CRITICAL) 310 state = APM_BATT_FLAG_CRITICAL; 311 else if (battery < J6X0PWR_BATTERY_LOW) 312 state = APM_BATT_FLAG_LOW; 313 else 314 state = APM_BATT_FLAG_HIGH; /* XXX? */ 315 316 if (!j6x0pwr_is_not_charging()) 317 state |= APM_BATT_FLAG_CHARGING; 318 } 319 *pval = state; 320 return 0; 321 322 case CONFIG_HOOK_BATTERYVAL: 323 if (j6x0pwr_battery_is_absent()) 324 state = 0; 325 else { 326 battery = j6x0pwr_get_battery(); 327 if (battery > J6X0PWR_BATTERY_FULL) 328 state = 100; 329 else 330 state = 100 * (battery - J6X0PWR_BATTERY_MIN) 331 / (J6X0PWR_BATTERY_FULL 332 - J6X0PWR_BATTERY_MIN); 333 } 334 *pval = state; 335 return 0; 336 } 337 338 return EINVAL; 339 } 340 341 342 static int 343 j6x0pwr_get_battery(void) 344 { 345 int battery; 346 int s; 347 348 if (j6x0pwr_battery_is_absent()) 349 return -1; 350 351 s = spltty(); 352 battery = adc_sample_channel(ADC_CHANNEL_BATTERY); 353 splx(s); 354 355 return battery; 356 } 357
Indexes created Sun Oct 19 16:10:00 GMT 2025