2 * Copyright (c) 2009 Nathan Whitehorn
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
19 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
21 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
22 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/module.h>
37 #include <sys/clock.h>
38 #include <sys/ctype.h>
39 #include <sys/kernel.h>
40 #include <sys/kthread.h>
41 #include <sys/reboot.h>
43 #include <sys/sysctl.h>
44 #include <sys/unistd.h>
46 #include <machine/bus.h>
47 #include <machine/intr_machdep.h>
48 #include <machine/md_var.h>
50 #include <dev/iicbus/iicbus.h>
51 #include <dev/iicbus/iiconf.h>
52 #include <dev/led/led.h>
53 #include <dev/ofw/openfirm.h>
54 #include <dev/ofw/ofw_bus.h>
55 #include <dev/ofw/ofw_bus_subr.h>
56 #include <powerpc/powermac/macgpiovar.h>
57 #include <powerpc/powermac/powermac_thermal.h>
60 #include "iicbus_if.h"
67 STAILQ_ENTRY(smu_cmd) cmd_q;
70 STAILQ_HEAD(smu_cmdq, smu_cmd);
86 /* We can read the PWM and the RPM from a PWM controlled fan.
87 * Offer both values via sysctl.
90 SMU_PWM_SYSCTL_PWM = 1 << 8,
91 SMU_PWM_SYSCTL_RPM = 2 << 8
95 struct pmac_therm therm;
111 struct resource *sc_memr;
115 bus_dma_tag_t sc_dmatag;
116 bus_space_tag_t sc_bt;
117 bus_space_handle_t sc_mailbox;
119 struct smu_cmd *sc_cmd, *sc_cur_cmd;
120 bus_addr_t sc_cmd_phys;
121 bus_dmamap_t sc_cmd_dmamap;
122 struct smu_cmdq sc_cmdq;
124 struct smu_fan *sc_fans;
127 struct smu_sensor *sc_sensors;
130 int sc_doorbellirqid;
131 struct resource *sc_doorbellirq;
132 void *sc_doorbellirqcookie;
134 struct proc *sc_fanmgt_proc;
135 time_t sc_lastuserchange;
137 /* Calibration data */
138 uint16_t sc_cpu_diode_scale;
139 int16_t sc_cpu_diode_offset;
141 uint16_t sc_cpu_volt_scale;
142 int16_t sc_cpu_volt_offset;
143 uint16_t sc_cpu_curr_scale;
144 int16_t sc_cpu_curr_offset;
146 uint16_t sc_slots_pow_scale;
147 int16_t sc_slots_pow_offset;
149 struct cdev *sc_leddev;
152 /* regular bus attachment functions */
154 static int smu_probe(device_t);
155 static int smu_attach(device_t);
156 static const struct ofw_bus_devinfo *
157 smu_get_devinfo(device_t bus, device_t dev);
159 /* cpufreq notification hooks */
161 static void smu_cpufreq_pre_change(device_t, const struct cf_level *level);
162 static void smu_cpufreq_post_change(device_t, const struct cf_level *level);
164 /* clock interface */
165 static int smu_gettime(device_t dev, struct timespec *ts);
166 static int smu_settime(device_t dev, struct timespec *ts);
168 /* utility functions */
169 static int smu_run_cmd(device_t dev, struct smu_cmd *cmd, int wait);
170 static int smu_get_datablock(device_t dev, int8_t id, uint8_t *buf,
172 static void smu_attach_i2c(device_t dev, phandle_t i2croot);
173 static void smu_attach_fans(device_t dev, phandle_t fanroot);
174 static void smu_attach_sensors(device_t dev, phandle_t sensroot);
175 static void smu_set_sleepled(void *xdev, int onoff);
176 static int smu_server_mode(SYSCTL_HANDLER_ARGS);
177 static void smu_doorbell_intr(void *xdev);
178 static void smu_shutdown(void *xdev, int howto);
180 /* where to find the doorbell GPIO */
182 static device_t smu_doorbell = NULL;
184 static device_method_t smu_methods[] = {
185 /* Device interface */
186 DEVMETHOD(device_probe, smu_probe),
187 DEVMETHOD(device_attach, smu_attach),
189 /* Clock interface */
190 DEVMETHOD(clock_gettime, smu_gettime),
191 DEVMETHOD(clock_settime, smu_settime),
193 /* ofw_bus interface */
194 DEVMETHOD(bus_child_pnpinfo_str,ofw_bus_gen_child_pnpinfo_str),
195 DEVMETHOD(ofw_bus_get_devinfo, smu_get_devinfo),
196 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
197 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
198 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
199 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
200 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
205 static driver_t smu_driver = {
208 sizeof(struct smu_softc)
211 static devclass_t smu_devclass;
213 DRIVER_MODULE(smu, ofwbus, smu_driver, smu_devclass, 0, 0);
214 static MALLOC_DEFINE(M_SMU, "smu", "SMU Sensor Information");
216 #define SMU_MAILBOX 0x8000860c
217 #define SMU_FANMGT_INTERVAL 1000 /* ms */
222 #define SMU_RPM_STATUS 0x01
223 #define SMU_RPM_SETPOINT 0x02
224 #define SMU_PWM_STATUS 0x11
225 #define SMU_PWM_SETPOINT 0x12
227 #define SMU_I2C_SIMPLE 0x00
228 #define SMU_I2C_NORMAL 0x01
229 #define SMU_I2C_COMBINED 0x02
230 #define SMU_MISC 0xee
231 #define SMU_MISC_GET_DATA 0x02
232 #define SMU_MISC_LED_CTRL 0x04
233 #define SMU_POWER 0xaa
234 #define SMU_POWER_EVENTS 0x8f
235 #define SMU_PWR_GET_POWERUP 0x00
236 #define SMU_PWR_SET_POWERUP 0x01
237 #define SMU_PWR_CLR_POWERUP 0x02
239 #define SMU_RTC_GET 0x81
240 #define SMU_RTC_SET 0x80
242 /* Power event types */
243 #define SMU_WAKEUP_KEYPRESS 0x01
244 #define SMU_WAKEUP_AC_INSERT 0x02
245 #define SMU_WAKEUP_AC_CHANGE 0x04
246 #define SMU_WAKEUP_RING 0x10
249 #define SMU_CPUTEMP_CAL 0x18
250 #define SMU_CPUVOLT_CAL 0x21
251 #define SMU_SLOTPW_CAL 0x78
254 #define SMU_PARTITION 0x3e
255 #define SMU_PARTITION_LATEST 0x01
256 #define SMU_PARTITION_BASE 0x02
257 #define SMU_PARTITION_UPDATE 0x03
260 smu_probe(device_t dev)
262 const char *name = ofw_bus_get_name(dev);
264 if (strcmp(name, "smu") != 0)
267 device_set_desc(dev, "Apple System Management Unit");
272 smu_phys_callback(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
274 struct smu_softc *sc = xsc;
276 sc->sc_cmd_phys = segs[0].ds_addr;
280 smu_attach(device_t dev)
282 struct smu_softc *sc;
283 phandle_t node, child;
286 sc = device_get_softc(dev);
288 mtx_init(&sc->sc_mtx, "smu", NULL, MTX_DEF);
289 sc->sc_cur_cmd = NULL;
290 sc->sc_doorbellirqid = -1;
293 if (OF_finddevice("/u3") != -1)
297 * Map the mailbox area. This should be determined from firmware,
298 * but I have not found a simple way to do that.
300 bus_dma_tag_create(NULL, 16, 0, BUS_SPACE_MAXADDR_32BIT,
301 BUS_SPACE_MAXADDR, NULL, NULL, PAGE_SIZE, 1, PAGE_SIZE, 0, NULL,
302 NULL, &(sc->sc_dmatag));
303 sc->sc_bt = &bs_le_tag;
304 bus_space_map(sc->sc_bt, SMU_MAILBOX, 4, 0, &sc->sc_mailbox);
307 * Allocate the command buffer. This can be anywhere in the low 4 GB
310 bus_dmamem_alloc(sc->sc_dmatag, (void **)&sc->sc_cmd, BUS_DMA_WAITOK |
311 BUS_DMA_ZERO, &sc->sc_cmd_dmamap);
312 bus_dmamap_load(sc->sc_dmatag, sc->sc_cmd_dmamap,
313 sc->sc_cmd, PAGE_SIZE, smu_phys_callback, sc, 0);
314 STAILQ_INIT(&sc->sc_cmdq);
317 * Set up handlers to change CPU voltage when CPU frequency is changed.
319 EVENTHANDLER_REGISTER(cpufreq_pre_change, smu_cpufreq_pre_change, dev,
320 EVENTHANDLER_PRI_ANY);
321 EVENTHANDLER_REGISTER(cpufreq_post_change, smu_cpufreq_post_change, dev,
322 EVENTHANDLER_PRI_ANY);
324 node = ofw_bus_get_node(dev);
326 /* Some SMUs have RPM and PWM controlled fans which do not sit
327 * under the same node. So we have to attach them separately.
329 smu_attach_fans(dev, node);
332 * Now detect and attach the other child devices.
334 for (child = OF_child(node); child != 0; child = OF_peer(child)) {
336 memset(name, 0, sizeof(name));
337 OF_getprop(child, "name", name, sizeof(name));
339 if (strncmp(name, "sensors", 8) == 0)
340 smu_attach_sensors(dev, child);
342 if (strncmp(name, "smu-i2c-control", 15) == 0)
343 smu_attach_i2c(dev, child);
346 /* Some SMUs have the I2C children directly under the bus. */
347 smu_attach_i2c(dev, node);
350 * Collect calibration constants.
352 smu_get_datablock(dev, SMU_CPUTEMP_CAL, data, sizeof(data));
353 sc->sc_cpu_diode_scale = (data[4] << 8) + data[5];
354 sc->sc_cpu_diode_offset = (data[6] << 8) + data[7];
356 smu_get_datablock(dev, SMU_CPUVOLT_CAL, data, sizeof(data));
357 sc->sc_cpu_volt_scale = (data[4] << 8) + data[5];
358 sc->sc_cpu_volt_offset = (data[6] << 8) + data[7];
359 sc->sc_cpu_curr_scale = (data[8] << 8) + data[9];
360 sc->sc_cpu_curr_offset = (data[10] << 8) + data[11];
362 smu_get_datablock(dev, SMU_SLOTPW_CAL, data, sizeof(data));
363 sc->sc_slots_pow_scale = (data[4] << 8) + data[5];
364 sc->sc_slots_pow_offset = (data[6] << 8) + data[7];
367 * Set up LED interface
369 sc->sc_leddev = led_create(smu_set_sleepled, dev, "sleepled");
372 * Reset on power loss behavior
375 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
376 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
377 "server_mode", CTLTYPE_INT | CTLFLAG_RW, dev, 0,
378 smu_server_mode, "I", "Enable reboot after power failure");
381 * Set up doorbell interrupt.
383 sc->sc_doorbellirqid = 0;
384 sc->sc_doorbellirq = bus_alloc_resource_any(smu_doorbell, SYS_RES_IRQ,
385 &sc->sc_doorbellirqid, RF_ACTIVE);
386 bus_setup_intr(smu_doorbell, sc->sc_doorbellirq,
387 INTR_TYPE_MISC | INTR_MPSAFE, NULL, smu_doorbell_intr, dev,
388 &sc->sc_doorbellirqcookie);
389 powerpc_config_intr(rman_get_start(sc->sc_doorbellirq),
390 INTR_TRIGGER_EDGE, INTR_POLARITY_LOW);
393 * Connect RTC interface.
395 clock_register(dev, 1000);
398 * Learn about shutdown events
400 EVENTHANDLER_REGISTER(shutdown_final, smu_shutdown, dev,
403 return (bus_generic_attach(dev));
406 static const struct ofw_bus_devinfo *
407 smu_get_devinfo(device_t bus, device_t dev)
410 return (device_get_ivars(dev));
414 smu_send_cmd(device_t dev, struct smu_cmd *cmd)
416 struct smu_softc *sc;
418 sc = device_get_softc(dev);
420 mtx_assert(&sc->sc_mtx, MA_OWNED);
423 powerpc_pow_enabled = 0; /* SMU cannot work if we go to NAP */
425 sc->sc_cur_cmd = cmd;
427 /* Copy the command to the mailbox */
428 sc->sc_cmd->cmd = cmd->cmd;
429 sc->sc_cmd->len = cmd->len;
430 memcpy(sc->sc_cmd->data, cmd->data, sizeof(cmd->data));
431 bus_dmamap_sync(sc->sc_dmatag, sc->sc_cmd_dmamap, BUS_DMASYNC_PREWRITE);
432 bus_space_write_4(sc->sc_bt, sc->sc_mailbox, 0, sc->sc_cmd_phys);
434 /* Flush the cacheline it is in -- SMU bypasses the cache */
435 __asm __volatile("sync; dcbf 0,%0; sync" :: "r"(sc->sc_cmd): "memory");
437 /* Ring SMU doorbell */
438 macgpio_write(smu_doorbell, GPIO_DDR_OUTPUT);
442 smu_doorbell_intr(void *xdev)
445 struct smu_softc *sc;
449 doorbell_ack = macgpio_read(smu_doorbell);
450 sc = device_get_softc(smu);
452 if (doorbell_ack != (GPIO_DDR_OUTPUT | GPIO_LEVEL_RO | GPIO_DATA))
455 mtx_lock(&sc->sc_mtx);
457 if (sc->sc_cur_cmd == NULL) /* spurious */
460 /* Check result. First invalidate the cache again... */
461 __asm __volatile("dcbf 0,%0; sync" :: "r"(sc->sc_cmd) : "memory");
463 bus_dmamap_sync(sc->sc_dmatag, sc->sc_cmd_dmamap, BUS_DMASYNC_POSTREAD);
465 sc->sc_cur_cmd->cmd = sc->sc_cmd->cmd;
466 sc->sc_cur_cmd->len = sc->sc_cmd->len;
467 memcpy(sc->sc_cur_cmd->data, sc->sc_cmd->data,
468 sizeof(sc->sc_cmd->data));
469 wakeup(sc->sc_cur_cmd);
470 sc->sc_cur_cmd = NULL;
472 powerpc_pow_enabled = 1;
475 /* Queue next command if one is pending */
476 if (STAILQ_FIRST(&sc->sc_cmdq) != NULL) {
477 sc->sc_cur_cmd = STAILQ_FIRST(&sc->sc_cmdq);
478 STAILQ_REMOVE_HEAD(&sc->sc_cmdq, cmd_q);
479 smu_send_cmd(smu, sc->sc_cur_cmd);
482 mtx_unlock(&sc->sc_mtx);
486 smu_run_cmd(device_t dev, struct smu_cmd *cmd, int wait)
488 struct smu_softc *sc;
492 sc = device_get_softc(dev);
495 mtx_lock(&sc->sc_mtx);
496 if (sc->sc_cur_cmd != NULL) {
497 STAILQ_INSERT_TAIL(&sc->sc_cmdq, cmd, cmd_q);
499 smu_send_cmd(dev, cmd);
500 mtx_unlock(&sc->sc_mtx);
505 if (sc->sc_doorbellirqid < 0) {
506 /* Poll if the IRQ has not been set up yet */
509 smu_doorbell_intr(dev);
510 } while (sc->sc_cur_cmd != NULL);
512 /* smu_doorbell_intr will wake us when the command is ACK'ed */
513 error = tsleep(cmd, 0, "smu", 800 * hz / 1000);
515 smu_doorbell_intr(dev); /* One last chance */
518 mtx_lock(&sc->sc_mtx);
519 if (cmd->cmd == cmd_code) { /* Never processed */
520 /* Abort this command if we timed out */
521 if (sc->sc_cur_cmd == cmd)
522 sc->sc_cur_cmd = NULL;
524 STAILQ_REMOVE(&sc->sc_cmdq, cmd, smu_cmd,
526 mtx_unlock(&sc->sc_mtx);
530 mtx_unlock(&sc->sc_mtx);
534 /* SMU acks the command by inverting the command bits */
535 if (cmd->cmd == ((~cmd_code) & 0xff))
544 smu_get_datablock(device_t dev, int8_t id, uint8_t *buf, size_t len)
549 cmd.cmd = SMU_PARTITION;
551 cmd.data[0] = SMU_PARTITION_LATEST;
554 smu_run_cmd(dev, &cmd, 1);
556 addr[0] = addr[1] = 0;
557 addr[2] = cmd.data[0];
558 addr[3] = cmd.data[1];
562 cmd.data[0] = SMU_MISC_GET_DATA;
563 cmd.data[1] = sizeof(addr);
564 memcpy(&cmd.data[2], addr, sizeof(addr));
567 smu_run_cmd(dev, &cmd, 1);
568 memcpy(buf, cmd.data, len);
573 smu_slew_cpu_voltage(device_t dev, int to)
588 smu_run_cmd(dev, &cmd, 1);
592 smu_cpufreq_pre_change(device_t dev, const struct cf_level *level)
595 * Make sure the CPU voltage is raised before we raise
599 if (level->rel_set[0].freq == 10000 /* max */)
600 smu_slew_cpu_voltage(dev, 0);
604 smu_cpufreq_post_change(device_t dev, const struct cf_level *level)
606 /* We are safe to reduce CPU voltage after a downward transition */
608 if (level->rel_set[0].freq < 10000 /* max */)
609 smu_slew_cpu_voltage(dev, 1); /* XXX: 1/4 voltage for 970MP? */
612 /* Routines for probing the SMU doorbell GPIO */
613 static int doorbell_probe(device_t dev);
614 static int doorbell_attach(device_t dev);
616 static device_method_t doorbell_methods[] = {
617 /* Device interface */
618 DEVMETHOD(device_probe, doorbell_probe),
619 DEVMETHOD(device_attach, doorbell_attach),
623 static driver_t doorbell_driver = {
629 static devclass_t doorbell_devclass;
631 DRIVER_MODULE(smudoorbell, macgpio, doorbell_driver, doorbell_devclass, 0, 0);
634 doorbell_probe(device_t dev)
636 const char *name = ofw_bus_get_name(dev);
638 if (strcmp(name, "smu-doorbell") != 0)
641 device_set_desc(dev, "SMU Doorbell GPIO");
647 doorbell_attach(device_t dev)
654 * Sensor and fan management
658 smu_fan_check_old_style(struct smu_fan *fan)
660 device_t smu = fan->dev;
661 struct smu_softc *sc = device_get_softc(smu);
665 if (sc->old_style_fans != -1)
666 return (sc->old_style_fans);
669 * Apple has two fan control mechanisms. We can't distinguish
670 * them except by seeing if the new one fails. If the new one
671 * fails, use the old one.
677 cmd.data[1] = fan->reg;
680 error = smu_run_cmd(smu, &cmd, 1);
681 } while (error == EWOULDBLOCK);
683 sc->old_style_fans = (error != 0);
685 return (sc->old_style_fans);
689 smu_fan_set_rpm(struct smu_fan *fan, int rpm)
691 device_t smu = fan->dev;
698 /* Clamp to allowed range */
699 rpm = max(fan->fan.min_rpm, rpm);
700 rpm = min(fan->fan.max_rpm, rpm);
702 smu_fan_check_old_style(fan);
704 if (!fan->old_style) {
707 cmd.data[1] = fan->reg;
708 cmd.data[2] = (rpm >> 8) & 0xff;
709 cmd.data[3] = rpm & 0xff;
711 error = smu_run_cmd(smu, &cmd, 1);
712 if (error && error != EWOULDBLOCK)
716 cmd.data[0] = 0x00; /* RPM fan. */
717 cmd.data[1] = 1 << fan->reg;
718 cmd.data[2 + 2*fan->reg] = (rpm >> 8) & 0xff;
719 cmd.data[3 + 2*fan->reg] = rpm & 0xff;
720 error = smu_run_cmd(smu, &cmd, 1);
730 smu_fan_read_rpm(struct smu_fan *fan)
732 device_t smu = fan->dev;
736 smu_fan_check_old_style(fan);
738 if (!fan->old_style) {
742 cmd.data[1] = fan->reg;
744 error = smu_run_cmd(smu, &cmd, 1);
745 if (error && error != EWOULDBLOCK)
748 rpm = (cmd.data[0] << 8) | cmd.data[1];
751 if (fan->old_style) {
754 cmd.data[0] = SMU_RPM_STATUS;
756 error = smu_run_cmd(smu, &cmd, 1);
760 rpm = (cmd.data[fan->reg*2+1] << 8) | cmd.data[fan->reg*2+2];
766 smu_fan_set_pwm(struct smu_fan *fan, int pwm)
768 device_t smu = fan->dev;
775 /* Clamp to allowed range */
776 pwm = max(fan->fan.min_rpm, pwm);
777 pwm = min(fan->fan.max_rpm, pwm);
780 * Apple has two fan control mechanisms. We can't distinguish
781 * them except by seeing if the new one fails. If the new one
782 * fails, use the old one.
785 if (!fan->old_style) {
788 cmd.data[1] = fan->reg;
789 cmd.data[2] = (pwm >> 8) & 0xff;
790 cmd.data[3] = pwm & 0xff;
792 error = smu_run_cmd(smu, &cmd, 1);
793 if (error && error != EWOULDBLOCK)
797 if (fan->old_style) {
799 cmd.data[0] = 0x10; /* PWM fan. */
800 cmd.data[1] = 1 << fan->reg;
801 cmd.data[2 + 2*fan->reg] = (pwm >> 8) & 0xff;
802 cmd.data[3 + 2*fan->reg] = pwm & 0xff;
803 error = smu_run_cmd(smu, &cmd, 1);
813 smu_fan_read_pwm(struct smu_fan *fan, int *pwm, int *rpm)
815 device_t smu = fan->dev;
819 if (!fan->old_style) {
823 cmd.data[1] = fan->reg;
825 error = smu_run_cmd(smu, &cmd, 1);
826 if (error && error != EWOULDBLOCK)
829 *rpm = (cmd.data[0] << 8) | cmd.data[1];
832 if (fan->old_style) {
835 cmd.data[0] = SMU_PWM_STATUS;
837 error = smu_run_cmd(smu, &cmd, 1);
841 *rpm = (cmd.data[fan->reg*2+1] << 8) | cmd.data[fan->reg*2+2];
843 if (fan->old_style) {
846 cmd.data[0] = SMU_PWM_SETPOINT;
847 cmd.data[1] = 1 << fan->reg;
849 error = smu_run_cmd(smu, &cmd, 1);
853 *pwm = cmd.data[fan->reg*2+2];
859 smu_fanrpm_sysctl(SYSCTL_HANDLER_ARGS)
862 struct smu_softc *sc;
864 int pwm = 0, rpm, error = 0;
867 sc = device_get_softc(smu);
868 fan = &sc->sc_fans[arg2 & 0xff];
870 if (fan->type == SMU_FAN_RPM) {
871 rpm = smu_fan_read_rpm(fan);
875 error = sysctl_handle_int(oidp, &rpm, 0, req);
877 error = smu_fan_read_pwm(fan, &pwm, &rpm);
881 switch (arg2 & 0xff00) {
882 case SMU_PWM_SYSCTL_PWM:
883 error = sysctl_handle_int(oidp, &pwm, 0, req);
885 case SMU_PWM_SYSCTL_RPM:
886 error = sysctl_handle_int(oidp, &rpm, 0, req);
889 /* This should never happen */
893 /* We can only read the RPM from a PWM controlled fan, so return. */
894 if ((arg2 & 0xff00) == SMU_PWM_SYSCTL_RPM)
897 if (error || !req->newptr)
900 sc->sc_lastuserchange = time_uptime;
902 if (fan->type == SMU_FAN_RPM)
903 return (smu_fan_set_rpm(fan, rpm));
905 return (smu_fan_set_pwm(fan, pwm));
909 smu_fill_fan_prop(device_t dev, phandle_t child, int id)
912 struct smu_softc *sc;
915 sc = device_get_softc(dev);
916 fan = &sc->sc_fans[id];
918 OF_getprop(child, "device_type", type, sizeof(type));
919 /* We have either RPM or PWM controlled fans. */
920 if (strcmp(type, "fan-rpm-control") == 0)
921 fan->type = SMU_FAN_RPM;
923 fan->type = SMU_FAN_PWM;
927 OF_getprop(child, "reg", &fan->reg,
929 OF_getprop(child, "min-value", &fan->fan.min_rpm,
931 OF_getprop(child, "max-value", &fan->fan.max_rpm,
933 OF_getprop(child, "zone", &fan->fan.zone,
936 if (OF_getprop(child, "unmanaged-value",
937 &fan->fan.default_rpm,
938 sizeof(int)) != sizeof(int))
939 fan->fan.default_rpm = fan->fan.max_rpm;
941 OF_getprop(child, "location", fan->fan.name,
942 sizeof(fan->fan.name));
944 if (fan->type == SMU_FAN_RPM)
945 fan->setpoint = smu_fan_read_rpm(fan);
947 smu_fan_read_pwm(fan, &fan->setpoint, &fan->rpm);
950 /* On the first call count the number of fans. In the second call,
951 * after allocating the fan struct, fill the properties of the fans.
954 smu_count_fans(device_t dev)
956 struct smu_softc *sc;
957 phandle_t child, node, root;
960 node = ofw_bus_get_node(dev);
961 sc = device_get_softc(dev);
963 /* First find the fanroots and count the number of fans. */
964 for (root = OF_child(node); root != 0; root = OF_peer(root)) {
966 memset(name, 0, sizeof(name));
967 OF_getprop(root, "name", name, sizeof(name));
968 if (strncmp(name, "rpm-fans", 9) == 0 ||
969 strncmp(name, "pwm-fans", 9) == 0 ||
970 strncmp(name, "fans", 5) == 0)
971 for (child = OF_child(root); child != 0;
972 child = OF_peer(child)) {
974 /* When allocated, fill the fan properties. */
975 if (sc->sc_fans != NULL) {
976 smu_fill_fan_prop(dev, child,
982 device_printf(dev, "WARNING: No fans detected!\n");
989 smu_attach_fans(device_t dev, phandle_t fanroot)
992 struct smu_softc *sc;
993 struct sysctl_oid *oid, *fanroot_oid;
994 struct sysctl_ctx_list *ctx;
995 char sysctl_name[32];
998 sc = device_get_softc(dev);
1000 /* Get the number of fans. */
1001 sc->sc_nfans = smu_count_fans(dev);
1002 if (sc->sc_nfans == 0)
1005 /* Now we're able to allocate memory for the fans struct. */
1006 sc->sc_fans = malloc(sc->sc_nfans * sizeof(struct smu_fan), M_SMU,
1009 /* Now fill in the properties. */
1010 smu_count_fans(dev);
1012 /* Register fans with pmac_thermal */
1013 for (i = 0; i < sc->sc_nfans; i++)
1014 pmac_thermal_fan_register(&sc->sc_fans[i].fan);
1016 ctx = device_get_sysctl_ctx(dev);
1017 fanroot_oid = SYSCTL_ADD_NODE(ctx,
1018 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "fans",
1019 CTLFLAG_RD, 0, "SMU Fan Information");
1022 for (i = 0; i < sc->sc_nfans; i++) {
1023 fan = &sc->sc_fans[i];
1024 for (j = 0; j < strlen(fan->fan.name); j++) {
1025 sysctl_name[j] = tolower(fan->fan.name[j]);
1026 if (isspace(sysctl_name[j]))
1027 sysctl_name[j] = '_';
1030 if (fan->type == SMU_FAN_RPM) {
1031 oid = SYSCTL_ADD_NODE(ctx,
1032 SYSCTL_CHILDREN(fanroot_oid),
1033 OID_AUTO, sysctl_name,
1034 CTLFLAG_RD, 0, "Fan Information");
1035 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
1036 "minrpm", CTLTYPE_INT | CTLFLAG_RD,
1037 &fan->fan.min_rpm, sizeof(int),
1038 "Minimum allowed RPM");
1039 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
1040 "maxrpm", CTLTYPE_INT | CTLFLAG_RD,
1041 &fan->fan.max_rpm, sizeof(int),
1042 "Maximum allowed RPM");
1043 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
1044 "rpm",CTLTYPE_INT | CTLFLAG_RW |
1045 CTLFLAG_MPSAFE, dev, i,
1046 smu_fanrpm_sysctl, "I", "Fan RPM");
1048 fan->fan.read = (int (*)(struct pmac_fan *))smu_fan_read_rpm;
1049 fan->fan.set = (int (*)(struct pmac_fan *, int))smu_fan_set_rpm;
1052 oid = SYSCTL_ADD_NODE(ctx,
1053 SYSCTL_CHILDREN(fanroot_oid),
1054 OID_AUTO, sysctl_name,
1055 CTLFLAG_RD, 0, "Fan Information");
1056 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
1057 "minpwm", CTLTYPE_INT | CTLFLAG_RD,
1058 &fan->fan.min_rpm, sizeof(int),
1059 "Minimum allowed PWM in %");
1060 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
1061 "maxpwm", CTLTYPE_INT | CTLFLAG_RD,
1062 &fan->fan.max_rpm, sizeof(int),
1063 "Maximum allowed PWM in %");
1064 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
1065 "pwm",CTLTYPE_INT | CTLFLAG_RW |
1066 CTLFLAG_MPSAFE, dev,
1067 SMU_PWM_SYSCTL_PWM | i,
1068 smu_fanrpm_sysctl, "I", "Fan PWM in %");
1069 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
1070 "rpm",CTLTYPE_INT | CTLFLAG_RD |
1071 CTLFLAG_MPSAFE, dev,
1072 SMU_PWM_SYSCTL_RPM | i,
1073 smu_fanrpm_sysctl, "I", "Fan RPM");
1074 fan->fan.read = NULL;
1075 fan->fan.set = (int (*)(struct pmac_fan *, int))smu_fan_set_pwm;
1079 device_printf(dev, "Fan: %s type: %d\n",
1080 fan->fan.name, fan->type);
1085 smu_sensor_read(struct smu_sensor *sens)
1087 device_t smu = sens->dev;
1089 struct smu_softc *sc;
1095 cmd.data[0] = sens->reg;
1098 error = smu_run_cmd(smu, &cmd, 1);
1102 sc = device_get_softc(smu);
1103 value = (cmd.data[0] << 8) | cmd.data[1];
1105 switch (sens->type) {
1106 case SMU_TEMP_SENSOR:
1107 value *= sc->sc_cpu_diode_scale;
1109 value += ((int64_t)sc->sc_cpu_diode_offset) << 9;
1112 /* Convert from 16.16 fixed point degC into integer 0.1 K. */
1113 value = 10*(value >> 16) + ((10*(value & 0xffff)) >> 16) + 2732;
1115 case SMU_VOLTAGE_SENSOR:
1116 value *= sc->sc_cpu_volt_scale;
1117 value += sc->sc_cpu_volt_offset;
1120 /* Convert from 16.16 fixed point V into mV. */
1125 case SMU_CURRENT_SENSOR:
1126 value *= sc->sc_cpu_curr_scale;
1127 value += sc->sc_cpu_curr_offset;
1130 /* Convert from 16.16 fixed point A into mA. */
1135 case SMU_POWER_SENSOR:
1136 value *= sc->sc_slots_pow_scale;
1137 value += sc->sc_slots_pow_offset;
1140 /* Convert from 16.16 fixed point W into mW. */
1151 smu_sensor_sysctl(SYSCTL_HANDLER_ARGS)
1154 struct smu_softc *sc;
1155 struct smu_sensor *sens;
1159 sc = device_get_softc(smu);
1160 sens = &sc->sc_sensors[arg2];
1162 value = smu_sensor_read(sens);
1166 error = sysctl_handle_int(oidp, &value, 0, req);
1172 smu_attach_sensors(device_t dev, phandle_t sensroot)
1174 struct smu_sensor *sens;
1175 struct smu_softc *sc;
1176 struct sysctl_oid *sensroot_oid;
1177 struct sysctl_ctx_list *ctx;
1182 sc = device_get_softc(dev);
1183 sc->sc_nsensors = 0;
1185 for (child = OF_child(sensroot); child != 0; child = OF_peer(child))
1188 if (sc->sc_nsensors == 0) {
1189 device_printf(dev, "WARNING: No sensors detected!\n");
1193 sc->sc_sensors = malloc(sc->sc_nsensors * sizeof(struct smu_sensor),
1194 M_SMU, M_WAITOK | M_ZERO);
1196 sens = sc->sc_sensors;
1197 sc->sc_nsensors = 0;
1199 ctx = device_get_sysctl_ctx(dev);
1200 sensroot_oid = SYSCTL_ADD_NODE(ctx,
1201 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "sensors",
1202 CTLFLAG_RD, 0, "SMU Sensor Information");
1204 for (child = OF_child(sensroot); child != 0; child = OF_peer(child)) {
1205 char sysctl_name[40], sysctl_desc[40];
1209 OF_getprop(child, "device_type", type, sizeof(type));
1211 if (strcmp(type, "current-sensor") == 0) {
1212 sens->type = SMU_CURRENT_SENSOR;
1214 } else if (strcmp(type, "temp-sensor") == 0) {
1215 sens->type = SMU_TEMP_SENSOR;
1217 } else if (strcmp(type, "voltage-sensor") == 0) {
1218 sens->type = SMU_VOLTAGE_SENSOR;
1220 } else if (strcmp(type, "power-sensor") == 0) {
1221 sens->type = SMU_POWER_SENSOR;
1227 OF_getprop(child, "reg", &sens->reg, sizeof(cell_t));
1228 OF_getprop(child, "zone", &sens->therm.zone, sizeof(int));
1229 OF_getprop(child, "location", sens->therm.name,
1230 sizeof(sens->therm.name));
1232 for (i = 0; i < strlen(sens->therm.name); i++) {
1233 sysctl_name[i] = tolower(sens->therm.name[i]);
1234 if (isspace(sysctl_name[i]))
1235 sysctl_name[i] = '_';
1239 sprintf(sysctl_desc,"%s (%s)", sens->therm.name, units);
1241 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(sensroot_oid), OID_AUTO,
1242 sysctl_name, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
1243 dev, sc->sc_nsensors, smu_sensor_sysctl,
1244 (sens->type == SMU_TEMP_SENSOR) ? "IK" : "I", sysctl_desc);
1246 if (sens->type == SMU_TEMP_SENSOR) {
1247 /* Make up some numbers */
1248 sens->therm.target_temp = 500 + 2732; /* 50 C */
1249 sens->therm.max_temp = 900 + 2732; /* 90 C */
1252 (int (*)(struct pmac_therm *))smu_sensor_read;
1253 pmac_thermal_sensor_register(&sens->therm);
1262 smu_set_sleepled(void *xdev, int onoff)
1264 static struct smu_cmd cmd;
1265 device_t smu = xdev;
1269 cmd.data[0] = SMU_MISC_LED_CTRL;
1271 cmd.data[2] = onoff;
1273 smu_run_cmd(smu, &cmd, 0);
1277 smu_server_mode(SYSCTL_HANDLER_ARGS)
1281 device_t smu = arg1;
1284 cmd.cmd = SMU_POWER_EVENTS;
1286 cmd.data[0] = SMU_PWR_GET_POWERUP;
1288 error = smu_run_cmd(smu, &cmd, 1);
1293 server_mode = (cmd.data[1] & SMU_WAKEUP_AC_INSERT) ? 1 : 0;
1295 error = sysctl_handle_int(oidp, &server_mode, 0, req);
1297 if (error || !req->newptr)
1300 if (server_mode == 1)
1301 cmd.data[0] = SMU_PWR_SET_POWERUP;
1302 else if (server_mode == 0)
1303 cmd.data[0] = SMU_PWR_CLR_POWERUP;
1309 cmd.data[2] = SMU_WAKEUP_AC_INSERT;
1311 return (smu_run_cmd(smu, &cmd, 1));
1315 smu_shutdown(void *xdev, int howto)
1317 device_t smu = xdev;
1320 cmd.cmd = SMU_POWER;
1321 if (howto & RB_HALT)
1322 strcpy(cmd.data, "SHUTDOWN");
1324 strcpy(cmd.data, "RESTART");
1326 cmd.len = strlen(cmd.data);
1328 smu_run_cmd(smu, &cmd, 1);
1334 smu_gettime(device_t dev, struct timespec *ts)
1337 struct clocktime ct;
1341 cmd.data[0] = SMU_RTC_GET;
1343 if (smu_run_cmd(dev, &cmd, 1) != 0)
1347 ct.sec = bcd2bin(cmd.data[0]);
1348 ct.min = bcd2bin(cmd.data[1]);
1349 ct.hour = bcd2bin(cmd.data[2]);
1350 ct.dow = bcd2bin(cmd.data[3]);
1351 ct.day = bcd2bin(cmd.data[4]);
1352 ct.mon = bcd2bin(cmd.data[5]);
1353 ct.year = bcd2bin(cmd.data[6]) + 2000;
1355 return (clock_ct_to_ts(&ct, ts));
1359 smu_settime(device_t dev, struct timespec *ts)
1361 static struct smu_cmd cmd;
1362 struct clocktime ct;
1366 cmd.data[0] = SMU_RTC_SET;
1368 clock_ts_to_ct(ts, &ct);
1370 cmd.data[1] = bin2bcd(ct.sec);
1371 cmd.data[2] = bin2bcd(ct.min);
1372 cmd.data[3] = bin2bcd(ct.hour);
1373 cmd.data[4] = bin2bcd(ct.dow);
1374 cmd.data[5] = bin2bcd(ct.day);
1375 cmd.data[6] = bin2bcd(ct.mon);
1376 cmd.data[7] = bin2bcd(ct.year - 2000);
1378 return (smu_run_cmd(dev, &cmd, 0));
1381 /* SMU I2C Interface */
1383 static int smuiic_probe(device_t dev);
1384 static int smuiic_attach(device_t dev);
1385 static int smuiic_transfer(device_t dev, struct iic_msg *msgs, uint32_t nmsgs);
1386 static phandle_t smuiic_get_node(device_t bus, device_t dev);
1388 static device_method_t smuiic_methods[] = {
1389 /* device interface */
1390 DEVMETHOD(device_probe, smuiic_probe),
1391 DEVMETHOD(device_attach, smuiic_attach),
1393 /* iicbus interface */
1394 DEVMETHOD(iicbus_callback, iicbus_null_callback),
1395 DEVMETHOD(iicbus_transfer, smuiic_transfer),
1397 /* ofw_bus interface */
1398 DEVMETHOD(ofw_bus_get_node, smuiic_get_node),
1403 struct smuiic_softc {
1405 volatile int sc_iic_inuse;
1409 static driver_t smuiic_driver = {
1412 sizeof(struct smuiic_softc)
1414 static devclass_t smuiic_devclass;
1416 DRIVER_MODULE(smuiic, smu, smuiic_driver, smuiic_devclass, 0, 0);
1419 smu_attach_i2c(device_t smu, phandle_t i2croot)
1423 struct ofw_bus_devinfo *dinfo;
1426 for (child = OF_child(i2croot); child != 0; child = OF_peer(child)) {
1427 if (OF_getprop(child, "name", name, sizeof(name)) <= 0)
1430 if (strcmp(name, "i2c-bus") != 0 && strcmp(name, "i2c") != 0)
1433 dinfo = malloc(sizeof(struct ofw_bus_devinfo), M_SMU,
1435 if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) {
1440 cdev = device_add_child(smu, NULL, -1);
1442 device_printf(smu, "<%s>: device_add_child failed\n",
1444 ofw_bus_gen_destroy_devinfo(dinfo);
1448 device_set_ivars(cdev, dinfo);
1453 smuiic_probe(device_t dev)
1457 name = ofw_bus_get_name(dev);
1461 if (strcmp(name, "i2c-bus") == 0 || strcmp(name, "i2c") == 0) {
1462 device_set_desc(dev, "SMU I2C controller");
1470 smuiic_attach(device_t dev)
1472 struct smuiic_softc *sc = device_get_softc(dev);
1473 mtx_init(&sc->sc_mtx, "smuiic", NULL, MTX_DEF);
1474 sc->sc_iic_inuse = 0;
1476 /* Get our bus number */
1477 OF_getprop(ofw_bus_get_node(dev), "reg", &sc->sc_busno,
1478 sizeof(sc->sc_busno));
1480 /* Add the IIC bus layer */
1481 device_add_child(dev, "iicbus", -1);
1483 return (bus_generic_attach(dev));
1487 smuiic_transfer(device_t dev, struct iic_msg *msgs, uint32_t nmsgs)
1489 struct smuiic_softc *sc = device_get_softc(dev);
1493 mtx_lock(&sc->sc_mtx);
1494 while (sc->sc_iic_inuse)
1495 mtx_sleep(sc, &sc->sc_mtx, 0, "smuiic", 100);
1497 sc->sc_iic_inuse = 1;
1500 for (i = 0; i < nmsgs; i++) {
1502 cmd.data[0] = sc->sc_busno;
1503 if (msgs[i].flags & IIC_M_NOSTOP)
1504 cmd.data[1] = SMU_I2C_COMBINED;
1506 cmd.data[1] = SMU_I2C_SIMPLE;
1508 cmd.data[2] = msgs[i].slave;
1509 if (msgs[i].flags & IIC_M_RD)
1512 if (msgs[i].flags & IIC_M_NOSTOP) {
1513 KASSERT(msgs[i].len < 4,
1514 ("oversize I2C combined message"));
1516 cmd.data[3] = min(msgs[i].len, 3);
1517 memcpy(&cmd.data[4], msgs[i].buf, min(msgs[i].len, 3));
1518 i++; /* Advance to next part of message */
1521 memset(&cmd.data[4], 0, 3);
1524 cmd.data[7] = msgs[i].slave;
1525 if (msgs[i].flags & IIC_M_RD)
1528 cmd.data[8] = msgs[i].len;
1529 if (msgs[i].flags & IIC_M_RD) {
1530 memset(&cmd.data[9], 0xff, msgs[i].len);
1533 memcpy(&cmd.data[9], msgs[i].buf, msgs[i].len);
1534 cmd.len = 9 + msgs[i].len;
1537 mtx_unlock(&sc->sc_mtx);
1538 smu_run_cmd(device_get_parent(dev), &cmd, 1);
1539 mtx_lock(&sc->sc_mtx);
1541 for (j = 0; j < 10; j++) {
1545 memset(&cmd.data[1], 0xff, msgs[i].len);
1547 mtx_unlock(&sc->sc_mtx);
1548 smu_run_cmd(device_get_parent(dev), &cmd, 1);
1549 mtx_lock(&sc->sc_mtx);
1551 if (!(cmd.data[0] & 0x80))
1554 mtx_sleep(sc, &sc->sc_mtx, 0, "smuiic", 10);
1557 if (cmd.data[0] & 0x80) {
1562 memcpy(msgs[i].buf, &cmd.data[1], msgs[i].len);
1563 msgs[i].len = cmd.len - 1;
1567 sc->sc_iic_inuse = 0;
1568 mtx_unlock(&sc->sc_mtx);
1574 smuiic_get_node(device_t bus, device_t dev)
1577 return (ofw_bus_get_node(bus));