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);
82 struct pmac_therm therm;
98 struct resource *sc_memr;
102 bus_dma_tag_t sc_dmatag;
103 bus_space_tag_t sc_bt;
104 bus_space_handle_t sc_mailbox;
106 struct smu_cmd *sc_cmd, *sc_cur_cmd;
107 bus_addr_t sc_cmd_phys;
108 bus_dmamap_t sc_cmd_dmamap;
109 struct smu_cmdq sc_cmdq;
111 struct smu_fan *sc_fans;
113 struct smu_sensor *sc_sensors;
116 int sc_doorbellirqid;
117 struct resource *sc_doorbellirq;
118 void *sc_doorbellirqcookie;
120 struct proc *sc_fanmgt_proc;
121 time_t sc_lastuserchange;
123 /* Calibration data */
124 uint16_t sc_cpu_diode_scale;
125 int16_t sc_cpu_diode_offset;
127 uint16_t sc_cpu_volt_scale;
128 int16_t sc_cpu_volt_offset;
129 uint16_t sc_cpu_curr_scale;
130 int16_t sc_cpu_curr_offset;
132 uint16_t sc_slots_pow_scale;
133 int16_t sc_slots_pow_offset;
135 struct cdev *sc_leddev;
138 /* regular bus attachment functions */
140 static int smu_probe(device_t);
141 static int smu_attach(device_t);
142 static const struct ofw_bus_devinfo *
143 smu_get_devinfo(device_t bus, device_t dev);
145 /* cpufreq notification hooks */
147 static void smu_cpufreq_pre_change(device_t, const struct cf_level *level);
148 static void smu_cpufreq_post_change(device_t, const struct cf_level *level);
150 /* clock interface */
151 static int smu_gettime(device_t dev, struct timespec *ts);
152 static int smu_settime(device_t dev, struct timespec *ts);
154 /* utility functions */
155 static int smu_run_cmd(device_t dev, struct smu_cmd *cmd, int wait);
156 static int smu_get_datablock(device_t dev, int8_t id, uint8_t *buf,
158 static void smu_attach_i2c(device_t dev, phandle_t i2croot);
159 static void smu_attach_fans(device_t dev, phandle_t fanroot);
160 static void smu_attach_sensors(device_t dev, phandle_t sensroot);
161 static void smu_set_sleepled(void *xdev, int onoff);
162 static int smu_server_mode(SYSCTL_HANDLER_ARGS);
163 static void smu_doorbell_intr(void *xdev);
164 static void smu_shutdown(void *xdev, int howto);
166 /* where to find the doorbell GPIO */
168 static device_t smu_doorbell = NULL;
170 static device_method_t smu_methods[] = {
171 /* Device interface */
172 DEVMETHOD(device_probe, smu_probe),
173 DEVMETHOD(device_attach, smu_attach),
175 /* Clock interface */
176 DEVMETHOD(clock_gettime, smu_gettime),
177 DEVMETHOD(clock_settime, smu_settime),
179 /* ofw_bus interface */
180 DEVMETHOD(bus_child_pnpinfo_str,ofw_bus_gen_child_pnpinfo_str),
181 DEVMETHOD(ofw_bus_get_devinfo, smu_get_devinfo),
182 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
183 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
184 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
185 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
186 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
191 static driver_t smu_driver = {
194 sizeof(struct smu_softc)
197 static devclass_t smu_devclass;
199 DRIVER_MODULE(smu, nexus, smu_driver, smu_devclass, 0, 0);
200 MALLOC_DEFINE(M_SMU, "smu", "SMU Sensor Information");
202 #define SMU_MAILBOX 0x8000860c
203 #define SMU_FANMGT_INTERVAL 1000 /* ms */
209 #define SMU_I2C_SIMPLE 0x00
210 #define SMU_I2C_NORMAL 0x01
211 #define SMU_I2C_COMBINED 0x02
212 #define SMU_MISC 0xee
213 #define SMU_MISC_GET_DATA 0x02
214 #define SMU_MISC_LED_CTRL 0x04
215 #define SMU_POWER 0xaa
216 #define SMU_POWER_EVENTS 0x8f
217 #define SMU_PWR_GET_POWERUP 0x00
218 #define SMU_PWR_SET_POWERUP 0x01
219 #define SMU_PWR_CLR_POWERUP 0x02
221 #define SMU_RTC_GET 0x81
222 #define SMU_RTC_SET 0x80
224 /* Power event types */
225 #define SMU_WAKEUP_KEYPRESS 0x01
226 #define SMU_WAKEUP_AC_INSERT 0x02
227 #define SMU_WAKEUP_AC_CHANGE 0x04
228 #define SMU_WAKEUP_RING 0x10
231 #define SMU_CPUTEMP_CAL 0x18
232 #define SMU_CPUVOLT_CAL 0x21
233 #define SMU_SLOTPW_CAL 0x78
236 #define SMU_PARTITION 0x3e
237 #define SMU_PARTITION_LATEST 0x01
238 #define SMU_PARTITION_BASE 0x02
239 #define SMU_PARTITION_UPDATE 0x03
242 smu_probe(device_t dev)
244 const char *name = ofw_bus_get_name(dev);
246 if (strcmp(name, "smu") != 0)
249 device_set_desc(dev, "Apple System Management Unit");
254 smu_phys_callback(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
256 struct smu_softc *sc = xsc;
258 sc->sc_cmd_phys = segs[0].ds_addr;
262 smu_attach(device_t dev)
264 struct smu_softc *sc;
265 phandle_t node, child;
268 sc = device_get_softc(dev);
270 mtx_init(&sc->sc_mtx, "smu", NULL, MTX_DEF);
271 sc->sc_cur_cmd = NULL;
272 sc->sc_doorbellirqid = -1;
275 if (OF_finddevice("/u3") != -1)
279 * Map the mailbox area. This should be determined from firmware,
280 * but I have not found a simple way to do that.
282 bus_dma_tag_create(NULL, 16, 0, BUS_SPACE_MAXADDR_32BIT,
283 BUS_SPACE_MAXADDR, NULL, NULL, PAGE_SIZE, 1, PAGE_SIZE, 0, NULL,
284 NULL, &(sc->sc_dmatag));
285 sc->sc_bt = &bs_le_tag;
286 bus_space_map(sc->sc_bt, SMU_MAILBOX, 4, 0, &sc->sc_mailbox);
289 * Allocate the command buffer. This can be anywhere in the low 4 GB
292 bus_dmamem_alloc(sc->sc_dmatag, (void **)&sc->sc_cmd, BUS_DMA_WAITOK |
293 BUS_DMA_ZERO, &sc->sc_cmd_dmamap);
294 bus_dmamap_load(sc->sc_dmatag, sc->sc_cmd_dmamap,
295 sc->sc_cmd, PAGE_SIZE, smu_phys_callback, sc, 0);
296 STAILQ_INIT(&sc->sc_cmdq);
299 * Set up handlers to change CPU voltage when CPU frequency is changed.
301 EVENTHANDLER_REGISTER(cpufreq_pre_change, smu_cpufreq_pre_change, dev,
302 EVENTHANDLER_PRI_ANY);
303 EVENTHANDLER_REGISTER(cpufreq_post_change, smu_cpufreq_post_change, dev,
304 EVENTHANDLER_PRI_ANY);
307 * Detect and attach child devices.
309 node = ofw_bus_get_node(dev);
310 for (child = OF_child(node); child != 0; child = OF_peer(child)) {
312 memset(name, 0, sizeof(name));
313 OF_getprop(child, "name", name, sizeof(name));
315 if (strncmp(name, "rpm-fans", 9) == 0 ||
316 strncmp(name, "fans", 5) == 0)
317 smu_attach_fans(dev, child);
319 if (strncmp(name, "sensors", 8) == 0)
320 smu_attach_sensors(dev, child);
322 if (strncmp(name, "smu-i2c-control", 15) == 0)
323 smu_attach_i2c(dev, child);
326 /* Some SMUs have the I2C children directly under the bus. */
327 smu_attach_i2c(dev, node);
330 * Collect calibration constants.
332 smu_get_datablock(dev, SMU_CPUTEMP_CAL, data, sizeof(data));
333 sc->sc_cpu_diode_scale = (data[4] << 8) + data[5];
334 sc->sc_cpu_diode_offset = (data[6] << 8) + data[7];
336 smu_get_datablock(dev, SMU_CPUVOLT_CAL, data, sizeof(data));
337 sc->sc_cpu_volt_scale = (data[4] << 8) + data[5];
338 sc->sc_cpu_volt_offset = (data[6] << 8) + data[7];
339 sc->sc_cpu_curr_scale = (data[8] << 8) + data[9];
340 sc->sc_cpu_curr_offset = (data[10] << 8) + data[11];
342 smu_get_datablock(dev, SMU_SLOTPW_CAL, data, sizeof(data));
343 sc->sc_slots_pow_scale = (data[4] << 8) + data[5];
344 sc->sc_slots_pow_offset = (data[6] << 8) + data[7];
347 * Set up LED interface
349 sc->sc_leddev = led_create(smu_set_sleepled, dev, "sleepled");
352 * Reset on power loss behavior
355 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
356 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
357 "server_mode", CTLTYPE_INT | CTLFLAG_RW, dev, 0,
358 smu_server_mode, "I", "Enable reboot after power failure");
361 * Set up doorbell interrupt.
363 sc->sc_doorbellirqid = 0;
364 sc->sc_doorbellirq = bus_alloc_resource_any(smu_doorbell, SYS_RES_IRQ,
365 &sc->sc_doorbellirqid, RF_ACTIVE);
366 bus_setup_intr(smu_doorbell, sc->sc_doorbellirq,
367 INTR_TYPE_MISC | INTR_MPSAFE, NULL, smu_doorbell_intr, dev,
368 &sc->sc_doorbellirqcookie);
369 powerpc_config_intr(rman_get_start(sc->sc_doorbellirq),
370 INTR_TRIGGER_EDGE, INTR_POLARITY_LOW);
373 * Connect RTC interface.
375 clock_register(dev, 1000);
378 * Learn about shutdown events
380 EVENTHANDLER_REGISTER(shutdown_final, smu_shutdown, dev,
383 return (bus_generic_attach(dev));
386 static const struct ofw_bus_devinfo *
387 smu_get_devinfo(device_t bus, device_t dev)
390 return (device_get_ivars(dev));
394 smu_send_cmd(device_t dev, struct smu_cmd *cmd)
396 struct smu_softc *sc;
398 sc = device_get_softc(dev);
400 mtx_assert(&sc->sc_mtx, MA_OWNED);
403 powerpc_pow_enabled = 0; /* SMU cannot work if we go to NAP */
405 sc->sc_cur_cmd = cmd;
407 /* Copy the command to the mailbox */
408 sc->sc_cmd->cmd = cmd->cmd;
409 sc->sc_cmd->len = cmd->len;
410 memcpy(sc->sc_cmd->data, cmd->data, sizeof(cmd->data));
411 bus_dmamap_sync(sc->sc_dmatag, sc->sc_cmd_dmamap, BUS_DMASYNC_PREWRITE);
412 bus_space_write_4(sc->sc_bt, sc->sc_mailbox, 0, sc->sc_cmd_phys);
414 /* Flush the cacheline it is in -- SMU bypasses the cache */
415 __asm __volatile("sync; dcbf 0,%0; sync" :: "r"(sc->sc_cmd): "memory");
417 /* Ring SMU doorbell */
418 macgpio_write(smu_doorbell, GPIO_DDR_OUTPUT);
422 smu_doorbell_intr(void *xdev)
425 struct smu_softc *sc;
429 doorbell_ack = macgpio_read(smu_doorbell);
430 sc = device_get_softc(smu);
432 if (doorbell_ack != (GPIO_DDR_OUTPUT | GPIO_LEVEL_RO | GPIO_DATA))
435 mtx_lock(&sc->sc_mtx);
437 if (sc->sc_cur_cmd == NULL) /* spurious */
440 /* Check result. First invalidate the cache again... */
441 __asm __volatile("dcbf 0,%0; sync" :: "r"(sc->sc_cmd) : "memory");
443 bus_dmamap_sync(sc->sc_dmatag, sc->sc_cmd_dmamap, BUS_DMASYNC_POSTREAD);
445 sc->sc_cur_cmd->cmd = sc->sc_cmd->cmd;
446 sc->sc_cur_cmd->len = sc->sc_cmd->len;
447 memcpy(sc->sc_cur_cmd->data, sc->sc_cmd->data,
448 sizeof(sc->sc_cmd->data));
449 wakeup(sc->sc_cur_cmd);
450 sc->sc_cur_cmd = NULL;
452 powerpc_pow_enabled = 1;
455 /* Queue next command if one is pending */
456 if (STAILQ_FIRST(&sc->sc_cmdq) != NULL) {
457 sc->sc_cur_cmd = STAILQ_FIRST(&sc->sc_cmdq);
458 STAILQ_REMOVE_HEAD(&sc->sc_cmdq, cmd_q);
459 smu_send_cmd(smu, sc->sc_cur_cmd);
462 mtx_unlock(&sc->sc_mtx);
466 smu_run_cmd(device_t dev, struct smu_cmd *cmd, int wait)
468 struct smu_softc *sc;
472 sc = device_get_softc(dev);
475 mtx_lock(&sc->sc_mtx);
476 if (sc->sc_cur_cmd != NULL) {
477 STAILQ_INSERT_TAIL(&sc->sc_cmdq, cmd, cmd_q);
479 smu_send_cmd(dev, cmd);
480 mtx_unlock(&sc->sc_mtx);
485 if (sc->sc_doorbellirqid < 0) {
486 /* Poll if the IRQ has not been set up yet */
489 smu_doorbell_intr(dev);
490 } while (sc->sc_cur_cmd != NULL);
492 /* smu_doorbell_intr will wake us when the command is ACK'ed */
493 error = tsleep(cmd, 0, "smu", 800 * hz / 1000);
495 smu_doorbell_intr(dev); /* One last chance */
498 mtx_lock(&sc->sc_mtx);
499 if (cmd->cmd == cmd_code) { /* Never processed */
500 /* Abort this command if we timed out */
501 if (sc->sc_cur_cmd == cmd)
502 sc->sc_cur_cmd = NULL;
504 STAILQ_REMOVE(&sc->sc_cmdq, cmd, smu_cmd,
506 mtx_unlock(&sc->sc_mtx);
510 mtx_unlock(&sc->sc_mtx);
514 /* SMU acks the command by inverting the command bits */
515 if (cmd->cmd == ((~cmd_code) & 0xff))
524 smu_get_datablock(device_t dev, int8_t id, uint8_t *buf, size_t len)
529 cmd.cmd = SMU_PARTITION;
531 cmd.data[0] = SMU_PARTITION_LATEST;
534 smu_run_cmd(dev, &cmd, 1);
536 addr[0] = addr[1] = 0;
537 addr[2] = cmd.data[0];
538 addr[3] = cmd.data[1];
542 cmd.data[0] = SMU_MISC_GET_DATA;
543 cmd.data[1] = sizeof(addr);
544 memcpy(&cmd.data[2], addr, sizeof(addr));
547 smu_run_cmd(dev, &cmd, 1);
548 memcpy(buf, cmd.data, len);
553 smu_slew_cpu_voltage(device_t dev, int to)
568 smu_run_cmd(dev, &cmd, 1);
572 smu_cpufreq_pre_change(device_t dev, const struct cf_level *level)
575 * Make sure the CPU voltage is raised before we raise
579 if (level->rel_set[0].freq == 10000 /* max */)
580 smu_slew_cpu_voltage(dev, 0);
584 smu_cpufreq_post_change(device_t dev, const struct cf_level *level)
586 /* We are safe to reduce CPU voltage after a downward transition */
588 if (level->rel_set[0].freq < 10000 /* max */)
589 smu_slew_cpu_voltage(dev, 1); /* XXX: 1/4 voltage for 970MP? */
592 /* Routines for probing the SMU doorbell GPIO */
593 static int doorbell_probe(device_t dev);
594 static int doorbell_attach(device_t dev);
596 static device_method_t doorbell_methods[] = {
597 /* Device interface */
598 DEVMETHOD(device_probe, doorbell_probe),
599 DEVMETHOD(device_attach, doorbell_attach),
603 static driver_t doorbell_driver = {
609 static devclass_t doorbell_devclass;
611 DRIVER_MODULE(smudoorbell, macgpio, doorbell_driver, doorbell_devclass, 0, 0);
614 doorbell_probe(device_t dev)
616 const char *name = ofw_bus_get_name(dev);
618 if (strcmp(name, "smu-doorbell") != 0)
621 device_set_desc(dev, "SMU Doorbell GPIO");
627 doorbell_attach(device_t dev)
634 * Sensor and fan management
638 smu_fan_set_rpm(struct smu_fan *fan, int rpm)
640 device_t smu = fan->dev;
647 /* Clamp to allowed range */
648 rpm = max(fan->fan.min_rpm, rpm);
649 rpm = min(fan->fan.max_rpm, rpm);
652 * Apple has two fan control mechanisms. We can't distinguish
653 * them except by seeing if the new one fails. If the new one
654 * fails, use the old one.
657 if (!fan->old_style) {
660 cmd.data[1] = fan->reg;
661 cmd.data[2] = (rpm >> 8) & 0xff;
662 cmd.data[3] = rpm & 0xff;
664 error = smu_run_cmd(smu, &cmd, 1);
665 if (error && error != EWOULDBLOCK)
669 if (fan->old_style) {
672 cmd.data[1] = 1 << fan->reg;
673 cmd.data[2 + 2*fan->reg] = (rpm >> 8) & 0xff;
674 cmd.data[3 + 2*fan->reg] = rpm & 0xff;
675 error = smu_run_cmd(smu, &cmd, 1);
685 smu_fan_read_rpm(struct smu_fan *fan)
687 device_t smu = fan->dev;
691 if (!fan->old_style) {
695 cmd.data[1] = fan->reg;
697 error = smu_run_cmd(smu, &cmd, 1);
698 if (error && error != EWOULDBLOCK)
701 rpm = (cmd.data[0] << 8) | cmd.data[1];
704 if (fan->old_style) {
709 error = smu_run_cmd(smu, &cmd, 1);
713 rpm = (cmd.data[fan->reg*2+1] << 8) | cmd.data[fan->reg*2+2];
720 smu_fanrpm_sysctl(SYSCTL_HANDLER_ARGS)
723 struct smu_softc *sc;
728 sc = device_get_softc(smu);
729 fan = &sc->sc_fans[arg2];
731 rpm = smu_fan_read_rpm(fan);
735 error = sysctl_handle_int(oidp, &rpm, 0, req);
737 if (error || !req->newptr)
740 sc->sc_lastuserchange = time_uptime;
742 return (smu_fan_set_rpm(fan, rpm));
746 smu_attach_fans(device_t dev, phandle_t fanroot)
749 struct smu_softc *sc;
750 struct sysctl_oid *oid, *fanroot_oid;
751 struct sysctl_ctx_list *ctx;
753 char type[32], sysctl_name[32];
756 sc = device_get_softc(dev);
759 for (child = OF_child(fanroot); child != 0; child = OF_peer(child))
762 if (sc->sc_nfans == 0) {
763 device_printf(dev, "WARNING: No fans detected!\n");
767 sc->sc_fans = malloc(sc->sc_nfans * sizeof(struct smu_fan), M_SMU,
773 ctx = device_get_sysctl_ctx(dev);
774 fanroot_oid = SYSCTL_ADD_NODE(ctx,
775 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "fans",
776 CTLFLAG_RD, 0, "SMU Fan Information");
778 for (child = OF_child(fanroot); child != 0; child = OF_peer(child)) {
779 OF_getprop(child, "device_type", type, sizeof(type));
780 if (strcmp(type, "fan-rpm-control") != 0)
785 OF_getprop(child, "reg", &fan->reg, sizeof(cell_t));
786 OF_getprop(child, "min-value", &fan->fan.min_rpm, sizeof(int));
787 OF_getprop(child, "max-value", &fan->fan.max_rpm, sizeof(int));
788 OF_getprop(child, "zone", &fan->fan.zone, sizeof(int));
790 if (OF_getprop(child, "unmanaged-value", &fan->fan.default_rpm,
791 sizeof(int)) != sizeof(int))
792 fan->fan.default_rpm = fan->fan.max_rpm;
794 fan->setpoint = smu_fan_read_rpm(fan);
796 OF_getprop(child, "location", fan->fan.name,
797 sizeof(fan->fan.name));
800 for (i = 0; i < strlen(fan->fan.name); i++) {
801 sysctl_name[i] = tolower(fan->fan.name[i]);
802 if (isspace(sysctl_name[i]))
803 sysctl_name[i] = '_';
807 oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(fanroot_oid),
808 OID_AUTO, sysctl_name, CTLFLAG_RD, 0, "Fan Information");
809 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "minrpm",
810 CTLTYPE_INT | CTLFLAG_RD, &fan->fan.min_rpm, sizeof(int),
811 "Minimum allowed RPM");
812 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "maxrpm",
813 CTLTYPE_INT | CTLFLAG_RD, &fan->fan.max_rpm, sizeof(int),
814 "Maximum allowed RPM");
815 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "rpm",
816 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, dev,
817 sc->sc_nfans, smu_fanrpm_sysctl, "I", "Fan RPM");
819 fan->fan.read = (int (*)(struct pmac_fan *))smu_fan_read_rpm;
820 fan->fan.set = (int (*)(struct pmac_fan *, int))smu_fan_set_rpm;
821 pmac_thermal_fan_register(&fan->fan);
829 smu_sensor_read(struct smu_sensor *sens)
831 device_t smu = sens->dev;
833 struct smu_softc *sc;
839 cmd.data[0] = sens->reg;
842 error = smu_run_cmd(smu, &cmd, 1);
846 sc = device_get_softc(smu);
847 value = (cmd.data[0] << 8) | cmd.data[1];
849 switch (sens->type) {
850 case SMU_TEMP_SENSOR:
851 value *= sc->sc_cpu_diode_scale;
853 value += ((int64_t)sc->sc_cpu_diode_offset) << 9;
856 /* Convert from 16.16 fixed point degC into integer 0.1 K. */
857 value = 10*(value >> 16) + ((10*(value & 0xffff)) >> 16) + 2732;
859 case SMU_VOLTAGE_SENSOR:
860 value *= sc->sc_cpu_volt_scale;
861 value += sc->sc_cpu_volt_offset;
864 /* Convert from 16.16 fixed point V into mV. */
869 case SMU_CURRENT_SENSOR:
870 value *= sc->sc_cpu_curr_scale;
871 value += sc->sc_cpu_curr_offset;
874 /* Convert from 16.16 fixed point A into mA. */
879 case SMU_POWER_SENSOR:
880 value *= sc->sc_slots_pow_scale;
881 value += sc->sc_slots_pow_offset;
884 /* Convert from 16.16 fixed point W into mW. */
895 smu_sensor_sysctl(SYSCTL_HANDLER_ARGS)
898 struct smu_softc *sc;
899 struct smu_sensor *sens;
903 sc = device_get_softc(smu);
904 sens = &sc->sc_sensors[arg2];
906 value = smu_sensor_read(sens);
910 error = sysctl_handle_int(oidp, &value, 0, req);
916 smu_attach_sensors(device_t dev, phandle_t sensroot)
918 struct smu_sensor *sens;
919 struct smu_softc *sc;
920 struct sysctl_oid *sensroot_oid;
921 struct sysctl_ctx_list *ctx;
926 sc = device_get_softc(dev);
929 for (child = OF_child(sensroot); child != 0; child = OF_peer(child))
932 if (sc->sc_nsensors == 0) {
933 device_printf(dev, "WARNING: No sensors detected!\n");
937 sc->sc_sensors = malloc(sc->sc_nsensors * sizeof(struct smu_sensor),
938 M_SMU, M_WAITOK | M_ZERO);
940 sens = sc->sc_sensors;
943 ctx = device_get_sysctl_ctx(dev);
944 sensroot_oid = SYSCTL_ADD_NODE(ctx,
945 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "sensors",
946 CTLFLAG_RD, 0, "SMU Sensor Information");
948 for (child = OF_child(sensroot); child != 0; child = OF_peer(child)) {
949 char sysctl_name[40], sysctl_desc[40];
953 OF_getprop(child, "device_type", type, sizeof(type));
955 if (strcmp(type, "current-sensor") == 0) {
956 sens->type = SMU_CURRENT_SENSOR;
958 } else if (strcmp(type, "temp-sensor") == 0) {
959 sens->type = SMU_TEMP_SENSOR;
961 } else if (strcmp(type, "voltage-sensor") == 0) {
962 sens->type = SMU_VOLTAGE_SENSOR;
964 } else if (strcmp(type, "power-sensor") == 0) {
965 sens->type = SMU_POWER_SENSOR;
971 OF_getprop(child, "reg", &sens->reg, sizeof(cell_t));
972 OF_getprop(child, "zone", &sens->therm.zone, sizeof(int));
973 OF_getprop(child, "location", sens->therm.name,
974 sizeof(sens->therm.name));
976 for (i = 0; i < strlen(sens->therm.name); i++) {
977 sysctl_name[i] = tolower(sens->therm.name[i]);
978 if (isspace(sysctl_name[i]))
979 sysctl_name[i] = '_';
983 sprintf(sysctl_desc,"%s (%s)", sens->therm.name, units);
985 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(sensroot_oid), OID_AUTO,
986 sysctl_name, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
987 dev, sc->sc_nsensors, smu_sensor_sysctl,
988 (sens->type == SMU_TEMP_SENSOR) ? "IK" : "I", sysctl_desc);
990 if (sens->type == SMU_TEMP_SENSOR) {
991 /* Make up some numbers */
992 sens->therm.target_temp = 500 + 2732; /* 50 C */
993 sens->therm.max_temp = 900 + 2732; /* 90 C */
996 (int (*)(struct pmac_therm *))smu_sensor_read;
997 pmac_thermal_sensor_register(&sens->therm);
1006 smu_set_sleepled(void *xdev, int onoff)
1008 static struct smu_cmd cmd;
1009 device_t smu = xdev;
1013 cmd.data[0] = SMU_MISC_LED_CTRL;
1015 cmd.data[2] = onoff;
1017 smu_run_cmd(smu, &cmd, 0);
1021 smu_server_mode(SYSCTL_HANDLER_ARGS)
1025 device_t smu = arg1;
1028 cmd.cmd = SMU_POWER_EVENTS;
1030 cmd.data[0] = SMU_PWR_GET_POWERUP;
1032 error = smu_run_cmd(smu, &cmd, 1);
1037 server_mode = (cmd.data[1] & SMU_WAKEUP_AC_INSERT) ? 1 : 0;
1039 error = sysctl_handle_int(oidp, &server_mode, 0, req);
1041 if (error || !req->newptr)
1044 if (server_mode == 1)
1045 cmd.data[0] = SMU_PWR_SET_POWERUP;
1046 else if (server_mode == 0)
1047 cmd.data[0] = SMU_PWR_CLR_POWERUP;
1053 cmd.data[2] = SMU_WAKEUP_AC_INSERT;
1055 return (smu_run_cmd(smu, &cmd, 1));
1059 smu_shutdown(void *xdev, int howto)
1061 device_t smu = xdev;
1064 cmd.cmd = SMU_POWER;
1065 if (howto & RB_HALT)
1066 strcpy(cmd.data, "SHUTDOWN");
1068 strcpy(cmd.data, "RESTART");
1070 cmd.len = strlen(cmd.data);
1072 smu_run_cmd(smu, &cmd, 1);
1078 smu_gettime(device_t dev, struct timespec *ts)
1081 struct clocktime ct;
1085 cmd.data[0] = SMU_RTC_GET;
1087 if (smu_run_cmd(dev, &cmd, 1) != 0)
1091 ct.sec = bcd2bin(cmd.data[0]);
1092 ct.min = bcd2bin(cmd.data[1]);
1093 ct.hour = bcd2bin(cmd.data[2]);
1094 ct.dow = bcd2bin(cmd.data[3]);
1095 ct.day = bcd2bin(cmd.data[4]);
1096 ct.mon = bcd2bin(cmd.data[5]);
1097 ct.year = bcd2bin(cmd.data[6]) + 2000;
1099 return (clock_ct_to_ts(&ct, ts));
1103 smu_settime(device_t dev, struct timespec *ts)
1105 static struct smu_cmd cmd;
1106 struct clocktime ct;
1110 cmd.data[0] = SMU_RTC_SET;
1112 clock_ts_to_ct(ts, &ct);
1114 cmd.data[1] = bin2bcd(ct.sec);
1115 cmd.data[2] = bin2bcd(ct.min);
1116 cmd.data[3] = bin2bcd(ct.hour);
1117 cmd.data[4] = bin2bcd(ct.dow);
1118 cmd.data[5] = bin2bcd(ct.day);
1119 cmd.data[6] = bin2bcd(ct.mon);
1120 cmd.data[7] = bin2bcd(ct.year - 2000);
1122 return (smu_run_cmd(dev, &cmd, 0));
1125 /* SMU I2C Interface */
1127 static int smuiic_probe(device_t dev);
1128 static int smuiic_attach(device_t dev);
1129 static int smuiic_transfer(device_t dev, struct iic_msg *msgs, uint32_t nmsgs);
1130 static phandle_t smuiic_get_node(device_t bus, device_t dev);
1132 static device_method_t smuiic_methods[] = {
1133 /* device interface */
1134 DEVMETHOD(device_probe, smuiic_probe),
1135 DEVMETHOD(device_attach, smuiic_attach),
1137 /* iicbus interface */
1138 DEVMETHOD(iicbus_callback, iicbus_null_callback),
1139 DEVMETHOD(iicbus_transfer, smuiic_transfer),
1141 /* ofw_bus interface */
1142 DEVMETHOD(ofw_bus_get_node, smuiic_get_node),
1147 struct smuiic_softc {
1149 volatile int sc_iic_inuse;
1153 static driver_t smuiic_driver = {
1156 sizeof(struct smuiic_softc)
1158 static devclass_t smuiic_devclass;
1160 DRIVER_MODULE(smuiic, smu, smuiic_driver, smuiic_devclass, 0, 0);
1163 smu_attach_i2c(device_t smu, phandle_t i2croot)
1167 struct ofw_bus_devinfo *dinfo;
1170 for (child = OF_child(i2croot); child != 0; child = OF_peer(child)) {
1171 if (OF_getprop(child, "name", name, sizeof(name)) <= 0)
1174 if (strcmp(name, "i2c-bus") != 0 && strcmp(name, "i2c") != 0)
1177 dinfo = malloc(sizeof(struct ofw_bus_devinfo), M_SMU,
1179 if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) {
1184 cdev = device_add_child(smu, NULL, -1);
1186 device_printf(smu, "<%s>: device_add_child failed\n",
1188 ofw_bus_gen_destroy_devinfo(dinfo);
1192 device_set_ivars(cdev, dinfo);
1197 smuiic_probe(device_t dev)
1201 name = ofw_bus_get_name(dev);
1205 if (strcmp(name, "i2c-bus") == 0 || strcmp(name, "i2c") == 0) {
1206 device_set_desc(dev, "SMU I2C controller");
1214 smuiic_attach(device_t dev)
1216 struct smuiic_softc *sc = device_get_softc(dev);
1217 mtx_init(&sc->sc_mtx, "smuiic", NULL, MTX_DEF);
1218 sc->sc_iic_inuse = 0;
1220 /* Get our bus number */
1221 OF_getprop(ofw_bus_get_node(dev), "reg", &sc->sc_busno,
1222 sizeof(sc->sc_busno));
1224 /* Add the IIC bus layer */
1225 device_add_child(dev, "iicbus", -1);
1227 return (bus_generic_attach(dev));
1231 smuiic_transfer(device_t dev, struct iic_msg *msgs, uint32_t nmsgs)
1233 struct smuiic_softc *sc = device_get_softc(dev);
1237 mtx_lock(&sc->sc_mtx);
1238 while (sc->sc_iic_inuse)
1239 mtx_sleep(sc, &sc->sc_mtx, 0, "smuiic", 100);
1241 sc->sc_iic_inuse = 1;
1244 for (i = 0; i < nmsgs; i++) {
1246 cmd.data[0] = sc->sc_busno;
1247 if (msgs[i].flags & IIC_M_NOSTOP)
1248 cmd.data[1] = SMU_I2C_COMBINED;
1250 cmd.data[1] = SMU_I2C_SIMPLE;
1252 cmd.data[2] = msgs[i].slave;
1253 if (msgs[i].flags & IIC_M_RD)
1256 if (msgs[i].flags & IIC_M_NOSTOP) {
1257 KASSERT(msgs[i].len < 4,
1258 ("oversize I2C combined message"));
1260 cmd.data[3] = min(msgs[i].len, 3);
1261 memcpy(&cmd.data[4], msgs[i].buf, min(msgs[i].len, 3));
1262 i++; /* Advance to next part of message */
1265 memset(&cmd.data[4], 0, 3);
1268 cmd.data[7] = msgs[i].slave;
1269 if (msgs[i].flags & IIC_M_RD)
1272 cmd.data[8] = msgs[i].len;
1273 if (msgs[i].flags & IIC_M_RD) {
1274 memset(&cmd.data[9], 0xff, msgs[i].len);
1277 memcpy(&cmd.data[9], msgs[i].buf, msgs[i].len);
1278 cmd.len = 9 + msgs[i].len;
1281 mtx_unlock(&sc->sc_mtx);
1282 smu_run_cmd(device_get_parent(dev), &cmd, 1);
1283 mtx_lock(&sc->sc_mtx);
1285 for (j = 0; j < 10; j++) {
1289 memset(&cmd.data[1], 0xff, msgs[i].len);
1291 mtx_unlock(&sc->sc_mtx);
1292 smu_run_cmd(device_get_parent(dev), &cmd, 1);
1293 mtx_lock(&sc->sc_mtx);
1295 if (!(cmd.data[0] & 0x80))
1298 mtx_sleep(sc, &sc->sc_mtx, 0, "smuiic", 10);
1301 if (cmd.data[0] & 0x80) {
1306 memcpy(msgs[i].buf, &cmd.data[1], msgs[i].len);
1307 msgs[i].len = cmd.len - 1;
1311 sc->sc_iic_inuse = 0;
1312 mtx_unlock(&sc->sc_mtx);
1318 smuiic_get_node(device_t bus, device_t dev)
1321 return (ofw_bus_get_node(bus));