* Copyright (c) 2006 Michael Lorenz

/* $NetBSD: pmu.c,v 1.41 2023/08/30 07:42:41 macallan Exp $ */

/*-
* Copyright (c) 2006 Michael Lorenz
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pmu.c,v 1.41 2023/08/30 07:42:41 macallan Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/kthread.h>
#include <sys/atomic.h>
#include <sys/condvar.h>
#include <sys/mutex.h>

#include <sys/bus.h>
#include <machine/pio.h>
#include <machine/autoconf.h>
#include <dev/clock_subr.h>
#include <dev/i2c/i2cvar.h>

#include <dev/sysmon/sysmonvar.h>

#include <macppc/dev/viareg.h>
#include <macppc/dev/pmuvar.h>
#include <macppc/dev/batteryvar.h>

#include <dev/ofw/openfirm.h>
#include <dev/adb/adbvar.h>
#include "opt_pmu.h"
#include "nadb.h"

#ifdef PMU_DEBUG
#define DPRINTF printf
#else
#define DPRINTF while (0) printf
#endif

#define PMU_NOTREADY 0x1 /* has not been initialized yet */
#define PMU_IDLE 0x2 /* the bus is currently idle */
#define PMU_OUT 0x3 /* sending out a command */
#define PMU_IN 0x4 /* receiving data */

static void pmu_attach(device_t, device_t, void *);
static int pmu_match(device_t, cfdata_t, void *);
static void pmu_autopoll(void *, int);

static int pmu_intr(void *);

/* bits for sc_pending, as signals to the event thread */
#define PMU_EV_CARD0 1
#define PMU_EV_CARD1 2
#define PMU_EV_BUTTON 4
#define PMU_EV_LID 8

struct pmu_softc {
device_t sc_dev;
void *sc_ih;
struct todr_chip_handle sc_todr;
struct adb_bus_accessops sc_adbops;
struct i2c_controller sc_i2c;
struct pmu_ops sc_pmu_ops;
struct sysmon_pswitch sc_lidswitch;
struct sysmon_pswitch sc_powerbutton;
bus_space_tag_t sc_memt;
bus_space_handle_t sc_memh;
uint32_t sc_flags;
#define PMU_HAS_BACKLIGHT_CONTROL 1
int sc_node;
int sc_error;
int sc_autopoll;
int sc_brightness, sc_brightness_wanted;
int sc_volume, sc_volume_wanted;
int sc_lid_closed;
int sc_button;
uint8_t sc_env_old;
uint8_t sc_env_mask;
/* deferred processing */
lwp_t *sc_thread;
int sc_pending;
/* signalling the event thread */
kcondvar_t sc_event;
kmutex_t sc_evmtx;
/* ADB */
void (*sc_adb_handler)(void *, int, uint8_t *);
void *sc_adb_cookie;
void (*sc_callback)(void *);
void *sc_cb_cookie;
};

CFATTACH_DECL_NEW(pmu, sizeof(struct pmu_softc),
pmu_match, pmu_attach, NULL, NULL);

static inline void pmu_write_reg(struct pmu_softc *, int, uint8_t);
static inline uint8_t pmu_read_reg(struct pmu_softc *, int);
static void pmu_in(struct pmu_softc *);
static void pmu_out(struct pmu_softc *);
static void pmu_ack_off(struct pmu_softc *);
static void pmu_ack_on(struct pmu_softc *);
static int pmu_intr_state(struct pmu_softc *);

static void pmu_init(struct pmu_softc *);
static void pmu_thread(void *);
static void pmu_eject_card(struct pmu_softc *, int);
static void pmu_update_brightness(struct pmu_softc *);
static void pmu_register_callback(void *, void (*)(void *), void *);
/*
* send a message to the PMU.
*/
static int pmu_send(void *, int, int, uint8_t *, int, uint8_t *);
static void pmu_adb_poll(void *);
static int pmu_todr_set(todr_chip_handle_t, struct timeval *);
static int pmu_todr_get(todr_chip_handle_t, struct timeval *);

static int pmu_adb_handler(void *, int, uint8_t *);

static struct pmu_softc *pmu0 = NULL;

/* ADB bus attachment stuff */
static int pmu_adb_send(void *, int, int, int, uint8_t *);
static int pmu_adb_set_handler(void *, void (*)(void *, int, uint8_t *), void *);

/* i2c stuff */
static int pmu_i2c_exec(void *, i2c_op_t, i2c_addr_t, const void *, size_t,
void *, size_t, int);

static void pmu_attach_legacy_battery(struct pmu_softc *);
static void pmu_attach_smart_battery(struct pmu_softc *, int);
static int pmu_print(void *, const char *);

/* these values shows that number of data returned after 'send' cmd is sent */
static signed char pm_send_cmd_type[] = {
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
0x01, 0x01, -1, -1, -1, -1, -1, -1,
0x00, 0x00, -1, -1, -1, -1, -1, 0x00,
-1, 0x00, 0x02, 0x01, 0x01, -1, -1, -1,
0x00, -1, -1, -1, -1, -1, -1, -1,
0x04, 0x14, -1, 0x03, -1, -1, -1, -1,
0x00, 0x00, 0x02, 0x02, -1, -1, -1, -1,
0x01, 0x01, -1, -1, -1, -1, -1, -1,
0x00, 0x00, -1, -1, 0x01, -1, -1, -1,
0x01, 0x00, 0x02, 0x02, -1, 0x01, 0x03, 0x01,
0x00, 0x01, 0x00, 0x00, 0x00, -1, -1, -1,
0x02, -1, -1, -1, -1, -1, -1, -1,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, -1, -1,
0x01, 0x01, 0x01, -1, -1, -1, -1, -1,
0x00, 0x00, -1, -1, -1, -1, 0x04, 0x04,
0x04, -1, 0x00, -1, -1, -1, -1, -1,
0x00, -1, -1, -1, -1, -1, -1, -1,
0x01, 0x02, -1, -1, -1, -1, -1, -1,
0x00, 0x00, -1, -1, -1, -1, -1, -1,
0x02, 0x02, 0x02, 0x04, -1, 0x00, -1, -1,
0x01, 0x01, 0x03, 0x02, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
0x00, -1, -1, -1, -1, -1, -1, -1,
0x01, 0x01, -1, -1, 0x00, 0x00, -1, -1,
-1, 0x04, 0x00, -1, -1, -1, -1, -1,
0x03, -1, 0x00, -1, 0x00, -1, -1, 0x00,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1
};

/* these values shows that number of data returned after 'receive' cmd is sent */
static signed char pm_receive_cmd_type[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-1, -1, -1, -1, -1, -1, -1, -1,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x02, -1, -1, -1, -1, -1, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-1, -1, -1, -1, -1, -1, -1, -1,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x05, 0x15, -1, 0x02, -1, -1, -1, -1,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x02, -1, -1, -1, -1, -1, -1,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x00, 0x03, 0x03, -1, -1, -1, -1,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x04, 0x04, 0x03, 0x09, -1, -1, -1, -1,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-1, -1, -1, -1, -1, -1, 0x01, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x06, -1, -1, -1, -1, -1, -1, -1,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x02, -1, -1, -1, -1, -1, -1,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x00, 0x00, 0x00, -1, -1, -1, -1,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-1, -1, -1, -1, -1, -1, -1, -1,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-1, -1, -1, -1, -1, -1, -1, -1,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x02, -1, -1, 0x02, -1, -1, -1,
0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
-1, -1, 0x02, -1, -1, -1, -1, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-1, -1, -1, -1, -1, -1, -1, -1,
};

static const char *has_legacy_battery[] = {
"AAPL,3500",
"AAPL,3400/2400",
NULL };

static const char *has_two_smart_batteries[] = {
"AAPL,PowerBook1998",
"PowerBook1,1",
NULL };

static int
pmu_match(device_t parent, cfdata_t cf, void *aux)
{
struct confargs *ca = aux;

if (ca->ca_nreg < 8)
return 0;

if (ca->ca_nintr < 4)
return 0;

if (strcmp(ca->ca_name, "via-pmu") == 0) {
return 10;
}

return 0;
}

static void
pmu_attach(device_t parent, device_t self, void *aux)
{
struct confargs *ca = aux;
struct pmu_softc *sc = device_private(self);
struct i2cbus_attach_args iba;
uint32_t regs[16];
int irq = ca->ca_intr[0];
int node, extint_node, root_node;
int nbat = 1, i, pmnode;
int type = IST_EDGE;
uint8_t cmd[2] = {2, 0};
uint8_t resp[16];
char name[256], model[32];
prop_dictionary_t dict = device_properties(self);

extint_node = of_getnode_byname(OF_parent(ca->ca_node), "extint-gpio1");
if (extint_node) {

OF_getprop(extint_node, "interrupts", &irq, 4);
type = IST_LEVEL;
}

aprint_normal(" irq %d: ", irq);

sc->sc_dev = self;
sc->sc_node = ca->ca_node;
sc->sc_memt = ca->ca_tag;

root_node = OF_finddevice("/");

sc->sc_error = 0;
sc->sc_autopoll = 0;
sc->sc_pending = 0;
sc->sc_env_old = 0;
sc->sc_brightness = sc->sc_brightness_wanted = 0x80;
sc->sc_volume = sc->sc_volume_wanted = 0x80;
sc->sc_flags = 0;
sc->sc_callback = NULL;
sc->sc_lid_closed = 0;
sc->sc_button = 0;
sc->sc_env_mask = 0xff;

cv_init(&sc->sc_event, "pmu_event");
mutex_init(&sc->sc_evmtx, MUTEX_DEFAULT, IPL_NONE);

/*
* core99 PowerMacs like to send environment messages with the lid
* switch bit set - since that doesn't make any sense here and it
* probably means something else anyway we mask it out
*/

if (OF_getprop(root_node, "model", model, 32) != 0) {
if (strncmp(model, "PowerMac", 8) == 0) {
sc->sc_env_mask = PMU_ENV_POWER_BUTTON;
}
}

if (bus_space_map(sc->sc_memt, ca->ca_reg[0] + ca->ca_baseaddr,
ca->ca_reg[1], 0, &sc->sc_memh) != 0) {
aprint_error_dev(self, "unable to map registers\n");
return;
}
sc->sc_ih = intr_establish_xname(irq, type, IPL_TTY, pmu_intr, sc,
device_xname(self));

pmu_init(sc);

sc->sc_pmu_ops.cookie = sc;
sc->sc_pmu_ops.do_command = pmu_send;
sc->sc_pmu_ops.register_callback = pmu_register_callback;

if (pmu0 == NULL)
pmu0 = sc;

pmu_send(sc, PMU_SYSTEM_READY, 1, cmd, 16, resp);

/* check what kind of PMU we're talking to */
if (pmu_send(sc, PMU_GET_VERSION, 0, cmd, 16, resp) > 1)
aprint_normal(" rev. %d", resp[1]);
aprint_normal("\n");

node = OF_child(sc->sc_node);

while (node != 0) {

if (OF_getprop(node, "name", name, 256) <= 0)
goto next;

if (strncmp(name, "pmu-i2c", 8) == 0) {
int devs, sensors;
uint32_t addr;
char compat[256];
prop_array_t cfg;
prop_dictionary_t dev;
prop_data_t data;

aprint_normal_dev(self, "initializing IIC bus\n");

cfg = prop_array_create();
prop_dictionary_set(dict, "i2c-child-devices", cfg);
prop_object_release(cfg);

/* look for i2c devices */
devs = OF_child(node);
while (devs != 0) {
if (OF_getprop(devs, "name", name, 256) <= 0)
goto skip;
if (OF_getprop(devs, "compatible",
compat, 256) <= 0)
goto skip;
if (OF_getprop(devs, "reg", &addr, 4) <= 0)
goto skip;
addr = (addr & 0xff) >> 1;
DPRINTF("-> %s@%x\n", name, addr);
dev = prop_dictionary_create();
prop_dictionary_set_string(dev, "name", name);
data = prop_data_create_copy(compat, strlen(compat)+1);
prop_dictionary_set(dev, "compatible", data);
prop_object_release(data);
prop_dictionary_set_uint32(dev, "addr", addr);
prop_dictionary_set_uint64(dev, "cookie", devs);
sensors = OF_child(devs);
while (sensors != 0) {
int reg;
char loc[64];
char pname[8];
if (OF_getprop(sensors, "reg", &reg, 4) != 4)
goto nope;
if (OF_getprop(sensors, "location", loc, 63) <= 0)
goto nope;
snprintf(pname, 7, "s%02x", reg);
prop_dictionary_set_string(dev, pname, loc);
nope:
sensors = OF_peer(sensors);
}
prop_array_add(cfg, dev);
prop_object_release(dev);
skip:
devs = OF_peer(devs);
}
memset(&iba, 0, sizeof(iba));
iba.iba_tag = &sc->sc_i2c;
iic_tag_init(&sc->sc_i2c);
sc->sc_i2c.ic_cookie = sc;
sc->sc_i2c.ic_exec = pmu_i2c_exec;
config_found(sc->sc_dev, &iba, iicbus_print,
CFARGS(.iattr = "i2cbus"));
goto next;
}
if (strncmp(name, "adb", 4) == 0) {
aprint_normal_dev(self, "initializing ADB\n");
sc->sc_adbops.cookie = sc;
sc->sc_adbops.send = pmu_adb_send;
sc->sc_adbops.poll = pmu_adb_poll;
sc->sc_adbops.autopoll = pmu_autopoll;
sc->sc_adbops.set_handler = pmu_adb_set_handler;
#if NNADB > 0
config_found(self, &sc->sc_adbops, nadb_print,
CFARGS(.iattr = "adb_bus"));
#endif
goto next;
}
if (strncmp(name, "rtc", 4) == 0) {

aprint_normal_dev(self, "initializing RTC\n");
sc->sc_todr.todr_gettime = pmu_todr_get;
sc->sc_todr.todr_settime = pmu_todr_set;
sc->sc_todr.cookie = sc;
todr_attach(&sc->sc_todr);
goto next;
}
if (strncmp(name, "battery", 8) == 0)
goto next;

aprint_normal_dev(self, "%s not configured\n", name);
next:
node = OF_peer(node);
}

if (OF_finddevice("/bandit/ohare") != -1) {
aprint_normal_dev(self, "enabling ohare backlight control\n");
sc->sc_flags |= PMU_HAS_BACKLIGHT_CONTROL;
cmd[0] = 0;
cmd[1] = 0;
memset(resp, 0, 6);
if (pmu_send(sc, PMU_READ_BRIGHTNESS, 1, cmd, 16, resp) > 1) {
sc->sc_brightness_wanted = resp[1];
pmu_update_brightness(sc);
}
}

/* attach batteries */
if (of_compatible(root_node, has_legacy_battery)) {

pmu_attach_legacy_battery(sc);
} else if (of_compatible(root_node, has_two_smart_batteries)) {

pmu_attach_smart_battery(sc, 0);
pmu_attach_smart_battery(sc, 1);
} else {

/* check how many batteries we have */
pmnode = of_getnode_byname(ca->ca_node, "power-mgt");
if (pmnode == -1)
goto bat_done;
if (OF_getprop(pmnode, "prim-info", regs, sizeof(regs)) < 24)
goto bat_done;
nbat = regs[6] >> 16;
for (i = 0; i < nbat; i++)
pmu_attach_smart_battery(sc, i);
}
bat_done:

if (kthread_create(PRI_NONE, 0, NULL, pmu_thread, sc, &sc->sc_thread,
"%s", "pmu") != 0) {
aprint_error_dev(self, "unable to create event kthread\n");
}

sc->sc_lidswitch.smpsw_name = "Lid switch";
sc->sc_lidswitch.smpsw_type = PSWITCH_TYPE_LID;
if (sysmon_pswitch_register(&sc->sc_lidswitch) != 0)
aprint_error_dev(self,
"unable to register lid switch with sysmon\n");

sc->sc_powerbutton.smpsw_name = "Power button";
sc->sc_powerbutton.smpsw_type = PSWITCH_TYPE_POWER;
if (sysmon_pswitch_register(&sc->sc_powerbutton) != 0)
aprint_error_dev(self,
"unable to register power button with sysmon\n");
}

static void
pmu_register_callback(void *pmu_cookie, void (*cb)(void *), void *cookie)
{
struct pmu_softc *sc = pmu_cookie;

sc->sc_callback = cb;
sc->sc_cb_cookie = cookie;
}

static void
pmu_init(struct pmu_softc *sc)
{
uint8_t pmu_imask, resp[16];

pmu_imask =
PMU_INT_PCEJECT | PMU_INT_SNDBRT | PMU_INT_ADB/* | PMU_INT_TICK*/;
pmu_imask |= PMU_INT_BATTERY;
pmu_imask |= PMU_INT_ENVIRONMENT;
pmu_send(sc, PMU_SET_IMASK, 1, &pmu_imask, 16, resp);

pmu_write_reg(sc, vIER, 0x90); /* enable VIA interrupts */
}

static inline void
pmu_write_reg(struct pmu_softc *sc, int offset, uint8_t value)
{

bus_space_write_1(sc->sc_memt, sc->sc_memh, offset, value);
}

static inline uint8_t
pmu_read_reg(struct pmu_softc *sc, int offset)
{

return bus_space_read_1(sc->sc_memt, sc->sc_memh, offset);
}

static inline int
pmu_send_byte(struct pmu_softc *sc, uint8_t data)
{

pmu_out(sc);
pmu_write_reg(sc, vSR, data);
pmu_ack_off(sc);
/* wait for intr to come up */
/* XXX should add a timeout and bail if it expires */
do {} while (pmu_intr_state(sc) == 0);
pmu_ack_on(sc);
do {} while (pmu_intr_state(sc));
pmu_ack_on(sc);
DPRINTF(" %02x>", data);
return 0;
}

static inline int
pmu_read_byte(struct pmu_softc *sc, uint8_t *data)
{
pmu_in(sc);
(void)pmu_read_reg(sc, vSR);
pmu_ack_off(sc);
/* wait for intr to come up */
do {} while (pmu_intr_state(sc) == 0);
pmu_ack_on(sc);
do {} while (pmu_intr_state(sc));
*data = pmu_read_reg(sc, vSR);
DPRINTF(" <%02x", *data);
return 0;
}

static int
pmu_send(void *cookie, int cmd, int length, uint8_t *in_msg, int rlen,
uint8_t *out_msg)
{
struct pmu_softc *sc = cookie;
int i, rcv_len = -1, s;
uint8_t out_len, intreg;

DPRINTF("pmu_send: ");

s = splhigh();
intreg = pmu_read_reg(sc, vIER);
intreg &= 0x10;
pmu_write_reg(sc, vIER, intreg);

/* wait idle */
do {} while (pmu_intr_state(sc));
sc->sc_error = 0;

/* send command */
pmu_send_byte(sc, cmd);

/* send length if necessary */
if (pm_send_cmd_type[cmd] < 0) {
pmu_send_byte(sc, length);
}

for (i = 0; i < length; i++) {
pmu_send_byte(sc, in_msg[i]);
DPRINTF(" next ");
}
DPRINTF("done sending\n");

/* see if there's data to read */
rcv_len = pm_receive_cmd_type[cmd];
if (rcv_len == 0)
goto done;

/* read command */
if (rcv_len == 1) {
pmu_read_byte(sc, out_msg);
goto done;
} else
out_msg[0] = cmd;
if (rcv_len < 0) {
pmu_read_byte(sc, &out_len);
rcv_len = out_len + 1;
}
for (i = 1; i < uimin(rcv_len, rlen); i++)
pmu_read_byte(sc, &out_msg[i]);

done:
DPRINTF("\n");
pmu_write_reg(sc, vIER, (intreg == 0) ? 0 : 0x90);
splx(s);

return rcv_len;
}

static void
pmu_adb_poll(void *cookie)
{
struct pmu_softc *sc = cookie;
int s;

s = spltty();
pmu_intr(sc);
splx(s);
}

static void
pmu_in(struct pmu_softc *sc)
{
uint8_t reg;

reg = pmu_read_reg(sc, vACR);
reg &= ~vSR_OUT;
reg |= 0x0c;
pmu_write_reg(sc, vACR, reg);
}

static void
pmu_out(struct pmu_softc *sc)
{
uint8_t reg;

reg = pmu_read_reg(sc, vACR);
reg |= vSR_OUT;
reg |= 0x0c;
pmu_write_reg(sc, vACR, reg);
}

static void
pmu_ack_off(struct pmu_softc *sc)
{
uint8_t reg;

reg = pmu_read_reg(sc, vBufB);
reg &= ~vPB4;
pmu_write_reg(sc, vBufB, reg);
}

static void
pmu_ack_on(struct pmu_softc *sc)
{
uint8_t reg;

reg = pmu_read_reg(sc, vBufB);
reg |= vPB4;
pmu_write_reg(sc, vBufB, reg);
}

static int
pmu_intr_state(struct pmu_softc *sc)
{
return ((pmu_read_reg(sc, vBufB) & vPB3) == 0);
}

static int
pmu_intr(void *arg)
{
struct pmu_softc *sc = arg;
unsigned int len, i;
uint8_t resp[16];

DPRINTF(":");

pmu_write_reg(sc, vIFR, 0x90); /* Clear 'em */
len = pmu_send(sc, PMU_INT_ACK, 0, NULL, 16, resp);
if ((len < 1) || (resp[1] == 0))
goto done;
#ifdef PMU_DEBUG
{
DPRINTF("intr: %02x", resp[0]);
for (i = 1; i < len; i++)
DPRINTF(" %02x", resp[i]);
DPRINTF("\n");
}
#endif
if (resp[1] & PMU_INT_ADB) {
pmu_adb_handler(sc, len - 1, &resp[1]);
goto done;
}
if (resp[1] & PMU_INT_SNDBRT) {
/* deal with the brightness / volume control buttons */
DPRINTF("brightness: %d volume %d\n", resp[2], resp[3]);
sc->sc_brightness_wanted = resp[2];
sc->sc_volume_wanted = resp[3];
cv_signal(&sc->sc_event);
goto done;
}
if (resp[1] & PMU_INT_PCEJECT) {
/* deal with PCMCIA eject buttons */
DPRINTF("card eject %d\n", resp[3]);
atomic_or_32(&sc->sc_pending, (resp[3] & 3));
cv_signal(&sc->sc_event);
goto done;
}
if (resp[1] & PMU_INT_BATTERY) {
/* deal with battery messages */
printf("battery:");
for (i = 2; i < len; i++)
printf(" %02x", resp[i]);
printf("\n");
goto done;
}
if (resp[1] & PMU_INT_ENVIRONMENT) {
uint8_t diff;
#ifdef PMU_DEBUG
/* deal with environment messages */
printf("environment:");
for (i = 2; i < len; i++)
printf(" %02x", resp[i]);
printf("\n");
#endif
diff = (resp[2] ^ sc->sc_env_old ) & sc->sc_env_mask;
if (diff == 0) goto done;
sc->sc_env_old = resp[2];
if (diff & PMU_ENV_LID_CLOSED) {
sc->sc_lid_closed = (resp[2] & PMU_ENV_LID_CLOSED) != 0;
atomic_or_32(&sc->sc_pending, PMU_EV_LID);
cv_signal(&sc->sc_event);
}
if (diff & PMU_ENV_POWER_BUTTON) {
sc->sc_button = (resp[2] & PMU_ENV_POWER_BUTTON) != 0;
atomic_or_32(&sc->sc_pending, PMU_EV_BUTTON);
cv_signal(&sc->sc_event);
}
goto done;
}
if (resp[1] & PMU_INT_TICK) {
/* don't bother */
goto done;
}

/* unknown interrupt code?! */
#ifdef PMU_DEBUG
printf("pmu intr: %02x:", resp[1]);
for (i = 2; i < len; i++)
printf(" %02x", resp[i]);
printf("\n");
#endif
done:
return 1;
}

#define DIFF19041970 2082844800

static int
pmu_todr_get(todr_chip_handle_t tch, struct timeval *tvp)
{
struct pmu_softc *sc = tch->cookie;
uint32_t sec;
int count = 10;
int ok = FALSE;
uint8_t resp[16];

DPRINTF("pmu_todr_get\n");
while ((count > 0) && (!ok)) {
pmu_send(sc, PMU_READ_RTC, 0, NULL, 16, resp);

memcpy(&sec, &resp[1], 4);
tvp->tv_sec = sec - DIFF19041970;
ok = (sec > DIFF19041970) && (sec < 0xf0000000);
if (!ok) aprint_error_dev(sc->sc_dev,
"got garbage from rtc (%08x)\n", sec);
count--;
}
if (count == 0) {
aprint_error_dev(sc->sc_dev,
"unable to get a sane time value\n");
tvp->tv_sec = 0;
}
DPRINTF("tod: %" PRIo64 "\n", tvp->tv_sec);
tvp->tv_usec = 0;
return 0;
}

static int
pmu_todr_set(todr_chip_handle_t tch, struct timeval *tvp)
{
struct pmu_softc *sc = tch->cookie;
uint32_t sec;
uint8_t resp[16];

sec = tvp->tv_sec + DIFF19041970;
if (pmu_send(sc, PMU_SET_RTC, 4, (uint8_t *)&sec, 16, resp) >= 0)
return 0;
return -1;
}

void
pmu_poweroff(void)
{
struct pmu_softc *sc;
uint8_t cmd[] = {'M', 'A', 'T', 'T'};
uint8_t resp[16];

if (pmu0 == NULL)
return;
sc = pmu0;
if (pmu_send(sc, PMU_POWER_OFF, 4, cmd, 16, resp) >= 0)
while (1);
}

void
pmu_restart(void)
{
struct pmu_softc *sc;
uint8_t resp[16];

if (pmu0 == NULL)
return;
sc = pmu0;
if (pmu_send(sc, PMU_RESET_CPU, 0, NULL, 16, resp) >= 0)
while (1);
}

void
pmu_modem(int on)
{
struct pmu_softc *sc;
uint8_t resp[16], cmd[2] = {0, 0};

if (pmu0 == NULL)
return;

sc = pmu0;
cmd[0] = PMU_POW0_MODEM | (on ? PMU_POW0_ON : 0);
pmu_send(sc, PMU_POWER_CTRL0, 1, cmd, 16, resp);
}

static void
pmu_autopoll(void *cookie, int flag)
{
struct pmu_softc *sc = cookie;
/* magical incantation to re-enable autopolling */
uint8_t cmd[] = {0, PMU_SET_POLL_MASK, (flag >> 8) & 0xff, flag & 0xff};
uint8_t resp[16];

if (sc->sc_autopoll == flag)
return;

if (flag) {
pmu_send(sc, PMU_ADB_CMD, 4, cmd, 16, resp);
} else {
pmu_send(sc, PMU_ADB_POLL_OFF, 0, NULL, 16, resp);
}
sc->sc_autopoll = flag & 0xffff;
}

static int
pmu_adb_handler(void *cookie, int len, uint8_t *data)
{
struct pmu_softc *sc = cookie;
uint8_t resp[16];

if (sc->sc_adb_handler != NULL) {
sc->sc_adb_handler(sc->sc_adb_cookie, len, data);
/*
* the PMU will turn off autopolling after each LISTEN so we
* need to re-enable it here whenever we receive an ACK for a
* LISTEN command
*/
if ((data[1] & 0x0c) == 0x08) {
uint8_t cmd[] = {0, 0x86, (sc->sc_autopoll >> 8) & 0xff,
sc->sc_autopoll & 0xff};
pmu_send(sc, PMU_ADB_CMD, 4, cmd, 16, resp);
}
return 0;
}
return -1;
}

static int
pmu_adb_send(void *cookie, int poll, int command, int len, uint8_t *data)
{
struct pmu_softc *sc = cookie;
int i;
uint8_t packet[16], resp[16];

/* construct an ADB command packet and send it */
packet[0] = command;
packet[1] = 0;
packet[2] = len;
for (i = 0; i < len; i++)
packet[i + 3] = data[i];
(void)pmu_send(sc, PMU_ADB_CMD, len + 3, packet, 16, resp);

return 0;
}

static int
pmu_adb_set_handler(void *cookie, void (*handler)(void *, int, uint8_t *),
void *hcookie)
{
struct pmu_softc *sc = cookie;

/* register a callback for incoming ADB messages */
sc->sc_adb_handler = handler;
sc->sc_adb_cookie = hcookie;
return 0;
}

static int
pmu_i2c_exec(void *cookie, i2c_op_t op, i2c_addr_t addr, const void *_send,
size_t send_len, void *_recv, size_t recv_len, int flags)
{
struct pmu_softc *sc = cookie;
const uint8_t *send = _send;
uint8_t command[32] = {1, /* bus number */
PMU_I2C_MODE_SIMPLE,
0, /* bus2 */
addr,
0, /* sub address */
0, /* comb address */
0, /* count */
0 /* data */
};
uint8_t resp[16];
int len, rw;

rw = addr << 1;
command[3] = rw;
if (send_len > 0) {
command[6] = send_len;
memcpy(&command[7], send, send_len);
len = send_len + 7;
DPRINTF("pmu_i2c_exec(%02x, %d)\n", addr, send_len);

len = pmu_send(sc, PMU_I2C_CMD, len, command, 16, resp);
DPRINTF("resp(%d): %2x %2x\n", len, resp[0], resp[1]);

if (resp[1] != PMU_I2C_STATUS_OK) {
DPRINTF("%s: iic error %d\n", __func__, resp[1]);
return -1;
}
}
/* see if we're supposed to read */
if (I2C_OP_READ_P(op)) {
rw |= 1;
command[3] = rw;
command[6] = recv_len;
len = pmu_send(sc, PMU_I2C_CMD, 7, command, 16, resp);
DPRINTF("resp2(%d): %2x %2x\n", len, resp[0], resp[1]);

command[0] = 0;
len = pmu_send(sc, PMU_I2C_CMD, 1, command, 16, resp);
DPRINTF("resp3(%d): %2x %2x %2x\n", len, resp[0], resp[1],
resp[2]);
if ((len - 2) != recv_len) {
DPRINTF("%s: %s(%d) - got %d\n",
device_xname(sc->sc_dev),
__func__, recv_len, len - 2);
return -1;
}
memcpy(_recv, &resp[2], len - 2);
return 0;
};
return 0;
}

static void
pmu_eject_card(struct pmu_softc *sc, int socket)
{
uint8_t buf[] = {socket | 4};
uint8_t res[4];

atomic_and_32(&sc->sc_pending, ~socket);
pmu_send(sc, PMU_EJECT_PCMCIA, 1, buf, 4, res);
}

static void
pmu_update_brightness(struct pmu_softc *sc)
{
int val;
uint8_t cmd[2], resp[16];

if (sc->sc_brightness == sc->sc_brightness_wanted)
return;

if ((sc->sc_flags & PMU_HAS_BACKLIGHT_CONTROL) == 0) {

aprint_normal_dev(sc->sc_dev,
"this PMU doesn't support backlight control\n");
sc->sc_brightness = sc->sc_brightness_wanted;
return;
}

if (sc->sc_brightness_wanted == 0) {

/* turn backlight off completely */
cmd[0] = PMU_POW_OFF | PMU_POW_BACKLIGHT;
pmu_send(sc, PMU_POWER_CTRL, 1, cmd, 16, resp);
sc->sc_brightness = sc->sc_brightness_wanted;

/* don't bother with brightness */
return;
}

/* turn backlight on if needed */
if (sc->sc_brightness == 0) {
cmd[0] = PMU_POW_ON | PMU_POW_BACKLIGHT;
pmu_send(sc, PMU_POWER_CTRL, 1, cmd, 16, resp);
}

DPRINTF("pmu_update_brightness: %d -> %d\n", sc->sc_brightness,
sc->sc_brightness_wanted);

val = 0x7f - (sc->sc_brightness_wanted >> 1);
if (val < 0x08)
val = 0x08;
if (val > 0x78)
val = 0x78;
cmd[0] = val;
pmu_send(sc, PMU_SET_BRIGHTNESS, 1, cmd, 16, resp);

sc->sc_brightness = sc->sc_brightness_wanted;
}

static void
pmu_thread(void *cookie)
{
struct pmu_softc *sc = cookie;
//time_t time_bat = time_second;
int ticks = hz, i;

while (1) {
mutex_enter(&sc->sc_evmtx);
cv_timedwait(&sc->sc_event, &sc->sc_evmtx, ticks);
if ((sc->sc_pending & 3) != 0) {
DPRINTF("eject %d\n", sc->sc_pending & 3);
for (i = 1; i < 3; i++) {
if (i & sc->sc_pending)
pmu_eject_card(sc, i);
}
}
mutex_exit(&sc->sc_evmtx);
/* see if we need to update brightness */
if (sc->sc_brightness_wanted != sc->sc_brightness) {
pmu_update_brightness(sc);
}

/* see if we need to update audio volume */
if (sc->sc_volume_wanted != sc->sc_volume) {
#if 0
set_volume(sc->sc_volume_wanted);
#endif
sc->sc_volume = sc->sc_volume_wanted;
}

if (sc->sc_pending & PMU_EV_LID) {
atomic_and_32(&sc->sc_pending, ~PMU_EV_LID);
sysmon_pswitch_event(&sc->sc_lidswitch,
sc->sc_lid_closed ? PSWITCH_EVENT_PRESSED :
PSWITCH_EVENT_RELEASED);
}

if (sc->sc_pending & PMU_EV_BUTTON) {
atomic_and_32(&sc->sc_pending, ~PMU_EV_BUTTON);
sysmon_pswitch_event(&sc->sc_powerbutton,
sc->sc_button ? PSWITCH_EVENT_PRESSED :
PSWITCH_EVENT_RELEASED);
}

if (sc->sc_callback != NULL)
sc->sc_callback(sc->sc_cb_cookie);
}
}

static int
pmu_print(void *aux, const char *what)
{

return 0;
}

static void
pmu_attach_legacy_battery(struct pmu_softc *sc)
{
struct battery_attach_args baa;

baa.baa_type = BATTERY_TYPE_LEGACY;
baa.baa_pmu_ops = &sc->sc_pmu_ops;
config_found(sc->sc_dev, &baa, pmu_print,
CFARGS(.iattr = "pmu_bus"));
}

static void
pmu_attach_smart_battery(struct pmu_softc *sc, int num)
{
struct battery_attach_args baa;

baa.baa_type = BATTERY_TYPE_SMART;
baa.baa_pmu_ops = &sc->sc_pmu_ops;
baa.baa_num = num;
config_found(sc->sc_dev, &baa, pmu_print,
CFARGS(.iattr = "pmu_bus"));
}