2 * Copyright (c) 2011 Justin Hibbits
3 * Copyright (c) 2010 Andreas Tobler
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * 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>
35 #include <sys/callout.h>
38 #include <sys/ctype.h>
39 #include <sys/kernel.h>
40 #include <sys/kthread.h>
41 #include <sys/limits.h>
42 #include <sys/reboot.h>
44 #include <sys/sysctl.h>
45 #include <sys/unistd.h>
47 #include <machine/bus.h>
48 #include <machine/md_var.h>
50 #include <dev/iicbus/iicbus.h>
51 #include <dev/iicbus/iiconf.h>
53 #include <dev/ofw/openfirm.h>
54 #include <dev/ofw/ofw_bus.h>
55 #include <powerpc/powermac/powermac_thermal.h>
57 struct adm1030_softc {
60 struct intr_config_hook enum_hook;
65 /* Regular bus attachment functions */
66 static int adm1030_probe(device_t);
67 static int adm1030_attach(device_t);
69 /* Utility functions */
70 static void adm1030_start(void *xdev);
71 static int adm1030_write_byte(device_t dev, uint32_t addr, uint8_t reg, uint8_t buf);
72 static int adm1030_set(struct adm1030_softc *fan, int pwm);
73 static int adm1030_sysctl(SYSCTL_HANDLER_ARGS);
75 static device_method_t adm1030_methods[] = {
76 /* Device interface */
77 DEVMETHOD(device_probe, adm1030_probe),
78 DEVMETHOD(device_attach, adm1030_attach),
82 static driver_t adm1030_driver = {
85 sizeof(struct adm1030_softc)
88 static devclass_t adm1030_devclass;
90 DRIVER_MODULE(adm1030, iicbus, adm1030_driver, adm1030_devclass, 0, 0);
93 adm1030_write_byte(device_t dev, uint32_t addr, uint8_t reg, uint8_t byte)
98 struct iic_msg msg[] = {
99 {addr, IIC_M_WR, 0, buf}
108 if (iicbus_transfer(dev, msg, 1) == 0)
112 device_printf(dev, "iicbus write failed\n");
115 pause("adm1030_write_byte", hz);
120 adm1030_probe(device_t dev)
122 const char *name, *compatible;
123 struct adm1030_softc *sc;
125 phandle_t thermostat;
127 name = ofw_bus_get_name(dev);
128 compatible = ofw_bus_get_compat(dev);
129 handle = ofw_bus_get_node(dev);
134 if (strcmp(name, "fan") != 0 || strcmp(compatible, "adm1030") != 0)
137 /* This driver can only be used if there's an associated temp sensor. */
138 if (OF_getprop(handle, "platform-getTemp", &thermostat, sizeof(thermostat)) < 0)
141 sc = device_get_softc(dev);
143 sc->sc_addr = iicbus_get_addr(dev);
145 device_set_desc(dev, "G4 MDD Fan driver");
151 adm1030_attach(device_t dev)
153 struct adm1030_softc *sc;
154 struct sysctl_ctx_list *ctx;
155 struct sysctl_oid *tree;
157 sc = device_get_softc(dev);
159 sc->enum_hook.ich_func = adm1030_start;
160 sc->enum_hook.ich_arg = dev;
163 * Wait until interrupts are available, which won't be until the openpic is
167 if (config_intrhook_establish(&sc->enum_hook) != 0)
170 ctx = device_get_sysctl_ctx(dev);
171 tree = device_get_sysctl_tree(dev);
172 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "pwm",
173 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, dev,
174 0, adm1030_sysctl, "I", "Fan PWM Rate");
180 adm1030_start(void *xdev)
182 struct adm1030_softc *sc;
184 device_t dev = (device_t) xdev;
186 sc = device_get_softc(dev);
188 /* Start the adm1030 device. */
189 adm1030_write_byte(sc->sc_dev, sc->sc_addr, 0x1, 0x1);
190 adm1030_write_byte(sc->sc_dev, sc->sc_addr, 0x0, 0x95);
191 adm1030_write_byte(sc->sc_dev, sc->sc_addr, 0x23, 0x91);
193 /* Use the RPM fields as PWM duty cycles. */
195 sc->fan.max_rpm = 0x0F;
196 sc->fan.default_rpm = 2;
198 strcpy(sc->fan.name, "MDD Case fan");
201 sc->fan.set = (int (*)(struct pmac_fan *, int))adm1030_set;
202 config_intrhook_disestablish(&sc->enum_hook);
204 pmac_thermal_fan_register(&sc->fan);
207 static int adm1030_set(struct adm1030_softc *fan, int pwm)
209 /* Clamp the PWM to 0-0xF, one nibble. */
215 if (adm1030_write_byte(fan->sc_dev, fan->sc_addr, 0x22, pwm) < 0)
223 adm1030_sysctl(SYSCTL_HANDLER_ARGS)
226 struct adm1030_softc *sc;
230 sc = device_get_softc(adm1030);
234 error = sysctl_handle_int(oidp, &pwm, 0, req);
236 if (error || !req->newptr)
239 return (adm1030_set(sc, pwm));