2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2012 Damjan Marion <dmarion@Freebsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 * TI TPS65217 PMIC companion chip for AM335x SoC sitting on I2C bus
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/eventhandler.h>
37 #include <sys/kernel.h>
38 #include <sys/module.h>
39 #include <sys/clock.h>
43 #include <sys/reboot.h>
44 #include <sys/resource.h>
47 #include <dev/iicbus/iicbus.h>
48 #include <dev/iicbus/iiconf.h>
50 #include <dev/ofw/openfirm.h>
51 #include <dev/ofw/ofw_bus.h>
52 #include <dev/ofw/ofw_bus_subr.h>
54 #include <arm/ti/am335x/am335x_rtcvar.h>
55 #include <arm/ti/am335x/tps65217x.h>
57 #include "iicbus_if.h"
59 #define MAX_IIC_DATA_SIZE 2
62 struct am335x_pmic_softc {
65 struct intr_config_hook enum_hook;
66 struct resource *sc_irq_res;
70 static const char *tps65217_voreg_c[4] = {"4.10V", "4.15V", "4.20V", "4.25V"};
72 static int am335x_pmic_bootverbose = 0;
73 TUNABLE_INT("hw.am335x_pmic.bootverbose", &am335x_pmic_bootverbose);
74 static char am335x_pmic_vo[6];
75 TUNABLE_STR("hw.am335x_pmic.vo", am335x_pmic_vo, sizeof(am335x_pmic_vo));
77 static void am335x_pmic_shutdown(void *, int);
80 am335x_pmic_read(device_t dev, uint8_t addr, uint8_t *data, uint8_t size)
82 struct am335x_pmic_softc *sc = device_get_softc(dev);
83 struct iic_msg msg[] = {
84 { sc->sc_addr, IIC_M_WR, 1, &addr },
85 { sc->sc_addr, IIC_M_RD, size, data },
87 return (iicbus_transfer(dev, msg, 2));
91 am335x_pmic_write(device_t dev, uint8_t address, uint8_t *data, uint8_t size)
93 uint8_t buffer[MAX_IIC_DATA_SIZE + 1];
94 struct am335x_pmic_softc *sc = device_get_softc(dev);
95 struct iic_msg msg[] = {
96 { sc->sc_addr, IIC_M_WR, size + 1, buffer },
99 if (size > MAX_IIC_DATA_SIZE)
103 memcpy(buffer + 1, data, size);
105 return (iicbus_transfer(dev, msg, 1));
109 am335x_pmic_intr(void *arg)
111 struct am335x_pmic_softc *sc = (struct am335x_pmic_softc *)arg;
112 struct tps65217_status_reg status_reg;
113 struct tps65217_int_reg int_reg;
117 THREAD_SLEEPING_OK();
118 rv = am335x_pmic_read(sc->sc_dev, TPS65217_INT_REG, (uint8_t *)&int_reg, 1);
120 device_printf(sc->sc_dev, "Cannot read interrupt register\n");
121 THREAD_NO_SLEEPING();
124 rv = am335x_pmic_read(sc->sc_dev, TPS65217_STATUS_REG, (uint8_t *)&status_reg, 1);
126 device_printf(sc->sc_dev, "Cannot read status register\n");
127 THREAD_NO_SLEEPING();
130 THREAD_NO_SLEEPING();
132 if (int_reg.pbi && status_reg.pb)
133 shutdown_nice(RB_POWEROFF);
135 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x",
137 devctl_notify_f("ACPI", "ACAD", "power", notify_buf, M_NOWAIT);
142 am335x_pmic_probe(device_t dev)
144 struct am335x_pmic_softc *sc;
146 if (!ofw_bus_is_compatible(dev, "ti,tps65217"))
149 sc = device_get_softc(dev);
151 /* Convert to 8-bit addressing */
152 sc->sc_addr = iicbus_get_addr(dev);
154 device_set_desc(dev, "TI TPS65217 Power Management IC");
160 am335x_pmic_dump_chgconfig(device_t dev)
162 struct tps65217_chgconfig0_reg reg0;
163 struct tps65217_chgconfig1_reg reg1;
164 struct tps65217_chgconfig2_reg reg2;
165 struct tps65217_chgconfig3_reg reg3;
166 const char *e_d[] = {"enabled", "disabled"};
167 const char *d_e[] = {"disabled", "enabled"};
168 const char *i_a[] = {"inactive", "active"};
169 const char *f_t[] = {"false", "true"};
170 const char *timer_c[] = {"4h", "5h", "6h", "8h"};
171 const char *ntc_type_c[] = {"100k", "10k"};
172 const char *vprechg_c[] = {"2.9V", "2.5V"};
173 const char *trange_c[] = {"0-45 C", "0-60 C"};
174 const char *termif_c[] = {"2.5%", "7.5%", "15%", "18%"};
175 const char *pchrgt_c[] = {"30 min", "60 min"};
176 const char *dppmth_c[] = {"3.50V", "3.75V", "4.00V", "4.25V"};
177 const char *ichrg_c[] = {"300mA", "400mA", "500mA", "700mA"};
179 am335x_pmic_read(dev, TPS65217_CHGCONFIG0_REG, (uint8_t *)®0, 1);
180 device_printf(dev, " BAT TEMP/NTC ERROR: %s\n", f_t[reg0.battemp]);
181 device_printf(dev, " Pre-charge timer time-out: %s\n", f_t[reg0.pchgtout]);
182 device_printf(dev, " Charge timer time-out: %s\n", f_t[reg0.chgtout]);
183 device_printf(dev, " Charger active: %s\n", f_t[reg0.active]);
184 device_printf(dev, " Termination current detected: %s\n", f_t[reg0.termi]);
185 device_printf(dev, " Thermal suspend: %s\n", f_t[reg0.tsusp]);
186 device_printf(dev, " DPPM active: %s\n", f_t[reg0.dppm]);
187 device_printf(dev, " Thermal regulation: %s\n", i_a[reg0.treg]);
189 am335x_pmic_read(dev, TPS65217_CHGCONFIG1_REG, (uint8_t *)®1, 1);
190 device_printf(dev, " Charger: %s\n", d_e[reg1.chg_en]);
191 device_printf(dev, " Suspend charge: %s\n", i_a[reg1.susp]);
192 device_printf(dev, " Charge termination: %s\n", e_d[reg1.term]);
193 device_printf(dev, " Charger reset: %s\n", i_a[reg1.reset]);
194 device_printf(dev, " NTC TYPE: %s\n", ntc_type_c[reg1.ntc_type]);
195 device_printf(dev, " Safety timer: %s\n", d_e[reg1.tmr_en]);
196 device_printf(dev, " Charge safety timer: %s\n", timer_c[reg1.timer]);
198 am335x_pmic_read(dev, TPS65217_CHGCONFIG2_REG, (uint8_t *)®2, 1);
199 device_printf(dev, " Charge voltage: %s\n", tps65217_voreg_c[reg2.voreg]);
200 device_printf(dev, " Pre-charge to fast charge transition voltage: %s\n",
201 vprechg_c[reg2.vprechg]);
202 device_printf(dev, " Dynamic timer function: %s\n", d_e[reg2.dyntmr]);
204 am335x_pmic_read(dev, TPS65217_CHGCONFIG3_REG, (uint8_t *)®3, 1);
205 device_printf(dev, " Temperature range for charging: %s\n", trange_c[reg3.trange]);
206 device_printf(dev, " Termination current factor: %s\n", termif_c[reg3.termif]);
207 device_printf(dev, " Pre-charge time: %s\n", pchrgt_c[reg3.pchrgt]);
208 device_printf(dev, " Power path DPPM threshold: %s\n", dppmth_c[reg3.dppmth]);
209 device_printf(dev, " Charge current: %s\n", ichrg_c[reg3.ichrg]);
213 am335x_pmic_setvo(device_t dev, uint8_t vo)
215 struct tps65217_chgconfig2_reg reg2;
217 am335x_pmic_read(dev, TPS65217_CHGCONFIG2_REG, (uint8_t *)®2, 1);
219 am335x_pmic_write(dev, TPS65217_CHGCONFIG2_REG, (uint8_t *)®2, 1);
223 am335x_pmic_start(void *xdev)
225 struct am335x_pmic_softc *sc;
226 device_t dev = (device_t)xdev;
227 struct tps65217_status_reg status_reg;
228 struct tps65217_chipid_reg chipid_reg;
231 char pwr[4][11] = {"Battery", "USB", "AC", "USB and AC"};
234 sc = device_get_softc(dev);
236 am335x_pmic_read(dev, TPS65217_CHIPID_REG, (uint8_t *)&chipid_reg, 1);
237 switch (chipid_reg.chip) {
239 sprintf(name, "TPS65217A ver 1.%u", chipid_reg.rev);
242 sprintf(name, "TPS65217B ver 1.%u", chipid_reg.rev);
245 sprintf(name, "TPS65217C ver 1.%u", chipid_reg.rev);
248 sprintf(name, "TPS65217D ver 1.%u", chipid_reg.rev);
251 sprintf(name, "Unknown PMIC");
254 am335x_pmic_read(dev, TPS65217_STATUS_REG, (uint8_t *)&status_reg, 1);
255 device_printf(dev, "%s powered by %s\n", name,
256 pwr[status_reg.usbpwr | (status_reg.acpwr << 1)]);
258 if (am335x_pmic_vo[0] != '\0') {
259 for (vo = 0; vo < 4; vo++) {
260 if (strcmp(tps65217_voreg_c[vo], am335x_pmic_vo) == 0)
264 device_printf(dev, "WARNING: hw.am335x_pmic.vo=\"%s\""
265 ": unsupported value\n", am335x_pmic_vo);
267 am335x_pmic_setvo(dev, vo);
271 if (bootverbose || am335x_pmic_bootverbose) {
272 am335x_pmic_dump_chgconfig(dev);
275 EVENTHANDLER_REGISTER(shutdown_final, am335x_pmic_shutdown, dev,
278 config_intrhook_disestablish(&sc->enum_hook);
280 /* Unmask all interrupts and clear pending status */
282 am335x_pmic_write(dev, TPS65217_INT_REG, ®, 1);
283 am335x_pmic_read(dev, TPS65217_INT_REG, ®, 1);
285 if (sc->sc_irq_res != NULL) {
286 rv = bus_setup_intr(dev, sc->sc_irq_res,
287 INTR_TYPE_MISC | INTR_MPSAFE, NULL, am335x_pmic_intr,
288 sc, &sc->sc_intrhand);
291 "Unable to setup the irq handler.\n");
296 am335x_pmic_attach(device_t dev)
298 struct am335x_pmic_softc *sc;
301 sc = device_get_softc(dev);
304 sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
306 if (!sc->sc_irq_res) {
307 device_printf(dev, "cannot allocate interrupt\n");
308 /* return (ENXIO); */
311 sc->enum_hook.ich_func = am335x_pmic_start;
312 sc->enum_hook.ich_arg = dev;
314 if (config_intrhook_establish(&sc->enum_hook) != 0)
321 am335x_pmic_shutdown(void *xdev, int howto)
324 struct tps65217_status_reg reg;
326 if (!(howto & RB_POWEROFF))
328 dev = (device_t)xdev;
329 am335x_pmic_read(dev, TPS65217_STATUS_REG, (uint8_t *)®, 1);
330 /* Set the OFF bit on status register to start the shutdown sequence. */
332 am335x_pmic_write(dev, TPS65217_STATUS_REG, (uint8_t *)®, 1);
333 /* Toggle pmic_pwr_enable to shutdown the PMIC. */
334 am335x_rtc_pmic_pwr_toggle();
337 static device_method_t am335x_pmic_methods[] = {
338 DEVMETHOD(device_probe, am335x_pmic_probe),
339 DEVMETHOD(device_attach, am335x_pmic_attach),
343 static driver_t am335x_pmic_driver = {
346 sizeof(struct am335x_pmic_softc),
349 static devclass_t am335x_pmic_devclass;
351 DRIVER_MODULE(am335x_pmic, iicbus, am335x_pmic_driver, am335x_pmic_devclass, 0, 0);
352 MODULE_VERSION(am335x_pmic, 1);
353 MODULE_DEPEND(am335x_pmic, iicbus, 1, 1, 1);