/* $OpenBSD: fanpwr.c,v 1.3 2019/05/24 18:54:12 kettenis Exp $ */ /* * Copyright (c) 2018 Mark Kettenis * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #include /* Registers */ #define FAN53555_VSEL0 0x00 #define FAN53555_VSEL1 0x01 #define FAN53555_VSEL_NSEL_MASK 0x3f #define FAN53555_CONTROL 0x02 #define FAN53555_CONTROL_SLEW_MASK (0x7 << 4) #define FAN53555_CONTROL_SLEW_SHIFT 4 #define FAN53555_ID1 0x03 #define FAN53555_ID2 0x04 /* Distinguish between Failrchild original and Silergy clones. */ enum fanpwr_id { FANPWR_FAN53555, /* Fairchild FAN53555 */ FANPWR_SYR827, /* Silergy SYR827 */ FANPWR_SYR828 /* Silergy SYR828 */ }; struct fanpwr_softc { struct device sc_dev; i2c_tag_t sc_tag; i2c_addr_t sc_addr; enum fanpwr_id sc_id; uint8_t sc_vsel; struct regulator_device sc_rd; uint32_t sc_vbase; uint32_t sc_vstep; }; int fanpwr_match(struct device *, void *, void *); void fanpwr_attach(struct device *, struct device *, void *); struct cfattach fanpwr_ca = { sizeof(struct fanpwr_softc), fanpwr_match, fanpwr_attach }; struct cfdriver fanpwr_cd = { NULL, "fanpwr", DV_DULL }; uint8_t fanpwr_read(struct fanpwr_softc *, int); void fanpwr_write(struct fanpwr_softc *, int, uint8_t); uint32_t fanpwr_get_voltage(void *); int fanpwr_set_voltage(void *, uint32_t); int fanpwr_match(struct device *parent, void *match, void *aux) { struct i2c_attach_args *ia = aux; int node = *(int *)ia->ia_cookie; return (OF_is_compatible(node, "fcs,fan53555") || OF_is_compatible(node, "silergy,syr827") || OF_is_compatible(node, "silergy,syr828")); } void fanpwr_attach(struct device *parent, struct device *self, void *aux) { struct fanpwr_softc *sc = (struct fanpwr_softc *)self; struct i2c_attach_args *ia = aux; int node = *(int *)ia->ia_cookie; uint32_t voltage, ramp_delay; uint8_t id1, id2; pinctrl_byname(node, "default"); sc->sc_tag = ia->ia_tag; sc->sc_addr = ia->ia_addr; if (OF_getpropint(node, "fcs,suspend-voltage-selector", 0)) sc->sc_vsel = FAN53555_VSEL0; else sc->sc_vsel = FAN53555_VSEL1; if (OF_is_compatible(node, "silergy,syr827")) { printf(": SYR827"); sc->sc_id = FANPWR_SYR827; } else if (OF_is_compatible(node, "silergy,syr828")) { printf(": SYR828"); sc->sc_id = FANPWR_SYR828; } else { printf(": FAN53555"); sc->sc_id = FANPWR_FAN53555; } id1 = fanpwr_read(sc, FAN53555_ID1); id2 = fanpwr_read(sc, FAN53555_ID2); switch (sc->sc_id) { case FANPWR_FAN53555: switch (id1 << 8 | id2) { case 0x8003: /* 00 Option */ case 0x8103: /* 01 Option */ case 0x8303: /* 03 Option */ case 0x8503: /* 05 Option */ case 0x8801: /* 08, 18 Options */ case 0x880f: /* BUC08, BUC18 Options */ case 0x8108: /* 79 Option */ sc->sc_vbase = 600000; sc->sc_vstep = 10000; break; case 0x840f: /* 04 Option */ case 0x8c0f: /* 09 Option */ sc->sc_vbase = 603000; sc->sc_vstep = 12826; break; case 0x800f: /* 13 Option */ sc->sc_vbase = 800000; sc->sc_vstep = 10000; break; case 0x800c: /* 23 Option */ sc->sc_vbase = 600000; sc->sc_vstep = 12500; break; case 0x8004: /* 24 Option */ sc->sc_vbase = 603000; sc->sc_vstep = 12967; break; default: printf(", unknown ID1 0x%02x ID2 0x%02x\n", id1, id2); return; } break; case FANPWR_SYR827: case FANPWR_SYR828: sc->sc_vbase = 712500; sc->sc_vstep = 12500; break; } voltage = fanpwr_get_voltage(sc); printf(", %d.%02d VDC", voltage / 1000000, (voltage % 1000000) / 10000); ramp_delay = OF_getpropint(node, "regulator-ramp-delay", 0); if (ramp_delay > 0) { uint8_t ctrl, slew; for (slew = 7; slew > 0; slew--) if ((64000 >> slew) >= ramp_delay) break; ctrl = fanpwr_read(sc, FAN53555_CONTROL); ctrl &= ~FAN53555_CONTROL_SLEW_MASK; ctrl |= slew << FAN53555_CONTROL_SLEW_SHIFT; fanpwr_write(sc, FAN53555_CONTROL, ctrl); } sc->sc_rd.rd_node = node; sc->sc_rd.rd_cookie = sc; sc->sc_rd.rd_get_voltage = fanpwr_get_voltage; sc->sc_rd.rd_set_voltage = fanpwr_set_voltage; regulator_register(&sc->sc_rd); printf("\n"); } uint8_t fanpwr_read(struct fanpwr_softc *sc, int reg) { uint8_t cmd = reg; uint8_t val; int error; iic_acquire_bus(sc->sc_tag, I2C_F_POLL); error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, &cmd, sizeof cmd, &val, sizeof val, I2C_F_POLL); iic_release_bus(sc->sc_tag, I2C_F_POLL); if (error) { printf("error %d\n", error); printf("%s: can't read register 0x%02x\n", sc->sc_dev.dv_xname, reg); val = 0xff; } return val; } void fanpwr_write(struct fanpwr_softc *sc, int reg, uint8_t val) { uint8_t cmd = reg; int error; iic_acquire_bus(sc->sc_tag, I2C_F_POLL); error = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, &cmd, sizeof cmd, &val, sizeof val, I2C_F_POLL); iic_release_bus(sc->sc_tag, I2C_F_POLL); if (error) { printf("%s: can't write register 0x%02x\n", sc->sc_dev.dv_xname, reg); } } uint32_t fanpwr_get_voltage(void *cookie) { struct fanpwr_softc *sc = cookie; uint8_t vsel; vsel = fanpwr_read(sc, sc->sc_vsel); return sc->sc_vbase + (vsel & FAN53555_VSEL_NSEL_MASK) * sc->sc_vstep; } int fanpwr_set_voltage(void *cookie, uint32_t voltage) { struct fanpwr_softc *sc = cookie; uint32_t vmin = sc->sc_vbase; uint32_t vmax = vmin + FAN53555_VSEL_NSEL_MASK * sc->sc_vstep; uint8_t vsel; if (voltage < vmin || voltage > vmax) return EINVAL; vsel = fanpwr_read(sc, sc->sc_vsel); vsel &= ~FAN53555_VSEL_NSEL_MASK; vsel |= (voltage - sc->sc_vbase) / sc->sc_vstep; fanpwr_write(sc, sc->sc_vsel, vsel); return 0; }