/* $OpenBSD: pca9532.c,v 1.3 2008/04/17 16:50:17 deraadt Exp $ */ /* * Copyright (c) 2006 Dale Rahn <drahn@openbsd.org> * * 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 <sys/param.h> #include <sys/systm.h> #include <sys/device.h> #include <sys/kernel.h> #include <sys/fcntl.h> #include <sys/uio.h> #include <sys/conf.h> #include <sys/gpio.h> #include <dev/i2c/i2cvar.h> #include <dev/gpio/gpiovar.h> #include "gpio.h" /* driver for PCA 9532 */ #define PCALED_ADDR 0x60 #define PCALED_GPIO_NPINS 16 struct pcaled_softc { struct device sc_dev; i2c_tag_t sc_tag; int sc_addr; struct gpio_chipset_tag sc_gpio_gc; struct gpio_pin sc_gpio_pin[PCALED_GPIO_NPINS]; }; int pcaled_match(struct device *, void *, void *); void pcaled_attach(struct device *, struct device *, void *); int pcaled_gpio_pin_read(void *arg, int pin); void pcaled_gpio_pin_write (void *arg, int pin, int value); void pcaled_gpio_pin_ctl (void *arg, int pin, int flags); struct cfattach pcaled_ca = { sizeof(struct pcaled_softc), pcaled_match, pcaled_attach }; struct cfdriver pcaled_cd = { NULL, "pcaled", DV_DULL }; int pcaled_match(struct device *parent, void *v, void *arg) { struct i2c_attach_args *ia = arg; int ok = 0; uint8_t cmd, data; if (ia->ia_addr != PCALED_ADDR) return (0); /* attempt to read input register 0 */ iic_acquire_bus(ia->ia_tag, I2C_F_POLL); cmd = 0; if (iic_exec(ia->ia_tag, I2C_OP_READ_WITH_STOP, ia->ia_addr, &cmd, sizeof cmd, &data, sizeof data, I2C_F_POLL)) goto fail; cmd = 9; if (iic_exec(ia->ia_tag, I2C_OP_READ_WITH_STOP, ia->ia_addr, &cmd, sizeof cmd, &data, sizeof data, I2C_F_POLL)) goto fail; ok = 1; fail: iic_release_bus(ia->ia_tag, I2C_F_POLL); return (ok); } void pcaled_attach(struct device *parent, struct device *self, void *arg) { struct pcaled_softc *sc = (void *)self; struct i2c_attach_args *ia = arg; struct gpiobus_attach_args gba; int i; uint8_t cmd, data; sc->sc_tag = ia->ia_tag; sc->sc_addr = ia->ia_addr; iic_acquire_bus(sc->sc_tag, I2C_F_POLL); for (i = 0; i < PCALED_GPIO_NPINS; i++) { sc->sc_gpio_pin[i].pin_num = i; sc->sc_gpio_pin[i].pin_caps = GPIO_PIN_INOUT; if (i < 8) cmd = 0; else cmd = 1; if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, I2C_F_POLL)) goto fail; /* XXX */ sc->sc_gpio_pin[i].pin_state = (data >> (i & 3)) & 1; } sc->sc_gpio_gc.gp_cookie = sc; sc->sc_gpio_gc.gp_pin_read = pcaled_gpio_pin_read; sc->sc_gpio_gc.gp_pin_write = pcaled_gpio_pin_write; sc->sc_gpio_gc.gp_pin_ctl = pcaled_gpio_pin_ctl; printf(": PCA9532 LED controller\n"); gba.gba_name = "gpio"; gba.gba_gc = &sc->sc_gpio_gc; gba.gba_pins = sc->sc_gpio_pin; gba.gba_npins = PCALED_GPIO_NPINS; #if NGPIO > 0 config_found(&sc->sc_dev, &gba, gpiobus_print); #endif fail: iic_release_bus(sc->sc_tag, I2C_F_POLL); } int pcaled_gpio_pin_read(void *arg, int pin) { struct pcaled_softc *sc = arg; iic_acquire_bus(sc->sc_tag, I2C_F_POLL); uint8_t cmd, data; if (pin < 8) cmd = 0; else cmd = 1; if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, I2C_F_POLL)) goto fail; /* XXX */ fail: iic_release_bus(sc->sc_tag, I2C_F_POLL); return (data >> (pin & 3)) & 1; } void pcaled_gpio_pin_write (void *arg, int pin, int value) { struct pcaled_softc *sc = arg; uint8_t cmd, data; if (pin < 4) cmd = 6; else if (pin < 8) cmd = 7; else if (pin < 12) cmd = 8; else cmd = 9; if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, I2C_F_POLL)) goto fail; /* XXX */ data &= ~(0x3 << (2*(pin & 3))); data |= (value << (2*(pin & 3))); if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, I2C_F_POLL)) goto fail; /* XXX */ fail: iic_release_bus(sc->sc_tag, I2C_F_POLL); } void pcaled_gpio_pin_ctl (void *arg, int pin, int flags) { /* XXX all pins are inout */ }