diff options
Diffstat (limited to 'sys/arm/nvidia/as3722.c')
-rw-r--r-- | sys/arm/nvidia/as3722.c | 411 |
1 files changed, 411 insertions, 0 deletions
diff --git a/sys/arm/nvidia/as3722.c b/sys/arm/nvidia/as3722.c new file mode 100644 index 0000000..3a03322 --- /dev/null +++ b/sys/arm/nvidia/as3722.c @@ -0,0 +1,411 @@ +/*- + * Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org> + * 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 AUTHOR 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 AUTHOR 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> +__FBSDID("$FreeBSD$"); + +/* + * AS3722 PMIC driver + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/gpio.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/malloc.h> +#include <sys/rman.h> +#include <sys/sx.h> + +#include <machine/bus.h> + +#include <dev/extres/regulator/regulator.h> +#include <dev/fdt/fdt_pinctrl.h> +#include <dev/gpio/gpiobusvar.h> +#include <dev/iicbus/iiconf.h> +#include <dev/iicbus/iicbus.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <gnu/dts/include/dt-bindings/mfd/as3722.h> + +#include "clock_if.h" +#include "regdev_if.h" + +#include "as3722.h" + +static struct ofw_compat_data compat_data[] = { + {"ams,as3722", 1}, + {NULL, 0}, +}; + +#define LOCK(_sc) sx_xlock(&(_sc)->lock) +#define UNLOCK(_sc) sx_xunlock(&(_sc)->lock) +#define LOCK_INIT(_sc) sx_init(&(_sc)->lock, "as3722") +#define LOCK_DESTROY(_sc) sx_destroy(&(_sc)->lock); +#define ASSERT_LOCKED(_sc) sx_assert(&(_sc)->lock, SA_XLOCKED); +#define ASSERT_UNLOCKED(_sc) sx_assert(&(_sc)->lock, SA_UNLOCKED); + +#define AS3722_DEVICE_ID 0x0C + +/* + * Raw register access function. + */ +int +as3722_read(struct as3722_softc *sc, uint8_t reg, uint8_t *val) +{ + uint8_t addr; + int rv; + struct iic_msg msgs[2] = { + {0, IIC_M_WR, 1, &addr}, + {0, IIC_M_RD, 1, val}, + }; + + msgs[0].slave = sc->bus_addr; + msgs[1].slave = sc->bus_addr; + addr = reg; + + rv = iicbus_transfer(sc->dev, msgs, 2); + if (rv != 0) { + device_printf(sc->dev, + "Error when reading reg 0x%02X, rv: %d\n", reg, rv); + return (EIO); + } + + return (0); +} + +int as3722_read_buf(struct as3722_softc *sc, uint8_t reg, uint8_t *buf, + size_t size) +{ + uint8_t addr; + int rv; + struct iic_msg msgs[2] = { + {0, IIC_M_WR, 1, &addr}, + {0, IIC_M_RD, size, buf}, + }; + + msgs[0].slave = sc->bus_addr; + msgs[1].slave = sc->bus_addr; + addr = reg; + + rv = iicbus_transfer(sc->dev, msgs, 2); + if (rv != 0) { + device_printf(sc->dev, + "Error when reading reg 0x%02X, rv: %d\n", reg, rv); + return (EIO); + } + + return (0); +} + +int +as3722_write(struct as3722_softc *sc, uint8_t reg, uint8_t val) +{ + uint8_t data[2]; + int rv; + + struct iic_msg msgs[1] = { + {0, IIC_M_WR, 2, data}, + }; + + msgs[0].slave = sc->bus_addr; + data[0] = reg; + data[1] = val; + + rv = iicbus_transfer(sc->dev, msgs, 1); + if (rv != 0) { + device_printf(sc->dev, + "Error when writing reg 0x%02X, rv: %d\n", reg, rv); + return (EIO); + } + return (0); +} + +int as3722_write_buf(struct as3722_softc *sc, uint8_t reg, uint8_t *buf, + size_t size) +{ + uint8_t data[1]; + int rv; + struct iic_msg msgs[2] = { + {0, IIC_M_WR, 1, data}, + {0, IIC_M_WR | IIC_M_NOSTART, size, buf}, + }; + + msgs[0].slave = sc->bus_addr; + msgs[1].slave = sc->bus_addr; + data[0] = reg; + + rv = iicbus_transfer(sc->dev, msgs, 2); + if (rv != 0) { + device_printf(sc->dev, + "Error when writing reg 0x%02X, rv: %d\n", reg, rv); + return (EIO); + } + return (0); +} + +int +as3722_modify(struct as3722_softc *sc, uint8_t reg, uint8_t clear, uint8_t set) +{ + uint8_t val; + int rv; + + rv = as3722_read(sc, reg, &val); + if (rv != 0) + return (rv); + + val &= ~clear; + val |= set; + + rv = as3722_write(sc, reg, val); + if (rv != 0) + return (rv); + + return (0); +} + +static int +as3722_get_version(struct as3722_softc *sc) +{ + uint8_t reg; + int rv; + + /* Verify AS3722 ID and version. */ + rv = RD1(sc, AS3722_ASIC_ID1, ®); + if (rv != 0) + return (ENXIO); + + if (reg != AS3722_DEVICE_ID) { + device_printf(sc->dev, "Invalid chip ID is 0x%x\n", reg); + return (ENXIO); + } + + rv = RD1(sc, AS3722_ASIC_ID2, &sc->chip_rev); + if (rv != 0) + return (ENXIO); + + if (bootverbose) + device_printf(sc->dev, "AS3722 rev: 0x%x\n", sc->chip_rev); + return (0); +} + +static int +as3722_init(struct as3722_softc *sc) +{ + uint32_t reg; + int rv; + + reg = 0; + if (sc->int_pullup) + reg |= AS3722_INT_PULL_UP; + if (sc->i2c_pullup) + reg |= AS3722_I2C_PULL_UP; + + rv = RM1(sc, AS3722_IO_VOLTAGE, + AS3722_INT_PULL_UP | AS3722_I2C_PULL_UP, reg); + if (rv != 0) + return (ENXIO); + + /* mask interrupts */ + rv = WR1(sc, AS3722_INTERRUPT_MASK1, 0); + if (rv != 0) + return (ENXIO); + rv = WR1(sc, AS3722_INTERRUPT_MASK2, 0); + if (rv != 0) + return (ENXIO); + rv = WR1(sc, AS3722_INTERRUPT_MASK3, 0); + if (rv != 0) + return (ENXIO); + rv = WR1(sc, AS3722_INTERRUPT_MASK4, 0); + if (rv != 0) + return (ENXIO); + return (0); +} + +static int +as3722_parse_fdt(struct as3722_softc *sc, phandle_t node) +{ + + sc->int_pullup = + OF_hasprop(node, "ams,enable-internal-int-pullup") ? 1 : 0; + sc->i2c_pullup = + OF_hasprop(node, "ams,enable-internal-i2c-pullup") ? 1 : 0; + return 0; +} + +static void +as3722_intr(void *arg) +{ + struct as3722_softc *sc; + + sc = (struct as3722_softc *)arg; + /* XXX Finish temperature alarms. */ +} + +static int +as3722_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data) + return (ENXIO); + + device_set_desc(dev, "AS3722 PMIC"); + return (BUS_PROBE_DEFAULT); +} + +static int +as3722_attach(device_t dev) +{ + struct as3722_softc *sc; + const char *dname; + int dunit, rv, rid; + phandle_t node; + + sc = device_get_softc(dev); + sc->dev = dev; + sc->bus_addr = iicbus_get_addr(dev); + node = ofw_bus_get_node(sc->dev); + dname = device_get_name(dev); + dunit = device_get_unit(dev); + rv = 0; + LOCK_INIT(sc); + + rid = 0; + sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, + RF_ACTIVE); + if (sc->irq_res == NULL) { + device_printf(dev, "Cannot allocate interrupt.\n"); + rv = ENXIO; + goto fail; + } + + rv = as3722_parse_fdt(sc, node); + if (rv != 0) + goto fail; + rv = as3722_get_version(sc); + if (rv != 0) + goto fail; + rv = as3722_init(sc); + if (rv != 0) + goto fail; + rv = as3722_regulator_attach(sc, node); + if (rv != 0) + goto fail; + rv = as3722_gpio_attach(sc, node); + if (rv != 0) + goto fail; + rv = as3722_rtc_attach(sc, node); + if (rv != 0) + goto fail; + + fdt_pinctrl_register(dev, NULL); + fdt_pinctrl_configure_by_name(dev, "default"); + + /* Setup interrupt. */ + rv = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE, + NULL, as3722_intr, sc, &sc->irq_h); + if (rv) { + device_printf(dev, "Cannot setup interrupt.\n"); + goto fail; + } + return (bus_generic_attach(dev)); + +fail: + if (sc->irq_h != NULL) + bus_teardown_intr(dev, sc->irq_res, sc->irq_h); + if (sc->irq_res != NULL) + bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res); + LOCK_DESTROY(sc); + return (rv); +} + +static int +as3722_detach(device_t dev) +{ + struct as3722_softc *sc; + + sc = device_get_softc(dev); + if (sc->irq_h != NULL) + bus_teardown_intr(dev, sc->irq_res, sc->irq_h); + if (sc->irq_res != NULL) + bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res); + LOCK_DESTROY(sc); + + return (bus_generic_detach(dev)); +} + +static phandle_t +as3722_gpio_get_node(device_t bus, device_t dev) +{ + + /* We only have one child, the GPIO bus, which needs our own node. */ + return (ofw_bus_get_node(bus)); +} + +static device_method_t as3722_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, as3722_probe), + DEVMETHOD(device_attach, as3722_attach), + DEVMETHOD(device_detach, as3722_detach), + + /* Regdev interface */ + DEVMETHOD(regdev_map, as3722_regulator_map), + + /* RTC interface */ + DEVMETHOD(clock_gettime, as3722_rtc_gettime), + DEVMETHOD(clock_settime, as3722_rtc_settime), + + /* GPIO protocol interface */ + DEVMETHOD(gpio_get_bus, as3722_gpio_get_bus), + DEVMETHOD(gpio_pin_max, as3722_gpio_pin_max), + DEVMETHOD(gpio_pin_getname, as3722_gpio_pin_getname), + DEVMETHOD(gpio_pin_getflags, as3722_gpio_pin_getflags), + DEVMETHOD(gpio_pin_getcaps, as3722_gpio_pin_getcaps), + DEVMETHOD(gpio_pin_setflags, as3722_gpio_pin_setflags), + DEVMETHOD(gpio_pin_get, as3722_gpio_pin_get), + DEVMETHOD(gpio_pin_set, as3722_gpio_pin_set), + DEVMETHOD(gpio_pin_toggle, as3722_gpio_pin_toggle), + DEVMETHOD(gpio_map_gpios, as3722_gpio_map_gpios), + + /* fdt_pinctrl interface */ + DEVMETHOD(fdt_pinctrl_configure, as3722_pinmux_configure), + + /* ofw_bus interface */ + DEVMETHOD(ofw_bus_get_node, as3722_gpio_get_node), + + DEVMETHOD_END +}; + +static devclass_t as3722_devclass; +DEFINE_CLASS_0(gpio, as3722_driver, as3722_methods, + sizeof(struct as3722_softc)); +EARLY_DRIVER_MODULE(as3722, iicbus, as3722_driver, as3722_devclass, + 0, 0, 74); |