Module Name: src Committed By: jmcneill Date: Sun Oct 27 15:31:15 UTC 2019
Modified Files: src/sys/dev/fdt: files.fdt Added Files: src/sys/dev/fdt: pinctrl_single.c Log Message: Add driver for one-register-per-pin type pinctrl devices. To generate a diff of this commit: cvs rdiff -u -r1.45 -r1.46 src/sys/dev/fdt/files.fdt cvs rdiff -u -r0 -r1.1 src/sys/dev/fdt/pinctrl_single.c Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.
Modified files: Index: src/sys/dev/fdt/files.fdt diff -u src/sys/dev/fdt/files.fdt:1.45 src/sys/dev/fdt/files.fdt:1.46 --- src/sys/dev/fdt/files.fdt:1.45 Tue Aug 13 16:46:49 2019 +++ src/sys/dev/fdt/files.fdt Sun Oct 27 15:31:15 2019 @@ -1,4 +1,4 @@ -# $NetBSD: files.fdt,v 1.45 2019/08/13 16:46:49 tnn Exp $ +# $NetBSD: files.fdt,v 1.46 2019/10/27 15:31:15 jmcneill Exp $ include "external/bsd/libfdt/conf/files.libfdt" @@ -82,6 +82,10 @@ device syscon { } : fdt attach syscon at fdt file dev/fdt/syscon.c syscon +device pinctrl +attach pinctrl at fdt with pinctrl_single +file dev/fdt/pinctrl_single.c pinctrl_single + device pwmbacklight attach pwmbacklight at fdt file dev/fdt/pwm_backlight.c pwmbacklight Added files: Index: src/sys/dev/fdt/pinctrl_single.c diff -u /dev/null src/sys/dev/fdt/pinctrl_single.c:1.1 --- /dev/null Sun Oct 27 15:31:15 2019 +++ src/sys/dev/fdt/pinctrl_single.c Sun Oct 27 15:31:15 2019 @@ -0,0 +1,204 @@ +/* $NetBSD: pinctrl_single.c,v 1.1 2019/10/27 15:31:15 jmcneill Exp $ */ + +/*- + * Copyright (c) 2019 Jared McNeill <jmcne...@invisible.ca> + * 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 ``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 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> +__KERNEL_RCSID(0, "$NetBSD: pinctrl_single.c,v 1.1 2019/10/27 15:31:15 jmcneill Exp $"); + +#include <sys/param.h> +#include <sys/bus.h> +#include <sys/device.h> +#include <sys/systm.h> +#include <sys/gpio.h> + +#include <dev/fdt/fdtvar.h> + +#define PINCTRL_FLAG_PINCONF __BIT(0) /* supports generic pinconf */ + +struct pinctrl_single_config { + uint32_t flags; +}; + +static const struct pinctrl_single_config pinctrl_config = { +}; + +static const struct pinctrl_single_config pinconf_config = { + .flags = PINCTRL_FLAG_PINCONF +}; + +static const struct of_compat_data compat_data[] = { + { "pinctrl-single", (uintptr_t)&pinctrl_config }, + { "pinconf-single", (uintptr_t)&pinconf_config }, + { NULL } +}; + +struct pinctrl_single_softc { + device_t sc_dev; + int sc_phandle; + bus_space_tag_t sc_bst; + bus_space_handle_t sc_bsh; + uint32_t sc_flags; + u_int sc_regwidth; + u_int sc_funcmask; +}; + +static void +pinctrl_single_pins_write(struct pinctrl_single_softc *sc, u_int off, u_int val) +{ + union { + uint32_t reg32; + uint16_t reg16; + uint8_t reg8; + } u; + + aprint_debug_dev(sc->sc_dev, "writing %#x with %#x\n", off, val); + + switch (sc->sc_regwidth) { + case 8: + u.reg8 = bus_space_read_1(sc->sc_bst, sc->sc_bsh, off); + u.reg8 &= ~sc->sc_funcmask; + u.reg8 |= val; + bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, u.reg8); + break; + case 16: + u.reg16 = bus_space_read_2(sc->sc_bst, sc->sc_bsh, off); + u.reg16 &= ~sc->sc_funcmask; + u.reg16 |= val; + bus_space_write_2(sc->sc_bst, sc->sc_bsh, off, u.reg16); + break; + case 32: + u.reg32 = bus_space_read_4(sc->sc_bst, sc->sc_bsh, off); + u.reg32 &= ~sc->sc_funcmask; + u.reg32 |= val; + bus_space_write_4(sc->sc_bst, sc->sc_bsh, off, u.reg32); + break; + default: + device_printf(sc->sc_dev, "%s: unsupported reg width %d\n", + __func__, sc->sc_regwidth); + break; + } +} + +static int +pinctrl_single_pins_set_config(device_t dev, const void *data, size_t len) +{ + struct pinctrl_single_softc * const sc = device_private(dev); + const u_int *pins; + int pinslen; + + if (len != 4) + return -1; + + const int phandle = fdtbus_get_phandle_from_native(be32dec(data)); + + pins = fdtbus_get_prop(phandle, "pinctrl-single,pins", &pinslen); + if (pins == NULL) + return -1; + + while (pinslen >= 8) { + const int off = be32toh(pins[0]); + const int val = be32toh(pins[1]); + + pinctrl_single_pins_write(sc, off, val); + pins += 2; + pinslen -= 8; + } + + return 0; +} + +static struct fdtbus_pinctrl_controller_func pinctrl_single_pins_funcs = { + .set_config = pinctrl_single_pins_set_config, +}; + +static int +pinctrl_single_match(device_t parent, cfdata_t cf, void *aux) +{ + struct fdt_attach_args * const faa = aux; + + return of_match_compat_data(faa->faa_phandle, compat_data); +} + +static void +pinctrl_single_attach(device_t parent, device_t self, void *aux) +{ + struct pinctrl_single_softc * const sc = device_private(self); + struct fdt_attach_args * const faa = aux; + const int phandle = faa->faa_phandle; + const struct pinctrl_single_config *conf; + bus_addr_t addr; + bus_size_t size; + int child; + + if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { + aprint_error(": couldn't get registers\n"); + return; + } + + conf = (const void *)of_search_compatible(phandle, compat_data)->data; + + sc->sc_dev = self; + sc->sc_phandle = phandle; + sc->sc_bst = faa->faa_bst; + if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) { + aprint_error(": couldn't map registers\n"); + return; + } + sc->sc_flags = conf->flags; + + if (of_getprop_uint32(phandle, "pinctrl-single,register-width", &sc->sc_regwidth) != 0) { + aprint_error(": missing 'pinctrl-single,register-width' property\n"); + return; + } + if (of_getprop_uint32(phandle, "pinctrl-single,function-mask", &sc->sc_funcmask) != 0) { + aprint_error(": missing 'pinctrl-single,function-mask' property\n"); + return; + } + + switch (sc->sc_regwidth) { + case 8: + case 16: + case 32: + break; + default: + aprint_error(": register width %d not supported\n", sc->sc_regwidth); + return; + } + + aprint_naive("\n"); + aprint_normal("\n"); + + for (child = OF_child(phandle); child; child = OF_peer(child)) { + if (of_hasprop(child, "pinctrl-single,pins")) + fdtbus_register_pinctrl_config(self, child, &pinctrl_single_pins_funcs); + } + + fdtbus_pinctrl_set_config(phandle, "default"); +} + +CFATTACH_DECL_NEW(pinctrl_single, sizeof(struct pinctrl_single_softc), + pinctrl_single_match, pinctrl_single_attach, NULL, NULL);