diff options
Diffstat (limited to 'sys/arm/freescale/imx/imx6_iomux.c')
| -rw-r--r-- | sys/arm/freescale/imx/imx6_iomux.c | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/sys/arm/freescale/imx/imx6_iomux.c b/sys/arm/freescale/imx/imx6_iomux.c deleted file mode 100644 index b15e503..0000000 --- a/sys/arm/freescale/imx/imx6_iomux.c +++ /dev/null @@ -1,225 +0,0 @@ -/*- - * Copyright (c) 2014 Boris Samorodov <bsam@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. - * - * $FreeBSD$ - */ - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/bus.h> -#include <sys/kernel.h> -#include <sys/module.h> -#include <sys/malloc.h> -#include <sys/rman.h> - -#include <machine/bus.h> -#include <machine/fdt.h> - -#include <dev/fdt/fdt_common.h> -#include <dev/ofw/openfirm.h> -#include <dev/ofw/ofw_bus.h> -#include <dev/ofw/ofw_bus_subr.h> - -#include <arm/freescale/imx/imx_iomuxvar.h> -#include "imx6_iomuxreg.h" - -#define IOMUX_WRITE(_sc, _r, _v) \ - bus_write_4((_sc)->sc_res, (_r), (_v)) -#define IOMUX_READ(_sc, _r) \ - bus_read_4((_sc)->sc_res, (_r)) -#define IOMUX_SET(_sc, _r, _m) \ - IOMUX_WRITE((_sc), (_r), IOMUX_READ((_sc), (_r)) | (_m)) -#define IOMUX_CLEAR(_sc, _r, _m) \ - IOMUX_WRITE((_sc), (_r), IOMUX_READ((_sc), (_r)) & ~(_m)) - -struct imx6_iomux_softc { - struct resource *sc_res; - device_t sc_dev; -}; - -static struct imx6_iomux_softc *iomuxsc = NULL; - -static struct resource_spec imx6_iomux_spec[] = { - { SYS_RES_MEMORY, 0, RF_ACTIVE }, - { SYS_RES_IRQ, 0, RF_ACTIVE }, - { -1, 0 } -}; - -static int -imx6_iomux_probe(device_t dev) -{ - if (!ofw_bus_status_okay(dev)) - return (ENXIO); - - if (!ofw_bus_is_compatible(dev, "fsl,imx6-iomux")) - return (ENXIO); - - device_set_desc(dev, "Freescale i.MX6 IO pins multiplexor"); - return (BUS_PROBE_DEFAULT); - -} - -static int -imx6_iomux_attach(device_t dev) -{ - struct imx6_iomux_softc * sc; - - sc = device_get_softc(dev); - - if (bus_alloc_resources(dev, imx6_iomux_spec, &sc->sc_res)) { - device_printf(dev, "could not allocate resources\n"); - return (ENXIO); - } - - iomuxsc = sc; - - /* - * XXX: place to fetch all info about pinmuxing from loader data - * (FDT blob) and apply. Loader (1st one) must care about - * device-to-device difference. - */ - - return (0); -} - -static int -imx6_iomux_detach(device_t dev) -{ - - /* IOMUX registers are always accessible. */ - return (EBUSY); -} - -static void -iomux_set_pad_sub(struct imx6_iomux_softc *sc, uint32_t pin, uint32_t config) -{ - bus_size_t pad_ctl_reg = IOMUX_PIN_TO_PAD_ADDRESS(pin); - - if (pad_ctl_reg != IOMUX_PAD_NONE) - IOMUX_WRITE(sc, pad_ctl_reg, config); -} - -void -iomux_set_pad(unsigned int pin, unsigned int config) -{ - - if (iomuxsc == NULL) - return; - iomux_set_pad_sub(iomuxsc, pin, config); -} - -static void -iomux_set_function_sub(struct imx6_iomux_softc *sc, uint32_t pin, uint32_t fn) -{ - bus_size_t mux_ctl_reg = IOMUX_PIN_TO_MUX_ADDRESS(pin); - - if (mux_ctl_reg != IOMUX_MUX_NONE) - IOMUX_WRITE(sc, mux_ctl_reg, fn); -} - -void -iomux_set_function(unsigned int pin, unsigned int fn) -{ - - if (iomuxsc == NULL) - return; - iomux_set_function_sub(iomuxsc, pin, fn); -} - -static uint32_t -iomux_get_pad_config_sub(struct imx6_iomux_softc *sc, uint32_t pin) -{ - bus_size_t pad_reg = IOMUX_PIN_TO_PAD_ADDRESS(pin); - uint32_t result; - - result = IOMUX_READ(sc, pad_reg); - - return(result); -} - -unsigned int -iomux_get_pad_config(unsigned int pin) -{ - - return(iomux_get_pad_config_sub(iomuxsc, pin)); -} - - -uint32_t -imx_iomux_gpr_get(u_int regnum) -{ - - KASSERT(iomuxsc != NULL, ("imx_iomux_gpr_get() called before attach")); - KASSERT(regnum >= 0 && regnum <= 13, - ("imx_iomux_gpr_get bad regnum %u", regnum)); - return (IOMUX_READ(iomuxsc, IOMUXC_GPR0 + regnum)); -} - -void -imx_iomux_gpr_set(u_int regnum, uint32_t val) -{ - - KASSERT(iomuxsc != NULL, ("imx_iomux_gpr_set() called before attach")); - KASSERT(regnum >= 0 && regnum <= 13, - ("imx_iomux_gpr_set bad regnum %u", regnum)); - IOMUX_WRITE(iomuxsc, IOMUXC_GPR0 + regnum, val); -} - -void -imx_iomux_gpr_set_masked(u_int regnum, uint32_t clrbits, uint32_t setbits) -{ - uint32_t val; - - KASSERT(iomuxsc != NULL, - ("imx_iomux_gpr_set_masked called before attach")); - KASSERT(regnum >= 0 && regnum <= 13, - ("imx_iomux_gpr_set_masked bad regnum %u", regnum)); - - val = IOMUX_READ(iomuxsc, IOMUXC_GPR0 + regnum); - val = (val & ~clrbits) | setbits; - IOMUX_WRITE(iomuxsc, IOMUXC_GPR0 + regnum, val); -} - -static device_method_t imx6_iomux_methods[] = { - /* Device interface */ - DEVMETHOD(device_probe, imx6_iomux_probe), - DEVMETHOD(device_attach, imx6_iomux_attach), - DEVMETHOD(device_detach, imx6_iomux_detach), - - DEVMETHOD_END -}; - -static driver_t imx6_iomux_driver = { - "imx6_iomux", - imx6_iomux_methods, - sizeof(struct imx6_iomux_softc), -}; - -static devclass_t imx6_iomux_devclass; - -EARLY_DRIVER_MODULE(imx6_iomux, simplebus, imx6_iomux_driver, - imx6_iomux_devclass, 0, 0, BUS_PASS_CPU + BUS_PASS_ORDER_LATE); - - |
