af3dc4a7ca
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
251 lines
5.7 KiB
C
251 lines
5.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Vybrid Family Port control and interrupts (PORT)
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* Chapter 6, Vybrid Reference Manual, Rev. 5, 07/2013
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <sys/timeet.h>
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#include <sys/timetc.h>
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#include <sys/watchdog.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/intr.h>
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#include <arm/freescale/vybrid/vf_port.h>
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#include <arm/freescale/vybrid/vf_common.h>
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/* Pin Control Register */
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#define PORT_PCR(n) (0x1000 * (n >> 5) + 0x4 * (n % 32))
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#define PCR_IRQC_S 16
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#define PCR_IRQC_M 0xF
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#define PCR_DMA_RE 0x1
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#define PCR_DMA_FE 0x2
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#define PCR_DMA_EE 0x3
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#define PCR_INT_LZ 0x8
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#define PCR_INT_RE 0x9
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#define PCR_INT_FE 0xA
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#define PCR_INT_EE 0xB
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#define PCR_INT_LO 0xC
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#define PCR_ISF (1 << 24)
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#define PORT0_ISFR 0xA0 /* Interrupt Status Flag Register */
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#define PORT0_DFER 0xC0 /* Digital Filter Enable Register */
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#define PORT0_DFCR 0xC4 /* Digital Filter Clock Register */
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#define PORT0_DFWR 0xC8 /* Digital Filter Width Register */
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struct port_event {
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uint32_t enabled;
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uint32_t mux_num;
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uint32_t mux_src;
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uint32_t mux_chn;
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void (*ih) (void *);
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void *ih_user;
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enum ev_type pevt;
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};
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static struct port_event event_map[NGPIO];
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struct port_softc {
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struct resource *res[6];
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bus_space_tag_t bst;
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bus_space_handle_t bsh;
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void *gpio_ih[NGPIO];
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};
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struct port_softc *port_sc;
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static struct resource_spec port_spec[] = {
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{ SYS_RES_MEMORY, 0, RF_ACTIVE },
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{ SYS_RES_IRQ, 0, RF_ACTIVE },
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{ SYS_RES_IRQ, 1, RF_ACTIVE },
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{ SYS_RES_IRQ, 2, RF_ACTIVE },
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{ SYS_RES_IRQ, 3, RF_ACTIVE },
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{ SYS_RES_IRQ, 4, RF_ACTIVE },
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{ -1, 0 }
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};
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static int
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port_intr(void *arg)
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{
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struct port_event *pev;
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struct port_softc *sc;
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int reg;
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int i;
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sc = arg;
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for (i = 0; i < NGPIO; i++) {
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reg = READ4(sc, PORT_PCR(i));
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if (reg & PCR_ISF) {
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/* Clear interrupt */
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WRITE4(sc, PORT_PCR(i), reg);
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/* Handle event */
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pev = &event_map[i];
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if (pev->enabled == 1) {
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if (pev->ih != NULL) {
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pev->ih(pev->ih_user);
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}
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}
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}
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}
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return (FILTER_HANDLED);
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}
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int
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port_setup(int pnum, enum ev_type pevt, void (*ih)(void *), void *ih_user)
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{
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struct port_event *pev;
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struct port_softc *sc;
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int reg;
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int val;
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sc = port_sc;
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switch (pevt) {
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case DMA_RISING_EDGE:
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val = PCR_DMA_RE;
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break;
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case DMA_FALLING_EDGE:
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val = PCR_DMA_FE;
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break;
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case DMA_EITHER_EDGE:
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val = PCR_DMA_EE;
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break;
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case INT_LOGIC_ZERO:
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val = PCR_INT_LZ;
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break;
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case INT_RISING_EDGE:
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val = PCR_INT_RE;
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break;
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case INT_FALLING_EDGE:
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val = PCR_INT_FE;
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break;
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case INT_EITHER_EDGE:
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val = PCR_INT_EE;
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break;
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case INT_LOGIC_ONE:
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val = PCR_INT_LO;
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break;
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default:
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return (-1);
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}
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reg = READ4(sc, PORT_PCR(pnum));
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reg &= ~(PCR_IRQC_M << PCR_IRQC_S);
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reg |= (val << PCR_IRQC_S);
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WRITE4(sc, PORT_PCR(pnum), reg);
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pev = &event_map[pnum];
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pev->ih = ih;
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pev->ih_user = ih_user;
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pev->pevt = pevt;
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pev->enabled = 1;
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return (0);
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}
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static int
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port_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (!ofw_bus_is_compatible(dev, "fsl,mvf600-port"))
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return (ENXIO);
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device_set_desc(dev, "Vybrid Family Port control and interrupts");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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port_attach(device_t dev)
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{
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struct port_softc *sc;
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int irq;
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sc = device_get_softc(dev);
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if (bus_alloc_resources(dev, port_spec, sc->res)) {
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device_printf(dev, "could not allocate resources\n");
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return (ENXIO);
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}
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/* Memory interface */
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sc->bst = rman_get_bustag(sc->res[0]);
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sc->bsh = rman_get_bushandle(sc->res[0]);
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port_sc = sc;
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for (irq = 0; irq < NPORTS; irq ++) {
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if ((bus_setup_intr(dev, sc->res[1 + irq], INTR_TYPE_MISC,
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port_intr, NULL, sc, &sc->gpio_ih[irq]))) {
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device_printf(dev,
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"ERROR: Unable to register interrupt handler\n");
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return (ENXIO);
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}
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}
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return (0);
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}
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static device_method_t port_methods[] = {
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DEVMETHOD(device_probe, port_probe),
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DEVMETHOD(device_attach, port_attach),
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{ 0, 0 }
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};
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static driver_t port_driver = {
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"port",
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port_methods,
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sizeof(struct port_softc),
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};
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static devclass_t port_devclass;
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DRIVER_MODULE(port, simplebus, port_driver, port_devclass, 0, 0);
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