1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29/* 30 * Vybrid Family Port control and interrupts (PORT) 31 * Chapter 6, Vybrid Reference Manual, Rev. 5, 07/2013 32 */ 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/bus.h> 37#include <sys/kernel.h> 38#include <sys/module.h> 39#include <sys/malloc.h> 40#include <sys/rman.h> 41#include <sys/timeet.h> 42#include <sys/timetc.h> 43#include <sys/watchdog.h> 44 45#include <dev/ofw/openfirm.h> 46#include <dev/ofw/ofw_bus.h> 47#include <dev/ofw/ofw_bus_subr.h> 48 49#include <machine/bus.h> 50#include <machine/cpu.h> 51#include <machine/intr.h> 52 53#include <arm/freescale/vybrid/vf_port.h> 54#include <arm/freescale/vybrid/vf_common.h> 55 56/* Pin Control Register */ 57#define PORT_PCR(n) (0x1000 * (n >> 5) + 0x4 * (n % 32)) 58#define PCR_IRQC_S 16 59#define PCR_IRQC_M 0xF 60#define PCR_DMA_RE 0x1 61#define PCR_DMA_FE 0x2 62#define PCR_DMA_EE 0x3 63#define PCR_INT_LZ 0x8 64#define PCR_INT_RE 0x9 65#define PCR_INT_FE 0xA 66#define PCR_INT_EE 0xB 67#define PCR_INT_LO 0xC 68#define PCR_ISF (1 << 24) 69#define PORT0_ISFR 0xA0 /* Interrupt Status Flag Register */ 70#define PORT0_DFER 0xC0 /* Digital Filter Enable Register */ 71#define PORT0_DFCR 0xC4 /* Digital Filter Clock Register */ 72#define PORT0_DFWR 0xC8 /* Digital Filter Width Register */ 73 74struct port_event { 75 uint32_t enabled; 76 uint32_t mux_num; 77 uint32_t mux_src; 78 uint32_t mux_chn; 79 void (*ih) (void *); 80 void *ih_user; 81 enum ev_type pevt; 82}; 83 84static struct port_event event_map[NGPIO]; 85 86struct port_softc { 87 struct resource *res[6]; 88 bus_space_tag_t bst; 89 bus_space_handle_t bsh; 90 void *gpio_ih[NGPIO]; 91}; 92 93struct port_softc *port_sc; 94 95static struct resource_spec port_spec[] = { 96 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 97 { SYS_RES_IRQ, 0, RF_ACTIVE }, 98 { SYS_RES_IRQ, 1, RF_ACTIVE }, 99 { SYS_RES_IRQ, 2, RF_ACTIVE }, 100 { SYS_RES_IRQ, 3, RF_ACTIVE }, 101 { SYS_RES_IRQ, 4, RF_ACTIVE }, 102 { -1, 0 } 103}; 104 105static int 106port_intr(void *arg) 107{ 108 struct port_event *pev; 109 struct port_softc *sc; 110 int reg; 111 int i; 112 113 sc = arg; 114 115 for (i = 0; i < NGPIO; i++) { 116 reg = READ4(sc, PORT_PCR(i)); 117 if (reg & PCR_ISF) { 118 /* Clear interrupt */ 119 WRITE4(sc, PORT_PCR(i), reg); 120 121 /* Handle event */ 122 pev = &event_map[i]; 123 if (pev->enabled == 1) { 124 if (pev->ih != NULL) { 125 pev->ih(pev->ih_user); 126 } 127 } 128 } 129 } 130 131 return (FILTER_HANDLED); 132} 133 134int 135port_setup(int pnum, enum ev_type pevt, void (*ih)(void *), void *ih_user) 136{ 137 struct port_event *pev; 138 struct port_softc *sc; 139 int reg; 140 int val; 141 142 sc = port_sc; 143 144 switch (pevt) { 145 case DMA_RISING_EDGE: 146 val = PCR_DMA_RE; 147 break; 148 case DMA_FALLING_EDGE: 149 val = PCR_DMA_FE; 150 break; 151 case DMA_EITHER_EDGE: 152 val = PCR_DMA_EE; 153 break; 154 case INT_LOGIC_ZERO: 155 val = PCR_INT_LZ; 156 break; 157 case INT_RISING_EDGE: 158 val = PCR_INT_RE; 159 break; 160 case INT_FALLING_EDGE: 161 val = PCR_INT_FE; 162 break; 163 case INT_EITHER_EDGE: 164 val = PCR_INT_EE; 165 break; 166 case INT_LOGIC_ONE: 167 val = PCR_INT_LO; 168 break; 169 default: 170 return (-1); 171 } 172 173 reg = READ4(sc, PORT_PCR(pnum)); 174 reg &= ~(PCR_IRQC_M << PCR_IRQC_S); 175 reg |= (val << PCR_IRQC_S); 176 WRITE4(sc, PORT_PCR(pnum), reg); 177 178 pev = &event_map[pnum]; 179 pev->ih = ih; 180 pev->ih_user = ih_user; 181 pev->pevt = pevt; 182 pev->enabled = 1; 183 184 return (0); 185} 186 187static int 188port_probe(device_t dev) 189{ 190 191 if (!ofw_bus_status_okay(dev)) 192 return (ENXIO); 193 194 if (!ofw_bus_is_compatible(dev, "fsl,mvf600-port")) 195 return (ENXIO); 196 197 device_set_desc(dev, "Vybrid Family Port control and interrupts"); 198 return (BUS_PROBE_DEFAULT); 199} 200 201static int 202port_attach(device_t dev) 203{ 204 struct port_softc *sc; 205 int irq; 206 207 sc = device_get_softc(dev); 208 209 if (bus_alloc_resources(dev, port_spec, sc->res)) { 210 device_printf(dev, "could not allocate resources\n"); 211 return (ENXIO); 212 } 213 214 /* Memory interface */ 215 sc->bst = rman_get_bustag(sc->res[0]); 216 sc->bsh = rman_get_bushandle(sc->res[0]); 217 218 port_sc = sc; 219 220 for (irq = 0; irq < NPORTS; irq ++) { 221 if ((bus_setup_intr(dev, sc->res[1 + irq], INTR_TYPE_MISC, 222 port_intr, NULL, sc, &sc->gpio_ih[irq]))) { 223 device_printf(dev, 224 "ERROR: Unable to register interrupt handler\n"); 225 return (ENXIO); 226 } 227 } 228 229 return (0); 230} 231 232static device_method_t port_methods[] = { 233 DEVMETHOD(device_probe, port_probe), 234 DEVMETHOD(device_attach, port_attach), 235 { 0, 0 } 236}; 237 238static driver_t port_driver = { 239 "port", 240 port_methods, 241 sizeof(struct port_softc), 242}; 243 244DRIVER_MODULE(port, simplebus, port_driver, 0, 0); 245