1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/bus.h> 40 #include <sys/kernel.h> 41 #include <sys/module.h> 42 #include <sys/malloc.h> 43 #include <sys/rman.h> 44 #include <sys/timeet.h> 45 #include <sys/timetc.h> 46 #include <sys/watchdog.h> 47 48 #include <dev/ofw/openfirm.h> 49 #include <dev/ofw/ofw_bus.h> 50 #include <dev/ofw/ofw_bus_subr.h> 51 52 #include <machine/bus.h> 53 #include <machine/cpu.h> 54 #include <machine/intr.h> 55 56 #include <arm/freescale/vybrid/vf_port.h> 57 #include <arm/freescale/vybrid/vf_common.h> 58 59 /* Pin Control Register */ 60 #define PORT_PCR(n) (0x1000 * (n >> 5) + 0x4 * (n % 32)) 61 #define PCR_IRQC_S 16 62 #define PCR_IRQC_M 0xF 63 #define PCR_DMA_RE 0x1 64 #define PCR_DMA_FE 0x2 65 #define PCR_DMA_EE 0x3 66 #define PCR_INT_LZ 0x8 67 #define PCR_INT_RE 0x9 68 #define PCR_INT_FE 0xA 69 #define PCR_INT_EE 0xB 70 #define PCR_INT_LO 0xC 71 #define PCR_ISF (1 << 24) 72 #define PORT0_ISFR 0xA0 /* Interrupt Status Flag Register */ 73 #define PORT0_DFER 0xC0 /* Digital Filter Enable Register */ 74 #define PORT0_DFCR 0xC4 /* Digital Filter Clock Register */ 75 #define PORT0_DFWR 0xC8 /* Digital Filter Width Register */ 76 77 struct port_event { 78 uint32_t enabled; 79 uint32_t mux_num; 80 uint32_t mux_src; 81 uint32_t mux_chn; 82 void (*ih) (void *); 83 void *ih_user; 84 enum ev_type pevt; 85 }; 86 87 static struct port_event event_map[NGPIO]; 88 89 struct port_softc { 90 struct resource *res[6]; 91 bus_space_tag_t bst; 92 bus_space_handle_t bsh; 93 void *gpio_ih[NGPIO]; 94 }; 95 96 struct port_softc *port_sc; 97 98 static struct resource_spec port_spec[] = { 99 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 100 { SYS_RES_IRQ, 0, RF_ACTIVE }, 101 { SYS_RES_IRQ, 1, RF_ACTIVE }, 102 { SYS_RES_IRQ, 2, RF_ACTIVE }, 103 { SYS_RES_IRQ, 3, RF_ACTIVE }, 104 { SYS_RES_IRQ, 4, RF_ACTIVE }, 105 { -1, 0 } 106 }; 107 108 static int 109 port_intr(void *arg) 110 { 111 struct port_event *pev; 112 struct port_softc *sc; 113 int reg; 114 int i; 115 116 sc = arg; 117 118 for (i = 0; i < NGPIO; i++) { 119 reg = READ4(sc, PORT_PCR(i)); 120 if (reg & PCR_ISF) { 121 /* Clear interrupt */ 122 WRITE4(sc, PORT_PCR(i), reg); 123 124 /* Handle event */ 125 pev = &event_map[i]; 126 if (pev->enabled == 1) { 127 if (pev->ih != NULL) { 128 pev->ih(pev->ih_user); 129 } 130 } 131 } 132 } 133 134 return (FILTER_HANDLED); 135 } 136 137 int 138 port_setup(int pnum, enum ev_type pevt, void (*ih)(void *), void *ih_user) 139 { 140 struct port_event *pev; 141 struct port_softc *sc; 142 int reg; 143 int val; 144 145 sc = port_sc; 146 147 switch (pevt) { 148 case DMA_RISING_EDGE: 149 val = PCR_DMA_RE; 150 break; 151 case DMA_FALLING_EDGE: 152 val = PCR_DMA_FE; 153 break; 154 case DMA_EITHER_EDGE: 155 val = PCR_DMA_EE; 156 break; 157 case INT_LOGIC_ZERO: 158 val = PCR_INT_LZ; 159 break; 160 case INT_RISING_EDGE: 161 val = PCR_INT_RE; 162 break; 163 case INT_FALLING_EDGE: 164 val = PCR_INT_FE; 165 break; 166 case INT_EITHER_EDGE: 167 val = PCR_INT_EE; 168 break; 169 case INT_LOGIC_ONE: 170 val = PCR_INT_LO; 171 break; 172 default: 173 return (-1); 174 } 175 176 reg = READ4(sc, PORT_PCR(pnum)); 177 reg &= ~(PCR_IRQC_M << PCR_IRQC_S); 178 reg |= (val << PCR_IRQC_S); 179 WRITE4(sc, PORT_PCR(pnum), reg); 180 181 pev = &event_map[pnum]; 182 pev->ih = ih; 183 pev->ih_user = ih_user; 184 pev->pevt = pevt; 185 pev->enabled = 1; 186 187 return (0); 188 } 189 190 static int 191 port_probe(device_t dev) 192 { 193 194 if (!ofw_bus_status_okay(dev)) 195 return (ENXIO); 196 197 if (!ofw_bus_is_compatible(dev, "fsl,mvf600-port")) 198 return (ENXIO); 199 200 device_set_desc(dev, "Vybrid Family Port control and interrupts"); 201 return (BUS_PROBE_DEFAULT); 202 } 203 204 static int 205 port_attach(device_t dev) 206 { 207 struct port_softc *sc; 208 int irq; 209 210 sc = device_get_softc(dev); 211 212 if (bus_alloc_resources(dev, port_spec, sc->res)) { 213 device_printf(dev, "could not allocate resources\n"); 214 return (ENXIO); 215 } 216 217 /* Memory interface */ 218 sc->bst = rman_get_bustag(sc->res[0]); 219 sc->bsh = rman_get_bushandle(sc->res[0]); 220 221 port_sc = sc; 222 223 for (irq = 0; irq < NPORTS; irq ++) { 224 if ((bus_setup_intr(dev, sc->res[1 + irq], INTR_TYPE_MISC, 225 port_intr, NULL, sc, &sc->gpio_ih[irq]))) { 226 device_printf(dev, 227 "ERROR: Unable to register interrupt handler\n"); 228 return (ENXIO); 229 } 230 } 231 232 return (0); 233 } 234 235 static device_method_t port_methods[] = { 236 DEVMETHOD(device_probe, port_probe), 237 DEVMETHOD(device_attach, port_attach), 238 { 0, 0 } 239 }; 240 241 static driver_t port_driver = { 242 "port", 243 port_methods, 244 sizeof(struct port_softc), 245 }; 246 247 static devclass_t port_devclass; 248 249 DRIVER_MODULE(port, simplebus, port_driver, port_devclass, 0, 0); 250