1 /*- 2 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * Vybrid Family Port control and interrupts (PORT) 29 * Chapter 6, Vybrid Reference Manual, Rev. 5, 07/2013 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/bus.h> 38 #include <sys/kernel.h> 39 #include <sys/module.h> 40 #include <sys/malloc.h> 41 #include <sys/rman.h> 42 #include <sys/timeet.h> 43 #include <sys/timetc.h> 44 #include <sys/watchdog.h> 45 46 #include <dev/ofw/openfirm.h> 47 #include <dev/ofw/ofw_bus.h> 48 #include <dev/ofw/ofw_bus_subr.h> 49 50 #include <machine/bus.h> 51 #include <machine/cpu.h> 52 #include <machine/intr.h> 53 54 #include <arm/freescale/vybrid/vf_port.h> 55 #include <arm/freescale/vybrid/vf_common.h> 56 57 /* Pin Control Register */ 58 #define PORT_PCR(n) (0x1000 * (n >> 5) + 0x4 * (n % 32)) 59 #define PCR_IRQC_S 16 60 #define PCR_IRQC_M 0xF 61 #define PCR_DMA_RE 0x1 62 #define PCR_DMA_FE 0x2 63 #define PCR_DMA_EE 0x3 64 #define PCR_INT_LZ 0x8 65 #define PCR_INT_RE 0x9 66 #define PCR_INT_FE 0xA 67 #define PCR_INT_EE 0xB 68 #define PCR_INT_LO 0xC 69 #define PCR_ISF (1 << 24) 70 #define PORT0_ISFR 0xA0 /* Interrupt Status Flag Register */ 71 #define PORT0_DFER 0xC0 /* Digital Filter Enable Register */ 72 #define PORT0_DFCR 0xC4 /* Digital Filter Clock Register */ 73 #define PORT0_DFWR 0xC8 /* Digital Filter Width Register */ 74 75 struct port_event { 76 uint32_t enabled; 77 uint32_t mux_num; 78 uint32_t mux_src; 79 uint32_t mux_chn; 80 void (*ih) (void *); 81 void *ih_user; 82 enum ev_type pevt; 83 }; 84 85 static struct port_event event_map[NGPIO]; 86 87 struct port_softc { 88 struct resource *res[6]; 89 bus_space_tag_t bst; 90 bus_space_handle_t bsh; 91 void *gpio_ih[NGPIO]; 92 }; 93 94 struct port_softc *port_sc; 95 96 static struct resource_spec port_spec[] = { 97 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 98 { SYS_RES_IRQ, 0, RF_ACTIVE }, 99 { SYS_RES_IRQ, 1, RF_ACTIVE }, 100 { SYS_RES_IRQ, 2, RF_ACTIVE }, 101 { SYS_RES_IRQ, 3, RF_ACTIVE }, 102 { SYS_RES_IRQ, 4, RF_ACTIVE }, 103 { -1, 0 } 104 }; 105 106 static int 107 port_intr(void *arg) 108 { 109 struct port_event *pev; 110 struct port_softc *sc; 111 int reg; 112 int i; 113 114 sc = arg; 115 116 for (i = 0; i < NGPIO; i++) { 117 reg = READ4(sc, PORT_PCR(i)); 118 if (reg & PCR_ISF) { 119 120 /* Clear interrupt */ 121 WRITE4(sc, PORT_PCR(i), reg); 122 123 /* Handle event */ 124 pev = &event_map[i]; 125 if (pev->enabled == 1) { 126 if (pev->ih != NULL) { 127 pev->ih(pev->ih_user); 128 } 129 } 130 } 131 } 132 133 return (FILTER_HANDLED); 134 } 135 136 int 137 port_setup(int pnum, enum ev_type pevt, void (*ih)(void *), void *ih_user) 138 { 139 struct port_event *pev; 140 struct port_softc *sc; 141 int reg; 142 int val; 143 144 sc = port_sc; 145 146 switch (pevt) { 147 case DMA_RISING_EDGE: 148 val = PCR_DMA_RE; 149 break; 150 case DMA_FALLING_EDGE: 151 val = PCR_DMA_FE; 152 break; 153 case DMA_EITHER_EDGE: 154 val = PCR_DMA_EE; 155 break; 156 case INT_LOGIC_ZERO: 157 val = PCR_INT_LZ; 158 break; 159 case INT_RISING_EDGE: 160 val = PCR_INT_RE; 161 break; 162 case INT_FALLING_EDGE: 163 val = PCR_INT_FE; 164 break; 165 case INT_EITHER_EDGE: 166 val = PCR_INT_EE; 167 break; 168 case INT_LOGIC_ONE: 169 val = PCR_INT_LO; 170 break; 171 default: 172 return (-1); 173 } 174 175 reg = READ4(sc, PORT_PCR(pnum)); 176 reg &= ~(PCR_IRQC_M << PCR_IRQC_S); 177 reg |= (val << PCR_IRQC_S); 178 WRITE4(sc, PORT_PCR(pnum), reg); 179 180 pev = &event_map[pnum]; 181 pev->ih = ih; 182 pev->ih_user = ih_user; 183 pev->pevt = pevt; 184 pev->enabled = 1; 185 186 return (0); 187 } 188 189 static int 190 port_probe(device_t dev) 191 { 192 193 if (!ofw_bus_status_okay(dev)) 194 return (ENXIO); 195 196 if (!ofw_bus_is_compatible(dev, "fsl,mvf600-port")) 197 return (ENXIO); 198 199 device_set_desc(dev, "Vybrid Family Port control and interrupts"); 200 return (BUS_PROBE_DEFAULT); 201 } 202 203 static int 204 port_attach(device_t dev) 205 { 206 struct port_softc *sc; 207 int irq; 208 209 sc = device_get_softc(dev); 210 211 if (bus_alloc_resources(dev, port_spec, sc->res)) { 212 device_printf(dev, "could not allocate resources\n"); 213 return (ENXIO); 214 } 215 216 /* Memory interface */ 217 sc->bst = rman_get_bustag(sc->res[0]); 218 sc->bsh = rman_get_bushandle(sc->res[0]); 219 220 port_sc = sc; 221 222 for (irq = 0; irq < NPORTS; irq ++) { 223 if ((bus_setup_intr(dev, sc->res[1 + irq], INTR_TYPE_MISC, 224 port_intr, NULL, sc, &sc->gpio_ih[irq]))) { 225 device_printf(dev, 226 "ERROR: Unable to register interrupt handler\n"); 227 return (ENXIO); 228 } 229 } 230 231 return (0); 232 } 233 234 static device_method_t port_methods[] = { 235 DEVMETHOD(device_probe, port_probe), 236 DEVMETHOD(device_attach, port_attach), 237 { 0, 0 } 238 }; 239 240 static driver_t port_driver = { 241 "port", 242 port_methods, 243 sizeof(struct port_softc), 244 }; 245 246 static devclass_t port_devclass; 247 248 DRIVER_MODULE(port, simplebus, port_driver, port_devclass, 0, 0); 249