rk_gpio.c revision 1.2.2.2
1 1.2.2.2 pgoyette /* $NetBSD: rk_gpio.c,v 1.2.2.2 2018/06/25 07:25:39 pgoyette Exp $ */ 2 1.2.2.2 pgoyette 3 1.2.2.2 pgoyette /*- 4 1.2.2.2 pgoyette * Copyright (c) 2018 Jared McNeill <jmcneill (at) invisible.ca> 5 1.2.2.2 pgoyette * All rights reserved. 6 1.2.2.2 pgoyette * 7 1.2.2.2 pgoyette * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 pgoyette * modification, are permitted provided that the following conditions 9 1.2.2.2 pgoyette * are met: 10 1.2.2.2 pgoyette * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 pgoyette * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 pgoyette * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 pgoyette * documentation and/or other materials provided with the distribution. 15 1.2.2.2 pgoyette * 16 1.2.2.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.2.2.2 pgoyette * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.2.2.2 pgoyette * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.2.2.2 pgoyette * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.2.2.2 pgoyette * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.2.2.2 pgoyette * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.2.2.2 pgoyette * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.2.2.2 pgoyette * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.2.2.2 pgoyette * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.2.2 pgoyette * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.2.2 pgoyette * SUCH DAMAGE. 27 1.2.2.2 pgoyette */ 28 1.2.2.2 pgoyette 29 1.2.2.2 pgoyette #include <sys/cdefs.h> 30 1.2.2.2 pgoyette __KERNEL_RCSID(0, "$NetBSD: rk_gpio.c,v 1.2.2.2 2018/06/25 07:25:39 pgoyette Exp $"); 31 1.2.2.2 pgoyette 32 1.2.2.2 pgoyette #include <sys/param.h> 33 1.2.2.2 pgoyette #include <sys/bus.h> 34 1.2.2.2 pgoyette #include <sys/device.h> 35 1.2.2.2 pgoyette #include <sys/intr.h> 36 1.2.2.2 pgoyette #include <sys/systm.h> 37 1.2.2.2 pgoyette #include <sys/mutex.h> 38 1.2.2.2 pgoyette #include <sys/kmem.h> 39 1.2.2.2 pgoyette #include <sys/gpio.h> 40 1.2.2.2 pgoyette #include <sys/bitops.h> 41 1.2.2.2 pgoyette #include <sys/lwp.h> 42 1.2.2.2 pgoyette 43 1.2.2.2 pgoyette #include <dev/fdt/fdtvar.h> 44 1.2.2.2 pgoyette #include <dev/gpio/gpiovar.h> 45 1.2.2.2 pgoyette 46 1.2.2.2 pgoyette #define GPIO_SWPORTA_DR_REG 0x0000 47 1.2.2.2 pgoyette #define GPIO_SWPORTA_DDR_REG 0x0004 48 1.2.2.2 pgoyette #define GPIO_INTEN_REG 0x0030 49 1.2.2.2 pgoyette #define GPIO_INTMASK_REG 0x0034 50 1.2.2.2 pgoyette #define GPIO_INTTYPE_LEVEL_REG 0x0038 51 1.2.2.2 pgoyette #define GPIO_INT_POLARITY_REG 0x003c 52 1.2.2.2 pgoyette #define GPIO_INT_STATUS_REG 0x0040 53 1.2.2.2 pgoyette #define GPIO_INT_RAWSTATUS_REG 0x0044 54 1.2.2.2 pgoyette #define GPIO_DEBOUNCE_REG 0x0048 55 1.2.2.2 pgoyette #define GPIO_PORTA_EOI_REG 0x004c 56 1.2.2.2 pgoyette #define GPIO_EXT_PORTA_REG 0x0050 57 1.2.2.2 pgoyette #define GPIO_LS_SYNC_REG 0x0060 58 1.2.2.2 pgoyette 59 1.2.2.2 pgoyette static const char * const compatible[] = { 60 1.2.2.2 pgoyette "rockchip,gpio-bank", 61 1.2.2.2 pgoyette NULL 62 1.2.2.2 pgoyette }; 63 1.2.2.2 pgoyette 64 1.2.2.2 pgoyette struct rk_gpio_softc { 65 1.2.2.2 pgoyette device_t sc_dev; 66 1.2.2.2 pgoyette bus_space_tag_t sc_bst; 67 1.2.2.2 pgoyette bus_space_handle_t sc_bsh; 68 1.2.2.2 pgoyette kmutex_t sc_lock; 69 1.2.2.2 pgoyette 70 1.2.2.2 pgoyette struct gpio_chipset_tag sc_gp; 71 1.2.2.2 pgoyette gpio_pin_t sc_pins[32]; 72 1.2.2.2 pgoyette device_t sc_gpiodev; 73 1.2.2.2 pgoyette }; 74 1.2.2.2 pgoyette 75 1.2.2.2 pgoyette struct rk_gpio_pin { 76 1.2.2.2 pgoyette struct rk_gpio_softc *pin_sc; 77 1.2.2.2 pgoyette u_int pin_nr; 78 1.2.2.2 pgoyette int pin_flags; 79 1.2.2.2 pgoyette bool pin_actlo; 80 1.2.2.2 pgoyette }; 81 1.2.2.2 pgoyette 82 1.2.2.2 pgoyette #define RD4(sc, reg) \ 83 1.2.2.2 pgoyette bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg)) 84 1.2.2.2 pgoyette #define WR4(sc, reg, val) \ 85 1.2.2.2 pgoyette bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val)) 86 1.2.2.2 pgoyette 87 1.2.2.2 pgoyette static int rk_gpio_match(device_t, cfdata_t, void *); 88 1.2.2.2 pgoyette static void rk_gpio_attach(device_t, device_t, void *); 89 1.2.2.2 pgoyette 90 1.2.2.2 pgoyette CFATTACH_DECL_NEW(rk_gpio, sizeof(struct rk_gpio_softc), 91 1.2.2.2 pgoyette rk_gpio_match, rk_gpio_attach, NULL, NULL); 92 1.2.2.2 pgoyette 93 1.2.2.2 pgoyette static int 94 1.2.2.2 pgoyette rk_gpio_ctl(struct rk_gpio_softc *sc, u_int pin, int flags) 95 1.2.2.2 pgoyette { 96 1.2.2.2 pgoyette uint32_t ddr; 97 1.2.2.2 pgoyette 98 1.2.2.2 pgoyette KASSERT(mutex_owned(&sc->sc_lock)); 99 1.2.2.2 pgoyette 100 1.2.2.2 pgoyette ddr = RD4(sc, GPIO_SWPORTA_DDR_REG); 101 1.2.2.2 pgoyette if (flags & GPIO_PIN_INPUT) 102 1.2.2.2 pgoyette ddr &= ~__BIT(pin); 103 1.2.2.2 pgoyette else if (flags & GPIO_PIN_OUTPUT) 104 1.2.2.2 pgoyette ddr |= __BIT(pin); 105 1.2.2.2 pgoyette WR4(sc, GPIO_SWPORTA_DDR_REG, ddr); 106 1.2.2.2 pgoyette 107 1.2.2.2 pgoyette return 0; 108 1.2.2.2 pgoyette } 109 1.2.2.2 pgoyette 110 1.2.2.2 pgoyette static void * 111 1.2.2.2 pgoyette rk_gpio_acquire(device_t dev, const void *data, size_t len, int flags) 112 1.2.2.2 pgoyette { 113 1.2.2.2 pgoyette struct rk_gpio_softc * const sc = device_private(dev); 114 1.2.2.2 pgoyette struct rk_gpio_pin *gpin; 115 1.2.2.2 pgoyette const u_int *gpio = data; 116 1.2.2.2 pgoyette int error; 117 1.2.2.2 pgoyette 118 1.2.2.2 pgoyette if (len != 12) 119 1.2.2.2 pgoyette return NULL; 120 1.2.2.2 pgoyette 121 1.2.2.2 pgoyette const uint8_t pin = be32toh(gpio[1]) & 0xff; 122 1.2.2.2 pgoyette const bool actlo = be32toh(gpio[2]) & 1; 123 1.2.2.2 pgoyette 124 1.2.2.2 pgoyette if (pin >= __arraycount(sc->sc_pins)) 125 1.2.2.2 pgoyette return NULL; 126 1.2.2.2 pgoyette 127 1.2.2.2 pgoyette mutex_enter(&sc->sc_lock); 128 1.2.2.2 pgoyette error = rk_gpio_ctl(sc, pin, flags); 129 1.2.2.2 pgoyette mutex_exit(&sc->sc_lock); 130 1.2.2.2 pgoyette 131 1.2.2.2 pgoyette if (error != 0) 132 1.2.2.2 pgoyette return NULL; 133 1.2.2.2 pgoyette 134 1.2.2.2 pgoyette gpin = kmem_zalloc(sizeof(*gpin), KM_SLEEP); 135 1.2.2.2 pgoyette gpin->pin_sc = sc; 136 1.2.2.2 pgoyette gpin->pin_nr = pin; 137 1.2.2.2 pgoyette gpin->pin_flags = flags; 138 1.2.2.2 pgoyette gpin->pin_actlo = actlo; 139 1.2.2.2 pgoyette 140 1.2.2.2 pgoyette return gpin; 141 1.2.2.2 pgoyette } 142 1.2.2.2 pgoyette 143 1.2.2.2 pgoyette static void 144 1.2.2.2 pgoyette rk_gpio_release(device_t dev, void *priv) 145 1.2.2.2 pgoyette { 146 1.2.2.2 pgoyette struct rk_gpio_softc * const sc = device_private(dev); 147 1.2.2.2 pgoyette struct rk_gpio_pin *pin = priv; 148 1.2.2.2 pgoyette 149 1.2.2.2 pgoyette mutex_enter(&sc->sc_lock); 150 1.2.2.2 pgoyette rk_gpio_ctl(pin->pin_sc, pin->pin_nr, GPIO_PIN_INPUT); 151 1.2.2.2 pgoyette mutex_exit(&sc->sc_lock); 152 1.2.2.2 pgoyette 153 1.2.2.2 pgoyette kmem_free(pin, sizeof(*pin)); 154 1.2.2.2 pgoyette } 155 1.2.2.2 pgoyette 156 1.2.2.2 pgoyette static int 157 1.2.2.2 pgoyette rk_gpio_read(device_t dev, void *priv, bool raw) 158 1.2.2.2 pgoyette { 159 1.2.2.2 pgoyette struct rk_gpio_softc * const sc = device_private(dev); 160 1.2.2.2 pgoyette struct rk_gpio_pin *pin = priv; 161 1.2.2.2 pgoyette uint32_t data; 162 1.2.2.2 pgoyette int val; 163 1.2.2.2 pgoyette 164 1.2.2.2 pgoyette KASSERT(sc == pin->pin_sc); 165 1.2.2.2 pgoyette 166 1.2.2.2 pgoyette const uint32_t data_mask = __BIT(pin->pin_nr); 167 1.2.2.2 pgoyette 168 1.2.2.2 pgoyette /* No lock required for reads */ 169 1.2.2.2 pgoyette data = RD4(sc, GPIO_EXT_PORTA_REG); 170 1.2.2.2 pgoyette val = __SHIFTOUT(data, data_mask); 171 1.2.2.2 pgoyette if (!raw && pin->pin_actlo) 172 1.2.2.2 pgoyette val = !val; 173 1.2.2.2 pgoyette 174 1.2.2.2 pgoyette return val; 175 1.2.2.2 pgoyette } 176 1.2.2.2 pgoyette 177 1.2.2.2 pgoyette static void 178 1.2.2.2 pgoyette rk_gpio_write(device_t dev, void *priv, int val, bool raw) 179 1.2.2.2 pgoyette { 180 1.2.2.2 pgoyette struct rk_gpio_softc * const sc = device_private(dev); 181 1.2.2.2 pgoyette struct rk_gpio_pin *pin = priv; 182 1.2.2.2 pgoyette uint32_t data; 183 1.2.2.2 pgoyette 184 1.2.2.2 pgoyette KASSERT(sc == pin->pin_sc); 185 1.2.2.2 pgoyette 186 1.2.2.2 pgoyette const uint32_t data_mask = __BIT(pin->pin_nr); 187 1.2.2.2 pgoyette 188 1.2.2.2 pgoyette if (!raw && pin->pin_actlo) 189 1.2.2.2 pgoyette val = !val; 190 1.2.2.2 pgoyette 191 1.2.2.2 pgoyette mutex_enter(&sc->sc_lock); 192 1.2.2.2 pgoyette data = RD4(sc, GPIO_SWPORTA_DR_REG); 193 1.2.2.2 pgoyette if (val) 194 1.2.2.2 pgoyette data |= data_mask; 195 1.2.2.2 pgoyette else 196 1.2.2.2 pgoyette data &= ~data_mask; 197 1.2.2.2 pgoyette WR4(sc, GPIO_SWPORTA_DR_REG, data); 198 1.2.2.2 pgoyette mutex_exit(&sc->sc_lock); 199 1.2.2.2 pgoyette } 200 1.2.2.2 pgoyette 201 1.2.2.2 pgoyette static struct fdtbus_gpio_controller_func rk_gpio_funcs = { 202 1.2.2.2 pgoyette .acquire = rk_gpio_acquire, 203 1.2.2.2 pgoyette .release = rk_gpio_release, 204 1.2.2.2 pgoyette .read = rk_gpio_read, 205 1.2.2.2 pgoyette .write = rk_gpio_write, 206 1.2.2.2 pgoyette }; 207 1.2.2.2 pgoyette 208 1.2.2.2 pgoyette static int 209 1.2.2.2 pgoyette rk_gpio_pin_read(void *priv, int pin) 210 1.2.2.2 pgoyette { 211 1.2.2.2 pgoyette struct rk_gpio_softc * const sc = priv; 212 1.2.2.2 pgoyette uint32_t data; 213 1.2.2.2 pgoyette int val; 214 1.2.2.2 pgoyette 215 1.2.2.2 pgoyette KASSERT(pin < __arraycount(sc->sc_pins)); 216 1.2.2.2 pgoyette 217 1.2.2.2 pgoyette const uint32_t data_mask = __BIT(pin); 218 1.2.2.2 pgoyette 219 1.2.2.2 pgoyette /* No lock required for reads */ 220 1.2.2.2 pgoyette data = RD4(sc, GPIO_EXT_PORTA_REG); 221 1.2.2.2 pgoyette val = __SHIFTOUT(data, data_mask); 222 1.2.2.2 pgoyette 223 1.2.2.2 pgoyette return val; 224 1.2.2.2 pgoyette } 225 1.2.2.2 pgoyette 226 1.2.2.2 pgoyette static void 227 1.2.2.2 pgoyette rk_gpio_pin_write(void *priv, int pin, int val) 228 1.2.2.2 pgoyette { 229 1.2.2.2 pgoyette struct rk_gpio_softc * const sc = priv; 230 1.2.2.2 pgoyette uint32_t data; 231 1.2.2.2 pgoyette 232 1.2.2.2 pgoyette KASSERT(pin < __arraycount(sc->sc_pins)); 233 1.2.2.2 pgoyette 234 1.2.2.2 pgoyette const uint32_t data_mask = __BIT(pin); 235 1.2.2.2 pgoyette 236 1.2.2.2 pgoyette mutex_enter(&sc->sc_lock); 237 1.2.2.2 pgoyette data = RD4(sc, GPIO_SWPORTA_DR_REG); 238 1.2.2.2 pgoyette if (val) 239 1.2.2.2 pgoyette data |= data_mask; 240 1.2.2.2 pgoyette else 241 1.2.2.2 pgoyette data &= ~data_mask; 242 1.2.2.2 pgoyette WR4(sc, GPIO_SWPORTA_DR_REG, data); 243 1.2.2.2 pgoyette mutex_exit(&sc->sc_lock); 244 1.2.2.2 pgoyette } 245 1.2.2.2 pgoyette 246 1.2.2.2 pgoyette static void 247 1.2.2.2 pgoyette rk_gpio_pin_ctl(void *priv, int pin, int flags) 248 1.2.2.2 pgoyette { 249 1.2.2.2 pgoyette struct rk_gpio_softc * const sc = priv; 250 1.2.2.2 pgoyette 251 1.2.2.2 pgoyette KASSERT(pin < __arraycount(sc->sc_pins)); 252 1.2.2.2 pgoyette 253 1.2.2.2 pgoyette mutex_enter(&sc->sc_lock); 254 1.2.2.2 pgoyette rk_gpio_ctl(sc, pin, flags); 255 1.2.2.2 pgoyette mutex_exit(&sc->sc_lock); 256 1.2.2.2 pgoyette } 257 1.2.2.2 pgoyette 258 1.2.2.2 pgoyette static void 259 1.2.2.2 pgoyette rk_gpio_attach_ports(struct rk_gpio_softc *sc) 260 1.2.2.2 pgoyette { 261 1.2.2.2 pgoyette struct gpio_chipset_tag *gp = &sc->sc_gp; 262 1.2.2.2 pgoyette struct gpiobus_attach_args gba; 263 1.2.2.2 pgoyette u_int pin; 264 1.2.2.2 pgoyette 265 1.2.2.2 pgoyette gp->gp_cookie = sc; 266 1.2.2.2 pgoyette gp->gp_pin_read = rk_gpio_pin_read; 267 1.2.2.2 pgoyette gp->gp_pin_write = rk_gpio_pin_write; 268 1.2.2.2 pgoyette gp->gp_pin_ctl = rk_gpio_pin_ctl; 269 1.2.2.2 pgoyette 270 1.2.2.2 pgoyette for (pin = 0; pin < __arraycount(sc->sc_pins); pin++) { 271 1.2.2.2 pgoyette sc->sc_pins[pin].pin_num = pin; 272 1.2.2.2 pgoyette sc->sc_pins[pin].pin_caps = GPIO_PIN_INPUT | GPIO_PIN_OUTPUT; 273 1.2.2.2 pgoyette sc->sc_pins[pin].pin_state = rk_gpio_pin_read(sc, pin); 274 1.2.2.2 pgoyette } 275 1.2.2.2 pgoyette 276 1.2.2.2 pgoyette memset(&gba, 0, sizeof(gba)); 277 1.2.2.2 pgoyette gba.gba_gc = gp; 278 1.2.2.2 pgoyette gba.gba_pins = sc->sc_pins; 279 1.2.2.2 pgoyette gba.gba_npins = __arraycount(sc->sc_pins); 280 1.2.2.2 pgoyette sc->sc_gpiodev = config_found_ia(sc->sc_dev, "gpiobus", &gba, NULL); 281 1.2.2.2 pgoyette } 282 1.2.2.2 pgoyette 283 1.2.2.2 pgoyette static int 284 1.2.2.2 pgoyette rk_gpio_match(device_t parent, cfdata_t cf, void *aux) 285 1.2.2.2 pgoyette { 286 1.2.2.2 pgoyette struct fdt_attach_args * const faa = aux; 287 1.2.2.2 pgoyette 288 1.2.2.2 pgoyette return of_match_compatible(faa->faa_phandle, compatible); 289 1.2.2.2 pgoyette } 290 1.2.2.2 pgoyette 291 1.2.2.2 pgoyette static void 292 1.2.2.2 pgoyette rk_gpio_attach(device_t parent, device_t self, void *aux) 293 1.2.2.2 pgoyette { 294 1.2.2.2 pgoyette struct rk_gpio_softc * const sc = device_private(self); 295 1.2.2.2 pgoyette struct fdt_attach_args * const faa = aux; 296 1.2.2.2 pgoyette const int phandle = faa->faa_phandle; 297 1.2.2.2 pgoyette struct clk *clk; 298 1.2.2.2 pgoyette bus_addr_t addr; 299 1.2.2.2 pgoyette bus_size_t size; 300 1.2.2.2 pgoyette 301 1.2.2.2 pgoyette if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 302 1.2.2.2 pgoyette aprint_error(": couldn't get registers\n"); 303 1.2.2.2 pgoyette return; 304 1.2.2.2 pgoyette } 305 1.2.2.2 pgoyette 306 1.2.2.2 pgoyette if ((clk = fdtbus_clock_get_index(phandle, 0)) == NULL || clk_enable(clk) != 0) { 307 1.2.2.2 pgoyette aprint_error(": couldn't enable clock\n"); 308 1.2.2.2 pgoyette return; 309 1.2.2.2 pgoyette } 310 1.2.2.2 pgoyette 311 1.2.2.2 pgoyette sc->sc_dev = self; 312 1.2.2.2 pgoyette sc->sc_bst = faa->faa_bst; 313 1.2.2.2 pgoyette if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) { 314 1.2.2.2 pgoyette aprint_error(": couldn't map registers\n"); 315 1.2.2.2 pgoyette return; 316 1.2.2.2 pgoyette } 317 1.2.2.2 pgoyette mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_VM); 318 1.2.2.2 pgoyette 319 1.2.2.2 pgoyette aprint_naive("\n"); 320 1.2.2.2 pgoyette aprint_normal(": GPIO (%s)\n", fdtbus_get_string(phandle, "name")); 321 1.2.2.2 pgoyette 322 1.2.2.2 pgoyette fdtbus_register_gpio_controller(self, phandle, &rk_gpio_funcs); 323 1.2.2.2 pgoyette 324 1.2.2.2 pgoyette rk_gpio_attach_ports(sc); 325 1.2.2.2 pgoyette } 326
Indexes created Thu Oct 02 14:10:14 GMT 2025