rmixl_gpio.c revision 1.1.2.2
1 1.1.2.2 rmind /* $NetBSD: rmixl_gpio.c,v 1.1.2.2 2011/04/21 01:41:13 rmind Exp $ */ 2 1.1.2.2 rmind /* $NetBSD: rmixl_gpio.c,v 1.1.2.2 2011/04/21 01:41:13 rmind Exp $ */ 3 1.1.2.2 rmind /*- 4 1.1.2.2 rmind * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 1.1.2.2 rmind * All rights reserved. 6 1.1.2.2 rmind * 7 1.1.2.2 rmind * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 rmind * by Matt Thomas 9 1.1.2.2 rmind * 10 1.1.2.2 rmind * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 rmind * modification, are permitted provided that the following conditions 12 1.1.2.2 rmind * are met: 13 1.1.2.2 rmind * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 rmind * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 rmind * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 rmind * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 rmind * documentation and/or other materials provided with the distribution. 18 1.1.2.2 rmind * 19 1.1.2.2 rmind * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.2.2 rmind * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.2.2 rmind * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.2.2 rmind * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.2.2 rmind * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.2.2 rmind * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.2.2 rmind * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.2.2 rmind * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.2.2 rmind * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.2.2 rmind * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.2.2 rmind * POSSIBILITY OF SUCH DAMAGE. 30 1.1.2.2 rmind */ 31 1.1.2.2 rmind #include <sys/cdefs.h> 32 1.1.2.2 rmind __KERNEL_RCSID(0, "$NetBSD: rmixl_gpio.c,v 1.1.2.2 2011/04/21 01:41:13 rmind Exp $"); 33 1.1.2.2 rmind 34 1.1.2.2 rmind #define _INTR_PRIVATE 35 1.1.2.2 rmind 36 1.1.2.2 rmind #include "locators.h" 37 1.1.2.2 rmind #include "gpio.h" 38 1.1.2.2 rmind 39 1.1.2.2 rmind #include <sys/param.h> 40 1.1.2.2 rmind #include <sys/evcnt.h> 41 1.1.2.2 rmind #include <sys/atomic.h> 42 1.1.2.2 rmind 43 1.1.2.2 rmind #include <uvm/uvm_extern.h> 44 1.1.2.2 rmind 45 1.1.2.2 rmind #include <machine/intr.h> 46 1.1.2.2 rmind 47 1.1.2.2 rmind #include <mips/cpu.h> 48 1.1.2.2 rmind 49 1.1.2.2 rmind #include <machine/bus.h> 50 1.1.2.2 rmind 51 1.1.2.2 rmind #include <mips/rmi/rmixlreg.h> 52 1.1.2.2 rmind #include <mips/rmi/rmixlvar.h> 53 1.1.2.2 rmind #include <mips/rmi/rmixl_obiovar.h> 54 1.1.2.2 rmind 55 1.1.2.2 rmind #if NGPIO > 0 56 1.1.2.2 rmind #include <sys/gpio.h> 57 1.1.2.2 rmind #include <dev/gpio/gpiovar.h> 58 1.1.2.2 rmind #endif 59 1.1.2.2 rmind 60 1.1.2.2 rmind struct gpio_softc { 61 1.1.2.2 rmind device_t gpio_dev; 62 1.1.2.2 rmind void *gpio_ih; 63 1.1.2.2 rmind bus_space_tag_t gpio_memt; 64 1.1.2.2 rmind bus_space_handle_t gpio_memh; 65 1.1.2.2 rmind uint32_t gpio_enable_mask; 66 1.1.2.2 rmind uint32_t gpio_edge_mask; 67 1.1.2.2 rmind uint32_t gpio_edge_falling_mask; 68 1.1.2.2 rmind uint32_t gpio_edge_rising_mask; 69 1.1.2.2 rmind uint32_t gpio_level_mask; 70 1.1.2.2 rmind uint32_t gpio_level_hi_mask; 71 1.1.2.2 rmind uint32_t gpio_level_lo_mask; 72 1.1.2.2 rmind uint32_t gpio_inuse_mask; 73 1.1.2.2 rmind #if NGPIO > 0 74 1.1.2.2 rmind struct gpio_chipset_tag gpio_chipset; 75 1.1.2.2 rmind gpio_pin_t gpio_pins[RMIXL_GPIO_NSIGNALS]; 76 1.1.2.2 rmind #endif 77 1.1.2.2 rmind }; 78 1.1.2.2 rmind 79 1.1.2.2 rmind #define GPIO_READ(gpio, reg) \ 80 1.1.2.2 rmind bus_space_read_4((gpio)->gpio_memt, (gpio)->gpio_memh, (reg)) 81 1.1.2.2 rmind #define GPIO_WRITE(gpio, reg, val) \ 82 1.1.2.2 rmind bus_space_write_4((gpio)->gpio_memt, (gpio)->gpio_memh, (reg), (val)) 83 1.1.2.2 rmind 84 1.1.2.2 rmind static int gpio_match(device_t, cfdata_t, void *); 85 1.1.2.2 rmind static void gpio_attach(device_t, device_t, void *); 86 1.1.2.2 rmind 87 1.1.2.2 rmind CFATTACH_DECL_NEW(rmixl_gpio, 88 1.1.2.2 rmind sizeof(struct gpio_softc), 89 1.1.2.2 rmind gpio_match, gpio_attach, 90 1.1.2.2 rmind NULL, NULL); 91 1.1.2.2 rmind 92 1.1.2.2 rmind #if NGPIO > 0 93 1.1.2.2 rmind 94 1.1.2.2 rmind static int 95 1.1.2.2 rmind rmixl_gpio_pin_read(void *arg, int pin) 96 1.1.2.2 rmind { 97 1.1.2.2 rmind struct gpio_softc * const gpio = arg; 98 1.1.2.2 rmind 99 1.1.2.2 rmind KASSERT(((1 << pin) & RMIXL_GPIO_INPUT_MASK) != 0); 100 1.1.2.2 rmind return (GPIO_READ(gpio, RMIXL_GPIO_INPUT) >> pin) & 1; 101 1.1.2.2 rmind } 102 1.1.2.2 rmind 103 1.1.2.2 rmind static void 104 1.1.2.2 rmind rmixl_gpio_pin_write(void *arg, int pin, int value) 105 1.1.2.2 rmind { 106 1.1.2.2 rmind struct gpio_softc * const gpio = arg; 107 1.1.2.2 rmind uint32_t mask = 1 << pin; 108 1.1.2.2 rmind uint32_t old, new; 109 1.1.2.2 rmind 110 1.1.2.2 rmind KASSERT(((1 << pin) & RMIXL_GPIO_OUTPUT_MASK) != 0); 111 1.1.2.2 rmind 112 1.1.2.2 rmind old = GPIO_READ(gpio, RMIXL_GPIO_OUTPUT); 113 1.1.2.2 rmind if (value) 114 1.1.2.2 rmind new = old | mask; 115 1.1.2.2 rmind else 116 1.1.2.2 rmind new = old & ~mask; 117 1.1.2.2 rmind 118 1.1.2.2 rmind if (old != new) 119 1.1.2.2 rmind GPIO_WRITE(gpio, RMIXL_GPIO_OUTPUT, new); 120 1.1.2.2 rmind } 121 1.1.2.2 rmind 122 1.1.2.2 rmind static void 123 1.1.2.2 rmind rmixl_gpio_pin_ctl(void *arg, int pin, int flags) 124 1.1.2.2 rmind { 125 1.1.2.2 rmind struct gpio_softc * const gpio = arg; 126 1.1.2.2 rmind uint32_t mask = 1 << pin; 127 1.1.2.2 rmind uint32_t old, new; 128 1.1.2.2 rmind 129 1.1.2.2 rmind KASSERT((flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) != (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)); 130 1.1.2.2 rmind old = GPIO_READ(gpio, RMIXL_GPIO_IO_DIR); 131 1.1.2.2 rmind new = old; 132 1.1.2.2 rmind switch (flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) { 133 1.1.2.2 rmind case GPIO_PIN_INPUT: new &= ~mask; break; 134 1.1.2.2 rmind case GPIO_PIN_OUTPUT: new |= mask; break; 135 1.1.2.2 rmind default: return; 136 1.1.2.2 rmind } 137 1.1.2.2 rmind if (old != new) 138 1.1.2.2 rmind GPIO_WRITE(gpio, RMIXL_GPIO_IO_DIR, new); 139 1.1.2.2 rmind } 140 1.1.2.2 rmind 141 1.1.2.2 rmind static void 142 1.1.2.2 rmind gpio_defer(device_t self) 143 1.1.2.2 rmind { 144 1.1.2.2 rmind struct gpio_softc * const gpio = device_private(self); 145 1.1.2.2 rmind struct gpio_chipset_tag * const gp = &gpio->gpio_chipset; 146 1.1.2.2 rmind struct gpiobus_attach_args gba; 147 1.1.2.2 rmind gpio_pin_t *pins; 148 1.1.2.2 rmind uint32_t mask, dir, valueout, valuein; 149 1.1.2.2 rmind int pin; 150 1.1.2.2 rmind 151 1.1.2.2 rmind gp->gp_cookie = gpio; 152 1.1.2.2 rmind gp->gp_pin_read = rmixl_gpio_pin_read; 153 1.1.2.2 rmind gp->gp_pin_write = rmixl_gpio_pin_write; 154 1.1.2.2 rmind gp->gp_pin_ctl = rmixl_gpio_pin_ctl; 155 1.1.2.2 rmind 156 1.1.2.2 rmind gba.gba_gc = gp; 157 1.1.2.2 rmind gba.gba_pins = gpio->gpio_pins; 158 1.1.2.2 rmind gba.gba_npins = __arraycount(gpio->gpio_pins); 159 1.1.2.2 rmind 160 1.1.2.2 rmind dir = GPIO_READ(gpio, RMIXL_GPIO_IO_DIR); 161 1.1.2.2 rmind valueout = GPIO_READ(gpio, RMIXL_GPIO_OUTPUT); 162 1.1.2.2 rmind valuein = GPIO_READ(gpio, RMIXL_GPIO_INPUT); 163 1.1.2.2 rmind for (pin = 0, mask = 1, pins = gpio->gpio_pins; 164 1.1.2.2 rmind pin < RMIXL_GPIO_NSIGNALS; pin++, mask <<= 1, pins++) { 165 1.1.2.2 rmind pins->pin_num = pin; 166 1.1.2.2 rmind if (gpio->gpio_inuse_mask & mask) { 167 1.1.2.2 rmind if ((gpio->gpio_inuse_mask & RMIXL_GPIO_INPUT_MASK)) 168 1.1.2.2 rmind pins->pin_caps = GPIO_PIN_INPUT; 169 1.1.2.2 rmind } else { 170 1.1.2.2 rmind int caps = 0; 171 1.1.2.2 rmind if ((gpio->gpio_inuse_mask & RMIXL_GPIO_INPUT_MASK)) 172 1.1.2.2 rmind caps |= GPIO_PIN_INPUT; 173 1.1.2.2 rmind if ((gpio->gpio_inuse_mask & RMIXL_GPIO_OUTPUT_MASK)) 174 1.1.2.2 rmind caps |= GPIO_PIN_INPUT; 175 1.1.2.2 rmind pins->pin_caps = caps; 176 1.1.2.2 rmind } 177 1.1.2.2 rmind pins->pin_flags = 178 1.1.2.2 rmind (dir & mask) ? GPIO_PIN_OUTPUT : GPIO_PIN_INPUT; 179 1.1.2.2 rmind pins->pin_state = 180 1.1.2.2 rmind (((dir & mask) ? valueout : valuein) & mask) 181 1.1.2.2 rmind ? GPIO_PIN_LOW 182 1.1.2.2 rmind : GPIO_PIN_HIGH; 183 1.1.2.2 rmind } 184 1.1.2.2 rmind 185 1.1.2.2 rmind config_found_ia(self, "gpiobus", &gba, gpiobus_print); 186 1.1.2.2 rmind } 187 1.1.2.2 rmind #endif /* NGPIO > 0 */ 188 1.1.2.2 rmind 189 1.1.2.2 rmind int 190 1.1.2.2 rmind gpio_match(device_t parent, cfdata_t cfdata, void *aux) 191 1.1.2.2 rmind { 192 1.1.2.2 rmind struct obio_attach_args *oa = aux; 193 1.1.2.2 rmind 194 1.1.2.2 rmind if (oa->obio_addr == RMIXL_IO_DEV_GPIO) /* XXX XLS */ 195 1.1.2.2 rmind return 1; 196 1.1.2.2 rmind 197 1.1.2.2 rmind return 0; 198 1.1.2.2 rmind } 199 1.1.2.2 rmind 200 1.1.2.2 rmind void 201 1.1.2.2 rmind gpio_attach(device_t parent, device_t self, void *aux) 202 1.1.2.2 rmind { 203 1.1.2.2 rmind struct obio_attach_args * const oa = aux; 204 1.1.2.2 rmind struct gpio_softc * const gpio = device_private(self); 205 1.1.2.2 rmind int error; 206 1.1.2.2 rmind 207 1.1.2.2 rmind gpio->gpio_dev = self; 208 1.1.2.2 rmind 209 1.1.2.2 rmind if (oa->obio_intr == OBIOCF_INTR_DEFAULT) 210 1.1.2.2 rmind panic("\n%s: no intr assigned", device_xname(self)); 211 1.1.2.2 rmind 212 1.1.2.2 rmind if (oa->obio_size == OBIOCF_SIZE_DEFAULT) 213 1.1.2.2 rmind oa->obio_size = 0x1000; 214 1.1.2.2 rmind 215 1.1.2.2 rmind gpio->gpio_memt = oa->obio_eb_bst; 216 1.1.2.2 rmind error = bus_space_map(oa->obio_eb_bst, oa->obio_addr, oa->obio_size, 217 1.1.2.2 rmind 0, &gpio->gpio_memh); 218 1.1.2.2 rmind 219 1.1.2.2 rmind if (error) { 220 1.1.2.2 rmind aprint_error(": failed to map register %#" 221 1.1.2.2 rmind PRIxBUSSIZE "@%#" PRIxBUSADDR ": %d\n", 222 1.1.2.2 rmind oa->obio_size, oa->obio_addr, error); 223 1.1.2.2 rmind return; 224 1.1.2.2 rmind } 225 1.1.2.2 rmind 226 1.1.2.2 rmind #ifdef NOTYET 227 1.1.2.2 rmind if (oa->obio_intr != OBIOCF_INTR_DEFAULT) { 228 1.1.2.2 rmind gpio->gpio_ih = intr_establish(oa->obio_intr, 229 1.1.2.2 rmind IPL_HIGH, IST_LEVEL, pic_handle_intr, &gpio->gpio_pic); 230 1.1.2.2 rmind KASSERT(gpio->gpio_ih != NULL); 231 1.1.2.2 rmind aprint_normal(", intr %d", oa->obio_intr); 232 1.1.2.2 rmind } 233 1.1.2.2 rmind #endif 234 1.1.2.2 rmind aprint_normal("\n"); 235 1.1.2.2 rmind #if NGPIO > 0 236 1.1.2.2 rmind config_interrupts(self, gpio_defer); 237 1.1.2.2 rmind #endif 238 1.1.2.2 rmind } 239
Indexes created Tue Oct 14 00:09:49 GMT 2025