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ar71xx_gpio.c (221518) ar71xx_gpio.c (228518)
1/*-
2 * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
3 * Copyright (c) 2009, Luiz Otavio O Souza.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:

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26 * SUCH DAMAGE.
27 */
28
29/*
30 * GPIO driver for AR71xx
31 */
32
33#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
3 * Copyright (c) 2009, Luiz Otavio O Souza.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:

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26 * SUCH DAMAGE.
27 */
28
29/*
30 * GPIO driver for AR71xx
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/mips/atheros/ar71xx_gpio.c 221518 2011-05-06 02:45:02Z adrian $");
34__FBSDID("$FreeBSD: head/sys/mips/atheros/ar71xx_gpio.c 228518 2011-12-15 01:03:49Z adrian $");
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/bus.h>
39
40#include <sys/kernel.h>
41#include <sys/module.h>
42#include <sys/rman.h>

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49#include <mips/atheros/ar71xxreg.h>
50#include <mips/atheros/ar71xx_setup.h>
51#include <mips/atheros/ar71xx_gpiovar.h>
52
53#include "gpio_if.h"
54
55#define DEFAULT_CAPS (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT)
56
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/bus.h>
39
40#include <sys/kernel.h>
41#include <sys/module.h>
42#include <sys/rman.h>

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49#include <mips/atheros/ar71xxreg.h>
50#include <mips/atheros/ar71xx_setup.h>
51#include <mips/atheros/ar71xx_gpiovar.h>
52
53#include "gpio_if.h"
54
55#define DEFAULT_CAPS (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT)
56
57struct ar71xx_gpio_pin {
58 const char *name;
59 int pin;
60 int flags;
61};
62
63static struct ar71xx_gpio_pin ar71xx_gpio_pins[] = {
64 { "RFled", 2, GPIO_PIN_OUTPUT},
65 { "SW4", 8, GPIO_PIN_INPUT},
66 { NULL, 0, 0},
67};
68
69/*
70 * Helpers
71 */
72static void ar71xx_gpio_function_enable(struct ar71xx_gpio_softc *sc,
73 uint32_t mask);
74static void ar71xx_gpio_function_disable(struct ar71xx_gpio_softc *sc,
75 uint32_t mask);
76static void ar71xx_gpio_pin_configure(struct ar71xx_gpio_softc *sc,

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348 return (0);
349}
350
351static int
352ar71xx_gpio_attach(device_t dev)
353{
354 struct ar71xx_gpio_softc *sc = device_get_softc(dev);
355 int error = 0;
57/*
58 * Helpers
59 */
60static void ar71xx_gpio_function_enable(struct ar71xx_gpio_softc *sc,
61 uint32_t mask);
62static void ar71xx_gpio_function_disable(struct ar71xx_gpio_softc *sc,
63 uint32_t mask);
64static void ar71xx_gpio_pin_configure(struct ar71xx_gpio_softc *sc,

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336 return (0);
337}
338
339static int
340ar71xx_gpio_attach(device_t dev)
341{
342 struct ar71xx_gpio_softc *sc = device_get_softc(dev);
343 int error = 0;
356 struct ar71xx_gpio_pin *pinp;
357 int i;
344 int i, j, maxpin;
345 int mask;
346 int old = 0;
358
359 KASSERT((device_get_unit(dev) == 0),
360 ("ar71xx_gpio: Only one gpio module supported"));
361
362 mtx_init(&sc->gpio_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
363 MTX_DEF);
364
365 /* Map control/status registers. */

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383 if ((bus_setup_intr(dev, sc->gpio_irq_res, INTR_TYPE_MISC,
384 ar71xx_gpio_filter, ar71xx_gpio_intr, sc, &sc->gpio_ih))) {
385 device_printf(dev,
386 "WARNING: unable to register interrupt handler\n");
387 return (ENXIO);
388 }
389
390 sc->dev = dev;
347
348 KASSERT((device_get_unit(dev) == 0),
349 ("ar71xx_gpio: Only one gpio module supported"));
350
351 mtx_init(&sc->gpio_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
352 MTX_DEF);
353
354 /* Map control/status registers. */

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372 if ((bus_setup_intr(dev, sc->gpio_irq_res, INTR_TYPE_MISC,
373 ar71xx_gpio_filter, ar71xx_gpio_intr, sc, &sc->gpio_ih))) {
374 device_printf(dev,
375 "WARNING: unable to register interrupt handler\n");
376 return (ENXIO);
377 }
378
379 sc->dev = dev;
391 ar71xx_gpio_function_enable(sc, GPIO_FUNC_SPI_CS1_EN);
392 ar71xx_gpio_function_enable(sc, GPIO_FUNC_SPI_CS2_EN);
380
381 /* Enable function bits that are required */
382 if (resource_int_value(device_get_name(dev), device_get_unit(dev),
383 "function_set", &mask) == 0) {
384 device_printf(dev, "function_set: 0x%x\n", mask);
385 ar71xx_gpio_function_enable(sc, mask);
386 old = 1;
387 }
388 /* Disable function bits that are required */
389 if (resource_int_value(device_get_name(dev), device_get_unit(dev),
390 "function_clear", &mask) == 0) {
391 device_printf(dev, "function_clear: 0x%x\n", mask);
392 ar71xx_gpio_function_disable(sc, mask);
393 old = 1;
394 }
395 /* Handle previous behaviour */
396 if (old == 0) {
397 ar71xx_gpio_function_enable(sc, GPIO_FUNC_SPI_CS1_EN);
398 ar71xx_gpio_function_enable(sc, GPIO_FUNC_SPI_CS2_EN);
399 }
400
393 /* Configure all pins as input */
394 /* disable interrupts for all pins */
395 GPIO_WRITE(sc, AR71XX_GPIO_INT_MASK, 0);
401 /* Configure all pins as input */
402 /* disable interrupts for all pins */
403 GPIO_WRITE(sc, AR71XX_GPIO_INT_MASK, 0);
396 pinp = ar71xx_gpio_pins;
397 i = 0;
398 while (pinp->name) {
399 strncpy(sc->gpio_pins[i].gp_name, pinp->name, GPIOMAXNAME);
400 sc->gpio_pins[i].gp_pin = pinp->pin;
404
405 /* Initialise all pins specified in the mask, up to the pin count */
406 (void) ar71xx_gpio_pin_max(dev, &maxpin);
407 if (resource_int_value(device_get_name(dev), device_get_unit(dev),
408 "pinmask", &mask) != 0)
409 mask = 0;
410 device_printf(dev, "gpio pinmask=0x%x\n", mask);
411 for (i = 0, j = 0; j < maxpin; j++) {
412 if ((mask & (1 << j)) == 0)
413 continue;
414 snprintf(sc->gpio_pins[i].gp_name, GPIOMAXNAME,
415 "pin %d", j);
416 sc->gpio_pins[i].gp_pin = j;
401 sc->gpio_pins[i].gp_caps = DEFAULT_CAPS;
402 sc->gpio_pins[i].gp_flags = 0;
417 sc->gpio_pins[i].gp_caps = DEFAULT_CAPS;
418 sc->gpio_pins[i].gp_flags = 0;
403 ar71xx_gpio_pin_configure(sc, &sc->gpio_pins[i], pinp->flags);
404 pinp++;
419 ar71xx_gpio_pin_configure(sc, &sc->gpio_pins[i], DEFAULT_CAPS);
405 i++;
406 }
420 i++;
421 }
407
408 sc->gpio_npins = i;
422 sc->gpio_npins = i;
409
410 device_add_child(dev, "gpioc", device_get_unit(dev));
411 device_add_child(dev, "gpiobus", device_get_unit(dev));
412 return (bus_generic_attach(dev));
413}
414
415static int
416ar71xx_gpio_detach(device_t dev)
417{

--- 42 unchanged lines hidden --- 		423 device_add_child(dev, "gpioc", device_get_unit(dev));
424 device_add_child(dev, "gpiobus", device_get_unit(dev));
425 return (bus_generic_attach(dev));
426}
427
428static int
429ar71xx_gpio_detach(device_t dev)
430{

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