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ti_gpio.c revision 1.3.2.2 
      1  1.3.2.2  martin /* $NetBSD: ti_gpio.c,v 1.3.2.2 2019/11/27 13:46:44 martin Exp $ */
      2  1.3.2.2  martin 
      3  1.3.2.2  martin /*-
      4  1.3.2.2  martin  * Copyright (c) 2019 Jared McNeill <jmcneill (at) invisible.ca>
      5  1.3.2.2  martin  * All rights reserved.
      6  1.3.2.2  martin  *
      7  1.3.2.2  martin  * Redistribution and use in source and binary forms, with or without
      8  1.3.2.2  martin  * modification, are permitted provided that the following conditions
      9  1.3.2.2  martin  * are met:
     10  1.3.2.2  martin  * 1. Redistributions of source code must retain the above copyright
     11  1.3.2.2  martin  *    notice, this list of conditions and the following disclaimer.
     12  1.3.2.2  martin  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.3.2.2  martin  *    notice, this list of conditions and the following disclaimer in the
     14  1.3.2.2  martin  *    documentation and/or other materials provided with the distribution.
     15  1.3.2.2  martin  *
     16  1.3.2.2  martin  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  1.3.2.2  martin  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  1.3.2.2  martin  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  1.3.2.2  martin  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  1.3.2.2  martin  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  1.3.2.2  martin  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  1.3.2.2  martin  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  1.3.2.2  martin  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  1.3.2.2  martin  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  1.3.2.2  martin  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  1.3.2.2  martin  * SUCH DAMAGE.
     27  1.3.2.2  martin  */
     28  1.3.2.2  martin 
     29  1.3.2.2  martin #include <sys/cdefs.h>
     30  1.3.2.2  martin __KERNEL_RCSID(0, "$NetBSD: ti_gpio.c,v 1.3.2.2 2019/11/27 13:46:44 martin Exp $");
     31  1.3.2.2  martin 
     32  1.3.2.2  martin #include <sys/param.h>
     33  1.3.2.2  martin #include <sys/bus.h>
     34  1.3.2.2  martin #include <sys/device.h>
     35  1.3.2.2  martin #include <sys/intr.h>
     36  1.3.2.2  martin #include <sys/systm.h>
     37  1.3.2.2  martin #include <sys/mutex.h>
     38  1.3.2.2  martin #include <sys/kmem.h>
     39  1.3.2.2  martin #include <sys/gpio.h>
     40  1.3.2.2  martin #include <sys/bitops.h>
     41  1.3.2.2  martin 
     42  1.3.2.2  martin #include <dev/fdt/fdtvar.h>
     43  1.3.2.2  martin #include <dev/gpio/gpiovar.h>
     44  1.3.2.2  martin 
     45  1.3.2.2  martin #include <arm/ti/ti_prcm.h>
     46  1.3.2.2  martin 
     47  1.3.2.2  martin #define	TI_GPIO_NPINS			32
     48  1.3.2.2  martin 
     49  1.3.2.2  martin enum ti_gpio_type {
     50  1.3.2.2  martin 	TI_GPIO_OMAP3,
     51  1.3.2.2  martin 	TI_GPIO_OMAP4,
     52  1.3.2.2  martin 	TI_NGPIO
     53  1.3.2.2  martin };
     54  1.3.2.2  martin 
     55  1.3.2.2  martin enum {
     56  1.3.2.2  martin 	GPIO_IRQSTATUS1,
     57  1.3.2.2  martin 	GPIO_IRQENABLE1,	/* OMAP3 */
     58  1.3.2.2  martin 	GPIO_IRQENABLE1_SET,	/* OMAP4 */
     59  1.3.2.2  martin 	GPIO_IRQENABLE1_CLR,	/* OMAP4 */
     60  1.3.2.2  martin 	GPIO_OE,
     61  1.3.2.2  martin 	GPIO_DATAIN,
     62  1.3.2.2  martin 	GPIO_DATAOUT,
     63  1.3.2.2  martin 	GPIO_LEVELDETECT0,
     64  1.3.2.2  martin 	GPIO_LEVELDETECT1,
     65  1.3.2.2  martin 	GPIO_RISINGDETECT,
     66  1.3.2.2  martin 	GPIO_FALLINGDETECT,
     67  1.3.2.2  martin 	GPIO_CLEARDATAOUT,
     68  1.3.2.2  martin 	GPIO_SETDATAOUT,
     69  1.3.2.2  martin 	GPIO_NREG
     70  1.3.2.2  martin };
     71  1.3.2.2  martin 
     72  1.3.2.2  martin static const u_int ti_gpio_regmap[TI_NGPIO][GPIO_NREG] = {
     73  1.3.2.2  martin 	[TI_GPIO_OMAP3] = {
     74  1.3.2.2  martin 		[GPIO_IRQSTATUS1]	= 0x18,
     75  1.3.2.2  martin 		[GPIO_IRQENABLE1]	= 0x1c,
     76  1.3.2.2  martin 		[GPIO_OE]		= 0x34,
     77  1.3.2.2  martin 		[GPIO_DATAIN]		= 0x38,
     78  1.3.2.2  martin 		[GPIO_DATAOUT]		= 0x3c,
     79  1.3.2.2  martin 		[GPIO_LEVELDETECT0]	= 0x40,
     80  1.3.2.2  martin 		[GPIO_LEVELDETECT1]	= 0x44,
     81  1.3.2.2  martin 		[GPIO_RISINGDETECT]	= 0x48,
     82  1.3.2.2  martin 		[GPIO_FALLINGDETECT]	= 0x4c,
     83  1.3.2.2  martin 		[GPIO_CLEARDATAOUT]	= 0x90,
     84  1.3.2.2  martin 		[GPIO_SETDATAOUT]	= 0x94,
     85  1.3.2.2  martin 	},
     86  1.3.2.2  martin 	[TI_GPIO_OMAP4] = {
     87  1.3.2.2  martin 		[GPIO_IRQSTATUS1]	= 0x2c,
     88  1.3.2.2  martin 		[GPIO_IRQENABLE1_SET]	= 0x34,
     89  1.3.2.2  martin 		[GPIO_IRQENABLE1_CLR]	= 0x38,
     90  1.3.2.2  martin 		[GPIO_OE]		= 0x134,
     91  1.3.2.2  martin 		[GPIO_DATAIN]		= 0x138,
     92  1.3.2.2  martin 		[GPIO_DATAOUT]		= 0x13c,
     93  1.3.2.2  martin 		[GPIO_LEVELDETECT0]	= 0x140,
     94  1.3.2.2  martin 		[GPIO_LEVELDETECT1]	= 0x144,
     95  1.3.2.2  martin 		[GPIO_RISINGDETECT]	= 0x148,
     96  1.3.2.2  martin 		[GPIO_FALLINGDETECT]	= 0x14c,
     97  1.3.2.2  martin 		[GPIO_CLEARDATAOUT]	= 0x190,
     98  1.3.2.2  martin 		[GPIO_SETDATAOUT]	= 0x194,
     99  1.3.2.2  martin 	},
    100  1.3.2.2  martin };
    101  1.3.2.2  martin 
    102  1.3.2.2  martin static const struct of_compat_data compat_data[] = {
    103  1.3.2.2  martin 	{ "ti,omap3-gpio",		TI_GPIO_OMAP3 },
    104  1.3.2.2  martin 	{ "ti,omap4-gpio",		TI_GPIO_OMAP4 },
    105  1.3.2.2  martin 	{ NULL }
    106  1.3.2.2  martin };
    107  1.3.2.2  martin 
    108  1.3.2.2  martin struct ti_gpio_intr {
    109  1.3.2.2  martin 	u_int intr_pin;
    110  1.3.2.2  martin 	int (*intr_func)(void *);
    111  1.3.2.2  martin 	void *intr_arg;
    112  1.3.2.2  martin 	bool intr_mpsafe;
    113  1.3.2.2  martin };
    114  1.3.2.2  martin 
    115  1.3.2.2  martin struct ti_gpio_softc {
    116  1.3.2.2  martin 	device_t sc_dev;
    117  1.3.2.2  martin 	bus_space_tag_t sc_bst;
    118  1.3.2.2  martin 	bus_space_handle_t sc_bsh;
    119  1.3.2.2  martin 	kmutex_t sc_lock;
    120  1.3.2.2  martin 	enum ti_gpio_type sc_type;
    121  1.3.2.2  martin 	const char *sc_modname;
    122  1.3.2.2  martin 	void *sc_ih;
    123  1.3.2.2  martin 
    124  1.3.2.2  martin 	struct gpio_chipset_tag sc_gp;
    125  1.3.2.2  martin 	gpio_pin_t sc_pins[TI_GPIO_NPINS];
    126  1.3.2.2  martin 	bool sc_pinout[TI_GPIO_NPINS];
    127  1.3.2.2  martin 	struct ti_gpio_intr sc_intr[TI_GPIO_NPINS];
    128  1.3.2.2  martin 	device_t sc_gpiodev;
    129  1.3.2.2  martin };
    130  1.3.2.2  martin 
    131  1.3.2.2  martin struct ti_gpio_pin {
    132  1.3.2.2  martin 	struct ti_gpio_softc *pin_sc;
    133  1.3.2.2  martin 	u_int pin_nr;
    134  1.3.2.2  martin 	int pin_flags;
    135  1.3.2.2  martin 	bool pin_actlo;
    136  1.3.2.2  martin };
    137  1.3.2.2  martin 
    138  1.3.2.2  martin #define RD4(sc, reg) 		\
    139  1.3.2.2  martin     bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, ti_gpio_regmap[(sc)->sc_type][(reg)])
    140  1.3.2.2  martin #define WR4(sc, reg, val) 	\
    141  1.3.2.2  martin     bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, ti_gpio_regmap[(sc)->sc_type][(reg)], (val))
    142  1.3.2.2  martin 
    143  1.3.2.2  martin static int	ti_gpio_match(device_t, cfdata_t, void *);
    144  1.3.2.2  martin static void	ti_gpio_attach(device_t, device_t, void *);
    145  1.3.2.2  martin 
    146  1.3.2.2  martin CFATTACH_DECL_NEW(ti_gpio, sizeof(struct ti_gpio_softc),
    147  1.3.2.2  martin 	ti_gpio_match, ti_gpio_attach, NULL, NULL);
    148  1.3.2.2  martin 
    149  1.3.2.2  martin static int
    150  1.3.2.2  martin ti_gpio_ctl(struct ti_gpio_softc *sc, u_int pin, int flags)
    151  1.3.2.2  martin {
    152  1.3.2.2  martin 	uint32_t oe;
    153  1.3.2.2  martin 
    154  1.3.2.2  martin 	KASSERT(mutex_owned(&sc->sc_lock));
    155  1.3.2.2  martin 
    156  1.3.2.2  martin 	oe = RD4(sc, GPIO_OE);
    157  1.3.2.2  martin 	if (flags & GPIO_PIN_INPUT)
    158  1.3.2.2  martin 		oe |= __BIT(pin);
    159  1.3.2.2  martin 	else if (flags & GPIO_PIN_OUTPUT)
    160  1.3.2.2  martin 		oe &= ~__BIT(pin);
    161  1.3.2.2  martin 	WR4(sc, GPIO_OE, oe);
    162  1.3.2.2  martin 
    163  1.3.2.2  martin 	sc->sc_pinout[pin] = (flags & GPIO_PIN_OUTPUT) != 0;
    164  1.3.2.2  martin 
    165  1.3.2.2  martin 	return 0;
    166  1.3.2.2  martin }
    167  1.3.2.2  martin 
    168  1.3.2.2  martin static void *
    169  1.3.2.2  martin ti_gpio_acquire(device_t dev, const void *data, size_t len, int flags)
    170  1.3.2.2  martin {
    171  1.3.2.2  martin 	struct ti_gpio_softc * const sc = device_private(dev);
    172  1.3.2.2  martin 	struct ti_gpio_pin *gpin;
    173  1.3.2.2  martin 	const u_int *gpio = data;
    174  1.3.2.2  martin 	int error;
    175  1.3.2.2  martin 
    176  1.3.2.2  martin 	if (len != 12)
    177  1.3.2.2  martin 		return NULL;
    178  1.3.2.2  martin 
    179  1.3.2.2  martin 	const uint8_t pin = be32toh(gpio[1]) & 0xff;
    180  1.3.2.2  martin 	const bool actlo = be32toh(gpio[2]) & 1;
    181  1.3.2.2  martin 
    182  1.3.2.2  martin 	if (pin >= __arraycount(sc->sc_pins))
    183  1.3.2.2  martin 		return NULL;
    184  1.3.2.2  martin 
    185  1.3.2.2  martin 	mutex_enter(&sc->sc_lock);
    186  1.3.2.2  martin 	error = ti_gpio_ctl(sc, pin, flags);
    187  1.3.2.2  martin 	mutex_exit(&sc->sc_lock);
    188  1.3.2.2  martin 
    189  1.3.2.2  martin 	if (error != 0)
    190  1.3.2.2  martin 		return NULL;
    191  1.3.2.2  martin 
    192  1.3.2.2  martin 	gpin = kmem_zalloc(sizeof(*gpin), KM_SLEEP);
    193  1.3.2.2  martin 	gpin->pin_sc = sc;
    194  1.3.2.2  martin 	gpin->pin_nr = pin;
    195  1.3.2.2  martin 	gpin->pin_flags = flags;
    196  1.3.2.2  martin 	gpin->pin_actlo = actlo;
    197  1.3.2.2  martin 
    198  1.3.2.2  martin 	return gpin;
    199  1.3.2.2  martin }
    200  1.3.2.2  martin 
    201  1.3.2.2  martin static void
    202  1.3.2.2  martin ti_gpio_release(device_t dev, void *priv)
    203  1.3.2.2  martin {
    204  1.3.2.2  martin 	struct ti_gpio_softc * const sc = device_private(dev);
    205  1.3.2.2  martin 	struct ti_gpio_pin *pin = priv;
    206  1.3.2.2  martin 
    207  1.3.2.2  martin 	mutex_enter(&sc->sc_lock);
    208  1.3.2.2  martin 	ti_gpio_ctl(pin->pin_sc, pin->pin_nr, GPIO_PIN_INPUT);
    209  1.3.2.2  martin 	mutex_exit(&sc->sc_lock);
    210  1.3.2.2  martin 
    211  1.3.2.2  martin 	kmem_free(pin, sizeof(*pin));
    212  1.3.2.2  martin }
    213  1.3.2.2  martin 
    214  1.3.2.2  martin static int
    215  1.3.2.2  martin ti_gpio_read(device_t dev, void *priv, bool raw)
    216  1.3.2.2  martin {
    217  1.3.2.2  martin 	struct ti_gpio_softc * const sc = device_private(dev);
    218  1.3.2.2  martin 	struct ti_gpio_pin *pin = priv;
    219  1.3.2.2  martin 	uint32_t data;
    220  1.3.2.2  martin 	int val;
    221  1.3.2.2  martin 
    222  1.3.2.2  martin 	KASSERT(sc == pin->pin_sc);
    223  1.3.2.2  martin 
    224  1.3.2.2  martin 	const uint32_t data_mask = __BIT(pin->pin_nr);
    225  1.3.2.2  martin 
    226  1.3.2.2  martin 	/* No lock required for reads */
    227  1.3.2.2  martin 	if (sc->sc_pinout[pin->pin_nr])
    228  1.3.2.2  martin 		data = RD4(sc, GPIO_DATAOUT);
    229  1.3.2.2  martin 	else
    230  1.3.2.2  martin 		data = RD4(sc, GPIO_DATAIN);
    231  1.3.2.2  martin 	val = __SHIFTOUT(data, data_mask);
    232  1.3.2.2  martin 	if (!raw && pin->pin_actlo)
    233  1.3.2.2  martin 		val = !val;
    234  1.3.2.2  martin 
    235  1.3.2.2  martin 	return val;
    236  1.3.2.2  martin }
    237  1.3.2.2  martin 
    238  1.3.2.2  martin static void
    239  1.3.2.2  martin ti_gpio_write(device_t dev, void *priv, int val, bool raw)
    240  1.3.2.2  martin {
    241  1.3.2.2  martin 	struct ti_gpio_softc * const sc = device_private(dev);
    242  1.3.2.2  martin 	struct ti_gpio_pin *pin = priv;
    243  1.3.2.2  martin 
    244  1.3.2.2  martin 	KASSERT(sc == pin->pin_sc);
    245  1.3.2.2  martin 
    246  1.3.2.2  martin 	const uint32_t data_mask = __BIT(pin->pin_nr);
    247  1.3.2.2  martin 
    248  1.3.2.2  martin 	if (!raw && pin->pin_actlo)
    249  1.3.2.2  martin 		val = !val;
    250  1.3.2.2  martin 
    251  1.3.2.2  martin 	const u_int data_reg = val ? GPIO_SETDATAOUT : GPIO_CLEARDATAOUT;
    252  1.3.2.2  martin 
    253  1.3.2.2  martin 	WR4(sc, data_reg, data_mask);
    254  1.3.2.2  martin }
    255  1.3.2.2  martin 
    256  1.3.2.2  martin static struct fdtbus_gpio_controller_func ti_gpio_funcs = {
    257  1.3.2.2  martin 	.acquire = ti_gpio_acquire,
    258  1.3.2.2  martin 	.release = ti_gpio_release,
    259  1.3.2.2  martin 	.read = ti_gpio_read,
    260  1.3.2.2  martin 	.write = ti_gpio_write,
    261  1.3.2.2  martin };
    262  1.3.2.2  martin 
    263  1.3.2.2  martin static void
    264  1.3.2.2  martin ti_gpio_intr_disestablish(device_t dev, void *ih)
    265  1.3.2.2  martin {
    266  1.3.2.2  martin 	struct ti_gpio_softc * const sc = device_private(dev);
    267  1.3.2.2  martin 	struct ti_gpio_intr *intr = ih;
    268  1.3.2.2  martin 	const u_int pin = intr->intr_pin;
    269  1.3.2.2  martin 	const uint32_t pin_mask = __BIT(pin);
    270  1.3.2.2  martin 	uint32_t val;
    271  1.3.2.2  martin 
    272  1.3.2.2  martin 	/* Disable interrupts */
    273  1.3.2.2  martin 	if (sc->sc_type == TI_GPIO_OMAP3) {
    274  1.3.2.2  martin 		val = RD4(sc, GPIO_IRQENABLE1);
    275  1.3.2.2  martin 		WR4(sc, GPIO_IRQENABLE1, val & ~pin_mask);
    276  1.3.2.2  martin 	} else {
    277  1.3.2.2  martin 		WR4(sc, GPIO_IRQENABLE1_CLR, pin_mask);
    278  1.3.2.2  martin 	}
    279  1.3.2.2  martin 
    280  1.3.2.2  martin 	intr->intr_func = NULL;
    281  1.3.2.2  martin 	intr->intr_arg = NULL;
    282  1.3.2.2  martin }
    283  1.3.2.2  martin 
    284  1.3.2.2  martin static void *
    285  1.3.2.2  martin ti_gpio_intr_establish(device_t dev, u_int *specifier, int ipl, int flags,
    286  1.3.2.2  martin     int (*func)(void *), void *arg)
    287  1.3.2.2  martin {
    288  1.3.2.2  martin 	struct ti_gpio_softc * const sc = device_private(dev);
    289  1.3.2.2  martin 	uint32_t val;
    290  1.3.2.2  martin 
    291  1.3.2.2  martin 	/* 1st cell is the pin */
    292  1.3.2.2  martin 	/* 2nd cell is flags */
    293  1.3.2.2  martin 	const u_int pin = be32toh(specifier[0]);
    294  1.3.2.2  martin 	const u_int type = be32toh(specifier[2]) & 0xf;
    295  1.3.2.2  martin 
    296  1.3.2.2  martin 	if (ipl != IPL_VM || pin >= __arraycount(sc->sc_pins))
    297  1.3.2.2  martin 		return NULL;
    298  1.3.2.2  martin 
    299  1.3.2.2  martin 	/*
    300  1.3.2.2  martin 	 * Enabling both high and low level triggers will cause the GPIO
    301  1.3.2.2  martin 	 * controller to always assert the interrupt.
    302  1.3.2.2  martin 	 */
    303  1.3.2.2  martin 	if ((type & (FDT_INTR_TYPE_LOW_LEVEL|FDT_INTR_TYPE_HIGH_LEVEL)) ==
    304  1.3.2.2  martin 	    (FDT_INTR_TYPE_LOW_LEVEL|FDT_INTR_TYPE_HIGH_LEVEL))
    305  1.3.2.2  martin 		return NULL;
    306  1.3.2.2  martin 
    307  1.3.2.2  martin 	if (sc->sc_intr[pin].intr_func != NULL)
    308  1.3.2.2  martin 		return NULL;
    309  1.3.2.2  martin 
    310  1.3.2.2  martin 	/* Set pin as input */
    311  1.3.2.2  martin 	if (ti_gpio_ctl(sc, pin, GPIO_PIN_INPUT) != 0)
    312  1.3.2.2  martin 		return NULL;
    313  1.3.2.2  martin 
    314  1.3.2.2  martin 	sc->sc_intr[pin].intr_pin = pin;
    315  1.3.2.2  martin 	sc->sc_intr[pin].intr_func = func;
    316  1.3.2.2  martin 	sc->sc_intr[pin].intr_arg = arg;
    317  1.3.2.2  martin 	sc->sc_intr[pin].intr_mpsafe = (flags & FDT_INTR_MPSAFE) != 0;
    318  1.3.2.2  martin 
    319  1.3.2.2  martin 	const uint32_t pin_mask = __BIT(pin);
    320  1.3.2.2  martin 
    321  1.3.2.2  martin 	/* Configure triggers */
    322  1.3.2.2  martin 	val = RD4(sc, GPIO_LEVELDETECT0);
    323  1.3.2.2  martin 	if ((type & FDT_INTR_TYPE_LOW_LEVEL) != 0)
    324  1.3.2.2  martin 		val |= pin_mask;
    325  1.3.2.2  martin 	else
    326  1.3.2.2  martin 		val &= ~pin_mask;
    327  1.3.2.2  martin 	WR4(sc, GPIO_LEVELDETECT0, val);
    328  1.3.2.2  martin 
    329  1.3.2.2  martin 	val = RD4(sc, GPIO_LEVELDETECT1);
    330  1.3.2.2  martin 	if ((type & FDT_INTR_TYPE_HIGH_LEVEL) != 0)
    331  1.3.2.2  martin 		val |= pin_mask;
    332  1.3.2.2  martin 	else
    333  1.3.2.2  martin 		val &= ~pin_mask;
    334  1.3.2.2  martin 	WR4(sc, GPIO_LEVELDETECT1, val);
    335  1.3.2.2  martin 
    336  1.3.2.2  martin 	val = RD4(sc, GPIO_RISINGDETECT);
    337  1.3.2.2  martin 	if ((type & FDT_INTR_TYPE_POS_EDGE) != 0)
    338  1.3.2.2  martin 		val |= pin_mask;
    339  1.3.2.2  martin 	else
    340  1.3.2.2  martin 		val &= ~pin_mask;
    341  1.3.2.2  martin 	WR4(sc, GPIO_RISINGDETECT, val);
    342  1.3.2.2  martin 
    343  1.3.2.2  martin 	val = RD4(sc, GPIO_FALLINGDETECT);
    344  1.3.2.2  martin 	if ((type & FDT_INTR_TYPE_NEG_EDGE) != 0)
    345  1.3.2.2  martin 		val |= pin_mask;
    346  1.3.2.2  martin 	else
    347  1.3.2.2  martin 		val &= ~pin_mask;
    348  1.3.2.2  martin 	WR4(sc, GPIO_FALLINGDETECT, val);
    349  1.3.2.2  martin 
    350  1.3.2.2  martin 	/* Enable interrupts */
    351  1.3.2.2  martin 	if (sc->sc_type == TI_GPIO_OMAP3) {
    352  1.3.2.2  martin 		val = RD4(sc, GPIO_IRQENABLE1);
    353  1.3.2.2  martin 		WR4(sc, GPIO_IRQENABLE1, val | pin_mask);
    354  1.3.2.2  martin 	} else {
    355  1.3.2.2  martin 		WR4(sc, GPIO_IRQENABLE1_SET, pin_mask);
    356  1.3.2.2  martin 	}
    357  1.3.2.2  martin 
    358  1.3.2.2  martin 	return &sc->sc_intr[pin];
    359  1.3.2.2  martin }
    360  1.3.2.2  martin 
    361  1.3.2.2  martin static bool
    362  1.3.2.2  martin ti_gpio_intrstr(device_t dev, u_int *specifier, char *buf, size_t buflen)
    363  1.3.2.2  martin {
    364  1.3.2.2  martin 	struct ti_gpio_softc * const sc = device_private(dev);
    365  1.3.2.2  martin 
    366  1.3.2.2  martin 	/* 1st cell is the pin */
    367  1.3.2.2  martin 	/* 2nd cell is flags */
    368  1.3.2.2  martin 	const u_int pin = be32toh(specifier[0]);
    369  1.3.2.2  martin 
    370  1.3.2.2  martin 	if (pin >= __arraycount(sc->sc_pins))
    371  1.3.2.2  martin 		return false;
    372  1.3.2.2  martin 
    373  1.3.2.2  martin 	snprintf(buf, buflen, "%s pin %d", sc->sc_modname, pin);
    374  1.3.2.2  martin 	return true;
    375  1.3.2.2  martin }
    376  1.3.2.2  martin 
    377  1.3.2.2  martin static struct fdtbus_interrupt_controller_func ti_gpio_intrfuncs = {
    378  1.3.2.2  martin 	.establish = ti_gpio_intr_establish,
    379  1.3.2.2  martin 	.disestablish = ti_gpio_intr_disestablish,
    380  1.3.2.2  martin 	.intrstr = ti_gpio_intrstr,
    381  1.3.2.2  martin };
    382  1.3.2.2  martin 
    383  1.3.2.2  martin static int
    384  1.3.2.2  martin ti_gpio_pin_read(void *priv, int pin)
    385  1.3.2.2  martin {
    386  1.3.2.2  martin 	struct ti_gpio_softc * const sc = priv;
    387  1.3.2.2  martin 	uint32_t data;
    388  1.3.2.2  martin 	int val;
    389  1.3.2.2  martin 
    390  1.3.2.2  martin 	KASSERT(pin < __arraycount(sc->sc_pins));
    391  1.3.2.2  martin 
    392  1.3.2.2  martin 	const uint32_t data_mask = __BIT(pin);
    393  1.3.2.2  martin 
    394  1.3.2.2  martin 	data = RD4(sc, GPIO_DATAIN);
    395  1.3.2.2  martin 	val = __SHIFTOUT(data, data_mask);
    396  1.3.2.2  martin 
    397  1.3.2.2  martin 	return val;
    398  1.3.2.2  martin }
    399  1.3.2.2  martin 
    400  1.3.2.2  martin static void
    401  1.3.2.2  martin ti_gpio_pin_write(void *priv, int pin, int val)
    402  1.3.2.2  martin {
    403  1.3.2.2  martin 	struct ti_gpio_softc * const sc = priv;
    404  1.3.2.2  martin 
    405  1.3.2.2  martin 	KASSERT(pin < __arraycount(sc->sc_pins));
    406  1.3.2.2  martin 
    407  1.3.2.2  martin 	const u_int data_reg = val ? GPIO_SETDATAOUT : GPIO_CLEARDATAOUT;
    408  1.3.2.2  martin 	const uint32_t data_mask = __BIT(pin);
    409  1.3.2.2  martin 
    410  1.3.2.2  martin 	WR4(sc, data_reg, data_mask);
    411  1.3.2.2  martin }
    412  1.3.2.2  martin 
    413  1.3.2.2  martin static void
    414  1.3.2.2  martin ti_gpio_pin_ctl(void *priv, int pin, int flags)
    415  1.3.2.2  martin {
    416  1.3.2.2  martin 	struct ti_gpio_softc * const sc = priv;
    417  1.3.2.2  martin 
    418  1.3.2.2  martin 	KASSERT(pin < __arraycount(sc->sc_pins));
    419  1.3.2.2  martin 
    420  1.3.2.2  martin 	mutex_enter(&sc->sc_lock);
    421  1.3.2.2  martin 	ti_gpio_ctl(sc, pin, flags);
    422  1.3.2.2  martin 	mutex_exit(&sc->sc_lock);
    423  1.3.2.2  martin }
    424  1.3.2.2  martin 
    425  1.3.2.2  martin static void
    426  1.3.2.2  martin ti_gpio_attach_ports(struct ti_gpio_softc *sc)
    427  1.3.2.2  martin {
    428  1.3.2.2  martin 	struct gpio_chipset_tag *gp = &sc->sc_gp;
    429  1.3.2.2  martin 	struct gpiobus_attach_args gba;
    430  1.3.2.2  martin 	u_int pin;
    431  1.3.2.2  martin 
    432  1.3.2.2  martin 	gp->gp_cookie = sc;
    433  1.3.2.2  martin 	gp->gp_pin_read = ti_gpio_pin_read;
    434  1.3.2.2  martin 	gp->gp_pin_write = ti_gpio_pin_write;
    435  1.3.2.2  martin 	gp->gp_pin_ctl = ti_gpio_pin_ctl;
    436  1.3.2.2  martin 
    437  1.3.2.2  martin 	for (pin = 0; pin < __arraycount(sc->sc_pins); pin++) {
    438  1.3.2.2  martin 		sc->sc_pins[pin].pin_num = pin;
    439  1.3.2.2  martin 		sc->sc_pins[pin].pin_caps = GPIO_PIN_INPUT | GPIO_PIN_OUTPUT;
    440  1.3.2.2  martin 		sc->sc_pins[pin].pin_state = ti_gpio_pin_read(sc, pin);
    441  1.3.2.2  martin 	}
    442  1.3.2.2  martin 
    443  1.3.2.2  martin 	memset(&gba, 0, sizeof(gba));
    444  1.3.2.2  martin 	gba.gba_gc = gp;
    445  1.3.2.2  martin 	gba.gba_pins = sc->sc_pins;
    446  1.3.2.2  martin 	gba.gba_npins = __arraycount(sc->sc_pins);
    447  1.3.2.2  martin 	sc->sc_gpiodev = config_found_ia(sc->sc_dev, "gpiobus", &gba, NULL);
    448  1.3.2.2  martin }
    449  1.3.2.2  martin 
    450  1.3.2.2  martin static int
    451  1.3.2.2  martin ti_gpio_intr(void *priv)
    452  1.3.2.2  martin {
    453  1.3.2.2  martin 	struct ti_gpio_softc * const sc = priv;
    454  1.3.2.2  martin 	uint32_t status;
    455  1.3.2.2  martin 	u_int bit;
    456  1.3.2.2  martin 	int rv = 0;
    457  1.3.2.2  martin 
    458  1.3.2.2  martin 	status = RD4(sc, GPIO_IRQSTATUS1);
    459  1.3.2.2  martin 	WR4(sc, GPIO_IRQSTATUS1, status);
    460  1.3.2.2  martin 
    461  1.3.2.2  martin 	while ((bit = ffs32(status)) != 0) {
    462  1.3.2.2  martin 		const u_int pin = bit - 1;
    463  1.3.2.2  martin 		const uint32_t pin_mask = __BIT(pin);
    464  1.3.2.2  martin 		struct ti_gpio_intr *intr = &sc->sc_intr[pin];
    465  1.3.2.2  martin 		status &= ~pin_mask;
    466  1.3.2.2  martin 		if (intr->intr_func == NULL)
    467  1.3.2.2  martin 			continue;
    468  1.3.2.2  martin 		if (!intr->intr_mpsafe)
    469  1.3.2.2  martin 			KERNEL_LOCK(1, curlwp);
    470  1.3.2.2  martin 		rv |= intr->intr_func(intr->intr_arg);
    471  1.3.2.2  martin 		if (!intr->intr_mpsafe)
    472  1.3.2.2  martin 			KERNEL_UNLOCK_ONE(curlwp);
    473  1.3.2.2  martin 	}
    474  1.3.2.2  martin 
    475  1.3.2.2  martin 	return rv;
    476  1.3.2.2  martin }
    477  1.3.2.2  martin 
    478  1.3.2.2  martin static int
    479  1.3.2.2  martin ti_gpio_match(device_t parent, cfdata_t cf, void *aux)
    480  1.3.2.2  martin {
    481  1.3.2.2  martin 	struct fdt_attach_args * const faa = aux;
    482  1.3.2.2  martin 
    483  1.3.2.2  martin 	return of_match_compat_data(faa->faa_phandle, compat_data);
    484  1.3.2.2  martin }
    485  1.3.2.2  martin 
    486  1.3.2.2  martin static void
    487  1.3.2.2  martin ti_gpio_attach(device_t parent, device_t self, void *aux)
    488  1.3.2.2  martin {
    489  1.3.2.2  martin 	struct ti_gpio_softc * const sc = device_private(self);
    490  1.3.2.2  martin 	struct fdt_attach_args * const faa = aux;
    491  1.3.2.2  martin 	const int phandle = faa->faa_phandle;
    492  1.3.2.2  martin 	char intrstr[128];
    493  1.3.2.2  martin 	bus_addr_t addr;
    494  1.3.2.2  martin 	bus_size_t size;
    495  1.3.2.2  martin 
    496  1.3.2.2  martin 	if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
    497  1.3.2.2  martin 		aprint_error(": couldn't get registers\n");
    498  1.3.2.2  martin 		return;
    499  1.3.2.2  martin 	}
    500  1.3.2.2  martin 	if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
    501  1.3.2.2  martin 		aprint_error(": couldn't decode interrupt\n");
    502  1.3.2.2  martin 		return;
    503  1.3.2.2  martin 	}
    504  1.3.2.2  martin 	if (ti_prcm_enable_hwmod(phandle, 0) != 0) {
    505  1.3.2.2  martin 		aprint_error(": couldn't enable module\n");
    506  1.3.2.2  martin 		return;
    507  1.3.2.2  martin 	}
    508  1.3.2.2  martin 
    509  1.3.2.2  martin 	sc->sc_dev = self;
    510  1.3.2.2  martin 	sc->sc_bst = faa->faa_bst;
    511  1.3.2.2  martin 	if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
    512  1.3.2.2  martin 		aprint_error(": couldn't map registers\n");
    513  1.3.2.2  martin 		return;
    514  1.3.2.2  martin 	}
    515  1.3.2.2  martin 	sc->sc_type = of_search_compatible(phandle, compat_data)->data;
    516  1.3.2.2  martin 	mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_VM);
    517  1.3.2.2  martin 
    518  1.3.2.2  martin 	sc->sc_modname = fdtbus_get_string(phandle, "ti,hwmods");
    519  1.3.2.2  martin 	if (sc->sc_modname == NULL)
    520  1.3.2.2  martin 		sc->sc_modname = fdtbus_get_string(OF_parent(phandle), "ti,hwmods");
    521  1.3.2.2  martin 
    522  1.3.2.2  martin 	aprint_naive("\n");
    523  1.3.2.2  martin 	aprint_normal(": GPIO (%s)\n", sc->sc_modname);
    524  1.3.2.2  martin 
    525  1.3.2.2  martin 	fdtbus_register_gpio_controller(self, phandle, &ti_gpio_funcs);
    526  1.3.2.2  martin 
    527  1.3.2.2  martin 	ti_gpio_attach_ports(sc);
    528  1.3.2.2  martin 
    529  1.3.2.2  martin 	sc->sc_ih = fdtbus_intr_establish(phandle, 0, IPL_VM, FDT_INTR_MPSAFE,
    530  1.3.2.2  martin 	    ti_gpio_intr, sc);
    531  1.3.2.2  martin 	if (sc->sc_ih == NULL) {
    532  1.3.2.2  martin 		aprint_error_dev(self, "failed to establish interrupt on %s\n",
    533  1.3.2.2  martin 		    intrstr);
    534  1.3.2.2  martin 		return;
    535  1.3.2.2  martin 	}
    536  1.3.2.2  martin 	aprint_normal_dev(self, "interrupting on %s\n", intrstr);
    537  1.3.2.2  martin 	fdtbus_register_interrupt_controller(self, phandle, &ti_gpio_intrfuncs);
    538  1.3.2.2  martin }
    539