xref: /freebsd/sys/arm/freescale/vybrid/vf_iomuxc.c (revision 9783ea5c9f762c43a4a43f344382e90ce2d53fa8)
15c263f43SRuslan Bukin /*-
2bf636ac4SRuslan Bukin  * Copyright (c) 2013-2014 Ruslan Bukin <br@bsdpad.com>
35c263f43SRuslan Bukin  * All rights reserved.
45c263f43SRuslan Bukin  *
55c263f43SRuslan Bukin  * Redistribution and use in source and binary forms, with or without
65c263f43SRuslan Bukin  * modification, are permitted provided that the following conditions
75c263f43SRuslan Bukin  * are met:
85c263f43SRuslan Bukin  * 1. Redistributions of source code must retain the above copyright
95c263f43SRuslan Bukin  *    notice, this list of conditions and the following disclaimer.
105c263f43SRuslan Bukin  * 2. Redistributions in binary form must reproduce the above copyright
115c263f43SRuslan Bukin  *    notice, this list of conditions and the following disclaimer in the
125c263f43SRuslan Bukin  *    documentation and/or other materials provided with the distribution.
135c263f43SRuslan Bukin  *
145c263f43SRuslan Bukin  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
155c263f43SRuslan Bukin  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
165c263f43SRuslan Bukin  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
175c263f43SRuslan Bukin  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
185c263f43SRuslan Bukin  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
195c263f43SRuslan Bukin  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
205c263f43SRuslan Bukin  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
215c263f43SRuslan Bukin  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
225c263f43SRuslan Bukin  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
235c263f43SRuslan Bukin  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
245c263f43SRuslan Bukin  * SUCH DAMAGE.
255c263f43SRuslan Bukin  */
265c263f43SRuslan Bukin 
275c263f43SRuslan Bukin /*
285c263f43SRuslan Bukin  * Vybrid Family Input/Output Multiplexer Controller (IOMUXC)
295c263f43SRuslan Bukin  * Chapter 5, Vybrid Reference Manual, Rev. 5, 07/2013
305c263f43SRuslan Bukin  */
315c263f43SRuslan Bukin 
325c263f43SRuslan Bukin #include <sys/cdefs.h>
335c263f43SRuslan Bukin __FBSDID("$FreeBSD$");
345c263f43SRuslan Bukin 
355c263f43SRuslan Bukin #include <sys/param.h>
365c263f43SRuslan Bukin #include <sys/systm.h>
375c263f43SRuslan Bukin #include <sys/bus.h>
385c263f43SRuslan Bukin #include <sys/kernel.h>
395c263f43SRuslan Bukin #include <sys/module.h>
405c263f43SRuslan Bukin #include <sys/malloc.h>
415c263f43SRuslan Bukin #include <sys/rman.h>
425c263f43SRuslan Bukin #include <sys/timeet.h>
435c263f43SRuslan Bukin #include <sys/timetc.h>
445c263f43SRuslan Bukin #include <sys/watchdog.h>
455c263f43SRuslan Bukin 
465c263f43SRuslan Bukin #include <dev/fdt/fdt_common.h>
475c263f43SRuslan Bukin #include <dev/ofw/openfirm.h>
485c263f43SRuslan Bukin #include <dev/ofw/ofw_bus.h>
495c263f43SRuslan Bukin #include <dev/ofw/ofw_bus_subr.h>
505c263f43SRuslan Bukin 
515c263f43SRuslan Bukin #include <machine/bus.h>
525c263f43SRuslan Bukin #include <machine/cpu.h>
535c263f43SRuslan Bukin #include <machine/intr.h>
545c263f43SRuslan Bukin 
555c263f43SRuslan Bukin #include <arm/freescale/vybrid/vf_iomuxc.h>
565c263f43SRuslan Bukin #include <arm/freescale/vybrid/vf_common.h>
575c263f43SRuslan Bukin 
585c263f43SRuslan Bukin #define	MUX_MODE_MASK		7
595c263f43SRuslan Bukin #define	MUX_MODE_SHIFT		20
605c263f43SRuslan Bukin #define	MUX_MODE_GPIO		0
615c263f43SRuslan Bukin #define	MUX_MODE_VBUS_EN_OTG	2
625c263f43SRuslan Bukin 
63ee270bbcSRuslan Bukin #define	IBE		(1 << 0)	/* Input Buffer Enable Field */
64ee270bbcSRuslan Bukin #define	OBE		(1 << 1)	/* Output Buffer Enable Field. */
65ee270bbcSRuslan Bukin #define	PUE		(1 << 2)	/* Pull / Keep Select Field. */
66ee270bbcSRuslan Bukin #define	PKE		(1 << 3)	/* Pull / Keep Enable Field. */
67ee270bbcSRuslan Bukin #define	HYS		(1 << 9)	/* Hysteresis Enable Field */
68ee270bbcSRuslan Bukin #define	ODE		(1 << 10)	/* Open Drain Enable Field. */
69ee270bbcSRuslan Bukin #define	SRE		(1 << 11)	/* Slew Rate Field. */
70ee270bbcSRuslan Bukin 
71ee270bbcSRuslan Bukin #define	SPEED_SHIFT		12
72ee270bbcSRuslan Bukin #define	SPEED_MASK		0x3
73ee270bbcSRuslan Bukin #define	SPEED_LOW		0	/* 50 MHz */
74ee270bbcSRuslan Bukin #define	SPEED_MEDIUM		0x1	/* 100 MHz */
75ee270bbcSRuslan Bukin #define	SPEED_HIGH		0x3	/* 200 MHz */
76ee270bbcSRuslan Bukin 
77ee270bbcSRuslan Bukin #define	PUS_SHIFT		4	/* Pull Up / Down Config Field Shift */
78ee270bbcSRuslan Bukin #define	PUS_MASK		0x3
79ee270bbcSRuslan Bukin #define	PUS_100_KOHM_PULL_DOWN	0
80ee270bbcSRuslan Bukin #define	PUS_47_KOHM_PULL_UP	0x1
81ee270bbcSRuslan Bukin #define	PUS_100_KOHM_PULL_UP	0x2
82ee270bbcSRuslan Bukin #define	PUS_22_KOHM_PULL_UP	0x3
83ee270bbcSRuslan Bukin 
84ee270bbcSRuslan Bukin #define	DSE_SHIFT		6	/* Drive Strength Field Shift */
85ee270bbcSRuslan Bukin #define	DSE_MASK		0x7
86ee270bbcSRuslan Bukin #define	DSE_DISABLED		0	/* Output driver disabled */
87ee270bbcSRuslan Bukin #define	DSE_150_OHM		0x1
88ee270bbcSRuslan Bukin #define	DSE_75_OHM		0x2
89ee270bbcSRuslan Bukin #define	DSE_50_OHM		0x3
90ee270bbcSRuslan Bukin #define	DSE_37_OHM		0x4
91ee270bbcSRuslan Bukin #define	DSE_30_OHM		0x5
92ee270bbcSRuslan Bukin #define	DSE_25_OHM		0x6
93ee270bbcSRuslan Bukin #define	DSE_20_OHM		0x7
945c263f43SRuslan Bukin 
95bf636ac4SRuslan Bukin #define	MAX_MUX_LEN		1024
965c263f43SRuslan Bukin 
975c263f43SRuslan Bukin struct iomuxc_softc {
985c263f43SRuslan Bukin 	struct resource		*tmr_res[1];
995c263f43SRuslan Bukin 	bus_space_tag_t		bst;
1005c263f43SRuslan Bukin 	bus_space_handle_t	bsh;
1015c263f43SRuslan Bukin 	device_t		dev;
1025c263f43SRuslan Bukin };
1035c263f43SRuslan Bukin 
1045c263f43SRuslan Bukin static struct resource_spec iomuxc_spec[] = {
1055c263f43SRuslan Bukin 	{ SYS_RES_MEMORY,	0,	RF_ACTIVE },
1065c263f43SRuslan Bukin 	{ -1, 0 }
1075c263f43SRuslan Bukin };
1085c263f43SRuslan Bukin 
1095c263f43SRuslan Bukin static int
1105c263f43SRuslan Bukin iomuxc_probe(device_t dev)
1115c263f43SRuslan Bukin {
1125c263f43SRuslan Bukin 
113add35ed5SIan Lepore 	if (!ofw_bus_status_okay(dev))
114add35ed5SIan Lepore 		return (ENXIO);
115add35ed5SIan Lepore 
1165c263f43SRuslan Bukin 	if (!ofw_bus_is_compatible(dev, "fsl,mvf600-iomuxc"))
1175c263f43SRuslan Bukin 		return (ENXIO);
1185c263f43SRuslan Bukin 
1195c263f43SRuslan Bukin 	device_set_desc(dev, "Vybrid Family IOMUXC Unit");
1205c263f43SRuslan Bukin 	return (BUS_PROBE_DEFAULT);
1215c263f43SRuslan Bukin }
1225c263f43SRuslan Bukin 
1235c263f43SRuslan Bukin static int
124bf636ac4SRuslan Bukin pinmux_set(struct iomuxc_softc *sc)
125bf636ac4SRuslan Bukin {
126bf636ac4SRuslan Bukin 	phandle_t child, parent, root;
127bf636ac4SRuslan Bukin 	pcell_t iomux_config[MAX_MUX_LEN];
128bf636ac4SRuslan Bukin 	int len;
129bf636ac4SRuslan Bukin 	int values;
130bf636ac4SRuslan Bukin 	int pin;
131ee270bbcSRuslan Bukin 	int pin_cfg;
132bf636ac4SRuslan Bukin 	int i;
133bf636ac4SRuslan Bukin 
134bf636ac4SRuslan Bukin 	root = OF_finddevice("/");
135bf636ac4SRuslan Bukin 	len = 0;
136bf636ac4SRuslan Bukin 	parent = root;
137bf636ac4SRuslan Bukin 
138bf636ac4SRuslan Bukin 	/* Find 'iomux_config' prop in the nodes */
139bf636ac4SRuslan Bukin 	for (child = OF_child(parent); child != 0; child = OF_peer(child)) {
140bf636ac4SRuslan Bukin 
141bf636ac4SRuslan Bukin 		/* Find a 'leaf'. Start the search from this node. */
142bf636ac4SRuslan Bukin 		while (OF_child(child)) {
143bf636ac4SRuslan Bukin 			parent = child;
144bf636ac4SRuslan Bukin 			child = OF_child(child);
145bf636ac4SRuslan Bukin 		}
146bf636ac4SRuslan Bukin 
147bf636ac4SRuslan Bukin 		if (!fdt_is_enabled(child))
148bf636ac4SRuslan Bukin 			continue;
149bf636ac4SRuslan Bukin 
150bf636ac4SRuslan Bukin 		if ((len = OF_getproplen(child, "iomux_config")) > 0) {
151*9783ea5cSAndrew Turner 			OF_getencprop(child, "iomux_config", iomux_config, len);
152bf636ac4SRuslan Bukin 
153bf636ac4SRuslan Bukin 			values = len / (sizeof(uint32_t));
154bf636ac4SRuslan Bukin 			for (i = 0; i < values; i += 2) {
155*9783ea5cSAndrew Turner 				pin = iomux_config[i];
156*9783ea5cSAndrew Turner 				pin_cfg = iomux_config[i+1];
157bf636ac4SRuslan Bukin #if 0
158ee270bbcSRuslan Bukin 				device_printf(sc->dev, "Set pin %d to 0x%08x\n",
159ee270bbcSRuslan Bukin 				    pin, pin_cfg);
160bf636ac4SRuslan Bukin #endif
161ee270bbcSRuslan Bukin 				WRITE4(sc, IOMUXC(pin), pin_cfg);
162bf636ac4SRuslan Bukin 			}
163bf636ac4SRuslan Bukin 		}
164bf636ac4SRuslan Bukin 
165bf636ac4SRuslan Bukin 		if (OF_peer(child) == 0) {
166bf636ac4SRuslan Bukin 			/* No more siblings. */
167bf636ac4SRuslan Bukin 			child = parent;
168bf636ac4SRuslan Bukin 			parent = OF_parent(child);
169bf636ac4SRuslan Bukin 		}
170bf636ac4SRuslan Bukin 	}
171bf636ac4SRuslan Bukin 
172bf636ac4SRuslan Bukin 	return (0);
173bf636ac4SRuslan Bukin }
174bf636ac4SRuslan Bukin 
175bf636ac4SRuslan Bukin static int
1765c263f43SRuslan Bukin iomuxc_attach(device_t dev)
1775c263f43SRuslan Bukin {
1785c263f43SRuslan Bukin 	struct iomuxc_softc *sc;
1795c263f43SRuslan Bukin 
1805c263f43SRuslan Bukin 	sc = device_get_softc(dev);
1815c263f43SRuslan Bukin 	sc->dev = dev;
1825c263f43SRuslan Bukin 
1835c263f43SRuslan Bukin 	if (bus_alloc_resources(dev, iomuxc_spec, sc->tmr_res)) {
1845c263f43SRuslan Bukin 		device_printf(dev, "could not allocate resources\n");
1855c263f43SRuslan Bukin 		return (ENXIO);
1865c263f43SRuslan Bukin 	}
1875c263f43SRuslan Bukin 
1885c263f43SRuslan Bukin 	/* Memory interface */
1895c263f43SRuslan Bukin 	sc->bst = rman_get_bustag(sc->tmr_res[0]);
1905c263f43SRuslan Bukin 	sc->bsh = rman_get_bushandle(sc->tmr_res[0]);
1915c263f43SRuslan Bukin 
192bf636ac4SRuslan Bukin 	pinmux_set(sc);
1935c263f43SRuslan Bukin 
1945c263f43SRuslan Bukin 	return (0);
1955c263f43SRuslan Bukin }
1965c263f43SRuslan Bukin 
1975c263f43SRuslan Bukin static device_method_t iomuxc_methods[] = {
1985c263f43SRuslan Bukin 	DEVMETHOD(device_probe,		iomuxc_probe),
1995c263f43SRuslan Bukin 	DEVMETHOD(device_attach,	iomuxc_attach),
2005c263f43SRuslan Bukin 	{ 0, 0 }
2015c263f43SRuslan Bukin };
2025c263f43SRuslan Bukin 
2035c263f43SRuslan Bukin static driver_t iomuxc_driver = {
2045c263f43SRuslan Bukin 	"iomuxc",
2055c263f43SRuslan Bukin 	iomuxc_methods,
2065c263f43SRuslan Bukin 	sizeof(struct iomuxc_softc),
2075c263f43SRuslan Bukin };
2085c263f43SRuslan Bukin 
2095c263f43SRuslan Bukin static devclass_t iomuxc_devclass;
2105c263f43SRuslan Bukin 
2115c263f43SRuslan Bukin DRIVER_MODULE(iomuxc, simplebus, iomuxc_driver, iomuxc_devclass, 0, 0);
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