[bbb-usb.git] / src / sys / arch / armv7 / omap / ammusb.c

/*
 * Copyright (c) 2017 Ian Sutton <ian@ce.gl>
 * Copyright (c) 2013 Oleksandr Tymoshenko <gonzo@freebsd.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kernel.h>

#include <dev/ofw/openfirm.h>
#include <dev/ofw/fdt.h>

#include <machine/fdt.h>

#include <armv7/omap/prcmvar.h>
#include <armv7/omap/sitara_cm.h>

#include <arm/simplebus/simplebusvar.h>

#define DEVNAME(_s) ((_s)->sc_dev.dv_xname)

#define AMMUSB_DEBUG /* XXX */

#ifdef AMMUSB_DEBUG
int ammusb_debug = 20;
#define DPRINTF(n,s)		do { if ((n) <= ammusb_debug) printf s; } while (0)
#else
#define DPRINTF(n,s)		do {}
#endif

#define HREAD4(sc, handle, reg)							\
	(bus_space_read_4((sc)->sc_iot, (handle), (reg)))
#define HWRITE4(sc, handle, reg, val)						\
	bus_space_write_4((sc)->sc_iot, (handle), (reg), (val))
#define HSET4(sc, handle, reg, bits)						\
	HWRITE4((sc), (handle), (reg), HREAD4((sc), (reg)) | (bits))
#define HCLR4(sc, handle, reg, bits)						\
	HWRITE4((sc), (handle), (reg), HREAD4((sc), (reg)) & ~(bits))

enum OTG_STATE {
	OTG_HOST,
	OTG_CLIENT,
};

struct ammusb_softc {
	struct device		sc_dev;
	bus_space_tag_t		sc_iot;
	void			*sc_ih;

	bus_space_handle_t	sc_ioh_ctl;
	bus_size_t		sc_ios_ctl;
	bus_space_handle_t	sc_ioh_core;
	bus_size_t		sc_ios_core;
	bus_space_handle_t	sc_ioh_phy;
	bus_size_t		sc_ios_phy;

	char			sc_phys[32];
	enum OTG_STATE		sc_otg_state;
};

/*  core decl */
int  ammusb_match(struct device *, void *, void *);
void ammusb_attach(struct device *, struct device *, void *);
int  ammusb_detach(struct device *, int);
int  ammusb_intr(void *);
void ammusb_reset(struct ammusb_softc *);

/*  debug decl */
void ammusb_preg(uint32_t, char *, struct ammusb_softc *);
void ammusb_dumpregs(struct ammusb_softc *);

/*  core/iomux.c def */
struct cfattach ammusb_ca = {
	sizeof (struct ammusb_softc), ammusb_match, ammusb_attach, ammusb_detach
};

struct cfdriver ammusb_cd = {
	NULL, "ammusb", DV_DULL
};

int
ammusb_match(struct device *parent, void *v, void *aux)
{
	struct fdt_attach_args *faa = aux;
	return OF_is_compatible(faa->fa_node, "ti,musb-am33xx");
}

void
ammusb_attach(struct device *parent, struct device *self, void *args)
{
	struct ammusb_softc 	*sc = (struct ammusb_softc *) self;
	struct fdt_attach_args *faa = args;

	uint32_t rev, phy_reg[2];
	int phy_node;

	phy_node = -1;

	sc->sc_iot = faa->fa_iot;

	/* find our corresponding PHY regs */
	if ((phy_node = OF_getnodebyphandle(0x3c)) == -1) {
	    printf(": couldn't find PHY\n");
	    return;
	}

	OF_getpropintarray(phy_node, "reg", phy_reg, sizeof(phy_reg));

	if (bus_space_map(sc->sc_iot, phy_reg[0], phy_reg[1], 0,
	    &sc->sc_ioh_phy))
		panic("%s: bus_space_map failed!", __func__);
	if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, faa->fa_reg[0].size, 0,
	    &sc->sc_ioh_core))
		panic("%s: bus_space_map failed!", __func__);
	if (bus_space_map(sc->sc_iot, faa->fa_reg[1].addr, faa->fa_reg[1].size, 0,
	    &sc->sc_ioh_ctl))
		panic("%s: bus_space_map failed!", __func__);

	rev = HREAD4(sc, sc->sc_ioh_ctl, 0x0);
	printf(": rev %d.%d\n", rev >> 4 &0xf, rev & 0xf);
}

int
ammusb_detach(struct device *self, int flags)
{
	return 0; /* XXX */
}

int 
ammusb_intr(void * arg)
{
	return 0; /* XXX */
}
Commit	Line	Data
efe0ef7b	1	/*
	2	* Copyright (c) 2017 Ian Sutton <ian@ce.gl>
	3	* Copyright (c) 2013 Oleksandr Tymoshenko <gonzo@freebsd.org>
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	*
	14	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	15	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	16	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	17	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	18	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	19	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	20	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	21	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	22	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	23	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	24	* SUCH DAMAGE.
	25	*/
	26
	27	#include <sys/param.h>
	28	#include <sys/systm.h>
	29	#include <sys/device.h>
	30	#include <sys/kernel.h>
	31
	32	#include <dev/ofw/openfirm.h>
	33	#include <dev/ofw/fdt.h>
	34
	35	#include <machine/fdt.h>
	36
	37	#include <armv7/omap/prcmvar.h>
	38	#include <armv7/omap/sitara_cm.h>
	39
	40	#include <arm/simplebus/simplebusvar.h>
	41
	42	#define DEVNAME(_s) ((_s)->sc_dev.dv_xname)
	43
	44	#define AMMUSB_DEBUG /* XXX */
	45
	46	#ifdef AMMUSB_DEBUG
	47	int ammusb_debug = 20;
	48	#define DPRINTF(n,s) do { if ((n) <= ammusb_debug) printf s; } while (0)
	49	#else
	50	#define DPRINTF(n,s) do {}
	51	#endif
	52
a6ba6281	53	#define HREAD4(sc, handle, reg) \
	54	(bus_space_read_4((sc)->sc_iot, (handle), (reg)))
	55	#define HWRITE4(sc, handle, reg, val) \
	56	bus_space_write_4((sc)->sc_iot, (handle), (reg), (val))
	57	#define HSET4(sc, handle, reg, bits) \
	58	HWRITE4((sc), (handle), (reg), HREAD4((sc), (reg)) \| (bits))
	59	#define HCLR4(sc, handle, reg, bits) \
	60	HWRITE4((sc), (handle), (reg), HREAD4((sc), (reg)) & ~(bits))
	61
	62	enum OTG_STATE {
	63	OTG_HOST,
	64	OTG_CLIENT,
	65	};
efe0ef7b	66
	67	struct ammusb_softc {
	68	struct device sc_dev;
	69	bus_space_tag_t sc_iot;
efe0ef7b	70	void *sc_ih;
a6ba6281	71
	72	bus_space_handle_t sc_ioh_ctl;
	73	bus_size_t sc_ios_ctl;
	74	bus_space_handle_t sc_ioh_core;
	75	bus_size_t sc_ios_core;
	76	bus_space_handle_t sc_ioh_phy;
	77	bus_size_t sc_ios_phy;
	78
	79	char sc_phys[32];
	80	enum OTG_STATE sc_otg_state;
efe0ef7b	81	};
	82
	83	/* core decl */
	84	int ammusb_match(struct device , void , void *);
	85	void ammusb_attach(struct device , struct device , void *);
	86	int ammusb_detach(struct device *, int);
	87	int ammusb_intr(void *);
	88	void ammusb_reset(struct ammusb_softc *);
	89
	90	/* debug decl */
	91	void ammusb_preg(uint32_t, char , struct ammusb_softc );
	92	void ammusb_dumpregs(struct ammusb_softc *);
	93
	94	/* core/iomux.c def */
	95	struct cfattach ammusb_ca = {
	96	sizeof (struct ammusb_softc), ammusb_match, ammusb_attach, ammusb_detach
	97	};
	98
	99	struct cfdriver ammusb_cd = {
	100	NULL, "ammusb", DV_DULL
	101	};
	102
	103	int
	104	ammusb_match(struct device parent, void v, void *aux)
	105	{
	106	struct fdt_attach_args *faa = aux;
efe0ef7b	107	return OF_is_compatible(faa->fa_node, "ti,musb-am33xx");
	108	}
	109
	110	void
	111	ammusb_attach(struct device parent, struct device self, void *args)
	112	{
	113	struct ammusb_softc sc = (struct ammusb_softc ) self;
	114	struct fdt_attach_args *faa = args;
	115
a6ba6281	116	uint32_t rev, phy_reg[2];
	117	int phy_node;
	118
	119	phy_node = -1;
efe0ef7b	120
efe0ef7b	121	sc->sc_iot = faa->fa_iot;
a6ba6281	122
	123	/* find our corresponding PHY regs */
	124	if ((phy_node = OF_getnodebyphandle(0x3c)) == -1) {
	125	printf(": couldn't find PHY\n");
	126	return;
	127	}
	128
	129	OF_getpropintarray(phy_node, "reg", phy_reg, sizeof(phy_reg));
	130
	131	if (bus_space_map(sc->sc_iot, phy_reg[0], phy_reg[1], 0,
	132	&sc->sc_ioh_phy))
	133	panic("%s: bus_space_map failed!", __func__);
efe0ef7b	134	if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, faa->fa_reg[0].size, 0,
a6ba6281	135	&sc->sc_ioh_core))
	136	panic("%s: bus_space_map failed!", __func__);
	137	if (bus_space_map(sc->sc_iot, faa->fa_reg[1].addr, faa->fa_reg[1].size, 0,
	138	&sc->sc_ioh_ctl))
efe0ef7b	139	panic("%s: bus_space_map failed!", __func__);
efe0ef7b	140
a6ba6281	141	rev = HREAD4(sc, sc->sc_ioh_ctl, 0x0);
cb174232	142	printf(": rev %d.%d\n", rev >> 4 &0xf, rev & 0xf);
efe0ef7b	143	}
	144
	145	int
	146	ammusb_detach(struct device *self, int flags)
	147	{
	148	return 0; /* XXX */
	149	}
	150
	151	int
	152	ammusb_intr(void * arg)
	153	{
	154	return 0; /* XXX */
	155	}