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/* $Id: imx23_clkctrl.c,v 1.3 2019/10/18 04:09:01 msaitoh Exp $ */
/*
* Copyright (c) 2013 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Petri Laakso.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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/types.h>
#include <sys/bus.h>
#include <sys/cdefs.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <arm/imx/imx23_clkctrlreg.h>
#include <arm/imx/imx23_clkctrlvar.h>
#include <arm/imx/imx23var.h>
typedef struct clkctrl_softc {
device_t sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_hdl;
} *clkctrl_softc_t;
static int clkctrl_match(device_t, cfdata_t, void *);
static void clkctrl_attach(device_t, device_t, void *);
static int clkctrl_activate(device_t, enum devact);
static void clkctrl_init(struct clkctrl_softc *);
static clkctrl_softc_t _sc = NULL;
CFATTACH_DECL3_NEW(clkctrl,
sizeof(struct clkctrl_softc),
clkctrl_match,
clkctrl_attach,
NULL,
clkctrl_activate,
NULL,
NULL,
0
);
#define CLKCTRL_RD(sc, reg) \
bus_space_read_4(sc->sc_iot, sc->sc_hdl, (reg))
#define CLKCTRL_WR(sc, reg, val) \
bus_space_write_4(sc->sc_iot, sc->sc_hdl, (reg), (val))
#define CLKCTRL_SOFT_RST_LOOP 455 /* At least 1 us ... */
static int
clkctrl_match(device_t parent, cfdata_t match, void *aux)
{
struct apb_attach_args *aa = aux;
if ((aa->aa_addr == HW_CLKCTRL_BASE) &&
(aa->aa_size == HW_CLKCTRL_SIZE))
return 1;
return 0;
}
static void
clkctrl_attach(device_t parent, device_t self, void *aux)
{
struct clkctrl_softc *sc = device_private(self);
struct apb_attach_args *aa = aux;
static int clkctrl_attached = 0;
sc->sc_dev = self;
sc->sc_iot = aa->aa_iot;
if (clkctrl_attached) {
aprint_error_dev(sc->sc_dev, "already attached\n");
return;
}
if (bus_space_map(sc->sc_iot, aa->aa_addr, aa->aa_size, 0,
&sc->sc_hdl))
{
aprint_error_dev(sc->sc_dev, "Unable to map bus space\n");
return;
}
clkctrl_init(sc);
aprint_normal("\n");
clkctrl_attached = 1;
return;
}
static int
clkctrl_activate(device_t self, enum devact act)
{
return EOPNOTSUPP;
}
static void
clkctrl_init(struct clkctrl_softc *sc)
{
_sc = sc;
return;
}
/*
* Power up 8-phase PLL outputs for USB PHY
*
*/
void
clkctrl_en_usb(void)
{
struct clkctrl_softc *sc = _sc;
if (sc == NULL) {
aprint_error("clkctrl is not initialized");
return;
}
CLKCTRL_WR(sc, HW_CLKCTRL_PLLCTRL0_SET,
HW_CLKCTRL_PLLCTRL0_EN_USB_CLKS);
return;
}
/*
* Enable 24MHz clock for the Digital Filter.
*
*/
void
clkctrl_en_filtclk(void)
{
struct clkctrl_softc *sc = _sc;
if (sc == NULL) {
aprint_error("clkctrl is not initialized");
return;
}
CLKCTRL_WR(sc, HW_CLKCTRL_XTAL_CLR, HW_CLKCTRL_XTAL_FILT_CLK24M_GATE);
return;
}
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