NetBSD-5.0.2/sys/arch/arm/imx/imx31_ahb.c
/* $NetBSD: imx31_ahb.c,v 1.3 2008/05/02 22:00:29 martin Exp $ */
/*
* Copyright (c) 2002, 2005 Genetec Corporation. All rights reserved.
* Written by Hiroyuki Bessho for Genetec Corporation.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Genetec Corporation.
* 4. The name of Genetec Corporation may not be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``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 GENETEC CORPORATION
* 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.
*
*
* Autoconfiguration support for the Intel PXA2[15]0 application
* processor. This code is derived from arm/sa11x0/sa11x0.c
*/
/*-
* Copyright (c) 2001, The NetBSD Foundation, Inc. All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by IWAMOTO Toshihiro and Ichiro FUKUHARA.
*
* 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.
*/
/*-
* Copyright (c) 1999
* Shin Takemura and PocketBSD Project. All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the PocketBSD project
* and its contributors.
* 4. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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/cdefs.h>
__KERNEL_RCSID(0, "$Id: imx31_ahb.c,v 1.3 2008/05/02 22:00:29 martin Exp $");
#include "locators.h"
#include "avic.h"
#include "imxgpio.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/reboot.h>
#include <machine/cpu.h>
#include <machine/bus.h>
#include <arm/cpufunc.h>
#include <arm/mainbus/mainbus.h>
#include <machine/intr.h>
#include <arm/imx/imx31reg.h>
#include <arm/imx/imx31var.h>
struct ahb_softc {
struct device sc_dev;
bus_dma_tag_t sc_dmat;
bus_space_tag_t sc_memt;
bus_space_handle_t sc_memh;
};
/* prototypes */
static int ahb_match(device_t, cfdata_t, void *);
static void ahb_attach(device_t, device_t, void *);
static int ahb_search(device_t, cfdata_t, const int *, void *);
static void ahb_attach_critical(struct ahb_softc *);
static int ahbbus_print(void *, const char *);
/* attach structures */
CFATTACH_DECL(ahb, sizeof(struct ahb_softc),
ahb_match, ahb_attach, NULL, NULL);
static struct ahb_softc *ahb_sc;
static int
ahb_match(device_t parent, cfdata_t match, void *aux)
{
return 1;
}
static void
ahb_attach(device_t parent, device_t self, void *aux)
{
struct ahb_softc *sc = (struct ahb_softc *)self;
extern struct bus_space imx31_bs_tag;
struct ahb_attach_args ahba;
ahb_sc = sc;
sc->sc_memt = &imx31_bs_tag;
#if NBUS_DMA_GENERIC > 0
sc->sc_dmat = &imx31_bus_dma_tag;
#else
sc->sc_dmat = 0;
#endif
aprint_normal(": AHB-Lite 2.v6 bus interface\n");
/*
* Attach critical devices
*/
ahb_attach_critical(sc);
/*
* Attach all other devices
*/
ahba.ahba_name = "ahb";
ahba.ahba_memt = sc->sc_memt;
ahba.ahba_dmat = sc->sc_dmat;
config_search_ia(ahb_search, self, "ahb", &ahba);
}
static int
ahb_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
{
struct ahb_attach_args * const ahba = aux;
ahba->ahba_addr = cf->cf_loc[AHBCF_ADDR];
ahba->ahba_size = cf->cf_loc[AHBCF_SIZE];
ahba->ahba_intr = cf->cf_loc[AHBCF_INTR];
ahba->ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE];
if (config_match(parent, cf, ahba))
config_attach(parent, cf, ahba, ahbbus_print);
return 0;
}
static int
ahb_find(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
{
struct ahb_attach_args * const ahba = aux;
struct ahb_attach_args ahba0;
if (strcmp(ahba->ahba_name, "ahb"))
return 0;
if (ahba->ahba_addr != AHBCF_ADDR_DEFAULT
&& ahba->ahba_addr != cf->cf_loc[AHBCF_ADDR])
return 0;
if (ahba->ahba_size != AHBCF_SIZE_DEFAULT
&& ahba->ahba_size != cf->cf_loc[AHBCF_SIZE])
return 0;
if (ahba->ahba_intr != AHBCF_INTR_DEFAULT
&& ahba->ahba_intr != cf->cf_loc[AHBCF_INTR])
return 0;
if (ahba->ahba_irqbase != AHBCF_IRQBASE_DEFAULT
&& ahba->ahba_irqbase != cf->cf_loc[AHBCF_IRQBASE])
return 0;
ahba0 = *ahba;
ahba0.ahba_addr = cf->cf_loc[AHBCF_ADDR];
ahba0.ahba_size = cf->cf_loc[AHBCF_SIZE];
ahba0.ahba_intr = cf->cf_loc[AHBCF_INTR];
ahba0.ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE];
return config_match(parent, cf, &ahba0);
}
#if NAVIC == 0
#error no avic present in config file
#endif
static const struct {
const char *name;
bus_addr_t addr;
bool required;
} critical_devs[] = {
{ .name = "avic", .addr = INTC_BASE, .required = true },
{ .name = "gpio1", .addr = GPIO1_BASE, .required = false },
{ .name = "gpio2", .addr = GPIO2_BASE, .required = false },
{ .name = "gpio3", .addr = GPIO3_BASE, .required = false },
#if 0
{ .name = "dmac", .addr = DMAC_BASE, .required = true },
#endif
};
static void
ahb_attach_critical(struct ahb_softc *sc)
{
struct ahb_attach_args ahba;
cfdata_t cf;
size_t i;
for (i = 0; i < __arraycount(critical_devs); i++) {
ahba.ahba_name = "ahb";
ahba.ahba_memt = sc->sc_memt;
ahba.ahba_dmat = sc->sc_dmat;
ahba.ahba_addr = critical_devs[i].addr;
ahba.ahba_size = AHBCF_SIZE_DEFAULT;
ahba.ahba_intr = AHBCF_INTR_DEFAULT;
ahba.ahba_irqbase = AHBCF_IRQBASE_DEFAULT;
cf = config_search_ia(ahb_find, &sc->sc_dev, "ahb", &ahba);
if (cf == NULL && critical_devs[i].required)
panic("ahb_attach_critical: failed to find %s!",
critical_devs[i].name);
ahba.ahba_addr = cf->cf_loc[AHBCF_ADDR];
ahba.ahba_size = cf->cf_loc[AHBCF_SIZE];
ahba.ahba_intr = cf->cf_loc[AHBCF_INTR];
ahba.ahba_irqbase = cf->cf_loc[AHBCF_IRQBASE];
config_attach(&sc->sc_dev, cf, &ahba, ahbbus_print);
}
}
static int
ahbbus_print(void *aux, const char *name)
{
struct ahb_attach_args *ahba = (struct ahb_attach_args*)aux;
if (ahba->ahba_addr != AHBCF_ADDR_DEFAULT) {
aprint_normal(" addr 0x%lx", ahba->ahba_addr);
if (ahba->ahba_size > AHBCF_SIZE_DEFAULT)
aprint_normal("-0x%lx",
ahba->ahba_addr + ahba->ahba_size-1);
}
if (ahba->ahba_intr != AHBCF_INTR_DEFAULT)
aprint_normal(" intr %d", ahba->ahba_intr);
if (ahba->ahba_irqbase != AHBCF_IRQBASE_DEFAULT)
aprint_normal(" irqbase %d", ahba->ahba_irqbase);
return (UNCONF);
}
static inline uint32_t
read_clock_counter_xsc1(void)
{
uint32_t x;
__asm volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (x) );
return x;
}
static inline uint32_t
read_clock_counter_xsc2(void)
{
uint32_t x;
__asm volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (x) );
return x;
}