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/* $OpenBSD: s3c2410.c,v 1.2 2008/12/30 07:30:48 drahn Exp $ */
/* $NetBSD: s3c2410.c,v 1.10 2005/12/11 12:16:51 christos Exp $ */
/*
* Copyright (c) 2003, 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. 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 CORP. ``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 CORP.
* 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, "$NetBSD: s3c2410.c,v 1.10 2005/12/11 12:16:51 christos Exp $");
#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 <arm/s3c2xx0/s3c2410reg.h>
#include <arm/s3c2xx0/s3c2410var.h>
/* prototypes */
int s3c2410_match(struct device *, void *, void *);
void s3c2410_attach(struct device *, struct device *, void *);
int s3c2410_search(struct device *, void *, void *);
/* attach structures */
/*
#if 0
CFATTACH_DECL(ssio, sizeof(struct s3c24x0_softc), s3c2410_match, s3c2410_attach,
NULL, NULL);
#endif
*/
struct cfattach ssio_ca = {
sizeof(struct s3c24x0_softc), s3c2410_match, s3c2410_attach
};
struct cfdriver ssio_cd = {
NULL, "ssio", DV_DULL
};
extern struct bus_space s3c2xx0_bs_tag;
struct s3c2xx0_softc *s3c2xx0_softc;
#ifdef DEBUG_PORTF
volatile uint8_t *portf; /* for debug */
#endif
static int
s3c2410_print(void *aux, const char *name)
{
struct s3c2xx0_attach_args *sa = (struct s3c2xx0_attach_args *) aux;
if (sa->sa_size)
printf(" addr 0x%lx", sa->sa_addr);
if (sa->sa_size > 1)
printf("-0x%lx", sa->sa_addr + sa->sa_size - 1);
if (sa->sa_intr != -1)
printf(" intr %d", sa->sa_intr);
if (sa->sa_index != -1)
printf(" unit %d", sa->sa_index);
return (UNCONF);
}
int
s3c2410_match(struct device *parent, void *match, void *aux)
{
return 1;
}
void
s3c2410_attach(struct device *parent, struct device *self, void *aux)
{
struct s3c24x0_softc *sc = (struct s3c24x0_softc *) self;
bus_space_tag_t iot;
const char *which_registers; /* for panic message */
#define FAIL(which) do { \
which_registers=(which); goto abort; }while(/*CONSTCOND*/0)
s3c2xx0_softc = &(sc->sc_sx);
sc->sc_sx.sc_iot = iot = &s3c2xx0_bs_tag;
if (bus_space_map(iot,
S3C2410_INTCTL_BASE, S3C2410_INTCTL_SIZE,
BUS_SPACE_MAP_LINEAR, &sc->sc_sx.sc_intctl_ioh))
FAIL("intc");
/* tell register addresses to interrupt handler */
s3c2410_intr_init(sc);
/* Map the GPIO registers */
if (bus_space_map(iot, S3C2410_GPIO_BASE, S3C2410_GPIO_SIZE,
0, &sc->sc_sx.sc_gpio_ioh))
FAIL("GPIO");
#ifdef DEBUG_PORTF
{
extern volatile uint8_t *portf;
/* make all ports output */
bus_space_write_2(iot, sc->sc_sx.sc_gpio_ioh, GPIO_PCONF, 0x5555);
portf = (volatile uint8_t *)
((char *)bus_space_vaddr(iot, sc->sc_sx.sc_gpio_ioh) + GPIO_PDATF);
}
#endif
#if 0
/* Map the DMA controller registers */
if (bus_space_map(iot, S3C2410_DMAC_BASE, S3C2410_DMAC_SIZE,
0, &sc->sc_sx.sc_dmach))
FAIL("DMAC");
#endif
/* Memory controller */
if (bus_space_map(iot, S3C2410_MEMCTL_BASE,
S3C24X0_MEMCTL_SIZE, 0, &sc->sc_sx.sc_memctl_ioh))
FAIL("MEMC");
/* Clock manager */
if (bus_space_map(iot, S3C2410_CLKMAN_BASE,
S3C24X0_CLKMAN_SIZE, 0, &sc->sc_sx.sc_clkman_ioh))
FAIL("CLK");
#if 0
/* Real time clock */
if (bus_space_map(iot, S3C2410_RTC_BASE,
S3C24X0_RTC_SIZE, 0, &sc->sc_sx.sc_rtc_ioh))
FAIL("RTC");
#endif
if (bus_space_map(iot, S3C2410_TIMER_BASE,
S3C24X0_TIMER_SIZE, 0, &sc->sc_timer_ioh))
FAIL("TIMER");
/* calculate current clock frequency */
s3c24x0_clock_freq(&sc->sc_sx);
printf(": fclk %d MHz hclk %d MHz pclk %d MHz\n",
sc->sc_sx.sc_fclk / 1000000, sc->sc_sx.sc_hclk / 1000000,
sc->sc_sx.sc_pclk / 1000000);
/* get busdma tag for the platform */
sc->sc_sx.sc_dmat = s3c2xx0_bus_dma_init(&s3c2xx0_bus_dma);
/*
* Attach devices.
*/
config_search(s3c2410_search, self, sc);
return;
abort:
panic("%s: unable to map %s registers",
self->dv_xname, which_registers);
#undef FAIL
}
int
s3c2410_search(struct device * parent, void * c, void *aux)
{
struct s3c24x0_softc *sc = (struct s3c24x0_softc *) parent;
struct s3c2xx0_attach_args aa;
struct cfdata *cf = c;
aa.sa_sc = sc;
aa.sa_iot = sc->sc_sx.sc_iot;
#if 0
aa.sa_addr = cf->cf_loc[SSIOCF_ADDR];
aa.sa_size = cf->cf_loc[SSIOCF_SIZE];
aa.sa_index = cf->cf_loc[SSIOCF_INDEX];
aa.sa_intr = cf->cf_loc[SSIOCF_INTR];
#else
aa.sa_index = cf->cf_loc[0];
aa.sa_addr = cf->cf_loc[1];
aa.sa_size = cf->cf_loc[2];
aa.sa_intr = cf->cf_loc[3];
#endif
aa.sa_dmat = sc->sc_sx.sc_dmat;
config_found(parent, &aa, s3c2410_print);
return 0;
}
/*
* fill sc_pclk, sc_hclk, sc_fclk from values of clock controller register.
*
* s3c24x0_clock_freq2() is meant to be called from kernel startup routines.
* s3c24x0_clock_freq() is for after kernel initialization is done.
*/
void
s3c24x0_clock_freq2(vaddr_t clkman_base, int *fclk, int *hclk, int *pclk)
{
uint32_t pllcon, divn;
int mdiv, pdiv, sdiv;
int f, h, p;
pllcon = *(volatile uint32_t *)(clkman_base + CLKMAN_MPLLCON);
divn = *(volatile uint32_t *)(clkman_base + CLKMAN_CLKDIVN);
mdiv = (pllcon & PLLCON_MDIV_MASK) >> PLLCON_MDIV_SHIFT;
pdiv = (pllcon & PLLCON_PDIV_MASK) >> PLLCON_PDIV_SHIFT;
sdiv = (pllcon & PLLCON_SDIV_MASK) >> PLLCON_SDIV_SHIFT;
f = ((mdiv + 8) * S3C2XX0_XTAL_CLK) / ((pdiv + 2) * (1 << sdiv));
h = f;
if (divn & CLKDIVN_HDIVN)
h /= 2;
p = h;
if (divn & CLKDIVN_PDIVN)
p /= 2;
if (fclk) *fclk = f;
if (hclk) *hclk = h;
if (pclk) *pclk = p;
}
void
s3c24x0_clock_freq(struct s3c2xx0_softc *sc)
{
s3c24x0_clock_freq2(
(vaddr_t)bus_space_vaddr(sc->sc_iot, sc->sc_clkman_ioh),
&sc->sc_fclk, &sc->sc_hclk, &sc->sc_pclk);
}
/*
* Issue software reset command.
* called with MMU off.
*
* S3C2410 doesn't have sowtware reset bit like S3C2800.
* use watch dog timer and make it fire immediately.
*/
void
s3c2410_softreset(void)
{
disable_interrupts(I32_bit|F32_bit);
*(volatile unsigned int *)(S3C2410_WDT_BASE + WDT_WTCON)
= (0 << WTCON_PRESCALE_SHIFT) | WTCON_ENABLE |
WTCON_CLKSEL_16 | WTCON_ENRST;
}
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