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/* $OpenBSD: sxiahci.c,v 1.11 2016/08/22 11:24:45 kettenis Exp $ */
/*
* Copyright (c) 2013 Patrick Wildt <patrick@blueri.se>
* Copyright (c) 2013,2014 Artturi Alm
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/queue.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include <dev/ic/ahcireg.h>
#include <dev/ic/ahcivar.h>
#include <armv7/armv7/armv7var.h>
#include <armv7/sunxi/sunxireg.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_clock.h>
#include <dev/ofw/ofw_regulator.h>
#include <dev/ofw/fdt.h>
#define SXIAHCI_CAP 0x0000
#define SXIAHCI_GHC 0x0004
#define SXIAHCI_PI 0x000c
#define SXIAHCI_PHYCS0 0x00c0
#define SXIAHCI_PHYCS1 0x00c4
#define SXIAHCI_PHYCS2 0x00c8
#define SXIAHCI_TIMER1MS 0x00e0
#define SXIAHCI_RWC 0x00fc
#define SXIAHCI_TIMEOUT 0x100000
#define SXIAHCI_PWRPIN 40
#define SXIAHCI_PREG_DMA 0x70
#define SXIAHCI_PREG_DMA_MASK (0xff<<8)
#define SXIAHCI_PREG_DMA_INIT (0x44<<8)
int sxiahci_match(struct device *, void *, void *);
void sxiahci_attach(struct device *, struct device *, void *);
int sxiahci_detach(struct device *, int);
int sxiahci_activate(struct device *, int);
int sxiahci_port_start(struct ahci_port *, int);
extern int ahci_intr(void *);
extern u_int32_t ahci_read(struct ahci_softc *, bus_size_t);
extern void ahci_write(struct ahci_softc *, bus_size_t, u_int32_t);
extern u_int32_t ahci_pread(struct ahci_port *, bus_size_t);
extern void ahci_pwrite(struct ahci_port *, bus_size_t, u_int32_t);
extern int ahci_default_port_start(struct ahci_port *, int);
struct sxiahci_softc {
struct ahci_softc sc;
};
struct cfattach sxiahci_ca = {
sizeof(struct sxiahci_softc),
sxiahci_match,
sxiahci_attach,
sxiahci_detach,
sxiahci_activate
};
struct cfdriver sxiahci_cd = {
NULL, "sxiahci", DV_DULL
};
int
sxiahci_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return OF_is_compatible(faa->fa_node, "allwinner,sun4i-a10-ahci");
}
void
sxiahci_attach(struct device *parent, struct device *self, void *aux)
{
struct sxiahci_softc *sxisc = (struct sxiahci_softc *)self;
struct ahci_softc *sc = &sxisc->sc;
struct fdt_attach_args *faa = aux;
uint32_t target_supply;
uint32_t timo;
if (faa->fa_nreg < 1)
return;
sc->sc_iot = faa->fa_iot;
sc->sc_ios = faa->fa_reg[0].size;
sc->sc_dmat = faa->fa_dmat;
if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
faa->fa_reg[0].size, 0, &sc->sc_ioh))
panic("sxiahci_attach: bus_space_map failed!");
/* enable clocks */
clock_enable_all(faa->fa_node);
delay(5000);
/* XXX setup magix */
SXIWRITE4(sc, SXIAHCI_RWC, 0);
delay(10);
SXISET4(sc, SXIAHCI_PHYCS1, 1 << 19);
delay(10);
SXICMS4(sc, SXIAHCI_PHYCS0, 7 << 24,
1 << 23 | 5 << 24 | 1 << 18);
delay(10);
SXICMS4(sc, SXIAHCI_PHYCS1,
3 << 16 | 0x1f << 8 | 3 << 6,
2 << 16 | 0x06 << 8 | 2 << 6);
delay(10);
SXISET4(sc, SXIAHCI_PHYCS1, 1 << 28 | 1 << 15);
delay(10);
SXICLR4(sc, SXIAHCI_PHYCS1, 1 << 19);
delay(10);
SXICMS4(sc, SXIAHCI_PHYCS0, 0x07 << 20, 0x03 << 20);
SXICMS4(sc, SXIAHCI_PHYCS2, 0x1f << 5, 0x19 << 5);
delay(5000);
SXISET4(sc, SXIAHCI_PHYCS0, 1 << 19);
delay(20);
timo = SXIAHCI_TIMEOUT;
while ((SXIREAD4(sc, SXIAHCI_PHYCS0) >> 28 & 7) != 2 && --timo)
delay(10);
if (!timo) {
printf(": AHCI phy power up failed.\n");
goto dismod;
}
SXISET4(sc, SXIAHCI_PHYCS2, 1 << 24);
timo = SXIAHCI_TIMEOUT;
while ((SXIREAD4(sc, SXIAHCI_PHYCS2) & (1 << 24)) && --timo)
delay(10);
if (!timo) {
printf(": AHCI phy calibration failed.\n");
goto dismod;
}
delay(15000);
SXIWRITE4(sc, SXIAHCI_RWC, 7);
/* power up phy */
target_supply = OF_getpropint(faa->fa_node, "target-supply", 0);
if (target_supply)
regulator_enable(target_supply);
sc->sc_ih = arm_intr_establish_fdt(faa->fa_node, IPL_BIO,
ahci_intr, sc, sc->sc_dev.dv_xname);
if (sc->sc_ih == NULL) {
printf(": unable to establish interrupt\n");
goto clrpwr;
}
printf(":");
SXIWRITE4(sc, SXIAHCI_PI, 1);
SXICLR4(sc, SXIAHCI_CAP, AHCI_REG_CAP_SPM);
sc->sc_flags |= AHCI_F_NO_PMP;
sc->sc_port_start = sxiahci_port_start;
if (ahci_attach(sc) != 0) {
/* error printed by ahci_attach */
goto irq;
}
return;
irq:
arm_intr_disestablish(sc->sc_ih);
clrpwr:
if (target_supply)
regulator_disable(target_supply);
dismod:
clock_disable_all(faa->fa_node);
bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_ios);
}
int
sxiahci_detach(struct device *self, int flags)
{
struct sxiahci_softc *sxisc = (struct sxiahci_softc *) self;
struct ahci_softc *sc = &sxisc->sc;
ahci_detach(sc, flags);
bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_ios);
return 0;
}
int
sxiahci_activate(struct device *self, int act)
{
struct sxiahci_softc *sxisc = (struct sxiahci_softc *) self;
struct ahci_softc *sc = &sxisc->sc;
return ahci_activate((struct device *)sc, act);
}
int
sxiahci_port_start(struct ahci_port *ap, int fre_only)
{
uint32_t r;
/* Setup DMA */
r = ahci_pread(ap, SXIAHCI_PREG_DMA);
r &= ~SXIAHCI_PREG_DMA_MASK;
r |= SXIAHCI_PREG_DMA_INIT; /* XXX if fre_only? */
ahci_pwrite(ap, SXIAHCI_PREG_DMA, r);
return (ahci_default_port_start(ap, fre_only));
}
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