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/* $OpenBSD: tipd.c,v 1.1 2022/12/12 19:18:25 kettenis Exp $ */
/*
* Copyright (c) 2022 Mark Kettenis <kettenis@openbsd.org>
*
* 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/device.h>
#include <sys/malloc.h>
#include <machine/intr.h>
#include <machine/fdt.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_misc.h>
#include <dev/ofw/fdt.h>
#include <dev/i2c/i2cvar.h>
#define TPS_INT_EVENT_1 0x14
#define TPS_INT_EVENT_2 0x15
#define TPS_INT_MASK_1 0x16
#define TPS_INT_MASK_2 0x17
#define TPS_INT_CLEAR_1 0x18
#define TPS_INT_CLEAR_2 0x19
#define TPS_STATUS 0x1a
#define TPS_STATUS_PLUG_PRESENT (1 << 0)
/*
* Interrupt bits on the CD321x controllers used by Apple differ from
* those used by the standard TPS6598x controllers.
*/
#define CD_INT_PLUG_EVENT (1 << 1)
struct tipd_softc {
struct device sc_dev;
i2c_tag_t sc_tag;
i2c_addr_t sc_addr;
void *sc_ih;
struct device_ports sc_ports;
};
int tipd_match(struct device *, void *, void *);
void tipd_attach(struct device *, struct device *, void *);
const struct cfattach tipd_ca = {
sizeof(struct tipd_softc), tipd_match, tipd_attach
};
struct cfdriver tipd_cd = {
NULL, "tipd", DV_DULL
};
int tipd_intr(void *);
int tipd_read_4(struct tipd_softc *, uint8_t, uint32_t *);
int tipd_read_8(struct tipd_softc *, uint8_t, uint64_t *);
int tipd_write_8(struct tipd_softc *, uint8_t, uint64_t);
int
tipd_match(struct device *parent, void *match, void *aux)
{
struct i2c_attach_args *ia = aux;
return iic_is_compatible(ia, "apple,cd321x");
}
void
tipd_attach(struct device *parent, struct device *self, void *aux)
{
struct tipd_softc *sc = (struct tipd_softc *)self;
struct i2c_attach_args *ia = aux;
int node = *(int *)ia->ia_cookie;
sc->sc_tag = ia->ia_tag;
sc->sc_addr = ia->ia_addr;
sc->sc_ih = fdt_intr_establish(node, IPL_BIO, tipd_intr,
sc, sc->sc_dev.dv_xname);
if (sc->sc_ih == NULL) {
printf(": can't establish interrupt\n");
return;
}
printf("\n");
tipd_write_8(sc, TPS_INT_MASK_1, CD_INT_PLUG_EVENT);
node = OF_getnodebyname(node, "connector");
if (node) {
sc->sc_ports.dp_node = node;
device_ports_register(&sc->sc_ports, -1);
}
}
void
tipd_connect(struct tipd_softc *sc)
{
struct endpoint *ep, *rep;
struct usb_controller_port *port;
ep = endpoint_byreg(&sc->sc_ports, 0, -1);
if (ep == NULL)
return;
rep = endpoint_remote(ep);
if (rep == NULL || rep->ep_type != EP_USB_CONTROLLER_PORT)
return;
port = endpoint_get_cookie(rep);
if (port && port->up_connect)
port->up_connect(port->up_cookie);
}
void
tipd_disconnect(struct tipd_softc *sc)
{
struct endpoint *ep, *rep;
struct usb_controller_port *port;
ep = endpoint_byreg(&sc->sc_ports, 0, -1);
if (ep == NULL)
return;
rep = endpoint_remote(ep);
if (rep == NULL || rep->ep_type != EP_USB_CONTROLLER_PORT)
return;
port = endpoint_get_cookie(rep);
if (port && port->up_disconnect)
port->up_disconnect(port->up_cookie);
}
int
tipd_intr(void *arg)
{
struct tipd_softc *sc = arg;
uint64_t event;
uint32_t status;
int error;
error = tipd_read_8(sc, TPS_INT_EVENT_1, &event);
if (error)
return 0;
if (event == 0)
return 0;
if (event & CD_INT_PLUG_EVENT) {
error = tipd_read_4(sc, TPS_STATUS, &status);
if (error)
goto fail;
if (status & TPS_STATUS_PLUG_PRESENT)
tipd_connect(sc);
else
tipd_disconnect(sc);
}
fail:
tipd_write_8(sc, TPS_INT_CLEAR_1, event);
return 1;
}
int
tipd_read_4(struct tipd_softc *sc, uint8_t reg, uint32_t *val)
{
uint8_t buf[5];
int error;
iic_acquire_bus(sc->sc_tag, 0);
error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, ®, sizeof(reg), buf, sizeof(buf), 0);
iic_release_bus(sc->sc_tag, 0);
if (error == 0)
*val = lemtoh32(&buf[1]);
return error;
}
int
tipd_read_8(struct tipd_softc *sc, uint8_t reg, uint64_t *val)
{
uint8_t buf[9];
int error;
iic_acquire_bus(sc->sc_tag, 0);
error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, ®, sizeof(reg), buf, sizeof(buf), 0);
iic_release_bus(sc->sc_tag, 0);
if (error == 0)
*val = lemtoh64(&buf[1]);
return error;
}
int
tipd_write_8(struct tipd_softc *sc, uint8_t reg, uint64_t val)
{
uint8_t buf[9];
int error;
buf[0] = 8;
htolem64(&buf[1], val);
iic_acquire_bus(sc->sc_tag, 0);
error = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
sc->sc_addr, ®, sizeof(reg), buf, sizeof(buf), 0);
iic_release_bus(sc->sc_tag, 0);
return error;
}
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