/* $NetBSD: ti_usbtll.c,v 1.1.2.2 2019/11/27 13:46:44 martin Exp $ */
/*-
* Copyright (c) 2019 Jared McNeill <jmcneill@invisible.ca>
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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: ti_usbtll.c,v 1.1.2.2 2019/11/27 13:46:44 martin Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/mutex.h>
#include <sys/bus.h>
#include <dev/fdt/fdtvar.h>
#include <arm/ti/ti_prcm.h>
#define USBTLL_SYSCONFIG 0x10
#define USBTLL_SYSCONFIG_CLOCKACTIVITY 0x00000100
#define USBTLL_SYSCONFIG_SIDLEMODE 0x00000018
#define USBTLL_SYSCONFIG_ENAWAKEUP 0x00000004
#define USBTLL_SYSCONFIG_SOFTRESET 0x00000002
#define USBTLL_SYSCONFIG_AUTOIDLE 0x00000001
#define USBTLL_SYSSTATUS 0x14
#define USBTLL_SYSSTATUS_RESETDONE 0x00000001
#define USBTLL_SHARED_CONF 0x30
#define USBTLL_SHARED_CONF_USB_90D_DDR_EN 0x00000040
#define USBTLL_SHARED_CONF_USB_180D_SDR_EN 0x00000020
#define USBTLL_SHARED_CONF_USB_DIVRATIO 0x0000001c
#define USBTLL_SHARED_CONF_FCLK_REQ 0x00000002
#define USBTLL_SHARED_CONF_FCLK_IS_ON 0x00000001
#define USBTLL_CHANNEL_CONF(i) (0x40 + (0x04 * (i)))
#define USBTLL_CHANNEL_CONF_FSLSLINESTATE 0x30000000
#define USBTLL_CHANNEL_CONF_FSLSMODE 0x0f000000
#define USBTLL_CHANNEL_CONF_TESTTXSE0 0x00100000
#define USBTLL_CHANNEL_CONF_TESTTXDAT 0x00080000
#define USBTLL_CHANNEL_CONF_TESTTXEN 0x00040000
#define USBTLL_CHANNEL_CONF_TESTEN 0x00020000
#define USBTLL_CHANNEL_CONF_DRVVBUS 0x00010000
#define USBTLL_CHANNEL_CONF_CHRGVBUS 0x00008000
#define USBTLL_CHANNEL_CONF_ULPINOBITSTUFF 0x00000800
#define USBTLL_CHANNEL_CONF_ULPIAUTOIDLE 0x00000400
#define USBTLL_CHANNEL_CONF_UTMIAUTOIDLE 0x00000200
#define USBTLL_CHANNEL_CONF_ULPIDDRMODE 0x00000100
#define USBTLL_CHANNEL_CONF_ULPIOUTCLKMODE 0x00000080
#define USBTLL_CHANNEL_CONF_TLLFULLSPEED 0x00000040
#define USBTLL_CHANNEL_CONF_TLLCONNECT 0x00000020
#define USBTLL_CHANNEL_CONF_TLLATTACH 0x00000010
#define USBTLL_CHANNEL_CONF_UTMIISADEV 0x00000008
#define USBTLL_CHANNEL_CONF_CHANMODE 0x00000006
#define USBTLL_CHANNEL_CONF_CHANEN 0x00000001
static const char * const compatible[] = {
"ti,usbhs-tll",
NULL
};
struct ti_usbtll_softc {
device_t sc_dev;
bus_space_tag_t sc_bst;
bus_space_handle_t sc_bsh;
};
static int ti_usbtll_match(device_t, cfdata_t, void *);
static void ti_usbtll_attach(device_t, device_t, void *);
CFATTACH_DECL_NEW(ti_usbtll, sizeof(struct ti_usbtll_softc),
ti_usbtll_match, ti_usbtll_attach, NULL, NULL);
#define RD4(sc, reg) \
bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg))
#define WR4(sc, reg, val) \
bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val))
static struct ti_usbtll_softc *ti_usbtll_sc = NULL;
void tl_usbtll_enable_port(u_int);
void
tl_usbtll_enable_port(u_int port)
{
struct ti_usbtll_softc *sc = ti_usbtll_sc;
uint32_t val;
if (sc == NULL) {
printf("%s: driver not loaded\n", __func__);
return;
}
val = RD4(sc, USBTLL_CHANNEL_CONF(port));
val &= ~(USBTLL_CHANNEL_CONF_ULPINOBITSTUFF|
USBTLL_CHANNEL_CONF_ULPIAUTOIDLE|
USBTLL_CHANNEL_CONF_ULPIDDRMODE);
val |= USBTLL_CHANNEL_CONF_CHANEN;
WR4(sc, USBTLL_CHANNEL_CONF(port), val);
}
static void
ti_usbtll_reset(struct ti_usbtll_softc *sc)
{
uint32_t val;
int retry = 5000;
WR4(sc, USBTLL_SYSCONFIG, USBTLL_SYSCONFIG_SOFTRESET);
do {
val = RD4(sc, USBTLL_SYSSTATUS);
if (val & USBTLL_SYSSTATUS_RESETDONE)
break;
delay(10);
} while (--retry > 0);
if (retry == 0)
aprint_error_dev(sc->sc_dev, "reset timeout\n");
}
static void
ti_usbtll_init(struct ti_usbtll_softc *sc)
{
uint32_t val;
ti_usbtll_reset(sc);
val = USBTLL_SYSCONFIG_ENAWAKEUP |
USBTLL_SYSCONFIG_AUTOIDLE |
USBTLL_SYSCONFIG_SIDLEMODE |
USBTLL_SYSCONFIG_CLOCKACTIVITY;
WR4(sc, USBTLL_SYSCONFIG, val);
val = RD4(sc, USBTLL_SHARED_CONF);
val |= (USBTLL_SHARED_CONF_FCLK_IS_ON | (1 << 2));
val &= ~USBTLL_SHARED_CONF_USB_90D_DDR_EN;
val &= ~USBTLL_SHARED_CONF_USB_180D_SDR_EN;
WR4(sc, USBTLL_SHARED_CONF, val);
}
static int
ti_usbtll_match(device_t parent, cfdata_t match, void *aux)
{
struct fdt_attach_args * const faa = aux;
return of_match_compatible(faa->faa_phandle, compatible);
}
static void
ti_usbtll_attach(device_t parent, device_t self, void *aux)
{
struct ti_usbtll_softc *sc = device_private(self);
struct fdt_attach_args * const faa = aux;
const int phandle = faa->faa_phandle;
bus_addr_t addr;
bus_size_t size;
if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
aprint_error(": couldn't get registers\n");
return;
}
if (ti_prcm_enable_hwmod(phandle, 0) != 0) {
aprint_error(": couldn't enable module\n");
return;
}
sc->sc_dev = self;
sc->sc_bst = faa->faa_bst;
if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
aprint_error(": couldn't map registers\n");
return;
}
aprint_naive("\n");
aprint_normal(": OMAP HS USB Host TLL\n");
ti_usbtll_init(sc);
if (ti_usbtll_sc == NULL)
ti_usbtll_sc = sc;
}