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/* $OpenBSD: amldwusb.c,v 1.4 2021/10/24 17:52:26 mpi Exp $ */
/*
* Copyright (c) 2019 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/bus.h>
#include <machine/fdt.h>
#include <arm64/dev/simplebusvar.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_clock.h>
#include <dev/ofw/ofw_misc.h>
#include <dev/ofw/ofw_power.h>
#include <dev/ofw/ofw_regulator.h>
#include <dev/ofw/fdt.h>
/* Glue registers. */
#define U2P_R0(i) (0x00 + (i) * 0x20)
#define U2P_R0_HOST_DEVICE (1 << 0)
#define U2P_R0_POWER_OK (1 << 1)
#define U2P_R0_HAST_MODE (1 << 2)
#define U2P_R0_POWER_ON_RESET (1 << 3)
#define U2P_R0_ID_PULLUP (1 << 4)
#define U2P_R0_DRV_VBUS (1 << 5)
#define U2P_R1(i) (0x04 + (i) * 0x20)
#define U2P_R1_PHY_READY (1 << 0)
#define U2P_R1_ID_DIG (1 << 1)
#define U2P_R1_OTG_SESSION_VALID (1 << 2)
#define U2P_R1_VBUS_VALID (1 << 3)
#define USB_R0 0x80
#define USB_R0_P30_LANE0_TX2RX_LOOPBACK (1 << 17)
#define USB_R0_P30_LANE0_EXT_PCLK_REQ (1 << 18)
#define USB_R0_P30_PCS_RX_LOS_MASK_VAL_MASK (0x3ff << 19)
#define USB_R0_P30_PCS_RX_LOS_MASK_VAL_SHIFT 19
#define USB_R0_U2D_SS_SCALEDOWN_MODE_MASK (0x3 << 29)
#define USB_R0_U2D_SS_SCALEDOWN_MODE_SHIFT 29
#define USB_R0_U2D_ACT (1U << 31)
#define USB_R1 0x84
#define USB_R1_U3H_BIGENDIAN_GS (1 << 0)
#define USB_R1_U3H_PME_ENABLE (1 << 1)
#define USB_R1_U3H_HUB_PORT_OVERCURRENT_MASK (0x7 << 2)
#define USB_R1_U3H_HUB_PORT_OVERCURRENT_SHIFT 2
#define USB_R1_U3H_HUB_PORT_PERM_ATTACH_MASK (0x7 << 7)
#define USB_R1_U3H_HUB_PORT_PERM_ATTACH_SHIFT 7
#define USB_R1_U3H_HOST_U2_PORT_DISABLE_MASK (0x3 << 12)
#define USB_R1_U3H_HOST_U2_PORT_DISABLE_SHIFT 12
#define USB_R1_U3H_HOST_U3_PORT_DISABLE (1 << 16)
#define USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT (1 << 17)
#define USB_R1_U3H_HOST_MSI_ENABLE (1 << 18)
#define USB_R1_U3H_FLADJ_30MHZ_REG_MASK (0x3f << 19)
#define USB_R1_U3H_FLADJ_30MHZ_REG_SHIFT 19
#define USB_R1_P30_PCS_TX_SWING_FULL_MASK (0x7f << 25)
#define USB_R1_P30_PCS_TX_SWING_FULL_SHIFT 25
#define USB_R2 0x88
#define USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK (0x3f << 20)
#define USB_R2_P30_PCS_TX_DEEMPH_3P5DB_SHIFT 20
#define USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK (0x3f << 26)
#define USB_R2_P30_PCS_TX_DEEMPH_6DB_SHIFT 26
#define USB_R3 0x8c
#define USB_R3_P30_SSC_ENABLE (1 << 0)
#define USB_R3_P30_SSC_RANGE_MASK (0x7 << 1)
#define USB_R3_P30_SSC_RANGE_SHIFT 1
#define USB_R3_P30_SSC_REF_CLK_SEL_MASK (0x1ff << 4)
#define USB_R3_P30_SSC_REF_CLK_SEL_SHIFT 4
#define USB_R3_P30_REF_SSP_EN (1 << 13)
#define USB_R4 0x90
#define USB_R4_P21_PORT_RESET_0 (1 << 0)
#define USB_R4_P21_SLEEP_M0 (1 << 1)
#define USB_R4_MEM_PD_MASK (0x3 << 2)
#define USB_R4_MEM_PD_SHIFT 2
#define USB_R4_P21_ONLY (1 << 4)
#define USB_R5 0x94
#define USB_R5_ID_DIG_SYNC (1 << 0)
#define USB_R5_ID_DIG_REG (1 << 1)
#define USB_R5_ID_DIG_CFG_MASK (0x3 << 2)
#define USB_R5_ID_DIG_CFG_SHIFT 2
#define USB_R5_ID_DIG_EN_0 (1 << 4)
#define USB_R5_ID_DIG_EN_1 (1 << 5)
#define USB_R5_ID_DIG_CURR (1 << 6)
#define USB_R5_ID_DIG_IRQ (1 << 7)
#define USB_R5_ID_DIG_TH_MASK (0xff << 8)
#define USB_R5_ID_DIG_TH_SHIFT 8
#define USB_R5_ID_DIG_CNT_MASK (0xff << 16)
#define USB_R5_ID_DIG_CNT_SHIFT 16
#define HREAD4(sc, reg) \
(bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)))
#define HWRITE4(sc, reg, val) \
bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val))
#define HSET4(sc, reg, bits) \
HWRITE4((sc), (reg), HREAD4((sc), (reg)) | (bits))
#define HCLR4(sc, reg, bits) \
HWRITE4((sc), (reg), HREAD4((sc), (reg)) & ~(bits))
struct amldwusb_softc {
struct simplebus_softc sc_sbus;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
};
int amldwusb_match(struct device *, void *, void *);
void amldwusb_attach(struct device *, struct device *, void *);
const struct cfattach amldwusb_ca = {
sizeof(struct amldwusb_softc), amldwusb_match, amldwusb_attach
};
struct cfdriver amldwusb_cd = {
NULL, "amldwusb", DV_DULL
};
void amldwusb_init_usb2(struct amldwusb_softc *);
void amldwusb_init_usb3(struct amldwusb_softc *);
int
amldwusb_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return OF_is_compatible(faa->fa_node, "amlogic,meson-g12a-usb-ctrl");
}
void
amldwusb_attach(struct device *parent, struct device *self, void *aux)
{
struct amldwusb_softc *sc = (struct amldwusb_softc *)self;
struct fdt_attach_args *faa = aux;
uint32_t vbus_supply;
uint32_t reg;
if (faa->fa_nreg < 1) {
printf(": no registers\n");
return;
}
sc->sc_iot = faa->fa_iot;
if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
printf(": can't map registers\n");
return;
}
power_domain_enable(faa->fa_node);
clock_enable_all(faa->fa_node);
reset_assert_all(faa->fa_node);
delay(10);
reset_deassert_all(faa->fa_node);
vbus_supply = OF_getpropint(faa->fa_node, "vbus-supply", 0);
if (vbus_supply)
regulator_enable(vbus_supply);
amldwusb_init_usb2(sc);
reg = HREAD4(sc, USB_R1);
reg &= ~USB_R1_U3H_FLADJ_30MHZ_REG_MASK;
reg |= (0x20 << USB_R1_U3H_FLADJ_30MHZ_REG_SHIFT);
HWRITE4(sc, USB_R1, reg);
HSET4(sc, USB_R5, USB_R5_ID_DIG_EN_0);
HSET4(sc, USB_R5, USB_R5_ID_DIG_EN_1);
reg = HREAD4(sc, USB_R5);
reg &= ~USB_R5_ID_DIG_TH_MASK;
reg |= (0xff << USB_R5_ID_DIG_TH_SHIFT);
HWRITE4(sc, USB_R5, reg);
/* Initialize PHYs. */
phy_enable(faa->fa_node, "usb2-phy0");
phy_enable(faa->fa_node, "usb2-phy1");
/* Only enable USB 3.0 logic and PHY if we have one. */
if (OF_getindex(faa->fa_node, "usb3-phy0", "phy-names") >= 0) {
amldwusb_init_usb3(sc);
phy_enable(faa->fa_node, "usb3-phy0");
}
simplebus_attach(parent, &sc->sc_sbus.sc_dev, faa);
}
void
amldwusb_init_usb2(struct amldwusb_softc *sc)
{
int i;
for (i = 0; i < 3; i++) {
HSET4(sc, U2P_R0(i), U2P_R0_POWER_ON_RESET);
/* We don't support device mode, so always force host mode. */
HSET4(sc, U2P_R0(i), U2P_R0_HOST_DEVICE);
HCLR4(sc, U2P_R0(i), U2P_R0_POWER_ON_RESET);
}
}
void
amldwusb_init_usb3(struct amldwusb_softc *sc)
{
uint32_t reg;
reg = HREAD4(sc, USB_R3);
reg &= ~USB_R3_P30_SSC_RANGE_MASK;
reg |= USB_R3_P30_SSC_ENABLE;
reg |= (2 << USB_R3_P30_SSC_RANGE_SHIFT);
reg |= USB_R3_P30_REF_SSP_EN;
HWRITE4(sc, USB_R3, reg);
delay(2);
reg = HREAD4(sc, USB_R2);
reg &= ~USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK;
reg |= (0x15 << USB_R2_P30_PCS_TX_DEEMPH_3P5DB_SHIFT);
HWRITE4(sc, USB_R2, reg);
reg = HREAD4(sc, USB_R2);
reg &= ~USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK;
reg |= (0x15 << USB_R2_P30_PCS_TX_DEEMPH_6DB_SHIFT);
HWRITE4(sc, USB_R2, reg);
delay(2);
HSET4(sc, USB_R1, USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT);
reg = HREAD4(sc, USB_R1);
reg &= ~USB_R1_P30_PCS_TX_SWING_FULL_MASK;
reg |= (0x7f << USB_R1_P30_PCS_TX_SWING_FULL_SHIFT);
HWRITE4(sc, USB_R1, reg);
}
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