/sys/mips/mediatek/mtk_usb_phy.c
C | 326 lines | 233 code | 49 blank | 44 comment | 26 complexity | ecc40bb4472fca813cd5167222168de6 MD5 | raw file
- /*-
- * Copyright (c) 2016 Stanislav Galabov.
- * 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. 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.
- *
- * 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>
- __FBSDID("$FreeBSD$");
- #include <sys/stddef.h>
- #include <sys/param.h>
- #include <sys/types.h>
- #include <sys/kernel.h>
- #include <sys/bus.h>
- #include <sys/module.h>
- #include <machine/bus.h>
- #include <dev/fdt/fdt_common.h>
- #include <dev/fdt/fdt_clock.h>
- #include <mips/mediatek/fdt_reset.h>
- #include <dev/ofw/ofw_bus.h>
- #include <dev/ofw/ofw_bus_subr.h>
- #include <mips/mediatek/mtk_sysctl.h>
- #include <mips/mediatek/mtk_soc.h>
- #include <mips/mediatek/mtk_usb_phy.h>
- #define RESET_ASSERT_DELAY 1000
- #define RESET_DEASSERT_DELAY 10000
- struct mtk_usb_phy_softc {
- device_t dev;
- struct resource * res;
- uint32_t fm_base;
- uint32_t u2_base;
- uint32_t sr_coef;
- uint32_t socid;
- };
- #define USB_PHY_READ(_sc, _off) bus_read_4((_sc)->res, (_off))
- #define USB_PHY_WRITE(_sc, _off, _val) bus_write_4((_sc)->res, (_off), (_val))
- #define USB_PHY_CLR_SET(_sc, _off, _clr, _set) \
- USB_PHY_WRITE(_sc, _off, ((USB_PHY_READ(_sc, _off) & ~(_clr)) | (_set)))
- #define USB_PHY_READ_U2(_sc, _off) \
- USB_PHY_READ((_sc), ((_sc)->u2_base + (_off)))
- #define USB_PHY_WRITE_U2(_sc, _off, _val) \
- USB_PHY_WRITE((_sc), ((_sc)->u2_base + (_off)), (_val))
- #define USB_PHY_CLR_SET_U2(_sc, _off, _clr, _set) \
- USB_PHY_WRITE_U2((_sc), (_off), ((USB_PHY_READ_U2((_sc), (_off)) & \
- ~(_clr)) | (_set)))
- #define USB_PHY_BARRIER(_sc) bus_barrier((_sc)->res, 0, 0, \
- BUS_SPACE_BARRIER_WRITE | BUS_SPACE_BARRIER_READ)
- #define USB_PHY_READ_FM(_sc, _off) \
- USB_PHY_READ((_sc), ((_sc)->fm_base + (_off)))
- #define USB_PHY_WRITE_FM(_sc, _off) \
- USB_PHY_WRITE((_sc), ((_sc)->fm_base + (_off)), (_val))
- #define USB_PHY_CLR_SET_FM(_sc, _off, _clr, _set) \
- USB_PHY_WRITE_U2((_sc), (_off), ((USB_PHY_READ_U2((_sc), (_off)) & \
- ~(_clr)) | (_set)))
- static void mtk_usb_phy_mt7621_init(device_t);
- static void mtk_usb_phy_mt7628_init(device_t);
- static struct ofw_compat_data compat_data[] = {
- { "ralink,mt7620-usbphy", MTK_SOC_MT7620A },
- { "mediatek,mt7620-usbphy", MTK_SOC_MT7620A },
- { "ralink,mt7628an-usbphy", MTK_SOC_MT7628 },
- { "ralink,rt3352-usbphy", MTK_SOC_RT3352 },
- { "ralink,rt3050-usbphy", MTK_SOC_RT3050 },
- { NULL, MTK_SOC_UNKNOWN }
- };
- static int
- mtk_usb_phy_probe(device_t dev)
- {
- struct mtk_usb_phy_softc *sc = device_get_softc(dev);
- if (!ofw_bus_status_okay(dev))
- return (ENXIO);
- if ((sc->socid =
- ofw_bus_search_compatible(dev, compat_data)->ocd_data) ==
- MTK_SOC_UNKNOWN)
- return (ENXIO);
- device_set_desc(dev, "MTK USB PHY");
- return (0);
- }
- static int
- mtk_usb_phy_attach(device_t dev)
- {
- struct mtk_usb_phy_softc * sc = device_get_softc(dev);
- phandle_t node;
- uint32_t val;
- int rid;
- sc->dev = dev;
- /* Get our FDT node and SoC id */
- node = ofw_bus_get_node(dev);
- /* Now let's see about setting USB to host or device mode */
- /* XXX: is it the same for all SoCs? */
- val = mtk_sysctl_get(SYSCTL_SYSCFG1);
- if (OF_hasprop(node, "mtk,usb-device"))
- val &= ~SYSCFG1_USB_HOST_MODE;
- else
- val |= SYSCFG1_USB_HOST_MODE;
- mtk_sysctl_set(SYSCTL_SYSCFG1, val);
- /* If we have clocks defined - enable them */
- if (OF_hasprop(node, "clocks"))
- fdt_clock_enable_all(dev);
- /* If we have resets defined - perform a reset sequence */
- if (OF_hasprop(node, "resets")) {
- fdt_reset_assert_all(dev);
- DELAY(RESET_ASSERT_DELAY);
- fdt_reset_deassert_all(dev);
- DELAY(RESET_DEASSERT_DELAY);
- }
- /* Careful, some devices actually require resources */
- if (OF_hasprop(node, "reg")) {
- rid = 0;
- sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
- RF_ACTIVE);
- if (sc->res == NULL) {
- device_printf(dev, "could not map memory\n");
- return (ENXIO);
- }
- } else {
- sc->res = NULL;
- }
- /* Some SoCs require specific USB PHY init... handle these */
- switch (sc->socid) {
- case MTK_SOC_MT7628: /* Fallthrough */
- case MTK_SOC_MT7688:
- if (sc->res == NULL)
- return (ENXIO);
- sc->fm_base = MT7628_FM_FEG_BASE;
- sc->u2_base = MT7628_U2_BASE;
- sc->sr_coef = MT7628_SR_COEF;
- mtk_usb_phy_mt7628_init(dev);
- break;
- case MTK_SOC_MT7621:
- if (sc->res == NULL)
- return (ENXIO);
- sc->fm_base = MT7621_FM_FEG_BASE;
- sc->u2_base = MT7621_U2_BASE;
- sc->sr_coef = MT7621_SR_COEF;
- mtk_usb_phy_mt7621_init(dev);
- break;
- }
- /* We no longer need the resources, release them */
- if (sc->res != NULL)
- bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->res);
- return (0);
- }
- static int
- mtk_usb_phy_detach(device_t dev)
- {
- struct mtk_usb_phy_softc *sc = device_get_softc(dev);
- phandle_t node;
- /* Get our FDT node */
- node = ofw_bus_get_node(dev);
- /* If we have resets defined - assert them */
- if (OF_hasprop(node, "resets"))
- fdt_reset_assert_all(dev);
- /* If we have clocks defined - disable them */
- if (OF_hasprop(node, "clocks"))
- fdt_clock_disable_all(dev);
- /* Finally, release resources, if any were allocated */
- if (sc->res != NULL)
- bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->res);
- return (0);
- }
- /*
- * Things currently seem to work a lot better without slew rate calibration
- * both on MT7621 and MT7688, so we leave it out for now.
- */
- #ifdef notyet
- static void
- mtk_usb_phy_slew_rate_calibration(struct mtk_usb_phy_softc *sc)
- {
- uint32_t val;
- int i;
- USB_PHY_CLR_SET_U2(sc, U2_PHY_ACR0, 0, SRCAL_EN);
- USB_PHY_BARRIER(sc);
- DELAY(1000);
- USB_PHY_CLR_SET_FM(sc, U2_PHY_FMMONR1, 0, FRCK_EN);
- USB_PHY_BARRIER(sc);
- USB_PHY_CLR_SET_FM(sc, U2_PHY_FMCR0, CYCLECNT, 0x400);
- USB_PHY_BARRIER(sc);
- USB_PHY_CLR_SET_FM(sc, U2_PHY_FMCR0, 0, FDET_EN);
- USB_PHY_BARRIER(sc);
- for (i = 0; i < 1000; i++) {
- if ((val = USB_PHY_READ_FM(sc, U2_PHY_FMMONR0)) != 0) {
- device_printf(sc->dev, "DONE with FDET\n");
- break;
- }
- DELAY(10000);
- }
- device_printf(sc->dev, "After FDET\n");
- USB_PHY_CLR_SET_FM(sc, U2_PHY_FMCR0, FDET_EN, 0);
- USB_PHY_BARRIER(sc);
- USB_PHY_CLR_SET_FM(sc, U2_PHY_FMMONR1, FRCK_EN, 0);
- USB_PHY_BARRIER(sc);
- USB_PHY_CLR_SET_U2(sc, U2_PHY_ACR0, SRCAL_EN, 0);
- USB_PHY_BARRIER(sc);
- DELAY(1000);
- if (val == 0) {
- USB_PHY_CLR_SET_U2(sc, U2_PHY_ACR0, SRCTRL, 0x4 << SRCTRL_OFF);
- USB_PHY_BARRIER(sc);
- } else {
- val = ((((1024 * 25 * sc->sr_coef) / val) + 500) / 1000) &
- SRCTRL_MSK;
- USB_PHY_CLR_SET_U2(sc, U2_PHY_ACR0, SRCTRL, val << SRCTRL_OFF);
- USB_PHY_BARRIER(sc);
- }
- }
- #endif
- static void
- mtk_usb_phy_mt7621_init(device_t dev)
- {
- #ifdef notyet
- struct mtk_usb_phy_softc *sc = device_get_softc(dev);
- /* Slew rate calibration only, but for 2 ports */
- mtk_usb_phy_slew_rate_calibration(sc);
- sc->u2_base = MT7621_U2_BASE_P1;
- mtk_usb_phy_slew_rate_calibration(sc);
- #endif
- }
- static void
- mtk_usb_phy_mt7628_init(device_t dev)
- {
- struct mtk_usb_phy_softc *sc = device_get_softc(dev);
- /* XXX: possibly add barriers between the next writes? */
- USB_PHY_WRITE_U2(sc, U2_PHY_DCR0, 0x00ffff02);
- USB_PHY_BARRIER(sc);
- USB_PHY_WRITE_U2(sc, U2_PHY_DCR0, 0x00555502);
- USB_PHY_BARRIER(sc);
- USB_PHY_WRITE_U2(sc, U2_PHY_DCR0, 0x00aaaa02);
- USB_PHY_BARRIER(sc);
- USB_PHY_WRITE_U2(sc, U2_PHY_DCR0, 0x00000402);
- USB_PHY_BARRIER(sc);
- USB_PHY_WRITE_U2(sc, U2_PHY_AC0, 0x0048086a);
- USB_PHY_BARRIER(sc);
- USB_PHY_WRITE_U2(sc, U2_PHY_AC1, 0x4400001c);
- USB_PHY_BARRIER(sc);
- USB_PHY_WRITE_U2(sc, U2_PHY_ACR3, 0xc0200000);
- USB_PHY_BARRIER(sc);
- USB_PHY_WRITE_U2(sc, U2_PHY_DTM0, 0x02000000);
- USB_PHY_BARRIER(sc);
- #ifdef notyet
- /* Slew rate calibration */
- mtk_usb_phy_slew_rate_calibration(sc);
- #endif
- }
- static device_method_t mtk_usb_phy_methods[] = {
- /* Device interface */
- DEVMETHOD(device_probe, mtk_usb_phy_probe),
- DEVMETHOD(device_attach, mtk_usb_phy_attach),
- DEVMETHOD(device_detach, mtk_usb_phy_detach),
- DEVMETHOD(device_suspend, bus_generic_suspend),
- DEVMETHOD(device_resume, bus_generic_resume),
- DEVMETHOD(device_shutdown, bus_generic_shutdown),
- DEVMETHOD_END
- };
- static driver_t mtk_usb_phy_driver = {
- .name = "usbphy",
- .methods = mtk_usb_phy_methods,
- .size = sizeof(struct mtk_usb_phy_softc),
- };
- static devclass_t mtk_usb_phy_devclass;
- DRIVER_MODULE(usbphy, simplebus, mtk_usb_phy_driver, mtk_usb_phy_devclass, 0,
- 0);