/* $NetBSD: imxusb.c,v 1.3 2012/11/12 18:00:37 skrll Exp $ */ /* * Copyright (c) 2009, 2010 Genetec Corporation. All rights reserved. * Written by Hashimoto Kenichi and Hiroyuki Bessho for Genetec Corporation. * * 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 GENETEC CORPORATION ``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 GENETEC CORPORATION * 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 __KERNEL_RCSID(0, "$NetBSD: imxusb.c,v 1.3 2012/11/12 18:00:37 skrll Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "locators.h" #include /* for test */ static int imxehci_match(device_t, cfdata_t, void *); static void imxehci_attach(device_t, device_t, void *); uint8_t imxusb_ulpi_read(struct imxehci_softc *sc, int addr); void imxusb_ulpi_write(struct imxehci_softc *sc, int addr, uint8_t data); static void ulpi_reset(struct imxehci_softc *sc); /* attach structures */ CFATTACH_DECL_NEW(imxehci, sizeof(struct imxehci_softc), imxehci_match, imxehci_attach, NULL, NULL); static int imxehci_match(device_t parent, cfdata_t cf, void *aux) { struct imxusbc_attach_args *aa = aux; if (aa->aa_unit < 0 || 3 < aa->aa_unit) { return 0; } return 1; } static void imxehci_attach(device_t parent, device_t self, void *aux) { struct imxusbc_attach_args *aa = aux; struct imxusbc_softc *usbc = device_private(parent); struct imxehci_softc *sc = device_private(self); ehci_softc_t *hsc = &sc->sc_hsc; bus_space_tag_t iot; uint16_t hcirev; usbd_status r; uint32_t id, hwhost, hwdevice; const char *comma; sc->sc_hsc.sc_dev = self; iot = sc->sc_iot = sc->sc_hsc.iot = aa->aa_iot; sc->sc_unit = aa->aa_unit; sc->sc_usbc = usbc; hsc->sc_bus.hci_private = sc; aprint_normal("\n"); /* per unit registers */ if (bus_space_subregion(iot, aa->aa_ioh, aa->aa_unit * IMXUSB_EHCI_SIZE, IMXUSB_EHCI_SIZE, &sc->sc_ioh) || bus_space_subregion(iot, aa->aa_ioh, aa->aa_unit * IMXUSB_EHCI_SIZE + IMXUSB_EHCIREGS, IMXUSB_EHCI_SIZE - IMXUSB_EHCIREGS, &sc->sc_hsc.ioh)) { aprint_error_dev(self, "can't subregion\n"); return; } id = bus_space_read_4(iot, sc->sc_ioh, IMXUSB_ID); hcirev = bus_space_read_2(iot, sc->sc_hsc.ioh, EHCI_HCIVERSION); aprint_normal_dev(self, "i.MX USB Controller id=%d revision=%d HCI revision=0x%x\n", id & (uint32_t)IMXUSB_ID_ID_MASK, (id & (uint32_t)IMXUSB_ID_REVISION_MASK) >> IMXUSB_ID_REVISION_SHIFT, hcirev); hwhost = bus_space_read_4(iot, sc->sc_ioh, IMXUSB_HWHOST); hwdevice = bus_space_read_4(iot, sc->sc_ioh, IMXUSB_HWDEVICE); aprint_normal_dev(self, ""); comma = ""; if (hwhost & HWHOST_HC) { int n_ports = 1 + ((hwhost & HWHOST_NPORT_MASK) >> HWHOST_NPORT_SHIFT); aprint_normal("%d host port%s", n_ports, n_ports > 1 ? "s" : ""); comma = ", "; } if (hwdevice & HWDEVICE_DC) { int n_endpoints = (hwdevice & HWDEVICE_DEVEP_MASK) >> HWDEVICE_DEVEP_SHIFT; aprint_normal("%sdevice capable, %d endpoint%s", comma, n_endpoints, n_endpoints > 1 ? "s" : ""); } aprint_normal("\n"); sc->sc_hsc.sc_bus.dmatag = aa->aa_dmat; sc->sc_hsc.sc_offs = bus_space_read_1(iot, sc->sc_hsc.ioh, EHCI_CAPLENGTH); /* Platform dependent setup */ if (usbc->sc_init_md_hook) usbc->sc_init_md_hook(sc); imxehci_reset(sc); imxehci_select_interface(sc, sc->sc_iftype); if (sc->sc_iftype == IMXUSBC_IF_ULPI) { bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, 0); aprint_normal_dev(hsc->sc_dev, "ULPI phy VID 0x%04x PID 0x%04x\n", (imxusb_ulpi_read(sc, ULPI_VENDOR_ID_LOW) | imxusb_ulpi_read(sc, ULPI_VENDOR_ID_HIGH) << 8), (imxusb_ulpi_read(sc, ULPI_PRODUCT_ID_LOW) | imxusb_ulpi_read(sc, ULPI_PRODUCT_ID_HIGH) << 8)); ulpi_reset(sc); } imxehci_host_mode(sc); if (usbc->sc_setup_md_hook) usbc->sc_setup_md_hook(sc, IMXUSB_HOST); else if (sc->sc_iftype == IMXUSBC_IF_ULPI) { imxusb_ulpi_write(sc, ULPI_FUNCTION_CONTROL + ULPI_REG_CLEAR, OTG_CONTROL_IDPULLUP); imxusb_ulpi_write(sc, ULPI_OTG_CONTROL + ULPI_REG_SET, OTG_CONTROL_USEEXTVBUSIND | OTG_CONTROL_DRVVBUSEXT | OTG_CONTROL_DRVVBUS | OTG_CONTROL_CHRGVBUS ); } /* Disable interrupts, so we don't get any spurious ones. */ EOWRITE4(hsc, EHCI_USBINTR, 0); intr_establish(aa->aa_irq, IPL_USB, IST_LEVEL, ehci_intr, hsc); /* Figure out vendor for root hub descriptor. */ strlcpy(hsc->sc_vendor, "i.MX", sizeof(hsc->sc_vendor)); r = ehci_init(hsc); if (r != USBD_NORMAL_COMPLETION) { aprint_error_dev(self, "init failed, error=%d\n", r); return; } /* Attach usb device. */ hsc->sc_child = config_found(self, &hsc->sc_bus, usbctlprint); } void imxehci_select_interface(struct imxehci_softc *sc, enum imx_usb_if interface) { uint32_t reg; struct ehci_softc *hsc = &sc->sc_hsc; reg = EOREAD4(hsc, EHCI_PORTSC(1)); reg = (reg & ~PORTSC_PTS_MASK) | (interface << PORTSC_PTS_SHIFT); EOWRITE4(hsc, EHCI_PORTSC(1), reg); } static uint32_t ulpi_wakeup(struct imxehci_softc *sc, int tout) { uint32_t ulpi_view; int i = 0; ulpi_view = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW); if ( !(ulpi_view & ULPI_SS) ) { bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, ULPI_WU); for (i = 0; (tout < 0) || (i < tout); i++) { ulpi_view = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW); if ( !(ulpi_view & ULPI_WU) ) break; delay(1); }; } if ((tout > 0) && (i >= tout)) { aprint_error_dev(sc->sc_hsc.sc_dev, "%s: timeout\n", __func__); } return ulpi_view; } static uint32_t ulpi_wait(struct imxehci_softc *sc, int tout) { uint32_t ulpi_view; int i; ulpi_view = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW); for (i = 0; (tout < 0) | (i < tout); i++) { ulpi_view = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW); if (!(ulpi_view & ULPI_RUN)) break; delay(1); } if ((tout > 0) && (i >= tout)) { aprint_error_dev(sc->sc_hsc.sc_dev, "%s: timeout\n", __func__); } return ulpi_view; } #define TIMEOUT 100000 uint8_t imxusb_ulpi_read(struct imxehci_softc *sc, int addr) { uint32_t data; ulpi_wakeup(sc, TIMEOUT); data = ULPI_RUN | (addr << ULPI_ADDR_SHIFT); bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, data); data = ulpi_wait(sc, TIMEOUT); return (data & ULPI_DATRD_MASK) >> ULPI_DATRD_SHIFT; } void imxusb_ulpi_write(struct imxehci_softc *sc, int addr, uint8_t data) { uint32_t reg; ulpi_wakeup(sc, TIMEOUT); reg = ULPI_RUN | ULPI_RW | ((addr) << ULPI_ADDR_SHIFT) | data; bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, reg); ulpi_wait(sc, TIMEOUT); return; } #if 0 static int ulpi_scratch_test(struct imxehci_softc *sc) { uint32_t ulpi_view; ulpi_view = ulpi_wakeup(sc, 1000); if (ulpi_view & ULPI_WU) { return -1; } bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, (ULPI_RUN | ULPI_RW | (ULPI_SCRATCH << ULPI_ADDR_SHIFT) | 0xAA)); ulpi_view = ulpi_wait(sc, 1000); if (ulpi_view & ULPI_RUN) { return -1; } return 0; } #endif static void ulpi_reset(struct imxehci_softc *sc) { uint8_t data; int timo = 1000 * 1000; /* XXXX: 1sec */ imxusb_ulpi_write(sc, ULPI_FUNCTION_CONTROL + ULPI_REG_SET, FUNCTION_CONTROL_RESET /*0x20*/); do { data = imxusb_ulpi_read(sc, ULPI_FUNCTION_CONTROL); if (!(data & FUNCTION_CONTROL_RESET)) break; delay(100); timo -= 100; } while (timo > 0); if (timo <= 0) { aprint_error_dev(sc->sc_hsc.sc_dev, "%s: reset failed!!\n", __func__); return; } return; } void imxehci_reset(struct imxehci_softc *sc) { uint32_t reg; int i; struct ehci_softc *hsc = &sc->sc_hsc; #define RESET_TIMEOUT 100 reg = EOREAD4(hsc, EHCI_USBCMD); reg &= ~EHCI_CMD_RS; EOWRITE4(hsc, EHCI_USBCMD, reg); for (i=0; i < RESET_TIMEOUT; ++i) { reg = EOREAD4(hsc, EHCI_USBCMD); if ((reg & EHCI_CMD_RS) == 0) break; usb_delay_ms(&hsc->sc_bus, 1); } EOWRITE4(hsc, EHCI_USBCMD, reg | EHCI_CMD_HCRESET); for (i = 0; i < RESET_TIMEOUT; i++) { reg = EOREAD4(hsc, EHCI_USBCMD); if ((reg & EHCI_CMD_HCRESET) == 0) break; usb_delay_ms(&hsc->sc_bus, 1); } if (i >= RESET_TIMEOUT) { aprint_error_dev(hsc->sc_dev, "reset timeout (%x)\n", reg); } usb_delay_ms(&hsc->sc_bus, 100); } void imxehci_host_mode(struct imxehci_softc *sc) { struct ehci_softc *hsc = &sc->sc_hsc; uint32_t reg; reg = EOREAD4(hsc, EHCI_PORTSC(1)); reg &= ~(EHCI_PS_CSC | EHCI_PS_PEC | EHCI_PS_OCC); reg |= EHCI_PS_PP | EHCI_PS_PE; EOWRITE4(hsc, EHCI_PORTSC(1), reg); reg = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IMXUSB_OTGSC); reg |= OTGSC_IDPU; reg |= OTGSC_DPIE | OTGSC_IDIE; bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_OTGSC, reg); reg = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IMXUSB_OTGMODE); reg |= USBMODE_HOST; bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_OTGMODE, reg); }