diff options
Diffstat (limited to 'sys/arm/xscale/ixp425/ixp435_ehci.c')
| -rw-r--r-- | sys/arm/xscale/ixp425/ixp435_ehci.c | 357 |
1 files changed, 357 insertions, 0 deletions
diff --git a/sys/arm/xscale/ixp425/ixp435_ehci.c b/sys/arm/xscale/ixp425/ixp435_ehci.c new file mode 100644 index 0000000..b74f73c --- /dev/null +++ b/sys/arm/xscale/ixp425/ixp435_ehci.c @@ -0,0 +1,357 @@ +/*- + * Copyright (c) 2008 Sam Leffler. 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. + */ + +/* + * IXP435 attachment driver for the USB Enhanced Host Controller. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_bus.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/bus.h> +#include <sys/endian.h> +#include <sys/queue.h> +#include <sys/lockmgr.h> +#include <sys/rman.h> + +#include <machine/bus.h> +#include <machine/resource.h> + +#include <dev/usb/usb.h> +#include <dev/usb/usbdi.h> +#include <dev/usb/usbdivar.h> +#include <dev/usb/usb_mem.h> + +#include <dev/usb/ehcireg.h> +#include <dev/usb/ehcivar.h> + +#include <arm/xscale/ixp425/ixp425reg.h> +#include <arm/xscale/ixp425/ixp425var.h> + +#define EHCI_VENDORID_IXP4XX 0x42fa05 +#define EHCI_HC_DEVSTR "IXP4XX Integrated USB 2.0 controller" + +struct ixp_ehci_softc { + ehci_softc_t base; /* storage for EHCI code */ + bus_space_tag_t iot; + bus_space_handle_t ioh; + struct bus_space tag; /* tag for private bus space ops */ +}; + +static int ehci_ixp_detach(device_t self); + +static uint8_t ehci_bs_r_1(void *, bus_space_handle_t, bus_size_t); +static void ehci_bs_w_1(void *, bus_space_handle_t, bus_size_t, u_int8_t); +static uint16_t ehci_bs_r_2(void *, bus_space_handle_t, bus_size_t); +static void ehci_bs_w_2(void *, bus_space_handle_t, bus_size_t, uint16_t); +static uint32_t ehci_bs_r_4(void *, bus_space_handle_t, bus_size_t); +static void ehci_bs_w_4(void *, bus_space_handle_t, bus_size_t, uint32_t); + +static int +ehci_ixp_suspend(device_t self) +{ + ehci_softc_t *sc; + int err; + + err = bus_generic_suspend(self); + if (err == 0) { + sc = device_get_softc(self); + ehci_power(PWR_SUSPEND, sc); + } + return err; +} + +static int +ehci_ixp_resume(device_t self) +{ + ehci_softc_t *sc = device_get_softc(self); + + ehci_power(PWR_RESUME, sc); + bus_generic_resume(self); + return 0; +} + +static int +ehci_ixp_shutdown(device_t self) +{ + ehci_softc_t *sc; + int err; + + err = bus_generic_shutdown(self); + if (err == 0) { + sc = device_get_softc(self); + ehci_shutdown(sc); + } + return err; +} + +static int +ehci_ixp_probe(device_t self) +{ + device_set_desc(self, EHCI_HC_DEVSTR); + return BUS_PROBE_DEFAULT; +} + +static int +ehci_ixp_attach(device_t self) +{ + struct ixp_ehci_softc *isc = device_get_softc(self); + ehci_softc_t *sc = &isc->base; + int err, rid; + + sc->sc_bus.usbrev = USBREV_2_0; + + /* NB: hints fix the memory location and irq */ + + rid = 0; + sc->io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, + &rid, RF_ACTIVE); + if (sc->io_res == NULL) { + device_printf(self, "Could not map memory\n"); + return ENXIO; + } + + /* + * Craft special resource for bus space ops that handle + * byte-alignment of non-word addresses. Also, since + * we're already intercepting bus space ops we handle + * the register window offset that could otherwise be + * done with bus_space_subregion. + */ + isc->iot = rman_get_bustag(sc->io_res); + isc->tag.bs_cookie = isc->iot; + /* read single */ + isc->tag.bs_r_1 = ehci_bs_r_1, + isc->tag.bs_r_2 = ehci_bs_r_2, + isc->tag.bs_r_4 = ehci_bs_r_4, + /* write (single) */ + isc->tag.bs_w_1 = ehci_bs_w_1, + isc->tag.bs_w_2 = ehci_bs_w_2, + isc->tag.bs_w_4 = ehci_bs_w_4, + + sc->iot = &isc->tag; + sc->ioh = rman_get_bushandle(sc->io_res); + sc->sc_size = IXP435_USB1_SIZE - 0x100; + + rid = 0; + sc->irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, + &rid, RF_ACTIVE); + if (sc->irq_res == NULL) { + device_printf(self, "Could not allocate irq\n"); + ehci_ixp_detach(self); + return ENXIO; + } + sc->sc_bus.bdev = device_add_child(self, "usb", -1); + if (!sc->sc_bus.bdev) { + device_printf(self, "Could not add USB device\n"); + ehci_ixp_detach(self); + return ENOMEM; + } + device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus); + + sprintf(sc->sc_vendor, "Intel"); + sc->sc_id_vendor = EHCI_VENDORID_IXP4XX; + + err = bus_setup_intr(self, sc->irq_res, INTR_TYPE_BIO, + NULL, (driver_intr_t*)ehci_intr, sc, &sc->ih); + if (err) { + device_printf(self, "Could not setup irq, %d\n", err); + sc->ih = NULL; + ehci_ixp_detach(self); + return ENXIO; + } + + /* There are no companion USB controllers */ + sc->sc_ncomp = 0; + + /* Allocate a parent dma tag for DMA maps */ + err = bus_dma_tag_create(bus_get_dma_tag(self), 1, 0, + BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, + BUS_SPACE_MAXSIZE_32BIT, USB_DMA_NSEG, BUS_SPACE_MAXSIZE_32BIT, 0, + NULL, NULL, &sc->sc_bus.parent_dmatag); + if (err) { + device_printf(self, "Could not allocate parent DMA tag (%d)\n", + err); + ehci_ixp_detach(self); + return ENXIO; + } + + /* Allocate a dma tag for transfer buffers */ + err = bus_dma_tag_create(sc->sc_bus.parent_dmatag, 1, 0, + BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, + BUS_SPACE_MAXSIZE_32BIT, USB_DMA_NSEG, BUS_SPACE_MAXSIZE_32BIT, 0, + busdma_lock_mutex, &Giant, &sc->sc_bus.buffer_dmatag); + if (err) { + device_printf(self, "Could not allocate buffer DMA tag (%d)\n", + err); + ehci_ixp_detach(self); + return ENXIO; + } + + /* + * Arrange to force Host mode, select big-endian byte alignment, + * and arrange to not terminate reset operations (the adapter + * will ignore it if we do but might as well save a reg write). + * Also, the controller has an embedded Transaction Translator + * which means port speed must be read from the Port Status + * register following a port enable. + */ + sc->sc_flags |= EHCI_SCFLG_SETMODE + | EHCI_SCFLG_NORESTERM + | EHCI_SCFLG_FORCESPEED + | EHCI_SCFLG_BIGEDESC + ; + err = ehci_init(sc); + if (!err) { + sc->sc_flags |= EHCI_SCFLG_DONEINIT; + err = device_probe_and_attach(sc->sc_bus.bdev); + } + + if (err) { + device_printf(self, "USB init failed err=%d\n", err); + ehci_ixp_detach(self); + return EIO; + } + return 0; +} + +static int +ehci_ixp_detach(device_t self) +{ + struct ixp_ehci_softc *isc = device_get_softc(self); + ehci_softc_t *sc = &isc->base; + int err; + + if (sc->sc_flags & EHCI_SCFLG_DONEINIT) { + ehci_detach(sc, 0); + sc->sc_flags &= ~EHCI_SCFLG_DONEINIT; + } + + /* + * Disable interrupts that might have been switched on in ehci_init() + */ + if (sc->iot && sc->ioh) + bus_space_write_4(sc->iot, sc->ioh, EHCI_USBINTR, 0); + if (sc->sc_bus.parent_dmatag != NULL) + bus_dma_tag_destroy(sc->sc_bus.parent_dmatag); + if (sc->sc_bus.buffer_dmatag != NULL) + bus_dma_tag_destroy(sc->sc_bus.buffer_dmatag); + + if (sc->irq_res && sc->ih) { + err = bus_teardown_intr(self, sc->irq_res, sc->ih); + + if (err) + device_printf(self, "Could not tear down irq, %d\n", + err); + sc->ih = NULL; + } + if (sc->sc_bus.bdev != NULL) { + device_delete_child(self, sc->sc_bus.bdev); + sc->sc_bus.bdev = NULL; + } + if (sc->irq_res != NULL) { + bus_release_resource(self, SYS_RES_IRQ, 0, sc->irq_res); + sc->irq_res = NULL; + } + if (sc->io_res != NULL) { + bus_release_resource(self, SYS_RES_MEMORY, 0, sc->io_res); + sc->io_res = NULL; + } + sc->iot = 0; + sc->ioh = 0; + return 0; +} + +/* + * Bus space accessors for PIO operations. + */ + +static uint8_t +ehci_bs_r_1(void *t, bus_space_handle_t h, bus_size_t o) +{ + return bus_space_read_1((bus_space_tag_t) t, h, + 0x100 + (o &~ 3) + (3 - (o & 3))); +} + +static void +ehci_bs_w_1(void *t, bus_space_handle_t h, bus_size_t o, u_int8_t v) +{ + panic("%s", __func__); +} + +static uint16_t +ehci_bs_r_2(void *t, bus_space_handle_t h, bus_size_t o) +{ + return bus_space_read_2((bus_space_tag_t) t, h, + 0x100 + (o &~ 3) + (2 - (o & 3))); +} + +static void +ehci_bs_w_2(void *t, bus_space_handle_t h, bus_size_t o, uint16_t v) +{ + panic("%s", __func__); +} + +static uint32_t +ehci_bs_r_4(void *t, bus_space_handle_t h, bus_size_t o) +{ + return bus_space_read_4((bus_space_tag_t) t, h, 0x100 + o); +} + +static void +ehci_bs_w_4(void *t, bus_space_handle_t h, bus_size_t o, uint32_t v) +{ + bus_space_write_4((bus_space_tag_t) t, h, 0x100 + o, v); +} + +static device_method_t ehci_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, ehci_ixp_probe), + DEVMETHOD(device_attach, ehci_ixp_attach), + DEVMETHOD(device_detach, ehci_ixp_detach), + DEVMETHOD(device_suspend, ehci_ixp_suspend), + DEVMETHOD(device_resume, ehci_ixp_resume), + DEVMETHOD(device_shutdown, ehci_ixp_shutdown), + + /* Bus interface */ + DEVMETHOD(bus_print_child, bus_generic_print_child), + + {0, 0} +}; + +static driver_t ehci_driver = { + "ehci", + ehci_methods, + sizeof(struct ixp_ehci_softc), +}; +static devclass_t ehci_devclass; +DRIVER_MODULE(ehci, ixp, ehci_driver, ehci_devclass, 0, 0); |
