334 lines
8.8 KiB
C
334 lines
8.8 KiB
C
#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*-
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* Copyright (c) 2007-2008 Hans Petter Selasky. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/stdint.h>
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#include <sys/stddef.h>
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/module.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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#include <sys/sysctl.h>
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#include <sys/sx.h>
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#include <sys/unistd.h>
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#include <sys/callout.h>
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#include <sys/malloc.h>
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#include <sys/priv.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usb_core.h>
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#include <dev/usb/usb_busdma.h>
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#include <dev/usb/usb_process.h>
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#include <dev/usb/usb_util.h>
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#include <dev/usb/usb_controller.h>
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#include <dev/usb/usb_bus.h>
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#include <dev/usb/controller/at91dci.h>
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#include <sys/rman.h>
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#include <arm/at91/at91_pmcvar.h>
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#include <arm/at91/at91rm92reg.h>
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#include <arm/at91/at91_pioreg.h>
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#include <arm/at91/at91_piovar.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#define MEM_RID 0
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/* Pin Definitions - do they belong here or somewhere else ? -- YES! */
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#define VBUS_MASK AT91C_PIO_PB24
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#define VBUS_BASE AT91RM92_PIOB_BASE
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#define PULLUP_MASK AT91C_PIO_PB22
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#define PULLUP_BASE AT91RM92_PIOB_BASE
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static device_probe_t at91_udp_probe;
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static device_attach_t at91_udp_attach;
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static device_detach_t at91_udp_detach;
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struct at91_udp_softc {
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struct at91dci_softc sc_dci; /* must be first */
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struct at91_pmc_clock *sc_mclk;
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struct at91_pmc_clock *sc_iclk;
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struct at91_pmc_clock *sc_fclk;
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struct callout sc_vbus;
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};
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static void
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at91_vbus_poll(struct at91_udp_softc *sc)
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{
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uint8_t vbus_val;
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vbus_val = at91_pio_gpio_get(VBUS_BASE, VBUS_MASK) != 0;
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at91dci_vbus_interrupt(&sc->sc_dci, vbus_val);
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callout_reset(&sc->sc_vbus, hz, (void *)&at91_vbus_poll, sc);
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}
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static void
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at91_udp_clocks_on(void *arg)
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{
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struct at91_udp_softc *sc = arg;
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at91_pmc_clock_enable(sc->sc_mclk);
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at91_pmc_clock_enable(sc->sc_iclk);
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at91_pmc_clock_enable(sc->sc_fclk);
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}
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static void
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at91_udp_clocks_off(void *arg)
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{
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struct at91_udp_softc *sc = arg;
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at91_pmc_clock_disable(sc->sc_fclk);
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at91_pmc_clock_disable(sc->sc_iclk);
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at91_pmc_clock_disable(sc->sc_mclk);
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}
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static void
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at91_udp_pull_up(void *arg)
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{
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at91_pio_gpio_set(PULLUP_BASE, PULLUP_MASK);
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}
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static void
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at91_udp_pull_down(void *arg)
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{
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at91_pio_gpio_clear(PULLUP_BASE, PULLUP_MASK);
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}
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static int
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at91_udp_probe(device_t dev)
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{
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if (!ofw_bus_is_compatible(dev, "atmel,at91rm9200-udc"))
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return (ENXIO);
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device_set_desc(dev, "AT91 integrated AT91_UDP controller");
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return (0);
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}
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static int
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at91_udp_attach(device_t dev)
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{
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struct at91_udp_softc *sc = device_get_softc(dev);
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int err;
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int rid;
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/* setup AT9100 USB device controller interface softc */
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sc->sc_dci.sc_clocks_on = &at91_udp_clocks_on;
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sc->sc_dci.sc_clocks_off = &at91_udp_clocks_off;
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sc->sc_dci.sc_clocks_arg = sc;
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sc->sc_dci.sc_pull_up = &at91_udp_pull_up;
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sc->sc_dci.sc_pull_down = &at91_udp_pull_down;
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sc->sc_dci.sc_pull_arg = sc;
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/* initialise some bus fields */
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sc->sc_dci.sc_bus.parent = dev;
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sc->sc_dci.sc_bus.devices = sc->sc_dci.sc_devices;
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sc->sc_dci.sc_bus.devices_max = AT91_MAX_DEVICES;
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/* get all DMA memory */
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if (usb_bus_mem_alloc_all(&sc->sc_dci.sc_bus,
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USB_GET_DMA_TAG(dev), NULL)) {
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return (ENOMEM);
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}
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callout_init_mtx(&sc->sc_vbus, &sc->sc_dci.sc_bus.bus_mtx, 0);
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/*
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* configure VBUS input pin, enable deglitch and enable
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* interrupt :
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*/
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at91_pio_use_gpio(VBUS_BASE, VBUS_MASK);
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at91_pio_gpio_input(VBUS_BASE, VBUS_MASK);
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at91_pio_gpio_set_deglitch(VBUS_BASE, VBUS_MASK, 1);
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at91_pio_gpio_set_interrupt(VBUS_BASE, VBUS_MASK, 0);
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/*
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* configure PULLUP output pin :
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*/
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at91_pio_use_gpio(PULLUP_BASE, PULLUP_MASK);
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at91_pio_gpio_output(PULLUP_BASE, PULLUP_MASK, 0);
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at91_udp_pull_down(sc);
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/* wait 10ms for pulldown to stabilise */
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usb_pause_mtx(NULL, hz / 100);
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sc->sc_mclk = at91_pmc_clock_ref("mck");
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sc->sc_iclk = at91_pmc_clock_ref("udc_clk");
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sc->sc_fclk = at91_pmc_clock_ref("udpck");
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rid = MEM_RID;
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sc->sc_dci.sc_io_res =
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bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
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if (!(sc->sc_dci.sc_io_res)) {
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err = ENOMEM;
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goto error;
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}
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sc->sc_dci.sc_io_tag = rman_get_bustag(sc->sc_dci.sc_io_res);
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sc->sc_dci.sc_io_hdl = rman_get_bushandle(sc->sc_dci.sc_io_res);
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sc->sc_dci.sc_io_size = rman_get_size(sc->sc_dci.sc_io_res);
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rid = 0;
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sc->sc_dci.sc_irq_res =
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bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
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if (!(sc->sc_dci.sc_irq_res)) {
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goto error;
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}
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sc->sc_dci.sc_bus.bdev = device_add_child(dev, "usbus", -1);
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if (!(sc->sc_dci.sc_bus.bdev)) {
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goto error;
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}
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device_set_ivars(sc->sc_dci.sc_bus.bdev, &sc->sc_dci.sc_bus);
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#if (__FreeBSD_version >= 700031)
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err = bus_setup_intr(dev, sc->sc_dci.sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
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NULL, (driver_intr_t *)at91dci_interrupt, sc, &sc->sc_dci.sc_intr_hdl);
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#else
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err = bus_setup_intr(dev, sc->sc_dci.sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
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(driver_intr_t *)at91dci_interrupt, sc, &sc->sc_dci.sc_intr_hdl);
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#endif
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if (err) {
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sc->sc_dci.sc_intr_hdl = NULL;
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goto error;
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}
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err = at91dci_init(&sc->sc_dci);
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if (!err) {
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err = device_probe_and_attach(sc->sc_dci.sc_bus.bdev);
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}
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if (err) {
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goto error;
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} else {
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/* poll VBUS one time */
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USB_BUS_LOCK(&sc->sc_dci.sc_bus);
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at91_vbus_poll(sc);
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USB_BUS_UNLOCK(&sc->sc_dci.sc_bus);
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}
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return (0);
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error:
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at91_udp_detach(dev);
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return (ENXIO);
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}
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static int
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at91_udp_detach(device_t dev)
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{
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struct at91_udp_softc *sc = device_get_softc(dev);
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device_t bdev;
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int err;
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if (sc->sc_dci.sc_bus.bdev) {
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bdev = sc->sc_dci.sc_bus.bdev;
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device_detach(bdev);
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device_delete_child(dev, bdev);
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}
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/* during module unload there are lots of children leftover */
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device_delete_children(dev);
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USB_BUS_LOCK(&sc->sc_dci.sc_bus);
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callout_stop(&sc->sc_vbus);
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USB_BUS_UNLOCK(&sc->sc_dci.sc_bus);
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callout_drain(&sc->sc_vbus);
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/* disable Transceiver */
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AT91_UDP_WRITE_4(&sc->sc_dci, AT91_UDP_TXVC, AT91_UDP_TXVC_DIS);
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/* disable and clear all interrupts */
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AT91_UDP_WRITE_4(&sc->sc_dci, AT91_UDP_IDR, 0xFFFFFFFF);
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AT91_UDP_WRITE_4(&sc->sc_dci, AT91_UDP_ICR, 0xFFFFFFFF);
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if (sc->sc_dci.sc_irq_res && sc->sc_dci.sc_intr_hdl) {
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/*
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* only call at91_udp_uninit() after at91_udp_init()
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*/
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at91dci_uninit(&sc->sc_dci);
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err = bus_teardown_intr(dev, sc->sc_dci.sc_irq_res,
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sc->sc_dci.sc_intr_hdl);
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sc->sc_dci.sc_intr_hdl = NULL;
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}
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if (sc->sc_dci.sc_irq_res) {
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bus_release_resource(dev, SYS_RES_IRQ, 0,
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sc->sc_dci.sc_irq_res);
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sc->sc_dci.sc_irq_res = NULL;
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}
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if (sc->sc_dci.sc_io_res) {
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bus_release_resource(dev, SYS_RES_MEMORY, MEM_RID,
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sc->sc_dci.sc_io_res);
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sc->sc_dci.sc_io_res = NULL;
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}
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usb_bus_mem_free_all(&sc->sc_dci.sc_bus, NULL);
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/* disable clocks */
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at91_pmc_clock_disable(sc->sc_iclk);
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at91_pmc_clock_disable(sc->sc_fclk);
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at91_pmc_clock_disable(sc->sc_mclk);
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at91_pmc_clock_deref(sc->sc_fclk);
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at91_pmc_clock_deref(sc->sc_iclk);
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at91_pmc_clock_deref(sc->sc_mclk);
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return (0);
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}
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static device_method_t at91_udp_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, at91_udp_probe),
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DEVMETHOD(device_attach, at91_udp_attach),
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DEVMETHOD(device_detach, at91_udp_detach),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD_END
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};
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static driver_t at91_udp_driver = {
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.name = "at91_udp",
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.methods = at91_udp_methods,
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.size = sizeof(struct at91_udp_softc),
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};
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static devclass_t at91_udp_devclass;
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DRIVER_MODULE(at91_udp, simplebus, at91_udp_driver, at91_udp_devclass, 0, 0);
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