freebsd-dev/sys/dev/usb/controller/at91dci_atmelarm.c
Hans Petter Selasky b217d18412 Add 64-bit DMA support in the XHCI controller driver.
- Fix some comments and whitespace while at it.

MFC after:	1 month
Submitted by:	marius@
2015-01-05 20:22:18 +00:00

324 lines
8.5 KiB
C

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*-
* Copyright (c) 2007-2008 Hans Petter Selasky. 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usb_core.h>
#include <dev/usb/usb_busdma.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/usb_util.h>
#include <dev/usb/usb_controller.h>
#include <dev/usb/usb_bus.h>
#include <dev/usb/controller/at91dci.h>
#include <sys/rman.h>
#include <arm/at91/at91_pmcvar.h>
#include <arm/at91/at91rm92reg.h>
#include <arm/at91/at91_pioreg.h>
#include <arm/at91/at91_piovar.h>
#define MEM_RID 0
/* Pin Definitions - do they belong here or somewhere else ? -- YES! */
#define VBUS_MASK AT91C_PIO_PB24
#define VBUS_BASE AT91RM92_PIOB_BASE
#define PULLUP_MASK AT91C_PIO_PB22
#define PULLUP_BASE AT91RM92_PIOB_BASE
static device_probe_t at91_udp_probe;
static device_attach_t at91_udp_attach;
static device_detach_t at91_udp_detach;
struct at91_udp_softc {
struct at91dci_softc sc_dci; /* must be first */
struct at91_pmc_clock *sc_mclk;
struct at91_pmc_clock *sc_iclk;
struct at91_pmc_clock *sc_fclk;
struct callout sc_vbus;
};
static void
at91_vbus_poll(struct at91_udp_softc *sc)
{
uint8_t vbus_val;
vbus_val = at91_pio_gpio_get(VBUS_BASE, VBUS_MASK) != 0;
at91dci_vbus_interrupt(&sc->sc_dci, vbus_val);
callout_reset(&sc->sc_vbus, hz, (void *)&at91_vbus_poll, sc);
}
static void
at91_udp_clocks_on(void *arg)
{
struct at91_udp_softc *sc = arg;
at91_pmc_clock_enable(sc->sc_mclk);
at91_pmc_clock_enable(sc->sc_iclk);
at91_pmc_clock_enable(sc->sc_fclk);
}
static void
at91_udp_clocks_off(void *arg)
{
struct at91_udp_softc *sc = arg;
at91_pmc_clock_disable(sc->sc_fclk);
at91_pmc_clock_disable(sc->sc_iclk);
at91_pmc_clock_disable(sc->sc_mclk);
}
static void
at91_udp_pull_up(void *arg)
{
at91_pio_gpio_set(PULLUP_BASE, PULLUP_MASK);
}
static void
at91_udp_pull_down(void *arg)
{
at91_pio_gpio_clear(PULLUP_BASE, PULLUP_MASK);
}
static int
at91_udp_probe(device_t dev)
{
device_set_desc(dev, "AT91 integrated AT91_UDP controller");
return (0);
}
static int
at91_udp_attach(device_t dev)
{
struct at91_udp_softc *sc = device_get_softc(dev);
int err;
int rid;
/* setup AT9100 USB device controller interface softc */
sc->sc_dci.sc_clocks_on = &at91_udp_clocks_on;
sc->sc_dci.sc_clocks_off = &at91_udp_clocks_off;
sc->sc_dci.sc_clocks_arg = sc;
sc->sc_dci.sc_pull_up = &at91_udp_pull_up;
sc->sc_dci.sc_pull_down = &at91_udp_pull_down;
sc->sc_dci.sc_pull_arg = sc;
/* initialise some bus fields */
sc->sc_dci.sc_bus.parent = dev;
sc->sc_dci.sc_bus.devices = sc->sc_dci.sc_devices;
sc->sc_dci.sc_bus.devices_max = AT91_MAX_DEVICES;
sc->sc_dci.sc_bus.dma_bits = 32;
/* get all DMA memory */
if (usb_bus_mem_alloc_all(&sc->sc_dci.sc_bus,
USB_GET_DMA_TAG(dev), NULL)) {
return (ENOMEM);
}
callout_init_mtx(&sc->sc_vbus, &sc->sc_dci.sc_bus.bus_mtx, 0);
/*
* configure VBUS input pin, enable deglitch and enable
* interrupt :
*/
at91_pio_use_gpio(VBUS_BASE, VBUS_MASK);
at91_pio_gpio_input(VBUS_BASE, VBUS_MASK);
at91_pio_gpio_set_deglitch(VBUS_BASE, VBUS_MASK, 1);
at91_pio_gpio_set_interrupt(VBUS_BASE, VBUS_MASK, 0);
/*
* configure PULLUP output pin :
*/
at91_pio_use_gpio(PULLUP_BASE, PULLUP_MASK);
at91_pio_gpio_output(PULLUP_BASE, PULLUP_MASK, 0);
at91_udp_pull_down(sc);
/* wait 10ms for pulldown to stabilise */
usb_pause_mtx(NULL, hz / 100);
sc->sc_mclk = at91_pmc_clock_ref("mck");
sc->sc_iclk = at91_pmc_clock_ref("udc_clk");
sc->sc_fclk = at91_pmc_clock_ref("udpck");
rid = MEM_RID;
sc->sc_dci.sc_io_res =
bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
if (!(sc->sc_dci.sc_io_res)) {
err = ENOMEM;
goto error;
}
sc->sc_dci.sc_io_tag = rman_get_bustag(sc->sc_dci.sc_io_res);
sc->sc_dci.sc_io_hdl = rman_get_bushandle(sc->sc_dci.sc_io_res);
sc->sc_dci.sc_io_size = rman_get_size(sc->sc_dci.sc_io_res);
rid = 0;
sc->sc_dci.sc_irq_res =
bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
if (!(sc->sc_dci.sc_irq_res)) {
goto error;
}
sc->sc_dci.sc_bus.bdev = device_add_child(dev, "usbus", -1);
if (!(sc->sc_dci.sc_bus.bdev)) {
goto error;
}
device_set_ivars(sc->sc_dci.sc_bus.bdev, &sc->sc_dci.sc_bus);
err = bus_setup_intr(dev, sc->sc_dci.sc_irq_res, INTR_TYPE_TTY | INTR_MPSAFE,
at91dci_filter_interrupt, at91dci_interrupt, sc, &sc->sc_dci.sc_intr_hdl);
if (err) {
sc->sc_dci.sc_intr_hdl = NULL;
goto error;
}
err = at91dci_init(&sc->sc_dci);
if (!err) {
err = device_probe_and_attach(sc->sc_dci.sc_bus.bdev);
}
if (err) {
goto error;
} else {
/* poll VBUS one time */
USB_BUS_LOCK(&sc->sc_dci.sc_bus);
at91_vbus_poll(sc);
USB_BUS_UNLOCK(&sc->sc_dci.sc_bus);
}
return (0);
error:
at91_udp_detach(dev);
return (ENXIO);
}
static int
at91_udp_detach(device_t dev)
{
struct at91_udp_softc *sc = device_get_softc(dev);
device_t bdev;
int err;
if (sc->sc_dci.sc_bus.bdev) {
bdev = sc->sc_dci.sc_bus.bdev;
device_detach(bdev);
device_delete_child(dev, bdev);
}
/* during module unload there are lots of children leftover */
device_delete_children(dev);
USB_BUS_LOCK(&sc->sc_dci.sc_bus);
callout_stop(&sc->sc_vbus);
USB_BUS_UNLOCK(&sc->sc_dci.sc_bus);
callout_drain(&sc->sc_vbus);
/* disable Transceiver */
AT91_UDP_WRITE_4(&sc->sc_dci, AT91_UDP_TXVC, AT91_UDP_TXVC_DIS);
/* disable and clear all interrupts */
AT91_UDP_WRITE_4(&sc->sc_dci, AT91_UDP_IDR, 0xFFFFFFFF);
AT91_UDP_WRITE_4(&sc->sc_dci, AT91_UDP_ICR, 0xFFFFFFFF);
if (sc->sc_dci.sc_irq_res && sc->sc_dci.sc_intr_hdl) {
/*
* only call at91_udp_uninit() after at91_udp_init()
*/
at91dci_uninit(&sc->sc_dci);
err = bus_teardown_intr(dev, sc->sc_dci.sc_irq_res,
sc->sc_dci.sc_intr_hdl);
sc->sc_dci.sc_intr_hdl = NULL;
}
if (sc->sc_dci.sc_irq_res) {
bus_release_resource(dev, SYS_RES_IRQ, 0,
sc->sc_dci.sc_irq_res);
sc->sc_dci.sc_irq_res = NULL;
}
if (sc->sc_dci.sc_io_res) {
bus_release_resource(dev, SYS_RES_MEMORY, MEM_RID,
sc->sc_dci.sc_io_res);
sc->sc_dci.sc_io_res = NULL;
}
usb_bus_mem_free_all(&sc->sc_dci.sc_bus, NULL);
/* disable clocks */
at91_pmc_clock_disable(sc->sc_iclk);
at91_pmc_clock_disable(sc->sc_fclk);
at91_pmc_clock_disable(sc->sc_mclk);
at91_pmc_clock_deref(sc->sc_fclk);
at91_pmc_clock_deref(sc->sc_iclk);
at91_pmc_clock_deref(sc->sc_mclk);
return (0);
}
static device_method_t at91_udp_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, at91_udp_probe),
DEVMETHOD(device_attach, at91_udp_attach),
DEVMETHOD(device_detach, at91_udp_detach),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
static driver_t at91_udp_driver = {
.name = "at91_udp",
.methods = at91_udp_methods,
.size = sizeof(struct at91_udp_softc),
};
static devclass_t at91_udp_devclass;
DRIVER_MODULE(at91_udp, atmelarm, at91_udp_driver, at91_udp_devclass, 0, 0);