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freebsd-skq/sys/arm/lpc/lpc_ohci.c
Ian Lepore add35ed5b8 Follow r261352 by updating all drivers which are children of simplebus 
to check the status property in their probe routines.

Simplebus used to only instantiate its children whose status="okay"
but that was improper behavior, fixed in r261352.  Now that it doesn't
check anymore and probes all its children; the children all have to
do the check because really only the children know how to properly
interpret their status property strings.

Right now all existing drivers only understand "okay" versus something-
that's-not-okay, so they all use the new ofw_bus_status_okay() helper.
2014-02-02 19:17:28 +00:00

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/*-
* Copyright (c) 2011 Jakub Wojciech Klama <jceel@FreeBSD.org>
* 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/cdefs.h>
__FBSDID("$FreeBSD$");
#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/rman.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <sys/kdb.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.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/ohci.h>
#include <dev/usb/controller/ohcireg.h>
#include <arm/lpc/lpcreg.h>
#include <arm/lpc/lpcvar.h>
#define I2C_START_BIT (1 << 8)
#define I2C_STOP_BIT (1 << 9)
#define I2C_READ 0x01
#define I2C_WRITE 0x00
#define DUMMY_BYTE 0x55
#define lpc_otg_read_4(_sc, _reg) \
bus_space_read_4(_sc->sc_io_tag, _sc->sc_io_hdl, _reg)
#define lpc_otg_write_4(_sc, _reg, _value) \
bus_space_write_4(_sc->sc_io_tag, _sc->sc_io_hdl, _reg, _value)
#define lpc_otg_wait_write_4(_sc, _wreg, _sreg, _value) \
do { \
lpc_otg_write_4(_sc, _wreg, _value); \
while ((lpc_otg_read_4(_sc, _sreg) & _value) != _value); \
} while (0);
static int lpc_ohci_probe(device_t dev);
static int lpc_ohci_attach(device_t dev);
static int lpc_ohci_detach(device_t dev);
static void lpc_otg_i2c_reset(struct ohci_softc *);
static int lpc_isp3101_read(struct ohci_softc *, int);
static void lpc_isp3101_write(struct ohci_softc *, int, int);
static void lpc_isp3101_clear(struct ohci_softc *, int, int);
static void lpc_isp3101_configure(device_t dev, struct ohci_softc *);
static int
lpc_ohci_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "lpc,usb-ohci"))
return (ENXIO);
device_set_desc(dev, "LPC32x0 USB OHCI controller");
return (BUS_PROBE_DEFAULT);
}
static int
lpc_ohci_attach(device_t dev)
{
struct ohci_softc *sc = device_get_softc(dev);
int err;
int rid;
int i = 0;
uint32_t usbctrl;
uint32_t otgstatus;
sc->sc_bus.parent = dev;
sc->sc_bus.devices = sc->sc_devices;
sc->sc_bus.devices_max = OHCI_MAX_DEVICES;
if (usb_bus_mem_alloc_all(&sc->sc_bus, USB_GET_DMA_TAG(dev),
&ohci_iterate_hw_softc))
return (ENOMEM);
rid = 0;
sc->sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
if (!sc->sc_io_res) {
device_printf(dev, "cannot map OHCI register space\n");
goto fail;
}
sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
sc->sc_io_size = rman_get_size(sc->sc_io_res);
rid = 0;
sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
if (sc->sc_irq_res == NULL) {
device_printf(dev, "cannot allocate interrupt\n");
goto fail;
}
sc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
if (!(sc->sc_bus.bdev))
goto fail;
device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
strlcpy(sc->sc_vendor, "NXP", sizeof(sc->sc_vendor));
err = bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
NULL, (void *)ohci_interrupt, sc, &sc->sc_intr_hdl);
if (err) {
sc->sc_intr_hdl = NULL;
goto fail;
}
usbctrl = lpc_pwr_read(dev, LPC_CLKPWR_USB_CTRL);
usbctrl |= LPC_CLKPWR_USB_CTRL_SLAVE_HCLK | LPC_CLKPWR_USB_CTRL_BUSKEEPER;
lpc_pwr_write(dev, LPC_CLKPWR_USB_CTRL, usbctrl);
/* Enable OTG I2C clock */
lpc_otg_wait_write_4(sc, LPC_OTG_CLOCK_CTRL,
LPC_OTG_CLOCK_STATUS, LPC_OTG_CLOCK_CTRL_I2C_EN);
/* Reset OTG I2C bus */
lpc_otg_i2c_reset(sc);
lpc_isp3101_configure(dev, sc);
/* Configure PLL */
usbctrl &= ~(LPC_CLKPWR_USB_CTRL_CLK_EN1 | LPC_CLKPWR_USB_CTRL_CLK_EN2);
lpc_pwr_write(dev, LPC_CLKPWR_USB_CTRL, usbctrl);
usbctrl |= LPC_CLKPWR_USB_CTRL_CLK_EN1;
lpc_pwr_write(dev, LPC_CLKPWR_USB_CTRL, usbctrl);
usbctrl |= LPC_CLKPWR_USB_CTRL_FDBKDIV(192-1);
usbctrl |= LPC_CLKPWR_USB_CTRL_POSTDIV(1);
usbctrl |= LPC_CLKPWR_USB_CTRL_PLL_PDOWN;
lpc_pwr_write(dev, LPC_CLKPWR_USB_CTRL, usbctrl);
do {
usbctrl = lpc_pwr_read(dev, LPC_CLKPWR_USB_CTRL);
if (i++ > 100000) {
device_printf(dev, "USB OTG PLL doesn't lock!\n");
goto fail;
}
} while ((usbctrl & LPC_CLKPWR_USB_CTRL_PLL_LOCK) == 0);
usbctrl |= LPC_CLKPWR_USB_CTRL_CLK_EN2;
usbctrl |= LPC_CLKPWR_USB_CTRL_HOST_NEED_CLK_EN;
lpc_pwr_write(dev, LPC_CLKPWR_USB_CTRL, usbctrl);
lpc_otg_wait_write_4(sc, LPC_OTG_CLOCK_CTRL, LPC_OTG_CLOCK_STATUS,
(LPC_OTG_CLOCK_CTRL_AHB_EN | LPC_OTG_CLOCK_CTRL_OTG_EN |
LPC_OTG_CLOCK_CTRL_I2C_EN | LPC_OTG_CLOCK_CTRL_HOST_EN));
otgstatus = lpc_otg_read_4(sc, LPC_OTG_STATUS);
lpc_otg_write_4(sc, LPC_OTG_STATUS, otgstatus |
LPC_OTG_STATUS_HOST_EN);
lpc_isp3101_write(sc, LPC_ISP3101_OTG_CONTROL_1,
LPC_ISP3101_OTG1_VBUS_DRV);
err = ohci_init(sc);
if (err)
goto fail;
err = device_probe_and_attach(sc->sc_bus.bdev);
if (err)
goto fail;
return (0);
fail:
if (sc->sc_intr_hdl)
bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_intr_hdl);
if (sc->sc_irq_res)
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res);
if (sc->sc_io_res)
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_io_res);
return (ENXIO);
}
static int
lpc_isp3101_read(struct ohci_softc *sc, int reg)
{
int status;
int i = 0;
lpc_otg_write_4(sc, LPC_OTG_I2C_TXRX,
(LPC_ISP3101_I2C_ADDR << 1) | I2C_START_BIT);
lpc_otg_write_4(sc, LPC_OTG_I2C_TXRX, reg);
lpc_otg_write_4(sc, LPC_OTG_I2C_TXRX, (LPC_ISP3101_I2C_ADDR << 1) |
I2C_START_BIT | I2C_READ);
lpc_otg_write_4(sc, LPC_OTG_I2C_TXRX, I2C_STOP_BIT | DUMMY_BYTE);
do {
status = lpc_otg_read_4(sc, LPC_OTG_I2C_STATUS);
i++;
} while ((status & LPC_OTG_I2C_STATUS_TDI) == 0 || i < 100000);
lpc_otg_write_4(sc, LPC_OTG_I2C_STATUS, LPC_OTG_I2C_STATUS_TDI);
return (lpc_otg_read_4(sc, LPC_OTG_I2C_TXRX) & 0xff);
}
static void
lpc_otg_i2c_reset(struct ohci_softc *sc)
{
int ctrl;
int i = 0;
lpc_otg_write_4(sc, LPC_OTG_I2C_CLKHI, 0x3f);
lpc_otg_write_4(sc, LPC_OTG_I2C_CLKLO, 0x3f);
ctrl = lpc_otg_read_4(sc, LPC_OTG_I2C_CTRL);
lpc_otg_write_4(sc, LPC_OTG_I2C_CTRL, ctrl | LPC_OTG_I2C_CTRL_SRST);
do {
ctrl = lpc_otg_read_4(sc, LPC_OTG_I2C_CTRL);
i++;
} while (ctrl & LPC_OTG_I2C_CTRL_SRST);
}
static void
lpc_isp3101_write(struct ohci_softc *sc, int reg, int value)
{
int status;
int i = 0;
bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, LPC_OTG_I2C_TXRX,
(LPC_ISP3101_I2C_ADDR << 1) | I2C_START_BIT);
bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, LPC_OTG_I2C_TXRX,
(reg | I2C_WRITE));
bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, LPC_OTG_I2C_TXRX,
(value | I2C_STOP_BIT));
do {
status = bus_space_read_4(sc->sc_io_tag, sc->sc_io_hdl,
LPC_OTG_I2C_STATUS);
i++;
} while ((status & LPC_OTG_I2C_STATUS_TDI) == 0 || i < 100000);
bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, LPC_OTG_I2C_STATUS,
LPC_OTG_I2C_STATUS_TDI);
}
static __inline void
lpc_isp3101_clear(struct ohci_softc *sc, int reg, int value)
{
lpc_isp3101_write(sc, (reg | LPC_ISP3101_REG_CLEAR_ADDR), value);
}
static void
lpc_isp3101_configure(device_t dev, struct ohci_softc *sc)
{
lpc_isp3101_clear(sc, LPC_ISP3101_MODE_CONTROL_1, LPC_ISP3101_MC1_UART_EN);
lpc_isp3101_clear(sc, LPC_ISP3101_MODE_CONTROL_1, ~LPC_ISP3101_MC1_SPEED_REG);
lpc_isp3101_write(sc, LPC_ISP3101_MODE_CONTROL_1, LPC_ISP3101_MC1_SPEED_REG);
lpc_isp3101_clear(sc, LPC_ISP3101_MODE_CONTROL_2, ~0);
lpc_isp3101_write(sc, LPC_ISP3101_MODE_CONTROL_2,
(LPC_ISP3101_MC2_BI_DI | LPC_ISP3101_MC2_PSW_EN
| LPC_ISP3101_MC2_SPD_SUSP_CTRL));
lpc_isp3101_clear(sc, LPC_ISP3101_OTG_CONTROL_1, ~0);
lpc_isp3101_write(sc, LPC_ISP3101_MODE_CONTROL_1, LPC_ISP3101_MC1_DAT_SE0);
lpc_isp3101_write(sc, LPC_ISP3101_OTG_CONTROL_1,
(LPC_ISP3101_OTG1_DM_PULLDOWN | LPC_ISP3101_OTG1_DP_PULLDOWN));
lpc_isp3101_clear(sc, LPC_ISP3101_OTG_CONTROL_1,
(LPC_ISP3101_OTG1_DM_PULLUP | LPC_ISP3101_OTG1_DP_PULLUP));
lpc_isp3101_clear(sc, LPC_ISP3101_OTG_INTR_LATCH, ~0);
lpc_isp3101_clear(sc, LPC_ISP3101_OTG_INTR_FALLING, ~0);
lpc_isp3101_clear(sc, LPC_ISP3101_OTG_INTR_RISING, ~0);
device_printf(dev,
"ISP3101 PHY <vendor:0x%04x, product:0x%04x, version:0x%04x>\n",
(lpc_isp3101_read(sc, 0x00) | (lpc_isp3101_read(sc, 0x01) << 8)),
(lpc_isp3101_read(sc, 0x03) | (lpc_isp3101_read(sc, 0x04) << 8)),
(lpc_isp3101_read(sc, 0x14) | (lpc_isp3101_read(sc, 0x15) << 8)));
}
static int
lpc_ohci_detach(device_t dev)
{
return (0);
}
static device_method_t lpc_ohci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, lpc_ohci_probe),
DEVMETHOD(device_attach, lpc_ohci_attach),
DEVMETHOD(device_detach, lpc_ohci_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
/* Bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
{ 0, 0 }
};
static driver_t lpc_ohci_driver = {
"ohci",
lpc_ohci_methods,
sizeof(struct ohci_softc),
};
static devclass_t lpc_ohci_devclass;
DRIVER_MODULE(ohci, simplebus, lpc_ohci_driver, lpc_ohci_devclass, 0, 0);
MODULE_DEPEND(ohci, usb, 1, 1, 1);
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