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freebsd-skq/sys/arm/lpc/lpc_ohci.c
gonzo 50e55c591e Merging of projects/armv6, part 8 
r235162:

  Initial LPC32x0 support. Includes DTS file for Embedded Artists EA3250
  board.

  Peripherals currently supported:
  - Serial ports
  - Interrupt controller
  - Timers
  - Ethernet
  - USB host
  - Framebuffer (in conjunction with SSD1289 LCD controller)
  - RTC
  - SPI
  - GPIO

Submitted by:	Jakub Wojciech Klama <jceel@freebsd.org>
2012-08-15 05:37:10 +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_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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