dwusb.c File Reference

Synopsys DesignWare USB3 host controller driver. More...

#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ipxe/timer.h>
#include <ipxe/devtree.h>
#include <ipxe/fdt.h>
#include "dwusb.h"

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
static int	dwusb_probe (struct dt_device *dt, unsigned int offset)
	Probe devicetree device. More...
static void	dwusb_remove (struct dt_device *dt)
	Remove devicetree device. More...

Variables
static const char *	dwusb_ids []
	DesignWare USB3 compatible model identifiers. More...
struct dt_driver dwusb_driver	__dt_driver
	DesignWare USB3 devicetree driver. More...

Detailed Description

Synopsys DesignWare USB3 host controller driver.

Definition in file dwusb.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

dwusb_probe()

static int dwusb_probe ( struct dt_device *  dt, unsigned int  offset  )

static

Probe devicetree device.

Parameters

dt	Devicetree device
offset	Starting node offset

Return values

rc	Return status code

Definition at line 47 of file dwusb.c.

                                                                     {
        struct xhci_device *xhci;
        uint32_t gctl;
        int rc;

        /* Allocate and initialise structure */
        xhci = zalloc ( sizeof ( *xhci ) );
        if ( ! xhci ) {
                rc = -ENOMEM;
                goto err_alloc;
        }
        xhci->dev = &dt->dev;
        xhci->dma = &dt->dma;

        /* Map registers */
        xhci->regs = dt_ioremap ( dt, offset, 0, 0 );
        if ( ! xhci->regs ) {
                rc = -ENODEV;
                goto err_ioremap;
        }

        /* Reset via global core control register */
        gctl = readl ( xhci->regs + DWUSB_GCTL );
        writel ( ( gctl | DWUSB_GCTL_RESET ), ( xhci->regs + DWUSB_GCTL ) );
        mdelay ( 100 );
        writel ( gctl, ( xhci->regs + DWUSB_GCTL ) );

        /* Configure as a host controller */
        gctl &= ~DWUSB_GCTL_PRTDIR_MASK;
        gctl |= DWUSB_GCTL_PRTDIR_HOST;
        writel ( gctl, ( xhci->regs + DWUSB_GCTL ) );

        /* Initialise xHCI device */
        xhci_init ( xhci );

        /* Register xHCI device */
        if ( ( rc = xhci_register ( xhci ) ) != 0 ) {
                DBGC ( xhci, "XHCI %s could not register: %s\n",
                       xhci->name, strerror ( rc ) );
                goto err_register;
        }

        dt_set_drvdata ( dt, xhci );
        return 0;

        xhci_unregister ( xhci );
 err_register:
        iounmap ( xhci->regs );
 err_ioremap:
        free ( xhci );
 err_alloc:
        return rc;
}

References DBGC, dt_device::dev, xhci_device::dev, dt_device::dma, xhci_device::dma, dt_ioremap(), dt_set_drvdata(), DWUSB_GCTL, DWUSB_GCTL_PRTDIR_HOST, DWUSB_GCTL_PRTDIR_MASK, DWUSB_GCTL_RESET, ENODEV, ENOMEM, free, iounmap(), mdelay(), xhci_device::name, offset, rc, readl(), xhci_device::regs, strerror(), writel(), xhci_init(), xhci_register(), xhci_unregister(), and zalloc().

dwusb_remove()

static void dwusb_remove ( struct dt_device *  dt )

static

Remove devicetree device.

Parameters

dt	Devicetree device

Definition at line 106 of file dwusb.c.

                                                  {
        struct xhci_device *xhci = dt_get_drvdata ( dt );

        /* Unregister xHCI device */
        xhci_unregister ( xhci );

        /* Unmap registers */
        iounmap ( xhci->regs );

        /* Free device */
        free ( xhci );
}

References dt_get_drvdata(), free, iounmap(), xhci_device::regs, and xhci_unregister().

Variable Documentation

dwusb_ids

const char* dwusb_ids[]

static

Initial value:

= {
        "snps,dwc3",
}

DesignWare USB3 compatible model identifiers.

Definition at line 120 of file dwusb.c.

__dt_driver

struct dt_driver dwusb_driver __dt_driver

Initial value:

= {
        .name = "dwusb",
        .ids = dwusb_ids,
        .id_count = ( sizeof ( dwusb_ids ) / sizeof ( dwusb_ids[0] ) ),
        .probe = dwusb_probe,
        .remove = dwusb_remove,
}

DesignWare USB3 devicetree driver.

Definition at line 125 of file dwusb.c.