/**
 * ulpi.c - DesignWare USB3 Controller's ULPI PHY interface
 *
 * Copyright (C) 2015 Intel Corporation
 *
 * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/ulpi/regs.h>

#include "core.h"
#include "io.h"

#define DWC3_ULPI_ADDR(a) \
		((a >= ULPI_EXT_VENDOR_SPECIFIC) ? \
		DWC3_GUSB2PHYACC_ADDR(ULPI_ACCESS_EXTENDED) | \
		DWC3_GUSB2PHYACC_EXTEND_ADDR(a) : DWC3_GUSB2PHYACC_ADDR(a))

static int dwc3_ulpi_busyloop(struct dwc3 *dwc)
{
	unsigned count = 1000;
	u32 reg;

	while (count--) {
		reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYACC(0));
		if (!(reg & DWC3_GUSB2PHYACC_BUSY))
			return 0;
		cpu_relax();
	}

	return -ETIMEDOUT;
}

static int dwc3_ulpi_read(struct device *dev, u8 addr)
{
	struct dwc3 *dwc = dev_get_drvdata(dev);
	u32 reg;
	int ret;

	reg = DWC3_GUSB2PHYACC_NEWREGREQ | DWC3_ULPI_ADDR(addr);
	dwc3_writel(dwc->regs, DWC3_GUSB2PHYACC(0), reg);

	ret = dwc3_ulpi_busyloop(dwc);
	if (ret)
		return ret;

	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYACC(0));

	return DWC3_GUSB2PHYACC_DATA(reg);
}

static int dwc3_ulpi_write(struct device *dev, u8 addr, u8 val)
{
	struct dwc3 *dwc = dev_get_drvdata(dev);
	u32 reg;

	reg = DWC3_GUSB2PHYACC_NEWREGREQ | DWC3_ULPI_ADDR(addr);
	reg |= DWC3_GUSB2PHYACC_WRITE | val;
	dwc3_writel(dwc->regs, DWC3_GUSB2PHYACC(0), reg);

	return dwc3_ulpi_busyloop(dwc);
}

static const struct ulpi_ops dwc3_ulpi_ops = {
	.read = dwc3_ulpi_read,
	.write = dwc3_ulpi_write,
};

int dwc3_ulpi_init(struct dwc3 *dwc)
{
	/* Register the interface */
	dwc->ulpi = ulpi_register_interface(dwc->dev, &dwc3_ulpi_ops);
	if (IS_ERR(dwc->ulpi)) {
		dev_err(dwc->dev, "failed to register ULPI interface");
		return PTR_ERR(dwc->ulpi);
	}

	return 0;
}

void dwc3_ulpi_exit(struct dwc3 *dwc)
{
	if (dwc->ulpi) {
		ulpi_unregister_interface(dwc->ulpi);
		dwc->ulpi = NULL;
	}
}
</a><a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/gadget/udc/bdc/bdc_ep.c?id=a9306a63631493afc75893a4ac405d4e1cbae6aa'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/drivers/usb/gadget/udc/bdc/bdc_ep.c'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?id=a9306a63631493afc75893a4ac405d4e1cbae6aa'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers?id=a9306a63631493afc75893a4ac405d4e1cbae6aa'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb?id=a9306a63631493afc75893a4ac405d4e1cbae6aa'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/gadget?id=a9306a63631493afc75893a4ac405d4e1cbae6aa'>gadget</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/gadget/udc?id=a9306a63631493afc75893a4ac405d4e1cbae6aa'>udc</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/gadget/udc/bdc?id=a9306a63631493afc75893a4ac405d4e1cbae6aa'>bdc</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/gadget/udc/bdc/bdc_ep.c?id=a9306a63631493afc75893a4ac405d4e1cbae6aa'>bdc_ep.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/gadget/udc/bdc/bdc_ep.c?id=a9306a63631493afc75893a4ac405d4e1cbae6aa&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
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<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-06 14:37:55 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-06 14:37:55 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/ir-usb.c?id=72df5eba704252e54b5b19395cb938f8bb55cab8'>72df5eba704252e54b5b19395cb938f8bb55cab8</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/serial/ir-usb.c?id=72df5eba704252e54b5b19395cb938f8bb55cab8'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=72df5eba704252e54b5b19395cb938f8bb55cab8'>9b9dd6aa0cd3b6cda738de32dd05075e6e66bab1</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/serial/ir-usb.c?id=72df5eba704252e54b5b19395cb938f8bb55cab8'>drivers/usb/serial/ir-usb.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/ir-usb.c?id=396bf4cd835e62d70fad4a03a8963e61f19021f2'>396bf4cd835e62d70fad4a03a8963e61f19021f2</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/serial/ir-usb.c?id=72df5eba704252e54b5b19395cb938f8bb55cab8&amp;id2=396bf4cd835e62d70fad4a03a8963e61f19021f2'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/ir-usb.c?id=f9f96fc10c09ca16e336854c08bc1563eed97985'>f9f96fc10c09ca16e336854c08bc1563eed97985</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/serial/ir-usb.c?id=72df5eba704252e54b5b19395cb938f8bb55cab8&amp;id2=f9f96fc10c09ca16e336854c08bc1563eed97985'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'media/v4.10-3' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media</div><div class='commit-msg'>Pull media fixes from Mauro Carvalho Chehab:
 "A few documentation fixes at CEC (with got promoted from staging for
  4.10), and one fix on its core."

* tag 'media/v4.10-3' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  [media] cec: fix wrong last_la determination
  [media] cec-intro.rst: mention the v4l-utils package and CEC utilities
  [media] cec rst: remove "This API is not yet finalized" notice
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=72df5eba704252e54b5b19395cb938f8bb55cab8'>Diffstat</a> (limited to 'drivers/usb/serial/ir-usb.c')</div><table summary='diffstat' class='diffstat'>