#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/usb/otg.h>
#include <linux/usb/usb_phy_generic.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/usb/of.h>

#include "phy-am335x-control.h"
#include "phy-generic.h"

struct am335x_phy {
	struct usb_phy_generic usb_phy_gen;
	struct phy_control *phy_ctrl;
	int id;
	enum usb_dr_mode dr_mode;
};

static int am335x_init(struct usb_phy *phy)
{
	struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);

	phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, true);
	return 0;
}

static void am335x_shutdown(struct usb_phy *phy)
{
	struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);

	phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false);
}

static int am335x_phy_probe(struct platform_device *pdev)
{
	struct am335x_phy *am_phy;
	struct device *dev = &pdev->dev;
	int ret;

	am_phy = devm_kzalloc(dev, sizeof(*am_phy), GFP_KERNEL);
	if (!am_phy)
		return -ENOMEM;

	am_phy->phy_ctrl = am335x_get_phy_control(dev);
	if (!am_phy->phy_ctrl)
		return -EPROBE_DEFER;

	am_phy->id = of_alias_get_id(pdev->dev.of_node, "phy");
	if (am_phy->id < 0) {
		dev_err(&pdev->dev, "Missing PHY id: %d\n", am_phy->id);
		return am_phy->id;
	}

	am_phy->dr_mode = of_usb_get_dr_mode_by_phy(pdev->dev.of_node, -1);

	ret = usb_phy_gen_create_phy(dev, &am_phy->usb_phy_gen, NULL);
	if (ret)
		return ret;

	ret = usb_add_phy_dev(&am_phy->usb_phy_gen.phy);
	if (ret)
		return ret;
	am_phy->usb_phy_gen.phy.init = am335x_init;
	am_phy->usb_phy_gen.phy.shutdown = am335x_shutdown;

	platform_set_drvdata(pdev, am_phy);
	device_init_wakeup(dev, true);

	/*
	 * If we leave PHY wakeup enabled then AM33XX wakes up
	 * immediately from DS0. To avoid this we mark dev->power.can_wakeup
	 * to false. The same is checked in suspend routine to decide
	 * on whether to enable PHY wakeup or not.
	 * PHY wakeup works fine in standby mode, there by allowing us to
	 * handle remote wakeup, wakeup on disconnect and connect.
	 */

	device_set_wakeup_enable(dev, false);
	phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false);

	return 0;
}

static int am335x_phy_remove(struct platform_device *pdev)
{
	struct am335x_phy *am_phy = platform_get_drvdata(pdev);

	usb_remove_phy(&am_phy->usb_phy_gen.phy);
	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int am335x_phy_suspend(struct device *dev)
{
	struct platform_device	*pdev = to_platform_device(dev);
	struct am335x_phy *am_phy = platform_get_drvdata(pdev);

	/*
	 * Enable phy wakeup only if dev->power.can_wakeup is true.
	 * Make sure to enable wakeup to support remote wakeup	in
	 * standby mode ( same is not supported in OFF(DS0) mode).
	 * Enable it by doing
	 * echo enabled > /sys/bus/platform/devices/<usb-phy-id>/power/wakeup
	 */

	if (device_may_wakeup(dev))
		phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, true);

	phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false);

	return 0;
}

static int am335x_phy_resume(struct device *dev)
{
	struct platform_device	*pdev = to_platform_device(dev);
	struct am335x_phy	*am_phy = platform_get_drvdata(pdev);

	phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, true);

	if (device_may_wakeup(dev))
		phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, false);

	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(am335x_pm_ops, am335x_phy_suspend, am335x_phy_resume);

static const struct of_device_id am335x_phy_ids[] = {
	{ .compatible = "ti,am335x-usb-phy" },
	{ }
};
MODULE_DEVICE_TABLE(of, am335x_phy_ids);

static struct platform_driver am335x_phy_driver = {
	.probe          = am335x_phy_probe,
	.remove         = am335x_phy_remove,
	.driver         = {
		.name   = "am335x-phy-driver",
		.pm = &am335x_pm_ops,
		.of_match_table = am335x_phy_ids,
	},
};

module_platform_driver(am335x_phy_driver);
MODULE_LICENSE("GPL v2");
d class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Benjamin Herrenschmidt &lt;benh@kernel.crashing.org&gt;</td><td class='right'>2017-02-03 17:10:28 +1100</td></tr>
<tr><th>committer</th><td>Michael Ellerman &lt;mpe@ellerman.id.au&gt;</td><td class='right'>2017-02-08 23:36:29 +1100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/llc_c_ev.h?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>d7df2443cd5f67fc6ee7c05a88e4996e8177f91b</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/net/llc_c_ev.h?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>098a7c0ca4fceb8a65cb1f693c9d71990388933d</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/net/llc_c_ev.h?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>include/net/llc_c_ev.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/llc_c_ev.h?id=a0615a16f7d0ceb5804d295203c302d496d8ee91'>a0615a16f7d0ceb5804d295203c302d496d8ee91</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/net/llc_c_ev.h?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b&amp;id2=a0615a16f7d0ceb5804d295203c302d496d8ee91'>diff</a>)</td></tr></table>
<div class='commit-subject'>powerpc/mm: Fix spurrious segfaults on radix with autonuma</div><div class='commit-msg'>When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it
clears all the protection bits but leave the PTE valid.

With the Radix MMU, an attempt at executing from such a PTE will
take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G".

It is thus incorrect to treat all such faults as errors. We should
pass them to handle_mm_fault() for autonuma to deal with. The case
of pages that are really not executable is handled by the existing
test for VM_EXEC further down.

That leaves us with catching the kernel attempts at executing user
pages. We can catch that earlier, even before we do find_vma.

It is never valid on powerpc for the kernel to take an exec fault
to begin with. So fold that test with the existing test for the
kernel faulting on kernel addresses to bail out early.

Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report")
Signed-off-by: Benjamin Herrenschmidt &lt;benh@kernel.crashing.org&gt;
Reviewed-by: Aneesh Kumar K.V &lt;aneesh.kumar@linux.vnet.ibm.com&gt;
Acked-by: Balbir Singh &lt;bsingharora@gmail.com&gt;
Signed-off-by: Michael Ellerman &lt;mpe@ellerman.id.au&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>Diffstat</a> (limited to 'include/net/llc_c_ev.h')</div><table summary='diffstat' class='diffstat'>