/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/usb/msm_hsusb_hw.h>
#include <linux/usb/ulpi.h>
#include <linux/usb/gadget.h>
#include <linux/usb/chipidea.h>

#include "ci.h"

#define MSM_USB_BASE	(ci->hw_bank.abs)

static void ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event)
{
	struct device *dev = ci->gadget.dev.parent;

	switch (event) {
	case CI_HDRC_CONTROLLER_RESET_EVENT:
		dev_dbg(dev, "CI_HDRC_CONTROLLER_RESET_EVENT received\n");
		writel(0, USB_AHBBURST);
		/* use AHB transactor, allow posted data writes */
		writel(0x8, USB_AHBMODE);
		usb_phy_init(ci->usb_phy);
		break;
	case CI_HDRC_CONTROLLER_STOPPED_EVENT:
		dev_dbg(dev, "CI_HDRC_CONTROLLER_STOPPED_EVENT received\n");
		/*
		 * Put the phy in non-driving mode. Otherwise host
		 * may not detect soft-disconnection.
		 */
		usb_phy_notify_disconnect(ci->usb_phy, USB_SPEED_UNKNOWN);
		break;
	default:
		dev_dbg(dev, "unknown ci_hdrc event\n");
		break;
	}
}

static struct ci_hdrc_platform_data ci_hdrc_msm_platdata = {
	.name			= "ci_hdrc_msm",
	.capoffset		= DEF_CAPOFFSET,
	.flags			= CI_HDRC_REGS_SHARED |
				  CI_HDRC_DISABLE_STREAMING,

	.notify_event		= ci_hdrc_msm_notify_event,
};

static int ci_hdrc_msm_probe(struct platform_device *pdev)
{
	struct platform_device *plat_ci;
	struct usb_phy *phy;

	dev_dbg(&pdev->dev, "ci_hdrc_msm_probe\n");

	/*
	 * OTG(PHY) driver takes care of PHY initialization, clock management,
	 * powering up VBUS, mapping of registers address space and power
	 * management.
	 */
	phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
	if (IS_ERR(phy))
		return PTR_ERR(phy);

	ci_hdrc_msm_platdata.usb_phy = phy;

	plat_ci = ci_hdrc_add_device(&pdev->dev,
				pdev->resource, pdev->num_resources,
				&ci_hdrc_msm_platdata);
	if (IS_ERR(plat_ci)) {
		dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
		return PTR_ERR(plat_ci);
	}

	platform_set_drvdata(pdev, plat_ci);

	pm_runtime_no_callbacks(&pdev->dev);
	pm_runtime_enable(&pdev->dev);

	return 0;
}

static int ci_hdrc_msm_remove(struct platform_device *pdev)
{
	struct platform_device *plat_ci = platform_get_drvdata(pdev);

	pm_runtime_disable(&pdev->dev);
	ci_hdrc_remove_device(plat_ci);

	return 0;
}

static const struct of_device_id msm_ci_dt_match[] = {
	{ .compatible = "qcom,ci-hdrc", },
	{ }
};
MODULE_DEVICE_TABLE(of, msm_ci_dt_match);

static struct platform_driver ci_hdrc_msm_driver = {
	.probe = ci_hdrc_msm_probe,
	.remove = ci_hdrc_msm_remove,
	.driver = {
		.name = "msm_hsusb",
		.of_match_table = msm_ci_dt_match,
	},
};

module_platform_driver(ci_hdrc_msm_driver);

MODULE_ALIAS("platform:msm_hsusb");
MODULE_ALIAS("platform:ci13xxx_msm");
MODULE_LICENSE("GPL v2");
a href='/cgit.cgi/linux/net-next.git/commit/include/scsi/scsi_host.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>scsi_host.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='6e978b22efa1db9f6e71b24440b5f1d93e968ee3'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td 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>Srinivas Pandruvada &lt;srinivas.pandruvada@linux.intel.com&gt;</td><td class='right'>2017-02-03 14:18:39 -0800</td></tr>
<tr><th>committer</th><td>Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;</td><td class='right'>2017-02-04 00:11:08 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/scsi/scsi_host.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>6e978b22efa1db9f6e71b24440b5f1d93e968ee3</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/scsi/scsi_host.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>c666f7a26b860674848949e39a610222b0723f89</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/scsi/scsi_host.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>include/scsi/scsi_host.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/scsi/scsi_host.h?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>3c223c19aea85d3dda1416c187915f4a30b04b1f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/scsi/scsi_host.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3&amp;id2=3c223c19aea85d3dda1416c187915f4a30b04b1f'>diff</a>)</td></tr></table>
<div class='commit-subject'>cpufreq: intel_pstate: Disable energy efficiency optimization</div><div class='commit-msg'>Some Kabylake desktop processors may not reach max turbo when running in
HWP mode, even if running under sustained 100% utilization.

This occurs when the HWP.EPP (Energy Performance Preference) is set to
"balance_power" (0x80) -- the default on most systems.

It occurs because the platform BIOS may erroneously enable an
energy-efficiency setting -- MSR_IA32_POWER_CTL BIT-EE, which is not
recommended to be enabled on this SKU.

On the failing systems, this BIOS issue was not discovered when the
desktop motherboard was tested with Windows, because the BIOS also
neglects to provide the ACPI/CPPC table, that Windows requires to enable
HWP, and so Windows runs in legacy P-state mode, where this setting has
no effect.

Linux' intel_pstate driver does not require ACPI/CPPC to enable HWP, and
so it runs in HWP mode, exposing this incorrect BIOS configuration.

There are several ways to address this problem.

First, Linux can also run in legacy P-state mode on this system.
As intel_pstate is how Linux enables HWP, booting with
"intel_pstate=disable"
will run in acpi-cpufreq/ondemand legacy p-state mode.

Or second, the "performance" governor can be used with intel_pstate,
which will modify HWP.EPP to 0.

Or third, starting in 4.10, the
/sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference
attribute in can be updated from "balance_power" to "performance".

Or fourth, apply this patch, which fixes the erroneous setting of
MSR_IA32_POWER_CTL BIT_EE on this model, allowing the default
configuration to function as designed.

Signed-off-by: Srinivas Pandruvada &lt;srinivas.pandruvada@linux.intel.com&gt;
Reviewed-by: Len Brown &lt;len.brown@intel.com&gt;
Cc: 4.6+ &lt;stable@vger.kernel.org&gt; # 4.6+
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>Diffstat</a> (limited to 'include/scsi/scsi_host.h')</div><table summary='diffstat' class='diffstat'>