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From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: alsa-devel@alsa-project.org
Cc: linux-kernel@vger.kernel.org, tiwai@suse.de, broonie@kernel.org,
	vkoul@kernel.org, gregkh@linuxfoundation.org, jank@cadence.com,
	srinivas.kandagatla@linaro.org, slawomir.blauciak@intel.com,
	Bard liao <yung-chuan.liao@linux.intel.com>,
	Rander Wang <rander.wang@linux.intel.com>,
	Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
	Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	Sanyog Kale <sanyog.r.kale@intel.com>
Subject: [PATCH v2 05/19] soundwire: intel: add helpers for link power down and shim wake
Date: Wed,  6 Nov 2019 13:22:09 -0600	[thread overview]
Message-ID: <20191106192223.6003-6-pierre-louis.bossart@linux.intel.com> (raw)
In-Reply-To: <20191106192223.6003-1-pierre-louis.bossart@linux.intel.com>

These routines are required for power management

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
 drivers/soundwire/intel.c | 53 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index c918a26d0772..fe3a8b3b2c04 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -362,6 +362,59 @@ static int intel_shim_init(struct sdw_intel *sdw)
 	return ret;
 }
 
+static void intel_shim_wake(struct sdw_intel *sdw, bool wake_enable)
+{
+	void __iomem *shim = sdw->link_res->shim;
+	unsigned int link_id = sdw->instance;
+	u16 wake_en, wake_sts;
+
+	if (wake_enable) {
+		/* Enable the wakeup */
+		intel_writew(shim, SDW_SHIM_WAKEEN,
+			     (SDW_SHIM_WAKEEN_ENABLE << link_id));
+	} else {
+		/* Disable the wake up interrupt */
+		wake_en = intel_readw(shim, SDW_SHIM_WAKEEN);
+		wake_en &= ~(SDW_SHIM_WAKEEN_ENABLE << link_id);
+		intel_writew(shim, SDW_SHIM_WAKEEN, wake_en);
+
+		/* Clear wake status */
+		wake_sts = intel_readw(shim, SDW_SHIM_WAKESTS);
+		wake_sts |= (SDW_SHIM_WAKEEN_ENABLE << link_id);
+		intel_writew(shim, SDW_SHIM_WAKESTS_STATUS, wake_sts);
+	}
+}
+
+static int intel_link_power_down(struct sdw_intel *sdw)
+{
+	int link_control, spa_mask, cpa_mask, ret;
+	unsigned int link_id = sdw->instance;
+	void __iomem *shim = sdw->link_res->shim;
+	u16 ioctl;
+
+	/* Glue logic */
+	ioctl = intel_readw(shim, SDW_SHIM_IOCTL(link_id));
+	ioctl |= SDW_SHIM_IOCTL_BKE;
+	ioctl |= SDW_SHIM_IOCTL_COE;
+	intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+
+	ioctl &= ~(SDW_SHIM_IOCTL_MIF);
+	intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+
+	/* Link power down sequence */
+	link_control = intel_readl(shim, SDW_SHIM_LCTL);
+	spa_mask = ~(SDW_SHIM_LCTL_SPA << link_id);
+	cpa_mask = (SDW_SHIM_LCTL_CPA << link_id);
+	link_control &=  spa_mask;
+
+	ret = intel_clear_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask);
+	if (ret < 0)
+		return ret;
+
+	sdw->cdns.link_up = false;
+	return 0;
+}
+
 /*
  * PDI routines
  */
-- 
2.20.1


WARNING: multiple messages have this Message-ID
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: alsa-devel@alsa-project.org
Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	tiwai@suse.de, gregkh@linuxfoundation.org,
	linux-kernel@vger.kernel.org,
	Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
	vkoul@kernel.org, broonie@kernel.org,
	srinivas.kandagatla@linaro.org, jank@cadence.com,
	slawomir.blauciak@intel.com,
	Sanyog Kale <sanyog.r.kale@intel.com>,
	Bard liao <yung-chuan.liao@linux.intel.com>,
	Rander Wang <rander.wang@linux.intel.com>
Subject: [alsa-devel] [PATCH v2 05/19] soundwire: intel: add helpers for link power down and shim wake
Date: Wed,  6 Nov 2019 13:22:09 -0600	[thread overview]
Message-ID: <20191106192223.6003-6-pierre-louis.bossart@linux.intel.com> (raw)
In-Reply-To: <20191106192223.6003-1-pierre-louis.bossart@linux.intel.com>

These routines are required for power management

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
 drivers/soundwire/intel.c | 53 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index c918a26d0772..fe3a8b3b2c04 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -362,6 +362,59 @@ static int intel_shim_init(struct sdw_intel *sdw)
 	return ret;
 }
 
+static void intel_shim_wake(struct sdw_intel *sdw, bool wake_enable)
+{
+	void __iomem *shim = sdw->link_res->shim;
+	unsigned int link_id = sdw->instance;
+	u16 wake_en, wake_sts;
+
+	if (wake_enable) {
+		/* Enable the wakeup */
+		intel_writew(shim, SDW_SHIM_WAKEEN,
+			     (SDW_SHIM_WAKEEN_ENABLE << link_id));
+	} else {
+		/* Disable the wake up interrupt */
+		wake_en = intel_readw(shim, SDW_SHIM_WAKEEN);
+		wake_en &= ~(SDW_SHIM_WAKEEN_ENABLE << link_id);
+		intel_writew(shim, SDW_SHIM_WAKEEN, wake_en);
+
+		/* Clear wake status */
+		wake_sts = intel_readw(shim, SDW_SHIM_WAKESTS);
+		wake_sts |= (SDW_SHIM_WAKEEN_ENABLE << link_id);
+		intel_writew(shim, SDW_SHIM_WAKESTS_STATUS, wake_sts);
+	}
+}
+
+static int intel_link_power_down(struct sdw_intel *sdw)
+{
+	int link_control, spa_mask, cpa_mask, ret;
+	unsigned int link_id = sdw->instance;
+	void __iomem *shim = sdw->link_res->shim;
+	u16 ioctl;
+
+	/* Glue logic */
+	ioctl = intel_readw(shim, SDW_SHIM_IOCTL(link_id));
+	ioctl |= SDW_SHIM_IOCTL_BKE;
+	ioctl |= SDW_SHIM_IOCTL_COE;
+	intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+
+	ioctl &= ~(SDW_SHIM_IOCTL_MIF);
+	intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+
+	/* Link power down sequence */
+	link_control = intel_readl(shim, SDW_SHIM_LCTL);
+	spa_mask = ~(SDW_SHIM_LCTL_SPA << link_id);
+	cpa_mask = (SDW_SHIM_LCTL_CPA << link_id);
+	link_control &=  spa_mask;
+
+	ret = intel_clear_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask);
+	if (ret < 0)
+		return ret;
+
+	sdw->cdns.link_up = false;
+	return 0;
+}
+
 /*
  * PDI routines
  */
-- 
2.20.1

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  parent reply	other threads:[~2019-11-06 19:23 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-06 19:22 [PATCH v2 00/19] soundwire: code hardening and suspend-resume support Pierre-Louis Bossart
2019-11-06 19:22 ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 01/19] soundwire: intel/cadence: fix timeouts in MSI mode Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 02/19] soundwire: fix race between driver probe and update_status callback Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 03/19] soundwire: bus: add PM/no-PM versions of read/write functions Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 04/19] soundwire: bus: write Slave Device Number without runtime_pm Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` Pierre-Louis Bossart [this message]
2019-11-06 19:22   ` [alsa-devel] [PATCH v2 05/19] soundwire: intel: add helpers for link power down and shim wake Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 06/19] soundwire: intel: Add basic power management support Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 07/19] soundwire: intel: add pm_runtime support Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 08/19] soundwire: intel: reset pm_runtime status during system resume Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 09/19] soundwire: bus: add helper to reset Slave status to UNATTACHED Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 10/19] soundwire: intel: call helper to reset Slave states on resume Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 11/19] soundwire: bus: check first if Slaves become UNATTACHED Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 12/19] soundwire: add enumeration_complete signaling Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 13/19] soundwire: bus: add initialization_complete signaling Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 14/19] soundwire: intel: disable pm_runtime when removing a master Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 15/19] soundwire: bus: disable pm_runtime in sdw_slave_delete Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 16/19] soundwire: stream: update state machine and add state checks Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 17/19] soundwire: stream: only prepare stream when it is configured Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 18/19] soundwire: stream: do not update parameters during DISABLED-PREPARED transition Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart
2019-11-06 19:22 ` [PATCH v2 19/19] soundwire: intel: reinitialize IP+DSP in .prepare() Pierre-Louis Bossart
2019-11-06 19:22   ` [alsa-devel] " Pierre-Louis Bossart

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