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>,
Hui Wang <hui.wang@canonical.com>,
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
Sanyog Kale <sanyog.r.kale@intel.com>
Subject: [PATCH 6/8] soundwire: intel: add helpers for link power down and shim wake
Date: Thu, 27 Feb 2020 16:32:04 -0600 [thread overview]
Message-ID: <20200227223206.5020-7-pierre-louis.bossart@linux.intel.com> (raw)
In-Reply-To: <20200227223206.5020-1-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 d5533564195a..eafa2016c76d 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
next prev parent reply other threads:[~2020-02-27 22:32 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-27 22:31 [PATCH 0/8] soundwire: remove platform devices, add SOF interfaces Pierre-Louis Bossart
2020-02-27 22:31 ` [PATCH 1/8] soundwire: bus_type: add master_device/driver support Pierre-Louis Bossart
2020-02-28 7:32 ` Greg KH
2020-02-28 15:53 ` Pierre-Louis Bossart
2020-03-03 5:41 ` Vinod Koul
2020-03-03 15:23 ` Pierre-Louis Bossart
2020-03-04 9:53 ` Vinod Koul
2020-03-04 15:17 ` Pierre-Louis Bossart
2020-03-04 16:28 ` Greg KH
2020-03-05 6:46 ` Vinod Koul
2020-03-05 6:36 ` Vinod Koul
2020-03-05 12:46 ` Pierre-Louis Bossart
2020-03-06 5:01 ` Vinod Koul
2020-03-06 15:40 ` Pierre-Louis Bossart
2020-03-11 6:36 ` Vinod Koul
2020-03-11 14:44 ` Pierre-Louis Bossart
2020-03-13 11:50 ` Vinod Koul
2020-03-13 16:54 ` Pierre-Louis Bossart
2020-03-14 9:49 ` Vinod Koul
2020-03-16 19:15 ` Pierre-Louis Bossart
2020-03-20 15:33 ` Vinod Koul
2020-03-20 16:36 ` Pierre-Louis Bossart
2020-03-23 12:16 ` Vinod Koul
2020-02-27 22:32 ` [PATCH 2/8] soundwire: intel: transition to sdw_master_device/driver support Pierre-Louis Bossart
2020-02-28 7:34 ` Greg KH
2020-02-28 16:01 ` Pierre-Louis Bossart
2020-03-03 6:05 ` Vinod Koul
2020-02-27 22:32 ` [PATCH 3/8] soundwire: intel_init: add implementation of sdw_intel_enable_irq() Pierre-Louis Bossart
2020-02-27 22:32 ` [PATCH 4/8] soundwire: intel_init: use EXPORT_SYMBOL_NS Pierre-Louis Bossart
2020-02-27 22:32 ` [PATCH 5/8] soundwire: intel/cadence: merge Soundwire interrupt handlers/threads Pierre-Louis Bossart
2020-02-27 22:32 ` Pierre-Louis Bossart [this message]
2020-02-27 22:32 ` [PATCH 7/8] soundwire: intel: add wake interrupt support Pierre-Louis Bossart
2020-02-27 22:32 ` [PATCH 8/8] soundwire: intel_init: save Slave(s) _ADR info in sdw_intel_ctx Pierre-Louis Bossart
2020-02-28 7:32 ` [PATCH 0/8] soundwire: remove platform devices, add SOF interfaces Greg KH
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