linux-kernel - [PATCH 6/6] soundwire: intel: introduce shim and alh base

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Date:   Wed, 14 Jul 2021 10:46:14 +0800
From:   Bard Liao <yung-chuan.liao@...ux.intel.com>
To:     alsa-devel@...a-project.org, vkoul@...nel.org
Cc:     vinod.koul@...aro.org, linux-kernel@...r.kernel.org, tiwai@...e.de,
        broonie@...nel.org, gregkh@...uxfoundation.org,
        srinivas.kandagatla@...aro.org,
        pierre-louis.bossart@...ux.intel.com, sanyog.r.kale@...el.com,
        bard.liao@...el.com
Subject: [PATCH 6/6] soundwire: intel: introduce shim and alh base

shim base and alh base are platform-dependent. Adding these two
parameters allows us to use different shim/alh base for each
platform.

Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>
---
 drivers/soundwire/intel_init.c      | 8 +++++---
 include/linux/soundwire/sdw_intel.h | 8 ++++++++
 sound/soc/sof/intel/hda.c           | 2 ++
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index 03ff69ab1797..e329022e1669 100644
--- a/drivers/soundwire/intel_init.c
+++ b/drivers/soundwire/intel_init.c
@@ -63,8 +63,8 @@ static struct sdw_intel_link_dev *intel_link_dev_register(struct sdw_intel_res *
 	link->mmio_base = res->mmio_base;
 	link->registers = res->mmio_base + SDW_LINK_BASE
 		+ (SDW_LINK_SIZE * link_id);
-	link->shim = res->mmio_base + SDW_SHIM_BASE;
-	link->alh = res->mmio_base + SDW_ALH_BASE;
+	link->shim = res->mmio_base + res->shim_base;
+	link->alh = res->mmio_base + res->alh_base;
 
 	link->ops = res->ops;
 	link->dev = res->dev;
@@ -214,6 +214,8 @@ static struct sdw_intel_ctx
 	}
 
 	ctx->mmio_base = res->mmio_base;
+	ctx->shim_base = res->shim_base;
+	ctx->alh_base = res->alh_base;
 	ctx->link_mask = res->link_mask;
 	ctx->handle = res->handle;
 	mutex_init(&ctx->shim_lock);
@@ -302,7 +304,7 @@ sdw_intel_startup_controller(struct sdw_intel_ctx *ctx)
 		return -EINVAL;
 
 	/* Check SNDWLCAP.LCOUNT */
-	caps = ioread32(ctx->mmio_base + SDW_SHIM_BASE + SDW_SHIM_LCAP);
+	caps = ioread32(ctx->mmio_base + ctx->shim_base + SDW_SHIM_LCAP);
 	caps &= GENMASK(2, 0);
 
 	/* Check HW supported vs property value */
diff --git a/include/linux/soundwire/sdw_intel.h b/include/linux/soundwire/sdw_intel.h
index 7fce6aee0c36..8a463b8fc12a 100644
--- a/include/linux/soundwire/sdw_intel.h
+++ b/include/linux/soundwire/sdw_intel.h
@@ -195,6 +195,8 @@ struct sdw_intel_slave_id {
  * @link_list: list to handle interrupts across all links
  * @shim_lock: mutex to handle concurrent rmw access to shared SHIM registers.
  * @shim_mask: flags to track initialization of SHIM shared registers
+ * @shim_base: sdw shim base.
+ * @alh_base: sdw alh base.
  */
 struct sdw_intel_ctx {
 	int count;
@@ -207,6 +209,8 @@ struct sdw_intel_ctx {
 	struct list_head link_list;
 	struct mutex shim_lock; /* lock for access to shared SHIM registers */
 	u32 shim_mask;
+	u32 shim_base;
+	u32 alh_base;
 };
 
 /**
@@ -225,6 +229,8 @@ struct sdw_intel_ctx {
  * machine-specific quirks are handled in the DSP driver.
  * @clock_stop_quirks: mask array of possible behaviors requested by the
  * DSP driver. The quirks are common for all links for now.
+ * @shim_base: sdw shim base.
+ * @alh_base: sdw alh base.
  */
 struct sdw_intel_res {
 	int count;
@@ -236,6 +242,8 @@ struct sdw_intel_res {
 	struct device *dev;
 	u32 link_mask;
 	u32 clock_stop_quirks;
+	u32 shim_base;
+	u32 alh_base;
 };
 
 /*
diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c
index c979581c6812..b4e35fbbe693 100644
--- a/sound/soc/sof/intel/hda.c
+++ b/sound/soc/sof/intel/hda.c
@@ -166,6 +166,8 @@ static int hda_sdw_probe(struct snd_sof_dev *sdev)
 	memset(&res, 0, sizeof(res));
 
 	res.mmio_base = sdev->bar[HDA_DSP_BAR];
+	res.shim_base = hdev->desc->sdw_shim_base;
+	res.alh_base = hdev->desc->sdw_alh_base;
 	res.irq = sdev->ipc_irq;
 	res.handle = hdev->info.handle;
 	res.parent = sdev->dev;
-- 
2.17.1