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From:   Richard Fitzgerald <rf@opensource.cirrus.com>
To:     <tiwai@suse.com>, <broonie@kernel.org>, <perex@perex.cz>
CC:     <alsa-devel@alsa-project.org>, <linux-kernel@vger.kernel.org>,
        <patches@opensource.cirrus.com>,
        Richard Fitzgerald <rf@opensource.cirrus.com>
Subject: [PATCH 07/13] ASoC: cs35l56: Move part of cs35l56_init() to shared library
Date:   Thu, 25 May 2023 16:06:53 +0100
Message-ID: <20230525150659.25409-8-rf@opensource.cirrus.com>
In-Reply-To: <20230525150659.25409-1-rf@opensource.cirrus.com>
References: <20230525150659.25409-1-rf@opensource.cirrus.com>
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Part of the initialization code in cs35l56_init() can be re-used
by the HDA driver so move it into a new function in the shared
library.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
---
 include/sound/cs35l56.h           |  1 +
 sound/soc/codecs/cs35l56-shared.c | 79 +++++++++++++++++++++++++++++++
 sound/soc/codecs/cs35l56.c        | 71 +--------------------------
 3 files changed, 82 insertions(+), 69 deletions(-)

diff --git a/include/sound/cs35l56.h b/include/sound/cs35l56.h
index e97c7ccfc051..489a61f84325 100644
--- a/include/sound/cs35l56.h
+++ b/include/sound/cs35l56.h
@@ -283,6 +283,7 @@ int cs35l56_is_fw_reload_needed(struct cs35l56_base *cs35l56_base);
 int cs35l56_runtime_suspend_common(struct cs35l56_base *cs35l56_base);
 int cs35l56_runtime_resume_common(struct cs35l56_base *cs35l56_base, bool is_soundwire);
 void cs35l56_init_cs_dsp(struct cs35l56_base *cs35l56_base, struct cs_dsp *cs_dsp);
+int cs35l56_hw_init(struct cs35l56_base *cs35l56_base);
 int cs35l56_get_bclk_freq_id(unsigned int freq);
 void cs35l56_fill_supply_names(struct regulator_bulk_data *data);
 
diff --git a/sound/soc/codecs/cs35l56-shared.c b/sound/soc/codecs/cs35l56-shared.c
index 82e5edef1b3f..e3b935bd9037 100644
--- a/sound/soc/codecs/cs35l56-shared.c
+++ b/sound/soc/codecs/cs35l56-shared.c
@@ -549,6 +549,85 @@ void cs35l56_init_cs_dsp(struct cs35l56_base *cs35l56_base, struct cs_dsp *cs_ds
 }
 EXPORT_SYMBOL_NS_GPL(cs35l56_init_cs_dsp, SND_SOC_CS35L56_SHARED);
 
+int cs35l56_hw_init(struct cs35l56_base *cs35l56_base)
+{
+	int ret;
+	unsigned int devid, revid, otpid, secured;
+
+	/*
+	 * If the system is not using a reset_gpio then issue a
+	 * dummy read to force a wakeup.
+	 */
+	if (!cs35l56_base->reset_gpio)
+		regmap_read(cs35l56_base->regmap, CS35L56_DSP_VIRTUAL1_MBOX_1, &devid);
+
+	/* Wait for control port to be ready (datasheet tIRS). */
+	usleep_range(CS35L56_CONTROL_PORT_READY_US,
+		     CS35L56_CONTROL_PORT_READY_US + 400);
+
+	/*
+	 * The HALO_STATE register is in different locations on Ax and B0
+	 * devices so the REVID needs to be determined before waiting for the
+	 * firmware to boot.
+	 */
+	ret = regmap_read(cs35l56_base->regmap, CS35L56_REVID, &revid);
+	if (ret < 0) {
+		dev_err(cs35l56_base->dev, "Get Revision ID failed\n");
+		return ret;
+	}
+	cs35l56_base->rev = revid & (CS35L56_AREVID_MASK | CS35L56_MTLREVID_MASK);
+
+	ret = cs35l56_wait_for_firmware_boot(cs35l56_base);
+	if (ret)
+		return ret;
+
+	ret = regmap_read(cs35l56_base->regmap, CS35L56_DEVID, &devid);
+	if (ret < 0) {
+		dev_err(cs35l56_base->dev, "Get Device ID failed\n");
+		return ret;
+	}
+	devid &= CS35L56_DEVID_MASK;
+
+	switch (devid) {
+	case 0x35A56:
+		break;
+	default:
+		dev_err(cs35l56_base->dev, "Unknown device %x\n", devid);
+		return ret;
+	}
+
+	ret = regmap_read(cs35l56_base->regmap, CS35L56_DSP_RESTRICT_STS1, &secured);
+	if (ret) {
+		dev_err(cs35l56_base->dev, "Get Secure status failed\n");
+		return ret;
+	}
+
+	/* When any bus is restricted treat the device as secured */
+	if (secured & CS35L56_RESTRICTED_MASK)
+		cs35l56_base->secured = true;
+
+	ret = regmap_read(cs35l56_base->regmap, CS35L56_OTPID, &otpid);
+	if (ret < 0) {
+		dev_err(cs35l56_base->dev, "Get OTP ID failed\n");
+		return ret;
+	}
+
+	dev_info(cs35l56_base->dev, "Cirrus Logic CS35L56%s Rev %02X OTP%d\n",
+		 cs35l56_base->secured ? "s" : "", cs35l56_base->rev, otpid);
+
+	/* Wake source and *_BLOCKED interrupts default to unmasked, so mask them */
+	regmap_write(cs35l56_base->regmap, CS35L56_IRQ1_MASK_20, 0xffffffff);
+	regmap_update_bits(cs35l56_base->regmap, CS35L56_IRQ1_MASK_1,
+			   CS35L56_AMP_SHORT_ERR_EINT1_MASK,
+			   0);
+	regmap_update_bits(cs35l56_base->regmap, CS35L56_IRQ1_MASK_8,
+			   CS35L56_TEMP_ERR_EINT1_MASK,
+			   0);
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(cs35l56_hw_init, SND_SOC_CS35L56_SHARED);
+
 static const u32 cs35l56_bclk_valid_for_pll_freq_table[] = {
 	[0x0C] = 128000,
 	[0x0F] = 256000,
diff --git a/sound/soc/codecs/cs35l56.c b/sound/soc/codecs/cs35l56.c
index 8b9b5822d515..f472bde6d21a 100644
--- a/sound/soc/codecs/cs35l56.c
+++ b/sound/soc/codecs/cs35l56.c
@@ -1130,7 +1130,6 @@ EXPORT_SYMBOL_NS_GPL(cs35l56_common_probe, SND_SOC_CS35L56_CORE);
 int cs35l56_init(struct cs35l56_private *cs35l56)
 {
 	int ret;
-	unsigned int devid, revid, otpid, secured;
 
 	/*
 	 * Check whether the actions associated with soft reset or one time
@@ -1147,66 +1146,9 @@ int cs35l56_init(struct cs35l56_private *cs35l56)
 	pm_runtime_set_active(cs35l56->base.dev);
 	pm_runtime_enable(cs35l56->base.dev);
 
-	/*
-	 * If the system is not using a reset_gpio then issue a
-	 * dummy read to force a wakeup.
-	 */
-	if (!cs35l56->base.reset_gpio)
-		regmap_read(cs35l56->base.regmap, CS35L56_DSP_VIRTUAL1_MBOX_1, &devid);
-
-	/* Wait for control port to be ready (datasheet tIRS). */
-	usleep_range(CS35L56_CONTROL_PORT_READY_US,
-		     CS35L56_CONTROL_PORT_READY_US + 400);
-
-	/*
-	 * The HALO_STATE register is in different locations on Ax and B0
-	 * devices so the REVID needs to be determined before waiting for the
-	 * firmware to boot.
-	 */
-	ret = regmap_read(cs35l56->base.regmap, CS35L56_REVID, &revid);
-	if (ret < 0) {
-		dev_err(cs35l56->base.dev, "Get Revision ID failed\n");
+	ret = cs35l56_hw_init(&cs35l56->base);
+	if (ret < 0)
 		return ret;
-	}
-	cs35l56->base.rev = revid & (CS35L56_AREVID_MASK | CS35L56_MTLREVID_MASK);
-
-	ret = cs35l56_wait_for_firmware_boot(&cs35l56->base);
-	if (ret)
-		return ret;
-
-	ret = regmap_read(cs35l56->base.regmap, CS35L56_DEVID, &devid);
-	if (ret < 0) {
-		dev_err(cs35l56->base.dev, "Get Device ID failed\n");
-		return ret;
-	}
-	devid &= CS35L56_DEVID_MASK;
-
-	switch (devid) {
-	case 0x35A56:
-		break;
-	default:
-		dev_err(cs35l56->base.dev, "Unknown device %x\n", devid);
-		return ret;
-	}
-
-	ret = regmap_read(cs35l56->base.regmap, CS35L56_DSP_RESTRICT_STS1, &secured);
-	if (ret) {
-		dev_err(cs35l56->base.dev, "Get Secure status failed\n");
-		return ret;
-	}
-
-	/* When any bus is restricted treat the device as secured */
-	if (secured & CS35L56_RESTRICTED_MASK)
-		cs35l56->base.secured = true;
-
-	ret = regmap_read(cs35l56->base.regmap, CS35L56_OTPID, &otpid);
-	if (ret < 0) {
-		dev_err(cs35l56->base.dev, "Get OTP ID failed\n");
-		return ret;
-	}
-
-	dev_info(cs35l56->base.dev, "Cirrus Logic CS35L56%s Rev %02X OTP%d\n",
-		 cs35l56->base.secured ? "s" : "", cs35l56->base.rev, otpid);
 
 	/* Populate the DSP information with the revision and security state */
 	cs35l56->dsp.part = devm_kasprintf(cs35l56->base.dev, GFP_KERNEL, "cs35l56%s-%02x",
@@ -1214,15 +1156,6 @@ int cs35l56_init(struct cs35l56_private *cs35l56)
 	if (!cs35l56->dsp.part)
 		return -ENOMEM;
 
-	/* Wake source and *_BLOCKED interrupts default to unmasked, so mask them */
-	regmap_write(cs35l56->base.regmap, CS35L56_IRQ1_MASK_20, 0xffffffff);
-	regmap_update_bits(cs35l56->base.regmap, CS35L56_IRQ1_MASK_1,
-			   CS35L56_AMP_SHORT_ERR_EINT1_MASK,
-			   0);
-	regmap_update_bits(cs35l56->base.regmap, CS35L56_IRQ1_MASK_8,
-			   CS35L56_TEMP_ERR_EINT1_MASK,
-			   0);
-
 	if (!cs35l56->base.reset_gpio) {
 		dev_dbg(cs35l56->base.dev, "No reset gpio: using soft reset\n");
 		cs35l56->soft_resetting = true;
-- 
2.30.2