netdev - [PATCH net-next 8/8] net: ipa: encapsulate updating three more registers

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Date:   Thu, 22 Sep 2022 17:21:00 -0500
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com
Cc:     mka@...omium.org, evgreen@...omium.org, andersson@...nel.org,
        quic_cpratapa@...cinc.com, quic_avuyyuru@...cinc.com,
        quic_jponduru@...cinc.com, quic_subashab@...cinc.com,
        elder@...nel.org, netdev@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 8/8] net: ipa: encapsulate updating three more registers

Create a new function that encapsulates setting the BCR, TX_CFG, and
CLKON_CFG register values during hardware configuration.

Signed-off-by: Alex Elder <elder@...aro.org>
---
 drivers/net/ipa/ipa_main.c | 79 +++++++++++++++++++++++++-------------
 1 file changed, 53 insertions(+), 26 deletions(-)

diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
index 8bb4b036df2b4..a552d6edb702d 100644
--- a/drivers/net/ipa/ipa_main.c
+++ b/drivers/net/ipa/ipa_main.c
@@ -183,6 +183,56 @@ static void ipa_teardown(struct ipa *ipa)
 	gsi_teardown(&ipa->gsi);
 }
 
+static void
+ipa_hardware_config_bcr(struct ipa *ipa, const struct ipa_data *data)
+{
+	u32 val;
+
+	/* IPA v4.5+ has no backward compatibility register */
+	if (ipa->version >= IPA_VERSION_4_5)
+		return;
+
+	val = data->backward_compat;
+	iowrite32(val, ipa->reg_virt + IPA_REG_BCR_OFFSET);
+}
+
+static void ipa_hardware_config_tx(struct ipa *ipa)
+{
+	enum ipa_version version = ipa->version;
+	u32 val;
+
+	if (version <= IPA_VERSION_4_0 || version >= IPA_VERSION_4_5)
+		return;
+
+	/* Disable PA mask to allow HOLB drop */
+	val = ioread32(ipa->reg_virt + IPA_REG_TX_CFG_OFFSET);
+
+	val &= ~PA_MASK_EN_FMASK;
+
+	iowrite32(val, ipa->reg_virt + IPA_REG_TX_CFG_OFFSET);
+}
+
+static void ipa_hardware_config_clkon(struct ipa *ipa)
+{
+	enum ipa_version version = ipa->version;
+	u32 val;
+
+	if (version < IPA_VERSION_3_1 || version >= IPA_VERSION_4_5)
+		return;
+
+	/* Implement some hardware workarounds */
+	if (version >= IPA_VERSION_4_0) {
+		/* Enable open global clocks in the CLKON configuration */
+		val = GLOBAL_FMASK | GLOBAL_2X_CLK_FMASK;
+	} else if (version == IPA_VERSION_3_1) {
+		val = MISC_FMASK;	/* Disable MISC clock gating */
+	} else {
+		return;
+	}
+
+	iowrite32(val, ipa->reg_virt + IPA_REG_CLKON_CFG_OFFSET);
+}
+
 /* Configure bus access behavior for IPA components */
 static void ipa_hardware_config_comp(struct ipa *ipa)
 {
@@ -382,32 +432,9 @@ static void ipa_hardware_dcd_deconfig(struct ipa *ipa)
  */
 static void ipa_hardware_config(struct ipa *ipa, const struct ipa_data *data)
 {
-	enum ipa_version version = ipa->version;
-	u32 val;
-
-	/* IPA v4.5+ has no backward compatibility register */
-	if (version < IPA_VERSION_4_5) {
-		val = data->backward_compat;
-		iowrite32(val, ipa->reg_virt + IPA_REG_BCR_OFFSET);
-	}
-
-	/* Implement some hardware workarounds */
-	if (version >= IPA_VERSION_4_0 && version < IPA_VERSION_4_5) {
-		/* Disable PA mask to allow HOLB drop */
-		val = ioread32(ipa->reg_virt + IPA_REG_TX_CFG_OFFSET);
-		val &= ~PA_MASK_EN_FMASK;
-		iowrite32(val, ipa->reg_virt + IPA_REG_TX_CFG_OFFSET);
-
-		/* Enable open global clocks in the CLKON configuration */
-		val = GLOBAL_FMASK | GLOBAL_2X_CLK_FMASK;
-	} else if (version == IPA_VERSION_3_1) {
-		val = MISC_FMASK;	/* Disable MISC clock gating */
-	} else {
-		val = 0;		/* No CLKON configuration needed */
-	}
-	if (val)
-		iowrite32(val, ipa->reg_virt + IPA_REG_CLKON_CFG_OFFSET);
-
+	ipa_hardware_config_bcr(ipa, data);
+	ipa_hardware_config_tx(ipa);
+	ipa_hardware_config_clkon(ipa);
 	ipa_hardware_config_comp(ipa);
 	ipa_hardware_config_qsb(ipa, data);
 	ipa_hardware_config_timing(ipa);
-- 
2.34.1