From: Frank Li <Frank.Li@nxp.com>
To: krzysztof.kozlowski@linaro.org
Cc: Frank.Li@nxp.com, bhelgaas@google.com, conor+dt@kernel.org,
devicetree@vger.kernel.org, festevam@gmail.com,
helgaas@kernel.org, hongxing.zhu@nxp.com, imx@lists.linux.dev,
kernel@pengutronix.de, krzysztof.kozlowski+dt@linaro.org,
kw@linux.com, l.stach@pengutronix.de,
linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
lpieralisi@kernel.org, manivannan.sadhasivam@linaro.org,
robh@kernel.org, s.hauer@pengutronix.de, shawnguo@kernel.org
Subject: [PATCH v8 08/16] PCI: imx6: Simplify switch-case logic by involve init_phy callback
Date: Mon, 8 Jan 2024 18:21:37 -0500 [thread overview]
Message-ID: <20240108232145.2116455-9-Frank.Li@nxp.com> (raw)
In-Reply-To: <20240108232145.2116455-1-Frank.Li@nxp.com>
Simplify switch-case logic by involve init_phy callback.
Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
Notes:
Change from v7 to v8:
- rework commit message
- wrap comments to 100 chars
- return 0 at imx7d_pcie_init_phy()
change from v1 to v4:
- none
drivers/pci/controller/dwc/pci-imx6.c | 134 +++++++++++++-------------
1 file changed, 69 insertions(+), 65 deletions(-)
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index fd83af238fa60..ac338a88fe21e 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -69,6 +69,9 @@ enum imx6_pcie_variants {
#define IMX6_PCIE_MAX_CLKS 6
#define IMX6_PCIE_MAX_INSTANCES 2
+
+struct imx6_pcie;
+
struct imx6_pcie_drvdata {
enum imx6_pcie_variants variant;
enum dw_pcie_device_mode mode;
@@ -81,6 +84,7 @@ struct imx6_pcie_drvdata {
const u32 ltssm_mask;
const u32 mode_off[IMX6_PCIE_MAX_INSTANCES];
const u32 mode_mask[IMX6_PCIE_MAX_INSTANCES];
+ int (*init_phy)(struct imx6_pcie *pcie);
};
struct imx6_pcie {
@@ -322,76 +326,66 @@ static int pcie_phy_write(struct imx6_pcie *imx6_pcie, int addr, u16 data)
return 0;
}
-static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie)
+static int imx8mq_pcie_init_phy(struct imx6_pcie *imx6_pcie)
{
- switch (imx6_pcie->drvdata->variant) {
- case IMX8MM:
- case IMX8MM_EP:
- case IMX8MP:
- case IMX8MP_EP:
- /*
- * The PHY initialization had been done in the PHY
- * driver, break here directly.
- */
- break;
- case IMX8MQ:
- case IMX8MQ_EP:
- /*
- * TODO: Currently this code assumes external
- * oscillator is being used
- */
+ /* TODO: Currently this code assumes external oscillator is being used */
+ regmap_update_bits(imx6_pcie->iomuxc_gpr,
+ imx6_pcie_grp_offset(imx6_pcie),
+ IMX8MQ_GPR_PCIE_REF_USE_PAD,
+ IMX8MQ_GPR_PCIE_REF_USE_PAD);
+ /*
+ * Regarding the datasheet, the PCIE_VPH is suggested to be 1.8V. If the PCIE_VPH is
+ * supplied by 3.3V, the VREG_BYPASS should be cleared to zero.
+ */
+ if (imx6_pcie->vph && regulator_get_voltage(imx6_pcie->vph) > 3000000)
regmap_update_bits(imx6_pcie->iomuxc_gpr,
imx6_pcie_grp_offset(imx6_pcie),
- IMX8MQ_GPR_PCIE_REF_USE_PAD,
- IMX8MQ_GPR_PCIE_REF_USE_PAD);
- /*
- * Regarding the datasheet, the PCIE_VPH is suggested
- * to be 1.8V. If the PCIE_VPH is supplied by 3.3V, the
- * VREG_BYPASS should be cleared to zero.
- */
- if (imx6_pcie->vph &&
- regulator_get_voltage(imx6_pcie->vph) > 3000000)
- regmap_update_bits(imx6_pcie->iomuxc_gpr,
- imx6_pcie_grp_offset(imx6_pcie),
- IMX8MQ_GPR_PCIE_VREG_BYPASS,
- 0);
- break;
- case IMX7D:
- regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
- IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, 0);
- break;
- case IMX6SX:
- regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
- IMX6SX_GPR12_PCIE_RX_EQ_MASK,
- IMX6SX_GPR12_PCIE_RX_EQ_2);
- fallthrough;
- default:
- regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
+ IMX8MQ_GPR_PCIE_VREG_BYPASS,
+ 0);
+
+ return 0;
+}
+
+static int imx7d_pcie_init_phy(struct imx6_pcie *imx6_pcie)
+{
+ regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, 0);
+
+ return 0;
+}
+
+static int imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie)
+{
+ regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
IMX6Q_GPR12_PCIE_CTL_2, 0 << 10);
- /* configure constant input signal to the pcie ctrl and phy */
- regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
- IMX6Q_GPR12_LOS_LEVEL, 9 << 4);
-
- regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
- IMX6Q_GPR8_TX_DEEMPH_GEN1,
- imx6_pcie->tx_deemph_gen1 << 0);
- regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
- IMX6Q_GPR8_TX_DEEMPH_GEN2_3P5DB,
- imx6_pcie->tx_deemph_gen2_3p5db << 6);
- regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
- IMX6Q_GPR8_TX_DEEMPH_GEN2_6DB,
- imx6_pcie->tx_deemph_gen2_6db << 12);
- regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
- IMX6Q_GPR8_TX_SWING_FULL,
- imx6_pcie->tx_swing_full << 18);
- regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
- IMX6Q_GPR8_TX_SWING_LOW,
- imx6_pcie->tx_swing_low << 25);
- break;
- }
+ /* configure constant input signal to the pcie ctrl and phy */
+ regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
+ IMX6Q_GPR12_LOS_LEVEL, 9 << 4);
+
+ regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
+ IMX6Q_GPR8_TX_DEEMPH_GEN1,
+ imx6_pcie->tx_deemph_gen1 << 0);
+ regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
+ IMX6Q_GPR8_TX_DEEMPH_GEN2_3P5DB,
+ imx6_pcie->tx_deemph_gen2_3p5db << 6);
+ regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
+ IMX6Q_GPR8_TX_DEEMPH_GEN2_6DB,
+ imx6_pcie->tx_deemph_gen2_6db << 12);
+ regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
+ IMX6Q_GPR8_TX_SWING_FULL,
+ imx6_pcie->tx_swing_full << 18);
+ regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR8,
+ IMX6Q_GPR8_TX_SWING_LOW,
+ imx6_pcie->tx_swing_low << 25);
+ return 0;
+}
- imx6_pcie_configure_type(imx6_pcie);
+static int imx6sx_pcie_init_phy(struct imx6_pcie *imx6_pcie)
+{
+ regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
+ IMX6SX_GPR12_PCIE_RX_EQ_MASK, IMX6SX_GPR12_PCIE_RX_EQ_2);
+
+ return imx6_pcie_init_phy(imx6_pcie);
}
static void imx7d_pcie_wait_for_phy_pll_lock(struct imx6_pcie *imx6_pcie)
@@ -902,7 +896,11 @@ static int imx6_pcie_host_init(struct dw_pcie_rp *pp)
}
imx6_pcie_assert_core_reset(imx6_pcie);
- imx6_pcie_init_phy(imx6_pcie);
+
+ if (imx6_pcie->drvdata->init_phy)
+ imx6_pcie->drvdata->init_phy(imx6_pcie);
+
+ imx6_pcie_configure_type(imx6_pcie);
ret = imx6_pcie_clk_enable(imx6_pcie);
if (ret) {
@@ -1386,6 +1384,7 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.ltssm_mask = IMX6Q_GPR12_PCIE_CTL_2,
.mode_off[0] = IOMUXC_GPR12,
.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+ .init_phy = imx6_pcie_init_phy,
},
[IMX6SX] = {
.variant = IMX6SX,
@@ -1399,6 +1398,7 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.ltssm_mask = IMX6Q_GPR12_PCIE_CTL_2,
.mode_off[0] = IOMUXC_GPR12,
.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+ .init_phy = imx6sx_pcie_init_phy,
},
[IMX6QP] = {
.variant = IMX6QP,
@@ -1413,6 +1413,7 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.ltssm_mask = IMX6Q_GPR12_PCIE_CTL_2,
.mode_off[0] = IOMUXC_GPR12,
.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+ .init_phy = imx6_pcie_init_phy,
},
[IMX7D] = {
.variant = IMX7D,
@@ -1424,6 +1425,7 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.clks_cnt = ARRAY_SIZE(imx6_3clks_bus_pcie_phy),
.mode_off[0] = IOMUXC_GPR12,
.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
+ .init_phy = imx7d_pcie_init_phy,
},
[IMX8MQ] = {
.variant = IMX8MQ,
@@ -1436,6 +1438,7 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
.mode_off[1] = IOMUXC_GPR12,
.mode_mask[1] = IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE,
+ .init_phy = imx8mq_pcie_init_phy,
},
[IMX8MM] = {
.variant = IMX8MM,
@@ -1471,6 +1474,7 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
.mode_off[1] = IOMUXC_GPR12,
.mode_mask[1] = IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE,
+ .init_phy = imx8mq_pcie_init_phy,
},
[IMX8MM_EP] = {
.variant = IMX8MM_EP,
--
2.34.1
next prev parent reply other threads:[~2024-01-08 23:22 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-08 23:21 [PATCH v8 00/16] PCI: imx6: Clean up and add imx95 pci support Frank Li
2024-01-08 23:21 ` [PATCH v8 01/16] PCI: imx6: Simplify clock handling by using clk_bulk*() function Frank Li
2024-01-19 8:17 ` Manivannan Sadhasivam
2024-01-08 23:21 ` [PATCH v8 02/16] PCI: imx6: Simplify phy handling by using IMX6_PCIE_FLAG_HAS_PHYDRV Frank Li
2024-01-19 8:21 ` Manivannan Sadhasivam
2024-01-08 23:21 ` [PATCH v8 03/16] PCI: imx6: Simplify reset handling by using by using *_FLAG_HAS_*_RESET Frank Li
2024-01-08 23:21 ` [PATCH v8 04/16] dt-bindings: imx6q-pcie: Add linux,pci-domain as required for iMX8MQ Frank Li
2024-01-09 18:24 ` Rob Herring
2024-01-09 18:24 ` Rob Herring
2024-01-08 23:21 ` [PATCH v8 05/16] PCI: imx6: Using "linux,pci-domain" as slot ID Frank Li
2024-01-08 23:21 ` [PATCH v8 06/16] PCI: imx6: Simplify ltssm_enable() by using ltssm_off and ltssm_mask Frank Li
2024-01-08 23:21 ` [PATCH v8 07/16] PCI: imx6: Simplify configure_type() by using mode_off and mode_mask Frank Li
2024-01-19 8:22 ` Manivannan Sadhasivam
2024-01-08 23:21 ` Frank Li [this message]
2024-01-19 8:25 ` [PATCH v8 08/16] PCI: imx6: Simplify switch-case logic by involve init_phy callback Manivannan Sadhasivam
2024-01-08 23:21 ` [PATCH v8 09/16] dt-bindings: imx6q-pcie: Clean up irrationality clocks check Frank Li
2024-01-08 23:21 ` [PATCH v8 10/16] dt-bindings: imx6q-pcie: restruct reg and reg-name Frank Li
2024-01-08 23:21 ` [PATCH v8 11/16] dt-bindings: imx6q-pcie: Add imx95 pcie compatible string Frank Li
2024-01-09 18:27 ` Rob Herring
2024-01-08 23:21 ` [PATCH v8 12/16] PCI: imx6: Add iMX95 PCIe Root Complex support Frank Li
2024-01-19 8:27 ` Manivannan Sadhasivam
2024-01-08 23:21 ` [PATCH v8 13/16] PCI: imx6: Clean up get addr_space code Frank Li
2024-01-08 23:21 ` [PATCH v8 14/16] PCI: imx6: Add epc_features in imx6_pcie_drvdata Frank Li
2024-01-08 23:21 ` [PATCH v8 15/16] dt-bindings: imx6q-pcie: Add iMX95 pcie endpoint compatible string Frank Li
2024-01-09 18:27 ` Rob Herring
2024-01-08 23:21 ` [PATCH v8 16/16] PCI: imx6: Add iMX95 Endpoint (EP) support Frank Li
2024-01-19 8:36 ` Manivannan Sadhasivam
2024-01-15 19:47 ` [PATCH v8 00/16] PCI: imx6: Clean up and add imx95 pci support Frank Li
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