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Sun, 24 Dec 2023 18:33:44 +0000 From: Frank Li 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 v6 08/16] PCI: imx6: Simplify switch-case logic by involve init_phy callback Date: Sun, 24 Dec 2023 13:32:34 -0500 Message-Id: <20231224183242.1675372-9-Frank.Li@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231224183242.1675372-1-Frank.Li@nxp.com> References: <20231224183242.1675372-1-Frank.Li@nxp.com> X-ClientProxiedBy: SJ0PR03CA0169.namprd03.prod.outlook.com (2603:10b6:a03:338::24) To AM6PR04MB4838.eurprd04.prod.outlook.com (2603:10a6:20b:4::16) Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM6PR04MB4838:EE_|AS5PR04MB10020:EE_ X-MS-Office365-Filtering-Correlation-Id: a9bc201a-13c5-4798-85f9-08dc04aedbc0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Signed-off-by: Frank Li --- Notes: change from v1 to v4: - none drivers/pci/controller/dwc/pci-imx6.c | 135 ++++++++++++++------------ 1 file changed, 71 insertions(+), 64 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 717e8fa030deb..d66a2db53bdb7 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; @@ -80,6 +83,7 @@ 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 { @@ -323,76 +327,69 @@ 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, + IMX8MQ_GPR_PCIE_VREG_BYPASS, + 0); + + return 0; +} + +static int imx7d_pcie_init_phy(struct imx6_pcie *imx6_pcie) +{ + return 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, +} + +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) @@ -903,7 +900,11 @@ 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) { @@ -1374,6 +1375,7 @@ 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, @@ -1386,6 +1388,7 @@ 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, @@ -1399,6 +1402,7 @@ 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, @@ -1409,6 +1413,7 @@ static const struct imx6_pcie_drvdata drvdata[] = { .clk_names = {"pcie_bus", "pcie", "pcie_phy"}, .mode_off[0] = IOMUXC_GPR12, .mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE, + .init_phy = imx7d_pcie_init_phy, }, [IMX8MQ] = { .variant = IMX8MQ, @@ -1420,6 +1425,7 @@ 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, @@ -1452,6 +1458,7 @@ 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,