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Thu, 26 Mar 2020 06:45:19 -0700 (PDT) From: Neil Armstrong To: kishon@ti.com, balbi@kernel.org, khilman@baylibre.com, martin.blumenstingl@googlemail.com Subject: [PATCH v2 07/14] usb: dwc3: meson-g12a: refactor usb init Date: Thu, 26 Mar 2020 14:44:59 +0100 Message-Id: <20200326134507.4808-8-narmstrong@baylibre.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20200326134507.4808-1-narmstrong@baylibre.com> References: <20200326134507.4808-1-narmstrong@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200326_064521_535169_DD20481E X-CRM114-Status: GOOD ( 16.14 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-amlogic@lists.infradead.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Neil Armstrong Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Refactor the USB init code patch to handle the Amlogic GXL/GXM needing to initialize the OTG port as Peripheral mode for the DWC2 IP to probe correctly. A secondary, post_init callback is added to setup the OTG PHY mode after the sub-nodes probe. Signed-off-by: Neil Armstrong --- drivers/usb/dwc3/dwc3-meson-g12a.c | 46 +++++++++++++++++++++--------- 1 file changed, 33 insertions(+), 13 deletions(-) diff --git a/drivers/usb/dwc3/dwc3-meson-g12a.c b/drivers/usb/dwc3/dwc3-meson-g12a.c index 328e74def56f..43b398b7b1f7 100644 --- a/drivers/usb/dwc3/dwc3-meson-g12a.c +++ b/drivers/usb/dwc3/dwc3-meson-g12a.c @@ -140,6 +140,8 @@ struct dwc3_meson_g12a_drvdata { enum phy_mode mode); int (*set_phy_mode)(struct dwc3_meson_g12a *priv, int i, enum phy_mode mode); + int (*usb_init)(struct dwc3_meson_g12a *priv); + int (*usb_post_init)(struct dwc3_meson_g12a *priv); }; static int dwc3_meson_g12a_setup_regmaps(struct dwc3_meson_g12a *priv, @@ -151,6 +153,8 @@ static int dwc3_meson_g12a_usb2_init_phy(struct dwc3_meson_g12a *priv, int i, static int dwc3_meson_g12a_set_phy_mode(struct dwc3_meson_g12a *priv, int i, enum phy_mode mode); +static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv); + static struct dwc3_meson_g12a_drvdata g12a_drvdata = { .otg_switch_supported = true, .clks = meson_g12a_clocks, @@ -160,6 +164,7 @@ static struct dwc3_meson_g12a_drvdata g12a_drvdata = { .setup_regmaps = dwc3_meson_g12a_setup_regmaps, .usb2_init_phy = dwc3_meson_g12a_usb2_init_phy, .set_phy_mode = dwc3_meson_g12a_set_phy_mode, + .usb_init = dwc3_meson_g12a_usb_init, }; static struct dwc3_meson_g12a_drvdata a1_drvdata = { @@ -171,6 +176,7 @@ static struct dwc3_meson_g12a_drvdata a1_drvdata = { .setup_regmaps = dwc3_meson_g12a_setup_regmaps, .usb2_init_phy = dwc3_meson_g12a_usb2_init_phy, .set_phy_mode = dwc3_meson_g12a_set_phy_mode, + .usb_init = dwc3_meson_g12a_usb_init, }; struct dwc3_meson_g12a { @@ -231,15 +237,11 @@ static int dwc3_meson_g12a_usb2_init_phy(struct dwc3_meson_g12a *priv, int i, return 0; } -static int dwc3_meson_g12a_usb2_init(struct dwc3_meson_g12a *priv) +static int dwc3_meson_g12a_usb2_init(struct dwc3_meson_g12a *priv, + enum phy_mode mode) { int i, ret; - if (priv->otg_mode == USB_DR_MODE_PERIPHERAL) - priv->otg_phy_mode = PHY_MODE_USB_DEVICE; - else - priv->otg_phy_mode = PHY_MODE_USB_HOST; - for (i = 0; i < priv->drvdata->num_phys; ++i) { if (!priv->phys[i]) continue; @@ -284,9 +286,10 @@ static void dwc3_meson_g12a_usb3_init(struct dwc3_meson_g12a *priv) FIELD_PREP(USB_R1_P30_PCS_TX_SWING_FULL_MASK, 127)); } -static void dwc3_meson_g12a_usb_otg_apply_mode(struct dwc3_meson_g12a *priv) +static void dwc3_meson_g12a_usb_otg_apply_mode(struct dwc3_meson_g12a *priv, + enum phy_mode mode) { - if (priv->otg_phy_mode == PHY_MODE_USB_DEVICE) { + if (mode == PHY_MODE_USB_DEVICE) { regmap_update_bits(priv->usb_glue_regmap, USB_R0, USB_R0_U2D_ACT, USB_R0_U2D_ACT); regmap_update_bits(priv->usb_glue_regmap, USB_R0, @@ -301,11 +304,12 @@ static void dwc3_meson_g12a_usb_otg_apply_mode(struct dwc3_meson_g12a *priv) } } -static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv) +static int dwc3_meson_g12a_usb_init_glue(struct dwc3_meson_g12a *priv, + enum phy_mode mode) { int ret; - ret = dwc3_meson_g12a_usb2_init(priv); + ret = dwc3_meson_g12a_usb2_init(priv, mode); if (ret) return ret; @@ -327,7 +331,7 @@ static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv) if (priv->usb3_ports) dwc3_meson_g12a_usb3_init(priv); - dwc3_meson_g12a_usb_otg_apply_mode(priv); + dwc3_meson_g12a_usb_otg_apply_mode(priv, mode); return 0; } @@ -406,7 +410,7 @@ static int dwc3_meson_g12a_otg_mode_set(struct dwc3_meson_g12a *priv, if (ret) return ret; - dwc3_meson_g12a_usb_otg_apply_mode(priv); + dwc3_meson_g12a_usb_otg_apply_mode(priv, mode); return 0; } @@ -553,6 +557,11 @@ static int dwc3_meson_g12a_setup_regmaps(struct dwc3_meson_g12a *priv, return 0; } +static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv) +{ + return dwc3_meson_g12a_usb_init_glue(priv, priv->otg_phy_mode); +} + static int dwc3_meson_g12a_probe(struct platform_device *pdev) { struct dwc3_meson_g12a *priv; @@ -620,7 +629,12 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev) /* Get dr_mode */ priv->otg_mode = usb_get_dr_mode(dev); - ret = dwc3_meson_g12a_usb_init(priv); + if (priv->otg_mode == USB_DR_MODE_PERIPHERAL) + priv->otg_phy_mode = PHY_MODE_USB_DEVICE; + else + priv->otg_phy_mode = PHY_MODE_USB_HOST; + + ret = priv->drvdata->usb_init(priv); if (ret) goto err_disable_clks; @@ -642,6 +656,12 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev) if (ret) goto err_phys_power; + if (priv->drvdata->usb_post_init) { + ret = priv->drvdata->usb_post_init(priv); + if (ret) + goto err_phys_power; + } + ret = dwc3_meson_g12a_otg_init(pdev, priv); if (ret) goto err_phys_power; -- 2.22.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel