usb: dwc3: Add Amlogic A1 DWC3 glue
Adds support for Amlogic A1 USB Control Glue HW. The Amlogic A1 SoC Family embeds 1 USB Controllers: - a DWC3 IP configured as Host for USB2 and USB3 A glue connects the controllers to the USB2 PHY of A1 SoC. Signed-off-by: Yue Wang <yue.wang@amlogic.com> Signed-off-by: Hanjie Lin <hanjie.lin@amlogic.com> Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
Hanjie Lin
Felipe Balbi
parent
8dcb5a119b
commit
1e355f21d3
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@ -107,10 +107,37 @@ static const char *phy_names[PHY_COUNT] = {
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"usb2-phy0", "usb2-phy1", "usb3-phy0",
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};
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static struct clk_bulk_data meson_g12a_clocks[] = {
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{ .id = NULL },
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};
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static struct clk_bulk_data meson_a1_clocks[] = {
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{ .id = "usb_ctrl" },
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{ .id = "usb_bus" },
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{ .id = "xtal_usb_ctrl" },
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};
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struct dwc3_meson_g12a_drvdata {
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bool otg_switch_supported;
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struct clk_bulk_data *clks;
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int num_clks;
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};
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static struct dwc3_meson_g12a_drvdata g12a_drvdata = {
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.otg_switch_supported = true,
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.clks = meson_g12a_clocks,
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.num_clks = ARRAY_SIZE(meson_g12a_clocks),
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};
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static struct dwc3_meson_g12a_drvdata a1_drvdata = {
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.otg_switch_supported = false,
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.clks = meson_a1_clocks,
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.num_clks = ARRAY_SIZE(meson_a1_clocks),
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};
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struct dwc3_meson_g12a {
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struct device *dev;
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struct regmap *regmap;
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struct clk *clk;
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struct reset_control *reset;
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struct phy *phys[PHY_COUNT];
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enum usb_dr_mode otg_mode;
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@ -120,6 +147,7 @@ struct dwc3_meson_g12a {
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struct regulator *vbus;
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struct usb_role_switch_desc switch_desc;
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struct usb_role_switch *role_switch;
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const struct dwc3_meson_g12a_drvdata *drvdata;
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};
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static void dwc3_meson_g12a_usb2_set_mode(struct dwc3_meson_g12a *priv,
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@ -151,7 +179,7 @@ static int dwc3_meson_g12a_usb2_init(struct dwc3_meson_g12a *priv)
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U2P_R0_POWER_ON_RESET,
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U2P_R0_POWER_ON_RESET);
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if (i == USB2_OTG_PHY) {
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if (priv->drvdata->otg_switch_supported && i == USB2_OTG_PHY) {
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regmap_update_bits(priv->regmap,
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U2P_R0 + (U2P_REG_SIZE * i),
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U2P_R0_ID_PULLUP | U2P_R0_DRV_VBUS,
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@ -295,7 +323,7 @@ static int dwc3_meson_g12a_otg_mode_set(struct dwc3_meson_g12a *priv,
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{
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int ret;
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if (!priv->phys[USB2_OTG_PHY])
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if (!priv->drvdata->otg_switch_supported || !priv->phys[USB2_OTG_PHY])
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return -EINVAL;
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if (mode == PHY_MODE_USB_HOST)
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@ -380,73 +408,15 @@ static struct device *dwc3_meson_g12_find_child(struct device *dev,
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return &pdev->dev;
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}
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static int dwc3_meson_g12a_probe(struct platform_device *pdev)
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static int dwc3_meson_g12a_otg_init(struct platform_device *pdev,
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struct dwc3_meson_g12a *priv)
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{
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struct dwc3_meson_g12a *priv;
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struct device *dev = &pdev->dev;
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struct device_node *np = dev->of_node;
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void __iomem *base;
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enum phy_mode otg_id;
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int ret, i, irq;
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int ret, irq;
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struct device *dev = &pdev->dev;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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base = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(base))
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return PTR_ERR(base);
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priv->regmap = devm_regmap_init_mmio(dev, base,
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&phy_meson_g12a_usb3_regmap_conf);
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if (IS_ERR(priv->regmap))
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return PTR_ERR(priv->regmap);
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priv->vbus = devm_regulator_get_optional(dev, "vbus");
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if (IS_ERR(priv->vbus)) {
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if (PTR_ERR(priv->vbus) == -EPROBE_DEFER)
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return PTR_ERR(priv->vbus);
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priv->vbus = NULL;
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}
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priv->clk = devm_clk_get(dev, NULL);
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if (IS_ERR(priv->clk))
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return PTR_ERR(priv->clk);
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ret = clk_prepare_enable(priv->clk);
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if (ret)
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return ret;
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devm_add_action_or_reset(dev,
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(void(*)(void *))clk_disable_unprepare,
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priv->clk);
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platform_set_drvdata(pdev, priv);
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priv->dev = dev;
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priv->reset = devm_reset_control_get(dev, NULL);
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if (IS_ERR(priv->reset)) {
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ret = PTR_ERR(priv->reset);
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dev_err(dev, "failed to get device reset, err=%d\n", ret);
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return ret;
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}
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ret = reset_control_reset(priv->reset);
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if (ret)
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return ret;
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ret = dwc3_meson_g12a_get_phys(priv);
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if (ret)
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return ret;
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if (priv->vbus) {
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ret = regulator_enable(priv->vbus);
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if (ret)
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return ret;
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}
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/* Get dr_mode */
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priv->otg_mode = usb_get_dr_mode(dev);
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if (!priv->drvdata->otg_switch_supported)
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return 0;
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if (priv->otg_mode == USB_DR_MODE_OTG) {
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/* Ack irq before registering */
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@ -461,28 +431,6 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev)
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return ret;
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}
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dwc3_meson_g12a_usb_init(priv);
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/* Init PHYs */
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for (i = 0 ; i < PHY_COUNT ; ++i) {
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ret = phy_init(priv->phys[i]);
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if (ret)
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return ret;
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}
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/* Set PHY Power */
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for (i = 0 ; i < PHY_COUNT ; ++i) {
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ret = phy_power_on(priv->phys[i]);
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if (ret)
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goto err_phys_exit;
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}
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ret = of_platform_populate(np, NULL, NULL, dev);
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if (ret) {
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clk_disable_unprepare(priv->clk);
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goto err_phys_power;
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}
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/* Setup OTG mode corresponding to the ID pin */
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if (priv->otg_mode == USB_DR_MODE_OTG) {
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otg_id = dwc3_meson_g12a_get_id(priv);
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@ -504,6 +452,101 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev)
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if (IS_ERR(priv->role_switch))
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dev_warn(dev, "Unable to register Role Switch\n");
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return ret;
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}
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static int dwc3_meson_g12a_probe(struct platform_device *pdev)
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{
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struct dwc3_meson_g12a *priv;
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struct device *dev = &pdev->dev;
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struct device_node *np = dev->of_node;
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void __iomem *base;
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int ret, i;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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base = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(base))
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return PTR_ERR(base);
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priv->regmap = devm_regmap_init_mmio(dev, base,
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&phy_meson_g12a_usb3_regmap_conf);
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if (IS_ERR(priv->regmap))
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return PTR_ERR(priv->regmap);
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priv->vbus = devm_regulator_get_optional(dev, "vbus");
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if (IS_ERR(priv->vbus)) {
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if (PTR_ERR(priv->vbus) == -EPROBE_DEFER)
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return PTR_ERR(priv->vbus);
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priv->vbus = NULL;
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}
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priv->drvdata = of_device_get_match_data(&pdev->dev);
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ret = devm_clk_bulk_get(dev,
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priv->drvdata->num_clks,
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priv->drvdata->clks);
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if (ret)
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return ret;
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ret = clk_bulk_prepare_enable(priv->drvdata->num_clks,
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priv->drvdata->clks);
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if (ret)
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return ret;
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platform_set_drvdata(pdev, priv);
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priv->dev = dev;
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priv->reset = devm_reset_control_get(dev, NULL);
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if (IS_ERR(priv->reset)) {
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ret = PTR_ERR(priv->reset);
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dev_err(dev, "failed to get device reset, err=%d\n", ret);
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return ret;
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}
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ret = reset_control_reset(priv->reset);
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if (ret)
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goto err_disable_clks;
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ret = dwc3_meson_g12a_get_phys(priv);
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if (ret)
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goto err_disable_clks;
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if (priv->vbus) {
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ret = regulator_enable(priv->vbus);
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if (ret)
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goto err_disable_clks;
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}
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/* Get dr_mode */
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priv->otg_mode = usb_get_dr_mode(dev);
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dwc3_meson_g12a_usb_init(priv);
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/* Init PHYs */
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for (i = 0 ; i < PHY_COUNT ; ++i) {
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ret = phy_init(priv->phys[i]);
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if (ret)
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goto err_disable_clks;
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}
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/* Set PHY Power */
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for (i = 0 ; i < PHY_COUNT ; ++i) {
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ret = phy_power_on(priv->phys[i]);
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if (ret)
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goto err_phys_exit;
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}
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ret = of_platform_populate(np, NULL, NULL, dev);
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if (ret)
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goto err_phys_power;
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ret = dwc3_meson_g12a_otg_init(pdev, priv);
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if (ret)
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goto err_phys_power;
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pm_runtime_set_active(dev);
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pm_runtime_enable(dev);
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pm_runtime_get_sync(dev);
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@ -518,6 +561,10 @@ err_phys_exit:
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for (i = 0 ; i < PHY_COUNT ; ++i)
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phy_exit(priv->phys[i]);
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err_disable_clks:
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clk_bulk_disable_unprepare(priv->drvdata->num_clks,
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priv->drvdata->clks);
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return ret;
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}
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@ -527,7 +574,8 @@ static int dwc3_meson_g12a_remove(struct platform_device *pdev)
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struct device *dev = &pdev->dev;
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int i;
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usb_role_switch_unregister(priv->role_switch);
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if (priv->drvdata->otg_switch_supported)
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usb_role_switch_unregister(priv->role_switch);
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of_platform_depopulate(dev);
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@ -540,6 +588,9 @@ static int dwc3_meson_g12a_remove(struct platform_device *pdev)
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pm_runtime_put_noidle(dev);
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pm_runtime_set_suspended(dev);
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clk_bulk_disable_unprepare(priv->drvdata->num_clks,
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priv->drvdata->clks);
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return 0;
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}
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@ -547,7 +598,8 @@ static int __maybe_unused dwc3_meson_g12a_runtime_suspend(struct device *dev)
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{
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struct dwc3_meson_g12a *priv = dev_get_drvdata(dev);
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clk_disable(priv->clk);
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clk_bulk_disable_unprepare(priv->drvdata->num_clks,
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priv->drvdata->clks);
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return 0;
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}
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@ -556,7 +608,8 @@ static int __maybe_unused dwc3_meson_g12a_runtime_resume(struct device *dev)
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{
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struct dwc3_meson_g12a *priv = dev_get_drvdata(dev);
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return clk_enable(priv->clk);
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return clk_bulk_prepare_enable(priv->drvdata->num_clks,
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priv->drvdata->clks);
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}
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static int __maybe_unused dwc3_meson_g12a_suspend(struct device *dev)
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@ -619,7 +672,14 @@ static const struct dev_pm_ops dwc3_meson_g12a_dev_pm_ops = {
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};
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static const struct of_device_id dwc3_meson_g12a_match[] = {
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{ .compatible = "amlogic,meson-g12a-usb-ctrl" },
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{
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.compatible = "amlogic,meson-g12a-usb-ctrl",
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.data = &g12a_drvdata,
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},
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{
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.compatible = "amlogic,meson-a1-usb-ctrl",
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.data = &a1_drvdata,
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},
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{ /* Sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, dwc3_meson_g12a_match);
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