On 27.11.18 10:30, PETER CHEN wrote:
> To support imx HSIC, there are some special requirement:
> - The HSIC pad is 1.2v, it may need to supply from external
> - The data/strobe pin needs to be pulled down first, and after
> host mode is initialized, the strobe pin needs to be pulled up
> - During the USB suspend/resume, special setting is needed
>
> Signed-off-by: Peter Chen <peter.c...@nxp.com>
Tested on i.MX6S with Microchip LAN9730 USB HSIC Ethernet Controller.
Reviewed-by: Frieder Schrempf <frieder.schre...@kontron.de>
Tested-by: Frieder Schrempf <frieder.schre...@kontron.de>
> ---
> drivers/usb/chipidea/ci_hdrc_imx.c | 140
> ++++++++++++++++++++++++++++++++-----
> drivers/usb/chipidea/ci_hdrc_imx.h | 9 ++-
> drivers/usb/chipidea/usbmisc_imx.c | 140
> +++++++++++++++++++++++++++++++++++++
> 3 files changed, 270 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c
> b/drivers/usb/chipidea/ci_hdrc_imx.c
> index 09b37c0d075d..56781c329db0 100644
> --- a/drivers/usb/chipidea/ci_hdrc_imx.c
> +++ b/drivers/usb/chipidea/ci_hdrc_imx.c
> @@ -14,6 +14,7 @@
> #include <linux/usb/chipidea.h>
> #include <linux/usb/of.h>
> #include <linux/clk.h>
> +#include <linux/pinctrl/consumer.h>
>
> #include "ci.h"
> #include "ci_hdrc_imx.h"
> @@ -85,6 +86,9 @@ struct ci_hdrc_imx_data {
> bool supports_runtime_pm;
> bool override_phy_control;
> bool in_lpm;
> + struct pinctrl *pinctrl;
> + struct pinctrl_state *pinctrl_hsic_active;
> + struct regulator *hsic_pad_regulator;
> /* SoC before i.mx6 (except imx23/imx28) needs three clks */
> bool need_three_clks;
> struct clk *clk_ipg;
> @@ -245,19 +249,49 @@ static void imx_disable_unprepare_clks(struct device
> *dev)
> }
> }
>
> +static int ci_hdrc_imx_notify_event(struct ci_hdrc *ci, unsigned int event)
> +{
> + struct device *dev = ci->dev->parent;
> + struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
> + int ret = 0;
> +
> + switch (event) {
> + case CI_HDRC_IMX_HSIC_ACTIVE_EVENT:
> + ret = pinctrl_select_state(data->pinctrl,
> + data->pinctrl_hsic_active);
> + if (ret)
> + dev_err(dev, "hsic_active select failed, err=%d\n",
> + ret);
> + break;
> + case CI_HDRC_IMX_HSIC_SUSPEND_EVENT:
> + ret = imx_usbmisc_hsic_set_connect(data->usbmisc_data);
> + if (ret)
> + dev_err(dev,
> + "hsic_set_connect failed, err=%d\n", ret);
> + break;
> + default:
> + break;
> + }
> +
> + return ret;
> +}
> +
> static int ci_hdrc_imx_probe(struct platform_device *pdev)
> {
> struct ci_hdrc_imx_data *data;
> struct ci_hdrc_platform_data pdata = {
> .name = dev_name(&pdev->dev),
> .capoffset = DEF_CAPOFFSET,
> + .notify_event = ci_hdrc_imx_notify_event,
> };
> int ret;
> const struct of_device_id *of_id;
> const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
> struct device_node *np = pdev->dev.of_node;
> + struct device *dev = &pdev->dev;
> + struct pinctrl_state *pinctrl_hsic_idle;
>
> - of_id = of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
> + of_id = of_match_device(ci_hdrc_imx_dt_ids, dev);
> if (!of_id)
> return -ENODEV;
>
> @@ -268,19 +302,73 @@ static int ci_hdrc_imx_probe(struct platform_device
> *pdev)
> return -ENOMEM;
>
> platform_set_drvdata(pdev, data);
> - data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
> + data->usbmisc_data = usbmisc_get_init_data(dev);
> if (IS_ERR(data->usbmisc_data))
> return PTR_ERR(data->usbmisc_data);
>
> - ret = imx_get_clks(&pdev->dev);
> + if (of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC) {
> + pdata.flags |= CI_HDRC_IMX_IS_HSIC;
> + data->usbmisc_data->hsic = 1;
> + data->pinctrl = devm_pinctrl_get(dev);
> + if (IS_ERR(data->pinctrl)) {
> + dev_err(dev, "pinctrl get failed, err=%ld\n",
> + PTR_ERR(data->pinctrl));
> + return PTR_ERR(data->pinctrl);
> + }
> +
> + pinctrl_hsic_idle = pinctrl_lookup_state(data->pinctrl, "idle");
> + if (IS_ERR(pinctrl_hsic_idle)) {
> + dev_err(dev,
> + "pinctrl_hsic_idle lookup failed, err=%ld\n",
> + PTR_ERR(pinctrl_hsic_idle));
> + return PTR_ERR(pinctrl_hsic_idle);
> + }
> +
> + ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle);
> + if (ret) {
> + dev_err(dev, "hsic_idle select failed, err=%d\n", ret);
> + return ret;
> + }
> +
> + data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl,
> + "active");
> + if (IS_ERR(data->pinctrl_hsic_active)) {
> + dev_err(dev,
> + "pinctrl_hsic_active lookup failed, err=%ld\n",
> + PTR_ERR(data->pinctrl_hsic_active));
> + return PTR_ERR(data->pinctrl_hsic_active);
> + }
> +
> + data->hsic_pad_regulator = devm_regulator_get(dev, "hsic");
> + if (PTR_ERR(data->hsic_pad_regulator) == -EPROBE_DEFER) {
> + return -EPROBE_DEFER;
> + } else if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) {
> + /* no pad regualator is needed */
> + data->hsic_pad_regulator = NULL;
> + } else if (IS_ERR(data->hsic_pad_regulator)) {
> + dev_err(dev, "Get HSIC pad regulator error: %ld\n",
> + PTR_ERR(data->hsic_pad_regulator));
> + return PTR_ERR(data->hsic_pad_regulator);
> + }
> +
> + if (data->hsic_pad_regulator) {
> + ret = regulator_enable(data->hsic_pad_regulator);
> + if (ret) {
> + dev_err(dev,
> + "Failed to enable HSIC pad
> regulator\n");
> + return ret;
> + }
> + }
> + }
> + ret = imx_get_clks(dev);
> if (ret)
> - return ret;
> + goto disable_hsic_regulator;
>
> - ret = imx_prepare_enable_clks(&pdev->dev);
> + ret = imx_prepare_enable_clks(dev);
> if (ret)
> - return ret;
> + goto disable_hsic_regulator;
>
> - data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
> + data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0);
> if (IS_ERR(data->phy)) {
> ret = PTR_ERR(data->phy);
> /* Return -EINVAL if no usbphy is available */
> @@ -305,40 +393,43 @@ static int ci_hdrc_imx_probe(struct platform_device
> *pdev)
>
> ret = imx_usbmisc_init(data->usbmisc_data);
> if (ret) {
> - dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret);
> + dev_err(dev, "usbmisc init failed, ret=%d\n", ret);
> goto err_clk;
> }
>
> - data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
> + data->ci_pdev = ci_hdrc_add_device(dev,
> pdev->resource, pdev->num_resources,
> &pdata);
> if (IS_ERR(data->ci_pdev)) {
> ret = PTR_ERR(data->ci_pdev);
> if (ret != -EPROBE_DEFER)
> - dev_err(&pdev->dev,
> - "ci_hdrc_add_device failed, err=%d\n", ret);
> + dev_err(dev, "ci_hdrc_add_device failed, err=%d\n",
> + ret);
> goto err_clk;
> }
>
> ret = imx_usbmisc_init_post(data->usbmisc_data);
> if (ret) {
> - dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret);
> + dev_err(dev, "usbmisc post failed, ret=%d\n", ret);
> goto disable_device;
> }
>
> if (data->supports_runtime_pm) {
> - pm_runtime_set_active(&pdev->dev);
> - pm_runtime_enable(&pdev->dev);
> + pm_runtime_set_active(dev);
> + pm_runtime_enable(dev);
> }
>
> - device_set_wakeup_capable(&pdev->dev, true);
> + device_set_wakeup_capable(dev, true);
>
> return 0;
>
> disable_device:
> ci_hdrc_remove_device(data->ci_pdev);
> err_clk:
> - imx_disable_unprepare_clks(&pdev->dev);
> + imx_disable_unprepare_clks(dev);
> +disable_hsic_regulator:
> + if (data->hsic_pad_regulator)
> + ret = regulator_disable(data->hsic_pad_regulator);
> return ret;
> }
>
> @@ -355,6 +446,8 @@ static int ci_hdrc_imx_remove(struct platform_device
> *pdev)
> if (data->override_phy_control)
> usb_phy_shutdown(data->phy);
> imx_disable_unprepare_clks(&pdev->dev);
> + if (data->hsic_pad_regulator)
> + regulator_disable(data->hsic_pad_regulator);
>
> return 0;
> }
> @@ -367,9 +460,16 @@ static void ci_hdrc_imx_shutdown(struct platform_device
> *pdev)
> static int __maybe_unused imx_controller_suspend(struct device *dev)
> {
> struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
> + int ret = 0;
>
> dev_dbg(dev, "at %s\n", __func__);
>
> + ret = imx_usbmisc_hsic_set_clk(data->usbmisc_data, false);
> + if (ret) {
> + dev_err(dev, "usbmisc hsic_set_clk failed, ret=%d\n", ret);
> + return ret;
> + }
> +
> imx_disable_unprepare_clks(dev);
> data->in_lpm = true;
>
> @@ -400,8 +500,16 @@ static int __maybe_unused imx_controller_resume(struct
> device *dev)
> goto clk_disable;
> }
>
> + ret = imx_usbmisc_hsic_set_clk(data->usbmisc_data, true);
> + if (ret) {
> + dev_err(dev, "usbmisc hsic_set_clk failed, ret=%d\n", ret);
> + goto hsic_set_clk_fail;
> + }
> +
> return 0;
>
> +hsic_set_clk_fail:
> + imx_usbmisc_set_wakeup(data->usbmisc_data, true);
> clk_disable:
> imx_disable_unprepare_clks(dev);
> return ret;
> diff --git a/drivers/usb/chipidea/ci_hdrc_imx.h
> b/drivers/usb/chipidea/ci_hdrc_imx.h
> index 204275f47573..fcecab478934 100644
> --- a/drivers/usb/chipidea/ci_hdrc_imx.h
> +++ b/drivers/usb/chipidea/ci_hdrc_imx.h
> @@ -14,10 +14,13 @@ struct imx_usbmisc_data {
> unsigned int oc_polarity:1; /* over current polarity if oc enabled */
> unsigned int evdo:1; /* set external vbus divider option */
> unsigned int ulpi:1; /* connected to an ULPI phy */
> + unsigned int hsic:1; /* HSIC controlller */
> };
>
> -int imx_usbmisc_init(struct imx_usbmisc_data *);
> -int imx_usbmisc_init_post(struct imx_usbmisc_data *);
> -int imx_usbmisc_set_wakeup(struct imx_usbmisc_data *, bool);
> +int imx_usbmisc_init(struct imx_usbmisc_data *data);
> +int imx_usbmisc_init_post(struct imx_usbmisc_data *data);
> +int imx_usbmisc_set_wakeup(struct imx_usbmisc_data *data, bool enabled);
> +int imx_usbmisc_hsic_set_connect(struct imx_usbmisc_data *data);
> +int imx_usbmisc_hsic_set_clk(struct imx_usbmisc_data *data, bool on);
>
> #endif /* __DRIVER_USB_CHIPIDEA_CI_HDRC_IMX_H */
> diff --git a/drivers/usb/chipidea/usbmisc_imx.c
> b/drivers/usb/chipidea/usbmisc_imx.c
> index def80ff547e4..43a15a6e86f5 100644
> --- a/drivers/usb/chipidea/usbmisc_imx.c
> +++ b/drivers/usb/chipidea/usbmisc_imx.c
> @@ -64,10 +64,22 @@
> #define MX6_BM_OVER_CUR_DIS BIT(7)
> #define MX6_BM_OVER_CUR_POLARITY BIT(8)
> #define MX6_BM_WAKEUP_ENABLE BIT(10)
> +#define MX6_BM_UTMI_ON_CLOCK BIT(13)
> #define MX6_BM_ID_WAKEUP BIT(16)
> #define MX6_BM_VBUS_WAKEUP BIT(17)
> #define MX6SX_BM_DPDM_WAKEUP_EN BIT(29)
> #define MX6_BM_WAKEUP_INTR BIT(31)
> +
> +#define MX6_USB_HSIC_CTRL_OFFSET 0x10
> +/* Send resume signal without 480Mhz PHY clock */
> +#define MX6SX_BM_HSIC_AUTO_RESUME BIT(23)
> +/* set before portsc.suspendM = 1 */
> +#define MX6_BM_HSIC_DEV_CONN BIT(21)
> +/* HSIC enable */
> +#define MX6_BM_HSIC_EN BIT(12)
> +/* Force HSIC module 480M clock on, even when in Host is in suspend mode */
> +#define MX6_BM_HSIC_CLK_ON BIT(11)
> +
> #define MX6_USB_OTG1_PHY_CTRL 0x18
> /* For imx6dql, it is host-only controller, for later imx6, it is otg's */
> #define MX6_USB_OTG2_PHY_CTRL 0x1c
> @@ -94,6 +106,10 @@ struct usbmisc_ops {
> int (*post)(struct imx_usbmisc_data *data);
> /* It's called when we need to enable/disable usb wakeup */
> int (*set_wakeup)(struct imx_usbmisc_data *data, bool enabled);
> + /* It's called before setting portsc.suspendM */
> + int (*hsic_set_connect)(struct imx_usbmisc_data *data);
> + /* It's called during suspend/resume */
> + int (*hsic_set_clk)(struct imx_usbmisc_data *data, bool enabled);
> };
>
> struct imx_usbmisc {
> @@ -353,6 +369,18 @@ static int usbmisc_imx6q_init(struct imx_usbmisc_data
> *data)
> writel(reg | MX6_BM_NON_BURST_SETTING,
> usbmisc->base + data->index * 4);
>
> + /* For HSIC controller */
> + if (data->hsic) {
> + reg = readl(usbmisc->base + data->index * 4);
> + writel(reg | MX6_BM_UTMI_ON_CLOCK,
> + usbmisc->base + data->index * 4);
> + reg = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET
> + + (data->index - 2) * 4);
> + reg |= MX6_BM_HSIC_EN | MX6_BM_HSIC_CLK_ON;
> + writel(reg, usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET
> + + (data->index - 2) * 4);
> + }
> +
> spin_unlock_irqrestore(&usbmisc->lock, flags);
>
> usbmisc_imx6q_set_wakeup(data, false);
> @@ -360,6 +388,79 @@ static int usbmisc_imx6q_init(struct imx_usbmisc_data
> *data)
> return 0;
> }
>
> +static int usbmisc_imx6_hsic_get_reg_offset(struct imx_usbmisc_data *data)
> +{
> + int offset, ret = 0;
> +
> + if (data->index == 2 || data->index == 3) {
> + offset = (data->index - 2) * 4;
> + } else if (data->index == 0) {
> + /*
> + * For SoCs like i.MX7D and later, each USB controller has
> + * its own non-core register region. For SoCs before i.MX7D,
> + * the first two USB controllers are non-HSIC controllers.
> + */
> + offset = 0;
> + } else {
> + dev_err(data->dev, "index is error for usbmisc\n");
> + ret = -EINVAL;
> + }
> +
> + return ret ? ret : offset;
> +}
> +
> +static int usbmisc_imx6_hsic_set_connect(struct imx_usbmisc_data *data)
> +{
> + unsigned long flags;
> + u32 val;
> + struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
> + int offset;
> +
> + spin_lock_irqsave(&usbmisc->lock, flags);
> + offset = usbmisc_imx6_hsic_get_reg_offset(data);
> + if (offset < 0) {
> + spin_unlock_irqrestore(&usbmisc->lock, flags);
> + return offset;
> + }
> +
> + val = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
> + if (!(val & MX6_BM_HSIC_DEV_CONN))
> + writel(val | MX6_BM_HSIC_DEV_CONN,
> + usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
> +
> + spin_unlock_irqrestore(&usbmisc->lock, flags);
> +
> + return 0;
> +}
> +
> +static int usbmisc_imx6_hsic_set_clk(struct imx_usbmisc_data *data, bool on)
> +{
> + unsigned long flags;
> + u32 val;
> + struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
> + int offset;
> +
> + spin_lock_irqsave(&usbmisc->lock, flags);
> + offset = usbmisc_imx6_hsic_get_reg_offset(data);
> + if (offset < 0) {
> + spin_unlock_irqrestore(&usbmisc->lock, flags);
> + return offset;
> + }
> +
> + val = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
> + val |= MX6_BM_HSIC_EN | MX6_BM_HSIC_CLK_ON;
> + if (on)
> + val |= MX6_BM_HSIC_CLK_ON;
> + else
> + val &= ~MX6_BM_HSIC_CLK_ON;
> +
> + writel(val, usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
> + spin_unlock_irqrestore(&usbmisc->lock, flags);
> +
> + return 0;
> +}
> +
> +
> static int usbmisc_imx6sx_init(struct imx_usbmisc_data *data)
> {
> void __iomem *reg = NULL;
> @@ -385,6 +486,13 @@ static int usbmisc_imx6sx_init(struct imx_usbmisc_data
> *data)
> spin_unlock_irqrestore(&usbmisc->lock, flags);
> }
>
> + /* For HSIC controller */
> + if (data->hsic) {
> + val = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET);
> + val |= MX6SX_BM_HSIC_AUTO_RESUME;
> + writel(val, usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET);
> + }
> +
> return 0;
> }
>
> @@ -454,6 +562,7 @@ static int usbmisc_imx7d_init(struct imx_usbmisc_data
> *data)
> reg &= ~MX7D_USB_VBUS_WAKEUP_SOURCE_MASK;
> writel(reg | MX7D_USB_VBUS_WAKEUP_SOURCE_BVALID,
> usbmisc->base + MX7D_USBNC_USB_CTRL2);
> +
> spin_unlock_irqrestore(&usbmisc->lock, flags);
>
> usbmisc_imx7d_set_wakeup(data, false);
> @@ -481,6 +590,8 @@ static const struct usbmisc_ops imx53_usbmisc_ops = {
> static const struct usbmisc_ops imx6q_usbmisc_ops = {
> .set_wakeup = usbmisc_imx6q_set_wakeup,
> .init = usbmisc_imx6q_init,
> + .hsic_set_connect = usbmisc_imx6_hsic_set_connect,
> + .hsic_set_clk = usbmisc_imx6_hsic_set_clk,
> };
>
> static const struct usbmisc_ops vf610_usbmisc_ops = {
> @@ -490,6 +601,8 @@ static const struct usbmisc_ops vf610_usbmisc_ops = {
> static const struct usbmisc_ops imx6sx_usbmisc_ops = {
> .set_wakeup = usbmisc_imx6q_set_wakeup,
> .init = usbmisc_imx6sx_init,
> + .hsic_set_connect = usbmisc_imx6_hsic_set_connect,
> + .hsic_set_clk = usbmisc_imx6_hsic_set_clk,
> };
>
> static const struct usbmisc_ops imx7d_usbmisc_ops = {
> @@ -546,6 +659,33 @@ int imx_usbmisc_set_wakeup(struct imx_usbmisc_data
> *data, bool enabled)
> }
> EXPORT_SYMBOL_GPL(imx_usbmisc_set_wakeup);
>
> +int imx_usbmisc_hsic_set_connect(struct imx_usbmisc_data *data)
> +{
> + struct imx_usbmisc *usbmisc;
> +
> + if (!data)
> + return 0;
> +
> + usbmisc = dev_get_drvdata(data->dev);
> + if (!usbmisc->ops->hsic_set_connect || !data->hsic)
> + return 0;
> + return usbmisc->ops->hsic_set_connect(data);
> +}
> +EXPORT_SYMBOL_GPL(imx_usbmisc_hsic_set_connect);
> +
> +int imx_usbmisc_hsic_set_clk(struct imx_usbmisc_data *data, bool on)
> +{
> + struct imx_usbmisc *usbmisc;
> +
> + if (!data)
> + return 0;
> +
> + usbmisc = dev_get_drvdata(data->dev);
> + if (!usbmisc->ops->hsic_set_clk || !data->hsic)
> + return 0;
> + return usbmisc->ops->hsic_set_clk(data, on);
> +}
> +EXPORT_SYMBOL_GPL(imx_usbmisc_hsic_set_clk);
> static const struct of_device_id usbmisc_imx_dt_ids[] = {
> {
> .compatible = "fsl,imx25-usbmisc",
>
