usb: chipidea: imx: add HSIC support
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 Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de> Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de> Signed-off-by: Peter Chen <peter.chen@nxp.com>
This commit is contained in:
Peter Chen
parent
014abe34a9
commit
7c8e890941
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@ -14,6 +14,7 @@
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#include <linux/usb/chipidea.h>
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#include <linux/usb/of.h>
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#include <linux/clk.h>
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#include <linux/pinctrl/consumer.h>
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#include "ci.h"
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#include "ci_hdrc_imx.h"
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@ -85,6 +86,9 @@ struct ci_hdrc_imx_data {
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bool supports_runtime_pm;
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bool override_phy_control;
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bool in_lpm;
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struct pinctrl *pinctrl;
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struct pinctrl_state *pinctrl_hsic_active;
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struct regulator *hsic_pad_regulator;
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/* SoC before i.mx6 (except imx23/imx28) needs three clks */
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bool need_three_clks;
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struct clk *clk_ipg;
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@ -245,19 +249,49 @@ static void imx_disable_unprepare_clks(struct device *dev)
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}
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}
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static int ci_hdrc_imx_notify_event(struct ci_hdrc *ci, unsigned int event)
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{
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struct device *dev = ci->dev->parent;
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struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
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int ret = 0;
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switch (event) {
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case CI_HDRC_IMX_HSIC_ACTIVE_EVENT:
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ret = pinctrl_select_state(data->pinctrl,
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data->pinctrl_hsic_active);
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if (ret)
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dev_err(dev, "hsic_active select failed, err=%d\n",
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ret);
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break;
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case CI_HDRC_IMX_HSIC_SUSPEND_EVENT:
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ret = imx_usbmisc_hsic_set_connect(data->usbmisc_data);
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if (ret)
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dev_err(dev,
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"hsic_set_connect failed, err=%d\n", ret);
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break;
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default:
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break;
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}
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return ret;
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}
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static int ci_hdrc_imx_probe(struct platform_device *pdev)
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{
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struct ci_hdrc_imx_data *data;
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struct ci_hdrc_platform_data pdata = {
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.name = dev_name(&pdev->dev),
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.capoffset = DEF_CAPOFFSET,
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.notify_event = ci_hdrc_imx_notify_event,
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};
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int ret;
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const struct of_device_id *of_id;
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const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
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struct device_node *np = pdev->dev.of_node;
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struct device *dev = &pdev->dev;
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struct pinctrl_state *pinctrl_hsic_idle;
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of_id = of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
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of_id = of_match_device(ci_hdrc_imx_dt_ids, dev);
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if (!of_id)
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return -ENODEV;
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@ -268,19 +302,73 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
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return -ENOMEM;
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platform_set_drvdata(pdev, data);
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data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
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data->usbmisc_data = usbmisc_get_init_data(dev);
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if (IS_ERR(data->usbmisc_data))
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return PTR_ERR(data->usbmisc_data);
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ret = imx_get_clks(&pdev->dev);
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if (ret)
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return ret;
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if (of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC) {
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pdata.flags |= CI_HDRC_IMX_IS_HSIC;
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data->usbmisc_data->hsic = 1;
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data->pinctrl = devm_pinctrl_get(dev);
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if (IS_ERR(data->pinctrl)) {
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dev_err(dev, "pinctrl get failed, err=%ld\n",
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PTR_ERR(data->pinctrl));
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return PTR_ERR(data->pinctrl);
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}
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ret = imx_prepare_enable_clks(&pdev->dev);
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if (ret)
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return ret;
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pinctrl_hsic_idle = pinctrl_lookup_state(data->pinctrl, "idle");
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if (IS_ERR(pinctrl_hsic_idle)) {
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dev_err(dev,
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"pinctrl_hsic_idle lookup failed, err=%ld\n",
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PTR_ERR(pinctrl_hsic_idle));
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return PTR_ERR(pinctrl_hsic_idle);
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}
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data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
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ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle);
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if (ret) {
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dev_err(dev, "hsic_idle select failed, err=%d\n", ret);
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return ret;
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}
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data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl,
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"active");
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if (IS_ERR(data->pinctrl_hsic_active)) {
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dev_err(dev,
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"pinctrl_hsic_active lookup failed, err=%ld\n",
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PTR_ERR(data->pinctrl_hsic_active));
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return PTR_ERR(data->pinctrl_hsic_active);
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}
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data->hsic_pad_regulator = devm_regulator_get(dev, "hsic");
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if (PTR_ERR(data->hsic_pad_regulator) == -EPROBE_DEFER) {
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return -EPROBE_DEFER;
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} else if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) {
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/* no pad regualator is needed */
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data->hsic_pad_regulator = NULL;
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} else if (IS_ERR(data->hsic_pad_regulator)) {
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dev_err(dev, "Get HSIC pad regulator error: %ld\n",
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PTR_ERR(data->hsic_pad_regulator));
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return PTR_ERR(data->hsic_pad_regulator);
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}
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if (data->hsic_pad_regulator) {
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ret = regulator_enable(data->hsic_pad_regulator);
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if (ret) {
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dev_err(dev,
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"Failed to enable HSIC pad regulator\n");
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return ret;
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}
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}
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}
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ret = imx_get_clks(dev);
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if (ret)
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goto disable_hsic_regulator;
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ret = imx_prepare_enable_clks(dev);
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if (ret)
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goto disable_hsic_regulator;
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data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0);
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if (IS_ERR(data->phy)) {
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ret = PTR_ERR(data->phy);
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/* Return -EINVAL if no usbphy is available */
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@ -305,40 +393,43 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
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ret = imx_usbmisc_init(data->usbmisc_data);
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if (ret) {
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dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret);
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dev_err(dev, "usbmisc init failed, ret=%d\n", ret);
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goto err_clk;
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}
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data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
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data->ci_pdev = ci_hdrc_add_device(dev,
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pdev->resource, pdev->num_resources,
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&pdata);
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if (IS_ERR(data->ci_pdev)) {
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ret = PTR_ERR(data->ci_pdev);
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if (ret != -EPROBE_DEFER)
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dev_err(&pdev->dev,
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"ci_hdrc_add_device failed, err=%d\n", ret);
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dev_err(dev, "ci_hdrc_add_device failed, err=%d\n",
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ret);
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goto err_clk;
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}
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ret = imx_usbmisc_init_post(data->usbmisc_data);
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if (ret) {
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dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret);
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dev_err(dev, "usbmisc post failed, ret=%d\n", ret);
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goto disable_device;
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}
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if (data->supports_runtime_pm) {
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pm_runtime_set_active(&pdev->dev);
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pm_runtime_enable(&pdev->dev);
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pm_runtime_set_active(dev);
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pm_runtime_enable(dev);
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}
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device_set_wakeup_capable(&pdev->dev, true);
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device_set_wakeup_capable(dev, true);
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return 0;
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disable_device:
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ci_hdrc_remove_device(data->ci_pdev);
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err_clk:
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imx_disable_unprepare_clks(&pdev->dev);
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imx_disable_unprepare_clks(dev);
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disable_hsic_regulator:
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if (data->hsic_pad_regulator)
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ret = regulator_disable(data->hsic_pad_regulator);
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return ret;
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}
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@ -355,6 +446,8 @@ static int ci_hdrc_imx_remove(struct platform_device *pdev)
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if (data->override_phy_control)
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usb_phy_shutdown(data->phy);
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imx_disable_unprepare_clks(&pdev->dev);
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if (data->hsic_pad_regulator)
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regulator_disable(data->hsic_pad_regulator);
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return 0;
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}
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@ -367,9 +460,16 @@ static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
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static int __maybe_unused imx_controller_suspend(struct device *dev)
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{
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struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
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int ret = 0;
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dev_dbg(dev, "at %s\n", __func__);
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ret = imx_usbmisc_hsic_set_clk(data->usbmisc_data, false);
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if (ret) {
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dev_err(dev, "usbmisc hsic_set_clk failed, ret=%d\n", ret);
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return ret;
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}
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imx_disable_unprepare_clks(dev);
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data->in_lpm = true;
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@ -400,8 +500,16 @@ static int __maybe_unused imx_controller_resume(struct device *dev)
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goto clk_disable;
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}
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ret = imx_usbmisc_hsic_set_clk(data->usbmisc_data, true);
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if (ret) {
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dev_err(dev, "usbmisc hsic_set_clk failed, ret=%d\n", ret);
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goto hsic_set_clk_fail;
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}
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return 0;
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hsic_set_clk_fail:
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imx_usbmisc_set_wakeup(data->usbmisc_data, true);
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clk_disable:
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imx_disable_unprepare_clks(dev);
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return ret;
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@ -14,10 +14,13 @@ struct imx_usbmisc_data {
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unsigned int oc_polarity:1; /* over current polarity if oc enabled */
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unsigned int evdo:1; /* set external vbus divider option */
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unsigned int ulpi:1; /* connected to an ULPI phy */
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unsigned int hsic:1; /* HSIC controlller */
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};
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int imx_usbmisc_init(struct imx_usbmisc_data *);
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int imx_usbmisc_init_post(struct imx_usbmisc_data *);
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int imx_usbmisc_set_wakeup(struct imx_usbmisc_data *, bool);
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int imx_usbmisc_init(struct imx_usbmisc_data *data);
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int imx_usbmisc_init_post(struct imx_usbmisc_data *data);
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int imx_usbmisc_set_wakeup(struct imx_usbmisc_data *data, bool enabled);
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int imx_usbmisc_hsic_set_connect(struct imx_usbmisc_data *data);
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int imx_usbmisc_hsic_set_clk(struct imx_usbmisc_data *data, bool on);
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#endif /* __DRIVER_USB_CHIPIDEA_CI_HDRC_IMX_H */
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@ -64,10 +64,22 @@
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#define MX6_BM_OVER_CUR_DIS BIT(7)
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#define MX6_BM_OVER_CUR_POLARITY BIT(8)
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#define MX6_BM_WAKEUP_ENABLE BIT(10)
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#define MX6_BM_UTMI_ON_CLOCK BIT(13)
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#define MX6_BM_ID_WAKEUP BIT(16)
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#define MX6_BM_VBUS_WAKEUP BIT(17)
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#define MX6SX_BM_DPDM_WAKEUP_EN BIT(29)
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#define MX6_BM_WAKEUP_INTR BIT(31)
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#define MX6_USB_HSIC_CTRL_OFFSET 0x10
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/* Send resume signal without 480Mhz PHY clock */
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#define MX6SX_BM_HSIC_AUTO_RESUME BIT(23)
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/* set before portsc.suspendM = 1 */
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#define MX6_BM_HSIC_DEV_CONN BIT(21)
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/* HSIC enable */
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#define MX6_BM_HSIC_EN BIT(12)
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/* Force HSIC module 480M clock on, even when in Host is in suspend mode */
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#define MX6_BM_HSIC_CLK_ON BIT(11)
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#define MX6_USB_OTG1_PHY_CTRL 0x18
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/* For imx6dql, it is host-only controller, for later imx6, it is otg's */
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#define MX6_USB_OTG2_PHY_CTRL 0x1c
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@ -94,6 +106,10 @@ struct usbmisc_ops {
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int (*post)(struct imx_usbmisc_data *data);
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/* It's called when we need to enable/disable usb wakeup */
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int (*set_wakeup)(struct imx_usbmisc_data *data, bool enabled);
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/* It's called before setting portsc.suspendM */
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int (*hsic_set_connect)(struct imx_usbmisc_data *data);
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/* It's called during suspend/resume */
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int (*hsic_set_clk)(struct imx_usbmisc_data *data, bool enabled);
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};
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struct imx_usbmisc {
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@ -353,6 +369,18 @@ static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
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writel(reg | MX6_BM_NON_BURST_SETTING,
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usbmisc->base + data->index * 4);
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/* For HSIC controller */
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if (data->hsic) {
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reg = readl(usbmisc->base + data->index * 4);
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writel(reg | MX6_BM_UTMI_ON_CLOCK,
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usbmisc->base + data->index * 4);
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reg = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET
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+ (data->index - 2) * 4);
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reg |= MX6_BM_HSIC_EN | MX6_BM_HSIC_CLK_ON;
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writel(reg, usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET
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+ (data->index - 2) * 4);
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}
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spin_unlock_irqrestore(&usbmisc->lock, flags);
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usbmisc_imx6q_set_wakeup(data, false);
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@ -360,6 +388,79 @@ static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
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return 0;
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}
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static int usbmisc_imx6_hsic_get_reg_offset(struct imx_usbmisc_data *data)
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{
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int offset, ret = 0;
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if (data->index == 2 || data->index == 3) {
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offset = (data->index - 2) * 4;
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} else if (data->index == 0) {
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/*
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* For SoCs like i.MX7D and later, each USB controller has
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* its own non-core register region. For SoCs before i.MX7D,
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* the first two USB controllers are non-HSIC controllers.
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*/
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offset = 0;
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} else {
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dev_err(data->dev, "index is error for usbmisc\n");
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ret = -EINVAL;
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}
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return ret ? ret : offset;
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}
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static int usbmisc_imx6_hsic_set_connect(struct imx_usbmisc_data *data)
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{
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unsigned long flags;
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u32 val;
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struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
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int offset;
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spin_lock_irqsave(&usbmisc->lock, flags);
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offset = usbmisc_imx6_hsic_get_reg_offset(data);
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if (offset < 0) {
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spin_unlock_irqrestore(&usbmisc->lock, flags);
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return offset;
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}
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val = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
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if (!(val & MX6_BM_HSIC_DEV_CONN))
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writel(val | MX6_BM_HSIC_DEV_CONN,
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usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
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spin_unlock_irqrestore(&usbmisc->lock, flags);
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return 0;
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}
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static int usbmisc_imx6_hsic_set_clk(struct imx_usbmisc_data *data, bool on)
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{
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unsigned long flags;
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u32 val;
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struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
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int offset;
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spin_lock_irqsave(&usbmisc->lock, flags);
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offset = usbmisc_imx6_hsic_get_reg_offset(data);
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if (offset < 0) {
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spin_unlock_irqrestore(&usbmisc->lock, flags);
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return offset;
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}
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val = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
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val |= MX6_BM_HSIC_EN | MX6_BM_HSIC_CLK_ON;
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if (on)
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val |= MX6_BM_HSIC_CLK_ON;
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else
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val &= ~MX6_BM_HSIC_CLK_ON;
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writel(val, usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
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spin_unlock_irqrestore(&usbmisc->lock, flags);
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return 0;
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}
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static int usbmisc_imx6sx_init(struct imx_usbmisc_data *data)
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{
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void __iomem *reg = NULL;
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@ -385,6 +486,13 @@ static int usbmisc_imx6sx_init(struct imx_usbmisc_data *data)
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spin_unlock_irqrestore(&usbmisc->lock, flags);
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}
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/* For HSIC controller */
|
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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",
|
||||
|
|
|
|||
Loading…
Reference in New Issue