// SPDX-License-Identifier: GPL-2.0+ /* * Copyright 2012 Freescale Semiconductor, Inc. * Copyright (C) 2012 Marek Vasut * on behalf of DENX Software Engineering GmbH */ #include #include #include #include #include #include #include #include #include #include #include "ci.h" #include "ci_hdrc_imx.h" struct ci_hdrc_imx_platform_flag { unsigned int flags; }; static const struct ci_hdrc_imx_platform_flag imx23_usb_data = { .flags = CI_HDRC_TURN_VBUS_EARLY_ON | CI_HDRC_DISABLE_STREAMING, }; static const struct ci_hdrc_imx_platform_flag imx27_usb_data = { .flags = CI_HDRC_DISABLE_STREAMING, }; static const struct ci_hdrc_imx_platform_flag imx28_usb_data = { .flags = CI_HDRC_IMX28_WRITE_FIX | CI_HDRC_TURN_VBUS_EARLY_ON | CI_HDRC_DISABLE_STREAMING, }; static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = { .flags = CI_HDRC_SUPPORTS_RUNTIME_PM | CI_HDRC_TURN_VBUS_EARLY_ON | CI_HDRC_DISABLE_STREAMING, }; static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = { .flags = CI_HDRC_SUPPORTS_RUNTIME_PM | CI_HDRC_TURN_VBUS_EARLY_ON | CI_HDRC_DISABLE_HOST_STREAMING, }; static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = { .flags = CI_HDRC_SUPPORTS_RUNTIME_PM | CI_HDRC_TURN_VBUS_EARLY_ON | CI_HDRC_DISABLE_HOST_STREAMING, }; static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = { .flags = CI_HDRC_SUPPORTS_RUNTIME_PM | CI_HDRC_TURN_VBUS_EARLY_ON | CI_HDRC_DISABLE_DEVICE_STREAMING, }; static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = { .flags = CI_HDRC_SUPPORTS_RUNTIME_PM, }; static const struct ci_hdrc_imx_platform_flag imx7ulp_usb_data = { .flags = CI_HDRC_SUPPORTS_RUNTIME_PM | CI_HDRC_HAS_PORTSC_PEC_MISSED | CI_HDRC_PMQOS, }; static const struct ci_hdrc_imx_platform_flag imx8ulp_usb_data = { .flags = CI_HDRC_SUPPORTS_RUNTIME_PM | CI_HDRC_HAS_PORTSC_PEC_MISSED, }; static const struct of_device_id ci_hdrc_imx_dt_ids[] = { { .compatible = "fsl,imx23-usb", .data = &imx23_usb_data}, { .compatible = "fsl,imx28-usb", .data = &imx28_usb_data}, { .compatible = "fsl,imx27-usb", .data = &imx27_usb_data}, { .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data}, { .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data}, { .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data}, { .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data}, { .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data}, { .compatible = "fsl,imx7ulp-usb", .data = &imx7ulp_usb_data}, { .compatible = "fsl,imx8ulp-usb", .data = &imx8ulp_usb_data}, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids); struct ci_hdrc_imx_data { struct usb_phy *phy; struct platform_device *ci_pdev; struct clk *clk; struct clk *clk_wakeup; struct imx_usbmisc_data *usbmisc_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; struct clk *clk_ahb; struct clk *clk_per; /* --------------------------------- */ struct pm_qos_request pm_qos_req; const struct ci_hdrc_imx_platform_flag *plat_data; }; /* Common functions shared by usbmisc drivers */ static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev) { struct platform_device *misc_pdev; struct device_node *np = dev->of_node; struct of_phandle_args args; struct imx_usbmisc_data *data; int ret; /* * In case the fsl,usbmisc property is not present this device doesn't * need usbmisc. Return NULL (which is no error here) */ if (!of_property_present(np, "fsl,usbmisc")) return NULL; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) return ERR_PTR(-ENOMEM); ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells", 0, &args); if (ret) { dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n", ret); return ERR_PTR(ret); } data->index = args.args[0]; misc_pdev = of_find_device_by_node(args.np); of_node_put(args.np); if (!misc_pdev) return ERR_PTR(-EPROBE_DEFER); if (!platform_get_drvdata(misc_pdev)) { put_device(&misc_pdev->dev); return ERR_PTR(-EPROBE_DEFER); } data->dev = &misc_pdev->dev; /* * Check the various over current related properties. If over current * detection is disabled we're not interested in the polarity. */ if (of_property_read_bool(np, "disable-over-current")) { data->disable_oc = 1; } else if (of_property_read_bool(np, "over-current-active-high")) { data->oc_pol_active_low = 0; data->oc_pol_configured = 1; } else if (of_property_read_bool(np, "over-current-active-low")) { data->oc_pol_active_low = 1; data->oc_pol_configured = 1; } else { dev_warn(dev, "No over current polarity defined\n"); } data->pwr_pol = of_property_read_bool(np, "power-active-high"); data->evdo = of_property_read_bool(np, "external-vbus-divider"); if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) data->ulpi = 1; if (of_property_read_u32(np, "samsung,picophy-pre-emp-curr-control", &data->emp_curr_control)) data->emp_curr_control = -1; if (of_property_read_u32(np, "samsung,picophy-dc-vol-level-adjust", &data->dc_vol_level_adjust)) data->dc_vol_level_adjust = -1; if (of_property_read_u32(np, "fsl,picophy-rise-fall-time-adjust", &data->rise_fall_time_adjust)) data->rise_fall_time_adjust = -1; return data; } /* End of common functions shared by usbmisc drivers*/ static int imx_get_clks(struct device *dev) { struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); int ret = 0; data->clk_ipg = devm_clk_get(dev, "ipg"); if (IS_ERR(data->clk_ipg)) { /* If the platform only needs one primary clock */ data->clk = devm_clk_get(dev, NULL); if (IS_ERR(data->clk)) { ret = PTR_ERR(data->clk); dev_err(dev, "Failed to get clks, err=%ld,%ld\n", PTR_ERR(data->clk), PTR_ERR(data->clk_ipg)); return ret; } /* Get wakeup clock. Not all of the platforms need to * handle this clock. So make it optional. */ data->clk_wakeup = devm_clk_get_optional(dev, "usb_wakeup"); if (IS_ERR(data->clk_wakeup)) ret = dev_err_probe(dev, PTR_ERR(data->clk_wakeup), "Failed to get wakeup clk\n"); return ret; } data->clk_ahb = devm_clk_get(dev, "ahb"); if (IS_ERR(data->clk_ahb)) { ret = PTR_ERR(data->clk_ahb); dev_err(dev, "Failed to get ahb clock, err=%d\n", ret); return ret; } data->clk_per = devm_clk_get(dev, "per"); if (IS_ERR(data->clk_per)) { ret = PTR_ERR(data->clk_per); dev_err(dev, "Failed to get per clock, err=%d\n", ret); return ret; } data->need_three_clks = true; return ret; } static int imx_prepare_enable_clks(struct device *dev) { struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); int ret = 0; if (data->need_three_clks) { ret = clk_prepare_enable(data->clk_ipg); if (ret) { dev_err(dev, "Failed to prepare/enable ipg clk, err=%d\n", ret); return ret; } ret = clk_prepare_enable(data->clk_ahb); if (ret) { dev_err(dev, "Failed to prepare/enable ahb clk, err=%d\n", ret); clk_disable_unprepare(data->clk_ipg); return ret; } ret = clk_prepare_enable(data->clk_per); if (ret) { dev_err(dev, "Failed to prepare/enable per clk, err=%d\n", ret); clk_disable_unprepare(data->clk_ahb); clk_disable_unprepare(data->clk_ipg); return ret; } } else { ret = clk_prepare_enable(data->clk); if (ret) { dev_err(dev, "Failed to prepare/enable clk, err=%d\n", ret); return ret; } } return ret; } static void imx_disable_unprepare_clks(struct device *dev) { struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); if (data->need_three_clks) { clk_disable_unprepare(data->clk_per); clk_disable_unprepare(data->clk_ahb); clk_disable_unprepare(data->clk_ipg); } else { clk_disable_unprepare(data->clk); } } 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; struct imx_usbmisc_data *mdata = data->usbmisc_data; switch (event) { case CI_HDRC_IMX_HSIC_ACTIVE_EVENT: if (data->pinctrl) { 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(mdata); if (ret) dev_err(dev, "hsic_set_connect failed, err=%d\n", ret); break; case CI_HDRC_CONTROLLER_VBUS_EVENT: if (ci->vbus_active) ret = imx_usbmisc_charger_detection(mdata, true); else ret = imx_usbmisc_charger_detection(mdata, false); if (ci->usb_phy) schedule_work(&ci->usb_phy->chg_work); 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, .flags = CI_HDRC_HAS_SHORT_PKT_LIMIT, .notify_event = ci_hdrc_imx_notify_event, }; int ret; const struct ci_hdrc_imx_platform_flag *imx_platform_flag; struct device_node *np = pdev->dev.of_node; struct device *dev = &pdev->dev; imx_platform_flag = of_device_get_match_data(&pdev->dev); data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; data->plat_data = imx_platform_flag; pdata.flags |= imx_platform_flag->flags; platform_set_drvdata(pdev, data); data->usbmisc_data = usbmisc_get_init_data(dev); if (IS_ERR(data->usbmisc_data)) return PTR_ERR(data->usbmisc_data); if ((of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC) && data->usbmisc_data) { pdata.flags |= CI_HDRC_IMX_IS_HSIC; data->usbmisc_data->hsic = 1; data->pinctrl = devm_pinctrl_get(dev); if (PTR_ERR(data->pinctrl) == -ENODEV) data->pinctrl = NULL; else if (IS_ERR(data->pinctrl)) return dev_err_probe(dev, PTR_ERR(data->pinctrl), "pinctrl get failed\n"); data->hsic_pad_regulator = devm_regulator_get_optional(dev, "hsic"); if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) { /* no pad regulator is needed */ data->hsic_pad_regulator = NULL; } else if (IS_ERR(data->hsic_pad_regulator)) return dev_err_probe(dev, PTR_ERR(data->hsic_pad_regulator), "Get HSIC pad regulator error\n"); 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; } } } /* HSIC pinctrl handling */ if (data->pinctrl) { struct pinctrl_state *pinctrl_hsic_idle; 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); } } if (pdata.flags & CI_HDRC_PMQOS) cpu_latency_qos_add_request(&data->pm_qos_req, 0); ret = imx_get_clks(dev); if (ret) goto disable_hsic_regulator; ret = imx_prepare_enable_clks(dev); if (ret) goto disable_hsic_regulator; ret = clk_prepare_enable(data->clk_wakeup); if (ret) goto err_wakeup_clk; data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0); if (IS_ERR(data->phy)) { ret = PTR_ERR(data->phy); if (ret != -ENODEV) { dev_err_probe(dev, ret, "Failed to parse fsl,usbphy\n"); goto err_clk; } data->phy = devm_usb_get_phy_by_phandle(dev, "phys", 0); if (IS_ERR(data->phy)) { ret = PTR_ERR(data->phy); if (ret == -ENODEV) { data->phy = NULL; } else { dev_err_probe(dev, ret, "Failed to parse phys\n"); goto err_clk; } } } pdata.usb_phy = data->phy; if (data->usbmisc_data) data->usbmisc_data->usb_phy = data->phy; if ((of_device_is_compatible(np, "fsl,imx53-usb") || of_device_is_compatible(np, "fsl,imx51-usb")) && pdata.usb_phy && of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) { pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL; data->override_phy_control = true; usb_phy_init(pdata.usb_phy); } if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM) data->supports_runtime_pm = true; ret = imx_usbmisc_init(data->usbmisc_data); if (ret) { dev_err(dev, "usbmisc init failed, ret=%d\n", ret); goto err_clk; } 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); dev_err_probe(dev, ret, "ci_hdrc_add_device failed\n"); goto err_clk; } if (data->usbmisc_data) { if (!IS_ERR(pdata.id_extcon.edev) || of_property_read_bool(np, "usb-role-switch")) data->usbmisc_data->ext_id = 1; if (!IS_ERR(pdata.vbus_extcon.edev) || of_property_read_bool(np, "usb-role-switch")) data->usbmisc_data->ext_vbus = 1; /* usbmisc needs to know dr mode to choose wakeup setting */ data->usbmisc_data->available_role = ci_hdrc_query_available_role(data->ci_pdev); } ret = imx_usbmisc_init_post(data->usbmisc_data); if (ret) { dev_err(dev, "usbmisc post failed, ret=%d\n", ret); goto disable_device; } if (data->supports_runtime_pm) { pm_runtime_set_active(dev); pm_runtime_enable(dev); } device_set_wakeup_capable(dev, true); return 0; disable_device: ci_hdrc_remove_device(data->ci_pdev); err_clk: clk_disable_unprepare(data->clk_wakeup); err_wakeup_clk: imx_disable_unprepare_clks(dev); disable_hsic_regulator: if (data->hsic_pad_regulator) /* don't overwrite original ret (cf. EPROBE_DEFER) */ regulator_disable(data->hsic_pad_regulator); if (pdata.flags & CI_HDRC_PMQOS) cpu_latency_qos_remove_request(&data->pm_qos_req); data->ci_pdev = NULL; return ret; } static void ci_hdrc_imx_remove(struct platform_device *pdev) { struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev); if (data->supports_runtime_pm) { pm_runtime_get_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); pm_runtime_put_noidle(&pdev->dev); } if (data->ci_pdev) ci_hdrc_remove_device(data->ci_pdev); if (data->override_phy_control) usb_phy_shutdown(data->phy); if (data->ci_pdev) { imx_disable_unprepare_clks(&pdev->dev); clk_disable_unprepare(data->clk_wakeup); if (data->plat_data->flags & CI_HDRC_PMQOS) cpu_latency_qos_remove_request(&data->pm_qos_req); if (data->hsic_pad_regulator) regulator_disable(data->hsic_pad_regulator); } } static void ci_hdrc_imx_shutdown(struct platform_device *pdev) { ci_hdrc_imx_remove(pdev); } static int imx_controller_suspend(struct device *dev, pm_message_t msg) { struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); int ret = 0; dev_dbg(dev, "at %s\n", __func__); ret = imx_usbmisc_suspend(data->usbmisc_data, PMSG_IS_AUTO(msg) || device_may_wakeup(dev)); if (ret) { dev_err(dev, "usbmisc suspend failed, ret=%d\n", ret); return ret; } imx_disable_unprepare_clks(dev); if (data->plat_data->flags & CI_HDRC_PMQOS) cpu_latency_qos_remove_request(&data->pm_qos_req); data->in_lpm = true; return 0; } static int imx_controller_resume(struct device *dev, pm_message_t msg) { struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); int ret = 0; dev_dbg(dev, "at %s\n", __func__); if (!data->in_lpm) { WARN_ON(1); return 0; } if (data->plat_data->flags & CI_HDRC_PMQOS) cpu_latency_qos_add_request(&data->pm_qos_req, 0); ret = imx_prepare_enable_clks(dev); if (ret) return ret; data->in_lpm = false; ret = imx_usbmisc_resume(data->usbmisc_data, PMSG_IS_AUTO(msg) || device_may_wakeup(dev)); if (ret) { dev_err(dev, "usbmisc resume failed, ret=%d\n", ret); goto clk_disable; } return 0; clk_disable: imx_disable_unprepare_clks(dev); return ret; } static int ci_hdrc_imx_suspend(struct device *dev) { int ret; struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); if (data->in_lpm) /* The core's suspend doesn't run */ return 0; ret = imx_controller_suspend(dev, PMSG_SUSPEND); if (ret) return ret; pinctrl_pm_select_sleep_state(dev); return ret; } static int ci_hdrc_imx_resume(struct device *dev) { struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); int ret; pinctrl_pm_select_default_state(dev); ret = imx_controller_resume(dev, PMSG_RESUME); if (!ret && data->supports_runtime_pm) { pm_runtime_disable(dev); pm_runtime_set_active(dev); pm_runtime_enable(dev); } return ret; } static int ci_hdrc_imx_runtime_suspend(struct device *dev) { struct ci_hdrc_imx_data *data = dev_get_drvdata(dev); if (data->in_lpm) { WARN_ON(1); return 0; } return imx_controller_suspend(dev, PMSG_AUTO_SUSPEND); } static int ci_hdrc_imx_runtime_resume(struct device *dev) { return imx_controller_resume(dev, PMSG_AUTO_RESUME); } static const struct dev_pm_ops ci_hdrc_imx_pm_ops = { SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume) RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend, ci_hdrc_imx_runtime_resume, NULL) }; static struct platform_driver ci_hdrc_imx_driver = { .probe = ci_hdrc_imx_probe, .remove = ci_hdrc_imx_remove, .shutdown = ci_hdrc_imx_shutdown, .driver = { .name = "imx_usb", .of_match_table = ci_hdrc_imx_dt_ids, .pm = pm_ptr(&ci_hdrc_imx_pm_ops), }, }; module_platform_driver(ci_hdrc_imx_driver); MODULE_ALIAS("platform:imx-usb"); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("CI HDRC i.MX USB binding"); MODULE_AUTHOR("Marek Vasut "); MODULE_AUTHOR("Richard Zhao ");