/* * Copyright 2012 Freescale Semiconductor, Inc. * * The code contained herein is licensed under the GNU General Public * License. You may obtain a copy of the GNU General Public License * Version 2 or later at the following locations: * * http://www.opensource.org/licenses/gpl-license.html * http://www.gnu.org/copyleft/gpl.html */ #include #include #include #include #include #include "ci_hdrc_imx.h" #define MX25_USB_PHY_CTRL_OFFSET 0x08 #define MX25_BM_EXTERNAL_VBUS_DIVIDER BIT(23) #define MX25_EHCI_INTERFACE_SINGLE_UNI (2 << 0) #define MX25_EHCI_INTERFACE_DIFF_UNI (0 << 0) #define MX25_EHCI_INTERFACE_MASK (0xf) #define MX25_OTG_SIC_SHIFT 29 #define MX25_OTG_SIC_MASK (0x3 << MX25_OTG_SIC_SHIFT) #define MX25_OTG_PM_BIT BIT(24) #define MX25_OTG_PP_BIT BIT(11) #define MX25_OTG_OCPOL_BIT BIT(3) #define MX25_H1_SIC_SHIFT 21 #define MX25_H1_SIC_MASK (0x3 << MX25_H1_SIC_SHIFT) #define MX25_H1_PP_BIT BIT(18) #define MX25_H1_PM_BIT BIT(16) #define MX25_H1_IPPUE_UP_BIT BIT(7) #define MX25_H1_IPPUE_DOWN_BIT BIT(6) #define MX25_H1_TLL_BIT BIT(5) #define MX25_H1_USBTE_BIT BIT(4) #define MX25_H1_OCPOL_BIT BIT(2) #define MX27_H1_PM_BIT BIT(8) #define MX27_H2_PM_BIT BIT(16) #define MX27_OTG_PM_BIT BIT(24) #define MX53_USB_OTG_PHY_CTRL_0_OFFSET 0x08 #define MX53_USB_OTG_PHY_CTRL_1_OFFSET 0x0c #define MX53_USB_UH2_CTRL_OFFSET 0x14 #define MX53_USB_UH3_CTRL_OFFSET 0x18 #define MX53_BM_OVER_CUR_DIS_H1 BIT(5) #define MX53_BM_OVER_CUR_DIS_OTG BIT(8) #define MX53_BM_OVER_CUR_DIS_UHx BIT(30) #define MX53_USB_PHYCTRL1_PLLDIV_MASK 0x3 #define MX53_USB_PLL_DIV_24_MHZ 0x01 #define MX6_BM_OVER_CUR_DIS BIT(7) #define MX6_BM_WAKEUP_ENABLE BIT(10) #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_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 #define MX6SX_USB_VBUS_WAKEUP_SOURCE(v) (v << 8) #define MX6SX_USB_VBUS_WAKEUP_SOURCE_VBUS MX6SX_USB_VBUS_WAKEUP_SOURCE(0) #define MX6SX_USB_VBUS_WAKEUP_SOURCE_AVALID MX6SX_USB_VBUS_WAKEUP_SOURCE(1) #define MX6SX_USB_VBUS_WAKEUP_SOURCE_BVALID MX6SX_USB_VBUS_WAKEUP_SOURCE(2) #define MX6SX_USB_VBUS_WAKEUP_SOURCE_SESS_END MX6SX_USB_VBUS_WAKEUP_SOURCE(3) #define VF610_OVER_CUR_DIS BIT(7) struct usbmisc_ops { /* It's called once when probe a usb device */ int (*init)(struct imx_usbmisc_data *data); /* It's called once after adding a usb device */ 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); }; struct imx_usbmisc { void __iomem *base; spinlock_t lock; const struct usbmisc_ops *ops; }; static int usbmisc_imx25_init(struct imx_usbmisc_data *data) { struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); unsigned long flags; u32 val = 0; if (data->index > 1) return -EINVAL; spin_lock_irqsave(&usbmisc->lock, flags); switch (data->index) { case 0: val = readl(usbmisc->base); val &= ~(MX25_OTG_SIC_MASK | MX25_OTG_PP_BIT); val |= (MX25_EHCI_INTERFACE_DIFF_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_OTG_SIC_SHIFT; val |= (MX25_OTG_PM_BIT | MX25_OTG_OCPOL_BIT); writel(val, usbmisc->base); break; case 1: val = readl(usbmisc->base); val &= ~(MX25_H1_SIC_MASK | MX25_H1_PP_BIT | MX25_H1_IPPUE_UP_BIT); val |= (MX25_EHCI_INTERFACE_SINGLE_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_H1_SIC_SHIFT; val |= (MX25_H1_PM_BIT | MX25_H1_OCPOL_BIT | MX25_H1_TLL_BIT | MX25_H1_USBTE_BIT | MX25_H1_IPPUE_DOWN_BIT); writel(val, usbmisc->base); break; } spin_unlock_irqrestore(&usbmisc->lock, flags); return 0; } static int usbmisc_imx25_post(struct imx_usbmisc_data *data) { struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); void __iomem *reg; unsigned long flags; u32 val; if (data->index > 2) return -EINVAL; if (data->evdo) { spin_lock_irqsave(&usbmisc->lock, flags); reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET; val = readl(reg); writel(val | MX25_BM_EXTERNAL_VBUS_DIVIDER, reg); spin_unlock_irqrestore(&usbmisc->lock, flags); usleep_range(5000, 10000); /* needed to stabilize voltage */ } return 0; } static int usbmisc_imx27_init(struct imx_usbmisc_data *data) { struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); unsigned long flags; u32 val; switch (data->index) { case 0: val = MX27_OTG_PM_BIT; break; case 1: val = MX27_H1_PM_BIT; break; case 2: val = MX27_H2_PM_BIT; break; default: return -EINVAL; }; spin_lock_irqsave(&usbmisc->lock, flags); if (data->disable_oc) val = readl(usbmisc->base) | val; else val = readl(usbmisc->base) & ~val; writel(val, usbmisc->base); spin_unlock_irqrestore(&usbmisc->lock, flags); return 0; } static int usbmisc_imx53_init(struct imx_usbmisc_data *data) { struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); void __iomem *reg = NULL; unsigned long flags; u32 val = 0; if (data->index > 3) return -EINVAL; /* Select a 24 MHz reference clock for the PHY */ val = readl(usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET); val &= ~MX53_USB_PHYCTRL1_PLLDIV_MASK; val |= MX53_USB_PLL_DIV_24_MHZ; writel(val, usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET); if (data->disable_oc) { spin_lock_irqsave(&usbmisc->lock, flags); switch (data->index) { case 0: reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET; val = readl(reg) | MX53_BM_OVER_CUR_DIS_OTG; break; case 1: reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET; val = readl(reg) | MX53_BM_OVER_CUR_DIS_H1; break; case 2: reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET; val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx; break; case 3: reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET; val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx; break; } if (reg && val) writel(val, reg); spin_unlock_irqrestore(&usbmisc->lock, flags); } return 0; } static int usbmisc_imx6q_set_wakeup (struct imx_usbmisc_data *data, bool enabled) { struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); unsigned long flags; u32 val; u32 wakeup_setting = (MX6_BM_WAKEUP_ENABLE | MX6_BM_VBUS_WAKEUP | MX6_BM_ID_WAKEUP); int ret = 0; if (data->index > 3) return -EINVAL; spin_lock_irqsave(&usbmisc->lock, flags); val = readl(usbmisc->base + data->index * 4); if (enabled) { val |= wakeup_setting; writel(val, usbmisc->base + data->index * 4); } else { if (val & MX6_BM_WAKEUP_INTR) pr_debug("wakeup int at ci_hdrc.%d\n", data->index); val &= ~wakeup_setting; writel(val, usbmisc->base + data->index * 4); } spin_unlock_irqrestore(&usbmisc->lock, flags); return ret; } static int usbmisc_imx6q_init(struct imx_usbmisc_data *data) { struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); unsigned long flags; u32 reg; if (data->index > 3) return -EINVAL; if (data->disable_oc) { spin_lock_irqsave(&usbmisc->lock, flags); reg = readl(usbmisc->base + data->index * 4); writel(reg | MX6_BM_OVER_CUR_DIS, usbmisc->base + data->index * 4); spin_unlock_irqrestore(&usbmisc->lock, flags); } usbmisc_imx6q_set_wakeup(data, false); return 0; } static int usbmisc_imx6sx_init(struct imx_usbmisc_data *data) { void __iomem *reg = NULL; unsigned long flags; struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); u32 val; int ret = 0; usbmisc_imx6q_init(data); if (data->index == 0 || data->index == 1) { reg = usbmisc->base + MX6_USB_OTG1_PHY_CTRL + data->index * 4; spin_lock_irqsave(&usbmisc->lock, flags); /* Set vbus wakeup source as bvalid */ val = readl(reg); writel(val | MX6SX_USB_VBUS_WAKEUP_SOURCE_BVALID, reg); /* * Disable dp/dm wakeup in device mode when vbus is * not there. */ val = readl(usbmisc->base + data->index * 4); writel(val & ~MX6SX_BM_DPDM_WAKEUP_EN, usbmisc->base + data->index * 4); spin_unlock_irqrestore(&usbmisc->lock, flags); } return ret; } static int usbmisc_vf610_init(struct imx_usbmisc_data *data) { struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); u32 reg; /* * Vybrid only has one misc register set, but in two different * areas. These is reflected in two instances of this driver. */ if (data->index >= 1) return -EINVAL; if (data->disable_oc) { reg = readl(usbmisc->base); writel(reg | VF610_OVER_CUR_DIS, usbmisc->base); } return 0; } static const struct usbmisc_ops imx25_usbmisc_ops = { .init = usbmisc_imx25_init, .post = usbmisc_imx25_post, }; static const struct usbmisc_ops imx27_usbmisc_ops = { .init = usbmisc_imx27_init, }; static const struct usbmisc_ops imx53_usbmisc_ops = { .init = usbmisc_imx53_init, }; static const struct usbmisc_ops imx6q_usbmisc_ops = { .set_wakeup = usbmisc_imx6q_set_wakeup, .init = usbmisc_imx6q_init, }; static const struct usbmisc_ops vf610_usbmisc_ops = { .init = usbmisc_vf610_init, }; static const struct usbmisc_ops imx6sx_usbmisc_ops = { .set_wakeup = usbmisc_imx6q_set_wakeup, .init = usbmisc_imx6sx_init, }; int imx_usbmisc_init(struct imx_usbmisc_data *data) { struct imx_usbmisc *usbmisc; if (!data) return 0; usbmisc = dev_get_drvdata(data->dev); if (!usbmisc->ops->init) return 0; return usbmisc->ops->init(data); } EXPORT_SYMBOL_GPL(imx_usbmisc_init); int imx_usbmisc_init_post(struct imx_usbmisc_data *data) { struct imx_usbmisc *usbmisc; if (!data) return 0; usbmisc = dev_get_drvdata(data->dev); if (!usbmisc->ops->post) return 0; return usbmisc->ops->post(data); } EXPORT_SYMBOL_GPL(imx_usbmisc_init_post); int imx_usbmisc_set_wakeup(struct imx_usbmisc_data *data, bool enabled) { struct imx_usbmisc *usbmisc; if (!data) return 0; usbmisc = dev_get_drvdata(data->dev); if (!usbmisc->ops->set_wakeup) return 0; return usbmisc->ops->set_wakeup(data, enabled); } EXPORT_SYMBOL_GPL(imx_usbmisc_set_wakeup); static const struct of_device_id usbmisc_imx_dt_ids[] = { { .compatible = "fsl,imx25-usbmisc", .data = &imx25_usbmisc_ops, }, { .compatible = "fsl,imx35-usbmisc", .data = &imx25_usbmisc_ops, }, { .compatible = "fsl,imx27-usbmisc", .data = &imx27_usbmisc_ops, }, { .compatible = "fsl,imx51-usbmisc", .data = &imx53_usbmisc_ops, }, { .compatible = "fsl,imx53-usbmisc", .data = &imx53_usbmisc_ops, }, { .compatible = "fsl,imx6q-usbmisc", .data = &imx6q_usbmisc_ops, }, { .compatible = "fsl,vf610-usbmisc", .data = &vf610_usbmisc_ops, }, { .compatible = "fsl,imx6sx-usbmisc", .data = &imx6sx_usbmisc_ops, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, usbmisc_imx_dt_ids); static int usbmisc_imx_probe(struct platform_device *pdev) { struct resource *res; struct imx_usbmisc *data; struct of_device_id *tmp_dev; data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; spin_lock_init(&data->lock); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); data->base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(data->base)) return PTR_ERR(data->base); tmp_dev = (struct of_device_id *) of_match_device(usbmisc_imx_dt_ids, &pdev->dev); data->ops = (const struct usbmisc_ops *)tmp_dev->data; platform_set_drvdata(pdev, data); return 0; } static int usbmisc_imx_remove(struct platform_device *pdev) { return 0; } static struct platform_driver usbmisc_imx_driver = { .probe = usbmisc_imx_probe, .remove = usbmisc_imx_remove, .driver = { .name = "usbmisc_imx", .of_match_table = usbmisc_imx_dt_ids, }, }; module_platform_driver(usbmisc_imx_driver); MODULE_ALIAS("platform:usbmisc-imx"); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("driver for imx usb non-core registers"); MODULE_AUTHOR("Richard Zhao ");