![Li Jun](/assets/img/avatar_default.png)
imx usb over current polarity is low active by default, with over-current-active-high property added, user can config it to be high active. Meanwhile keep this setting unchanged for existing platforms so new platform must set the right value for active low by its usbmisc init function if over current is enabled. Signed-off-by: Li Jun <jun.li@nxp.com> Signed-off-by: Peter Chen <peter.chen@nxp.com>
558 lines
14 KiB
C
558 lines
14 KiB
C
/*
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* Copyright 2012 Freescale Semiconductor, Inc.
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/delay.h>
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#include "ci_hdrc_imx.h"
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#define MX25_USB_PHY_CTRL_OFFSET 0x08
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#define MX25_BM_EXTERNAL_VBUS_DIVIDER BIT(23)
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#define MX25_EHCI_INTERFACE_SINGLE_UNI (2 << 0)
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#define MX25_EHCI_INTERFACE_DIFF_UNI (0 << 0)
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#define MX25_EHCI_INTERFACE_MASK (0xf)
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#define MX25_OTG_SIC_SHIFT 29
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#define MX25_OTG_SIC_MASK (0x3 << MX25_OTG_SIC_SHIFT)
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#define MX25_OTG_PM_BIT BIT(24)
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#define MX25_OTG_PP_BIT BIT(11)
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#define MX25_OTG_OCPOL_BIT BIT(3)
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#define MX25_H1_SIC_SHIFT 21
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#define MX25_H1_SIC_MASK (0x3 << MX25_H1_SIC_SHIFT)
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#define MX25_H1_PP_BIT BIT(18)
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#define MX25_H1_PM_BIT BIT(16)
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#define MX25_H1_IPPUE_UP_BIT BIT(7)
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#define MX25_H1_IPPUE_DOWN_BIT BIT(6)
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#define MX25_H1_TLL_BIT BIT(5)
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#define MX25_H1_USBTE_BIT BIT(4)
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#define MX25_H1_OCPOL_BIT BIT(2)
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#define MX27_H1_PM_BIT BIT(8)
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#define MX27_H2_PM_BIT BIT(16)
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#define MX27_OTG_PM_BIT BIT(24)
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#define MX53_USB_OTG_PHY_CTRL_0_OFFSET 0x08
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#define MX53_USB_OTG_PHY_CTRL_1_OFFSET 0x0c
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#define MX53_USB_UH2_CTRL_OFFSET 0x14
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#define MX53_USB_UH3_CTRL_OFFSET 0x18
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#define MX53_BM_OVER_CUR_DIS_H1 BIT(5)
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#define MX53_BM_OVER_CUR_DIS_OTG BIT(8)
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#define MX53_BM_OVER_CUR_DIS_UHx BIT(30)
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#define MX53_USB_PHYCTRL1_PLLDIV_MASK 0x3
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#define MX53_USB_PLL_DIV_24_MHZ 0x01
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#define MX6_BM_NON_BURST_SETTING BIT(1)
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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_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_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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#define MX6SX_USB_VBUS_WAKEUP_SOURCE(v) (v << 8)
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#define MX6SX_USB_VBUS_WAKEUP_SOURCE_VBUS MX6SX_USB_VBUS_WAKEUP_SOURCE(0)
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#define MX6SX_USB_VBUS_WAKEUP_SOURCE_AVALID MX6SX_USB_VBUS_WAKEUP_SOURCE(1)
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#define MX6SX_USB_VBUS_WAKEUP_SOURCE_BVALID MX6SX_USB_VBUS_WAKEUP_SOURCE(2)
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#define MX6SX_USB_VBUS_WAKEUP_SOURCE_SESS_END MX6SX_USB_VBUS_WAKEUP_SOURCE(3)
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#define VF610_OVER_CUR_DIS BIT(7)
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#define MX7D_USBNC_USB_CTRL2 0x4
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#define MX7D_USB_VBUS_WAKEUP_SOURCE_MASK 0x3
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#define MX7D_USB_VBUS_WAKEUP_SOURCE(v) (v << 0)
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#define MX7D_USB_VBUS_WAKEUP_SOURCE_VBUS MX7D_USB_VBUS_WAKEUP_SOURCE(0)
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#define MX7D_USB_VBUS_WAKEUP_SOURCE_AVALID MX7D_USB_VBUS_WAKEUP_SOURCE(1)
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#define MX7D_USB_VBUS_WAKEUP_SOURCE_BVALID MX7D_USB_VBUS_WAKEUP_SOURCE(2)
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#define MX7D_USB_VBUS_WAKEUP_SOURCE_SESS_END MX7D_USB_VBUS_WAKEUP_SOURCE(3)
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struct usbmisc_ops {
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/* It's called once when probe a usb device */
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int (*init)(struct imx_usbmisc_data *data);
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/* It's called once after adding a usb device */
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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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};
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struct imx_usbmisc {
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void __iomem *base;
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spinlock_t lock;
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const struct usbmisc_ops *ops;
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};
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static int usbmisc_imx25_init(struct imx_usbmisc_data *data)
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{
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struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
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unsigned long flags;
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u32 val = 0;
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if (data->index > 1)
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return -EINVAL;
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spin_lock_irqsave(&usbmisc->lock, flags);
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switch (data->index) {
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case 0:
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val = readl(usbmisc->base);
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val &= ~(MX25_OTG_SIC_MASK | MX25_OTG_PP_BIT);
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val |= (MX25_EHCI_INTERFACE_DIFF_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_OTG_SIC_SHIFT;
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val |= (MX25_OTG_PM_BIT | MX25_OTG_OCPOL_BIT);
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writel(val, usbmisc->base);
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break;
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case 1:
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val = readl(usbmisc->base);
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val &= ~(MX25_H1_SIC_MASK | MX25_H1_PP_BIT | MX25_H1_IPPUE_UP_BIT);
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val |= (MX25_EHCI_INTERFACE_SINGLE_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_H1_SIC_SHIFT;
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val |= (MX25_H1_PM_BIT | MX25_H1_OCPOL_BIT | MX25_H1_TLL_BIT |
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MX25_H1_USBTE_BIT | MX25_H1_IPPUE_DOWN_BIT);
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writel(val, usbmisc->base);
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break;
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}
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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_imx25_post(struct imx_usbmisc_data *data)
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{
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struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
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void __iomem *reg;
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unsigned long flags;
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u32 val;
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if (data->index > 2)
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return -EINVAL;
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if (data->evdo) {
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spin_lock_irqsave(&usbmisc->lock, flags);
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reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET;
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val = readl(reg);
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writel(val | MX25_BM_EXTERNAL_VBUS_DIVIDER, reg);
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spin_unlock_irqrestore(&usbmisc->lock, flags);
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usleep_range(5000, 10000); /* needed to stabilize voltage */
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}
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return 0;
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}
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static int usbmisc_imx27_init(struct imx_usbmisc_data *data)
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{
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struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
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unsigned long flags;
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u32 val;
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switch (data->index) {
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case 0:
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val = MX27_OTG_PM_BIT;
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break;
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case 1:
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val = MX27_H1_PM_BIT;
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break;
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case 2:
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val = MX27_H2_PM_BIT;
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break;
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default:
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return -EINVAL;
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}
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spin_lock_irqsave(&usbmisc->lock, flags);
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if (data->disable_oc)
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val = readl(usbmisc->base) | val;
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else
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val = readl(usbmisc->base) & ~val;
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writel(val, usbmisc->base);
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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_imx53_init(struct imx_usbmisc_data *data)
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{
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struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
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void __iomem *reg = NULL;
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unsigned long flags;
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u32 val = 0;
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if (data->index > 3)
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return -EINVAL;
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/* Select a 24 MHz reference clock for the PHY */
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val = readl(usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET);
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val &= ~MX53_USB_PHYCTRL1_PLLDIV_MASK;
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val |= MX53_USB_PLL_DIV_24_MHZ;
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writel(val, usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET);
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if (data->disable_oc) {
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spin_lock_irqsave(&usbmisc->lock, flags);
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switch (data->index) {
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case 0:
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reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
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val = readl(reg) | MX53_BM_OVER_CUR_DIS_OTG;
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break;
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case 1:
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reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
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val = readl(reg) | MX53_BM_OVER_CUR_DIS_H1;
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break;
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case 2:
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reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET;
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val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
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break;
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case 3:
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reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET;
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val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
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break;
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}
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if (reg && val)
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writel(val, reg);
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spin_unlock_irqrestore(&usbmisc->lock, flags);
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}
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return 0;
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}
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static int usbmisc_imx6q_set_wakeup
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(struct imx_usbmisc_data *data, bool enabled)
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{
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struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
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unsigned long flags;
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u32 val;
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u32 wakeup_setting = (MX6_BM_WAKEUP_ENABLE |
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MX6_BM_VBUS_WAKEUP | MX6_BM_ID_WAKEUP);
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int ret = 0;
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if (data->index > 3)
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return -EINVAL;
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spin_lock_irqsave(&usbmisc->lock, flags);
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val = readl(usbmisc->base + data->index * 4);
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if (enabled) {
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val |= wakeup_setting;
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writel(val, usbmisc->base + data->index * 4);
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} else {
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if (val & MX6_BM_WAKEUP_INTR)
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pr_debug("wakeup int at ci_hdrc.%d\n", data->index);
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val &= ~wakeup_setting;
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writel(val, usbmisc->base + data->index * 4);
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}
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spin_unlock_irqrestore(&usbmisc->lock, flags);
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return ret;
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}
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static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
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{
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struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
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unsigned long flags;
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u32 reg;
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if (data->index > 3)
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return -EINVAL;
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spin_lock_irqsave(&usbmisc->lock, flags);
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reg = readl(usbmisc->base + data->index * 4);
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if (data->disable_oc) {
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reg |= MX6_BM_OVER_CUR_DIS;
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} else if (data->oc_polarity == 1) {
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/* High active */
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reg &= ~(MX6_BM_OVER_CUR_DIS | MX6_BM_OVER_CUR_POLARITY);
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}
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writel(reg, usbmisc->base + data->index * 4);
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/* SoC non-burst setting */
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reg = readl(usbmisc->base + data->index * 4);
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writel(reg | MX6_BM_NON_BURST_SETTING,
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usbmisc->base + data->index * 4);
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spin_unlock_irqrestore(&usbmisc->lock, flags);
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usbmisc_imx6q_set_wakeup(data, false);
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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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unsigned long flags;
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struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
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u32 val;
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usbmisc_imx6q_init(data);
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if (data->index == 0 || data->index == 1) {
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reg = usbmisc->base + MX6_USB_OTG1_PHY_CTRL + data->index * 4;
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spin_lock_irqsave(&usbmisc->lock, flags);
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/* Set vbus wakeup source as bvalid */
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val = readl(reg);
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writel(val | MX6SX_USB_VBUS_WAKEUP_SOURCE_BVALID, reg);
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/*
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* Disable dp/dm wakeup in device mode when vbus is
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* not there.
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*/
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val = readl(usbmisc->base + data->index * 4);
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writel(val & ~MX6SX_BM_DPDM_WAKEUP_EN,
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usbmisc->base + data->index * 4);
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spin_unlock_irqrestore(&usbmisc->lock, flags);
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}
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return 0;
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}
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static int usbmisc_vf610_init(struct imx_usbmisc_data *data)
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{
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struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
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u32 reg;
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/*
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* Vybrid only has one misc register set, but in two different
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* areas. These is reflected in two instances of this driver.
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*/
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if (data->index >= 1)
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return -EINVAL;
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if (data->disable_oc) {
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reg = readl(usbmisc->base);
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writel(reg | VF610_OVER_CUR_DIS, usbmisc->base);
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}
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return 0;
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}
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static int usbmisc_imx7d_set_wakeup
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(struct imx_usbmisc_data *data, bool enabled)
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{
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struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
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unsigned long flags;
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u32 val;
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u32 wakeup_setting = (MX6_BM_WAKEUP_ENABLE |
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MX6_BM_VBUS_WAKEUP | MX6_BM_ID_WAKEUP);
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spin_lock_irqsave(&usbmisc->lock, flags);
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val = readl(usbmisc->base);
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if (enabled) {
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writel(val | wakeup_setting, usbmisc->base);
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} else {
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if (val & MX6_BM_WAKEUP_INTR)
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dev_dbg(data->dev, "wakeup int\n");
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writel(val & ~wakeup_setting, usbmisc->base);
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}
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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_imx7d_init(struct imx_usbmisc_data *data)
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{
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struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
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unsigned long flags;
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u32 reg;
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if (data->index >= 1)
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return -EINVAL;
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spin_lock_irqsave(&usbmisc->lock, flags);
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reg = readl(usbmisc->base);
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if (data->disable_oc) {
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reg |= MX6_BM_OVER_CUR_DIS;
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} else if (data->oc_polarity == 1) {
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/* High active */
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reg &= ~(MX6_BM_OVER_CUR_DIS | MX6_BM_OVER_CUR_POLARITY);
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}
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writel(reg, usbmisc->base);
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reg = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
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reg &= ~MX7D_USB_VBUS_WAKEUP_SOURCE_MASK;
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writel(reg | MX7D_USB_VBUS_WAKEUP_SOURCE_BVALID,
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usbmisc->base + MX7D_USBNC_USB_CTRL2);
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spin_unlock_irqrestore(&usbmisc->lock, flags);
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usbmisc_imx7d_set_wakeup(data, false);
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return 0;
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}
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static const struct usbmisc_ops imx25_usbmisc_ops = {
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.init = usbmisc_imx25_init,
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.post = usbmisc_imx25_post,
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};
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static const struct usbmisc_ops imx27_usbmisc_ops = {
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.init = usbmisc_imx27_init,
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};
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static const struct usbmisc_ops imx53_usbmisc_ops = {
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.init = usbmisc_imx53_init,
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};
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static const struct usbmisc_ops imx6q_usbmisc_ops = {
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.set_wakeup = usbmisc_imx6q_set_wakeup,
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.init = usbmisc_imx6q_init,
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};
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static const struct usbmisc_ops vf610_usbmisc_ops = {
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.init = usbmisc_vf610_init,
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};
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static const struct usbmisc_ops imx6sx_usbmisc_ops = {
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.set_wakeup = usbmisc_imx6q_set_wakeup,
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.init = usbmisc_imx6sx_init,
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};
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static const struct usbmisc_ops imx7d_usbmisc_ops = {
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.init = usbmisc_imx7d_init,
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.set_wakeup = usbmisc_imx7d_set_wakeup,
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};
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int imx_usbmisc_init(struct imx_usbmisc_data *data)
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{
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struct imx_usbmisc *usbmisc;
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if (!data)
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return 0;
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usbmisc = dev_get_drvdata(data->dev);
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if (!usbmisc->ops->init)
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return 0;
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return usbmisc->ops->init(data);
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}
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EXPORT_SYMBOL_GPL(imx_usbmisc_init);
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int imx_usbmisc_init_post(struct imx_usbmisc_data *data)
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{
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struct imx_usbmisc *usbmisc;
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if (!data)
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return 0;
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usbmisc = dev_get_drvdata(data->dev);
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if (!usbmisc->ops->post)
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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,
|
|
},
|
|
{
|
|
.compatible = "fsl,imx6ul-usbmisc",
|
|
.data = &imx6sx_usbmisc_ops,
|
|
},
|
|
{
|
|
.compatible = "fsl,imx7d-usbmisc",
|
|
.data = &imx7d_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;
|
|
const struct of_device_id *of_id;
|
|
|
|
of_id = of_match_device(usbmisc_imx_dt_ids, &pdev->dev);
|
|
if (!of_id)
|
|
return -ENODEV;
|
|
|
|
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);
|
|
|
|
data->ops = (const struct usbmisc_ops *)of_id->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 <richard.zhao@freescale.com>");
|