![LABBE Corentin](/assets/img/avatar_default.png)
of_match_device could return NULL, and so cause a NULL pointer dereference later. Renaming tmp_dev to of_id (like all others do) in the process. Reported-by: coverity (CID 1324135) Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com> Signed-off-by: Peter Chen <peter.chen@freescale.com>
546 lines
14 KiB
C
546 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_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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if (data->disable_oc) {
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reg = readl(usbmisc->base + data->index * 4);
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writel(reg | MX6_BM_OVER_CUR_DIS,
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usbmisc->base + data->index * 4);
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}
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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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if (data->disable_oc) {
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reg = readl(usbmisc->base);
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writel(reg | MX6_BM_OVER_CUR_DIS, usbmisc->base);
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}
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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;
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return usbmisc->ops->post(data);
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}
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EXPORT_SYMBOL_GPL(imx_usbmisc_init_post);
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int imx_usbmisc_set_wakeup(struct imx_usbmisc_data *data, bool enabled)
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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);
|
|
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,
|
|
},
|
|
{ /* 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>");
|