From a068533079a0a1be53c78c89e65adfbd3c687591 Mon Sep 17 00:00:00 2001 From: Michael Grzeschik Date: Sat, 30 Mar 2013 12:54:01 +0200 Subject: [PATCH] usb: chipidea: usbmisc: add post handling and errata fix for mx25 This adds a post handling routine which is called after ci13xxx_add_device was called. The first user is the mx25, which has to disable the external-vbus-divider after the udc has started. Signed-off-by: Michael Grzeschik Signed-off-by: Marc Kleine-Budde [Alex: also fixed a signed one-bit bitfield a whitespace error and yet another set of line-too-long and void pointer casting errors] Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman --- .../devicetree/bindings/usb/ci13xxx-imx.txt | 2 ++ drivers/usb/chipidea/ci13xxx_imx.c | 12 +++++++ drivers/usb/chipidea/ci13xxx_imx.h | 3 ++ drivers/usb/chipidea/usbmisc_imx.c | 36 +++++++++++++++++++ 4 files changed, 53 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt b/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt index 5778b9c83bd8..1c04a4c9515f 100644 --- a/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt +++ b/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt @@ -11,6 +11,7 @@ Optional properties: that indicate usb controller index - vbus-supply: regulator for vbus - disable-over-current: disable over current detect +- external-vbus-divider: enables off-chip resistor divider for Vbus Examples: usb@02184000 { /* USB OTG */ @@ -20,4 +21,5 @@ usb@02184000 { /* USB OTG */ fsl,usbphy = <&usbphy1>; fsl,usbmisc = <&usbmisc 0>; disable-over-current; + external-vbus-divider; }; diff --git a/drivers/usb/chipidea/ci13xxx_imx.c b/drivers/usb/chipidea/ci13xxx_imx.c index 8c291220be7f..8faec9dbbb84 100644 --- a/drivers/usb/chipidea/ci13xxx_imx.c +++ b/drivers/usb/chipidea/ci13xxx_imx.c @@ -79,6 +79,9 @@ int usbmisc_get_init_data(struct device *dev, struct usbmisc_usb_device *usbdev) if (of_find_property(np, "disable-over-current", NULL)) usbdev->disable_oc = 1; + if (of_find_property(np, "external-vbus-divider", NULL)) + usbdev->evdo = 1; + return 0; } EXPORT_SYMBOL_GPL(usbmisc_get_init_data); @@ -202,6 +205,15 @@ static int ci13xxx_imx_probe(struct platform_device *pdev) goto err; } + if (usbmisc_ops && usbmisc_ops->post) { + ret = usbmisc_ops->post(&pdev->dev); + if (ret) { + dev_err(&pdev->dev, + "usbmisc post failed, ret=%d\n", ret); + goto put_np; + } + } + data->ci_pdev = plat_ci; platform_set_drvdata(pdev, data); diff --git a/drivers/usb/chipidea/ci13xxx_imx.h b/drivers/usb/chipidea/ci13xxx_imx.h index 9cd2e910b1ca..550bfa457620 100644 --- a/drivers/usb/chipidea/ci13xxx_imx.h +++ b/drivers/usb/chipidea/ci13xxx_imx.h @@ -13,6 +13,8 @@ struct usbmisc_ops { /* It's called once when probe a usb device */ int (*init)(struct device *dev); + /* It's called once after adding a usb device */ + int (*post)(struct device *dev); }; struct usbmisc_usb_device { @@ -20,6 +22,7 @@ struct usbmisc_usb_device { int index; unsigned int disable_oc:1; /* over current detect disabled */ + unsigned int evdo:1; /* set external vbus divider option */ }; int usbmisc_set_ops(const struct usbmisc_ops *ops); diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c index 746013d7d391..714a6bd810ed 100644 --- a/drivers/usb/chipidea/usbmisc_imx.c +++ b/drivers/usb/chipidea/usbmisc_imx.c @@ -14,11 +14,15 @@ #include #include #include +#include #include "ci13xxx_imx.h" #define USB_DEV_MAX 4 +#define MX25_USB_PHY_CTRL_OFFSET 0x08 +#define MX25_BM_EXTERNAL_VBUS_DIVIDER BIT(23) + #define MX53_USB_OTG_PHY_CTRL_0_OFFSET 0x08 #define MX53_USB_UH2_CTRL_OFFSET 0x14 #define MX53_USB_UH3_CTRL_OFFSET 0x18 @@ -59,6 +63,30 @@ static struct usbmisc_usb_device *get_usbdev(struct device *dev) return &usbmisc->usbdev[i]; } +static int usbmisc_imx25_post(struct device *dev) +{ + struct usbmisc_usb_device *usbdev; + void __iomem *reg; + unsigned long flags; + u32 val; + + usbdev = get_usbdev(dev); + if (IS_ERR(usbdev)) + return PTR_ERR(usbdev); + + reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET; + + if (usbdev->evdo) { + spin_lock_irqsave(&usbmisc->lock, flags); + 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_imx53_init(struct device *dev) { struct usbmisc_usb_device *usbdev; @@ -120,6 +148,10 @@ static int usbmisc_imx6q_init(struct device *dev) return 0; } +static const struct usbmisc_ops imx25_usbmisc_ops = { + .post = usbmisc_imx25_post, +}; + static const struct usbmisc_ops imx53_usbmisc_ops = { .init = usbmisc_imx53_init, }; @@ -129,6 +161,10 @@ static const struct usbmisc_ops imx6q_usbmisc_ops = { }; static const struct of_device_id usbmisc_imx_dt_ids[] = { + { + .compatible = "fsl,imx25-usbmisc", + .data = &imx25_usbmisc_ops, + }, { .compatible = "fsl,imx53-usbmisc", .data = &imx53_usbmisc_ops, -- 2.20.1