From: Stefan Agner Date: Mon, 22 Sep 2014 00:14:15 +0000 (+0800) Subject: chipidea: usbmisc_imx: Add USB support for VF610 SoCs X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f40017e0f3325b4c42139f54748ac4f0bbed3c52;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git chipidea: usbmisc_imx: Add USB support for VF610 SoCs This adds Vybrid VF610 SoC support. The IP is very similar to i.MX6, however, the non-core registers are spread in two different register areas. Hence we support multiple instances of the USB misc driver and add the driver instance to the imx_usbmisc_data structure. Signed-off-by: Peter Chen Signed-off-by: Stefan Agner Signed-off-by: Greg Kroah-Hartman --- diff --git a/Documentation/devicetree/bindings/usb/usbmisc-imx.txt b/Documentation/devicetree/bindings/usb/usbmisc-imx.txt index 97ce94e1a6cc..c101a4b17131 100644 --- a/Documentation/devicetree/bindings/usb/usbmisc-imx.txt +++ b/Documentation/devicetree/bindings/usb/usbmisc-imx.txt @@ -4,6 +4,7 @@ Required properties: - #index-cells: Cells used to descibe usb controller index. Should be <1> - compatible: Should be one of below: "fsl,imx6q-usbmisc" for imx6q + "fsl,vf610-usbmisc" for Vybrid vf610 - reg: Should contain registers location and length Examples: diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c index 65444b02bd68..a7ab0f15926e 100644 --- a/drivers/usb/chipidea/ci_hdrc_imx.c +++ b/drivers/usb/chipidea/ci_hdrc_imx.c @@ -54,6 +54,7 @@ struct ci_hdrc_imx_data { 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; @@ -79,8 +80,15 @@ static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev) } 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); + + data->dev = &misc_pdev->dev; + if (of_find_property(np, "disable-over-current", NULL)) data->disable_oc = 1; diff --git a/drivers/usb/chipidea/ci_hdrc_imx.h b/drivers/usb/chipidea/ci_hdrc_imx.h index 996ec93467b2..4ed828f75a1e 100644 --- a/drivers/usb/chipidea/ci_hdrc_imx.h +++ b/drivers/usb/chipidea/ci_hdrc_imx.h @@ -13,6 +13,7 @@ #define __DRIVER_USB_CHIPIDEA_CI_HDRC_IMX_H struct imx_usbmisc_data { + struct device *dev; int index; unsigned int disable_oc:1; /* over current detect disabled */ diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c index 85293b8b1df9..926c997ef310 100644 --- a/drivers/usb/chipidea/usbmisc_imx.c +++ b/drivers/usb/chipidea/usbmisc_imx.c @@ -57,6 +57,8 @@ #define MX6_BM_OVER_CUR_DIS BIT(7) +#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); @@ -71,10 +73,9 @@ struct imx_usbmisc { const struct usbmisc_ops *ops; }; -static struct imx_usbmisc *usbmisc; - 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; @@ -108,6 +109,7 @@ static int usbmisc_imx25_init(struct imx_usbmisc_data *data) 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; @@ -130,6 +132,7 @@ static int usbmisc_imx25_post(struct imx_usbmisc_data *data) static int usbmisc_imx27_init(struct imx_usbmisc_data *data) { + struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); unsigned long flags; u32 val; @@ -160,6 +163,7 @@ static int usbmisc_imx27_init(struct imx_usbmisc_data *data) 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; @@ -204,6 +208,7 @@ static int usbmisc_imx53_init(struct imx_usbmisc_data *data) static int usbmisc_imx6q_init(struct imx_usbmisc_data *data) { + struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); unsigned long flags; u32 reg; @@ -221,6 +226,26 @@ static int usbmisc_imx6q_init(struct imx_usbmisc_data *data) return 0; } +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, @@ -238,10 +263,14 @@ static const struct usbmisc_ops imx6q_usbmisc_ops = { .init = usbmisc_imx6q_init, }; +static const struct usbmisc_ops vf610_usbmisc_ops = { + .init = usbmisc_vf610_init, +}; + int imx_usbmisc_init(struct imx_usbmisc_data *data) { - if (!usbmisc) - return -EPROBE_DEFER; + struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); + if (!usbmisc->ops->init) return 0; return usbmisc->ops->init(data); @@ -250,8 +279,8 @@ EXPORT_SYMBOL_GPL(imx_usbmisc_init); int imx_usbmisc_init_post(struct imx_usbmisc_data *data) { - if (!usbmisc) - return -EPROBE_DEFER; + struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); + if (!usbmisc->ops->post) return 0; return usbmisc->ops->post(data); @@ -283,6 +312,10 @@ static const struct of_device_id usbmisc_imx_dt_ids[] = { .compatible = "fsl,imx6q-usbmisc", .data = &imx6q_usbmisc_ops, }, + { + .compatible = "fsl,vf610-usbmisc", + .data = &vf610_usbmisc_ops, + }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, usbmisc_imx_dt_ids); @@ -294,9 +327,6 @@ static int usbmisc_imx_probe(struct platform_device *pdev) int ret; struct of_device_id *tmp_dev; - if (usbmisc) - return -EBUSY; - data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; @@ -325,15 +355,15 @@ static int usbmisc_imx_probe(struct platform_device *pdev) tmp_dev = (struct of_device_id *) of_match_device(usbmisc_imx_dt_ids, &pdev->dev); data->ops = (const struct usbmisc_ops *)tmp_dev->data; - usbmisc = data; + platform_set_drvdata(pdev, data); return 0; } static int usbmisc_imx_remove(struct platform_device *pdev) { + struct imx_usbmisc *usbmisc = dev_get_drvdata(&pdev->dev); clk_disable_unprepare(usbmisc->clk); - usbmisc = NULL; return 0; }