From d142d6be231713330f9c0d7ee52f23e1b3f19ee4 Mon Sep 17 00:00:00 2001 From: Richard Zhao Date: Wed, 12 Sep 2012 14:58:05 +0300 Subject: USB: chipidea: add imx usbmisc support i.MX usb controllers share non-core registers, which may include SoC specific controls. We turn it into a usbmisc device and usbmisc driver set operations needed by ci13xxx_imx driver. For example, Sabrelite board has bad over-current design, we can usbmisc to disable over-current detection. Acked-by: Sascha Hauer Signed-off-by: Richard Zhao Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman --- drivers/usb/chipidea/ci13xxx_imx.c | 64 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) (limited to 'drivers/usb/chipidea/ci13xxx_imx.c') diff --git a/drivers/usb/chipidea/ci13xxx_imx.c b/drivers/usb/chipidea/ci13xxx_imx.c index ef60d06835d0..96ac67bbd2db 100644 --- a/drivers/usb/chipidea/ci13xxx_imx.c +++ b/drivers/usb/chipidea/ci13xxx_imx.c @@ -22,6 +22,7 @@ #include #include "ci.h" +#include "ci13xxx_imx.h" #define pdev_to_phy(pdev) \ ((struct usb_phy *)platform_get_drvdata(pdev)) @@ -34,6 +35,55 @@ struct ci13xxx_imx_data { struct regulator *reg_vbus; }; +static const struct usbmisc_ops *usbmisc_ops; + +/* Common functions shared by usbmisc drivers */ + +int usbmisc_set_ops(const struct usbmisc_ops *ops) +{ + if (usbmisc_ops) + return -EBUSY; + + usbmisc_ops = ops; + + return 0; +} +EXPORT_SYMBOL_GPL(usbmisc_set_ops); + +void usbmisc_unset_ops(const struct usbmisc_ops *ops) +{ + usbmisc_ops = NULL; +} +EXPORT_SYMBOL_GPL(usbmisc_unset_ops); + +int usbmisc_get_init_data(struct device *dev, struct usbmisc_usb_device *usbdev) +{ + struct device_node *np = dev->of_node; + struct of_phandle_args args; + int ret; + + usbdev->dev = dev; + + ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells", + 0, &args); + if (ret) { + dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n", + ret); + memset(usbdev, 0, sizeof(*usbdev)); + return ret; + } + usbdev->index = args.args[0]; + of_node_put(args.np); + + if (of_find_property(np, "disable-over-current", NULL)) + usbdev->disable_oc = 1; + + return 0; +} +EXPORT_SYMBOL_GPL(usbmisc_get_init_data); + +/* End of common functions shared by usbmisc drivers*/ + static struct ci13xxx_platform_data ci13xxx_imx_platdata __devinitdata = { .name = "ci13xxx_imx", .flags = CI13XXX_REQUIRE_TRANSCEIVER | @@ -51,6 +101,10 @@ static int __devinit ci13xxx_imx_probe(struct platform_device *pdev) struct regulator *reg_vbus; int ret; + if (of_find_property(pdev->dev.of_node, "fsl,usbmisc", NULL) + && !usbmisc_ops) + return -EPROBE_DEFER; + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (!data) { dev_err(&pdev->dev, "Failed to allocate CI13xxx-IMX data!\n"); @@ -120,6 +174,16 @@ static int __devinit ci13xxx_imx_probe(struct platform_device *pdev) *pdev->dev.dma_mask = DMA_BIT_MASK(32); dma_set_coherent_mask(&pdev->dev, *pdev->dev.dma_mask); } + + if (usbmisc_ops && usbmisc_ops->init) { + ret = usbmisc_ops->init(&pdev->dev); + if (ret) { + dev_err(&pdev->dev, + "usbmisc init failed, ret=%d\n", ret); + goto err; + } + } + plat_ci = ci13xxx_add_device(&pdev->dev, pdev->resource, pdev->num_resources, &ci13xxx_imx_platdata); -- cgit v1.2.3