From 9f391c574efc15f00a6c7e3e120c8b84fc9e792f Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Mon, 30 Nov 2015 10:44:32 +0900 Subject: [PATCH] phy: rcar-gen3-usb2: add runtime ID/VBUS pin detection This patch adds support for runtime ID/VBUS pin detection if the channel 0 of R-Car gen3 is used. So, we are able to use the channel as both host and peripheral. Signed-off-by: Yoshihiro Shimoda Acked-by: Rob Herring Signed-off-by: Kishon Vijay Abraham I --- .../bindings/phy/rcar-gen3-phy-usb2.txt | 2 + drivers/phy/phy-rcar-gen3-usb2.c | 43 ++++++++++++++++++- 2 files changed, 44 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt index affa0f72658b..2390e4e9c84c 100644 --- a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt +++ b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt @@ -18,6 +18,7 @@ properties. This is because HSUSB has registers to select USB 2.0 host or peripheral at that channel: - reg: offset and length of the partial HSUSB register block. - reg-names: must be "hsusb". +- interrupts: interrupt specifier for the PHY. Example (R-Car H3): @@ -25,6 +26,7 @@ Example (R-Car H3): compatible = "renesas,usb2-phy-r8a7795"; reg = <0 0xee080200 0 0x700>, <0 0xe6590100 0 0x100>; reg-names = "usb2_host", "hsusb"; + interrupts = ; clocks = <&mstp7_clks R8A7795_CLK_EHCI0>, <&mstp7_clks R8A7795_CLK_HSUSB>; }; diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c index 2b5d890554ad..ef332ef4abc7 100644 --- a/drivers/phy/phy-rcar-gen3-usb2.c +++ b/drivers/phy/phy-rcar-gen3-usb2.c @@ -12,6 +12,7 @@ * published by the Free Software Foundation. */ +#include #include #include #include @@ -25,14 +26,18 @@ #define USB2_SPD_RSM_TIMSET 0x10c #define USB2_OC_TIMSET 0x110 #define USB2_COMMCTRL 0x600 +#define USB2_OBINTSTA 0x604 +#define USB2_OBINTEN 0x608 #define USB2_VBCTRL 0x60c #define USB2_LINECTRL1 0x610 #define USB2_ADPCTRL 0x630 /* INT_ENABLE */ +#define USB2_INT_ENABLE_UCOM_INTEN BIT(3) #define USB2_INT_ENABLE_USBH_INTB_EN BIT(2) #define USB2_INT_ENABLE_USBH_INTA_EN BIT(1) -#define USB2_INT_ENABLE_INIT (USB2_INT_ENABLE_USBH_INTB_EN | \ +#define USB2_INT_ENABLE_INIT (USB2_INT_ENABLE_UCOM_INTEN | \ + USB2_INT_ENABLE_USBH_INTB_EN | \ USB2_INT_ENABLE_USBH_INTA_EN) /* USBCTR */ @@ -48,6 +53,12 @@ /* COMMCTRL */ #define USB2_COMMCTRL_OTG_PERI BIT(31) /* 1 = Peripheral mode */ +/* OBINTSTA and OBINTEN */ +#define USB2_OBINT_SESSVLDCHG BIT(12) +#define USB2_OBINT_IDDIGCHG BIT(11) +#define USB2_OBINT_BITS (USB2_OBINT_SESSVLDCHG | \ + USB2_OBINT_IDDIGCHG) + /* VBCTRL */ #define USB2_VBCTRL_DRVVBUSSEL BIT(8) @@ -174,6 +185,9 @@ static void rcar_gen3_init_otg(struct rcar_gen3_chan *ch) val = readl(usb2_base + USB2_VBCTRL); writel(val | USB2_VBCTRL_DRVVBUSSEL, usb2_base + USB2_VBCTRL); + writel(USB2_OBINT_BITS, usb2_base + USB2_OBINTSTA); + val = readl(usb2_base + USB2_OBINTEN); + writel(val | USB2_OBINT_BITS, usb2_base + USB2_OBINTEN); val = readl(usb2_base + USB2_ADPCTRL); writel(val | USB2_ADPCTRL_IDPULLUP, usb2_base + USB2_ADPCTRL); val = readl(usb2_base + USB2_LINECTRL1); @@ -270,6 +284,23 @@ static struct phy_ops rcar_gen3_phy_usb2_ops = { .owner = THIS_MODULE, }; +static irqreturn_t rcar_gen3_phy_usb2_irq(int irq, void *_ch) +{ + struct rcar_gen3_chan *ch = _ch; + void __iomem *usb2_base = ch->usb2.base; + u32 status = readl(usb2_base + USB2_OBINTSTA); + irqreturn_t ret = IRQ_NONE; + + if (status & USB2_OBINT_BITS) { + dev_vdbg(&ch->phy->dev, "%s: %08x\n", __func__, status); + writel(USB2_OBINT_BITS, usb2_base + USB2_OBINTSTA); + rcar_gen3_device_recognition(ch); + ret = IRQ_HANDLED; + } + + return ret; +} + static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = { { .compatible = "renesas,usb2-phy-r8a7795" }, { } @@ -302,9 +333,19 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev) /* To avoid error message by devm_ioremap_resource() */ if (res) { + int irq; + channel->hsusb.base = devm_ioremap_resource(dev, res); if (IS_ERR(channel->hsusb.base)) channel->hsusb.base = NULL; + /* call request_irq for OTG */ + irq = platform_get_irq(pdev, 0); + if (irq >= 0) + irq = devm_request_irq(dev, irq, rcar_gen3_phy_usb2_irq, + IRQF_SHARED, dev_name(dev), + channel); + if (irq < 0) + dev_err(dev, "No irq handler (%d)\n", irq); } /* devm_phy_create() will call pm_runtime_enable(dev); */