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authorYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>2015-11-30 10:44:32 +0900
committerKishon Vijay Abraham I <kishon@ti.com>2015-12-20 15:21:37 +0530
commit9f391c574efc15f00a6c7e3e120c8b84fc9e792f (patch)
treedded23fa669fce2b10564c2ee97475a38e065d3e /drivers/phy
parent1114e2d3173190be3e7339449c45ef11302d905a (diff)
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 <yoshihiro.shimoda.uh@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Diffstat (limited to 'drivers/phy')
-rw-r--r--drivers/phy/phy-rcar-gen3-usb2.c43
1 files changed, 42 insertions, 1 deletions
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 <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
@@ -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); */