This allows run-time dr_mode switching support via the "mode" musb
sysfs attribute.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/usb/musb/sunxi.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/drivers/usb/musb/sunxi.c b/drivers/usb/musb/sunxi.c
index 868db03..bfd5f23 100644
--- a/drivers/usb/musb/sunxi.c
+++ b/drivers/usb/musb/sunxi.c
@@ -74,6 +74,7 @@
#define SUNXI_MUSB_FL_HAS_SRAM 5
#define SUNXI_MUSB_FL_HAS_RESET 6
#define SUNXI_MUSB_FL_NO_CONFIGDATA 7
+#define SUNXI_MUSB_FL_PHY_MODE_PEND 8
/* Our read/write methods need access and do not get passed in a musb ref :| */
static struct musb *sunxi_musb;
@@ -87,6 +88,7 @@ struct sunxi_glue {
struct phy *phy;
struct platform_device *usb_phy;
struct usb_phy *xceiv;
+ enum phy_mode phy_mode;
unsigned long flags;
struct work_struct work;
struct extcon_dev *extcon;
@@ -140,6 +142,9 @@ static void sunxi_musb_work(struct work_struct *work)
clear_bit(SUNXI_MUSB_FL_PHY_ON, &glue->flags);
}
}
+
+ if (test_and_clear_bit(SUNXI_MUSB_FL_PHY_MODE_PEND, &glue->flags))
+ phy_set_mode(glue->phy, glue->phy_mode);
}
static void sunxi_musb_set_vbus(struct musb *musb, int is_on)
@@ -341,6 +346,41 @@ static void sunxi_musb_dma_controller_destroy(struct dma_controller *c)
{
}
+static int sunxi_musb_set_mode(struct musb *musb, u8 mode)
+{
+ struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
+ enum phy_mode new_mode;
+
+ switch (mode) {
+#if defined CONFIG_USB_MUSB_DUAL_ROLE || defined CONFIG_USB_MUSB_HOST
+ case MUSB_HOST: new_mode = PHY_MODE_USB_HOST; break;
+#endif
+#if defined CONFIG_USB_MUSB_DUAL_ROLE || defined CONFIG_USB_MUSB_GADGET
+ case MUSB_PERIPHERAL: new_mode = PHY_MODE_USB_DEVICE; break;
+#endif
+#ifdef CONFIG_USB_MUSB_DUAL_ROLE
+ case MUSB_OTG: new_mode = PHY_MODE_USB_OTG; break;
+#endif
+ default:
+ dev_err(musb->controller->parent,
+ "Error requested mode not supported by this kernel\n");
+ return -EINVAL;
+ }
+
+ if (glue->phy_mode == new_mode)
+ return 0;
+
+ /*
+ * phy_set_mode may sleep, and we're called with a spinlock held,
+ * so let sunxi_musb_work deal with it.
+ */
+ glue->phy_mode = new_mode;
+ set_bit(SUNXI_MUSB_FL_PHY_MODE_PEND, &glue->flags);
+ schedule_work(&glue->work);
+
+ return 0;
+}
+
/*
* sunxi musb register layout
* 0x00 - 0x17 fifo regs, 1 long per fifo
@@ -568,6 +608,7 @@ static const struct musb_platform_ops sunxi_musb_ops = {
.writew = sunxi_musb_writew,
.dma_init = sunxi_musb_dma_controller_create,
.dma_exit = sunxi_musb_dma_controller_destroy,
+ .set_mode = sunxi_musb_set_mode,
.set_vbus = sunxi_musb_set_vbus,
.pre_root_reset_end = sunxi_musb_pre_root_reset_end,
.post_root_reset_end = sunxi_musb_post_root_reset_end,
@@ -627,6 +668,7 @@ static int sunxi_musb_probe(struct platform_device *pdev)
glue->dev = &pdev->dev;
INIT_WORK(&glue->work, sunxi_musb_work);
glue->host_nb.notifier_call = sunxi_musb_host_notifier;
+ glue->phy_mode = PHY_MODE_USB_OTG;
if (of_device_is_compatible(np, "allwinner,sun4i-a10-musb"))
set_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags);
--
2.7.4
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