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authorFelipe Balbi <balbi@ti.com>2013-10-29 12:17:16 -0500
committerFelipe Balbi <balbi@ti.com>2013-11-26 10:35:14 -0600
commit943c13971c08ddeb06f4cb9dea1addb76f6b4423 (patch)
tree0712df52363977e91d0f4d875c51e7e7e885358d /drivers/usb/musb
parent989c78dd56307c85f710533130a2a464f6f3c5ae (diff)
usb: musb: dsps: implement ->set_mode()
this will let us support broken designs such as AM335x EVM SK where ID pin isn't routed anywhere on a host port. With this we can toggle internal IDDIG signal and make sure MUSB goes into host mode as necessary. Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/musb')
-rw-r--r--drivers/usb/musb/musb_dsps.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index 1901f6fe580..ce7ec014a12 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -106,6 +106,7 @@ struct dsps_musb_wrapper {
/* bit positions for mode */
unsigned iddig:5;
+ unsigned iddig_mux:5;
/* miscellaneous stuff */
u8 poll_seconds;
};
@@ -406,6 +407,54 @@ static int dsps_musb_exit(struct musb *musb)
return 0;
}
+static int dsps_musb_set_mode(struct musb *musb, u8 mode)
+{
+ struct device *dev = musb->controller;
+ struct dsps_glue *glue = dev_get_drvdata(dev->parent);
+ const struct dsps_musb_wrapper *wrp = glue->wrp;
+ void __iomem *ctrl_base = musb->ctrl_base;
+ void __iomem *base = musb->mregs;
+ u32 reg;
+
+ reg = dsps_readl(base, wrp->mode);
+
+ switch (mode) {
+ case MUSB_HOST:
+ reg &= ~(1 << wrp->iddig);
+
+ /*
+ * if we're setting mode to host-only or device-only, we're
+ * going to ignore whatever the PHY sends us and just force
+ * ID pin status by SW
+ */
+ reg |= (1 << wrp->iddig_mux);
+
+ dsps_writel(base, wrp->mode, reg);
+ dsps_writel(ctrl_base, wrp->phy_utmi, 0x02);
+ break;
+ case MUSB_PERIPHERAL:
+ reg |= (1 << wrp->iddig);
+
+ /*
+ * if we're setting mode to host-only or device-only, we're
+ * going to ignore whatever the PHY sends us and just force
+ * ID pin status by SW
+ */
+ reg |= (1 << wrp->iddig_mux);
+
+ dsps_writel(base, wrp->mode, reg);
+ break;
+ case MUSB_OTG:
+ dsps_writel(base, wrp->phy_utmi, 0x02);
+ break;
+ default:
+ dev_err(glue->dev, "unsupported mode %d\n", mode);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static struct musb_platform_ops dsps_ops = {
.init = dsps_musb_init,
.exit = dsps_musb_exit,
@@ -414,6 +463,7 @@ static struct musb_platform_ops dsps_ops = {
.disable = dsps_musb_disable,
.try_idle = dsps_musb_try_idle,
+ .set_mode = dsps_musb_set_mode,
};
static u64 musb_dmamask = DMA_BIT_MASK(32);
@@ -608,6 +658,7 @@ static const struct dsps_musb_wrapper am33xx_driver_data = {
.reset = 0,
.otg_disable = 21,
.iddig = 8,
+ .iddig_mux = 7,
.usb_shift = 0,
.usb_mask = 0x1ff,
.usb_bitmap = (0x1ff << 0),