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usb: host: dwc2: add phy support

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Use generic phy to initialize the PHY associated to the
DWC2 device and available in the device tree.

This patch don't added dependency because when CONFIG_PHY
is not activated, the generic PHY function are stubbed.

Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
This commit is contained in:
Patrick Delaunay 2020-04-27 15:29:58 +02:00 committed by Marek Vasut
parent 6f7917472e
commit e17a4bf198
1 changed files with 66 additions and 0 deletions
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66
drivers/usb/host/dwc2.c
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@ -8,6 +8,7 @@
#include <cpu_func.h>
#include <dm.h>
#include <errno.h>
#include <generic-phy.h>
#include <usb.h>
#include <malloc.h>
#include <memalign.h>
@ -37,6 +38,7 @@ struct dwc2_priv {
#ifdef CONFIG_DM_REGULATOR
struct udevice *vbus_supply;
#endif
struct phy phy;
#else
uint8_t *aligned_buffer;
uint8_t *status_buffer;
@ -1322,13 +1324,71 @@ static int dwc2_usb_ofdata_to_platdata(struct udevice *dev)
return 0;
}
static int dwc2_setup_phy(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
int ret;
ret = generic_phy_get_by_index(dev, 0, &priv->phy);
if (ret) {
if (ret == -ENOENT)
return 0; /* no PHY, nothing to do */
dev_err(dev, "Failed to get USB PHY: %d.\n", ret);
return ret;
}
ret = generic_phy_init(&priv->phy);
if (ret) {
dev_dbg(dev, "Failed to init USB PHY: %d.\n", ret);
return ret;
}
ret = generic_phy_power_on(&priv->phy);
if (ret) {
dev_dbg(dev, "Failed to power on USB PHY: %d.\n", ret);
generic_phy_exit(&priv->phy);
return ret;
}
return 0;
}
static int dwc2_shutdown_phy(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
int ret;
/* PHY is not valid when generic_phy_get_by_index() = -ENOENT */
if (!generic_phy_valid(&priv->phy))
return 0; /* no PHY, nothing to do */
ret = generic_phy_power_off(&priv->phy);
if (ret) {
dev_dbg(dev, "Failed to power off USB PHY: %d.\n", ret);
return ret;
}
ret = generic_phy_exit(&priv->phy);
if (ret) {
dev_dbg(dev, "Failed to power off USB PHY: %d.\n", ret);
return ret;
}
return 0;
}
static int dwc2_usb_probe(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
struct usb_bus_priv *bus_priv = dev_get_uclass_priv(dev);
int ret;
bus_priv->desc_before_addr = true;
ret = dwc2_setup_phy(dev);
if (ret)
return ret;
return dwc2_init_common(dev, priv);
}
@ -1341,6 +1401,12 @@ static int dwc2_usb_remove(struct udevice *dev)
if (ret)
return ret;
ret = dwc2_shutdown_phy(dev);
if (ret) {
dev_dbg(dev, "Failed to shutdown USB PHY: %d.\n", ret);
return ret;
}
dwc2_uninit_common(priv->regs);
reset_release_bulk(&priv->resets);