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authorFelipe Balbi <balbi@ti.com>2013-07-12 13:19:52 +0300
committerFelipe Balbi <balbi@ti.com>2013-07-29 13:56:52 +0300
commit636e2a2caeafcb1b55b6799b29fe436039819eb9 (patch)
tree0349b92152ee988f9cc8e69099c139ed86f06aa7 /drivers
parenta45c82b84c844cd85b2ed1aa32596f1bffa32716 (diff)
usb: dwc3: gadget: drop dwc3 manual phy control
Recent versions of the core, can suspend and resume the PHYs automatically, so we don't need to fiddle with dwc3's Global PHY registers at all. On versions prior to 1.94a this patch will mean that we will never ask dwc3 to suspend the PHY. This is an acceptable behavior or such old versions of the core, specially considering that the only chip known to have a version prior to 1.94a was OMAP5 ES1.0 and that's not supported in mainline kernel, because it was just a test spin of OMAP5. Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/dwc3/gadget.c61
1 files changed, 0 insertions, 61 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 4ca5706f3a86..c7be039d8551 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2105,34 +2105,6 @@ static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc)
dwc->setup_packet_pending = false;
}
-static void dwc3_gadget_usb3_phy_suspend(struct dwc3 *dwc, int suspend)
-{
- u32 reg;
-
- reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
-
- if (suspend)
- reg |= DWC3_GUSB3PIPECTL_SUSPHY;
- else
- reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
-
- dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
-}
-
-static void dwc3_gadget_usb2_phy_suspend(struct dwc3 *dwc, int suspend)
-{
- u32 reg;
-
- reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
-
- if (suspend)
- reg |= DWC3_GUSB2PHYCFG_SUSPHY;
- else
- reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
-
- dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
-}
-
static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc)
{
u32 reg;
@@ -2173,13 +2145,6 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc)
/* after reset -> Default State */
usb_gadget_set_state(&dwc->gadget, USB_STATE_DEFAULT);
- /* Recent versions support automatic phy suspend and don't need this */
- if (dwc->revision < DWC3_REVISION_194A) {
- /* Resume PHYs */
- dwc3_gadget_usb2_phy_suspend(dwc, false);
- dwc3_gadget_usb3_phy_suspend(dwc, false);
- }
-
if (dwc->gadget.speed != USB_SPEED_UNKNOWN)
dwc3_disconnect_gadget(dwc);
@@ -2223,20 +2188,6 @@ static void dwc3_update_ram_clk_sel(struct dwc3 *dwc, u32 speed)
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
}
-static void dwc3_gadget_phy_suspend(struct dwc3 *dwc, u8 speed)
-{
- switch (speed) {
- case USB_SPEED_SUPER:
- dwc3_gadget_usb2_phy_suspend(dwc, true);
- break;
- case USB_SPEED_HIGH:
- case USB_SPEED_FULL:
- case USB_SPEED_LOW:
- dwc3_gadget_usb3_phy_suspend(dwc, true);
- break;
- }
-}
-
static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
{
struct dwc3_ep *dep;
@@ -2312,12 +2263,6 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
}
- /* Recent versions support automatic phy suspend and don't need this */
- if (dwc->revision < DWC3_REVISION_194A) {
- /* Suspend unneeded PHY */
- dwc3_gadget_phy_suspend(dwc, dwc->gadget.speed);
- }
-
dep = dwc->eps[0];
ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true);
if (ret) {
@@ -2647,12 +2592,6 @@ int dwc3_gadget_init(struct dwc3 *dwc)
reg |= DWC3_DCFG_LPM_CAP;
dwc3_writel(dwc->regs, DWC3_DCFG, reg);
- /* Enable USB2 LPM and automatic phy suspend only on recent versions */
- if (dwc->revision >= DWC3_REVISION_194A) {
- dwc3_gadget_usb2_phy_suspend(dwc, false);
- dwc3_gadget_usb3_phy_suspend(dwc, false);
- }
-
ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget);
if (ret) {
dev_err(dwc->dev, "failed to register udc\n");

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