diff options
| author | Rob Herring <robh@kernel.org> | 2015-05-29 18:38:46 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-06-09 21:20:30 +0200 |
| commit | fc6b68ba4990b4fb2625b150599c77d04d85b1eb (patch) | |
| tree | b8edbf17509af3fc7b79167926ca1e3f2ffaadd4 /drivers/usb/chipidea | |
| parent | usb: chipidea: allow multiple instances to use default ci_default_pdata (diff) | |
| download | linux-fc6b68ba4990b4fb2625b150599c77d04d85b1eb.tar.xz linux-fc6b68ba4990b4fb2625b150599c77d04d85b1eb.zip | |
usb: chipidea: add work-around for Marvell HSIC PHY startup
The Marvell 28nm HSIC PHY requires the port to be forced to HS mode after
the port power is applied. This is done using the test mode in the PORTSC
register.
As HSIC is always HS, this work-around should be safe to do with all HSIC
PHYs and has been tested on i.MX6S.
Signed-off-by: Rob Herring <robh@kernel.org>
Tested-by: Peter Chen <Peter.Chen@freescale.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/chipidea')
| -rw-r--r-- | drivers/usb/chipidea/host.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c index 21fe1a314313..6cf87b8b13a8 100644 --- a/drivers/usb/chipidea/host.c +++ b/drivers/usb/chipidea/host.c @@ -37,12 +37,14 @@ static int (*orig_bus_suspend)(struct usb_hcd *hcd); struct ehci_ci_priv { struct regulator *reg_vbus; + struct ci_hdrc *ci; }; static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); struct ehci_ci_priv *priv = (struct ehci_ci_priv *)ehci->priv; + struct ci_hdrc *ci = priv->ci; struct device *dev = hcd->self.controller; int ret = 0; int port = HCS_N_PORTS(ehci->hcs_params); @@ -64,6 +66,15 @@ static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable) return ret; } } + + if (enable && (ci->platdata->phy_mode == USBPHY_INTERFACE_MODE_HSIC)) { + /* + * Marvell 28nm HSIC PHY requires forcing the port to HS mode. + * As HSIC is always HS, this should be safe for others. + */ + hw_port_test_set(ci, 5); + hw_port_test_set(ci, 0); + } return 0; }; @@ -112,6 +123,7 @@ static int host_start(struct ci_hdrc *ci) priv = (struct ehci_ci_priv *)ehci->priv; priv->reg_vbus = NULL; + priv->ci = ci; if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) { if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) { |