From 3bb8029a2445e289efade6133b01545143336f70 Mon Sep 17 00:00:00 2001 From: Eric Bénard Date: Thu, 13 Jan 2011 14:53:17 +0100 Subject: USB: unbreak ehci-mxc on otg port of i.MX27 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit 711669e5b80b6f2d88f61ed8a9681f83d8cbd201 fixed port 0 support for i.MX51 but broke it for (at least) i.MX27 which doesn't have a usb_phy1 clock but has a pdev->id 0. Signed-off-by: Eric Bénard Cc: Arnaud Patard Cc: Sascha Hauer Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-mxc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/usb/host/ehci-mxc.c') diff --git a/drivers/usb/host/ehci-mxc.c b/drivers/usb/host/ehci-mxc.c index fa59b26fc5bc..d443fbd8535b 100644 --- a/drivers/usb/host/ehci-mxc.c +++ b/drivers/usb/host/ehci-mxc.c @@ -177,8 +177,8 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev) clk_enable(priv->ahbclk); } - /* "dr" device has its own clock */ - if (pdev->id == 0) { + /* "dr" device has its own clock on i.MX51 */ + if (cpu_is_mx51() && (pdev->id == 0)) { priv->phy1clk = clk_get(dev, "usb_phy1"); if (IS_ERR(priv->phy1clk)) { ret = PTR_ERR(priv->phy1clk); -- cgit v1.2.3 From a464dc4d4044c936d4558725fa2229fb4a1aa932 Mon Sep 17 00:00:00 2001 From: "Arnaud Patard (Rtp)" Date: Tue, 18 Jan 2011 00:04:12 +0100 Subject: USB: ehci-mxc: add work-around for efika mx/sb bug Add support for setting CHRGVBUS to workaround a hardware bug on efika mx/sb boards. See http://lists.infradead.org/pipermail/linux-arm-kernel/2011-January/037341.html Signed-off-by: Arnaud Patard Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-mxc.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'drivers/usb/host/ehci-mxc.c') diff --git a/drivers/usb/host/ehci-mxc.c b/drivers/usb/host/ehci-mxc.c index d443fbd8535b..c8e360d7d975 100644 --- a/drivers/usb/host/ehci-mxc.c +++ b/drivers/usb/host/ehci-mxc.c @@ -21,10 +21,13 @@ #include #include #include +#include #include #include +#include + #define ULPI_VIEWPORT_OFFSET 0x170 struct ehci_mxc_priv { @@ -114,6 +117,7 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev) struct usb_hcd *hcd; struct resource *res; int irq, ret; + unsigned int flags; struct ehci_mxc_priv *priv; struct device *dev = &pdev->dev; struct ehci_hcd *ehci; @@ -240,6 +244,23 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev) if (ret) goto err_add; + if (pdata->otg) { + /* + * efikamx and efikasb have some hardware bug which is + * preventing usb to work unless CHRGVBUS is set. + * It's in violation of USB specs + */ + if (machine_is_mx51_efikamx() || machine_is_mx51_efikasb()) { + flags = otg_io_read(pdata->otg, ULPI_OTG_CTRL); + flags |= ULPI_OTG_CTRL_CHRGVBUS; + ret = otg_io_write(pdata->otg, flags, ULPI_OTG_CTRL); + if (ret) { + dev_err(dev, "unable to set CHRVBUS\n"); + goto err_add; + } + } + } + return 0; err_add: -- cgit v1.2.3