brcm63xx: allow setting the number of usb host ports for boards

Allow setting the number of available usb host ports for boards with
additional sanity checks to allow using the second port on devices
where it is available.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 39324

1 files changed, 65 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/patches-3.10/206-USB-EHCI-allow-limiting-ports-for-ehci-platform.patch b/target/linux/brcm63xx/patches-3.10/206-USB-EHCI-allow-limiting-ports-for-ehci-platform.patch
new file mode 100644
index 0000000..b6e44a7
--- /dev/null
+++ b/target/linux/brcm63xx/patches-3.10/206-USB-EHCI-allow-limiting-ports-for-ehci-platform.patch
@@ -0,0 +1,65 @@
+From 6ac09efa8f0e189ffe7dd7b0889289de56ee44cc Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jogo@openwrt.org>
+Date: Sun, 19 Jan 2014 12:18:03 +0100
+Subject: [PATCH] USB: EHCI: allow limiting ports for ehci-platform
+
+In the same way as the ohci platform driver allows limiting ports,
+enable the same for ehci. This prevents a mismatch in the available
+ports between ehci/ohci on USB 2.0 controllers.
+
+This is needed if the USB host controller always reports the maximum
+number of ports regardless of the number of available ports (because
+one might be set to be usb device).
+
+Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+---
+ drivers/usb/host/ehci-hcd.c      | 4 ++++
+ drivers/usb/host/ehci-platform.c | 2 ++
+ drivers/usb/host/ehci.h          | 1 +
+ include/linux/usb/ehci_pdriver.h | 1 +
+ 4 files changed, 8 insertions(+)
+
+--- a/drivers/usb/host/ehci-hcd.c
++++ b/drivers/usb/host/ehci-hcd.c
+@@ -661,6 +661,10 @@ int ehci_setup(struct usb_hcd *hcd)
+ 
+ 	/* cache this readonly data; minimize chip reads */
+ 	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
++	if (ehci->num_ports) {
++		ehci->hcs_params &= ~0xf; /* bits 3:0, ports on HC */
++		ehci->hcs_params |= ehci->num_ports;
++	}
+ 
+ 	ehci->sbrn = HCD_USB2;
+ 
+--- a/drivers/usb/host/ehci-platform.c
++++ b/drivers/usb/host/ehci-platform.c
+@@ -48,6 +48,8 @@ static int ehci_platform_reset(struct us
+ 	ehci->big_endian_desc = pdata->big_endian_desc;
+ 	ehci->big_endian_mmio = pdata->big_endian_mmio;
+ 	ehci->ignore_oc = pdata->ignore_oc;
++	if (pdata->num_ports && pdata->num_ports <= 15)
++		ehci->num_ports = pdata->num_ports;
+ 
+ 	ehci->caps = hcd->regs + pdata->caps_offset;
+ 	retval = ehci_setup(hcd);
+--- a/drivers/usb/host/ehci.h
++++ b/drivers/usb/host/ehci.h
+@@ -188,6 +188,7 @@ struct ehci_hcd {			/* one per controlle
+ 	u32			command;
+ 
+ 	/* SILICON QUIRKS */
++	unsigned int		num_ports;
+ 	unsigned		no_selective_suspend:1;
+ 	unsigned		has_fsl_port_bug:1; /* FreeScale */
+ 	unsigned		big_endian_mmio:1;
+--- a/include/linux/usb/ehci_pdriver.h
++++ b/include/linux/usb/ehci_pdriver.h
+@@ -37,6 +37,7 @@
+  */
+ struct usb_ehci_pdata {
+ 	int		caps_offset;
++	unsigned int	num_ports;
+ 	unsigned	has_tt:1;
+ 	unsigned	has_synopsys_hc_bug:1;
+ 	unsigned	big_endian_desc:1;