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- 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
- @@ -666,6 +666,10 @@ 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
- @@ -60,6 +60,9 @@ static int ehci_platform_reset(struct us
-
- ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
-
- + if (pdata->num_ports && pdata->num_ports <= 15)
- + ehci->num_ports = pdata->num_ports;
- +
- if (pdata->pre_setup) {
- retval = pdata->pre_setup(hcd);
- if (retval < 0)
- --- a/drivers/usb/host/ehci.h
- +++ b/drivers/usb/host/ehci.h
- @@ -213,6 +213,7 @@ 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 has_fsl_hs_errata:1; /* Freescale HS quirk */
- --- a/include/linux/usb/ehci_pdriver.h
- +++ b/include/linux/usb/ehci_pdriver.h
- @@ -42,6 +42,7 @@ struct usb_hcd;
- */
- 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;
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