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git://projects.qi-hardware.com/openwrt-xburst.git
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9ae7818ff7
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9685 3c298f89-4303-0410-b956-a3cf2f4a3e73
348 lines
8.4 KiB
Diff
348 lines
8.4 KiB
Diff
From: Michael Buesch <mb@bu3sch.de>
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Date: Wed, 10 Oct 2007 06:47:17 +0000 (-0700)
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Subject: USB: ohci SSB bus glue
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X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Fralf%2Flinux.git;a=commitdiff_plain;h=c604e851486eabcbeb73e984279d436ce121fd5d
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USB: ohci SSB bus glue
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This adds SSB bus glue for the USB OHCI HCD.
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Signed-off-by: Michael Buesch <mb@bu3sch.de>
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Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
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Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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---
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diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
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index 565d6ef..c978d62 100644
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--- a/drivers/usb/host/Kconfig
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+++ b/drivers/usb/host/Kconfig
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@@ -154,6 +154,19 @@ config USB_OHCI_HCD_PCI
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Enables support for PCI-bus plug-in USB controller cards.
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If unsure, say Y.
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+config USB_OHCI_HCD_SSB
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+ bool "OHCI support for Broadcom SSB OHCI core"
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+ depends on USB_OHCI_HCD && SSB && EXPERIMENTAL
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+ default n
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+ ---help---
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+ Support for the Sonics Silicon Backplane (SSB) attached
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+ Broadcom USB OHCI core.
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+
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+ This device is present in some embedded devices with
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+ Broadcom based SSB bus.
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+
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+ If unsure, say N.
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+
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config USB_OHCI_BIG_ENDIAN_DESC
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bool
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depends on USB_OHCI_HCD
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diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
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index f7c6ced..240c7f5 100644
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--- a/drivers/usb/host/ohci-hcd.c
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+++ b/drivers/usb/host/ohci-hcd.c
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@@ -1033,11 +1033,17 @@ MODULE_LICENSE ("GPL");
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#define PS3_SYSTEM_BUS_DRIVER ps3_ohci_driver
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#endif
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+#ifdef CONFIG_USB_OHCI_HCD_SSB
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+#include "ohci-ssb.c"
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+#define SSB_OHCI_DRIVER ssb_ohci_driver
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+#endif
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+
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#if !defined(PCI_DRIVER) && \
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!defined(PLATFORM_DRIVER) && \
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!defined(OF_PLATFORM_DRIVER) && \
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!defined(SA1111_DRIVER) && \
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- !defined(PS3_SYSTEM_BUS_DRIVER)
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+ !defined(PS3_SYSTEM_BUS_DRIVER) && \
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+ !defined(SSB_OHCI_DRIVER)
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#error "missing bus glue for ohci-hcd"
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#endif
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@@ -1082,10 +1088,20 @@ static int __init ohci_hcd_mod_init(void)
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goto error_pci;
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#endif
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+#ifdef SSB_OHCI_DRIVER
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+ retval = ssb_driver_register(&SSB_OHCI_DRIVER);
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+ if (retval)
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+ goto error_ssb;
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+#endif
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+
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return retval;
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/* Error path */
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+#ifdef SSB_OHCI_DRIVER
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+ error_ssb:
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+#endif
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#ifdef PCI_DRIVER
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+ pci_unregister_driver(&PCI_DRIVER);
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error_pci:
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#endif
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#ifdef SA1111_DRIVER
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@@ -1110,6 +1126,9 @@ module_init(ohci_hcd_mod_init);
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static void __exit ohci_hcd_mod_exit(void)
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{
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+#ifdef SSB_OHCI_DRIVER
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+ ssb_driver_unregister(&SSB_OHCI_DRIVER);
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+#endif
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#ifdef PCI_DRIVER
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pci_unregister_driver(&PCI_DRIVER);
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#endif
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diff --git a/drivers/usb/host/ohci-ssb.c b/drivers/usb/host/ohci-ssb.c
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new file mode 100644
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index 0000000..bc3e785
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--- /dev/null
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+++ b/drivers/usb/host/ohci-ssb.c
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@@ -0,0 +1,247 @@
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+/*
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+ * Sonics Silicon Backplane
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+ * Broadcom USB-core OHCI driver
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+ *
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+ * Copyright 2007 Michael Buesch <mb@bu3sch.de>
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+ *
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+ * Derived from the OHCI-PCI driver
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+ * Copyright 1999 Roman Weissgaerber
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+ * Copyright 2000-2002 David Brownell
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+ * Copyright 1999 Linus Torvalds
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+ * Copyright 1999 Gregory P. Smith
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+ *
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+ * Derived from the USBcore related parts of Broadcom-SB
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+ * Copyright 2005 Broadcom Corporation
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+ *
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+ * Licensed under the GNU/GPL. See COPYING for details.
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+ */
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+#include <linux/ssb/ssb.h>
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+
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+
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+#define SSB_OHCI_TMSLOW_HOSTMODE (1 << 29)
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+
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+struct ssb_ohci_device {
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+ struct ohci_hcd ohci; /* _must_ be at the beginning. */
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+
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+ u32 enable_flags;
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+};
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+
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+static inline
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+struct ssb_ohci_device *hcd_to_ssb_ohci(struct usb_hcd *hcd)
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+{
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+ return (struct ssb_ohci_device *)(hcd->hcd_priv);
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+}
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+
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+
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+static int ssb_ohci_reset(struct usb_hcd *hcd)
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+{
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+ struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
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+ struct ohci_hcd *ohci = &ohcidev->ohci;
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+ int err;
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+
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+ ohci_hcd_init(ohci);
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+ err = ohci_init(ohci);
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+
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+ return err;
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+}
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+
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+static int ssb_ohci_start(struct usb_hcd *hcd)
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+{
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+ struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
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+ struct ohci_hcd *ohci = &ohcidev->ohci;
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+ int err;
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+
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+ err = ohci_run(ohci);
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+ if (err < 0) {
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+ ohci_err(ohci, "can't start\n");
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+ ohci_stop(hcd);
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+ }
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+
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+ return err;
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+}
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+
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+#ifdef CONFIG_PM
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+static int ssb_ohci_hcd_suspend(struct usb_hcd *hcd, pm_message_t message)
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+{
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+ struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
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+ struct ohci_hcd *ohci = &ohcidev->ohci;
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+ unsigned long flags;
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+
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+ spin_lock_irqsave(&ohci->lock, flags);
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+
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+ ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
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+ ohci_readl(ohci, &ohci->regs->intrdisable); /* commit write */
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+
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+ /* make sure snapshot being resumed re-enumerates everything */
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+ if (message.event == PM_EVENT_PRETHAW)
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+ ohci_usb_reset(ohci);
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+
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+ clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
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+
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+ spin_unlock_irqrestore(&ohci->lock, flags);
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+ return 0;
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+}
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+
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+static int ssb_ohci_hcd_resume(struct usb_hcd *hcd)
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+{
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+ set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
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+ usb_hcd_resume_root_hub(hcd);
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+ return 0;
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+}
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+#endif /* CONFIG_PM */
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+
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+static const struct hc_driver ssb_ohci_hc_driver = {
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+ .description = "ssb-usb-ohci",
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+ .product_desc = "SSB OHCI Controller",
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+ .hcd_priv_size = sizeof(struct ssb_ohci_device),
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+
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+ .irq = ohci_irq,
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+ .flags = HCD_MEMORY | HCD_USB11,
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+
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+ .reset = ssb_ohci_reset,
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+ .start = ssb_ohci_start,
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+ .stop = ohci_stop,
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+ .shutdown = ohci_shutdown,
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+
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+#ifdef CONFIG_PM
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+ .suspend = ssb_ohci_hcd_suspend,
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+ .resume = ssb_ohci_hcd_resume,
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+#endif
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+
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+ .urb_enqueue = ohci_urb_enqueue,
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+ .urb_dequeue = ohci_urb_dequeue,
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+ .endpoint_disable = ohci_endpoint_disable,
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+
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+ .get_frame_number = ohci_get_frame,
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+
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+ .hub_status_data = ohci_hub_status_data,
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+ .hub_control = ohci_hub_control,
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+ .hub_irq_enable = ohci_rhsc_enable,
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+ .bus_suspend = ohci_bus_suspend,
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+ .bus_resume = ohci_bus_resume,
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+
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+ .start_port_reset = ohci_start_port_reset,
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+};
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+
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+static void ssb_ohci_detach(struct ssb_device *dev)
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+{
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+ struct usb_hcd *hcd = ssb_get_drvdata(dev);
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+
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+ usb_remove_hcd(hcd);
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+ iounmap(hcd->regs);
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+ usb_put_hcd(hcd);
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+ ssb_device_disable(dev, 0);
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+}
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+
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+static int ssb_ohci_attach(struct ssb_device *dev)
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+{
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+ struct ssb_ohci_device *ohcidev;
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+ struct usb_hcd *hcd;
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+ int err = -ENOMEM;
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+ u32 tmp, flags = 0;
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+
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+ if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV)
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+ flags |= SSB_OHCI_TMSLOW_HOSTMODE;
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+
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+ ssb_device_enable(dev, flags);
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+
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+ hcd = usb_create_hcd(&ssb_ohci_hc_driver, dev->dev,
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+ dev->dev->bus_id);
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+ if (!hcd)
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+ goto err_dev_disable;
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+ ohcidev = hcd_to_ssb_ohci(hcd);
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+ ohcidev->enable_flags = flags;
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+
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+ tmp = ssb_read32(dev, SSB_ADMATCH0);
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+ hcd->rsrc_start = ssb_admatch_base(tmp);
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+ hcd->rsrc_len = ssb_admatch_size(tmp);
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+ hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
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+ if (!hcd->regs)
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+ goto err_put_hcd;
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+ err = usb_add_hcd(hcd, dev->irq, IRQF_SHARED);
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+ if (err)
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+ goto err_iounmap;
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+
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+ ssb_set_drvdata(dev, hcd);
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+
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+ return err;
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+
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+err_iounmap:
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+ iounmap(hcd->regs);
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+err_put_hcd:
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+ usb_put_hcd(hcd);
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+err_dev_disable:
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+ ssb_device_disable(dev, flags);
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+ return err;
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+}
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+
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+static int ssb_ohci_probe(struct ssb_device *dev,
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+ const struct ssb_device_id *id)
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+{
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+ int err;
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+ u16 chipid_top;
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+
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+ /* USBcores are only connected on embedded devices. */
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+ chipid_top = (dev->bus->chip_id & 0xFF00);
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+ if (chipid_top != 0x4700 && chipid_top != 0x5300)
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+ return -ENODEV;
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+
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+ /* TODO: Probably need checks here; is the core connected? */
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+
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+ if (usb_disabled())
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+ return -ENODEV;
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+
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+ /* We currently always attach SSB_DEV_USB11_HOSTDEV
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+ * as HOST OHCI. If we want to attach it as Client device,
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+ * we must branch here and call into the (yet to
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+ * be written) Client mode driver. Same for remove(). */
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+
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+ err = ssb_ohci_attach(dev);
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+
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+ return err;
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+}
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+
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+static void ssb_ohci_remove(struct ssb_device *dev)
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+{
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+ ssb_ohci_detach(dev);
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+}
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+
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+#ifdef CONFIG_PM
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+
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+static int ssb_ohci_suspend(struct ssb_device *dev, pm_message_t state)
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+{
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+ ssb_device_disable(dev, 0);
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+
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+ return 0;
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+}
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+
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+static int ssb_ohci_resume(struct ssb_device *dev)
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+{
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+ struct usb_hcd *hcd = ssb_get_drvdata(dev);
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+ struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
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+
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+ ssb_device_enable(dev, ohcidev->enable_flags);
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+
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+ return 0;
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+}
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+
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+#else /* !CONFIG_PM */
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+#define ssb_ohci_suspend NULL
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+#define ssb_ohci_resume NULL
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+#endif /* CONFIG_PM */
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+
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+static const struct ssb_device_id ssb_ohci_table[] = {
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+ SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOSTDEV, SSB_ANY_REV),
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+ SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOST, SSB_ANY_REV),
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+ SSB_DEVTABLE_END
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+};
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+MODULE_DEVICE_TABLE(ssb, ssb_ohci_table);
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+
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+static struct ssb_driver ssb_ohci_driver = {
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+ .name = KBUILD_MODNAME,
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+ .id_table = ssb_ohci_table,
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+ .probe = ssb_ohci_probe,
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+ .remove = ssb_ohci_remove,
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+ .suspend = ssb_ohci_suspend,
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+ .resume = ssb_ohci_resume,
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+};
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