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346 lines
8.6 KiB
Diff
346 lines
8.6 KiB
Diff
From ad224c0d5fa0fc05f8aaef3c19fc9b4eb275a5d2 Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Sun, 18 Jul 2010 21:29:40 +0200
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Subject: [PATCH 2/2] USB: Add ehci ssb driver
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Support for the Sonics Silicon Backplane (SSB) attached Broadcom USB EHCI core.
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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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---
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drivers/usb/host/Kconfig | 13 ++
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drivers/usb/host/ehci-hcd.c | 22 ++++-
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drivers/usb/host/ehci-ssb.c | 255 +++++++++++++++++++++++++++++++++++++++++++
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3 files changed, 288 insertions(+), 2 deletions(-)
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create mode 100644 drivers/usb/host/ehci-ssb.c
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--- a/drivers/usb/host/Kconfig
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+++ b/drivers/usb/host/Kconfig
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@@ -153,6 +153,19 @@ config USB_OXU210HP_HCD
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To compile this driver as a module, choose M here: the
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module will be called oxu210hp-hcd.
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+config USB_EHCI_HCD_SSB
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+ bool "EHCI support for Broadcom SSB EHCI core"
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+ depends on USB_EHCI_HCD && (SSB = y || SSB = USB_EHCI_HCD) && 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 EHCI 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_ISP116X_HCD
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tristate "ISP116X HCD support"
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depends on USB
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--- a/drivers/usb/host/ehci-hcd.c
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+++ b/drivers/usb/host/ehci-hcd.c
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@@ -1197,9 +1197,14 @@ MODULE_LICENSE ("GPL");
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#define PLATFORM_DRIVER ehci_atmel_driver
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#endif
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+#ifdef CONFIG_USB_EHCI_HCD_SSB
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+#include "ehci-ssb.c"
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+#define SSB_EHCI_DRIVER ssb_ehci_driver
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+#endif
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+
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#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
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!defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
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- !defined(XILINX_OF_PLATFORM_DRIVER)
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+ !defined(XILINX_OF_PLATFORM_DRIVER) && !defined(SSB_EHCI_DRIVER)
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#error "missing bus glue for ehci-hcd"
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#endif
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@@ -1259,10 +1264,20 @@ static int __init ehci_hcd_init(void)
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if (retval < 0)
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goto clean4;
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#endif
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+
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+#ifdef SSB_EHCI_DRIVER
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+ retval = ssb_driver_register(&SSB_EHCI_DRIVER);
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+ if (retval < 0)
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+ goto clean5;
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+#endif
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return retval;
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+#ifdef SSB_EHCI_DRIVER
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+ /* ssb_driver_unregister(&SSB_EHCI_DRIVER); */
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+clean5:
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+#endif
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#ifdef XILINX_OF_PLATFORM_DRIVER
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- /* of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER); */
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+ of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER);
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clean4:
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#endif
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#ifdef OF_PLATFORM_DRIVER
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@@ -1293,6 +1308,9 @@ module_init(ehci_hcd_init);
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static void __exit ehci_hcd_cleanup(void)
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{
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+#ifdef SSB_EHCI_DRIVER
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+ ssb_driver_unregister(&SSB_EHCI_DRIVER);
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+#endif
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#ifdef XILINX_OF_PLATFORM_DRIVER
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of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER);
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#endif
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--- /dev/null
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+++ b/drivers/usb/host/ehci-ssb.c
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@@ -0,0 +1,255 @@
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+/*
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+ * Sonics Silicon Backplane
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+ * Broadcom USB-core EHCI driver (SSB bus glue)
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+ *
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+ * Copyright 2007 Steven Brown <sbrown@cortland.com>
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+ * Copyright 2010 Hauke Mehrtens <hauke@hauke-m.de>
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+ *
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+ * Derived from the OHCI-SSB driver
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+ * Copyright 2007 Michael Buesch <mb@bu3sch.de>
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+ *
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+ * Derived from the EHCI-PCI driver
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+ * Copyright (c) 2000-2004 by David Brownell
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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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+struct ssb_ehci_device {
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+ struct ehci_hcd ehci; /* _must_ be at the beginning. */
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+};
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+
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+static inline
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+struct ssb_ehci_device *hcd_to_ssb_ehci(struct usb_hcd *hcd)
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+{
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+ return (struct ssb_ehci_device *)(hcd->hcd_priv);
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+}
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+
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+static int ssb_ehci_reset(struct usb_hcd *hcd)
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+{
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+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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+ int err;
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+
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+ ehci->caps = hcd->regs;
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+ ehci->regs = hcd->regs +
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+ HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
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+
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+ dbg_hcs_params(ehci, "reset");
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+ dbg_hcc_params(ehci, "reset");
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+
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+ ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
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+
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+ err = ehci_halt(ehci);
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+
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+ if (err)
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+ return err;
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+
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+ err = ehci_init(hcd);
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+
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+ if (err)
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+ return err;
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+
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+ ehci_reset(ehci);
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+
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+ return err;
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+}
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+
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+static const struct hc_driver ssb_ehci_hc_driver = {
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+ .description = "ssb-usb-ehci",
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+ .product_desc = "SSB EHCI Controller",
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+ .hcd_priv_size = sizeof(struct ssb_ehci_device),
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+
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+ .irq = ehci_irq,
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+ .flags = HCD_MEMORY | HCD_USB2,
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+
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+ .reset = ssb_ehci_reset,
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+ .start = ehci_run,
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+ .stop = ehci_stop,
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+ .shutdown = ehci_shutdown,
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+
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+ .urb_enqueue = ehci_urb_enqueue,
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+ .urb_dequeue = ehci_urb_dequeue,
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+ .endpoint_disable = ehci_endpoint_disable,
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+ .endpoint_reset = ehci_endpoint_reset,
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+
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+ .get_frame_number = ehci_get_frame,
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+
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+ .hub_status_data = ehci_hub_status_data,
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+ .hub_control = ehci_hub_control,
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+#if defined(CONFIG_PM)
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+ .bus_suspend = ehci_bus_suspend,
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+ .bus_resume = ehci_bus_resume,
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+#endif
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+ .relinquish_port = ehci_relinquish_port,
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+ .port_handed_over = ehci_port_handed_over,
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+
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+ .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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+};
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+
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+static void ssb_ehci_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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+ if (hcd->driver->shutdown)
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+ hcd->driver->shutdown(hcd);
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+ usb_remove_hcd(hcd);
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+ iounmap(hcd->regs);
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+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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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_ehci_attach(struct ssb_device *dev)
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+{
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+ struct ssb_ehci_device *ehcidev;
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+ struct usb_hcd *hcd;
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+ int err = -ENOMEM;
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+ u32 tmp;
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+
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+ if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) ||
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+ dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32)))
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+ return -EOPNOTSUPP;
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+
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+ /*
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+ * USB 2.0 special considerations:
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+ *
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+ * In addition to the standard SSB reset sequence, the Host Control
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+ * Register must be programmed to bring the USB core and various phy
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+ * components out of reset.
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+ */
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+ ssb_device_enable(dev, 0);
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+ ssb_write32(dev, 0x200, 0x7ff);
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+
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+ /* Change Flush control reg */
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+ tmp = ssb_read32(dev, 0x400);
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+ tmp &= ~8;
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+ ssb_write32(dev, 0x400, tmp);
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+ tmp = ssb_read32(dev, 0x400);
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+
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+ /* Change Shim control reg */
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+ tmp = ssb_read32(dev, 0x304);
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+ tmp &= ~0x100;
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+ ssb_write32(dev, 0x304, tmp);
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+ tmp = ssb_read32(dev, 0x304);
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+
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+ udelay(1);
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+
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+ /* Work around for 5354 failures */
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+ if (dev->id.revision == 2 && dev->bus->chip_id == 0x5354) {
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+ /* Change syn01 reg */
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+ tmp = 0x00fe00fe;
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+ ssb_write32(dev, 0x894, tmp);
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+
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+ /* Change syn03 reg */
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+ tmp = ssb_read32(dev, 0x89c);
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+ tmp |= 0x1;
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+ ssb_write32(dev, 0x89c, tmp);
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+ }
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+
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+ hcd = usb_create_hcd(&ssb_ehci_hc_driver, dev->dev,
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+ dev_name(dev->dev));
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+ if (!hcd)
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+ goto err_dev_disable;
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+
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+ ehcidev = hcd_to_ssb_ehci(hcd);
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+ tmp = ssb_read32(dev, SSB_ADMATCH0);
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+ hcd->rsrc_start = ssb_admatch_base(tmp) + 0x800; /* ehci core offset */
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+ hcd->rsrc_len = 0x100; /* ehci reg block size */
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+ /*
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+ * start & size modified per sbutils.c
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+ */
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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_DISABLED | 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, 0);
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+ return err;
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+}
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+
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+static int ssb_ehci_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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+ err = ssb_ehci_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_ehci_remove(struct ssb_device *dev)
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+{
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+ ssb_ehci_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_ehci_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_ehci_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_ehci_device *ehcidev = hcd_to_ssb_ehci(hcd);
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+
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+ ssb_device_enable(dev, 0);
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+
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+ ehci_finish_controller_resume(hcd);
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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_ehci_suspend NULL
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+#define ssb_ehci_resume NULL
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+#endif /* CONFIG_PM */
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+
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+static const struct ssb_device_id ssb_ehci_table[] = {
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+ SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV),
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+ SSB_DEVTABLE_END
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+};
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+MODULE_DEVICE_TABLE(ssb, ssb_ehci_table);
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+
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+static struct ssb_driver ssb_ehci_driver = {
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+ .name = KBUILD_MODNAME,
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+ .id_table = ssb_ehci_table,
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+ .probe = ssb_ehci_probe,
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+ .remove = ssb_ehci_remove,
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+ .suspend = ssb_ehci_suspend,
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+ .resume = ssb_ehci_resume,
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+};
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