brcm47xx: add initial support for kernel 2.6.38

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26524 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 345 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/patches-2.6.38/022-USB-Add-ehci-ssb-driver.patch b/target/linux/brcm47xx/patches-2.6.38/022-USB-Add-ehci-ssb-driver.patch
new file mode 100644
index 0000000000..496b6c078f
--- /dev/null
+++ b/target/linux/brcm47xx/patches-2.6.38/022-USB-Add-ehci-ssb-driver.patch
@@ -0,0 +1,345 @@
+From ad224c0d5fa0fc05f8aaef3c19fc9b4eb275a5d2 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Sun, 18 Jul 2010 21:29:40 +0200
+Subject: [PATCH 2/2] USB: Add ehci ssb driver
+
+Support for the Sonics Silicon Backplane (SSB) attached Broadcom USB EHCI core.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ drivers/usb/host/Kconfig    |   13 ++
+ drivers/usb/host/ehci-hcd.c |   22 ++++-
+ drivers/usb/host/ehci-ssb.c |  255 +++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 288 insertions(+), 2 deletions(-)
+ create mode 100644 drivers/usb/host/ehci-ssb.c
+
+--- a/drivers/usb/host/Kconfig
++++ b/drivers/usb/host/Kconfig
+@@ -189,6 +189,19 @@ config USB_OXU210HP_HCD
+ 	  To compile this driver as a module, choose M here: the
+ 	  module will be called oxu210hp-hcd.
+ 
++config USB_EHCI_HCD_SSB
++	bool "EHCI support for Broadcom SSB EHCI core"
++	depends on USB_EHCI_HCD && (SSB = y || SSB = USB_EHCI_HCD) && EXPERIMENTAL
++	default n
++	---help---
++	  Support for the Sonics Silicon Backplane (SSB) attached
++	  Broadcom USB EHCI core.
++
++	  This device is present in some embedded devices with
++	  Broadcom based SSB bus.
++
++	  If unsure, say N.
++
+ config USB_ISP116X_HCD
+ 	tristate "ISP116X HCD support"
+ 	depends on USB
+--- a/drivers/usb/host/ehci-hcd.c
++++ b/drivers/usb/host/ehci-hcd.c
+@@ -1254,9 +1254,14 @@ MODULE_LICENSE ("GPL");
+ #define PLATFORM_DRIVER		ehci_msm_driver
+ #endif
+ 
++#ifdef CONFIG_USB_EHCI_HCD_SSB
++#include "ehci-ssb.c"
++#define SSB_EHCI_DRIVER		ssb_ehci_driver
++#endif
++
+ #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
+     !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
+-    !defined(XILINX_OF_PLATFORM_DRIVER)
++    !defined(XILINX_OF_PLATFORM_DRIVER) && !defined(SSB_EHCI_DRIVER)
+ #error "missing bus glue for ehci-hcd"
+ #endif
+ 
+@@ -1316,10 +1321,20 @@ static int __init ehci_hcd_init(void)
+ 	if (retval < 0)
+ 		goto clean4;
+ #endif
++
++#ifdef SSB_EHCI_DRIVER
++	retval = ssb_driver_register(&SSB_EHCI_DRIVER);
++	if (retval < 0)
++		goto clean5;
++#endif
+ 	return retval;
+ 
++#ifdef SSB_EHCI_DRIVER
++	/* ssb_driver_unregister(&SSB_EHCI_DRIVER); */
++clean5:
++#endif
+ #ifdef XILINX_OF_PLATFORM_DRIVER
+-	/* of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER); */
++	of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER);
+ clean4:
+ #endif
+ #ifdef OF_PLATFORM_DRIVER
+@@ -1350,6 +1365,9 @@ module_init(ehci_hcd_init);
+ 
+ static void __exit ehci_hcd_cleanup(void)
+ {
++#ifdef SSB_EHCI_DRIVER
++	ssb_driver_unregister(&SSB_EHCI_DRIVER);
++#endif
+ #ifdef XILINX_OF_PLATFORM_DRIVER
+ 	of_unregister_platform_driver(&XILINX_OF_PLATFORM_DRIVER);
+ #endif
+--- /dev/null
++++ b/drivers/usb/host/ehci-ssb.c
+@@ -0,0 +1,255 @@
++/*
++ * Sonics Silicon Backplane
++ * Broadcom USB-core EHCI driver (SSB bus glue)
++ *
++ * Copyright 2007 Steven Brown <sbrown@cortland.com>
++ * Copyright 2010 Hauke Mehrtens <hauke@hauke-m.de>
++ *
++ * Derived from the OHCI-SSB driver
++ * Copyright 2007 Michael Buesch <mb@bu3sch.de>
++ *
++ * Derived from the EHCI-PCI driver
++ * Copyright (c) 2000-2004 by David Brownell
++ *
++ * Derived from the OHCI-PCI driver
++ * Copyright 1999 Roman Weissgaerber
++ * Copyright 2000-2002 David Brownell
++ * Copyright 1999 Linus Torvalds
++ * Copyright 1999 Gregory P. Smith
++ *
++ * Derived from the USBcore related parts of Broadcom-SB
++ * Copyright 2005 Broadcom Corporation
++ *
++ * Licensed under the GNU/GPL. See COPYING for details.
++ */
++#include <linux/ssb/ssb.h>
++
++
++struct ssb_ehci_device {
++	struct ehci_hcd ehci; /* _must_ be at the beginning. */
++};
++
++static inline
++struct ssb_ehci_device *hcd_to_ssb_ehci(struct usb_hcd *hcd)
++{
++	return (struct ssb_ehci_device *)(hcd->hcd_priv);
++}
++
++static int ssb_ehci_reset(struct usb_hcd *hcd)
++{
++	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
++	int err;
++
++	ehci->caps = hcd->regs;
++	ehci->regs = hcd->regs +
++		HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
++
++	dbg_hcs_params(ehci, "reset");
++	dbg_hcc_params(ehci, "reset");
++
++	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
++
++	err = ehci_halt(ehci);
++
++	if (err)
++		return err;
++
++	err = ehci_init(hcd);
++
++	if (err)
++		return err;
++
++	ehci_reset(ehci);
++
++	return err;
++}
++
++static const struct hc_driver ssb_ehci_hc_driver = {
++	.description		= "ssb-usb-ehci",
++	.product_desc		= "SSB EHCI Controller",
++	.hcd_priv_size		= sizeof(struct ssb_ehci_device),
++
++	.irq			= ehci_irq,
++	.flags			= HCD_MEMORY | HCD_USB2,
++
++	.reset			= ssb_ehci_reset,
++	.start			= ehci_run,
++	.stop			= ehci_stop,
++	.shutdown		= ehci_shutdown,
++
++	.urb_enqueue		= ehci_urb_enqueue,
++	.urb_dequeue		= ehci_urb_dequeue,
++	.endpoint_disable	= ehci_endpoint_disable,
++	.endpoint_reset		= ehci_endpoint_reset,
++
++	.get_frame_number	= ehci_get_frame,
++
++	.hub_status_data	= ehci_hub_status_data,
++	.hub_control		= ehci_hub_control,
++#if defined(CONFIG_PM)
++	.bus_suspend		= ehci_bus_suspend,
++	.bus_resume		= ehci_bus_resume,
++#endif
++	.relinquish_port	= ehci_relinquish_port,
++	.port_handed_over	= ehci_port_handed_over,
++
++	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
++};
++
++static void ssb_ehci_detach(struct ssb_device *dev)
++{
++	struct usb_hcd *hcd = ssb_get_drvdata(dev);
++
++	if (hcd->driver->shutdown)
++		hcd->driver->shutdown(hcd);
++	usb_remove_hcd(hcd);
++	iounmap(hcd->regs);
++	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
++	usb_put_hcd(hcd);
++	ssb_device_disable(dev, 0);
++}
++
++static int ssb_ehci_attach(struct ssb_device *dev)
++{
++	struct ssb_ehci_device *ehcidev;
++	struct usb_hcd *hcd;
++	int err = -ENOMEM;
++	u32 tmp;
++
++	if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) ||
++	    dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32)))
++		return -EOPNOTSUPP;
++
++	/*
++	 * USB 2.0 special considerations:
++	 *
++	 * In addition to the standard SSB reset sequence, the Host Control
++	 * Register must be programmed to bring the USB core and various phy
++	 * components out of reset.
++	 */
++	ssb_device_enable(dev, 0);
++	ssb_write32(dev, 0x200, 0x7ff);
++
++	/* Change Flush control reg */
++	tmp = ssb_read32(dev, 0x400);
++	tmp &= ~8;
++	ssb_write32(dev, 0x400, tmp);
++	tmp = ssb_read32(dev, 0x400);
++
++	/* Change Shim control reg */
++	tmp = ssb_read32(dev, 0x304);
++	tmp &= ~0x100;
++	ssb_write32(dev, 0x304, tmp);
++	tmp = ssb_read32(dev, 0x304);
++
++	udelay(1);
++
++	/* Work around for 5354 failures */
++	if (dev->id.revision == 2 && dev->bus->chip_id == 0x5354) {
++		/* Change syn01 reg */
++		tmp = 0x00fe00fe;
++		ssb_write32(dev, 0x894, tmp);
++
++		/* Change syn03 reg */
++		tmp = ssb_read32(dev, 0x89c);
++		tmp |= 0x1;
++		ssb_write32(dev, 0x89c, tmp);
++	}
++
++	hcd = usb_create_hcd(&ssb_ehci_hc_driver, dev->dev,
++			     dev_name(dev->dev));
++	if (!hcd)
++		goto err_dev_disable;
++
++	ehcidev = hcd_to_ssb_ehci(hcd);
++	tmp = ssb_read32(dev, SSB_ADMATCH0);
++	hcd->rsrc_start = ssb_admatch_base(tmp) + 0x800; /* ehci core offset */
++	hcd->rsrc_len = 0x100; /* ehci reg block size */
++	/*
++	 * start & size modified per sbutils.c
++	 */
++	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
++	if (!hcd->regs)
++		goto err_put_hcd;
++	err = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
++	if (err)
++		goto err_iounmap;
++
++	ssb_set_drvdata(dev, hcd);
++
++	return err;
++
++err_iounmap:
++	iounmap(hcd->regs);
++err_put_hcd:
++	usb_put_hcd(hcd);
++err_dev_disable:
++	ssb_device_disable(dev, 0);
++	return err;
++}
++
++static int ssb_ehci_probe(struct ssb_device *dev,
++		const struct ssb_device_id *id)
++{
++	int err;
++	u16 chipid_top;
++
++	/* USBcores are only connected on embedded devices. */
++	chipid_top = (dev->bus->chip_id & 0xFF00);
++	if (chipid_top != 0x4700 && chipid_top != 0x5300)
++		return -ENODEV;
++
++	/* TODO: Probably need checks here; is the core connected? */
++
++	if (usb_disabled())
++		return -ENODEV;
++
++	err = ssb_ehci_attach(dev);
++
++	return err;
++}
++
++static void ssb_ehci_remove(struct ssb_device *dev)
++{
++	ssb_ehci_detach(dev);
++}
++
++#ifdef CONFIG_PM
++
++static int ssb_ehci_suspend(struct ssb_device *dev, pm_message_t state)
++{
++	ssb_device_disable(dev, 0);
++
++	return 0;
++}
++
++static int ssb_ehci_resume(struct ssb_device *dev)
++{
++	struct usb_hcd *hcd = ssb_get_drvdata(dev);
++	struct ssb_ehci_device *ehcidev = hcd_to_ssb_ehci(hcd);
++
++	ssb_device_enable(dev, 0);
++
++	ehci_finish_controller_resume(hcd);
++	return 0;
++}
++
++#else /* !CONFIG_PM */
++#define ssb_ehci_suspend	NULL
++#define ssb_ehci_resume	NULL
++#endif /* CONFIG_PM */
++
++static const struct ssb_device_id ssb_ehci_table[] = {
++	SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV),
++	SSB_DEVTABLE_END
++};
++MODULE_DEVICE_TABLE(ssb, ssb_ehci_table);
++
++static struct ssb_driver ssb_ehci_driver = {
++	.name		= KBUILD_MODNAME,
++	.id_table	= ssb_ehci_table,
++	.probe		= ssb_ehci_probe,
++	.remove		= ssb_ehci_remove,
++	.suspend	= ssb_ehci_suspend,
++	.resume		= ssb_ehci_resume,
++};