--- /dev/null
+
+--- a/drivers/usb/host/Kconfig
++++ b/drivers/usb/host/Kconfig
+@@ -645,3 +645,15 @@ config USB_HCD_BCMA
+ for ehci and ohci.
+
+ If unsure, say N.
++
++config USB_HCD_SSB
++ tristate "SSB usb host driver"
++ depends on SSB && EXPERIMENTAL
++ select USB_OHCI_HCD_PLATFORM if USB_OHCI_HCD
++ select USB_EHCI_HCD_PLATFORM if USB_EHCI_HCD
++ help
++ Enbale support for the EHCI and OCHI host controller on an bcma bus.
++ It converts the bcma driver into two platform device drivers
++ for ehci and ohci.
++
++ If unsure, say N.
+--- a/drivers/usb/host/Makefile
++++ b/drivers/usb/host/Makefile
+@@ -38,3 +38,4 @@ obj-$(CONFIG_USB_FSL_MPH_DR_OF) += fsl-m
+ obj-$(CONFIG_USB_OCTEON2_COMMON) += octeon2-common.o
+ obj-$(CONFIG_MIPS_ALCHEMY) += alchemy-common.o
+ obj-$(CONFIG_USB_HCD_BCMA) += bcma-hcd.o
++obj-$(CONFIG_USB_HCD_SSB) += ssb-hcd.o
+--- /dev/null
++++ b/drivers/usb/host/ssb-hcd.c
+@@ -0,0 +1,279 @@
++/*
++ * Sonics Silicon Backplane
++ * Broadcom USB-core driver (SSB bus glue)
++ *
++ * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
++ *
++ * Based on ssb-ohci driver
++ * Copyright 2007 Michael Buesch <m@bues.ch>
++ *
++ * 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 2005-2011 Broadcom Corporation
++ *
++ * Licensed under the GNU/GPL. See COPYING for details.
++ */
++#include <linux/ssb/ssb.h>
++#include <linux/delay.h>
++#include <linux/platform_device.h>
++#include <linux/module.h>
++#include <linux/usb/ehci_pdriver.h>
++#include <linux/usb/ohci_pdriver.h>
++
++MODULE_AUTHOR("Hauke Mehrtens");
++MODULE_DESCRIPTION("Common USB driver for SSB Bus");
++MODULE_LICENSE("GPL");
++
++#define SSB_HCD_TMSLOW_HOSTMODE (1 << 29)
++
++struct ssb_hcd_device {
++ struct platform_device *ehci_dev;
++ struct platform_device *ohci_dev;
++
++ u32 enable_flags;
++};
++
++static void __devinit ssb_hcd_5354wa(struct ssb_device *dev)
++{
++#ifdef CONFIG_SSB_DRIVER_MIPS
++ /* Work around for 5354 failures */
++ if (dev->id.revision == 2 && dev->bus->chip_id == 0x5354) {
++ /* Change syn01 reg */
++ ssb_write32(dev, 0x894, 0x00fe00fe);
++
++ /* Change syn03 reg */
++ ssb_write32(dev, 0x89c, ssb_read32(dev, 0x89c) | 0x1);
++ }
++#endif
++}
++
++static void __devinit ssb_hcd_usb20wa(struct ssb_device *dev)
++{
++ if (dev->id.coreid == SSB_DEV_USB20_HOST) {
++ /*
++ * 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_write32(dev, 0x200, 0x7ff);
++
++ /* Change Flush control reg */
++ ssb_write32(dev, 0x400, ssb_read32(dev, 0x400) & ~8);
++ ssb_read32(dev, 0x400);
++
++ /* Change Shim control reg */
++ ssb_write32(dev, 0x304, ssb_read32(dev, 0x304) & ~0x100);
++ ssb_read32(dev, 0x304);
++
++ udelay(1);
++
++ ssb_hcd_5354wa(dev);
++ }
++}
++
++/* based on arch/mips/brcm-boards/bcm947xx/pcibios.c */
++static u32 __devinit ssb_hcd_init_chip(struct ssb_device *dev)
++{
++ u32 flags = 0;
++
++ if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV)
++ /* Put the device into host-mode. */
++ flags |= SSB_HCD_TMSLOW_HOSTMODE;
++
++ ssb_device_enable(dev, flags);
++
++ ssb_hcd_usb20wa(dev);
++
++ return flags;
++}
++
++static const struct usb_ehci_pdata ehci_pdata = {
++};
++
++static const struct usb_ohci_pdata ohci_pdata = {
++};
++
++static struct platform_device * __devinit
++ssb_hcd_create_pdev(struct ssb_device *dev, bool ohci, u32 addr, u32 len)
++{
++ struct platform_device *hci_dev;
++ struct resource hci_res[2];
++ int ret = -ENOMEM;
++
++ memset(hci_res, 0, sizeof(hci_res));
++
++ hci_res[0].start = addr;
++ hci_res[0].end = hci_res[0].start + len - 1;
++ hci_res[0].flags = IORESOURCE_MEM;
++
++ hci_res[1].start = dev->irq;
++ hci_res[1].flags = IORESOURCE_IRQ;
++
++ hci_dev = platform_device_alloc(ohci ? "ohci-platform" :
++ "ehci-platform" , 0);
++ if (!hci_dev)
++ return NULL;
++
++ hci_dev->dev.parent = dev->dev;
++ hci_dev->dev.dma_mask = &hci_dev->dev.coherent_dma_mask;
++
++ ret = platform_device_add_resources(hci_dev, hci_res,
++ ARRAY_SIZE(hci_res));
++ if (ret)
++ goto err_alloc;
++ if (ohci)
++ ret = platform_device_add_data(hci_dev, &ohci_pdata,
++ sizeof(ohci_pdata));
++ else
++ ret = platform_device_add_data(hci_dev, &ehci_pdata,
++ sizeof(ehci_pdata));
++ if (ret)
++ goto err_alloc;
++ ret = platform_device_add(hci_dev);
++ if (ret)
++ goto err_alloc;
++
++ return hci_dev;
++
++err_alloc:
++ platform_device_put(hci_dev);
++ return ERR_PTR(ret);
++}
++
++static int __devinit ssb_hcd_probe(struct ssb_device *dev,
++ const struct ssb_device_id *id)
++{
++ int err, tmp;
++ int start, len;
++ u16 chipid_top;
++ u16 coreid = dev->id.coreid;
++ struct ssb_hcd_device *usb_dev;
++
++ /* 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 (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) ||
++ dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32)))
++ return -EOPNOTSUPP;
++
++ usb_dev = kzalloc(sizeof(struct ssb_hcd_device), GFP_KERNEL);
++ if (!usb_dev)
++ return -ENOMEM;
++
++ /* We currently always attach SSB_DEV_USB11_HOSTDEV
++ * as HOST OHCI. If we want to attach it as Client device,
++ * we must branch here and call into the (yet to
++ * be written) Client mode driver. Same for remove(). */
++ usb_dev->enable_flags = ssb_hcd_init_chip(dev);
++
++ tmp = ssb_read32(dev, SSB_ADMATCH0);
++
++ start = ssb_admatch_base(tmp);
++ len = (coreid == SSB_DEV_USB20_HOST) ? 0x800 : ssb_admatch_size(tmp);
++ usb_dev->ohci_dev = ssb_hcd_create_pdev(dev, true, start, len);
++ if (IS_ERR(usb_dev->ohci_dev)) {
++ err = PTR_ERR(usb_dev->ohci_dev);
++ goto err_free_usb_dev;
++ }
++
++ if (coreid == SSB_DEV_USB20_HOST) {
++ start = ssb_admatch_base(tmp) + 0x800; /* ehci core offset */
++ usb_dev->ehci_dev = ssb_hcd_create_pdev(dev, false, start, len);
++ if (IS_ERR(usb_dev->ehci_dev)) {
++ err = PTR_ERR(usb_dev->ehci_dev);
++ goto err_unregister_ohci_dev;
++ }
++ }
++
++ ssb_set_drvdata(dev, usb_dev);
++ return 0;
++
++err_unregister_ohci_dev:
++ platform_device_unregister(usb_dev->ohci_dev);
++err_free_usb_dev:
++ kfree(usb_dev);
++ return err;
++}
++
++static void __devexit ssb_hcd_remove(struct ssb_device *dev)
++{
++ struct ssb_hcd_device *usb_dev = ssb_get_drvdata(dev);
++ struct platform_device *ohci_dev = usb_dev->ohci_dev;
++ struct platform_device *ehci_dev = usb_dev->ehci_dev;
++
++ if (ohci_dev)
++ platform_device_unregister(ohci_dev);
++ if (ehci_dev)
++ platform_device_unregister(ehci_dev);
++
++ ssb_device_disable(dev, 0);
++}
++
++static void __devexit ssb_hcd_shutdown(struct ssb_device *dev)
++{
++ ssb_device_disable(dev, 0);
++}
++
++#ifdef CONFIG_PM
++
++static int ssb_hcd_suspend(struct ssb_device *dev, pm_message_t state)
++{
++ ssb_device_disable(dev, 0);
++
++ return 0;
++}
++
++static int ssb_hcd_resume(struct ssb_device *dev)
++{
++ struct ssb_hcd_device *usb_dev = ssb_get_drvdata(dev);
++
++ ssb_device_enable(dev, usb_dev->enable_flags);
++
++ return 0;
++}
++
++#else /* !CONFIG_PM */
++#define ssb_hcd_suspend NULL
++#define ssb_hcd_resume NULL
++#endif /* CONFIG_PM */
++
++static const struct ssb_device_id ssb_hcd_table[] __devinitconst = {
++ SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOSTDEV, SSB_ANY_REV),
++ SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOST, SSB_ANY_REV),
++ SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV),
++ SSB_DEVTABLE_END
++};
++MODULE_DEVICE_TABLE(ssb, ssb_hcd_table);
++
++static struct ssb_driver ssb_hcd_driver = {
++ .name = KBUILD_MODNAME,
++ .id_table = ssb_hcd_table,
++ .probe = ssb_hcd_probe,
++ .remove = __devexit_p(ssb_hcd_remove),
++ .shutdown = ssb_hcd_shutdown,
++ .suspend = ssb_hcd_suspend,
++ .resume = ssb_hcd_resume,
++};
++
++static int __init ssb_hcd_init(void)
++{
++ return ssb_driver_register(&ssb_hcd_driver);
++}
++module_init(ssb_hcd_init);
++
++static void __exit ssb_hcd_exit(void)
++{
++ ssb_driver_unregister(&ssb_hcd_driver);
++}
++module_exit(ssb_hcd_exit);
projects / openwrt.git / blobdiff