diff options
Diffstat (limited to 'target/linux/brcm47xx/patches-3.2/0033-USB-Add-driver-for-the-ssb-bus.patch')
| -rw-r--r-- | target/linux/brcm47xx/patches-3.2/0033-USB-Add-driver-for-the-ssb-bus.patch | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.2/0033-USB-Add-driver-for-the-ssb-bus.patch b/target/linux/brcm47xx/patches-3.2/0033-USB-Add-driver-for-the-ssb-bus.patch new file mode 100644 index 0000000000..f03657d126 --- /dev/null +++ b/target/linux/brcm47xx/patches-3.2/0033-USB-Add-driver-for-the-ssb-bus.patch @@ -0,0 +1,325 @@ +From ca1db834336ac19edc7a5d342f8acece1ae1feb9 Mon Sep 17 00:00:00 2001 +From: Hauke Mehrtens <hauke@hauke-m.de> +Date: Sat, 26 Nov 2011 21:35:17 +0100 +Subject: [PATCH 20/30] USB: Add driver for the ssb bus + +This adds a USB driver using the generic platform device driver for the +USB controller found on the Broadcom ssb bus. The ssb bus just +exposes one device which serves the OHCI and the EHCI controller at the +same time. This driver probes for this USB controller and creates and +registers two new platform devices which will be probed by the new +generic platform device driver. This makes it possible to use the EHCI +and the OCHI controller on the ssb bus at the same time. + +The old ssb OHCI USB driver will be removed in the next step as this +driver also provide an OHCI driver and an EHCI for the cores supporting +it. + +Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> +--- + drivers/usb/host/Kconfig | 12 ++ + drivers/usb/host/Makefile | 1 + + drivers/usb/host/ssb-hcd.c | 272 ++++++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 285 insertions(+), 0 deletions(-) + create mode 100644 drivers/usb/host/ssb-hcd.c + +--- a/drivers/usb/host/Kconfig ++++ b/drivers/usb/host/Kconfig +@@ -630,3 +630,15 @@ 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 +1,272 @@ ++/* ++ * Sonics Silicon Backplane ++ * Broadcom USB-core driver (SSB bus glue) ++ * ++ * Copyright 2011 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> ++ ++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 struct platform_device * __devinit ++ssb_hcd_create_pdev(struct ssb_device *dev, char *name, 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(name, 0); ++ if (!hci_dev) ++ goto err_alloc; ++ ++ 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, 2); ++ if (ret) ++ goto err_alloc; ++ ++ ret = platform_device_add(hci_dev); ++ if (ret) { ++err_alloc: ++ platform_device_put(hci_dev); ++ return ERR_PTR(ret); ++ } ++ ++ return hci_dev; ++} ++ ++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; ++ 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 = ssb_admatch_size(tmp); ++ usb_dev->ohci_dev = ssb_hcd_create_pdev(dev, "ohci-platform", start, ++ len); ++ if (IS_ERR(usb_dev->ohci_dev)) { ++ err = PTR_ERR(usb_dev->ohci_dev); ++ goto err_free_usb_dev; ++ } ++ ++ if (dev->id.coreid == SSB_DEV_USB20_HOST) { ++ start = ssb_admatch_base(tmp) + 0x800; /* ehci core offset */ ++ len = 0x100; /* ehci reg block size */ ++ usb_dev->ehci_dev = ssb_hcd_create_pdev(dev, "ehci-platform", ++ 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; ++ struct platform_device *ohci_dev; ++ struct platform_device *ehci_dev; ++ ++ usb_dev = ssb_get_drvdata(dev); ++ if (!usb_dev) ++ return; ++ ++ ohci_dev = usb_dev->ohci_dev; ++ 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); |