+++ /dev/null
-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
-@@ -153,6 +153,19 @@ 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
-@@ -1197,9 +1197,14 @@ MODULE_LICENSE ("GPL");
- #define PLATFORM_DRIVER ehci_atmel_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
-
-@@ -1259,10 +1264,20 @@ 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
-@@ -1293,6 +1308,9 @@ 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,
-+};
projects / openwrt / svn-archive / archive.git / blobdiff