/* * Sonics Silicon Backplane * Broadcom USB-core 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 Broadcom Corporation * * Licensed under the GNU/GPL. See COPYING for details. */ #include <linux/ssb/ssb.h> #define SSB_OHCI_TMSLOW_HOSTMODE (1 << 29) struct ssb_ohci_device { struct ohci_hcd ohci; /* _must_ be at the beginning. */ u32 enable_flags; }; static inline struct ssb_ohci_device *hcd_to_ssb_ohci(struct usb_hcd *hcd) { return (struct ssb_ohci_device *)(hcd->hcd_priv); } static int ssb_ohci_reset(struct usb_hcd *hcd) { struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd); struct ohci_hcd *ohci = &ohcidev->ohci; int err; ohci_hcd_init(ohci); err = ohci_init(ohci); return err; } static int ssb_ohci_start(struct usb_hcd *hcd) { struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd); struct ohci_hcd *ohci = &ohcidev->ohci; int err; err = ohci_run(ohci); if (err < 0) { ohci_err(ohci, "can't start\n"); ohci_stop(hcd); } return err; } static const struct hc_driver ssb_ohci_hc_driver = { .description = "ssb-usb-ohci", .product_desc = "SSB OHCI Controller", .hcd_priv_size = sizeof(struct ssb_ohci_device), .irq = ohci_irq, .flags = HCD_MEMORY | HCD_USB11, .reset = ssb_ohci_reset, .start = ssb_ohci_start, .stop = ohci_stop, .shutdown = ohci_shutdown, .urb_enqueue = ohci_urb_enqueue, .urb_dequeue = ohci_urb_dequeue, .endpoint_disable = ohci_endpoint_disable, .get_frame_number = ohci_get_frame, .hub_status_data = ohci_hub_status_data, .hub_control = ohci_hub_control, #ifdef CONFIG_PM .bus_suspend = ohci_bus_suspend, .bus_resume = ohci_bus_resume, #endif .start_port_reset = ohci_start_port_reset, }; static void ssb_ohci_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_ohci_attach(struct ssb_device *dev) { struct ssb_ohci_device *ohcidev; struct usb_hcd *hcd; int err = -ENOMEM; u32 tmp, flags = 0; if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) || dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32))) return -EOPNOTSUPP; if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV) { /* Put the device into host-mode. */ flags |= SSB_OHCI_TMSLOW_HOSTMODE; ssb_device_enable(dev, flags); } else 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_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); } } else ssb_device_enable(dev, 0); hcd = usb_create_hcd(&ssb_ohci_hc_driver, dev->dev, dev_name(dev->dev)); if (!hcd) goto err_dev_disable; ohcidev = hcd_to_ssb_ohci(hcd); ohcidev->enable_flags = flags; tmp = ssb_read32(dev, SSB_ADMATCH0); hcd->rsrc_start = ssb_admatch_base(tmp); hcd->rsrc_len = ssb_admatch_size(tmp); 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_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, flags); return err; } static int ssb_ohci_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; /* 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(). */ err = ssb_ohci_attach(dev); return err; } static void ssb_ohci_remove(struct ssb_device *dev) { ssb_ohci_detach(dev); } #ifdef CONFIG_PM static int ssb_ohci_suspend(struct ssb_device *dev, pm_message_t state) { ssb_device_disable(dev, 0); return 0; } static int ssb_ohci_resume(struct ssb_device *dev) { struct usb_hcd *hcd = ssb_get_drvdata(dev); struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd); ssb_device_enable(dev, ohcidev->enable_flags); ohci_finish_controller_resume(hcd); return 0; } #else /* !CONFIG_PM */ #define ssb_ohci_suspend NULL #define ssb_ohci_resume NULL #endif /* CONFIG_PM */ static const struct ssb_device_id ssb_ohci_table[] = { 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_ohci_table); static struct ssb_driver ssb_ohci_driver = { .name = KBUILD_MODNAME, .id_table = ssb_ohci_table, .probe = ssb_ohci_probe, .remove = ssb_ohci_remove, .suspend = ssb_ohci_suspend, .resume = ssb_ohci_resume, };