/* * 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/slab.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 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 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 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 *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; 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 ERR_PTR(-ENOMEM); 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 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_and_coherent(dev->dma_dev, DMA_BIT_MASK(32))) return -EOPNOTSUPP; usb_dev = devm_kzalloc(dev->dev, 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)) return PTR_ERR(usb_dev->ohci_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); return err; } static void 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 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[] = { 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), {}, }; 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 = 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);