17043c2ccSHauke Mehrtens /* 27043c2ccSHauke Mehrtens * Sonics Silicon Backplane 37043c2ccSHauke Mehrtens * Broadcom USB-core driver (SSB bus glue) 47043c2ccSHauke Mehrtens * 57043c2ccSHauke Mehrtens * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de> 67043c2ccSHauke Mehrtens * 77043c2ccSHauke Mehrtens * Based on ssb-ohci driver 87043c2ccSHauke Mehrtens * Copyright 2007 Michael Buesch <m@bues.ch> 97043c2ccSHauke Mehrtens * 107043c2ccSHauke Mehrtens * Derived from the OHCI-PCI driver 117043c2ccSHauke Mehrtens * Copyright 1999 Roman Weissgaerber 127043c2ccSHauke Mehrtens * Copyright 2000-2002 David Brownell 137043c2ccSHauke Mehrtens * Copyright 1999 Linus Torvalds 147043c2ccSHauke Mehrtens * Copyright 1999 Gregory P. Smith 157043c2ccSHauke Mehrtens * 167043c2ccSHauke Mehrtens * Derived from the USBcore related parts of Broadcom-SB 177043c2ccSHauke Mehrtens * Copyright 2005-2011 Broadcom Corporation 187043c2ccSHauke Mehrtens * 197043c2ccSHauke Mehrtens * Licensed under the GNU/GPL. See COPYING for details. 207043c2ccSHauke Mehrtens */ 217043c2ccSHauke Mehrtens #include <linux/ssb/ssb.h> 227043c2ccSHauke Mehrtens #include <linux/delay.h> 237043c2ccSHauke Mehrtens #include <linux/platform_device.h> 247043c2ccSHauke Mehrtens #include <linux/module.h> 254627b1eaSGeert Uytterhoeven #include <linux/slab.h> 267043c2ccSHauke Mehrtens #include <linux/usb/ehci_pdriver.h> 277043c2ccSHauke Mehrtens #include <linux/usb/ohci_pdriver.h> 287043c2ccSHauke Mehrtens 297043c2ccSHauke Mehrtens MODULE_AUTHOR("Hauke Mehrtens"); 307043c2ccSHauke Mehrtens MODULE_DESCRIPTION("Common USB driver for SSB Bus"); 317043c2ccSHauke Mehrtens MODULE_LICENSE("GPL"); 327043c2ccSHauke Mehrtens 337043c2ccSHauke Mehrtens #define SSB_HCD_TMSLOW_HOSTMODE (1 << 29) 347043c2ccSHauke Mehrtens 357043c2ccSHauke Mehrtens struct ssb_hcd_device { 367043c2ccSHauke Mehrtens struct platform_device *ehci_dev; 377043c2ccSHauke Mehrtens struct platform_device *ohci_dev; 387043c2ccSHauke Mehrtens 397043c2ccSHauke Mehrtens u32 enable_flags; 407043c2ccSHauke Mehrtens }; 417043c2ccSHauke Mehrtens 427043c2ccSHauke Mehrtens static void __devinit ssb_hcd_5354wa(struct ssb_device *dev) 437043c2ccSHauke Mehrtens { 447043c2ccSHauke Mehrtens #ifdef CONFIG_SSB_DRIVER_MIPS 457043c2ccSHauke Mehrtens /* Work around for 5354 failures */ 467043c2ccSHauke Mehrtens if (dev->id.revision == 2 && dev->bus->chip_id == 0x5354) { 477043c2ccSHauke Mehrtens /* Change syn01 reg */ 487043c2ccSHauke Mehrtens ssb_write32(dev, 0x894, 0x00fe00fe); 497043c2ccSHauke Mehrtens 507043c2ccSHauke Mehrtens /* Change syn03 reg */ 517043c2ccSHauke Mehrtens ssb_write32(dev, 0x89c, ssb_read32(dev, 0x89c) | 0x1); 527043c2ccSHauke Mehrtens } 537043c2ccSHauke Mehrtens #endif 547043c2ccSHauke Mehrtens } 557043c2ccSHauke Mehrtens 567043c2ccSHauke Mehrtens static void __devinit ssb_hcd_usb20wa(struct ssb_device *dev) 577043c2ccSHauke Mehrtens { 587043c2ccSHauke Mehrtens if (dev->id.coreid == SSB_DEV_USB20_HOST) { 597043c2ccSHauke Mehrtens /* 607043c2ccSHauke Mehrtens * USB 2.0 special considerations: 617043c2ccSHauke Mehrtens * 627043c2ccSHauke Mehrtens * In addition to the standard SSB reset sequence, the Host 637043c2ccSHauke Mehrtens * Control Register must be programmed to bring the USB core 647043c2ccSHauke Mehrtens * and various phy components out of reset. 657043c2ccSHauke Mehrtens */ 667043c2ccSHauke Mehrtens ssb_write32(dev, 0x200, 0x7ff); 677043c2ccSHauke Mehrtens 687043c2ccSHauke Mehrtens /* Change Flush control reg */ 697043c2ccSHauke Mehrtens ssb_write32(dev, 0x400, ssb_read32(dev, 0x400) & ~8); 707043c2ccSHauke Mehrtens ssb_read32(dev, 0x400); 717043c2ccSHauke Mehrtens 727043c2ccSHauke Mehrtens /* Change Shim control reg */ 737043c2ccSHauke Mehrtens ssb_write32(dev, 0x304, ssb_read32(dev, 0x304) & ~0x100); 747043c2ccSHauke Mehrtens ssb_read32(dev, 0x304); 757043c2ccSHauke Mehrtens 767043c2ccSHauke Mehrtens udelay(1); 777043c2ccSHauke Mehrtens 787043c2ccSHauke Mehrtens ssb_hcd_5354wa(dev); 797043c2ccSHauke Mehrtens } 807043c2ccSHauke Mehrtens } 817043c2ccSHauke Mehrtens 827043c2ccSHauke Mehrtens /* based on arch/mips/brcm-boards/bcm947xx/pcibios.c */ 837043c2ccSHauke Mehrtens static u32 __devinit ssb_hcd_init_chip(struct ssb_device *dev) 847043c2ccSHauke Mehrtens { 857043c2ccSHauke Mehrtens u32 flags = 0; 867043c2ccSHauke Mehrtens 877043c2ccSHauke Mehrtens if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV) 887043c2ccSHauke Mehrtens /* Put the device into host-mode. */ 897043c2ccSHauke Mehrtens flags |= SSB_HCD_TMSLOW_HOSTMODE; 907043c2ccSHauke Mehrtens 917043c2ccSHauke Mehrtens ssb_device_enable(dev, flags); 927043c2ccSHauke Mehrtens 937043c2ccSHauke Mehrtens ssb_hcd_usb20wa(dev); 947043c2ccSHauke Mehrtens 957043c2ccSHauke Mehrtens return flags; 967043c2ccSHauke Mehrtens } 977043c2ccSHauke Mehrtens 987043c2ccSHauke Mehrtens static const struct usb_ehci_pdata ehci_pdata = { 997043c2ccSHauke Mehrtens }; 1007043c2ccSHauke Mehrtens 1017043c2ccSHauke Mehrtens static const struct usb_ohci_pdata ohci_pdata = { 1027043c2ccSHauke Mehrtens }; 1037043c2ccSHauke Mehrtens 1047043c2ccSHauke Mehrtens static struct platform_device * __devinit 1057043c2ccSHauke Mehrtens ssb_hcd_create_pdev(struct ssb_device *dev, bool ohci, u32 addr, u32 len) 1067043c2ccSHauke Mehrtens { 1077043c2ccSHauke Mehrtens struct platform_device *hci_dev; 1087043c2ccSHauke Mehrtens struct resource hci_res[2]; 1097043c2ccSHauke Mehrtens int ret = -ENOMEM; 1107043c2ccSHauke Mehrtens 1117043c2ccSHauke Mehrtens memset(hci_res, 0, sizeof(hci_res)); 1127043c2ccSHauke Mehrtens 1137043c2ccSHauke Mehrtens hci_res[0].start = addr; 1147043c2ccSHauke Mehrtens hci_res[0].end = hci_res[0].start + len - 1; 1157043c2ccSHauke Mehrtens hci_res[0].flags = IORESOURCE_MEM; 1167043c2ccSHauke Mehrtens 1177043c2ccSHauke Mehrtens hci_res[1].start = dev->irq; 1187043c2ccSHauke Mehrtens hci_res[1].flags = IORESOURCE_IRQ; 1197043c2ccSHauke Mehrtens 1207043c2ccSHauke Mehrtens hci_dev = platform_device_alloc(ohci ? "ohci-platform" : 1217043c2ccSHauke Mehrtens "ehci-platform" , 0); 1227043c2ccSHauke Mehrtens if (!hci_dev) 1237043c2ccSHauke Mehrtens return NULL; 1247043c2ccSHauke Mehrtens 1257043c2ccSHauke Mehrtens hci_dev->dev.parent = dev->dev; 1267043c2ccSHauke Mehrtens hci_dev->dev.dma_mask = &hci_dev->dev.coherent_dma_mask; 1277043c2ccSHauke Mehrtens 1287043c2ccSHauke Mehrtens ret = platform_device_add_resources(hci_dev, hci_res, 1297043c2ccSHauke Mehrtens ARRAY_SIZE(hci_res)); 1307043c2ccSHauke Mehrtens if (ret) 1317043c2ccSHauke Mehrtens goto err_alloc; 1327043c2ccSHauke Mehrtens if (ohci) 1337043c2ccSHauke Mehrtens ret = platform_device_add_data(hci_dev, &ohci_pdata, 1347043c2ccSHauke Mehrtens sizeof(ohci_pdata)); 1357043c2ccSHauke Mehrtens else 1367043c2ccSHauke Mehrtens ret = platform_device_add_data(hci_dev, &ehci_pdata, 1377043c2ccSHauke Mehrtens sizeof(ehci_pdata)); 1387043c2ccSHauke Mehrtens if (ret) 1397043c2ccSHauke Mehrtens goto err_alloc; 1407043c2ccSHauke Mehrtens ret = platform_device_add(hci_dev); 1417043c2ccSHauke Mehrtens if (ret) 1427043c2ccSHauke Mehrtens goto err_alloc; 1437043c2ccSHauke Mehrtens 1447043c2ccSHauke Mehrtens return hci_dev; 1457043c2ccSHauke Mehrtens 1467043c2ccSHauke Mehrtens err_alloc: 1477043c2ccSHauke Mehrtens platform_device_put(hci_dev); 1487043c2ccSHauke Mehrtens return ERR_PTR(ret); 1497043c2ccSHauke Mehrtens } 1507043c2ccSHauke Mehrtens 1517043c2ccSHauke Mehrtens static int __devinit ssb_hcd_probe(struct ssb_device *dev, 1527043c2ccSHauke Mehrtens const struct ssb_device_id *id) 1537043c2ccSHauke Mehrtens { 1547043c2ccSHauke Mehrtens int err, tmp; 1557043c2ccSHauke Mehrtens int start, len; 1567043c2ccSHauke Mehrtens u16 chipid_top; 1577043c2ccSHauke Mehrtens u16 coreid = dev->id.coreid; 1587043c2ccSHauke Mehrtens struct ssb_hcd_device *usb_dev; 1597043c2ccSHauke Mehrtens 1607043c2ccSHauke Mehrtens /* USBcores are only connected on embedded devices. */ 1617043c2ccSHauke Mehrtens chipid_top = (dev->bus->chip_id & 0xFF00); 1627043c2ccSHauke Mehrtens if (chipid_top != 0x4700 && chipid_top != 0x5300) 1637043c2ccSHauke Mehrtens return -ENODEV; 1647043c2ccSHauke Mehrtens 1657043c2ccSHauke Mehrtens /* TODO: Probably need checks here; is the core connected? */ 1667043c2ccSHauke Mehrtens 1677043c2ccSHauke Mehrtens if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) || 1687043c2ccSHauke Mehrtens dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32))) 1697043c2ccSHauke Mehrtens return -EOPNOTSUPP; 1707043c2ccSHauke Mehrtens 1717043c2ccSHauke Mehrtens usb_dev = kzalloc(sizeof(struct ssb_hcd_device), GFP_KERNEL); 1727043c2ccSHauke Mehrtens if (!usb_dev) 1737043c2ccSHauke Mehrtens return -ENOMEM; 1747043c2ccSHauke Mehrtens 1757043c2ccSHauke Mehrtens /* We currently always attach SSB_DEV_USB11_HOSTDEV 1767043c2ccSHauke Mehrtens * as HOST OHCI. If we want to attach it as Client device, 1777043c2ccSHauke Mehrtens * we must branch here and call into the (yet to 1787043c2ccSHauke Mehrtens * be written) Client mode driver. Same for remove(). */ 1797043c2ccSHauke Mehrtens usb_dev->enable_flags = ssb_hcd_init_chip(dev); 1807043c2ccSHauke Mehrtens 1817043c2ccSHauke Mehrtens tmp = ssb_read32(dev, SSB_ADMATCH0); 1827043c2ccSHauke Mehrtens 1837043c2ccSHauke Mehrtens start = ssb_admatch_base(tmp); 1847043c2ccSHauke Mehrtens len = (coreid == SSB_DEV_USB20_HOST) ? 0x800 : ssb_admatch_size(tmp); 1857043c2ccSHauke Mehrtens usb_dev->ohci_dev = ssb_hcd_create_pdev(dev, true, start, len); 1867043c2ccSHauke Mehrtens if (IS_ERR(usb_dev->ohci_dev)) { 1877043c2ccSHauke Mehrtens err = PTR_ERR(usb_dev->ohci_dev); 1887043c2ccSHauke Mehrtens goto err_free_usb_dev; 1897043c2ccSHauke Mehrtens } 1907043c2ccSHauke Mehrtens 1917043c2ccSHauke Mehrtens if (coreid == SSB_DEV_USB20_HOST) { 1927043c2ccSHauke Mehrtens start = ssb_admatch_base(tmp) + 0x800; /* ehci core offset */ 1937043c2ccSHauke Mehrtens usb_dev->ehci_dev = ssb_hcd_create_pdev(dev, false, start, len); 1947043c2ccSHauke Mehrtens if (IS_ERR(usb_dev->ehci_dev)) { 1957043c2ccSHauke Mehrtens err = PTR_ERR(usb_dev->ehci_dev); 1967043c2ccSHauke Mehrtens goto err_unregister_ohci_dev; 1977043c2ccSHauke Mehrtens } 1987043c2ccSHauke Mehrtens } 1997043c2ccSHauke Mehrtens 2007043c2ccSHauke Mehrtens ssb_set_drvdata(dev, usb_dev); 2017043c2ccSHauke Mehrtens return 0; 2027043c2ccSHauke Mehrtens 2037043c2ccSHauke Mehrtens err_unregister_ohci_dev: 2047043c2ccSHauke Mehrtens platform_device_unregister(usb_dev->ohci_dev); 2057043c2ccSHauke Mehrtens err_free_usb_dev: 2067043c2ccSHauke Mehrtens kfree(usb_dev); 2077043c2ccSHauke Mehrtens return err; 2087043c2ccSHauke Mehrtens } 2097043c2ccSHauke Mehrtens 2107043c2ccSHauke Mehrtens static void __devexit ssb_hcd_remove(struct ssb_device *dev) 2117043c2ccSHauke Mehrtens { 2127043c2ccSHauke Mehrtens struct ssb_hcd_device *usb_dev = ssb_get_drvdata(dev); 2137043c2ccSHauke Mehrtens struct platform_device *ohci_dev = usb_dev->ohci_dev; 2147043c2ccSHauke Mehrtens struct platform_device *ehci_dev = usb_dev->ehci_dev; 2157043c2ccSHauke Mehrtens 2167043c2ccSHauke Mehrtens if (ohci_dev) 2177043c2ccSHauke Mehrtens platform_device_unregister(ohci_dev); 2187043c2ccSHauke Mehrtens if (ehci_dev) 2197043c2ccSHauke Mehrtens platform_device_unregister(ehci_dev); 2207043c2ccSHauke Mehrtens 2217043c2ccSHauke Mehrtens ssb_device_disable(dev, 0); 2227043c2ccSHauke Mehrtens } 2237043c2ccSHauke Mehrtens 2247043c2ccSHauke Mehrtens static void __devexit ssb_hcd_shutdown(struct ssb_device *dev) 2257043c2ccSHauke Mehrtens { 2267043c2ccSHauke Mehrtens ssb_device_disable(dev, 0); 2277043c2ccSHauke Mehrtens } 2287043c2ccSHauke Mehrtens 2297043c2ccSHauke Mehrtens #ifdef CONFIG_PM 2307043c2ccSHauke Mehrtens 2317043c2ccSHauke Mehrtens static int ssb_hcd_suspend(struct ssb_device *dev, pm_message_t state) 2327043c2ccSHauke Mehrtens { 2337043c2ccSHauke Mehrtens ssb_device_disable(dev, 0); 2347043c2ccSHauke Mehrtens 2357043c2ccSHauke Mehrtens return 0; 2367043c2ccSHauke Mehrtens } 2377043c2ccSHauke Mehrtens 2387043c2ccSHauke Mehrtens static int ssb_hcd_resume(struct ssb_device *dev) 2397043c2ccSHauke Mehrtens { 2407043c2ccSHauke Mehrtens struct ssb_hcd_device *usb_dev = ssb_get_drvdata(dev); 2417043c2ccSHauke Mehrtens 2427043c2ccSHauke Mehrtens ssb_device_enable(dev, usb_dev->enable_flags); 2437043c2ccSHauke Mehrtens 2447043c2ccSHauke Mehrtens return 0; 2457043c2ccSHauke Mehrtens } 2467043c2ccSHauke Mehrtens 2477043c2ccSHauke Mehrtens #else /* !CONFIG_PM */ 2487043c2ccSHauke Mehrtens #define ssb_hcd_suspend NULL 2497043c2ccSHauke Mehrtens #define ssb_hcd_resume NULL 2507043c2ccSHauke Mehrtens #endif /* CONFIG_PM */ 2517043c2ccSHauke Mehrtens 2527043c2ccSHauke Mehrtens static const struct ssb_device_id ssb_hcd_table[] __devinitconst = { 2537043c2ccSHauke Mehrtens SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOSTDEV, SSB_ANY_REV), 2547043c2ccSHauke Mehrtens SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOST, SSB_ANY_REV), 2557043c2ccSHauke Mehrtens SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV), 2567043c2ccSHauke Mehrtens SSB_DEVTABLE_END 2577043c2ccSHauke Mehrtens }; 2587043c2ccSHauke Mehrtens MODULE_DEVICE_TABLE(ssb, ssb_hcd_table); 2597043c2ccSHauke Mehrtens 2607043c2ccSHauke Mehrtens static struct ssb_driver ssb_hcd_driver = { 2617043c2ccSHauke Mehrtens .name = KBUILD_MODNAME, 2627043c2ccSHauke Mehrtens .id_table = ssb_hcd_table, 2637043c2ccSHauke Mehrtens .probe = ssb_hcd_probe, 2647690417dSBill Pemberton .remove = ssb_hcd_remove, 2657043c2ccSHauke Mehrtens .shutdown = ssb_hcd_shutdown, 2667043c2ccSHauke Mehrtens .suspend = ssb_hcd_suspend, 2677043c2ccSHauke Mehrtens .resume = ssb_hcd_resume, 2687043c2ccSHauke Mehrtens }; 2697043c2ccSHauke Mehrtens 2707043c2ccSHauke Mehrtens static int __init ssb_hcd_init(void) 2717043c2ccSHauke Mehrtens { 2727043c2ccSHauke Mehrtens return ssb_driver_register(&ssb_hcd_driver); 2737043c2ccSHauke Mehrtens } 2747043c2ccSHauke Mehrtens module_init(ssb_hcd_init); 2757043c2ccSHauke Mehrtens 2767043c2ccSHauke Mehrtens static void __exit ssb_hcd_exit(void) 2777043c2ccSHauke Mehrtens { 2787043c2ccSHauke Mehrtens ssb_driver_unregister(&ssb_hcd_driver); 2797043c2ccSHauke Mehrtens } 2807043c2ccSHauke Mehrtens module_exit(ssb_hcd_exit); 281