260 lines
6 KiB
C
260 lines
6 KiB
C
/*
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* Sonics Silicon Backplane
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* Broadcom USB-core OHCI driver
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*
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* Copyright 2007 Michael Buesch <m@bues.ch>
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*
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* Derived from the OHCI-PCI driver
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* Copyright 1999 Roman Weissgaerber
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* Copyright 2000-2002 David Brownell
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* Copyright 1999 Linus Torvalds
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* Copyright 1999 Gregory P. Smith
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*
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* Derived from the USBcore related parts of Broadcom-SB
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* Copyright 2005 Broadcom Corporation
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*
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* Licensed under the GNU/GPL. See COPYING for details.
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*/
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#include <linux/ssb/ssb.h>
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#define SSB_OHCI_TMSLOW_HOSTMODE (1 << 29)
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struct ssb_ohci_device {
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struct ohci_hcd ohci; /* _must_ be at the beginning. */
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u32 enable_flags;
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};
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static inline
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struct ssb_ohci_device *hcd_to_ssb_ohci(struct usb_hcd *hcd)
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{
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return (struct ssb_ohci_device *)(hcd->hcd_priv);
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}
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static int ssb_ohci_reset(struct usb_hcd *hcd)
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{
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struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
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struct ohci_hcd *ohci = &ohcidev->ohci;
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int err;
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ohci_hcd_init(ohci);
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err = ohci_init(ohci);
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return err;
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}
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static int ssb_ohci_start(struct usb_hcd *hcd)
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{
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struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
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struct ohci_hcd *ohci = &ohcidev->ohci;
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int err;
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err = ohci_run(ohci);
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if (err < 0) {
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ohci_err(ohci, "can't start\n");
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ohci_stop(hcd);
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}
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return err;
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}
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static const struct hc_driver ssb_ohci_hc_driver = {
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.description = "ssb-usb-ohci",
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.product_desc = "SSB OHCI Controller",
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.hcd_priv_size = sizeof(struct ssb_ohci_device),
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.irq = ohci_irq,
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.flags = HCD_MEMORY | HCD_USB11,
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.reset = ssb_ohci_reset,
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.start = ssb_ohci_start,
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.stop = ohci_stop,
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.shutdown = ohci_shutdown,
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.urb_enqueue = ohci_urb_enqueue,
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.urb_dequeue = ohci_urb_dequeue,
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.endpoint_disable = ohci_endpoint_disable,
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.get_frame_number = ohci_get_frame,
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.hub_status_data = ohci_hub_status_data,
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.hub_control = ohci_hub_control,
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#ifdef CONFIG_PM
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.bus_suspend = ohci_bus_suspend,
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.bus_resume = ohci_bus_resume,
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#endif
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.start_port_reset = ohci_start_port_reset,
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};
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static void ssb_ohci_detach(struct ssb_device *dev)
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{
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struct usb_hcd *hcd = ssb_get_drvdata(dev);
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if (hcd->driver->shutdown)
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hcd->driver->shutdown(hcd);
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usb_remove_hcd(hcd);
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iounmap(hcd->regs);
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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ssb_device_disable(dev, 0);
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}
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static int ssb_ohci_attach(struct ssb_device *dev)
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{
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struct ssb_ohci_device *ohcidev;
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struct usb_hcd *hcd;
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int err = -ENOMEM;
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u32 tmp, flags = 0;
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if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) ||
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dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32)))
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return -EOPNOTSUPP;
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if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV) {
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/* Put the device into host-mode. */
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flags |= SSB_OHCI_TMSLOW_HOSTMODE;
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ssb_device_enable(dev, flags);
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} else if (dev->id.coreid == SSB_DEV_USB20_HOST) {
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/*
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* USB 2.0 special considerations:
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*
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* In addition to the standard SSB reset sequence, the Host
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* Control Register must be programmed to bring the USB core
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* and various phy components out of reset.
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*/
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ssb_device_enable(dev, 0);
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ssb_write32(dev, 0x200, 0x7ff);
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/* Change Flush control reg */
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tmp = ssb_read32(dev, 0x400);
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tmp &= ~8;
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ssb_write32(dev, 0x400, tmp);
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tmp = ssb_read32(dev, 0x400);
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/* Change Shim control reg */
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tmp = ssb_read32(dev, 0x304);
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tmp &= ~0x100;
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ssb_write32(dev, 0x304, tmp);
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tmp = ssb_read32(dev, 0x304);
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udelay(1);
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/* Work around for 5354 failures */
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if (dev->id.revision == 2 && dev->bus->chip_id == 0x5354) {
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/* Change syn01 reg */
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tmp = 0x00fe00fe;
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ssb_write32(dev, 0x894, tmp);
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/* Change syn03 reg */
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tmp = ssb_read32(dev, 0x89c);
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tmp |= 0x1;
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ssb_write32(dev, 0x89c, tmp);
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}
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} else
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ssb_device_enable(dev, 0);
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hcd = usb_create_hcd(&ssb_ohci_hc_driver, dev->dev,
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dev_name(dev->dev));
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if (!hcd)
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goto err_dev_disable;
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ohcidev = hcd_to_ssb_ohci(hcd);
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ohcidev->enable_flags = flags;
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tmp = ssb_read32(dev, SSB_ADMATCH0);
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hcd->rsrc_start = ssb_admatch_base(tmp);
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hcd->rsrc_len = ssb_admatch_size(tmp);
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hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
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if (!hcd->regs)
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goto err_put_hcd;
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err = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
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if (err)
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goto err_iounmap;
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ssb_set_drvdata(dev, hcd);
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return err;
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err_iounmap:
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iounmap(hcd->regs);
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err_put_hcd:
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usb_put_hcd(hcd);
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err_dev_disable:
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ssb_device_disable(dev, flags);
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return err;
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}
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static int ssb_ohci_probe(struct ssb_device *dev,
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const struct ssb_device_id *id)
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{
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int err;
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u16 chipid_top;
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/* USBcores are only connected on embedded devices. */
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chipid_top = (dev->bus->chip_id & 0xFF00);
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if (chipid_top != 0x4700 && chipid_top != 0x5300)
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return -ENODEV;
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/* TODO: Probably need checks here; is the core connected? */
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if (usb_disabled())
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return -ENODEV;
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/* We currently always attach SSB_DEV_USB11_HOSTDEV
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* as HOST OHCI. If we want to attach it as Client device,
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* we must branch here and call into the (yet to
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* be written) Client mode driver. Same for remove(). */
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err = ssb_ohci_attach(dev);
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return err;
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}
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static void ssb_ohci_remove(struct ssb_device *dev)
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{
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ssb_ohci_detach(dev);
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}
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#ifdef CONFIG_PM
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static int ssb_ohci_suspend(struct ssb_device *dev, pm_message_t state)
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{
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ssb_device_disable(dev, 0);
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return 0;
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}
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static int ssb_ohci_resume(struct ssb_device *dev)
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{
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struct usb_hcd *hcd = ssb_get_drvdata(dev);
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struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
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ssb_device_enable(dev, ohcidev->enable_flags);
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ohci_finish_controller_resume(hcd);
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return 0;
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}
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#else /* !CONFIG_PM */
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#define ssb_ohci_suspend NULL
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#define ssb_ohci_resume NULL
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#endif /* CONFIG_PM */
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static const struct ssb_device_id ssb_ohci_table[] = {
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SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOSTDEV, SSB_ANY_REV),
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SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOST, SSB_ANY_REV),
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SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV),
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SSB_DEVTABLE_END
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};
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MODULE_DEVICE_TABLE(ssb, ssb_ohci_table);
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static struct ssb_driver ssb_ohci_driver = {
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.name = KBUILD_MODNAME,
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.id_table = ssb_ohci_table,
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.probe = ssb_ohci_probe,
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.remove = ssb_ohci_remove,
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.suspend = ssb_ohci_suspend,
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.resume = ssb_ohci_resume,
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};
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