Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit f2402f21 authored by Hauke Mehrtens's avatar Hauke Mehrtens Committed by Greg Kroah-Hartman
Browse files

USB: Add USB 2.0 to ssb ohci driver 



This adds USB 2.0 support to ssb ohci driver.
This patch was used in OpenWRT for a long time now.

CC: Steve Brown <sbrown@cortland.com>
Signed-off-by: default avatarHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 356c5a48

drivers/usb/host/ohci-ssb.c

+49 −3
Original line number Diff line number Diff line
@@ -93,8 +93,11 @@ 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);

}
@@ -106,10 +109,52 @@ static int ssb_ohci_attach(struct ssb_device *dev) 
	int err = -ENOMEM;

	u32 tmp, flags = 0;



	if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV)

		flags |= SSB_OHCI_TMSLOW_HOSTMODE;

	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));
@@ -200,6 +245,7 @@ static int ssb_ohci_resume(struct ssb_device *dev) 
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);