Release 4.11 drivers/usb/host/ohci-sa1111.c

/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
 * (C) Copyright 2002 Hewlett-Packard Company
 *
 * SA1111 Bus Glue
 *
 * Written by Christopher Hoover <ch@hpl.hp.com>
 * Based on fragments of previous driver by Russell King et al.
 *
 * This file is licenced under the GPL.
 */

#include <asm/mach-types.h>
#include <asm/hardware/sa1111.h>

#ifndef CONFIG_SA1111
#error "This file is SA-1111 bus glue.  CONFIG_SA1111 must be defined."
#endif


#define USB_STATUS	0x0118

#define USB_RESET	0x011c

#define USB_IRQTEST	0x0120


#define USB_RESET_FORCEIFRESET	(1 << 0)

#define USB_RESET_FORCEHCRESET	(1 << 1)

#define USB_RESET_CLKGENRESET	(1 << 2)

#define USB_RESET_SIMSCALEDOWN	(1 << 3)

#define USB_RESET_USBINTTEST	(1 << 4)

#define USB_RESET_SLEEPSTBYEN	(1 << 5)

#define USB_RESET_PWRSENSELOW	(1 << 6)

#define USB_RESET_PWRCTRLLOW	(1 << 7)


#define USB_STATUS_IRQHCIRMTWKUP  (1 <<  7)

#define USB_STATUS_IRQHCIBUFFACC  (1 <<  8)

#define USB_STATUS_NIRQHCIM       (1 <<  9)

#define USB_STATUS_NHCIMFCLR      (1 << 10)

#define USB_STATUS_USBPWRSENSE    (1 << 11)

#if 0
static void dump_hci_status(struct usb_hcd *hcd, const char *label)
{
        unsigned long status = sa1111_readl(hcd->regs + USB_STATUS);

        printk(KERN_DEBUG "%s USB_STATUS = { %s%s%s%s%s}\n", label,
             ((status & USB_STATUS_IRQHCIRMTWKUP) ? "IRQHCIRMTWKUP " : ""),
             ((status & USB_STATUS_IRQHCIBUFFACC) ? "IRQHCIBUFFACC " : ""),
             ((status & USB_STATUS_NIRQHCIM) ? "" : "IRQHCIM "),
             ((status & USB_STATUS_NHCIMFCLR) ? "" : "HCIMFCLR "),
             ((status & USB_STATUS_USBPWRSENSE) ? "USBPWRSENSE " : ""));
}
#endif



static int ohci_sa1111_reset(struct usb_hcd *hcd)
{
	struct ohci_hcd *ohci = hcd_to_ohci(hcd);

	ohci_hcd_init(ohci);
	return ohci_init(ohci);
}

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static int ohci_sa1111_start(struct usb_hcd *hcd)
{
	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
	int ret;

	ret = ohci_run(ohci);
	if (ret < 0) {
		ohci_err(ohci, "can't start\n");
		ohci_stop(hcd);
	}
	return ret;
}

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static const struct hc_driver ohci_sa1111_hc_driver = {
	.description =		hcd_name,
	.product_desc =		"SA-1111 OHCI",
	.hcd_priv_size =	sizeof(struct ohci_hcd),

	/*
         * generic hardware linkage
         */
	.irq =			ohci_irq,
	.flags =		HCD_USB11 | HCD_MEMORY,

	/*
         * basic lifecycle operations
         */
	.reset =		ohci_sa1111_reset,
	.start =		ohci_sa1111_start,
	.stop =			ohci_stop,
	.shutdown =		ohci_shutdown,

	/*
         * managing i/o requests and associated device resources
         */
	.urb_enqueue =		ohci_urb_enqueue,
	.urb_dequeue =		ohci_urb_dequeue,
	.endpoint_disable =	ohci_endpoint_disable,

	/*
         * scheduling support
         */
	.get_frame_number =	ohci_get_frame,

	/*
         * root hub support
         */
	.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 int sa1111_start_hc(struct sa1111_dev *dev)
{
	unsigned int usb_rst = 0;
	int ret;

	dev_dbg(&dev->dev, "starting SA-1111 OHCI USB Controller\n");

	if (machine_is_xp860() ||
	    machine_is_assabet() ||
	    machine_is_pfs168() ||
	    machine_is_badge4())
		usb_rst = USB_RESET_PWRSENSELOW | USB_RESET_PWRCTRLLOW;

	/*
         * Configure the power sense and control lines.  Place the USB
         * host controller in reset.
         */
	sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET,
		      dev->mapbase + USB_RESET);

	/*
         * Now, carefully enable the USB clock, and take
         * the USB host controller out of reset.
         */
	ret = sa1111_enable_device(dev);
	if (ret == 0) {
		udelay(11);
		sa1111_writel(usb_rst, dev->mapbase + USB_RESET);
	}

	return ret;
}

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CommitProp
Russell King
50
49.50%
5
71.43%
Christopher Hoover
49
48.51%
1
14.29%
Joe Perches
2
1.98%
1
14.29%
Total
101
100.00%
7
100.00%



static void sa1111_stop_hc(struct sa1111_dev *dev)
{
	unsigned int usb_rst;

	dev_dbg(&dev->dev, "stopping SA-1111 OHCI USB Controller\n");

	/*
         * Put the USB host controller into reset.
         */
	usb_rst = sa1111_readl(dev->mapbase + USB_RESET);
	sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET,
		      dev->mapbase + USB_RESET);

	/*
         * Stop the USB clock.
         */
	sa1111_disable_device(dev);
}

Contributors
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CommitProp
Russell King
40
68.97%
3
60.00%
Christopher Hoover
16
27.59%
1
20.00%
Joe Perches
2
3.45%
1
20.00%
Total
58
100.00%
5
100.00%

/**
 * ohci_hcd_sa1111_probe - initialize SA-1111-based HCDs
 *
 * Allocates basic resources for this USB host controller, and
 * then invokes the start() method for the HCD associated with it.
 */


static int ohci_hcd_sa1111_probe(struct sa1111_dev *dev)
{
	struct usb_hcd *hcd;
	int ret;

	if (usb_disabled())
		return -ENODEV;

	/*
         * We don't call dma_set_mask_and_coherent() here because the
         * DMA mask has already been appropraitely setup by the core
         * SA-1111 bus code (which includes bug workarounds.)
         */

	hcd = usb_create_hcd(&ohci_sa1111_hc_driver, &dev->dev, "sa1111");
	if (!hcd)
		return -ENOMEM;

	hcd->rsrc_start = dev->res.start;
	hcd->rsrc_len = resource_size(&dev->res);

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		dev_dbg(&dev->dev, "request_mem_region failed\n");
		ret = -EBUSY;
		goto err1;
	}

	hcd->regs = dev->mapbase;

	ret = sa1111_start_hc(dev);
	if (ret)
		goto err2;

	ret = usb_add_hcd(hcd, dev->irq[1], 0);
	if (ret == 0) {
		device_wakeup_enable(hcd->self.controller);
		return ret;
	}

	sa1111_stop_hc(dev);
 err2:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 err1:
	usb_put_hcd(hcd);
	return ret;
}

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Christopher Hoover
68
34.52%
1
7.69%
Alan Stern
53
26.90%
2
15.38%
Russell King
50
25.38%
5
38.46%
Peter Chen
11
5.58%
1
7.69%
Greg Kroah-Hartman
7
3.55%
1
7.69%
Joe Perches
4
2.03%
1
7.69%
David Brownell
3
1.52%
1
7.69%
Yong Zhang
1
0.51%
1
7.69%
Total
197
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13
100.00%

/**
 * ohci_hcd_sa1111_remove - shutdown processing for SA-1111-based HCDs
 * @dev: USB Host Controller being removed
 *
 * Reverses the effect of ohci_hcd_sa1111_probe(), first invoking
 * the HCD's stop() method.
 */


static int ohci_hcd_sa1111_remove(struct sa1111_dev *dev)
{
	struct usb_hcd *hcd = sa1111_get_drvdata(dev);

	usb_remove_hcd(hcd);
	sa1111_stop_hc(dev);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);

	return 0;
}

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Russell King
31
62.00%
4
57.14%
Christopher Hoover
17
34.00%
1
14.29%
Alan Stern
2
4.00%
2
28.57%
Total
50
100.00%
7
100.00%



static void ohci_hcd_sa1111_shutdown(struct sa1111_dev *dev)
{
	struct usb_hcd *hcd = sa1111_get_drvdata(dev);

	if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
		hcd->driver->shutdown(hcd);
		sa1111_stop_hc(dev);
	}
}

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Russell King
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static struct sa1111_driver ohci_hcd_sa1111_driver = {
	.drv = {
		.name	= "sa1111-ohci",
		.owner	= THIS_MODULE,
        },
	.devid		= SA1111_DEVID_USB,
	.probe		= ohci_hcd_sa1111_probe,
	.remove		= ohci_hcd_sa1111_remove,
	.shutdown	= ohci_hcd_sa1111_shutdown,
};
Overall Contributors
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Russell King
532
67.86%
13
54.17%
Christopher Hoover
165
21.05%
2
8.33%
Alan Stern
55
7.02%
2
8.33%
Peter Chen
11
1.40%
1
4.17%
Joe Perches
8
1.02%
2
8.33%
Greg Kroah-Hartman
8
1.02%
1
4.17%
David Brownell
3
0.38%
1
4.17%
Yong Zhang
1
0.13%
1
4.17%
Uwe Kleine-König
1
0.13%
1
4.17%
Total
784
100.00%
24
100.00%
Directory: drivers/usb/host

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