[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / host / ohci-ssb.c

/*
 * Sonics Silicon Backplane
 * Broadcom USB-core OHCI driver
 *
 * Copyright 2007 Michael Buesch <mb@bu3sch.de>
 *
 * 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 Broadcom Corporation
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */
#include <linux/ssb/ssb.h>


#define SSB_OHCI_TMSLOW_HOSTMODE	(1 << 29)

struct ssb_ohci_device {
	struct ohci_hcd ohci; /* _must_ be at the beginning. */

	u32 enable_flags;
};

static inline
struct ssb_ohci_device *hcd_to_ssb_ohci(struct usb_hcd *hcd)
{
	return (struct ssb_ohci_device *)(hcd->hcd_priv);
}


static int ssb_ohci_reset(struct usb_hcd *hcd)
{
	struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
	struct ohci_hcd *ohci = &ohcidev->ohci;
	int err;

	ohci_hcd_init(ohci);
	err = ohci_init(ohci);

	return err;
}

static int ssb_ohci_start(struct usb_hcd *hcd)
{
	struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
	struct ohci_hcd *ohci = &ohcidev->ohci;
	int err;

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

	return err;
}

static const struct hc_driver ssb_ohci_hc_driver = {
	.description		= "ssb-usb-ohci",
	.product_desc		= "SSB OHCI Controller",
	.hcd_priv_size		= sizeof(struct ssb_ohci_device),

	.irq			= ohci_irq,
	.flags			= HCD_MEMORY | HCD_USB11,

	.reset			= ssb_ohci_reset,
	.start			= ssb_ohci_start,
	.stop			= ohci_stop,
	.shutdown		= ohci_shutdown,

	.urb_enqueue		= ohci_urb_enqueue,
	.urb_dequeue		= ohci_urb_dequeue,
	.endpoint_disable	= ohci_endpoint_disable,

	.get_frame_number	= ohci_get_frame,

	.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 void ssb_ohci_detach(struct ssb_device *dev)
{
	struct usb_hcd *hcd = ssb_get_drvdata(dev);

	usb_remove_hcd(hcd);
	iounmap(hcd->regs);
	usb_put_hcd(hcd);
	ssb_device_disable(dev, 0);
}

static int ssb_ohci_attach(struct ssb_device *dev)
{
	struct ssb_ohci_device *ohcidev;
	struct usb_hcd *hcd;
	int err = -ENOMEM;
	u32 tmp, flags = 0;

	if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV)
		flags |= SSB_OHCI_TMSLOW_HOSTMODE;

	ssb_device_enable(dev, flags);

	hcd = usb_create_hcd(&ssb_ohci_hc_driver, dev->dev,
			dev_name(dev->dev));
	if (!hcd)
		goto err_dev_disable;
	ohcidev = hcd_to_ssb_ohci(hcd);
	ohcidev->enable_flags = flags;

	tmp = ssb_read32(dev, SSB_ADMATCH0);
	hcd->rsrc_start = ssb_admatch_base(tmp);
	hcd->rsrc_len = ssb_admatch_size(tmp);
	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs)
		goto err_put_hcd;
	err = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
	if (err)
		goto err_iounmap;

	ssb_set_drvdata(dev, hcd);

	return err;

err_iounmap:
	iounmap(hcd->regs);
err_put_hcd:
	usb_put_hcd(hcd);
err_dev_disable:
	ssb_device_disable(dev, flags);
	return err;
}

static int ssb_ohci_probe(struct ssb_device *dev,
		const struct ssb_device_id *id)
{
	int err;
	u16 chipid_top;

	/* 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 (usb_disabled())
		return -ENODEV;

	/* 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(). */

	err = ssb_ohci_attach(dev);

	return err;
}

static void ssb_ohci_remove(struct ssb_device *dev)
{
	ssb_ohci_detach(dev);
}

#ifdef CONFIG_PM

static int ssb_ohci_suspend(struct ssb_device *dev, pm_message_t state)
{
	ssb_device_disable(dev, 0);

	return 0;
}

static int ssb_ohci_resume(struct ssb_device *dev)
{
	struct usb_hcd *hcd = ssb_get_drvdata(dev);
	struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);

	ssb_device_enable(dev, ohcidev->enable_flags);

	ohci_finish_controller_resume(hcd);
	return 0;
}

#else /* !CONFIG_PM */
#define ssb_ohci_suspend	NULL
#define ssb_ohci_resume	NULL
#endif /* CONFIG_PM */

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_DEVTABLE_END
};
MODULE_DEVICE_TABLE(ssb, ssb_ohci_table);

static struct ssb_driver ssb_ohci_driver = {
	.name		= KBUILD_MODNAME,
	.id_table	= ssb_ohci_table,
	.probe		= ssb_ohci_probe,
	.remove		= ssb_ohci_remove,
	.suspend	= ssb_ohci_suspend,
	.resume		= ssb_ohci_resume,
};
Commit	Line	Data
c604e851 MB	1	/*
	2	* Sonics Silicon Backplane
	3	* Broadcom USB-core OHCI driver
	4	*
	5	* Copyright 2007 Michael Buesch <mb@bu3sch.de>
	6	*
	7	* Derived from the OHCI-PCI driver
	8	* Copyright 1999 Roman Weissgaerber
	9	* Copyright 2000-2002 David Brownell
	10	* Copyright 1999 Linus Torvalds
	11	* Copyright 1999 Gregory P. Smith
	12	*
	13	* Derived from the USBcore related parts of Broadcom-SB
	14	* Copyright 2005 Broadcom Corporation
	15	*
	16	* Licensed under the GNU/GPL. See COPYING for details.
	17	*/
	18	#include <linux/ssb/ssb.h>
	19
	20
	21	#define SSB_OHCI_TMSLOW_HOSTMODE (1 << 29)
	22
	23	struct ssb_ohci_device {
	24	struct ohci_hcd ohci; /* _must_ be at the beginning. */
	25
	26	u32 enable_flags;
	27	};
	28
	29	static inline
	30	struct ssb_ohci_device hcd_to_ssb_ohci(struct usb_hcd hcd)
	31	{
	32	return (struct ssb_ohci_device *)(hcd->hcd_priv);
	33	}
	34
	35
	36	static int ssb_ohci_reset(struct usb_hcd *hcd)
	37	{
	38	struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
	39	struct ohci_hcd *ohci = &ohcidev->ohci;
	40	int err;
	41
	42	ohci_hcd_init(ohci);
	43	err = ohci_init(ohci);
	44
	45	return err;
	46	}
	47
	48	static int ssb_ohci_start(struct usb_hcd *hcd)
	49	{
	50	struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
	51	struct ohci_hcd *ohci = &ohcidev->ohci;
	52	int err;
	53
	54	err = ohci_run(ohci);
	55	if (err < 0) {
	56	ohci_err(ohci, "can't start\n");
	57	ohci_stop(hcd);
	58	}
	59
	60	return err;
	61	}
	62
c604e851 MB	63	static const struct hc_driver ssb_ohci_hc_driver = {
	64	.description = "ssb-usb-ohci",
	65	.product_desc = "SSB OHCI Controller",
	66	.hcd_priv_size = sizeof(struct ssb_ohci_device),
	67
	68	.irq = ohci_irq,
	69	.flags = HCD_MEMORY \| HCD_USB11,
	70
	71	.reset = ssb_ohci_reset,
	72	.start = ssb_ohci_start,
	73	.stop = ohci_stop,
	74	.shutdown = ohci_shutdown,
	75
c604e851 MB	76	.urb_enqueue = ohci_urb_enqueue,
	77	.urb_dequeue = ohci_urb_dequeue,
	78	.endpoint_disable = ohci_endpoint_disable,
	79
	80	.get_frame_number = ohci_get_frame,
	81
	82	.hub_status_data = ohci_hub_status_data,
	83	.hub_control = ohci_hub_control,
4735b37c	84	#ifdef CONFIG_PM
c604e851 MB	85	.bus_suspend = ohci_bus_suspend,
c604e851 MB	86	.bus_resume = ohci_bus_resume,
4735b37c	87	#endif
c604e851 MB	88
	89	.start_port_reset = ohci_start_port_reset,
	90	};
	91
	92	static void ssb_ohci_detach(struct ssb_device *dev)
	93	{
	94	struct usb_hcd *hcd = ssb_get_drvdata(dev);
	95
	96	usb_remove_hcd(hcd);
	97	iounmap(hcd->regs);
	98	usb_put_hcd(hcd);
	99	ssb_device_disable(dev, 0);
	100	}
	101
	102	static int ssb_ohci_attach(struct ssb_device *dev)
	103	{
	104	struct ssb_ohci_device *ohcidev;
	105	struct usb_hcd *hcd;
	106	int err = -ENOMEM;
	107	u32 tmp, flags = 0;
	108
	109	if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV)
	110	flags \|= SSB_OHCI_TMSLOW_HOSTMODE;
	111
	112	ssb_device_enable(dev, flags);
	113
	114	hcd = usb_create_hcd(&ssb_ohci_hc_driver, dev->dev,
7071a3ce	115	dev_name(dev->dev));
c604e851 MB	116	if (!hcd)
	117	goto err_dev_disable;
	118	ohcidev = hcd_to_ssb_ohci(hcd);
	119	ohcidev->enable_flags = flags;
	120
	121	tmp = ssb_read32(dev, SSB_ADMATCH0);
	122	hcd->rsrc_start = ssb_admatch_base(tmp);
	123	hcd->rsrc_len = ssb_admatch_size(tmp);
	124	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
	125	if (!hcd->regs)
	126	goto err_put_hcd;
442258e2	127	err = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED \| IRQF_SHARED);
c604e851 MB	128	if (err)
	129	goto err_iounmap;
	130
	131	ssb_set_drvdata(dev, hcd);
	132
	133	return err;
	134
	135	err_iounmap:
	136	iounmap(hcd->regs);
	137	err_put_hcd:
	138	usb_put_hcd(hcd);
	139	err_dev_disable:
	140	ssb_device_disable(dev, flags);
	141	return err;
	142	}
	143
	144	static int ssb_ohci_probe(struct ssb_device *dev,
	145	const struct ssb_device_id *id)
	146	{
	147	int err;
	148	u16 chipid_top;
	149
	150	/* USBcores are only connected on embedded devices. */
	151	chipid_top = (dev->bus->chip_id & 0xFF00);
	152	if (chipid_top != 0x4700 && chipid_top != 0x5300)
	153	return -ENODEV;
	154
	155	/* TODO: Probably need checks here; is the core connected? */
	156
	157	if (usb_disabled())
	158	return -ENODEV;
	159
	160	/* We currently always attach SSB_DEV_USB11_HOSTDEV
	161	* as HOST OHCI. If we want to attach it as Client device,
	162	* we must branch here and call into the (yet to
	163	* be written) Client mode driver. Same for remove(). */
	164
	165	err = ssb_ohci_attach(dev);
	166
	167	return err;
	168	}
	169
	170	static void ssb_ohci_remove(struct ssb_device *dev)
	171	{
	172	ssb_ohci_detach(dev);
	173	}
	174
	175	#ifdef CONFIG_PM
	176
	177	static int ssb_ohci_suspend(struct ssb_device *dev, pm_message_t state)
	178	{
	179	ssb_device_disable(dev, 0);
	180
	181	return 0;
	182	}
	183
	184	static int ssb_ohci_resume(struct ssb_device *dev)
	185	{
	186	struct usb_hcd *hcd = ssb_get_drvdata(dev);
	187	struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
	188
	189	ssb_device_enable(dev, ohcidev->enable_flags);
	190
43bbb7e0	191	ohci_finish_controller_resume(hcd);
c604e851 MB	192	return 0;
	193	}
	194
	195	#else /* !CONFIG_PM */
	196	#define ssb_ohci_suspend NULL
	197	#define ssb_ohci_resume NULL
	198	#endif /* CONFIG_PM */
	199
	200	static const struct ssb_device_id ssb_ohci_table[] = {
	201	SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOSTDEV, SSB_ANY_REV),
	202	SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOST, SSB_ANY_REV),
	203	SSB_DEVTABLE_END
	204	};
	205	MODULE_DEVICE_TABLE(ssb, ssb_ohci_table);
	206
	207	static struct ssb_driver ssb_ohci_driver = {
	208	.name = KBUILD_MODNAME,
	209	.id_table = ssb_ohci_table,
	210	.probe = ssb_ohci_probe,
	211	.remove = ssb_ohci_remove,
	212	.suspend = ssb_ohci_suspend,
	213	.resume = ssb_ohci_resume,
	214	};