[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;
}

#ifdef CONFIG_PM
static int ssb_ohci_hcd_suspend(struct usb_hcd *hcd, pm_message_t message)
{
	struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
	struct ohci_hcd *ohci = &ohcidev->ohci;
	unsigned long flags;

	spin_lock_irqsave(&ohci->lock, flags);

	ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
	ohci_readl(ohci, &ohci->regs->intrdisable); /* commit write */

	/* make sure snapshot being resumed re-enumerates everything */
	if (message.event == PM_EVENT_PRETHAW)
		ohci_usb_reset(ohci);

	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);

	spin_unlock_irqrestore(&ohci->lock, flags);
	return 0;
}

static int ssb_ohci_hcd_resume(struct usb_hcd *hcd)
{
	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
	usb_hcd_resume_root_hub(hcd);
	return 0;
}
#endif /* CONFIG_PM */

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,

#ifdef CONFIG_PM
	.suspend		= ssb_ohci_hcd_suspend,
	.resume			= ssb_ohci_hcd_resume,
#endif

	.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,
	.hub_irq_enable		= ohci_rhsc_enable,
#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->dev->bus_id);
	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_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);

	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
	63	#ifdef CONFIG_PM
	64	static int ssb_ohci_hcd_suspend(struct usb_hcd *hcd, pm_message_t message)
65	{
66	struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
67	struct ohci_hcd *ohci = &ohcidev->ohci;
68	unsigned long flags;
69
70	spin_lock_irqsave(&ohci->lock, flags);
71
72	ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
73	ohci_readl(ohci, &ohci->regs->intrdisable); /* commit write */
74
75	/* make sure snapshot being resumed re-enumerates everything */
76	if (message.event == PM_EVENT_PRETHAW)
77	ohci_usb_reset(ohci);
78
79	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
80
81	spin_unlock_irqrestore(&ohci->lock, flags);
82	return 0;
83	}
84
85	static int ssb_ohci_hcd_resume(struct usb_hcd *hcd)
86	{
87	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
88	usb_hcd_resume_root_hub(hcd);
89	return 0;
90	}
91	#endif /* CONFIG_PM */
92
93	static const struct hc_driver ssb_ohci_hc_driver = {
94	.description = "ssb-usb-ohci",
95	.product_desc = "SSB OHCI Controller",
96	.hcd_priv_size = sizeof(struct ssb_ohci_device),
97
98	.irq = ohci_irq,
99	.flags = HCD_MEMORY \| HCD_USB11,
100
101	.reset = ssb_ohci_reset,
102	.start = ssb_ohci_start,
103	.stop = ohci_stop,
104	.shutdown = ohci_shutdown,
105
106	#ifdef CONFIG_PM
107	.suspend = ssb_ohci_hcd_suspend,
108	.resume = ssb_ohci_hcd_resume,
109	#endif
110
111	.urb_enqueue = ohci_urb_enqueue,
112	.urb_dequeue = ohci_urb_dequeue,
113	.endpoint_disable = ohci_endpoint_disable,
114
115	.get_frame_number = ohci_get_frame,
116
117	.hub_status_data = ohci_hub_status_data,
118	.hub_control = ohci_hub_control,
119	.hub_irq_enable = ohci_rhsc_enable,
4735b37c	120	#ifdef CONFIG_PM
c604e851 MB	121	.bus_suspend = ohci_bus_suspend,
c604e851 MB	122	.bus_resume = ohci_bus_resume,
4735b37c	123	#endif
c604e851 MB	124
	125	.start_port_reset = ohci_start_port_reset,
	126	};
	127
	128	static void ssb_ohci_detach(struct ssb_device *dev)
	129	{
	130	struct usb_hcd *hcd = ssb_get_drvdata(dev);
	131
	132	usb_remove_hcd(hcd);
	133	iounmap(hcd->regs);
	134	usb_put_hcd(hcd);
	135	ssb_device_disable(dev, 0);
	136	}
	137
	138	static int ssb_ohci_attach(struct ssb_device *dev)
	139	{
	140	struct ssb_ohci_device *ohcidev;
	141	struct usb_hcd *hcd;
	142	int err = -ENOMEM;
	143	u32 tmp, flags = 0;
	144
	145	if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV)
	146	flags \|= SSB_OHCI_TMSLOW_HOSTMODE;
	147
	148	ssb_device_enable(dev, flags);
	149
	150	hcd = usb_create_hcd(&ssb_ohci_hc_driver, dev->dev,
	151	dev->dev->bus_id);
	152	if (!hcd)
	153	goto err_dev_disable;
	154	ohcidev = hcd_to_ssb_ohci(hcd);
	155	ohcidev->enable_flags = flags;
	156
	157	tmp = ssb_read32(dev, SSB_ADMATCH0);
	158	hcd->rsrc_start = ssb_admatch_base(tmp);
	159	hcd->rsrc_len = ssb_admatch_size(tmp);
	160	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
	161	if (!hcd->regs)
	162	goto err_put_hcd;
	163	err = usb_add_hcd(hcd, dev->irq, IRQF_SHARED);
	164	if (err)
	165	goto err_iounmap;
	166
	167	ssb_set_drvdata(dev, hcd);
	168
	169	return err;
	170
	171	err_iounmap:
	172	iounmap(hcd->regs);
	173	err_put_hcd:
	174	usb_put_hcd(hcd);
	175	err_dev_disable:
	176	ssb_device_disable(dev, flags);
	177	return err;
	178	}
	179
	180	static int ssb_ohci_probe(struct ssb_device *dev,
	181	const struct ssb_device_id *id)
	182	{
	183	int err;
	184	u16 chipid_top;
	185
	186	/* USBcores are only connected on embedded devices. */
	187	chipid_top = (dev->bus->chip_id & 0xFF00);
188	if (chipid_top != 0x4700 && chipid_top != 0x5300)
189	return -ENODEV;
190
191	/* TODO: Probably need checks here; is the core connected? */
192
193	if (usb_disabled())
194	return -ENODEV;
195
196	/* We currently always attach SSB_DEV_USB11_HOSTDEV
197	* as HOST OHCI. If we want to attach it as Client device,
198	* we must branch here and call into the (yet to
199	* be written) Client mode driver. Same for remove(). */
200
201	err = ssb_ohci_attach(dev);
202
203	return err;
204	}
205
206	static void ssb_ohci_remove(struct ssb_device *dev)
207	{
208	ssb_ohci_detach(dev);
209	}
210
211	#ifdef CONFIG_PM
212
213	static int ssb_ohci_suspend(struct ssb_device *dev, pm_message_t state)
214	{
215	ssb_device_disable(dev, 0);
216
217	return 0;
218	}
219
220	static int ssb_ohci_resume(struct ssb_device *dev)
221	{
222	struct usb_hcd *hcd = ssb_get_drvdata(dev);
223	struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
224
225	ssb_device_enable(dev, ohcidev->enable_flags);
226
227	return 0;
228	}
229
230	#else /* !CONFIG_PM */
231	#define ssb_ohci_suspend NULL
232	#define ssb_ohci_resume NULL
233	#endif /* CONFIG_PM */
234
235	static const struct ssb_device_id ssb_ohci_table[] = {
236	SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOSTDEV, SSB_ANY_REV),
237	SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOST, SSB_ANY_REV),
238	SSB_DEVTABLE_END
239	};
240	MODULE_DEVICE_TABLE(ssb, ssb_ohci_table);
241
242	static struct ssb_driver ssb_ohci_driver = {
243	.name = KBUILD_MODNAME,
244	.id_table = ssb_ohci_table,
245	.probe = ssb_ohci_probe,
246	.remove = ssb_ohci_remove,
247	.suspend = ssb_ohci_suspend,
248	.resume = ssb_ohci_resume,
249	};