[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / host / bcma-hcd.c

/*
 * Broadcom specific Advanced Microcontroller Bus
 * Broadcom USB-core driver (BCMA bus glue)
 *
 * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
 *
 * Based on ssb-ohci driver
 * Copyright 2007 Michael Buesch <m@bues.ch>
 *
 * 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 2005-2011 Broadcom Corporation
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */
#include <linux/bcma/bcma.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb/ehci_pdriver.h>
#include <linux/usb/ohci_pdriver.h>

MODULE_AUTHOR("Hauke Mehrtens");
MODULE_DESCRIPTION("Common USB driver for BCMA Bus");
MODULE_LICENSE("GPL");

struct bcma_hcd_device {
	struct platform_device *ehci_dev;
	struct platform_device *ohci_dev;
};

/* Wait for bitmask in a register to get set or cleared.
 * timeout is in units of ten-microseconds.
 */
static int bcma_wait_bits(struct bcma_device *dev, u16 reg, u32 bitmask,
			  int timeout)
{
	int i;
	u32 val;

	for (i = 0; i < timeout; i++) {
		val = bcma_read32(dev, reg);
		if ((val & bitmask) == bitmask)
			return 0;
		udelay(10);
	}

	return -ETIMEDOUT;
}

static void __devinit bcma_hcd_4716wa(struct bcma_device *dev)
{
#ifdef CONFIG_BCMA_DRIVER_MIPS
	/* Work around for 4716 failures. */
	if (dev->bus->chipinfo.id == 0x4716) {
		u32 tmp;

		tmp = bcma_cpu_clock(&dev->bus->drv_mips);
		if (tmp >= 480000000)
			tmp = 0x1846b; /* set CDR to 0x11(fast) */
		else if (tmp == 453000000)
			tmp = 0x1046b; /* set CDR to 0x10(slow) */
		else
			tmp = 0;

		/* Change Shim mdio control reg to fix host not acking at
		 * high frequencies
		 */
		if (tmp) {
			bcma_write32(dev, 0x524, 0x1); /* write sel to enable */
			udelay(500);

			bcma_write32(dev, 0x524, tmp);
			udelay(500);
			bcma_write32(dev, 0x524, 0x4ab);
			udelay(500);
			bcma_read32(dev, 0x528);
			bcma_write32(dev, 0x528, 0x80000000);
		}
	}
#endif /* CONFIG_BCMA_DRIVER_MIPS */
}

/* based on arch/mips/brcm-boards/bcm947xx/pcibios.c */
static void __devinit bcma_hcd_init_chip(struct bcma_device *dev)
{
	u32 tmp;

	/*
	 * USB 2.0 special considerations:
	 *
	 * 1. Since the core supports both OHCI and EHCI functions, it must
	 *    only be reset once.
	 *
	 * 2. In addition to the standard SI reset sequence, the Host Control
	 *    Register must be programmed to bring the USB core and various
	 *    phy components out of reset.
	 */
	if (!bcma_core_is_enabled(dev)) {
		bcma_core_enable(dev, 0);
		mdelay(10);
		if (dev->id.rev >= 5) {
			/* Enable Misc PLL */
			tmp = bcma_read32(dev, 0x1e0);
			tmp |= 0x100;
			bcma_write32(dev, 0x1e0, tmp);
			if (bcma_wait_bits(dev, 0x1e0, 1 << 24, 100))
				printk(KERN_EMERG "Failed to enable misc PPL!\n");

			/* Take out of resets */
			bcma_write32(dev, 0x200, 0x4ff);
			udelay(25);
			bcma_write32(dev, 0x200, 0x6ff);
			udelay(25);

			/* Make sure digital and AFE are locked in USB PHY */
			bcma_write32(dev, 0x524, 0x6b);
			udelay(50);
			tmp = bcma_read32(dev, 0x524);
			udelay(50);
			bcma_write32(dev, 0x524, 0xab);
			udelay(50);
			tmp = bcma_read32(dev, 0x524);
			udelay(50);
			bcma_write32(dev, 0x524, 0x2b);
			udelay(50);
			tmp = bcma_read32(dev, 0x524);
			udelay(50);
			bcma_write32(dev, 0x524, 0x10ab);
			udelay(50);
			tmp = bcma_read32(dev, 0x524);

			if (bcma_wait_bits(dev, 0x528, 0xc000, 10000)) {
				tmp = bcma_read32(dev, 0x528);
				printk(KERN_EMERG
				       "USB20H mdio_rddata 0x%08x\n", tmp);
			}
			bcma_write32(dev, 0x528, 0x80000000);
			tmp = bcma_read32(dev, 0x314);
			udelay(265);
			bcma_write32(dev, 0x200, 0x7ff);
			udelay(10);

			/* Take USB and HSIC out of non-driving modes */
			bcma_write32(dev, 0x510, 0);
		} else {
			bcma_write32(dev, 0x200, 0x7ff);

			udelay(1);
		}

		bcma_hcd_4716wa(dev);
	}
}

static const struct usb_ehci_pdata ehci_pdata = {
};

static const struct usb_ohci_pdata ohci_pdata = {
};

static struct platform_device * __devinit
bcma_hcd_create_pdev(struct bcma_device *dev, bool ohci, u32 addr)
{
	struct platform_device *hci_dev;
	struct resource hci_res[2];
	int ret = -ENOMEM;

	memset(hci_res, 0, sizeof(hci_res));

	hci_res[0].start = addr;
	hci_res[0].end = hci_res[0].start + 0x1000 - 1;
	hci_res[0].flags = IORESOURCE_MEM;

	hci_res[1].start = dev->irq;
	hci_res[1].flags = IORESOURCE_IRQ;

	hci_dev = platform_device_alloc(ohci ? "ohci-platform" :
					"ehci-platform" , 0);
	if (!hci_dev)
		return NULL;

	hci_dev->dev.parent = &dev->dev;
	hci_dev->dev.dma_mask = &hci_dev->dev.coherent_dma_mask;

	ret = platform_device_add_resources(hci_dev, hci_res,
					    ARRAY_SIZE(hci_res));
	if (ret)
		goto err_alloc;
	if (ohci)
		ret = platform_device_add_data(hci_dev, &ohci_pdata,
					       sizeof(ohci_pdata));
	else
		ret = platform_device_add_data(hci_dev, &ehci_pdata,
					       sizeof(ehci_pdata));
	if (ret)
		goto err_alloc;
	ret = platform_device_add(hci_dev);
	if (ret)
		goto err_alloc;

	return hci_dev;

err_alloc:
	platform_device_put(hci_dev);
	return ERR_PTR(ret);
}

static int __devinit bcma_hcd_probe(struct bcma_device *dev)
{
	int err;
	u16 chipid_top;
	u32 ohci_addr;
	struct bcma_hcd_device *usb_dev;
	struct bcma_chipinfo *chipinfo;

	chipinfo = &dev->bus->chipinfo;
	/* USBcores are only connected on embedded devices. */
	chipid_top = (chipinfo->id & 0xFF00);
	if (chipid_top != 0x4700 && chipid_top != 0x5300)
		return -ENODEV;

	/* TODO: Probably need checks here; is the core connected? */

	if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) ||
	    dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32)))
		return -EOPNOTSUPP;

	usb_dev = kzalloc(sizeof(struct bcma_hcd_device), GFP_KERNEL);
	if (!usb_dev)
		return -ENOMEM;

	bcma_hcd_init_chip(dev);

	/* In AI chips EHCI is addrspace 0, OHCI is 1 */
	ohci_addr = dev->addr1;
	if ((chipinfo->id == 0x5357 || chipinfo->id == 0x4749)
	    && chipinfo->rev == 0)
		ohci_addr = 0x18009000;

	usb_dev->ohci_dev = bcma_hcd_create_pdev(dev, true, ohci_addr);
	if (IS_ERR(usb_dev->ohci_dev)) {
		err = PTR_ERR(usb_dev->ohci_dev);
		goto err_free_usb_dev;
	}

	usb_dev->ehci_dev = bcma_hcd_create_pdev(dev, false, dev->addr);
	if (IS_ERR(usb_dev->ehci_dev)) {
		err = PTR_ERR(usb_dev->ehci_dev);
		goto err_unregister_ohci_dev;
	}

	bcma_set_drvdata(dev, usb_dev);
	return 0;

err_unregister_ohci_dev:
	platform_device_unregister(usb_dev->ohci_dev);
err_free_usb_dev:
	kfree(usb_dev);
	return err;
}

static void __devexit bcma_hcd_remove(struct bcma_device *dev)
{
	struct bcma_hcd_device *usb_dev = bcma_get_drvdata(dev);
	struct platform_device *ohci_dev = usb_dev->ohci_dev;
	struct platform_device *ehci_dev = usb_dev->ehci_dev;

	if (ohci_dev)
		platform_device_unregister(ohci_dev);
	if (ehci_dev)
		platform_device_unregister(ehci_dev);

	bcma_core_disable(dev, 0);
}

static void bcma_hcd_shutdown(struct bcma_device *dev)
{
	bcma_core_disable(dev, 0);
}

#ifdef CONFIG_PM

static int bcma_hcd_suspend(struct bcma_device *dev)
{
	bcma_core_disable(dev, 0);

	return 0;
}

static int bcma_hcd_resume(struct bcma_device *dev)
{
	bcma_core_enable(dev, 0);

	return 0;
}

#else /* !CONFIG_PM */
#define bcma_hcd_suspend	NULL
#define bcma_hcd_resume	NULL
#endif /* CONFIG_PM */

static const struct bcma_device_id bcma_hcd_table[] __devinitconst = {
	BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_USB20_HOST, BCMA_ANY_REV, BCMA_ANY_CLASS),
	BCMA_CORETABLE_END
};
MODULE_DEVICE_TABLE(bcma, bcma_hcd_table);

static struct bcma_driver bcma_hcd_driver = {
	.name		= KBUILD_MODNAME,
	.id_table	= bcma_hcd_table,
	.probe		= bcma_hcd_probe,
	.remove		= __devexit_p(bcma_hcd_remove),
	.shutdown	= bcma_hcd_shutdown,
	.suspend	= bcma_hcd_suspend,
	.resume		= bcma_hcd_resume,
};

static int __init bcma_hcd_init(void)
{
	return bcma_driver_register(&bcma_hcd_driver);
}
module_init(bcma_hcd_init);

static void __exit bcma_hcd_exit(void)
{
	bcma_driver_unregister(&bcma_hcd_driver);
}
module_exit(bcma_hcd_exit);
Commit	Line	Data
62e11d1b HM	1	/*
	2	* Broadcom specific Advanced Microcontroller Bus
	3	* Broadcom USB-core driver (BCMA bus glue)
	4	*
	5	* Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
	6	*
	7	* Based on ssb-ohci driver
	8	* Copyright 2007 Michael Buesch <m@bues.ch>
	9	*
	10	* Derived from the OHCI-PCI driver
	11	* Copyright 1999 Roman Weissgaerber
	12	* Copyright 2000-2002 David Brownell
	13	* Copyright 1999 Linus Torvalds
	14	* Copyright 1999 Gregory P. Smith
	15	*
	16	* Derived from the USBcore related parts of Broadcom-SB
	17	* Copyright 2005-2011 Broadcom Corporation
	18	*
	19	* Licensed under the GNU/GPL. See COPYING for details.
	20	*/
	21	#include <linux/bcma/bcma.h>
	22	#include <linux/delay.h>
	23	#include <linux/platform_device.h>
	24	#include <linux/module.h>
6ba0d809	25	#include <linux/slab.h>
62e11d1b HM	26	#include <linux/usb/ehci_pdriver.h>
	27	#include <linux/usb/ohci_pdriver.h>
	28
	29	MODULE_AUTHOR("Hauke Mehrtens");
	30	MODULE_DESCRIPTION("Common USB driver for BCMA Bus");
	31	MODULE_LICENSE("GPL");
	32
	33	struct bcma_hcd_device {
	34	struct platform_device *ehci_dev;
	35	struct platform_device *ohci_dev;
	36	};
	37
	38	/* Wait for bitmask in a register to get set or cleared.
	39	* timeout is in units of ten-microseconds.
	40	*/
	41	static int bcma_wait_bits(struct bcma_device *dev, u16 reg, u32 bitmask,
	42	int timeout)
	43	{
	44	int i;
	45	u32 val;
	46
	47	for (i = 0; i < timeout; i++) {
	48	val = bcma_read32(dev, reg);
	49	if ((val & bitmask) == bitmask)
	50	return 0;
	51	udelay(10);
	52	}
	53
	54	return -ETIMEDOUT;
	55	}
	56
	57	static void __devinit bcma_hcd_4716wa(struct bcma_device *dev)
	58	{
	59	#ifdef CONFIG_BCMA_DRIVER_MIPS
	60	/* Work around for 4716 failures. */
	61	if (dev->bus->chipinfo.id == 0x4716) {
	62	u32 tmp;
	63
	64	tmp = bcma_cpu_clock(&dev->bus->drv_mips);
	65	if (tmp >= 480000000)
	66	tmp = 0x1846b; /* set CDR to 0x11(fast) */
	67	else if (tmp == 453000000)
	68	tmp = 0x1046b; /* set CDR to 0x10(slow) */
	69	else
	70	tmp = 0;
	71
	72	/* Change Shim mdio control reg to fix host not acking at
	73	* high frequencies
	74	*/
	75	if (tmp) {
	76	bcma_write32(dev, 0x524, 0x1); /* write sel to enable */
	77	udelay(500);
	78
	79	bcma_write32(dev, 0x524, tmp);
	80	udelay(500);
	81	bcma_write32(dev, 0x524, 0x4ab);
	82	udelay(500);
	83	bcma_read32(dev, 0x528);
	84	bcma_write32(dev, 0x528, 0x80000000);
	85	}
	86	}
	87	#endif /* CONFIG_BCMA_DRIVER_MIPS */
	88	}
	89
90	/* based on arch/mips/brcm-boards/bcm947xx/pcibios.c */
91	static void __devinit bcma_hcd_init_chip(struct bcma_device *dev)
92	{
93	u32 tmp;
94
95	/*
96	* USB 2.0 special considerations:
97	*
98	* 1. Since the core supports both OHCI and EHCI functions, it must
99	* only be reset once.
100	*
101	* 2. In addition to the standard SI reset sequence, the Host Control
102	* Register must be programmed to bring the USB core and various
103	* phy components out of reset.
104	*/
105	if (!bcma_core_is_enabled(dev)) {
106	bcma_core_enable(dev, 0);
107	mdelay(10);
108	if (dev->id.rev >= 5) {
109	/* Enable Misc PLL */
110	tmp = bcma_read32(dev, 0x1e0);
111	tmp \|= 0x100;
112	bcma_write32(dev, 0x1e0, tmp);
113	if (bcma_wait_bits(dev, 0x1e0, 1 << 24, 100))
114	printk(KERN_EMERG "Failed to enable misc PPL!\n");
115
116	/* Take out of resets */
117	bcma_write32(dev, 0x200, 0x4ff);
118	udelay(25);
119	bcma_write32(dev, 0x200, 0x6ff);
120	udelay(25);
121
122	/* Make sure digital and AFE are locked in USB PHY */
123	bcma_write32(dev, 0x524, 0x6b);
124	udelay(50);
125	tmp = bcma_read32(dev, 0x524);
126	udelay(50);
127	bcma_write32(dev, 0x524, 0xab);
128	udelay(50);
129	tmp = bcma_read32(dev, 0x524);
130	udelay(50);
131	bcma_write32(dev, 0x524, 0x2b);
132	udelay(50);
133	tmp = bcma_read32(dev, 0x524);
134	udelay(50);
135	bcma_write32(dev, 0x524, 0x10ab);
136	udelay(50);
137	tmp = bcma_read32(dev, 0x524);
138
139	if (bcma_wait_bits(dev, 0x528, 0xc000, 10000)) {
140	tmp = bcma_read32(dev, 0x528);
141	printk(KERN_EMERG
142	"USB20H mdio_rddata 0x%08x\n", tmp);
143	}
144	bcma_write32(dev, 0x528, 0x80000000);
145	tmp = bcma_read32(dev, 0x314);
146	udelay(265);
147	bcma_write32(dev, 0x200, 0x7ff);
148	udelay(10);
149
150	/* Take USB and HSIC out of non-driving modes */
151	bcma_write32(dev, 0x510, 0);
152	} else {
153	bcma_write32(dev, 0x200, 0x7ff);
154
155	udelay(1);
156	}
157
158	bcma_hcd_4716wa(dev);
159	}
160	}
161
162	static const struct usb_ehci_pdata ehci_pdata = {
163	};
164
165	static const struct usb_ohci_pdata ohci_pdata = {
166	};
167
168	static struct platform_device * __devinit
169	bcma_hcd_create_pdev(struct bcma_device *dev, bool ohci, u32 addr)
170	{
171	struct platform_device *hci_dev;
172	struct resource hci_res[2];
173	int ret = -ENOMEM;
174
175	memset(hci_res, 0, sizeof(hci_res));
176
177	hci_res[0].start = addr;
178	hci_res[0].end = hci_res[0].start + 0x1000 - 1;
179	hci_res[0].flags = IORESOURCE_MEM;
180
181	hci_res[1].start = dev->irq;
182	hci_res[1].flags = IORESOURCE_IRQ;
183
184	hci_dev = platform_device_alloc(ohci ? "ohci-platform" :
185	"ehci-platform" , 0);
186	if (!hci_dev)
187	return NULL;
188
189	hci_dev->dev.parent = &dev->dev;
190	hci_dev->dev.dma_mask = &hci_dev->dev.coherent_dma_mask;
191
192	ret = platform_device_add_resources(hci_dev, hci_res,
193	ARRAY_SIZE(hci_res));
194	if (ret)
195	goto err_alloc;
196	if (ohci)
197	ret = platform_device_add_data(hci_dev, &ohci_pdata,
198	sizeof(ohci_pdata));
199	else
200	ret = platform_device_add_data(hci_dev, &ehci_pdata,
201	sizeof(ehci_pdata));
202	if (ret)
203	goto err_alloc;
204	ret = platform_device_add(hci_dev);
205	if (ret)
206	goto err_alloc;
207
208	return hci_dev;
209
210	err_alloc:
211	platform_device_put(hci_dev);
212	return ERR_PTR(ret);
213	}
214
215	static int __devinit bcma_hcd_probe(struct bcma_device *dev)
216	{
217	int err;
218	u16 chipid_top;
219	u32 ohci_addr;
220	struct bcma_hcd_device *usb_dev;
221	struct bcma_chipinfo *chipinfo;
222
223	chipinfo = &dev->bus->chipinfo;
224	/* USBcores are only connected on embedded devices. */
225	chipid_top = (chipinfo->id & 0xFF00);
226	if (chipid_top != 0x4700 && chipid_top != 0x5300)
227	return -ENODEV;
228
229	/* TODO: Probably need checks here; is the core connected? */
230
231	if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) \|\|
232	dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32)))
233	return -EOPNOTSUPP;
234
235	usb_dev = kzalloc(sizeof(struct bcma_hcd_device), GFP_KERNEL);
236	if (!usb_dev)
237	return -ENOMEM;
238
239	bcma_hcd_init_chip(dev);
240
241	/* In AI chips EHCI is addrspace 0, OHCI is 1 */
242	ohci_addr = dev->addr1;
243	if ((chipinfo->id == 0x5357 \|\| chipinfo->id == 0x4749)
244	&& chipinfo->rev == 0)
245	ohci_addr = 0x18009000;
246
247	usb_dev->ohci_dev = bcma_hcd_create_pdev(dev, true, ohci_addr);
248	if (IS_ERR(usb_dev->ohci_dev)) {
249	err = PTR_ERR(usb_dev->ohci_dev);
250	goto err_free_usb_dev;
251	}
252
253	usb_dev->ehci_dev = bcma_hcd_create_pdev(dev, false, dev->addr);
254	if (IS_ERR(usb_dev->ehci_dev)) {
255	err = PTR_ERR(usb_dev->ehci_dev);
256	goto err_unregister_ohci_dev;
257	}
258
259	bcma_set_drvdata(dev, usb_dev);
260	return 0;
261
262	err_unregister_ohci_dev:
263	platform_device_unregister(usb_dev->ohci_dev);
264	err_free_usb_dev:
265	kfree(usb_dev);
266	return err;
267	}
268
269	static void __devexit bcma_hcd_remove(struct bcma_device *dev)
270	{
271	struct bcma_hcd_device *usb_dev = bcma_get_drvdata(dev);
272	struct platform_device *ohci_dev = usb_dev->ohci_dev;
273	struct platform_device *ehci_dev = usb_dev->ehci_dev;
274
275	if (ohci_dev)
276	platform_device_unregister(ohci_dev);
277	if (ehci_dev)
278	platform_device_unregister(ehci_dev);
279
280	bcma_core_disable(dev, 0);
281	}
282
283	static void bcma_hcd_shutdown(struct bcma_device *dev)
284	{
285	bcma_core_disable(dev, 0);
286	}
287
288	#ifdef CONFIG_PM
289
1f6155f5	290	static int bcma_hcd_suspend(struct bcma_device *dev)
62e11d1b HM	291	{
	292	bcma_core_disable(dev, 0);
	293
	294	return 0;
	295	}
	296
	297	static int bcma_hcd_resume(struct bcma_device *dev)
	298	{
	299	bcma_core_enable(dev, 0);
	300
	301	return 0;
	302	}
	303
	304	#else /* !CONFIG_PM */
	305	#define bcma_hcd_suspend NULL
	306	#define bcma_hcd_resume NULL
	307	#endif /* CONFIG_PM */
	308
	309	static const struct bcma_device_id bcma_hcd_table[] __devinitconst = {
	310	BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_USB20_HOST, BCMA_ANY_REV, BCMA_ANY_CLASS),
	311	BCMA_CORETABLE_END
	312	};
	313	MODULE_DEVICE_TABLE(bcma, bcma_hcd_table);
	314
	315	static struct bcma_driver bcma_hcd_driver = {
	316	.name = KBUILD_MODNAME,
	317	.id_table = bcma_hcd_table,
	318	.probe = bcma_hcd_probe,
	319	.remove = __devexit_p(bcma_hcd_remove),
	320	.shutdown = bcma_hcd_shutdown,
	321	.suspend = bcma_hcd_suspend,
	322	.resume = bcma_hcd_resume,
	323	};
	324
	325	static int __init bcma_hcd_init(void)
	326	{
	327	return bcma_driver_register(&bcma_hcd_driver);
	328	}
	329	module_init(bcma_hcd_init);
	330
	331	static void __exit bcma_hcd_exit(void)
	332	{
	333	bcma_driver_unregister(&bcma_hcd_driver);
	334	}
	335	module_exit(bcma_hcd_exit);