[mirror_ubuntu-artful-kernel.git] / drivers / mfd / omap-usb-tll.c

/**
 * omap-usb-tll.c - The USB TLL driver for OMAP EHCI & OHCI
 *
 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
 * Author: Keshava Munegowda <keshava_mgowda@ti.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2  of
 * the License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/err.h>
#include <plat/usb.h>
#include <linux/pm_runtime.h>

#define USBTLL_DRIVER_NAME	"usbhs_tll"

/* TLL Register Set */
#define	OMAP_USBTLL_REVISION				(0x00)
#define	OMAP_USBTLL_SYSCONFIG				(0x10)
#define	OMAP_USBTLL_SYSCONFIG_CACTIVITY			(1 << 8)
#define	OMAP_USBTLL_SYSCONFIG_SIDLEMODE			(1 << 3)
#define	OMAP_USBTLL_SYSCONFIG_ENAWAKEUP			(1 << 2)
#define	OMAP_USBTLL_SYSCONFIG_SOFTRESET			(1 << 1)
#define	OMAP_USBTLL_SYSCONFIG_AUTOIDLE			(1 << 0)

#define	OMAP_USBTLL_SYSSTATUS				(0x14)
#define	OMAP_USBTLL_SYSSTATUS_RESETDONE			(1 << 0)

#define	OMAP_USBTLL_IRQSTATUS				(0x18)
#define	OMAP_USBTLL_IRQENABLE				(0x1C)

#define	OMAP_TLL_SHARED_CONF				(0x30)
#define	OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN		(1 << 6)
#define	OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN		(1 << 5)
#define	OMAP_TLL_SHARED_CONF_USB_DIVRATION		(1 << 2)
#define	OMAP_TLL_SHARED_CONF_FCLK_REQ			(1 << 1)
#define	OMAP_TLL_SHARED_CONF_FCLK_IS_ON			(1 << 0)

#define	OMAP_TLL_CHANNEL_CONF(num)			(0x040 + 0x004 * num)
#define OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT		24
#define	OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF		(1 << 11)
#define	OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE		(1 << 10)
#define	OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE		(1 << 9)
#define	OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE		(1 << 8)
#define OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS		(1 << 1)
#define	OMAP_TLL_CHANNEL_CONF_CHANEN			(1 << 0)

#define OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0		0x0
#define OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM		0x1
#define OMAP_TLL_FSLSMODE_3PIN_PHY			0x2
#define OMAP_TLL_FSLSMODE_4PIN_PHY			0x3
#define OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0		0x4
#define OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM		0x5
#define OMAP_TLL_FSLSMODE_3PIN_TLL			0x6
#define OMAP_TLL_FSLSMODE_4PIN_TLL			0x7
#define OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0		0xA
#define OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM		0xB

#define	OMAP_TLL_ULPI_FUNCTION_CTRL(num)		(0x804 + 0x100 * num)
#define	OMAP_TLL_ULPI_INTERFACE_CTRL(num)		(0x807 + 0x100 * num)
#define	OMAP_TLL_ULPI_OTG_CTRL(num)			(0x80A + 0x100 * num)
#define	OMAP_TLL_ULPI_INT_EN_RISE(num)			(0x80D + 0x100 * num)
#define	OMAP_TLL_ULPI_INT_EN_FALL(num)			(0x810 + 0x100 * num)
#define	OMAP_TLL_ULPI_INT_STATUS(num)			(0x813 + 0x100 * num)
#define	OMAP_TLL_ULPI_INT_LATCH(num)			(0x814 + 0x100 * num)
#define	OMAP_TLL_ULPI_DEBUG(num)			(0x815 + 0x100 * num)
#define	OMAP_TLL_ULPI_SCRATCH_REGISTER(num)		(0x816 + 0x100 * num)

#define OMAP_REV2_TLL_CHANNEL_COUNT			2
#define OMAP_TLL_CHANNEL_COUNT				3
#define OMAP_TLL_CHANNEL_1_EN_MASK			(1 << 0)
#define OMAP_TLL_CHANNEL_2_EN_MASK			(1 << 1)
#define OMAP_TLL_CHANNEL_3_EN_MASK			(1 << 2)

/* Values of USBTLL_REVISION - Note: these are not given in the TRM */
#define OMAP_USBTLL_REV1		0x00000015	/* OMAP3 */
#define OMAP_USBTLL_REV2		0x00000018	/* OMAP 3630 */
#define OMAP_USBTLL_REV3		0x00000004	/* OMAP4 */

#define is_ehci_tll_mode(x)	(x == OMAP_EHCI_PORT_MODE_TLL)

struct usbtll_omap {
	struct clk				*usbtll_p1_fck;
	struct clk				*usbtll_p2_fck;
	struct usbtll_omap_platform_data	platdata;
	/* secure the register updates */
	spinlock_t				lock;
};

/*-------------------------------------------------------------------------*/

const char usbtll_driver_name[] = USBTLL_DRIVER_NAME;
struct platform_device	*tll_pdev;

/*-------------------------------------------------------------------------*/

static inline void usbtll_write(void __iomem *base, u32 reg, u32 val)
{
	__raw_writel(val, base + reg);
}

static inline u32 usbtll_read(void __iomem *base, u32 reg)
{
	return __raw_readl(base + reg);
}

static inline void usbtll_writeb(void __iomem *base, u8 reg, u8 val)
{
	__raw_writeb(val, base + reg);
}

static inline u8 usbtll_readb(void __iomem *base, u8 reg)
{
	return __raw_readb(base + reg);
}

/*-------------------------------------------------------------------------*/

static bool is_ohci_port(enum usbhs_omap_port_mode pmode)
{
	switch (pmode) {
	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
	case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
	case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
		return true;

	default:
		return false;
	}
}

/*
 * convert the port-mode enum to a value we can use in the FSLSMODE
 * field of USBTLL_CHANNEL_CONF
 */
static unsigned ohci_omap3_fslsmode(enum usbhs_omap_port_mode mode)
{
	switch (mode) {
	case OMAP_USBHS_PORT_MODE_UNUSED:
	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
		return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;

	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
		return OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM;

	case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
		return OMAP_TLL_FSLSMODE_3PIN_PHY;

	case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
		return OMAP_TLL_FSLSMODE_4PIN_PHY;

	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
		return OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0;

	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
		return OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM;

	case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
		return OMAP_TLL_FSLSMODE_3PIN_TLL;

	case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
		return OMAP_TLL_FSLSMODE_4PIN_TLL;

	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
		return OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0;

	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
		return OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM;
	default:
		pr_warn("Invalid port mode, using default\n");
		return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;
	}
}

/**
 * usbtll_omap_probe - initialize TI-based HCDs
 *
 * Allocates basic resources for this USB host controller.
 */
static int __devinit usbtll_omap_probe(struct platform_device *pdev)
{
	struct device				*dev =  &pdev->dev;
	struct usbtll_omap_platform_data	*pdata = dev->platform_data;
	void __iomem				*base;
	struct resource				*res;
	struct usbtll_omap			*tll;
	unsigned				reg;
	unsigned long				flags;
	int					ret = 0;
	int					i, ver, count;

	dev_dbg(dev, "starting TI HSUSB TLL Controller\n");

	tll = kzalloc(sizeof(struct usbtll_omap), GFP_KERNEL);
	if (!tll) {
		dev_err(dev, "Memory allocation failed\n");
		ret = -ENOMEM;
		goto end;
	}

	spin_lock_init(&tll->lock);

	for (i = 0; i < OMAP3_HS_USB_PORTS; i++)
		tll->platdata.port_mode[i] = pdata->port_mode[i];

	tll->usbtll_p1_fck = clk_get(dev, "usb_tll_hs_usb_ch0_clk");
	if (IS_ERR(tll->usbtll_p1_fck)) {
		ret = PTR_ERR(tll->usbtll_p1_fck);
		dev_err(dev, "usbtll_p1_fck failed error:%d\n", ret);
		goto err_tll;
	}

	tll->usbtll_p2_fck = clk_get(dev, "usb_tll_hs_usb_ch1_clk");
	if (IS_ERR(tll->usbtll_p2_fck)) {
		ret = PTR_ERR(tll->usbtll_p2_fck);
		dev_err(dev, "usbtll_p2_fck failed error:%d\n", ret);
		goto err_usbtll_p1_fck;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(dev, "usb tll get resource failed\n");
		ret = -ENODEV;
		goto err_usbtll_p2_fck;
	}

	base = ioremap(res->start, resource_size(res));
	if (!base) {
		dev_err(dev, "TLL ioremap failed\n");
		ret = -ENOMEM;
		goto err_usbtll_p2_fck;
	}

	platform_set_drvdata(pdev, tll);
	pm_runtime_enable(dev);
	pm_runtime_get_sync(dev);

	spin_lock_irqsave(&tll->lock, flags);

	ver =  usbtll_read(base, OMAP_USBTLL_REVISION);
	switch (ver) {
	case OMAP_USBTLL_REV1:
	case OMAP_USBTLL_REV2:
		count = OMAP_TLL_CHANNEL_COUNT;
		break;
	case OMAP_USBTLL_REV3:
		count = OMAP_REV2_TLL_CHANNEL_COUNT;
		break;
	default:
		dev_err(dev, "TLL version failed\n");
		ret = -ENODEV;
		goto err_ioremap;
	}

	if (is_ehci_tll_mode(pdata->port_mode[0]) ||
	    is_ehci_tll_mode(pdata->port_mode[1]) ||
	    is_ehci_tll_mode(pdata->port_mode[2]) ||
	    is_ohci_port(pdata->port_mode[0]) ||
	    is_ohci_port(pdata->port_mode[1]) ||
	    is_ohci_port(pdata->port_mode[2])) {

		/* Program Common TLL register */
		reg = usbtll_read(base, OMAP_TLL_SHARED_CONF);
		reg |= (OMAP_TLL_SHARED_CONF_FCLK_IS_ON
			| OMAP_TLL_SHARED_CONF_USB_DIVRATION);
		reg &= ~OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN;
		reg &= ~OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN;

		usbtll_write(base, OMAP_TLL_SHARED_CONF, reg);

		/* Enable channels now */
		for (i = 0; i < count; i++) {
			reg = usbtll_read(base,	OMAP_TLL_CHANNEL_CONF(i));

			if (is_ohci_port(pdata->port_mode[i])) {
				reg |= ohci_omap3_fslsmode(pdata->port_mode[i])
				<< OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT;
				reg |= OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS;
			} else if (pdata->port_mode[i] ==
					OMAP_EHCI_PORT_MODE_TLL) {
				/*
				 * Disable AutoIdle, BitStuffing
				 * and use SDR Mode
				 */
				reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE
					| OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
					| OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE);
			} else {
				continue;
			}
			reg |= OMAP_TLL_CHANNEL_CONF_CHANEN;
			usbtll_write(base, OMAP_TLL_CHANNEL_CONF(i), reg);

			usbtll_writeb(base,
				      OMAP_TLL_ULPI_SCRATCH_REGISTER(i),
				      0xbe);
		}
	}

err_ioremap:
	spin_unlock_irqrestore(&tll->lock, flags);
	iounmap(base);
	pm_runtime_put_sync(dev);
	tll_pdev = pdev;
	if (!ret)
		goto end;
	pm_runtime_disable(dev);

err_usbtll_p2_fck:
	clk_put(tll->usbtll_p2_fck);

err_usbtll_p1_fck:
	clk_put(tll->usbtll_p1_fck);

err_tll:
	kfree(tll);

end:
	return ret;
}

/**
 * usbtll_omap_remove - shutdown processing for UHH & TLL HCDs
 * @pdev: USB Host Controller being removed
 *
 * Reverses the effect of usbtll_omap_probe().
 */
static int __devexit usbtll_omap_remove(struct platform_device *pdev)
{
	struct usbtll_omap *tll = platform_get_drvdata(pdev);

	clk_put(tll->usbtll_p2_fck);
	clk_put(tll->usbtll_p1_fck);
	pm_runtime_disable(&pdev->dev);
	kfree(tll);
	return 0;
}

static int usbtll_runtime_resume(struct device *dev)
{
	struct usbtll_omap			*tll = dev_get_drvdata(dev);
	struct usbtll_omap_platform_data	*pdata = &tll->platdata;
	unsigned long				flags;

	dev_dbg(dev, "usbtll_runtime_resume\n");

	if (!pdata) {
		dev_dbg(dev, "missing platform_data\n");
		return  -ENODEV;
	}

	spin_lock_irqsave(&tll->lock, flags);

	if (is_ehci_tll_mode(pdata->port_mode[0]))
		clk_enable(tll->usbtll_p1_fck);

	if (is_ehci_tll_mode(pdata->port_mode[1]))
		clk_enable(tll->usbtll_p2_fck);

	spin_unlock_irqrestore(&tll->lock, flags);

	return 0;
}

static int usbtll_runtime_suspend(struct device *dev)
{
	struct usbtll_omap			*tll = dev_get_drvdata(dev);
	struct usbtll_omap_platform_data	*pdata = &tll->platdata;
	unsigned long				flags;

	dev_dbg(dev, "usbtll_runtime_suspend\n");

	if (!pdata) {
		dev_dbg(dev, "missing platform_data\n");
		return  -ENODEV;
	}

	spin_lock_irqsave(&tll->lock, flags);

	if (is_ehci_tll_mode(pdata->port_mode[0]))
		clk_disable(tll->usbtll_p1_fck);

	if (is_ehci_tll_mode(pdata->port_mode[1]))
		clk_disable(tll->usbtll_p2_fck);

	spin_unlock_irqrestore(&tll->lock, flags);

	return 0;
}

static const struct dev_pm_ops usbtllomap_dev_pm_ops = {
	SET_RUNTIME_PM_OPS(usbtll_runtime_suspend,
			   usbtll_runtime_resume,
			   NULL)
};

static struct platform_driver usbtll_omap_driver = {
	.driver = {
		.name		= (char *)usbtll_driver_name,
		.owner		= THIS_MODULE,
		.pm		= &usbtllomap_dev_pm_ops,
	},
	.probe		= usbtll_omap_probe,
	.remove		= usbtll_omap_remove,
};

int omap_tll_enable(void)
{
	if (!tll_pdev) {
		pr_err("missing omap usbhs tll platform_data\n");
		return  -ENODEV;
	}
	return pm_runtime_get_sync(&tll_pdev->dev);
}
EXPORT_SYMBOL_GPL(omap_tll_enable);

int omap_tll_disable(void)
{
	if (!tll_pdev) {
		pr_err("missing omap usbhs tll platform_data\n");
		return  -ENODEV;
	}
	return pm_runtime_put_sync(&tll_pdev->dev);
}
EXPORT_SYMBOL_GPL(omap_tll_disable);

MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>");
MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("usb tll driver for TI OMAP EHCI and OHCI controllers");

static int __init omap_usbtll_drvinit(void)
{
	return platform_driver_register(&usbtll_omap_driver);
}

/*
 * init before usbhs core driver;
 * The usbtll driver should be initialized before
 * the usbhs core driver probe function is called.
 */
fs_initcall(omap_usbtll_drvinit);

static void __exit omap_usbtll_drvexit(void)
{
	platform_driver_unregister(&usbtll_omap_driver);
}
module_exit(omap_usbtll_drvexit);
Commit	Line	Data
16fa3dc7 KM	1	/**
	2	* omap-usb-tll.c - The USB TLL driver for OMAP EHCI & OHCI
	3	*
	4	* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
	5	* Author: Keshava Munegowda <keshava_mgowda@ti.com>
	6	*
	7	* This program is free software: you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 of
	9	* the License as published by the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19	#include <linux/kernel.h>
	20	#include <linux/module.h>
	21	#include <linux/types.h>
	22	#include <linux/slab.h>
	23	#include <linux/spinlock.h>
	24	#include <linux/platform_device.h>
	25	#include <linux/clk.h>
	26	#include <linux/io.h>
	27	#include <linux/err.h>
	28	#include <plat/usb.h>
	29	#include <linux/pm_runtime.h>
	30
	31	#define USBTLL_DRIVER_NAME "usbhs_tll"
	32
	33	/* TLL Register Set */
	34	#define OMAP_USBTLL_REVISION (0x00)
	35	#define OMAP_USBTLL_SYSCONFIG (0x10)
	36	#define OMAP_USBTLL_SYSCONFIG_CACTIVITY (1 << 8)
	37	#define OMAP_USBTLL_SYSCONFIG_SIDLEMODE (1 << 3)
	38	#define OMAP_USBTLL_SYSCONFIG_ENAWAKEUP (1 << 2)
	39	#define OMAP_USBTLL_SYSCONFIG_SOFTRESET (1 << 1)
	40	#define OMAP_USBTLL_SYSCONFIG_AUTOIDLE (1 << 0)
	41
	42	#define OMAP_USBTLL_SYSSTATUS (0x14)
	43	#define OMAP_USBTLL_SYSSTATUS_RESETDONE (1 << 0)
	44
	45	#define OMAP_USBTLL_IRQSTATUS (0x18)
	46	#define OMAP_USBTLL_IRQENABLE (0x1C)
	47
	48	#define OMAP_TLL_SHARED_CONF (0x30)
	49	#define OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN (1 << 6)
	50	#define OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN (1 << 5)
	51	#define OMAP_TLL_SHARED_CONF_USB_DIVRATION (1 << 2)
	52	#define OMAP_TLL_SHARED_CONF_FCLK_REQ (1 << 1)
	53	#define OMAP_TLL_SHARED_CONF_FCLK_IS_ON (1 << 0)
	54
	55	#define OMAP_TLL_CHANNEL_CONF(num) (0x040 + 0x004 * num)
	56	#define OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT 24
	57	#define OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF (1 << 11)
	58	#define OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE (1 << 10)
	59	#define OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE (1 << 9)
	60	#define OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE (1 << 8)
	61	#define OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS (1 << 1)
	62	#define OMAP_TLL_CHANNEL_CONF_CHANEN (1 << 0)
	63
	64	#define OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0 0x0
65	#define OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM 0x1
66	#define OMAP_TLL_FSLSMODE_3PIN_PHY 0x2
67	#define OMAP_TLL_FSLSMODE_4PIN_PHY 0x3
68	#define OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0 0x4
69	#define OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM 0x5
70	#define OMAP_TLL_FSLSMODE_3PIN_TLL 0x6
71	#define OMAP_TLL_FSLSMODE_4PIN_TLL 0x7
72	#define OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0 0xA
73	#define OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM 0xB
74
75	#define OMAP_TLL_ULPI_FUNCTION_CTRL(num) (0x804 + 0x100 * num)
76	#define OMAP_TLL_ULPI_INTERFACE_CTRL(num) (0x807 + 0x100 * num)
77	#define OMAP_TLL_ULPI_OTG_CTRL(num) (0x80A + 0x100 * num)
78	#define OMAP_TLL_ULPI_INT_EN_RISE(num) (0x80D + 0x100 * num)
79	#define OMAP_TLL_ULPI_INT_EN_FALL(num) (0x810 + 0x100 * num)
80	#define OMAP_TLL_ULPI_INT_STATUS(num) (0x813 + 0x100 * num)
81	#define OMAP_TLL_ULPI_INT_LATCH(num) (0x814 + 0x100 * num)
82	#define OMAP_TLL_ULPI_DEBUG(num) (0x815 + 0x100 * num)
83	#define OMAP_TLL_ULPI_SCRATCH_REGISTER(num) (0x816 + 0x100 * num)
84
85	#define OMAP_REV2_TLL_CHANNEL_COUNT 2
86	#define OMAP_TLL_CHANNEL_COUNT 3
87	#define OMAP_TLL_CHANNEL_1_EN_MASK (1 << 0)
88	#define OMAP_TLL_CHANNEL_2_EN_MASK (1 << 1)
89	#define OMAP_TLL_CHANNEL_3_EN_MASK (1 << 2)
90
91	/* Values of USBTLL_REVISION - Note: these are not given in the TRM */
92	#define OMAP_USBTLL_REV1 0x00000015 /* OMAP3 */
93	#define OMAP_USBTLL_REV2 0x00000018 /* OMAP 3630 */
94	#define OMAP_USBTLL_REV3 0x00000004 /* OMAP4 */
95
96	#define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL)
97
98	struct usbtll_omap {
99	struct clk *usbtll_p1_fck;
100	struct clk *usbtll_p2_fck;
101	struct usbtll_omap_platform_data platdata;
102	/* secure the register updates */
103	spinlock_t lock;
104	};
105
106	/-------------------------------------------------------------------------/
107
108	const char usbtll_driver_name[] = USBTLL_DRIVER_NAME;
109	struct platform_device *tll_pdev;
110
111	/-------------------------------------------------------------------------/
112
113	static inline void usbtll_write(void __iomem *base, u32 reg, u32 val)
114	{
115	__raw_writel(val, base + reg);
116	}
117
118	static inline u32 usbtll_read(void __iomem *base, u32 reg)
119	{
120	return __raw_readl(base + reg);
121	}
122
123	static inline void usbtll_writeb(void __iomem *base, u8 reg, u8 val)
124	{
125	__raw_writeb(val, base + reg);
126	}
127
128	static inline u8 usbtll_readb(void __iomem *base, u8 reg)
129	{
130	return __raw_readb(base + reg);
131	}
132
133	/-------------------------------------------------------------------------/
134
135	static bool is_ohci_port(enum usbhs_omap_port_mode pmode)
136	{
137	switch (pmode) {
138	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
139	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
140	case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
141	case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
142	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
143	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
144	case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
145	case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
146	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
147	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
148	return true;
149
150	default:
151	return false;
152	}
153	}
154
155	/*
156	* convert the port-mode enum to a value we can use in the FSLSMODE
157	* field of USBTLL_CHANNEL_CONF
158	*/
159	static unsigned ohci_omap3_fslsmode(enum usbhs_omap_port_mode mode)
160	{
161	switch (mode) {
162	case OMAP_USBHS_PORT_MODE_UNUSED:
163	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
164	return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;
165
166	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
167	return OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM;
168
169	case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
170	return OMAP_TLL_FSLSMODE_3PIN_PHY;
171
172	case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
173	return OMAP_TLL_FSLSMODE_4PIN_PHY;
174
175	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
176	return OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0;
177
178	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
179	return OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM;
180
181	case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
182	return OMAP_TLL_FSLSMODE_3PIN_TLL;
183
184	case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
185	return OMAP_TLL_FSLSMODE_4PIN_TLL;
186
187	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
188	return OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0;
189
190	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
191	return OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM;
192	default:
193	pr_warn("Invalid port mode, using default\n");
194	return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;
195	}
196	}
197
198	/**
199	* usbtll_omap_probe - initialize TI-based HCDs
200	*
201	* Allocates basic resources for this USB host controller.
202	*/
203	static int __devinit usbtll_omap_probe(struct platform_device *pdev)
204	{
205	struct device *dev = &pdev->dev;
206	struct usbtll_omap_platform_data *pdata = dev->platform_data;
207	void __iomem *base;
208	struct resource *res;
209	struct usbtll_omap *tll;
210	unsigned reg;
211	unsigned long flags;
212	int ret = 0;
213	int i, ver, count;
214
215	dev_dbg(dev, "starting TI HSUSB TLL Controller\n");
216
217	tll = kzalloc(sizeof(struct usbtll_omap), GFP_KERNEL);
218	if (!tll) {
219	dev_err(dev, "Memory allocation failed\n");
220	ret = -ENOMEM;
221	goto end;
222	}
223
224	spin_lock_init(&tll->lock);
225
226	for (i = 0; i < OMAP3_HS_USB_PORTS; i++)
227	tll->platdata.port_mode[i] = pdata->port_mode[i];
228
229	tll->usbtll_p1_fck = clk_get(dev, "usb_tll_hs_usb_ch0_clk");
230	if (IS_ERR(tll->usbtll_p1_fck)) {
231	ret = PTR_ERR(tll->usbtll_p1_fck);
232	dev_err(dev, "usbtll_p1_fck failed error:%d\n", ret);
233	goto err_tll;
234	}
235
236	tll->usbtll_p2_fck = clk_get(dev, "usb_tll_hs_usb_ch1_clk");
237	if (IS_ERR(tll->usbtll_p2_fck)) {
238	ret = PTR_ERR(tll->usbtll_p2_fck);
239	dev_err(dev, "usbtll_p2_fck failed error:%d\n", ret);
240	goto err_usbtll_p1_fck;
241	}
242
243	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
244	if (!res) {
245	dev_err(dev, "usb tll get resource failed\n");
246	ret = -ENODEV;
247	goto err_usbtll_p2_fck;
248	}
249
250	base = ioremap(res->start, resource_size(res));
251	if (!base) {
252	dev_err(dev, "TLL ioremap failed\n");
253	ret = -ENOMEM;
254	goto err_usbtll_p2_fck;
255	}
256
257	platform_set_drvdata(pdev, tll);
258	pm_runtime_enable(dev);
259	pm_runtime_get_sync(dev);
260
261	spin_lock_irqsave(&tll->lock, flags);
262
263	ver = usbtll_read(base, OMAP_USBTLL_REVISION);
264	switch (ver) {
265	case OMAP_USBTLL_REV1:
266	case OMAP_USBTLL_REV2:
267	count = OMAP_TLL_CHANNEL_COUNT;
268	break;
269	case OMAP_USBTLL_REV3:
270	count = OMAP_REV2_TLL_CHANNEL_COUNT;
271	break;
272	default:
273	dev_err(dev, "TLL version failed\n");
274	ret = -ENODEV;
275	goto err_ioremap;
276	}
277
278	if (is_ehci_tll_mode(pdata->port_mode[0]) \|\|
279	is_ehci_tll_mode(pdata->port_mode[1]) \|\|
280	is_ehci_tll_mode(pdata->port_mode[2]) \|\|
281	is_ohci_port(pdata->port_mode[0]) \|\|
282	is_ohci_port(pdata->port_mode[1]) \|\|
283	is_ohci_port(pdata->port_mode[2])) {
284
285	/* Program Common TLL register */
286	reg = usbtll_read(base, OMAP_TLL_SHARED_CONF);
287	reg \|= (OMAP_TLL_SHARED_CONF_FCLK_IS_ON
288	\| OMAP_TLL_SHARED_CONF_USB_DIVRATION);
289	reg &= ~OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN;
290	reg &= ~OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN;
291
292	usbtll_write(base, OMAP_TLL_SHARED_CONF, reg);
293
294	/* Enable channels now */
295	for (i = 0; i < count; i++) {
296	reg = usbtll_read(base, OMAP_TLL_CHANNEL_CONF(i));
297
298	if (is_ohci_port(pdata->port_mode[i])) {
299	reg \|= ohci_omap3_fslsmode(pdata->port_mode[i])
300	<< OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT;
301	reg \|= OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS;
302	} else if (pdata->port_mode[i] ==
303	OMAP_EHCI_PORT_MODE_TLL) {
304	/*
305	* Disable AutoIdle, BitStuffing
306	* and use SDR Mode
307	*/
308	reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE
309	\| OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
310	\| OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE);
311	} else {
312	continue;
313	}
314	reg \|= OMAP_TLL_CHANNEL_CONF_CHANEN;
315	usbtll_write(base, OMAP_TLL_CHANNEL_CONF(i), reg);
316
317	usbtll_writeb(base,
318	OMAP_TLL_ULPI_SCRATCH_REGISTER(i),
319	0xbe);
320	}
321	}
322
323	err_ioremap:
324	spin_unlock_irqrestore(&tll->lock, flags);
325	iounmap(base);
326	pm_runtime_put_sync(dev);
327	tll_pdev = pdev;
328	if (!ret)
329	goto end;
330	pm_runtime_disable(dev);
331
332	err_usbtll_p2_fck:
333	clk_put(tll->usbtll_p2_fck);
334
335	err_usbtll_p1_fck:
336	clk_put(tll->usbtll_p1_fck);
337
338	err_tll:
339	kfree(tll);
340
341	end:
342	return ret;
343	}
344
345	/**
346	* usbtll_omap_remove - shutdown processing for UHH & TLL HCDs
347	* @pdev: USB Host Controller being removed
348	*
349	* Reverses the effect of usbtll_omap_probe().
350	*/
351	static int __devexit usbtll_omap_remove(struct platform_device *pdev)
352	{
353	struct usbtll_omap *tll = platform_get_drvdata(pdev);
354
355	clk_put(tll->usbtll_p2_fck);
356	clk_put(tll->usbtll_p1_fck);
357	pm_runtime_disable(&pdev->dev);
358	kfree(tll);
359	return 0;
360	}
361
362	static int usbtll_runtime_resume(struct device *dev)
363	{
364	struct usbtll_omap *tll = dev_get_drvdata(dev);
365	struct usbtll_omap_platform_data *pdata = &tll->platdata;
366	unsigned long flags;
367
368	dev_dbg(dev, "usbtll_runtime_resume\n");
369
370	if (!pdata) {
371	dev_dbg(dev, "missing platform_data\n");
372	return -ENODEV;
373	}
374
375	spin_lock_irqsave(&tll->lock, flags);
376
377	if (is_ehci_tll_mode(pdata->port_mode[0]))
378	clk_enable(tll->usbtll_p1_fck);
379
380	if (is_ehci_tll_mode(pdata->port_mode[1]))
381	clk_enable(tll->usbtll_p2_fck);
382
383	spin_unlock_irqrestore(&tll->lock, flags);
384
385	return 0;
386	}
387
388	static int usbtll_runtime_suspend(struct device *dev)
389	{
390	struct usbtll_omap *tll = dev_get_drvdata(dev);
391	struct usbtll_omap_platform_data *pdata = &tll->platdata;
392	unsigned long flags;
393
394	dev_dbg(dev, "usbtll_runtime_suspend\n");
395
396	if (!pdata) {
397	dev_dbg(dev, "missing platform_data\n");
398	return -ENODEV;
399	}
400
401	spin_lock_irqsave(&tll->lock, flags);
402
403	if (is_ehci_tll_mode(pdata->port_mode[0]))
404	clk_disable(tll->usbtll_p1_fck);
405
406	if (is_ehci_tll_mode(pdata->port_mode[1]))
407	clk_disable(tll->usbtll_p2_fck);
408
409	spin_unlock_irqrestore(&tll->lock, flags);
410
411	return 0;
412	}
413
414	static const struct dev_pm_ops usbtllomap_dev_pm_ops = {
415	SET_RUNTIME_PM_OPS(usbtll_runtime_suspend,
416	usbtll_runtime_resume,
417	NULL)
418	};
419
420	static struct platform_driver usbtll_omap_driver = {
421	.driver = {
422	.name = (char *)usbtll_driver_name,
423	.owner = THIS_MODULE,
424	.pm = &usbtllomap_dev_pm_ops,
425	},
426	.probe = usbtll_omap_probe,
84449216	427	.remove = usbtll_omap_remove,
16fa3dc7 KM	428	};
	429
	430	int omap_tll_enable(void)
	431	{
	432	if (!tll_pdev) {
	433	pr_err("missing omap usbhs tll platform_data\n");
	434	return -ENODEV;
	435	}
	436	return pm_runtime_get_sync(&tll_pdev->dev);
	437	}
	438	EXPORT_SYMBOL_GPL(omap_tll_enable);
	439
	440	int omap_tll_disable(void)
	441	{
	442	if (!tll_pdev) {
	443	pr_err("missing omap usbhs tll platform_data\n");
	444	return -ENODEV;
	445	}
	446	return pm_runtime_put_sync(&tll_pdev->dev);
	447	}
	448	EXPORT_SYMBOL_GPL(omap_tll_disable);
	449
	450	MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>");
	451	MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
	452	MODULE_LICENSE("GPL v2");
	453	MODULE_DESCRIPTION("usb tll driver for TI OMAP EHCI and OHCI controllers");
	454
	455	static int __init omap_usbtll_drvinit(void)
	456	{
	457	return platform_driver_register(&usbtll_omap_driver);
	458	}
	459
	460	/*
	461	* init before usbhs core driver;
	462	* The usbtll driver should be initialized before
	463	* the usbhs core driver probe function is called.
	464	*/
	465	fs_initcall(omap_usbtll_drvinit);
	466
	467	static void __exit omap_usbtll_drvexit(void)
	468	{
	469	platform_driver_unregister(&usbtll_omap_driver);
	470	}
	471	module_exit(omap_usbtll_drvexit);