[people/ms/u-boot.git] / drivers / usb / musb / davinci.c

/*
 * TI's Davinci platform specific USB wrapper functions.
 *
 * Copyright (c) 2008 Texas Instruments
 *
 * SPDX-License-Identifier:	GPL-2.0+
 *
 * Author: Thomas Abraham t-abraham@ti.com, Texas Instruments
 */

#include <common.h>
#include <asm/io.h>
#include "davinci.h"
#include <asm/arch/hardware.h>

#if !defined(CONFIG_DV_USBPHY_CTL)
#define CONFIG_DV_USBPHY_CTL (USBPHY_SESNDEN | USBPHY_VBDTCTEN)
#endif

/* MUSB platform configuration */
struct musb_config musb_cfg = {
	.regs		= (struct musb_regs *)MENTOR_USB0_BASE,
	.timeout	= DAVINCI_USB_TIMEOUT,
	.musb_speed	= 0,
};

/* MUSB module register overlay */
struct davinci_usb_regs *dregs;

/*
 * Enable the USB phy
 */
static u8 phy_on(void)
{
	u32 timeout;
#ifdef DAVINCI_DM365EVM
	u32 val;
#endif
	/* Wait until the USB phy is turned on */
#ifdef DAVINCI_DM365EVM
	writel(USBPHY_PHY24MHZ | USBPHY_SESNDEN |
			USBPHY_VBDTCTEN, USBPHY_CTL_PADDR);
#else
	writel(CONFIG_DV_USBPHY_CTL, USBPHY_CTL_PADDR);
#endif
	timeout = musb_cfg.timeout;

#ifdef DAVINCI_DM365EVM
	/* Set the ownership of GIO33 to USB */
	val = readl(PINMUX4);
	val &= ~(PINMUX4_USBDRVBUS_BITCLEAR);
	val |= PINMUX4_USBDRVBUS_BITSET;
	writel(val, PINMUX4);
#endif
	while (timeout--)
		if (readl(USBPHY_CTL_PADDR) & USBPHY_PHYCLKGD)
			return 1;

	/* USB phy was not turned on */
	return 0;
}

/*
 * Disable the USB phy
 */
static void phy_off(void)
{
	/* powerdown the on-chip PHY and its oscillator */
	writel(USBPHY_OSCPDWN | USBPHY_PHYPDWN, USBPHY_CTL_PADDR);
}

void __enable_vbus(void)
{
	/*
	 *  nothing to do, vbus is handled through the cpu.
	 *  Define this function in board code, if it is
	 *  different on your board.
	 */
}
void  enable_vbus(void)
	__attribute__((weak, alias("__enable_vbus")));

/*
 * This function performs Davinci platform specific initialization for usb0.
 */
int musb_platform_init(void)
{
	u32  revision;

	/* enable USB VBUS */
	enable_vbus();

	/* start the on-chip USB phy and its pll */
	if (!phy_on())
		return -1;

	/* reset the controller */
	dregs = (struct davinci_usb_regs *)DAVINCI_USB0_BASE;
	writel(1, &dregs->ctrlr);
	udelay(5000);

	/* Returns zero if e.g. not clocked */
	revision = readl(&dregs->version);
	if (!revision)
		return -1;

	/* Disable all interrupts */
	writel(DAVINCI_USB_USBINT_MASK | DAVINCI_USB_RXINT_MASK |
			DAVINCI_USB_TXINT_MASK , &dregs->intmsksetr);
	return 0;
}

/*
 * This function performs Davinci platform specific deinitialization for usb0.
 */
void musb_platform_deinit(void)
{
	/* Turn of the phy */
	phy_off();

	/* flush any interrupts */
	writel(DAVINCI_USB_USBINT_MASK | DAVINCI_USB_TXINT_MASK |
			DAVINCI_USB_RXINT_MASK , &dregs->intclrr);
}
Commit	Line	Data
e142e9f3 TA	1	/*
	2	* TI's Davinci platform specific USB wrapper functions.
	3	*
	4	* Copyright (c) 2008 Texas Instruments
	5	*
1a459660	6	* SPDX-License-Identifier: GPL-2.0+
e142e9f3 TA	7	*
	8	* Author: Thomas Abraham t-abraham@ti.com, Texas Instruments
	9	*/
	10
	11	#include <common.h>
	12	#include <asm/io.h>
2731b9a8	13	#include "davinci.h"
6e20e64f	14	#include <asm/arch/hardware.h>
e142e9f3	15
1fa892c6 HS	16	#if !defined(CONFIG_DV_USBPHY_CTL)
	17	#define CONFIG_DV_USBPHY_CTL (USBPHY_SESNDEN \| USBPHY_VBDTCTEN)
	18	#endif
	19
e142e9f3 TA	20	/* MUSB platform configuration */
e142e9f3 TA	21	struct musb_config musb_cfg = {
bbf4c01e AKG	22	.regs = (struct musb_regs *)MENTOR_USB0_BASE,
	23	.timeout = DAVINCI_USB_TIMEOUT,
	24	.musb_speed = 0,
e142e9f3 TA	25	};
	26
	27	/* MUSB module register overlay */
	28	struct davinci_usb_regs *dregs;
	29
	30	/*
	31	* Enable the USB phy
	32	*/
	33	static u8 phy_on(void)
	34	{
	35	u32 timeout;
6e20e64f PS	36	#ifdef DAVINCI_DM365EVM
	37	u32 val;
	38	#endif
e142e9f3	39	/* Wait until the USB phy is turned on */
6e20e64f PS	40	#ifdef DAVINCI_DM365EVM
	41	writel(USBPHY_PHY24MHZ \| USBPHY_SESNDEN \|
	42	USBPHY_VBDTCTEN, USBPHY_CTL_PADDR);
	43	#else
1fa892c6	44	writel(CONFIG_DV_USBPHY_CTL, USBPHY_CTL_PADDR);
6e20e64f	45	#endif
e142e9f3	46	timeout = musb_cfg.timeout;
6e20e64f PS	47
	48	#ifdef DAVINCI_DM365EVM
	49	/* Set the ownership of GIO33 to USB */
	50	val = readl(PINMUX4);
	51	val &= ~(PINMUX4_USBDRVBUS_BITCLEAR);
	52	val \|= PINMUX4_USBDRVBUS_BITSET;
	53	writel(val, PINMUX4);
	54	#endif
e142e9f3 TA	55	while (timeout--)
	56	if (readl(USBPHY_CTL_PADDR) & USBPHY_PHYCLKGD)
	57	return 1;
	58
	59	/* USB phy was not turned on */
	60	return 0;
	61	}
	62
	63	/*
	64	* Disable the USB phy
	65	*/
	66	static void phy_off(void)
	67	{
	68	/* powerdown the on-chip PHY and its oscillator */
	69	writel(USBPHY_OSCPDWN \| USBPHY_PHYPDWN, USBPHY_CTL_PADDR);
	70	}
	71
4ebe2080 HS	72	void __enable_vbus(void)
	73	{
	74	/*
	75	* nothing to do, vbus is handled through the cpu.
	76	* Define this function in board code, if it is
	77	* different on your board.
	78	*/
	79	}
	80	void enable_vbus(void)
	81	__attribute__((weak, alias("__enable_vbus")));
	82
e142e9f3 TA	83	/*
	84	* This function performs Davinci platform specific initialization for usb0.
	85	*/
	86	int musb_platform_init(void)
	87	{
	88	u32 revision;
	89
	90	/* enable USB VBUS */
	91	enable_vbus();
4ebe2080	92
e142e9f3 TA	93	/* start the on-chip USB phy and its pll */
	94	if (!phy_on())
	95	return -1;
	96
	97	/* reset the controller */
	98	dregs = (struct davinci_usb_regs *)DAVINCI_USB0_BASE;
	99	writel(1, &dregs->ctrlr);
	100	udelay(5000);
	101
	102	/* Returns zero if e.g. not clocked */
	103	revision = readl(&dregs->version);
	104	if (!revision)
	105	return -1;
	106
	107	/* Disable all interrupts */
	108	writel(DAVINCI_USB_USBINT_MASK \| DAVINCI_USB_RXINT_MASK \|
	109	DAVINCI_USB_TXINT_MASK , &dregs->intmsksetr);
	110	return 0;
	111	}
	112
	113	/*
	114	* This function performs Davinci platform specific deinitialization for usb0.
	115	*/
	116	void musb_platform_deinit(void)
	117	{
	118	/* Turn of the phy */
	119	phy_off();
	120
	121	/* flush any interrupts */
	122	writel(DAVINCI_USB_USBINT_MASK \| DAVINCI_USB_TXINT_MASK \|
	123	DAVINCI_USB_RXINT_MASK , &dregs->intclrr);
	124	}