mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-09 04:36:16 +09:00
bbf4c01efc
Changed musb_config initialization for omap3.c, davinci.c and da8xx.c using name of structure fields. This would cause the uninitialized field to be null by default and thus would help in avoiding to init some flags required to be set only for a few selected platforms. CC: Remy Bohmer <linux@bohmer.net> Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
/*
|
|
* TI's Davinci platform specific USB wrapper functions.
|
|
*
|
|
* Copyright (c) 2008 Texas Instruments
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* 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, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*
|
|
* Author: Thomas Abraham t-abraham@ti.com, Texas Instruments
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include "davinci.h"
|
|
#include <asm/arch/hardware.h>
|
|
|
|
/* 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(USBPHY_SESNDEN | USBPHY_VBDTCTEN, 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);
|
|
}
|
|
|
|
/*
|
|
* This function performs Davinci platform specific initialization for usb0.
|
|
*/
|
|
int musb_platform_init(void)
|
|
{
|
|
u32 revision;
|
|
|
|
/* enable USB VBUS */
|
|
#ifndef DAVINCI_DM365EVM
|
|
enable_vbus();
|
|
#endif
|
|
/* 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);
|
|
}
|