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/*
* Copyright (c) 2009 Wind River Systems, Inc.
* Tom Rix <Tom.Rix@windriver.com>
*
* This is file is based on
* repository git.gitorious.org/u-boot-omap3/mainline.git,
* branch omap3-dev-usb, file drivers/usb/host/omap3530_usb.c
*
* This is the unique part of its copyright :
*
* ------------------------------------------------------------------------
*
* Copyright (c) 2009 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
*/
#include <twl4030.h>
#include "omap3.h"
static int platform_needs_initialization = 1;
struct musb_config musb_cfg = {
(struct musb_regs *)MENTOR_USB0_BASE,
OMAP3_USB_TIMEOUT,
0
};
/*
* OMAP3 USB OTG registers.
*/
struct omap3_otg_regs {
u32 revision;
u32 sysconfig;
u32 sysstatus;
u32 interfsel;
u32 simenable;
u32 forcestdby;
};
static struct omap3_otg_regs *otg;
#define OMAP3_OTG_SYSCONFIG_SMART_STANDBY_MODE 0x2000
#define OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE 0x1000
#define OMAP3_OTG_SYSCONFIG_SMART_IDLE_MODE 0x0010
#define OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE 0x0008
#define OMAP3_OTG_SYSCONFIG_ENABLEWAKEUP 0x0004
#define OMAP3_OTG_SYSCONFIG_SOFTRESET 0x0002
#define OMAP3_OTG_SYSCONFIG_AUTOIDLE 0x0001
#define OMAP3_OTG_SYSSTATUS_RESETDONE 0x0001
#define OMAP3_OTG_INTERFSEL_OMAP 0x0001
#define OMAP3_OTG_FORCESTDBY_STANDBY 0x0001
#ifdef DEBUG_MUSB_OMAP3
static void musb_db_otg_regs(void)
{
u32 l;
l = readl(&otg->revision);
serial_printf("OTG_REVISION 0x%x\n", l);
l = readl(&otg->sysconfig);
serial_printf("OTG_SYSCONFIG 0x%x\n", l);
l = readl(&otg->sysstatus);
serial_printf("OTG_SYSSTATUS 0x%x\n", l);
l = readl(&otg->interfsel);
serial_printf("OTG_INTERFSEL 0x%x\n", l);
l = readl(&otg->forcestdby);
serial_printf("OTG_FORCESTDBY 0x%x\n", l);
}
#endif
int musb_platform_init(void)
{
int ret = -1;
if (platform_needs_initialization) {
u32 stdby;
if (twl4030_usb_ulpi_init()) {
serial_printf("ERROR: %s Could not initialize PHY\n",
__PRETTY_FUNCTION__);
goto end;
}
otg = (struct omap3_otg_regs *)OMAP3_OTG_BASE;
/* Set OTG to always be on */
writel(OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE |
OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE, &otg->sysconfig);
/* Set the interface */
writel(OMAP3_OTG_INTERFSEL_OMAP, &otg->interfsel);
/* Clear force standby */
stdby = readl(&otg->forcestdby);
stdby &= ~OMAP3_OTG_FORCESTDBY_STANDBY;
writel(stdby, &otg->forcestdby);
platform_needs_initialization = 0;
}
ret = platform_needs_initialization;
end:
return ret;
}
void musb_platform_deinit(void)
{
/* noop */
}
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