mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 13:43:55 +08:00
39ef6340c7
Rename mach-imx/include/mach/ulpi.h to mach-imx/ulpi.h, and update users to include ulpi.h rather than mach/ulpi.h. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Arnd Bergmann <arnd@arndb.de>
119 lines
3.1 KiB
C
119 lines
3.1 KiB
C
/*
|
|
* Copyright 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
|
|
* Copyright 2009 Daniel Mack <daniel@caiaq.de>
|
|
*
|
|
* 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., 51 Franklin Street, Fifth Floor, Boston,
|
|
* MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/io.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/usb/otg.h>
|
|
#include <linux/usb/ulpi.h>
|
|
|
|
#include "ulpi.h"
|
|
|
|
/* ULPIVIEW register bits */
|
|
#define ULPIVW_WU (1 << 31) /* Wakeup */
|
|
#define ULPIVW_RUN (1 << 30) /* read/write run */
|
|
#define ULPIVW_WRITE (1 << 29) /* 0 = read 1 = write */
|
|
#define ULPIVW_SS (1 << 27) /* SyncState */
|
|
#define ULPIVW_PORT_MASK 0x07 /* Port field */
|
|
#define ULPIVW_PORT_SHIFT 24
|
|
#define ULPIVW_ADDR_MASK 0xff /* data address field */
|
|
#define ULPIVW_ADDR_SHIFT 16
|
|
#define ULPIVW_RDATA_MASK 0xff /* read data field */
|
|
#define ULPIVW_RDATA_SHIFT 8
|
|
#define ULPIVW_WDATA_MASK 0xff /* write data field */
|
|
#define ULPIVW_WDATA_SHIFT 0
|
|
|
|
static int ulpi_poll(void __iomem *view, u32 bit)
|
|
{
|
|
int timeout = 10000;
|
|
|
|
while (timeout--) {
|
|
u32 data = __raw_readl(view);
|
|
|
|
if (!(data & bit))
|
|
return 0;
|
|
|
|
cpu_relax();
|
|
};
|
|
|
|
printk(KERN_WARNING "timeout polling for ULPI device\n");
|
|
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
static int ulpi_read(struct usb_phy *otg, u32 reg)
|
|
{
|
|
int ret;
|
|
void __iomem *view = otg->io_priv;
|
|
|
|
/* make sure interface is running */
|
|
if (!(__raw_readl(view) & ULPIVW_SS)) {
|
|
__raw_writel(ULPIVW_WU, view);
|
|
|
|
/* wait for wakeup */
|
|
ret = ulpi_poll(view, ULPIVW_WU);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
/* read the register */
|
|
__raw_writel((ULPIVW_RUN | (reg << ULPIVW_ADDR_SHIFT)), view);
|
|
|
|
/* wait for completion */
|
|
ret = ulpi_poll(view, ULPIVW_RUN);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return (__raw_readl(view) >> ULPIVW_RDATA_SHIFT) & ULPIVW_RDATA_MASK;
|
|
}
|
|
|
|
static int ulpi_write(struct usb_phy *otg, u32 val, u32 reg)
|
|
{
|
|
int ret;
|
|
void __iomem *view = otg->io_priv;
|
|
|
|
/* make sure the interface is running */
|
|
if (!(__raw_readl(view) & ULPIVW_SS)) {
|
|
__raw_writel(ULPIVW_WU, view);
|
|
/* wait for wakeup */
|
|
ret = ulpi_poll(view, ULPIVW_WU);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
__raw_writel((ULPIVW_RUN | ULPIVW_WRITE |
|
|
(reg << ULPIVW_ADDR_SHIFT) |
|
|
((val & ULPIVW_WDATA_MASK) << ULPIVW_WDATA_SHIFT)), view);
|
|
|
|
/* wait for completion */
|
|
return ulpi_poll(view, ULPIVW_RUN);
|
|
}
|
|
|
|
struct usb_phy_io_ops mxc_ulpi_access_ops = {
|
|
.read = ulpi_read,
|
|
.write = ulpi_write,
|
|
};
|
|
EXPORT_SYMBOL_GPL(mxc_ulpi_access_ops);
|
|
|
|
struct usb_phy *imx_otg_ulpi_create(unsigned int flags)
|
|
{
|
|
return otg_ulpi_create(&mxc_ulpi_access_ops, flags);
|
|
}
|