94ae98433a
this will make sure that we have sensible names for all phy drivers. Current situation was already quite bad with too generic names being used. Signed-off-by: Felipe Balbi <balbi@ti.com>
80 lines
2 KiB
C
80 lines
2 KiB
C
/*
|
|
* Copyright (C) 2011 Google, Inc.
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/io.h>
|
|
#include <linux/usb/otg.h>
|
|
#include <linux/usb/ulpi.h>
|
|
|
|
#define ULPI_VIEW_WAKEUP (1 << 31)
|
|
#define ULPI_VIEW_RUN (1 << 30)
|
|
#define ULPI_VIEW_WRITE (1 << 29)
|
|
#define ULPI_VIEW_READ (0 << 29)
|
|
#define ULPI_VIEW_ADDR(x) (((x) & 0xff) << 16)
|
|
#define ULPI_VIEW_DATA_READ(x) (((x) >> 8) & 0xff)
|
|
#define ULPI_VIEW_DATA_WRITE(x) ((x) & 0xff)
|
|
|
|
static int ulpi_viewport_wait(void __iomem *view, u32 mask)
|
|
{
|
|
unsigned long usec = 2000;
|
|
|
|
while (usec--) {
|
|
if (!(readl(view) & mask))
|
|
return 0;
|
|
|
|
udelay(1);
|
|
};
|
|
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
static int ulpi_viewport_read(struct usb_phy *otg, u32 reg)
|
|
{
|
|
int ret;
|
|
void __iomem *view = otg->io_priv;
|
|
|
|
writel(ULPI_VIEW_WAKEUP | ULPI_VIEW_WRITE, view);
|
|
ret = ulpi_viewport_wait(view, ULPI_VIEW_WAKEUP);
|
|
if (ret)
|
|
return ret;
|
|
|
|
writel(ULPI_VIEW_RUN | ULPI_VIEW_READ | ULPI_VIEW_ADDR(reg), view);
|
|
ret = ulpi_viewport_wait(view, ULPI_VIEW_RUN);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return ULPI_VIEW_DATA_READ(readl(view));
|
|
}
|
|
|
|
static int ulpi_viewport_write(struct usb_phy *otg, u32 val, u32 reg)
|
|
{
|
|
int ret;
|
|
void __iomem *view = otg->io_priv;
|
|
|
|
writel(ULPI_VIEW_WAKEUP | ULPI_VIEW_WRITE, view);
|
|
ret = ulpi_viewport_wait(view, ULPI_VIEW_WAKEUP);
|
|
if (ret)
|
|
return ret;
|
|
|
|
writel(ULPI_VIEW_RUN | ULPI_VIEW_WRITE | ULPI_VIEW_DATA_WRITE(val) |
|
|
ULPI_VIEW_ADDR(reg), view);
|
|
|
|
return ulpi_viewport_wait(view, ULPI_VIEW_RUN);
|
|
}
|
|
|
|
struct usb_phy_io_ops ulpi_viewport_access_ops = {
|
|
.read = ulpi_viewport_read,
|
|
.write = ulpi_viewport_write,
|
|
};
|