Contributors: 6
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Benoit Goby |
256 |
88.89% |
1 |
12.50% |
| Chunfeng Yun |
16 |
5.56% |
1 |
12.50% |
| Manjunath Goudar |
8 |
2.78% |
1 |
12.50% |
| Ajay Kumar Gupta |
3 |
1.04% |
1 |
12.50% |
| Heikki Krogerus |
3 |
1.04% |
2 |
25.00% |
| Greg Kroah-Hartman |
2 |
0.69% |
2 |
25.00% |
| Total |
288 |
|
8 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2011 Google, Inc.
*/
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/usb.h>
#include <linux/io.h>
#include <linux/iopoll.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)
{
u32 val;
return readl_poll_timeout_atomic(view, val, !(val & mask), 1, 2000);
}
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,
};
EXPORT_SYMBOL_GPL(ulpi_viewport_access_ops);