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usb: ulpi: Remove unused omap-ulpi-viewport driver

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The last platform to enable this driver was removed in 2019. Remove this
unused code and documentation now.

Signed-off-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Tom Rini
2025-03-14 19:27:35 -06:00
committed by Marek Vasut
parent 068f83499c
commit cd9c8814b0
4 changed files with 0 additions and 104 deletions
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27
doc/README.omap-ulpi-viewport
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@@ -1,27 +0,0 @@
Reference code ""drivers/usb/ulpi/omap-ulpi-viewport.c"
Contains the ulpi read write api's to perform
any ulpi phy port access on omap platform.
On omap ehci reg map contains INSNREG05_ULPI
register which offers the ulpi phy access so
any ulpi phy commands should be passsed using this
register.
omap-ulpi-viewport.c is a low level function
implementation of "drivers/usb/ulpi/ulpi.c"
To enable and use omap-ulpi-viewport.c
we require CONFIG_USB_ULPI_VIEWPORT_OMAP and
CONFIG_USB_ULPI be enabled in config file.
Any ulpi ops request can be done with ulpi.c
and soc specific binding and usage is done with
omap-ulpi-viewport implementation.
Ex: scenario:
omap-ehci driver code requests for ulpi phy reset if
ehci is used in phy mode, which will call ulpi phy reset
the ulpi phy reset does ulpi_read/write from viewport
implementation which will do ulpi reset using the
INSNREG05_ULPI register.

5
drivers/usb/ulpi/Kconfig
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@@ -14,11 +14,6 @@ config USB_ULPI_VIEWPORT
Support generic ULPI Viewport implementation that is used on
some Tegra and Snapdragon devices.
config USB_ULPI_VIEWPORT_OMAP
bool "OMAP ULPI Viewport"
help
Support ULPI Viewport implementation that is used on OMAP devices.
endchoice
config USB_ULPI

1
drivers/usb/ulpi/Makefile
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@@ -4,4 +4,3 @@
obj-$(CONFIG_USB_ULPI) += ulpi.o
obj-$(CONFIG_USB_ULPI_VIEWPORT) += ulpi-viewport.o
obj-$(CONFIG_USB_ULPI_VIEWPORT_OMAP) += omap-ulpi-viewport.o

71
drivers/usb/ulpi/omap-ulpi-viewport.c
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@@ -1,71 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* OMAP ulpi viewport support
* Based on drivers/usb/ulpi/ulpi-viewport.c
*
* Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com
* Author: Govindraj R <govindraj.raja@ti.com>
*/
#include <log.h>
#include <asm/io.h>
#include <linux/delay.h>
#include <usb/ulpi.h>
#define OMAP_ULPI_WR_OPSEL (2 << 22)
#define OMAP_ULPI_RD_OPSEL (3 << 22)
#define OMAP_ULPI_START (1 << 31)
/*
* Wait for having ulpi in done state
*/
static int ulpi_wait(struct ulpi_viewport *ulpi_vp, u32 mask)
{
int timeout = CFG_USB_ULPI_TIMEOUT;
while (--timeout) {
if (!(readl(ulpi_vp->viewport_addr) & mask))
return 0;
udelay(1);
}
return ULPI_ERROR;
}
/*
* Issue a ULPI read/write request
*/
static int ulpi_request(struct ulpi_viewport *ulpi_vp, u32 value)
{
int err;
writel(value, ulpi_vp->viewport_addr);
err = ulpi_wait(ulpi_vp, OMAP_ULPI_START);
if (err)
debug("ULPI request timed out\n");
return err;
}
int ulpi_write(struct ulpi_viewport *ulpi_vp, u8 *reg, u32 value)
{
u32 val = OMAP_ULPI_START | (((ulpi_vp->port_num + 1) & 0xf) << 24) |
OMAP_ULPI_WR_OPSEL | ((u32)reg << 16) | (value & 0xff);
return ulpi_request(ulpi_vp, val);
}
u32 ulpi_read(struct ulpi_viewport *ulpi_vp, u8 *reg)
{
int err;
u32 val = OMAP_ULPI_START | (((ulpi_vp->port_num + 1) & 0xf) << 24) |
OMAP_ULPI_RD_OPSEL | ((u32)reg << 16);
err = ulpi_request(ulpi_vp, val);
if (err)
return err;
return readl(ulpi_vp->viewport_addr) & 0xff;
}