linux-stable/drivers/usb/phy/phy-ulpi.c
Greg Kroah-Hartman fb3967b95c USB: phy: Remove redundant license text
Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner.  So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text.  And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-07 15:45:01 +01:00

273 lines
5.8 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Generic ULPI USB transceiver support
*
* Copyright (C) 2009 Daniel Mack <daniel@caiaq.de>
*
* Based on sources from
*
* Sascha Hauer <s.hauer@pengutronix.de>
* Freescale Semiconductors
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <linux/usb.h>
#include <linux/usb/otg.h>
#include <linux/usb/ulpi.h>
struct ulpi_info {
unsigned int id;
char *name;
};
#define ULPI_ID(vendor, product) (((vendor) << 16) | (product))
#define ULPI_INFO(_id, _name) \
{ \
.id = (_id), \
.name = (_name), \
}
/* ULPI hardcoded IDs, used for probing */
static struct ulpi_info ulpi_ids[] = {
ULPI_INFO(ULPI_ID(0x04cc, 0x1504), "NXP ISP1504"),
ULPI_INFO(ULPI_ID(0x0424, 0x0006), "SMSC USB331x"),
ULPI_INFO(ULPI_ID(0x0424, 0x0007), "SMSC USB3320"),
ULPI_INFO(ULPI_ID(0x0424, 0x0009), "SMSC USB334x"),
ULPI_INFO(ULPI_ID(0x0451, 0x1507), "TI TUSB1210"),
};
static int ulpi_set_otg_flags(struct usb_phy *phy)
{
unsigned int flags = ULPI_OTG_CTRL_DP_PULLDOWN |
ULPI_OTG_CTRL_DM_PULLDOWN;
if (phy->flags & ULPI_OTG_ID_PULLUP)
flags |= ULPI_OTG_CTRL_ID_PULLUP;
/*
* ULPI Specification rev.1.1 default
* for Dp/DmPulldown is enabled.
*/
if (phy->flags & ULPI_OTG_DP_PULLDOWN_DIS)
flags &= ~ULPI_OTG_CTRL_DP_PULLDOWN;
if (phy->flags & ULPI_OTG_DM_PULLDOWN_DIS)
flags &= ~ULPI_OTG_CTRL_DM_PULLDOWN;
if (phy->flags & ULPI_OTG_EXTVBUSIND)
flags |= ULPI_OTG_CTRL_EXTVBUSIND;
return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL);
}
static int ulpi_set_fc_flags(struct usb_phy *phy)
{
unsigned int flags = 0;
/*
* ULPI Specification rev.1.1 default
* for XcvrSelect is Full Speed.
*/
if (phy->flags & ULPI_FC_HS)
flags |= ULPI_FUNC_CTRL_HIGH_SPEED;
else if (phy->flags & ULPI_FC_LS)
flags |= ULPI_FUNC_CTRL_LOW_SPEED;
else if (phy->flags & ULPI_FC_FS4LS)
flags |= ULPI_FUNC_CTRL_FS4LS;
else
flags |= ULPI_FUNC_CTRL_FULL_SPEED;
if (phy->flags & ULPI_FC_TERMSEL)
flags |= ULPI_FUNC_CTRL_TERMSELECT;
/*
* ULPI Specification rev.1.1 default
* for OpMode is Normal Operation.
*/
if (phy->flags & ULPI_FC_OP_NODRV)
flags |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
else if (phy->flags & ULPI_FC_OP_DIS_NRZI)
flags |= ULPI_FUNC_CTRL_OPMODE_DISABLE_NRZI;
else if (phy->flags & ULPI_FC_OP_NSYNC_NEOP)
flags |= ULPI_FUNC_CTRL_OPMODE_NOSYNC_NOEOP;
else
flags |= ULPI_FUNC_CTRL_OPMODE_NORMAL;
/*
* ULPI Specification rev.1.1 default
* for SuspendM is Powered.
*/
flags |= ULPI_FUNC_CTRL_SUSPENDM;
return usb_phy_io_write(phy, flags, ULPI_FUNC_CTRL);
}
static int ulpi_set_ic_flags(struct usb_phy *phy)
{
unsigned int flags = 0;
if (phy->flags & ULPI_IC_AUTORESUME)
flags |= ULPI_IFC_CTRL_AUTORESUME;
if (phy->flags & ULPI_IC_EXTVBUS_INDINV)
flags |= ULPI_IFC_CTRL_EXTERNAL_VBUS;
if (phy->flags & ULPI_IC_IND_PASSTHRU)
flags |= ULPI_IFC_CTRL_PASSTHRU;
if (phy->flags & ULPI_IC_PROTECT_DIS)
flags |= ULPI_IFC_CTRL_PROTECT_IFC_DISABLE;
return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL);
}
static int ulpi_set_flags(struct usb_phy *phy)
{
int ret;
ret = ulpi_set_otg_flags(phy);
if (ret)
return ret;
ret = ulpi_set_ic_flags(phy);
if (ret)
return ret;
return ulpi_set_fc_flags(phy);
}
static int ulpi_check_integrity(struct usb_phy *phy)
{
int ret, i;
unsigned int val = 0x55;
for (i = 0; i < 2; i++) {
ret = usb_phy_io_write(phy, val, ULPI_SCRATCH);
if (ret < 0)
return ret;
ret = usb_phy_io_read(phy, ULPI_SCRATCH);
if (ret < 0)
return ret;
if (ret != val) {
pr_err("ULPI integrity check: failed!");
return -ENODEV;
}
val = val << 1;
}
pr_info("ULPI integrity check: passed.\n");
return 0;
}
static int ulpi_init(struct usb_phy *phy)
{
int i, vid, pid, ret;
u32 ulpi_id = 0;
for (i = 0; i < 4; i++) {
ret = usb_phy_io_read(phy, ULPI_PRODUCT_ID_HIGH - i);
if (ret < 0)
return ret;
ulpi_id = (ulpi_id << 8) | ret;
}
vid = ulpi_id & 0xffff;
pid = ulpi_id >> 16;
pr_info("ULPI transceiver vendor/product ID 0x%04x/0x%04x\n", vid, pid);
for (i = 0; i < ARRAY_SIZE(ulpi_ids); i++) {
if (ulpi_ids[i].id == ULPI_ID(vid, pid)) {
pr_info("Found %s ULPI transceiver.\n",
ulpi_ids[i].name);
break;
}
}
ret = ulpi_check_integrity(phy);
if (ret)
return ret;
return ulpi_set_flags(phy);
}
static int ulpi_set_host(struct usb_otg *otg, struct usb_bus *host)
{
struct usb_phy *phy = otg->usb_phy;
unsigned int flags = usb_phy_io_read(phy, ULPI_IFC_CTRL);
if (!host) {
otg->host = NULL;
return 0;
}
otg->host = host;
flags &= ~(ULPI_IFC_CTRL_6_PIN_SERIAL_MODE |
ULPI_IFC_CTRL_3_PIN_SERIAL_MODE |
ULPI_IFC_CTRL_CARKITMODE);
if (phy->flags & ULPI_IC_6PIN_SERIAL)
flags |= ULPI_IFC_CTRL_6_PIN_SERIAL_MODE;
else if (phy->flags & ULPI_IC_3PIN_SERIAL)
flags |= ULPI_IFC_CTRL_3_PIN_SERIAL_MODE;
else if (phy->flags & ULPI_IC_CARKIT)
flags |= ULPI_IFC_CTRL_CARKITMODE;
return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL);
}
static int ulpi_set_vbus(struct usb_otg *otg, bool on)
{
struct usb_phy *phy = otg->usb_phy;
unsigned int flags = usb_phy_io_read(phy, ULPI_OTG_CTRL);
flags &= ~(ULPI_OTG_CTRL_DRVVBUS | ULPI_OTG_CTRL_DRVVBUS_EXT);
if (on) {
if (phy->flags & ULPI_OTG_DRVVBUS)
flags |= ULPI_OTG_CTRL_DRVVBUS;
if (phy->flags & ULPI_OTG_DRVVBUS_EXT)
flags |= ULPI_OTG_CTRL_DRVVBUS_EXT;
}
return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL);
}
struct usb_phy *
otg_ulpi_create(struct usb_phy_io_ops *ops,
unsigned int flags)
{
struct usb_phy *phy;
struct usb_otg *otg;
phy = kzalloc(sizeof(*phy), GFP_KERNEL);
if (!phy)
return NULL;
otg = kzalloc(sizeof(*otg), GFP_KERNEL);
if (!otg) {
kfree(phy);
return NULL;
}
phy->label = "ULPI";
phy->flags = flags;
phy->io_ops = ops;
phy->otg = otg;
phy->init = ulpi_init;
otg->usb_phy = phy;
otg->set_host = ulpi_set_host;
otg->set_vbus = ulpi_set_vbus;
return phy;
}
EXPORT_SYMBOL_GPL(otg_ulpi_create);