u-boot/drivers/usb/host/ohci-generic.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

198 lines
4.3 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com>
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <dm/ofnode.h>
#include <generic-phy.h>
#include <reset.h>
#include "ohci.h"
#if !defined(CONFIG_USB_OHCI_NEW)
# error "Generic OHCI driver requires CONFIG_USB_OHCI_NEW"
#endif
struct generic_ohci {
ohci_t ohci;
struct clk *clocks; /* clock list */
struct reset_ctl *resets; /* reset list */
struct phy phy;
int clock_count; /* number of clock in clock list */
int reset_count; /* number of reset in reset list */
};
static int ohci_setup_phy(struct udevice *dev, int index)
{
struct generic_ohci *priv = dev_get_priv(dev);
int ret;
ret = generic_phy_get_by_index(dev, index, &priv->phy);
if (ret) {
if (ret != -ENOENT) {
dev_err(dev, "failed to get usb phy\n");
return ret;
}
} else {
ret = generic_phy_init(&priv->phy);
if (ret) {
dev_err(dev, "failed to init usb phy\n");
return ret;
}
ret = generic_phy_power_on(&priv->phy);
if (ret) {
dev_err(dev, "failed to power on usb phy\n");
return generic_phy_exit(&priv->phy);
}
}
return 0;
}
static int ohci_shutdown_phy(struct udevice *dev)
{
struct generic_ohci *priv = dev_get_priv(dev);
int ret = 0;
if (generic_phy_valid(&priv->phy)) {
ret = generic_phy_power_off(&priv->phy);
if (ret) {
dev_err(dev, "failed to power off usb phy\n");
return ret;
}
ret = generic_phy_exit(&priv->phy);
if (ret) {
dev_err(dev, "failed to power off usb phy\n");
return ret;
}
}
return 0;
}
static int ohci_usb_probe(struct udevice *dev)
{
struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev);
struct generic_ohci *priv = dev_get_priv(dev);
int i, err, ret, clock_nb, reset_nb;
err = 0;
priv->clock_count = 0;
clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells");
if (clock_nb > 0) {
priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
GFP_KERNEL);
if (!priv->clocks)
return -ENOMEM;
for (i = 0; i < clock_nb; i++) {
err = clk_get_by_index(dev, i, &priv->clocks[i]);
if (err < 0)
break;
err = clk_enable(&priv->clocks[i]);
if (err) {
dev_err(dev, "failed to enable clock %d\n", i);
clk_free(&priv->clocks[i]);
goto clk_err;
}
priv->clock_count++;
}
} else if (clock_nb != -ENOENT) {
dev_err(dev, "failed to get clock phandle(%d)\n", clock_nb);
return clock_nb;
}
priv->reset_count = 0;
reset_nb = dev_count_phandle_with_args(dev, "resets", "#reset-cells");
if (reset_nb > 0) {
priv->resets = devm_kcalloc(dev, reset_nb,
sizeof(struct reset_ctl),
GFP_KERNEL);
if (!priv->resets)
return -ENOMEM;
for (i = 0; i < reset_nb; i++) {
err = reset_get_by_index(dev, i, &priv->resets[i]);
if (err < 0)
break;
err = reset_deassert(&priv->resets[i]);
if (err) {
dev_err(dev, "failed to deassert reset %d\n", i);
reset_free(&priv->resets[i]);
goto reset_err;
}
priv->reset_count++;
}
} else if (reset_nb != -ENOENT) {
dev_err(dev, "failed to get reset phandle(%d)\n", reset_nb);
goto clk_err;
}
err = ohci_setup_phy(dev, 0);
if (err)
goto reset_err;
err = ohci_register(dev, regs);
if (err)
goto phy_err;
return 0;
phy_err:
ret = ohci_shutdown_phy(dev);
if (ret)
dev_err(dev, "failed to shutdown usb phy\n");
reset_err:
ret = reset_release_all(priv->resets, priv->reset_count);
if (ret)
dev_err(dev, "failed to assert all resets\n");
clk_err:
ret = clk_release_all(priv->clocks, priv->clock_count);
if (ret)
dev_err(dev, "failed to disable all clocks\n");
return err;
}
static int ohci_usb_remove(struct udevice *dev)
{
struct generic_ohci *priv = dev_get_priv(dev);
int ret;
ret = ohci_deregister(dev);
if (ret)
return ret;
ret = ohci_shutdown_phy(dev);
if (ret)
return ret;
ret = reset_release_all(priv->resets, priv->reset_count);
if (ret)
return ret;
return clk_release_all(priv->clocks, priv->clock_count);
}
static const struct udevice_id ohci_usb_ids[] = {
{ .compatible = "generic-ohci" },
{ }
};
U_BOOT_DRIVER(ohci_generic) = {
.name = "ohci_generic",
.id = UCLASS_USB,
.of_match = ohci_usb_ids,
.probe = ohci_usb_probe,
.remove = ohci_usb_remove,
.ops = &ohci_usb_ops,
.priv_auto_alloc_size = sizeof(struct generic_ohci),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};