u-boot/drivers/usb/host/ohci-generic.c
Simon Glass 41575d8e4c dm: treewide: Rename auto_alloc_size members to be shorter
This construct is quite long-winded. In earlier days it made some sense
since auto-allocation was a strange concept. But with driver model now
used pretty universally, we can shorten this to 'auto'. This reduces
verbosity and makes it easier to read.

Coincidentally it also ensures that every declaration is on one line,
thus making dtoc's job easier.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 08:00:25 -07:00

203 lines
4.4 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 <log.h>
#include <dm/device_compat.h>
#include <dm/devres.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_dbg(dev, "failed to init usb phy\n");
return ret;
}
ret = generic_phy_power_on(&priv->phy);
if (ret) {
dev_dbg(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_dbg(dev, "failed to power off usb phy\n");
return ret;
}
ret = generic_phy_exit(&priv->phy);
if (ret) {
dev_dbg(dev, "failed to power off usb phy\n");
return ret;
}
}
return 0;
}
static int ohci_usb_probe(struct udevice *dev)
{
struct ohci_regs *regs = dev_read_addr_ptr(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",
0);
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 && err != -ENOSYS) {
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",
0);
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 = sizeof(struct generic_ohci),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};