+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#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 = (struct ohci_regs *)dev_get_addr(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;
- return ohci_register(dev, regs);
+ 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)
{
- return ohci_deregister(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[] = {
.probe = ohci_usb_probe,
.remove = ohci_usb_remove,
.ops = &ohci_usb_ops,
- .priv_auto_alloc_size = sizeof(struct generic_ohci),
+ .priv_auto = sizeof(struct generic_ohci),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};
projects / platform / kernel / u-boot.git / blobdiff