+// 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 <log.h>
+#include <dm/device_compat.h>
+#include <dm/devres.h>
+#include <dm/ofnode.h>
+#include <generic-phy.h>
+#include <reset.h>
+#include <asm/io.h>
#include <dm.h>
#include "ehci.h"
+#include <power/regulator.h>
/*
* Even though here we don't explicitly use "struct ehci_ctrl"
*/
struct generic_ehci {
struct ehci_ctrl ctrl;
+ struct clk *clocks;
+ struct reset_ctl *resets;
+ struct phy phy;
+#ifdef CONFIG_DM_REGULATOR
+ struct udevice *vbus_supply;
+#endif
+ int clock_count;
+ int reset_count;
};
+#ifdef CONFIG_DM_REGULATOR
+static int ehci_enable_vbus_supply(struct udevice *dev)
+{
+ struct generic_ehci *priv = dev_get_priv(dev);
+ int ret;
+
+ ret = device_get_supply_regulator(dev, "vbus-supply",
+ &priv->vbus_supply);
+ if (ret && ret != -ENOENT)
+ return ret;
+
+ if (priv->vbus_supply) {
+ ret = regulator_set_enable(priv->vbus_supply, true);
+ if (ret) {
+ dev_err(dev, "Error enabling VBUS supply\n");
+ return ret;
+ }
+ } else {
+ dev_dbg(dev, "No vbus supply\n");
+ }
+
+ return 0;
+}
+
+static int ehci_disable_vbus_supply(struct generic_ehci *priv)
+{
+ if (priv->vbus_supply)
+ return regulator_set_enable(priv->vbus_supply, false);
+ else
+ return 0;
+}
+#else
+static int ehci_enable_vbus_supply(struct udevice *dev)
+{
+ return 0;
+}
+
+static int ehci_disable_vbus_supply(struct generic_ehci *priv)
+{
+ return 0;
+}
+#endif
+
static int ehci_usb_probe(struct udevice *dev)
{
- struct ehci_hccr *hccr = (struct ehci_hccr *)dev_get_addr(dev);
+ struct generic_ehci *priv = dev_get_priv(dev);
+ struct ehci_hccr *hccr;
struct ehci_hcor *hcor;
+ int i, err, ret, clock_nb, reset_nb;
+
+ err = 0;
+ priv->clock_count = 0;
+ clock_nb = ofnode_count_phandle_with_args(dev_ofnode(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 && 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 = ofnode_count_phandle_with_args(dev_ofnode(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;
+
+ if (reset_deassert(&priv->resets[i])) {
+ 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 = ehci_enable_vbus_supply(dev);
+ if (err)
+ goto reset_err;
+
+ err = ehci_setup_phy(dev, &priv->phy, 0);
+ if (err)
+ goto regulator_err;
+
+ hccr = map_physmem(dev_read_addr(dev), 0x100, MAP_NOCACHE);
hcor = (struct ehci_hcor *)((uintptr_t)hccr +
HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
- return ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
+ err = ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
+ if (err)
+ goto phy_err;
+
+ return 0;
+
+phy_err:
+ ret = ehci_shutdown_phy(dev, &priv->phy);
+ if (ret)
+ dev_err(dev, "failed to shutdown usb phy\n");
+
+regulator_err:
+ ret = ehci_disable_vbus_supply(priv);
+ if (ret)
+ dev_err(dev, "failed to disable VBUS supply\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 ehci_usb_remove(struct udevice *dev)
{
- return ehci_deregister(dev);
+ struct generic_ehci *priv = dev_get_priv(dev);
+ int ret;
+
+ ret = ehci_deregister(dev);
+ if (ret)
+ return ret;
+
+ ret = ehci_shutdown_phy(dev, &priv->phy);
+ if (ret)
+ return ret;
+
+ ret = ehci_disable_vbus_supply(priv);
+ 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 ehci_usb_ids[] = {
projects / oweals / u-boot.git / blobdiff