Convert CONFIG_USB_OHCI_NEW et al to Kconfig
[platform/kernel/u-boot.git] / drivers / usb / host / ohci-generic.c
index f3307f4..5d23058 100644 (file)
+// 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[] = {
@@ -40,6 +194,6 @@ U_BOOT_DRIVER(ohci_generic) = {
        .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,
 };