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![Kever Yang](/assets/img/avatar_default.png)
Some clock driver do not have a clk_enable() call back, and we should not treat this as fail in ehci probe like other modules, eg. clk_enabl_bulk() do not return fail if ret value is '-ENOSYS' Signed-off-by: Kever Yang <kever.yang@rock-chips.com> Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
199 lines
4.3 KiB
C
199 lines
4.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com>
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*/
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#include <common.h>
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#include <clk.h>
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#include <dm.h>
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#include <dm/ofnode.h>
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#include <generic-phy.h>
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#include <reset.h>
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#include "ohci.h"
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#if !defined(CONFIG_USB_OHCI_NEW)
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# error "Generic OHCI driver requires CONFIG_USB_OHCI_NEW"
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#endif
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struct generic_ohci {
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ohci_t ohci;
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struct clk *clocks; /* clock list */
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struct reset_ctl *resets; /* reset list */
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struct phy phy;
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int clock_count; /* number of clock in clock list */
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int reset_count; /* number of reset in reset list */
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};
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static int ohci_setup_phy(struct udevice *dev, int index)
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{
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struct generic_ohci *priv = dev_get_priv(dev);
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int ret;
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ret = generic_phy_get_by_index(dev, index, &priv->phy);
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if (ret) {
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if (ret != -ENOENT) {
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dev_err(dev, "failed to get usb phy\n");
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return ret;
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}
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} else {
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ret = generic_phy_init(&priv->phy);
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if (ret) {
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dev_err(dev, "failed to init usb phy\n");
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return ret;
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}
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ret = generic_phy_power_on(&priv->phy);
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if (ret) {
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dev_err(dev, "failed to power on usb phy\n");
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return generic_phy_exit(&priv->phy);
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}
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}
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return 0;
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}
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static int ohci_shutdown_phy(struct udevice *dev)
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{
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struct generic_ohci *priv = dev_get_priv(dev);
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int ret = 0;
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if (generic_phy_valid(&priv->phy)) {
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ret = generic_phy_power_off(&priv->phy);
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if (ret) {
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dev_err(dev, "failed to power off usb phy\n");
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return ret;
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}
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ret = generic_phy_exit(&priv->phy);
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if (ret) {
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dev_err(dev, "failed to power off usb phy\n");
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return ret;
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}
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}
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return 0;
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}
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static int ohci_usb_probe(struct udevice *dev)
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{
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struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev);
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struct generic_ohci *priv = dev_get_priv(dev);
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int i, err, ret, clock_nb, reset_nb;
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err = 0;
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priv->clock_count = 0;
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clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells");
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if (clock_nb > 0) {
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priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
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GFP_KERNEL);
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if (!priv->clocks)
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return -ENOMEM;
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for (i = 0; i < clock_nb; i++) {
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err = clk_get_by_index(dev, i, &priv->clocks[i]);
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if (err < 0)
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break;
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err = clk_enable(&priv->clocks[i]);
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if (err && err != -ENOSYS) {
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dev_err(dev, "failed to enable clock %d\n", i);
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clk_free(&priv->clocks[i]);
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goto clk_err;
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}
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priv->clock_count++;
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}
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} else if (clock_nb != -ENOENT) {
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dev_err(dev, "failed to get clock phandle(%d)\n", clock_nb);
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return clock_nb;
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}
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priv->reset_count = 0;
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reset_nb = dev_count_phandle_with_args(dev, "resets", "#reset-cells");
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if (reset_nb > 0) {
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priv->resets = devm_kcalloc(dev, reset_nb,
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sizeof(struct reset_ctl),
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GFP_KERNEL);
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if (!priv->resets)
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return -ENOMEM;
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for (i = 0; i < reset_nb; i++) {
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err = reset_get_by_index(dev, i, &priv->resets[i]);
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if (err < 0)
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break;
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err = reset_deassert(&priv->resets[i]);
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if (err) {
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dev_err(dev, "failed to deassert reset %d\n", i);
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reset_free(&priv->resets[i]);
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goto reset_err;
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}
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priv->reset_count++;
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}
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} else if (reset_nb != -ENOENT) {
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dev_err(dev, "failed to get reset phandle(%d)\n", reset_nb);
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goto clk_err;
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}
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err = ohci_setup_phy(dev, 0);
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if (err)
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goto reset_err;
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err = ohci_register(dev, regs);
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if (err)
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goto phy_err;
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return 0;
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phy_err:
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ret = ohci_shutdown_phy(dev);
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if (ret)
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dev_err(dev, "failed to shutdown usb phy\n");
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reset_err:
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ret = reset_release_all(priv->resets, priv->reset_count);
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if (ret)
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dev_err(dev, "failed to assert all resets\n");
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clk_err:
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ret = clk_release_all(priv->clocks, priv->clock_count);
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if (ret)
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dev_err(dev, "failed to disable all clocks\n");
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return err;
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}
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static int ohci_usb_remove(struct udevice *dev)
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{
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struct generic_ohci *priv = dev_get_priv(dev);
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int ret;
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ret = ohci_deregister(dev);
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if (ret)
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return ret;
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ret = ohci_shutdown_phy(dev);
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if (ret)
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return ret;
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ret = reset_release_all(priv->resets, priv->reset_count);
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if (ret)
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return ret;
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return clk_release_all(priv->clocks, priv->clock_count);
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}
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static const struct udevice_id ohci_usb_ids[] = {
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{ .compatible = "generic-ohci" },
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{ }
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};
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U_BOOT_DRIVER(ohci_generic) = {
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.name = "ohci_generic",
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.id = UCLASS_USB,
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.of_match = ohci_usb_ids,
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.probe = ohci_usb_probe,
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.remove = ohci_usb_remove,
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.ops = &ohci_usb_ops,
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.priv_auto_alloc_size = sizeof(struct generic_ohci),
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.flags = DM_FLAG_ALLOC_PRIV_DMA,
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};
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