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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
214 lines
4.5 KiB
C
214 lines
4.5 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/ofnode.h>
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#include <generic-phy.h>
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#include <reset.h>
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#include <asm/io.h>
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#include <dm.h>
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#include "ehci.h"
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/*
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* Even though here we don't explicitly use "struct ehci_ctrl"
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* ehci_register() expects it to be the first thing that resides in
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* device's private data.
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*/
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struct generic_ehci {
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struct ehci_ctrl ctrl;
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struct clk *clocks;
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struct reset_ctl *resets;
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struct phy phy;
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int clock_count;
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int reset_count;
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};
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static int ehci_setup_phy(struct udevice *dev, int index)
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{
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struct generic_ehci *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 ehci_shutdown_phy(struct udevice *dev)
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{
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struct generic_ehci *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 ehci_usb_probe(struct udevice *dev)
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{
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struct generic_ehci *priv = dev_get_priv(dev);
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struct ehci_hccr *hccr;
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struct ehci_hcor *hcor;
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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 = ofnode_count_phandle_with_args(dev_ofnode(dev), "clocks",
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"#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) {
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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 {
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if (clock_nb != -ENOENT) {
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dev_err(dev, "failed to get clock phandle(%d)\n",
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clock_nb);
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return clock_nb;
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}
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}
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priv->reset_count = 0;
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reset_nb = ofnode_count_phandle_with_args(dev_ofnode(dev), "resets",
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"#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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if (reset_deassert(&priv->resets[i])) {
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dev_err(dev, "failed to deassert reset %d\n",
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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 {
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if (reset_nb != -ENOENT) {
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dev_err(dev, "failed to get reset phandle(%d)\n",
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reset_nb);
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goto clk_err;
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}
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}
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err = ehci_setup_phy(dev, 0);
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if (err)
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goto reset_err;
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hccr = map_physmem(dev_read_addr(dev), 0x100, MAP_NOCACHE);
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hcor = (struct ehci_hcor *)((uintptr_t)hccr +
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HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
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err = ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
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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 = ehci_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 ehci_usb_remove(struct udevice *dev)
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{
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struct generic_ehci *priv = dev_get_priv(dev);
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int ret;
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ret = ehci_deregister(dev);
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if (ret)
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return ret;
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ret = ehci_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 ehci_usb_ids[] = {
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{ .compatible = "generic-ehci" },
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{ }
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};
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U_BOOT_DRIVER(ehci_generic) = {
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.name = "ehci_generic",
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.id = UCLASS_USB,
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.of_match = ehci_usb_ids,
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.probe = ehci_usb_probe,
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.remove = ehci_usb_remove,
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.ops = &ehci_usb_ops,
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.priv_auto_alloc_size = sizeof(struct generic_ehci),
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.flags = DM_FLAG_ALLOC_PRIV_DMA,
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};
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