mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-04 09:06:55 +07:00
b4629a7bdf
When using OF defined controllers the platform data struct is shared between all devices, so it can't be used for device specific settings. However it is currently used for the OF properties needs-reset-on-resume and has-transaction-translator. To fix this issue move setting hcd->has_tt to the probe and move pdata->reset_on_resume to the private data. Signed-off-by: Alban Bedel <albeu@free.fr> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
431 lines
10 KiB
C
431 lines
10 KiB
C
/*
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* Generic platform ehci driver
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*
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* Copyright 2007 Steven Brown <sbrown@cortland.com>
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* Copyright 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
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* Copyright 2014 Hans de Goede <hdegoede@redhat.com>
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*
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* Derived from the ohci-ssb driver
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* Copyright 2007 Michael Buesch <m@bues.ch>
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*
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* Derived from the EHCI-PCI driver
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* Copyright (c) 2000-2004 by David Brownell
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*
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* Derived from the ohci-pci driver
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* Copyright 1999 Roman Weissgaerber
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* Copyright 2000-2002 David Brownell
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* Copyright 1999 Linus Torvalds
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* Copyright 1999 Gregory P. Smith
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*
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* Licensed under the GNU/GPL. See COPYING for details.
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*/
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#include <linux/clk.h>
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#include <linux/dma-mapping.h>
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#include <linux/err.h>
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#include <linux/kernel.h>
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#include <linux/hrtimer.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/phy/phy.h>
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#include <linux/platform_device.h>
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#include <linux/reset.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include <linux/usb/ehci_pdriver.h>
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#include "ehci.h"
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#define DRIVER_DESC "EHCI generic platform driver"
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#define EHCI_MAX_CLKS 3
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#define hcd_to_ehci_priv(h) ((struct ehci_platform_priv *)hcd_to_ehci(h)->priv)
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struct ehci_platform_priv {
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struct clk *clks[EHCI_MAX_CLKS];
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struct reset_control *rst;
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struct phy **phys;
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int num_phys;
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bool reset_on_resume;
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};
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static const char hcd_name[] = "ehci-platform";
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static int ehci_platform_reset(struct usb_hcd *hcd)
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{
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struct platform_device *pdev = to_platform_device(hcd->self.controller);
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struct usb_ehci_pdata *pdata = dev_get_platdata(&pdev->dev);
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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int retval;
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ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
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if (pdata->pre_setup) {
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retval = pdata->pre_setup(hcd);
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if (retval < 0)
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return retval;
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}
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ehci->caps = hcd->regs + pdata->caps_offset;
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retval = ehci_setup(hcd);
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if (retval)
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return retval;
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if (pdata->no_io_watchdog)
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ehci->need_io_watchdog = 0;
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return 0;
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}
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static int ehci_platform_power_on(struct platform_device *dev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(dev);
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struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
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int clk, ret, phy_num;
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for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++) {
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ret = clk_prepare_enable(priv->clks[clk]);
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if (ret)
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goto err_disable_clks;
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}
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for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
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ret = phy_init(priv->phys[phy_num]);
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if (ret)
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goto err_exit_phy;
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ret = phy_power_on(priv->phys[phy_num]);
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if (ret) {
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phy_exit(priv->phys[phy_num]);
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goto err_exit_phy;
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}
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}
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return 0;
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err_exit_phy:
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while (--phy_num >= 0) {
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phy_power_off(priv->phys[phy_num]);
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phy_exit(priv->phys[phy_num]);
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}
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err_disable_clks:
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while (--clk >= 0)
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clk_disable_unprepare(priv->clks[clk]);
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return ret;
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}
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static void ehci_platform_power_off(struct platform_device *dev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(dev);
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struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
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int clk, phy_num;
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for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
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phy_power_off(priv->phys[phy_num]);
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phy_exit(priv->phys[phy_num]);
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}
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for (clk = EHCI_MAX_CLKS - 1; clk >= 0; clk--)
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if (priv->clks[clk])
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clk_disable_unprepare(priv->clks[clk]);
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}
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static struct hc_driver __read_mostly ehci_platform_hc_driver;
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static const struct ehci_driver_overrides platform_overrides __initconst = {
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.reset = ehci_platform_reset,
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.extra_priv_size = sizeof(struct ehci_platform_priv),
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};
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static struct usb_ehci_pdata ehci_platform_defaults = {
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.power_on = ehci_platform_power_on,
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.power_suspend = ehci_platform_power_off,
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.power_off = ehci_platform_power_off,
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};
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static int ehci_platform_probe(struct platform_device *dev)
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{
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struct usb_hcd *hcd;
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struct resource *res_mem;
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struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
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struct ehci_platform_priv *priv;
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struct ehci_hcd *ehci;
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int err, irq, phy_num, clk = 0;
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if (usb_disabled())
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return -ENODEV;
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/*
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* Use reasonable defaults so platforms don't have to provide these
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* with DT probing on ARM.
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*/
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if (!pdata)
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pdata = &ehci_platform_defaults;
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err = dma_coerce_mask_and_coherent(&dev->dev,
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pdata->dma_mask_64 ? DMA_BIT_MASK(64) : DMA_BIT_MASK(32));
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if (err)
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return err;
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irq = platform_get_irq(dev, 0);
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if (irq < 0) {
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dev_err(&dev->dev, "no irq provided");
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return irq;
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}
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hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
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dev_name(&dev->dev));
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if (!hcd)
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return -ENOMEM;
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platform_set_drvdata(dev, hcd);
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dev->dev.platform_data = pdata;
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priv = hcd_to_ehci_priv(hcd);
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ehci = hcd_to_ehci(hcd);
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if (pdata == &ehci_platform_defaults && dev->dev.of_node) {
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if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
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ehci->big_endian_mmio = 1;
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if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
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ehci->big_endian_desc = 1;
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if (of_property_read_bool(dev->dev.of_node, "big-endian"))
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ehci->big_endian_mmio = ehci->big_endian_desc = 1;
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if (of_property_read_bool(dev->dev.of_node,
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"needs-reset-on-resume"))
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priv->reset_on_resume = true;
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if (of_property_read_bool(dev->dev.of_node,
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"has-transaction-translator"))
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hcd->has_tt = 1;
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priv->num_phys = of_count_phandle_with_args(dev->dev.of_node,
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"phys", "#phy-cells");
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if (priv->num_phys > 0) {
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priv->phys = devm_kcalloc(&dev->dev, priv->num_phys,
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sizeof(struct phy *), GFP_KERNEL);
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if (!priv->phys)
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return -ENOMEM;
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} else
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priv->num_phys = 0;
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for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
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priv->phys[phy_num] = devm_of_phy_get_by_index(
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&dev->dev, dev->dev.of_node, phy_num);
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if (IS_ERR(priv->phys[phy_num])) {
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err = PTR_ERR(priv->phys[phy_num]);
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goto err_put_hcd;
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}
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}
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for (clk = 0; clk < EHCI_MAX_CLKS; clk++) {
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priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
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if (IS_ERR(priv->clks[clk])) {
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err = PTR_ERR(priv->clks[clk]);
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if (err == -EPROBE_DEFER)
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goto err_put_clks;
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priv->clks[clk] = NULL;
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break;
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}
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}
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}
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priv->rst = devm_reset_control_get_optional(&dev->dev, NULL);
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if (IS_ERR(priv->rst)) {
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err = PTR_ERR(priv->rst);
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if (err == -EPROBE_DEFER)
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goto err_put_clks;
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priv->rst = NULL;
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} else {
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err = reset_control_deassert(priv->rst);
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if (err)
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goto err_put_clks;
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}
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if (pdata->big_endian_desc)
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ehci->big_endian_desc = 1;
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if (pdata->big_endian_mmio)
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ehci->big_endian_mmio = 1;
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if (pdata->has_tt)
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hcd->has_tt = 1;
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if (pdata->reset_on_resume)
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priv->reset_on_resume = true;
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#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
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if (ehci->big_endian_mmio) {
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dev_err(&dev->dev,
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"Error: CONFIG_USB_EHCI_BIG_ENDIAN_MMIO not set\n");
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err = -EINVAL;
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goto err_reset;
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}
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#endif
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#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
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if (ehci->big_endian_desc) {
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dev_err(&dev->dev,
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"Error: CONFIG_USB_EHCI_BIG_ENDIAN_DESC not set\n");
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err = -EINVAL;
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goto err_reset;
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}
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#endif
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if (pdata->power_on) {
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err = pdata->power_on(dev);
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if (err < 0)
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goto err_reset;
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}
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res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
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hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
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if (IS_ERR(hcd->regs)) {
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err = PTR_ERR(hcd->regs);
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goto err_power;
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}
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hcd->rsrc_start = res_mem->start;
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hcd->rsrc_len = resource_size(res_mem);
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err = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (err)
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goto err_power;
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device_wakeup_enable(hcd->self.controller);
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platform_set_drvdata(dev, hcd);
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return err;
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err_power:
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if (pdata->power_off)
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pdata->power_off(dev);
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err_reset:
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if (priv->rst)
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reset_control_assert(priv->rst);
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err_put_clks:
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while (--clk >= 0)
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clk_put(priv->clks[clk]);
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err_put_hcd:
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if (pdata == &ehci_platform_defaults)
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dev->dev.platform_data = NULL;
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usb_put_hcd(hcd);
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return err;
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}
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static int ehci_platform_remove(struct platform_device *dev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(dev);
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struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
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struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
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int clk;
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usb_remove_hcd(hcd);
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if (pdata->power_off)
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pdata->power_off(dev);
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if (priv->rst)
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reset_control_assert(priv->rst);
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for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++)
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clk_put(priv->clks[clk]);
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usb_put_hcd(hcd);
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if (pdata == &ehci_platform_defaults)
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dev->dev.platform_data = NULL;
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static int ehci_platform_suspend(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
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struct platform_device *pdev =
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container_of(dev, struct platform_device, dev);
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bool do_wakeup = device_may_wakeup(dev);
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int ret;
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ret = ehci_suspend(hcd, do_wakeup);
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if (ret)
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return ret;
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if (pdata->power_suspend)
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pdata->power_suspend(pdev);
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return ret;
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}
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static int ehci_platform_resume(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
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struct platform_device *pdev =
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container_of(dev, struct platform_device, dev);
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struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
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if (pdata->power_on) {
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int err = pdata->power_on(pdev);
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if (err < 0)
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return err;
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}
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ehci_resume(hcd, priv->reset_on_resume);
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return 0;
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}
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#endif /* CONFIG_PM_SLEEP */
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static const struct of_device_id vt8500_ehci_ids[] = {
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{ .compatible = "via,vt8500-ehci", },
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{ .compatible = "wm,prizm-ehci", },
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{ .compatible = "generic-ehci", },
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{ .compatible = "cavium,octeon-6335-ehci", },
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{}
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};
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MODULE_DEVICE_TABLE(of, vt8500_ehci_ids);
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static const struct platform_device_id ehci_platform_table[] = {
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{ "ehci-platform", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(platform, ehci_platform_table);
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static SIMPLE_DEV_PM_OPS(ehci_platform_pm_ops, ehci_platform_suspend,
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ehci_platform_resume);
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static struct platform_driver ehci_platform_driver = {
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.id_table = ehci_platform_table,
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.probe = ehci_platform_probe,
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.remove = ehci_platform_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.name = "ehci-platform",
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.pm = &ehci_platform_pm_ops,
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.of_match_table = vt8500_ehci_ids,
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}
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};
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static int __init ehci_platform_init(void)
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{
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if (usb_disabled())
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return -ENODEV;
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pr_info("%s: " DRIVER_DESC "\n", hcd_name);
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ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides);
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return platform_driver_register(&ehci_platform_driver);
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}
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module_init(ehci_platform_init);
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static void __exit ehci_platform_cleanup(void)
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{
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platform_driver_unregister(&ehci_platform_driver);
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}
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module_exit(ehci_platform_cleanup);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_AUTHOR("Hauke Mehrtens");
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MODULE_AUTHOR("Alan Stern");
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MODULE_LICENSE("GPL");
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