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usb: ehci: backport ehci-platform.c driver from kernel-3.18
This commit is contained in:
lyz
Huang, Tao
parent
c7877396ea
commit
7844ff3788
254
drivers/usb/host/ehci-platform.c
Normal file → Executable file
254
drivers/usb/host/ehci-platform.c
Normal file → Executable file
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@ -3,6 +3,7 @@
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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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@ -18,6 +19,7 @@
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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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@ -25,7 +27,9 @@
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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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@ -33,20 +37,32 @@
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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 *phy;
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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 = pdev->dev.platform_data;
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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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hcd->has_tt = pdata->has_tt;
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ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
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ehci->big_endian_desc = pdata->big_endian_desc;
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ehci->big_endian_mmio = pdata->big_endian_mmio;
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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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@ -58,83 +74,209 @@ static int ehci_platform_reset(struct usb_hcd *hcd)
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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;
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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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if (priv->phy) {
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ret = phy_init(priv->phy);
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if (ret)
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goto err_disable_clks;
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ret = phy_power_on(priv->phy);
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if (ret)
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goto err_exit_phy;
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}
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return 0;
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err_exit_phy:
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phy_exit(priv->phy);
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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;
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if (priv->phy) {
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phy_power_off(priv->phy);
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phy_exit(priv->phy);
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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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.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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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;
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int irq;
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int err = -ENOMEM;
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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, 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, none of these are set.
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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 (!dev->dev.platform_data)
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dev->dev.platform_data = &ehci_platform_defaults;
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if (!dev->dev.dma_mask)
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dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
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if (!dev->dev.coherent_dma_mask)
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dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
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if (!pdata)
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pdata = &ehci_platform_defaults;
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pdata = dev->dev.platform_data;
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err = dma_coerce_mask_and_coherent(&dev->dev, 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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res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
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if (!res_mem) {
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dev_err(&dev->dev, "no memory resource provided");
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return -ENXIO;
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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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priv->phy = devm_phy_get(&dev->dev, "usb");
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if (IS_ERR(priv->phy)) {
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err = PTR_ERR(priv->phy);
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if (err == -EPROBE_DEFER)
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goto err_put_hcd;
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priv->phy = NULL;
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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(&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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#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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return err;
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goto err_reset;
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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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err = -ENOMEM;
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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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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_put_hcd;
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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_put_hcd;
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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_put_hcd:
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usb_put_hcd(hcd);
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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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@ -142,33 +284,42 @@ static int ehci_platform_probe(struct platform_device *dev)
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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->dev.platform_data;
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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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usb_put_hcd(hcd);
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platform_set_drvdata(dev, NULL);
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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
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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->platform_data;
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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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@ -179,7 +330,7 @@ static int ehci_platform_suspend(struct device *dev)
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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->platform_data;
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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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@ -192,17 +343,15 @@ static int ehci_platform_resume(struct device *dev)
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ehci_resume(hcd, false);
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return 0;
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}
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#else /* !CONFIG_PM */
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#define ehci_platform_suspend NULL
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#define ehci_platform_resume NULL
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#endif /* CONFIG_PM */
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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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{}
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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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@ -210,10 +359,8 @@ static const struct platform_device_id ehci_platform_table[] = {
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};
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MODULE_DEVICE_TABLE(platform, ehci_platform_table);
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static const struct dev_pm_ops ehci_platform_pm_ops = {
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.suspend = ehci_platform_suspend,
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.resume = ehci_platform_resume,
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};
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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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@ -221,10 +368,9 @@ static struct platform_driver ehci_platform_driver = {
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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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.owner = THIS_MODULE,
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.name = "ehci-platform",
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.pm = &ehci_platform_pm_ops,
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.of_match_table = of_match_ptr(vt8500_ehci_ids),
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.of_match_table = vt8500_ehci_ids,
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}
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};
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1
include/linux/usb/ehci_pdriver.h
Normal file → Executable file
1
include/linux/usb/ehci_pdriver.h
Normal file → Executable file
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@ -50,6 +50,7 @@ struct usb_ehci_pdata {
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/* Turn on only VBUS suspend power and hotplug detection,
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* turn off everything else */
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void (*power_suspend)(struct platform_device *pdev);
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int (*pre_setup)(struct usb_hcd *hcd);
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};
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#endif /* __USB_CORE_EHCI_PDRIVER_H */
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