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e6b5be2be4
Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEABECAAYFAlSOD20ACgkQMUfUDdst+ylLPACg2QrW1oHhdTMT9WI8jihlHVRM 53kAoLeteByQ3iVwWurwwseRPiWa8+MI =OVRS -----END PGP SIGNATURE----- Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core update from Greg KH: "Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while" * tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits) Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries" fs: debugfs: add forward declaration for struct device type firmware class: Deletion of an unnecessary check before the function call "vunmap" firmware loader: fix hung task warning dump devcoredump: provide a one-way disable function device: Add dev_<level>_once variants ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries ath: use seq_file api for ath9k debugfs files debugfs: add helper function to create device related seq_file drivers/base: cacheinfo: remove noisy error boot message Revert "core: platform: add warning if driver has no owner" drivers: base: support cpu cache information interface to userspace via sysfs drivers: base: add cpu_device_create to support per-cpu devices topology: replace custom attribute macros with standard DEVICE_ATTR* cpumask: factor out show_cpumap into separate helper function driver core: Fix unbalanced device reference in drivers_probe driver core: fix race with userland in device_add() sysfs/kernfs: make read requests on pre-alloc files use the buffer. sysfs/kernfs: allow attributes to request write buffer be pre-allocated. fs: sysfs: return EGBIG on write if offset is larger than file size ...
312 lines
7.1 KiB
C
312 lines
7.1 KiB
C
/*
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* SAMSUNG EXYNOS USB HOST OHCI Controller
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*
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* Copyright (C) 2011 Samsung Electronics Co.Ltd
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* Author: Jingoo Han <jg1.han@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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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/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/phy/phy.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include "ohci.h"
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#define DRIVER_DESC "OHCI EXYNOS driver"
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static const char hcd_name[] = "ohci-exynos";
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static struct hc_driver __read_mostly exynos_ohci_hc_driver;
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#define to_exynos_ohci(hcd) (struct exynos_ohci_hcd *)(hcd_to_ohci(hcd)->priv)
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#define PHY_NUMBER 3
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struct exynos_ohci_hcd {
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struct clk *clk;
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struct phy *phy[PHY_NUMBER];
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};
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static int exynos_ohci_get_phy(struct device *dev,
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struct exynos_ohci_hcd *exynos_ohci)
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{
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struct device_node *child;
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struct phy *phy;
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int phy_number;
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int ret;
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/* Get PHYs for the controller */
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for_each_available_child_of_node(dev->of_node, child) {
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ret = of_property_read_u32(child, "reg", &phy_number);
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if (ret) {
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dev_err(dev, "Failed to parse device tree\n");
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of_node_put(child);
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return ret;
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}
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if (phy_number >= PHY_NUMBER) {
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dev_err(dev, "Invalid number of PHYs\n");
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of_node_put(child);
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return -EINVAL;
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}
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phy = devm_of_phy_get(dev, child, NULL);
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exynos_ohci->phy[phy_number] = phy;
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if (IS_ERR(phy)) {
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ret = PTR_ERR(phy);
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if (ret == -EPROBE_DEFER) {
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return ret;
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} else if (ret != -ENOSYS && ret != -ENODEV) {
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dev_err(dev,
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"Error retrieving usb2 phy: %d\n", ret);
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return ret;
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}
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}
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}
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return 0;
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}
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static int exynos_ohci_phy_enable(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
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int i;
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int ret = 0;
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for (i = 0; ret == 0 && i < PHY_NUMBER; i++)
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if (!IS_ERR(exynos_ohci->phy[i]))
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ret = phy_power_on(exynos_ohci->phy[i]);
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if (ret)
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for (i--; i >= 0; i--)
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if (!IS_ERR(exynos_ohci->phy[i]))
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phy_power_off(exynos_ohci->phy[i]);
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return ret;
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}
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static void exynos_ohci_phy_disable(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
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int i;
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for (i = 0; i < PHY_NUMBER; i++)
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if (!IS_ERR(exynos_ohci->phy[i]))
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phy_power_off(exynos_ohci->phy[i]);
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}
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static int exynos_ohci_probe(struct platform_device *pdev)
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{
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struct exynos_ohci_hcd *exynos_ohci;
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struct usb_hcd *hcd;
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struct resource *res;
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int irq;
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int err;
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/*
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* Right now device-tree probed devices don't get dma_mask set.
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* Since shared usb code relies on it, set it here for now.
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* Once we move to full device tree support this will vanish off.
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*/
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err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
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if (err)
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return err;
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hcd = usb_create_hcd(&exynos_ohci_hc_driver,
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&pdev->dev, dev_name(&pdev->dev));
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if (!hcd) {
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dev_err(&pdev->dev, "Unable to create HCD\n");
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return -ENOMEM;
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}
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exynos_ohci = to_exynos_ohci(hcd);
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if (of_device_is_compatible(pdev->dev.of_node,
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"samsung,exynos5440-ohci"))
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goto skip_phy;
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err = exynos_ohci_get_phy(&pdev->dev, exynos_ohci);
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if (err)
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goto fail_clk;
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skip_phy:
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exynos_ohci->clk = devm_clk_get(&pdev->dev, "usbhost");
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if (IS_ERR(exynos_ohci->clk)) {
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dev_err(&pdev->dev, "Failed to get usbhost clock\n");
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err = PTR_ERR(exynos_ohci->clk);
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goto fail_clk;
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}
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err = clk_prepare_enable(exynos_ohci->clk);
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if (err)
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goto fail_clk;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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hcd->regs = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(hcd->regs)) {
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err = PTR_ERR(hcd->regs);
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goto fail_io;
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}
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hcd->rsrc_start = res->start;
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hcd->rsrc_len = resource_size(res);
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irq = platform_get_irq(pdev, 0);
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if (!irq) {
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dev_err(&pdev->dev, "Failed to get IRQ\n");
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err = -ENODEV;
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goto fail_io;
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}
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platform_set_drvdata(pdev, hcd);
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err = exynos_ohci_phy_enable(&pdev->dev);
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if (err) {
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dev_err(&pdev->dev, "Failed to enable USB phy\n");
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goto fail_io;
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}
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err = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (err) {
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dev_err(&pdev->dev, "Failed to add USB HCD\n");
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goto fail_add_hcd;
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}
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device_wakeup_enable(hcd->self.controller);
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return 0;
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fail_add_hcd:
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exynos_ohci_phy_disable(&pdev->dev);
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fail_io:
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clk_disable_unprepare(exynos_ohci->clk);
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fail_clk:
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usb_put_hcd(hcd);
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return err;
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}
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static int exynos_ohci_remove(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
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usb_remove_hcd(hcd);
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exynos_ohci_phy_disable(&pdev->dev);
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clk_disable_unprepare(exynos_ohci->clk);
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usb_put_hcd(hcd);
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return 0;
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}
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static void exynos_ohci_shutdown(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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if (hcd->driver->shutdown)
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hcd->driver->shutdown(hcd);
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}
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#ifdef CONFIG_PM
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static int exynos_ohci_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 exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
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bool do_wakeup = device_may_wakeup(dev);
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int rc = ohci_suspend(hcd, do_wakeup);
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if (rc)
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return rc;
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exynos_ohci_phy_disable(dev);
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clk_disable_unprepare(exynos_ohci->clk);
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return 0;
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}
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static int exynos_ohci_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 exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
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int ret;
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clk_prepare_enable(exynos_ohci->clk);
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ret = exynos_ohci_phy_enable(dev);
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if (ret) {
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dev_err(dev, "Failed to enable USB phy\n");
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clk_disable_unprepare(exynos_ohci->clk);
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return ret;
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}
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ohci_resume(hcd, false);
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return 0;
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}
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#else
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#define exynos_ohci_suspend NULL
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#define exynos_ohci_resume NULL
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#endif
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static const struct ohci_driver_overrides exynos_overrides __initconst = {
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.extra_priv_size = sizeof(struct exynos_ohci_hcd),
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};
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static const struct dev_pm_ops exynos_ohci_pm_ops = {
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.suspend = exynos_ohci_suspend,
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.resume = exynos_ohci_resume,
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};
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#ifdef CONFIG_OF
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static const struct of_device_id exynos_ohci_match[] = {
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{ .compatible = "samsung,exynos4210-ohci" },
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{ .compatible = "samsung,exynos5440-ohci" },
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{},
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};
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MODULE_DEVICE_TABLE(of, exynos_ohci_match);
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#endif
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static struct platform_driver exynos_ohci_driver = {
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.probe = exynos_ohci_probe,
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.remove = exynos_ohci_remove,
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.shutdown = exynos_ohci_shutdown,
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.driver = {
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.name = "exynos-ohci",
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.pm = &exynos_ohci_pm_ops,
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.of_match_table = of_match_ptr(exynos_ohci_match),
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}
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};
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static int __init ohci_exynos_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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ohci_init_driver(&exynos_ohci_hc_driver, &exynos_overrides);
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return platform_driver_register(&exynos_ohci_driver);
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}
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module_init(ohci_exynos_init);
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static void __exit ohci_exynos_cleanup(void)
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{
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platform_driver_unregister(&exynos_ohci_driver);
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}
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module_exit(ohci_exynos_cleanup);
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MODULE_ALIAS("platform:exynos-ohci");
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MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
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MODULE_LICENSE("GPL v2");
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