forked from Minki/linux
USB: Add initial S5P EHCI driver
This patch adds host USB high speed driver for samsung S5P series. This is initial driver and we need additional implementation to support some functions like power management. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Joonyoung Shim
Greg Kroah-Hartman
parent
8f1d169f99
commit
1bcc5aa87f
@ -65,6 +65,7 @@ config USB_ARCH_HAS_EHCI
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default y if ARCH_CNS3XXX
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default y if ARCH_VT8500
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default y if PLAT_SPEAR
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default y if PLAT_S5P
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default y if ARCH_MSM
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default PCI
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@ -188,6 +188,12 @@ config USB_EHCI_SH
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Enables support for the on-chip EHCI controller on the SuperH.
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If you use the PCI EHCI controller, this option is not necessary.
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config USB_EHCI_S5P
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boolean "S5P EHCI support"
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depends on USB_EHCI_HCD && PLAT_S5P
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help
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Enable support for the S5P SOC's on-chip EHCI controller.
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config USB_W90X900_EHCI
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bool "W90X900(W90P910) EHCI support"
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depends on USB_EHCI_HCD && ARCH_W90X900
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@ -1265,6 +1265,11 @@ MODULE_LICENSE ("GPL");
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#define PLATFORM_DRIVER tegra_ehci_driver
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#endif
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#ifdef CONFIG_USB_EHCI_S5P
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#include "ehci-s5p.c"
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#define PLATFORM_DRIVER s5p_ehci_driver
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#endif
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#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
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!defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
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!defined(XILINX_OF_PLATFORM_DRIVER)
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201
drivers/usb/host/ehci-s5p.c
Normal file
201
drivers/usb/host/ehci-s5p.c
Normal file
@ -0,0 +1,201 @@
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/*
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* SAMSUNG S5P USB HOST EHCI 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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* Author: Joonyoung Shim <jy0922.shim@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/platform_device.h>
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#include <mach/regs-pmu.h>
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#include <plat/cpu.h>
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#include <plat/ehci.h>
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#include <plat/usb-phy.h>
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struct s5p_ehci_hcd {
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struct device *dev;
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struct usb_hcd *hcd;
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struct clk *clk;
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};
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static const struct hc_driver s5p_ehci_hc_driver = {
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.description = hcd_name,
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.product_desc = "S5P EHCI Host Controller",
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.hcd_priv_size = sizeof(struct ehci_hcd),
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.irq = ehci_irq,
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.flags = HCD_MEMORY | HCD_USB2,
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.reset = ehci_init,
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.start = ehci_run,
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.stop = ehci_stop,
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.shutdown = ehci_shutdown,
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.get_frame_number = ehci_get_frame,
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.urb_enqueue = ehci_urb_enqueue,
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.urb_dequeue = ehci_urb_dequeue,
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.endpoint_disable = ehci_endpoint_disable,
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.endpoint_reset = ehci_endpoint_reset,
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.hub_status_data = ehci_hub_status_data,
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.hub_control = ehci_hub_control,
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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.relinquish_port = ehci_relinquish_port,
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.port_handed_over = ehci_port_handed_over,
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.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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};
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static int s5p_ehci_probe(struct platform_device *pdev)
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{
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struct s5p_ehci_platdata *pdata;
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struct s5p_ehci_hcd *s5p_ehci;
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struct usb_hcd *hcd;
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struct ehci_hcd *ehci;
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struct resource *res;
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int irq;
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int err;
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pdata = pdev->dev.platform_data;
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if (!pdata) {
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dev_err(&pdev->dev, "No platform data defined\n");
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return -EINVAL;
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}
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s5p_ehci = kzalloc(sizeof(struct s5p_ehci_hcd), GFP_KERNEL);
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if (!s5p_ehci)
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return -ENOMEM;
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s5p_ehci->dev = &pdev->dev;
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hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
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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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err = -ENOMEM;
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goto fail_hcd;
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}
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s5p_ehci->clk = clk_get(&pdev->dev, "usbhost");
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if (IS_ERR(s5p_ehci->clk)) {
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dev_err(&pdev->dev, "Failed to get usbhost clock\n");
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err = PTR_ERR(s5p_ehci->clk);
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goto fail_clk;
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}
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err = clk_enable(s5p_ehci->clk);
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if (err)
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goto fail_clken;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&pdev->dev, "Failed to get I/O memory\n");
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err = -ENXIO;
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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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hcd->regs = ioremap(res->start, resource_size(res));
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if (!hcd->regs) {
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dev_err(&pdev->dev, "Failed to remap I/O memory\n");
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err = -ENOMEM;
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goto fail_io;
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}
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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;
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}
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if (pdata->phy_init)
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pdata->phy_init(pdev, S5P_USB_PHY_HOST);
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ehci = hcd_to_ehci(hcd);
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ehci->caps = hcd->regs;
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ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
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dbg_hcs_params(ehci, "reset");
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dbg_hcc_params(ehci, "reset");
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/* cache this readonly data; minimize chip reads */
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ehci->hcs_params = readl(&ehci->caps->hcs_params);
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err = usb_add_hcd(hcd, irq, IRQF_DISABLED | 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;
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}
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platform_set_drvdata(pdev, s5p_ehci);
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return 0;
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fail:
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iounmap(hcd->regs);
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fail_io:
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clk_disable(s5p_ehci->clk);
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fail_clken:
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clk_put(s5p_ehci->clk);
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fail_clk:
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usb_put_hcd(hcd);
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fail_hcd:
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kfree(s5p_ehci);
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return err;
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}
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static int s5p_ehci_remove(struct platform_device *pdev)
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{
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struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
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struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
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struct usb_hcd *hcd = s5p_ehci->hcd;
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usb_remove_hcd(hcd);
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if (pdata && pdata->phy_exit)
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pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
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iounmap(hcd->regs);
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clk_disable(s5p_ehci->clk);
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clk_put(s5p_ehci->clk);
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usb_put_hcd(hcd);
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kfree(s5p_ehci);
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return 0;
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}
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static void s5p_ehci_shutdown(struct platform_device *pdev)
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{
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struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
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struct usb_hcd *hcd = s5p_ehci->hcd;
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if (hcd->driver->shutdown)
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hcd->driver->shutdown(hcd);
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}
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static struct platform_driver s5p_ehci_driver = {
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.probe = s5p_ehci_probe,
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.remove = s5p_ehci_remove,
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.shutdown = s5p_ehci_shutdown,
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.driver = {
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.name = "s5p-ehci",
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.owner = THIS_MODULE,
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}
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};
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MODULE_ALIAS("platform:s5p-ehci");
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